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PR binutils/10924
[binutils.git] / bfd / elf64-ppc.c
blob35757b85d5c35ab372bd7b13a4a42865e8025349
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009 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 <amodra@bigpond.net.au>
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_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_process_dot_syms
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_keep ppc64_elf_gc_keep
100 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
101 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
102 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
103 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
104 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
105 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
106 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
107 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
108 #define elf_backend_action_discarded ppc64_elf_action_discarded
109 #define elf_backend_relocate_section ppc64_elf_relocate_section
110 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
111 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
112 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
113 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
114 #define elf_backend_special_sections ppc64_elf_special_sections
115 #define elf_backend_post_process_headers _bfd_elf_set_osabi
116
117 /* The name of the dynamic interpreter. This is put in the .interp
118 section. */
119 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
120
121 /* The size in bytes of an entry in the procedure linkage table. */
122 #define PLT_ENTRY_SIZE 24
123
124 /* The initial size of the plt reserved for the dynamic linker. */
125 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
126
127 /* TOC base pointers offset from start of TOC. */
128 #define TOC_BASE_OFF 0x8000
129
130 /* Offset of tp and dtp pointers from start of TLS block. */
131 #define TP_OFFSET 0x7000
132 #define DTP_OFFSET 0x8000
133
134 /* .plt call stub instructions. The normal stub is like this, but
135 sometimes the .plt entry crosses a 64k boundary and we need to
136 insert an addi to adjust r12. */
137 #define PLT_CALL_STUB_SIZE (7*4)
138 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
139 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
140 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
141 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
142 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
143 /* ld %r11,xxx+16@l(%r12) */
144 #define BCTR 0x4e800420 /* bctr */
145
146
147 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
148 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
149 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
150 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
151
152 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
153 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
154
155 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
156
157 /* glink call stub instructions. We enter with the index in R0. */
158 #define GLINK_CALL_STUB_SIZE (16*4)
159 /* 0: */
160 /* .quad plt0-1f */
161 /* __glink: */
162 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
163 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
164 /* 1: */
165 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
166 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
167 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
168 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
169 /* ld %11,0(%12) */
170 /* ld %2,8(%12) */
171 /* mtctr %11 */
172 /* ld %11,16(%12) */
173 /* bctr */
174
175 /* Pad with this. */
176 #define NOP 0x60000000
177
178 /* Some other nops. */
179 #define CROR_151515 0x4def7b82
180 #define CROR_313131 0x4ffffb82
181
182 /* .glink entries for the first 32k functions are two instructions. */
183 #define LI_R0_0 0x38000000 /* li %r0,0 */
184 #define B_DOT 0x48000000 /* b . */
185
186 /* After that, we need two instructions to load the index, followed by
187 a branch. */
188 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
189 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
190
191 /* Instructions used by the save and restore reg functions. */
192 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
193 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
194 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
195 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
196 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
197 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
198 #define LI_R12_0 0x39800000 /* li %r12,0 */
199 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
200 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
201 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
202 #define BLR 0x4e800020 /* blr */
203
204 /* Since .opd is an array of descriptors and each entry will end up
205 with identical R_PPC64_RELATIVE relocs, there is really no need to
206 propagate .opd relocs; The dynamic linker should be taught to
207 relocate .opd without reloc entries. */
208 #ifndef NO_OPD_RELOCS
209 #define NO_OPD_RELOCS 0
210 #endif
211 \f
212 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
213
214 /* Relocation HOWTO's. */
215 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
216
217 static reloc_howto_type ppc64_elf_howto_raw[] = {
218 /* This reloc does nothing. */
219 HOWTO (R_PPC64_NONE, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_dont, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC64_NONE", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 32 bit relocation. */
234 HOWTO (R_PPC64_ADDR32, /* type */
235 0, /* rightshift */
236 2, /* size (0 = byte, 1 = short, 2 = long) */
237 32, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC64_ADDR32", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffffffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* An absolute 26 bit branch; the lower two bits must be zero.
249 FIXME: we don't check that, we just clear them. */
250 HOWTO (R_PPC64_ADDR24, /* type */
251 0, /* rightshift */
252 2, /* size (0 = byte, 1 = short, 2 = long) */
253 26, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_bitfield, /* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_PPC64_ADDR24", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0x03fffffc, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* A standard 16 bit relocation. */
265 HOWTO (R_PPC64_ADDR16, /* type */
266 0, /* rightshift */
267 1, /* size (0 = byte, 1 = short, 2 = long) */
268 16, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_bitfield, /* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC64_ADDR16", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0xffff, /* dst_mask */
277 FALSE), /* pcrel_offset */
278
279 /* A 16 bit relocation without overflow. */
280 HOWTO (R_PPC64_ADDR16_LO, /* type */
281 0, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont,/* complain_on_overflow */
287 bfd_elf_generic_reloc, /* special_function */
288 "R_PPC64_ADDR16_LO", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* Bits 16-31 of an address. */
295 HOWTO (R_PPC64_ADDR16_HI, /* type */
296 16, /* rightshift */
297 1, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_dont, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC64_ADDR16_HI", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0xffff, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
310 bits, treated as a signed number, is negative. */
311 HOWTO (R_PPC64_ADDR16_HA, /* type */
312 16, /* rightshift */
313 1, /* size (0 = byte, 1 = short, 2 = long) */
314 16, /* bitsize */
315 FALSE, /* pc_relative */
316 0, /* bitpos */
317 complain_overflow_dont, /* complain_on_overflow */
318 ppc64_elf_ha_reloc, /* special_function */
319 "R_PPC64_ADDR16_HA", /* name */
320 FALSE, /* partial_inplace */
321 0, /* src_mask */
322 0xffff, /* dst_mask */
323 FALSE), /* pcrel_offset */
324
325 /* An absolute 16 bit branch; the lower two bits must be zero.
326 FIXME: we don't check that, we just clear them. */
327 HOWTO (R_PPC64_ADDR14, /* type */
328 0, /* rightshift */
329 2, /* size (0 = byte, 1 = short, 2 = long) */
330 16, /* bitsize */
331 FALSE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_bitfield, /* complain_on_overflow */
334 ppc64_elf_branch_reloc, /* special_function */
335 "R_PPC64_ADDR14", /* name */
336 FALSE, /* partial_inplace */
337 0, /* src_mask */
338 0x0000fffc, /* dst_mask */
339 FALSE), /* pcrel_offset */
340
341 /* An absolute 16 bit branch, for which bit 10 should be set to
342 indicate that the branch is expected to be taken. The lower two
343 bits must be zero. */
344 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 16, /* bitsize */
348 FALSE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_bitfield, /* complain_on_overflow */
351 ppc64_elf_brtaken_reloc, /* special_function */
352 "R_PPC64_ADDR14_BRTAKEN",/* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x0000fffc, /* dst_mask */
356 FALSE), /* pcrel_offset */
357
358 /* An absolute 16 bit branch, for which bit 10 should be set to
359 indicate that the branch is not expected to be taken. The lower
360 two bits must be zero. */
361 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
362 0, /* rightshift */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_bitfield, /* complain_on_overflow */
368 ppc64_elf_brtaken_reloc, /* special_function */
369 "R_PPC64_ADDR14_BRNTAKEN",/* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0x0000fffc, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* A relative 26 bit branch; the lower two bits must be zero. */
376 HOWTO (R_PPC64_REL24, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 26, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 ppc64_elf_branch_reloc, /* special_function */
384 "R_PPC64_REL24", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0x03fffffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch; the lower two bits must be zero. */
391 HOWTO (R_PPC64_REL14, /* type */
392 0, /* rightshift */
393 2, /* size (0 = byte, 1 = short, 2 = long) */
394 16, /* bitsize */
395 TRUE, /* pc_relative */
396 0, /* bitpos */
397 complain_overflow_signed, /* complain_on_overflow */
398 ppc64_elf_branch_reloc, /* special_function */
399 "R_PPC64_REL14", /* name */
400 FALSE, /* partial_inplace */
401 0, /* src_mask */
402 0x0000fffc, /* dst_mask */
403 TRUE), /* pcrel_offset */
404
405 /* A relative 16 bit branch. Bit 10 should be set to indicate that
406 the branch is expected to be taken. The lower two bits must be
407 zero. */
408 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 16, /* bitsize */
412 TRUE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_signed, /* complain_on_overflow */
415 ppc64_elf_brtaken_reloc, /* special_function */
416 "R_PPC64_REL14_BRTAKEN", /* name */
417 FALSE, /* partial_inplace */
418 0, /* src_mask */
419 0x0000fffc, /* dst_mask */
420 TRUE), /* pcrel_offset */
421
422 /* A relative 16 bit branch. Bit 10 should be set to indicate that
423 the branch is not expected to be taken. The lower two bits must
424 be zero. */
425 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
426 0, /* rightshift */
427 2, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 TRUE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_signed, /* complain_on_overflow */
432 ppc64_elf_brtaken_reloc, /* special_function */
433 "R_PPC64_REL14_BRNTAKEN",/* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0x0000fffc, /* dst_mask */
437 TRUE), /* pcrel_offset */
438
439 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
440 symbol. */
441 HOWTO (R_PPC64_GOT16, /* type */
442 0, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_unhandled_reloc, /* special_function */
449 "R_PPC64_GOT16", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC64_GOT16_LO, /* type */
458 0, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont, /* complain_on_overflow */
464 ppc64_elf_unhandled_reloc, /* special_function */
465 "R_PPC64_GOT16_LO", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
472 the symbol. */
473 HOWTO (R_PPC64_GOT16_HI, /* type */
474 16, /* rightshift */
475 1, /* size (0 = byte, 1 = short, 2 = long) */
476 16, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_dont,/* complain_on_overflow */
480 ppc64_elf_unhandled_reloc, /* special_function */
481 "R_PPC64_GOT16_HI", /* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0xffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
488 the symbol. */
489 HOWTO (R_PPC64_GOT16_HA, /* type */
490 16, /* rightshift */
491 1, /* size (0 = byte, 1 = short, 2 = long) */
492 16, /* bitsize */
493 FALSE, /* pc_relative */
494 0, /* bitpos */
495 complain_overflow_dont,/* complain_on_overflow */
496 ppc64_elf_unhandled_reloc, /* special_function */
497 "R_PPC64_GOT16_HA", /* name */
498 FALSE, /* partial_inplace */
499 0, /* src_mask */
500 0xffff, /* dst_mask */
501 FALSE), /* pcrel_offset */
502
503 /* This is used only by the dynamic linker. The symbol should exist
504 both in the object being run and in some shared library. The
505 dynamic linker copies the data addressed by the symbol from the
506 shared library into the object, because the object being
507 run has to have the data at some particular address. */
508 HOWTO (R_PPC64_COPY, /* type */
509 0, /* rightshift */
510 0, /* this one is variable size */
511 0, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 ppc64_elf_unhandled_reloc, /* special_function */
516 "R_PPC64_COPY", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Like R_PPC64_ADDR64, but used when setting global offset table
523 entries. */
524 HOWTO (R_PPC64_GLOB_DAT, /* type */
525 0, /* rightshift */
526 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
527 64, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc64_elf_unhandled_reloc, /* special_function */
532 "R_PPC64_GLOB_DAT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 ONES (64), /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Created by the link editor. Marks a procedure linkage table
539 entry for a symbol. */
540 HOWTO (R_PPC64_JMP_SLOT, /* type */
541 0, /* rightshift */
542 0, /* size (0 = byte, 1 = short, 2 = long) */
543 0, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 ppc64_elf_unhandled_reloc, /* special_function */
548 "R_PPC64_JMP_SLOT", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Used only by the dynamic linker. When the object is run, this
555 doubleword64 is set to the load address of the object, plus the
556 addend. */
557 HOWTO (R_PPC64_RELATIVE, /* type */
558 0, /* rightshift */
559 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
560 64, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_dont, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC64_RELATIVE", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 ONES (64), /* dst_mask */
569 FALSE), /* pcrel_offset */
570
571 /* Like R_PPC64_ADDR32, but may be unaligned. */
572 HOWTO (R_PPC64_UADDR32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_bitfield, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC64_UADDR32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* Like R_PPC64_ADDR16, but may be unaligned. */
587 HOWTO (R_PPC64_UADDR16, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_bitfield, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC64_UADDR16", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 32-bit PC relative. */
602 HOWTO (R_PPC64_REL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 /* FIXME: Verify. Was complain_overflow_bitfield. */
609 complain_overflow_signed, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC64_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table. */
618 HOWTO (R_PPC64_PLT32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 ppc64_elf_unhandled_reloc, /* special_function */
626 "R_PPC64_PLT32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0xffffffff, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
633 FIXME: R_PPC64_PLTREL32 not supported. */
634 HOWTO (R_PPC64_PLTREL32, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 32, /* bitsize */
638 TRUE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_signed, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC64_PLTREL32", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffffffff, /* dst_mask */
646 TRUE), /* pcrel_offset */
647
648 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC64_PLT16_LO, /* type */
651 0, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 ppc64_elf_unhandled_reloc, /* special_function */
658 "R_PPC64_PLT16_LO", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC64_PLT16_HI, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 ppc64_elf_unhandled_reloc, /* special_function */
674 "R_PPC64_PLT16_HI", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
681 the symbol. */
682 HOWTO (R_PPC64_PLT16_HA, /* type */
683 16, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc64_elf_unhandled_reloc, /* special_function */
690 "R_PPC64_PLT16_HA", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit section relative relocation. */
697 HOWTO (R_PPC64_SECTOFF, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield, /* complain_on_overflow */
704 ppc64_elf_sectoff_reloc, /* special_function */
705 "R_PPC64_SECTOFF", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* Like R_PPC64_SECTOFF, but no overflow warning. */
712 HOWTO (R_PPC64_SECTOFF_LO, /* type */
713 0, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 ppc64_elf_sectoff_reloc, /* special_function */
720 "R_PPC64_SECTOFF_LO", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half section relative relocation. */
727 HOWTO (R_PPC64_SECTOFF_HI, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 ppc64_elf_sectoff_reloc, /* special_function */
735 "R_PPC64_SECTOFF_HI", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* 16-bit upper half adjusted section relative relocation. */
742 HOWTO (R_PPC64_SECTOFF_HA, /* type */
743 16, /* rightshift */
744 1, /* size (0 = byte, 1 = short, 2 = long) */
745 16, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_dont, /* complain_on_overflow */
749 ppc64_elf_sectoff_ha_reloc, /* special_function */
750 "R_PPC64_SECTOFF_HA", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xffff, /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* Like R_PPC64_REL24 without touching the two least significant bits. */
757 HOWTO (R_PPC64_REL30, /* type */
758 2, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 30, /* bitsize */
761 TRUE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC64_REL30", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0xfffffffc, /* dst_mask */
769 TRUE), /* pcrel_offset */
770
771 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
772
773 /* A standard 64-bit relocation. */
774 HOWTO (R_PPC64_ADDR64, /* type */
775 0, /* rightshift */
776 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
777 64, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC64_ADDR64", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 ONES (64), /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 /* The bits 32-47 of an address. */
789 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
790 32, /* rightshift */
791 1, /* size (0 = byte, 1 = short, 2 = long) */
792 16, /* bitsize */
793 FALSE, /* pc_relative */
794 0, /* bitpos */
795 complain_overflow_dont, /* complain_on_overflow */
796 bfd_elf_generic_reloc, /* special_function */
797 "R_PPC64_ADDR16_HIGHER", /* name */
798 FALSE, /* partial_inplace */
799 0, /* src_mask */
800 0xffff, /* dst_mask */
801 FALSE), /* pcrel_offset */
802
803 /* The bits 32-47 of an address, plus 1 if the contents of the low
804 16 bits, treated as a signed number, is negative. */
805 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
806 32, /* rightshift */
807 1, /* size (0 = byte, 1 = short, 2 = long) */
808 16, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 ppc64_elf_ha_reloc, /* special_function */
813 "R_PPC64_ADDR16_HIGHERA", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0xffff, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* The bits 48-63 of an address. */
820 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
821 48, /* rightshift */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
823 16, /* bitsize */
824 FALSE, /* pc_relative */
825 0, /* bitpos */
826 complain_overflow_dont, /* complain_on_overflow */
827 bfd_elf_generic_reloc, /* special_function */
828 "R_PPC64_ADDR16_HIGHEST", /* name */
829 FALSE, /* partial_inplace */
830 0, /* src_mask */
831 0xffff, /* dst_mask */
832 FALSE), /* pcrel_offset */
833
834 /* The bits 48-63 of an address, plus 1 if the contents of the low
835 16 bits, treated as a signed number, is negative. */
836 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
837 48, /* rightshift */
838 1, /* size (0 = byte, 1 = short, 2 = long) */
839 16, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 ppc64_elf_ha_reloc, /* special_function */
844 "R_PPC64_ADDR16_HIGHESTA", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 0xffff, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* Like ADDR64, but may be unaligned. */
851 HOWTO (R_PPC64_UADDR64, /* type */
852 0, /* rightshift */
853 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
854 64, /* bitsize */
855 FALSE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont, /* complain_on_overflow */
858 bfd_elf_generic_reloc, /* special_function */
859 "R_PPC64_UADDR64", /* name */
860 FALSE, /* partial_inplace */
861 0, /* src_mask */
862 ONES (64), /* dst_mask */
863 FALSE), /* pcrel_offset */
864
865 /* 64-bit relative relocation. */
866 HOWTO (R_PPC64_REL64, /* type */
867 0, /* rightshift */
868 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
869 64, /* bitsize */
870 TRUE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 bfd_elf_generic_reloc, /* special_function */
874 "R_PPC64_REL64", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 ONES (64), /* dst_mask */
878 TRUE), /* pcrel_offset */
879
880 /* 64-bit relocation to the symbol's procedure linkage table. */
881 HOWTO (R_PPC64_PLT64, /* type */
882 0, /* rightshift */
883 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
884 64, /* bitsize */
885 FALSE, /* pc_relative */
886 0, /* bitpos */
887 complain_overflow_dont, /* complain_on_overflow */
888 ppc64_elf_unhandled_reloc, /* special_function */
889 "R_PPC64_PLT64", /* name */
890 FALSE, /* partial_inplace */
891 0, /* src_mask */
892 ONES (64), /* dst_mask */
893 FALSE), /* pcrel_offset */
894
895 /* 64-bit PC relative relocation to the symbol's procedure linkage
896 table. */
897 /* FIXME: R_PPC64_PLTREL64 not supported. */
898 HOWTO (R_PPC64_PLTREL64, /* type */
899 0, /* rightshift */
900 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
901 64, /* bitsize */
902 TRUE, /* pc_relative */
903 0, /* bitpos */
904 complain_overflow_dont, /* complain_on_overflow */
905 ppc64_elf_unhandled_reloc, /* special_function */
906 "R_PPC64_PLTREL64", /* name */
907 FALSE, /* partial_inplace */
908 0, /* src_mask */
909 ONES (64), /* dst_mask */
910 TRUE), /* pcrel_offset */
911
912 /* 16 bit TOC-relative relocation. */
913
914 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
915 HOWTO (R_PPC64_TOC16, /* type */
916 0, /* rightshift */
917 1, /* size (0 = byte, 1 = short, 2 = long) */
918 16, /* bitsize */
919 FALSE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_signed, /* complain_on_overflow */
922 ppc64_elf_toc_reloc, /* special_function */
923 "R_PPC64_TOC16", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 0xffff, /* dst_mask */
927 FALSE), /* pcrel_offset */
928
929 /* 16 bit TOC-relative relocation without overflow. */
930
931 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
932 HOWTO (R_PPC64_TOC16_LO, /* type */
933 0, /* rightshift */
934 1, /* size (0 = byte, 1 = short, 2 = long) */
935 16, /* bitsize */
936 FALSE, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont, /* complain_on_overflow */
939 ppc64_elf_toc_reloc, /* special_function */
940 "R_PPC64_TOC16_LO", /* name */
941 FALSE, /* partial_inplace */
942 0, /* src_mask */
943 0xffff, /* dst_mask */
944 FALSE), /* pcrel_offset */
945
946 /* 16 bit TOC-relative relocation, high 16 bits. */
947
948 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
949 HOWTO (R_PPC64_TOC16_HI, /* type */
950 16, /* rightshift */
951 1, /* size (0 = byte, 1 = short, 2 = long) */
952 16, /* bitsize */
953 FALSE, /* pc_relative */
954 0, /* bitpos */
955 complain_overflow_dont, /* complain_on_overflow */
956 ppc64_elf_toc_reloc, /* special_function */
957 "R_PPC64_TOC16_HI", /* name */
958 FALSE, /* partial_inplace */
959 0, /* src_mask */
960 0xffff, /* dst_mask */
961 FALSE), /* pcrel_offset */
962
963 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
964 contents of the low 16 bits, treated as a signed number, is
965 negative. */
966
967 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
968 HOWTO (R_PPC64_TOC16_HA, /* type */
969 16, /* rightshift */
970 1, /* size (0 = byte, 1 = short, 2 = long) */
971 16, /* bitsize */
972 FALSE, /* pc_relative */
973 0, /* bitpos */
974 complain_overflow_dont, /* complain_on_overflow */
975 ppc64_elf_toc_ha_reloc, /* special_function */
976 "R_PPC64_TOC16_HA", /* name */
977 FALSE, /* partial_inplace */
978 0, /* src_mask */
979 0xffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
981
982 /* 64-bit relocation; insert value of TOC base (.TOC.). */
983
984 /* R_PPC64_TOC 51 doubleword64 .TOC. */
985 HOWTO (R_PPC64_TOC, /* type */
986 0, /* rightshift */
987 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
988 64, /* bitsize */
989 FALSE, /* pc_relative */
990 0, /* bitpos */
991 complain_overflow_bitfield, /* complain_on_overflow */
992 ppc64_elf_toc64_reloc, /* special_function */
993 "R_PPC64_TOC", /* name */
994 FALSE, /* partial_inplace */
995 0, /* src_mask */
996 ONES (64), /* dst_mask */
997 FALSE), /* pcrel_offset */
998
999 /* Like R_PPC64_GOT16, but also informs the link editor that the
1000 value to relocate may (!) refer to a PLT entry which the link
1001 editor (a) may replace with the symbol value. If the link editor
1002 is unable to fully resolve the symbol, it may (b) create a PLT
1003 entry and store the address to the new PLT entry in the GOT.
