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Add support for DragonFlyBSD target.
[binutils.git] / bfd / elf64-ppc.c
blob4cbd941baa2f1272e4baff9f8d448ec0ac0747ca
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x1000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_can_gc_sections 1
76 #define elf_backend_can_refcount 1
77 #define elf_backend_rela_normal 1
78 #define elf_backend_default_execstack 0
79
80 #define bfd_elf64_mkobject ppc64_elf_mkobject
81 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
85 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
86 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
87 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
89
90 #define elf_backend_object_p ppc64_elf_object_p
91 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
92 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
93 #define elf_backend_write_core_note ppc64_elf_write_core_note
94 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
95 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
96 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
97 #define elf_backend_check_directives ppc64_elf_process_dot_syms
98 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
99 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
100 #define elf_backend_check_relocs ppc64_elf_check_relocs
101 #define elf_backend_gc_keep ppc64_elf_gc_keep
102 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
103 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
104 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
105 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
106 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
107 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
108 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
109 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
110 #define elf_backend_action_discarded ppc64_elf_action_discarded
111 #define elf_backend_relocate_section ppc64_elf_relocate_section
112 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
113 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
114 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
115 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
116 #define elf_backend_special_sections ppc64_elf_special_sections
117 #define elf_backend_post_process_headers _bfd_elf_set_osabi
118
119 /* The name of the dynamic interpreter. This is put in the .interp
120 section. */
121 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
122
123 /* The size in bytes of an entry in the procedure linkage table. */
124 #define PLT_ENTRY_SIZE 24
125
126 /* The initial size of the plt reserved for the dynamic linker. */
127 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
128
129 /* TOC base pointers offset from start of TOC. */
130 #define TOC_BASE_OFF 0x8000
131
132 /* Offset of tp and dtp pointers from start of TLS block. */
133 #define TP_OFFSET 0x7000
134 #define DTP_OFFSET 0x8000
135
136 /* .plt call stub instructions. The normal stub is like this, but
137 sometimes the .plt entry crosses a 64k boundary and we need to
138 insert an addi to adjust r12. */
139 #define PLT_CALL_STUB_SIZE (7*4)
140 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
141 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
142 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
143 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
144 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
145 /* ld %r11,xxx+16@l(%r12) */
146 #define BCTR 0x4e800420 /* bctr */
147
148
149 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
150 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
151 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
152 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
153
154 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
155 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
156
157 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
158
159 /* glink call stub instructions. We enter with the index in R0. */
160 #define GLINK_CALL_STUB_SIZE (16*4)
161 /* 0: */
162 /* .quad plt0-1f */
163 /* __glink: */
164 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
165 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
166 /* 1: */
167 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
168 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
169 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
170 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
171 /* ld %11,0(%12) */
172 /* ld %2,8(%12) */
173 /* mtctr %11 */
174 /* ld %11,16(%12) */
175 /* bctr */
176
177 /* Pad with this. */
178 #define NOP 0x60000000
179
180 /* Some other nops. */
181 #define CROR_151515 0x4def7b82
182 #define CROR_313131 0x4ffffb82
183
184 /* .glink entries for the first 32k functions are two instructions. */
185 #define LI_R0_0 0x38000000 /* li %r0,0 */
186 #define B_DOT 0x48000000 /* b . */
187
188 /* After that, we need two instructions to load the index, followed by
189 a branch. */
190 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
191 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
192
193 /* Instructions used by the save and restore reg functions. */
194 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
195 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
196 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
197 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
198 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
199 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
200 #define LI_R12_0 0x39800000 /* li %r12,0 */
201 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
202 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
203 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
204 #define BLR 0x4e800020 /* blr */
205
206 /* Since .opd is an array of descriptors and each entry will end up
207 with identical R_PPC64_RELATIVE relocs, there is really no need to
208 propagate .opd relocs; The dynamic linker should be taught to
209 relocate .opd without reloc entries. */
210 #ifndef NO_OPD_RELOCS
211 #define NO_OPD_RELOCS 0
212 #endif
213 \f
214 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
215
216 /* Relocation HOWTO's. */
217 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
218
219 static reloc_howto_type ppc64_elf_howto_raw[] = {
220 /* This reloc does nothing. */
221 HOWTO (R_PPC64_NONE, /* type */
222 0, /* rightshift */
223 2, /* size (0 = byte, 1 = short, 2 = long) */
224 32, /* bitsize */
225 FALSE, /* pc_relative */
226 0, /* bitpos */
227 complain_overflow_dont, /* complain_on_overflow */
228 bfd_elf_generic_reloc, /* special_function */
229 "R_PPC64_NONE", /* name */
230 FALSE, /* partial_inplace */
231 0, /* src_mask */
232 0, /* dst_mask */
233 FALSE), /* pcrel_offset */
234
235 /* A standard 32 bit relocation. */
236 HOWTO (R_PPC64_ADDR32, /* type */
237 0, /* rightshift */
238 2, /* size (0 = byte, 1 = short, 2 = long) */
239 32, /* bitsize */
240 FALSE, /* pc_relative */
241 0, /* bitpos */
242 complain_overflow_bitfield, /* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_PPC64_ADDR32", /* name */
245 FALSE, /* partial_inplace */
246 0, /* src_mask */
247 0xffffffff, /* dst_mask */
248 FALSE), /* pcrel_offset */
249
250 /* An absolute 26 bit branch; the lower two bits must be zero.
251 FIXME: we don't check that, we just clear them. */
252 HOWTO (R_PPC64_ADDR24, /* type */
253 0, /* rightshift */
254 2, /* size (0 = byte, 1 = short, 2 = long) */
255 26, /* bitsize */
256 FALSE, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_bitfield, /* complain_on_overflow */
259 bfd_elf_generic_reloc, /* special_function */
260 "R_PPC64_ADDR24", /* name */
261 FALSE, /* partial_inplace */
262 0, /* src_mask */
263 0x03fffffc, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 /* A standard 16 bit relocation. */
267 HOWTO (R_PPC64_ADDR16, /* type */
268 0, /* rightshift */
269 1, /* size (0 = byte, 1 = short, 2 = long) */
270 16, /* bitsize */
271 FALSE, /* pc_relative */
272 0, /* bitpos */
273 complain_overflow_bitfield, /* complain_on_overflow */
274 bfd_elf_generic_reloc, /* special_function */
275 "R_PPC64_ADDR16", /* name */
276 FALSE, /* partial_inplace */
277 0, /* src_mask */
278 0xffff, /* dst_mask */
279 FALSE), /* pcrel_offset */
280
281 /* A 16 bit relocation without overflow. */
282 HOWTO (R_PPC64_ADDR16_LO, /* type */
283 0, /* rightshift */
284 1, /* size (0 = byte, 1 = short, 2 = long) */
285 16, /* bitsize */
286 FALSE, /* pc_relative */
287 0, /* bitpos */
288 complain_overflow_dont,/* complain_on_overflow */
289 bfd_elf_generic_reloc, /* special_function */
290 "R_PPC64_ADDR16_LO", /* name */
291 FALSE, /* partial_inplace */
292 0, /* src_mask */
293 0xffff, /* dst_mask */
294 FALSE), /* pcrel_offset */
295
296 /* Bits 16-31 of an address. */
297 HOWTO (R_PPC64_ADDR16_HI, /* type */
298 16, /* rightshift */
299 1, /* size (0 = byte, 1 = short, 2 = long) */
300 16, /* bitsize */
301 FALSE, /* pc_relative */
302 0, /* bitpos */
303 complain_overflow_dont, /* complain_on_overflow */
304 bfd_elf_generic_reloc, /* special_function */
305 "R_PPC64_ADDR16_HI", /* name */
306 FALSE, /* partial_inplace */
307 0, /* src_mask */
308 0xffff, /* dst_mask */
309 FALSE), /* pcrel_offset */
310
311 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
312 bits, treated as a signed number, is negative. */
313 HOWTO (R_PPC64_ADDR16_HA, /* type */
314 16, /* rightshift */
315 1, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_dont, /* complain_on_overflow */
320 ppc64_elf_ha_reloc, /* special_function */
321 "R_PPC64_ADDR16_HA", /* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xffff, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch; the lower two bits must be zero.
328 FIXME: we don't check that, we just clear them. */
329 HOWTO (R_PPC64_ADDR14, /* type */
330 0, /* rightshift */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
332 16, /* bitsize */
333 FALSE, /* pc_relative */
334 0, /* bitpos */
335 complain_overflow_bitfield, /* complain_on_overflow */
336 ppc64_elf_branch_reloc, /* special_function */
337 "R_PPC64_ADDR14", /* name */
338 FALSE, /* partial_inplace */
339 0, /* src_mask */
340 0x0000fffc, /* dst_mask */
341 FALSE), /* pcrel_offset */
342
343 /* An absolute 16 bit branch, for which bit 10 should be set to
344 indicate that the branch is expected to be taken. The lower two
345 bits must be zero. */
346 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 0, /* bitpos */
352 complain_overflow_bitfield, /* complain_on_overflow */
353 ppc64_elf_brtaken_reloc, /* special_function */
354 "R_PPC64_ADDR14_BRTAKEN",/* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0x0000fffc, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 /* An absolute 16 bit branch, for which bit 10 should be set to
361 indicate that the branch is not expected to be taken. The lower
362 two bits must be zero. */
363 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
364 0, /* rightshift */
365 2, /* size (0 = byte, 1 = short, 2 = long) */
366 16, /* bitsize */
367 FALSE, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_bitfield, /* complain_on_overflow */
370 ppc64_elf_brtaken_reloc, /* special_function */
371 "R_PPC64_ADDR14_BRNTAKEN",/* name */
372 FALSE, /* partial_inplace */
373 0, /* src_mask */
374 0x0000fffc, /* dst_mask */
375 FALSE), /* pcrel_offset */
376
377 /* A relative 26 bit branch; the lower two bits must be zero. */
378 HOWTO (R_PPC64_REL24, /* type */
379 0, /* rightshift */
380 2, /* size (0 = byte, 1 = short, 2 = long) */
381 26, /* bitsize */
382 TRUE, /* pc_relative */
383 0, /* bitpos */
384 complain_overflow_signed, /* complain_on_overflow */
385 ppc64_elf_branch_reloc, /* special_function */
386 "R_PPC64_REL24", /* name */
387 FALSE, /* partial_inplace */
388 0, /* src_mask */
389 0x03fffffc, /* dst_mask */
390 TRUE), /* pcrel_offset */
391
392 /* A relative 16 bit branch; the lower two bits must be zero. */
393 HOWTO (R_PPC64_REL14, /* type */
394 0, /* rightshift */
395 2, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 TRUE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 ppc64_elf_branch_reloc, /* special_function */
401 "R_PPC64_REL14", /* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0x0000fffc, /* dst_mask */
405 TRUE), /* pcrel_offset */
406
407 /* A relative 16 bit branch. Bit 10 should be set to indicate that
408 the branch is expected to be taken. The lower two bits must be
409 zero. */
410 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
411 0, /* rightshift */
412 2, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 TRUE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 ppc64_elf_brtaken_reloc, /* special_function */
418 "R_PPC64_REL14_BRTAKEN", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0x0000fffc, /* dst_mask */
422 TRUE), /* pcrel_offset */
423
424 /* A relative 16 bit branch. Bit 10 should be set to indicate that
425 the branch is not expected to be taken. The lower two bits must
426 be zero. */
427 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
428 0, /* rightshift */
429 2, /* size (0 = byte, 1 = short, 2 = long) */
430 16, /* bitsize */
431 TRUE, /* pc_relative */
432 0, /* bitpos */
433 complain_overflow_signed, /* complain_on_overflow */
434 ppc64_elf_brtaken_reloc, /* special_function */
435 "R_PPC64_REL14_BRNTAKEN",/* name */
436 FALSE, /* partial_inplace */
437 0, /* src_mask */
438 0x0000fffc, /* dst_mask */
439 TRUE), /* pcrel_offset */
440
441 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
442 symbol. */
443 HOWTO (R_PPC64_GOT16, /* type */
444 0, /* rightshift */
445 1, /* size (0 = byte, 1 = short, 2 = long) */
446 16, /* bitsize */
447 FALSE, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_signed, /* complain_on_overflow */
450 ppc64_elf_unhandled_reloc, /* special_function */
451 "R_PPC64_GOT16", /* name */
452 FALSE, /* partial_inplace */
453 0, /* src_mask */
454 0xffff, /* dst_mask */
455 FALSE), /* pcrel_offset */
456
457 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
458 the symbol. */
459 HOWTO (R_PPC64_GOT16_LO, /* type */
460 0, /* rightshift */
461 1, /* size (0 = byte, 1 = short, 2 = long) */
462 16, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_dont, /* complain_on_overflow */
466 ppc64_elf_unhandled_reloc, /* special_function */
467 "R_PPC64_GOT16_LO", /* name */
468 FALSE, /* partial_inplace */
469 0, /* src_mask */
470 0xffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
474 the symbol. */
475 HOWTO (R_PPC64_GOT16_HI, /* type */
476 16, /* rightshift */
477 1, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 FALSE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_dont,/* complain_on_overflow */
482 ppc64_elf_unhandled_reloc, /* special_function */
483 "R_PPC64_GOT16_HI", /* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0xffff, /* dst_mask */
487 FALSE), /* pcrel_offset */
488
489 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
490 the symbol. */
491 HOWTO (R_PPC64_GOT16_HA, /* type */
492 16, /* rightshift */
493 1, /* size (0 = byte, 1 = short, 2 = long) */
494 16, /* bitsize */
495 FALSE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_dont,/* complain_on_overflow */
498 ppc64_elf_unhandled_reloc, /* special_function */
499 "R_PPC64_GOT16_HA", /* name */
500 FALSE, /* partial_inplace */
501 0, /* src_mask */
502 0xffff, /* dst_mask */
503 FALSE), /* pcrel_offset */
504
505 /* This is used only by the dynamic linker. The symbol should exist
506 both in the object being run and in some shared library. The
507 dynamic linker copies the data addressed by the symbol from the
508 shared library into the object, because the object being
509 run has to have the data at some particular address. */
510 HOWTO (R_PPC64_COPY, /* type */
511 0, /* rightshift */
512 0, /* this one is variable size */
513 0, /* bitsize */
514 FALSE, /* pc_relative */
515 0, /* bitpos */
516 complain_overflow_dont, /* complain_on_overflow */
517 ppc64_elf_unhandled_reloc, /* special_function */
518 "R_PPC64_COPY", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 0, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Like R_PPC64_ADDR64, but used when setting global offset table
525 entries. */
526 HOWTO (R_PPC64_GLOB_DAT, /* type */
527 0, /* rightshift */
528 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
529 64, /* bitsize */
530 FALSE, /* pc_relative */
531 0, /* bitpos */
532 complain_overflow_dont, /* complain_on_overflow */
533 ppc64_elf_unhandled_reloc, /* special_function */
534 "R_PPC64_GLOB_DAT", /* name */
535 FALSE, /* partial_inplace */
536 0, /* src_mask */
537 ONES (64), /* dst_mask */
538 FALSE), /* pcrel_offset */
539
540 /* Created by the link editor. Marks a procedure linkage table
541 entry for a symbol. */
542 HOWTO (R_PPC64_JMP_SLOT, /* type */
543 0, /* rightshift */
544 0, /* size (0 = byte, 1 = short, 2 = long) */
545 0, /* bitsize */
546 FALSE, /* pc_relative */
547 0, /* bitpos */
548 complain_overflow_dont, /* complain_on_overflow */
549 ppc64_elf_unhandled_reloc, /* special_function */
550 "R_PPC64_JMP_SLOT", /* name */
551 FALSE, /* partial_inplace */
552 0, /* src_mask */
553 0, /* dst_mask */
554 FALSE), /* pcrel_offset */
555
556 /* Used only by the dynamic linker. When the object is run, this
557 doubleword64 is set to the load address of the object, plus the
558 addend. */
559 HOWTO (R_PPC64_RELATIVE, /* type */
560 0, /* rightshift */
561 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
562 64, /* bitsize */
563 FALSE, /* pc_relative */
564 0, /* bitpos */
565 complain_overflow_dont, /* complain_on_overflow */
566 bfd_elf_generic_reloc, /* special_function */
567 "R_PPC64_RELATIVE", /* name */
568 FALSE, /* partial_inplace */
569 0, /* src_mask */
570 ONES (64), /* dst_mask */
571 FALSE), /* pcrel_offset */
572
573 /* Like R_PPC64_ADDR32, but may be unaligned. */
574 HOWTO (R_PPC64_UADDR32, /* type */
575 0, /* rightshift */
576 2, /* size (0 = byte, 1 = short, 2 = long) */
577 32, /* bitsize */
578 FALSE, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_bitfield, /* complain_on_overflow */
581 bfd_elf_generic_reloc, /* special_function */
582 "R_PPC64_UADDR32", /* name */
583 FALSE, /* partial_inplace */
584 0, /* src_mask */
585 0xffffffff, /* dst_mask */
586 FALSE), /* pcrel_offset */
587
588 /* Like R_PPC64_ADDR16, but may be unaligned. */
589 HOWTO (R_PPC64_UADDR16, /* type */
590 0, /* rightshift */
591 1, /* size (0 = byte, 1 = short, 2 = long) */
592 16, /* bitsize */
593 FALSE, /* pc_relative */
594 0, /* bitpos */
595 complain_overflow_bitfield, /* complain_on_overflow */
596 bfd_elf_generic_reloc, /* special_function */
597 "R_PPC64_UADDR16", /* name */
598 FALSE, /* partial_inplace */
599 0, /* src_mask */
600 0xffff, /* dst_mask */
601 FALSE), /* pcrel_offset */
602
603 /* 32-bit PC relative. */
604 HOWTO (R_PPC64_REL32, /* type */
605 0, /* rightshift */
606 2, /* size (0 = byte, 1 = short, 2 = long) */
607 32, /* bitsize */
608 TRUE, /* pc_relative */
609 0, /* bitpos */
610 /* FIXME: Verify. Was complain_overflow_bitfield. */
611 complain_overflow_signed, /* complain_on_overflow */
612 bfd_elf_generic_reloc, /* special_function */
613 "R_PPC64_REL32", /* name */
614 FALSE, /* partial_inplace */
615 0, /* src_mask */
616 0xffffffff, /* dst_mask */
617 TRUE), /* pcrel_offset */
618
619 /* 32-bit relocation to the symbol's procedure linkage table. */
620 HOWTO (R_PPC64_PLT32, /* type */
621 0, /* rightshift */
622 2, /* size (0 = byte, 1 = short, 2 = long) */
623 32, /* bitsize */
624 FALSE, /* pc_relative */
625 0, /* bitpos */
626 complain_overflow_bitfield, /* complain_on_overflow */
627 ppc64_elf_unhandled_reloc, /* special_function */
628 "R_PPC64_PLT32", /* name */
629 FALSE, /* partial_inplace */
630 0, /* src_mask */
631 0xffffffff, /* dst_mask */
632 FALSE), /* pcrel_offset */
633
634 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
635 FIXME: R_PPC64_PLTREL32 not supported. */
636 HOWTO (R_PPC64_PLTREL32, /* type */
637 0, /* rightshift */
638 2, /* size (0 = byte, 1 = short, 2 = long) */
639 32, /* bitsize */
640 TRUE, /* pc_relative */
641 0, /* bitpos */
642 complain_overflow_signed, /* complain_on_overflow */
643 bfd_elf_generic_reloc, /* special_function */
644 "R_PPC64_PLTREL32", /* name */
645 FALSE, /* partial_inplace */
646 0, /* src_mask */
647 0xffffffff, /* dst_mask */
648 TRUE), /* pcrel_offset */
649
650 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
651 the symbol. */
652 HOWTO (R_PPC64_PLT16_LO, /* type */
653 0, /* rightshift */
654 1, /* size (0 = byte, 1 = short, 2 = long) */
655 16, /* bitsize */
656 FALSE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_dont, /* complain_on_overflow */
659 ppc64_elf_unhandled_reloc, /* special_function */
660 "R_PPC64_PLT16_LO", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffff, /* dst_mask */
664 FALSE), /* pcrel_offset */
665
666 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
667 the symbol. */
668 HOWTO (R_PPC64_PLT16_HI, /* type */
669 16, /* rightshift */
670 1, /* size (0 = byte, 1 = short, 2 = long) */
671 16, /* bitsize */
672 FALSE, /* pc_relative */
673 0, /* bitpos */
674 complain_overflow_dont, /* complain_on_overflow */
675 ppc64_elf_unhandled_reloc, /* special_function */
676 "R_PPC64_PLT16_HI", /* name */
677 FALSE, /* partial_inplace */
678 0, /* src_mask */
679 0xffff, /* dst_mask */
680 FALSE), /* pcrel_offset */
681
682 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
683 the symbol. */
684 HOWTO (R_PPC64_PLT16_HA, /* type */
685 16, /* rightshift */
686 1, /* size (0 = byte, 1 = short, 2 = long) */
687 16, /* bitsize */
688 FALSE, /* pc_relative */
689 0, /* bitpos */
690 complain_overflow_dont, /* complain_on_overflow */
691 ppc64_elf_unhandled_reloc, /* special_function */
692 "R_PPC64_PLT16_HA", /* name */
693 FALSE, /* partial_inplace */
694 0, /* src_mask */
695 0xffff, /* dst_mask */
696 FALSE), /* pcrel_offset */
697
698 /* 16-bit section relative relocation. */
699 HOWTO (R_PPC64_SECTOFF, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_bitfield, /* complain_on_overflow */
706 ppc64_elf_sectoff_reloc, /* special_function */
707 "R_PPC64_SECTOFF", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* Like R_PPC64_SECTOFF, but no overflow warning. */
714 HOWTO (R_PPC64_SECTOFF_LO, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_dont, /* complain_on_overflow */
721 ppc64_elf_sectoff_reloc, /* special_function */
722 "R_PPC64_SECTOFF_LO", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit upper half section relative relocation. */
729 HOWTO (R_PPC64_SECTOFF_HI, /* type */
730 16, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 ppc64_elf_sectoff_reloc, /* special_function */
737 "R_PPC64_SECTOFF_HI", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half adjusted section relative relocation. */
744 HOWTO (R_PPC64_SECTOFF_HA, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 ppc64_elf_sectoff_ha_reloc, /* special_function */
752 "R_PPC64_SECTOFF_HA", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* Like R_PPC64_REL24 without touching the two least significant bits. */
759 HOWTO (R_PPC64_REL30, /* type */
760 2, /* rightshift */
761 2, /* size (0 = byte, 1 = short, 2 = long) */
762 30, /* bitsize */
763 TRUE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 bfd_elf_generic_reloc, /* special_function */
767 "R_PPC64_REL30", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xfffffffc, /* dst_mask */
771 TRUE), /* pcrel_offset */
772
773 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
774
775 /* A standard 64-bit relocation. */
776 HOWTO (R_PPC64_ADDR64, /* type */
777 0, /* rightshift */
778 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
779 64, /* bitsize */
780 FALSE, /* pc_relative */
781 0, /* bitpos */
782 complain_overflow_dont, /* complain_on_overflow */
783 bfd_elf_generic_reloc, /* special_function */
784 "R_PPC64_ADDR64", /* name */
785 FALSE, /* partial_inplace */
786 0, /* src_mask */
787 ONES (64), /* dst_mask */
788 FALSE), /* pcrel_offset */
789
790 /* The bits 32-47 of an address. */
791 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
792 32, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_dont, /* complain_on_overflow */
798 bfd_elf_generic_reloc, /* special_function */
799 "R_PPC64_ADDR16_HIGHER", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* The bits 32-47 of an address, plus 1 if the contents of the low
806 16 bits, treated as a signed number, is negative. */
807 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
808 32, /* rightshift */
809 1, /* size (0 = byte, 1 = short, 2 = long) */
810 16, /* bitsize */
811 FALSE, /* pc_relative */
812 0, /* bitpos */
813 complain_overflow_dont, /* complain_on_overflow */
814 ppc64_elf_ha_reloc, /* special_function */
815 "R_PPC64_ADDR16_HIGHERA", /* name */
816 FALSE, /* partial_inplace */
817 0, /* src_mask */
818 0xffff, /* dst_mask */
819 FALSE), /* pcrel_offset */
820
821 /* The bits 48-63 of an address. */
822 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
823 48, /* rightshift */
824 1, /* size (0 = byte, 1 = short, 2 = long) */
825 16, /* bitsize */
826 FALSE, /* pc_relative */
827 0, /* bitpos */
828 complain_overflow_dont, /* complain_on_overflow */
829 bfd_elf_generic_reloc, /* special_function */
830 "R_PPC64_ADDR16_HIGHEST", /* name */
831 FALSE, /* partial_inplace */
832 0, /* src_mask */
833 0xffff, /* dst_mask */
834 FALSE), /* pcrel_offset */
835
836 /* The bits 48-63 of an address, plus 1 if the contents of the low
837 16 bits, treated as a signed number, is negative. */
838 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
839 48, /* rightshift */
840 1, /* size (0 = byte, 1 = short, 2 = long) */
841 16, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 ppc64_elf_ha_reloc, /* special_function */
846 "R_PPC64_ADDR16_HIGHESTA", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 0xffff, /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 /* Like ADDR64, but may be unaligned. */
853 HOWTO (R_PPC64_UADDR64, /* type */
854 0, /* rightshift */
855 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
856 64, /* bitsize */
857 FALSE, /* pc_relative */
858 0, /* bitpos */
859 complain_overflow_dont, /* complain_on_overflow */
860 bfd_elf_generic_reloc, /* special_function */
861 "R_PPC64_UADDR64", /* name */
862 FALSE, /* partial_inplace */
863 0, /* src_mask */
864 ONES (64), /* dst_mask */
865 FALSE), /* pcrel_offset */
866
867 /* 64-bit relative relocation. */
868 HOWTO (R_PPC64_REL64, /* type */
869 0, /* rightshift */
870 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
871 64, /* bitsize */
872 TRUE, /* pc_relative */
873 0, /* bitpos */
874 complain_overflow_dont, /* complain_on_overflow */
875 bfd_elf_generic_reloc, /* special_function */
876 "R_PPC64_REL64", /* name */
877 FALSE, /* partial_inplace */
878 0, /* src_mask */
879 ONES (64), /* dst_mask */
880 TRUE), /* pcrel_offset */
881
882 /* 64-bit relocation to the symbol's procedure linkage table. */
883 HOWTO (R_PPC64_PLT64, /* type */
884 0, /* rightshift */
885 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
886 64, /* bitsize */
887 FALSE, /* pc_relative */
888 0, /* bitpos */
889 complain_overflow_dont, /* complain_on_overflow */
890 ppc64_elf_unhandled_reloc, /* special_function */
891 "R_PPC64_PLT64", /* name */
892 FALSE, /* partial_inplace */
893 0, /* src_mask */
894 ONES (64), /* dst_mask */
895 FALSE), /* pcrel_offset */
896
897 /* 64-bit PC relative relocation to the symbol's procedure linkage
898 table. */
899 /* FIXME: R_PPC64_PLTREL64 not supported. */
900 HOWTO (R_PPC64_PLTREL64, /* type */
901 0, /* rightshift */
902 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
903 64, /* bitsize */
904 TRUE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_dont, /* complain_on_overflow */
907 ppc64_elf_unhandled_reloc, /* special_function */
908 "R_PPC64_PLTREL64", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 ONES (64), /* dst_mask */
912 TRUE), /* pcrel_offset */
913
914 /* 16 bit TOC-relative relocation. */
915
916 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
917 HOWTO (R_PPC64_TOC16, /* type */
918 0, /* rightshift */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
920 16, /* bitsize */
921 FALSE, /* pc_relative */
922 0, /* bitpos */
923 complain_overflow_signed, /* complain_on_overflow */
924 ppc64_elf_toc_reloc, /* special_function */
925 "R_PPC64_TOC16", /* name */
926 FALSE, /* partial_inplace */
927 0, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE), /* pcrel_offset */
930
931 /* 16 bit TOC-relative relocation without overflow. */
932
933 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
934 HOWTO (R_PPC64_TOC16_LO, /* type */
935 0, /* rightshift */
936 1, /* size (0 = byte, 1 = short, 2 = long) */
937 16, /* bitsize */
938 FALSE, /* pc_relative */
939 0, /* bitpos */
940 complain_overflow_dont, /* complain_on_overflow */
941 ppc64_elf_toc_reloc, /* special_function */
942 "R_PPC64_TOC16_LO", /* name */
943 FALSE, /* partial_inplace */
944 0, /* src_mask */
945 0xffff, /* dst_mask */
946 FALSE), /* pcrel_offset */
947
948 /* 16 bit TOC-relative relocation, high 16 bits. */
949
950 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
951 HOWTO (R_PPC64_TOC16_HI, /* type */
952 16, /* rightshift */
953 1, /* size (0 = byte, 1 = short, 2 = long) */
954 16, /* bitsize */
955 FALSE, /* pc_relative */
956 0, /* bitpos */
957 complain_overflow_dont, /* complain_on_overflow */
958 ppc64_elf_toc_reloc, /* special_function */
959 "R_PPC64_TOC16_HI", /* name */
960 FALSE, /* partial_inplace */
961 0, /* src_mask */
962 0xffff, /* dst_mask */
963 FALSE), /* pcrel_offset */
964
965 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
966 contents of the low 16 bits, treated as a signed number, is
967 negative. */
968
969 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
970 HOWTO (R_PPC64_TOC16_HA, /* type */
971 16, /* rightshift */
972 1, /* size (0 = byte, 1 = short, 2 = long) */
973 16, /* bitsize */
974 FALSE, /* pc_relative */
975 0, /* bitpos */
976 complain_overflow_dont, /* complain_on_overflow */
977 ppc64_elf_toc_ha_reloc, /* special_function */
978 "R_PPC64_TOC16_HA", /* name */
979 FALSE, /* partial_inplace */
980 0, /* src_mask */
981 0xffff, /* dst_mask */
982 FALSE), /* pcrel_offset */
983
984 /* 64-bit relocation; insert value of TOC base (.TOC.). */
985
986 /* R_PPC64_TOC 51 doubleword64 .TOC. */
987 HOWTO (R_PPC64_TOC, /* type */
988 0, /* rightshift */
989 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
990 64, /* bitsize */
991 FALSE, /* pc_relative */
992 0, /* bitpos */
993 complain_overflow_bitfield, /* complain_on_overflow */
994 ppc64_elf_toc64_reloc, /* special_function */
995 "R_PPC64_TOC", /* name */
996 FALSE, /* partial_inplace */
997 0, /* src_mask */
998 ONES (64), /* dst_mask */
999 FALSE), /* pcrel_offset */
1000
1001 /* Like R_PPC64_GOT16, but also informs the link editor that the
1002 value to relocate may (!) refer to a PLT entry which the link
1003 editor (a) may replace with the symbol value. If the link editor
1004 is unable to fully resolve the symbol, it may (b) create a PLT
1005 entry and store the address to the new PLT entry in the GOT.
1006 This permits lazy resolution of function symbols at run time.
1007 The link editor may also skip all of this and just (c) emit a
1008 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1009 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1010 HOWTO (R_PPC64_PLTGOT16, /* type */
1011 0, /* rightshift */
1012 1, /* size (0 = byte, 1 = short, 2 = long) */
1013 16, /* bitsize */
1014 FALSE, /* pc_relative */
1015 0, /* bitpos */
1016 complain_overflow_signed, /* complain_on_overflow */
1017 ppc64_elf_unhandled_reloc, /* special_function */
1018 "R_PPC64_PLTGOT16", /* name */
1019 FALSE, /* partial_inplace */
1020 0, /* src_mask */
1021 0xffff, /* dst_mask */
1022 FALSE), /* pcrel_offset */
1023
1024 /* Like R_PPC64_PLTGOT16, but without overflow. */
1025 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1026 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1027 0, /* rightshift */
1028 1, /* size (0 = byte, 1 = short, 2 = long) */
1029 16, /* bitsize */
1030 FALSE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont, /* complain_on_overflow */
1033 ppc64_elf_unhandled_reloc, /* special_function */
1034 "R_PPC64_PLTGOT16_LO", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 0xffff, /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1041 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1042 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1043 16, /* rightshift */
1044 1, /* size (0 = byte, 1 = short, 2 = long) */
1045 16, /* bitsize */
1046 FALSE, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_dont, /* complain_on_overflow */
1049 ppc64_elf_unhandled_reloc, /* special_function */
1050 "R_PPC64_PLTGOT16_HI", /* name */
1051 FALSE, /* partial_inplace */
1052 0, /* src_mask */
1053 0xffff, /* dst_mask */
1054 FALSE), /* pcrel_offset */
1055
1056 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1057 1 if the contents of the low 16 bits, treated as a signed number,
1058 is negative. */
1059 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1060 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1061 16, /* rightshift */
1062 1, /* size (0 = byte, 1 = short, 2 = long) */
1063 16, /* bitsize */
1064 FALSE, /* pc_relative */
1065 0, /* bitpos */
1066 complain_overflow_dont,/* complain_on_overflow */
1067 ppc64_elf_unhandled_reloc, /* special_function */
1068 "R_PPC64_PLTGOT16_HA", /* name */
1069 FALSE, /* partial_inplace */
1070 0, /* src_mask */
1071 0xffff, /* dst_mask */
1072 FALSE), /* pcrel_offset */
1073
1074 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1075 HOWTO (R_PPC64_ADDR16_DS, /* type */
1076 0, /* rightshift */
1077 1, /* size (0 = byte, 1 = short, 2 = long) */
1078 16, /* bitsize */
1079 FALSE, /* pc_relative */
1080 0, /* bitpos */
1081 complain_overflow_bitfield, /* complain_on_overflow */
1082 bfd_elf_generic_reloc, /* special_function */
1083 "R_PPC64_ADDR16_DS", /* name */
1084 FALSE, /* partial_inplace */
1085 0, /* src_mask */
1086 0xfffc, /* dst_mask */
1087 FALSE), /* pcrel_offset */
1088
1089 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1090 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1091 0, /* rightshift */
1092 1, /* size (0 = byte, 1 = short, 2 = long) */
1093 16, /* bitsize */
1094 FALSE, /* pc_relative */
1095 0, /* bitpos */
1096 complain_overflow_dont,/* complain_on_overflow */
1097 bfd_elf_generic_reloc, /* special_function */
1098 "R_PPC64_ADDR16_LO_DS",/* name */
1099 FALSE, /* partial_inplace */
1100 0, /* src_mask */
1101 0xfffc, /* dst_mask */
1102 FALSE), /* pcrel_offset */
1103
1104 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1105 HOWTO (R_PPC64_GOT16_DS, /* type */
1106 0, /* rightshift */
1107 1, /* size (0 = byte, 1 = short, 2 = long) */
1108 16, /* bitsize */
1109 FALSE, /* pc_relative */
1110 0, /* bitpos */
1111 complain_overflow_signed, /* complain_on_overflow */
1112 ppc64_elf_unhandled_reloc, /* special_function */
1113 "R_PPC64_GOT16_DS", /* name */
1114 FALSE, /* partial_inplace */
1115 0, /* src_mask */
1116 0xfffc, /* dst_mask */
1117 FALSE), /* pcrel_offset */
1118
1119 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1120 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1121 0, /* rightshift */
1122 1, /* size (0 = byte, 1 = short, 2 = long) */
1123 16, /* bitsize */
1124 FALSE, /* pc_relative */
1125 0, /* bitpos */
1126 complain_overflow_dont, /* complain_on_overflow */
1127 ppc64_elf_unhandled_reloc, /* special_function */
1128 "R_PPC64_GOT16_LO_DS", /* name */
1129 FALSE, /* partial_inplace */
1130 0, /* src_mask */
1131 0xfffc, /* dst_mask */
1132 FALSE), /* pcrel_offset */
1133
1134 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1135 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1136 0, /* rightshift */
1137 1, /* size (0 = byte, 1 = short, 2 = long) */
1138 16, /* bitsize */
1139 FALSE, /* pc_relative */
1140 0, /* bitpos */
1141 complain_overflow_dont, /* complain_on_overflow */
1142 ppc64_elf_unhandled_reloc, /* special_function */
1143 "R_PPC64_PLT16_LO_DS", /* name */
1144 FALSE, /* partial_inplace */
1145 0, /* src_mask */
1146 0xfffc, /* dst_mask */
1147 FALSE), /* pcrel_offset */
1148
1149 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1150 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1151 0, /* rightshift */
1152 1, /* size (0 = byte, 1 = short, 2 = long) */
1153 16, /* bitsize */
1154 FALSE, /* pc_relative */
1155 0, /* bitpos */
1156 complain_overflow_bitfield, /* complain_on_overflow */
1157 ppc64_elf_sectoff_reloc, /* special_function */
1158 "R_PPC64_SECTOFF_DS", /* name */
1159 FALSE, /* partial_inplace */
1160 0, /* src_mask */
1161 0xfffc, /* dst_mask */
1162 FALSE), /* pcrel_offset */
1163
1164 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1165 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1166 0, /* rightshift */
1167 1, /* size (0 = byte, 1 = short, 2 = long) */
1168 16, /* bitsize */
1169 FALSE, /* pc_relative */
1170 0, /* bitpos */
1171 complain_overflow_dont, /* complain_on_overflow */
1172 ppc64_elf_sectoff_reloc, /* special_function */
1173 "R_PPC64_SECTOFF_LO_DS",/* name */
1174 FALSE, /* partial_inplace */
1175 0, /* src_mask */
1176 0xfffc, /* dst_mask */
1177 FALSE), /* pcrel_offset */
1178
1179 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1180 HOWTO (R_PPC64_TOC16_DS, /* type */
1181 0, /* rightshift */
1182 1, /* size (0 = byte, 1 = short, 2 = long) */
1183 16, /* bitsize */
1184 FALSE, /* pc_relative */
1185 0, /* bitpos */
1186 complain_overflow_signed, /* complain_on_overflow */
1187 ppc64_elf_toc_reloc, /* special_function */
1188 "R_PPC64_TOC16_DS", /* name */
1189 FALSE, /* partial_inplace */
1190 0, /* src_mask */
1191 0xfffc, /* dst_mask */
1192 FALSE), /* pcrel_offset */
1193
1194 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1195 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1196 0, /* rightshift */
1197 1, /* size (0 = byte, 1 = short, 2 = long) */
1198 16, /* bitsize */
1199 FALSE, /* pc_relative */
1200 0, /* bitpos */
1201 complain_overflow_dont, /* complain_on_overflow */
1202 ppc64_elf_toc_reloc, /* special_function */
1203 "R_PPC64_TOC16_LO_DS", /* name */
1204 FALSE, /* partial_inplace */
1205 0, /* src_mask */
1206 0xfffc, /* dst_mask */
1207 FALSE), /* pcrel_offset */
1208
1209 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1210 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1211 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1212 0, /* rightshift */
1213 1, /* size (0 = byte, 1 = short, 2 = long) */
1214 16, /* bitsize */
1215 FALSE, /* pc_relative */
1216 0, /* bitpos */
1217 complain_overflow_signed, /* complain_on_overflow */
1218 ppc64_elf_unhandled_reloc, /* special_function */
1219 "R_PPC64_PLTGOT16_DS", /* name */
1220 FALSE, /* partial_inplace */
1221 0, /* src_mask */
1222 0xfffc, /* dst_mask */
1223 FALSE), /* pcrel_offset */
1224
1225 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1226 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1227 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1228 0, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont, /* complain_on_overflow */
1234 ppc64_elf_unhandled_reloc, /* special_function */
1235 "R_PPC64_PLTGOT16_LO_DS",/* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xfffc, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* Marker relocs for TLS. */
1242 HOWTO (R_PPC64_TLS,
1243 0, /* rightshift */
1244 2, /* size (0 = byte, 1 = short, 2 = long) */
1245 32, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 bfd_elf_generic_reloc, /* special_function */
1250 "R_PPC64_TLS", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 0, /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 HOWTO (R_PPC64_TLSGD,
1257 0, /* rightshift */
1258 2, /* size (0 = byte, 1 = short, 2 = long) */
1259 32, /* bitsize */
1260 FALSE, /* pc_relative */
1261 0, /* bitpos */
1262 complain_overflow_dont, /* complain_on_overflow */
1263 bfd_elf_generic_reloc, /* special_function */
1264 "R_PPC64_TLSGD", /* name */
1265 FALSE, /* partial_inplace */
1266 0, /* src_mask */
1267 0, /* dst_mask */
1268 FALSE), /* pcrel_offset */
1269
1270 HOWTO (R_PPC64_TLSLD,
1271 0, /* rightshift */
1272 2, /* size (0 = byte, 1 = short, 2 = long) */
1273 32, /* bitsize */
1274 FALSE, /* pc_relative */
1275 0, /* bitpos */
1276 complain_overflow_dont, /* complain_on_overflow */
1277 bfd_elf_generic_reloc, /* special_function */
1278 "R_PPC64_TLSLD", /* name */
1279 FALSE, /* partial_inplace */
1280 0, /* src_mask */
1281 0, /* dst_mask */
1282 FALSE), /* pcrel_offset */
1283
1284 /* Computes the load module index of the load module that contains the
1285 definition of its TLS sym. */
1286 HOWTO (R_PPC64_DTPMOD64,
1287 0, /* rightshift */
1288 4, /* size (0 = byte, 1 = short, 2 = long) */
1289 64, /* bitsize */
1290 FALSE, /* pc_relative */
1291 0, /* bitpos */
1292 complain_overflow_dont, /* complain_on_overflow */
1293 ppc64_elf_unhandled_reloc, /* special_function */
1294 "R_PPC64_DTPMOD64", /* name */
1295 FALSE, /* partial_inplace */
1296 0, /* src_mask */
1297 ONES (64), /* dst_mask */
1298 FALSE), /* pcrel_offset */
1299
1300 /* Computes a dtv-relative displacement, the difference between the value
1301 of sym+add and the base address of the thread-local storage block that
1302 contains the definition of sym, minus 0x8000. */
1303 HOWTO (R_PPC64_DTPREL64,
1304 0, /* rightshift */
1305 4, /* size (0 = byte, 1 = short, 2 = long) */
1306 64, /* bitsize */
1307 FALSE, /* pc_relative */
1308 0, /* bitpos */
1309 complain_overflow_dont, /* complain_on_overflow */
1310 ppc64_elf_unhandled_reloc, /* special_function */
1311 "R_PPC64_DTPREL64", /* name */
1312 FALSE, /* partial_inplace */
1313 0, /* src_mask */
1314 ONES (64), /* dst_mask */
1315 FALSE), /* pcrel_offset */
1316
1317 /* A 16 bit dtprel reloc. */
1318 HOWTO (R_PPC64_DTPREL16,
1319 0, /* rightshift */
1320 1, /* size (0 = byte, 1 = short, 2 = long) */
1321 16, /* bitsize */
1322 FALSE, /* pc_relative */
1323 0, /* bitpos */
1324 complain_overflow_signed, /* complain_on_overflow */
1325 ppc64_elf_unhandled_reloc, /* special_function */
1326 "R_PPC64_DTPREL16", /* name */
1327 FALSE, /* partial_inplace */
1328 0, /* src_mask */
1329 0xffff, /* dst_mask */
1330 FALSE), /* pcrel_offset */
1331
1332 /* Like DTPREL16, but no overflow. */
1333 HOWTO (R_PPC64_DTPREL16_LO,
1334 0, /* rightshift */
1335 1, /* size (0 = byte, 1 = short, 2 = long) */
1336 16, /* bitsize */
1337 FALSE, /* pc_relative */
1338 0, /* bitpos */
1339 complain_overflow_dont, /* complain_on_overflow */
1340 ppc64_elf_unhandled_reloc, /* special_function */
1341 "R_PPC64_DTPREL16_LO", /* name */
1342 FALSE, /* partial_inplace */
1343 0, /* src_mask */
1344 0xffff, /* dst_mask */
1345 FALSE), /* pcrel_offset */
1346
1347 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1348 HOWTO (R_PPC64_DTPREL16_HI,
1349 16, /* rightshift */
1350 1, /* size (0 = byte, 1 = short, 2 = long) */
1351 16, /* bitsize */
1352 FALSE, /* pc_relative */
1353 0, /* bitpos */
1354 complain_overflow_dont, /* complain_on_overflow */
1355 ppc64_elf_unhandled_reloc, /* special_function */
1356 "R_PPC64_DTPREL16_HI", /* name */
1357 FALSE, /* partial_inplace */
1358 0, /* src_mask */
1359 0xffff, /* dst_mask */
1360 FALSE), /* pcrel_offset */
1361
1362 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1363 HOWTO (R_PPC64_DTPREL16_HA,
1364 16, /* rightshift */
1365 1, /* size (0 = byte, 1 = short, 2 = long) */
1366 16, /* bitsize */
1367 FALSE, /* pc_relative */
1368 0, /* bitpos */
1369 complain_overflow_dont, /* complain_on_overflow */
1370 ppc64_elf_unhandled_reloc, /* special_function */
1371 "R_PPC64_DTPREL16_HA", /* name */
1372 FALSE, /* partial_inplace */
1373 0, /* src_mask */
1374 0xffff, /* dst_mask */
1375 FALSE), /* pcrel_offset */
1376
1377 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1378 HOWTO (R_PPC64_DTPREL16_HIGHER,
1379 32, /* rightshift */
1380 1, /* size (0 = byte, 1 = short, 2 = long) */
1381 16, /* bitsize */
1382 FALSE, /* pc_relative */
1383 0, /* bitpos */
1384 complain_overflow_dont, /* complain_on_overflow */
1385 ppc64_elf_unhandled_reloc, /* special_function */
1386 "R_PPC64_DTPREL16_HIGHER", /* name */
1387 FALSE, /* partial_inplace */
1388 0, /* src_mask */
1389 0xffff, /* dst_mask */
1390 FALSE), /* pcrel_offset */
1391
1392 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1393 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1394 32, /* rightshift */
1395 1, /* size (0 = byte, 1 = short, 2 = long) */
1396 16, /* bitsize */
1397 FALSE, /* pc_relative */
1398 0, /* bitpos */
1399 complain_overflow_dont, /* complain_on_overflow */
1400 ppc64_elf_unhandled_reloc, /* special_function */
1401 "R_PPC64_DTPREL16_HIGHERA", /* name */
1402 FALSE, /* partial_inplace */
1403 0, /* src_mask */
1404 0xffff, /* dst_mask */
1405 FALSE), /* pcrel_offset */
1406
1407 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1408 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1409 48, /* rightshift */
1410 1, /* size (0 = byte, 1 = short, 2 = long) */
1411 16, /* bitsize */
1412 FALSE, /* pc_relative */
1413 0, /* bitpos */
1414 complain_overflow_dont, /* complain_on_overflow */
1415 ppc64_elf_unhandled_reloc, /* special_function */
1416 "R_PPC64_DTPREL16_HIGHEST", /* name */
1417 FALSE, /* partial_inplace */
1418 0, /* src_mask */
1419 0xffff, /* dst_mask */
1420 FALSE), /* pcrel_offset */
1421
1422 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1423 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1424 48, /* rightshift */
1425 1, /* size (0 = byte, 1 = short, 2 = long) */
1426 16, /* bitsize */
1427 FALSE, /* pc_relative */
1428 0, /* bitpos */
1429 complain_overflow_dont, /* complain_on_overflow */
1430 ppc64_elf_unhandled_reloc, /* special_function */
1431 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1432 FALSE, /* partial_inplace */
1433 0, /* src_mask */
1434 0xffff, /* dst_mask */
1435 FALSE), /* pcrel_offset */
1436
1437 /* Like DTPREL16, but for insns with a DS field. */
1438 HOWTO (R_PPC64_DTPREL16_DS,
1439 0, /* rightshift */
1440 1, /* size (0 = byte, 1 = short, 2 = long) */
1441 16, /* bitsize */
1442 FALSE, /* pc_relative */
1443 0, /* bitpos */
1444 complain_overflow_signed, /* complain_on_overflow */
1445 ppc64_elf_unhandled_reloc, /* special_function */
1446 "R_PPC64_DTPREL16_DS", /* name */
1447 FALSE, /* partial_inplace */
1448 0, /* src_mask */
1449 0xfffc, /* dst_mask */
1450 FALSE), /* pcrel_offset */
1451
1452 /* Like DTPREL16_DS, but no overflow. */
1453 HOWTO (R_PPC64_DTPREL16_LO_DS,
1454 0, /* rightshift */
1455 1, /* size (0 = byte, 1 = short, 2 = long) */
1456 16, /* bitsize */
1457 FALSE, /* pc_relative */
1458 0, /* bitpos */
1459 complain_overflow_dont, /* complain_on_overflow */
1460 ppc64_elf_unhandled_reloc, /* special_function */
1461 "R_PPC64_DTPREL16_LO_DS", /* name */
1462 FALSE, /* partial_inplace */
1463 0, /* src_mask */
1464 0xfffc, /* dst_mask */
1465 FALSE), /* pcrel_offset */
1466
1467 /* Computes a tp-relative displacement, the difference between the value of
1468 sym+add and the value of the thread pointer (r13). */
1469 HOWTO (R_PPC64_TPREL64,
1470 0, /* rightshift */
1471 4, /* size (0 = byte, 1 = short, 2 = long) */
1472 64, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 ppc64_elf_unhandled_reloc, /* special_function */
1477 "R_PPC64_TPREL64", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 ONES (64), /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* A 16 bit tprel reloc. */
1484 HOWTO (R_PPC64_TPREL16,
1485 0, /* rightshift */
1486 1, /* size (0 = byte, 1 = short, 2 = long) */
1487 16, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_signed, /* complain_on_overflow */
1491 ppc64_elf_unhandled_reloc, /* special_function */
1492 "R_PPC64_TPREL16", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0xffff, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Like TPREL16, but no overflow. */
1499 HOWTO (R_PPC64_TPREL16_LO,
1500 0, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_dont, /* complain_on_overflow */
1506 ppc64_elf_unhandled_reloc, /* special_function */
1507 "R_PPC64_TPREL16_LO", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xffff, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Like TPREL16_LO, but next higher group of 16 bits. */
1514 HOWTO (R_PPC64_TPREL16_HI,
1515 16, /* rightshift */
1516 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 16, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_dont, /* complain_on_overflow */
1521 ppc64_elf_unhandled_reloc, /* special_function */
1522 "R_PPC64_TPREL16_HI", /* name */
1523 FALSE, /* partial_inplace */
1524 0, /* src_mask */
1525 0xffff, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 /* Like TPREL16_HI, but adjust for low 16 bits. */
1529 HOWTO (R_PPC64_TPREL16_HA,
1530 16, /* rightshift */
1531 1, /* size (0 = byte, 1 = short, 2 = long) */
1532 16, /* bitsize */
1533 FALSE, /* pc_relative */
1534 0, /* bitpos */
1535 complain_overflow_dont, /* complain_on_overflow */
1536 ppc64_elf_unhandled_reloc, /* special_function */
1537 "R_PPC64_TPREL16_HA", /* name */
1538 FALSE, /* partial_inplace */
1539 0, /* src_mask */
1540 0xffff, /* dst_mask */
1541 FALSE), /* pcrel_offset */
1542
1543 /* Like TPREL16_HI, but next higher group of 16 bits. */
1544 HOWTO (R_PPC64_TPREL16_HIGHER,
1545 32, /* rightshift */
1546 1, /* size (0 = byte, 1 = short, 2 = long) */
1547 16, /* bitsize */
1548 FALSE, /* pc_relative */
1549 0, /* bitpos */
1550 complain_overflow_dont, /* complain_on_overflow */
1551 ppc64_elf_unhandled_reloc, /* special_function */
1552 "R_PPC64_TPREL16_HIGHER", /* name */
1553 FALSE, /* partial_inplace */
1554 0, /* src_mask */
1555 0xffff, /* dst_mask */
1556 FALSE), /* pcrel_offset */
1557
1558 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1559 HOWTO (R_PPC64_TPREL16_HIGHERA,
1560 32, /* rightshift */
1561 1, /* size (0 = byte, 1 = short, 2 = long) */
1562 16, /* bitsize */
1563 FALSE, /* pc_relative */
1564 0, /* bitpos */
1565 complain_overflow_dont, /* complain_on_overflow */
1566 ppc64_elf_unhandled_reloc, /* special_function */
1567 "R_PPC64_TPREL16_HIGHERA", /* name */
1568 FALSE, /* partial_inplace */
1569 0, /* src_mask */
1570 0xffff, /* dst_mask */
1571 FALSE), /* pcrel_offset */
1572
1573 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1574 HOWTO (R_PPC64_TPREL16_HIGHEST,
1575 48, /* rightshift */
1576 1, /* size (0 = byte, 1 = short, 2 = long) */
1577 16, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_dont, /* complain_on_overflow */
1581 ppc64_elf_unhandled_reloc, /* special_function */
1582 "R_PPC64_TPREL16_HIGHEST", /* name */
1583 FALSE, /* partial_inplace */
1584 0, /* src_mask */
1585 0xffff, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1589 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1590 48, /* rightshift */
1591 1, /* size (0 = byte, 1 = short, 2 = long) */
1592 16, /* bitsize */
1593 FALSE, /* pc_relative */
1594 0, /* bitpos */
1595 complain_overflow_dont, /* complain_on_overflow */
1596 ppc64_elf_unhandled_reloc, /* special_function */
1597 "R_PPC64_TPREL16_HIGHESTA", /* name */
1598 FALSE, /* partial_inplace */
1599 0, /* src_mask */
1600 0xffff, /* dst_mask */
1601 FALSE), /* pcrel_offset */
1602
1603 /* Like TPREL16, but for insns with a DS field. */
1604 HOWTO (R_PPC64_TPREL16_DS,
1605 0, /* rightshift */
1606 1, /* size (0 = byte, 1 = short, 2 = long) */
1607 16, /* bitsize */
1608 FALSE, /* pc_relative */
1609 0, /* bitpos */
1610 complain_overflow_signed, /* complain_on_overflow */
1611 ppc64_elf_unhandled_reloc, /* special_function */
1612 "R_PPC64_TPREL16_DS", /* name */
1613 FALSE, /* partial_inplace */
1614 0, /* src_mask */
1615 0xfffc, /* dst_mask */
1616 FALSE), /* pcrel_offset */
1617
1618 /* Like TPREL16_DS, but no overflow. */
1619 HOWTO (R_PPC64_TPREL16_LO_DS,
1620 0, /* rightshift */
1621 1, /* size (0 = byte, 1 = short, 2 = long) */
1622 16, /* bitsize */
1623 FALSE, /* pc_relative */
1624 0, /* bitpos */
1625 complain_overflow_dont, /* complain_on_overflow */
1626 ppc64_elf_unhandled_reloc, /* special_function */
1627 "R_PPC64_TPREL16_LO_DS", /* name */
1628 FALSE, /* partial_inplace */
1629 0, /* src_mask */
1630 0xfffc, /* dst_mask */
1631 FALSE), /* pcrel_offset */
1632
1633 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1634 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1635 to the first entry relative to the TOC base (r2). */
1636 HOWTO (R_PPC64_GOT_TLSGD16,
1637 0, /* rightshift */
1638 1, /* size (0 = byte, 1 = short, 2 = long) */
1639 16, /* bitsize */
1640 FALSE, /* pc_relative */
1641 0, /* bitpos */
1642 complain_overflow_signed, /* complain_on_overflow */
1643 ppc64_elf_unhandled_reloc, /* special_function */
1644 "R_PPC64_GOT_TLSGD16", /* name */
1645 FALSE, /* partial_inplace */
1646 0, /* src_mask */
1647 0xffff, /* dst_mask */
1648 FALSE), /* pcrel_offset */
1649
1650 /* Like GOT_TLSGD16, but no overflow. */
1651 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1652 0, /* rightshift */
1653 1, /* size (0 = byte, 1 = short, 2 = long) */
1654 16, /* bitsize */
1655 FALSE, /* pc_relative */
1656 0, /* bitpos */
1657 complain_overflow_dont, /* complain_on_overflow */
1658 ppc64_elf_unhandled_reloc, /* special_function */
1659 "R_PPC64_GOT_TLSGD16_LO", /* name */
1660 FALSE, /* partial_inplace */
1661 0, /* src_mask */
1662 0xffff, /* dst_mask */
1663 FALSE), /* pcrel_offset */
1664
1665 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1666 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1667 16, /* rightshift */