1004 This permits lazy resolution of function symbols at run time.
1005 The link editor may also skip all of this and just (c) emit a
1006 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1007 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1008 HOWTO (R_PPC64_PLTGOT16, /* type */
1009 0, /* rightshift */
1010 1, /* size (0 = byte, 1 = short, 2 = long) */
1011 16, /* bitsize */
1012 FALSE, /* pc_relative */
1013 0, /* bitpos */
1014 complain_overflow_signed, /* complain_on_overflow */
1015 ppc64_elf_unhandled_reloc, /* special_function */
1016 "R_PPC64_PLTGOT16", /* name */
1017 FALSE, /* partial_inplace */
1018 0, /* src_mask */
1019 0xffff, /* dst_mask */
1020 FALSE), /* pcrel_offset */
1021
1022 /* Like R_PPC64_PLTGOT16, but without overflow. */
1023 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1024 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1025 0, /* rightshift */
1026 1, /* size (0 = byte, 1 = short, 2 = long) */
1027 16, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 ppc64_elf_unhandled_reloc, /* special_function */
1032 "R_PPC64_PLTGOT16_LO", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 0xffff, /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1039 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1040 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1041 16, /* rightshift */
1042 1, /* size (0 = byte, 1 = short, 2 = long) */
1043 16, /* bitsize */
1044 FALSE, /* pc_relative */
1045 0, /* bitpos */
1046 complain_overflow_dont, /* complain_on_overflow */
1047 ppc64_elf_unhandled_reloc, /* special_function */
1048 "R_PPC64_PLTGOT16_HI", /* name */
1049 FALSE, /* partial_inplace */
1050 0, /* src_mask */
1051 0xffff, /* dst_mask */
1052 FALSE), /* pcrel_offset */
1053
1054 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1055 1 if the contents of the low 16 bits, treated as a signed number,
1056 is negative. */
1057 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1058 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1059 16, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_dont,/* complain_on_overflow */
1065 ppc64_elf_unhandled_reloc, /* special_function */
1066 "R_PPC64_PLTGOT16_HA", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1073 HOWTO (R_PPC64_ADDR16_DS, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_bitfield, /* complain_on_overflow */
1080 bfd_elf_generic_reloc, /* special_function */
1081 "R_PPC64_ADDR16_DS", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xfffc, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1088 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1089 0, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont,/* complain_on_overflow */
1095 bfd_elf_generic_reloc, /* special_function */
1096 "R_PPC64_ADDR16_LO_DS",/* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xfffc, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1103 HOWTO (R_PPC64_GOT16_DS, /* type */
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_signed, /* complain_on_overflow */
1110 ppc64_elf_unhandled_reloc, /* special_function */
1111 "R_PPC64_GOT16_DS", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xfffc, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1118 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_dont, /* complain_on_overflow */
1125 ppc64_elf_unhandled_reloc, /* special_function */
1126 "R_PPC64_GOT16_LO_DS", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xfffc, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1133 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1134 0, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_dont, /* complain_on_overflow */
1140 ppc64_elf_unhandled_reloc, /* special_function */
1141 "R_PPC64_PLT16_LO_DS", /* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xfffc, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1148 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1149 0, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_bitfield, /* complain_on_overflow */
1155 ppc64_elf_sectoff_reloc, /* special_function */
1156 "R_PPC64_SECTOFF_DS", /* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xfffc, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1163 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_dont, /* complain_on_overflow */
1170 ppc64_elf_sectoff_reloc, /* special_function */
1171 "R_PPC64_SECTOFF_LO_DS",/* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xfffc, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1178 HOWTO (R_PPC64_TOC16_DS, /* type */
1179 0, /* rightshift */
1180 1, /* size (0 = byte, 1 = short, 2 = long) */
1181 16, /* bitsize */
1182 FALSE, /* pc_relative */
1183 0, /* bitpos */
1184 complain_overflow_signed, /* complain_on_overflow */
1185 ppc64_elf_toc_reloc, /* special_function */
1186 "R_PPC64_TOC16_DS", /* name */
1187 FALSE, /* partial_inplace */
1188 0, /* src_mask */
1189 0xfffc, /* dst_mask */
1190 FALSE), /* pcrel_offset */
1191
1192 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1193 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1194 0, /* rightshift */
1195 1, /* size (0 = byte, 1 = short, 2 = long) */
1196 16, /* bitsize */
1197 FALSE, /* pc_relative */
1198 0, /* bitpos */
1199 complain_overflow_dont, /* complain_on_overflow */
1200 ppc64_elf_toc_reloc, /* special_function */
1201 "R_PPC64_TOC16_LO_DS", /* name */
1202 FALSE, /* partial_inplace */
1203 0, /* src_mask */
1204 0xfffc, /* dst_mask */
1205 FALSE), /* pcrel_offset */
1206
1207 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1208 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1209 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1210 0, /* rightshift */
1211 1, /* size (0 = byte, 1 = short, 2 = long) */
1212 16, /* bitsize */
1213 FALSE, /* pc_relative */
1214 0, /* bitpos */
1215 complain_overflow_signed, /* complain_on_overflow */
1216 ppc64_elf_unhandled_reloc, /* special_function */
1217 "R_PPC64_PLTGOT16_DS", /* name */
1218 FALSE, /* partial_inplace */
1219 0, /* src_mask */
1220 0xfffc, /* dst_mask */
1221 FALSE), /* pcrel_offset */
1222
1223 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1224 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1225 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1226 0, /* rightshift */
1227 1, /* size (0 = byte, 1 = short, 2 = long) */
1228 16, /* bitsize */
1229 FALSE, /* pc_relative */
1230 0, /* bitpos */
1231 complain_overflow_dont, /* complain_on_overflow */
1232 ppc64_elf_unhandled_reloc, /* special_function */
1233 "R_PPC64_PLTGOT16_LO_DS",/* name */
1234 FALSE, /* partial_inplace */
1235 0, /* src_mask */
1236 0xfffc, /* dst_mask */
1237 FALSE), /* pcrel_offset */
1238
1239 /* Marker relocs for TLS. */
1240 HOWTO (R_PPC64_TLS,
1241 0, /* rightshift */
1242 2, /* size (0 = byte, 1 = short, 2 = long) */
1243 32, /* bitsize */
1244 FALSE, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_dont, /* complain_on_overflow */
1247 bfd_elf_generic_reloc, /* special_function */
1248 "R_PPC64_TLS", /* name */
1249 FALSE, /* partial_inplace */
1250 0, /* src_mask */
1251 0, /* dst_mask */
1252 FALSE), /* pcrel_offset */
1253
1254 HOWTO (R_PPC64_TLSGD,
1255 0, /* rightshift */
1256 2, /* size (0 = byte, 1 = short, 2 = long) */
1257 32, /* bitsize */
1258 FALSE, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont, /* complain_on_overflow */
1261 bfd_elf_generic_reloc, /* special_function */
1262 "R_PPC64_TLSGD", /* name */
1263 FALSE, /* partial_inplace */
1264 0, /* src_mask */
1265 0, /* dst_mask */
1266 FALSE), /* pcrel_offset */
1267
1268 HOWTO (R_PPC64_TLSLD,
1269 0, /* rightshift */
1270 2, /* size (0 = byte, 1 = short, 2 = long) */
1271 32, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont, /* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 "R_PPC64_TLSLD", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0, /* dst_mask */
1280 FALSE), /* pcrel_offset */
1281
1282 /* Computes the load module index of the load module that contains the
1283 definition of its TLS sym. */
1284 HOWTO (R_PPC64_DTPMOD64,
1285 0, /* rightshift */
1286 4, /* size (0 = byte, 1 = short, 2 = long) */
1287 64, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_dont, /* complain_on_overflow */
1291 ppc64_elf_unhandled_reloc, /* special_function */
1292 "R_PPC64_DTPMOD64", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 ONES (64), /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 /* Computes a dtv-relative displacement, the difference between the value
1299 of sym+add and the base address of the thread-local storage block that
1300 contains the definition of sym, minus 0x8000. */
1301 HOWTO (R_PPC64_DTPREL64,
1302 0, /* rightshift */
1303 4, /* size (0 = byte, 1 = short, 2 = long) */
1304 64, /* bitsize */
1305 FALSE, /* pc_relative */
1306 0, /* bitpos */
1307 complain_overflow_dont, /* complain_on_overflow */
1308 ppc64_elf_unhandled_reloc, /* special_function */
1309 "R_PPC64_DTPREL64", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 ONES (64), /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* A 16 bit dtprel reloc. */
1316 HOWTO (R_PPC64_DTPREL16,
1317 0, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_signed, /* complain_on_overflow */
1323 ppc64_elf_unhandled_reloc, /* special_function */
1324 "R_PPC64_DTPREL16", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* Like DTPREL16, but no overflow. */
1331 HOWTO (R_PPC64_DTPREL16_LO,
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc64_elf_unhandled_reloc, /* special_function */
1339 "R_PPC64_DTPREL16_LO", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1346 HOWTO (R_PPC64_DTPREL16_HI,
1347 16, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_dont, /* complain_on_overflow */
1353 ppc64_elf_unhandled_reloc, /* special_function */
1354 "R_PPC64_DTPREL16_HI", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1361 HOWTO (R_PPC64_DTPREL16_HA,
1362 16, /* rightshift */
1363 1, /* size (0 = byte, 1 = short, 2 = long) */
1364 16, /* bitsize */
1365 FALSE, /* pc_relative */
1366 0, /* bitpos */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 ppc64_elf_unhandled_reloc, /* special_function */
1369 "R_PPC64_DTPREL16_HA", /* name */
1370 FALSE, /* partial_inplace */
1371 0, /* src_mask */
1372 0xffff, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1374
1375 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1376 HOWTO (R_PPC64_DTPREL16_HIGHER,
1377 32, /* rightshift */
1378 1, /* size (0 = byte, 1 = short, 2 = long) */
1379 16, /* bitsize */
1380 FALSE, /* pc_relative */
1381 0, /* bitpos */
1382 complain_overflow_dont, /* complain_on_overflow */
1383 ppc64_elf_unhandled_reloc, /* special_function */
1384 "R_PPC64_DTPREL16_HIGHER", /* name */
1385 FALSE, /* partial_inplace */
1386 0, /* src_mask */
1387 0xffff, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1389
1390 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1391 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1392 32, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_dont, /* complain_on_overflow */
1398 ppc64_elf_unhandled_reloc, /* special_function */
1399 "R_PPC64_DTPREL16_HIGHERA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1406 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1407 48, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 16, /* bitsize */
1410 FALSE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_dont, /* complain_on_overflow */
1413 ppc64_elf_unhandled_reloc, /* special_function */
1414 "R_PPC64_DTPREL16_HIGHEST", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xffff, /* dst_mask */
1418 FALSE), /* pcrel_offset */
1419
1420 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1421 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1422 48, /* rightshift */
1423 1, /* size (0 = byte, 1 = short, 2 = long) */
1424 16, /* bitsize */
1425 FALSE, /* pc_relative */
1426 0, /* bitpos */
1427 complain_overflow_dont, /* complain_on_overflow */
1428 ppc64_elf_unhandled_reloc, /* special_function */
1429 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xffff, /* dst_mask */
1433 FALSE), /* pcrel_offset */
1434
1435 /* Like DTPREL16, but for insns with a DS field. */
1436 HOWTO (R_PPC64_DTPREL16_DS,
1437 0, /* rightshift */
1438 1, /* size (0 = byte, 1 = short, 2 = long) */
1439 16, /* bitsize */
1440 FALSE, /* pc_relative */
1441 0, /* bitpos */
1442 complain_overflow_signed, /* complain_on_overflow */
1443 ppc64_elf_unhandled_reloc, /* special_function */
1444 "R_PPC64_DTPREL16_DS", /* name */
1445 FALSE, /* partial_inplace */
1446 0, /* src_mask */
1447 0xfffc, /* dst_mask */
1448 FALSE), /* pcrel_offset */
1449
1450 /* Like DTPREL16_DS, but no overflow. */
1451 HOWTO (R_PPC64_DTPREL16_LO_DS,
1452 0, /* rightshift */
1453 1, /* size (0 = byte, 1 = short, 2 = long) */
1454 16, /* bitsize */
1455 FALSE, /* pc_relative */
1456 0, /* bitpos */
1457 complain_overflow_dont, /* complain_on_overflow */
1458 ppc64_elf_unhandled_reloc, /* special_function */
1459 "R_PPC64_DTPREL16_LO_DS", /* name */
1460 FALSE, /* partial_inplace */
1461 0, /* src_mask */
1462 0xfffc, /* dst_mask */
1463 FALSE), /* pcrel_offset */
1464
1465 /* Computes a tp-relative displacement, the difference between the value of
1466 sym+add and the value of the thread pointer (r13). */
1467 HOWTO (R_PPC64_TPREL64,
1468 0, /* rightshift */
1469 4, /* size (0 = byte, 1 = short, 2 = long) */
1470 64, /* bitsize */
1471 FALSE, /* pc_relative */
1472 0, /* bitpos */
1473 complain_overflow_dont, /* complain_on_overflow */
1474 ppc64_elf_unhandled_reloc, /* special_function */
1475 "R_PPC64_TPREL64", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 ONES (64), /* dst_mask */
1479 FALSE), /* pcrel_offset */
1480
1481 /* A 16 bit tprel reloc. */
1482 HOWTO (R_PPC64_TPREL16,
1483 0, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_signed, /* complain_on_overflow */
1489 ppc64_elf_unhandled_reloc, /* special_function */
1490 "R_PPC64_TPREL16", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Like TPREL16, but no overflow. */
1497 HOWTO (R_PPC64_TPREL16_LO,
1498 0, /* rightshift */
1499 1, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc64_elf_unhandled_reloc, /* special_function */
1505 "R_PPC64_TPREL16_LO", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Like TPREL16_LO, but next higher group of 16 bits. */
1512 HOWTO (R_PPC64_TPREL16_HI,
1513 16, /* rightshift */
1514 1, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc64_elf_unhandled_reloc, /* special_function */
1520 "R_PPC64_TPREL16_HI", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Like TPREL16_HI, but adjust for low 16 bits. */
1527 HOWTO (R_PPC64_TPREL16_HA,
1528 16, /* rightshift */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc64_elf_unhandled_reloc, /* special_function */
1535 "R_PPC64_TPREL16_HA", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0xffff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Like TPREL16_HI, but next higher group of 16 bits. */
1542 HOWTO (R_PPC64_TPREL16_HIGHER,
1543 32, /* rightshift */
1544 1, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc64_elf_unhandled_reloc, /* special_function */
1550 "R_PPC64_TPREL16_HIGHER", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0xffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1557 HOWTO (R_PPC64_TPREL16_HIGHERA,
1558 32, /* rightshift */
1559 1, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc64_elf_unhandled_reloc, /* special_function */
1565 "R_PPC64_TPREL16_HIGHERA", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0xffff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1572 HOWTO (R_PPC64_TPREL16_HIGHEST,
1573 48, /* rightshift */
1574 1, /* size (0 = byte, 1 = short, 2 = long) */
1575 16, /* bitsize */
1576 FALSE, /* pc_relative */
1577 0, /* bitpos */
1578 complain_overflow_dont, /* complain_on_overflow */
1579 ppc64_elf_unhandled_reloc, /* special_function */
1580 "R_PPC64_TPREL16_HIGHEST", /* name */
1581 FALSE, /* partial_inplace */
1582 0, /* src_mask */
1583 0xffff, /* dst_mask */
1584 FALSE), /* pcrel_offset */
1585
1586 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1587 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1588 48, /* rightshift */
1589 1, /* size (0 = byte, 1 = short, 2 = long) */
1590 16, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_dont, /* complain_on_overflow */
1594 ppc64_elf_unhandled_reloc, /* special_function */
1595 "R_PPC64_TPREL16_HIGHESTA", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0xffff, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Like TPREL16, but for insns with a DS field. */
1602 HOWTO (R_PPC64_TPREL16_DS,
1603 0, /* rightshift */
1604 1, /* size (0 = byte, 1 = short, 2 = long) */
1605 16, /* bitsize */
1606 FALSE, /* pc_relative */
1607 0, /* bitpos */
1608 complain_overflow_signed, /* complain_on_overflow */
1609 ppc64_elf_unhandled_reloc, /* special_function */
1610 "R_PPC64_TPREL16_DS", /* name */
1611 FALSE, /* partial_inplace */
1612 0, /* src_mask */
1613 0xfffc, /* dst_mask */
1614 FALSE), /* pcrel_offset */
1615
1616 /* Like TPREL16_DS, but no overflow. */
1617 HOWTO (R_PPC64_TPREL16_LO_DS,
1618 0, /* rightshift */
1619 1, /* size (0 = byte, 1 = short, 2 = long) */
1620 16, /* bitsize */
1621 FALSE, /* pc_relative */
1622 0, /* bitpos */
1623 complain_overflow_dont, /* complain_on_overflow */
1624 ppc64_elf_unhandled_reloc, /* special_function */
1625 "R_PPC64_TPREL16_LO_DS", /* name */
1626 FALSE, /* partial_inplace */
1627 0, /* src_mask */
1628 0xfffc, /* dst_mask */
1629 FALSE), /* pcrel_offset */
1630
1631 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1632 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1633 to the first entry relative to the TOC base (r2). */
1634 HOWTO (R_PPC64_GOT_TLSGD16,
1635 0, /* rightshift */
1636 1, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_signed, /* complain_on_overflow */
1641 ppc64_elf_unhandled_reloc, /* special_function */
1642 "R_PPC64_GOT_TLSGD16", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0xffff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Like GOT_TLSGD16, but no overflow. */
1649 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1650 0, /* rightshift */
1651 1, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc64_elf_unhandled_reloc, /* special_function */
1657 "R_PPC64_GOT_TLSGD16_LO", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0xffff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1664 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1665 16, /* rightshift */
1666 1, /* size (0 = byte, 1 = short, 2 = long) */
1667 16, /* bitsize */
1668 FALSE, /* pc_relative */
1669 0, /* bitpos */
1670 complain_overflow_dont, /* complain_on_overflow */
1671 ppc64_elf_unhandled_reloc, /* special_function */
1672 "R_PPC64_GOT_TLSGD16_HI", /* name */
1673 FALSE, /* partial_inplace */
1674 0, /* src_mask */
1675 0xffff, /* dst_mask */
1676 FALSE), /* pcrel_offset */
1677
1678 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1679 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1680 16, /* rightshift */
1681 1, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc64_elf_unhandled_reloc, /* special_function */
1687 "R_PPC64_GOT_TLSGD16_HA", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0xffff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1694 with values (sym+add)@dtpmod and zero, and computes the offset to the
1695 first entry relative to the TOC base (r2). */
1696 HOWTO (R_PPC64_GOT_TLSLD16,
1697 0, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_signed, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_TLSLD16", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xffff, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Like GOT_TLSLD16, but no overflow. */
1711 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1712 0, /* rightshift */
1713 1, /* size (0 = byte, 1 = short, 2 = long) */
1714 16, /* bitsize */
1715 FALSE, /* pc_relative */
1716 0, /* bitpos */
1717 complain_overflow_dont, /* complain_on_overflow */
1718 ppc64_elf_unhandled_reloc, /* special_function */
1719 "R_PPC64_GOT_TLSLD16_LO", /* name */
1720 FALSE, /* partial_inplace */
1721 0, /* src_mask */
1722 0xffff, /* dst_mask */
1723 FALSE), /* pcrel_offset */
1724
1725 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1726 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1727 16, /* rightshift */
1728 1, /* size (0 = byte, 1 = short, 2 = long) */
1729 16, /* bitsize */
1730 FALSE, /* pc_relative */
1731 0, /* bitpos */
1732 complain_overflow_dont, /* complain_on_overflow */
1733 ppc64_elf_unhandled_reloc, /* special_function */
1734 "R_PPC64_GOT_TLSLD16_HI", /* name */
1735 FALSE, /* partial_inplace */
1736 0, /* src_mask */
1737 0xffff, /* dst_mask */
1738 FALSE), /* pcrel_offset */
1739
1740 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1741 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1742 16, /* rightshift */
1743 1, /* size (0 = byte, 1 = short, 2 = long) */
1744 16, /* bitsize */
1745 FALSE, /* pc_relative */
1746 0, /* bitpos */
1747 complain_overflow_dont, /* complain_on_overflow */
1748 ppc64_elf_unhandled_reloc, /* special_function */
1749 "R_PPC64_GOT_TLSLD16_HA", /* name */
1750 FALSE, /* partial_inplace */
1751 0, /* src_mask */
1752 0xffff, /* dst_mask */
1753 FALSE), /* pcrel_offset */
1754
1755 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1756 the offset to the entry relative to the TOC base (r2). */
1757 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1758 0, /* rightshift */
1759 1, /* size (0 = byte, 1 = short, 2 = long) */
1760 16, /* bitsize */
1761 FALSE, /* pc_relative */
1762 0, /* bitpos */
1763 complain_overflow_signed, /* complain_on_overflow */
1764 ppc64_elf_unhandled_reloc, /* special_function */
1765 "R_PPC64_GOT_DTPREL16_DS", /* name */
1766 FALSE, /* partial_inplace */
1767 0, /* src_mask */
1768 0xfffc, /* dst_mask */
1769 FALSE), /* pcrel_offset */
1770
1771 /* Like GOT_DTPREL16_DS, but no overflow. */
1772 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1773 0, /* rightshift */
1774 1, /* size (0 = byte, 1 = short, 2 = long) */
1775 16, /* bitsize */
1776 FALSE, /* pc_relative */
1777 0, /* bitpos */
1778 complain_overflow_dont, /* complain_on_overflow */
1779 ppc64_elf_unhandled_reloc, /* special_function */
1780 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1781 FALSE, /* partial_inplace */
1782 0, /* src_mask */
1783 0xfffc, /* dst_mask */
1784 FALSE), /* pcrel_offset */
1785
1786 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1787 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1788 16, /* rightshift */
1789 1, /* size (0 = byte, 1 = short, 2 = long) */
1790 16, /* bitsize */
1791 FALSE, /* pc_relative */
1792 0, /* bitpos */
1793 complain_overflow_dont, /* complain_on_overflow */
1794 ppc64_elf_unhandled_reloc, /* special_function */
1795 "R_PPC64_GOT_DTPREL16_HI", /* name */
1796 FALSE, /* partial_inplace */
1797 0, /* src_mask */
1798 0xffff, /* dst_mask */
1799 FALSE), /* pcrel_offset */
1800
1801 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1802 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1803 16, /* rightshift */
1804 1, /* size (0 = byte, 1 = short, 2 = long) */
1805 16, /* bitsize */
1806 FALSE, /* pc_relative */
1807 0, /* bitpos */
1808 complain_overflow_dont, /* complain_on_overflow */
1809 ppc64_elf_unhandled_reloc, /* special_function */
1810 "R_PPC64_GOT_DTPREL16_HA", /* name */
1811 FALSE, /* partial_inplace */
1812 0, /* src_mask */
1813 0xffff, /* dst_mask */
1814 FALSE), /* pcrel_offset */
1815
1816 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1817 offset to the entry relative to the TOC base (r2). */
1818 HOWTO (R_PPC64_GOT_TPREL16_DS,
1819 0, /* rightshift */
1820 1, /* size (0 = byte, 1 = short, 2 = long) */
1821 16, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_signed, /* complain_on_overflow */
1825 ppc64_elf_unhandled_reloc, /* special_function */
1826 "R_PPC64_GOT_TPREL16_DS", /* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0xfffc, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831
1832 /* Like GOT_TPREL16_DS, but no overflow. */
1833 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1834 0, /* rightshift */
1835 1, /* size (0 = byte, 1 = short, 2 = long) */
1836 16, /* bitsize */
1837 FALSE, /* pc_relative */
1838 0, /* bitpos */
1839 complain_overflow_dont, /* complain_on_overflow */
1840 ppc64_elf_unhandled_reloc, /* special_function */
1841 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1842 FALSE, /* partial_inplace */
1843 0, /* src_mask */
1844 0xfffc, /* dst_mask */
1845 FALSE), /* pcrel_offset */
1846
1847 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1848 HOWTO (R_PPC64_GOT_TPREL16_HI,
1849 16, /* rightshift */
1850 1, /* size (0 = byte, 1 = short, 2 = long) */
1851 16, /* bitsize */
1852 FALSE, /* pc_relative */
1853 0, /* bitpos */
1854 complain_overflow_dont, /* complain_on_overflow */
1855 ppc64_elf_unhandled_reloc, /* special_function */
1856 "R_PPC64_GOT_TPREL16_HI", /* name */
1857 FALSE, /* partial_inplace */
1858 0, /* src_mask */
1859 0xffff, /* dst_mask */
1860 FALSE), /* pcrel_offset */
1861
1862 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1863 HOWTO (R_PPC64_GOT_TPREL16_HA,
1864 16, /* rightshift */
1865 1, /* size (0 = byte, 1 = short, 2 = long) */
1866 16, /* bitsize */
1867 FALSE, /* pc_relative */
1868 0, /* bitpos */
1869 complain_overflow_dont, /* complain_on_overflow */
1870 ppc64_elf_unhandled_reloc, /* special_function */
1871 "R_PPC64_GOT_TPREL16_HA", /* name */
1872 FALSE, /* partial_inplace */
1873 0, /* src_mask */
1874 0xffff, /* dst_mask */
1875 FALSE), /* pcrel_offset */
1876
1877 HOWTO (R_PPC64_JMP_IREL, /* type */
1878 0, /* rightshift */
1879 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1880 0, /* bitsize */
1881 FALSE, /* pc_relative */
1882 0, /* bitpos */
1883 complain_overflow_dont, /* complain_on_overflow */
1884 ppc64_elf_unhandled_reloc, /* special_function */
1885 "R_PPC64_JMP_IREL", /* name */
1886 FALSE, /* partial_inplace */
1887 0, /* src_mask */
1888 0, /* dst_mask */
1889 FALSE), /* pcrel_offset */
1890
1891 HOWTO (R_PPC64_IRELATIVE, /* type */
1892 0, /* rightshift */
1893 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1894 64, /* bitsize */
1895 FALSE, /* pc_relative */
1896 0, /* bitpos */
1897 complain_overflow_dont, /* complain_on_overflow */
1898 bfd_elf_generic_reloc, /* special_function */
1899 "R_PPC64_IRELATIVE", /* name */
1900 FALSE, /* partial_inplace */
1901 0, /* src_mask */
1902 ONES (64), /* dst_mask */
1903 FALSE), /* pcrel_offset */
1904
1905 /* A 16 bit relative relocation. */
1906 HOWTO (R_PPC64_REL16, /* type */
1907 0, /* rightshift */
1908 1, /* size (0 = byte, 1 = short, 2 = long) */
1909 16, /* bitsize */
1910 TRUE, /* pc_relative */
1911 0, /* bitpos */
1912 complain_overflow_bitfield, /* complain_on_overflow */
1913 bfd_elf_generic_reloc, /* special_function */
1914 "R_PPC64_REL16", /* name */
1915 FALSE, /* partial_inplace */
1916 0, /* src_mask */
1917 0xffff, /* dst_mask */
1918 TRUE), /* pcrel_offset */
1919
1920 /* A 16 bit relative relocation without overflow. */
1921 HOWTO (R_PPC64_REL16_LO, /* type */
1922 0, /* rightshift */
1923 1, /* size (0 = byte, 1 = short, 2 = long) */
1924 16, /* bitsize */
1925 TRUE, /* pc_relative */
1926 0, /* bitpos */
1927 complain_overflow_dont,/* complain_on_overflow */
1928 bfd_elf_generic_reloc, /* special_function */
1929 "R_PPC64_REL16_LO", /* name */
1930 FALSE, /* partial_inplace */
1931 0, /* src_mask */
1932 0xffff, /* dst_mask */
1933 TRUE), /* pcrel_offset */
1934
1935 /* The high order 16 bits of a relative address. */
1936 HOWTO (R_PPC64_REL16_HI, /* type */
1937 16, /* rightshift */
1938 1, /* size (0 = byte, 1 = short, 2 = long) */
1939 16, /* bitsize */
1940 TRUE, /* pc_relative */
1941 0, /* bitpos */
1942 complain_overflow_dont, /* complain_on_overflow */
1943 bfd_elf_generic_reloc, /* special_function */
1944 "R_PPC64_REL16_HI", /* name */
1945 FALSE, /* partial_inplace */
1946 0, /* src_mask */
1947 0xffff, /* dst_mask */
1948 TRUE), /* pcrel_offset */
1949
1950 /* The high order 16 bits of a relative address, plus 1 if the contents of
1951 the low 16 bits, treated as a signed number, is negative. */
1952 HOWTO (R_PPC64_REL16_HA, /* type */
1953 16, /* rightshift */
1954 1, /* size (0 = byte, 1 = short, 2 = long) */
1955 16, /* bitsize */
1956 TRUE, /* pc_relative */
1957 0, /* bitpos */
1958 complain_overflow_dont, /* complain_on_overflow */
1959 ppc64_elf_ha_reloc, /* special_function */
1960 "R_PPC64_REL16_HA", /* name */
1961 FALSE, /* partial_inplace */
1962 0, /* src_mask */
1963 0xffff, /* dst_mask */
1964 TRUE), /* pcrel_offset */
1965
1966 /* GNU extension to record C++ vtable hierarchy. */
1967 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1968 0, /* rightshift */
1969 0, /* size (0 = byte, 1 = short, 2 = long) */
1970 0, /* bitsize */
1971 FALSE, /* pc_relative */
1972 0, /* bitpos */
1973 complain_overflow_dont, /* complain_on_overflow */
1974 NULL, /* special_function */
1975 "R_PPC64_GNU_VTINHERIT", /* name */
1976 FALSE, /* partial_inplace */
1977 0, /* src_mask */
1978 0, /* dst_mask */
1979 FALSE), /* pcrel_offset */
1980
1981 /* GNU extension to record C++ vtable member usage. */
1982 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1983 0, /* rightshift */
1984 0, /* size (0 = byte, 1 = short, 2 = long) */
1985 0, /* bitsize */
1986 FALSE, /* pc_relative */
1987 0, /* bitpos */
1988 complain_overflow_dont, /* complain_on_overflow */
1989 NULL, /* special_function */
1990 "R_PPC64_GNU_VTENTRY", /* name */
1991 FALSE, /* partial_inplace */
1992 0, /* src_mask */
1993 0, /* dst_mask */
1994 FALSE), /* pcrel_offset */
1995 };
1996
1997 \f
1998 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1999 be done. */
2000
2001 static void
2002 ppc_howto_init (void)
2003 {
2004 unsigned int i, type;
2005
2006 for (i = 0;
2007 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2008 i++)
2009 {
2010 type = ppc64_elf_howto_raw[i].type;
2011 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2012 / sizeof (ppc64_elf_howto_table[0])));
2013 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2014 }
2015 }
2016
2017 static reloc_howto_type *
2018 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2019 bfd_reloc_code_real_type code)
2020 {
2021 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2022
2023 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2024 /* Initialize howto table if needed. */
2025 ppc_howto_init ();
2026
2027 switch (code)
2028 {
2029 default:
2030 return NULL;
2031
2032 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2033 break;
2034 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2035 break;
2036 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2037 break;
2038 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2039 break;
2040 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2041 break;
2042 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2043 break;
2044 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2045 break;
2046 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2047 break;
2048 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2049 break;
2050 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2051 break;
2052 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2053 break;
2054 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2055 break;
2056 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2057 break;
2058 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2059 break;
2060 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2061 break;
2062 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2063 break;
2064 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2065 break;
2066 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2067 break;
2068 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2069 break;
2070 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2071 break;
2072 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2073 break;
2074 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2075 break;
2076 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2077 break;
2078 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2079 break;
2080 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2081 break;
2082 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2083 break;
2084 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2085 break;
2086 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2087 break;
2088 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2089 break;
2090 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2091 break;
2092 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2093 break;
2094 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2095 break;
2096 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2097 break;
2098 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2099 break;
2100 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2101 break;
2102 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2103 break;
2104 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2105 break;
2106 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2107 break;
2108 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2109 break;
2110 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2111 break;
2112 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2113 break;
2114 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2115 break;
2116 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2117 break;
2118 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2119 break;
2120 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2121 break;
2122 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2123 break;
2124 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2125 break;
2126 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2127 break;
2128 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2129 break;
2130 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2131 break;
2132 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2133 break;
2134 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2135 break;
2136 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2137 break;
2138 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2139 break;
2140 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2141 break;
2142 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2143 break;
2144 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2145 break;
2146 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2147 break;
2148 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2149 break;
2150 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2151 break;
2152 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2153 break;
2154 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2155 break;
2156 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2157 break;
2158 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2159 break;
2160 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2161 break;
2162 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2163 break;
2164 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2165 break;
2166 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2167 break;
2168 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2169 break;
2170 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2171 break;
2172 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2173 break;
2174 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2175 break;
2176 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2177 break;
2178 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2179 break;
2180 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2181 break;
2182 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2183 break;
2184 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2185 break;
2186 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2187 break;
2188 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2189 break;
2190 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2191 break;
2192 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2193 break;
2194 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2195 break;
2196 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2197 break;
2198 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2199 break;
2200 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2201 break;
2202 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2203 break;
2204 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2205 break;
2206 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2207 break;
2208 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2209 break;
2210 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2211 break;
2212 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2213 break;
2214 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2215 break;
2216 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2217 break;
2218 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2219 break;
2220 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2221 break;
2222 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2223 break;
2224 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2225 break;
2226 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2227 break;
2228 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2229 break;
2230 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2231 break;
2232 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2233 break;
2234 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2235 break;
2236 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2237 break;
2238 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2239 break;
2240 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2241 break;
2242 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2243 break;
2244 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2245 break;
2246 }
2247
2248 return ppc64_elf_howto_table[r];
2249 };
2250
2251 static reloc_howto_type *
2252 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2253 const char *r_name)
2254 {
2255 unsigned int i;
2256
2257 for (i = 0;
2258 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2259 i++)
2260 if (ppc64_elf_howto_raw[i].name != NULL
2261 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2262 return &ppc64_elf_howto_raw[i];
2263
2264 return NULL;
2265 }
2266
2267 /* Set the howto pointer for a PowerPC ELF reloc. */
2268
2269 static void
2270 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2271 Elf_Internal_Rela *dst)
2272 {
2273 unsigned int type;
2274
2275 /* Initialize howto table if needed. */
2276 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2277 ppc_howto_init ();
2278
2279 type = ELF64_R_TYPE (dst->r_info);
2280 if (type >= (sizeof (ppc64_elf_howto_table)
2281 / sizeof (ppc64_elf_howto_table[0])))
2282 {
2283 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2284 abfd, (int) type);
2285 type = R_PPC64_NONE;
2286 }
2287 cache_ptr->howto = ppc64_elf_howto_table[type];
2288 }
2289
2290 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2291
2292 static bfd_reloc_status_type
2293 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2294 void *data, asection *input_section,
2295 bfd *output_bfd, char **error_message)
2296 {
2297 /* If this is a relocatable link (output_bfd test tells us), just
2298 call the generic function. Any adjustment will be done at final
2299 link time. */
2300 if (output_bfd != NULL)
2301 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2302 input_section, output_bfd, error_message);
2303
2304 /* Adjust the addend for sign extension of the low 16 bits.
2305 We won't actually be using the low 16 bits, so trashing them
2306 doesn't matter. */
2307 reloc_entry->addend += 0x8000;
2308 return bfd_reloc_continue;
2309 }
2310
2311 static bfd_reloc_status_type
2312 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2313 void *data, asection *input_section,
2314 bfd *output_bfd, char **error_message)
2315 {
2316 if (output_bfd != NULL)
2317 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2318 input_section, output_bfd, error_message);
2319
2320 if (strcmp (symbol->section->name, ".opd") == 0
2321 && (symbol->section->owner->flags & DYNAMIC) == 0)
2322 {
2323 bfd_vma dest = opd_entry_value (symbol->section,
2324 symbol->value + reloc_entry->addend,
2325 NULL, NULL);
2326 if (dest != (bfd_vma) -1)
2327 reloc_entry->addend = dest - (symbol->value
2328 + symbol->section->output_section->vma
2329 + symbol->section->output_offset);
2330 }
2331 return bfd_reloc_continue;
2332 }
2333
2334 static bfd_reloc_status_type
2335 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2336 void *data, asection *input_section,
2337 bfd *output_bfd, char **error_message)
2338 {
2339 long insn;
2340 enum elf_ppc64_reloc_type r_type;
2341 bfd_size_type octets;
2342 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2343 bfd_boolean is_power4 = FALSE;
2344
2345 /* If this is a relocatable link (output_bfd test tells us), just
2346 call the generic function. Any adjustment will be done at final
2347 link time. */
2348 if (output_bfd != NULL)
2349 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2350 input_section, output_bfd, error_message);
2351
2352 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2353 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2354 insn &= ~(0x01 << 21);
2355 r_type = reloc_entry->howto->type;
2356 if (r_type == R_PPC64_ADDR14_BRTAKEN
2357 || r_type == R_PPC64_REL14_BRTAKEN)
2358 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2359
2360 if (is_power4)
2361 {
2362 /* Set 'a' bit. This is 0b00010 in BO field for branch
2363 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2364 for branch on CTR insns (BO == 1a00t or 1a01t). */
2365 if ((insn & (0x14 << 21)) == (0x04 << 21))
2366 insn |= 0x02 << 21;
2367 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2368 insn |= 0x08 << 21;
2369 else
2370 goto out;
2371 }
2372 else
2373 {
2374 bfd_vma target = 0;
2375 bfd_vma from;
2376
2377 if (!bfd_is_com_section (symbol->section))
2378 target = symbol->value;
2379 target += symbol->section->output_section->vma;
2380 target += symbol->section->output_offset;
2381 target += reloc_entry->addend;
2382
2383 from = (reloc_entry->address
2384 + input_section->output_offset
2385 + input_section->output_section->vma);
2386
2387 /* Invert 'y' bit if not the default. */
2388 if ((bfd_signed_vma) (target - from) < 0)
2389 insn ^= 0x01 << 21;
2390 }
2391 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2392 out:
2393 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2394 input_section, output_bfd, error_message);
2395 }
2396
2397 static bfd_reloc_status_type
2398 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2399 void *data, asection *input_section,
2400 bfd *output_bfd, char **error_message)
2401 {
2402 /* If this is a relocatable link (output_bfd test tells us), just
2403 call the generic function. Any adjustment will be done at final
2404 link time. */
2405 if (output_bfd != NULL)
2406 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2407 input_section, output_bfd, error_message);
2408
2409 /* Subtract the symbol section base address. */
2410 reloc_entry->addend -= symbol->section->output_section->vma;
2411 return bfd_reloc_continue;
2412 }
2413
2414 static bfd_reloc_status_type
2415 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2416 void *data, asection *input_section,
2417 bfd *output_bfd, char **error_message)
2418 {
2419 /* If this is a relocatable link (output_bfd test tells us), just
2420 call the generic function. Any adjustment will be done at final
2421 link time. */
2422 if (output_bfd != NULL)
2423 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2424 input_section, output_bfd, error_message);
2425
2426 /* Subtract the symbol section base address. */
2427 reloc_entry->addend -= symbol->section->output_section->vma;
2428
2429 /* Adjust the addend for sign extension of the low 16 bits. */
2430 reloc_entry->addend += 0x8000;
2431 return bfd_reloc_continue;
2432 }
2433
2434 static bfd_reloc_status_type
2435 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2436 void *data, asection *input_section,
2437 bfd *output_bfd, char **error_message)
2438 {
2439 bfd_vma TOCstart;
2440
2441 /* If this is a relocatable link (output_bfd test tells us), just
2442 call the generic function. Any adjustment will be done at final
2443 link time. */
2444 if (output_bfd != NULL)
2445 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2446 input_section, output_bfd, error_message);
2447
2448 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2449 if (TOCstart == 0)
2450 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2451
2452 /* Subtract the TOC base address. */
2453 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2454 return bfd_reloc_continue;
2455 }
2456
2457 static bfd_reloc_status_type
2458 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2459 void *data, asection *input_section,
2460 bfd *output_bfd, char **error_message)
2461 {
2462 bfd_vma TOCstart;
2463
2464 /* If this is a relocatable link (output_bfd test tells us), just
2465 call the generic function. Any adjustment will be done at final
2466 link time. */
2467 if (output_bfd != NULL)
2468 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2469 input_section, output_bfd, error_message);
2470
2471 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2472 if (TOCstart == 0)
2473 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2474
2475 /* Subtract the TOC base address. */
2476 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2477
2478 /* Adjust the addend for sign extension of the low 16 bits. */
2479 reloc_entry->addend += 0x8000;
2480 return bfd_reloc_continue;
2481 }
2482
2483 static bfd_reloc_status_type
2484 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2485 void *data, asection *input_section,
2486 bfd *output_bfd, char **error_message)
2487 {
2488 bfd_vma TOCstart;
2489 bfd_size_type octets;
2490
2491 /* If this is a relocatable link (output_bfd test tells us), just
2492 call the generic function. Any adjustment will be done at final
2493 link time. */
2494 if (output_bfd != NULL)
2495 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2496 input_section, output_bfd, error_message);
2497
2498 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2499 if (TOCstart == 0)
2500 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2501
2502 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2503 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2504 return bfd_reloc_ok;
2505 }
2506
2507 static bfd_reloc_status_type
2508 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2509 void *data, asection *input_section,
2510 bfd *output_bfd, char **error_message)
2511 {
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 if (error_message != NULL)
2520 {
2521 static char buf[60];
2522 sprintf (buf, "generic linker can't handle %s",
2523 reloc_entry->howto->name);
2524 *error_message = buf;
2525 }
2526 return bfd_reloc_dangerous;
2527 }
2528
2529 struct ppc64_elf_obj_tdata
2530 {
2531 struct elf_obj_tdata elf;
2532
2533 /* Shortcuts to dynamic linker sections. */
2534 asection *got;
2535 asection *relgot;
2536
2537 /* Used during garbage collection. We attach global symbols defined
2538 on removed .opd entries to this section so that the sym is removed. */
2539 asection *deleted_section;
2540
2541 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2542 sections means we potentially need one of these for each input bfd. */
2543 union {
2544 bfd_signed_vma refcount;
2545 bfd_vma offset;
2546 } tlsld_got;
2547
2548 /* A copy of relocs before they are modified for --emit-relocs. */
2549 Elf_Internal_Rela *opd_relocs;
2550 };
2551
2552 #define ppc64_elf_tdata(bfd) \
2553 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2554
2555 #define ppc64_tlsld_got(bfd) \
2556 (&ppc64_elf_tdata (bfd)->tlsld_got)
2557
2558 #define is_ppc64_elf(bfd) \
2559 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2560 && elf_object_id (bfd) == PPC64_ELF_TDATA)
2561
2562 /* Override the generic function because we store some extras. */
2563
2564 static bfd_boolean
2565 ppc64_elf_mkobject (bfd *abfd)
2566 {
2567 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2568 PPC64_ELF_TDATA);
2569 }
2570
2571 /* Fix bad default arch selected for a 64 bit input bfd when the
2572 default is 32 bit. */
2573
2574 static bfd_boolean
2575 ppc64_elf_object_p (bfd *abfd)
2576 {
2577 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2578 {
2579 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2580
2581 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2582 {
2583 /* Relies on arch after 32 bit default being 64 bit default. */
2584 abfd->arch_info = abfd->arch_info->next;
2585 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2586 }
2587 }
2588 return TRUE;
2589 }
2590
2591 /* Support for core dump NOTE sections. */
2592
2593 static bfd_boolean
2594 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2595 {
2596 size_t offset, size;
2597
2598 if (note->descsz != 504)
2599 return FALSE;
2600
2601 /* pr_cursig */
2602 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2603
2604 /* pr_pid */
2605 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2606
2607 /* pr_reg */
2608 offset = 112;
2609 size = 384;
2610
2611 /* Make a ".reg/999" section. */
2612 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2613 size, note->descpos + offset);
2614 }
2615
2616 static bfd_boolean
2617 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2618 {
2619 if (note->descsz != 136)
2620 return FALSE;
2621
2622 elf_tdata (abfd)->core_program
2623 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2624 elf_tdata (abfd)->core_command
2625 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2626
2627 return TRUE;
2628 }
2629
2630 static char *
2631 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2632 ...)
2633 {
2634 switch (note_type)
2635 {
2636 default:
2637 return NULL;
2638
2639 case NT_PRPSINFO:
2640 {
2641 char data[136];
2642 va_list ap;
2643
2644 va_start (ap, note_type);
2645 memset (data, 0, 40);
2646 strncpy (data + 40, va_arg (ap, const char *), 16);
2647 strncpy (data + 56, va_arg (ap, const char *), 80);
2648 va_end (ap);
2649 return elfcore_write_note (abfd, buf, bufsiz,
2650 "CORE", note_type, data, sizeof (data));
2651 }
2652
2653 case NT_PRSTATUS:
2654 {
2655 char data[504];
2656 va_list ap;
2657 long pid;
2658 int cursig;
2659 const void *greg;
2660
2661 va_start (ap, note_type);
2662 memset (data, 0, 112);
2663 pid = va_arg (ap, long);
2664 bfd_put_32 (abfd, pid, data + 32);
2665 cursig = va_arg (ap, int);
2666 bfd_put_16 (abfd, cursig, data + 12);
2667 greg = va_arg (ap, const void *);
2668 memcpy (data + 112, greg, 384);
2669 memset (data + 496, 0, 8);
2670 va_end (ap);
2671 return elfcore_write_note (abfd, buf, bufsiz,
2672 "CORE", note_type, data, sizeof (data));
2673 }
2674 }
2675 }
2676
2677 /* Merge backend specific data from an object file to the output
2678 object file when linking. */
2679
2680 static bfd_boolean
2681 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2682 {
2683 /* Check if we have the same endianess. */
2684 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2685 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2686 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2687 {
2688 const char *msg;
2689
2690 if (bfd_big_endian (ibfd))
2691 msg = _("%B: compiled for a big endian system "
2692 "and target is little endian");
2693 else
2694 msg = _("%B: compiled for a little endian system "
2695 "and target is big endian");
2696
2697 (*_bfd_error_handler) (msg, ibfd);
2698
2699 bfd_set_error (bfd_error_wrong_format);
2700 return FALSE;
2701 }
2702
2703 return TRUE;
2704 }
2705
2706 /* Add extra PPC sections. */
2707
2708 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2709 {
2710 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2711 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2712 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2713 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2714 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2715 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2716 { NULL, 0, 0, 0, 0 }
2717 };
2718
2719 enum _ppc64_sec_type {
2720 sec_normal = 0,
2721 sec_opd = 1,
2722 sec_toc = 2
2723 };
2724
2725 struct _ppc64_elf_section_data
2726 {
2727 struct bfd_elf_section_data elf;
2728
2729 union
2730 {
2731 /* An array with one entry for each opd function descriptor. */
2732 struct _opd_sec_data
2733 {
2734 /* Points to the function code section for local opd entries. */
2735 asection **func_sec;
2736
2737 /* After editing .opd, adjust references to opd local syms. */
2738 long *adjust;
2739 } opd;
2740
2741 /* An array for toc sections, indexed by offset/8. */
2742 struct _toc_sec_data
2743 {
2744 /* Specifies the relocation symbol index used at a given toc offset. */
2745 unsigned *symndx;
2746
2747 /* And the relocation addend. */
2748 bfd_vma *add;
2749 } toc;
2750 } u;
2751
2752 enum _ppc64_sec_type sec_type:2;
2753
2754 /* Flag set when small branches are detected. Used to
2755 select suitable defaults for the stub group size. */
2756 unsigned int has_14bit_branch:1;
2757 };
2758
2759 #define ppc64_elf_section_data(sec) \
2760 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2761
2762 static bfd_boolean
2763 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2764 {
2765 if (!sec->used_by_bfd)
2766 {
2767 struct _ppc64_elf_section_data *sdata;
2768 bfd_size_type amt = sizeof (*sdata);
2769
2770 sdata = bfd_zalloc (abfd, amt);
2771 if (sdata == NULL)
2772 return FALSE;
2773 sec->used_by_bfd = sdata;
2774 }
2775
2776 return _bfd_elf_new_section_hook (abfd, sec);
2777 }
2778
2779 static struct _opd_sec_data *
2780 get_opd_info (asection * sec)
2781 {
2782 if (sec != NULL
2783 && ppc64_elf_section_data (sec) != NULL
2784 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2785 return &ppc64_elf_section_data (sec)->u.opd;
2786 return NULL;
2787 }
2788 \f
2789 /* Parameters for the qsort hook. */
2790 static bfd_boolean synthetic_relocatable;
2791
2792 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2793
2794 static int
2795 compare_symbols (const void *ap, const void *bp)
2796 {
2797 const asymbol *a = * (const asymbol **) ap;
2798 const asymbol *b = * (const asymbol **) bp;
2799
2800 /* Section symbols first. */
2801 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2802 return -1;
2803 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2804 return 1;
2805
2806 /* then .opd symbols. */
2807 if (strcmp (a->section->name, ".opd") == 0
2808 && strcmp (b->section->name, ".opd") != 0)
2809 return -1;
2810 if (strcmp (a->section->name, ".opd") != 0
2811 && strcmp (b->section->name, ".opd") == 0)
2812 return 1;
2813
2814 /* then other code symbols. */
2815 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2816 == (SEC_CODE | SEC_ALLOC)
2817 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2818 != (SEC_CODE | SEC_ALLOC))
2819 return -1;
2820
2821 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2822 != (SEC_CODE | SEC_ALLOC)
2823 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2824 == (SEC_CODE | SEC_ALLOC))
2825 return 1;
2826
2827 if (synthetic_relocatable)
2828 {
2829 if (a->section->id < b->section->id)
2830 return -1;
2831
2832 if (a->section->id > b->section->id)
2833 return 1;
2834 }
2835
2836 if (a->value + a->section->vma < b->value + b->section->vma)
2837 return -1;
2838
2839 if (a->value + a->section->vma > b->value + b->section->vma)
2840 return 1;
2841
2842 /* For syms with the same value, prefer strong dynamic global function
2843 syms over other syms. */
2844 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2845 return -1;
2846
2847 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2848 return 1;
2849
2850 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2851 return -1;
2852
2853 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2854 return 1;
2855
2856 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2857 return -1;
2858
2859 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2860 return 1;
2861
2862 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2863 return -1;
2864
2865 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2866 return 1;
2867
2868 return 0;
2869 }
2870
2871 /* Search SYMS for a symbol of the given VALUE. */
2872
2873 static asymbol *
2874 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2875 {
2876 long mid;
2877
2878 if (id == -1)
2879 {
2880 while (lo < hi)
2881 {
2882 mid = (lo + hi) >> 1;
2883 if (syms[mid]->value + syms[mid]->section->vma < value)
2884 lo = mid + 1;
2885 else if (syms[mid]->value + syms[mid]->section->vma > value)
2886 hi = mid;
2887 else
2888 return syms[mid];
2889 }
2890 }
2891 else
2892 {
2893 while (lo < hi)
2894 {
2895 mid = (lo + hi) >> 1;
2896 if (syms[mid]->section->id < id)
2897 lo = mid + 1;
2898 else if (syms[mid]->section->id > id)
2899 hi = mid;
2900 else if (syms[mid]->value < value)
2901 lo = mid + 1;
2902 else if (syms[mid]->value > value)
2903 hi = mid;
2904 else
2905 return syms[mid];
2906 }
2907 }
2908 return NULL;
2909 }
2910
2911 static bfd_boolean
2912 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2913 {
2914 bfd_vma vma = *(bfd_vma *) ptr;
2915 return ((section->flags & SEC_ALLOC) != 0
2916 && section->vma <= vma
2917 && vma < section->vma + section->size);
2918 }
2919
2920 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2921 entry syms. Also generate @plt symbols for the glink branch table. */
2922
2923 static long
2924 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2925 long static_count, asymbol **static_syms,
2926 long dyn_count, asymbol **dyn_syms,
2927 asymbol **ret)
2928 {
2929 asymbol *s;
2930 long i;
2931 long count;
2932 char *names;
2933 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2934 asection *opd;
2935 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2936 asymbol **syms;
2937
2938 *ret = NULL;
2939
2940 opd = bfd_get_section_by_name (abfd, ".opd");
2941 if (opd == NULL)
2942 return 0;
2943
2944 symcount = static_count;
2945 if (!relocatable)
2946 symcount += dyn_count;
2947 if (symcount == 0)
2948 return 0;
2949
2950 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2951 if (syms == NULL)
2952 return -1;
2953
2954 if (!relocatable && static_count != 0 && dyn_count != 0)
2955 {
2956 /* Use both symbol tables. */
2957 memcpy (syms, static_syms, static_count * sizeof (*syms));
2958 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2959 }
2960 else if (!relocatable && static_count == 0)
2961 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2962 else
2963 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2964
2965 synthetic_relocatable = relocatable;
2966 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2967
2968 if (!relocatable && symcount > 1)
2969 {
2970 long j;
2971 /* Trim duplicate syms, since we may have merged the normal and
2972 dynamic symbols. Actually, we only care about syms that have
2973 different values, so trim any with the same value. */
2974 for (i = 1, j = 1; i < symcount; ++i)
2975 if (syms[i - 1]->value + syms[i - 1]->section->vma
2976 != syms[i]->value + syms[i]->section->vma)
2977 syms[j++] = syms[i];
2978 symcount = j;
2979 }
2980
2981 i = 0;
2982 if (strcmp (syms[i]->section->name, ".opd") == 0)
2983 ++i;
2984 codesecsym = i;
2985
2986 for (; i < symcount; ++i)
2987 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2988 != (SEC_CODE | SEC_ALLOC))
2989 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2990 break;
2991 codesecsymend = i;
2992
2993 for (; i < symcount; ++i)
2994 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2995 break;
2996 secsymend = i;
2997
2998 for (; i < symcount; ++i)
2999 if (strcmp (syms[i]->section->name, ".opd") != 0)
3000 break;
3001 opdsymend = i;
3002
3003 for (; i < symcount; ++i)
3004 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3005 != (SEC_CODE | SEC_ALLOC))
3006 break;
3007 symcount = i;
3008
3009 count = 0;
3010
3011 if (relocatable)
3012 {
3013 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3014 arelent *r;
3015 size_t size;
3016 long relcount;
3017
3018 if (opdsymend == secsymend)
3019 goto done;
3020
3021 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3022 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3023 if (relcount == 0)
3024 goto done;
3025
3026 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3027 {
3028 count = -1;
3029 goto done;
3030 }
3031
3032 size = 0;
3033 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3034 {
3035 asymbol *sym;
3036
3037 while (r < opd->relocation + relcount
3038 && r->address < syms[i]->value + opd->vma)
3039 ++r;
3040
3041 if (r == opd->relocation + relcount)
3042 break;
3043
3044 if (r->address != syms[i]->value + opd->vma)
3045 continue;
3046
3047 if (r->howto->type != R_PPC64_ADDR64)
3048 continue;
3049
3050 sym = *r->sym_ptr_ptr;
3051 if (!sym_exists_at (syms, opdsymend, symcount,
3052 sym->section->id, sym->value + r->addend))
3053 {
3054 ++count;
3055 size += sizeof (asymbol);
3056 size += strlen (syms[i]->name) + 2;
3057 }
3058 }
3059
3060 s = *ret = bfd_malloc (size);
3061 if (s == NULL)
3062 {
3063 count = -1;
3064 goto done;
3065 }
3066
3067 names = (char *) (s + count);
3068
3069 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3070 {
3071 asymbol *sym;
3072
3073 while (r < opd->relocation + relcount
3074 && r->address < syms[i]->value + opd->vma)
3075 ++r;
3076
3077 if (r == opd->relocation + relcount)
3078 break;
3079
3080 if (r->address != syms[i]->value + opd->vma)
3081 continue;
3082
3083 if (r->howto->type != R_PPC64_ADDR64)
3084 continue;
3085
3086 sym = *r->sym_ptr_ptr;
3087 if (!sym_exists_at (syms, opdsymend, symcount,
3088 sym->section->id, sym->value + r->addend))
3089 {
3090 size_t len;
3091
3092 *s = *syms[i];
3093 s->flags |= BSF_SYNTHETIC;
3094 s->section = sym->section;
3095 s->value = sym->value + r->addend;
3096 s->name = names;
3097 *names++ = '.';
3098 len = strlen (syms[i]->name);
3099 memcpy (names, syms[i]->name, len + 1);
3100 names += len + 1;
3101 /* Have udata.p point back to the original symbol this
3102 synthetic symbol was derived from. */
3103 s->udata.p = syms[i];
3104 s++;
3105 }
3106 }
3107 }
3108 else
3109 {
3110 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3111 bfd_byte *contents;
3112 size_t size;
3113 long plt_count = 0;
3114 bfd_vma glink_vma = 0, resolv_vma = 0;
3115 asection *dynamic, *glink = NULL, *relplt = NULL;
3116 arelent *p;
3117
3118 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3119 {
3120 if (contents)
3121 {
3122 free_contents_and_exit:
3123 free (contents);
3124 }
3125 count = -1;
3126 goto done;
3127 }
3128
3129 size = 0;
3130 for (i = secsymend; i < opdsymend; ++i)
3131 {
3132 bfd_vma ent;
3133
3134 /* Ignore bogus symbols. */
3135 if (syms[i]->value > opd->size - 8)
3136 continue;
3137
3138 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3139 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3140 {
3141 ++count;
3142 size += sizeof (asymbol);
3143 size += strlen (syms[i]->name) + 2;
3144 }
3145 }
3146
3147 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3148 if (dyn_count != 0
3149 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3150 {
3151 bfd_byte *dynbuf, *extdyn, *extdynend;
3152 size_t extdynsize;
3153 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3154
3155 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3156 goto free_contents_and_exit;
3157
3158 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3159 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3160
3161 extdyn = dynbuf;
3162 extdynend = extdyn + dynamic->size;
3163 for (; extdyn < extdynend; extdyn += extdynsize)
3164 {
3165 Elf_Internal_Dyn dyn;
3166 (*swap_dyn_in) (abfd, extdyn, &dyn);
3167
3168 if (dyn.d_tag == DT_NULL)
3169 break;
3170
3171 if (dyn.d_tag == DT_PPC64_GLINK)
3172 {
3173 /* The first glink stub starts at offset 32; see comment in
3174 ppc64_elf_finish_dynamic_sections. */
3175 glink_vma = dyn.d_un.d_val + 32;
3176 /* The .glink section usually does not survive the final
3177 link; search for the section (usually .text) where the
3178 glink stubs now reside. */
3179 glink = bfd_sections_find_if (abfd, section_covers_vma,
3180 &glink_vma);
3181 break;
3182 }
3183 }
3184
3185 free (dynbuf);
3186 }
3187
3188 if (glink != NULL)
3189 {
3190 /* Determine __glink trampoline by reading the relative branch
3191 from the first glink stub. */
3192 bfd_byte buf[4];
3193 if (bfd_get_section_contents (abfd, glink, buf,
3194 glink_vma + 4 - glink->vma, 4))
3195 {
3196 unsigned int insn = bfd_get_32 (abfd, buf);
3197 insn ^= B_DOT;
3198 if ((insn & ~0x3fffffc) == 0)
3199 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3200 }
3201
3202 if (resolv_vma)
3203 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3204
3205 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3206 if (relplt != NULL)
3207 {
3208 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3209 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3210 goto free_contents_and_exit;
3211
3212 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3213 size += plt_count * sizeof (asymbol);
3214
3215 p = relplt->relocation;
3216 for (i = 0; i < plt_count; i++, p++)
3217 {
3218 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3219 if (p->addend != 0)
3220 size += sizeof ("+0x") - 1 + 16;
3221 }
3222 }
3223 }
3224
3225 s = *ret = bfd_malloc (size);
3226 if (s == NULL)
3227 goto free_contents_and_exit;
3228
3229 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3230
3231 for (i = secsymend; i < opdsymend; ++i)
3232 {
3233 bfd_vma ent;
3234
3235 if (syms[i]->value > opd->size - 8)
3236 continue;
3237
3238 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3239 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3240 {
3241 long lo, hi;
3242 size_t len;
3243 asection *sec = abfd->sections;
3244
3245 *s = *syms[i];
3246 lo = codesecsym;
3247 hi = codesecsymend;
3248 while (lo < hi)
3249 {
3250 long mid = (lo + hi) >> 1;
3251 if (syms[mid]->section->vma < ent)
3252 lo = mid + 1;
3253 else if (syms[mid]->section->vma > ent)
3254 hi = mid;
3255 else
3256 {
3257 sec = syms[mid]->section;
3258 break;
3259 }
3260 }
3261
3262 if (lo >= hi && lo > codesecsym)
3263 sec = syms[lo - 1]->section;
3264
3265 for (; sec != NULL; sec = sec->next)
3266 {
3267 if (sec->vma > ent)
3268 break;
3269 if ((sec->flags & SEC_ALLOC) == 0
3270 || (sec->flags & SEC_LOAD) == 0)
3271 break;
3272 if ((sec->flags & SEC_CODE) != 0)
3273 s->section = sec;
3274 }
3275 s->flags |= BSF_SYNTHETIC;
3276 s->value = ent - s->section->vma;
3277 s->name = names;
3278 *names++ = '.';
3279 len = strlen (syms[i]->name);
3280 memcpy (names, syms[i]->name, len + 1);
3281 names += len + 1;
3282 /* Have udata.p point back to the original symbol this
3283 synthetic symbol was derived from. */
3284 s->udata.p = syms[i];
3285 s++;
3286 }
3287 }
3288 free (contents);
3289
3290 if (glink != NULL && relplt != NULL)
3291 {
3292 if (resolv_vma)
3293 {
3294 /* Add a symbol for the main glink trampoline. */
3295 memset (s, 0, sizeof *s);
3296 s->the_bfd = abfd;
3297 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3298 s->section = glink;
3299 s->value = resolv_vma - glink->vma;
3300 s->name = names;
3301 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3302 names += sizeof ("__glink_PLTresolve");
3303 s++;
3304 count++;
3305 }
3306
3307 /* FIXME: It would be very much nicer to put sym@plt on the
3308 stub rather than on the glink branch table entry. The
3309 objdump disassembler would then use a sensible symbol
3310 name on plt calls. The difficulty in doing so is
3311 a) finding the stubs, and,
3312 b) matching stubs against plt entries, and,
3313 c) there can be multiple stubs for a given plt entry.
3314
3315 Solving (a) could be done by code scanning, but older
3316 ppc64 binaries used different stubs to current code.
3317 (b) is the tricky one since you need to known the toc
3318 pointer for at least one function that uses a pic stub to
3319 be able to calculate the plt address referenced.
3320 (c) means gdb would need to set multiple breakpoints (or
3321 find the glink branch itself) when setting breakpoints
3322 for pending shared library loads. */
3323 p = relplt->relocation;
3324 for (i = 0; i < plt_count; i++, p++)
3325 {
3326 size_t len;
3327
3328 *s = **p->sym_ptr_ptr;
3329 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3330 we are defining a symbol, ensure one of them is set. */
3331 if ((s->flags & BSF_LOCAL) == 0)
3332 s->flags |= BSF_GLOBAL;
3333 s->flags |= BSF_SYNTHETIC;
3334 s->section = glink;
3335 s->value = glink_vma - glink->vma;
3336 s->name = names;
3337 s->udata.p = NULL;
3338 len = strlen ((*p->sym_ptr_ptr)->name);
3339 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3340 names += len;
3341 if (p->addend != 0)
3342 {
3343 memcpy (names, "+0x", sizeof ("+0x") - 1);
3344 names += sizeof ("+0x") - 1;
3345 bfd_sprintf_vma (abfd, names, p->addend);
3346 names += strlen (names);
3347 }
3348 memcpy (names, "@plt", sizeof ("@plt"));
3349 names += sizeof ("@plt");
3350 s++;
3351 glink_vma += 8;
3352 if (i >= 0x8000)
3353 glink_vma += 4;
3354 }
3355 count += plt_count;
3356 }
3357 }
3358
3359 done:
3360 free (syms);
3361 return count;
3362 }
3363 \f
3364 /* The following functions are specific to the ELF linker, while
3365 functions above are used generally. Those named ppc64_elf_* are
3366 called by the main ELF linker code. They appear in this file more
3367 or less in the order in which they are called. eg.
3368 ppc64_elf_check_relocs is called early in the link process,
3369 ppc64_elf_finish_dynamic_sections is one of the last functions
3370 called.
3371
3372 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3373 functions have both a function code symbol and a function descriptor
3374 symbol. A call to foo in a relocatable object file looks like:
3375
3376 . .text
3377 . x:
3378 . bl .foo
3379 . nop
3380
3381 The function definition in another object file might be:
3382
3383 . .section .opd
3384 . foo: .quad .foo
3385 . .quad .TOC.@tocbase
3386 . .quad 0
3387 .
3388 . .text
3389 . .foo: blr
3390
3391 When the linker resolves the call during a static link, the branch
3392 unsurprisingly just goes to .foo and the .opd information is unused.
3393 If the function definition is in a shared library, things are a little
3394 different: The call goes via a plt call stub, the opd information gets
3395 copied to the plt, and the linker patches the nop.
3396
3397 . x:
3398 . bl .foo_stub
3399 . ld 2,40(1)
3400 .
3401 .
3402 . .foo_stub:
3403 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3404 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3405 . std 2,40(1) # this is the general idea
3406 . ld 11,0(12)
3407 . ld 2,8(12)
3408 . mtctr 11
3409 . ld 11,16(12)
3410 . bctr
3411 .
3412 . .section .plt
3413 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3414
3415 The "reloc ()" notation is supposed to indicate that the linker emits
3416 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3417 copying.
3418
3419 What are the difficulties here? Well, firstly, the relocations
3420 examined by the linker in check_relocs are against the function code
3421 sym .foo, while the dynamic relocation in the plt is emitted against
3422 the function descriptor symbol, foo. Somewhere along the line, we need
3423 to carefully copy dynamic link information from one symbol to the other.
3424 Secondly, the generic part of the elf linker will make .foo a dynamic
3425 symbol as is normal for most other backends. We need foo dynamic
3426 instead, at least for an application final link. However, when
3427 creating a shared library containing foo, we need to have both symbols
3428 dynamic so that references to .foo are satisfied during the early
3429 stages of linking. Otherwise the linker might decide to pull in a
3430 definition from some other object, eg. a static library.
3431
3432 Update: As of August 2004, we support a new convention. Function
3433 calls may use the function descriptor symbol, ie. "bl foo". This
3434 behaves exactly as "bl .foo". */
3435
3436 /* The linker needs to keep track of the number of relocs that it
3437 decides to copy as dynamic relocs in check_relocs for each symbol.
3438 This is so that it can later discard them if they are found to be
3439 unnecessary. We store the information in a field extending the
3440 regular ELF linker hash table. */
3441
3442 struct ppc_dyn_relocs
3443 {
3444 struct ppc_dyn_relocs *next;
3445
3446 /* The input section of the reloc. */
3447 asection *sec;
3448
3449 /* Total number of relocs copied for the input section. */
3450 bfd_size_type count;
3451
3452 /* Number of pc-relative relocs copied for the input section. */
3453 bfd_size_type pc_count;
3454 };
3455
3456 /* Track GOT entries needed for a given symbol. We might need more
3457 than one got entry per symbol. */
3458 struct got_entry
3459 {
3460 struct got_entry *next;
3461
3462 /* The symbol addend that we'll be placing in the GOT. */
3463 bfd_vma addend;
3464
3465 /* Unlike other ELF targets, we use separate GOT entries for the same
3466 symbol referenced from different input files. This is to support
3467 automatic multiple TOC/GOT sections, where the TOC base can vary
3468 from one input file to another. FIXME: After group_sections we
3469 ought to merge entries within the group.
3470
3471 Point to the BFD owning this GOT entry. */
3472 bfd *owner;
3473
3474 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3475 TLS_TPREL or TLS_DTPREL for tls entries. */
3476 char tls_type;
3477
3478 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3479 union
3480 {
3481 bfd_signed_vma refcount;
3482 bfd_vma offset;
3483 } got;
3484 };
3485
3486 /* The same for PLT. */
3487 struct plt_entry
3488 {
3489 struct plt_entry *next;
3490
3491 bfd_vma addend;
3492
3493 union
3494 {
3495 bfd_signed_vma refcount;
3496 bfd_vma offset;
3497 } plt;
3498 };
3499
3500 /* Of those relocs that might be copied as dynamic relocs, this function
3501 selects those that must be copied when linking a shared library,
3502 even when the symbol is local. */
3503
3504 static int
3505 must_be_dyn_reloc (struct bfd_link_info *info,
3506 enum elf_ppc64_reloc_type r_type)
3507 {
3508 switch (r_type)
3509 {
3510 default:
3511 return 1;
3512
3513 case R_PPC64_REL32:
3514 case R_PPC64_REL64:
3515 case R_PPC64_REL30:
3516 return 0;
3517
3518 case R_PPC64_TPREL16:
3519 case R_PPC64_TPREL16_LO:
3520 case R_PPC64_TPREL16_HI:
3521 case R_PPC64_TPREL16_HA:
3522 case R_PPC64_TPREL16_DS:
3523 case R_PPC64_TPREL16_LO_DS:
3524 case R_PPC64_TPREL16_HIGHER:
3525 case R_PPC64_TPREL16_HIGHERA:
3526 case R_PPC64_TPREL16_HIGHEST:
3527 case R_PPC64_TPREL16_HIGHESTA:
3528 case R_PPC64_TPREL64:
3529 return !info->executable;
3530 }
3531 }
3532
3533 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3534 copying dynamic variables from a shared lib into an app's dynbss
3535 section, and instead use a dynamic relocation to point into the
3536 shared lib. With code that gcc generates, it's vital that this be
3537 enabled; In the PowerPC64 ABI, the address of a function is actually
3538 the address of a function descriptor, which resides in the .opd
3539 section. gcc uses the descriptor directly rather than going via the
3540 GOT as some other ABI's do, which means that initialized function
3541 pointers must reference the descriptor. Thus, a function pointer
3542 initialized to the address of a function in a shared library will
3543 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3544 redefines the function descriptor symbol to point to the copy. This
3545 presents a problem as a plt entry for that function is also
3546 initialized from the function descriptor symbol and the copy reloc
3547 may not be initialized first. */
3548 #define ELIMINATE_COPY_RELOCS 1
3549
3550 /* Section name for stubs is the associated section name plus this
3551 string. */
3552 #define STUB_SUFFIX ".stub"
3553
3554 /* Linker stubs.
3555 ppc_stub_long_branch:
3556 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3557 destination, but a 24 bit branch in a stub section will reach.
3558 . b dest
3559
3560 ppc_stub_plt_branch:
3561 Similar to the above, but a 24 bit branch in the stub section won't
3562 reach its destination.
3563 . addis %r12,%r2,xxx@toc@ha
3564 . ld %r11,xxx@toc@l(%r12)
3565 . mtctr %r11
3566 . bctr
3567
3568 ppc_stub_plt_call:
3569 Used to call a function in a shared library. If it so happens that
3570 the plt entry referenced crosses a 64k boundary, then an extra
3571 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3572 . addis %r12,%r2,xxx@toc@ha
3573 . std %r2,40(%r1)
3574 . ld %r11,xxx+0@toc@l(%r12)
3575 . mtctr %r11
3576 . ld %r2,xxx+8@toc@l(%r12)
3577 . ld %r11,xxx+16@toc@l(%r12)
3578 . bctr
3579
3580 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3581 code to adjust the value and save r2 to support multiple toc sections.