1668 1, /* size (0 = byte, 1 = short, 2 = long) */
1669 16, /* bitsize */
1670 FALSE, /* pc_relative */
1671 0, /* bitpos */
1672 complain_overflow_dont, /* complain_on_overflow */
1673 ppc64_elf_unhandled_reloc, /* special_function */
1674 "R_PPC64_GOT_TLSGD16_HI", /* name */
1675 FALSE, /* partial_inplace */
1676 0, /* src_mask */
1677 0xffff, /* dst_mask */
1678 FALSE), /* pcrel_offset */
1679
1680 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1681 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1682 16, /* rightshift */
1683 1, /* size (0 = byte, 1 = short, 2 = long) */
1684 16, /* bitsize */
1685 FALSE, /* pc_relative */
1686 0, /* bitpos */
1687 complain_overflow_dont, /* complain_on_overflow */
1688 ppc64_elf_unhandled_reloc, /* special_function */
1689 "R_PPC64_GOT_TLSGD16_HA", /* name */
1690 FALSE, /* partial_inplace */
1691 0, /* src_mask */
1692 0xffff, /* dst_mask */
1693 FALSE), /* pcrel_offset */
1694
1695 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1696 with values (sym+add)@dtpmod and zero, and computes the offset to the
1697 first entry relative to the TOC base (r2). */
1698 HOWTO (R_PPC64_GOT_TLSLD16,
1699 0, /* rightshift */
1700 1, /* size (0 = byte, 1 = short, 2 = long) */
1701 16, /* bitsize */
1702 FALSE, /* pc_relative */
1703 0, /* bitpos */
1704 complain_overflow_signed, /* complain_on_overflow */
1705 ppc64_elf_unhandled_reloc, /* special_function */
1706 "R_PPC64_GOT_TLSLD16", /* name */
1707 FALSE, /* partial_inplace */
1708 0, /* src_mask */
1709 0xffff, /* dst_mask */
1710 FALSE), /* pcrel_offset */
1711
1712 /* Like GOT_TLSLD16, but no overflow. */
1713 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1714 0, /* rightshift */
1715 1, /* size (0 = byte, 1 = short, 2 = long) */
1716 16, /* bitsize */
1717 FALSE, /* pc_relative */
1718 0, /* bitpos */
1719 complain_overflow_dont, /* complain_on_overflow */
1720 ppc64_elf_unhandled_reloc, /* special_function */
1721 "R_PPC64_GOT_TLSLD16_LO", /* name */
1722 FALSE, /* partial_inplace */
1723 0, /* src_mask */
1724 0xffff, /* dst_mask */
1725 FALSE), /* pcrel_offset */
1726
1727 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1728 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1729 16, /* rightshift */
1730 1, /* size (0 = byte, 1 = short, 2 = long) */
1731 16, /* bitsize */
1732 FALSE, /* pc_relative */
1733 0, /* bitpos */
1734 complain_overflow_dont, /* complain_on_overflow */
1735 ppc64_elf_unhandled_reloc, /* special_function */
1736 "R_PPC64_GOT_TLSLD16_HI", /* name */
1737 FALSE, /* partial_inplace */
1738 0, /* src_mask */
1739 0xffff, /* dst_mask */
1740 FALSE), /* pcrel_offset */
1741
1742 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1743 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1744 16, /* rightshift */
1745 1, /* size (0 = byte, 1 = short, 2 = long) */
1746 16, /* bitsize */
1747 FALSE, /* pc_relative */
1748 0, /* bitpos */
1749 complain_overflow_dont, /* complain_on_overflow */
1750 ppc64_elf_unhandled_reloc, /* special_function */
1751 "R_PPC64_GOT_TLSLD16_HA", /* name */
1752 FALSE, /* partial_inplace */
1753 0, /* src_mask */
1754 0xffff, /* dst_mask */
1755 FALSE), /* pcrel_offset */
1756
1757 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1758 the offset to the entry relative to the TOC base (r2). */
1759 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1760 0, /* rightshift */
1761 1, /* size (0 = byte, 1 = short, 2 = long) */
1762 16, /* bitsize */
1763 FALSE, /* pc_relative */
1764 0, /* bitpos */
1765 complain_overflow_signed, /* complain_on_overflow */
1766 ppc64_elf_unhandled_reloc, /* special_function */
1767 "R_PPC64_GOT_DTPREL16_DS", /* name */
1768 FALSE, /* partial_inplace */
1769 0, /* src_mask */
1770 0xfffc, /* dst_mask */
1771 FALSE), /* pcrel_offset */
1772
1773 /* Like GOT_DTPREL16_DS, but no overflow. */
1774 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1775 0, /* rightshift */
1776 1, /* size (0 = byte, 1 = short, 2 = long) */
1777 16, /* bitsize */
1778 FALSE, /* pc_relative */
1779 0, /* bitpos */
1780 complain_overflow_dont, /* complain_on_overflow */
1781 ppc64_elf_unhandled_reloc, /* special_function */
1782 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1783 FALSE, /* partial_inplace */
1784 0, /* src_mask */
1785 0xfffc, /* dst_mask */
1786 FALSE), /* pcrel_offset */
1787
1788 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1789 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1790 16, /* rightshift */
1791 1, /* size (0 = byte, 1 = short, 2 = long) */
1792 16, /* bitsize */
1793 FALSE, /* pc_relative */
1794 0, /* bitpos */
1795 complain_overflow_dont, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_DTPREL16_HI", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xffff, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1804 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1805 16, /* rightshift */
1806 1, /* size (0 = byte, 1 = short, 2 = long) */
1807 16, /* bitsize */
1808 FALSE, /* pc_relative */
1809 0, /* bitpos */
1810 complain_overflow_dont, /* complain_on_overflow */
1811 ppc64_elf_unhandled_reloc, /* special_function */
1812 "R_PPC64_GOT_DTPREL16_HA", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xffff, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1819 offset to the entry relative to the TOC base (r2). */
1820 HOWTO (R_PPC64_GOT_TPREL16_DS,
1821 0, /* rightshift */
1822 1, /* size (0 = byte, 1 = short, 2 = long) */
1823 16, /* bitsize */
1824 FALSE, /* pc_relative */
1825 0, /* bitpos */
1826 complain_overflow_signed, /* complain_on_overflow */
1827 ppc64_elf_unhandled_reloc, /* special_function */
1828 "R_PPC64_GOT_TPREL16_DS", /* name */
1829 FALSE, /* partial_inplace */
1830 0, /* src_mask */
1831 0xfffc, /* dst_mask */
1832 FALSE), /* pcrel_offset */
1833
1834 /* Like GOT_TPREL16_DS, but no overflow. */
1835 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1836 0, /* rightshift */
1837 1, /* size (0 = byte, 1 = short, 2 = long) */
1838 16, /* bitsize */
1839 FALSE, /* pc_relative */
1840 0, /* bitpos */
1841 complain_overflow_dont, /* complain_on_overflow */
1842 ppc64_elf_unhandled_reloc, /* special_function */
1843 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1844 FALSE, /* partial_inplace */
1845 0, /* src_mask */
1846 0xfffc, /* dst_mask */
1847 FALSE), /* pcrel_offset */
1848
1849 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1850 HOWTO (R_PPC64_GOT_TPREL16_HI,
1851 16, /* rightshift */
1852 1, /* size (0 = byte, 1 = short, 2 = long) */
1853 16, /* bitsize */
1854 FALSE, /* pc_relative */
1855 0, /* bitpos */
1856 complain_overflow_dont, /* complain_on_overflow */
1857 ppc64_elf_unhandled_reloc, /* special_function */
1858 "R_PPC64_GOT_TPREL16_HI", /* name */
1859 FALSE, /* partial_inplace */
1860 0, /* src_mask */
1861 0xffff, /* dst_mask */
1862 FALSE), /* pcrel_offset */
1863
1864 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1865 HOWTO (R_PPC64_GOT_TPREL16_HA,
1866 16, /* rightshift */
1867 1, /* size (0 = byte, 1 = short, 2 = long) */
1868 16, /* bitsize */
1869 FALSE, /* pc_relative */
1870 0, /* bitpos */
1871 complain_overflow_dont, /* complain_on_overflow */
1872 ppc64_elf_unhandled_reloc, /* special_function */
1873 "R_PPC64_GOT_TPREL16_HA", /* name */
1874 FALSE, /* partial_inplace */
1875 0, /* src_mask */
1876 0xffff, /* dst_mask */
1877 FALSE), /* pcrel_offset */
1878
1879 HOWTO (R_PPC64_JMP_IREL, /* type */
1880 0, /* rightshift */
1881 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1882 0, /* bitsize */
1883 FALSE, /* pc_relative */
1884 0, /* bitpos */
1885 complain_overflow_dont, /* complain_on_overflow */
1886 ppc64_elf_unhandled_reloc, /* special_function */
1887 "R_PPC64_JMP_IREL", /* name */
1888 FALSE, /* partial_inplace */
1889 0, /* src_mask */
1890 0, /* dst_mask */
1891 FALSE), /* pcrel_offset */
1892
1893 HOWTO (R_PPC64_IRELATIVE, /* type */
1894 0, /* rightshift */
1895 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1896 64, /* bitsize */
1897 FALSE, /* pc_relative */
1898 0, /* bitpos */
1899 complain_overflow_dont, /* complain_on_overflow */
1900 bfd_elf_generic_reloc, /* special_function */
1901 "R_PPC64_IRELATIVE", /* name */
1902 FALSE, /* partial_inplace */
1903 0, /* src_mask */
1904 ONES (64), /* dst_mask */
1905 FALSE), /* pcrel_offset */
1906
1907 /* A 16 bit relative relocation. */
1908 HOWTO (R_PPC64_REL16, /* type */
1909 0, /* rightshift */
1910 1, /* size (0 = byte, 1 = short, 2 = long) */
1911 16, /* bitsize */
1912 TRUE, /* pc_relative */
1913 0, /* bitpos */
1914 complain_overflow_bitfield, /* complain_on_overflow */
1915 bfd_elf_generic_reloc, /* special_function */
1916 "R_PPC64_REL16", /* name */
1917 FALSE, /* partial_inplace */
1918 0, /* src_mask */
1919 0xffff, /* dst_mask */
1920 TRUE), /* pcrel_offset */
1921
1922 /* A 16 bit relative relocation without overflow. */
1923 HOWTO (R_PPC64_REL16_LO, /* type */
1924 0, /* rightshift */
1925 1, /* size (0 = byte, 1 = short, 2 = long) */
1926 16, /* bitsize */
1927 TRUE, /* pc_relative */
1928 0, /* bitpos */
1929 complain_overflow_dont,/* complain_on_overflow */
1930 bfd_elf_generic_reloc, /* special_function */
1931 "R_PPC64_REL16_LO", /* name */
1932 FALSE, /* partial_inplace */
1933 0, /* src_mask */
1934 0xffff, /* dst_mask */
1935 TRUE), /* pcrel_offset */
1936
1937 /* The high order 16 bits of a relative address. */
1938 HOWTO (R_PPC64_REL16_HI, /* type */
1939 16, /* rightshift */
1940 1, /* size (0 = byte, 1 = short, 2 = long) */
1941 16, /* bitsize */
1942 TRUE, /* pc_relative */
1943 0, /* bitpos */
1944 complain_overflow_dont, /* complain_on_overflow */
1945 bfd_elf_generic_reloc, /* special_function */
1946 "R_PPC64_REL16_HI", /* name */
1947 FALSE, /* partial_inplace */
1948 0, /* src_mask */
1949 0xffff, /* dst_mask */
1950 TRUE), /* pcrel_offset */
1951
1952 /* The high order 16 bits of a relative address, plus 1 if the contents of
1953 the low 16 bits, treated as a signed number, is negative. */
1954 HOWTO (R_PPC64_REL16_HA, /* type */
1955 16, /* rightshift */
1956 1, /* size (0 = byte, 1 = short, 2 = long) */
1957 16, /* bitsize */
1958 TRUE, /* pc_relative */
1959 0, /* bitpos */
1960 complain_overflow_dont, /* complain_on_overflow */
1961 ppc64_elf_ha_reloc, /* special_function */
1962 "R_PPC64_REL16_HA", /* name */
1963 FALSE, /* partial_inplace */
1964 0, /* src_mask */
1965 0xffff, /* dst_mask */
1966 TRUE), /* pcrel_offset */
1967
1968 /* GNU extension to record C++ vtable hierarchy. */
1969 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1970 0, /* rightshift */
1971 0, /* size (0 = byte, 1 = short, 2 = long) */
1972 0, /* bitsize */
1973 FALSE, /* pc_relative */
1974 0, /* bitpos */
1975 complain_overflow_dont, /* complain_on_overflow */
1976 NULL, /* special_function */
1977 "R_PPC64_GNU_VTINHERIT", /* name */
1978 FALSE, /* partial_inplace */
1979 0, /* src_mask */
1980 0, /* dst_mask */
1981 FALSE), /* pcrel_offset */
1982
1983 /* GNU extension to record C++ vtable member usage. */
1984 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1985 0, /* rightshift */
1986 0, /* size (0 = byte, 1 = short, 2 = long) */
1987 0, /* bitsize */
1988 FALSE, /* pc_relative */
1989 0, /* bitpos */
1990 complain_overflow_dont, /* complain_on_overflow */
1991 NULL, /* special_function */
1992 "R_PPC64_GNU_VTENTRY", /* name */
1993 FALSE, /* partial_inplace */
1994 0, /* src_mask */
1995 0, /* dst_mask */
1996 FALSE), /* pcrel_offset */
1997 };
1998
1999 \f
2000 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2001 be done. */
2002
2003 static void
2004 ppc_howto_init (void)
2005 {
2006 unsigned int i, type;
2007
2008 for (i = 0;
2009 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2010 i++)
2011 {
2012 type = ppc64_elf_howto_raw[i].type;
2013 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2014 / sizeof (ppc64_elf_howto_table[0])));
2015 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2016 }
2017 }
2018
2019 static reloc_howto_type *
2020 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2021 bfd_reloc_code_real_type code)
2022 {
2023 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2024
2025 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2026 /* Initialize howto table if needed. */
2027 ppc_howto_init ();
2028
2029 switch (code)
2030 {
2031 default:
2032 return NULL;
2033
2034 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2035 break;
2036 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2037 break;
2038 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2039 break;
2040 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2041 break;
2042 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2043 break;
2044 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2045 break;
2046 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2047 break;
2048 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2049 break;
2050 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2051 break;
2052 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2053 break;
2054 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2055 break;
2056 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2057 break;
2058 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2059 break;
2060 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2061 break;
2062 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2063 break;
2064 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2065 break;
2066 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2067 break;
2068 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2069 break;
2070 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2071 break;
2072 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2073 break;
2074 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2075 break;
2076 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2077 break;
2078 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2079 break;
2080 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2081 break;
2082 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2083 break;
2084 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2085 break;
2086 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2087 break;
2088 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2089 break;
2090 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2091 break;
2092 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2093 break;
2094 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2095 break;
2096 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2097 break;
2098 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2099 break;
2100 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2101 break;
2102 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2103 break;
2104 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2105 break;
2106 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2107 break;
2108 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2109 break;
2110 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2111 break;
2112 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2113 break;
2114 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2115 break;
2116 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2117 break;
2118 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2119 break;
2120 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2121 break;
2122 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2123 break;
2124 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2125 break;
2126 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2127 break;
2128 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2129 break;
2130 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2131 break;
2132 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2133 break;
2134 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2135 break;
2136 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2137 break;
2138 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2139 break;
2140 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2141 break;
2142 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2143 break;
2144 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2145 break;
2146 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2147 break;
2148 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2149 break;
2150 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2151 break;
2152 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2153 break;
2154 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2155 break;
2156 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2157 break;
2158 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2159 break;
2160 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2161 break;
2162 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2163 break;
2164 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2165 break;
2166 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2167 break;
2168 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2169 break;
2170 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2171 break;
2172 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2173 break;
2174 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2175 break;
2176 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2177 break;
2178 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2179 break;
2180 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2181 break;
2182 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2183 break;
2184 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2185 break;
2186 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2187 break;
2188 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2189 break;
2190 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2191 break;
2192 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2193 break;
2194 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2195 break;
2196 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2197 break;
2198 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2199 break;
2200 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2201 break;
2202 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2203 break;
2204 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2205 break;
2206 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2207 break;
2208 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2209 break;
2210 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2211 break;
2212 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2213 break;
2214 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2215 break;
2216 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2217 break;
2218 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2219 break;
2220 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2221 break;
2222 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2223 break;
2224 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2225 break;
2226 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2227 break;
2228 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2229 break;
2230 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2231 break;
2232 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2233 break;
2234 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2235 break;
2236 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2237 break;
2238 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2239 break;
2240 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2241 break;
2242 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2243 break;
2244 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2245 break;
2246 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2247 break;
2248 }
2249
2250 return ppc64_elf_howto_table[r];
2251 };
2252
2253 static reloc_howto_type *
2254 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2255 const char *r_name)
2256 {
2257 unsigned int i;
2258
2259 for (i = 0;
2260 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2261 i++)
2262 if (ppc64_elf_howto_raw[i].name != NULL
2263 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2264 return &ppc64_elf_howto_raw[i];
2265
2266 return NULL;
2267 }
2268
2269 /* Set the howto pointer for a PowerPC ELF reloc. */
2270
2271 static void
2272 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2273 Elf_Internal_Rela *dst)
2274 {
2275 unsigned int type;
2276
2277 /* Initialize howto table if needed. */
2278 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2279 ppc_howto_init ();
2280
2281 type = ELF64_R_TYPE (dst->r_info);
2282 if (type >= (sizeof (ppc64_elf_howto_table)
2283 / sizeof (ppc64_elf_howto_table[0])))
2284 {
2285 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2286 abfd, (int) type);
2287 type = R_PPC64_NONE;
2288 }
2289 cache_ptr->howto = ppc64_elf_howto_table[type];
2290 }
2291
2292 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2293
2294 static bfd_reloc_status_type
2295 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2296 void *data, asection *input_section,
2297 bfd *output_bfd, char **error_message)
2298 {
2299 /* If this is a relocatable link (output_bfd test tells us), just
2300 call the generic function. Any adjustment will be done at final
2301 link time. */
2302 if (output_bfd != NULL)
2303 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2304 input_section, output_bfd, error_message);
2305
2306 /* Adjust the addend for sign extension of the low 16 bits.
2307 We won't actually be using the low 16 bits, so trashing them
2308 doesn't matter. */
2309 reloc_entry->addend += 0x8000;
2310 return bfd_reloc_continue;
2311 }
2312
2313 static bfd_reloc_status_type
2314 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2315 void *data, asection *input_section,
2316 bfd *output_bfd, char **error_message)
2317 {
2318 if (output_bfd != NULL)
2319 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2320 input_section, output_bfd, error_message);
2321
2322 if (strcmp (symbol->section->name, ".opd") == 0
2323 && (symbol->section->owner->flags & DYNAMIC) == 0)
2324 {
2325 bfd_vma dest = opd_entry_value (symbol->section,
2326 symbol->value + reloc_entry->addend,
2327 NULL, NULL);
2328 if (dest != (bfd_vma) -1)
2329 reloc_entry->addend = dest - (symbol->value
2330 + symbol->section->output_section->vma
2331 + symbol->section->output_offset);
2332 }
2333 return bfd_reloc_continue;
2334 }
2335
2336 static bfd_reloc_status_type
2337 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2338 void *data, asection *input_section,
2339 bfd *output_bfd, char **error_message)
2340 {
2341 long insn;
2342 enum elf_ppc64_reloc_type r_type;
2343 bfd_size_type octets;
2344 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2345 bfd_boolean is_power4 = FALSE;
2346
2347 /* If this is a relocatable link (output_bfd test tells us), just
2348 call the generic function. Any adjustment will be done at final
2349 link time. */
2350 if (output_bfd != NULL)
2351 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2352 input_section, output_bfd, error_message);
2353
2354 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2355 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2356 insn &= ~(0x01 << 21);
2357 r_type = reloc_entry->howto->type;
2358 if (r_type == R_PPC64_ADDR14_BRTAKEN
2359 || r_type == R_PPC64_REL14_BRTAKEN)
2360 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2361
2362 if (is_power4)
2363 {
2364 /* Set 'a' bit. This is 0b00010 in BO field for branch
2365 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2366 for branch on CTR insns (BO == 1a00t or 1a01t). */
2367 if ((insn & (0x14 << 21)) == (0x04 << 21))
2368 insn |= 0x02 << 21;
2369 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2370 insn |= 0x08 << 21;
2371 else
2372 goto out;
2373 }
2374 else
2375 {
2376 bfd_vma target = 0;
2377 bfd_vma from;
2378
2379 if (!bfd_is_com_section (symbol->section))
2380 target = symbol->value;
2381 target += symbol->section->output_section->vma;
2382 target += symbol->section->output_offset;
2383 target += reloc_entry->addend;
2384
2385 from = (reloc_entry->address
2386 + input_section->output_offset
2387 + input_section->output_section->vma);
2388
2389 /* Invert 'y' bit if not the default. */
2390 if ((bfd_signed_vma) (target - from) < 0)
2391 insn ^= 0x01 << 21;
2392 }
2393 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2394 out:
2395 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2396 input_section, output_bfd, error_message);
2397 }
2398
2399 static bfd_reloc_status_type
2400 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2401 void *data, asection *input_section,
2402 bfd *output_bfd, char **error_message)
2403 {
2404 /* If this is a relocatable link (output_bfd test tells us), just
2405 call the generic function. Any adjustment will be done at final
2406 link time. */
2407 if (output_bfd != NULL)
2408 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2409 input_section, output_bfd, error_message);
2410
2411 /* Subtract the symbol section base address. */
2412 reloc_entry->addend -= symbol->section->output_section->vma;
2413 return bfd_reloc_continue;
2414 }
2415
2416 static bfd_reloc_status_type
2417 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2418 void *data, asection *input_section,
2419 bfd *output_bfd, char **error_message)
2420 {
2421 /* If this is a relocatable link (output_bfd test tells us), just
2422 call the generic function. Any adjustment will be done at final
2423 link time. */
2424 if (output_bfd != NULL)
2425 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2426 input_section, output_bfd, error_message);
2427
2428 /* Subtract the symbol section base address. */
2429 reloc_entry->addend -= symbol->section->output_section->vma;
2430
2431 /* Adjust the addend for sign extension of the low 16 bits. */
2432 reloc_entry->addend += 0x8000;
2433 return bfd_reloc_continue;
2434 }
2435
2436 static bfd_reloc_status_type
2437 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2438 void *data, asection *input_section,
2439 bfd *output_bfd, char **error_message)
2440 {
2441 bfd_vma TOCstart;
2442
2443 /* If this is a relocatable link (output_bfd test tells us), just
2444 call the generic function. Any adjustment will be done at final
2445 link time. */
2446 if (output_bfd != NULL)
2447 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2448 input_section, output_bfd, error_message);
2449
2450 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2451 if (TOCstart == 0)
2452 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2453
2454 /* Subtract the TOC base address. */
2455 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2456 return bfd_reloc_continue;
2457 }
2458
2459 static bfd_reloc_status_type
2460 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2461 void *data, asection *input_section,
2462 bfd *output_bfd, char **error_message)
2463 {
2464 bfd_vma TOCstart;
2465
2466 /* If this is a relocatable link (output_bfd test tells us), just
2467 call the generic function. Any adjustment will be done at final
2468 link time. */
2469 if (output_bfd != NULL)
2470 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2471 input_section, output_bfd, error_message);
2472
2473 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2474 if (TOCstart == 0)
2475 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2476
2477 /* Subtract the TOC base address. */
2478 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2479
2480 /* Adjust the addend for sign extension of the low 16 bits. */
2481 reloc_entry->addend += 0x8000;
2482 return bfd_reloc_continue;
2483 }
2484
2485 static bfd_reloc_status_type
2486 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2487 void *data, asection *input_section,
2488 bfd *output_bfd, char **error_message)
2489 {
2490 bfd_vma TOCstart;
2491 bfd_size_type octets;
2492
2493 /* If this is a relocatable link (output_bfd test tells us), just
2494 call the generic function. Any adjustment will be done at final
2495 link time. */
2496 if (output_bfd != NULL)
2497 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2498 input_section, output_bfd, error_message);
2499
2500 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2501 if (TOCstart == 0)
2502 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2503
2504 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2505 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2506 return bfd_reloc_ok;
2507 }
2508
2509 static bfd_reloc_status_type
2510 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2511 void *data, asection *input_section,
2512 bfd *output_bfd, char **error_message)
2513 {
2514 /* If this is a relocatable link (output_bfd test tells us), just
2515 call the generic function. Any adjustment will be done at final
2516 link time. */
2517 if (output_bfd != NULL)
2518 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2519 input_section, output_bfd, error_message);
2520
2521 if (error_message != NULL)
2522 {
2523 static char buf[60];
2524 sprintf (buf, "generic linker can't handle %s",
2525 reloc_entry->howto->name);
2526 *error_message = buf;
2527 }
2528 return bfd_reloc_dangerous;
2529 }
2530
2531 /* Track GOT entries needed for a given symbol. We might need more
2532 than one got entry per symbol. */
2533 struct got_entry
2534 {
2535 struct got_entry *next;
2536
2537 /* The symbol addend that we'll be placing in the GOT. */
2538 bfd_vma addend;
2539
2540 /* Unlike other ELF targets, we use separate GOT entries for the same
2541 symbol referenced from different input files. This is to support
2542 automatic multiple TOC/GOT sections, where the TOC base can vary
2543 from one input file to another. After partitioning into TOC groups
2544 we merge entries within the group.
2545
2546 Point to the BFD owning this GOT entry. */
2547 bfd *owner;
2548
2549 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2550 TLS_TPREL or TLS_DTPREL for tls entries. */
2551 unsigned char tls_type;
2552
2553 /* Non-zero if got.ent points to real entry. */
2554 unsigned char is_indirect;
2555
2556 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2557 union
2558 {
2559 bfd_signed_vma refcount;
2560 bfd_vma offset;
2561 struct got_entry *ent;
2562 } got;
2563 };
2564
2565 /* The same for PLT. */
2566 struct plt_entry
2567 {
2568 struct plt_entry *next;
2569
2570 bfd_vma addend;
2571
2572 union
2573 {
2574 bfd_signed_vma refcount;
2575 bfd_vma offset;
2576 } plt;
2577 };
2578
2579 struct ppc64_elf_obj_tdata
2580 {
2581 struct elf_obj_tdata elf;
2582
2583 /* Shortcuts to dynamic linker sections. */
2584 asection *got;
2585 asection *relgot;
2586
2587 /* Used during garbage collection. We attach global symbols defined
2588 on removed .opd entries to this section so that the sym is removed. */
2589 asection *deleted_section;
2590
2591 /* TLS local dynamic got entry handling. Support for multiple GOT
2592 sections means we potentially need one of these for each input bfd. */
2593 struct got_entry tlsld_got;
2594
2595 /* A copy of relocs before they are modified for --emit-relocs. */
2596 Elf_Internal_Rela *opd_relocs;
2597
2598 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2599 the reloc to be in the range -32768 to 32767. */
2600 unsigned int has_small_toc_reloc;
2601 };
2602
2603 #define ppc64_elf_tdata(bfd) \
2604 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2605
2606 #define ppc64_tlsld_got(bfd) \
2607 (&ppc64_elf_tdata (bfd)->tlsld_got)
2608
2609 #define is_ppc64_elf(bfd) \
2610 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2611 && elf_object_id (bfd) == PPC64_ELF_DATA)
2612
2613 /* Override the generic function because we store some extras. */
2614
2615 static bfd_boolean
2616 ppc64_elf_mkobject (bfd *abfd)
2617 {
2618 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2619 PPC64_ELF_DATA);
2620 }
2621
2622 /* Fix bad default arch selected for a 64 bit input bfd when the
2623 default is 32 bit. */
2624
2625 static bfd_boolean
2626 ppc64_elf_object_p (bfd *abfd)
2627 {
2628 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2629 {
2630 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2631
2632 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2633 {
2634 /* Relies on arch after 32 bit default being 64 bit default. */
2635 abfd->arch_info = abfd->arch_info->next;
2636 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2637 }
2638 }
2639 return TRUE;
2640 }
2641
2642 /* Support for core dump NOTE sections. */
2643
2644 static bfd_boolean
2645 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2646 {
2647 size_t offset, size;
2648
2649 if (note->descsz != 504)
2650 return FALSE;
2651
2652 /* pr_cursig */
2653 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2654
2655 /* pr_pid */
2656 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 32);
2657
2658 /* pr_reg */
2659 offset = 112;
2660 size = 384;
2661
2662 /* Make a ".reg/999" section. */
2663 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2664 size, note->descpos + offset);
2665 }
2666
2667 static bfd_boolean
2668 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2669 {
2670 if (note->descsz != 136)
2671 return FALSE;
2672
2673 elf_tdata (abfd)->core_program
2674 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2675 elf_tdata (abfd)->core_command
2676 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2677
2678 return TRUE;
2679 }
2680
2681 static char *
2682 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2683 ...)
2684 {
2685 switch (note_type)
2686 {
2687 default:
2688 return NULL;
2689
2690 case NT_PRPSINFO:
2691 {
2692 char data[136];
2693 va_list ap;
2694
2695 va_start (ap, note_type);
2696 memset (data, 0, 40);
2697 strncpy (data + 40, va_arg (ap, const char *), 16);
2698 strncpy (data + 56, va_arg (ap, const char *), 80);
2699 va_end (ap);
2700 return elfcore_write_note (abfd, buf, bufsiz,
2701 "CORE", note_type, data, sizeof (data));
2702 }
2703
2704 case NT_PRSTATUS:
2705 {
2706 char data[504];
2707 va_list ap;
2708 long pid;
2709 int cursig;
2710 const void *greg;
2711
2712 va_start (ap, note_type);
2713 memset (data, 0, 112);
2714 pid = va_arg (ap, long);
2715 bfd_put_32 (abfd, pid, data + 32);
2716 cursig = va_arg (ap, int);
2717 bfd_put_16 (abfd, cursig, data + 12);
2718 greg = va_arg (ap, const void *);
2719 memcpy (data + 112, greg, 384);
2720 memset (data + 496, 0, 8);
2721 va_end (ap);
2722 return elfcore_write_note (abfd, buf, bufsiz,
2723 "CORE", note_type, data, sizeof (data));
2724 }
2725 }
2726 }
2727
2728 /* Merge backend specific data from an object file to the output
2729 object file when linking. */
2730
2731 static bfd_boolean
2732 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2733 {
2734 /* Check if we have the same endianess. */
2735 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2736 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2737 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2738 {
2739 const char *msg;
2740
2741 if (bfd_big_endian (ibfd))
2742 msg = _("%B: compiled for a big endian system "
2743 "and target is little endian");
2744 else
2745 msg = _("%B: compiled for a little endian system "
2746 "and target is big endian");
2747
2748 (*_bfd_error_handler) (msg, ibfd);
2749
2750 bfd_set_error (bfd_error_wrong_format);
2751 return FALSE;
2752 }
2753
2754 return TRUE;
2755 }
2756
2757 /* Add extra PPC sections. */
2758
2759 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2760 {
2761 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2762 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2765 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2766 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2767 { NULL, 0, 0, 0, 0 }
2768 };
2769
2770 enum _ppc64_sec_type {
2771 sec_normal = 0,
2772 sec_opd = 1,
2773 sec_toc = 2
2774 };
2775
2776 struct _ppc64_elf_section_data
2777 {
2778 struct bfd_elf_section_data elf;
2779
2780 union
2781 {
2782 /* An array with one entry for each opd function descriptor. */
2783 struct _opd_sec_data
2784 {
2785 /* Points to the function code section for local opd entries. */
2786 asection **func_sec;
2787
2788 /* After editing .opd, adjust references to opd local syms. */
2789 long *adjust;
2790 } opd;
2791
2792 /* An array for toc sections, indexed by offset/8. */
2793 struct _toc_sec_data
2794 {
2795 /* Specifies the relocation symbol index used at a given toc offset. */
2796 unsigned *symndx;
2797
2798 /* And the relocation addend. */
2799 bfd_vma *add;
2800 } toc;
2801 } u;
2802
2803 enum _ppc64_sec_type sec_type:2;
2804
2805 /* Flag set when small branches are detected. Used to
2806 select suitable defaults for the stub group size. */
2807 unsigned int has_14bit_branch:1;
2808 };
2809
2810 #define ppc64_elf_section_data(sec) \
2811 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2812
2813 static bfd_boolean
2814 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2815 {
2816 if (!sec->used_by_bfd)
2817 {
2818 struct _ppc64_elf_section_data *sdata;
2819 bfd_size_type amt = sizeof (*sdata);
2820
2821 sdata = bfd_zalloc (abfd, amt);
2822 if (sdata == NULL)
2823 return FALSE;
2824 sec->used_by_bfd = sdata;
2825 }
2826
2827 return _bfd_elf_new_section_hook (abfd, sec);
2828 }
2829
2830 static struct _opd_sec_data *
2831 get_opd_info (asection * sec)
2832 {
2833 if (sec != NULL
2834 && ppc64_elf_section_data (sec) != NULL
2835 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2836 return &ppc64_elf_section_data (sec)->u.opd;
2837 return NULL;
2838 }
2839 \f
2840 /* Parameters for the qsort hook. */
2841 static bfd_boolean synthetic_relocatable;
2842
2843 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2844
2845 static int
2846 compare_symbols (const void *ap, const void *bp)
2847 {
2848 const asymbol *a = * (const asymbol **) ap;
2849 const asymbol *b = * (const asymbol **) bp;
2850
2851 /* Section symbols first. */
2852 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2853 return -1;
2854 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2855 return 1;
2856
2857 /* then .opd symbols. */
2858 if (strcmp (a->section->name, ".opd") == 0
2859 && strcmp (b->section->name, ".opd") != 0)
2860 return -1;
2861 if (strcmp (a->section->name, ".opd") != 0
2862 && strcmp (b->section->name, ".opd") == 0)
2863 return 1;
2864
2865 /* then other code symbols. */
2866 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 == (SEC_CODE | SEC_ALLOC)
2868 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2869 != (SEC_CODE | SEC_ALLOC))
2870 return -1;
2871
2872 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2873 != (SEC_CODE | SEC_ALLOC)
2874 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2875 == (SEC_CODE | SEC_ALLOC))
2876 return 1;
2877
2878 if (synthetic_relocatable)
2879 {
2880 if (a->section->id < b->section->id)
2881 return -1;
2882
2883 if (a->section->id > b->section->id)
2884 return 1;
2885 }
2886
2887 if (a->value + a->section->vma < b->value + b->section->vma)
2888 return -1;
2889
2890 if (a->value + a->section->vma > b->value + b->section->vma)
2891 return 1;
2892
2893 /* For syms with the same value, prefer strong dynamic global function
2894 syms over other syms. */
2895 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2896 return -1;
2897
2898 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2899 return 1;
2900
2901 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2902 return -1;
2903
2904 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2905 return 1;
2906
2907 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2908 return -1;
2909
2910 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2911 return 1;
2912
2913 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2914 return -1;
2915
2916 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2917 return 1;
2918
2919 return 0;
2920 }
2921
2922 /* Search SYMS for a symbol of the given VALUE. */
2923
2924 static asymbol *
2925 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2926 {
2927 long mid;
2928
2929 if (id == -1)
2930 {
2931 while (lo < hi)
2932 {
2933 mid = (lo + hi) >> 1;
2934 if (syms[mid]->value + syms[mid]->section->vma < value)
2935 lo = mid + 1;
2936 else if (syms[mid]->value + syms[mid]->section->vma > value)
2937 hi = mid;
2938 else
2939 return syms[mid];
2940 }
2941 }
2942 else
2943 {
2944 while (lo < hi)
2945 {
2946 mid = (lo + hi) >> 1;
2947 if (syms[mid]->section->id < id)
2948 lo = mid + 1;
2949 else if (syms[mid]->section->id > id)
2950 hi = mid;
2951 else if (syms[mid]->value < value)
2952 lo = mid + 1;
2953 else if (syms[mid]->value > value)
2954 hi = mid;
2955 else
2956 return syms[mid];
2957 }
2958 }
2959 return NULL;
2960 }
2961
2962 static bfd_boolean
2963 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2964 {
2965 bfd_vma vma = *(bfd_vma *) ptr;
2966 return ((section->flags & SEC_ALLOC) != 0
2967 && section->vma <= vma
2968 && vma < section->vma + section->size);
2969 }
2970
2971 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2972 entry syms. Also generate @plt symbols for the glink branch table. */
2973
2974 static long
2975 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2976 long static_count, asymbol **static_syms,
2977 long dyn_count, asymbol **dyn_syms,
2978 asymbol **ret)
2979 {
2980 asymbol *s;
2981 long i;
2982 long count;
2983 char *names;
2984 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2985 asection *opd;
2986 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2987 asymbol **syms;
2988
2989 *ret = NULL;
2990
2991 opd = bfd_get_section_by_name (abfd, ".opd");
2992 if (opd == NULL)
2993 return 0;
2994
2995 symcount = static_count;
2996 if (!relocatable)
2997 symcount += dyn_count;
2998 if (symcount == 0)
2999 return 0;
3000
3001 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3002 if (syms == NULL)
3003 return -1;
3004
3005 if (!relocatable && static_count != 0 && dyn_count != 0)
3006 {
3007 /* Use both symbol tables. */
3008 memcpy (syms, static_syms, static_count * sizeof (*syms));
3009 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3010 }
3011 else if (!relocatable && static_count == 0)
3012 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3013 else
3014 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3015
3016 synthetic_relocatable = relocatable;
3017 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3018
3019 if (!relocatable && symcount > 1)
3020 {
3021 long j;
3022 /* Trim duplicate syms, since we may have merged the normal and
3023 dynamic symbols. Actually, we only care about syms that have
3024 different values, so trim any with the same value. */
3025 for (i = 1, j = 1; i < symcount; ++i)
3026 if (syms[i - 1]->value + syms[i - 1]->section->vma
3027 != syms[i]->value + syms[i]->section->vma)
3028 syms[j++] = syms[i];
3029 symcount = j;
3030 }
3031
3032 i = 0;
3033 if (strcmp (syms[i]->section->name, ".opd") == 0)
3034 ++i;
3035 codesecsym = i;
3036
3037 for (; i < symcount; ++i)
3038 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3039 != (SEC_CODE | SEC_ALLOC))
3040 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3041 break;
3042 codesecsymend = i;
3043
3044 for (; i < symcount; ++i)
3045 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3046 break;
3047 secsymend = i;
3048
3049 for (; i < symcount; ++i)
3050 if (strcmp (syms[i]->section->name, ".opd") != 0)
3051 break;
3052 opdsymend = i;
3053
3054 for (; i < symcount; ++i)
3055 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3056 != (SEC_CODE | SEC_ALLOC))
3057 break;
3058 symcount = i;
3059
3060 count = 0;
3061
3062 if (relocatable)
3063 {
3064 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3065 arelent *r;
3066 size_t size;
3067 long relcount;
3068
3069 if (opdsymend == secsymend)
3070 goto done;
3071
3072 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3073 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3074 if (relcount == 0)
3075 goto done;
3076
3077 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3078 {
3079 count = -1;
3080 goto done;
3081 }
3082
3083 size = 0;
3084 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3085 {
3086 asymbol *sym;
3087
3088 while (r < opd->relocation + relcount
3089 && r->address < syms[i]->value + opd->vma)
3090 ++r;
3091
3092 if (r == opd->relocation + relcount)
3093 break;
3094
3095 if (r->address != syms[i]->value + opd->vma)
3096 continue;
3097
3098 if (r->howto->type != R_PPC64_ADDR64)
3099 continue;
3100
3101 sym = *r->sym_ptr_ptr;
3102 if (!sym_exists_at (syms, opdsymend, symcount,
3103 sym->section->id, sym->value + r->addend))
3104 {
3105 ++count;
3106 size += sizeof (asymbol);
3107 size += strlen (syms[i]->name) + 2;
3108 }
3109 }
3110
3111 s = *ret = bfd_malloc (size);
3112 if (s == NULL)
3113 {
3114 count = -1;
3115 goto done;
3116 }
3117
3118 names = (char *) (s + count);
3119
3120 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3121 {
3122 asymbol *sym;
3123
3124 while (r < opd->relocation + relcount
3125 && r->address < syms[i]->value + opd->vma)
3126 ++r;
3127
3128 if (r == opd->relocation + relcount)
3129 break;
3130
3131 if (r->address != syms[i]->value + opd->vma)
3132 continue;
3133
3134 if (r->howto->type != R_PPC64_ADDR64)
3135 continue;
3136
3137 sym = *r->sym_ptr_ptr;
3138 if (!sym_exists_at (syms, opdsymend, symcount,
3139 sym->section->id, sym->value + r->addend))
3140 {
3141 size_t len;
3142
3143 *s = *syms[i];
3144 s->flags |= BSF_SYNTHETIC;
3145 s->section = sym->section;
3146 s->value = sym->value + r->addend;
3147 s->name = names;
3148 *names++ = '.';
3149 len = strlen (syms[i]->name);
3150 memcpy (names, syms[i]->name, len + 1);
3151 names += len + 1;
3152 /* Have udata.p point back to the original symbol this
3153 synthetic symbol was derived from. */
3154 s->udata.p = syms[i];
3155 s++;
3156 }
3157 }
3158 }
3159 else
3160 {
3161 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3162 bfd_byte *contents;
3163 size_t size;
3164 long plt_count = 0;
3165 bfd_vma glink_vma = 0, resolv_vma = 0;
3166 asection *dynamic, *glink = NULL, *relplt = NULL;
3167 arelent *p;
3168
3169 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3170 {
3171 if (contents)
3172 {
3173 free_contents_and_exit:
3174 free (contents);
3175 }
3176 count = -1;
3177 goto done;
3178 }
3179
3180 size = 0;
3181 for (i = secsymend; i < opdsymend; ++i)
3182 {
3183 bfd_vma ent;
3184
3185 /* Ignore bogus symbols. */
3186 if (syms[i]->value > opd->size - 8)
3187 continue;
3188
3189 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3190 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3191 {
3192 ++count;
3193 size += sizeof (asymbol);
3194 size += strlen (syms[i]->name) + 2;
3195 }
3196 }
3197
3198 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3199 if (dyn_count != 0
3200 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3201 {
3202 bfd_byte *dynbuf, *extdyn, *extdynend;
3203 size_t extdynsize;
3204 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3205
3206 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3207 goto free_contents_and_exit;
3208
3209 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3210 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3211
3212 extdyn = dynbuf;
3213 extdynend = extdyn + dynamic->size;
3214 for (; extdyn < extdynend; extdyn += extdynsize)
3215 {
3216 Elf_Internal_Dyn dyn;
3217 (*swap_dyn_in) (abfd, extdyn, &dyn);
3218
3219 if (dyn.d_tag == DT_NULL)
3220 break;
3221
3222 if (dyn.d_tag == DT_PPC64_GLINK)
3223 {
3224 /* The first glink stub starts at offset 32; see comment in
3225 ppc64_elf_finish_dynamic_sections. */
3226 glink_vma = dyn.d_un.d_val + 32;
3227 /* The .glink section usually does not survive the final
3228 link; search for the section (usually .text) where the
3229 glink stubs now reside. */
3230 glink = bfd_sections_find_if (abfd, section_covers_vma,
3231 &glink_vma);
3232 break;
3233 }
3234 }
3235
3236 free (dynbuf);
3237 }
3238
3239 if (glink != NULL)
3240 {
3241 /* Determine __glink trampoline by reading the relative branch
3242 from the first glink stub. */
3243 bfd_byte buf[4];
3244 if (bfd_get_section_contents (abfd, glink, buf,
3245 glink_vma + 4 - glink->vma, 4))
3246 {
3247 unsigned int insn = bfd_get_32 (abfd, buf);
3248 insn ^= B_DOT;
3249 if ((insn & ~0x3fffffc) == 0)
3250 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3251 }
3252
3253 if (resolv_vma)
3254 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3255
3256 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3257 if (relplt != NULL)
3258 {
3259 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3260 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3261 goto free_contents_and_exit;
3262
3263 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3264 size += plt_count * sizeof (asymbol);
3265
3266 p = relplt->relocation;
3267 for (i = 0; i < plt_count; i++, p++)
3268 {
3269 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3270 if (p->addend != 0)
3271 size += sizeof ("+0x") - 1 + 16;
3272 }
3273 }
3274 }
3275
3276 s = *ret = bfd_malloc (size);
3277 if (s == NULL)
3278 goto free_contents_and_exit;
3279
3280 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3281
3282 for (i = secsymend; i < opdsymend; ++i)
3283 {
3284 bfd_vma ent;
3285
3286 if (syms[i]->value > opd->size - 8)
3287 continue;
3288
3289 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3290 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3291 {
3292 long lo, hi;
3293 size_t len;
3294 asection *sec = abfd->sections;
3295
3296 *s = *syms[i];
3297 lo = codesecsym;
3298 hi = codesecsymend;
3299 while (lo < hi)
3300 {
3301 long mid = (lo + hi) >> 1;
3302 if (syms[mid]->section->vma < ent)
3303 lo = mid + 1;
3304 else if (syms[mid]->section->vma > ent)
3305 hi = mid;
3306 else
3307 {
3308 sec = syms[mid]->section;
3309 break;
3310 }
3311 }
3312
3313 if (lo >= hi && lo > codesecsym)
3314 sec = syms[lo - 1]->section;
3315
3316 for (; sec != NULL; sec = sec->next)
3317 {
3318 if (sec->vma > ent)
3319 break;
3320 if ((sec->flags & SEC_ALLOC) == 0
3321 || (sec->flags & SEC_LOAD) == 0)
3322 break;
3323 if ((sec->flags & SEC_CODE) != 0)
3324 s->section = sec;
3325 }
3326 s->flags |= BSF_SYNTHETIC;
3327 s->value = ent - s->section->vma;
3328 s->name = names;
3329 *names++ = '.';
3330 len = strlen (syms[i]->name);
3331 memcpy (names, syms[i]->name, len + 1);
3332 names += len + 1;
3333 /* Have udata.p point back to the original symbol this
3334 synthetic symbol was derived from. */
3335 s->udata.p = syms[i];
3336 s++;
3337 }
3338 }
3339 free (contents);
3340
3341 if (glink != NULL && relplt != NULL)
3342 {
3343 if (resolv_vma)
3344 {
3345 /* Add a symbol for the main glink trampoline. */
3346 memset (s, 0, sizeof *s);
3347 s->the_bfd = abfd;
3348 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3349 s->section = glink;
3350 s->value = resolv_vma - glink->vma;
3351 s->name = names;
3352 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3353 names += sizeof ("__glink_PLTresolve");
3354 s++;
3355 count++;
3356 }
3357
3358 /* FIXME: It would be very much nicer to put sym@plt on the
3359 stub rather than on the glink branch table entry. The
3360 objdump disassembler would then use a sensible symbol
3361 name on plt calls. The difficulty in doing so is
3362 a) finding the stubs, and,
3363 b) matching stubs against plt entries, and,
3364 c) there can be multiple stubs for a given plt entry.
3365
3366 Solving (a) could be done by code scanning, but older
3367 ppc64 binaries used different stubs to current code.
3368 (b) is the tricky one since you need to known the toc
3369 pointer for at least one function that uses a pic stub to
3370 be able to calculate the plt address referenced.
3371 (c) means gdb would need to set multiple breakpoints (or
3372 find the glink branch itself) when setting breakpoints
3373 for pending shared library loads. */
3374 p = relplt->relocation;
3375 for (i = 0; i < plt_count; i++, p++)
3376 {
3377 size_t len;
3378
3379 *s = **p->sym_ptr_ptr;
3380 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3381 we are defining a symbol, ensure one of them is set. */
3382 if ((s->flags & BSF_LOCAL) == 0)
3383 s->flags |= BSF_GLOBAL;
3384 s->flags |= BSF_SYNTHETIC;
3385 s->section = glink;
3386 s->value = glink_vma - glink->vma;
3387 s->name = names;
3388 s->udata.p = NULL;
3389 len = strlen ((*p->sym_ptr_ptr)->name);
3390 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3391 names += len;
3392 if (p->addend != 0)
3393 {
3394 memcpy (names, "+0x", sizeof ("+0x") - 1);
3395 names += sizeof ("+0x") - 1;
3396 bfd_sprintf_vma (abfd, names, p->addend);
3397 names += strlen (names);
3398 }
3399 memcpy (names, "@plt", sizeof ("@plt"));
3400 names += sizeof ("@plt");
3401 s++;
3402 glink_vma += 8;
3403 if (i >= 0x8000)
3404 glink_vma += 4;
3405 }
3406 count += plt_count;
3407 }
3408 }
3409
3410 done:
3411 free (syms);
3412 return count;
3413 }
3414 \f
3415 /* The following functions are specific to the ELF linker, while
3416 functions above are used generally. Those named ppc64_elf_* are
3417 called by the main ELF linker code. They appear in this file more
3418 or less in the order in which they are called. eg.
3419 ppc64_elf_check_relocs is called early in the link process,
3420 ppc64_elf_finish_dynamic_sections is one of the last functions
3421 called.
3422
3423 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3424 functions have both a function code symbol and a function descriptor
3425 symbol. A call to foo in a relocatable object file looks like:
3426
3427 . .text
3428 . x:
3429 . bl .foo
3430 . nop
3431
3432 The function definition in another object file might be:
3433
3434 . .section .opd
3435 . foo: .quad .foo
3436 . .quad .TOC.@tocbase
3437 . .quad 0
3438 .
3439 . .text
3440 . .foo: blr
3441
3442 When the linker resolves the call during a static link, the branch
3443 unsurprisingly just goes to .foo and the .opd information is unused.
3444 If the function definition is in a shared library, things are a little
3445 different: The call goes via a plt call stub, the opd information gets
3446 copied to the plt, and the linker patches the nop.
3447
3448 . x:
3449 . bl .foo_stub
3450 . ld 2,40(1)
3451 .
3452 .
3453 . .foo_stub:
3454 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3455 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3456 . std 2,40(1) # this is the general idea
3457 . ld 11,0(12)
3458 . ld 2,8(12)
3459 . mtctr 11
3460 . ld 11,16(12)
3461 . bctr
3462 .
3463 . .section .plt
3464 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3465
3466 The "reloc ()" notation is supposed to indicate that the linker emits
3467 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3468 copying.
3469
3470 What are the difficulties here? Well, firstly, the relocations
3471 examined by the linker in check_relocs are against the function code
3472 sym .foo, while the dynamic relocation in the plt is emitted against
3473 the function descriptor symbol, foo. Somewhere along the line, we need
3474 to carefully copy dynamic link information from one symbol to the other.
3475 Secondly, the generic part of the elf linker will make .foo a dynamic
3476 symbol as is normal for most other backends. We need foo dynamic
3477 instead, at least for an application final link. However, when
3478 creating a shared library containing foo, we need to have both symbols
3479 dynamic so that references to .foo are satisfied during the early
3480 stages of linking. Otherwise the linker might decide to pull in a
3481 definition from some other object, eg. a static library.
3482
3483 Update: As of August 2004, we support a new convention. Function
3484 calls may use the function descriptor symbol, ie. "bl foo". This
3485 behaves exactly as "bl .foo". */
3486
3487 /* The linker needs to keep track of the number of relocs that it
3488 decides to copy as dynamic relocs in check_relocs for each symbol.
3489 This is so that it can later discard them if they are found to be
3490 unnecessary. We store the information in a field extending the
3491 regular ELF linker hash table. */
3492
3493 struct ppc_dyn_relocs
3494 {
3495 struct ppc_dyn_relocs *next;
3496
3497 /* The input section of the reloc. */
3498 asection *sec;
3499
3500 /* Total number of relocs copied for the input section. */
3501 bfd_size_type count;
3502
3503 /* Number of pc-relative relocs copied for the input section. */
3504 bfd_size_type pc_count;
3505 };
3506
3507 /* Of those relocs that might be copied as dynamic relocs, this function
3508 selects those that must be copied when linking a shared library,
3509 even when the symbol is local. */
3510
3511 static int
3512 must_be_dyn_reloc (struct bfd_link_info *info,
3513 enum elf_ppc64_reloc_type r_type)
3514 {
3515 switch (r_type)
3516 {
3517 default:
3518 return 1;
3519
3520 case R_PPC64_REL32:
3521 case R_PPC64_REL64:
3522 case R_PPC64_REL30:
3523 return 0;
3524
3525 case R_PPC64_TPREL16:
3526 case R_PPC64_TPREL16_LO:
3527 case R_PPC64_TPREL16_HI:
3528 case R_PPC64_TPREL16_HA:
3529 case R_PPC64_TPREL16_DS:
3530 case R_PPC64_TPREL16_LO_DS:
3531 case R_PPC64_TPREL16_HIGHER:
3532 case R_PPC64_TPREL16_HIGHERA:
3533 case R_PPC64_TPREL16_HIGHEST:
3534 case R_PPC64_TPREL16_HIGHESTA:
3535 case R_PPC64_TPREL64:
3536 return !info->executable;
3537 }
3538 }
3539
3540 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3541 copying dynamic variables from a shared lib into an app's dynbss
3542 section, and instead use a dynamic relocation to point into the
3543 shared lib. With code that gcc generates, it's vital that this be
3544 enabled; In the PowerPC64 ABI, the address of a function is actually
3545 the address of a function descriptor, which resides in the .opd
3546 section. gcc uses the descriptor directly rather than going via the
3547 GOT as some other ABI's do, which means that initialized function
3548 pointers must reference the descriptor. Thus, a function pointer
3549 initialized to the address of a function in a shared library will
3550 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3551 redefines the function descriptor symbol to point to the copy. This
3552 presents a problem as a plt entry for that function is also
3553 initialized from the function descriptor symbol and the copy reloc
3554 may not be initialized first. */
3555 #define ELIMINATE_COPY_RELOCS 1
3556
3557 /* Section name for stubs is the associated section name plus this
3558 string. */
3559 #define STUB_SUFFIX ".stub"
3560
3561 /* Linker stubs.
3562 ppc_stub_long_branch:
3563 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3564 destination, but a 24 bit branch in a stub section will reach.
3565 . b dest
3566
3567 ppc_stub_plt_branch:
3568 Similar to the above, but a 24 bit branch in the stub section won't
3569 reach its destination.
3570 . addis %r12,%r2,xxx@toc@ha
3571 . ld %r11,xxx@toc@l(%r12)
3572 . mtctr %r11
3573 . bctr
3574
3575 ppc_stub_plt_call:
3576 Used to call a function in a shared library. If it so happens that
3577 the plt entry referenced crosses a 64k boundary, then an extra
3578 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3579 . addis %r12,%r2,xxx@toc@ha
3580 . std %r2,40(%r1)
3581 . ld %r11,xxx+0@toc@l(%r12)
3582 . mtctr %r11
3583 . ld %r2,xxx+8@toc@l(%r12)
3584 . ld %r11,xxx+16@toc@l(%r12)
3585 . bctr
3586
3587 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3588 code to adjust the value and save r2 to support multiple toc sections.
3589 A ppc_stub_long_branch with an r2 offset looks like:
3590 . std %r2,40(%r1)
3591 . addis %r2,%r2,off@ha
3592 . addi %r2,%r2,off@l
3593 . b dest
3594
3595 A ppc_stub_plt_branch with an r2 offset looks like:
3596 . std %r2,40(%r1)
3597 . addis %r12,%r2,xxx@toc@ha
3598 . ld %r11,xxx@toc@l(%r12)
3599 . addis %r2,%r2,off@ha
3600 . addi %r2,%r2,off@l
3601 . mtctr %r11
3602 . bctr
3603
3604 In cases where the "addis" instruction would add zero, the "addis" is
3605 omitted and following instructions modified slightly in some cases.
3606 */
3607
3608 enum ppc_stub_type {
3609 ppc_stub_none,
3610 ppc_stub_long_branch,
3611 ppc_stub_long_branch_r2off,
3612 ppc_stub_plt_branch,
3613 ppc_stub_plt_branch_r2off,
3614 ppc_stub_plt_call
3615 };
3616
3617 struct ppc_stub_hash_entry {
3618
3619 /* Base hash table entry structure. */
3620 struct bfd_hash_entry root;
3621
3622 enum ppc_stub_type stub_type;
3623
3624 /* The stub section. */
3625 asection *stub_sec;
3626
3627 /* Offset within stub_sec of the beginning of this stub. */
3628 bfd_vma stub_offset;
3629
3630 /* Given the symbol's value and its section we can determine its final
3631 value when building the stubs (so the stub knows where to jump. */
3632 bfd_vma target_value;
3633 asection *target_section;
3634
3635 /* The symbol table entry, if any, that this was derived from. */
3636 struct ppc_link_hash_entry *h;
3637 struct plt_entry *plt_ent;
3638
3639 /* And the reloc addend that this was derived from. */
3640 bfd_vma addend;
3641
3642 /* Where this stub is being called from, or, in the case of combined
3643 stub sections, the first input section in the group. */
3644 asection *id_sec;
3645 };
3646
3647 struct ppc_branch_hash_entry {
3648
3649 /* Base hash table entry structure. */
3650 struct bfd_hash_entry root;
3651
3652 /* Offset within branch lookup table. */
3653 unsigned int offset;
3654
3655 /* Generation marker. */
3656 unsigned int iter;
3657 };
3658
3659 struct ppc_link_hash_entry
3660 {
3661 struct elf_link_hash_entry elf;
3662
3663 union {
3664 /* A pointer to the most recently used stub hash entry against this
3665 symbol. */
3666 struct ppc_stub_hash_entry *stub_cache;
3667
3668 /* A pointer to the next symbol starting with a '.' */
3669 struct ppc_link_hash_entry *next_dot_sym;
3670 } u;
3671
3672 /* Track dynamic relocs copied for this symbol. */
3673 struct ppc_dyn_relocs *dyn_relocs;
3674
3675 /* Link between function code and descriptor symbols. */
3676 struct ppc_link_hash_entry *oh;
3677
3678 /* Flag function code and descriptor symbols. */
3679 unsigned int is_func:1;
3680 unsigned int is_func_descriptor:1;
3681 unsigned int fake:1;
3682
3683 /* Whether global opd/toc sym has been adjusted or not.
3684 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3685 should be set for all globals defined in any opd/toc section. */
3686 unsigned int adjust_done:1;
3687
3688 /* Set if we twiddled this symbol to weak at some stage. */
3689 unsigned int was_undefined:1;
3690
3691 /* Contexts in which symbol is used in the GOT (or TOC).
3692 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3693 corresponding relocs are encountered during check_relocs.
3694 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3695 indicate the corresponding GOT entry type is not needed.
3696 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3697 a TPREL one. We use a separate flag rather than setting TPREL
3698 just for convenience in distinguishing the two cases. */
3699 #define TLS_GD 1 /* GD reloc. */
3700 #define TLS_LD 2 /* LD reloc. */
3701 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3702 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3703 #define TLS_TLS 16 /* Any TLS reloc. */
3704 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3705 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3706 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3707 unsigned char tls_mask;
3708 };
3709
3710 /* ppc64 ELF linker hash table. */
3711
3712 struct ppc_link_hash_table
3713 {
3714 struct elf_link_hash_table elf;
3715
3716 /* The stub hash table. */
3717 struct bfd_hash_table stub_hash_table;
3718
3719 /* Another hash table for plt_branch stubs. */
3720 struct bfd_hash_table branch_hash_table;
3721
3722 /* Linker stub bfd. */
3723 bfd *stub_bfd;
3724
3725 /* Linker call-backs. */
3726 asection * (*add_stub_section) (const char *, asection *);
3727 void (*layout_sections_again) (void);
3728
3729 /* Array to keep track of which stub sections have been created, and
3730 information on stub grouping. */
3731 struct map_stub {
3732 /* This is the section to which stubs in the group will be attached. */
3733 asection *link_sec;
3734 /* The stub section. */
3735 asection *stub_sec;
3736 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3737 bfd_vma toc_off;
3738 } *stub_group;
3739
3740 /* Temp used when calculating TOC pointers. */
3741 bfd_vma toc_curr;
3742 bfd *toc_bfd;
3743 asection *toc_first_sec;
3744
3745 /* Highest input section id. */
3746 int top_id;
3747
3748 /* Highest output section index. */
3749 int top_index;
3750
3751 /* Used when adding symbols. */
3752 struct ppc_link_hash_entry *dot_syms;
3753
3754 /* List of input sections for each output section. */
3755 asection **input_list;
3756
3757 /* Short-cuts to get to dynamic linker sections. */
3758 asection *got;
3759 asection *plt;
3760 asection *relplt;
3761 asection *iplt;
3762 asection *reliplt;
3763 asection *dynbss;
3764 asection *relbss;
3765 asection *glink;
3766 asection *sfpr;
3767 asection *brlt;
3768 asection *relbrlt;
3769
3770 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3771 struct ppc_link_hash_entry *tls_get_addr;
3772 struct ppc_link_hash_entry *tls_get_addr_fd;
3773
3774 /* The size of reliplt used by got entry relocs. */
3775 bfd_size_type got_reli_size;
3776
3777 /* Statistics. */
3778 unsigned long stub_count[ppc_stub_plt_call];
3779
3780 /* Number of stubs against global syms. */
3781 unsigned long stub_globals;
3782
3783 /* Set if we should emit symbols for stubs. */
3784 unsigned int emit_stub_syms:1;
3785
3786 /* Set if __tls_get_addr optimization should not be done. */
3787 unsigned int no_tls_get_addr_opt:1;
3788
3789 /* Support for multiple toc sections. */
3790 unsigned int do_multi_toc:1;
3791 unsigned int multi_toc_needed:1;
3792 unsigned int second_toc_pass:1;
3793 unsigned int do_toc_opt:1;
3794
3795 /* Set on error. */
3796 unsigned int stub_error:1;
3797
3798 /* Temp used by ppc64_elf_process_dot_syms. */
3799 unsigned int twiddled_syms:1;
3800
3801 /* Incremented every time we size stubs. */
3802 unsigned int stub_iteration;
3803
3804 /* Small local sym cache. */
3805 struct sym_cache sym_cache;
3806 };
3807
3808 /* Rename some of the generic section flags to better document how they
3809 are used here. */
3810
3811 /* Nonzero if this section has TLS related relocations. */
3812 #define has_tls_reloc sec_flg0
3813
3814 /* Nonzero if this section has a call to __tls_get_addr. */
3815 #define has_tls_get_addr_call sec_flg1
3816
3817 /* Nonzero if this section has any toc or got relocs. */
3818 #define has_toc_reloc sec_flg2
3819
3820 /* Nonzero if this section has a call to another section that uses
3821 the toc or got. */
3822 #define makes_toc_func_call sec_flg3
3823
3824 /* Recursion protection when determining above flag. */
3825 #define call_check_in_progress sec_flg4
3826 #define call_check_done sec_flg5
3827
3828 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3829
3830 #define ppc_hash_table(p) \
3831 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3832 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3833
3834 #define ppc_stub_hash_lookup(table, string, create, copy) \
3835 ((struct ppc_stub_hash_entry *) \
3836 bfd_hash_lookup ((table), (string), (create), (copy)))
3837
3838 #define ppc_branch_hash_lookup(table, string, create, copy) \
3839 ((struct ppc_branch_hash_entry *) \
3840 bfd_hash_lookup ((table), (string), (create), (copy)))
3841
3842 /* Create an entry in the stub hash table. */
3843
3844 static struct bfd_hash_entry *
3845 stub_hash_newfunc (struct bfd_hash_entry *entry,
3846 struct bfd_hash_table *table,
3847 const char *string)
3848 {
3849 /* Allocate the structure if it has not already been allocated by a
3850 subclass. */
3851 if (entry == NULL)
3852 {
3853 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3854 if (entry == NULL)
3855 return entry;
3856 }
3857
3858 /* Call the allocation method of the superclass. */
3859 entry = bfd_hash_newfunc (entry, table, string);
3860 if (entry != NULL)
3861 {
3862 struct ppc_stub_hash_entry *eh;
3863
3864 /* Initialize the local fields. */
3865 eh = (struct ppc_stub_hash_entry *) entry;
3866 eh->stub_type = ppc_stub_none;
3867 eh->stub_sec = NULL;
3868 eh->stub_offset = 0;
3869 eh->target_value = 0;
3870 eh->target_section = NULL;
3871 eh->h = NULL;
3872 eh->id_sec = NULL;
3873 }
3874
3875 return entry;
3876 }
3877
3878 /* Create an entry in the branch hash table. */
3879
3880 static struct bfd_hash_entry *
3881 branch_hash_newfunc (struct bfd_hash_entry *entry,
3882 struct bfd_hash_table *table,
3883 const char *string)
3884 {
3885 /* Allocate the structure if it has not already been allocated by a
3886 subclass. */
3887 if (entry == NULL)
3888 {
3889 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3890 if (entry == NULL)
3891 return entry;
3892 }
3893
3894 /* Call the allocation method of the superclass. */
3895 entry = bfd_hash_newfunc (entry, table, string);
3896 if (entry != NULL)
3897 {
3898 struct ppc_branch_hash_entry *eh;
3899
3900 /* Initialize the local fields. */
3901 eh = (struct ppc_branch_hash_entry *) entry;
3902 eh->offset = 0;
3903 eh->iter = 0;
3904 }
3905
3906 return entry;
3907 }
3908
3909 /* Create an entry in a ppc64 ELF linker hash table. */
3910
3911 static struct bfd_hash_entry *
3912 link_hash_newfunc (struct bfd_hash_entry *entry,
3913 struct bfd_hash_table *table,
3914 const char *string)
3915 {
3916 /* Allocate the structure if it has not already been allocated by a
3917 subclass. */
3918 if (entry == NULL)
3919 {
3920 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3921 if (entry == NULL)
3922 return entry;
3923 }
3924
3925 /* Call the allocation method of the superclass. */
3926 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3927 if (entry != NULL)
3928 {
3929 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3930
3931 memset (&eh->u.stub_cache, 0,
3932 (sizeof (struct ppc_link_hash_entry)
3933 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3934
3935 /* When making function calls, old ABI code references function entry
3936 points (dot symbols), while new ABI code references the function
3937 descriptor symbol. We need to make any combination of reference and
3938 definition work together, without breaking archive linking.
3939
3940 For a defined function "foo" and an undefined call to "bar":
3941 An old object defines "foo" and ".foo", references ".bar" (possibly
3942 "bar" too).
3943 A new object defines "foo" and references "bar".
3944
3945 A new object thus has no problem with its undefined symbols being
3946 satisfied by definitions in an old object. On the other hand, the
3947 old object won't have ".bar" satisfied by a new object.
3948
3949 Keep a list of newly added dot-symbols. */
3950
3951 if (string[0] == '.')
3952 {
3953 struct ppc_link_hash_table *htab;
3954
3955 htab = (struct ppc_link_hash_table *) table;
3956 eh->u.next_dot_sym = htab->dot_syms;
3957 htab->dot_syms = eh;
3958 }
3959 }
3960
3961 return entry;
3962 }
3963
3964 /* Create a ppc64 ELF linker hash table. */
3965
3966 static struct bfd_link_hash_table *
3967 ppc64_elf_link_hash_table_create (bfd *abfd)
3968 {
3969 struct ppc_link_hash_table *htab;
3970 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3971
3972 htab = bfd_zmalloc (amt);
3973 if (htab == NULL)
3974 return NULL;
3975
3976 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3977 sizeof (struct ppc_link_hash_entry),
3978 PPC64_ELF_DATA))
3979 {
3980 free (htab);
3981 return NULL;
3982 }
3983
3984 /* Init the stub hash table too. */
3985 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3986 sizeof (struct ppc_stub_hash_entry)))
3987 return NULL;
3988
3989 /* And the branch hash table. */
3990 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3991 sizeof (struct ppc_branch_hash_entry)))
3992 return NULL;
3993
3994 /* Initializing two fields of the union is just cosmetic. We really
3995 only care about glist, but when compiled on a 32-bit host the
3996 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3997 debugger inspection of these fields look nicer. */
3998 htab->elf.init_got_refcount.refcount = 0;
3999 htab->elf.init_got_refcount.glist = NULL;
4000 htab->elf.init_plt_refcount.refcount = 0;
4001 htab->elf.init_plt_refcount.glist = NULL;
4002 htab->elf.init_got_offset.offset = 0;
4003 htab->elf.init_got_offset.glist = NULL;
4004 htab->elf.init_plt_offset.offset = 0;
4005 htab->elf.init_plt_offset.glist = NULL;
4006
4007 return &htab->elf.root;
4008 }
4009
4010 /* Free the derived linker hash table. */
4011
4012 static void
4013 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4014 {
4015 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
4016
4017 bfd_hash_table_free (&ret->stub_hash_table);
4018 bfd_hash_table_free (&ret->branch_hash_table);
4019 _bfd_generic_link_hash_table_free (hash);
4020 }
4021
4022 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4023
4024 void
4025 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4026 {
4027 struct ppc_link_hash_table *htab;
4028
4029 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4030
4031 /* Always hook our dynamic sections into the first bfd, which is the
4032 linker created stub bfd. This ensures that the GOT header is at
4033 the start of the output TOC section. */
4034 htab = ppc_hash_table (info);
4035 if (htab == NULL)
4036 return;
4037 htab->stub_bfd = abfd;
4038 htab->elf.dynobj = abfd;
4039 }
4040
4041 /* Build a name for an entry in the stub hash table. */
4042
4043 static char *
4044 ppc_stub_name (const asection *input_section,
4045 const asection *sym_sec,
4046 const struct ppc_link_hash_entry *h,
4047 const Elf_Internal_Rela *rel)
4048 {
4049 char *stub_name;
4050 bfd_size_type len;
4051
4052 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4053 offsets from a sym as a branch target? In fact, we could
4054 probably assume the addend is always zero. */
4055 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4056
4057 if (h)
4058 {
4059 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4060 stub_name = bfd_malloc (len);
4061 if (stub_name == NULL)
4062 return stub_name;
4063
4064 sprintf (stub_name, "%08x.%s+%x",
4065 input_section->id & 0xffffffff,
4066 h->elf.root.root.string,
4067 (int) rel->r_addend & 0xffffffff);
4068 }
4069 else
4070 {
4071 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4072 stub_name = bfd_malloc (len);
4073 if (stub_name == NULL)
4074 return stub_name;
4075
4076 sprintf (stub_name, "%08x.%x:%x+%x",
4077 input_section->id & 0xffffffff,
4078 sym_sec->id & 0xffffffff,
4079 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4080 (int) rel->r_addend & 0xffffffff);
4081 }
4082 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4083 stub_name[len - 2] = 0;
4084 return stub_name;
4085 }
4086
4087 /* Look up an entry in the stub hash. Stub entries are cached because
4088 creating the stub name takes a bit of time. */
4089
4090 static struct ppc_stub_hash_entry *
4091 ppc_get_stub_entry (const asection *input_section,
4092 const asection *sym_sec,
4093 struct ppc_link_hash_entry *h,
4094 const Elf_Internal_Rela *rel,
4095 struct ppc_link_hash_table *htab)
4096 {
4097 struct ppc_stub_hash_entry *stub_entry;
4098 const asection *id_sec;
4099
4100 /* If this input section is part of a group of sections sharing one
4101 stub section, then use the id of the first section in the group.
4102 Stub names need to include a section id, as there may well be
4103 more than one stub used to reach say, printf, and we need to
4104 distinguish between them. */
4105 id_sec = htab->stub_group[input_section->id].link_sec;
4106
4107 if (h != NULL && h->u.stub_cache != NULL
4108 && h->u.stub_cache->h == h
4109 && h->u.stub_cache->id_sec == id_sec)
4110 {
4111 stub_entry = h->u.stub_cache;
4112 }
4113 else
4114 {
4115 char *stub_name;
4116
4117 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4118 if (stub_name == NULL)
4119 return NULL;
4120
4121 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4122 stub_name, FALSE, FALSE);
4123 if (h != NULL)
4124 h->u.stub_cache = stub_entry;
4125
4126 free (stub_name);
4127 }
4128
4129 return stub_entry;
4130 }
4131
4132 /* Add a new stub entry to the stub hash. Not all fields of the new
4133 stub entry are initialised. */
4134
4135 static struct ppc_stub_hash_entry *
4136 ppc_add_stub (const char *stub_name,
4137 asection *section,
4138 struct ppc_link_hash_table *htab)
4139 {
4140 asection *link_sec;
4141 asection *stub_sec;
4142 struct ppc_stub_hash_entry *stub_entry;
4143
4144 link_sec = htab->stub_group[section->id].link_sec;
4145 stub_sec = htab->stub_group[section->id].stub_sec;
4146 if (stub_sec == NULL)
4147 {
4148 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4149 if (stub_sec == NULL)
4150 {
4151 size_t namelen;
4152 bfd_size_type len;
4153 char *s_name;
4154
4155 namelen = strlen (link_sec->name);
4156 len = namelen + sizeof (STUB_SUFFIX);
4157 s_name = bfd_alloc (htab->stub_bfd, len);
4158 if (s_name == NULL)
4159 return NULL;
4160
4161 memcpy (s_name, link_sec->name, namelen);
4162 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4163 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4164 if (stub_sec == NULL)
4165 return NULL;
4166 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4167 }
4168 htab->stub_group[section->id].stub_sec = stub_sec;
4169 }
4170
4171 /* Enter this entry into the linker stub hash table. */
4172 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4173 TRUE, FALSE);
4174 if (stub_entry == NULL)
4175 {
4176 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4177 section->owner, stub_name);
4178 return NULL;
4179 }
4180
4181 stub_entry->stub_sec = stub_sec;
4182 stub_entry->stub_offset = 0;
4183 stub_entry->id_sec = link_sec;
4184 return stub_entry;
4185 }
4186
4187 /* Create sections for linker generated code. */
4188
4189 static bfd_boolean
4190 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4191 {
4192 struct ppc_link_hash_table *htab;
4193 flagword flags;
4194
4195 htab = ppc_hash_table (info);
4196 if (htab == NULL)
4197 return FALSE;
4198
4199 /* Create .sfpr for code to save and restore fp regs. */
4200 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4201 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4202 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4203 flags);
4204 if (htab->sfpr == NULL
4205 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4206 return FALSE;
4207
4208 /* Create .glink for lazy dynamic linking support. */
4209 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4210 flags);
4211 if (htab->glink == NULL
4212 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4213 return FALSE;
4214
4215 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4216 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4217 if (htab->iplt == NULL
4218 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4219 return FALSE;
4220
4221 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4222 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4223 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4224 ".rela.iplt",
4225 flags);
4226 if (htab->reliplt == NULL
4227 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4228 return FALSE;
4229
4230 /* Create branch lookup table for plt_branch stubs. */
4231 flags = (SEC_ALLOC | SEC_LOAD
4232 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4233 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4234 flags);
4235 if (htab->brlt == NULL
4236 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4237 return FALSE;
4238
4239 if (!info->shared)
4240 return TRUE;
4241
4242 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4243 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4244 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4245 ".rela.branch_lt",
4246 flags);
4247 if (htab->relbrlt == NULL
4248 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4249 return FALSE;
4250
4251 return TRUE;
4252 }
4253
4254 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4255 not already done. */
4256
4257 static bfd_boolean
4258 create_got_section (bfd *abfd, struct bfd_link_info *info)
4259 {
4260 asection *got, *relgot;
4261 flagword flags;
4262 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4263
4264 if (!is_ppc64_elf (abfd))
4265 return FALSE;
4266 if (htab == NULL)
4267 return FALSE;
4268
4269 if (!htab->got)
4270 {
4271 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4272 return FALSE;
4273
4274 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4275 if (!htab->got)
4276 abort ();
4277 }
4278
4279 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4280 | SEC_LINKER_CREATED);
4281
4282 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4283 if (!got
4284 || !bfd_set_section_alignment (abfd, got, 3))
4285 return FALSE;
4286
4287 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4288 flags | SEC_READONLY);
4289 if (!relgot
4290 || ! bfd_set_section_alignment (abfd, relgot, 3))
4291 return FALSE;
4292
4293 ppc64_elf_tdata (abfd)->got = got;
4294 ppc64_elf_tdata (abfd)->relgot = relgot;
4295 return TRUE;
4296 }
4297
4298 /* Create the dynamic sections, and set up shortcuts. */
4299
4300 static bfd_boolean
4301 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4302 {
4303 struct ppc_link_hash_table *htab;
4304
4305 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4306 return FALSE;
4307
4308 htab = ppc_hash_table (info);
4309 if (htab == NULL)
4310 return FALSE;
4311
4312 if (!htab->got)
4313 htab->got = bfd_get_section_by_name (dynobj, ".got");
4314 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4315 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4316 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4317 if (!info->shared)
4318 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4319
4320 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4321 || (!info->shared && !htab->relbss))
4322 abort ();
4323
4324 return TRUE;
4325 }
4326
4327 /* Follow indirect and warning symbol links. */
4328
4329 static inline struct bfd_link_hash_entry *
4330 follow_link (struct bfd_link_hash_entry *h)
4331 {
4332 while (h->type == bfd_link_hash_indirect
4333 || h->type == bfd_link_hash_warning)
4334 h = h->u.i.link;
4335 return h;
4336 }
4337
4338 static inline struct elf_link_hash_entry *
4339 elf_follow_link (struct elf_link_hash_entry *h)
4340 {
4341 return (struct elf_link_hash_entry *) follow_link (&h->root);
4342 }
4343
4344 static inline struct ppc_link_hash_entry *
4345 ppc_follow_link (struct ppc_link_hash_entry *h)
4346 {
4347 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4348 }
4349
4350 /* Merge PLT info on FROM with that on TO. */
4351
4352 static void
4353 move_plt_plist (struct ppc_link_hash_entry *from,
4354 struct ppc_link_hash_entry *to)
4355 {
4356 if (from->elf.plt.plist != NULL)
4357 {
4358 if (to->elf.plt.plist != NULL)
4359 {
4360 struct plt_entry **entp;
4361 struct plt_entry *ent;
4362
4363 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4364 {
4365 struct plt_entry *dent;
4366
4367 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4368 if (dent->addend == ent->addend)
4369 {
4370 dent->plt.refcount += ent->plt.refcount;
4371 *entp = ent->next;
4372 break;
4373 }
4374 if (dent == NULL)
4375 entp = &ent->next;
4376 }
4377 *entp = to->elf.plt.plist;
4378 }
4379
4380 to->elf.plt.plist = from->elf.plt.plist;
4381 from->elf.plt.plist = NULL;
4382 }
4383 }
4384
4385 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4386
4387 static void
4388 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4389 struct elf_link_hash_entry *dir,
4390 struct elf_link_hash_entry *ind)
4391 {
4392 struct ppc_link_hash_entry *edir, *eind;
4393
4394 edir = (struct ppc_link_hash_entry *) dir;
4395 eind = (struct ppc_link_hash_entry *) ind;
4396
4397 /* Copy over any dynamic relocs we may have on the indirect sym. */
4398 if (eind->dyn_relocs != NULL)
4399 {
4400 if (edir->dyn_relocs != NULL)
4401 {
4402 struct ppc_dyn_relocs **pp;
4403 struct ppc_dyn_relocs *p;
4404
4405 /* Add reloc counts against the indirect sym to the direct sym
4406 list. Merge any entries against the same section. */
4407 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4408 {
4409 struct ppc_dyn_relocs *q;
4410
4411 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4412 if (q->sec == p->sec)
4413 {
4414 q->pc_count += p->pc_count;
4415 q->count += p->count;
4416 *pp = p->next;
4417 break;
4418 }
4419 if (q == NULL)
4420 pp = &p->next;
4421 }
4422 *pp = edir->dyn_relocs;
4423 }
4424
4425 edir->dyn_relocs = eind->dyn_relocs;
4426 eind->dyn_relocs = NULL;
4427 }
4428
4429 edir->is_func |= eind->is_func;
4430 edir->is_func_descriptor |= eind->is_func_descriptor;
4431 edir->tls_mask |= eind->tls_mask;
4432 if (eind->oh != NULL)
4433 edir->oh = ppc_follow_link (eind->oh);
4434
4435 /* If called to transfer flags for a weakdef during processing
4436 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4437 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4438 if (!(ELIMINATE_COPY_RELOCS
4439 && eind->elf.root.type != bfd_link_hash_indirect
4440 && edir->elf.dynamic_adjusted))
4441 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4442
4443 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4444 edir->elf.ref_regular |= eind->elf.ref_regular;
4445 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4446 edir->elf.needs_plt |= eind->elf.needs_plt;
4447
4448 /* If we were called to copy over info for a weak sym, that's all. */
4449 if (eind->elf.root.type != bfd_link_hash_indirect)
4450 return;
4451
4452 /* Copy over got entries that we may have already seen to the
4453 symbol which just became indirect. */
4454 if (eind->elf.got.glist != NULL)
4455 {
4456 if (edir->elf.got.glist != NULL)
4457 {
4458 struct got_entry **entp;
4459 struct got_entry *ent;
4460
4461 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4462 {
4463 struct got_entry *dent;
4464
4465 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4466 if (dent->addend == ent->addend
4467 && dent->owner == ent->owner
4468 && dent->tls_type == ent->tls_type)
4469 {
4470 dent->got.refcount += ent->got.refcount;
4471 *entp = ent->next;
4472 break;
4473 }
4474 if (dent == NULL)
4475 entp = &ent->next;
4476 }
4477 *entp = edir->elf.got.glist;
4478 }
4479
4480 edir->elf.got.glist = eind->elf.got.glist;
4481 eind->elf.got.glist = NULL;
4482 }
4483
4484 /* And plt entries. */
4485 move_plt_plist (eind, edir);
4486
4487 if (eind->elf.dynindx != -1)
4488 {
4489 if (edir->elf.dynindx != -1)
4490 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4491 edir->elf.dynstr_index);
4492 edir->elf.dynindx = eind->elf.dynindx;
4493 edir->elf.dynstr_index = eind->elf.dynstr_index;
4494 eind->elf.dynindx = -1;
4495 eind->elf.dynstr_index = 0;
4496 }
4497 }
4498
4499 /* Find the function descriptor hash entry from the given function code
4500 hash entry FH. Link the entries via their OH fields. */
4501
4502 static struct ppc_link_hash_entry *
4503 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4504 {
4505 struct ppc_link_hash_entry *fdh = fh->oh;
4506
4507 if (fdh == NULL)
4508 {
4509 const char *fd_name = fh->elf.root.root.string + 1;
4510
4511 fdh = (struct ppc_link_hash_entry *)
4512 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4513 if (fdh == NULL)
4514 return fdh;
4515
4516 fdh->is_func_descriptor = 1;
4517 fdh->oh = fh;
4518 fh->is_func = 1;
4519 fh->oh = fdh;
4520 }
4521
4522 return ppc_follow_link (fdh);
4523 }
4524
4525 /* Make a fake function descriptor sym for the code sym FH. */
4526
4527 static struct ppc_link_hash_entry *
4528 make_fdh (struct bfd_link_info *info,
4529 struct ppc_link_hash_entry *fh)
4530 {
4531 bfd *abfd;
4532 asymbol *newsym;
4533 struct bfd_link_hash_entry *bh;
4534 struct ppc_link_hash_entry *fdh;
4535
4536 abfd = fh->elf.root.u.undef.abfd;
4537 newsym = bfd_make_empty_symbol (abfd);
4538 newsym->name = fh->elf.root.root.string + 1;
4539 newsym->section = bfd_und_section_ptr;
4540 newsym->value = 0;
4541 newsym->flags = BSF_WEAK;
4542
4543 bh = NULL;
4544 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4545 newsym->flags, newsym->section,
4546 newsym->value, NULL, FALSE, FALSE,
4547 &bh))
4548 return NULL;
4549
4550 fdh = (struct ppc_link_hash_entry *) bh;
4551 fdh->elf.non_elf = 0;
4552 fdh->fake = 1;
4553 fdh->is_func_descriptor = 1;
4554 fdh->oh = fh;
4555 fh->is_func = 1;
4556 fh->oh = fdh;
4557 return fdh;
4558 }
4559
4560 /* Fix function descriptor symbols defined in .opd sections to be
4561 function type. */
4562
4563 static bfd_boolean
4564 ppc64_elf_add_symbol_hook (bfd *ibfd,
4565 struct bfd_link_info *info,
4566 Elf_Internal_Sym *isym,
4567 const char **name ATTRIBUTE_UNUSED,
4568 flagword *flags ATTRIBUTE_UNUSED,
4569 asection **sec,
4570 bfd_vma *value ATTRIBUTE_UNUSED)
4571 {
4572 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4573 {
4574 if ((ibfd->flags & DYNAMIC) == 0)
4575 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4576 }
4577 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4578 ;
4579 else if (*sec != NULL
4580 && strcmp ((*sec)->name, ".opd") == 0)
4581 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4582
4583 return TRUE;
4584 }
4585
4586 /* This function makes an old ABI object reference to ".bar" cause the
4587 inclusion of a new ABI object archive that defines "bar".
4588 NAME is a symbol defined in an archive. Return a symbol in the hash
4589 table that might be satisfied by the archive symbols. */
4590
4591 static struct elf_link_hash_entry *
4592 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4593 struct bfd_link_info *info,
4594 const char *name)
4595 {
4596 struct elf_link_hash_entry *h;
4597 char *dot_name;
4598 size_t len;
4599
4600 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4601 if (h != NULL
4602 /* Don't return this sym if it is a fake function descriptor
4603 created by add_symbol_adjust. */
4604 && !(h->root.type == bfd_link_hash_undefweak
4605 && ((struct ppc_link_hash_entry *) h)->fake))
4606 return h;
4607
4608 if (name[0] == '.')
4609 return h;
4610
4611 len = strlen (name);
4612 dot_name = bfd_alloc (abfd, len + 2);
4613 if (dot_name == NULL)
4614 return (struct elf_link_hash_entry *) 0 - 1;
4615 dot_name[0] = '.';
4616 memcpy (dot_name + 1, name, len + 1);
4617 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4618 bfd_release (abfd, dot_name);
4619 return h;
4620 }
4621
4622 /* This function satisfies all old ABI object references to ".bar" if a
4623 new ABI object defines "bar". Well, at least, undefined dot symbols
4624 are made weak. This stops later archive searches from including an
4625 object if we already have a function descriptor definition. It also
4626 prevents the linker complaining about undefined symbols.
4627 We also check and correct mismatched symbol visibility here. The
4628 most restrictive visibility of the function descriptor and the
4629 function entry symbol is used. */
4630
4631 static bfd_boolean
4632 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4633 {
4634 struct ppc_link_hash_table *htab;
4635 struct ppc_link_hash_entry *fdh;
4636
4637 if (eh->elf.root.type == bfd_link_hash_indirect)
4638 return TRUE;
4639
4640 if (eh->elf.root.type == bfd_link_hash_warning)
4641 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4642
4643 if (eh->elf.root.root.string[0] != '.')
4644 abort ();
4645
4646 htab = ppc_hash_table (info);
4647 if (htab == NULL)
4648 return FALSE;
4649
4650 fdh = lookup_fdh (eh, htab);
4651 if (fdh == NULL)
4652 {
4653 if (!info->relocatable
4654 && (eh->elf.root.type == bfd_link_hash_undefined
4655 || eh->elf.root.type == bfd_link_hash_undefweak)
4656 && eh->elf.ref_regular)
4657 {
4658 /* Make an undefweak function descriptor sym, which is enough to
4659 pull in an --as-needed shared lib, but won't cause link
4660 errors. Archives are handled elsewhere. */
4661 fdh = make_fdh (info, eh);
4662 if (fdh == NULL)
4663 return FALSE;
4664 fdh->elf.ref_regular = 1;
4665 }
4666 }
4667 else
4668 {
4669 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4670 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4671 if (entry_vis < descr_vis)
4672 fdh->elf.other += entry_vis - descr_vis;
4673 else if (entry_vis > descr_vis)
4674 eh->elf.other += descr_vis - entry_vis;
4675
4676 if ((fdh->elf.root.type == bfd_link_hash_defined
4677 || fdh->elf.root.type == bfd_link_hash_defweak)
4678 && eh->elf.root.type == bfd_link_hash_undefined)
4679 {
4680 eh->elf.root.type = bfd_link_hash_undefweak;
4681 eh->was_undefined = 1;
4682 htab->twiddled_syms = 1;
4683 }
4684 }
4685
4686 return TRUE;
4687 }
4688
4689 /* Process list of dot-symbols we made in link_hash_newfunc. */
4690
4691 static bfd_boolean
4692 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4693 {
4694 struct ppc_link_hash_table *htab;
4695 struct ppc_link_hash_entry **p, *eh;
4696
4697 if (!is_ppc64_elf (info->output_bfd))
4698 return TRUE;
4699 htab = ppc_hash_table (info);
4700 if (htab == NULL)
4701 return FALSE;
4702
4703 if (is_ppc64_elf (ibfd))
4704 {
4705 p = &htab->dot_syms;
4706 while ((eh = *p) != NULL)
4707 {
4708 *p = NULL;
4709 if (!add_symbol_adjust (eh, info))
4710 return FALSE;
4711 p = &eh->u.next_dot_sym;
4712 }
4713 }
4714
4715 /* Clear the list for non-ppc64 input files. */
4716 p = &htab->dot_syms;
4717 while ((eh = *p) != NULL)
4718 {
4719 *p = NULL;
4720 p = &eh->u.next_dot_sym;
4721 }
4722
4723 /* We need to fix the undefs list for any syms we have twiddled to
4724 undef_weak. */
4725 if (htab->twiddled_syms)
4726 {
4727 bfd_link_repair_undef_list (&htab->elf.root);
4728 htab->twiddled_syms = 0;
4729 }
4730 return TRUE;
4731 }
4732
4733 /* Undo hash table changes when an --as-needed input file is determined
4734 not to be needed. */
4735
4736 static bfd_boolean
4737 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4738 struct bfd_link_info *info)
4739 {
4740 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4741
4742 if (htab == NULL)
4743 return FALSE;
4744
4745 htab->dot_syms = NULL;
4746 return TRUE;
4747 }
4748
4749 /* If --just-symbols against a final linked binary, then assume we need
4750 toc adjusting stubs when calling functions defined there. */
4751
4752 static void
4753 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4754 {
4755 if ((sec->flags & SEC_CODE) != 0
4756 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4757 && is_ppc64_elf (sec->owner))
4758 {
4759 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4760 if (got != NULL
4761 && got->size >= elf_backend_got_header_size
4762 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4763 sec->has_toc_reloc = 1;
4764 }
4765 _bfd_elf_link_just_syms (sec, info);
4766 }
4767
4768 static struct plt_entry **
4769 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4770 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4771 {
4772 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4773 struct plt_entry **local_plt;
4774 unsigned char *local_got_tls_masks;
4775
4776 if (local_got_ents == NULL)
4777 {
4778 bfd_size_type size = symtab_hdr->sh_info;
4779
4780 size *= (sizeof (*local_got_ents)
4781 + sizeof (*local_plt)
4782 + sizeof (*local_got_tls_masks));
4783 local_got_ents = bfd_zalloc (abfd, size);
4784 if (local_got_ents == NULL)
4785 return NULL;
4786 elf_local_got_ents (abfd) = local_got_ents;
4787 }
4788
4789 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4790 {
4791 struct got_entry *ent;
4792
4793 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4794 if (ent->addend == r_addend
4795 && ent->owner == abfd
4796 && ent->tls_type == tls_type)
4797 break;
4798 if (ent == NULL)
4799 {
4800 bfd_size_type amt = sizeof (*ent);
4801 ent = bfd_alloc (abfd, amt);
4802 if (ent == NULL)
4803 return FALSE;
4804 ent->next = local_got_ents[r_symndx];
4805 ent->addend = r_addend;
4806 ent->owner = abfd;
4807 ent->tls_type = tls_type;
4808 ent->is_indirect = FALSE;
4809 ent->got.refcount = 0;
4810 local_got_ents[r_symndx] = ent;
4811 }
4812 ent->got.refcount += 1;
4813 }
4814
4815 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4816 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4817 local_got_tls_masks[r_symndx] |= tls_type;
4818
4819 return local_plt + r_symndx;
4820 }
4821
4822 static bfd_boolean
4823 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4824 {
4825 struct plt_entry *ent;
4826
4827 for (ent = *plist; ent != NULL; ent = ent->next)
4828 if (ent->addend == addend)
4829 break;
4830 if (ent == NULL)
4831 {
4832 bfd_size_type amt = sizeof (*ent);
4833 ent = bfd_alloc (abfd, amt);
4834 if (ent == NULL)
4835 return FALSE;
4836 ent->next = *plist;
4837 ent->addend = addend;
4838 ent->plt.refcount = 0;
4839 *plist = ent;
4840 }
4841 ent->plt.refcount += 1;
4842 return TRUE;
4843 }
4844
4845 static bfd_boolean
4846 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4847 {
4848 return (r_type == R_PPC64_REL24
4849 || r_type == R_PPC64_REL14
4850 || r_type == R_PPC64_REL14_BRTAKEN
4851 || r_type == R_PPC64_REL14_BRNTAKEN
4852 || r_type == R_PPC64_ADDR24
4853 || r_type == R_PPC64_ADDR14
4854 || r_type == R_PPC64_ADDR14_BRTAKEN
4855 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4856 }
4857
4858 /* Look through the relocs for a section during the first phase, and
4859 calculate needed space in the global offset table, procedure
4860 linkage table, and dynamic reloc sections. */
4861
4862 static bfd_boolean
4863 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4864 asection *sec, const Elf_Internal_Rela *relocs)
4865 {
4866 struct ppc_link_hash_table *htab;
4867 Elf_Internal_Shdr *symtab_hdr;
4868 struct elf_link_hash_entry **sym_hashes;
4869 const Elf_Internal_Rela *rel;
4870 const Elf_Internal_Rela *rel_end;
4871 asection *sreloc;
4872 asection **opd_sym_map;
4873 struct elf_link_hash_entry *tga, *dottga;
4874
4875 if (info->relocatable)
4876 return TRUE;
4877
4878 /* Don't do anything special with non-loaded, non-alloced sections.
4879 In particular, any relocs in such sections should not affect GOT
4880 and PLT reference counting (ie. we don't allow them to create GOT
4881 or PLT entries), there's no possibility or desire to optimize TLS
4882 relocs, and there's not much point in propagating relocs to shared
4883 libs that the dynamic linker won't relocate. */
4884 if ((sec->flags & SEC_ALLOC) == 0)
4885 return TRUE;
4886
4887 BFD_ASSERT (is_ppc64_elf (abfd));
4888
4889 htab = ppc_hash_table (info);
4890 if (htab == NULL)
4891 return FALSE;
4892
4893 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4894 FALSE, FALSE, TRUE);
4895 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4896 FALSE, FALSE, TRUE);
4897 symtab_hdr = &elf_symtab_hdr (abfd);
4898 sym_hashes = elf_sym_hashes (abfd);
4899 sreloc = NULL;
4900 opd_sym_map = NULL;
4901 if (strcmp (sec->name, ".opd") == 0)
4902 {
4903 /* Garbage collection needs some extra help with .opd sections.
4904 We don't want to necessarily keep everything referenced by
4905 relocs in .opd, as that would keep all functions. Instead,
4906 if we reference an .opd symbol (a function descriptor), we
4907 want to keep the function code symbol's section. This is
4908 easy for global symbols, but for local syms we need to keep
4909 information about the associated function section. */
4910 bfd_size_type amt;
4911
4912 amt = sec->size * sizeof (*opd_sym_map) / 8;
4913 opd_sym_map = bfd_zalloc (abfd, amt);
4914 if (opd_sym_map == NULL)
4915 return FALSE;
4916 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4917 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4918 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4919 }
4920
4921 if (htab->sfpr == NULL
4922 && !create_linkage_sections (htab->elf.dynobj, info))
4923 return FALSE;
4924
4925 rel_end = relocs + sec->reloc_count;
4926 for (rel = relocs; rel < rel_end; rel++)
4927 {
4928 unsigned long r_symndx;
4929 struct elf_link_hash_entry *h;
4930 enum elf_ppc64_reloc_type r_type;
4931 int tls_type;
4932 struct _ppc64_elf_section_data *ppc64_sec;
4933 struct plt_entry **ifunc;
4934
4935 r_symndx = ELF64_R_SYM (rel->r_info);
4936 if (r_symndx < symtab_hdr->sh_info)
4937 h = NULL;
4938 else
4939 {
4940 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4941 h = elf_follow_link (h);
4942 }
4943
4944 tls_type = 0;
4945 ifunc = NULL;
4946 if (h != NULL)
4947 {
4948 if (h->type == STT_GNU_IFUNC)
4949 {
4950 h->needs_plt = 1;
4951 ifunc = &h->plt.plist;
4952 }
4953 }
4954 else
4955 {
4956 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4957 abfd, r_symndx);
4958 if (isym == NULL)
4959 return FALSE;
4960
4961 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4962 {
4963 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4964 rel->r_addend, PLT_IFUNC);
4965 if (ifunc == NULL)
4966 return FALSE;
4967 }
4968 }
4969 r_type = ELF64_R_TYPE (rel->r_info);
4970 if (is_branch_reloc (r_type))
4971 {
4972 if (h != NULL && (h == tga || h == dottga))
4973 {
4974 if (rel != relocs
4975 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4976 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4977 /* We have a new-style __tls_get_addr call with a marker
4978 reloc. */
4979 ;
4980 else
4981 /* Mark this section as having an old-style call. */
4982 sec->has_tls_get_addr_call = 1;
4983 }
4984
4985 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4986 if (ifunc != NULL
4987 && !update_plt_info (abfd, ifunc, rel->r_addend))
4988 return FALSE;
4989 }
4990
4991 switch (r_type)
4992 {
4993 case R_PPC64_TLSGD:
4994 case R_PPC64_TLSLD:
4995 /* These special tls relocs tie a call to __tls_get_addr with
4996 its parameter symbol. */
4997 break;
4998
4999 case R_PPC64_GOT_TLSLD16:
5000 case R_PPC64_GOT_TLSLD16_LO:
5001 case R_PPC64_GOT_TLSLD16_HI:
5002 case R_PPC64_GOT_TLSLD16_HA:
5003 tls_type = TLS_TLS | TLS_LD;
5004 goto dogottls;
5005
5006 case R_PPC64_GOT_TLSGD16:
5007 case R_PPC64_GOT_TLSGD16_LO:
5008 case R_PPC64_GOT_TLSGD16_HI:
5009 case R_PPC64_GOT_TLSGD16_HA:
5010 tls_type = TLS_TLS | TLS_GD;
5011 goto dogottls;
5012
5013 case R_PPC64_GOT_TPREL16_DS:
5014 case R_PPC64_GOT_TPREL16_LO_DS:
5015 case R_PPC64_GOT_TPREL16_HI:
5016 case R_PPC64_GOT_TPREL16_HA:
5017 if (!info->executable)
5018 info->flags |= DF_STATIC_TLS;
5019 tls_type = TLS_TLS | TLS_TPREL;
5020 goto dogottls;
5021
5022 case R_PPC64_GOT_DTPREL16_DS:
5023 case R_PPC64_GOT_DTPREL16_LO_DS:
5024 case R_PPC64_GOT_DTPREL16_HI:
5025 case R_PPC64_GOT_DTPREL16_HA:
5026 tls_type = TLS_TLS | TLS_DTPREL;
5027 dogottls:
5028 sec->has_tls_reloc = 1;
5029 /* Fall thru */
5030
5031 case R_PPC64_GOT16:
5032 case R_PPC64_GOT16_DS:
5033 case R_PPC64_GOT16_HA:
5034 case R_PPC64_GOT16_HI:
5035 case R_PPC64_GOT16_LO:
5036 case R_PPC64_GOT16_LO_DS:
5037 /* This symbol requires a global offset table entry. */
5038 sec->has_toc_reloc = 1;
5039 if (r_type == R_PPC64_GOT_TLSLD16
5040 || r_type == R_PPC64_GOT_TLSGD16
5041 || r_type == R_PPC64_GOT_TPREL16_DS
5042 || r_type == R_PPC64_GOT_DTPREL16_DS
5043 || r_type == R_PPC64_GOT16
5044 || r_type == R_PPC64_GOT16_DS)
5045 {
5046 htab->do_multi_toc = 1;
5047 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5048 }
5049
5050 if (ppc64_elf_tdata (abfd)->got == NULL
5051 && !create_got_section (abfd, info))
5052 return FALSE;
5053
5054 if (h != NULL)
5055 {
5056 struct ppc_link_hash_entry *eh;
5057 struct got_entry *ent;
5058
5059 eh = (struct ppc_link_hash_entry *) h;
5060 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5061 if (ent->addend == rel->r_addend
5062 && ent->owner == abfd
5063 && ent->tls_type == tls_type)
5064 break;
5065 if (ent == NULL)
5066 {
5067 bfd_size_type amt = sizeof (*ent);
5068 ent = bfd_alloc (abfd, amt);
5069 if (ent == NULL)
5070 return FALSE;
5071 ent->next = eh->elf.got.glist;
5072 ent->addend = rel->r_addend;
5073 ent->owner = abfd;
5074 ent->tls_type = tls_type;
5075 ent->is_indirect = FALSE;
5076 ent->got.refcount = 0;
5077 eh->elf.got.glist = ent;
5078 }
5079 ent->got.refcount += 1;
5080 eh->tls_mask |= tls_type;
5081 }
5082 else
5083 /* This is a global offset table entry for a local symbol. */
5084 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5085 rel->r_addend, tls_type))
5086 return FALSE;
5087 break;
5088
5089 case R_PPC64_PLT16_HA:
5090 case R_PPC64_PLT16_HI:
5091 case R_PPC64_PLT16_LO:
5092 case R_PPC64_PLT32:
5093 case R_PPC64_PLT64:
5094 /* This symbol requires a procedure linkage table entry. We
5095 actually build the entry in adjust_dynamic_symbol,
5096 because this might be a case of linking PIC code without
5097 linking in any dynamic objects, in which case we don't
5098 need to generate a procedure linkage table after all. */
5099 if (h == NULL)
5100 {
5101 /* It does not make sense to have a procedure linkage
5102 table entry for a local symbol. */
5103 bfd_set_error (bfd_error_bad_value);
5104 return FALSE;
5105 }
5106 else
5107 {
5108 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5109 return FALSE;
5110 h->needs_plt = 1;
5111 if (h->root.root.string[0] == '.'