3582 A ppc_stub_long_branch with an r2 offset looks like:
3583 . std %r2,40(%r1)
3584 . addis %r2,%r2,off@ha
3585 . addi %r2,%r2,off@l
3586 . b dest
3587
3588 A ppc_stub_plt_branch with an r2 offset looks like:
3589 . std %r2,40(%r1)
3590 . addis %r12,%r2,xxx@toc@ha
3591 . ld %r11,xxx@toc@l(%r12)
3592 . addis %r2,%r2,off@ha
3593 . addi %r2,%r2,off@l
3594 . mtctr %r11
3595 . bctr
3596
3597 In cases where the "addis" instruction would add zero, the "addis" is
3598 omitted and following instructions modified slightly in some cases.
3599 */
3600
3601 enum ppc_stub_type {
3602 ppc_stub_none,
3603 ppc_stub_long_branch,
3604 ppc_stub_long_branch_r2off,
3605 ppc_stub_plt_branch,
3606 ppc_stub_plt_branch_r2off,
3607 ppc_stub_plt_call
3608 };
3609
3610 struct ppc_stub_hash_entry {
3611
3612 /* Base hash table entry structure. */
3613 struct bfd_hash_entry root;
3614
3615 enum ppc_stub_type stub_type;
3616
3617 /* The stub section. */
3618 asection *stub_sec;
3619
3620 /* Offset within stub_sec of the beginning of this stub. */
3621 bfd_vma stub_offset;
3622
3623 /* Given the symbol's value and its section we can determine its final
3624 value when building the stubs (so the stub knows where to jump. */
3625 bfd_vma target_value;
3626 asection *target_section;
3627
3628 /* The symbol table entry, if any, that this was derived from. */
3629 struct ppc_link_hash_entry *h;
3630 struct plt_entry *plt_ent;
3631
3632 /* And the reloc addend that this was derived from. */
3633 bfd_vma addend;
3634
3635 /* Where this stub is being called from, or, in the case of combined
3636 stub sections, the first input section in the group. */
3637 asection *id_sec;
3638 };
3639
3640 struct ppc_branch_hash_entry {
3641
3642 /* Base hash table entry structure. */
3643 struct bfd_hash_entry root;
3644
3645 /* Offset within branch lookup table. */
3646 unsigned int offset;
3647
3648 /* Generation marker. */
3649 unsigned int iter;
3650 };
3651
3652 struct ppc_link_hash_entry
3653 {
3654 struct elf_link_hash_entry elf;
3655
3656 union {
3657 /* A pointer to the most recently used stub hash entry against this
3658 symbol. */
3659 struct ppc_stub_hash_entry *stub_cache;
3660
3661 /* A pointer to the next symbol starting with a '.' */
3662 struct ppc_link_hash_entry *next_dot_sym;
3663 } u;
3664
3665 /* Track dynamic relocs copied for this symbol. */
3666 struct ppc_dyn_relocs *dyn_relocs;
3667
3668 /* Link between function code and descriptor symbols. */
3669 struct ppc_link_hash_entry *oh;
3670
3671 /* Flag function code and descriptor symbols. */
3672 unsigned int is_func:1;
3673 unsigned int is_func_descriptor:1;
3674 unsigned int fake:1;
3675
3676 /* Whether global opd/toc sym has been adjusted or not.
3677 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3678 should be set for all globals defined in any opd/toc section. */
3679 unsigned int adjust_done:1;
3680
3681 /* Set if we twiddled this symbol to weak at some stage. */
3682 unsigned int was_undefined:1;
3683
3684 /* Contexts in which symbol is used in the GOT (or TOC).
3685 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3686 corresponding relocs are encountered during check_relocs.
3687 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3688 indicate the corresponding GOT entry type is not needed.
3689 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3690 a TPREL one. We use a separate flag rather than setting TPREL
3691 just for convenience in distinguishing the two cases. */
3692 #define TLS_GD 1 /* GD reloc. */
3693 #define TLS_LD 2 /* LD reloc. */
3694 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3695 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3696 #define TLS_TLS 16 /* Any TLS reloc. */
3697 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3698 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3699 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3700 char tls_mask;
3701 };
3702
3703 /* ppc64 ELF linker hash table. */
3704
3705 struct ppc_link_hash_table
3706 {
3707 struct elf_link_hash_table elf;
3708
3709 /* The stub hash table. */
3710 struct bfd_hash_table stub_hash_table;
3711
3712 /* Another hash table for plt_branch stubs. */
3713 struct bfd_hash_table branch_hash_table;
3714
3715 /* Linker stub bfd. */
3716 bfd *stub_bfd;
3717
3718 /* Linker call-backs. */
3719 asection * (*add_stub_section) (const char *, asection *);
3720 void (*layout_sections_again) (void);
3721
3722 /* Array to keep track of which stub sections have been created, and
3723 information on stub grouping. */
3724 struct map_stub {
3725 /* This is the section to which stubs in the group will be attached. */
3726 asection *link_sec;
3727 /* The stub section. */
3728 asection *stub_sec;
3729 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3730 bfd_vma toc_off;
3731 } *stub_group;
3732
3733 /* Temp used when calculating TOC pointers. */
3734 bfd_vma toc_curr;
3735
3736 /* Highest input section id. */
3737 int top_id;
3738
3739 /* Highest output section index. */
3740 int top_index;
3741
3742 /* Used when adding symbols. */
3743 struct ppc_link_hash_entry *dot_syms;
3744
3745 /* List of input sections for each output section. */
3746 asection **input_list;
3747
3748 /* Short-cuts to get to dynamic linker sections. */
3749 asection *got;
3750 asection *plt;
3751 asection *relplt;
3752 asection *iplt;
3753 asection *reliplt;
3754 asection *dynbss;
3755 asection *relbss;
3756 asection *glink;
3757 asection *sfpr;
3758 asection *brlt;
3759 asection *relbrlt;
3760
3761 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3762 struct ppc_link_hash_entry *tls_get_addr;
3763 struct ppc_link_hash_entry *tls_get_addr_fd;
3764
3765 /* Statistics. */
3766 unsigned long stub_count[ppc_stub_plt_call];
3767
3768 /* Number of stubs against global syms. */
3769 unsigned long stub_globals;
3770
3771 /* Set if we should emit symbols for stubs. */
3772 unsigned int emit_stub_syms:1;
3773
3774 /* Set if __tls_get_addr optimization should not be done. */
3775 unsigned int no_tls_get_addr_opt:1;
3776
3777 /* Support for multiple toc sections. */
3778 unsigned int no_multi_toc:1;
3779 unsigned int multi_toc_needed:1;
3780
3781 /* Set on error. */
3782 unsigned int stub_error:1;
3783
3784 /* Temp used by ppc64_elf_process_dot_syms. */
3785 unsigned int twiddled_syms:1;
3786
3787 /* Incremented every time we size stubs. */
3788 unsigned int stub_iteration;
3789
3790 /* Small local sym cache. */
3791 struct sym_cache sym_cache;
3792 };
3793
3794 /* Rename some of the generic section flags to better document how they
3795 are used here. */
3796 #define has_toc_reloc has_gp_reloc
3797 #define makes_toc_func_call need_finalize_relax
3798 #define call_check_in_progress reloc_done
3799
3800 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3801
3802 #define ppc_hash_table(p) \
3803 ((struct ppc_link_hash_table *) ((p)->hash))
3804
3805 #define ppc_stub_hash_lookup(table, string, create, copy) \
3806 ((struct ppc_stub_hash_entry *) \
3807 bfd_hash_lookup ((table), (string), (create), (copy)))
3808
3809 #define ppc_branch_hash_lookup(table, string, create, copy) \
3810 ((struct ppc_branch_hash_entry *) \
3811 bfd_hash_lookup ((table), (string), (create), (copy)))
3812
3813 /* Create an entry in the stub hash table. */
3814
3815 static struct bfd_hash_entry *
3816 stub_hash_newfunc (struct bfd_hash_entry *entry,
3817 struct bfd_hash_table *table,
3818 const char *string)
3819 {
3820 /* Allocate the structure if it has not already been allocated by a
3821 subclass. */
3822 if (entry == NULL)
3823 {
3824 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3825 if (entry == NULL)
3826 return entry;
3827 }
3828
3829 /* Call the allocation method of the superclass. */
3830 entry = bfd_hash_newfunc (entry, table, string);
3831 if (entry != NULL)
3832 {
3833 struct ppc_stub_hash_entry *eh;
3834
3835 /* Initialize the local fields. */
3836 eh = (struct ppc_stub_hash_entry *) entry;
3837 eh->stub_type = ppc_stub_none;
3838 eh->stub_sec = NULL;
3839 eh->stub_offset = 0;
3840 eh->target_value = 0;
3841 eh->target_section = NULL;
3842 eh->h = NULL;
3843 eh->id_sec = NULL;
3844 }
3845
3846 return entry;
3847 }
3848
3849 /* Create an entry in the branch hash table. */
3850
3851 static struct bfd_hash_entry *
3852 branch_hash_newfunc (struct bfd_hash_entry *entry,
3853 struct bfd_hash_table *table,
3854 const char *string)
3855 {
3856 /* Allocate the structure if it has not already been allocated by a
3857 subclass. */
3858 if (entry == NULL)
3859 {
3860 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3861 if (entry == NULL)
3862 return entry;
3863 }
3864
3865 /* Call the allocation method of the superclass. */
3866 entry = bfd_hash_newfunc (entry, table, string);
3867 if (entry != NULL)
3868 {
3869 struct ppc_branch_hash_entry *eh;
3870
3871 /* Initialize the local fields. */
3872 eh = (struct ppc_branch_hash_entry *) entry;
3873 eh->offset = 0;
3874 eh->iter = 0;
3875 }
3876
3877 return entry;
3878 }
3879
3880 /* Create an entry in a ppc64 ELF linker hash table. */
3881
3882 static struct bfd_hash_entry *
3883 link_hash_newfunc (struct bfd_hash_entry *entry,
3884 struct bfd_hash_table *table,
3885 const char *string)
3886 {
3887 /* Allocate the structure if it has not already been allocated by a
3888 subclass. */
3889 if (entry == NULL)
3890 {
3891 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3892 if (entry == NULL)
3893 return entry;
3894 }
3895
3896 /* Call the allocation method of the superclass. */
3897 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3898 if (entry != NULL)
3899 {
3900 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3901
3902 memset (&eh->u.stub_cache, 0,
3903 (sizeof (struct ppc_link_hash_entry)
3904 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3905
3906 /* When making function calls, old ABI code references function entry
3907 points (dot symbols), while new ABI code references the function
3908 descriptor symbol. We need to make any combination of reference and
3909 definition work together, without breaking archive linking.
3910
3911 For a defined function "foo" and an undefined call to "bar":
3912 An old object defines "foo" and ".foo", references ".bar" (possibly
3913 "bar" too).
3914 A new object defines "foo" and references "bar".
3915
3916 A new object thus has no problem with its undefined symbols being
3917 satisfied by definitions in an old object. On the other hand, the
3918 old object won't have ".bar" satisfied by a new object.
3919
3920 Keep a list of newly added dot-symbols. */
3921
3922 if (string[0] == '.')
3923 {
3924 struct ppc_link_hash_table *htab;
3925
3926 htab = (struct ppc_link_hash_table *) table;
3927 eh->u.next_dot_sym = htab->dot_syms;
3928 htab->dot_syms = eh;
3929 }
3930 }
3931
3932 return entry;
3933 }
3934
3935 /* Create a ppc64 ELF linker hash table. */
3936
3937 static struct bfd_link_hash_table *
3938 ppc64_elf_link_hash_table_create (bfd *abfd)
3939 {
3940 struct ppc_link_hash_table *htab;
3941 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3942
3943 htab = bfd_zmalloc (amt);
3944 if (htab == NULL)
3945 return NULL;
3946
3947 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3948 sizeof (struct ppc_link_hash_entry)))
3949 {
3950 free (htab);
3951 return NULL;
3952 }
3953
3954 /* Init the stub hash table too. */
3955 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3956 sizeof (struct ppc_stub_hash_entry)))
3957 return NULL;
3958
3959 /* And the branch hash table. */
3960 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3961 sizeof (struct ppc_branch_hash_entry)))
3962 return NULL;
3963
3964 /* Initializing two fields of the union is just cosmetic. We really
3965 only care about glist, but when compiled on a 32-bit host the
3966 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3967 debugger inspection of these fields look nicer. */
3968 htab->elf.init_got_refcount.refcount = 0;
3969 htab->elf.init_got_refcount.glist = NULL;
3970 htab->elf.init_plt_refcount.refcount = 0;
3971 htab->elf.init_plt_refcount.glist = NULL;
3972 htab->elf.init_got_offset.offset = 0;
3973 htab->elf.init_got_offset.glist = NULL;
3974 htab->elf.init_plt_offset.offset = 0;
3975 htab->elf.init_plt_offset.glist = NULL;
3976
3977 return &htab->elf.root;
3978 }
3979
3980 /* Free the derived linker hash table. */
3981
3982 static void
3983 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3984 {
3985 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3986
3987 bfd_hash_table_free (&ret->stub_hash_table);
3988 bfd_hash_table_free (&ret->branch_hash_table);
3989 _bfd_generic_link_hash_table_free (hash);
3990 }
3991
3992 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3993
3994 void
3995 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3996 {
3997 struct ppc_link_hash_table *htab;
3998
3999 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4000
4001 /* Always hook our dynamic sections into the first bfd, which is the
4002 linker created stub bfd. This ensures that the GOT header is at
4003 the start of the output TOC section. */
4004 htab = ppc_hash_table (info);
4005 htab->stub_bfd = abfd;
4006 htab->elf.dynobj = abfd;
4007 }
4008
4009 /* Build a name for an entry in the stub hash table. */
4010
4011 static char *
4012 ppc_stub_name (const asection *input_section,
4013 const asection *sym_sec,
4014 const struct ppc_link_hash_entry *h,
4015 const Elf_Internal_Rela *rel)
4016 {
4017 char *stub_name;
4018 bfd_size_type len;
4019
4020 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4021 offsets from a sym as a branch target? In fact, we could
4022 probably assume the addend is always zero. */
4023 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4024
4025 if (h)
4026 {
4027 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4028 stub_name = bfd_malloc (len);
4029 if (stub_name == NULL)
4030 return stub_name;
4031
4032 sprintf (stub_name, "%08x.%s+%x",
4033 input_section->id & 0xffffffff,
4034 h->elf.root.root.string,
4035 (int) rel->r_addend & 0xffffffff);
4036 }
4037 else
4038 {
4039 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4040 stub_name = bfd_malloc (len);
4041 if (stub_name == NULL)
4042 return stub_name;
4043
4044 sprintf (stub_name, "%08x.%x:%x+%x",
4045 input_section->id & 0xffffffff,
4046 sym_sec->id & 0xffffffff,
4047 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4048 (int) rel->r_addend & 0xffffffff);
4049 }
4050 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4051 stub_name[len - 2] = 0;
4052 return stub_name;
4053 }
4054
4055 /* Look up an entry in the stub hash. Stub entries are cached because
4056 creating the stub name takes a bit of time. */
4057
4058 static struct ppc_stub_hash_entry *
4059 ppc_get_stub_entry (const asection *input_section,
4060 const asection *sym_sec,
4061 struct ppc_link_hash_entry *h,
4062 const Elf_Internal_Rela *rel,
4063 struct ppc_link_hash_table *htab)
4064 {
4065 struct ppc_stub_hash_entry *stub_entry;
4066 const asection *id_sec;
4067
4068 /* If this input section is part of a group of sections sharing one
4069 stub section, then use the id of the first section in the group.
4070 Stub names need to include a section id, as there may well be
4071 more than one stub used to reach say, printf, and we need to
4072 distinguish between them. */
4073 id_sec = htab->stub_group[input_section->id].link_sec;
4074
4075 if (h != NULL && h->u.stub_cache != NULL
4076 && h->u.stub_cache->h == h
4077 && h->u.stub_cache->id_sec == id_sec)
4078 {
4079 stub_entry = h->u.stub_cache;
4080 }
4081 else
4082 {
4083 char *stub_name;
4084
4085 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4086 if (stub_name == NULL)
4087 return NULL;
4088
4089 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4090 stub_name, FALSE, FALSE);
4091 if (h != NULL)
4092 h->u.stub_cache = stub_entry;
4093
4094 free (stub_name);
4095 }
4096
4097 return stub_entry;
4098 }
4099
4100 /* Add a new stub entry to the stub hash. Not all fields of the new
4101 stub entry are initialised. */
4102
4103 static struct ppc_stub_hash_entry *
4104 ppc_add_stub (const char *stub_name,
4105 asection *section,
4106 struct ppc_link_hash_table *htab)
4107 {
4108 asection *link_sec;
4109 asection *stub_sec;
4110 struct ppc_stub_hash_entry *stub_entry;
4111
4112 link_sec = htab->stub_group[section->id].link_sec;
4113 stub_sec = htab->stub_group[section->id].stub_sec;
4114 if (stub_sec == NULL)
4115 {
4116 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4117 if (stub_sec == NULL)
4118 {
4119 size_t namelen;
4120 bfd_size_type len;
4121 char *s_name;
4122
4123 namelen = strlen (link_sec->name);
4124 len = namelen + sizeof (STUB_SUFFIX);
4125 s_name = bfd_alloc (htab->stub_bfd, len);
4126 if (s_name == NULL)
4127 return NULL;
4128
4129 memcpy (s_name, link_sec->name, namelen);
4130 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4131 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4132 if (stub_sec == NULL)
4133 return NULL;
4134 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4135 }
4136 htab->stub_group[section->id].stub_sec = stub_sec;
4137 }
4138
4139 /* Enter this entry into the linker stub hash table. */
4140 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4141 TRUE, FALSE);
4142 if (stub_entry == NULL)
4143 {
4144 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4145 section->owner, stub_name);
4146 return NULL;
4147 }
4148
4149 stub_entry->stub_sec = stub_sec;
4150 stub_entry->stub_offset = 0;
4151 stub_entry->id_sec = link_sec;
4152 return stub_entry;
4153 }
4154
4155 /* Create sections for linker generated code. */
4156
4157 static bfd_boolean
4158 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4159 {
4160 struct ppc_link_hash_table *htab;
4161 flagword flags;
4162
4163 htab = ppc_hash_table (info);
4164
4165 /* Create .sfpr for code to save and restore fp regs. */
4166 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4167 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4168 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4169 flags);
4170 if (htab->sfpr == NULL
4171 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4172 return FALSE;
4173
4174 /* Create .glink for lazy dynamic linking support. */
4175 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4176 flags);
4177 if (htab->glink == NULL
4178 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4179 return FALSE;
4180
4181 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4182 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4183 if (htab->iplt == NULL
4184 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4185 return FALSE;
4186
4187 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4188 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4189 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4190 ".rela.iplt",
4191 flags);
4192 if (htab->reliplt == NULL
4193 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4194 return FALSE;
4195
4196 /* Create branch lookup table for plt_branch stubs. */
4197 flags = (SEC_ALLOC | SEC_LOAD
4198 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4199 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4200 flags);
4201 if (htab->brlt == NULL
4202 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4203 return FALSE;
4204
4205 if (!info->shared)
4206 return TRUE;
4207
4208 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4209 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4210 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4211 ".rela.branch_lt",
4212 flags);
4213 if (htab->relbrlt == NULL
4214 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4215 return FALSE;
4216
4217 return TRUE;
4218 }
4219
4220 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4221 not already done. */
4222
4223 static bfd_boolean
4224 create_got_section (bfd *abfd, struct bfd_link_info *info)
4225 {
4226 asection *got, *relgot;
4227 flagword flags;
4228 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4229
4230 if (!is_ppc64_elf (abfd))
4231 return FALSE;
4232
4233 if (!htab->got)
4234 {
4235 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4236 return FALSE;
4237
4238 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4239 if (!htab->got)
4240 abort ();
4241 }
4242
4243 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4244 | SEC_LINKER_CREATED);
4245
4246 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4247 if (!got
4248 || !bfd_set_section_alignment (abfd, got, 3))
4249 return FALSE;
4250
4251 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4252 flags | SEC_READONLY);
4253 if (!relgot
4254 || ! bfd_set_section_alignment (abfd, relgot, 3))
4255 return FALSE;
4256
4257 ppc64_elf_tdata (abfd)->got = got;
4258 ppc64_elf_tdata (abfd)->relgot = relgot;
4259 return TRUE;
4260 }
4261
4262 /* Create the dynamic sections, and set up shortcuts. */
4263
4264 static bfd_boolean
4265 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4266 {
4267 struct ppc_link_hash_table *htab;
4268
4269 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4270 return FALSE;
4271
4272 htab = ppc_hash_table (info);
4273 if (!htab->got)
4274 htab->got = bfd_get_section_by_name (dynobj, ".got");
4275 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4276 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4277 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4278 if (!info->shared)
4279 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4280
4281 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4282 || (!info->shared && !htab->relbss))
4283 abort ();
4284
4285 return TRUE;
4286 }
4287
4288 /* Follow indirect and warning symbol links. */
4289
4290 static inline struct bfd_link_hash_entry *
4291 follow_link (struct bfd_link_hash_entry *h)
4292 {
4293 while (h->type == bfd_link_hash_indirect
4294 || h->type == bfd_link_hash_warning)
4295 h = h->u.i.link;
4296 return h;
4297 }
4298
4299 static inline struct elf_link_hash_entry *
4300 elf_follow_link (struct elf_link_hash_entry *h)
4301 {
4302 return (struct elf_link_hash_entry *) follow_link (&h->root);
4303 }
4304
4305 static inline struct ppc_link_hash_entry *
4306 ppc_follow_link (struct ppc_link_hash_entry *h)
4307 {
4308 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4309 }
4310
4311 /* Merge PLT info on FROM with that on TO. */
4312
4313 static void
4314 move_plt_plist (struct ppc_link_hash_entry *from,
4315 struct ppc_link_hash_entry *to)
4316 {
4317 if (from->elf.plt.plist != NULL)
4318 {
4319 if (to->elf.plt.plist != NULL)
4320 {
4321 struct plt_entry **entp;
4322 struct plt_entry *ent;
4323
4324 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4325 {
4326 struct plt_entry *dent;
4327
4328 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4329 if (dent->addend == ent->addend)
4330 {
4331 dent->plt.refcount += ent->plt.refcount;
4332 *entp = ent->next;
4333 break;
4334 }
4335 if (dent == NULL)
4336 entp = &ent->next;
4337 }
4338 *entp = to->elf.plt.plist;
4339 }
4340
4341 to->elf.plt.plist = from->elf.plt.plist;
4342 from->elf.plt.plist = NULL;
4343 }
4344 }
4345
4346 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4347
4348 static void
4349 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4350 struct elf_link_hash_entry *dir,
4351 struct elf_link_hash_entry *ind)
4352 {
4353 struct ppc_link_hash_entry *edir, *eind;
4354
4355 edir = (struct ppc_link_hash_entry *) dir;
4356 eind = (struct ppc_link_hash_entry *) ind;
4357
4358 /* Copy over any dynamic relocs we may have on the indirect sym. */
4359 if (eind->dyn_relocs != NULL)
4360 {
4361 if (edir->dyn_relocs != NULL)
4362 {
4363 struct ppc_dyn_relocs **pp;
4364 struct ppc_dyn_relocs *p;
4365
4366 /* Add reloc counts against the indirect sym to the direct sym
4367 list. Merge any entries against the same section. */
4368 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4369 {
4370 struct ppc_dyn_relocs *q;
4371
4372 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4373 if (q->sec == p->sec)
4374 {
4375 q->pc_count += p->pc_count;
4376 q->count += p->count;
4377 *pp = p->next;
4378 break;
4379 }
4380 if (q == NULL)
4381 pp = &p->next;
4382 }
4383 *pp = edir->dyn_relocs;
4384 }
4385
4386 edir->dyn_relocs = eind->dyn_relocs;
4387 eind->dyn_relocs = NULL;
4388 }
4389
4390 edir->is_func |= eind->is_func;
4391 edir->is_func_descriptor |= eind->is_func_descriptor;
4392 edir->tls_mask |= eind->tls_mask;
4393 if (eind->oh != NULL)
4394 edir->oh = ppc_follow_link (eind->oh);
4395
4396 /* If called to transfer flags for a weakdef during processing
4397 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4398 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4399 if (!(ELIMINATE_COPY_RELOCS
4400 && eind->elf.root.type != bfd_link_hash_indirect
4401 && edir->elf.dynamic_adjusted))
4402 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4403
4404 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4405 edir->elf.ref_regular |= eind->elf.ref_regular;
4406 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4407 edir->elf.needs_plt |= eind->elf.needs_plt;
4408
4409 /* If we were called to copy over info for a weak sym, that's all. */
4410 if (eind->elf.root.type != bfd_link_hash_indirect)
4411 return;
4412
4413 /* Copy over got entries that we may have already seen to the
4414 symbol which just became indirect. */
4415 if (eind->elf.got.glist != NULL)
4416 {
4417 if (edir->elf.got.glist != NULL)
4418 {
4419 struct got_entry **entp;
4420 struct got_entry *ent;
4421
4422 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4423 {
4424 struct got_entry *dent;
4425
4426 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4427 if (dent->addend == ent->addend
4428 && dent->owner == ent->owner
4429 && dent->tls_type == ent->tls_type)
4430 {
4431 dent->got.refcount += ent->got.refcount;
4432 *entp = ent->next;
4433 break;
4434 }
4435 if (dent == NULL)
4436 entp = &ent->next;
4437 }
4438 *entp = edir->elf.got.glist;
4439 }
4440
4441 edir->elf.got.glist = eind->elf.got.glist;
4442 eind->elf.got.glist = NULL;
4443 }
4444
4445 /* And plt entries. */
4446 move_plt_plist (eind, edir);
4447
4448 if (eind->elf.dynindx != -1)
4449 {
4450 if (edir->elf.dynindx != -1)
4451 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4452 edir->elf.dynstr_index);
4453 edir->elf.dynindx = eind->elf.dynindx;
4454 edir->elf.dynstr_index = eind->elf.dynstr_index;
4455 eind->elf.dynindx = -1;
4456 eind->elf.dynstr_index = 0;
4457 }
4458 }
4459
4460 /* Find the function descriptor hash entry from the given function code
4461 hash entry FH. Link the entries via their OH fields. */
4462
4463 static struct ppc_link_hash_entry *
4464 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4465 {
4466 struct ppc_link_hash_entry *fdh = fh->oh;
4467
4468 if (fdh == NULL)
4469 {
4470 const char *fd_name = fh->elf.root.root.string + 1;
4471
4472 fdh = (struct ppc_link_hash_entry *)
4473 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4474 if (fdh == NULL)
4475 return fdh;
4476
4477 fdh->is_func_descriptor = 1;
4478 fdh->oh = fh;
4479 fh->is_func = 1;
4480 fh->oh = fdh;
4481 }
4482
4483 return ppc_follow_link (fdh);
4484 }
4485
4486 /* Make a fake function descriptor sym for the code sym FH. */
4487
4488 static struct ppc_link_hash_entry *
4489 make_fdh (struct bfd_link_info *info,
4490 struct ppc_link_hash_entry *fh)
4491 {
4492 bfd *abfd;
4493 asymbol *newsym;
4494 struct bfd_link_hash_entry *bh;
4495 struct ppc_link_hash_entry *fdh;
4496
4497 abfd = fh->elf.root.u.undef.abfd;
4498 newsym = bfd_make_empty_symbol (abfd);
4499 newsym->name = fh->elf.root.root.string + 1;
4500 newsym->section = bfd_und_section_ptr;
4501 newsym->value = 0;
4502 newsym->flags = BSF_WEAK;
4503
4504 bh = NULL;
4505 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4506 newsym->flags, newsym->section,
4507 newsym->value, NULL, FALSE, FALSE,
4508 &bh))
4509 return NULL;
4510
4511 fdh = (struct ppc_link_hash_entry *) bh;
4512 fdh->elf.non_elf = 0;
4513 fdh->fake = 1;
4514 fdh->is_func_descriptor = 1;
4515 fdh->oh = fh;
4516 fh->is_func = 1;
4517 fh->oh = fdh;
4518 return fdh;
4519 }
4520
4521 /* Fix function descriptor symbols defined in .opd sections to be
4522 function type. */
4523
4524 static bfd_boolean
4525 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4526 struct bfd_link_info *info,
4527 Elf_Internal_Sym *isym,
4528 const char **name ATTRIBUTE_UNUSED,
4529 flagword *flags ATTRIBUTE_UNUSED,
4530 asection **sec,
4531 bfd_vma *value ATTRIBUTE_UNUSED)
4532 {
4533 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4534 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4535 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4536 ;
4537 else if (*sec != NULL
4538 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4539 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4540
4541 return TRUE;
4542 }
4543
4544 /* This function makes an old ABI object reference to ".bar" cause the
4545 inclusion of a new ABI object archive that defines "bar".
4546 NAME is a symbol defined in an archive. Return a symbol in the hash
4547 table that might be satisfied by the archive symbols. */
4548
4549 static struct elf_link_hash_entry *
4550 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4551 struct bfd_link_info *info,
4552 const char *name)
4553 {
4554 struct elf_link_hash_entry *h;
4555 char *dot_name;
4556 size_t len;
4557
4558 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4559 if (h != NULL
4560 /* Don't return this sym if it is a fake function descriptor
4561 created by add_symbol_adjust. */
4562 && !(h->root.type == bfd_link_hash_undefweak
4563 && ((struct ppc_link_hash_entry *) h)->fake))
4564 return h;
4565
4566 if (name[0] == '.')
4567 return h;
4568
4569 len = strlen (name);
4570 dot_name = bfd_alloc (abfd, len + 2);
4571 if (dot_name == NULL)
4572 return (struct elf_link_hash_entry *) 0 - 1;
4573 dot_name[0] = '.';
4574 memcpy (dot_name + 1, name, len + 1);
4575 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4576 bfd_release (abfd, dot_name);
4577 return h;
4578 }
4579
4580 /* This function satisfies all old ABI object references to ".bar" if a
4581 new ABI object defines "bar". Well, at least, undefined dot symbols
4582 are made weak. This stops later archive searches from including an
4583 object if we already have a function descriptor definition. It also
4584 prevents the linker complaining about undefined symbols.
4585 We also check and correct mismatched symbol visibility here. The
4586 most restrictive visibility of the function descriptor and the
4587 function entry symbol is used. */
4588
4589 static bfd_boolean
4590 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4591 {
4592 struct ppc_link_hash_table *htab;
4593 struct ppc_link_hash_entry *fdh;
4594
4595 if (eh->elf.root.type == bfd_link_hash_indirect)
4596 return TRUE;
4597
4598 if (eh->elf.root.type == bfd_link_hash_warning)
4599 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4600
4601 if (eh->elf.root.root.string[0] != '.')