5112 && h->root.root.string[1] != '\0')
5113 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5114 }
5115 break;
5116
5117 /* The following relocations don't need to propagate the
5118 relocation if linking a shared object since they are
5119 section relative. */
5120 case R_PPC64_SECTOFF:
5121 case R_PPC64_SECTOFF_LO:
5122 case R_PPC64_SECTOFF_HI:
5123 case R_PPC64_SECTOFF_HA:
5124 case R_PPC64_SECTOFF_DS:
5125 case R_PPC64_SECTOFF_LO_DS:
5126 case R_PPC64_DTPREL16:
5127 case R_PPC64_DTPREL16_LO:
5128 case R_PPC64_DTPREL16_HI:
5129 case R_PPC64_DTPREL16_HA:
5130 case R_PPC64_DTPREL16_DS:
5131 case R_PPC64_DTPREL16_LO_DS:
5132 case R_PPC64_DTPREL16_HIGHER:
5133 case R_PPC64_DTPREL16_HIGHERA:
5134 case R_PPC64_DTPREL16_HIGHEST:
5135 case R_PPC64_DTPREL16_HIGHESTA:
5136 break;
5137
5138 /* Nor do these. */
5139 case R_PPC64_REL16:
5140 case R_PPC64_REL16_LO:
5141 case R_PPC64_REL16_HI:
5142 case R_PPC64_REL16_HA:
5143 break;
5144
5145 case R_PPC64_TOC16:
5146 case R_PPC64_TOC16_DS:
5147 htab->do_multi_toc = 1;
5148 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5149 case R_PPC64_TOC16_LO:
5150 case R_PPC64_TOC16_HI:
5151 case R_PPC64_TOC16_HA:
5152 case R_PPC64_TOC16_LO_DS:
5153 sec->has_toc_reloc = 1;
5154 break;
5155
5156 /* This relocation describes the C++ object vtable hierarchy.
5157 Reconstruct it for later use during GC. */
5158 case R_PPC64_GNU_VTINHERIT:
5159 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5160 return FALSE;
5161 break;
5162
5163 /* This relocation describes which C++ vtable entries are actually
5164 used. Record for later use during GC. */
5165 case R_PPC64_GNU_VTENTRY:
5166 BFD_ASSERT (h != NULL);
5167 if (h != NULL
5168 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5169 return FALSE;
5170 break;
5171
5172 case R_PPC64_REL14:
5173 case R_PPC64_REL14_BRTAKEN:
5174 case R_PPC64_REL14_BRNTAKEN:
5175 {
5176 asection *dest = NULL;
5177
5178 /* Heuristic: If jumping outside our section, chances are
5179 we are going to need a stub. */
5180 if (h != NULL)
5181 {
5182 /* If the sym is weak it may be overridden later, so
5183 don't assume we know where a weak sym lives. */
5184 if (h->root.type == bfd_link_hash_defined)
5185 dest = h->root.u.def.section;
5186 }
5187 else
5188 {
5189 Elf_Internal_Sym *isym;
5190
5191 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5192 abfd, r_symndx);
5193 if (isym == NULL)
5194 return FALSE;
5195
5196 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5197 }
5198
5199 if (dest != sec)
5200 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5201 }
5202 /* Fall through. */
5203
5204 case R_PPC64_REL24:
5205 if (h != NULL && ifunc == NULL)
5206 {
5207 /* We may need a .plt entry if the function this reloc
5208 refers to is in a shared lib. */
5209 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5210 return FALSE;
5211 h->needs_plt = 1;
5212 if (h->root.root.string[0] == '.'
5213 && h->root.root.string[1] != '\0')
5214 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5215 if (h == tga || h == dottga)
5216 sec->has_tls_reloc = 1;
5217 }
5218 break;
5219
5220 case R_PPC64_TPREL64:
5221 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5222 if (!info->executable)
5223 info->flags |= DF_STATIC_TLS;
5224 goto dotlstoc;
5225
5226 case R_PPC64_DTPMOD64:
5227 if (rel + 1 < rel_end
5228 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5229 && rel[1].r_offset == rel->r_offset + 8)
5230 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5231 else
5232 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5233 goto dotlstoc;
5234
5235 case R_PPC64_DTPREL64:
5236 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5237 if (rel != relocs
5238 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5239 && rel[-1].r_offset == rel->r_offset - 8)
5240 /* This is the second reloc of a dtpmod, dtprel pair.
5241 Don't mark with TLS_DTPREL. */
5242 goto dodyn;
5243
5244 dotlstoc:
5245 sec->has_tls_reloc = 1;
5246 if (h != NULL)
5247 {
5248 struct ppc_link_hash_entry *eh;
5249 eh = (struct ppc_link_hash_entry *) h;
5250 eh->tls_mask |= tls_type;
5251 }
5252 else
5253 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5254 rel->r_addend, tls_type))
5255 return FALSE;
5256
5257 ppc64_sec = ppc64_elf_section_data (sec);
5258 if (ppc64_sec->sec_type != sec_toc)
5259 {
5260 bfd_size_type amt;
5261
5262 /* One extra to simplify get_tls_mask. */
5263 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5264 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5265 if (ppc64_sec->u.toc.symndx == NULL)
5266 return FALSE;
5267 amt = sec->size * sizeof (bfd_vma) / 8;
5268 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5269 if (ppc64_sec->u.toc.add == NULL)
5270 return FALSE;
5271 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5272 ppc64_sec->sec_type = sec_toc;
5273 }
5274 BFD_ASSERT (rel->r_offset % 8 == 0);
5275 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5276 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5277
5278 /* Mark the second slot of a GD or LD entry.
5279 -1 to indicate GD and -2 to indicate LD. */
5280 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5281 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5282 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5283 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5284 goto dodyn;
5285
5286 case R_PPC64_TPREL16:
5287 case R_PPC64_TPREL16_LO:
5288 case R_PPC64_TPREL16_HI:
5289 case R_PPC64_TPREL16_HA:
5290 case R_PPC64_TPREL16_DS:
5291 case R_PPC64_TPREL16_LO_DS:
5292 case R_PPC64_TPREL16_HIGHER:
5293 case R_PPC64_TPREL16_HIGHERA:
5294 case R_PPC64_TPREL16_HIGHEST:
5295 case R_PPC64_TPREL16_HIGHESTA:
5296 if (info->shared)
5297 {
5298 if (!info->executable)
5299 info->flags |= DF_STATIC_TLS;
5300 goto dodyn;
5301 }
5302 break;
5303
5304 case R_PPC64_ADDR64:
5305 if (opd_sym_map != NULL
5306 && rel + 1 < rel_end
5307 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5308 {
5309 if (h != NULL)
5310 {
5311 if (h->root.root.string[0] == '.'
5312 && h->root.root.string[1] != 0
5313 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5314 ;
5315 else
5316 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5317 }
5318 else
5319 {
5320 asection *s;
5321 Elf_Internal_Sym *isym;
5322
5323 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5324 abfd, r_symndx);
5325 if (isym == NULL)
5326 return FALSE;
5327
5328 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5329 if (s != NULL && s != sec)
5330 opd_sym_map[rel->r_offset / 8] = s;
5331 }
5332 }
5333 /* Fall through. */
5334
5335 case R_PPC64_REL30:
5336 case R_PPC64_REL32:
5337 case R_PPC64_REL64:
5338 case R_PPC64_ADDR14:
5339 case R_PPC64_ADDR14_BRNTAKEN:
5340 case R_PPC64_ADDR14_BRTAKEN:
5341 case R_PPC64_ADDR16:
5342 case R_PPC64_ADDR16_DS:
5343 case R_PPC64_ADDR16_HA:
5344 case R_PPC64_ADDR16_HI:
5345 case R_PPC64_ADDR16_HIGHER:
5346 case R_PPC64_ADDR16_HIGHERA:
5347 case R_PPC64_ADDR16_HIGHEST:
5348 case R_PPC64_ADDR16_HIGHESTA:
5349 case R_PPC64_ADDR16_LO:
5350 case R_PPC64_ADDR16_LO_DS:
5351 case R_PPC64_ADDR24:
5352 case R_PPC64_ADDR32:
5353 case R_PPC64_UADDR16:
5354 case R_PPC64_UADDR32:
5355 case R_PPC64_UADDR64:
5356 case R_PPC64_TOC:
5357 if (h != NULL && !info->shared)
5358 /* We may need a copy reloc. */
5359 h->non_got_ref = 1;
5360
5361 /* Don't propagate .opd relocs. */
5362 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5363 break;
5364
5365 /* If we are creating a shared library, and this is a reloc
5366 against a global symbol, or a non PC relative reloc
5367 against a local symbol, then we need to copy the reloc
5368 into the shared library. However, if we are linking with
5369 -Bsymbolic, we do not need to copy a reloc against a
5370 global symbol which is defined in an object we are
5371 including in the link (i.e., DEF_REGULAR is set). At
5372 this point we have not seen all the input files, so it is
5373 possible that DEF_REGULAR is not set now but will be set
5374 later (it is never cleared). In case of a weak definition,
5375 DEF_REGULAR may be cleared later by a strong definition in
5376 a shared library. We account for that possibility below by
5377 storing information in the dyn_relocs field of the hash
5378 table entry. A similar situation occurs when creating
5379 shared libraries and symbol visibility changes render the
5380 symbol local.
5381
5382 If on the other hand, we are creating an executable, we
5383 may need to keep relocations for symbols satisfied by a
5384 dynamic library if we manage to avoid copy relocs for the
5385 symbol. */
5386 dodyn:
5387 if ((info->shared
5388 && (must_be_dyn_reloc (info, r_type)
5389 || (h != NULL
5390 && (! info->symbolic
5391 || h->root.type == bfd_link_hash_defweak
5392 || !h->def_regular))))
5393 || (ELIMINATE_COPY_RELOCS
5394 && !info->shared
5395 && h != NULL
5396 && (h->root.type == bfd_link_hash_defweak
5397 || !h->def_regular))
5398 || (!info->shared
5399 && ifunc != NULL))
5400 {
5401 struct ppc_dyn_relocs *p;
5402 struct ppc_dyn_relocs **head;
5403
5404 /* We must copy these reloc types into the output file.
5405 Create a reloc section in dynobj and make room for
5406 this reloc. */
5407 if (sreloc == NULL)
5408 {
5409 sreloc = _bfd_elf_make_dynamic_reloc_section
5410 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5411
5412 if (sreloc == NULL)
5413 return FALSE;
5414 }
5415
5416 /* If this is a global symbol, we count the number of
5417 relocations we need for this symbol. */
5418 if (h != NULL)
5419 {
5420 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5421 }
5422 else
5423 {
5424 /* Track dynamic relocs needed for local syms too.
5425 We really need local syms available to do this
5426 easily. Oh well. */
5427 asection *s;
5428 void *vpp;
5429 Elf_Internal_Sym *isym;
5430
5431 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5432 abfd, r_symndx);
5433 if (isym == NULL)
5434 return FALSE;
5435
5436 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5437 if (s == NULL)
5438 s = sec;
5439
5440 vpp = &elf_section_data (s)->local_dynrel;
5441 head = (struct ppc_dyn_relocs **) vpp;
5442 }
5443
5444 p = *head;
5445 if (p == NULL || p->sec != sec)
5446 {
5447 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5448 if (p == NULL)
5449 return FALSE;
5450 p->next = *head;
5451 *head = p;
5452 p->sec = sec;
5453 p->count = 0;
5454 p->pc_count = 0;
5455 }
5456
5457 p->count += 1;
5458 if (!must_be_dyn_reloc (info, r_type))
5459 p->pc_count += 1;
5460 }
5461 break;
5462
5463 default:
5464 break;
5465 }
5466 }
5467
5468 return TRUE;
5469 }
5470
5471 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5472 of the code entry point, and its section. */
5473
5474 static bfd_vma
5475 opd_entry_value (asection *opd_sec,
5476 bfd_vma offset,
5477 asection **code_sec,
5478 bfd_vma *code_off)
5479 {
5480 bfd *opd_bfd = opd_sec->owner;
5481 Elf_Internal_Rela *relocs;
5482 Elf_Internal_Rela *lo, *hi, *look;
5483 bfd_vma val;
5484
5485 /* No relocs implies we are linking a --just-symbols object. */
5486 if (opd_sec->reloc_count == 0)
5487 {
5488 char buf[8];
5489
5490 if (!bfd_get_section_contents (opd_bfd, opd_sec, buf, offset, 8))
5491 return (bfd_vma) -1;
5492
5493 val = bfd_get_64 (opd_bfd, buf);
5494 if (code_sec != NULL)
5495 {
5496 asection *sec, *likely = NULL;
5497 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5498 if (sec->vma <= val
5499 && (sec->flags & SEC_LOAD) != 0
5500 && (sec->flags & SEC_ALLOC) != 0)
5501 likely = sec;
5502 if (likely != NULL)
5503 {
5504 *code_sec = likely;
5505 if (code_off != NULL)
5506 *code_off = val - likely->vma;
5507 }
5508 }
5509 return val;
5510 }
5511
5512 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5513
5514 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5515 if (relocs == NULL)
5516 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5517
5518 /* Go find the opd reloc at the sym address. */
5519 lo = relocs;
5520 BFD_ASSERT (lo != NULL);
5521 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5522 val = (bfd_vma) -1;
5523 while (lo < hi)
5524 {
5525 look = lo + (hi - lo) / 2;
5526 if (look->r_offset < offset)
5527 lo = look + 1;
5528 else if (look->r_offset > offset)
5529 hi = look;
5530 else
5531 {
5532 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5533
5534 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5535 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5536 {
5537 unsigned long symndx = ELF64_R_SYM (look->r_info);
5538 asection *sec;
5539
5540 if (symndx < symtab_hdr->sh_info)
5541 {
5542 Elf_Internal_Sym *sym;
5543
5544 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5545 if (sym == NULL)
5546 {
5547 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5548 symtab_hdr->sh_info,
5549 0, NULL, NULL, NULL);
5550 if (sym == NULL)
5551 break;
5552 symtab_hdr->contents = (bfd_byte *) sym;
5553 }
5554
5555 sym += symndx;
5556 val = sym->st_value;
5557 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5558 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5559 }
5560 else
5561 {
5562 struct elf_link_hash_entry **sym_hashes;
5563 struct elf_link_hash_entry *rh;
5564
5565 sym_hashes = elf_sym_hashes (opd_bfd);
5566 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5567 rh = elf_follow_link (rh);
5568 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5569 || rh->root.type == bfd_link_hash_defweak);
5570 val = rh->root.u.def.value;
5571 sec = rh->root.u.def.section;
5572 }
5573 val += look->r_addend;
5574 if (code_off != NULL)
5575 *code_off = val;
5576 if (code_sec != NULL)
5577 *code_sec = sec;
5578 if (sec != NULL && sec->output_section != NULL)
5579 val += sec->output_section->vma + sec->output_offset;
5580 }
5581 break;
5582 }
5583 }
5584
5585 return val;
5586 }
5587
5588 /* Return true if symbol is defined in a regular object file. */
5589
5590 static bfd_boolean
5591 is_static_defined (struct elf_link_hash_entry *h)
5592 {
5593 return ((h->root.type == bfd_link_hash_defined
5594 || h->root.type == bfd_link_hash_defweak)
5595 && h->root.u.def.section != NULL
5596 && h->root.u.def.section->output_section != NULL);
5597 }
5598
5599 /* If FDH is a function descriptor symbol, return the associated code
5600 entry symbol if it is defined. Return NULL otherwise. */
5601
5602 static struct ppc_link_hash_entry *
5603 defined_code_entry (struct ppc_link_hash_entry *fdh)
5604 {
5605 if (fdh->is_func_descriptor)
5606 {
5607 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5608 if (fh->elf.root.type == bfd_link_hash_defined
5609 || fh->elf.root.type == bfd_link_hash_defweak)
5610 return fh;
5611 }
5612 return NULL;
5613 }
5614
5615 /* If FH is a function code entry symbol, return the associated
5616 function descriptor symbol if it is defined. Return NULL otherwise. */
5617
5618 static struct ppc_link_hash_entry *
5619 defined_func_desc (struct ppc_link_hash_entry *fh)
5620 {
5621 if (fh->oh != NULL
5622 && fh->oh->is_func_descriptor)
5623 {
5624 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5625 if (fdh->elf.root.type == bfd_link_hash_defined
5626 || fdh->elf.root.type == bfd_link_hash_defweak)
5627 return fdh;
5628 }
5629 return NULL;
5630 }
5631
5632 /* Mark all our entry sym sections, both opd and code section. */
5633
5634 static void
5635 ppc64_elf_gc_keep (struct bfd_link_info *info)
5636 {
5637 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5638 struct bfd_sym_chain *sym;
5639
5640 if (htab == NULL)
5641 return;
5642
5643 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5644 {
5645 struct ppc_link_hash_entry *eh, *fh;
5646 asection *sec;
5647
5648 eh = (struct ppc_link_hash_entry *)
5649 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5650 if (eh == NULL)
5651 continue;
5652 if (eh->elf.root.type != bfd_link_hash_defined
5653 && eh->elf.root.type != bfd_link_hash_defweak)
5654 continue;
5655
5656 fh = defined_code_entry (eh);
5657 if (fh != NULL)
5658 {
5659 sec = fh->elf.root.u.def.section;
5660 sec->flags |= SEC_KEEP;
5661 }
5662 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5663 && opd_entry_value (eh->elf.root.u.def.section,
5664 eh->elf.root.u.def.value,
5665 &sec, NULL) != (bfd_vma) -1)
5666 sec->flags |= SEC_KEEP;
5667
5668 sec = eh->elf.root.u.def.section;
5669 sec->flags |= SEC_KEEP;
5670 }
5671 }
5672
5673 /* Mark sections containing dynamically referenced symbols. When
5674 building shared libraries, we must assume that any visible symbol is
5675 referenced. */
5676
5677 static bfd_boolean
5678 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5679 {
5680 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5681 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5682 struct ppc_link_hash_entry *fdh;
5683
5684 if (eh->elf.root.type == bfd_link_hash_warning)
5685 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5686
5687 /* Dynamic linking info is on the func descriptor sym. */
5688 fdh = defined_func_desc (eh);
5689 if (fdh != NULL)
5690 eh = fdh;
5691
5692 if ((eh->elf.root.type == bfd_link_hash_defined
5693 || eh->elf.root.type == bfd_link_hash_defweak)
5694 && (eh->elf.ref_dynamic
5695 || (!info->executable
5696 && eh->elf.def_regular
5697 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5698 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5699 {
5700 asection *code_sec;
5701 struct ppc_link_hash_entry *fh;
5702
5703 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5704
5705 /* Function descriptor syms cause the associated
5706 function code sym section to be marked. */
5707 fh = defined_code_entry (eh);
5708 if (fh != NULL)
5709 {
5710 code_sec = fh->elf.root.u.def.section;
5711 code_sec->flags |= SEC_KEEP;
5712 }
5713 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5714 && opd_entry_value (eh->elf.root.u.def.section,
5715 eh->elf.root.u.def.value,
5716 &code_sec, NULL) != (bfd_vma) -1)
5717 code_sec->flags |= SEC_KEEP;
5718 }
5719
5720 return TRUE;
5721 }
5722
5723 /* Return the section that should be marked against GC for a given
5724 relocation. */
5725
5726 static asection *
5727 ppc64_elf_gc_mark_hook (asection *sec,
5728 struct bfd_link_info *info,
5729 Elf_Internal_Rela *rel,
5730 struct elf_link_hash_entry *h,
5731 Elf_Internal_Sym *sym)
5732 {
5733 asection *rsec;
5734
5735 /* Syms return NULL if we're marking .opd, so we avoid marking all
5736 function sections, as all functions are referenced in .opd. */
5737 rsec = NULL;
5738 if (get_opd_info (sec) != NULL)
5739 return rsec;
5740
5741 if (h != NULL)
5742 {
5743 enum elf_ppc64_reloc_type r_type;
5744 struct ppc_link_hash_entry *eh, *fh, *fdh;
5745
5746 r_type = ELF64_R_TYPE (rel->r_info);
5747 switch (r_type)
5748 {
5749 case R_PPC64_GNU_VTINHERIT:
5750 case R_PPC64_GNU_VTENTRY:
5751 break;
5752
5753 default:
5754 switch (h->root.type)
5755 {
5756 case bfd_link_hash_defined:
5757 case bfd_link_hash_defweak:
5758 eh = (struct ppc_link_hash_entry *) h;
5759 fdh = defined_func_desc (eh);
5760 if (fdh != NULL)
5761 eh = fdh;
5762
5763 /* Function descriptor syms cause the associated
5764 function code sym section to be marked. */
5765 fh = defined_code_entry (eh);
5766 if (fh != NULL)
5767 {
5768 /* They also mark their opd section. */
5769 eh->elf.root.u.def.section->gc_mark = 1;
5770
5771 rsec = fh->elf.root.u.def.section;
5772 }
5773 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5774 && opd_entry_value (eh->elf.root.u.def.section,
5775 eh->elf.root.u.def.value,
5776 &rsec, NULL) != (bfd_vma) -1)
5777 eh->elf.root.u.def.section->gc_mark = 1;
5778 else
5779 rsec = h->root.u.def.section;
5780 break;
5781
5782 case bfd_link_hash_common:
5783 rsec = h->root.u.c.p->section;
5784 break;
5785
5786 default:
5787 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5788 }
5789 }
5790 }
5791 else
5792 {
5793 struct _opd_sec_data *opd;
5794
5795 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5796 opd = get_opd_info (rsec);
5797 if (opd != NULL && opd->func_sec != NULL)
5798 {
5799 rsec->gc_mark = 1;
5800
5801 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5802 }
5803 }
5804
5805 return rsec;
5806 }
5807
5808 /* Update the .got, .plt. and dynamic reloc reference counts for the
5809 section being removed. */
5810
5811 static bfd_boolean
5812 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5813 asection *sec, const Elf_Internal_Rela *relocs)
5814 {
5815 struct ppc_link_hash_table *htab;
5816 Elf_Internal_Shdr *symtab_hdr;
5817 struct elf_link_hash_entry **sym_hashes;
5818 struct got_entry **local_got_ents;
5819 const Elf_Internal_Rela *rel, *relend;
5820
5821 if (info->relocatable)
5822 return TRUE;
5823
5824 if ((sec->flags & SEC_ALLOC) == 0)
5825 return TRUE;
5826
5827 elf_section_data (sec)->local_dynrel = NULL;
5828
5829 htab = ppc_hash_table (info);
5830 if (htab == NULL)
5831 return FALSE;
5832
5833 symtab_hdr = &elf_symtab_hdr (abfd);
5834 sym_hashes = elf_sym_hashes (abfd);
5835 local_got_ents = elf_local_got_ents (abfd);
5836
5837 relend = relocs + sec->reloc_count;
5838 for (rel = relocs; rel < relend; rel++)
5839 {
5840 unsigned long r_symndx;
5841 enum elf_ppc64_reloc_type r_type;
5842 struct elf_link_hash_entry *h = NULL;
5843 unsigned char tls_type = 0;
5844
5845 r_symndx = ELF64_R_SYM (rel->r_info);
5846 r_type = ELF64_R_TYPE (rel->r_info);
5847 if (r_symndx >= symtab_hdr->sh_info)
5848 {
5849 struct ppc_link_hash_entry *eh;
5850 struct ppc_dyn_relocs **pp;
5851 struct ppc_dyn_relocs *p;
5852
5853 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5854 h = elf_follow_link (h);
5855 eh = (struct ppc_link_hash_entry *) h;
5856
5857 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5858 if (p->sec == sec)
5859 {
5860 /* Everything must go for SEC. */
5861 *pp = p->next;
5862 break;
5863 }
5864 }
5865
5866 if (is_branch_reloc (r_type))
5867 {
5868 struct plt_entry **ifunc = NULL;
5869 if (h != NULL)
5870 {
5871 if (h->type == STT_GNU_IFUNC)
5872 ifunc = &h->plt.plist;
5873 }
5874 else if (local_got_ents != NULL)
5875 {
5876 struct plt_entry **local_plt = (struct plt_entry **)
5877 (local_got_ents + symtab_hdr->sh_info);
5878 unsigned char *local_got_tls_masks = (unsigned char *)
5879 (local_plt + symtab_hdr->sh_info);
5880 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5881 ifunc = local_plt + r_symndx;
5882 }
5883 if (ifunc != NULL)
5884 {
5885 struct plt_entry *ent;
5886
5887 for (ent = *ifunc; ent != NULL; ent = ent->next)
5888 if (ent->addend == rel->r_addend)
5889 break;
5890 if (ent == NULL)
5891 abort ();
5892 if (ent->plt.refcount > 0)
5893 ent->plt.refcount -= 1;
5894 continue;
5895 }
5896 }
5897
5898 switch (r_type)
5899 {
5900 case R_PPC64_GOT_TLSLD16:
5901 case R_PPC64_GOT_TLSLD16_LO:
5902 case R_PPC64_GOT_TLSLD16_HI:
5903 case R_PPC64_GOT_TLSLD16_HA:
5904 tls_type = TLS_TLS | TLS_LD;
5905 goto dogot;
5906
5907 case R_PPC64_GOT_TLSGD16:
5908 case R_PPC64_GOT_TLSGD16_LO:
5909 case R_PPC64_GOT_TLSGD16_HI:
5910 case R_PPC64_GOT_TLSGD16_HA:
5911 tls_type = TLS_TLS | TLS_GD;
5912 goto dogot;
5913
5914 case R_PPC64_GOT_TPREL16_DS:
5915 case R_PPC64_GOT_TPREL16_LO_DS:
5916 case R_PPC64_GOT_TPREL16_HI:
5917 case R_PPC64_GOT_TPREL16_HA:
5918 tls_type = TLS_TLS | TLS_TPREL;
5919 goto dogot;
5920
5921 case R_PPC64_GOT_DTPREL16_DS:
5922 case R_PPC64_GOT_DTPREL16_LO_DS:
5923 case R_PPC64_GOT_DTPREL16_HI:
5924 case R_PPC64_GOT_DTPREL16_HA:
5925 tls_type = TLS_TLS | TLS_DTPREL;
5926 goto dogot;
5927
5928 case R_PPC64_GOT16:
5929 case R_PPC64_GOT16_DS:
5930 case R_PPC64_GOT16_HA:
5931 case R_PPC64_GOT16_HI:
5932 case R_PPC64_GOT16_LO:
5933 case R_PPC64_GOT16_LO_DS:
5934 dogot:
5935 {
5936 struct got_entry *ent;
5937
5938 if (h != NULL)
5939 ent = h->got.glist;
5940 else
5941 ent = local_got_ents[r_symndx];
5942
5943 for (; ent != NULL; ent = ent->next)
5944 if (ent->addend == rel->r_addend
5945 && ent->owner == abfd
5946 && ent->tls_type == tls_type)
5947 break;
5948 if (ent == NULL)
5949 abort ();
5950 if (ent->got.refcount > 0)
5951 ent->got.refcount -= 1;
5952 }
5953 break;
5954
5955 case R_PPC64_PLT16_HA:
5956 case R_PPC64_PLT16_HI:
5957 case R_PPC64_PLT16_LO:
5958 case R_PPC64_PLT32:
5959 case R_PPC64_PLT64:
5960 case R_PPC64_REL14:
5961 case R_PPC64_REL14_BRNTAKEN:
5962 case R_PPC64_REL14_BRTAKEN:
5963 case R_PPC64_REL24:
5964 if (h != NULL)
5965 {
5966 struct plt_entry *ent;
5967
5968 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5969 if (ent->addend == rel->r_addend)
5970 break;
5971 if (ent != NULL && ent->plt.refcount > 0)
5972 ent->plt.refcount -= 1;
5973 }
5974 break;
5975
5976 default:
5977 break;
5978 }
5979 }
5980 return TRUE;
5981 }
5982
5983 /* The maximum size of .sfpr. */
5984 #define SFPR_MAX (218*4)
5985
5986 struct sfpr_def_parms
5987 {
5988 const char name[12];
5989 unsigned char lo, hi;
5990 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5991 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5992 };
5993
5994 /* Auto-generate _save*, _rest* functions in .sfpr. */
5995
5996 static bfd_boolean
5997 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5998 {
5999 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6000 unsigned int i;
6001 size_t len = strlen (parm->name);
6002 bfd_boolean writing = FALSE;
6003 char sym[16];
6004
6005 if (htab == NULL)
6006 return FALSE;
6007
6008 memcpy (sym, parm->name, len);
6009 sym[len + 2] = 0;
6010
6011 for (i = parm->lo; i <= parm->hi; i++)
6012 {
6013 struct elf_link_hash_entry *h;
6014
6015 sym[len + 0] = i / 10 + '0';
6016 sym[len + 1] = i % 10 + '0';
6017 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6018 if (h != NULL
6019 && !h->def_regular)
6020 {
6021 h->root.type = bfd_link_hash_defined;
6022 h->root.u.def.section = htab->sfpr;
6023 h->root.u.def.value = htab->sfpr->size;
6024 h->type = STT_FUNC;
6025 h->def_regular = 1;
6026 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6027 writing = TRUE;
6028 if (htab->sfpr->contents == NULL)
6029 {
6030 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6031 if (htab->sfpr->contents == NULL)
6032 return FALSE;
6033 }
6034 }
6035 if (writing)
6036 {
6037 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6038 if (i != parm->hi)
6039 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6040 else
6041 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6042 htab->sfpr->size = p - htab->sfpr->contents;
6043 }
6044 }
6045
6046 return TRUE;
6047 }
6048
6049 static bfd_byte *
6050 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6051 {
6052 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6053 return p + 4;
6054 }
6055
6056 static bfd_byte *
6057 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6058 {
6059 p = savegpr0 (abfd, p, r);
6060 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6061 p = p + 4;
6062 bfd_put_32 (abfd, BLR, p);
6063 return p + 4;
6064 }
6065
6066 static bfd_byte *
6067 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6068 {
6069 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6070 return p + 4;
6071 }
6072
6073 static bfd_byte *
6074 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6075 {
6076 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6077 p = p + 4;
6078 p = restgpr0 (abfd, p, r);
6079 bfd_put_32 (abfd, MTLR_R0, p);
6080 p = p + 4;
6081 if (r == 29)
6082 {
6083 p = restgpr0 (abfd, p, 30);
6084 p = restgpr0 (abfd, p, 31);
6085 }
6086 bfd_put_32 (abfd, BLR, p);
6087 return p + 4;
6088 }
6089
6090 static bfd_byte *
6091 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6092 {
6093 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6094 return p + 4;
6095 }
6096
6097 static bfd_byte *
6098 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6099 {
6100 p = savegpr1 (abfd, p, r);
6101 bfd_put_32 (abfd, BLR, p);
6102 return p + 4;
6103 }
6104
6105 static bfd_byte *
6106 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6107 {
6108 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6109 return p + 4;
6110 }
6111
6112 static bfd_byte *
6113 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6114 {
6115 p = restgpr1 (abfd, p, r);
6116 bfd_put_32 (abfd, BLR, p);
6117 return p + 4;
6118 }
6119
6120 static bfd_byte *
6121 savefpr (bfd *abfd, bfd_byte *p, int r)
6122 {
6123 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6124 return p + 4;
6125 }
6126
6127 static bfd_byte *
6128 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6129 {
6130 p = savefpr (abfd, p, r);
6131 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6132 p = p + 4;
6133 bfd_put_32 (abfd, BLR, p);
6134 return p + 4;
6135 }
6136
6137 static bfd_byte *
6138 restfpr (bfd *abfd, bfd_byte *p, int r)
6139 {
6140 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6141 return p + 4;
6142 }
6143
6144 static bfd_byte *
6145 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6146 {
6147 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6148 p = p + 4;
6149 p = restfpr (abfd, p, r);
6150 bfd_put_32 (abfd, MTLR_R0, p);
6151 p = p + 4;
6152 if (r == 29)
6153 {
6154 p = restfpr (abfd, p, 30);
6155 p = restfpr (abfd, p, 31);
6156 }
6157 bfd_put_32 (abfd, BLR, p);
6158 return p + 4;
6159 }
6160
6161 static bfd_byte *
6162 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6163 {
6164 p = savefpr (abfd, p, r);
6165 bfd_put_32 (abfd, BLR, p);
6166 return p + 4;
6167 }
6168
6169 static bfd_byte *
6170 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6171 {
6172 p = restfpr (abfd, p, r);
6173 bfd_put_32 (abfd, BLR, p);
6174 return p + 4;
6175 }
6176
6177 static bfd_byte *
6178 savevr (bfd *abfd, bfd_byte *p, int r)
6179 {
6180 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6181 p = p + 4;
6182 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6183 return p + 4;
6184 }
6185
6186 static bfd_byte *
6187 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6188 {
6189 p = savevr (abfd, p, r);
6190 bfd_put_32 (abfd, BLR, p);
6191 return p + 4;
6192 }
6193
6194 static bfd_byte *
6195 restvr (bfd *abfd, bfd_byte *p, int r)
6196 {
6197 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6198 p = p + 4;
6199 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6200 return p + 4;
6201 }
6202
6203 static bfd_byte *
6204 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6205 {
6206 p = restvr (abfd, p, r);
6207 bfd_put_32 (abfd, BLR, p);
6208 return p + 4;
6209 }
6210
6211 /* Called via elf_link_hash_traverse to transfer dynamic linking
6212 information on function code symbol entries to their corresponding
6213 function descriptor symbol entries. */
6214
6215 static bfd_boolean
6216 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6217 {
6218 struct bfd_link_info *info;
6219 struct ppc_link_hash_table *htab;
6220 struct plt_entry *ent;
6221 struct ppc_link_hash_entry *fh;
6222 struct ppc_link_hash_entry *fdh;
6223 bfd_boolean force_local;
6224
6225 fh = (struct ppc_link_hash_entry *) h;
6226 if (fh->elf.root.type == bfd_link_hash_indirect)
6227 return TRUE;
6228
6229 if (fh->elf.root.type == bfd_link_hash_warning)
6230 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6231
6232 info = inf;
6233 htab = ppc_hash_table (info);
6234 if (htab == NULL)
6235 return FALSE;
6236
6237 /* Resolve undefined references to dot-symbols as the value
6238 in the function descriptor, if we have one in a regular object.
6239 This is to satisfy cases like ".quad .foo". Calls to functions
6240 in dynamic objects are handled elsewhere. */
6241 if (fh->elf.root.type == bfd_link_hash_undefweak
6242 && fh->was_undefined
6243 && (fdh = defined_func_desc (fh)) != NULL
6244 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6245 && opd_entry_value (fdh->elf.root.u.def.section,
6246 fdh->elf.root.u.def.value,
6247 &fh->elf.root.u.def.section,
6248 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6249 {
6250 fh->elf.root.type = fdh->elf.root.type;
6251 fh->elf.forced_local = 1;
6252 fh->elf.def_regular = fdh->elf.def_regular;
6253 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6254 }
6255
6256 /* If this is a function code symbol, transfer dynamic linking
6257 information to the function descriptor symbol. */
6258 if (!fh->is_func)
6259 return TRUE;
6260
6261 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6262 if (ent->plt.refcount > 0)
6263 break;
6264 if (ent == NULL
6265 || fh->elf.root.root.string[0] != '.'
6266 || fh->elf.root.root.string[1] == '\0')
6267 return TRUE;
6268
6269 /* Find the corresponding function descriptor symbol. Create it
6270 as undefined if necessary. */
6271
6272 fdh = lookup_fdh (fh, htab);
6273 if (fdh == NULL
6274 && !info->executable
6275 && (fh->elf.root.type == bfd_link_hash_undefined
6276 || fh->elf.root.type == bfd_link_hash_undefweak))
6277 {
6278 fdh = make_fdh (info, fh);
6279 if (fdh == NULL)
6280 return FALSE;
6281 }
6282
6283 /* Fake function descriptors are made undefweak. If the function
6284 code symbol is strong undefined, make the fake sym the same.
6285 If the function code symbol is defined, then force the fake
6286 descriptor local; We can't support overriding of symbols in a
6287 shared library on a fake descriptor. */
6288
6289 if (fdh != NULL
6290 && fdh->fake
6291 && fdh->elf.root.type == bfd_link_hash_undefweak)
6292 {
6293 if (fh->elf.root.type == bfd_link_hash_undefined)
6294 {
6295 fdh->elf.root.type = bfd_link_hash_undefined;
6296 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6297 }
6298 else if (fh->elf.root.type == bfd_link_hash_defined
6299 || fh->elf.root.type == bfd_link_hash_defweak)
6300 {
6301 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6302 }
6303 }
6304
6305 if (fdh != NULL
6306 && !fdh->elf.forced_local
6307 && (!info->executable
6308 || fdh->elf.def_dynamic
6309 || fdh->elf.ref_dynamic
6310 || (fdh->elf.root.type == bfd_link_hash_undefweak
6311 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6312 {
6313 if (fdh->elf.dynindx == -1)
6314 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6315 return FALSE;
6316 fdh->elf.ref_regular |= fh->elf.ref_regular;
6317 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6318 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6319 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6320 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6321 {
6322 move_plt_plist (fh, fdh);
6323 fdh->elf.needs_plt = 1;
6324 }
6325 fdh->is_func_descriptor = 1;
6326 fdh->oh = fh;
6327 fh->oh = fdh;
6328 }
6329
6330 /* Now that the info is on the function descriptor, clear the
6331 function code sym info. Any function code syms for which we
6332 don't have a definition in a regular file, we force local.
6333 This prevents a shared library from exporting syms that have
6334 been imported from another library. Function code syms that
6335 are really in the library we must leave global to prevent the
6336 linker dragging in a definition from a static library. */
6337 force_local = (!fh->elf.def_regular
6338 || fdh == NULL
6339 || !fdh->elf.def_regular
6340 || fdh->elf.forced_local);
6341 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6342
6343 return TRUE;
6344 }
6345
6346 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6347 this hook to a) provide some gcc support functions, and b) transfer
6348 dynamic linking information gathered so far on function code symbol
6349 entries, to their corresponding function descriptor symbol entries. */
6350
6351 static bfd_boolean
6352 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6353 struct bfd_link_info *info)
6354 {
6355 struct ppc_link_hash_table *htab;
6356 unsigned int i;
6357 const struct sfpr_def_parms funcs[] =
6358 {
6359 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6360 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6361 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6362 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6363 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6364 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6365 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6366 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6367 { "._savef", 14, 31, savefpr, savefpr1_tail },
6368 { "._restf", 14, 31, restfpr, restfpr1_tail },
6369 { "_savevr_", 20, 31, savevr, savevr_tail },
6370 { "_restvr_", 20, 31, restvr, restvr_tail }
6371 };
6372
6373 htab = ppc_hash_table (info);
6374 if (htab == NULL)
6375 return FALSE;
6376
6377 if (htab->sfpr == NULL)
6378 /* We don't have any relocs. */
6379 return TRUE;
6380
6381 /* Provide any missing _save* and _rest* functions. */
6382 htab->sfpr->size = 0;
6383 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6384 if (!sfpr_define (info, &funcs[i]))
6385 return FALSE;
6386
6387 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6388
6389 if (htab->sfpr->size == 0)
6390 htab->sfpr->flags |= SEC_EXCLUDE;
6391
6392 return TRUE;
6393 }
6394
6395 /* Adjust a symbol defined by a dynamic object and referenced by a
6396 regular object. The current definition is in some section of the
6397 dynamic object, but we're not including those sections. We have to
6398 change the definition to something the rest of the link can
6399 understand. */
6400
6401 static bfd_boolean
6402 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6403 struct elf_link_hash_entry *h)
6404 {
6405 struct ppc_link_hash_table *htab;
6406 asection *s;
6407
6408 htab = ppc_hash_table (info);
6409 if (htab == NULL)
6410 return FALSE;
6411
6412 /* Deal with function syms. */
6413 if (h->type == STT_FUNC
6414 || h->type == STT_GNU_IFUNC
6415 || h->needs_plt)
6416 {
6417 /* Clear procedure linkage table information for any symbol that
6418 won't need a .plt entry. */
6419 struct plt_entry *ent;
6420 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6421 if (ent->plt.refcount > 0)
6422 break;
6423 if (ent == NULL
6424 || (h->type != STT_GNU_IFUNC
6425 && (SYMBOL_CALLS_LOCAL (info, h)
6426 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6427 && h->root.type == bfd_link_hash_undefweak))))
6428 {
6429 h->plt.plist = NULL;
6430 h->needs_plt = 0;
6431 }
6432 }
6433 else
6434 h->plt.plist = NULL;
6435
6436 /* If this is a weak symbol, and there is a real definition, the
6437 processor independent code will have arranged for us to see the
6438 real definition first, and we can just use the same value. */
6439 if (h->u.weakdef != NULL)
6440 {
6441 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6442 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6443 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6444 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6445 if (ELIMINATE_COPY_RELOCS)
6446 h->non_got_ref = h->u.weakdef->non_got_ref;
6447 return TRUE;
6448 }
6449
6450 /* If we are creating a shared library, we must presume that the
6451 only references to the symbol are via the global offset table.
6452 For such cases we need not do anything here; the relocations will
6453 be handled correctly by relocate_section. */
6454 if (info->shared)
6455 return TRUE;
6456
6457 /* If there are no references to this symbol that do not use the
6458 GOT, we don't need to generate a copy reloc. */
6459 if (!h->non_got_ref)
6460 return TRUE;
6461
6462 /* Don't generate a copy reloc for symbols defined in the executable. */
6463 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6464 return TRUE;
6465
6466 if (ELIMINATE_COPY_RELOCS)
6467 {
6468 struct ppc_link_hash_entry * eh;
6469 struct ppc_dyn_relocs *p;
6470
6471 eh = (struct ppc_link_hash_entry *) h;
6472 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6473 {
6474 s = p->sec->output_section;
6475 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6476 break;
6477 }
6478
6479 /* If we didn't find any dynamic relocs in read-only sections, then
6480 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6481 if (p == NULL)
6482 {
6483 h->non_got_ref = 0;
6484 return TRUE;
6485 }
6486 }
6487
6488 if (h->plt.plist != NULL)
6489 {
6490 /* We should never get here, but unfortunately there are versions
6491 of gcc out there that improperly (for this ABI) put initialized
6492 function pointers, vtable refs and suchlike in read-only
6493 sections. Allow them to proceed, but warn that this might
6494 break at runtime. */
6495 (*_bfd_error_handler)
6496 (_("copy reloc against `%s' requires lazy plt linking; "
6497 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6498 h->root.root.string);
6499 }
6500
6501 /* This is a reference to a symbol defined by a dynamic object which
6502 is not a function. */
6503
6504 if (h->size == 0)
6505 {
6506 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6507 h->root.root.string);
6508 return TRUE;
6509 }
6510
6511 /* We must allocate the symbol in our .dynbss section, which will
6512 become part of the .bss section of the executable. There will be
6513 an entry for this symbol in the .dynsym section. The dynamic
6514 object will contain position independent code, so all references
6515 from the dynamic object to this symbol will go through the global
6516 offset table. The dynamic linker will use the .dynsym entry to
6517 determine the address it must put in the global offset table, so
6518 both the dynamic object and the regular object will refer to the
6519 same memory location for the variable. */
6520
6521 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6522 to copy the initial value out of the dynamic object and into the
6523 runtime process image. We need to remember the offset into the
6524 .rela.bss section we are going to use. */
6525 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6526 {
6527 htab->relbss->size += sizeof (Elf64_External_Rela);
6528 h->needs_copy = 1;
6529 }
6530
6531 s = htab->dynbss;
6532
6533 return _bfd_elf_adjust_dynamic_copy (h, s);
6534 }
6535
6536 /* If given a function descriptor symbol, hide both the function code
6537 sym and the descriptor. */
6538 static void
6539 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6540 struct elf_link_hash_entry *h,
6541 bfd_boolean force_local)
6542 {
6543 struct ppc_link_hash_entry *eh;
6544 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6545
6546 eh = (struct ppc_link_hash_entry *) h;
6547 if (eh->is_func_descriptor)
6548 {
6549 struct ppc_link_hash_entry *fh = eh->oh;
6550
6551 if (fh == NULL)
6552 {
6553 const char *p, *q;
6554 struct ppc_link_hash_table *htab;
6555 char save;
6556
6557 /* We aren't supposed to use alloca in BFD because on
6558 systems which do not have alloca the version in libiberty
6559 calls xmalloc, which might cause the program to crash
6560 when it runs out of memory. This function doesn't have a
6561 return status, so there's no way to gracefully return an
6562 error. So cheat. We know that string[-1] can be safely
6563 accessed; It's either a string in an ELF string table,
6564 or allocated in an objalloc structure. */
6565
6566 p = eh->elf.root.root.string - 1;
6567 save = *p;
6568 *(char *) p = '.';
6569 htab = ppc_hash_table (info);
6570 if (htab == NULL)
6571 return;
6572
6573 fh = (struct ppc_link_hash_entry *)
6574 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6575 *(char *) p = save;
6576
6577 /* Unfortunately, if it so happens that the string we were
6578 looking for was allocated immediately before this string,
6579 then we overwrote the string terminator. That's the only
6580 reason the lookup should fail. */
6581 if (fh == NULL)
6582 {
6583 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6584 while (q >= eh->elf.root.root.string && *q == *p)
6585 --q, --p;
6586 if (q < eh->elf.root.root.string && *p == '.')
6587 fh = (struct ppc_link_hash_entry *)
6588 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6589 }
6590 if (fh != NULL)
6591 {
6592 eh->oh = fh;
6593 fh->oh = eh;
6594 }
6595 }
6596 if (fh != NULL)
6597 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6598 }
6599 }
6600
6601 static bfd_boolean
6602 get_sym_h (struct elf_link_hash_entry **hp,
6603 Elf_Internal_Sym **symp,
6604 asection **symsecp,
6605 unsigned char **tls_maskp,
6606 Elf_Internal_Sym **locsymsp,
6607 unsigned long r_symndx,
6608 bfd *ibfd)
6609 {
6610 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6611
6612 if (r_symndx >= symtab_hdr->sh_info)
6613 {
6614 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6615 struct elf_link_hash_entry *h;
6616
6617 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6618 h = elf_follow_link (h);
6619
6620 if (hp != NULL)
6621 *hp = h;
6622
6623 if (symp != NULL)
6624 *symp = NULL;
6625
6626 if (symsecp != NULL)
6627 {
6628 asection *symsec = NULL;
6629 if (h->root.type == bfd_link_hash_defined
6630 || h->root.type == bfd_link_hash_defweak)
6631 symsec = h->root.u.def.section;
6632 *symsecp = symsec;
6633 }
6634
6635 if (tls_maskp != NULL)
6636 {
6637 struct ppc_link_hash_entry *eh;
6638
6639 eh = (struct ppc_link_hash_entry *) h;
6640 *tls_maskp = &eh->tls_mask;
6641 }
6642 }
6643 else
6644 {
6645 Elf_Internal_Sym *sym;
6646 Elf_Internal_Sym *locsyms = *locsymsp;
6647
6648 if (locsyms == NULL)
6649 {
6650 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6651 if (locsyms == NULL)
6652 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6653 symtab_hdr->sh_info,
6654 0, NULL, NULL, NULL);
6655 if (locsyms == NULL)
6656 return FALSE;
6657 *locsymsp = locsyms;
6658 }
6659 sym = locsyms + r_symndx;
6660
6661 if (hp != NULL)
6662 *hp = NULL;
6663
6664 if (symp != NULL)
6665 *symp = sym;
6666
6667 if (symsecp != NULL)
6668 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6669
6670 if (tls_maskp != NULL)
6671 {
6672 struct got_entry **lgot_ents;
6673 unsigned char *tls_mask;
6674
6675 tls_mask = NULL;
6676 lgot_ents = elf_local_got_ents (ibfd);
6677 if (lgot_ents != NULL)
6678 {
6679 struct plt_entry **local_plt = (struct plt_entry **)
6680 (lgot_ents + symtab_hdr->sh_info);
6681 unsigned char *lgot_masks = (unsigned char *)
6682 (local_plt + symtab_hdr->sh_info);
6683 tls_mask = &lgot_masks[r_symndx];
6684 }
6685 *tls_maskp = tls_mask;
6686 }
6687 }
6688 return TRUE;
6689 }
6690
6691 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6692 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6693 type suitable for optimization, and 1 otherwise. */
6694
6695 static int
6696 get_tls_mask (unsigned char **tls_maskp,
6697 unsigned long *toc_symndx,
6698 bfd_vma *toc_addend,
6699 Elf_Internal_Sym **locsymsp,
6700 const Elf_Internal_Rela *rel,
6701 bfd *ibfd)
6702 {
6703 unsigned long r_symndx;
6704 int next_r;
6705 struct elf_link_hash_entry *h;
6706 Elf_Internal_Sym *sym;
6707 asection *sec;
6708 bfd_vma off;
6709
6710 r_symndx = ELF64_R_SYM (rel->r_info);
6711 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6712 return 0;
6713
6714 if ((*tls_maskp != NULL && **tls_maskp != 0)
6715 || sec == NULL
6716 || ppc64_elf_section_data (sec) == NULL
6717 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6718 return 1;
6719
6720 /* Look inside a TOC section too. */
6721 if (h != NULL)
6722 {
6723 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6724 off = h->root.u.def.value;
6725 }
6726 else
6727 off = sym->st_value;
6728 off += rel->r_addend;
6729 BFD_ASSERT (off % 8 == 0);
6730 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6731 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6732 if (toc_symndx != NULL)
6733 *toc_symndx = r_symndx;
6734 if (toc_addend != NULL)
6735 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6736 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6737 return 0;
6738 if ((h == NULL || is_static_defined (h))
6739 && (next_r == -1 || next_r == -2))
6740 return 1 - next_r;
6741 return 1;
6742 }
6743
6744 /* Adjust all global syms defined in opd sections. In gcc generated
6745 code for the old ABI, these will already have been done. */
6746
6747 static bfd_boolean
6748 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6749 {
6750 struct ppc_link_hash_entry *eh;
6751 asection *sym_sec;
6752 struct _opd_sec_data *opd;
6753
6754 if (h->root.type == bfd_link_hash_indirect)
6755 return TRUE;
6756
6757 if (h->root.type == bfd_link_hash_warning)
6758 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6759
6760 if (h->root.type != bfd_link_hash_defined
6761 && h->root.type != bfd_link_hash_defweak)
6762 return TRUE;
6763
6764 eh = (struct ppc_link_hash_entry *) h;
6765 if (eh->adjust_done)
6766 return TRUE;
6767
6768 sym_sec = eh->elf.root.u.def.section;
6769 opd = get_opd_info (sym_sec);
6770 if (opd != NULL && opd->adjust != NULL)
6771 {
6772 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6773 if (adjust == -1)
6774 {
6775 /* This entry has been deleted. */
6776 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6777 if (dsec == NULL)
6778 {
6779 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6780 if (elf_discarded_section (dsec))
6781 {
6782 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6783 break;
6784 }
6785 }
6786 eh->elf.root.u.def.value = 0;
6787 eh->elf.root.u.def.section = dsec;
6788 }
6789 else
6790 eh->elf.root.u.def.value += adjust;
6791 eh->adjust_done = 1;
6792 }
6793 return TRUE;
6794 }
6795
6796 /* Handles decrementing dynamic reloc counts for the reloc specified by
6797 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6798 have already been determined. */
6799
6800 static bfd_boolean
6801 dec_dynrel_count (bfd_vma r_info,
6802 asection *sec,
6803 struct bfd_link_info *info,
6804 Elf_Internal_Sym **local_syms,
6805 struct elf_link_hash_entry *h,
6806 asection *sym_sec)
6807 {
6808 enum elf_ppc64_reloc_type r_type;
6809 struct ppc_dyn_relocs *p;
6810 struct ppc_dyn_relocs **pp;
6811
6812 /* Can this reloc be dynamic? This switch, and later tests here
6813 should be kept in sync with the code in check_relocs. */
6814 r_type = ELF64_R_TYPE (r_info);
6815 switch (r_type)
6816 {
6817 default:
6818 return TRUE;
6819
6820 case R_PPC64_TPREL16:
6821 case R_PPC64_TPREL16_LO:
6822 case R_PPC64_TPREL16_HI:
6823 case R_PPC64_TPREL16_HA:
6824 case R_PPC64_TPREL16_DS:
6825 case R_PPC64_TPREL16_LO_DS:
6826 case R_PPC64_TPREL16_HIGHER:
6827 case R_PPC64_TPREL16_HIGHERA:
6828 case R_PPC64_TPREL16_HIGHEST:
6829 case R_PPC64_TPREL16_HIGHESTA:
6830 if (!info->shared)
6831 return TRUE;
6832
6833 case R_PPC64_TPREL64:
6834 case R_PPC64_DTPMOD64:
6835 case R_PPC64_DTPREL64:
6836 case R_PPC64_ADDR64:
6837 case R_PPC64_REL30:
6838 case R_PPC64_REL32:
6839 case R_PPC64_REL64:
6840 case R_PPC64_ADDR14:
6841 case R_PPC64_ADDR14_BRNTAKEN:
6842 case R_PPC64_ADDR14_BRTAKEN:
6843 case R_PPC64_ADDR16:
6844 case R_PPC64_ADDR16_DS:
6845 case R_PPC64_ADDR16_HA:
6846 case R_PPC64_ADDR16_HI:
6847 case R_PPC64_ADDR16_HIGHER:
6848 case R_PPC64_ADDR16_HIGHERA:
6849 case R_PPC64_ADDR16_HIGHEST:
6850 case R_PPC64_ADDR16_HIGHESTA:
6851 case R_PPC64_ADDR16_LO:
6852 case R_PPC64_ADDR16_LO_DS:
6853 case R_PPC64_ADDR24:
6854 case R_PPC64_ADDR32:
6855 case R_PPC64_UADDR16:
6856 case R_PPC64_UADDR32:
6857 case R_PPC64_UADDR64:
6858 case R_PPC64_TOC:
6859 break;
6860 }
6861
6862 if (local_syms != NULL)
6863 {
6864 unsigned long r_symndx;
6865 Elf_Internal_Sym *sym;
6866 bfd *ibfd = sec->owner;
6867
6868 r_symndx = ELF64_R_SYM (r_info);
6869 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6870 return FALSE;
6871 }
6872
6873 if ((info->shared
6874 && (must_be_dyn_reloc (info, r_type)
6875 || (h != NULL
6876 && (!info->symbolic
6877 || h->root.type == bfd_link_hash_defweak
6878 || !h->def_regular))))
6879 || (ELIMINATE_COPY_RELOCS
6880 && !info->shared
6881 && h != NULL
6882 && (h->root.type == bfd_link_hash_defweak
6883 || !h->def_regular)))
6884 ;
6885 else
6886 return TRUE;
6887
6888 if (h != NULL)
6889 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6890 else
6891 {
6892 if (sym_sec != NULL)
6893 {
6894 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6895 pp = (struct ppc_dyn_relocs **) vpp;
6896 }
6897 else
6898 {
6899 void *vpp = &elf_section_data (sec)->local_dynrel;
6900 pp = (struct ppc_dyn_relocs **) vpp;
6901 }
6902
6903 /* elf_gc_sweep may have already removed all dyn relocs associated
6904 with local syms for a given section. Don't report a dynreloc
6905 miscount. */
6906 if (*pp == NULL)
6907 return TRUE;
6908 }
6909
6910 while ((p = *pp) != NULL)
6911 {
6912 if (p->sec == sec)
6913 {
6914 if (!must_be_dyn_reloc (info, r_type))
6915 p->pc_count -= 1;
6916 p->count -= 1;
6917 if (p->count == 0)
6918 *pp = p->next;
6919 return TRUE;
6920 }
6921 pp = &p->next;
6922 }
6923
6924 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6925 sec->owner, sec);
6926 bfd_set_error (bfd_error_bad_value);
6927 return FALSE;
6928 }
6929
6930 /* Remove unused Official Procedure Descriptor entries. Currently we
6931 only remove those associated with functions in discarded link-once
6932 sections, or weakly defined functions that have been overridden. It
6933 would be possible to remove many more entries for statically linked
6934 applications. */
6935
6936 bfd_boolean
6937 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6938 {
6939 bfd *ibfd;
6940 bfd_boolean some_edited = FALSE;
6941 asection *need_pad = NULL;
6942
6943 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6944 {
6945 asection *sec;
6946 Elf_Internal_Rela *relstart, *rel, *relend;
6947 Elf_Internal_Shdr *symtab_hdr;
6948 Elf_Internal_Sym *local_syms;
6949 bfd_vma offset;
6950 struct _opd_sec_data *opd;
6951 bfd_boolean need_edit, add_aux_fields;
6952 bfd_size_type cnt_16b = 0;
6953
6954 if (!is_ppc64_elf (ibfd))
6955 continue;
6956
6957 sec = bfd_get_section_by_name (ibfd, ".opd");
6958 if (sec == NULL || sec->size == 0)
6959 continue;
6960
6961 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6962 continue;
6963
6964 if (sec->output_section == bfd_abs_section_ptr)
6965 continue;
6966
6967 /* Look through the section relocs. */
6968 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6969 continue;
6970
6971 local_syms = NULL;
6972 symtab_hdr = &elf_symtab_hdr (ibfd);
6973
6974 /* Read the relocations. */
6975 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6976 info->keep_memory);
6977 if (relstart == NULL)
6978 return FALSE;
6979
6980 /* First run through the relocs to check they are sane, and to
6981 determine whether we need to edit this opd section. */
6982 need_edit = FALSE;
6983 need_pad = sec;
6984 offset = 0;
6985 relend = relstart + sec->reloc_count;
6986 for (rel = relstart; rel < relend; )
6987 {
6988 enum elf_ppc64_reloc_type r_type;
6989 unsigned long r_symndx;
6990 asection *sym_sec;
6991 struct elf_link_hash_entry *h;
6992 Elf_Internal_Sym *sym;
6993
6994 /* .opd contains a regular array of 16 or 24 byte entries. We're
6995 only interested in the reloc pointing to a function entry
6996 point. */
6997 if (rel->r_offset != offset
6998 || rel + 1 >= relend
6999 || (rel + 1)->r_offset != offset + 8)
7000 {
7001 /* If someone messes with .opd alignment then after a
7002 "ld -r" we might have padding in the middle of .opd.
7003 Also, there's nothing to prevent someone putting
7004 something silly in .opd with the assembler. No .opd
7005 optimization for them! */
7006 broken_opd:
7007 (*_bfd_error_handler)
7008 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7009 need_edit = FALSE;
7010 break;
7011 }
7012
7013 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7014 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7015 {
7016 (*_bfd_error_handler)
7017 (_("%B: unexpected reloc type %u in .opd section"),
7018 ibfd, r_type);
7019 need_edit = FALSE;
7020 break;
7021 }
7022
7023 r_symndx = ELF64_R_SYM (rel->r_info);
7024 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7025 r_symndx, ibfd))
7026 goto error_ret;
7027
7028 if (sym_sec == NULL || sym_sec->owner == NULL)
7029 {
7030 const char *sym_name;
7031 if (h != NULL)
7032 sym_name = h->root.root.string;
7033 else
7034 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7035 sym_sec);
7036
7037 (*_bfd_error_handler)
7038 (_("%B: undefined sym `%s' in .opd section"),
7039 ibfd, sym_name);
7040 need_edit = FALSE;
7041 break;
7042 }
7043
7044 /* opd entries are always for functions defined in the
7045 current input bfd. If the symbol isn't defined in the
7046 input bfd, then we won't be using the function in this
7047 bfd; It must be defined in a linkonce section in another
7048 bfd, or is weak. It's also possible that we are
7049 discarding the function due to a linker script /DISCARD/,
7050 which we test for via the output_section. */
7051 if (sym_sec->owner != ibfd
7052 || sym_sec->output_section == bfd_abs_section_ptr)
7053 need_edit = TRUE;
7054
7055 rel += 2;
7056 if (rel == relend
7057 || (rel + 1 == relend && rel->r_offset == offset + 16))
7058 {
7059 if (sec->size == offset + 24)
7060 {
7061 need_pad = NULL;
7062 break;
7063 }
7064 if (rel == relend && sec->size == offset + 16)
7065 {
7066 cnt_16b++;
7067 break;
7068 }
7069 goto broken_opd;
7070 }
7071
7072 if (rel->r_offset == offset + 24)
7073 offset += 24;
7074 else if (rel->r_offset != offset + 16)
7075 goto broken_opd;
7076 else if (rel + 1 < relend
7077 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7078 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7079 {
7080 offset += 16;
7081 cnt_16b++;
7082 }
7083 else if (rel + 2 < relend
7084 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7085 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7086 {
7087 offset += 24;
7088 rel += 1;
7089 }
7090 else
7091 goto broken_opd;
7092 }
7093
7094 add_aux_fields = non_overlapping && cnt_16b > 0;
7095
7096 if (need_edit || add_aux_fields)
7097 {
7098 Elf_Internal_Rela *write_rel;
7099 Elf_Internal_Shdr *rel_hdr;
7100 bfd_byte *rptr, *wptr;
7101 bfd_byte *new_contents;
7102 bfd_boolean skip;
7103 long opd_ent_size;
7104 bfd_size_type amt;
7105
7106 new_contents = NULL;
7107 amt = sec->size * sizeof (long) / 8;
7108 opd = &ppc64_elf_section_data (sec)->u.opd;
7109 opd->adjust = bfd_zalloc (sec->owner, amt);
7110 if (opd->adjust == NULL)
7111 return FALSE;
7112 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7113
7114 /* This seems a waste of time as input .opd sections are all
7115 zeros as generated by gcc, but I suppose there's no reason
7116 this will always be so. We might start putting something in
7117 the third word of .opd entries. */
7118 if ((sec->flags & SEC_IN_MEMORY) == 0)
7119 {
7120 bfd_byte *loc;
7121 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7122 {
7123 if (loc != NULL)
7124 free (loc);
7125 error_ret:
7126 if (local_syms != NULL
7127 && symtab_hdr->contents != (unsigned char *) local_syms)
7128 free (local_syms);
7129 if (elf_section_data (sec)->relocs != relstart)
7130 free (relstart);
7131 return FALSE;
7132 }
7133 sec->contents = loc;
7134 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7135 }
7136
7137 elf_section_data (sec)->relocs = relstart;
7138
7139 new_contents = sec->contents;
7140 if (add_aux_fields)
7141 {
7142 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7143 if (new_contents == NULL)
7144 return FALSE;
7145 need_pad = FALSE;
7146 }
7147 wptr = new_contents;
7148 rptr = sec->contents;
7149
7150 write_rel = relstart;
7151 skip = FALSE;
7152 offset = 0;
7153 opd_ent_size = 0;
7154 for (rel = relstart; rel < relend; rel++)
7155 {
7156 unsigned long r_symndx;
7157 asection *sym_sec;
7158 struct elf_link_hash_entry *h;
7159 Elf_Internal_Sym *sym;
7160
7161 r_symndx = ELF64_R_SYM (rel->r_info);
7162 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7163 r_symndx, ibfd))
7164 goto error_ret;
7165
7166 if (rel->r_offset == offset)
7167 {
7168 struct ppc_link_hash_entry *fdh = NULL;
7169
7170 /* See if the .opd entry is full 24 byte or
7171 16 byte (with fd_aux entry overlapped with next
7172 fd_func). */
7173 opd_ent_size = 24;
7174 if ((rel + 2 == relend && sec->size == offset + 16)
7175 || (rel + 3 < relend
7176 && rel[2].r_offset == offset + 16
7177 && rel[3].r_offset == offset + 24
7178 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7179 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7180 opd_ent_size = 16;
7181
7182 if (h != NULL
7183 && h->root.root.string[0] == '.')
7184 {
7185 struct ppc_link_hash_table *htab;
7186
7187 htab = ppc_hash_table (info);
7188 if (htab != NULL)
7189 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7190 htab);
7191 if (fdh != NULL
7192 && fdh->elf.root.type != bfd_link_hash_defined
7193 && fdh->elf.root.type != bfd_link_hash_defweak)
7194 fdh = NULL;
7195 }
7196
7197 skip = (sym_sec->owner != ibfd
7198 || sym_sec->output_section == bfd_abs_section_ptr);
7199 if (skip)
7200 {
7201 if (fdh != NULL && sym_sec->owner == ibfd)
7202 {
7203 /* Arrange for the function descriptor sym
7204 to be dropped. */
7205 fdh->elf.root.u.def.value = 0;
7206 fdh->elf.root.u.def.section = sym_sec;
7207 }
7208 opd->adjust[rel->r_offset / 8] = -1;
7209 }
7210 else
7211 {
7212 /* We'll be keeping this opd entry. */
7213
7214 if (fdh != NULL)
7215 {
7216 /* Redefine the function descriptor symbol to
7217 this location in the opd section. It is
7218 necessary to update the value here rather
7219 than using an array of adjustments as we do
7220 for local symbols, because various places
7221 in the generic ELF code use the value
7222 stored in u.def.value. */
7223 fdh->elf.root.u.def.value = wptr - new_contents;
7224 fdh->adjust_done = 1;
7225 }
7226
7227 /* Local syms are a bit tricky. We could
7228 tweak them as they can be cached, but
7229 we'd need to look through the local syms
7230 for the function descriptor sym which we
7231 don't have at the moment. So keep an
7232 array of adjustments. */
7233 opd->adjust[rel->r_offset / 8]
7234 = (wptr - new_contents) - (rptr - sec->contents);
7235
7236 if (wptr != rptr)
7237 memcpy (wptr, rptr, opd_ent_size);
7238 wptr += opd_ent_size;
7239 if (add_aux_fields && opd_ent_size == 16)
7240 {
7241 memset (wptr, '\0', 8);
7242 wptr += 8;
7243 }
7244 }
7245 rptr += opd_ent_size;
7246 offset += opd_ent_size;
7247 }
7248
7249 if (skip)
7250 {
7251 if (!NO_OPD_RELOCS
7252 && !info->relocatable
7253 && !dec_dynrel_count (rel->r_info, sec, info,
7254 NULL, h, sym_sec))
7255 goto error_ret;
7256 }
7257 else
7258 {
7259 /* We need to adjust any reloc offsets to point to the
7260 new opd entries. While we're at it, we may as well
7261 remove redundant relocs. */
7262 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7263 if (write_rel != rel)
7264 memcpy (write_rel, rel, sizeof (*rel));
7265 ++write_rel;
7266 }
7267 }
7268
7269 sec->size = wptr - new_contents;
7270 sec->reloc_count = write_rel - relstart;
7271 if (add_aux_fields)
7272 {
7273 free (sec->contents);
7274 sec->contents = new_contents;
7275 }
7276
7277 /* Fudge the header size too, as this is used later in
7278 elf_bfd_final_link if we are emitting relocs. */
7279 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7280 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7281 some_edited = TRUE;
7282 }
7283 else if (elf_section_data (sec)->relocs != relstart)
7284 free (relstart);
7285
7286 if (local_syms != NULL
7287 && symtab_hdr->contents != (unsigned char *) local_syms)
7288 {
7289 if (!info->keep_memory)
7290 free (local_syms);
7291 else
7292 symtab_hdr->contents = (unsigned char *) local_syms;
7293 }
7294 }
7295
7296 if (some_edited)
7297 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7298
7299 /* If we are doing a final link and the last .opd entry is just 16 byte
7300 long, add a 8 byte padding after it. */
7301 if (need_pad != NULL && !info->relocatable)
7302 {
7303 bfd_byte *p;
7304
7305 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7306 {
7307 BFD_ASSERT (need_pad->size > 0);
7308
7309 p = bfd_malloc (need_pad->size + 8);
7310 if (p == NULL)
7311 return FALSE;
7312
7313 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7314 p, 0, need_pad->size))
7315 return FALSE;
7316
7317 need_pad->contents = p;
7318 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7319 }
7320 else
7321 {
7322 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7323 if (p == NULL)
7324 return FALSE;
7325
7326 need_pad->contents = p;
7327 }
7328
7329 memset (need_pad->contents + need_pad->size, 0, 8);
7330 need_pad->size += 8;
7331 }
7332
7333 return TRUE;
7334 }
7335
7336 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7337
7338 asection *
7339 ppc64_elf_tls_setup (struct bfd_link_info *info,
7340 int no_tls_get_addr_opt,
7341 int *no_multi_toc)
7342 {
7343 struct ppc_link_hash_table *htab;
7344
7345 htab = ppc_hash_table (info);
7346 if (htab == NULL)
7347 return NULL;
7348
7349 if (*no_multi_toc)
7350 htab->do_multi_toc = 0;
7351 else if (!htab->do_multi_toc)
7352 *no_multi_toc = 1;
7353
7354 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7355 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7356 FALSE, FALSE, TRUE));
7357 /* Move dynamic linking info to the function descriptor sym. */
7358 if (htab->tls_get_addr != NULL)
7359 func_desc_adjust (&htab->tls_get_addr->elf, info);
7360 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7361 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7362 FALSE, FALSE, TRUE));
7363 if (!no_tls_get_addr_opt)
7364 {
7365 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7366
7367 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7368 FALSE, FALSE, TRUE);
7369 if (opt != NULL)
7370 func_desc_adjust (opt, info);
7371 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7372 FALSE, FALSE, TRUE);
7373 if (opt_fd != NULL
7374 && (opt_fd->root.type == bfd_link_hash_defined
7375 || opt_fd->root.type == bfd_link_hash_defweak))
7376 {
7377 /* If glibc supports an optimized __tls_get_addr call stub,
7378 signalled by the presence of __tls_get_addr_opt, and we'll
7379 be calling __tls_get_addr via a plt call stub, then
7380 make __tls_get_addr point to __tls_get_addr_opt. */
7381 tga_fd = &htab->tls_get_addr_fd->elf;
7382 if (htab->elf.dynamic_sections_created
7383 && tga_fd != NULL
7384 && (tga_fd->type == STT_FUNC
7385 || tga_fd->needs_plt)
7386 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7387 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7388 && tga_fd->root.type == bfd_link_hash_undefweak)))
7389 {
7390 struct plt_entry *ent;
7391
7392 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7393 if (ent->plt.refcount > 0)
7394 break;
7395 if (ent != NULL)
7396 {
7397 tga_fd->root.type = bfd_link_hash_indirect;
7398 tga_fd->root.u.i.link = &opt_fd->root;
7399 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7400 if (opt_fd->dynindx != -1)
7401 {
7402 /* Use __tls_get_addr_opt in dynamic relocations. */
7403 opt_fd->dynindx = -1;
7404 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7405 opt_fd->dynstr_index);
7406 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7407 return NULL;
7408 }
7409 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7410 tga = &htab->tls_get_addr->elf;
7411 if (opt != NULL && tga != NULL)
7412 {
7413 tga->root.type = bfd_link_hash_indirect;
7414 tga->root.u.i.link = &opt->root;
7415 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7416 _bfd_elf_link_hash_hide_symbol (info, opt,
7417 tga->forced_local);
7418 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7419 }
7420 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7421 htab->tls_get_addr_fd->is_func_descriptor = 1;
7422 if (htab->tls_get_addr != NULL)
7423 {
7424 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7425 htab->tls_get_addr->is_func = 1;
7426 }
7427 }
7428 }
7429 }
7430 else
7431 no_tls_get_addr_opt = TRUE;
7432 }
7433 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7434 return _bfd_elf_tls_setup (info->output_bfd, info);
7435 }
7436
7437 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7438 HASH1 or HASH2. */
7439
7440 static bfd_boolean
7441 branch_reloc_hash_match (const bfd *ibfd,
7442 const Elf_Internal_Rela *rel,
7443 const struct ppc_link_hash_entry *hash1,
7444 const struct ppc_link_hash_entry *hash2)
7445 {
7446 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7447 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7448 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7449
7450 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7451 {
7452 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7453 struct elf_link_hash_entry *h;
7454
7455 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7456 h = elf_follow_link (h);
7457 if (h == &hash1->elf || h == &hash2->elf)
7458 return TRUE;
7459 }
7460 return FALSE;
7461 }
7462
7463 /* Run through all the TLS relocs looking for optimization
7464 opportunities. The linker has been hacked (see ppc64elf.em) to do
7465 a preliminary section layout so that we know the TLS segment
7466 offsets. We can't optimize earlier because some optimizations need
7467 to know the tp offset, and we need to optimize before allocating
7468 dynamic relocations. */
7469
7470 bfd_boolean
7471 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7472 {
7473 bfd *ibfd;
7474 asection *sec;
7475 struct ppc_link_hash_table *htab;
7476 unsigned char *toc_ref;
7477 int pass;
7478
7479 if (info->relocatable || !info->executable)
7480 return TRUE;
7481
7482 htab = ppc_hash_table (info);
7483 if (htab == NULL)
7484 return FALSE;
7485
7486 /* Make two passes over the relocs. On the first pass, mark toc
7487 entries involved with tls relocs, and check that tls relocs
7488 involved in setting up a tls_get_addr call are indeed followed by
7489 such a call. If they are not, we can't do any tls optimization.
7490 On the second pass twiddle tls_mask flags to notify
7491 relocate_section that optimization can be done, and adjust got
7492 and plt refcounts. */
7493 toc_ref = NULL;
7494 for (pass = 0; pass < 2; ++pass)
7495 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7496 {
7497 Elf_Internal_Sym *locsyms = NULL;
7498 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7499
7500 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7501 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7502 {
7503 Elf_Internal_Rela *relstart, *rel, *relend;
7504 bfd_boolean found_tls_get_addr_arg = 0;
7505
7506 /* Read the relocations. */
7507 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7508 info->keep_memory);
7509 if (relstart == NULL)
7510 return FALSE;
7511
7512 relend = relstart + sec->reloc_count;
7513 for (rel = relstart; rel < relend; rel++)
7514 {
7515 enum elf_ppc64_reloc_type r_type;
7516 unsigned long r_symndx;
7517 struct elf_link_hash_entry *h;
7518 Elf_Internal_Sym *sym;
7519 asection *sym_sec;
7520 unsigned char *tls_mask;
7521 unsigned char tls_set, tls_clear, tls_type = 0;
7522 bfd_vma value;
7523 bfd_boolean ok_tprel, is_local;
7524 long toc_ref_index = 0;
7525 int expecting_tls_get_addr = 0;
7526 bfd_boolean ret = FALSE;
7527
7528 r_symndx = ELF64_R_SYM (rel->r_info);
7529 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7530 r_symndx, ibfd))
7531 {
7532 err_free_rel:
7533 if (elf_section_data (sec)->relocs != relstart)
7534 free (relstart);
7535 if (toc_ref != NULL)
7536 free (toc_ref);
7537 if (locsyms != NULL
7538 && (elf_symtab_hdr (ibfd).contents
7539 != (unsigned char *) locsyms))
7540 free (locsyms);
7541 return ret;
7542 }
7543
7544 if (h != NULL)
7545 {
7546 if (h->root.type == bfd_link_hash_defined
7547 || h->root.type == bfd_link_hash_defweak)
7548 value = h->root.u.def.value;
7549 else if (h->root.type == bfd_link_hash_undefweak)
7550 value = 0;
7551 else
7552 {
7553 found_tls_get_addr_arg = 0;
7554 continue;
7555 }
7556 }
7557 else
7558 /* Symbols referenced by TLS relocs must be of type
7559 STT_TLS. So no need for .opd local sym adjust. */
7560 value = sym->st_value;
7561
7562 ok_tprel = FALSE;
7563 is_local = FALSE;
7564 if (h == NULL
7565 || !h->def_dynamic)
7566 {
7567 is_local = TRUE;
7568 if (h != NULL
7569 && h->root.type == bfd_link_hash_undefweak)
7570 ok_tprel = TRUE;
7571 else
7572 {
7573 value += sym_sec->output_offset;
7574 value += sym_sec->output_section->vma;
7575 value -= htab->elf.tls_sec->vma;
7576 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7577 < (bfd_vma) 1 << 32);
7578 }
7579 }
7580
7581 r_type = ELF64_R_TYPE (rel->r_info);
7582 /* If this section has old-style __tls_get_addr calls
7583 without marker relocs, then check that each
7584 __tls_get_addr call reloc is preceded by a reloc
7585 that conceivably belongs to the __tls_get_addr arg
7586 setup insn. If we don't find matching arg setup
7587 relocs, don't do any tls optimization. */
7588 if (pass == 0
7589 && sec->has_tls_get_addr_call
7590 && h != NULL
7591 && (h == &htab->tls_get_addr->elf
7592 || h == &htab->tls_get_addr_fd->elf)
7593 && !found_tls_get_addr_arg
7594 && is_branch_reloc (r_type))
7595 {
7596 info->callbacks->minfo (_("%C __tls_get_addr lost arg, "
7597 "TLS optimization disabled\n"),
7598 ibfd, sec, rel->r_offset);
7599 ret = TRUE;
7600 goto err_free_rel;
7601 }
7602
7603 found_tls_get_addr_arg = 0;
7604 switch (r_type)
7605 {
7606 case R_PPC64_GOT_TLSLD16:
7607 case R_PPC64_GOT_TLSLD16_LO:
7608 expecting_tls_get_addr = 1;
7609 found_tls_get_addr_arg = 1;
7610 /* Fall thru */
7611
7612 case R_PPC64_GOT_TLSLD16_HI:
7613 case R_PPC64_GOT_TLSLD16_HA:
7614 /* These relocs should never be against a symbol
7615 defined in a shared lib. Leave them alone if
7616 that turns out to be the case. */
7617 if (!is_local)
7618 continue;
7619
7620 /* LD -> LE */
7621 tls_set = 0;
7622 tls_clear = TLS_LD;
7623 tls_type = TLS_TLS | TLS_LD;
7624 break;
7625
7626 case R_PPC64_GOT_TLSGD16:
7627 case R_PPC64_GOT_TLSGD16_LO:
7628 expecting_tls_get_addr = 1;
7629 found_tls_get_addr_arg = 1;
7630 /* Fall thru */
7631
7632 case R_PPC64_GOT_TLSGD16_HI:
7633 case R_PPC64_GOT_TLSGD16_HA:
7634 if (ok_tprel)
7635 /* GD -> LE */
7636 tls_set = 0;
7637 else
7638 /* GD -> IE */
7639 tls_set = TLS_TLS | TLS_TPRELGD;
7640 tls_clear = TLS_GD;
7641 tls_type = TLS_TLS | TLS_GD;
7642 break;
7643
7644 case R_PPC64_GOT_TPREL16_DS:
7645 case R_PPC64_GOT_TPREL16_LO_DS:
7646 case R_PPC64_GOT_TPREL16_HI:
7647 case R_PPC64_GOT_TPREL16_HA:
7648 if (ok_tprel)
7649 {
7650 /* IE -> LE */
7651 tls_set = 0;
7652 tls_clear = TLS_TPREL;
7653 tls_type = TLS_TLS | TLS_TPREL;
7654 break;
7655 }
7656 continue;
7657
7658 case R_PPC64_TLSGD:
7659 case R_PPC64_TLSLD:
7660 found_tls_get_addr_arg = 1;
7661 /* Fall thru */
7662
7663 case R_PPC64_TLS:
7664 case R_PPC64_TOC16:
7665 case R_PPC64_TOC16_LO:
7666 if (sym_sec == NULL || sym_sec != toc)
7667 continue;
7668
7669 /* Mark this toc entry as referenced by a TLS
7670 code sequence. We can do that now in the
7671 case of R_PPC64_TLS, and after checking for
7672 tls_get_addr for the TOC16 relocs. */
7673 if (toc_ref == NULL)
7674 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7675 if (toc_ref == NULL)
7676 goto err_free_rel;
7677
7678 if (h != NULL)
7679 value = h->root.u.def.value;
7680 else
7681 value = sym->st_value;
7682 value += rel->r_addend;
7683 BFD_ASSERT (value < toc->size && value % 8 == 0);
7684 toc_ref_index = (value + toc->output_offset) / 8;
7685 if (r_type == R_PPC64_TLS
7686 || r_type == R_PPC64_TLSGD
7687 || r_type == R_PPC64_TLSLD)
7688 {
7689 toc_ref[toc_ref_index] = 1;
7690 continue;
7691 }
7692
7693 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7694 continue;
7695
7696 tls_set = 0;
7697 tls_clear = 0;
7698 expecting_tls_get_addr = 2;
7699 break;
7700
7701 case R_PPC64_TPREL64:
7702 if (pass == 0
7703 || sec != toc
7704 || toc_ref == NULL
7705 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7706 continue;
7707 if (ok_tprel)
7708 {
7709 /* IE -> LE */
7710 tls_set = TLS_EXPLICIT;
7711 tls_clear = TLS_TPREL;
7712 break;
7713 }
7714 continue;
7715
7716 case R_PPC64_DTPMOD64:
7717 if (pass == 0
7718 || sec != toc
7719 || toc_ref == NULL
7720 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7721 continue;
7722 if (rel + 1 < relend
7723 && (rel[1].r_info
7724 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7725 && rel[1].r_offset == rel->r_offset + 8)
7726 {
7727 if (ok_tprel)
7728 /* GD -> LE */
7729 tls_set = TLS_EXPLICIT | TLS_GD;
7730 else
7731 /* GD -> IE */
7732 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7733 tls_clear = TLS_GD;
7734 }
7735 else
7736 {
7737 if (!is_local)
7738 continue;
7739
7740 /* LD -> LE */
7741 tls_set = TLS_EXPLICIT;
7742 tls_clear = TLS_LD;
7743 }
7744 break;
7745
7746 default:
7747 continue;
7748 }
7749
7750 if (pass == 0)
7751 {
7752 if (!expecting_tls_get_addr
7753 || !sec->has_tls_get_addr_call)
7754 continue;
7755
7756 if (rel + 1 < relend
7757 && branch_reloc_hash_match (ibfd, rel + 1,
7758 htab->tls_get_addr,
7759 htab->tls_get_addr_fd))
7760 {
7761 if (expecting_tls_get_addr == 2)
7762 {
7763 /* Check for toc tls entries. */
7764 unsigned char *toc_tls;
7765 int retval;
7766
7767 retval = get_tls_mask (&toc_tls, NULL, NULL,
7768 &locsyms,
7769 rel, ibfd);
7770 if (retval == 0)
7771 goto err_free_rel;
7772 if (toc_tls != NULL)
7773 {
7774 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
7775 found_tls_get_addr_arg = 1;
7776 if (retval > 1)
7777 toc_ref[toc_ref_index] = 1;
7778 }
7779 }
7780 continue;
7781 }
7782
7783 if (expecting_tls_get_addr != 1)
7784 continue;
7785
7786 /* Uh oh, we didn't find the expected call. We
7787 could just mark this symbol to exclude it
7788 from tls optimization but it's safer to skip
7789 the entire optimization. */
7790 info->callbacks->minfo (_("%C arg lost __tls_get_addr, "
7791 "TLS optimization disabled\n"),
7792 ibfd, sec, rel->r_offset);
7793 ret = TRUE;
7794 goto err_free_rel;
7795 }
7796
7797 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7798 {
7799 struct plt_entry *ent;
7800 for (ent = htab->tls_get_addr->elf.plt.plist;
7801 ent != NULL;
7802 ent = ent->next)
7803 if (ent->addend == 0)
7804 {
7805 if (ent->plt.refcount > 0)
7806 {
7807 ent->plt.refcount -= 1;
7808 expecting_tls_get_addr = 0;
7809 }
7810 break;
7811 }
7812 }
7813
7814 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7815 {
7816 struct plt_entry *ent;
7817 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7818 ent != NULL;
7819 ent = ent->next)
7820 if (ent->addend == 0)
7821 {
7822 if (ent->plt.refcount > 0)
7823 ent->plt.refcount -= 1;
7824 break;
7825 }
7826 }
7827
7828 if (tls_clear == 0)
7829 continue;
7830
7831 if ((tls_set & TLS_EXPLICIT) == 0)
7832 {
7833 struct got_entry *ent;
7834
7835 /* Adjust got entry for this reloc. */
7836 if (h != NULL)
7837 ent = h->got.glist;
7838 else
7839 ent = elf_local_got_ents (ibfd)[r_symndx];
7840
7841 for (; ent != NULL; ent = ent->next)
7842 if (ent->addend == rel->r_addend
7843 && ent->owner == ibfd
7844 && ent->tls_type == tls_type)
7845 break;
7846 if (ent == NULL)
7847 abort ();
7848
7849 if (tls_set == 0)
7850 {
7851 /* We managed to get rid of a got entry. */
7852 if (ent->got.refcount > 0)
7853 ent->got.refcount -= 1;
7854 }
7855 }
7856 else
7857 {
7858 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7859 we'll lose one or two dyn relocs. */
7860 if (!dec_dynrel_count (rel->r_info, sec, info,
7861 NULL, h, sym_sec))
7862 return FALSE;
7863
7864 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7865 {
7866 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7867 NULL, h, sym_sec))
7868 return FALSE;
7869 }
7870 }
7871
7872 *tls_mask |= tls_set;
7873 *tls_mask &= ~tls_clear;
7874 }
7875
7876 if (elf_section_data (sec)->relocs != relstart)
7877 free (relstart);
7878 }
7879
7880 if (locsyms != NULL
7881 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7882 {
7883 if (!info->keep_memory)
7884 free (locsyms);
7885 else
7886 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7887 }
7888 }
7889
7890 if (toc_ref != NULL)
7891 free (toc_ref);
7892 return TRUE;
7893 }
7894
7895 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7896 the values of any global symbols in a toc section that has been
7897 edited. Globals in toc sections should be a rarity, so this function
7898 sets a flag if any are found in toc sections other than the one just
7899 edited, so that futher hash table traversals can be avoided. */
7900
7901 struct adjust_toc_info
7902 {
7903 asection *toc;
7904 unsigned long *skip;
7905 bfd_boolean global_toc_syms;
7906 };
7907
7908 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
7909
7910 static bfd_boolean
7911 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7912 {
7913 struct ppc_link_hash_entry *eh;
7914 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7915 unsigned long i;
7916
7917 if (h->root.type == bfd_link_hash_indirect)
7918 return TRUE;
7919
7920 if (h->root.type == bfd_link_hash_warning)
7921 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7922
7923 if (h->root.type != bfd_link_hash_defined
7924 && h->root.type != bfd_link_hash_defweak)
7925 return TRUE;
7926
7927 eh = (struct ppc_link_hash_entry *) h;
7928 if (eh->adjust_done)
7929 return TRUE;
7930
7931 if (eh->elf.root.u.def.section == toc_inf->toc)
7932 {
7933 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
7934 i = toc_inf->toc->rawsize >> 3;
7935 else
7936 i = eh->elf.root.u.def.value >> 3;
7937
7938 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
7939 {
7940 (*_bfd_error_handler)
7941 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
7942 do
7943 ++i;
7944 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
7945 eh->elf.root.u.def.value = (bfd_vma) i << 3;
7946 }
7947
7948 eh->elf.root.u.def.value -= toc_inf->skip[i];
7949 eh->adjust_done = 1;
7950 }
7951 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7952 toc_inf->global_toc_syms = TRUE;
7953
7954 return TRUE;
7955 }
7956
7957 /* Examine all relocs referencing .toc sections in order to remove
7958 unused .toc entries. */
7959
7960 bfd_boolean
7961 ppc64_elf_edit_toc (struct bfd_link_info *info)
7962 {
7963 bfd *ibfd;
7964 struct adjust_toc_info toc_inf;
7965 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7966
7967 htab->do_toc_opt = 1;
7968 toc_inf.global_toc_syms = TRUE;
7969 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7970 {
7971 asection *toc, *sec;
7972 Elf_Internal_Shdr *symtab_hdr;
7973 Elf_Internal_Sym *local_syms;
7974 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
7975 unsigned long *skip, *drop;
7976 unsigned char *used;
7977 unsigned char *keep, last, some_unused;
7978
7979 if (!is_ppc64_elf (ibfd))
7980 continue;
7981
7982 toc = bfd_get_section_by_name (ibfd, ".toc");
7983 if (toc == NULL
7984 || toc->size == 0
7985 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7986 || elf_discarded_section (toc))
7987 continue;
7988
7989 toc_relocs = NULL;
7990 local_syms = NULL;
7991 symtab_hdr = &elf_symtab_hdr (ibfd);
7992
7993 /* Look at sections dropped from the final link. */
7994 skip = NULL;
7995 relstart = NULL;
7996 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7997 {
7998 if (sec->reloc_count == 0
7999 || !elf_discarded_section (sec)
8000 || get_opd_info (sec)
8001 || (sec->flags & SEC_ALLOC) == 0
8002 || (sec->flags & SEC_DEBUGGING) != 0)
8003 continue;
8004
8005 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8006 if (relstart == NULL)
8007 goto error_ret;
8008
8009 /* Run through the relocs to see which toc entries might be
8010 unused. */
8011 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8012 {
8013 enum elf_ppc64_reloc_type r_type;
8014 unsigned long r_symndx;
8015 asection *sym_sec;
8016 struct elf_link_hash_entry *h;
8017 Elf_Internal_Sym *sym;
8018 bfd_vma val;
8019
8020 r_type = ELF64_R_TYPE (rel->r_info);
8021 switch (r_type)
8022 {
8023 default:
8024 continue;
8025
8026 case R_PPC64_TOC16:
8027 case R_PPC64_TOC16_LO:
8028 case R_PPC64_TOC16_HI:
8029 case R_PPC64_TOC16_HA:
8030 case R_PPC64_TOC16_DS:
8031 case R_PPC64_TOC16_LO_DS:
8032 break;
8033 }
8034
8035 r_symndx = ELF64_R_SYM (rel->r_info);
8036 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8037 r_symndx, ibfd))
8038 goto error_ret;
8039
8040 if (sym_sec != toc)
8041 continue;
8042
8043 if (h != NULL)
8044 val = h->root.u.def.value;
8045 else
8046 val = sym->st_value;
8047 val += rel->r_addend;
8048
8049 if (val >= toc->size)
8050 continue;
8051
8052 /* Anything in the toc ought to be aligned to 8 bytes.
8053 If not, don't mark as unused. */
8054 if (val & 7)
8055 continue;
8056
8057 if (skip == NULL)
8058 {
8059 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8060 if (skip == NULL)
8061 goto error_ret;
8062 }
8063
8064 skip[val >> 3] = ref_from_discarded;
8065 }
8066
8067 if (elf_section_data (sec)->relocs != relstart)
8068 free (relstart);
8069 }
8070
8071 /* For largetoc loads of address constants, we can convert
8072 . addis rx,2,addr@got@ha
8073 . ld ry,addr@got@l(rx)
8074 to
8075 . addis rx,2,addr@toc@ha
8076 . addi ry,rx,addr@toc@l
8077 when addr is within 2G of the toc pointer. This then means
8078 that the word storing "addr" in the toc is no longer needed. */
8079
8080 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8081 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8082 && toc->reloc_count != 0)
8083 {
8084 /* Read toc relocs. */
8085 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8086 info->keep_memory);
8087 if (toc_relocs == NULL)
8088 goto error_ret;
8089
8090 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8091 {
8092 enum elf_ppc64_reloc_type r_type;
8093 unsigned long r_symndx;
8094 asection *sym_sec;
8095 struct elf_link_hash_entry *h;
8096 Elf_Internal_Sym *sym;
8097 bfd_vma val, addr;
8098
8099 r_type = ELF64_R_TYPE (rel->r_info);
8100 if (r_type != R_PPC64_ADDR64)
8101 continue;
8102
8103 r_symndx = ELF64_R_SYM (rel->r_info);
8104 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8105 r_symndx, ibfd))
8106 goto error_ret;
8107
8108 if (sym_sec == NULL
8109 || elf_discarded_section (sym_sec))
8110 continue;
8111
8112 if (!SYMBOL_CALLS_LOCAL (info, h))
8113 continue;
8114
8115 if (h != NULL)
8116 {
8117 if (h->type == STT_GNU_IFUNC)
8118 continue;
8119 val = h->root.u.def.value;
8120 }
8121 else
8122 {
8123 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8124 continue;
8125 val = sym->st_value;
8126 }
8127 val += rel->r_addend;
8128 val += sym_sec->output_section->vma + sym_sec->output_offset;
8129
8130 /* We don't yet know the exact toc pointer value, but we
8131 know it will be somewhere in the toc section. Don't
8132 optimize if the difference from any possible toc
8133 pointer is outside [ff..f80008000, 7fff7fff]. */
8134 addr = toc->output_section->vma + TOC_BASE_OFF;
8135 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8136 continue;
8137
8138 addr = toc->output_section->vma + toc->output_section->rawsize;
8139 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8140 continue;
8141
8142 if (skip == NULL)
8143 {
8144 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8145 if (skip == NULL)
8146 goto error_ret;
8147 }
8148
8149 skip[rel->r_offset >> 3]
8150 |= can_optimize | ((rel - toc_relocs) << 2);
8151 }
8152 }
8153
8154 if (skip == NULL)
8155 continue;
8156
8157 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8158 if (used == NULL)
8159 {
8160 error_ret:
8161 if (local_syms != NULL
8162 && symtab_hdr->contents != (unsigned char *) local_syms)
8163 free (local_syms);
8164 if (sec != NULL
8165 && relstart != NULL
8166 && elf_section_data (sec)->relocs != relstart)
8167 free (relstart);
8168 if (toc_relocs != NULL
8169 && elf_section_data (toc)->relocs != toc_relocs)
8170 free (toc_relocs);
8171 if (skip != NULL)
8172 free (skip);
8173 return FALSE;
8174 }
8175
8176 /* Now check all kept sections that might reference the toc.
8177 Check the toc itself last. */
8178 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8179 : ibfd->sections);
8180 sec != NULL;
8181 sec = (sec == toc ? NULL
8182 : sec->next == NULL ? toc
8183 : sec->next == toc && toc->next ? toc->next
8184 : sec->next))
8185 {
8186 int repeat;
8187
8188 if (sec->reloc_count == 0
8189 || elf_discarded_section (sec)
8190 || get_opd_info (sec)
8191 || (sec->flags & SEC_ALLOC) == 0
8192 || (sec->flags & SEC_DEBUGGING) != 0)
8193 continue;
8194
8195 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8196 info->keep_memory);
8197 if (relstart == NULL)
8198 goto error_ret;
8199
8200 /* Mark toc entries referenced as used. */
8201 repeat = 0;
8202 do
8203 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8204 {
8205 enum elf_ppc64_reloc_type r_type;
8206 unsigned long r_symndx;
8207 asection *sym_sec;
8208 struct elf_link_hash_entry *h;
8209 Elf_Internal_Sym *sym;
8210 bfd_vma val;
8211
8212 r_type = ELF64_R_TYPE (rel->r_info);
8213 switch (r_type)
8214 {
8215 case R_PPC64_TOC16:
8216 case R_PPC64_TOC16_LO:
8217 case R_PPC64_TOC16_HI:
8218 case R_PPC64_TOC16_HA:
8219 case R_PPC64_TOC16_DS:
8220 case R_PPC64_TOC16_LO_DS:
8221 /* In case we're taking addresses of toc entries. */
8222 case R_PPC64_ADDR64:
8223 break;
8224
8225 default:
8226 continue;
8227 }
8228
8229 r_symndx = ELF64_R_SYM (rel->r_info);
8230 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8231 r_symndx, ibfd))
8232 {
8233 free (used);
8234 goto error_ret;
8235 }
8236
8237 if (sym_sec != toc)
8238 continue;
8239
8240 if (h != NULL)
8241 val = h->root.u.def.value;
8242 else
8243 val = sym->st_value;
8244 val += rel->r_addend;
8245
8246 if (val >= toc->size)
8247 continue;
8248
8249 if ((skip[val >> 3] & can_optimize) != 0)
8250 {
8251 bfd_vma off;
8252 unsigned char opc;
8253
8254 switch (r_type)
8255 {
8256 case R_PPC64_TOC16_HA:
8257 break;
8258
8259 case R_PPC64_TOC16_LO_DS:
8260 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8261 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8262 return FALSE;
8263 if ((opc & (0x3f << 2)) == (58u << 2))
8264 break;
8265 /* Fall thru */
8266
8267 default:
8268 /* Wrong sort of reloc, or not a ld. We may
8269 as well clear ref_from_discarded too. */
8270 skip[val >> 3] = 0;
8271 }
8272 }
8273
8274 /* For the toc section, we only mark as used if
8275 this entry itself isn't unused. */
8276 if (sec == toc
8277 && !used[val >> 3]
8278 && (used[rel->r_offset >> 3]
8279 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8280 /* Do all the relocs again, to catch reference
8281 chains. */
8282 repeat = 1;
8283
8284 used[val >> 3] = 1;
8285 }
8286 while (repeat);
8287
8288 if (elf_section_data (sec)->relocs != relstart)
8289 free (relstart);
8290 }
8291
8292 /* Merge the used and skip arrays. Assume that TOC
8293 doublewords not appearing as either used or unused belong
8294 to to an entry more than one doubleword in size. */
8295 for (drop = skip, keep = used, last = 0, some_unused = 0;
8296 drop < skip + (toc->size + 7) / 8;
8297 ++drop, ++keep)
8298 {
8299 if (*keep)
8300 {
8301 *drop &= ~ref_from_discarded;
8302 if ((*drop & can_optimize) != 0)
8303 some_unused = 1;
8304 last = 0;
8305 }
8306 else if (*drop)
8307 {
8308 some_unused = 1;
8309 last = ref_from_discarded;
8310 }
8311 else
8312 *drop = last;
8313 }
8314
8315 free (used);
8316
8317 if (some_unused)
8318 {
8319 bfd_byte *contents, *src;
8320 unsigned long off;
8321 Elf_Internal_Sym *sym;
8322 bfd_boolean local_toc_syms = FALSE;
8323
8324 /* Shuffle the toc contents, and at the same time convert the
8325 skip array from booleans into offsets. */
8326 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8327 goto error_ret;
8328
8329 elf_section_data (toc)->this_hdr.contents = contents;
8330
8331 for (src = contents, off = 0, drop = skip;
8332 src < contents + toc->size;
8333 src += 8, ++drop)
8334 {
8335 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8336 off += 8;
8337 else if (off != 0)
8338 {
8339 *drop = off;
8340 memcpy (src - off, src, 8);
8341 }
8342 }
8343 *drop = off;
8344 toc->rawsize = toc->size;
8345 toc->size = src - contents - off;
8346
8347 /* Adjust addends for relocs against the toc section sym,
8348 and optimize any accesses we can. */
8349 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8350 {
8351 if (sec->reloc_count == 0
8352 || elf_discarded_section (sec))
8353 continue;
8354
8355 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8356 info->keep_memory);
8357 if (relstart == NULL)
8358 goto error_ret;
8359
8360 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8361 {
8362 enum elf_ppc64_reloc_type r_type;
8363 unsigned long r_symndx;
8364 asection *sym_sec;
8365 struct elf_link_hash_entry *h;
8366 bfd_vma val;
8367
8368 r_type = ELF64_R_TYPE (rel->r_info);
8369 switch (r_type)
8370 {
8371 default:
8372 continue;
8373
8374 case R_PPC64_TOC16:
8375 case R_PPC64_TOC16_LO:
8376 case R_PPC64_TOC16_HI:
8377 case R_PPC64_TOC16_HA:
8378 case R_PPC64_TOC16_DS:
8379 case R_PPC64_TOC16_LO_DS:
8380 case R_PPC64_ADDR64:
8381 break;
8382 }
8383
8384 r_symndx = ELF64_R_SYM (rel->r_info);
8385 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8386 r_symndx, ibfd))
8387 goto error_ret;
8388
8389 if (sym_sec != toc)
8390 continue;
8391
8392 if (h != NULL)
8393 val = h->root.u.def.value;
8394 else
8395 {
8396 val = sym->st_value;
8397 if (val != 0)
8398 local_toc_syms = TRUE;
8399 }
8400
8401 val += rel->r_addend;
8402
8403 if (val > toc->rawsize)
8404 val = toc->rawsize;
8405 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8406 continue;
8407 else if ((skip[val >> 3] & can_optimize) != 0)
8408 {
8409 Elf_Internal_Rela *tocrel
8410 = toc_relocs + (skip[val >> 3] >> 2);
8411 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8412
8413 switch (r_type)
8414 {
8415 case R_PPC64_TOC16_HA:
8416 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8417 break;
8418
8419 case R_PPC64_TOC16_LO_DS:
8420 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8421 break;
8422
8423 default:
8424 abort ();
8425 }
8426 rel->r_addend = tocrel->r_addend;
8427 elf_section_data (sec)->relocs = relstart;
8428 continue;
8429 }
8430
8431 if (h != NULL || sym->st_value != 0)
8432 continue;
8433
8434 rel->r_addend -= skip[val >> 3];
8435 elf_section_data (sec)->relocs = relstart;
8436 }
8437
8438 if (elf_section_data (sec)->relocs != relstart)
8439 free (relstart);
8440 }
8441
8442 /* We shouldn't have local or global symbols defined in the TOC,
8443 but handle them anyway. */
8444 if (local_syms != NULL)
8445 for (sym = local_syms;
8446 sym < local_syms + symtab_hdr->sh_info;
8447 ++sym)
8448 if (sym->st_value != 0
8449 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8450 {
8451 unsigned long i;
8452
8453 if (sym->st_value > toc->rawsize)
8454 i = toc->rawsize >> 3;
8455 else
8456 i = sym->st_value >> 3;
8457
8458 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8459 {
8460 if (local_toc_syms)
8461 (*_bfd_error_handler)
8462 (_("%s defined on removed toc entry"),
8463 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8464 do
8465 ++i;
8466 while ((skip[i] & (ref_from_discarded | can_optimize)));
8467 sym->st_value = (bfd_vma) i << 3;
8468 }
8469
8470 sym->st_value -= skip[i];
8471 symtab_hdr->contents = (unsigned char *) local_syms;
8472 }
8473
8474 /* Adjust any global syms defined in this toc input section. */
8475 if (toc_inf.global_toc_syms)
8476 {
8477 toc_inf.toc = toc;
8478 toc_inf.skip = skip;
8479 toc_inf.global_toc_syms = FALSE;
8480 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8481 &toc_inf);
8482 }
8483
8484 if (toc->reloc_count != 0)
8485 {
8486 Elf_Internal_Shdr *rel_hdr;
8487 Elf_Internal_Rela *wrel;
8488 bfd_size_type sz;
8489
8490 /* Remove unused toc relocs, and adjust those we keep. */
8491 if (toc_relocs == NULL)
8492 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8493 info->keep_memory);
8494 if (toc_relocs == NULL)
8495 goto error_ret;
8496
8497 wrel = toc_relocs;
8498 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8499 if ((skip[rel->r_offset >> 3]
8500 & (ref_from_discarded | can_optimize)) == 0)
8501 {
8502 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8503 wrel->r_info = rel->r_info;
8504 wrel->r_addend = rel->r_addend;
8505 ++wrel;
8506 }
8507 else if (!dec_dynrel_count (rel->r_info, toc, info,
8508 &local_syms, NULL, NULL))
8509 goto error_ret;
8510
8511 elf_section_data (toc)->relocs = toc_relocs;
8512 toc->reloc_count = wrel - toc_relocs;
8513 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8514 sz = rel_hdr->sh_entsize;
8515 rel_hdr->sh_size = toc->reloc_count * sz;
8516 }
8517 }
8518 else if (toc_relocs != NULL
8519 && elf_section_data (toc)->relocs != toc_relocs)
8520 free (toc_relocs);
8521
8522 if (local_syms != NULL
8523 && symtab_hdr->contents != (unsigned char *) local_syms)
8524 {
8525 if (!info->keep_memory)
8526 free (local_syms);
8527 else
8528 symtab_hdr->contents = (unsigned char *) local_syms;
8529 }
8530 free (skip);
8531 }
8532
8533 return TRUE;
8534 }
8535
8536 /* Return true iff input section I references the TOC using
8537 instructions limited to +/-32k offsets. */
8538
8539 bfd_boolean
8540 ppc64_elf_has_small_toc_reloc (asection *i)
8541 {
8542 return (is_ppc64_elf (i->owner)
8543 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8544 }
8545
8546 /* Allocate space for one GOT entry. */
8547
8548 static void
8549 allocate_got (struct elf_link_hash_entry *h,
8550 struct bfd_link_info *info,
8551 struct got_entry *gent)
8552 {
8553 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8554 bfd_boolean dyn;
8555 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8556 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8557 ? 16 : 8);
8558 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8559 ? 2 : 1) * sizeof (Elf64_External_Rela);
8560 asection *got = ppc64_elf_tdata (gent->owner)->got;
8561
8562 gent->got.offset = got->size;
8563 got->size += entsize;
8564
8565 dyn = htab->elf.dynamic_sections_created;
8566 if ((info->shared
8567 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8568 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8569 || h->root.type != bfd_link_hash_undefweak))
8570 {
8571 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8572 relgot->size += rentsize;
8573 }
8574 else if (h->type == STT_GNU_IFUNC)
8575 {
8576 asection *relgot = htab->reliplt;
8577 relgot->size += rentsize;
8578 htab->got_reli_size += rentsize;
8579 }
8580 }
8581
8582 /* This function merges got entries in the same toc group. */
8583
8584 static void
8585 merge_got_entries (struct got_entry **pent)
8586 {
8587 struct got_entry *ent, *ent2;
8588
8589 for (ent = *pent; ent != NULL; ent = ent->next)
8590 if (!ent->is_indirect)
8591 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8592 if (!ent2->is_indirect
8593 && ent2->addend == ent->addend
8594 && ent2->tls_type == ent->tls_type
8595 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8596 {
8597 ent2->is_indirect = TRUE;
8598 ent2->got.ent = ent;
8599 }
8600 }
8601
8602 /* Allocate space in .plt, .got and associated reloc sections for
8603 dynamic relocs. */
8604
8605 static bfd_boolean
8606 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8607 {
8608 struct bfd_link_info *info;
8609 struct ppc_link_hash_table *htab;
8610 asection *s;
8611 struct ppc_link_hash_entry *eh;
8612 struct ppc_dyn_relocs *p;
8613 struct got_entry **pgent, *gent;
8614
8615 if (h->root.type == bfd_link_hash_indirect)
8616 return TRUE;
8617
8618 if (h->root.type == bfd_link_hash_warning)
8619 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8620
8621 info = (struct bfd_link_info *) inf;
8622 htab = ppc_hash_table (info);
8623 if (htab == NULL)
8624 return FALSE;
8625
8626 if ((htab->elf.dynamic_sections_created
8627 && h->dynindx != -1
8628 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8629 || h->type == STT_GNU_IFUNC)
8630 {
8631 struct plt_entry *pent;
8632 bfd_boolean doneone = FALSE;
8633 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8634 if (pent->plt.refcount > 0)
8635 {
8636 if (!htab->elf.dynamic_sections_created
8637 || h->dynindx == -1)
8638 {
8639 s = htab->iplt;
8640 pent->plt.offset = s->size;
8641 s->size += PLT_ENTRY_SIZE;
8642 s = htab->reliplt;
8643 }
8644 else
8645 {
8646 /* If this is the first .plt entry, make room for the special
8647 first entry. */
8648 s = htab->plt;
8649 if (s->size == 0)
8650 s->size += PLT_INITIAL_ENTRY_SIZE;
8651
8652 pent->plt.offset = s->size;
8653
8654 /* Make room for this entry. */
8655 s->size += PLT_ENTRY_SIZE;
8656
8657 /* Make room for the .glink code. */
8658 s = htab->glink;
8659 if (s->size == 0)
8660 s->size += GLINK_CALL_STUB_SIZE;
8661 /* We need bigger stubs past index 32767. */
8662 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8663 s->size += 4;
8664 s->size += 2*4;
8665
8666 /* We also need to make an entry in the .rela.plt section. */
8667 s = htab->relplt;
8668 }
8669 s->size += sizeof (Elf64_External_Rela);
8670 doneone = TRUE;
8671 }
8672 else
8673 pent->plt.offset = (bfd_vma) -1;
8674 if (!doneone)
8675 {
8676 h->plt.plist = NULL;
8677 h->needs_plt = 0;
8678 }
8679 }
8680 else
8681 {
8682 h->plt.plist = NULL;
8683 h->needs_plt = 0;
8684 }
8685
8686 eh = (struct ppc_link_hash_entry *) h;
8687 /* Run through the TLS GD got entries first if we're changing them
8688 to TPREL. */
8689 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8690 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8691 if (gent->got.refcount > 0
8692 && (gent->tls_type & TLS_GD) != 0)
8693 {
8694 /* This was a GD entry that has been converted to TPREL. If
8695 there happens to be a TPREL entry we can use that one. */
8696 struct got_entry *ent;
8697 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8698 if (ent->got.refcount > 0
8699 && (ent->tls_type & TLS_TPREL) != 0
8700 && ent->addend == gent->addend
8701 && ent->owner == gent->owner)
8702 {
8703 gent->got.refcount = 0;
8704 break;
8705 }
8706
8707 /* If not, then we'll be using our own TPREL entry. */
8708 if (gent->got.refcount != 0)
8709 gent->tls_type = TLS_TLS | TLS_TPREL;
8710 }
8711
8712 /* Remove any list entry that won't generate a word in the GOT before
8713 we call merge_got_entries. Otherwise we risk merging to empty
8714 entries. */
8715 pgent = &h->got.glist;
8716 while ((gent = *pgent) != NULL)
8717 if (gent->got.refcount > 0)
8718 {
8719 if ((gent->tls_type & TLS_LD) != 0
8720 && !h->def_dynamic)
8721 {
8722 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8723 *pgent = gent->next;
8724 }
8725 else
8726 pgent = &gent->next;
8727 }
8728 else
8729 *pgent = gent->next;
8730
8731 if (!htab->do_multi_toc)
8732 merge_got_entries (&h->got.glist);
8733
8734 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8735 if (!gent->is_indirect)
8736 {
8737 /* Make sure this symbol is output as a dynamic symbol.