4602 abort ();
4603
4604 htab = ppc_hash_table (info);
4605 fdh = lookup_fdh (eh, htab);
4606 if (fdh == NULL)
4607 {
4608 if (!info->relocatable
4609 && (eh->elf.root.type == bfd_link_hash_undefined
4610 || eh->elf.root.type == bfd_link_hash_undefweak)
4611 && eh->elf.ref_regular)
4612 {
4613 /* Make an undefweak function descriptor sym, which is enough to
4614 pull in an --as-needed shared lib, but won't cause link
4615 errors. Archives are handled elsewhere. */
4616 fdh = make_fdh (info, eh);
4617 if (fdh == NULL)
4618 return FALSE;
4619 fdh->elf.ref_regular = 1;
4620 }
4621 }
4622 else
4623 {
4624 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4625 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4626 if (entry_vis < descr_vis)
4627 fdh->elf.other += entry_vis - descr_vis;
4628 else if (entry_vis > descr_vis)
4629 eh->elf.other += descr_vis - entry_vis;
4630
4631 if ((fdh->elf.root.type == bfd_link_hash_defined
4632 || fdh->elf.root.type == bfd_link_hash_defweak)
4633 && eh->elf.root.type == bfd_link_hash_undefined)
4634 {
4635 eh->elf.root.type = bfd_link_hash_undefweak;
4636 eh->was_undefined = 1;
4637 htab->twiddled_syms = 1;
4638 }
4639 }
4640
4641 return TRUE;
4642 }
4643
4644 /* Process list of dot-symbols we made in link_hash_newfunc. */
4645
4646 static bfd_boolean
4647 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4648 {
4649 struct ppc_link_hash_table *htab;
4650 struct ppc_link_hash_entry **p, *eh;
4651
4652 htab = ppc_hash_table (info);
4653 if (!is_ppc64_elf (info->output_bfd))
4654 return TRUE;
4655
4656 if (is_ppc64_elf (ibfd))
4657 {
4658 p = &htab->dot_syms;
4659 while ((eh = *p) != NULL)
4660 {
4661 *p = NULL;
4662 if (!add_symbol_adjust (eh, info))
4663 return FALSE;
4664 p = &eh->u.next_dot_sym;
4665 }
4666 }
4667
4668 /* Clear the list for non-ppc64 input files. */
4669 p = &htab->dot_syms;
4670 while ((eh = *p) != NULL)
4671 {
4672 *p = NULL;
4673 p = &eh->u.next_dot_sym;
4674 }
4675
4676 /* We need to fix the undefs list for any syms we have twiddled to
4677 undef_weak. */
4678 if (htab->twiddled_syms)
4679 {
4680 bfd_link_repair_undef_list (&htab->elf.root);
4681 htab->twiddled_syms = 0;
4682 }
4683 return TRUE;
4684 }
4685
4686 /* Undo hash table changes when an --as-needed input file is determined
4687 not to be needed. */
4688
4689 static bfd_boolean
4690 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4691 struct bfd_link_info *info)
4692 {
4693 ppc_hash_table (info)->dot_syms = NULL;
4694 return TRUE;
4695 }
4696
4697 static struct plt_entry **
4698 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4699 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4700 {
4701 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4702 struct plt_entry **local_plt;
4703 char *local_got_tls_masks;
4704
4705 if (local_got_ents == NULL)
4706 {
4707 bfd_size_type size = symtab_hdr->sh_info;
4708
4709 size *= (sizeof (*local_got_ents)
4710 + sizeof (*local_plt)
4711 + sizeof (*local_got_tls_masks));
4712 local_got_ents = bfd_zalloc (abfd, size);
4713 if (local_got_ents == NULL)
4714 return NULL;
4715 elf_local_got_ents (abfd) = local_got_ents;
4716 }
4717
4718 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4719 {
4720 struct got_entry *ent;
4721
4722 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4723 if (ent->addend == r_addend
4724 && ent->owner == abfd
4725 && ent->tls_type == tls_type)
4726 break;
4727 if (ent == NULL)
4728 {
4729 bfd_size_type amt = sizeof (*ent);
4730 ent = bfd_alloc (abfd, amt);
4731 if (ent == NULL)
4732 return FALSE;
4733 ent->next = local_got_ents[r_symndx];
4734 ent->addend = r_addend;
4735 ent->owner = abfd;
4736 ent->tls_type = tls_type;
4737 ent->got.refcount = 0;
4738 local_got_ents[r_symndx] = ent;
4739 }
4740 ent->got.refcount += 1;
4741 }
4742
4743 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4744 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
4745 local_got_tls_masks[r_symndx] |= tls_type;
4746
4747 return local_plt + r_symndx;
4748 }
4749
4750 static bfd_boolean
4751 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4752 {
4753 struct plt_entry *ent;
4754
4755 for (ent = *plist; ent != NULL; ent = ent->next)
4756 if (ent->addend == addend)
4757 break;
4758 if (ent == NULL)
4759 {
4760 bfd_size_type amt = sizeof (*ent);
4761 ent = bfd_alloc (abfd, amt);
4762 if (ent == NULL)
4763 return FALSE;
4764 ent->next = *plist;
4765 ent->addend = addend;
4766 ent->plt.refcount = 0;
4767 *plist = ent;
4768 }
4769 ent->plt.refcount += 1;
4770 return TRUE;
4771 }
4772
4773 static bfd_boolean
4774 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4775 {
4776 return (r_type == R_PPC64_REL24
4777 || r_type == R_PPC64_REL14
4778 || r_type == R_PPC64_REL14_BRTAKEN
4779 || r_type == R_PPC64_REL14_BRNTAKEN
4780 || r_type == R_PPC64_ADDR24
4781 || r_type == R_PPC64_ADDR14
4782 || r_type == R_PPC64_ADDR14_BRTAKEN
4783 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4784 }
4785
4786 /* Look through the relocs for a section during the first phase, and
4787 calculate needed space in the global offset table, procedure
4788 linkage table, and dynamic reloc sections. */
4789
4790 static bfd_boolean
4791 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4792 asection *sec, const Elf_Internal_Rela *relocs)
4793 {
4794 struct ppc_link_hash_table *htab;
4795 Elf_Internal_Shdr *symtab_hdr;
4796 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4797 const Elf_Internal_Rela *rel;
4798 const Elf_Internal_Rela *rel_end;
4799 asection *sreloc;
4800 asection **opd_sym_map;
4801 struct elf_link_hash_entry *tga, *dottga;
4802
4803 if (info->relocatable)
4804 return TRUE;
4805
4806 /* Don't do anything special with non-loaded, non-alloced sections.
4807 In particular, any relocs in such sections should not affect GOT
4808 and PLT reference counting (ie. we don't allow them to create GOT
4809 or PLT entries), there's no possibility or desire to optimize TLS
4810 relocs, and there's not much point in propagating relocs to shared
4811 libs that the dynamic linker won't relocate. */
4812 if ((sec->flags & SEC_ALLOC) == 0)
4813 return TRUE;
4814
4815 BFD_ASSERT (is_ppc64_elf (abfd));
4816
4817 htab = ppc_hash_table (info);
4818 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4819 FALSE, FALSE, TRUE);
4820 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4821 FALSE, FALSE, TRUE);
4822 symtab_hdr = &elf_symtab_hdr (abfd);
4823
4824 sym_hashes = elf_sym_hashes (abfd);
4825 sym_hashes_end = (sym_hashes
4826 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4827 - symtab_hdr->sh_info);
4828
4829 sreloc = NULL;
4830 opd_sym_map = NULL;
4831 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4832 {
4833 /* Garbage collection needs some extra help with .opd sections.
4834 We don't want to necessarily keep everything referenced by
4835 relocs in .opd, as that would keep all functions. Instead,
4836 if we reference an .opd symbol (a function descriptor), we
4837 want to keep the function code symbol's section. This is
4838 easy for global symbols, but for local syms we need to keep
4839 information about the associated function section. */
4840 bfd_size_type amt;
4841
4842 amt = sec->size * sizeof (*opd_sym_map) / 8;
4843 opd_sym_map = bfd_zalloc (abfd, amt);
4844 if (opd_sym_map == NULL)
4845 return FALSE;
4846 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4847 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4848 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4849 }
4850
4851 if (htab->sfpr == NULL
4852 && !create_linkage_sections (htab->elf.dynobj, info))
4853 return FALSE;
4854
4855 rel_end = relocs + sec->reloc_count;
4856 for (rel = relocs; rel < rel_end; rel++)
4857 {
4858 unsigned long r_symndx;
4859 struct elf_link_hash_entry *h;
4860 enum elf_ppc64_reloc_type r_type;
4861 int tls_type;
4862 struct _ppc64_elf_section_data *ppc64_sec;
4863 struct plt_entry **ifunc;
4864
4865 r_symndx = ELF64_R_SYM (rel->r_info);
4866 if (r_symndx < symtab_hdr->sh_info)
4867 h = NULL;
4868 else
4869 {
4870 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4871 h = elf_follow_link (h);
4872 }
4873
4874 tls_type = 0;
4875 ifunc = NULL;
4876 if (h != NULL)
4877 {
4878 if (h->type == STT_GNU_IFUNC)
4879 {
4880 h->needs_plt = 1;
4881 ifunc = &h->plt.plist;
4882 }
4883 }
4884 else
4885 {
4886 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4887 abfd, r_symndx);
4888 if (isym == NULL)
4889 return FALSE;
4890
4891 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4892 {
4893 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4894 rel->r_addend, PLT_IFUNC);
4895 if (ifunc == NULL)
4896 return FALSE;
4897 }
4898 }
4899 r_type = ELF64_R_TYPE (rel->r_info);
4900 if (is_branch_reloc (r_type))
4901 {
4902 if (h != NULL && (h == tga || h == dottga))
4903 {
4904 if (rel != relocs
4905 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4906 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4907 /* We have a new-style __tls_get_addr call with a marker
4908 reloc. */
4909 ;
4910 else
4911 /* Mark this section as having an old-style call. */
4912 sec->has_tls_get_addr_call = 1;
4913 }
4914
4915 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4916 if (ifunc != NULL
4917 && !update_plt_info (abfd, ifunc, rel->r_addend))
4918 return FALSE;
4919 }
4920
4921 switch (r_type)
4922 {
4923 case R_PPC64_TLSGD:
4924 case R_PPC64_TLSLD:
4925 /* These special tls relocs tie a call to __tls_get_addr with
4926 its parameter symbol. */
4927 break;
4928
4929 case R_PPC64_GOT_TLSLD16:
4930 case R_PPC64_GOT_TLSLD16_LO:
4931 case R_PPC64_GOT_TLSLD16_HI:
4932 case R_PPC64_GOT_TLSLD16_HA:
4933 tls_type = TLS_TLS | TLS_LD;
4934 goto dogottls;
4935
4936 case R_PPC64_GOT_TLSGD16:
4937 case R_PPC64_GOT_TLSGD16_LO:
4938 case R_PPC64_GOT_TLSGD16_HI:
4939 case R_PPC64_GOT_TLSGD16_HA:
4940 tls_type = TLS_TLS | TLS_GD;
4941 goto dogottls;
4942
4943 case R_PPC64_GOT_TPREL16_DS:
4944 case R_PPC64_GOT_TPREL16_LO_DS:
4945 case R_PPC64_GOT_TPREL16_HI:
4946 case R_PPC64_GOT_TPREL16_HA:
4947 if (!info->executable)
4948 info->flags |= DF_STATIC_TLS;
4949 tls_type = TLS_TLS | TLS_TPREL;
4950 goto dogottls;
4951
4952 case R_PPC64_GOT_DTPREL16_DS:
4953 case R_PPC64_GOT_DTPREL16_LO_DS:
4954 case R_PPC64_GOT_DTPREL16_HI:
4955 case R_PPC64_GOT_DTPREL16_HA:
4956 tls_type = TLS_TLS | TLS_DTPREL;
4957 dogottls:
4958 sec->has_tls_reloc = 1;
4959 /* Fall thru */
4960
4961 case R_PPC64_GOT16:
4962 case R_PPC64_GOT16_DS:
4963 case R_PPC64_GOT16_HA:
4964 case R_PPC64_GOT16_HI:
4965 case R_PPC64_GOT16_LO:
4966 case R_PPC64_GOT16_LO_DS:
4967 /* This symbol requires a global offset table entry. */
4968 sec->has_toc_reloc = 1;
4969 if (ppc64_elf_tdata (abfd)->got == NULL
4970 && !create_got_section (abfd, info))
4971 return FALSE;
4972
4973 if (h != NULL)
4974 {
4975 struct ppc_link_hash_entry *eh;
4976 struct got_entry *ent;
4977
4978 eh = (struct ppc_link_hash_entry *) h;
4979 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4980 if (ent->addend == rel->r_addend
4981 && ent->owner == abfd
4982 && ent->tls_type == tls_type)
4983 break;
4984 if (ent == NULL)
4985 {
4986 bfd_size_type amt = sizeof (*ent);
4987 ent = bfd_alloc (abfd, amt);
4988 if (ent == NULL)
4989 return FALSE;
4990 ent->next = eh->elf.got.glist;
4991 ent->addend = rel->r_addend;
4992 ent->owner = abfd;
4993 ent->tls_type = tls_type;
4994 ent->got.refcount = 0;
4995 eh->elf.got.glist = ent;
4996 }
4997 ent->got.refcount += 1;
4998 eh->tls_mask |= tls_type;
4999 }
5000 else
5001 /* This is a global offset table entry for a local symbol. */
5002 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5003 rel->r_addend, tls_type))
5004 return FALSE;
5005 break;
5006
5007 case R_PPC64_PLT16_HA:
5008 case R_PPC64_PLT16_HI:
5009 case R_PPC64_PLT16_LO:
5010 case R_PPC64_PLT32:
5011 case R_PPC64_PLT64:
5012 /* This symbol requires a procedure linkage table entry. We
5013 actually build the entry in adjust_dynamic_symbol,
5014 because this might be a case of linking PIC code without
5015 linking in any dynamic objects, in which case we don't
5016 need to generate a procedure linkage table after all. */
5017 if (h == NULL)
5018 {
5019 /* It does not make sense to have a procedure linkage
5020 table entry for a local symbol. */
5021 bfd_set_error (bfd_error_bad_value);
5022 return FALSE;
5023 }
5024 else
5025 {
5026 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5027 return FALSE;
5028 h->needs_plt = 1;
5029 if (h->root.root.string[0] == '.'
5030 && h->root.root.string[1] != '\0')
5031 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5032 }
5033 break;
5034
5035 /* The following relocations don't need to propagate the
5036 relocation if linking a shared object since they are
5037 section relative. */
5038 case R_PPC64_SECTOFF:
5039 case R_PPC64_SECTOFF_LO:
5040 case R_PPC64_SECTOFF_HI:
5041 case R_PPC64_SECTOFF_HA:
5042 case R_PPC64_SECTOFF_DS:
5043 case R_PPC64_SECTOFF_LO_DS:
5044 case R_PPC64_DTPREL16:
5045 case R_PPC64_DTPREL16_LO:
5046 case R_PPC64_DTPREL16_HI:
5047 case R_PPC64_DTPREL16_HA:
5048 case R_PPC64_DTPREL16_DS:
5049 case R_PPC64_DTPREL16_LO_DS:
5050 case R_PPC64_DTPREL16_HIGHER:
5051 case R_PPC64_DTPREL16_HIGHERA:
5052 case R_PPC64_DTPREL16_HIGHEST:
5053 case R_PPC64_DTPREL16_HIGHESTA:
5054 break;
5055
5056 /* Nor do these. */
5057 case R_PPC64_REL16:
5058 case R_PPC64_REL16_LO:
5059 case R_PPC64_REL16_HI:
5060 case R_PPC64_REL16_HA:
5061 break;
5062
5063 case R_PPC64_TOC16:
5064 case R_PPC64_TOC16_LO:
5065 case R_PPC64_TOC16_HI:
5066 case R_PPC64_TOC16_HA:
5067 case R_PPC64_TOC16_DS:
5068 case R_PPC64_TOC16_LO_DS:
5069 sec->has_toc_reloc = 1;
5070 break;
5071
5072 /* This relocation describes the C++ object vtable hierarchy.
5073 Reconstruct it for later use during GC. */
5074 case R_PPC64_GNU_VTINHERIT:
5075 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5076 return FALSE;
5077 break;
5078
5079 /* This relocation describes which C++ vtable entries are actually
5080 used. Record for later use during GC. */
5081 case R_PPC64_GNU_VTENTRY:
5082 BFD_ASSERT (h != NULL);
5083 if (h != NULL
5084 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5085 return FALSE;
5086 break;
5087
5088 case R_PPC64_REL14:
5089 case R_PPC64_REL14_BRTAKEN:
5090 case R_PPC64_REL14_BRNTAKEN:
5091 {
5092 asection *dest = NULL;
5093
5094 /* Heuristic: If jumping outside our section, chances are
5095 we are going to need a stub. */
5096 if (h != NULL)
5097 {
5098 /* If the sym is weak it may be overridden later, so
5099 don't assume we know where a weak sym lives. */
5100 if (h->root.type == bfd_link_hash_defined)
5101 dest = h->root.u.def.section;
5102 }
5103 else
5104 {
5105 Elf_Internal_Sym *isym;
5106
5107 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5108 abfd, r_symndx);
5109 if (isym == NULL)
5110 return FALSE;
5111
5112 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5113 }
5114
5115 if (dest != sec)
5116 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5117 }
5118 /* Fall through. */
5119
5120 case R_PPC64_REL24:
5121 if (h != NULL && ifunc == NULL)
5122 {
5123 /* We may need a .plt entry if the function this reloc
5124 refers to is in a shared lib. */
5125 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5126 return FALSE;
5127 h->needs_plt = 1;
5128 if (h->root.root.string[0] == '.'
5129 && h->root.root.string[1] != '\0')
5130 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5131 if (h == tga || h == dottga)
5132 sec->has_tls_reloc = 1;
5133 }
5134 break;
5135
5136 case R_PPC64_TPREL64:
5137 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5138 if (!info->executable)
5139 info->flags |= DF_STATIC_TLS;
5140 goto dotlstoc;
5141
5142 case R_PPC64_DTPMOD64:
5143 if (rel + 1 < rel_end
5144 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5145 && rel[1].r_offset == rel->r_offset + 8)
5146 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5147 else
5148 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5149 goto dotlstoc;
5150
5151 case R_PPC64_DTPREL64:
5152 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5153 if (rel != relocs
5154 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5155 && rel[-1].r_offset == rel->r_offset - 8)
5156 /* This is the second reloc of a dtpmod, dtprel pair.
5157 Don't mark with TLS_DTPREL. */
5158 goto dodyn;
5159
5160 dotlstoc:
5161 sec->has_tls_reloc = 1;
5162 if (h != NULL)
5163 {
5164 struct ppc_link_hash_entry *eh;
5165 eh = (struct ppc_link_hash_entry *) h;
5166 eh->tls_mask |= tls_type;
5167 }
5168 else
5169 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5170 rel->r_addend, tls_type))
5171 return FALSE;
5172
5173 ppc64_sec = ppc64_elf_section_data (sec);
5174 if (ppc64_sec->sec_type != sec_toc)
5175 {
5176 bfd_size_type amt;
5177
5178 /* One extra to simplify get_tls_mask. */
5179 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5180 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5181 if (ppc64_sec->u.toc.symndx == NULL)
5182 return FALSE;
5183 amt = sec->size * sizeof (bfd_vma) / 8;
5184 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5185 if (ppc64_sec->u.toc.add == NULL)
5186 return FALSE;
5187 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5188 ppc64_sec->sec_type = sec_toc;
5189 }
5190 BFD_ASSERT (rel->r_offset % 8 == 0);
5191 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5192 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5193
5194 /* Mark the second slot of a GD or LD entry.
5195 -1 to indicate GD and -2 to indicate LD. */
5196 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5197 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5198 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5199 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5200 goto dodyn;
5201
5202 case R_PPC64_TPREL16:
5203 case R_PPC64_TPREL16_LO:
5204 case R_PPC64_TPREL16_HI:
5205 case R_PPC64_TPREL16_HA:
5206 case R_PPC64_TPREL16_DS:
5207 case R_PPC64_TPREL16_LO_DS:
5208 case R_PPC64_TPREL16_HIGHER:
5209 case R_PPC64_TPREL16_HIGHERA:
5210 case R_PPC64_TPREL16_HIGHEST:
5211 case R_PPC64_TPREL16_HIGHESTA:
5212 if (info->shared)
5213 {
5214 if (!info->executable)
5215 info->flags |= DF_STATIC_TLS;
5216 goto dodyn;
5217 }
5218 break;
5219
5220 case R_PPC64_ADDR64:
5221 if (opd_sym_map != NULL
5222 && rel + 1 < rel_end
5223 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5224 {
5225 if (h != NULL)
5226 {
5227 if (h->root.root.string[0] == '.'
5228 && h->root.root.string[1] != 0
5229 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5230 ;
5231 else
5232 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5233 }
5234 else
5235 {
5236 asection *s;
5237 Elf_Internal_Sym *isym;
5238
5239 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5240 abfd, r_symndx);
5241 if (isym == NULL)
5242 return FALSE;
5243
5244 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5245 if (s != NULL && s != sec)
5246 opd_sym_map[rel->r_offset / 8] = s;
5247 }
5248 }
5249 /* Fall through. */
5250
5251 case R_PPC64_REL30:
5252 case R_PPC64_REL32:
5253 case R_PPC64_REL64:
5254 case R_PPC64_ADDR14:
5255 case R_PPC64_ADDR14_BRNTAKEN:
5256 case R_PPC64_ADDR14_BRTAKEN:
5257 case R_PPC64_ADDR16:
5258 case R_PPC64_ADDR16_DS:
5259 case R_PPC64_ADDR16_HA:
5260 case R_PPC64_ADDR16_HI:
5261 case R_PPC64_ADDR16_HIGHER:
5262 case R_PPC64_ADDR16_HIGHERA:
5263 case R_PPC64_ADDR16_HIGHEST:
5264 case R_PPC64_ADDR16_HIGHESTA:
5265 case R_PPC64_ADDR16_LO:
5266 case R_PPC64_ADDR16_LO_DS:
5267 case R_PPC64_ADDR24:
5268 case R_PPC64_ADDR32:
5269 case R_PPC64_UADDR16:
5270 case R_PPC64_UADDR32:
5271 case R_PPC64_UADDR64:
5272 case R_PPC64_TOC:
5273 if (h != NULL && !info->shared)
5274 /* We may need a copy reloc. */
5275 h->non_got_ref = 1;
5276
5277 /* Don't propagate .opd relocs. */
5278 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5279 break;
5280
5281 /* If we are creating a shared library, and this is a reloc
5282 against a global symbol, or a non PC relative reloc
5283 against a local symbol, then we need to copy the reloc
5284 into the shared library. However, if we are linking with
5285 -Bsymbolic, we do not need to copy a reloc against a
5286 global symbol which is defined in an object we are
5287 including in the link (i.e., DEF_REGULAR is set). At
5288 this point we have not seen all the input files, so it is
5289 possible that DEF_REGULAR is not set now but will be set
5290 later (it is never cleared). In case of a weak definition,
5291 DEF_REGULAR may be cleared later by a strong definition in
5292 a shared library. We account for that possibility below by
5293 storing information in the dyn_relocs field of the hash
5294 table entry. A similar situation occurs when creating
5295 shared libraries and symbol visibility changes render the
5296 symbol local.
5297
5298 If on the other hand, we are creating an executable, we
5299 may need to keep relocations for symbols satisfied by a
5300 dynamic library if we manage to avoid copy relocs for the
5301 symbol. */
5302 dodyn:
5303 if ((info->shared
5304 && (must_be_dyn_reloc (info, r_type)
5305 || (h != NULL
5306 && (! info->symbolic
5307 || h->root.type == bfd_link_hash_defweak
5308 || !h->def_regular))))
5309 || (ELIMINATE_COPY_RELOCS
5310 && !info->shared
5311 && h != NULL
5312 && (h->root.type == bfd_link_hash_defweak
5313 || !h->def_regular))
5314 || (!info->shared
5315 && ifunc != NULL))
5316 {
5317 struct ppc_dyn_relocs *p;
5318 struct ppc_dyn_relocs **head;
5319
5320 /* We must copy these reloc types into the output file.
5321 Create a reloc section in dynobj and make room for
5322 this reloc. */
5323 if (sreloc == NULL)
5324 {
5325 sreloc = _bfd_elf_make_dynamic_reloc_section
5326 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5327
5328 if (sreloc == NULL)
5329 return FALSE;
5330 }
5331
5332 /* If this is a global symbol, we count the number of
5333 relocations we need for this symbol. */
5334 if (h != NULL)
5335 {
5336 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5337 }
5338 else
5339 {
5340 /* Track dynamic relocs needed for local syms too.
5341 We really need local syms available to do this
5342 easily. Oh well. */
5343 asection *s;
5344 void *vpp;
5345 Elf_Internal_Sym *isym;
5346
5347 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5348 abfd, r_symndx);
5349 if (isym == NULL)
5350 return FALSE;
5351
5352 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5353 if (s == NULL)
5354 s = sec;
5355
5356 vpp = &elf_section_data (s)->local_dynrel;
5357 head = (struct ppc_dyn_relocs **) vpp;
5358 }
5359
5360 p = *head;
5361 if (p == NULL || p->sec != sec)
5362 {
5363 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5364 if (p == NULL)
5365 return FALSE;
5366 p->next = *head;
5367 *head = p;
5368 p->sec = sec;
5369 p->count = 0;
5370 p->pc_count = 0;
5371 }
5372
5373 p->count += 1;
5374 if (!must_be_dyn_reloc (info, r_type))
5375 p->pc_count += 1;
5376 }
5377 break;
5378
5379 default:
5380 break;
5381 }
5382 }
5383
5384 return TRUE;
5385 }
5386
5387 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5388 of the code entry point, and its section. */
5389
5390 static bfd_vma
5391 opd_entry_value (asection *opd_sec,
5392 bfd_vma offset,
5393 asection **code_sec,
5394 bfd_vma *code_off)
5395 {
5396 bfd *opd_bfd = opd_sec->owner;
5397 Elf_Internal_Rela *relocs;
5398 Elf_Internal_Rela *lo, *hi, *look;
5399 bfd_vma val;
5400
5401 /* No relocs implies we are linking a --just-symbols object. */
5402 if (opd_sec->reloc_count == 0)
5403 {
5404 bfd_vma val;
5405
5406 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5407 return (bfd_vma) -1;
5408
5409 if (code_sec != NULL)
5410 {
5411 asection *sec, *likely = NULL;
5412 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5413 if (sec->vma <= val
5414 && (sec->flags & SEC_LOAD) != 0
5415 && (sec->flags & SEC_ALLOC) != 0)
5416 likely = sec;
5417 if (likely != NULL)
5418 {
5419 *code_sec = likely;
5420 if (code_off != NULL)
5421 *code_off = val - likely->vma;
5422 }
5423 }
5424 return val;
5425 }
5426
5427 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5428
5429 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5430 if (relocs == NULL)
5431 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5432
5433 /* Go find the opd reloc at the sym address. */
5434 lo = relocs;
5435 BFD_ASSERT (lo != NULL);
5436 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5437 val = (bfd_vma) -1;
5438 while (lo < hi)
5439 {
5440 look = lo + (hi - lo) / 2;
5441 if (look->r_offset < offset)
5442 lo = look + 1;
5443 else if (look->r_offset > offset)
5444 hi = look;
5445 else
5446 {
5447 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5448
5449 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5450 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5451 {
5452 unsigned long symndx = ELF64_R_SYM (look->r_info);
5453 asection *sec;
5454
5455 if (symndx < symtab_hdr->sh_info)
5456 {
5457 Elf_Internal_Sym *sym;
5458
5459 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5460 if (sym == NULL)
5461 {
5462 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5463 symtab_hdr->sh_info,
5464 0, NULL, NULL, NULL);
5465 if (sym == NULL)
5466 break;
5467 symtab_hdr->contents = (bfd_byte *) sym;
5468 }
5469
5470 sym += symndx;
5471 val = sym->st_value;
5472 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5473 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5474 }
5475 else
5476 {
5477 struct elf_link_hash_entry **sym_hashes;
5478 struct elf_link_hash_entry *rh;
5479
5480 sym_hashes = elf_sym_hashes (opd_bfd);
5481 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5482 rh = elf_follow_link (rh);
5483 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5484 || rh->root.type == bfd_link_hash_defweak);
5485 val = rh->root.u.def.value;
5486 sec = rh->root.u.def.section;
5487 }
5488 val += look->r_addend;
5489 if (code_off != NULL)
5490 *code_off = val;
5491 if (code_sec != NULL)
5492 *code_sec = sec;
5493 if (sec != NULL && sec->output_section != NULL)
5494 val += sec->output_section->vma + sec->output_offset;
5495 }
5496 break;
5497 }
5498 }
5499
5500 return val;
5501 }
5502
5503 /* If FDH is a function descriptor symbol, return the associated code
5504 entry symbol if it is defined. Return NULL otherwise. */
5505
5506 static struct ppc_link_hash_entry *
5507 defined_code_entry (struct ppc_link_hash_entry *fdh)
5508 {
5509 if (fdh->is_func_descriptor)
5510 {
5511 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5512 if (fh->elf.root.type == bfd_link_hash_defined
5513 || fh->elf.root.type == bfd_link_hash_defweak)
5514 return fh;
5515 }
5516 return NULL;
5517 }
5518
5519 /* If FH is a function code entry symbol, return the associated
5520 function descriptor symbol if it is defined. Return NULL otherwise. */
5521
5522 static struct ppc_link_hash_entry *
5523 defined_func_desc (struct ppc_link_hash_entry *fh)
5524 {
5525 if (fh->oh != NULL
5526 && fh->oh->is_func_descriptor)
5527 {
5528 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5529 if (fdh->elf.root.type == bfd_link_hash_defined
5530 || fdh->elf.root.type == bfd_link_hash_defweak)
5531 return fdh;
5532 }
5533 return NULL;
5534 }
5535
5536 /* Mark all our entry sym sections, both opd and code section. */
5537
5538 static void
5539 ppc64_elf_gc_keep (struct bfd_link_info *info)
5540 {
5541 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5542 struct bfd_sym_chain *sym;
5543
5544 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5545 {
5546 struct ppc_link_hash_entry *eh, *fh;
5547 asection *sec;
5548
5549 eh = (struct ppc_link_hash_entry *)
5550 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5551 if (eh == NULL)
5552 continue;
5553 if (eh->elf.root.type != bfd_link_hash_defined
5554 && eh->elf.root.type != bfd_link_hash_defweak)
5555 continue;
5556
5557 fh = defined_code_entry (eh);
5558 if (fh != NULL)
5559 {
5560 sec = fh->elf.root.u.def.section;
5561 sec->flags |= SEC_KEEP;
5562 }
5563 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5564 && opd_entry_value (eh->elf.root.u.def.section,
5565 eh->elf.root.u.def.value,
5566 &sec, NULL) != (bfd_vma) -1)
5567 sec->flags |= SEC_KEEP;
5568
5569 sec = eh->elf.root.u.def.section;
5570 sec->flags |= SEC_KEEP;
5571 }
5572 }
5573
5574 /* Mark sections containing dynamically referenced symbols. When
5575 building shared libraries, we must assume that any visible symbol is
5576 referenced. */
5577
5578 static bfd_boolean
5579 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5580 {
5581 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5582 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5583 struct ppc_link_hash_entry *fdh;
5584
5585 if (eh->elf.root.type == bfd_link_hash_warning)
5586 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5587
5588 /* Dynamic linking info is on the func descriptor sym. */
5589 fdh = defined_func_desc (eh);
5590 if (fdh != NULL)
5591 eh = fdh;
5592
5593 if ((eh->elf.root.type == bfd_link_hash_defined
5594 || eh->elf.root.type == bfd_link_hash_defweak)
5595 && (eh->elf.ref_dynamic
5596 || (!info->executable
5597 && eh->elf.def_regular
5598 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5599 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5600 {
5601 asection *code_sec;
5602 struct ppc_link_hash_entry *fh;
5603
5604 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5605
5606 /* Function descriptor syms cause the associated
5607 function code sym section to be marked. */
5608 fh = defined_code_entry (eh);
5609 if (fh != NULL)
5610 {
5611 code_sec = fh->elf.root.u.def.section;
5612 code_sec->flags |= SEC_KEEP;
5613 }
5614 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5615 && opd_entry_value (eh->elf.root.u.def.section,
5616 eh->elf.root.u.def.value,
5617 &code_sec, NULL) != (bfd_vma) -1)
5618 code_sec->flags |= SEC_KEEP;
5619 }
5620
5621 return TRUE;
5622 }
5623
5624 /* Return the section that should be marked against GC for a given
5625 relocation. */
5626
5627 static asection *
5628 ppc64_elf_gc_mark_hook (asection *sec,
5629 struct bfd_link_info *info ATTRIBUTE_UNUSED,
5630 Elf_Internal_Rela *rel,
5631 struct elf_link_hash_entry *h,
5632 Elf_Internal_Sym *sym)
5633 {
5634 asection *rsec;
5635
5636 /* Syms return NULL if we're marking .opd, so we avoid marking all
5637 function sections, as all functions are referenced in .opd. */
5638 rsec = NULL;
5639 if (get_opd_info (sec) != NULL)
5640 return rsec;
5641
5642 if (h != NULL)
5643 {
5644 enum elf_ppc64_reloc_type r_type;
5645 struct ppc_link_hash_entry *eh, *fh, *fdh;
5646
5647 r_type = ELF64_R_TYPE (rel->r_info);
5648 switch (r_type)
5649 {
5650 case R_PPC64_GNU_VTINHERIT:
5651 case R_PPC64_GNU_VTENTRY:
5652 break;
5653
5654 default:
5655 switch (h->root.type)
5656 {
5657 case bfd_link_hash_defined:
5658 case bfd_link_hash_defweak:
5659 eh = (struct ppc_link_hash_entry *) h;
5660 fdh = defined_func_desc (eh);
5661 if (fdh != NULL)
5662 eh = fdh;
5663
5664 /* Function descriptor syms cause the associated
5665 function code sym section to be marked. */
5666 fh = defined_code_entry (eh);
5667 if (fh != NULL)
5668 {
5669 /* They also mark their opd section. */
5670 eh->elf.root.u.def.section->gc_mark = 1;
5671
5672 rsec = fh->elf.root.u.def.section;
5673 }
5674 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5675 && opd_entry_value (eh->elf.root.u.def.section,
5676 eh->elf.root.u.def.value,
5677 &rsec, NULL) != (bfd_vma) -1)
5678 eh->elf.root.u.def.section->gc_mark = 1;
5679 else
5680 rsec = h->root.u.def.section;
5681 break;
5682
5683 case bfd_link_hash_common:
5684 rsec = h->root.u.c.p->section;
5685 break;
5686
5687 default:
5688 break;
5689 }
5690 }
5691 }
5692 else
5693 {
5694 struct _opd_sec_data *opd;
5695
5696 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5697 opd = get_opd_info (rsec);
5698 if (opd != NULL && opd->func_sec != NULL)
5699 {
5700 rsec->gc_mark = 1;
5701
5702 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5703 }
5704 }
5705
5706 return rsec;
5707 }
5708
5709 /* Update the .got, .plt. and dynamic reloc reference counts for the
5710 section being removed. */
5711
5712 static bfd_boolean
5713 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5714 asection *sec, const Elf_Internal_Rela *relocs)
5715 {
5716 struct ppc_link_hash_table *htab;
5717 Elf_Internal_Shdr *symtab_hdr;
5718 struct elf_link_hash_entry **sym_hashes;
5719 struct got_entry **local_got_ents;
5720 const Elf_Internal_Rela *rel, *relend;
5721
5722 if (info->relocatable)
5723 return TRUE;
5724
5725 if ((sec->flags & SEC_ALLOC) == 0)
5726 return TRUE;
5727
5728 elf_section_data (sec)->local_dynrel = NULL;
5729
5730 htab = ppc_hash_table (info);
5731 symtab_hdr = &elf_symtab_hdr (abfd);
5732 sym_hashes = elf_sym_hashes (abfd);
5733 local_got_ents = elf_local_got_ents (abfd);
5734
5735 relend = relocs + sec->reloc_count;
5736 for (rel = relocs; rel < relend; rel++)
5737 {
5738 unsigned long r_symndx;
5739 enum elf_ppc64_reloc_type r_type;
5740 struct elf_link_hash_entry *h = NULL;
5741 char tls_type = 0;
5742
5743 r_symndx = ELF64_R_SYM (rel->r_info);
5744 r_type = ELF64_R_TYPE (rel->r_info);
5745 if (r_symndx >= symtab_hdr->sh_info)
5746 {
5747 struct ppc_link_hash_entry *eh;
5748 struct ppc_dyn_relocs **pp;
5749 struct ppc_dyn_relocs *p;
5750
5751 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5752 h = elf_follow_link (h);
5753 eh = (struct ppc_link_hash_entry *) h;
5754
5755 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5756 if (p->sec == sec)
5757 {
5758 /* Everything must go for SEC. */
5759 *pp = p->next;
5760 break;
5761 }
5762 }
5763
5764 if (is_branch_reloc (r_type))
5765 {
5766 struct plt_entry **ifunc = NULL;
5767 if (h != NULL)
5768 {
5769 if (h->type == STT_GNU_IFUNC)
5770 ifunc = &h->plt.plist;
5771 }
5772 else if (local_got_ents != NULL)
5773 {
5774 struct plt_entry **local_plt = (struct plt_entry **)
5775 (local_got_ents + symtab_hdr->sh_info);
5776 char *local_got_tls_masks = (char *)
5777 (local_plt + symtab_hdr->sh_info);
5778 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5779 ifunc = local_plt + r_symndx;
5780 }
5781 if (ifunc != NULL)
5782 {
5783 struct plt_entry *ent;
5784
5785 for (ent = *ifunc; ent != NULL; ent = ent->next)
5786 if (ent->addend == rel->r_addend)
5787 break;
5788 if (ent == NULL)
5789 abort ();
5790 if (ent->plt.refcount > 0)
5791 ent->plt.refcount -= 1;
5792 continue;
5793 }
5794 }
5795
5796 switch (r_type)
5797 {
5798 case R_PPC64_GOT_TLSLD16:
5799 case R_PPC64_GOT_TLSLD16_LO:
5800 case R_PPC64_GOT_TLSLD16_HI:
5801 case R_PPC64_GOT_TLSLD16_HA:
5802 tls_type = TLS_TLS | TLS_LD;
5803 goto dogot;
5804
5805 case R_PPC64_GOT_TLSGD16:
5806 case R_PPC64_GOT_TLSGD16_LO:
5807 case R_PPC64_GOT_TLSGD16_HI:
5808 case R_PPC64_GOT_TLSGD16_HA:
5809 tls_type = TLS_TLS | TLS_GD;
5810 goto dogot;
5811
5812 case R_PPC64_GOT_TPREL16_DS:
5813 case R_PPC64_GOT_TPREL16_LO_DS:
5814 case R_PPC64_GOT_TPREL16_HI:
5815 case R_PPC64_GOT_TPREL16_HA:
5816 tls_type = TLS_TLS | TLS_TPREL;
5817 goto dogot;
5818
5819 case R_PPC64_GOT_DTPREL16_DS:
5820 case R_PPC64_GOT_DTPREL16_LO_DS:
5821 case R_PPC64_GOT_DTPREL16_HI:
5822 case R_PPC64_GOT_DTPREL16_HA:
5823 tls_type = TLS_TLS | TLS_DTPREL;
5824 goto dogot;
5825
5826 case R_PPC64_GOT16:
5827 case R_PPC64_GOT16_DS:
5828 case R_PPC64_GOT16_HA:
5829 case R_PPC64_GOT16_HI:
5830 case R_PPC64_GOT16_LO:
5831 case R_PPC64_GOT16_LO_DS:
5832 dogot:
5833 {
5834 struct got_entry *ent;
5835
5836 if (h != NULL)
5837 ent = h->got.glist;
5838 else
5839 ent = local_got_ents[r_symndx];
5840
5841 for (; ent != NULL; ent = ent->next)
5842 if (ent->addend == rel->r_addend
5843 && ent->owner == abfd
5844 && ent->tls_type == tls_type)
5845 break;
5846 if (ent == NULL)
5847 abort ();
5848 if (ent->got.refcount > 0)
5849 ent->got.refcount -= 1;
5850 }
5851 break;
5852
5853 case R_PPC64_PLT16_HA:
5854 case R_PPC64_PLT16_HI:
5855 case R_PPC64_PLT16_LO:
5856 case R_PPC64_PLT32:
5857 case R_PPC64_PLT64:
5858 case R_PPC64_REL14:
5859 case R_PPC64_REL14_BRNTAKEN:
5860 case R_PPC64_REL14_BRTAKEN:
5861 case R_PPC64_REL24:
5862 if (h != NULL)
5863 {
5864 struct plt_entry *ent;
5865
5866 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5867 if (ent->addend == rel->r_addend)
5868 break;
5869 if (ent == NULL)
5870 abort ();
5871 if (ent->plt.refcount > 0)
5872 ent->plt.refcount -= 1;
5873 }
5874 break;
5875
5876 default:
5877 break;
5878 }
5879 }
5880 return TRUE;
5881 }
5882
5883 /* The maximum size of .sfpr. */
5884 #define SFPR_MAX (218*4)
5885
5886 struct sfpr_def_parms
5887 {
5888 const char name[12];
5889 unsigned char lo, hi;
5890 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5891 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5892 };
5893
5894 /* Auto-generate _save*, _rest* functions in .sfpr. */
5895
5896 static unsigned int
5897 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5898 {
5899 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5900 unsigned int i;
5901 size_t len = strlen (parm->name);
5902 bfd_boolean writing = FALSE;
5903 char sym[16];
5904
5905 memcpy (sym, parm->name, len);
5906 sym[len + 2] = 0;
5907
5908 for (i = parm->lo; i <= parm->hi; i++)
5909 {
5910 struct elf_link_hash_entry *h;
5911
5912 sym[len + 0] = i / 10 + '0';
5913 sym[len + 1] = i % 10 + '0';
5914 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5915 if (h != NULL
5916 && !h->def_regular)
5917 {
5918 h->root.type = bfd_link_hash_defined;
5919 h->root.u.def.section = htab->sfpr;
5920 h->root.u.def.value = htab->sfpr->size;
5921 h->type = STT_FUNC;
5922 h->def_regular = 1;
5923 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5924 writing = TRUE;
5925 if (htab->sfpr->contents == NULL)
5926 {
5927 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5928 if (htab->sfpr->contents == NULL)
5929 return FALSE;
5930 }
5931 }
5932 if (writing)
5933 {
5934 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5935 if (i != parm->hi)
5936 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5937 else
5938 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5939 htab->sfpr->size = p - htab->sfpr->contents;
5940 }
5941 }
5942
5943 return TRUE;
5944 }
5945
5946 static bfd_byte *
5947 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5948 {
5949 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5950 return p + 4;
5951 }
5952
5953 static bfd_byte *
5954 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5955 {
5956 p = savegpr0 (abfd, p, r);
5957 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5958 p = p + 4;
5959 bfd_put_32 (abfd, BLR, p);
5960 return p + 4;
5961 }
5962
5963 static bfd_byte *
5964 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5965 {
5966 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5967 return p + 4;
5968 }
5969
5970 static bfd_byte *
5971 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5972 {
5973 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5974 p = p + 4;
5975 p = restgpr0 (abfd, p, r);
5976 bfd_put_32 (abfd, MTLR_R0, p);
5977 p = p + 4;
5978 if (r == 29)
5979 {
5980 p = restgpr0 (abfd, p, 30);
5981 p = restgpr0 (abfd, p, 31);
5982 }
5983 bfd_put_32 (abfd, BLR, p);
5984 return p + 4;
5985 }
5986
5987 static bfd_byte *
5988 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5989 {
5990 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5991 return p + 4;
5992 }
5993
5994 static bfd_byte *
5995 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5996 {
5997 p = savegpr1 (abfd, p, r);
5998 bfd_put_32 (abfd, BLR, p);
5999 return p + 4;
6000 }
6001
6002 static bfd_byte *
6003 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6004 {
6005 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6006 return p + 4;
6007 }
6008
6009 static bfd_byte *
6010 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6011 {
6012 p = restgpr1 (abfd, p, r);
6013 bfd_put_32 (abfd, BLR, p);
6014 return p + 4;
6015 }
6016
6017 static bfd_byte *
6018 savefpr (bfd *abfd, bfd_byte *p, int r)
6019 {
6020 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6021 return p + 4;
6022 }
6023
6024 static bfd_byte *
6025 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6026 {
6027 p = savefpr (abfd, p, r);
6028 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6029 p = p + 4;
6030 bfd_put_32 (abfd, BLR, p);
6031 return p + 4;
6032 }
6033
6034 static bfd_byte *
6035 restfpr (bfd *abfd, bfd_byte *p, int r)
6036 {
6037 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6038 return p + 4;
6039 }
6040
6041 static bfd_byte *
6042 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6043 {
6044 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6045 p = p + 4;
6046 p = restfpr (abfd, p, r);
6047 bfd_put_32 (abfd, MTLR_R0, p);
6048 p = p + 4;
6049 if (r == 29)
6050 {
6051 p = restfpr (abfd, p, 30);
6052 p = restfpr (abfd, p, 31);
6053 }
6054 bfd_put_32 (abfd, BLR, p);
6055 return p + 4;
6056 }
6057
6058 static bfd_byte *
6059 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6060 {
6061 p = savefpr (abfd, p, r);
6062 bfd_put_32 (abfd, BLR, p);
6063 return p + 4;
6064 }
6065
6066 static bfd_byte *
6067 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6068 {
6069 p = restfpr (abfd, p, r);
6070 bfd_put_32 (abfd, BLR, p);
6071 return p + 4;
6072 }
6073
6074 static bfd_byte *
6075 savevr (bfd *abfd, bfd_byte *p, int r)
6076 {
6077 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6078 p = p + 4;
6079 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6080 return p + 4;
6081 }
6082
6083 static bfd_byte *
6084 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6085 {
6086 p = savevr (abfd, p, r);
6087 bfd_put_32 (abfd, BLR, p);
6088 return p + 4;
6089 }
6090
6091 static bfd_byte *
6092 restvr (bfd *abfd, bfd_byte *p, int r)
6093 {
6094 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6095 p = p + 4;
6096 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6097 return p + 4;
6098 }
6099
6100 static bfd_byte *
6101 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6102 {
6103 p = restvr (abfd, p, r);
6104 bfd_put_32 (abfd, BLR, p);
6105 return p + 4;
6106 }
6107
6108 /* Called via elf_link_hash_traverse to transfer dynamic linking
6109 information on function code symbol entries to their corresponding
6110 function descriptor symbol entries. */
6111
6112 static bfd_boolean
6113 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6114 {
6115 struct bfd_link_info *info;
6116 struct ppc_link_hash_table *htab;
6117 struct plt_entry *ent;
6118 struct ppc_link_hash_entry *fh;
6119 struct ppc_link_hash_entry *fdh;
6120 bfd_boolean force_local;
6121
6122 fh = (struct ppc_link_hash_entry *) h;
6123 if (fh->elf.root.type == bfd_link_hash_indirect)
6124 return TRUE;
6125
6126 if (fh->elf.root.type == bfd_link_hash_warning)
6127 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6128
6129 info = inf;
6130 htab = ppc_hash_table (info);
6131
6132 /* Resolve undefined references to dot-symbols as the value
6133 in the function descriptor, if we have one in a regular object.
6134 This is to satisfy cases like ".quad .foo". Calls to functions
6135 in dynamic objects are handled elsewhere. */
6136 if (fh->elf.root.type == bfd_link_hash_undefweak
6137 && fh->was_undefined
6138 && (fdh = defined_func_desc (fh)) != NULL
6139 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6140 && opd_entry_value (fdh->elf.root.u.def.section,
6141 fdh->elf.root.u.def.value,
6142 &fh->elf.root.u.def.section,
6143 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6144 {
6145 fh->elf.root.type = fdh->elf.root.type;
6146 fh->elf.forced_local = 1;
6147 fh->elf.def_regular = fdh->elf.def_regular;
6148 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6149 }
6150
6151 /* If this is a function code symbol, transfer dynamic linking
6152 information to the function descriptor symbol. */
6153 if (!fh->is_func)
6154 return TRUE;
6155
6156 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6157 if (ent->plt.refcount > 0)
6158 break;
6159 if (ent == NULL
6160 || fh->elf.root.root.string[0] != '.'
6161 || fh->elf.root.root.string[1] == '\0')
6162 return TRUE;
6163
6164 /* Find the corresponding function descriptor symbol. Create it
6165 as undefined if necessary. */
6166
6167 fdh = lookup_fdh (fh, htab);
6168 if (fdh == NULL
6169 && !info->executable
6170 && (fh->elf.root.type == bfd_link_hash_undefined
6171 || fh->elf.root.type == bfd_link_hash_undefweak))
6172 {
6173 fdh = make_fdh (info, fh);
6174 if (fdh == NULL)
6175 return FALSE;
6176 }
6177
6178 /* Fake function descriptors are made undefweak. If the function
6179 code symbol is strong undefined, make the fake sym the same.
6180 If the function code symbol is defined, then force the fake
6181 descriptor local; We can't support overriding of symbols in a
6182 shared library on a fake descriptor. */
6183
6184 if (fdh != NULL
6185 && fdh->fake
6186 && fdh->elf.root.type == bfd_link_hash_undefweak)
6187 {
6188 if (fh->elf.root.type == bfd_link_hash_undefined)
6189 {
6190 fdh->elf.root.type = bfd_link_hash_undefined;
6191 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6192 }
6193 else if (fh->elf.root.type == bfd_link_hash_defined
6194 || fh->elf.root.type == bfd_link_hash_defweak)
6195 {
6196 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6197 }
6198 }
6199
6200 if (fdh != NULL
6201 && !fdh->elf.forced_local
6202 && (!info->executable
6203 || fdh->elf.def_dynamic
6204 || fdh->elf.ref_dynamic
6205 || (fdh->elf.root.type == bfd_link_hash_undefweak
6206 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6207 {
6208 if (fdh->elf.dynindx == -1)
6209 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6210 return FALSE;
6211 fdh->elf.ref_regular |= fh->elf.ref_regular;
6212 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6213 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6214 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6215 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6216 {
6217 move_plt_plist (fh, fdh);
6218 fdh->elf.needs_plt = 1;
6219 }
6220 fdh->is_func_descriptor = 1;
6221 fdh->oh = fh;
6222 fh->oh = fdh;
6223 }
6224
6225 /* Now that the info is on the function descriptor, clear the
6226 function code sym info. Any function code syms for which we
6227 don't have a definition in a regular file, we force local.
6228 This prevents a shared library from exporting syms that have
6229 been imported from another library. Function code syms that
6230 are really in the library we must leave global to prevent the
6231 linker dragging in a definition from a static library. */
6232 force_local = (!fh->elf.def_regular
6233 || fdh == NULL
6234 || !fdh->elf.def_regular
6235 || fdh->elf.forced_local);
6236 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6237
6238 return TRUE;
6239 }
6240
6241 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6242 this hook to a) provide some gcc support functions, and b) transfer
6243 dynamic linking information gathered so far on function code symbol
6244 entries, to their corresponding function descriptor symbol entries. */
6245
6246 static bfd_boolean
6247 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6248 struct bfd_link_info *info)
6249 {
6250 struct ppc_link_hash_table *htab;
6251 unsigned int i;
6252 const struct sfpr_def_parms funcs[] =
6253 {
6254 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6255 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6256 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6257 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6258 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6259 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6260 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6261 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6262 { "._savef", 14, 31, savefpr, savefpr1_tail },
6263 { "._restf", 14, 31, restfpr, restfpr1_tail },
6264 { "_savevr_", 20, 31, savevr, savevr_tail },
6265 { "_restvr_", 20, 31, restvr, restvr_tail }
6266 };
6267
6268 htab = ppc_hash_table (info);
6269 if (htab->sfpr == NULL)
6270 /* We don't have any relocs. */
6271 return TRUE;
6272
6273 /* Provide any missing _save* and _rest* functions. */
6274 htab->sfpr->size = 0;
6275 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6276 if (!sfpr_define (info, &funcs[i]))
6277 return FALSE;
6278
6279 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6280
6281 if (htab->sfpr->size == 0)
6282 htab->sfpr->flags |= SEC_EXCLUDE;
6283
6284 return TRUE;
6285 }
6286
6287 /* Adjust a symbol defined by a dynamic object and referenced by a
6288 regular object. The current definition is in some section of the
6289 dynamic object, but we're not including those sections. We have to
6290 change the definition to something the rest of the link can
6291 understand. */
6292
6293 static bfd_boolean
6294 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6295 struct elf_link_hash_entry *h)
6296 {
6297 struct ppc_link_hash_table *htab;
6298 asection *s;
6299
6300 htab = ppc_hash_table (info);
6301
6302 /* Deal with function syms. */
6303 if (h->type == STT_FUNC
6304 || h->type == STT_GNU_IFUNC
6305 || h->needs_plt)
6306 {
6307 /* Clear procedure linkage table information for any symbol that
6308 won't need a .plt entry. */
6309 struct plt_entry *ent;
6310 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6311 if (ent->plt.refcount > 0)
6312 break;
6313 if (ent == NULL
6314 || (h->type != STT_GNU_IFUNC
6315 && (SYMBOL_CALLS_LOCAL (info, h)
6316 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6317 && h->root.type == bfd_link_hash_undefweak))))
6318 {
6319 h->plt.plist = NULL;
6320 h->needs_plt = 0;
6321 }
6322 }
6323 else
6324 h->plt.plist = NULL;
6325
6326 /* If this is a weak symbol, and there is a real definition, the
6327 processor independent code will have arranged for us to see the
6328 real definition first, and we can just use the same value. */
6329 if (h->u.weakdef != NULL)
6330 {
6331 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6332 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6333 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6334 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6335 if (ELIMINATE_COPY_RELOCS)
6336 h->non_got_ref = h->u.weakdef->non_got_ref;
6337 return TRUE;
6338 }
6339
6340 /* If we are creating a shared library, we must presume that the
6341 only references to the symbol are via the global offset table.
6342 For such cases we need not do anything here; the relocations will
6343 be handled correctly by relocate_section. */
6344 if (info->shared)
6345 return TRUE;
6346
6347 /* If there are no references to this symbol that do not use the
6348 GOT, we don't need to generate a copy reloc. */
6349 if (!h->non_got_ref)
6350 return TRUE;
6351
6352 /* Don't generate a copy reloc for symbols defined in the executable. */
6353 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6354 return TRUE;
6355
6356 if (ELIMINATE_COPY_RELOCS)
6357 {
6358 struct ppc_link_hash_entry * eh;
6359 struct ppc_dyn_relocs *p;
6360
6361 eh = (struct ppc_link_hash_entry *) h;
6362 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6363 {
6364 s = p->sec->output_section;
6365 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6366 break;
6367 }
6368
6369 /* If we didn't find any dynamic relocs in read-only sections, then
6370 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6371 if (p == NULL)
6372 {
6373 h->non_got_ref = 0;
6374 return TRUE;
6375 }
6376 }
6377
6378 if (h->plt.plist != NULL)
6379 {
6380 /* We should never get here, but unfortunately there are versions
6381 of gcc out there that improperly (for this ABI) put initialized
6382 function pointers, vtable refs and suchlike in read-only
6383 sections. Allow them to proceed, but warn that this might
6384 break at runtime. */
6385 (*_bfd_error_handler)
6386 (_("copy reloc against `%s' requires lazy plt linking; "
6387 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6388 h->root.root.string);
6389 }
6390
6391 /* This is a reference to a symbol defined by a dynamic object which
6392 is not a function. */
6393
6394 if (h->size == 0)
6395 {
6396 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6397 h->root.root.string);
6398 return TRUE;
6399 }
6400
6401 /* We must allocate the symbol in our .dynbss section, which will
6402 become part of the .bss section of the executable. There will be
6403 an entry for this symbol in the .dynsym section. The dynamic
6404 object will contain position independent code, so all references
6405 from the dynamic object to this symbol will go through the global
6406 offset table. The dynamic linker will use the .dynsym entry to
6407 determine the address it must put in the global offset table, so
6408 both the dynamic object and the regular object will refer to the
6409 same memory location for the variable. */
6410
6411 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6412 to copy the initial value out of the dynamic object and into the
6413 runtime process image. We need to remember the offset into the
6414 .rela.bss section we are going to use. */
6415 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6416 {
6417 htab->relbss->size += sizeof (Elf64_External_Rela);
6418 h->needs_copy = 1;
6419 }
6420
6421 s = htab->dynbss;
6422
6423 return _bfd_elf_adjust_dynamic_copy (h, s);
6424 }
6425
6426 /* If given a function descriptor symbol, hide both the function code
6427 sym and the descriptor. */
6428 static void
6429 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6430 struct elf_link_hash_entry *h,
6431 bfd_boolean force_local)
6432 {
6433 struct ppc_link_hash_entry *eh;
6434 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6435
6436 eh = (struct ppc_link_hash_entry *) h;
6437 if (eh->is_func_descriptor)
6438 {
6439 struct ppc_link_hash_entry *fh = eh->oh;
6440
6441 if (fh == NULL)
6442 {
6443 const char *p, *q;
6444 struct ppc_link_hash_table *htab;
6445 char save;
6446
6447 /* We aren't supposed to use alloca in BFD because on
6448 systems which do not have alloca the version in libiberty
6449 calls xmalloc, which might cause the program to crash
6450 when it runs out of memory. This function doesn't have a
6451 return status, so there's no way to gracefully return an
6452 error. So cheat. We know that string[-1] can be safely
6453 accessed; It's either a string in an ELF string table,
6454 or allocated in an objalloc structure. */
6455
6456 p = eh->elf.root.root.string - 1;
6457 save = *p;
6458 *(char *) p = '.';
6459 htab = ppc_hash_table (info);
6460 fh = (struct ppc_link_hash_entry *)
6461 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6462 *(char *) p = save;
6463
6464 /* Unfortunately, if it so happens that the string we were
6465 looking for was allocated immediately before this string,
6466 then we overwrote the string terminator. That's the only
6467 reason the lookup should fail. */
6468 if (fh == NULL)
6469 {
6470 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6471 while (q >= eh->elf.root.root.string && *q == *p)
6472 --q, --p;
6473 if (q < eh->elf.root.root.string && *p == '.')