8738 Undefined weak syms won't yet be marked as dynamic,
8739 nor will all TLS symbols. */
8740 if (h->dynindx == -1
8741 && !h->forced_local
8742 && h->type != STT_GNU_IFUNC
8743 && htab->elf.dynamic_sections_created)
8744 {
8745 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8746 return FALSE;
8747 }
8748
8749 if (!is_ppc64_elf (gent->owner))
8750 abort ();
8751
8752 allocate_got (h, info, gent);
8753 }
8754
8755 if (eh->dyn_relocs == NULL
8756 || (!htab->elf.dynamic_sections_created
8757 && h->type != STT_GNU_IFUNC))
8758 return TRUE;
8759
8760 /* In the shared -Bsymbolic case, discard space allocated for
8761 dynamic pc-relative relocs against symbols which turn out to be
8762 defined in regular objects. For the normal shared case, discard
8763 space for relocs that have become local due to symbol visibility
8764 changes. */
8765
8766 if (info->shared)
8767 {
8768 /* Relocs that use pc_count are those that appear on a call insn,
8769 or certain REL relocs (see must_be_dyn_reloc) that can be
8770 generated via assembly. We want calls to protected symbols to
8771 resolve directly to the function rather than going via the plt.
8772 If people want function pointer comparisons to work as expected
8773 then they should avoid writing weird assembly. */
8774 if (SYMBOL_CALLS_LOCAL (info, h))
8775 {
8776 struct ppc_dyn_relocs **pp;
8777
8778 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8779 {
8780 p->count -= p->pc_count;
8781 p->pc_count = 0;
8782 if (p->count == 0)
8783 *pp = p->next;
8784 else
8785 pp = &p->next;
8786 }
8787 }
8788
8789 /* Also discard relocs on undefined weak syms with non-default
8790 visibility. */
8791 if (eh->dyn_relocs != NULL
8792 && h->root.type == bfd_link_hash_undefweak)
8793 {
8794 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8795 eh->dyn_relocs = NULL;
8796
8797 /* Make sure this symbol is output as a dynamic symbol.
8798 Undefined weak syms won't yet be marked as dynamic. */
8799 else if (h->dynindx == -1
8800 && !h->forced_local)
8801 {
8802 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8803 return FALSE;
8804 }
8805 }
8806 }
8807 else if (h->type == STT_GNU_IFUNC)
8808 {
8809 if (!h->non_got_ref)
8810 eh->dyn_relocs = NULL;
8811 }
8812 else if (ELIMINATE_COPY_RELOCS)
8813 {
8814 /* For the non-shared case, discard space for relocs against
8815 symbols which turn out to need copy relocs or are not
8816 dynamic. */
8817
8818 if (!h->non_got_ref
8819 && !h->def_regular)
8820 {
8821 /* Make sure this symbol is output as a dynamic symbol.
8822 Undefined weak syms won't yet be marked as dynamic. */
8823 if (h->dynindx == -1
8824 && !h->forced_local)
8825 {
8826 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8827 return FALSE;
8828 }
8829
8830 /* If that succeeded, we know we'll be keeping all the
8831 relocs. */
8832 if (h->dynindx != -1)
8833 goto keep;
8834 }
8835
8836 eh->dyn_relocs = NULL;
8837
8838 keep: ;
8839 }
8840
8841 /* Finally, allocate space. */
8842 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8843 {
8844 asection *sreloc = elf_section_data (p->sec)->sreloc;
8845 if (!htab->elf.dynamic_sections_created)
8846 sreloc = htab->reliplt;
8847 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8848 }
8849
8850 return TRUE;
8851 }
8852
8853 /* Find any dynamic relocs that apply to read-only sections. */
8854
8855 static bfd_boolean
8856 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8857 {
8858 struct ppc_link_hash_entry *eh;
8859 struct ppc_dyn_relocs *p;
8860
8861 if (h->root.type == bfd_link_hash_warning)
8862 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8863
8864 eh = (struct ppc_link_hash_entry *) h;
8865 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8866 {
8867 asection *s = p->sec->output_section;
8868
8869 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8870 {
8871 struct bfd_link_info *info = inf;
8872
8873 info->flags |= DF_TEXTREL;
8874
8875 /* Not an error, just cut short the traversal. */
8876 return FALSE;
8877 }
8878 }
8879 return TRUE;
8880 }
8881
8882 /* Set the sizes of the dynamic sections. */
8883
8884 static bfd_boolean
8885 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8886 struct bfd_link_info *info)
8887 {
8888 struct ppc_link_hash_table *htab;
8889 bfd *dynobj;
8890 asection *s;
8891 bfd_boolean relocs;
8892 bfd *ibfd;
8893 struct got_entry *first_tlsld;
8894
8895 htab = ppc_hash_table (info);
8896 if (htab == NULL)
8897 return FALSE;
8898
8899 dynobj = htab->elf.dynobj;
8900 if (dynobj == NULL)
8901 abort ();
8902
8903 if (htab->elf.dynamic_sections_created)
8904 {
8905 /* Set the contents of the .interp section to the interpreter. */
8906 if (info->executable)
8907 {
8908 s = bfd_get_section_by_name (dynobj, ".interp");
8909 if (s == NULL)
8910 abort ();
8911 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8912 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8913 }
8914 }
8915
8916 /* Set up .got offsets for local syms, and space for local dynamic
8917 relocs. */
8918 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8919 {
8920 struct got_entry **lgot_ents;
8921 struct got_entry **end_lgot_ents;
8922 struct plt_entry **local_plt;
8923 struct plt_entry **end_local_plt;
8924 unsigned char *lgot_masks;
8925 bfd_size_type locsymcount;
8926 Elf_Internal_Shdr *symtab_hdr;
8927 asection *srel;
8928
8929 if (!is_ppc64_elf (ibfd))
8930 continue;
8931
8932 for (s = ibfd->sections; s != NULL; s = s->next)
8933 {
8934 struct ppc_dyn_relocs *p;
8935
8936 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8937 {
8938 if (!bfd_is_abs_section (p->sec)
8939 && bfd_is_abs_section (p->sec->output_section))
8940 {
8941 /* Input section has been discarded, either because
8942 it is a copy of a linkonce section or due to
8943 linker script /DISCARD/, so we'll be discarding
8944 the relocs too. */
8945 }
8946 else if (p->count != 0)
8947 {
8948 srel = elf_section_data (p->sec)->sreloc;
8949 if (!htab->elf.dynamic_sections_created)
8950 srel = htab->reliplt;
8951 srel->size += p->count * sizeof (Elf64_External_Rela);
8952 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8953 info->flags |= DF_TEXTREL;
8954 }
8955 }
8956 }
8957
8958 lgot_ents = elf_local_got_ents (ibfd);
8959 if (!lgot_ents)
8960 continue;
8961
8962 symtab_hdr = &elf_symtab_hdr (ibfd);
8963 locsymcount = symtab_hdr->sh_info;
8964 end_lgot_ents = lgot_ents + locsymcount;
8965 local_plt = (struct plt_entry **) end_lgot_ents;
8966 end_local_plt = local_plt + locsymcount;
8967 lgot_masks = (unsigned char *) end_local_plt;
8968 s = ppc64_elf_tdata (ibfd)->got;
8969 srel = ppc64_elf_tdata (ibfd)->relgot;
8970 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8971 {
8972 struct got_entry **pent, *ent;
8973
8974 pent = lgot_ents;
8975 while ((ent = *pent) != NULL)
8976 if (ent->got.refcount > 0)
8977 {
8978 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8979 {
8980 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8981 *pent = ent->next;
8982 }
8983 else
8984 {
8985 unsigned int num = 1;
8986 ent->got.offset = s->size;
8987 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8988 num = 2;
8989 s->size += num * 8;
8990 if (info->shared)
8991 srel->size += num * sizeof (Elf64_External_Rela);
8992 else if ((*lgot_masks & PLT_IFUNC) != 0)
8993 {
8994 htab->reliplt->size
8995 += num * sizeof (Elf64_External_Rela);
8996 htab->got_reli_size
8997 += num * sizeof (Elf64_External_Rela);
8998 }
8999 pent = &ent->next;
9000 }
9001 }
9002 else
9003 *pent = ent->next;
9004 }
9005
9006 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9007 for (; local_plt < end_local_plt; ++local_plt)
9008 {
9009 struct plt_entry *ent;
9010
9011 for (ent = *local_plt; ent != NULL; ent = ent->next)
9012 if (ent->plt.refcount > 0)
9013 {
9014 s = htab->iplt;
9015 ent->plt.offset = s->size;
9016 s->size += PLT_ENTRY_SIZE;
9017
9018 htab->reliplt->size += sizeof (Elf64_External_Rela);
9019 }
9020 else
9021 ent->plt.offset = (bfd_vma) -1;
9022 }
9023 }
9024
9025 /* Allocate global sym .plt and .got entries, and space for global
9026 sym dynamic relocs. */
9027 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9028
9029 first_tlsld = NULL;
9030 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9031 {
9032 struct got_entry *ent;
9033
9034 if (!is_ppc64_elf (ibfd))
9035 continue;
9036
9037 ent = ppc64_tlsld_got (ibfd);
9038 if (ent->got.refcount > 0)
9039 {
9040 if (!htab->do_multi_toc && first_tlsld != NULL)
9041 {
9042 ent->is_indirect = TRUE;
9043 ent->got.ent = first_tlsld;
9044 }
9045 else
9046 {
9047 if (first_tlsld == NULL)
9048 first_tlsld = ent;
9049 s = ppc64_elf_tdata (ibfd)->got;
9050 ent->got.offset = s->size;
9051 ent->owner = ibfd;
9052 s->size += 16;
9053 if (info->shared)
9054 {
9055 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9056 srel->size += sizeof (Elf64_External_Rela);
9057 }
9058 }
9059 }
9060 else
9061 ent->got.offset = (bfd_vma) -1;
9062 }
9063
9064 /* We now have determined the sizes of the various dynamic sections.
9065 Allocate memory for them. */
9066 relocs = FALSE;
9067 for (s = dynobj->sections; s != NULL; s = s->next)
9068 {
9069 if ((s->flags & SEC_LINKER_CREATED) == 0)
9070 continue;
9071
9072 if (s == htab->brlt || s == htab->relbrlt)
9073 /* These haven't been allocated yet; don't strip. */
9074 continue;
9075 else if (s == htab->got
9076 || s == htab->plt
9077 || s == htab->iplt
9078 || s == htab->glink
9079 || s == htab->dynbss)
9080 {
9081 /* Strip this section if we don't need it; see the
9082 comment below. */
9083 }
9084 else if (CONST_STRNEQ (s->name, ".rela"))
9085 {
9086 if (s->size != 0)
9087 {
9088 if (s != htab->relplt)
9089 relocs = TRUE;
9090
9091 /* We use the reloc_count field as a counter if we need
9092 to copy relocs into the output file. */
9093 s->reloc_count = 0;
9094 }
9095 }
9096 else
9097 {
9098 /* It's not one of our sections, so don't allocate space. */
9099 continue;
9100 }
9101
9102 if (s->size == 0)
9103 {
9104 /* If we don't need this section, strip it from the
9105 output file. This is mostly to handle .rela.bss and
9106 .rela.plt. We must create both sections in
9107 create_dynamic_sections, because they must be created
9108 before the linker maps input sections to output
9109 sections. The linker does that before
9110 adjust_dynamic_symbol is called, and it is that
9111 function which decides whether anything needs to go
9112 into these sections. */
9113 s->flags |= SEC_EXCLUDE;
9114 continue;
9115 }
9116
9117 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9118 continue;
9119
9120 /* Allocate memory for the section contents. We use bfd_zalloc
9121 here in case unused entries are not reclaimed before the
9122 section's contents are written out. This should not happen,
9123 but this way if it does we get a R_PPC64_NONE reloc in .rela
9124 sections instead of garbage.
9125 We also rely on the section contents being zero when writing
9126 the GOT. */
9127 s->contents = bfd_zalloc (dynobj, s->size);
9128 if (s->contents == NULL)
9129 return FALSE;
9130 }
9131
9132 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9133 {
9134 if (!is_ppc64_elf (ibfd))
9135 continue;
9136
9137 s = ppc64_elf_tdata (ibfd)->got;
9138 if (s != NULL && s != htab->got)
9139 {
9140 if (s->size == 0)
9141 s->flags |= SEC_EXCLUDE;
9142 else
9143 {
9144 s->contents = bfd_zalloc (ibfd, s->size);
9145 if (s->contents == NULL)
9146 return FALSE;
9147 }
9148 }
9149 s = ppc64_elf_tdata (ibfd)->relgot;
9150 if (s != NULL)
9151 {
9152 if (s->size == 0)
9153 s->flags |= SEC_EXCLUDE;
9154 else
9155 {
9156 s->contents = bfd_zalloc (ibfd, s->size);
9157 if (s->contents == NULL)
9158 return FALSE;
9159 relocs = TRUE;
9160 s->reloc_count = 0;
9161 }
9162 }
9163 }
9164
9165 if (htab->elf.dynamic_sections_created)
9166 {
9167 /* Add some entries to the .dynamic section. We fill in the
9168 values later, in ppc64_elf_finish_dynamic_sections, but we
9169 must add the entries now so that we get the correct size for
9170 the .dynamic section. The DT_DEBUG entry is filled in by the
9171 dynamic linker and used by the debugger. */
9172 #define add_dynamic_entry(TAG, VAL) \
9173 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9174
9175 if (info->executable)
9176 {
9177 if (!add_dynamic_entry (DT_DEBUG, 0))
9178 return FALSE;
9179 }
9180
9181 if (htab->plt != NULL && htab->plt->size != 0)
9182 {
9183 if (!add_dynamic_entry (DT_PLTGOT, 0)
9184 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9185 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9186 || !add_dynamic_entry (DT_JMPREL, 0)
9187 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9188 return FALSE;
9189 }
9190
9191 if (NO_OPD_RELOCS)
9192 {
9193 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9194 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9195 return FALSE;
9196 }
9197
9198 if (!htab->no_tls_get_addr_opt
9199 && htab->tls_get_addr_fd != NULL
9200 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9201 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9202 return FALSE;
9203
9204 if (relocs)
9205 {
9206 if (!add_dynamic_entry (DT_RELA, 0)
9207 || !add_dynamic_entry (DT_RELASZ, 0)
9208 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9209 return FALSE;
9210
9211 /* If any dynamic relocs apply to a read-only section,
9212 then we need a DT_TEXTREL entry. */
9213 if ((info->flags & DF_TEXTREL) == 0)
9214 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9215
9216 if ((info->flags & DF_TEXTREL) != 0)
9217 {
9218 if (!add_dynamic_entry (DT_TEXTREL, 0))
9219 return FALSE;
9220 }
9221 }
9222 }
9223 #undef add_dynamic_entry
9224
9225 return TRUE;
9226 }
9227
9228 /* Determine the type of stub needed, if any, for a call. */
9229
9230 static inline enum ppc_stub_type
9231 ppc_type_of_stub (asection *input_sec,
9232 const Elf_Internal_Rela *rel,
9233 struct ppc_link_hash_entry **hash,
9234 struct plt_entry **plt_ent,
9235 bfd_vma destination)
9236 {
9237 struct ppc_link_hash_entry *h = *hash;
9238 bfd_vma location;
9239 bfd_vma branch_offset;
9240 bfd_vma max_branch_offset;
9241 enum elf_ppc64_reloc_type r_type;
9242
9243 if (h != NULL)
9244 {
9245 struct plt_entry *ent;
9246 struct ppc_link_hash_entry *fdh = h;
9247 if (h->oh != NULL
9248 && h->oh->is_func_descriptor)
9249 {
9250 fdh = ppc_follow_link (h->oh);
9251 *hash = fdh;
9252 }
9253
9254 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9255 if (ent->addend == rel->r_addend
9256 && ent->plt.offset != (bfd_vma) -1)
9257 {
9258 *plt_ent = ent;
9259 return ppc_stub_plt_call;
9260 }
9261
9262 /* Here, we know we don't have a plt entry. If we don't have a
9263 either a defined function descriptor or a defined entry symbol
9264 in a regular object file, then it is pointless trying to make
9265 any other type of stub. */
9266 if (!is_static_defined (&fdh->elf)
9267 && !is_static_defined (&h->elf))
9268 return ppc_stub_none;
9269 }
9270 else if (elf_local_got_ents (input_sec->owner) != NULL)
9271 {
9272 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9273 struct plt_entry **local_plt = (struct plt_entry **)
9274 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9275 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9276
9277 if (local_plt[r_symndx] != NULL)
9278 {
9279 struct plt_entry *ent;
9280
9281 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9282 if (ent->addend == rel->r_addend
9283 && ent->plt.offset != (bfd_vma) -1)
9284 {
9285 *plt_ent = ent;
9286 return ppc_stub_plt_call;
9287 }
9288 }
9289 }
9290
9291 /* Determine where the call point is. */
9292 location = (input_sec->output_offset
9293 + input_sec->output_section->vma
9294 + rel->r_offset);
9295
9296 branch_offset = destination - location;
9297 r_type = ELF64_R_TYPE (rel->r_info);
9298
9299 /* Determine if a long branch stub is needed. */
9300 max_branch_offset = 1 << 25;
9301 if (r_type != R_PPC64_REL24)
9302 max_branch_offset = 1 << 15;
9303
9304 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9305 /* We need a stub. Figure out whether a long_branch or plt_branch
9306 is needed later. */
9307 return ppc_stub_long_branch;
9308
9309 return ppc_stub_none;
9310 }
9311
9312 /* Build a .plt call stub. */
9313
9314 static inline bfd_byte *
9315 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
9316 {
9317 #define PPC_LO(v) ((v) & 0xffff)
9318 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9319 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9320
9321 if (PPC_HA (offset) != 0)
9322 {
9323 if (r != NULL)
9324 {
9325 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9326 r[1].r_offset = r[0].r_offset + 8;
9327 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9328 r[1].r_addend = r[0].r_addend;
9329 if (PPC_HA (offset + 16) != PPC_HA (offset))
9330 {
9331 r[2].r_offset = r[1].r_offset + 4;
9332 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9333 r[2].r_addend = r[0].r_addend;
9334 }
9335 else
9336 {
9337 r[2].r_offset = r[1].r_offset + 8;
9338 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9339 r[2].r_addend = r[0].r_addend + 8;
9340 r[3].r_offset = r[2].r_offset + 4;
9341 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9342 r[3].r_addend = r[0].r_addend + 16;
9343 }
9344 }
9345 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9346 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9347 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9348 if (PPC_HA (offset + 16) != PPC_HA (offset))
9349 {
9350 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9351 offset = 0;
9352 }
9353 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9354 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9355 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9356 bfd_put_32 (obfd, BCTR, p), p += 4;
9357 }
9358 else
9359 {
9360 if (r != NULL)
9361 {
9362 r[0].r_offset += 4;
9363 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9364 if (PPC_HA (offset + 16) != PPC_HA (offset))
9365 {
9366 r[1].r_offset = r[0].r_offset + 4;
9367 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9368 r[1].r_addend = r[0].r_addend;
9369 }
9370 else
9371 {
9372 r[1].r_offset = r[0].r_offset + 8;
9373 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9374 r[1].r_addend = r[0].r_addend + 16;
9375 r[2].r_offset = r[1].r_offset + 4;
9376 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9377 r[2].r_addend = r[0].r_addend + 8;
9378 }
9379 }
9380 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9381 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9382 if (PPC_HA (offset + 16) != PPC_HA (offset))
9383 {
9384 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9385 offset = 0;
9386 }
9387 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9388 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9389 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9390 bfd_put_32 (obfd, BCTR, p), p += 4;
9391 }
9392 return p;
9393 }
9394
9395 /* Build a special .plt call stub for __tls_get_addr. */
9396
9397 #define LD_R11_0R3 0xe9630000
9398 #define LD_R12_0R3 0xe9830000
9399 #define MR_R0_R3 0x7c601b78
9400 #define CMPDI_R11_0 0x2c2b0000
9401 #define ADD_R3_R12_R13 0x7c6c6a14
9402 #define BEQLR 0x4d820020
9403 #define MR_R3_R0 0x7c030378
9404 #define MFLR_R11 0x7d6802a6
9405 #define STD_R11_0R1 0xf9610000
9406 #define BCTRL 0x4e800421
9407 #define LD_R11_0R1 0xe9610000
9408 #define LD_R2_0R1 0xe8410000
9409 #define MTLR_R11 0x7d6803a6
9410
9411 static inline bfd_byte *
9412 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9413 Elf_Internal_Rela *r)
9414 {
9415 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9416 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9417 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9418 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9419 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9420 bfd_put_32 (obfd, BEQLR, p), p += 4;
9421 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9422 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9423 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9424
9425 if (r != NULL)
9426 r[0].r_offset += 9 * 4;
9427 p = build_plt_stub (obfd, p, offset, r);
9428 bfd_put_32 (obfd, BCTRL, p - 4);
9429
9430 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9431 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9432 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9433 bfd_put_32 (obfd, BLR, p), p += 4;
9434
9435 return p;
9436 }
9437
9438 static Elf_Internal_Rela *
9439 get_relocs (asection *sec, int count)
9440 {
9441 Elf_Internal_Rela *relocs;
9442 struct bfd_elf_section_data *elfsec_data;
9443
9444 elfsec_data = elf_section_data (sec);
9445 relocs = elfsec_data->relocs;
9446 if (relocs == NULL)
9447 {
9448 bfd_size_type relsize;
9449 relsize = sec->reloc_count * sizeof (*relocs);
9450 relocs = bfd_alloc (sec->owner, relsize);
9451 if (relocs == NULL)
9452 return NULL;
9453 elfsec_data->relocs = relocs;
9454 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9455 sizeof (Elf_Internal_Shdr));
9456 if (elfsec_data->rela.hdr == NULL)
9457 return NULL;
9458 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9459 * sizeof (Elf64_External_Rela));
9460 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9461 sec->reloc_count = 0;
9462 }
9463 relocs += sec->reloc_count;
9464 sec->reloc_count += count;
9465 return relocs;
9466 }
9467
9468 static bfd_vma
9469 get_r2off (struct ppc_link_hash_table *htab,
9470 struct ppc_stub_hash_entry *stub_entry)
9471 {
9472 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9473
9474 if (r2off == 0)
9475 {
9476 /* Support linking -R objects. Get the toc pointer from the
9477 opd entry. */
9478 char buf[8];
9479 asection *opd = stub_entry->h->elf.root.u.def.section;
9480 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9481
9482 if (strcmp (opd->name, ".opd") != 0
9483 || opd->reloc_count != 0)
9484 {
9485 (*_bfd_error_handler) (_("cannot find opd entry toc for %s"),
9486 stub_entry->h->elf.root.root.string);
9487 bfd_set_error (bfd_error_bad_value);
9488 return 0;
9489 }
9490 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9491 return 0;
9492 r2off = bfd_get_64 (opd->owner, buf);
9493 r2off -= elf_gp (stub_entry->id_sec->output_section->owner);
9494 }
9495 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9496 return r2off;
9497 }
9498
9499 static bfd_boolean
9500 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9501 {
9502 struct ppc_stub_hash_entry *stub_entry;
9503 struct ppc_branch_hash_entry *br_entry;
9504 struct bfd_link_info *info;
9505 struct ppc_link_hash_table *htab;
9506 bfd_byte *loc;
9507 bfd_byte *p;
9508 bfd_vma dest, off;
9509 int size;
9510 Elf_Internal_Rela *r;
9511 asection *plt;
9512
9513 /* Massage our args to the form they really have. */
9514 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9515 info = in_arg;
9516
9517 htab = ppc_hash_table (info);
9518 if (htab == NULL)
9519 return FALSE;
9520
9521 /* Make a note of the offset within the stubs for this entry. */
9522 stub_entry->stub_offset = stub_entry->stub_sec->size;
9523 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9524
9525 htab->stub_count[stub_entry->stub_type - 1] += 1;
9526 switch (stub_entry->stub_type)
9527 {
9528 case ppc_stub_long_branch:
9529 case ppc_stub_long_branch_r2off:
9530 /* Branches are relative. This is where we are going to. */
9531 off = dest = (stub_entry->target_value
9532 + stub_entry->target_section->output_offset
9533 + stub_entry->target_section->output_section->vma);
9534
9535 /* And this is where we are coming from. */
9536 off -= (stub_entry->stub_offset
9537 + stub_entry->stub_sec->output_offset
9538 + stub_entry->stub_sec->output_section->vma);
9539
9540 size = 4;
9541 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9542 {
9543 bfd_vma r2off = get_r2off (htab, stub_entry);
9544
9545 if (r2off == 0)
9546 {
9547 htab->stub_error = TRUE;
9548 return FALSE;
9549 }
9550 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9551 loc += 4;
9552 size = 12;
9553 if (PPC_HA (r2off) != 0)
9554 {
9555 size = 16;
9556 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9557 loc += 4;
9558 }
9559 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9560 loc += 4;
9561 off -= size - 4;
9562 }
9563 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9564
9565 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9566 {
9567 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9568 stub_entry->root.string);
9569 htab->stub_error = TRUE;
9570 return FALSE;
9571 }
9572
9573 if (info->emitrelocations)
9574 {
9575 r = get_relocs (stub_entry->stub_sec, 1);
9576 if (r == NULL)
9577 return FALSE;
9578 r->r_offset = loc - stub_entry->stub_sec->contents;
9579 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9580 r->r_addend = dest;
9581 if (stub_entry->h != NULL)
9582 {
9583 struct elf_link_hash_entry **hashes;
9584 unsigned long symndx;
9585 struct ppc_link_hash_entry *h;
9586
9587 hashes = elf_sym_hashes (htab->stub_bfd);
9588 if (hashes == NULL)
9589 {
9590 bfd_size_type hsize;
9591
9592 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9593 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9594 if (hashes == NULL)
9595 return FALSE;
9596 elf_sym_hashes (htab->stub_bfd) = hashes;
9597 htab->stub_globals = 1;
9598 }
9599 symndx = htab->stub_globals++;
9600 h = stub_entry->h;
9601 hashes[symndx] = &h->elf;
9602 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9603 if (h->oh != NULL && h->oh->is_func)
9604 h = ppc_follow_link (h->oh);
9605 if (h->elf.root.u.def.section != stub_entry->target_section)
9606 /* H is an opd symbol. The addend must be zero. */
9607 r->r_addend = 0;
9608 else
9609 {
9610 off = (h->elf.root.u.def.value
9611 + h->elf.root.u.def.section->output_offset
9612 + h->elf.root.u.def.section->output_section->vma);
9613 r->r_addend -= off;
9614 }
9615 }
9616 }
9617 break;
9618
9619 case ppc_stub_plt_branch:
9620 case ppc_stub_plt_branch_r2off:
9621 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9622 stub_entry->root.string + 9,
9623 FALSE, FALSE);
9624 if (br_entry == NULL)
9625 {
9626 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9627 stub_entry->root.string);
9628 htab->stub_error = TRUE;
9629 return FALSE;
9630 }
9631
9632 dest = (stub_entry->target_value
9633 + stub_entry->target_section->output_offset
9634 + stub_entry->target_section->output_section->vma);
9635
9636 bfd_put_64 (htab->brlt->owner, dest,
9637 htab->brlt->contents + br_entry->offset);
9638
9639 if (br_entry->iter == htab->stub_iteration)
9640 {
9641 br_entry->iter = 0;
9642
9643 if (htab->relbrlt != NULL)
9644 {
9645 /* Create a reloc for the branch lookup table entry. */
9646 Elf_Internal_Rela rela;
9647 bfd_byte *rl;
9648
9649 rela.r_offset = (br_entry->offset
9650 + htab->brlt->output_offset
9651 + htab->brlt->output_section->vma);
9652 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9653 rela.r_addend = dest;
9654
9655 rl = htab->relbrlt->contents;
9656 rl += (htab->relbrlt->reloc_count++
9657 * sizeof (Elf64_External_Rela));
9658 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9659 }
9660 else if (info->emitrelocations)
9661 {
9662 r = get_relocs (htab->brlt, 1);
9663 if (r == NULL)
9664 return FALSE;
9665 /* brlt, being SEC_LINKER_CREATED does not go through the
9666 normal reloc processing. Symbols and offsets are not
9667 translated from input file to output file form, so
9668 set up the offset per the output file. */
9669 r->r_offset = (br_entry->offset
9670 + htab->brlt->output_offset
9671 + htab->brlt->output_section->vma);
9672 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9673 r->r_addend = dest;
9674 }
9675 }
9676
9677 dest = (br_entry->offset
9678 + htab->brlt->output_offset
9679 + htab->brlt->output_section->vma);
9680
9681 off = (dest
9682 - elf_gp (htab->brlt->output_section->owner)
9683 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9684
9685 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9686 {
9687 (*_bfd_error_handler)
9688 (_("linkage table error against `%s'"),
9689 stub_entry->root.string);
9690 bfd_set_error (bfd_error_bad_value);
9691 htab->stub_error = TRUE;
9692 return FALSE;
9693 }
9694
9695 if (info->emitrelocations)
9696 {
9697 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9698 if (r == NULL)
9699 return FALSE;
9700 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9701 if (bfd_big_endian (info->output_bfd))
9702 r[0].r_offset += 2;
9703 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9704 r[0].r_offset += 4;
9705 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9706 r[0].r_addend = dest;
9707 if (PPC_HA (off) != 0)
9708 {
9709 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9710 r[1].r_offset = r[0].r_offset + 4;
9711 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9712 r[1].r_addend = r[0].r_addend;
9713 }
9714 }
9715
9716 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9717 {
9718 if (PPC_HA (off) != 0)
9719 {
9720 size = 16;
9721 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9722 loc += 4;
9723 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9724 }
9725 else
9726 {
9727 size = 12;
9728 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9729 }
9730 }
9731 else
9732 {
9733 bfd_vma r2off = get_r2off (htab, stub_entry);
9734
9735 if (r2off == 0)
9736 {
9737 htab->stub_error = TRUE;
9738 return FALSE;
9739 }
9740
9741 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9742 loc += 4;
9743 size = 20;
9744 if (PPC_HA (off) != 0)
9745 {
9746 size += 4;
9747 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9748 loc += 4;
9749 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9750 loc += 4;
9751 }
9752 else
9753 {
9754 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9755 loc += 4;
9756 }
9757
9758 if (PPC_HA (r2off) != 0)
9759 {
9760 size += 4;
9761 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9762 loc += 4;
9763 }
9764 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9765 }
9766 loc += 4;
9767 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9768 loc += 4;
9769 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9770 break;
9771
9772 case ppc_stub_plt_call:
9773 if (stub_entry->h != NULL
9774 && stub_entry->h->is_func_descriptor
9775 && stub_entry->h->oh != NULL)
9776 {
9777 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9778
9779 /* If the old-ABI "dot-symbol" is undefined make it weak so
9780 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9781 FIXME: We used to define the symbol on one of the call
9782 stubs instead, which is why we test symbol section id
9783 against htab->top_id in various places. Likely all
9784 these checks could now disappear. */
9785 if (fh->elf.root.type == bfd_link_hash_undefined)
9786 fh->elf.root.type = bfd_link_hash_undefweak;
9787 }
9788
9789 /* Now build the stub. */
9790 dest = stub_entry->plt_ent->plt.offset & ~1;
9791 if (dest >= (bfd_vma) -2)
9792 abort ();
9793
9794 plt = htab->plt;
9795 if (!htab->elf.dynamic_sections_created
9796 || stub_entry->h == NULL
9797 || stub_entry->h->elf.dynindx == -1)
9798 plt = htab->iplt;
9799
9800 dest += plt->output_offset + plt->output_section->vma;
9801
9802 if (stub_entry->h == NULL
9803 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9804 {
9805 Elf_Internal_Rela rela;
9806 bfd_byte *rl;
9807
9808 rela.r_offset = dest;
9809 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9810 rela.r_addend = (stub_entry->target_value
9811 + stub_entry->target_section->output_offset
9812 + stub_entry->target_section->output_section->vma);
9813
9814 rl = (htab->reliplt->contents
9815 + (htab->reliplt->reloc_count++
9816 * sizeof (Elf64_External_Rela)));
9817 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9818 stub_entry->plt_ent->plt.offset |= 1;
9819 }
9820
9821 off = (dest
9822 - elf_gp (plt->output_section->owner)
9823 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9824
9825 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9826 {
9827 (*_bfd_error_handler)
9828 (_("linkage table error against `%s'"),
9829 stub_entry->h != NULL
9830 ? stub_entry->h->elf.root.root.string
9831 : "<local sym>");
9832 bfd_set_error (bfd_error_bad_value);
9833 htab->stub_error = TRUE;
9834 return FALSE;
9835 }
9836
9837 r = NULL;
9838 if (info->emitrelocations)
9839 {
9840 r = get_relocs (stub_entry->stub_sec,
9841 (2 + (PPC_HA (off) != 0)
9842 + (PPC_HA (off + 16) == PPC_HA (off))));
9843 if (r == NULL)
9844 return FALSE;
9845 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9846 if (bfd_big_endian (info->output_bfd))
9847 r[0].r_offset += 2;
9848 r[0].r_addend = dest;
9849 }
9850 if (stub_entry->h != NULL
9851 && (stub_entry->h == htab->tls_get_addr_fd
9852 || stub_entry->h == htab->tls_get_addr)
9853 && !htab->no_tls_get_addr_opt)
9854 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9855 else
9856 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9857 size = p - loc;
9858 break;
9859
9860 default:
9861 BFD_FAIL ();
9862 return FALSE;
9863 }
9864
9865 stub_entry->stub_sec->size += size;
9866
9867 if (htab->emit_stub_syms)
9868 {
9869 struct elf_link_hash_entry *h;
9870 size_t len1, len2;
9871 char *name;
9872 const char *const stub_str[] = { "long_branch",
9873 "long_branch_r2off",
9874 "plt_branch",
9875 "plt_branch_r2off",
9876 "plt_call" };
9877
9878 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9879 len2 = strlen (stub_entry->root.string);
9880 name = bfd_malloc (len1 + len2 + 2);
9881 if (name == NULL)
9882 return FALSE;
9883 memcpy (name, stub_entry->root.string, 9);
9884 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9885 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9886 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9887 if (h == NULL)
9888 return FALSE;
9889 if (h->root.type == bfd_link_hash_new)
9890 {
9891 h->root.type = bfd_link_hash_defined;
9892 h->root.u.def.section = stub_entry->stub_sec;
9893 h->root.u.def.value = stub_entry->stub_offset;
9894 h->ref_regular = 1;
9895 h->def_regular = 1;
9896 h->ref_regular_nonweak = 1;
9897 h->forced_local = 1;
9898 h->non_elf = 0;
9899 }
9900 }
9901
9902 return TRUE;
9903 }
9904
9905 /* As above, but don't actually build the stub. Just bump offset so
9906 we know stub section sizes, and select plt_branch stubs where
9907 long_branch stubs won't do. */
9908
9909 static bfd_boolean
9910 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9911 {
9912 struct ppc_stub_hash_entry *stub_entry;
9913 struct bfd_link_info *info;
9914 struct ppc_link_hash_table *htab;
9915 bfd_vma off;
9916 int size;
9917
9918 /* Massage our args to the form they really have. */
9919 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9920 info = in_arg;
9921
9922 htab = ppc_hash_table (info);
9923 if (htab == NULL)
9924 return FALSE;
9925
9926 if (stub_entry->stub_type == ppc_stub_plt_call)
9927 {
9928 asection *plt;
9929 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9930 if (off >= (bfd_vma) -2)
9931 abort ();
9932 plt = htab->plt;
9933 if (!htab->elf.dynamic_sections_created
9934 || stub_entry->h == NULL
9935 || stub_entry->h->elf.dynindx == -1)
9936 plt = htab->iplt;
9937 off += (plt->output_offset
9938 + plt->output_section->vma
9939 - elf_gp (plt->output_section->owner)
9940 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9941
9942 size = PLT_CALL_STUB_SIZE;
9943 if (PPC_HA (off) == 0)
9944 size -= 4;
9945 if (PPC_HA (off + 16) != PPC_HA (off))
9946 size += 4;
9947 if (stub_entry->h != NULL
9948 && (stub_entry->h == htab->tls_get_addr_fd
9949 || stub_entry->h == htab->tls_get_addr)
9950 && !htab->no_tls_get_addr_opt)
9951 size += 13 * 4;
9952 if (info->emitrelocations)
9953 {
9954 stub_entry->stub_sec->reloc_count
9955 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9956 stub_entry->stub_sec->flags |= SEC_RELOC;
9957 }
9958 }
9959 else
9960 {
9961 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9962 variants. */
9963 bfd_vma r2off = 0;
9964
9965 off = (stub_entry->target_value
9966 + stub_entry->target_section->output_offset
9967 + stub_entry->target_section->output_section->vma);
9968 off -= (stub_entry->stub_sec->size
9969 + stub_entry->stub_sec->output_offset
9970 + stub_entry->stub_sec->output_section->vma);
9971
9972 /* Reset the stub type from the plt variant in case we now
9973 can reach with a shorter stub. */
9974 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9975 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9976
9977 size = 4;
9978 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9979 {
9980 r2off = get_r2off (htab, stub_entry);
9981 if (r2off == 0)
9982 {
9983 htab->stub_error = TRUE;
9984 return FALSE;
9985 }
9986 size = 12;
9987 if (PPC_HA (r2off) != 0)
9988 size = 16;
9989 off -= size - 4;
9990 }
9991
9992 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9993 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9994 {
9995 struct ppc_branch_hash_entry *br_entry;
9996
9997 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9998 stub_entry->root.string + 9,
9999 TRUE, FALSE);
10000 if (br_entry == NULL)
10001 {
10002 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
10003 stub_entry->root.string);
10004 htab->stub_error = TRUE;
10005 return FALSE;
10006 }
10007
10008 if (br_entry->iter != htab->stub_iteration)
10009 {
10010 br_entry->iter = htab->stub_iteration;
10011 br_entry->offset = htab->brlt->size;
10012 htab->brlt->size += 8;
10013
10014 if (htab->relbrlt != NULL)
10015 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10016 else if (info->emitrelocations)
10017 {
10018 htab->brlt->reloc_count += 1;
10019 htab->brlt->flags |= SEC_RELOC;
10020 }
10021 }
10022
10023 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10024 off = (br_entry->offset
10025 + htab->brlt->output_offset
10026 + htab->brlt->output_section->vma
10027 - elf_gp (htab->brlt->output_section->owner)
10028 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10029
10030 if (info->emitrelocations)
10031 {
10032 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10033 stub_entry->stub_sec->flags |= SEC_RELOC;
10034 }
10035
10036 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10037 {
10038 size = 12;
10039 if (PPC_HA (off) != 0)
10040 size = 16;
10041 }
10042 else
10043 {
10044 size = 20;
10045 if (PPC_HA (off) != 0)
10046 size += 4;
10047
10048 if (PPC_HA (r2off) != 0)
10049 size += 4;
10050 }
10051 }
10052 else if (info->emitrelocations)
10053 {
10054 stub_entry->stub_sec->reloc_count += 1;
10055 stub_entry->stub_sec->flags |= SEC_RELOC;
10056 }
10057 }
10058
10059 stub_entry->stub_sec->size += size;
10060 return TRUE;
10061 }
10062
10063 /* Set up various things so that we can make a list of input sections
10064 for each output section included in the link. Returns -1 on error,
10065 0 when no stubs will be needed, and 1 on success. */
10066
10067 int
10068 ppc64_elf_setup_section_lists
10069 (struct bfd_link_info *info,
10070 asection *(*add_stub_section) (const char *, asection *),
10071 void (*layout_sections_again) (void))
10072 {
10073 bfd *input_bfd;
10074 int top_id, top_index, id;
10075 asection *section;
10076 asection **input_list;
10077 bfd_size_type amt;
10078 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10079
10080 if (htab == NULL)
10081 return -1;
10082 /* Stash our params away. */
10083 htab->add_stub_section = add_stub_section;
10084 htab->layout_sections_again = layout_sections_again;
10085
10086 if (htab->brlt == NULL)
10087 return 0;
10088
10089 /* Find the top input section id. */
10090 for (input_bfd = info->input_bfds, top_id = 3;
10091 input_bfd != NULL;
10092 input_bfd = input_bfd->link_next)
10093 {
10094 for (section = input_bfd->sections;
10095 section != NULL;
10096 section = section->next)
10097 {
10098 if (top_id < section->id)
10099 top_id = section->id;
10100 }
10101 }
10102
10103 htab->top_id = top_id;
10104 amt = sizeof (struct map_stub) * (top_id + 1);
10105 htab->stub_group = bfd_zmalloc (amt);
10106 if (htab->stub_group == NULL)
10107 return -1;
10108
10109 /* Set toc_off for com, und, abs and ind sections. */
10110 for (id = 0; id < 3; id++)
10111 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10112
10113 /* We can't use output_bfd->section_count here to find the top output
10114 section index as some sections may have been removed, and
10115 strip_excluded_output_sections doesn't renumber the indices. */
10116 for (section = info->output_bfd->sections, top_index = 0;
10117 section != NULL;
10118 section = section->next)
10119 {
10120 if (top_index < section->index)
10121 top_index = section->index;
10122 }
10123
10124 htab->top_index = top_index;
10125 amt = sizeof (asection *) * (top_index + 1);
10126 input_list = bfd_zmalloc (amt);
10127 htab->input_list = input_list;
10128 if (input_list == NULL)
10129 return -1;
10130
10131 return 1;
10132 }
10133
10134 /* Set up for first pass at multitoc partitioning. */
10135
10136 void
10137 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10138 {
10139 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10140
10141 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10142 htab->toc_curr = elf_gp (info->output_bfd);
10143 htab->toc_bfd = NULL;
10144 htab->toc_first_sec = NULL;
10145 }
10146
10147 /* The linker repeatedly calls this function for each TOC input section
10148 and linker generated GOT section. Group input bfds such that the toc
10149 within a group is less than 64k in size. */
10150
10151 bfd_boolean
10152 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10153 {
10154 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10155 bfd_vma addr, off, limit;
10156
10157 if (htab == NULL)
10158 return FALSE;
10159
10160 if (!htab->second_toc_pass)
10161 {
10162 /* Keep track of the first .toc or .got section for this input bfd. */
10163 if (htab->toc_bfd != isec->owner)
10164 {
10165 htab->toc_bfd = isec->owner;
10166 htab->toc_first_sec = isec;
10167 }
10168
10169 addr = isec->output_offset + isec->output_section->vma;
10170 off = addr - htab->toc_curr;
10171 limit = 0x80008000;
10172 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10173 limit = 0x10000;
10174 if (off + isec->size > limit)
10175 {
10176 addr = (htab->toc_first_sec->output_offset
10177 + htab->toc_first_sec->output_section->vma);
10178 htab->toc_curr = addr;
10179 }
10180
10181 /* toc_curr is the base address of this toc group. Set elf_gp
10182 for the input section to be the offset relative to the
10183 output toc base plus 0x8000. Making the input elf_gp an
10184 offset allows us to move the toc as a whole without
10185 recalculating input elf_gp. */
10186 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10187 off += TOC_BASE_OFF;
10188
10189 /* Die if someone uses a linker script that doesn't keep input
10190 file .toc and .got together. */
10191 if (elf_gp (isec->owner) != 0
10192 && elf_gp (isec->owner) != off)
10193 return FALSE;
10194
10195 elf_gp (isec->owner) = off;
10196 return TRUE;
10197 }
10198
10199 /* During the second pass toc_first_sec points to the start of
10200 a toc group, and toc_curr is used to track the old elf_gp.