6474 fh = (struct ppc_link_hash_entry *)
6475 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6476 }
6477 if (fh != NULL)
6478 {
6479 eh->oh = fh;
6480 fh->oh = eh;
6481 }
6482 }
6483 if (fh != NULL)
6484 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6485 }
6486 }
6487
6488 static bfd_boolean
6489 get_sym_h (struct elf_link_hash_entry **hp,
6490 Elf_Internal_Sym **symp,
6491 asection **symsecp,
6492 char **tls_maskp,
6493 Elf_Internal_Sym **locsymsp,
6494 unsigned long r_symndx,
6495 bfd *ibfd)
6496 {
6497 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6498
6499 if (r_symndx >= symtab_hdr->sh_info)
6500 {
6501 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6502 struct elf_link_hash_entry *h;
6503
6504 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6505 h = elf_follow_link (h);
6506
6507 if (hp != NULL)
6508 *hp = h;
6509
6510 if (symp != NULL)
6511 *symp = NULL;
6512
6513 if (symsecp != NULL)
6514 {
6515 asection *symsec = NULL;
6516 if (h->root.type == bfd_link_hash_defined
6517 || h->root.type == bfd_link_hash_defweak)
6518 symsec = h->root.u.def.section;
6519 *symsecp = symsec;
6520 }
6521
6522 if (tls_maskp != NULL)
6523 {
6524 struct ppc_link_hash_entry *eh;
6525
6526 eh = (struct ppc_link_hash_entry *) h;
6527 *tls_maskp = &eh->tls_mask;
6528 }
6529 }
6530 else
6531 {
6532 Elf_Internal_Sym *sym;
6533 Elf_Internal_Sym *locsyms = *locsymsp;
6534
6535 if (locsyms == NULL)
6536 {
6537 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6538 if (locsyms == NULL)
6539 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6540 symtab_hdr->sh_info,
6541 0, NULL, NULL, NULL);
6542 if (locsyms == NULL)
6543 return FALSE;
6544 *locsymsp = locsyms;
6545 }
6546 sym = locsyms + r_symndx;
6547
6548 if (hp != NULL)
6549 *hp = NULL;
6550
6551 if (symp != NULL)
6552 *symp = sym;
6553
6554 if (symsecp != NULL)
6555 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6556
6557 if (tls_maskp != NULL)
6558 {
6559 struct got_entry **lgot_ents;
6560 char *tls_mask;
6561
6562 tls_mask = NULL;
6563 lgot_ents = elf_local_got_ents (ibfd);
6564 if (lgot_ents != NULL)
6565 {
6566 struct plt_entry **local_plt = (struct plt_entry **)
6567 (lgot_ents + symtab_hdr->sh_info);
6568 char *lgot_masks = (char *)
6569 (local_plt + symtab_hdr->sh_info);
6570 tls_mask = &lgot_masks[r_symndx];
6571 }
6572 *tls_maskp = tls_mask;
6573 }
6574 }
6575 return TRUE;
6576 }
6577
6578 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6579 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6580 type suitable for optimization, and 1 otherwise. */
6581
6582 static int
6583 get_tls_mask (char **tls_maskp,
6584 unsigned long *toc_symndx,
6585 bfd_vma *toc_addend,
6586 Elf_Internal_Sym **locsymsp,
6587 const Elf_Internal_Rela *rel,
6588 bfd *ibfd)
6589 {
6590 unsigned long r_symndx;
6591 int next_r;
6592 struct elf_link_hash_entry *h;
6593 Elf_Internal_Sym *sym;
6594 asection *sec;
6595 bfd_vma off;
6596
6597 r_symndx = ELF64_R_SYM (rel->r_info);
6598 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6599 return 0;
6600
6601 if ((*tls_maskp != NULL && **tls_maskp != 0)
6602 || sec == NULL
6603 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6604 return 1;
6605
6606 /* Look inside a TOC section too. */
6607 if (h != NULL)
6608 {
6609 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6610 off = h->root.u.def.value;
6611 }
6612 else
6613 off = sym->st_value;
6614 off += rel->r_addend;
6615 BFD_ASSERT (off % 8 == 0);
6616 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6617 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6618 if (toc_symndx != NULL)
6619 *toc_symndx = r_symndx;
6620 if (toc_addend != NULL)
6621 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6622 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6623 return 0;
6624 if ((h == NULL
6625 || ((h->root.type == bfd_link_hash_defined
6626 || h->root.type == bfd_link_hash_defweak)
6627 && !h->def_dynamic))
6628 && (next_r == -1 || next_r == -2))
6629 return 1 - next_r;
6630 return 1;
6631 }
6632
6633 /* Adjust all global syms defined in opd sections. In gcc generated
6634 code for the old ABI, these will already have been done. */
6635
6636 static bfd_boolean
6637 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6638 {
6639 struct ppc_link_hash_entry *eh;
6640 asection *sym_sec;
6641 struct _opd_sec_data *opd;
6642
6643 if (h->root.type == bfd_link_hash_indirect)
6644 return TRUE;
6645
6646 if (h->root.type == bfd_link_hash_warning)
6647 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6648
6649 if (h->root.type != bfd_link_hash_defined
6650 && h->root.type != bfd_link_hash_defweak)
6651 return TRUE;
6652
6653 eh = (struct ppc_link_hash_entry *) h;
6654 if (eh->adjust_done)
6655 return TRUE;
6656
6657 sym_sec = eh->elf.root.u.def.section;
6658 opd = get_opd_info (sym_sec);
6659 if (opd != NULL && opd->adjust != NULL)
6660 {
6661 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6662 if (adjust == -1)
6663 {
6664 /* This entry has been deleted. */
6665 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6666 if (dsec == NULL)
6667 {
6668 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6669 if (elf_discarded_section (dsec))
6670 {
6671 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6672 break;
6673 }
6674 }
6675 eh->elf.root.u.def.value = 0;
6676 eh->elf.root.u.def.section = dsec;
6677 }
6678 else
6679 eh->elf.root.u.def.value += adjust;
6680 eh->adjust_done = 1;
6681 }
6682 return TRUE;
6683 }
6684
6685 /* Handles decrementing dynamic reloc counts for the reloc specified by
6686 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6687 have already been determined. */
6688
6689 static bfd_boolean
6690 dec_dynrel_count (bfd_vma r_info,
6691 asection *sec,
6692 struct bfd_link_info *info,
6693 Elf_Internal_Sym **local_syms,
6694 struct elf_link_hash_entry *h,
6695 asection *sym_sec)
6696 {
6697 enum elf_ppc64_reloc_type r_type;
6698 struct ppc_dyn_relocs *p;
6699 struct ppc_dyn_relocs **pp;
6700
6701 /* Can this reloc be dynamic? This switch, and later tests here
6702 should be kept in sync with the code in check_relocs. */
6703 r_type = ELF64_R_TYPE (r_info);
6704 switch (r_type)
6705 {
6706 default:
6707 return TRUE;
6708
6709 case R_PPC64_TPREL16:
6710 case R_PPC64_TPREL16_LO:
6711 case R_PPC64_TPREL16_HI:
6712 case R_PPC64_TPREL16_HA:
6713 case R_PPC64_TPREL16_DS:
6714 case R_PPC64_TPREL16_LO_DS:
6715 case R_PPC64_TPREL16_HIGHER:
6716 case R_PPC64_TPREL16_HIGHERA:
6717 case R_PPC64_TPREL16_HIGHEST:
6718 case R_PPC64_TPREL16_HIGHESTA:
6719 if (!info->shared)
6720 return TRUE;
6721
6722 case R_PPC64_TPREL64:
6723 case R_PPC64_DTPMOD64:
6724 case R_PPC64_DTPREL64:
6725 case R_PPC64_ADDR64:
6726 case R_PPC64_REL30:
6727 case R_PPC64_REL32:
6728 case R_PPC64_REL64:
6729 case R_PPC64_ADDR14:
6730 case R_PPC64_ADDR14_BRNTAKEN:
6731 case R_PPC64_ADDR14_BRTAKEN:
6732 case R_PPC64_ADDR16:
6733 case R_PPC64_ADDR16_DS:
6734 case R_PPC64_ADDR16_HA:
6735 case R_PPC64_ADDR16_HI:
6736 case R_PPC64_ADDR16_HIGHER:
6737 case R_PPC64_ADDR16_HIGHERA:
6738 case R_PPC64_ADDR16_HIGHEST:
6739 case R_PPC64_ADDR16_HIGHESTA:
6740 case R_PPC64_ADDR16_LO:
6741 case R_PPC64_ADDR16_LO_DS:
6742 case R_PPC64_ADDR24:
6743 case R_PPC64_ADDR32:
6744 case R_PPC64_UADDR16:
6745 case R_PPC64_UADDR32:
6746 case R_PPC64_UADDR64:
6747 case R_PPC64_TOC:
6748 break;
6749 }
6750
6751 if (local_syms != NULL)
6752 {
6753 unsigned long r_symndx;
6754 Elf_Internal_Sym *sym;
6755 bfd *ibfd = sec->owner;
6756
6757 r_symndx = ELF64_R_SYM (r_info);
6758 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6759 return FALSE;
6760 }
6761
6762 if ((info->shared
6763 && (must_be_dyn_reloc (info, r_type)
6764 || (h != NULL
6765 && (!info->symbolic
6766 || h->root.type == bfd_link_hash_defweak
6767 || !h->def_regular))))
6768 || (ELIMINATE_COPY_RELOCS
6769 && !info->shared
6770 && h != NULL
6771 && (h->root.type == bfd_link_hash_defweak
6772 || !h->def_regular)))
6773 ;
6774 else
6775 return TRUE;
6776
6777 if (h != NULL)
6778 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6779 else
6780 {
6781 if (sym_sec != NULL)
6782 {
6783 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6784 pp = (struct ppc_dyn_relocs **) vpp;
6785 }
6786 else
6787 {
6788 void *vpp = &elf_section_data (sec)->local_dynrel;
6789 pp = (struct ppc_dyn_relocs **) vpp;
6790 }
6791
6792 /* elf_gc_sweep may have already removed all dyn relocs associated
6793 with local syms for a given section. Don't report a dynreloc
6794 miscount. */
6795 if (*pp == NULL)
6796 return TRUE;
6797 }
6798
6799 while ((p = *pp) != NULL)
6800 {
6801 if (p->sec == sec)
6802 {
6803 if (!must_be_dyn_reloc (info, r_type))
6804 p->pc_count -= 1;
6805 p->count -= 1;
6806 if (p->count == 0)
6807 *pp = p->next;
6808 return TRUE;
6809 }
6810 pp = &p->next;
6811 }
6812
6813 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6814 sec->owner, sec);
6815 bfd_set_error (bfd_error_bad_value);
6816 return FALSE;
6817 }
6818
6819 /* Remove unused Official Procedure Descriptor entries. Currently we
6820 only remove those associated with functions in discarded link-once
6821 sections, or weakly defined functions that have been overridden. It
6822 would be possible to remove many more entries for statically linked
6823 applications. */
6824
6825 bfd_boolean
6826 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6827 bfd_boolean non_overlapping)
6828 {
6829 bfd *ibfd;
6830 bfd_boolean some_edited = FALSE;
6831 asection *need_pad = NULL;
6832
6833 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6834 {
6835 asection *sec;
6836 Elf_Internal_Rela *relstart, *rel, *relend;
6837 Elf_Internal_Shdr *symtab_hdr;
6838 Elf_Internal_Sym *local_syms;
6839 struct elf_link_hash_entry **sym_hashes;
6840 bfd_vma offset;
6841 struct _opd_sec_data *opd;
6842 bfd_boolean need_edit, add_aux_fields;
6843 bfd_size_type cnt_16b = 0;
6844
6845 sec = bfd_get_section_by_name (ibfd, ".opd");
6846 if (sec == NULL || sec->size == 0)
6847 continue;
6848
6849 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6850 continue;
6851
6852 if (sec->output_section == bfd_abs_section_ptr)
6853 continue;
6854
6855 /* Look through the section relocs. */
6856 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6857 continue;
6858
6859 local_syms = NULL;
6860 symtab_hdr = &elf_symtab_hdr (ibfd);
6861 sym_hashes = elf_sym_hashes (ibfd);
6862
6863 /* Read the relocations. */
6864 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6865 info->keep_memory);
6866 if (relstart == NULL)
6867 return FALSE;
6868
6869 /* First run through the relocs to check they are sane, and to
6870 determine whether we need to edit this opd section. */
6871 need_edit = FALSE;
6872 need_pad = sec;
6873 offset = 0;
6874 relend = relstart + sec->reloc_count;
6875 for (rel = relstart; rel < relend; )
6876 {
6877 enum elf_ppc64_reloc_type r_type;
6878 unsigned long r_symndx;
6879 asection *sym_sec;
6880 struct elf_link_hash_entry *h;
6881 Elf_Internal_Sym *sym;
6882
6883 /* .opd contains a regular array of 16 or 24 byte entries. We're
6884 only interested in the reloc pointing to a function entry
6885 point. */
6886 if (rel->r_offset != offset
6887 || rel + 1 >= relend
6888 || (rel + 1)->r_offset != offset + 8)
6889 {
6890 /* If someone messes with .opd alignment then after a
6891 "ld -r" we might have padding in the middle of .opd.
6892 Also, there's nothing to prevent someone putting
6893 something silly in .opd with the assembler. No .opd
6894 optimization for them! */
6895 broken_opd:
6896 (*_bfd_error_handler)
6897 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6898 need_edit = FALSE;
6899 break;
6900 }
6901
6902 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6903 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6904 {
6905 (*_bfd_error_handler)
6906 (_("%B: unexpected reloc type %u in .opd section"),
6907 ibfd, r_type);
6908 need_edit = FALSE;
6909 break;
6910 }
6911
6912 r_symndx = ELF64_R_SYM (rel->r_info);
6913 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6914 r_symndx, ibfd))
6915 goto error_ret;
6916
6917 if (sym_sec == NULL || sym_sec->owner == NULL)
6918 {
6919 const char *sym_name;
6920 if (h != NULL)
6921 sym_name = h->root.root.string;
6922 else
6923 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6924 sym_sec);
6925
6926 (*_bfd_error_handler)
6927 (_("%B: undefined sym `%s' in .opd section"),
6928 ibfd, sym_name);
6929 need_edit = FALSE;
6930 break;
6931 }
6932
6933 /* opd entries are always for functions defined in the
6934 current input bfd. If the symbol isn't defined in the
6935 input bfd, then we won't be using the function in this
6936 bfd; It must be defined in a linkonce section in another
6937 bfd, or is weak. It's also possible that we are
6938 discarding the function due to a linker script /DISCARD/,
6939 which we test for via the output_section. */
6940 if (sym_sec->owner != ibfd
6941 || sym_sec->output_section == bfd_abs_section_ptr)
6942 need_edit = TRUE;
6943
6944 rel += 2;
6945 if (rel == relend
6946 || (rel + 1 == relend && rel->r_offset == offset + 16))
6947 {
6948 if (sec->size == offset + 24)
6949 {
6950 need_pad = NULL;
6951 break;
6952 }
6953 if (rel == relend && sec->size == offset + 16)
6954 {
6955 cnt_16b++;
6956 break;
6957 }
6958 goto broken_opd;
6959 }
6960
6961 if (rel->r_offset == offset + 24)
6962 offset += 24;
6963 else if (rel->r_offset != offset + 16)
6964 goto broken_opd;
6965 else if (rel + 1 < relend
6966 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6967 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6968 {
6969 offset += 16;
6970 cnt_16b++;
6971 }
6972 else if (rel + 2 < relend
6973 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6974 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6975 {
6976 offset += 24;
6977 rel += 1;
6978 }
6979 else
6980 goto broken_opd;
6981 }
6982
6983 add_aux_fields = non_overlapping && cnt_16b > 0;
6984
6985 if (need_edit || add_aux_fields)
6986 {
6987 Elf_Internal_Rela *write_rel;
6988 bfd_byte *rptr, *wptr;
6989 bfd_byte *new_contents;
6990 bfd_boolean skip;
6991 long opd_ent_size;
6992 bfd_size_type amt;
6993
6994 new_contents = NULL;
6995 amt = sec->size * sizeof (long) / 8;
6996 opd = &ppc64_elf_section_data (sec)->u.opd;
6997 opd->adjust = bfd_zalloc (obfd, amt);
6998 if (opd->adjust == NULL)
6999 return FALSE;
7000 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7001
7002 /* This seems a waste of time as input .opd sections are all
7003 zeros as generated by gcc, but I suppose there's no reason
7004 this will always be so. We might start putting something in
7005 the third word of .opd entries. */
7006 if ((sec->flags & SEC_IN_MEMORY) == 0)
7007 {
7008 bfd_byte *loc;
7009 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7010 {
7011 if (loc != NULL)
7012 free (loc);
7013 error_ret:
7014 if (local_syms != NULL
7015 && symtab_hdr->contents != (unsigned char *) local_syms)
7016 free (local_syms);
7017 if (elf_section_data (sec)->relocs != relstart)
7018 free (relstart);
7019 return FALSE;
7020 }
7021 sec->contents = loc;
7022 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7023 }
7024
7025 elf_section_data (sec)->relocs = relstart;
7026
7027 new_contents = sec->contents;
7028 if (add_aux_fields)
7029 {
7030 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7031 if (new_contents == NULL)
7032 return FALSE;
7033 need_pad = FALSE;
7034 }
7035 wptr = new_contents;
7036 rptr = sec->contents;
7037
7038 write_rel = relstart;
7039 skip = FALSE;
7040 offset = 0;
7041 opd_ent_size = 0;
7042 for (rel = relstart; rel < relend; rel++)
7043 {
7044 unsigned long r_symndx;
7045 asection *sym_sec;
7046 struct elf_link_hash_entry *h;
7047 Elf_Internal_Sym *sym;
7048
7049 r_symndx = ELF64_R_SYM (rel->r_info);
7050 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7051 r_symndx, ibfd))
7052 goto error_ret;
7053
7054 if (rel->r_offset == offset)
7055 {
7056 struct ppc_link_hash_entry *fdh = NULL;
7057
7058 /* See if the .opd entry is full 24 byte or
7059 16 byte (with fd_aux entry overlapped with next
7060 fd_func). */
7061 opd_ent_size = 24;
7062 if ((rel + 2 == relend && sec->size == offset + 16)
7063 || (rel + 3 < relend
7064 && rel[2].r_offset == offset + 16
7065 && rel[3].r_offset == offset + 24
7066 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7067 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7068 opd_ent_size = 16;
7069
7070 if (h != NULL
7071 && h->root.root.string[0] == '.')
7072 {
7073 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7074 ppc_hash_table (info));
7075 if (fdh != NULL
7076 && fdh->elf.root.type != bfd_link_hash_defined
7077 && fdh->elf.root.type != bfd_link_hash_defweak)
7078 fdh = NULL;
7079 }
7080
7081 skip = (sym_sec->owner != ibfd
7082 || sym_sec->output_section == bfd_abs_section_ptr);
7083 if (skip)
7084 {
7085 if (fdh != NULL && sym_sec->owner == ibfd)
7086 {
7087 /* Arrange for the function descriptor sym
7088 to be dropped. */
7089 fdh->elf.root.u.def.value = 0;
7090 fdh->elf.root.u.def.section = sym_sec;
7091 }
7092 opd->adjust[rel->r_offset / 8] = -1;
7093 }
7094 else
7095 {
7096 /* We'll be keeping this opd entry. */
7097
7098 if (fdh != NULL)
7099 {
7100 /* Redefine the function descriptor symbol to
7101 this location in the opd section. It is
7102 necessary to update the value here rather
7103 than using an array of adjustments as we do
7104 for local symbols, because various places
7105 in the generic ELF code use the value
7106 stored in u.def.value. */
7107 fdh->elf.root.u.def.value = wptr - new_contents;
7108 fdh->adjust_done = 1;
7109 }
7110
7111 /* Local syms are a bit tricky. We could
7112 tweak them as they can be cached, but
7113 we'd need to look through the local syms
7114 for the function descriptor sym which we
7115 don't have at the moment. So keep an
7116 array of adjustments. */
7117 opd->adjust[rel->r_offset / 8]
7118 = (wptr - new_contents) - (rptr - sec->contents);
7119
7120 if (wptr != rptr)
7121 memcpy (wptr, rptr, opd_ent_size);
7122 wptr += opd_ent_size;
7123 if (add_aux_fields && opd_ent_size == 16)
7124 {
7125 memset (wptr, '\0', 8);
7126 wptr += 8;
7127 }
7128 }
7129 rptr += opd_ent_size;
7130 offset += opd_ent_size;
7131 }
7132
7133 if (skip)
7134 {
7135 if (!NO_OPD_RELOCS
7136 && !info->relocatable
7137 && !dec_dynrel_count (rel->r_info, sec, info,
7138 NULL, h, sym_sec))
7139 goto error_ret;
7140 }
7141 else
7142 {
7143 /* We need to adjust any reloc offsets to point to the
7144 new opd entries. While we're at it, we may as well
7145 remove redundant relocs. */
7146 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7147 if (write_rel != rel)
7148 memcpy (write_rel, rel, sizeof (*rel));
7149 ++write_rel;
7150 }
7151 }
7152
7153 sec->size = wptr - new_contents;
7154 sec->reloc_count = write_rel - relstart;
7155 if (add_aux_fields)
7156 {
7157 free (sec->contents);
7158 sec->contents = new_contents;
7159 }
7160
7161 /* Fudge the header size too, as this is used later in
7162 elf_bfd_final_link if we are emitting relocs. */
7163 elf_section_data (sec)->rel_hdr.sh_size
7164 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
7165 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
7166 some_edited = TRUE;
7167 }
7168 else if (elf_section_data (sec)->relocs != relstart)
7169 free (relstart);
7170
7171 if (local_syms != NULL
7172 && symtab_hdr->contents != (unsigned char *) local_syms)
7173 {
7174 if (!info->keep_memory)
7175 free (local_syms);
7176 else
7177 symtab_hdr->contents = (unsigned char *) local_syms;
7178 }
7179 }
7180
7181 if (some_edited)
7182 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7183
7184 /* If we are doing a final link and the last .opd entry is just 16 byte
7185 long, add a 8 byte padding after it. */
7186 if (need_pad != NULL && !info->relocatable)
7187 {
7188 bfd_byte *p;
7189
7190 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7191 {
7192 BFD_ASSERT (need_pad->size > 0);
7193
7194 p = bfd_malloc (need_pad->size + 8);
7195 if (p == NULL)
7196 return FALSE;
7197
7198 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7199 p, 0, need_pad->size))
7200 return FALSE;
7201
7202 need_pad->contents = p;
7203 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7204 }
7205 else
7206 {
7207 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7208 if (p == NULL)
7209 return FALSE;
7210
7211 need_pad->contents = p;
7212 }
7213
7214 memset (need_pad->contents + need_pad->size, 0, 8);
7215 need_pad->size += 8;
7216 }
7217
7218 return TRUE;
7219 }
7220
7221 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7222
7223 asection *
7224 ppc64_elf_tls_setup (bfd *obfd,
7225 struct bfd_link_info *info,
7226 int no_tls_get_addr_opt)
7227 {
7228 struct ppc_link_hash_table *htab;
7229
7230 htab = ppc_hash_table (info);
7231 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7232 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7233 FALSE, FALSE, TRUE));
7234 /* Move dynamic linking info to the function descriptor sym. */
7235 if (htab->tls_get_addr != NULL)
7236 func_desc_adjust (&htab->tls_get_addr->elf, info);
7237 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7238 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7239 FALSE, FALSE, TRUE));
7240 if (!no_tls_get_addr_opt)
7241 {
7242 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7243
7244 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7245 FALSE, FALSE, TRUE);
7246 if (opt != NULL)
7247 func_desc_adjust (opt, info);
7248 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7249 FALSE, FALSE, TRUE);
7250 if (opt_fd != NULL
7251 && (opt_fd->root.type == bfd_link_hash_defined
7252 || opt_fd->root.type == bfd_link_hash_defweak))
7253 {
7254 /* If glibc supports an optimized __tls_get_addr call stub,
7255 signalled by the presence of __tls_get_addr_opt, and we'll
7256 be calling __tls_get_addr via a plt call stub, then
7257 make __tls_get_addr point to __tls_get_addr_opt. */
7258 tga_fd = &htab->tls_get_addr_fd->elf;
7259 if (htab->elf.dynamic_sections_created
7260 && tga_fd != NULL
7261 && (tga_fd->type == STT_FUNC
7262 || tga_fd->needs_plt)
7263 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7264 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7265 && tga_fd->root.type == bfd_link_hash_undefweak)))
7266 {
7267 struct plt_entry *ent;
7268
7269 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7270 if (ent->plt.refcount > 0)
7271 break;
7272 if (ent != NULL)
7273 {
7274 tga_fd->root.type = bfd_link_hash_indirect;
7275 tga_fd->root.u.i.link = &opt_fd->root;
7276 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7277 if (opt_fd->dynindx != -1)
7278 {
7279 /* Use __tls_get_addr_opt in dynamic relocations. */
7280 opt_fd->dynindx = -1;
7281 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7282 opt_fd->dynstr_index);
7283 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7284 return FALSE;
7285 }
7286 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7287 tga = &htab->tls_get_addr->elf;
7288 if (opt != NULL && tga != NULL)
7289 {
7290 tga->root.type = bfd_link_hash_indirect;
7291 tga->root.u.i.link = &opt->root;
7292 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7293 _bfd_elf_link_hash_hide_symbol (info, opt,
7294 tga->forced_local);
7295 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7296 }
7297 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7298 htab->tls_get_addr_fd->is_func_descriptor = 1;
7299 if (htab->tls_get_addr != NULL)
7300 {
7301 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7302 htab->tls_get_addr->is_func = 1;
7303 }
7304 }
7305 }
7306 }
7307 else
7308 no_tls_get_addr_opt = TRUE;
7309 }
7310 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7311 return _bfd_elf_tls_setup (obfd, info);
7312 }
7313
7314 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7315 HASH1 or HASH2. */
7316
7317 static bfd_boolean
7318 branch_reloc_hash_match (const bfd *ibfd,
7319 const Elf_Internal_Rela *rel,
7320 const struct ppc_link_hash_entry *hash1,
7321 const struct ppc_link_hash_entry *hash2)
7322 {
7323 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7324 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7325 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7326
7327 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7328 {
7329 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7330 struct elf_link_hash_entry *h;
7331
7332 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7333 h = elf_follow_link (h);
7334 if (h == &hash1->elf || h == &hash2->elf)
7335 return TRUE;
7336 }
7337 return FALSE;
7338 }
7339
7340 /* Run through all the TLS relocs looking for optimization
7341 opportunities. The linker has been hacked (see ppc64elf.em) to do
7342 a preliminary section layout so that we know the TLS segment
7343 offsets. We can't optimize earlier because some optimizations need
7344 to know the tp offset, and we need to optimize before allocating
7345 dynamic relocations. */
7346
7347 bfd_boolean
7348 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7349 {
7350 bfd *ibfd;
7351 asection *sec;
7352 struct ppc_link_hash_table *htab;
7353 int pass;
7354
7355 if (info->relocatable || !info->executable)
7356 return TRUE;
7357
7358 htab = ppc_hash_table (info);
7359 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7360 {
7361 Elf_Internal_Sym *locsyms = NULL;
7362 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7363 unsigned char *toc_ref = NULL;
7364
7365 /* Look at all the sections for this file. Make two passes over
7366 the relocs. On the first pass, mark toc entries involved
7367 with tls relocs, and check that tls relocs involved in
7368 setting up a tls_get_addr call are indeed followed by such a
7369 call. If they are not, exclude them from the optimizations
7370 done on the second pass. */
7371 for (pass = 0; pass < 2; ++pass)
7372 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7373 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7374 {
7375 Elf_Internal_Rela *relstart, *rel, *relend;
7376
7377 /* Read the relocations. */
7378 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7379 info->keep_memory);
7380 if (relstart == NULL)
7381 return FALSE;
7382
7383 relend = relstart + sec->reloc_count;
7384 for (rel = relstart; rel < relend; rel++)
7385 {
7386 enum elf_ppc64_reloc_type r_type;
7387 unsigned long r_symndx;
7388 struct elf_link_hash_entry *h;
7389 Elf_Internal_Sym *sym;
7390 asection *sym_sec;
7391 char *tls_mask;
7392 char tls_set, tls_clear, tls_type = 0;
7393 bfd_vma value;
7394 bfd_boolean ok_tprel, is_local;
7395 long toc_ref_index = 0;
7396 int expecting_tls_get_addr = 0;
7397
7398 r_symndx = ELF64_R_SYM (rel->r_info);
7399 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7400 r_symndx, ibfd))
7401 {
7402 err_free_rel:
7403 if (elf_section_data (sec)->relocs != relstart)
7404 free (relstart);
7405 if (toc_ref != NULL)
7406 free (toc_ref);
7407 if (locsyms != NULL
7408 && (elf_symtab_hdr (ibfd).contents
7409 != (unsigned char *) locsyms))
7410 free (locsyms);
7411 return FALSE;
7412 }
7413
7414 if (h != NULL)
7415 {
7416 if (h->root.type != bfd_link_hash_defined
7417 && h->root.type != bfd_link_hash_defweak)
7418 continue;
7419 value = h->root.u.def.value;
7420 }
7421 else
7422 /* Symbols referenced by TLS relocs must be of type
7423 STT_TLS. So no need for .opd local sym adjust. */
7424 value = sym->st_value;
7425
7426 ok_tprel = FALSE;
7427 is_local = FALSE;
7428 if (h == NULL
7429 || !h->def_dynamic)
7430 {
7431 is_local = TRUE;
7432 value += sym_sec->output_offset;
7433 value += sym_sec->output_section->vma;
7434 value -= htab->elf.tls_sec->vma;
7435 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7436 < (bfd_vma) 1 << 32);
7437 }
7438
7439 r_type = ELF64_R_TYPE (rel->r_info);
7440 switch (r_type)
7441 {
7442 case R_PPC64_GOT_TLSLD16:
7443 case R_PPC64_GOT_TLSLD16_LO:
7444 expecting_tls_get_addr = 1;
7445 /* Fall thru */
7446
7447 case R_PPC64_GOT_TLSLD16_HI:
7448 case R_PPC64_GOT_TLSLD16_HA:
7449 /* These relocs should never be against a symbol
7450 defined in a shared lib. Leave them alone if
7451 that turns out to be the case. */
7452 if (!is_local)
7453 continue;
7454
7455 /* LD -> LE */
7456 tls_set = 0;
7457 tls_clear = TLS_LD;
7458 tls_type = TLS_TLS | TLS_LD;
7459 break;
7460
7461 case R_PPC64_GOT_TLSGD16:
7462 case R_PPC64_GOT_TLSGD16_LO:
7463 expecting_tls_get_addr = 1;
7464 /* Fall thru */
7465
7466 case R_PPC64_GOT_TLSGD16_HI:
7467 case R_PPC64_GOT_TLSGD16_HA:
7468 if (ok_tprel)
7469 /* GD -> LE */
7470 tls_set = 0;
7471 else
7472 /* GD -> IE */
7473 tls_set = TLS_TLS | TLS_TPRELGD;
7474 tls_clear = TLS_GD;
7475 tls_type = TLS_TLS | TLS_GD;
7476 break;
7477
7478 case R_PPC64_GOT_TPREL16_DS:
7479 case R_PPC64_GOT_TPREL16_LO_DS:
7480 case R_PPC64_GOT_TPREL16_HI:
7481 case R_PPC64_GOT_TPREL16_HA:
7482 if (ok_tprel)
7483 {
7484 /* IE -> LE */
7485 tls_set = 0;
7486 tls_clear = TLS_TPREL;
7487 tls_type = TLS_TLS | TLS_TPREL;
7488 break;
7489 }
7490 continue;
7491
7492 case R_PPC64_TOC16:
7493 case R_PPC64_TOC16_LO:
7494 case R_PPC64_TLS:
7495 case R_PPC64_TLSGD:
7496 case R_PPC64_TLSLD:
7497 if (sym_sec == NULL || sym_sec != toc)
7498 continue;
7499
7500 /* Mark this toc entry as referenced by a TLS
7501 code sequence. We can do that now in the
7502 case of R_PPC64_TLS, and after checking for
7503 tls_get_addr for the TOC16 relocs. */
7504 if (toc_ref == NULL)
7505 {
7506 toc_ref = bfd_zmalloc (toc->size / 8);
7507 if (toc_ref == NULL)
7508 goto err_free_rel;
7509 }
7510 if (h != NULL)
7511 value = h->root.u.def.value;
7512 else
7513 value = sym->st_value;
7514 value += rel->r_addend;
7515 BFD_ASSERT (value < toc->size && value % 8 == 0);
7516 toc_ref_index = value / 8;
7517 if (r_type == R_PPC64_TLS
7518 || r_type == R_PPC64_TLSGD
7519 || r_type == R_PPC64_TLSLD)
7520 {
7521 toc_ref[toc_ref_index] = 1;
7522 continue;
7523 }
7524
7525 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7526 continue;
7527
7528 tls_set = 0;
7529 tls_clear = 0;
7530 expecting_tls_get_addr = 2;
7531 break;
7532
7533 case R_PPC64_TPREL64:
7534 if (pass == 0
7535 || sec != toc
7536 || toc_ref == NULL
7537 || !toc_ref[rel->r_offset / 8])
7538 continue;
7539 if (ok_tprel)
7540 {
7541 /* IE -> LE */
7542 tls_set = TLS_EXPLICIT;
7543 tls_clear = TLS_TPREL;
7544 break;
7545 }
7546 continue;
7547
7548 case R_PPC64_DTPMOD64:
7549 if (pass == 0
7550 || sec != toc
7551 || toc_ref == NULL
7552 || !toc_ref[rel->r_offset / 8])
7553 continue;
7554 if (rel + 1 < relend
7555 && (rel[1].r_info
7556 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7557 && rel[1].r_offset == rel->r_offset + 8)
7558 {
7559 if (ok_tprel)
7560 /* GD -> LE */
7561 tls_set = TLS_EXPLICIT | TLS_GD;
7562 else
7563 /* GD -> IE */
7564 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7565 tls_clear = TLS_GD;
7566 }
7567 else
7568 {
7569 if (!is_local)
7570 continue;
7571
7572 /* LD -> LE */
7573 tls_set = TLS_EXPLICIT;
7574 tls_clear = TLS_LD;
7575 }
7576 break;
7577
7578 default:
7579 continue;
7580 }
7581
7582 if (pass == 0)
7583 {
7584 if (!expecting_tls_get_addr
7585 || !sec->has_tls_get_addr_call)
7586 continue;
7587
7588 if (rel + 1 < relend
7589 && branch_reloc_hash_match (ibfd, rel + 1,
7590 htab->tls_get_addr,
7591 htab->tls_get_addr_fd))
7592 {
7593 if (expecting_tls_get_addr == 2)
7594 {
7595 /* Check for toc tls entries. */
7596 char *toc_tls;
7597 int retval;
7598
7599 retval = get_tls_mask (&toc_tls, NULL, NULL,
7600 &locsyms,
7601 rel, ibfd);
7602 if (retval == 0)
7603 goto err_free_rel;
7604 if (retval > 1 && toc_tls != NULL)
7605 toc_ref[toc_ref_index] = 1;
7606 }
7607 continue;
7608 }
7609
7610 if (expecting_tls_get_addr != 1)
7611 continue;
7612
7613 /* Uh oh, we didn't find the expected call. We
7614 could just mark this symbol to exclude it
7615 from tls optimization but it's safer to skip
7616 the entire section. */
7617 sec->has_tls_reloc = 0;
7618 break;
7619 }
7620
7621 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7622 {
7623 struct plt_entry *ent;
7624 for (ent = htab->tls_get_addr->elf.plt.plist;
7625 ent != NULL;
7626 ent = ent->next)
7627 if (ent->addend == 0)
7628 {
7629 if (ent->plt.refcount > 0)
7630 {
7631 ent->plt.refcount -= 1;
7632 expecting_tls_get_addr = 0;
7633 }
7634 break;
7635 }
7636 }
7637
7638 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7639 {
7640 struct plt_entry *ent;
7641 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7642 ent != NULL;
7643 ent = ent->next)
7644 if (ent->addend == 0)
7645 {
7646 if (ent->plt.refcount > 0)
7647 ent->plt.refcount -= 1;
7648 break;
7649 }
7650 }
7651
7652 if (tls_clear == 0)
7653 continue;
7654
7655 if ((tls_set & TLS_EXPLICIT) == 0)
7656 {
7657 struct got_entry *ent;
7658
7659 /* Adjust got entry for this reloc. */
7660 if (h != NULL)
7661 ent = h->got.glist;
7662 else
7663 ent = elf_local_got_ents (ibfd)[r_symndx];
7664
7665 for (; ent != NULL; ent = ent->next)
7666 if (ent->addend == rel->r_addend
7667 && ent->owner == ibfd
7668 && ent->tls_type == tls_type)
7669 break;
7670 if (ent == NULL)
7671 abort ();
7672
7673 if (tls_set == 0)
7674 {
7675 /* We managed to get rid of a got entry. */
7676 if (ent->got.refcount > 0)
7677 ent->got.refcount -= 1;
7678 }
7679 }
7680 else
7681 {
7682 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7683 we'll lose one or two dyn relocs. */
7684 if (!dec_dynrel_count (rel->r_info, sec, info,
7685 NULL, h, sym_sec))
7686 return FALSE;
7687
7688 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7689 {
7690 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7691 NULL, h, sym_sec))
7692 return FALSE;
7693 }
7694 }
7695
7696 *tls_mask |= tls_set;
7697 *tls_mask &= ~tls_clear;
7698 }
7699
7700 if (elf_section_data (sec)->relocs != relstart)
7701 free (relstart);
7702 }
7703
7704 if (toc_ref != NULL)
7705 free (toc_ref);
7706
7707 if (locsyms != NULL
7708 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7709 {
7710 if (!info->keep_memory)
7711 free (locsyms);
7712 else
7713 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7714 }
7715 }
7716 return TRUE;
7717 }
7718
7719 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7720 the values of any global symbols in a toc section that has been
7721 edited. Globals in toc sections should be a rarity, so this function
7722 sets a flag if any are found in toc sections other than the one just
7723 edited, so that futher hash table traversals can be avoided. */
7724
7725 struct adjust_toc_info
7726 {
7727 asection *toc;
7728 unsigned long *skip;
7729 bfd_boolean global_toc_syms;
7730 };
7731
7732 static bfd_boolean
7733 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7734 {
7735 struct ppc_link_hash_entry *eh;
7736 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7737
7738 if (h->root.type == bfd_link_hash_indirect)
7739 return TRUE;
7740
7741 if (h->root.type == bfd_link_hash_warning)
7742 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7743
7744 if (h->root.type != bfd_link_hash_defined
7745 && h->root.type != bfd_link_hash_defweak)
7746 return TRUE;
7747
7748 eh = (struct ppc_link_hash_entry *) h;
7749 if (eh->adjust_done)
7750 return TRUE;
7751
7752 if (eh->elf.root.u.def.section == toc_inf->toc)
7753 {
7754 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7755 if (skip != (unsigned long) -1)
7756 eh->elf.root.u.def.value -= skip;
7757 else
7758 {
7759 (*_bfd_error_handler)
7760 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7761 eh->elf.root.u.def.section = &bfd_abs_section;
7762 eh->elf.root.u.def.value = 0;
7763 }
7764 eh->adjust_done = 1;
7765 }
7766 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7767 toc_inf->global_toc_syms = TRUE;
7768
7769 return TRUE;
7770 }
7771
7772 /* Examine all relocs referencing .toc sections in order to remove
7773 unused .toc entries. */
7774
7775 bfd_boolean
7776 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7777 {
7778 bfd *ibfd;
7779 struct adjust_toc_info toc_inf;
7780
7781 toc_inf.global_toc_syms = TRUE;
7782 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7783 {
7784 asection *toc, *sec;
7785 Elf_Internal_Shdr *symtab_hdr;
7786 Elf_Internal_Sym *local_syms;
7787 struct elf_link_hash_entry **sym_hashes;
7788 Elf_Internal_Rela *relstart, *rel;
7789 unsigned long *skip, *drop;
7790 unsigned char *used;
7791 unsigned char *keep, last, some_unused;
7792
7793 toc = bfd_get_section_by_name (ibfd, ".toc");
7794 if (toc == NULL
7795 || toc->size == 0
7796 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7797 || elf_discarded_section (toc))
7798 continue;
7799
7800 local_syms = NULL;
7801 symtab_hdr = &elf_symtab_hdr (ibfd);
7802 sym_hashes = elf_sym_hashes (ibfd);
7803
7804 /* Look at sections dropped from the final link. */
7805 skip = NULL;
7806 relstart = NULL;
7807 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7808 {
7809 if (sec->reloc_count == 0
7810 || !elf_discarded_section (sec)
7811 || get_opd_info (sec)
7812 || (sec->flags & SEC_ALLOC) == 0
7813 || (sec->flags & SEC_DEBUGGING) != 0)
7814 continue;
7815
7816 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7817 if (relstart == NULL)
7818 goto error_ret;
7819
7820 /* Run through the relocs to see which toc entries might be
7821 unused. */
7822 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7823 {
7824 enum elf_ppc64_reloc_type r_type;
7825 unsigned long r_symndx;
7826 asection *sym_sec;
7827 struct elf_link_hash_entry *h;
7828 Elf_Internal_Sym *sym;
7829 bfd_vma val;
7830
7831 r_type = ELF64_R_TYPE (rel->r_info);
7832 switch (r_type)
7833 {
7834 default:
7835 continue;
7836
7837 case R_PPC64_TOC16:
7838 case R_PPC64_TOC16_LO:
7839 case R_PPC64_TOC16_HI:
7840 case R_PPC64_TOC16_HA:
7841 case R_PPC64_TOC16_DS:
7842 case R_PPC64_TOC16_LO_DS:
7843 break;
7844 }
7845
7846 r_symndx = ELF64_R_SYM (rel->r_info);
7847 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7848 r_symndx, ibfd))
7849 goto error_ret;
7850
7851 if (sym_sec != toc)
7852 continue;
7853
7854 if (h != NULL)
7855 val = h->root.u.def.value;
7856 else
7857 val = sym->st_value;
7858 val += rel->r_addend;
7859
7860 if (val >= toc->size)
7861 continue;
7862
7863 /* Anything in the toc ought to be aligned to 8 bytes.