10201 We use toc_bfd to ensure we only look at each bfd once. */
10202 if (htab->toc_bfd == isec->owner)
10203 return TRUE;
10204 htab->toc_bfd = isec->owner;
10205
10206 if (htab->toc_first_sec == NULL
10207 || htab->toc_curr != elf_gp (isec->owner))
10208 {
10209 htab->toc_curr = elf_gp (isec->owner);
10210 htab->toc_first_sec = isec;
10211 }
10212 addr = (htab->toc_first_sec->output_offset
10213 + htab->toc_first_sec->output_section->vma);
10214 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10215 elf_gp (isec->owner) = off;
10216
10217 return TRUE;
10218 }
10219
10220 /* Called via elf_link_hash_traverse to merge GOT entries for global
10221 symbol H. */
10222
10223 static bfd_boolean
10224 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10225 {
10226 if (h->root.type == bfd_link_hash_indirect)
10227 return TRUE;
10228
10229 if (h->root.type == bfd_link_hash_warning)
10230 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10231
10232 merge_got_entries (&h->got.glist);
10233
10234 return TRUE;
10235 }
10236
10237 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10238 symbol H. */
10239
10240 static bfd_boolean
10241 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10242 {
10243 struct got_entry *gent;
10244
10245 if (h->root.type == bfd_link_hash_indirect)
10246 return TRUE;
10247
10248 if (h->root.type == bfd_link_hash_warning)
10249 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10250
10251 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10252 if (!gent->is_indirect)
10253 allocate_got (h, (struct bfd_link_info *) inf, gent);
10254 return TRUE;
10255 }
10256
10257 /* Called on the first multitoc pass after the last call to
10258 ppc64_elf_next_toc_section. This function removes duplicate GOT
10259 entries. */
10260
10261 bfd_boolean
10262 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10263 {
10264 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10265 struct bfd *ibfd, *ibfd2;
10266 bfd_boolean done_something;
10267
10268 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10269
10270 if (!htab->do_multi_toc)
10271 return FALSE;
10272
10273 /* Merge global sym got entries within a toc group. */
10274 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10275
10276 /* And tlsld_got. */
10277 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10278 {
10279 struct got_entry *ent, *ent2;
10280
10281 if (!is_ppc64_elf (ibfd))
10282 continue;
10283
10284 ent = ppc64_tlsld_got (ibfd);
10285 if (!ent->is_indirect
10286 && ent->got.offset != (bfd_vma) -1)
10287 {
10288 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10289 {
10290 if (!is_ppc64_elf (ibfd2))
10291 continue;
10292
10293 ent2 = ppc64_tlsld_got (ibfd2);
10294 if (!ent2->is_indirect
10295 && ent2->got.offset != (bfd_vma) -1
10296 && elf_gp (ibfd2) == elf_gp (ibfd))
10297 {
10298 ent2->is_indirect = TRUE;
10299 ent2->got.ent = ent;
10300 }
10301 }
10302 }
10303 }
10304
10305 /* Zap sizes of got sections. */
10306 htab->reliplt->rawsize = htab->reliplt->size;
10307 htab->reliplt->size -= htab->got_reli_size;
10308 htab->got_reli_size = 0;
10309
10310 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10311 {
10312 asection *got, *relgot;
10313
10314 if (!is_ppc64_elf (ibfd))
10315 continue;
10316
10317 got = ppc64_elf_tdata (ibfd)->got;
10318 if (got != NULL)
10319 {
10320 got->rawsize = got->size;
10321 got->size = 0;
10322 relgot = ppc64_elf_tdata (ibfd)->relgot;
10323 relgot->rawsize = relgot->size;
10324 relgot->size = 0;
10325 }
10326 }
10327
10328 /* Now reallocate the got, local syms first. We don't need to
10329 allocate section contents again since we never increase size. */
10330 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10331 {
10332 struct got_entry **lgot_ents;
10333 struct got_entry **end_lgot_ents;
10334 struct plt_entry **local_plt;
10335 struct plt_entry **end_local_plt;
10336 unsigned char *lgot_masks;
10337 bfd_size_type locsymcount;
10338 Elf_Internal_Shdr *symtab_hdr;
10339 asection *s, *srel;
10340
10341 if (!is_ppc64_elf (ibfd))
10342 continue;
10343
10344 lgot_ents = elf_local_got_ents (ibfd);
10345 if (!lgot_ents)
10346 continue;
10347
10348 symtab_hdr = &elf_symtab_hdr (ibfd);
10349 locsymcount = symtab_hdr->sh_info;
10350 end_lgot_ents = lgot_ents + locsymcount;
10351 local_plt = (struct plt_entry **) end_lgot_ents;
10352 end_local_plt = local_plt + locsymcount;
10353 lgot_masks = (unsigned char *) end_local_plt;
10354 s = ppc64_elf_tdata (ibfd)->got;
10355 srel = ppc64_elf_tdata (ibfd)->relgot;
10356 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10357 {
10358 struct got_entry *ent;
10359
10360 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10361 {
10362 unsigned int num = 1;
10363 ent->got.offset = s->size;
10364 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10365 num = 2;
10366 s->size += num * 8;
10367 if (info->shared)
10368 srel->size += num * sizeof (Elf64_External_Rela);
10369 else if ((*lgot_masks & PLT_IFUNC) != 0)
10370 {
10371 htab->reliplt->size
10372 += num * sizeof (Elf64_External_Rela);
10373 htab->got_reli_size
10374 += num * sizeof (Elf64_External_Rela);
10375 }
10376 }
10377 }
10378 }
10379
10380 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10381
10382 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10383 {
10384 struct got_entry *ent;
10385
10386 if (!is_ppc64_elf (ibfd))
10387 continue;
10388
10389 ent = ppc64_tlsld_got (ibfd);
10390 if (!ent->is_indirect
10391 && ent->got.offset != (bfd_vma) -1)
10392 {
10393 asection *s = ppc64_elf_tdata (ibfd)->got;
10394 ent->got.offset = s->size;
10395 s->size += 16;
10396 if (info->shared)
10397 {
10398 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10399 srel->size += sizeof (Elf64_External_Rela);
10400 }
10401 }
10402 }
10403
10404 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10405 if (!done_something)
10406 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10407 {
10408 asection *got;
10409
10410 if (!is_ppc64_elf (ibfd))
10411 continue;
10412
10413 got = ppc64_elf_tdata (ibfd)->got;
10414 if (got != NULL)
10415 {
10416 done_something = got->rawsize != got->size;
10417 if (done_something)
10418 break;
10419 }
10420 }
10421
10422 if (done_something)
10423 (*htab->layout_sections_again) ();
10424
10425 /* Set up for second pass over toc sections to recalculate elf_gp
10426 on input sections. */
10427 htab->toc_bfd = NULL;
10428 htab->toc_first_sec = NULL;
10429 htab->second_toc_pass = TRUE;
10430 return done_something;
10431 }
10432
10433 /* Called after second pass of multitoc partitioning. */
10434
10435 void
10436 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10437 {
10438 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10439
10440 /* After the second pass, toc_curr tracks the TOC offset used
10441 for code sections below in ppc64_elf_next_input_section. */
10442 htab->toc_curr = TOC_BASE_OFF;
10443 }
10444
10445 /* No toc references were found in ISEC. If the code in ISEC makes no
10446 calls, then there's no need to use toc adjusting stubs when branching
10447 into ISEC. Actually, indirect calls from ISEC are OK as they will
10448 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10449 needed, and 2 if a cyclical call-graph was found but no other reason
10450 for a stub was detected. If called from the top level, a return of
10451 2 means the same as a return of 0. */
10452
10453 static int
10454 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10455 {
10456 int ret;
10457
10458 /* Mark this section as checked. */
10459 isec->call_check_done = 1;
10460
10461 /* We know none of our code bearing sections will need toc stubs. */
10462 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10463 return 0;
10464
10465 if (isec->size == 0)
10466 return 0;
10467
10468 if (isec->output_section == NULL)
10469 return 0;
10470
10471 ret = 0;
10472 if (isec->reloc_count != 0)
10473 {
10474 Elf_Internal_Rela *relstart, *rel;
10475 Elf_Internal_Sym *local_syms;
10476 struct ppc_link_hash_table *htab;
10477
10478 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10479 info->keep_memory);
10480 if (relstart == NULL)
10481 return -1;
10482
10483 /* Look for branches to outside of this section. */
10484 local_syms = NULL;
10485 htab = ppc_hash_table (info);
10486 if (htab == NULL)
10487 return -1;
10488
10489 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10490 {
10491 enum elf_ppc64_reloc_type r_type;
10492 unsigned long r_symndx;
10493 struct elf_link_hash_entry *h;
10494 struct ppc_link_hash_entry *eh;
10495 Elf_Internal_Sym *sym;
10496 asection *sym_sec;
10497 struct _opd_sec_data *opd;
10498 bfd_vma sym_value;
10499 bfd_vma dest;
10500
10501 r_type = ELF64_R_TYPE (rel->r_info);
10502 if (r_type != R_PPC64_REL24
10503 && r_type != R_PPC64_REL14
10504 && r_type != R_PPC64_REL14_BRTAKEN
10505 && r_type != R_PPC64_REL14_BRNTAKEN)
10506 continue;
10507
10508 r_symndx = ELF64_R_SYM (rel->r_info);
10509 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10510 isec->owner))
10511 {
10512 ret = -1;
10513 break;
10514 }
10515
10516 /* Calls to dynamic lib functions go through a plt call stub
10517 that uses r2. */
10518 eh = (struct ppc_link_hash_entry *) h;
10519 if (eh != NULL
10520 && (eh->elf.plt.plist != NULL
10521 || (eh->oh != NULL
10522 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10523 {
10524 ret = 1;
10525 break;
10526 }
10527
10528 if (sym_sec == NULL)
10529 /* Ignore other undefined symbols. */
10530 continue;
10531
10532 /* Assume branches to other sections not included in the
10533 link need stubs too, to cover -R and absolute syms. */
10534 if (sym_sec->output_section == NULL)
10535 {
10536 ret = 1;
10537 break;
10538 }
10539
10540 if (h == NULL)
10541 sym_value = sym->st_value;
10542 else
10543 {
10544 if (h->root.type != bfd_link_hash_defined
10545 && h->root.type != bfd_link_hash_defweak)
10546 abort ();
10547 sym_value = h->root.u.def.value;
10548 }
10549 sym_value += rel->r_addend;
10550
10551 /* If this branch reloc uses an opd sym, find the code section. */
10552 opd = get_opd_info (sym_sec);
10553 if (opd != NULL)
10554 {
10555 if (h == NULL && opd->adjust != NULL)
10556 {
10557 long adjust;
10558
10559 adjust = opd->adjust[sym->st_value / 8];
10560 if (adjust == -1)
10561 /* Assume deleted functions won't ever be called. */
10562 continue;
10563 sym_value += adjust;
10564 }
10565
10566 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10567 if (dest == (bfd_vma) -1)
10568 continue;
10569 }
10570 else
10571 dest = (sym_value
10572 + sym_sec->output_offset
10573 + sym_sec->output_section->vma);
10574
10575 /* Ignore branch to self. */
10576 if (sym_sec == isec)
10577 continue;
10578
10579 /* If the called function uses the toc, we need a stub. */
10580 if (sym_sec->has_toc_reloc
10581 || sym_sec->makes_toc_func_call)
10582 {
10583 ret = 1;
10584 break;
10585 }
10586
10587 /* Assume any branch that needs a long branch stub might in fact
10588 need a plt_branch stub. A plt_branch stub uses r2. */
10589 else if (dest - (isec->output_offset
10590 + isec->output_section->vma
10591 + rel->r_offset) + (1 << 25) >= (2 << 25))
10592 {
10593 ret = 1;
10594 break;
10595 }
10596
10597 /* If calling back to a section in the process of being
10598 tested, we can't say for sure that no toc adjusting stubs
10599 are needed, so don't return zero. */
10600 else if (sym_sec->call_check_in_progress)
10601 ret = 2;
10602
10603 /* Branches to another section that itself doesn't have any TOC
10604 references are OK. Recursively call ourselves to check. */
10605 else if (!sym_sec->call_check_done)
10606 {
10607 int recur;
10608
10609 /* Mark current section as indeterminate, so that other
10610 sections that call back to current won't be marked as
10611 known. */
10612 isec->call_check_in_progress = 1;
10613 recur = toc_adjusting_stub_needed (info, sym_sec);
10614 isec->call_check_in_progress = 0;
10615
10616 if (recur != 0)
10617 {
10618 ret = recur;
10619 if (recur != 2)
10620 break;
10621 }
10622 }
10623 }
10624
10625 if (local_syms != NULL
10626 && (elf_symtab_hdr (isec->owner).contents
10627 != (unsigned char *) local_syms))
10628 free (local_syms);
10629 if (elf_section_data (isec)->relocs != relstart)
10630 free (relstart);
10631 }
10632
10633 if ((ret & 1) == 0
10634 && isec->map_head.s != NULL
10635 && (strcmp (isec->output_section->name, ".init") == 0
10636 || strcmp (isec->output_section->name, ".fini") == 0))
10637 {
10638 if (isec->map_head.s->has_toc_reloc
10639 || isec->map_head.s->makes_toc_func_call)
10640 ret = 1;
10641 else if (!isec->map_head.s->call_check_done)
10642 {
10643 int recur;
10644 isec->call_check_in_progress = 1;
10645 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10646 isec->call_check_in_progress = 0;
10647 if (recur != 0)
10648 ret = recur;
10649 }
10650 }
10651
10652 if (ret == 1)
10653 isec->makes_toc_func_call = 1;
10654
10655 return ret;
10656 }
10657
10658 /* The linker repeatedly calls this function for each input section,
10659 in the order that input sections are linked into output sections.
10660 Build lists of input sections to determine groupings between which
10661 we may insert linker stubs. */
10662
10663 bfd_boolean
10664 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10665 {
10666 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10667
10668 if (htab == NULL)
10669 return FALSE;
10670
10671 if ((isec->output_section->flags & SEC_CODE) != 0
10672 && isec->output_section->index <= htab->top_index)
10673 {
10674 asection **list = htab->input_list + isec->output_section->index;
10675 /* Steal the link_sec pointer for our list. */
10676 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10677 /* This happens to make the list in reverse order,
10678 which is what we want. */
10679 PREV_SEC (isec) = *list;
10680 *list = isec;
10681 }
10682
10683 if (htab->multi_toc_needed)
10684 {
10685 /* If a code section has a function that uses the TOC then we need
10686 to use the right TOC (obviously). Also, make sure that .opd gets
10687 the correct TOC value for R_PPC64_TOC relocs that don't have or
10688 can't find their function symbol (shouldn't ever happen now).
10689 Also specially treat .fixup for the linux kernel. .fixup
10690 contains branches, but only back to the function that hit an
10691 exception. */
10692 if (isec->has_toc_reloc
10693 || (isec->flags & SEC_CODE) == 0
10694 || strcmp (isec->name, ".fixup") == 0)
10695 {
10696 if (elf_gp (isec->owner) != 0)
10697 htab->toc_curr = elf_gp (isec->owner);
10698 }
10699 else
10700 {
10701 if (!isec->call_check_done
10702 && toc_adjusting_stub_needed (info, isec) < 0)
10703 return FALSE;
10704 /* If we make a local call from this section, ie. a branch
10705 without a following nop, then we have no place to put a
10706 toc restoring insn. We must use the same toc group as
10707 the callee.
10708 Testing makes_toc_func_call actually tests for *any*
10709 calls to functions that need a good toc pointer. A more
10710 precise test would be better, as this one will set
10711 incorrect values for pasted .init/.fini fragments.
10712 (Fixed later in check_pasted_section.) */
10713 if (isec->makes_toc_func_call
10714 && elf_gp (isec->owner) != 0)
10715 htab->toc_curr = elf_gp (isec->owner);
10716 }
10717 }
10718
10719 /* Functions that don't use the TOC can belong in any TOC group.
10720 Use the last TOC base. */
10721 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10722 return TRUE;
10723 }
10724
10725 /* Check that all .init and .fini sections use the same toc, if they
10726 have toc relocs. */
10727
10728 static bfd_boolean
10729 check_pasted_section (struct bfd_link_info *info, const char *name)
10730 {
10731 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10732
10733 if (o != NULL)
10734 {
10735 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10736 bfd_vma toc_off = 0;
10737 asection *i;
10738
10739 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10740 if (i->has_toc_reloc)
10741 {
10742 if (toc_off == 0)
10743 toc_off = htab->stub_group[i->id].toc_off;
10744 else if (toc_off != htab->stub_group[i->id].toc_off)
10745 return FALSE;
10746 }
10747
10748 if (toc_off == 0)
10749 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10750 if (i->makes_toc_func_call)
10751 {
10752 toc_off = htab->stub_group[i->id].toc_off;
10753 break;
10754 }
10755
10756 /* Make sure the whole pasted function uses the same toc offset. */
10757 if (toc_off != 0)
10758 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10759 htab->stub_group[i->id].toc_off = toc_off;
10760 }
10761 return TRUE;
10762 }
10763
10764 bfd_boolean
10765 ppc64_elf_check_init_fini (struct bfd_link_info *info)
10766 {
10767 return (check_pasted_section (info, ".init")
10768 & check_pasted_section (info, ".fini"));
10769 }
10770
10771 /* See whether we can group stub sections together. Grouping stub
10772 sections may result in fewer stubs. More importantly, we need to
10773 put all .init* and .fini* stubs at the beginning of the .init or
10774 .fini output sections respectively, because glibc splits the
10775 _init and _fini functions into multiple parts. Putting a stub in
10776 the middle of a function is not a good idea. */
10777
10778 static void
10779 group_sections (struct ppc_link_hash_table *htab,
10780 bfd_size_type stub_group_size,
10781 bfd_boolean stubs_always_before_branch)
10782 {
10783 asection **list;
10784 bfd_size_type stub14_group_size;
10785 bfd_boolean suppress_size_errors;
10786
10787 suppress_size_errors = FALSE;
10788 stub14_group_size = stub_group_size;
10789 if (stub_group_size == 1)
10790 {
10791 /* Default values. */
10792 if (stubs_always_before_branch)
10793 {
10794 stub_group_size = 0x1e00000;
10795 stub14_group_size = 0x7800;
10796 }
10797 else
10798 {
10799 stub_group_size = 0x1c00000;
10800 stub14_group_size = 0x7000;
10801 }
10802 suppress_size_errors = TRUE;
10803 }
10804
10805 list = htab->input_list + htab->top_index;
10806 do
10807 {
10808 asection *tail = *list;
10809 while (tail != NULL)
10810 {
10811 asection *curr;
10812 asection *prev;
10813 bfd_size_type total;
10814 bfd_boolean big_sec;
10815 bfd_vma curr_toc;
10816
10817 curr = tail;
10818 total = tail->size;
10819 big_sec = total > (ppc64_elf_section_data (tail) != NULL
10820 && ppc64_elf_section_data (tail)->has_14bit_branch
10821 ? stub14_group_size : stub_group_size);
10822 if (big_sec && !suppress_size_errors)
10823 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10824 tail->owner, tail);
10825 curr_toc = htab->stub_group[tail->id].toc_off;
10826
10827 while ((prev = PREV_SEC (curr)) != NULL
10828 && ((total += curr->output_offset - prev->output_offset)
10829 < (ppc64_elf_section_data (prev) != NULL
10830 && ppc64_elf_section_data (prev)->has_14bit_branch
10831 ? stub14_group_size : stub_group_size))
10832 && htab->stub_group[prev->id].toc_off == curr_toc)
10833 curr = prev;
10834
10835 /* OK, the size from the start of CURR to the end is less
10836 than stub_group_size and thus can be handled by one stub
10837 section. (or the tail section is itself larger than
10838 stub_group_size, in which case we may be toast.) We
10839 should really be keeping track of the total size of stubs
10840 added here, as stubs contribute to the final output
10841 section size. That's a little tricky, and this way will
10842 only break if stubs added make the total size more than
10843 2^25, ie. for the default stub_group_size, if stubs total
10844 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10845 do
10846 {
10847 prev = PREV_SEC (tail);
10848 /* Set up this stub group. */
10849 htab->stub_group[tail->id].link_sec = curr;
10850 }
10851 while (tail != curr && (tail = prev) != NULL);
10852
10853 /* But wait, there's more! Input sections up to stub_group_size
10854 bytes before the stub section can be handled by it too.
10855 Don't do this if we have a really large section after the
10856 stubs, as adding more stubs increases the chance that
10857 branches may not reach into the stub section. */
10858 if (!stubs_always_before_branch && !big_sec)
10859 {
10860 total = 0;
10861 while (prev != NULL
10862 && ((total += tail->output_offset - prev->output_offset)
10863 < (ppc64_elf_section_data (prev) != NULL
10864 && ppc64_elf_section_data (prev)->has_14bit_branch
10865 ? stub14_group_size : stub_group_size))
10866 && htab->stub_group[prev->id].toc_off == curr_toc)
10867 {
10868 tail = prev;
10869 prev = PREV_SEC (tail);
10870 htab->stub_group[tail->id].link_sec = curr;
10871 }
10872 }
10873 tail = prev;
10874 }
10875 }
10876 while (list-- != htab->input_list);
10877 free (htab->input_list);
10878 #undef PREV_SEC
10879 }
10880
10881 /* Determine and set the size of the stub section for a final link.
10882
10883 The basic idea here is to examine all the relocations looking for
10884 PC-relative calls to a target that is unreachable with a "bl"
10885 instruction. */
10886
10887 bfd_boolean
10888 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size)
10889 {
10890 bfd_size_type stub_group_size;
10891 bfd_boolean stubs_always_before_branch;
10892 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10893
10894 if (htab == NULL)
10895 return FALSE;
10896
10897 stubs_always_before_branch = group_size < 0;
10898 if (group_size < 0)
10899 stub_group_size = -group_size;
10900 else
10901 stub_group_size = group_size;
10902
10903 group_sections (htab, stub_group_size, stubs_always_before_branch);
10904
10905 while (1)
10906 {
10907 bfd *input_bfd;
10908 unsigned int bfd_indx;
10909 asection *stub_sec;
10910
10911 htab->stub_iteration += 1;
10912
10913 for (input_bfd = info->input_bfds, bfd_indx = 0;
10914 input_bfd != NULL;
10915 input_bfd = input_bfd->link_next, bfd_indx++)
10916 {
10917 Elf_Internal_Shdr *symtab_hdr;
10918 asection *section;
10919 Elf_Internal_Sym *local_syms = NULL;
10920
10921 if (!is_ppc64_elf (input_bfd))
10922 continue;
10923
10924 /* We'll need the symbol table in a second. */
10925 symtab_hdr = &elf_symtab_hdr (input_bfd);
10926 if (symtab_hdr->sh_info == 0)
10927 continue;
10928
10929 /* Walk over each section attached to the input bfd. */
10930 for (section = input_bfd->sections;
10931 section != NULL;
10932 section = section->next)
10933 {
10934 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10935
10936 /* If there aren't any relocs, then there's nothing more
10937 to do. */
10938 if ((section->flags & SEC_RELOC) == 0
10939 || (section->flags & SEC_ALLOC) == 0
10940 || (section->flags & SEC_LOAD) == 0
10941 || (section->flags & SEC_CODE) == 0
10942 || section->reloc_count == 0)
10943 continue;
10944
10945 /* If this section is a link-once section that will be
10946 discarded, then don't create any stubs. */
10947 if (section->output_section == NULL
10948 || section->output_section->owner != info->output_bfd)
10949 continue;
10950
10951 /* Get the relocs. */
10952 internal_relocs
10953 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10954 info->keep_memory);
10955 if (internal_relocs == NULL)
10956 goto error_ret_free_local;
10957
10958 /* Now examine each relocation. */
10959 irela = internal_relocs;
10960 irelaend = irela + section->reloc_count;
10961 for (; irela < irelaend; irela++)
10962 {
10963 enum elf_ppc64_reloc_type r_type;
10964 unsigned int r_indx;
10965 enum ppc_stub_type stub_type;
10966 struct ppc_stub_hash_entry *stub_entry;
10967 asection *sym_sec, *code_sec;
10968 bfd_vma sym_value, code_value;
10969 bfd_vma destination;
10970 bfd_boolean ok_dest;
10971 struct ppc_link_hash_entry *hash;
10972 struct ppc_link_hash_entry *fdh;
10973 struct elf_link_hash_entry *h;
10974 Elf_Internal_Sym *sym;
10975 char *stub_name;
10976 const asection *id_sec;
10977 struct _opd_sec_data *opd;
10978 struct plt_entry *plt_ent;
10979
10980 r_type = ELF64_R_TYPE (irela->r_info);
10981 r_indx = ELF64_R_SYM (irela->r_info);
10982
10983 if (r_type >= R_PPC64_max)
10984 {
10985 bfd_set_error (bfd_error_bad_value);
10986 goto error_ret_free_internal;
10987 }
10988
10989 /* Only look for stubs on branch instructions. */
10990 if (r_type != R_PPC64_REL24
10991 && r_type != R_PPC64_REL14
10992 && r_type != R_PPC64_REL14_BRTAKEN
10993 && r_type != R_PPC64_REL14_BRNTAKEN)
10994 continue;
10995
10996 /* Now determine the call target, its name, value,
10997 section. */
10998 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10999 r_indx, input_bfd))
11000 goto error_ret_free_internal;
11001 hash = (struct ppc_link_hash_entry *) h;
11002
11003 ok_dest = FALSE;
11004 fdh = NULL;
11005 sym_value = 0;
11006 if (hash == NULL)
11007 {
11008 sym_value = sym->st_value;
11009 ok_dest = TRUE;
11010 }
11011 else if (hash->elf.root.type == bfd_link_hash_defined
11012 || hash->elf.root.type == bfd_link_hash_defweak)
11013 {
11014 sym_value = hash->elf.root.u.def.value;
11015 if (sym_sec->output_section != NULL)
11016 ok_dest = TRUE;
11017 }
11018 else if (hash->elf.root.type == bfd_link_hash_undefweak
11019 || hash->elf.root.type == bfd_link_hash_undefined)
11020 {
11021 /* Recognise an old ABI func code entry sym, and
11022 use the func descriptor sym instead if it is
11023 defined. */
11024 if (hash->elf.root.root.string[0] == '.'
11025 && (fdh = lookup_fdh (hash, htab)) != NULL)
11026 {
11027 if (fdh->elf.root.type == bfd_link_hash_defined
11028 || fdh->elf.root.type == bfd_link_hash_defweak)
11029 {
11030 sym_sec = fdh->elf.root.u.def.section;
11031 sym_value = fdh->elf.root.u.def.value;
11032 if (sym_sec->output_section != NULL)
11033 ok_dest = TRUE;
11034 }
11035 else
11036 fdh = NULL;
11037 }
11038 }
11039 else
11040 {
11041 bfd_set_error (bfd_error_bad_value);
11042 goto error_ret_free_internal;
11043 }
11044
11045 destination = 0;
11046 if (ok_dest)
11047 {
11048 sym_value += irela->r_addend;
11049 destination = (sym_value
11050 + sym_sec->output_offset
11051 + sym_sec->output_section->vma);
11052 }
11053
11054 code_sec = sym_sec;
11055 code_value = sym_value;
11056 opd = get_opd_info (sym_sec);
11057 if (opd != NULL)
11058 {
11059 bfd_vma dest;
11060
11061 if (hash == NULL && opd->adjust != NULL)
11062 {
11063 long adjust = opd->adjust[sym_value / 8];
11064 if (adjust == -1)
11065 continue;
11066 code_value += adjust;
11067 sym_value += adjust;
11068 }
11069 dest = opd_entry_value (sym_sec, sym_value,
11070 &code_sec, &code_value);
11071 if (dest != (bfd_vma) -1)
11072 {
11073 destination = dest;
11074 if (fdh != NULL)
11075 {
11076 /* Fixup old ABI sym to point at code
11077 entry. */
11078 hash->elf.root.type = bfd_link_hash_defweak;
11079 hash->elf.root.u.def.section = code_sec;
11080 hash->elf.root.u.def.value = code_value;
11081 }
11082 }
11083 }
11084
11085 /* Determine what (if any) linker stub is needed. */
11086 plt_ent = NULL;
11087 stub_type = ppc_type_of_stub (section, irela, &hash,
11088 &plt_ent, destination);
11089
11090 if (stub_type != ppc_stub_plt_call)
11091 {
11092 /* Check whether we need a TOC adjusting stub.
11093 Since the linker pastes together pieces from
11094 different object files when creating the
11095 _init and _fini functions, it may be that a
11096 call to what looks like a local sym is in
11097 fact a call needing a TOC adjustment. */
11098 if (code_sec != NULL
11099 && code_sec->output_section != NULL
11100 && (htab->stub_group[code_sec->id].toc_off
11101 != htab->stub_group[section->id].toc_off)
11102 && (code_sec->has_toc_reloc
11103 || code_sec->makes_toc_func_call))
11104 stub_type = ppc_stub_long_branch_r2off;
11105 }
11106
11107 if (stub_type == ppc_stub_none)
11108 continue;
11109
11110 /* __tls_get_addr calls might be eliminated. */
11111 if (stub_type != ppc_stub_plt_call
11112 && hash != NULL
11113 && (hash == htab->tls_get_addr
11114 || hash == htab->tls_get_addr_fd)
11115 && section->has_tls_reloc
11116 && irela != internal_relocs)
11117 {
11118 /* Get tls info. */
11119 unsigned char *tls_mask;
11120
11121 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11122 irela - 1, input_bfd))
11123 goto error_ret_free_internal;
11124 if (*tls_mask != 0)
11125 continue;
11126 }
11127
11128 /* Support for grouping stub sections. */
11129 id_sec = htab->stub_group[section->id].link_sec;
11130
11131 /* Get the name of this stub. */
11132 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11133 if (!stub_name)
11134 goto error_ret_free_internal;
11135
11136 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11137 stub_name, FALSE, FALSE);
11138 if (stub_entry != NULL)
11139 {
11140 /* The proper stub has already been created. */
11141 free (stub_name);
11142 continue;
11143 }
11144
11145 stub_entry = ppc_add_stub (stub_name, section, htab);
11146 if (stub_entry == NULL)
11147 {
11148 free (stub_name);
11149 error_ret_free_internal:
11150 if (elf_section_data (section)->relocs == NULL)
11151 free (internal_relocs);
11152 error_ret_free_local:
11153 if (local_syms != NULL
11154 && (symtab_hdr->contents
11155 != (unsigned char *) local_syms))
11156 free (local_syms);
11157 return FALSE;
11158 }
11159
11160 stub_entry->stub_type = stub_type;
11161 if (stub_type != ppc_stub_plt_call)
11162 {
11163 stub_entry->target_value = code_value;
11164 stub_entry->target_section = code_sec;
11165 }
11166 else
11167 {
11168 stub_entry->target_value = sym_value;
11169 stub_entry->target_section = sym_sec;
11170 }
11171 stub_entry->h = hash;
11172 stub_entry->plt_ent = plt_ent;
11173 stub_entry->addend = irela->r_addend;
11174
11175 if (stub_entry->h != NULL)
11176 htab->stub_globals += 1;
11177 }
11178
11179 /* We're done with the internal relocs, free them. */
11180 if (elf_section_data (section)->relocs != internal_relocs)
11181 free (internal_relocs);
11182 }
11183
11184 if (local_syms != NULL
11185 && symtab_hdr->contents != (unsigned char *) local_syms)
11186 {
11187 if (!info->keep_memory)
11188 free (local_syms);
11189 else
11190 symtab_hdr->contents = (unsigned char *) local_syms;
11191 }
11192 }
11193
11194 /* We may have added some stubs. Find out the new size of the
11195 stub sections. */
11196 for (stub_sec = htab->stub_bfd->sections;
11197 stub_sec != NULL;
11198 stub_sec = stub_sec->next)
11199 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11200 {
11201 stub_sec->rawsize = stub_sec->size;
11202 stub_sec->size = 0;
11203 stub_sec->reloc_count = 0;
11204 stub_sec->flags &= ~SEC_RELOC;
11205 }
11206
11207 htab->brlt->size = 0;
11208 htab->brlt->reloc_count = 0;
11209 htab->brlt->flags &= ~SEC_RELOC;
11210 if (htab->relbrlt != NULL)
11211 htab->relbrlt->size = 0;
11212
11213 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11214
11215 if (info->emitrelocations
11216 && htab->glink != NULL && htab->glink->size != 0)
11217 {
11218 htab->glink->reloc_count = 1;
11219 htab->glink->flags |= SEC_RELOC;
11220 }
11221
11222 for (stub_sec = htab->stub_bfd->sections;
11223 stub_sec != NULL;
11224 stub_sec = stub_sec->next)
11225 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11226 && stub_sec->rawsize != stub_sec->size)
11227 break;
11228
11229 /* Exit from this loop when no stubs have been added, and no stubs
11230 have changed size. */
11231 if (stub_sec == NULL)
11232 break;
11233
11234 /* Ask the linker to do its stuff. */
11235 (*htab->layout_sections_again) ();
11236 }
11237
11238 /* It would be nice to strip htab->brlt from the output if the
11239 section is empty, but it's too late. If we strip sections here,
11240 the dynamic symbol table is corrupted since the section symbol
11241 for the stripped section isn't written. */
11242
11243 return TRUE;
11244 }
11245
11246 /* Called after we have determined section placement. If sections
11247 move, we'll be called again. Provide a value for TOCstart. */
11248
11249 bfd_vma
11250 ppc64_elf_toc (bfd *obfd)
11251 {
11252 asection *s;
11253 bfd_vma TOCstart;
11254
11255 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11256 order. The TOC starts where the first of these sections starts. */
11257 s = bfd_get_section_by_name (obfd, ".got");
11258 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11259 s = bfd_get_section_by_name (obfd, ".toc");
11260 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11261 s = bfd_get_section_by_name (obfd, ".tocbss");
11262 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11263 s = bfd_get_section_by_name (obfd, ".plt");
11264 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11265 {
11266 /* This may happen for
11267 o references to TOC base (SYM@toc / TOC[tc0]) without a
11268 .toc directive
11269 o bad linker script
11270 o --gc-sections and empty TOC sections
11271
11272 FIXME: Warn user? */
11273
11274 /* Look for a likely section. We probably won't even be
11275 using TOCstart. */
11276 for (s = obfd->sections; s != NULL; s = s->next)
11277 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11278 | SEC_EXCLUDE))
11279 == (SEC_ALLOC | SEC_SMALL_DATA))
11280 break;
11281 if (s == NULL)
11282 for (s = obfd->sections; s != NULL; s = s->next)
11283 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11284 == (SEC_ALLOC | SEC_SMALL_DATA))
11285 break;
11286 if (s == NULL)
11287 for (s = obfd->sections; s != NULL; s = s->next)
11288 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11289 == SEC_ALLOC)
11290 break;
11291 if (s == NULL)
11292 for (s = obfd->sections; s != NULL; s = s->next)
11293 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11294 break;
11295 }
11296
11297 TOCstart = 0;
11298 if (s != NULL)
11299 TOCstart = s->output_section->vma + s->output_offset;
11300
11301 return TOCstart;
11302 }
11303
11304 /* Build all the stubs associated with the current output file.
11305 The stubs are kept in a hash table attached to the main linker
11306 hash table. This function is called via gldelf64ppc_finish. */
11307
11308 bfd_boolean
11309 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11310 struct bfd_link_info *info,
11311 char **stats)
11312 {
11313 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11314 asection *stub_sec;
11315 bfd_byte *p;
11316 int stub_sec_count = 0;
11317
11318 if (htab == NULL)
11319 return FALSE;
11320
11321 htab->emit_stub_syms = emit_stub_syms;
11322
11323 /* Allocate memory to hold the linker stubs. */
11324 for (stub_sec = htab->stub_bfd->sections;
11325 stub_sec != NULL;
11326 stub_sec = stub_sec->next)
11327 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11328 && stub_sec->size != 0)
11329 {
11330 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11331 if (stub_sec->contents == NULL)
11332 return FALSE;
11333 /* We want to check that built size is the same as calculated
11334 size. rawsize is a convenient location to use. */
11335 stub_sec->rawsize = stub_sec->size;
11336 stub_sec->size = 0;
11337 }
11338
11339 if (htab->glink != NULL && htab->glink->size != 0)
11340 {
11341 unsigned int indx;
11342 bfd_vma plt0;
11343
11344 /* Build the .glink plt call stub. */
11345 if (htab->emit_stub_syms)
11346 {
11347 struct elf_link_hash_entry *h;
11348 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11349 TRUE, FALSE, FALSE);
11350 if (h == NULL)
11351 return FALSE;
11352 if (h->root.type == bfd_link_hash_new)
11353 {
11354 h->root.type = bfd_link_hash_defined;
11355 h->root.u.def.section = htab->glink;
11356 h->root.u.def.value = 8;
11357 h->ref_regular = 1;
11358 h->def_regular = 1;
11359 h->ref_regular_nonweak = 1;
11360 h->forced_local = 1;
11361 h->non_elf = 0;
11362 }
11363 }
11364 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11365 if (info->emitrelocations)
11366 {
11367 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11368 if (r == NULL)
11369 return FALSE;
11370 r->r_offset = (htab->glink->output_offset
11371 + htab->glink->output_section->vma);
11372 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11373 r->r_addend = plt0;
11374 }
11375 p = htab->glink->contents;
11376 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11377 bfd_put_64 (htab->glink->owner, plt0, p);
11378 p += 8;
11379 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11380 p += 4;
11381 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11382 p += 4;
11383 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11384 p += 4;
11385 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11386 p += 4;
11387 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11388 p += 4;
11389 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11390 p += 4;
11391 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11392 p += 4;
11393 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11394 p += 4;
11395 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11396 p += 4;
11397 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11398 p += 4;
11399 bfd_put_32 (htab->glink->owner, BCTR, p);
11400 p += 4;
11401 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11402 {
11403 bfd_put_32 (htab->glink->owner, NOP, p);
11404 p += 4;
11405 }
11406
11407 /* Build the .glink lazy link call stubs. */
11408 indx = 0;
11409 while (p < htab->glink->contents + htab->glink->size)
11410 {
11411 if (indx < 0x8000)
11412 {
11413 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11414 p += 4;
11415 }
11416 else
11417 {
11418 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11419 p += 4;
11420 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11421 p += 4;
11422 }
11423 bfd_put_32 (htab->glink->owner,
11424 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11425 indx++;
11426 p += 4;
11427 }
11428 htab->glink->rawsize = p - htab->glink->contents;
11429 }
11430
11431 if (htab->brlt->size != 0)
11432 {
11433 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11434 htab->brlt->size);
11435 if (htab->brlt->contents == NULL)
11436 return FALSE;
11437 }
11438 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11439 {
11440 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11441 htab->relbrlt->size);
11442 if (htab->relbrlt->contents == NULL)
11443 return FALSE;
11444 }
11445
11446 /* Build the stubs as directed by the stub hash table. */
11447 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11448
11449 if (htab->relbrlt != NULL)
11450 htab->relbrlt->reloc_count = 0;
11451
11452 for (stub_sec = htab->stub_bfd->sections;
11453 stub_sec != NULL;
11454 stub_sec = stub_sec->next)
11455 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11456 {
11457 stub_sec_count += 1;
11458 if (stub_sec->rawsize != stub_sec->size)
11459 break;
11460 }
11461
11462 if (stub_sec != NULL
11463 || htab->glink->rawsize != htab->glink->size)
11464 {
11465 htab->stub_error = TRUE;
11466 (*_bfd_error_handler) (_("stubs don't match calculated size"));
11467 }
11468
11469 if (htab->stub_error)
11470 return FALSE;
11471
11472 if (stats != NULL)
11473 {
11474 *stats = bfd_malloc (500);
11475 if (*stats == NULL)
11476 return FALSE;
11477
11478 sprintf (*stats, _("linker stubs in %u group%s\n"
11479 " branch %lu\n"
11480 " toc adjust %lu\n"
11481 " long branch %lu\n"
11482 " long toc adj %lu\n"
11483 " plt call %lu"),
11484 stub_sec_count,
11485 stub_sec_count == 1 ? "" : "s",
11486 htab->stub_count[ppc_stub_long_branch - 1],
11487 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11488 htab->stub_count[ppc_stub_plt_branch - 1],
11489 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11490 htab->stub_count[ppc_stub_plt_call - 1]);
11491 }
11492 return TRUE;
11493 }
11494
11495 /* This function undoes the changes made by add_symbol_adjust. */
11496
11497 static bfd_boolean
11498 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11499 {
11500 struct ppc_link_hash_entry *eh;
11501
11502 if (h->root.type == bfd_link_hash_indirect)
11503 return TRUE;
11504
11505 if (h->root.type == bfd_link_hash_warning)
11506 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11507
11508 eh = (struct ppc_link_hash_entry *) h;
11509 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11510 return TRUE;
11511
11512 eh->elf.root.type = bfd_link_hash_undefined;
11513 return TRUE;
11514 }
11515
11516 void
11517 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11518 {
11519 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11520
11521 if (htab != NULL)
11522 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11523 }
11524
11525 /* What to do when ld finds relocations against symbols defined in
11526 discarded sections. */
11527
11528 static unsigned int
11529 ppc64_elf_action_discarded (asection *sec)
11530 {
11531 if (strcmp (".opd", sec->name) == 0)
11532 return 0;
11533
11534 if (strcmp (".toc", sec->name) == 0)
11535 return 0;
11536
11537 if (strcmp (".toc1", sec->name) == 0)
11538 return 0;
11539
11540 return _bfd_elf_default_action_discarded (sec);
11541 }
11542
11543 /* REL points to a low-part reloc on a largetoc instruction sequence.
11544 Find the matching high-part reloc instruction and verify that it
11545 is addis REG,x,imm. If so, set *REG to x and return a pointer to
11546 the high-part reloc. */
11547
11548 static const Elf_Internal_Rela *
11549 ha_reloc_match (const Elf_Internal_Rela *relocs,
11550 const Elf_Internal_Rela *rel,
11551 unsigned int *reg,
11552 bfd_boolean match_addend,
11553 const bfd *input_bfd,
11554 const bfd_byte *contents)
11555 {
11556 enum elf_ppc64_reloc_type r_type, r_type_ha;
11557 bfd_vma r_info_ha, r_addend;
11558
11559 r_type = ELF64_R_TYPE (rel->r_info);
11560 switch (r_type)
11561 {
11562 case R_PPC64_GOT_TLSLD16_LO:
11563 case R_PPC64_GOT_TLSGD16_LO:
11564 case R_PPC64_GOT_TPREL16_LO_DS:
11565 case R_PPC64_GOT_DTPREL16_LO_DS:
11566 case R_PPC64_GOT16_LO:
11567 case R_PPC64_TOC16_LO:
11568 r_type_ha = r_type + 2;
11569 break;
11570 case R_PPC64_GOT16_LO_DS:
11571 r_type_ha = R_PPC64_GOT16_HA;
11572 break;
11573 case R_PPC64_TOC16_LO_DS:
11574 r_type_ha = R_PPC64_TOC16_HA;
11575 break;
11576 default:
11577 abort ();
11578 }
11579 r_info_ha = ELF64_R_INFO (ELF64_R_SYM (rel->r_info), r_type_ha);
11580 r_addend = rel->r_addend;
11581
11582 while (--rel >= relocs)
11583 if (rel->r_info == r_info_ha
11584 && (!match_addend
11585 || rel->r_addend == r_addend))
11586 {
11587 const bfd_byte *p = contents + (rel->r_offset & ~3);
11588 unsigned int insn = bfd_get_32 (input_bfd, p);
11589 if ((insn & (0x3f << 26)) == (15u << 26) /* addis rt,x,imm */
11590 && (insn & (0x1f << 21)) == (*reg << 21))
11591 {
11592 *reg = (insn >> 16) & 0x1f;
11593 return rel;
11594 }
11595 break;
11596 }
11597 return NULL;
11598 }
11599
11600 /* The RELOCATE_SECTION function is called by the ELF backend linker
11601 to handle the relocations for a section.
11602
11603 The relocs are always passed as Rela structures; if the section
11604 actually uses Rel structures, the r_addend field will always be
11605 zero.
11606
11607 This function is responsible for adjust the section contents as
11608 necessary, and (if using Rela relocs and generating a
11609 relocatable output file) adjusting the reloc addend as
11610 necessary.
11611
11612 This function does not have to worry about setting the reloc
11613 address or the reloc symbol index.
11614
11615 LOCAL_SYMS is a pointer to the swapped in local symbols.
11616
11617 LOCAL_SECTIONS is an array giving the section in the input file
11618 corresponding to the st_shndx field of each local symbol.
11619
11620 The global hash table entry for the global symbols can be found
11621 via elf_sym_hashes (input_bfd).
11622
11623 When generating relocatable output, this function must handle
11624 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11625 going to be the section symbol corresponding to the output
11626 section, which means that the addend must be adjusted
11627 accordingly. */
11628
11629 static bfd_boolean
11630 ppc64_elf_relocate_section (bfd *output_bfd,
11631 struct bfd_link_info *info,
11632 bfd *input_bfd,
11633 asection *input_section,
11634 bfd_byte *contents,
11635 Elf_Internal_Rela *relocs,
11636 Elf_Internal_Sym *local_syms,
11637 asection **local_sections)
11638 {
11639 struct ppc_link_hash_table *htab;
11640 Elf_Internal_Shdr *symtab_hdr;
11641 struct elf_link_hash_entry **sym_hashes;
11642 Elf_Internal_Rela *rel;
11643 Elf_Internal_Rela *relend;
11644 Elf_Internal_Rela outrel;
11645 bfd_byte *loc;
11646 struct got_entry **local_got_ents;
11647 unsigned char *ha_opt;
11648 bfd_vma TOCstart;
11649 bfd_boolean no_ha_opt;
11650 bfd_boolean ret = TRUE;
11651 bfd_boolean is_opd;
11652 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11653 bfd_boolean is_power4 = FALSE;
11654 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11655
11656 /* Initialize howto table if needed. */
11657 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11658 ppc_howto_init ();
11659
11660 htab = ppc_hash_table (info);
11661 if (htab == NULL)
11662 return FALSE;
11663
11664 /* Don't relocate stub sections. */
11665 if (input_section->owner == htab->stub_bfd)
11666 return TRUE;
11667
11668 BFD_ASSERT (is_ppc64_elf (input_bfd));
11669
11670 local_got_ents = elf_local_got_ents (input_bfd);
11671 TOCstart = elf_gp (output_bfd);
11672 symtab_hdr = &elf_symtab_hdr (input_bfd);
11673 sym_hashes = elf_sym_hashes (input_bfd);
11674 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11675 ha_opt = NULL;
11676 no_ha_opt = FALSE;
11677
11678 rel = relocs;
11679 relend = relocs + input_section->reloc_count;
11680 for (; rel < relend; rel++)
11681 {
11682 enum elf_ppc64_reloc_type r_type;
11683 bfd_vma addend, orig_addend;
11684 bfd_reloc_status_type r;
11685 Elf_Internal_Sym *sym;
11686 asection *sec;
11687 struct elf_link_hash_entry *h_elf;
11688 struct ppc_link_hash_entry *h;
11689 struct ppc_link_hash_entry *fdh;
11690 const char *sym_name;
11691 unsigned long r_symndx, toc_symndx;
11692 bfd_vma toc_addend;
11693 unsigned char tls_mask, tls_gd, tls_type;
11694 unsigned char sym_type;
11695 bfd_vma relocation;
11696 bfd_boolean unresolved_reloc;
11697 bfd_boolean warned;
11698 unsigned int insn;
11699 unsigned int mask;
11700 struct ppc_stub_hash_entry *stub_entry;
11701 bfd_vma max_br_offset;
11702 bfd_vma from;
11703
11704 r_type = ELF64_R_TYPE (rel->r_info);
11705 r_symndx = ELF64_R_SYM (rel->r_info);
11706
11707 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11708 symbol of the previous ADDR64 reloc. The symbol gives us the
11709 proper TOC base to use. */
11710 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11711 && rel != relocs
11712 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11713 && is_opd)
11714 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11715
11716 sym = NULL;
11717 sec = NULL;
11718 h_elf = NULL;
11719 sym_name = NULL;
11720 unresolved_reloc = FALSE;
11721 warned = FALSE;
11722 orig_addend = rel->r_addend;
11723
11724 if (r_symndx < symtab_hdr->sh_info)
11725 {
11726 /* It's a local symbol. */
11727 struct _opd_sec_data *opd;
11728
11729 sym = local_syms + r_symndx;
11730 sec = local_sections[r_symndx];
11731 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11732 sym_type = ELF64_ST_TYPE (sym->st_info);
11733 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11734 opd = get_opd_info (sec);
11735 if (opd != NULL && opd->adjust != NULL)
11736 {
11737 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11738 if (adjust == -1)
11739 relocation = 0;
11740 else
11741 {
11742 /* If this is a relocation against the opd section sym
11743 and we have edited .opd, adjust the reloc addend so
11744 that ld -r and ld --emit-relocs output is correct.
11745 If it is a reloc against some other .opd symbol,
11746 then the symbol value will be adjusted later. */
11747 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11748 rel->r_addend += adjust;
11749 else
11750 relocation += adjust;
11751 }
11752 }
11753 }
11754 else
11755 {
11756 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11757 r_symndx, symtab_hdr, sym_hashes,
11758 h_elf, sec, relocation,
11759 unresolved_reloc, warned);
11760 sym_name = h_elf->root.root.string;
11761 sym_type = h_elf->type;
11762 }
11763 h = (struct ppc_link_hash_entry *) h_elf;
11764
11765 if (sec != NULL && elf_discarded_section (sec))
11766 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
11767 rel, relend,
11768 ppc64_elf_howto_table[r_type],
11769 contents);
11770
11771 if (info->relocatable)
11772 continue;
11773
11774 /* TLS optimizations. Replace instruction sequences and relocs
11775 based on information we collected in tls_optimize. We edit
11776 RELOCS so that --emit-relocs will output something sensible
11777 for the final instruction stream. */
11778 tls_mask = 0;
11779 tls_gd = 0;
11780 toc_symndx = 0;
11781 if (h != NULL)
11782 tls_mask = h->tls_mask;
11783 else if (local_got_ents != NULL)
11784 {
11785 struct plt_entry **local_plt = (struct plt_entry **)
11786 (local_got_ents + symtab_hdr->sh_info);
11787 unsigned char *lgot_masks = (unsigned char *)
11788 (local_plt + symtab_hdr->sh_info);
11789 tls_mask = lgot_masks[r_symndx];
11790 }
11791 if (tls_mask == 0
11792 && (r_type == R_PPC64_TLS
11793 || r_type == R_PPC64_TLSGD
11794 || r_type == R_PPC64_TLSLD))
11795 {
11796 /* Check for toc tls entries. */
11797 unsigned char *toc_tls;
11798
11799 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11800 &local_syms, rel, input_bfd))
11801 return FALSE;
11802
11803 if (toc_tls)
11804 tls_mask = *toc_tls;
11805 }
11806
11807 /* Check that tls relocs are used with tls syms, and non-tls
11808 relocs are used with non-tls syms. */
11809 if (r_symndx != STN_UNDEF
11810 && r_type != R_PPC64_NONE
11811 && (h == NULL
11812 || h->elf.root.type == bfd_link_hash_defined
11813 || h->elf.root.type == bfd_link_hash_defweak)
11814 && (IS_PPC64_TLS_RELOC (r_type)
11815 != (sym_type == STT_TLS
11816 || (sym_type == STT_SECTION
11817 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11818 {
11819 if (tls_mask != 0
11820 && (r_type == R_PPC64_TLS
11821 || r_type == R_PPC64_TLSGD
11822 || r_type == R_PPC64_TLSLD))
11823 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11824 ;
11825 else
11826 (*_bfd_error_handler)
11827 (!IS_PPC64_TLS_RELOC (r_type)
11828 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11829 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
11830 input_bfd,
11831 input_section,
11832 (long) rel->r_offset,
11833 ppc64_elf_howto_table[r_type]->name,
11834 sym_name);
11835 }
11836
11837 /* Ensure reloc mapping code below stays sane. */
11838 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11839 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11840 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11841 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11842 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11843 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11844 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11845 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11846 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11847 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11848 abort ();
11849
11850 switch (r_type)
11851 {
11852 default:
11853 break;
11854
11855 case R_PPC64_LO_DS_OPT:
11856 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11857 if ((insn & (0x3f << 26)) != 58u << 26)
11858 abort ();
11859 insn += (14u << 26) - (58u << 26);
11860 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11861 r_type = R_PPC64_TOC16_LO;
11862 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11863 break;
11864
11865 case R_PPC64_TOC16:
11866 case R_PPC64_TOC16_LO:
11867 case R_PPC64_TOC16_DS:
11868 case R_PPC64_TOC16_LO_DS:
11869 {
11870 /* Check for toc tls entries. */
11871 unsigned char *toc_tls;
11872 int retval;
11873
11874 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11875 &local_syms, rel, input_bfd);
11876 if (retval == 0)
11877 return FALSE;
11878
11879 if (toc_tls)
11880 {
11881 tls_mask = *toc_tls;
11882 if (r_type == R_PPC64_TOC16_DS
11883 || r_type == R_PPC64_TOC16_LO_DS)
11884 {
11885 if (tls_mask != 0
11886 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
11887 goto toctprel;
11888 }
11889 else
11890 {
11891 /* If we found a GD reloc pair, then we might be
11892 doing a GD->IE transition. */
11893 if (retval == 2)
11894 {
11895 tls_gd = TLS_TPRELGD;
11896 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11897 goto tls_ldgd_opt;
11898 }
11899 else if (retval == 3)
11900 {
11901 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11902 goto tls_ldgd_opt;
11903 }
11904 }
11905 }
11906 }
11907 break;
11908
11909 case R_PPC64_GOT_TPREL16_HI:
11910 case R_PPC64_GOT_TPREL16_HA:
11911 if (tls_mask != 0
11912 && (tls_mask & TLS_TPREL) == 0)
11913 {
11914 rel->r_offset -= d_offset;
11915 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11916 r_type = R_PPC64_NONE;
11917 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11918 }
11919 break;
11920
11921 case R_PPC64_GOT_TPREL16_DS:
11922 case R_PPC64_GOT_TPREL16_LO_DS:
11923 if (tls_mask != 0
11924 && (tls_mask & TLS_TPREL) == 0)
11925 {
11926 toctprel:
11927 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11928 insn &= 31 << 21;
11929 insn |= 0x3c0d0000; /* addis 0,13,0 */
11930 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11931 r_type = R_PPC64_TPREL16_HA;
11932 if (toc_symndx != 0)
11933 {
11934 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11935 rel->r_addend = toc_addend;
11936 /* We changed the symbol. Start over in order to
11937 get h, sym, sec etc. right. */
11938 rel--;
11939 continue;
11940 }
11941 else
11942 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11943 }
11944 break;
11945
11946 case R_PPC64_TLS:
11947 if (tls_mask != 0
11948 && (tls_mask & TLS_TPREL) == 0)
11949 {
11950 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11951 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11952 if (insn == 0)
11953 abort ();
11954 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11955 /* Was PPC64_TLS which sits on insn boundary, now
11956 PPC64_TPREL16_LO which is at low-order half-word. */
11957 rel->r_offset += d_offset;
11958 r_type = R_PPC64_TPREL16_LO;
11959 if (toc_symndx != 0)
11960 {
11961 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11962 rel->r_addend = toc_addend;
11963 /* We changed the symbol. Start over in order to
11964 get h, sym, sec etc. right. */
11965 rel--;
11966 continue;
11967 }
11968 else
11969 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11970 }
11971 break;
11972
11973 case R_PPC64_GOT_TLSGD16_HI:
11974 case R_PPC64_GOT_TLSGD16_HA:
11975 tls_gd = TLS_TPRELGD;
11976 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11977 goto tls_gdld_hi;
11978 break;
11979
11980 case R_PPC64_GOT_TLSLD16_HI:
11981 case R_PPC64_GOT_TLSLD16_HA:
11982 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11983 {
11984 tls_gdld_hi:
11985 if ((tls_mask & tls_gd) != 0)
11986 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11987 + R_PPC64_GOT_TPREL16_DS);
11988 else
11989 {
11990 rel->r_offset -= d_offset;
11991 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11992 r_type = R_PPC64_NONE;
11993 }
11994 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11995 }
11996 break;
11997
11998 case R_PPC64_GOT_TLSGD16:
11999 case R_PPC64_GOT_TLSGD16_LO:
12000 tls_gd = TLS_TPRELGD;
12001 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12002 goto tls_ldgd_opt;
12003 break;
12004
12005 case R_PPC64_GOT_TLSLD16:
12006 case R_PPC64_GOT_TLSLD16_LO:
12007 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12008 {
12009 unsigned int insn1, insn2, insn3;
12010 bfd_vma offset;
12011
12012 tls_ldgd_opt:
12013 offset = (bfd_vma) -1;
12014 /* If not using the newer R_PPC64_TLSGD/LD to mark
12015 __tls_get_addr calls, we must trust that the call
12016 stays with its arg setup insns, ie. that the next
12017 reloc is the __tls_get_addr call associated with
12018 the current reloc. Edit both insns. */
12019 if (input_section->has_tls_get_addr_call
12020 && rel + 1 < relend
12021 && branch_reloc_hash_match (input_bfd, rel + 1,
12022 htab->tls_get_addr,
12023 htab->tls_get_addr_fd))
12024 offset = rel[1].r_offset;
12025 if ((tls_mask & tls_gd) != 0)
12026 {
12027 /* IE */
12028 insn1 = bfd_get_32 (output_bfd,
12029 contents + rel->r_offset - d_offset);
12030 insn1 &= (1 << 26) - (1 << 2);
12031 insn1 |= 58 << 26; /* ld */
12032 insn2 = 0x7c636a14; /* add 3,3,13 */
12033 if (offset != (bfd_vma) -1)
12034 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12035 if ((tls_mask & TLS_EXPLICIT) == 0)
12036 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12037 + R_PPC64_GOT_TPREL16_DS);
12038 else
12039 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12040 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12041 }
12042 else
12043 {
12044 /* LE */
12045 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12046 insn2 = 0x38630000; /* addi 3,3,0 */
12047 if (tls_gd == 0)
12048 {
12049 /* Was an LD reloc. */
12050 if (toc_symndx)
12051 sec = local_sections[toc_symndx];
12052 for (r_symndx = 0;
12053 r_symndx < symtab_hdr->sh_info;
12054 r_symndx++)
12055 if (local_sections[r_symndx] == sec)
12056 break;
12057 if (r_symndx >= symtab_hdr->sh_info)
12058 r_symndx = STN_UNDEF;
12059 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12060 if (r_symndx != STN_UNDEF)
12061 rel->r_addend -= (local_syms[r_symndx].st_value
12062 + sec->output_offset
12063 + sec->output_section->vma);
12064 }
12065 else if (toc_symndx != 0)
12066 {
12067 r_symndx = toc_symndx;
12068 rel->r_addend = toc_addend;
12069 }
12070 r_type = R_PPC64_TPREL16_HA;
12071 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12072 if (offset != (bfd_vma) -1)
12073 {
12074 rel[1].r_info = ELF64_R_INFO (r_symndx,
12075 R_PPC64_TPREL16_LO);
12076 rel[1].r_offset = offset + d_offset;
12077 rel[1].r_addend = rel->r_addend;
12078 }
12079 }
12080 bfd_put_32 (output_bfd, insn1,
12081 contents + rel->r_offset - d_offset);
12082 if (offset != (bfd_vma) -1)
12083 {
12084 insn3 = bfd_get_32 (output_bfd,
12085 contents + offset + 4);
12086 if (insn3 == NOP
12087 || insn3 == CROR_151515 || insn3 == CROR_313131)
12088 {
12089 rel[1].r_offset += 4;
12090 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12091 insn2 = NOP;
12092 }
12093 bfd_put_32 (output_bfd, insn2, contents + offset);
12094 }
12095 if ((tls_mask & tls_gd) == 0
12096 && (tls_gd == 0 || toc_symndx != 0))
12097 {
12098 /* We changed the symbol. Start over in order
12099 to get h, sym, sec etc. right. */
12100 rel--;
12101 continue;
12102 }
12103 }
12104 break;
12105
12106 case R_PPC64_TLSGD:
12107 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12108 {
12109 unsigned int insn2, insn3;
12110 bfd_vma offset = rel->r_offset;
12111
12112 if ((tls_mask & TLS_TPRELGD) != 0)
12113 {
12114 /* IE */
12115 r_type = R_PPC64_NONE;
12116 insn2 = 0x7c636a14; /* add 3,3,13 */
12117 }
12118 else
12119 {
12120 /* LE */
12121 if (toc_symndx != 0)
12122 {
12123 r_symndx = toc_symndx;
12124 rel->r_addend = toc_addend;
12125 }
12126 r_type = R_PPC64_TPREL16_LO;
12127 rel->r_offset = offset + d_offset;
12128 insn2 = 0x38630000; /* addi 3,3,0 */
12129 }
12130 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12131 /* Zap the reloc on the _tls_get_addr call too. */
12132 BFD_ASSERT (offset == rel[1].r_offset);
12133 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12134 insn3 = bfd_get_32 (output_bfd,
12135 contents + offset + 4);
12136 if (insn3 == NOP
12137 || insn3 == CROR_151515 || insn3 == CROR_313131)
12138 {
12139 rel->r_offset += 4;
12140 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12141 insn2 = NOP;
12142 }
12143 bfd_put_32 (output_bfd, insn2, contents + offset);
12144 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12145 {
12146 rel--;
12147 continue;
12148 }
12149 }
12150 break;
12151
12152 case R_PPC64_TLSLD:
12153 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12154 {
12155 unsigned int insn2, insn3;
12156 bfd_vma offset = rel->r_offset;
12157
12158 if (toc_symndx)
12159 sec = local_sections[toc_symndx];
12160 for (r_symndx = 0;
12161 r_symndx < symtab_hdr->sh_info;
12162 r_symndx++)
12163 if (local_sections[r_symndx] == sec)
12164 break;
12165 if (r_symndx >= symtab_hdr->sh_info)
12166 r_symndx = STN_UNDEF;
12167 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12168 if (r_symndx != STN_UNDEF)
12169 rel->r_addend -= (local_syms[r_symndx].st_value
12170 + sec->output_offset
12171 + sec->output_section->vma);
12172
12173 r_type = R_PPC64_TPREL16_LO;
12174 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12175 rel->r_offset = offset + d_offset;
12176 /* Zap the reloc on the _tls_get_addr call too. */
12177 BFD_ASSERT (offset == rel[1].r_offset);
12178 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12179 insn2 = 0x38630000; /* addi 3,3,0 */
12180 insn3 = bfd_get_32 (output_bfd,
12181 contents + offset + 4);
12182 if (insn3 == NOP
12183 || insn3 == CROR_151515 || insn3 == CROR_313131)
12184 {
12185 rel->r_offset += 4;
12186 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12187 insn2 = NOP;
12188 }
12189 bfd_put_32 (output_bfd, insn2, contents + offset);
12190 rel--;
12191 continue;
12192 }
12193 break;
12194
12195 case R_PPC64_DTPMOD64:
12196 if (rel + 1 < relend
12197 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12198 && rel[1].r_offset == rel->r_offset + 8)
12199 {
12200 if ((tls_mask & TLS_GD) == 0)
12201 {
12202 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12203 if ((tls_mask & TLS_TPRELGD) != 0)
12204 r_type = R_PPC64_TPREL64;
12205 else
12206 {
12207 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12208 r_type = R_PPC64_NONE;
12209 }
12210 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12211 }
12212 }
12213 else
12214 {
12215 if ((tls_mask & TLS_LD) == 0)
12216 {
12217 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12218 r_type = R_PPC64_NONE;
12219 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12220 }
12221 }
12222 break;
12223
12224 case R_PPC64_TPREL64:
12225 if ((tls_mask & TLS_TPREL) == 0)
12226 {
12227 r_type = R_PPC64_NONE;
12228 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12229 }
12230 break;
12231 }
12232
12233 /* Handle other relocations that tweak non-addend part of insn. */
12234 insn = 0;
12235 max_br_offset = 1 << 25;
12236 addend = rel->r_addend;
12237 switch (r_type)
12238 {
12239 default:
12240 break;
12241
12242 /* Branch taken prediction relocations. */
12243 case R_PPC64_ADDR14_BRTAKEN:
12244 case R_PPC64_REL14_BRTAKEN:
12245 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12246 /* Fall thru. */
12247
12248 /* Branch not taken prediction relocations. */
12249 case R_PPC64_ADDR14_BRNTAKEN:
12250 case R_PPC64_REL14_BRNTAKEN:
12251 insn |= bfd_get_32 (output_bfd,
12252 contents + rel->r_offset) & ~(0x01 << 21);
12253 /* Fall thru. */
12254
12255 case R_PPC64_REL14:
12256 max_br_offset = 1 << 15;
12257 /* Fall thru. */
12258
12259 case R_PPC64_REL24:
12260 /* Calls to functions with a different TOC, such as calls to
12261 shared objects, need to alter the TOC pointer. This is
12262 done using a linkage stub. A REL24 branching to these
12263 linkage stubs needs to be followed by a nop, as the nop
12264 will be replaced with an instruction to restore the TOC
12265 base pointer. */
12266 fdh = h;
12267 if (h != NULL
12268 && h->oh != NULL
12269 && h->oh->is_func_descriptor)
12270 fdh = ppc_follow_link (h->oh);
12271 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12272 if (stub_entry != NULL
12273 && (stub_entry->stub_type == ppc_stub_plt_call
12274 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12275 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12276 {
12277 bfd_boolean can_plt_call = FALSE;
12278
12279 if (rel->r_offset + 8 <= input_section->size)
12280 {
12281 unsigned long nop;
12282 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12283 if (nop == NOP
12284 || nop == CROR_151515 || nop == CROR_313131)
12285 {
12286 if (h != NULL
12287 && (h == htab->tls_get_addr_fd
12288 || h == htab->tls_get_addr)
12289 && !htab->no_tls_get_addr_opt)
12290 {
12291 /* Special stub used, leave nop alone. */
12292 }
12293 else
12294 bfd_put_32 (input_bfd, LD_R2_40R1,
12295 contents + rel->r_offset + 4);
12296 can_plt_call = TRUE;
12297 }
12298 }
12299
12300 if (!can_plt_call)
12301 {
12302 if (stub_entry->stub_type == ppc_stub_plt_call)
12303 {
12304 /* If this is a plain branch rather than a branch
12305 and link, don't require a nop. However, don't
12306 allow tail calls in a shared library as they
12307 will result in r2 being corrupted. */
12308 unsigned long br;
12309 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12310 if (info->executable && (br & 1) == 0)
12311 can_plt_call = TRUE;
12312 else
12313 stub_entry = NULL;
12314 }
12315 else if (h != NULL
12316 && strcmp (h->elf.root.root.string,
12317 ".__libc_start_main") == 0)
12318 {
12319 /* Allow crt1 branch to go via a toc adjusting stub. */
12320 can_plt_call = TRUE;
12321 }
12322 else
12323 {
12324 if (strcmp (input_section->output_section->name,
12325 ".init") == 0
12326 || strcmp (input_section->output_section->name,
12327 ".fini") == 0)
12328 (*_bfd_error_handler)
12329 (_("%B(%A+0x%lx): automatic multiple TOCs "
12330 "not supported using your crt files; "
12331 "recompile with -mminimal-toc or upgrade gcc"),
12332 input_bfd,
12333 input_section,
12334 (long) rel->r_offset);
12335 else
12336 (*_bfd_error_handler)
12337 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
12338 "does not allow automatic multiple TOCs; "
12339 "recompile with -mminimal-toc or "
12340 "-fno-optimize-sibling-calls, "
12341 "or make `%s' extern"),
12342 input_bfd,
12343 input_section,
12344 (long) rel->r_offset,
12345 sym_name,
12346 sym_name);
12347 bfd_set_error (bfd_error_bad_value);
12348 ret = FALSE;
12349 }
12350 }
12351
12352 if (can_plt_call
12353 && stub_entry->stub_type == ppc_stub_plt_call)
12354 unresolved_reloc = FALSE;
12355 }
12356
12357 if ((stub_entry == NULL
12358 || stub_entry->stub_type == ppc_stub_long_branch
12359 || stub_entry->stub_type == ppc_stub_plt_branch)
12360 && get_opd_info (sec) != NULL)
12361 {
12362 /* The branch destination is the value of the opd entry. */
12363 bfd_vma off = (relocation + addend
12364 - sec->output_section->vma
12365 - sec->output_offset);
12366 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12367 if (dest != (bfd_vma) -1)
12368 {
12369 relocation = dest;
12370 addend = 0;
12371 }
12372 }
12373
12374 /* If the branch is out of reach we ought to have a long
12375 branch stub. */
12376 from = (rel->r_offset
12377 + input_section->output_offset
12378 + input_section->output_section->vma);
12379
12380 if (stub_entry != NULL
12381 && (stub_entry->stub_type == ppc_stub_long_branch
12382 || stub_entry->stub_type == ppc_stub_plt_branch)
12383 && (r_type == R_PPC64_ADDR14_BRTAKEN
12384 || r_type == R_PPC64_ADDR14_BRNTAKEN
12385 || (relocation + addend - from + max_br_offset
12386 < 2 * max_br_offset)))
12387 /* Don't use the stub if this branch is in range. */
12388 stub_entry = NULL;
12389
12390 if (stub_entry != NULL)
12391 {
12392 /* Munge up the value and addend so that we call the stub
12393 rather than the procedure directly. */
12394 relocation = (stub_entry->stub_offset
12395 + stub_entry->stub_sec->output_offset
12396 + stub_entry->stub_sec->output_section->vma);
12397 addend = 0;
12398 }
12399
12400 if (insn != 0)
12401 {
12402 if (is_power4)
12403 {
12404 /* Set 'a' bit. This is 0b00010 in BO field for branch
12405 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12406 for branch on CTR insns (BO == 1a00t or 1a01t). */
12407 if ((insn & (0x14 << 21)) == (0x04 << 21))
12408 insn |= 0x02 << 21;
12409 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12410 insn |= 0x08 << 21;
12411 else
12412 break;
12413 }
12414 else
12415 {
12416 /* Invert 'y' bit if not the default. */
12417 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12418 insn ^= 0x01 << 21;
12419 }
12420
12421 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12422 }
12423
12424 /* NOP out calls to undefined weak functions.
12425 We can thus call a weak function without first
12426 checking whether the function is defined. */
12427 else if (h != NULL
12428 && h->elf.root.type == bfd_link_hash_undefweak
12429 && h->elf.dynindx == -1
12430 && r_type == R_PPC64_REL24
12431 && relocation == 0
12432 && addend == 0)
12433 {
12434 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12435 continue;
12436 }
12437 break;
12438 }
12439
12440 /* Set `addend'. */
12441 tls_type = 0;
12442 switch (r_type)
12443 {
12444 default:
12445 (*_bfd_error_handler)
12446 (_("%B: unknown relocation type %d for symbol %s"),
12447 input_bfd, (int) r_type, sym_name);
12448
12449 bfd_set_error (bfd_error_bad_value);
12450 ret = FALSE;
12451 continue;
12452
12453 case R_PPC64_NONE:
12454 case R_PPC64_TLS:
12455 case R_PPC64_TLSGD:
12456 case R_PPC64_TLSLD:
12457 case R_PPC64_GNU_VTINHERIT:
12458 case R_PPC64_GNU_VTENTRY:
12459 continue;
12460
12461 /* GOT16 relocations. Like an ADDR16 using the symbol's
12462 address in the GOT as relocation value instead of the
12463 symbol's value itself. Also, create a GOT entry for the
12464 symbol and put the symbol value there. */
12465 case R_PPC64_GOT_TLSGD16:
12466 case R_PPC64_GOT_TLSGD16_LO:
12467 case R_PPC64_GOT_TLSGD16_HI:
12468 case R_PPC64_GOT_TLSGD16_HA:
12469 tls_type = TLS_TLS | TLS_GD;
12470 goto dogot;
12471
12472 case R_PPC64_GOT_TLSLD16:
12473 case R_PPC64_GOT_TLSLD16_LO:
12474 case R_PPC64_GOT_TLSLD16_HI:
12475 case R_PPC64_GOT_TLSLD16_HA:
12476 tls_type = TLS_TLS | TLS_LD;
12477 goto dogot;
12478
12479 case R_PPC64_GOT_TPREL16_DS:
12480 case R_PPC64_GOT_TPREL16_LO_DS:
12481 case R_PPC64_GOT_TPREL16_HI:
12482 case R_PPC64_GOT_TPREL16_HA:
12483 tls_type = TLS_TLS | TLS_TPREL;
12484 goto dogot;
12485
12486 case R_PPC64_GOT_DTPREL16_DS:
12487 case R_PPC64_GOT_DTPREL16_LO_DS:
12488 case R_PPC64_GOT_DTPREL16_HI:
12489 case R_PPC64_GOT_DTPREL16_HA:
12490 tls_type = TLS_TLS | TLS_DTPREL;
12491 goto dogot;
12492
12493 case R_PPC64_GOT16:
12494 case R_PPC64_GOT16_LO:
12495 case R_PPC64_GOT16_HI:
12496 case R_PPC64_GOT16_HA:
12497 case R_PPC64_GOT16_DS:
12498 case R_PPC64_GOT16_LO_DS:
12499 dogot:
12500 {
12501 /* Relocation is to the entry for this symbol in the global
12502 offset table. */
12503 asection *got;
12504 bfd_vma *offp;
12505 bfd_vma off;
12506 unsigned long indx = 0;
12507 struct got_entry *ent;
12508
12509 if (tls_type == (TLS_TLS | TLS_LD)
12510 && (h == NULL
12511 || !h->elf.def_dynamic))
12512 ent = ppc64_tlsld_got (input_bfd);
12513 else
12514 {
12515
12516 if (h != NULL)
12517 {
12518 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12519 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12520 &h->elf)
12521 || (info->shared
12522 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
12523 /* This is actually a static link, or it is a
12524 -Bsymbolic link and the symbol is defined
12525 locally, or the symbol was forced to be local
12526 because of a version file. */
12527 ;
12528 else
12529 {
12530 indx = h->elf.dynindx;
12531 unresolved_reloc = FALSE;
12532 }
12533 ent = h->elf.got.glist;
12534 }
12535 else
12536 {
12537 if (local_got_ents == NULL)
12538 abort ();
12539 ent = local_got_ents[r_symndx];
12540 }
12541
12542 for (; ent != NULL; ent = ent->next)
12543 if (ent->addend == orig_addend
12544 && ent->owner == input_bfd
12545 && ent->tls_type == tls_type)
12546 break;
12547 }
12548
12549 if (ent == NULL)
12550 abort ();
12551 if (ent->is_indirect)
12552 ent = ent->got.ent;
12553 offp = &ent->got.offset;
12554 got = ppc64_elf_tdata (ent->owner)->got;
12555 if (got == NULL)
12556 abort ();
12557
12558 /* The offset must always be a multiple of 8. We use the
12559 least significant bit to record whether we have already
12560 processed this entry. */
12561 off = *offp;
12562 if ((off & 1) != 0)
12563 off &= ~1;
12564 else
12565 {
12566 /* Generate relocs for the dynamic linker, except in
12567 the case of TLSLD where we'll use one entry per
12568 module. */
12569 asection *relgot;
12570 bfd_boolean ifunc;
12571
12572 *offp = off | 1;
12573 relgot = NULL;
12574 ifunc = (h != NULL
12575 ? h->elf.type == STT_GNU_IFUNC
12576 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12577 if ((info->shared || indx != 0)
12578 && (h == NULL
12579 || (tls_type == (TLS_TLS | TLS_LD)
12580 && !h->elf.def_dynamic)
12581 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12582 || h->elf.root.type != bfd_link_hash_undefweak))
12583 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12584 else if (ifunc)
12585 relgot = htab->reliplt;
12586 if (relgot != NULL)
12587 {
12588 outrel.r_offset = (got->output_section->vma
12589 + got->output_offset
12590 + off);
12591 outrel.r_addend = addend;
12592 if (tls_type & (TLS_LD | TLS_GD))
12593 {
12594 outrel.r_addend = 0;
12595 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12596 if (tls_type == (TLS_TLS | TLS_GD))
12597 {
12598 loc = relgot->contents;
12599 loc += (relgot->reloc_count++
12600 * sizeof (Elf64_External_Rela));
12601 bfd_elf64_swap_reloca_out (output_bfd,
12602 &outrel, loc);
12603 outrel.r_offset += 8;
12604 outrel.r_addend = addend;
12605 outrel.r_info
12606 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12607 }
12608 }
12609 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12610 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12611 else if (tls_type == (TLS_TLS | TLS_TPREL))
12612 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12613 else if (indx != 0)
12614 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12615 else
12616 {
12617 if (ifunc)
12618 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12619 else
12620 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12621
12622 /* Write the .got section contents for the sake
12623 of prelink. */
12624 loc = got->contents + off;
12625 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12626 loc);
12627 }
12628
12629 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12630 {
12631 outrel.r_addend += relocation;
12632 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12633 outrel.r_addend -= htab->elf.tls_sec->vma;
12634 }
12635 loc = relgot->contents;
12636 loc += (relgot->reloc_count++
12637 * sizeof (Elf64_External_Rela));
12638 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12639 }
12640
12641 /* Init the .got section contents here if we're not
12642 emitting a reloc. */
12643 else
12644 {
12645 relocation += addend;
12646 if (tls_type == (TLS_TLS | TLS_LD))
12647 relocation = 1;
12648 else if (tls_type != 0)
12649 {
12650 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12651 if (tls_type == (TLS_TLS | TLS_TPREL))
12652 relocation += DTP_OFFSET - TP_OFFSET;
12653
12654 if (tls_type == (TLS_TLS | TLS_GD))
12655 {
12656 bfd_put_64 (output_bfd, relocation,
12657 got->contents + off + 8);
12658 relocation = 1;
12659 }
12660 }
12661
12662 bfd_put_64 (output_bfd, relocation,
12663 got->contents + off);
12664 }
12665 }
12666
12667 if (off >= (bfd_vma) -2)
12668 abort ();
12669
12670 relocation = got->output_section->vma + got->output_offset + off;
12671 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12672 }
12673 break;
12674
12675 case R_PPC64_PLT16_HA:
12676 case R_PPC64_PLT16_HI:
12677 case R_PPC64_PLT16_LO:
12678 case R_PPC64_PLT32:
12679 case R_PPC64_PLT64:
12680 /* Relocation is to the entry for this symbol in the
12681 procedure linkage table. */
12682
12683 /* Resolve a PLT reloc against a local symbol directly,
12684 without using the procedure linkage table. */
12685 if (h == NULL)
12686 break;
12687
12688 /* It's possible that we didn't make a PLT entry for this
12689 symbol. This happens when statically linking PIC code,
12690 or when using -Bsymbolic. Go find a match if there is a
12691 PLT entry. */
12692 if (htab->plt != NULL)
12693 {
12694 struct plt_entry *ent;
12695 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12696 if (ent->addend == orig_addend
12697 && ent->plt.offset != (bfd_vma) -1)
12698 {
12699 relocation = (htab->plt->output_section->vma
12700 + htab->plt->output_offset
12701 + ent->plt.offset);
12702 unresolved_reloc = FALSE;
12703 }
12704 }
12705 break;
12706
12707 case R_PPC64_TOC:
12708 /* Relocation value is TOC base. */
12709 relocation = TOCstart;
12710 if (r_symndx == STN_UNDEF)
12711 relocation += htab->stub_group[input_section->id].toc_off;
12712 else if (unresolved_reloc)
12713 ;
12714 else if (sec != NULL && sec->id <= htab->top_id)
12715 relocation += htab->stub_group[sec->id].toc_off;
12716 else
12717 unresolved_reloc = TRUE;
12718 goto dodyn;
12719
12720 /* TOC16 relocs. We want the offset relative to the TOC base,
12721 which is the address of the start of the TOC plus 0x8000.
12722 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12723 in this order. */
12724 case R_PPC64_TOC16:
12725 case R_PPC64_TOC16_LO:
12726 case R_PPC64_TOC16_HI:
12727 case R_PPC64_TOC16_DS:
12728 case R_PPC64_TOC16_LO_DS:
12729 case R_PPC64_TOC16_HA:
12730 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12731 break;
12732
12733 /* Relocate against the beginning of the section. */
12734 case R_PPC64_SECTOFF:
12735 case R_PPC64_SECTOFF_LO:
12736 case R_PPC64_SECTOFF_HI:
12737 case R_PPC64_SECTOFF_DS:
12738 case R_PPC64_SECTOFF_LO_DS:
12739 case R_PPC64_SECTOFF_HA:
12740 if (sec != NULL)
12741 addend -= sec->output_section->vma;
12742 break;
12743
12744 case R_PPC64_REL16:
12745 case R_PPC64_REL16_LO:
12746 case R_PPC64_REL16_HI:
12747 case R_PPC64_REL16_HA:
12748 break;
12749
12750 case R_PPC64_REL14:
12751 case R_PPC64_REL14_BRNTAKEN:
12752 case R_PPC64_REL14_BRTAKEN:
12753 case R_PPC64_REL24:
12754 break;
12755
12756 case R_PPC64_TPREL16:
12757 case R_PPC64_TPREL16_LO:
12758 case R_PPC64_TPREL16_HI:
12759 case R_PPC64_TPREL16_HA:
12760 case R_PPC64_TPREL16_DS:
12761 case R_PPC64_TPREL16_LO_DS:
12762 case R_PPC64_TPREL16_HIGHER:
12763 case R_PPC64_TPREL16_HIGHERA:
12764 case R_PPC64_TPREL16_HIGHEST:
12765 case R_PPC64_TPREL16_HIGHESTA:
12766 if (h != NULL
12767 && h->elf.root.type == bfd_link_hash_undefweak
12768 && h->elf.dynindx == -1)
12769 {
12770 /* Make this relocation against an undefined weak symbol
12771 resolve to zero. This is really just a tweak, since
12772 code using weak externs ought to check that they are
12773 defined before using them. */
12774 bfd_byte *p = contents + rel->r_offset - d_offset;
12775
12776 insn = bfd_get_32 (output_bfd, p);
12777 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12778 if (insn != 0)
12779 bfd_put_32 (output_bfd, insn, p);
12780 break;
12781 }
12782 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12783 if (info->shared)
12784 /* The TPREL16 relocs shouldn't really be used in shared
12785 libs as they will result in DT_TEXTREL being set, but
12786 support them anyway. */
12787 goto dodyn;
12788 break;
12789
12790 case R_PPC64_DTPREL16:
12791 case R_PPC64_DTPREL16_LO:
12792 case R_PPC64_DTPREL16_HI:
12793 case R_PPC64_DTPREL16_HA:
12794 case R_PPC64_DTPREL16_DS:
12795 case R_PPC64_DTPREL16_LO_DS:
12796 case R_PPC64_DTPREL16_HIGHER:
12797 case R_PPC64_DTPREL16_HIGHERA:
12798 case R_PPC64_DTPREL16_HIGHEST:
12799 case R_PPC64_DTPREL16_HIGHESTA:
12800 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12801 break;
12802
12803 case R_PPC64_DTPMOD64:
12804 relocation = 1;
12805 addend = 0;
12806 goto dodyn;
12807
12808 case R_PPC64_TPREL64:
12809 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12810 goto dodyn;
12811
12812 case R_PPC64_DTPREL64:
12813 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12814 /* Fall thru */
12815
12816 /* Relocations that may need to be propagated if this is a
12817 dynamic object. */
12818 case R_PPC64_REL30:
12819 case R_PPC64_REL32:
12820 case R_PPC64_REL64:
12821 case R_PPC64_ADDR14:
12822 case R_PPC64_ADDR14_BRNTAKEN:
12823 case R_PPC64_ADDR14_BRTAKEN:
12824 case R_PPC64_ADDR16:
12825 case R_PPC64_ADDR16_DS:
12826 case R_PPC64_ADDR16_HA:
12827 case R_PPC64_ADDR16_HI:
12828 case R_PPC64_ADDR16_HIGHER:
12829 case R_PPC64_ADDR16_HIGHERA:
12830 case R_PPC64_ADDR16_HIGHEST:
12831 case R_PPC64_ADDR16_HIGHESTA:
12832 case R_PPC64_ADDR16_LO:
12833 case R_PPC64_ADDR16_LO_DS:
12834 case R_PPC64_ADDR24:
12835 case R_PPC64_ADDR32:
12836 case R_PPC64_ADDR64:
12837 case R_PPC64_UADDR16:
12838 case R_PPC64_UADDR32:
12839 case R_PPC64_UADDR64:
12840 dodyn:
12841 if ((input_section->flags & SEC_ALLOC) == 0)
12842 break;
12843
12844 if (NO_OPD_RELOCS && is_opd)
12845 break;
12846
12847 if ((info->shared
12848 && (h == NULL
12849 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12850 || h->elf.root.type != bfd_link_hash_undefweak)
12851 && (must_be_dyn_reloc (info, r_type)
12852 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12853 || (ELIMINATE_COPY_RELOCS
12854 && !info->shared
12855 && h != NULL
12856 && h->elf.dynindx != -1
12857 && !h->elf.non_got_ref
12858 && !h->elf.def_regular)
12859 || (!info->shared
12860 && (h != NULL
12861 ? h->elf.type == STT_GNU_IFUNC
12862 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12863 {
12864 bfd_boolean skip, relocate;
12865 asection *sreloc;
12866 bfd_vma out_off;
12867
12868 /* When generating a dynamic object, these relocations
12869 are copied into the output file to be resolved at run
12870 time. */
12871
12872 skip = FALSE;
12873 relocate = FALSE;
12874
12875 out_off = _bfd_elf_section_offset (output_bfd, info,
12876 input_section, rel->r_offset);
12877 if (out_off == (bfd_vma) -1)
12878 skip = TRUE;
12879 else if (out_off == (bfd_vma) -2)
12880 skip = TRUE, relocate = TRUE;
12881 out_off += (input_section->output_section->vma
12882 + input_section->output_offset);
12883 outrel.r_offset = out_off;
12884 outrel.r_addend = rel->r_addend;
12885
12886 /* Optimize unaligned reloc use. */
12887 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
12888 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
12889 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
12890 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
12891 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
12892 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
12893 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
12894 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
12895 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
12896
12897 if (skip)
12898 memset (&outrel, 0, sizeof outrel);
12899 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
12900 && !is_opd
12901 && r_type != R_PPC64_TOC)
12902 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
12903 else
12904 {
12905 /* This symbol is local, or marked to become local,
12906 or this is an opd section reloc which must point
12907 at a local function. */
12908 outrel.r_addend += relocation;
12909 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12910 {
12911 if (is_opd && h != NULL)
12912 {
12913 /* Lie about opd entries. This case occurs
12914 when building shared libraries and we
12915 reference a function in another shared
12916 lib. The same thing happens for a weak
12917 definition in an application that's
12918 overridden by a strong definition in a
12919 shared lib. (I believe this is a generic
12920 bug in binutils handling of weak syms.)
12921 In these cases we won't use the opd
12922 entry in this lib. */
12923 unresolved_reloc = FALSE;
12924 }
12925 if (!is_opd
12926 && r_type == R_PPC64_ADDR64
12927 && (h != NULL
12928 ? h->elf.type == STT_GNU_IFUNC
12929 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12930 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12931 else
12932 {
12933 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12934
12935 /* We need to relocate .opd contents for ld.so.
12936 Prelink also wants simple and consistent rules
12937 for relocs. This make all RELATIVE relocs have
12938 *r_offset equal to r_addend. */
12939 relocate = TRUE;
12940 }
12941 }
12942 else
12943 {
12944 long indx = 0;
12945
12946 if (h != NULL
12947 ? h->elf.type == STT_GNU_IFUNC
12948 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12949 {
12950 (*_bfd_error_handler)
12951 (_("%B(%A+0x%lx): relocation %s for indirect "
12952 "function %s unsupported"),
12953 input_bfd,
12954 input_section,
12955 (long) rel->r_offset,
12956 ppc64_elf_howto_table[r_type]->name,
12957 sym_name);
12958 ret = FALSE;
12959 }
12960 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
12961 ;
12962 else if (sec == NULL || sec->owner == NULL)
12963 {
12964 bfd_set_error (bfd_error_bad_value);
12965 return FALSE;
12966 }
12967 else
12968 {
12969 asection *osec;
12970
12971 osec = sec->output_section;
12972 indx = elf_section_data (osec)->dynindx;
12973
12974 if (indx == 0)
12975 {
12976 if ((osec->flags & SEC_READONLY) == 0
12977 && htab->elf.data_index_section != NULL)
12978 osec = htab->elf.data_index_section;
12979 else
12980 osec = htab->elf.text_index_section;
12981 indx = elf_section_data (osec)->dynindx;
12982 }
12983 BFD_ASSERT (indx != 0);
12984
12985 /* We are turning this relocation into one
12986 against a section symbol, so subtract out
12987 the output section's address but not the
12988 offset of the input section in the output
12989 section. */
12990 outrel.r_addend -= osec->vma;
12991 }
12992
12993 outrel.r_info = ELF64_R_INFO (indx, r_type);
12994 }
12995 }
12996
12997 sreloc = elf_section_data (input_section)->sreloc;
12998 if (!htab->elf.dynamic_sections_created)
12999 sreloc = htab->reliplt;
13000 if (sreloc == NULL)
13001 abort ();
13002
13003 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13004 >= sreloc->size)
13005 abort ();
13006 loc = sreloc->contents;
13007 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13008 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13009
13010 /* If this reloc is against an external symbol, it will
13011 be computed at runtime, so there's no need to do
13012 anything now. However, for the sake of prelink ensure
13013 that the section contents are a known value. */
13014 if (! relocate)
13015 {
13016 unresolved_reloc = FALSE;
13017 /* The value chosen here is quite arbitrary as ld.so
13018 ignores section contents except for the special
13019 case of .opd where the contents might be accessed
13020 before relocation. Choose zero, as that won't
13021 cause reloc overflow. */
13022 relocation = 0;
13023 addend = 0;
13024 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13025 to improve backward compatibility with older
13026 versions of ld. */
13027 if (r_type == R_PPC64_ADDR64)
13028 addend = outrel.r_addend;
13029 /* Adjust pc_relative relocs to have zero in *r_offset. */
13030 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13031 addend = (input_section->output_section->vma
13032 + input_section->output_offset
13033 + rel->r_offset);
13034 }
13035 }
13036 break;
13037
13038 case R_PPC64_COPY:
13039 case R_PPC64_GLOB_DAT:
13040 case R_PPC64_JMP_SLOT:
13041 case R_PPC64_JMP_IREL:
13042 case R_PPC64_RELATIVE:
13043 /* We shouldn't ever see these dynamic relocs in relocatable
13044 files. */
13045 /* Fall through. */
13046
13047 case R_PPC64_PLTGOT16:
13048 case R_PPC64_PLTGOT16_DS:
13049 case R_PPC64_PLTGOT16_HA:
13050 case R_PPC64_PLTGOT16_HI:
13051 case R_PPC64_PLTGOT16_LO:
13052 case R_PPC64_PLTGOT16_LO_DS:
13053 case R_PPC64_PLTREL32:
13054 case R_PPC64_PLTREL64:
13055 /* These ones haven't been implemented yet. */
13056
13057 (*_bfd_error_handler)
13058 (_("%B: relocation %s is not supported for symbol %s."),
13059 input_bfd,
13060 ppc64_elf_howto_table[r_type]->name, sym_name);
13061
13062 bfd_set_error (bfd_error_invalid_operation);
13063 ret = FALSE;
13064 continue;
13065 }
13066
13067 /* Multi-instruction sequences that access the TOC can be
13068 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13069 to nop; addi rb,r2,x; */
13070 switch (r_type)
13071 {
13072 default:
13073 break;
13074
13075 case R_PPC64_GOT_TLSLD16_HI:
13076 case R_PPC64_GOT_TLSGD16_HI:
13077 case R_PPC64_GOT_TPREL16_HI:
13078 case R_PPC64_GOT_DTPREL16_HI:
13079 case R_PPC64_GOT16_HI:
13080 case R_PPC64_TOC16_HI:
13081 /* These relocs would only be useful if building up an
13082 offset to later add to r2, perhaps in an indexed
13083 addressing mode instruction. Don't try to optimize.
13084 Unfortunately, the possibility of someone building up an
13085 offset like this or even with the HA relocs, means that
13086 we need to check the high insn when optimizing the low
13087 insn. */
13088 break;
13089
13090 case R_PPC64_GOT_TLSLD16_HA:
13091 case R_PPC64_GOT_TLSGD16_HA:
13092 case R_PPC64_GOT_TPREL16_HA:
13093 case R_PPC64_GOT_DTPREL16_HA:
13094 case R_PPC64_GOT16_HA:
13095 case R_PPC64_TOC16_HA:
13096 /* nop is done later. */
13097 break;
13098
13099 case R_PPC64_GOT_TLSLD16_LO:
13100 case R_PPC64_GOT_TLSGD16_LO:
13101 case R_PPC64_GOT_TPREL16_LO_DS:
13102 case R_PPC64_GOT_DTPREL16_LO_DS:
13103 case R_PPC64_GOT16_LO:
13104 case R_PPC64_GOT16_LO_DS:
13105 case R_PPC64_TOC16_LO:
13106 case R_PPC64_TOC16_LO_DS:
13107 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000)
13108 {
13109 bfd_byte *p = contents + (rel->r_offset & ~3);
13110 insn = bfd_get_32 (input_bfd, p);
13111 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
13112 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
13113 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
13114 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
13115 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
13116 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
13117 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
13118 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
13119 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
13120 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
13121 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
13122 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
13123 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
13124 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
13125 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
13126 && (insn & 3) != 1)
13127 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
13128 && ((insn & 3) == 0 || (insn & 3) == 3)))
13129 {
13130 unsigned int reg = (insn >> 16) & 0x1f;
13131 const Elf_Internal_Rela *ha;
13132 bfd_boolean match_addend;
13133
13134 match_addend = (sym != NULL
13135 && ELF_ST_TYPE (sym->st_info) == STT_SECTION);
13136 ha = ha_reloc_match (relocs, rel, &reg, match_addend,
13137 input_bfd, contents);
13138 if (ha != NULL)
13139 {
13140 insn &= ~(0x1f << 16);
13141 insn |= reg << 16;
13142 bfd_put_32 (input_bfd, insn, p);
13143 if (ha_opt == NULL)
13144 {
13145 ha_opt = bfd_zmalloc (input_section->reloc_count);
13146 if (ha_opt == NULL)
13147 return FALSE;
13148 }
13149 ha_opt[ha - relocs] = 1;
13150 }
13151 else
13152 /* If we don't find a matching high part insn,
13153 something is fishy. Refuse to nop any high
13154 part insn in this section. */
13155 no_ha_opt = TRUE;
13156 }
13157 }
13158 break;
13159 }
13160
13161 /* Do any further special processing. */
13162 switch (r_type)
13163 {
13164 default:
13165 break;
13166
13167 case R_PPC64_ADDR16_HA:
13168 case R_PPC64_REL16_HA:
13169 case R_PPC64_ADDR16_HIGHERA:
13170 case R_PPC64_ADDR16_HIGHESTA:
13171 case R_PPC64_TOC16_HA:
13172 case R_PPC64_SECTOFF_HA:
13173 case R_PPC64_TPREL16_HA:
13174 case R_PPC64_DTPREL16_HA:
13175 case R_PPC64_TPREL16_HIGHER:
13176 case R_PPC64_TPREL16_HIGHERA:
13177 case R_PPC64_TPREL16_HIGHEST:
13178 case R_PPC64_TPREL16_HIGHESTA:
13179 case R_PPC64_DTPREL16_HIGHER:
13180 case R_PPC64_DTPREL16_HIGHERA:
13181 case R_PPC64_DTPREL16_HIGHEST:
13182 case R_PPC64_DTPREL16_HIGHESTA:
13183 /* It's just possible that this symbol is a weak symbol
13184 that's not actually defined anywhere. In that case,
13185 'sec' would be NULL, and we should leave the symbol
13186 alone (it will be set to zero elsewhere in the link). */
13187 if (sec == NULL)
13188 break;
13189 /* Fall thru */
13190
13191 case R_PPC64_GOT16_HA:
13192 case R_PPC64_PLTGOT16_HA:
13193 case R_PPC64_PLT16_HA:
13194 case R_PPC64_GOT_TLSGD16_HA:
13195 case R_PPC64_GOT_TLSLD16_HA:
13196 case R_PPC64_GOT_TPREL16_HA:
13197 case R_PPC64_GOT_DTPREL16_HA:
13198 /* Add 0x10000 if sign bit in 0:15 is set.
13199 Bits 0:15 are not used. */
13200 addend += 0x8000;
13201 break;
13202
13203 case R_PPC64_ADDR16_DS:
13204 case R_PPC64_ADDR16_LO_DS:
13205 case R_PPC64_GOT16_DS:
13206 case R_PPC64_GOT16_LO_DS:
13207 case R_PPC64_PLT16_LO_DS:
13208 case R_PPC64_SECTOFF_DS:
13209 case R_PPC64_SECTOFF_LO_DS:
13210 case R_PPC64_TOC16_DS:
13211 case R_PPC64_TOC16_LO_DS:
13212 case R_PPC64_PLTGOT16_DS:
13213 case R_PPC64_PLTGOT16_LO_DS:
13214 case R_PPC64_GOT_TPREL16_DS:
13215 case R_PPC64_GOT_TPREL16_LO_DS:
13216 case R_PPC64_GOT_DTPREL16_DS:
13217 case R_PPC64_GOT_DTPREL16_LO_DS:
13218 case R_PPC64_TPREL16_DS:
13219 case R_PPC64_TPREL16_LO_DS:
13220 case R_PPC64_DTPREL16_DS:
13221 case R_PPC64_DTPREL16_LO_DS:
13222 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13223 mask = 3;
13224 /* If this reloc is against an lq insn, then the value must be
13225 a multiple of 16. This is somewhat of a hack, but the
13226 "correct" way to do this by defining _DQ forms of all the
13227 _DS relocs bloats all reloc switches in this file. It
13228 doesn't seem to make much sense to use any of these relocs
13229 in data, so testing the insn should be safe. */
13230 if ((insn & (0x3f << 26)) == (56u << 26))
13231 mask = 15;
13232 if (((relocation + addend) & mask) != 0)
13233 {
13234 (*_bfd_error_handler)
13235 (_("%B(%A+0x%lx): error: %s not a multiple of %u"),
13236 input_bfd, input_section, (long) rel->r_offset,
13237 ppc64_elf_howto_table[r_type]->name,
13238 mask + 1);
13239 bfd_set_error (bfd_error_bad_value);
13240 ret = FALSE;
13241 continue;
13242 }
13243 break;
13244 }
13245
13246 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13247 because such sections are not SEC_ALLOC and thus ld.so will
13248 not process them. */
13249 if (unresolved_reloc
13250 && !((input_section->flags & SEC_DEBUGGING) != 0
13251 && h->elf.def_dynamic))
13252 {
13253 (*_bfd_error_handler)
13254 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
13255 input_bfd,
13256 input_section,
13257 (long) rel->r_offset,
13258 ppc64_elf_howto_table[(int) r_type]->name,
13259 h->elf.root.root.string);
13260 ret = FALSE;
13261 }
13262
13263 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13264 input_bfd,
13265 input_section,
13266 contents,
13267 rel->r_offset,
13268 relocation,
13269 addend);
13270
13271 if (r != bfd_reloc_ok)
13272 {
13273 if (sym_name == NULL)
13274 sym_name = "(null)";
13275 if (r == bfd_reloc_overflow)
13276 {
13277 if (warned)
13278 continue;
13279 if (h != NULL
13280 && h->elf.root.type == bfd_link_hash_undefweak
13281 && ppc64_elf_howto_table[r_type]->pc_relative)
13282 {
13283 /* Assume this is a call protected by other code that
13284 detects the symbol is undefined. If this is the case,
13285 we can safely ignore the overflow. If not, the
13286 program is hosed anyway, and a little warning isn't
13287 going to help. */
13288
13289 continue;
13290 }
13291
13292 if (!((*info->callbacks->reloc_overflow)
13293 (info, (h ? &h->elf.root : NULL), sym_name,
13294 ppc64_elf_howto_table[r_type]->name,
13295 orig_addend, input_bfd, input_section, rel->r_offset)))
13296 return FALSE;
13297 }
13298 else
13299 {
13300 (*_bfd_error_handler)
13301 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
13302 input_bfd,
13303 input_section,
13304 (long) rel->r_offset,
13305 ppc64_elf_howto_table[r_type]->name,
13306 sym_name,
13307 (int) r);
13308 ret = FALSE;
13309 }
13310 }
13311 }
13312
13313 if (ha_opt != NULL)
13314 {
13315 if (!no_ha_opt)
13316 {
13317 unsigned char *opt = ha_opt;
13318 rel = relocs;
13319 relend = relocs + input_section->reloc_count;
13320 for (; rel < relend; opt++, rel++)
13321 if (*opt != 0)
13322 {
13323 bfd_byte *p = contents + (rel->r_offset & ~3);
13324 bfd_put_32 (input_bfd, NOP, p);
13325 }
13326 }
13327 free (ha_opt);
13328 }
13329
13330 /* If we're emitting relocations, then shortly after this function
13331 returns, reloc offsets and addends for this section will be
13332 adjusted. Worse, reloc symbol indices will be for the output
13333 file rather than the input. Save a copy of the relocs for
13334 opd_entry_value. */
13335 if (is_opd && (info->emitrelocations || info->relocatable))
13336 {
13337 bfd_size_type amt;
13338 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13339 rel = bfd_alloc (input_bfd, amt);
13340 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13341 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13342 if (rel == NULL)
13343 return FALSE;
13344 memcpy (rel, relocs, amt);
13345 }
13346 return ret;
13347 }
13348
13349 /* Adjust the value of any local symbols in opd sections. */
13350
13351 static int
13352 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13353 const char *name ATTRIBUTE_UNUSED,
13354 Elf_Internal_Sym *elfsym,
13355 asection *input_sec,
13356 struct elf_link_hash_entry *h)
13357 {
13358 struct _opd_sec_data *opd;
13359 long adjust;
13360 bfd_vma value;
13361
13362 if (h != NULL)
13363 return 1;
13364
13365 opd = get_opd_info (input_sec);
13366 if (opd == NULL || opd->adjust == NULL)
13367 return 1;
13368
13369 value = elfsym->st_value - input_sec->output_offset;
13370 if (!info->relocatable)
13371 value -= input_sec->output_section->vma;
13372
13373 adjust = opd->adjust[value / 8];
13374 if (adjust == -1)
13375 return 2;
13376
13377 elfsym->st_value += adjust;
13378 return 1;
13379 }
13380
13381 /* Finish up dynamic symbol handling. We set the contents of various
13382 dynamic sections here. */
13383
13384 static bfd_boolean
13385 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13386 struct bfd_link_info *info,
13387 struct elf_link_hash_entry *h,
13388 Elf_Internal_Sym *sym)
13389 {
13390 struct ppc_link_hash_table *htab;
13391 struct plt_entry *ent;
13392 Elf_Internal_Rela rela;
13393 bfd_byte *loc;
13394
13395 htab = ppc_hash_table (info);
13396 if (htab == NULL)
13397 return FALSE;
13398
13399 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13400 if (ent->plt.offset != (bfd_vma) -1)
13401 {
13402 /* This symbol has an entry in the procedure linkage
13403 table. Set it up. */
13404 if (!htab->elf.dynamic_sections_created
13405 || h->dynindx == -1)
13406 {
13407 BFD_ASSERT (h->type == STT_GNU_IFUNC
13408 && h->def_regular
13409 && (h->root.type == bfd_link_hash_defined
13410 || h->root.type == bfd_link_hash_defweak));
13411 rela.r_offset = (htab->iplt->output_section->vma
13412 + htab->iplt->output_offset
13413 + ent->plt.offset);
13414 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13415 rela.r_addend = (h->root.u.def.value
13416 + h->root.u.def.section->output_offset
13417 + h->root.u.def.section->output_section->vma
13418 + ent->addend);
13419 loc = (htab->reliplt->contents
13420 + (htab->reliplt->reloc_count++
13421 * sizeof (Elf64_External_Rela)));
13422 }
13423 else
13424 {
13425 rela.r_offset = (htab->plt->output_section->vma
13426 + htab->plt->output_offset
13427 + ent->plt.offset);
13428 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13429 rela.r_addend = ent->addend;
13430 loc = (htab->relplt->contents
13431 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13432 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13433 }
13434 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13435 }
13436
13437 if (h->needs_copy)
13438 {
13439 /* This symbol needs a copy reloc. Set it up. */
13440
13441 if (h->dynindx == -1
13442 || (h->root.type != bfd_link_hash_defined
13443 && h->root.type != bfd_link_hash_defweak)
13444 || htab->relbss == NULL)
13445 abort ();
13446
13447 rela.r_offset = (h->root.u.def.value
13448 + h->root.u.def.section->output_section->vma
13449 + h->root.u.def.section->output_offset);
13450 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13451 rela.r_addend = 0;
13452 loc = htab->relbss->contents;
13453 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13454 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13455 }
13456
13457 /* Mark some specially defined symbols as absolute. */
13458 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13459 sym->st_shndx = SHN_ABS;
13460
13461 return TRUE;
13462 }
13463
13464 /* Used to decide how to sort relocs in an optimal manner for the
13465 dynamic linker, before writing them out. */
13466
13467 static enum elf_reloc_type_class
13468 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13469 {
13470 enum elf_ppc64_reloc_type r_type;
13471
13472 r_type = ELF64_R_TYPE (rela->r_info);
13473 switch (r_type)
13474 {
13475 case R_PPC64_RELATIVE:
13476 return reloc_class_relative;
13477 case R_PPC64_JMP_SLOT:
13478 return reloc_class_plt;
13479 case R_PPC64_COPY:
13480 return reloc_class_copy;
13481 default:
13482 return reloc_class_normal;
13483 }
13484 }
13485
13486 /* Finish up the dynamic sections. */
13487
13488 static bfd_boolean
13489 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13490 struct bfd_link_info *info)
13491 {
13492 struct ppc_link_hash_table *htab;
13493 bfd *dynobj;
13494 asection *sdyn;
13495
13496 htab = ppc_hash_table (info);
13497 if (htab == NULL)
13498 return FALSE;
13499
13500 dynobj = htab->elf.dynobj;
13501 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13502
13503 if (htab->elf.dynamic_sections_created)
13504 {
13505 Elf64_External_Dyn *dyncon, *dynconend;
13506
13507 if (sdyn == NULL || htab->got == NULL)
13508 abort ();
13509
13510 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13511 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13512 for (; dyncon < dynconend; dyncon++)
13513 {
13514 Elf_Internal_Dyn dyn;
13515 asection *s;
13516
13517 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13518
13519 switch (dyn.d_tag)
13520 {
13521 default:
13522 continue;
13523
13524 case DT_PPC64_GLINK:
13525 s = htab->glink;
13526 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13527 /* We stupidly defined DT_PPC64_GLINK to be the start
13528 of glink rather than the first entry point, which is
13529 what ld.so needs, and now have a bigger stub to
13530 support automatic multiple TOCs. */
13531 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13532 break;
13533
13534 case DT_PPC64_OPD:
13535 s = bfd_get_section_by_name (output_bfd, ".opd");
13536 if (s == NULL)
13537 continue;
13538 dyn.d_un.d_ptr = s->vma;
13539 break;
13540
13541 case DT_PPC64_OPDSZ:
13542 s = bfd_get_section_by_name (output_bfd, ".opd");
13543 if (s == NULL)
13544 continue;
13545 dyn.d_un.d_val = s->size;
13546 break;
13547
13548 case DT_PLTGOT:
13549 s = htab->plt;
13550 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13551 break;
13552
13553 case DT_JMPREL:
13554 s = htab->relplt;
13555 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13556 break;
13557
13558 case DT_PLTRELSZ:
13559 dyn.d_un.d_val = htab->relplt->size;
13560 break;
13561
13562 case DT_RELASZ:
13563 /* Don't count procedure linkage table relocs in the
13564 overall reloc count. */
13565 s = htab->relplt;
13566 if (s == NULL)
13567 continue;
13568 dyn.d_un.d_val -= s->size;
13569 break;
13570
13571 case DT_RELA:
13572 /* We may not be using the standard ELF linker script.
13573 If .rela.plt is the first .rela section, we adjust
13574 DT_RELA to not include it. */
13575 s = htab->relplt;
13576 if (s == NULL)
13577 continue;
13578 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13579 continue;
13580 dyn.d_un.d_ptr += s->size;
13581 break;
13582 }
13583
13584 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13585 }
13586 }
13587
13588 if (htab->got != NULL && htab->got->size != 0)
13589 {
13590 /* Fill in the first entry in the global offset table.
13591 We use it to hold the link-time TOCbase. */
13592 bfd_put_64 (output_bfd,
13593 elf_gp (output_bfd) + TOC_BASE_OFF,
13594 htab->got->contents);
13595
13596 /* Set .got entry size. */
13597 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13598 }
13599
13600 if (htab->plt != NULL && htab->plt->size != 0)
13601 {
13602 /* Set .plt entry size. */
13603 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13604 = PLT_ENTRY_SIZE;
13605 }
13606
13607 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13608 brlt ourselves if emitrelocations. */
13609 if (htab->brlt != NULL
13610 && htab->brlt->reloc_count != 0
13611 && !_bfd_elf_link_output_relocs (output_bfd,
13612 htab->brlt,
13613 elf_section_data (htab->brlt)->rela.hdr,
13614 elf_section_data (htab->brlt)->relocs,
13615 NULL))
13616 return FALSE;
13617
13618 if (htab->glink != NULL
13619 && htab->glink->reloc_count != 0
13620 && !_bfd_elf_link_output_relocs (output_bfd,
13621 htab->glink,
13622 elf_section_data (htab->glink)->rela.hdr,
13623 elf_section_data (htab->glink)->relocs,
13624 NULL))
13625 return FALSE;
13626
13627 /* We need to handle writing out multiple GOT sections ourselves,
13628 since we didn't add them to DYNOBJ. We know dynobj is the first
13629 bfd. */
13630 while ((dynobj = dynobj->link_next) != NULL)
13631 {
13632 asection *s;
13633
13634 if (!is_ppc64_elf (dynobj))
13635 continue;
13636
13637 s = ppc64_elf_tdata (dynobj)->got;
13638 if (s != NULL
13639 && s->size != 0
13640 && s->output_section != bfd_abs_section_ptr
13641 && !bfd_set_section_contents (output_bfd, s->output_section,
13642 s->contents, s->output_offset,
13643 s->size))
13644 return FALSE;
13645 s = ppc64_elf_tdata (dynobj)->relgot;
13646 if (s != NULL
13647 && s->size != 0
13648 && s->output_section != bfd_abs_section_ptr
13649 && !bfd_set_section_contents (output_bfd, s->output_section,
13650 s->contents, s->output_offset,
13651 s->size))
13652 return FALSE;
13653 }
13654
13655 return TRUE;
13656 }
13657
13658 #include "elf64-target.h"
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