7864 If not, don't mark as unused. */
7865 if (val & 7)
7866 continue;
7867
7868 if (skip == NULL)
7869 {
7870 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7871 if (skip == NULL)
7872 goto error_ret;
7873 }
7874
7875 skip[val >> 3] = 1;
7876 }
7877
7878 if (elf_section_data (sec)->relocs != relstart)
7879 free (relstart);
7880 }
7881
7882 if (skip == NULL)
7883 continue;
7884
7885 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7886 if (used == NULL)
7887 {
7888 error_ret:
7889 if (local_syms != NULL
7890 && symtab_hdr->contents != (unsigned char *) local_syms)
7891 free (local_syms);
7892 if (sec != NULL
7893 && relstart != NULL
7894 && elf_section_data (sec)->relocs != relstart)
7895 free (relstart);
7896 if (skip != NULL)
7897 free (skip);
7898 return FALSE;
7899 }
7900
7901 /* Now check all kept sections that might reference the toc.
7902 Check the toc itself last. */
7903 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7904 : ibfd->sections);
7905 sec != NULL;
7906 sec = (sec == toc ? NULL
7907 : sec->next == NULL ? toc
7908 : sec->next == toc && toc->next ? toc->next
7909 : sec->next))
7910 {
7911 int repeat;
7912
7913 if (sec->reloc_count == 0
7914 || elf_discarded_section (sec)
7915 || get_opd_info (sec)
7916 || (sec->flags & SEC_ALLOC) == 0
7917 || (sec->flags & SEC_DEBUGGING) != 0)
7918 continue;
7919
7920 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7921 if (relstart == NULL)
7922 goto error_ret;
7923
7924 /* Mark toc entries referenced as used. */
7925 repeat = 0;
7926 do
7927 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7928 {
7929 enum elf_ppc64_reloc_type r_type;
7930 unsigned long r_symndx;
7931 asection *sym_sec;
7932 struct elf_link_hash_entry *h;
7933 Elf_Internal_Sym *sym;
7934 bfd_vma val;
7935
7936 r_type = ELF64_R_TYPE (rel->r_info);
7937 switch (r_type)
7938 {
7939 case R_PPC64_TOC16:
7940 case R_PPC64_TOC16_LO:
7941 case R_PPC64_TOC16_HI:
7942 case R_PPC64_TOC16_HA:
7943 case R_PPC64_TOC16_DS:
7944 case R_PPC64_TOC16_LO_DS:
7945 /* In case we're taking addresses of toc entries. */
7946 case R_PPC64_ADDR64:
7947 break;
7948
7949 default:
7950 continue;
7951 }
7952
7953 r_symndx = ELF64_R_SYM (rel->r_info);
7954 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7955 r_symndx, ibfd))
7956 {
7957 free (used);
7958 goto error_ret;
7959 }
7960
7961 if (sym_sec != toc)
7962 continue;
7963
7964 if (h != NULL)
7965 val = h->root.u.def.value;
7966 else
7967 val = sym->st_value;
7968 val += rel->r_addend;
7969
7970 if (val >= toc->size)
7971 continue;
7972
7973 /* For the toc section, we only mark as used if
7974 this entry itself isn't unused. */
7975 if (sec == toc
7976 && !used[val >> 3]
7977 && (used[rel->r_offset >> 3]
7978 || !skip[rel->r_offset >> 3]))
7979 /* Do all the relocs again, to catch reference
7980 chains. */
7981 repeat = 1;
7982
7983 used[val >> 3] = 1;
7984 }
7985 while (repeat);
7986 }
7987
7988 /* Merge the used and skip arrays. Assume that TOC
7989 doublewords not appearing as either used or unused belong
7990 to to an entry more than one doubleword in size. */
7991 for (drop = skip, keep = used, last = 0, some_unused = 0;
7992 drop < skip + (toc->size + 7) / 8;
7993 ++drop, ++keep)
7994 {
7995 if (*keep)
7996 {
7997 *drop = 0;
7998 last = 0;
7999 }
8000 else if (*drop)
8001 {
8002 some_unused = 1;
8003 last = 1;
8004 }
8005 else
8006 *drop = last;
8007 }
8008
8009 free (used);
8010
8011 if (some_unused)
8012 {
8013 bfd_byte *contents, *src;
8014 unsigned long off;
8015
8016 /* Shuffle the toc contents, and at the same time convert the
8017 skip array from booleans into offsets. */
8018 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8019 goto error_ret;
8020
8021 elf_section_data (toc)->this_hdr.contents = contents;
8022
8023 for (src = contents, off = 0, drop = skip;
8024 src < contents + toc->size;
8025 src += 8, ++drop)
8026 {
8027 if (*drop)
8028 {
8029 *drop = (unsigned long) -1;
8030 off += 8;
8031 }
8032 else if (off != 0)
8033 {
8034 *drop = off;
8035 memcpy (src - off, src, 8);
8036 }
8037 }
8038 toc->rawsize = toc->size;
8039 toc->size = src - contents - off;
8040
8041 if (toc->reloc_count != 0)
8042 {
8043 Elf_Internal_Rela *wrel;
8044 bfd_size_type sz;
8045
8046 /* Read toc relocs. */
8047 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8048 TRUE);
8049 if (relstart == NULL)
8050 goto error_ret;
8051
8052 /* Remove unused toc relocs, and adjust those we keep. */
8053 wrel = relstart;
8054 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8055 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
8056 {
8057 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8058 wrel->r_info = rel->r_info;
8059 wrel->r_addend = rel->r_addend;
8060 ++wrel;
8061 }
8062 else if (!dec_dynrel_count (rel->r_info, toc, info,
8063 &local_syms, NULL, NULL))
8064 goto error_ret;
8065
8066 toc->reloc_count = wrel - relstart;
8067 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
8068 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
8069 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
8070 }
8071
8072 /* Adjust addends for relocs against the toc section sym. */
8073 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8074 {
8075 if (sec->reloc_count == 0
8076 || elf_discarded_section (sec))
8077 continue;
8078
8079 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8080 TRUE);
8081 if (relstart == NULL)
8082 goto error_ret;
8083
8084 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8085 {
8086 enum elf_ppc64_reloc_type r_type;
8087 unsigned long r_symndx;
8088 asection *sym_sec;
8089 struct elf_link_hash_entry *h;
8090 Elf_Internal_Sym *sym;
8091
8092 r_type = ELF64_R_TYPE (rel->r_info);
8093 switch (r_type)
8094 {
8095 default:
8096 continue;
8097
8098 case R_PPC64_TOC16:
8099 case R_PPC64_TOC16_LO:
8100 case R_PPC64_TOC16_HI:
8101 case R_PPC64_TOC16_HA:
8102 case R_PPC64_TOC16_DS:
8103 case R_PPC64_TOC16_LO_DS:
8104 case R_PPC64_ADDR64:
8105 break;
8106 }
8107
8108 r_symndx = ELF64_R_SYM (rel->r_info);
8109 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8110 r_symndx, ibfd))
8111 goto error_ret;
8112
8113 if (sym_sec != toc || h != NULL || sym->st_value != 0)
8114 continue;
8115
8116 rel->r_addend -= skip[rel->r_addend >> 3];
8117 }
8118 }
8119
8120 /* We shouldn't have local or global symbols defined in the TOC,
8121 but handle them anyway. */
8122 if (local_syms != NULL)
8123 {
8124 Elf_Internal_Sym *sym;
8125
8126 for (sym = local_syms;
8127 sym < local_syms + symtab_hdr->sh_info;
8128 ++sym)
8129 if (sym->st_value != 0
8130 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8131 {
8132 if (skip[sym->st_value >> 3] != (unsigned long) -1)
8133 sym->st_value -= skip[sym->st_value >> 3];
8134 else
8135 {
8136 (*_bfd_error_handler)
8137 (_("%s defined in removed toc entry"),
8138 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8139 NULL));
8140 sym->st_value = 0;
8141 sym->st_shndx = SHN_ABS;
8142 }
8143 symtab_hdr->contents = (unsigned char *) local_syms;
8144 }
8145 }
8146
8147 /* Finally, adjust any global syms defined in the toc. */
8148 if (toc_inf.global_toc_syms)
8149 {
8150 toc_inf.toc = toc;
8151 toc_inf.skip = skip;
8152 toc_inf.global_toc_syms = FALSE;
8153 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8154 &toc_inf);
8155 }
8156 }
8157
8158 if (local_syms != NULL
8159 && symtab_hdr->contents != (unsigned char *) local_syms)
8160 {
8161 if (!info->keep_memory)
8162 free (local_syms);
8163 else
8164 symtab_hdr->contents = (unsigned char *) local_syms;
8165 }
8166 free (skip);
8167 }
8168
8169 return TRUE;
8170 }
8171
8172 /* Allocate space in .plt, .got and associated reloc sections for
8173 dynamic relocs. */
8174
8175 static bfd_boolean
8176 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8177 {
8178 struct bfd_link_info *info;
8179 struct ppc_link_hash_table *htab;
8180 asection *s;
8181 struct ppc_link_hash_entry *eh;
8182 struct ppc_dyn_relocs *p;
8183 struct got_entry *gent;
8184
8185 if (h->root.type == bfd_link_hash_indirect)
8186 return TRUE;
8187
8188 if (h->root.type == bfd_link_hash_warning)
8189 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8190
8191 info = (struct bfd_link_info *) inf;
8192 htab = ppc_hash_table (info);
8193
8194 if ((htab->elf.dynamic_sections_created
8195 && h->dynindx != -1
8196 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8197 || h->type == STT_GNU_IFUNC)
8198 {
8199 struct plt_entry *pent;
8200 bfd_boolean doneone = FALSE;
8201 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8202 if (pent->plt.refcount > 0)
8203 {
8204 if (!htab->elf.dynamic_sections_created
8205 || h->dynindx == -1)
8206 {
8207 s = htab->iplt;
8208 pent->plt.offset = s->size;
8209 s->size += PLT_ENTRY_SIZE;
8210 s = htab->reliplt;
8211 }
8212 else
8213 {
8214 /* If this is the first .plt entry, make room for the special
8215 first entry. */
8216 s = htab->plt;
8217 if (s->size == 0)
8218 s->size += PLT_INITIAL_ENTRY_SIZE;
8219
8220 pent->plt.offset = s->size;
8221
8222 /* Make room for this entry. */
8223 s->size += PLT_ENTRY_SIZE;
8224
8225 /* Make room for the .glink code. */
8226 s = htab->glink;
8227 if (s->size == 0)
8228 s->size += GLINK_CALL_STUB_SIZE;
8229 /* We need bigger stubs past index 32767. */
8230 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8231 s->size += 4;
8232 s->size += 2*4;
8233
8234 /* We also need to make an entry in the .rela.plt section. */
8235 s = htab->relplt;
8236 }
8237 s->size += sizeof (Elf64_External_Rela);
8238 doneone = TRUE;
8239 }
8240 else
8241 pent->plt.offset = (bfd_vma) -1;
8242 if (!doneone)
8243 {
8244 h->plt.plist = NULL;
8245 h->needs_plt = 0;
8246 }
8247 }
8248 else
8249 {
8250 h->plt.plist = NULL;
8251 h->needs_plt = 0;
8252 }
8253
8254 eh = (struct ppc_link_hash_entry *) h;
8255 /* Run through the TLS GD got entries first if we're changing them
8256 to TPREL. */
8257 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8258 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8259 if (gent->got.refcount > 0
8260 && (gent->tls_type & TLS_GD) != 0)
8261 {
8262 /* This was a GD entry that has been converted to TPREL. If
8263 there happens to be a TPREL entry we can use that one. */
8264 struct got_entry *ent;
8265 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8266 if (ent->got.refcount > 0
8267 && (ent->tls_type & TLS_TPREL) != 0
8268 && ent->addend == gent->addend
8269 && ent->owner == gent->owner)
8270 {
8271 gent->got.refcount = 0;
8272 break;
8273 }
8274
8275 /* If not, then we'll be using our own TPREL entry. */
8276 if (gent->got.refcount != 0)
8277 gent->tls_type = TLS_TLS | TLS_TPREL;
8278 }
8279
8280 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8281 if (gent->got.refcount > 0)
8282 {
8283 bfd_boolean dyn;
8284 asection *rsec;
8285
8286 /* Make sure this symbol is output as a dynamic symbol.
8287 Undefined weak syms won't yet be marked as dynamic,
8288 nor will all TLS symbols. */
8289 if (h->dynindx == -1
8290 && !h->forced_local
8291 && h->type != STT_GNU_IFUNC
8292 && htab->elf.dynamic_sections_created)
8293 {
8294 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8295 return FALSE;
8296 }
8297
8298 if ((gent->tls_type & TLS_LD) != 0
8299 && !h->def_dynamic)
8300 {
8301 ppc64_tlsld_got (gent->owner)->refcount += 1;
8302 gent->got.offset = (bfd_vma) -1;
8303 continue;
8304 }
8305
8306 if (!is_ppc64_elf (gent->owner))
8307 continue;
8308
8309 s = ppc64_elf_tdata (gent->owner)->got;
8310 gent->got.offset = s->size;
8311 s->size
8312 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
8313 dyn = htab->elf.dynamic_sections_created;
8314 rsec = NULL;
8315 if ((info->shared
8316 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8317 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8318 || h->root.type != bfd_link_hash_undefweak))
8319 rsec = ppc64_elf_tdata (gent->owner)->relgot;
8320 else if (h->type == STT_GNU_IFUNC)
8321 rsec = htab->reliplt;
8322 if (rsec != NULL)
8323 rsec->size += (gent->tls_type & eh->tls_mask & TLS_GD
8324 ? 2 * sizeof (Elf64_External_Rela)
8325 : sizeof (Elf64_External_Rela));
8326 }
8327 else
8328 gent->got.offset = (bfd_vma) -1;
8329
8330 if (eh->dyn_relocs == NULL
8331 || (!htab->elf.dynamic_sections_created
8332 && h->type != STT_GNU_IFUNC))
8333 return TRUE;
8334
8335 /* In the shared -Bsymbolic case, discard space allocated for
8336 dynamic pc-relative relocs against symbols which turn out to be
8337 defined in regular objects. For the normal shared case, discard
8338 space for relocs that have become local due to symbol visibility
8339 changes. */
8340
8341 if (info->shared)
8342 {
8343 /* Relocs that use pc_count are those that appear on a call insn,
8344 or certain REL relocs (see must_be_dyn_reloc) that can be
8345 generated via assembly. We want calls to protected symbols to
8346 resolve directly to the function rather than going via the plt.
8347 If people want function pointer comparisons to work as expected
8348 then they should avoid writing weird assembly. */
8349 if (SYMBOL_CALLS_LOCAL (info, h))
8350 {
8351 struct ppc_dyn_relocs **pp;
8352
8353 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8354 {
8355 p->count -= p->pc_count;
8356 p->pc_count = 0;
8357 if (p->count == 0)
8358 *pp = p->next;
8359 else
8360 pp = &p->next;
8361 }
8362 }
8363
8364 /* Also discard relocs on undefined weak syms with non-default
8365 visibility. */
8366 if (eh->dyn_relocs != NULL
8367 && h->root.type == bfd_link_hash_undefweak)
8368 {
8369 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8370 eh->dyn_relocs = NULL;
8371
8372 /* Make sure this symbol is output as a dynamic symbol.
8373 Undefined weak syms won't yet be marked as dynamic. */
8374 else if (h->dynindx == -1
8375 && !h->forced_local)
8376 {
8377 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8378 return FALSE;
8379 }
8380 }
8381 }
8382 else if (h->type == STT_GNU_IFUNC)
8383 {
8384 if (!h->non_got_ref)
8385 eh->dyn_relocs = NULL;
8386 }
8387 else if (ELIMINATE_COPY_RELOCS)
8388 {
8389 /* For the non-shared case, discard space for relocs against
8390 symbols which turn out to need copy relocs or are not
8391 dynamic. */
8392
8393 if (!h->non_got_ref
8394 && !h->def_regular)
8395 {
8396 /* Make sure this symbol is output as a dynamic symbol.
8397 Undefined weak syms won't yet be marked as dynamic. */
8398 if (h->dynindx == -1
8399 && !h->forced_local)
8400 {
8401 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8402 return FALSE;
8403 }
8404
8405 /* If that succeeded, we know we'll be keeping all the
8406 relocs. */
8407 if (h->dynindx != -1)
8408 goto keep;
8409 }
8410
8411 eh->dyn_relocs = NULL;
8412
8413 keep: ;
8414 }
8415
8416 /* Finally, allocate space. */
8417 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8418 {
8419 asection *sreloc = elf_section_data (p->sec)->sreloc;
8420 if (!htab->elf.dynamic_sections_created)
8421 sreloc = htab->reliplt;
8422 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8423 }
8424
8425 return TRUE;
8426 }
8427
8428 /* Find any dynamic relocs that apply to read-only sections. */
8429
8430 static bfd_boolean
8431 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8432 {
8433 struct ppc_link_hash_entry *eh;
8434 struct ppc_dyn_relocs *p;
8435
8436 if (h->root.type == bfd_link_hash_warning)
8437 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8438
8439 eh = (struct ppc_link_hash_entry *) h;
8440 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8441 {
8442 asection *s = p->sec->output_section;
8443
8444 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8445 {
8446 struct bfd_link_info *info = inf;
8447
8448 info->flags |= DF_TEXTREL;
8449
8450 /* Not an error, just cut short the traversal. */
8451 return FALSE;
8452 }
8453 }
8454 return TRUE;
8455 }
8456
8457 /* Set the sizes of the dynamic sections. */
8458
8459 static bfd_boolean
8460 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8461 struct bfd_link_info *info)
8462 {
8463 struct ppc_link_hash_table *htab;
8464 bfd *dynobj;
8465 asection *s;
8466 bfd_boolean relocs;
8467 bfd *ibfd;
8468
8469 htab = ppc_hash_table (info);
8470 dynobj = htab->elf.dynobj;
8471 if (dynobj == NULL)
8472 abort ();
8473
8474 if (htab->elf.dynamic_sections_created)
8475 {
8476 /* Set the contents of the .interp section to the interpreter. */
8477 if (info->executable)
8478 {
8479 s = bfd_get_section_by_name (dynobj, ".interp");
8480 if (s == NULL)
8481 abort ();
8482 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8483 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8484 }
8485 }
8486
8487 /* Set up .got offsets for local syms, and space for local dynamic
8488 relocs. */
8489 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8490 {
8491 struct got_entry **lgot_ents;
8492 struct got_entry **end_lgot_ents;
8493 struct plt_entry **local_plt;
8494 struct plt_entry **end_local_plt;
8495 char *lgot_masks;
8496 bfd_size_type locsymcount;
8497 Elf_Internal_Shdr *symtab_hdr;
8498 asection *srel;
8499
8500 if (!is_ppc64_elf (ibfd))
8501 continue;
8502
8503 for (s = ibfd->sections; s != NULL; s = s->next)
8504 {
8505 struct ppc_dyn_relocs *p;
8506
8507 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8508 {
8509 if (!bfd_is_abs_section (p->sec)
8510 && bfd_is_abs_section (p->sec->output_section))
8511 {
8512 /* Input section has been discarded, either because
8513 it is a copy of a linkonce section or due to
8514 linker script /DISCARD/, so we'll be discarding
8515 the relocs too. */
8516 }
8517 else if (p->count != 0)
8518 {
8519 srel = elf_section_data (p->sec)->sreloc;
8520 if (!htab->elf.dynamic_sections_created)
8521 srel = htab->reliplt;
8522 srel->size += p->count * sizeof (Elf64_External_Rela);
8523 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8524 info->flags |= DF_TEXTREL;
8525 }
8526 }
8527 }
8528
8529 lgot_ents = elf_local_got_ents (ibfd);
8530 if (!lgot_ents)
8531 continue;
8532
8533 symtab_hdr = &elf_symtab_hdr (ibfd);
8534 locsymcount = symtab_hdr->sh_info;
8535 end_lgot_ents = lgot_ents + locsymcount;
8536 local_plt = (struct plt_entry **) end_lgot_ents;
8537 end_local_plt = local_plt + locsymcount;
8538 lgot_masks = (char *) end_local_plt;
8539 s = ppc64_elf_tdata (ibfd)->got;
8540 srel = ppc64_elf_tdata (ibfd)->relgot;
8541 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8542 {
8543 struct got_entry *ent;
8544
8545 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
8546 if (ent->got.refcount > 0)
8547 {
8548 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8549 {
8550 ppc64_tlsld_got (ibfd)->refcount += 1;
8551 ent->got.offset = (bfd_vma) -1;
8552 }
8553 else
8554 {
8555 unsigned int num = 1;
8556 ent->got.offset = s->size;
8557 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8558 num = 2;
8559 s->size += num * 8;
8560 if (info->shared)
8561 srel->size += num * sizeof (Elf64_External_Rela);
8562 else if ((*lgot_masks & PLT_IFUNC) != 0)
8563 htab->reliplt->size += num * sizeof (Elf64_External_Rela);
8564 }
8565 }
8566 else
8567 ent->got.offset = (bfd_vma) -1;
8568 }
8569
8570 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8571 for (; local_plt < end_local_plt; ++local_plt)
8572 {
8573 struct plt_entry *ent;
8574
8575 for (ent = *local_plt; ent != NULL; ent = ent->next)
8576 if (ent->plt.refcount > 0)
8577 {
8578 asection *s = htab->iplt;
8579
8580 ent->plt.offset = s->size;
8581 s->size += PLT_ENTRY_SIZE;
8582
8583 htab->reliplt->size += sizeof (Elf64_External_Rela);
8584 }
8585 else
8586 ent->plt.offset = (bfd_vma) -1;
8587 }
8588 }
8589
8590 /* Allocate global sym .plt and .got entries, and space for global
8591 sym dynamic relocs. */
8592 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8593
8594 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8595 {
8596 if (!is_ppc64_elf (ibfd))
8597 continue;
8598
8599 if (ppc64_tlsld_got (ibfd)->refcount > 0)
8600 {
8601 s = ppc64_elf_tdata (ibfd)->got;
8602 ppc64_tlsld_got (ibfd)->offset = s->size;
8603 s->size += 16;
8604 if (info->shared)
8605 {
8606 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8607 srel->size += sizeof (Elf64_External_Rela);
8608 }
8609 }
8610 else
8611 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
8612 }
8613
8614 /* We now have determined the sizes of the various dynamic sections.
8615 Allocate memory for them. */
8616 relocs = FALSE;
8617 for (s = dynobj->sections; s != NULL; s = s->next)
8618 {
8619 if ((s->flags & SEC_LINKER_CREATED) == 0)
8620 continue;
8621
8622 if (s == htab->brlt || s == htab->relbrlt)
8623 /* These haven't been allocated yet; don't strip. */
8624 continue;
8625 else if (s == htab->got
8626 || s == htab->plt
8627 || s == htab->iplt
8628 || s == htab->glink
8629 || s == htab->dynbss)
8630 {
8631 /* Strip this section if we don't need it; see the
8632 comment below. */
8633 }
8634 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8635 {
8636 if (s->size != 0)
8637 {
8638 if (s != htab->relplt)
8639 relocs = TRUE;
8640
8641 /* We use the reloc_count field as a counter if we need
8642 to copy relocs into the output file. */
8643 s->reloc_count = 0;
8644 }
8645 }
8646 else
8647 {
8648 /* It's not one of our sections, so don't allocate space. */
8649 continue;
8650 }
8651
8652 if (s->size == 0)
8653 {
8654 /* If we don't need this section, strip it from the
8655 output file. This is mostly to handle .rela.bss and
8656 .rela.plt. We must create both sections in
8657 create_dynamic_sections, because they must be created
8658 before the linker maps input sections to output
8659 sections. The linker does that before
8660 adjust_dynamic_symbol is called, and it is that
8661 function which decides whether anything needs to go
8662 into these sections. */
8663 s->flags |= SEC_EXCLUDE;
8664 continue;
8665 }
8666
8667 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8668 continue;
8669
8670 /* Allocate memory for the section contents. We use bfd_zalloc
8671 here in case unused entries are not reclaimed before the
8672 section's contents are written out. This should not happen,
8673 but this way if it does we get a R_PPC64_NONE reloc in .rela
8674 sections instead of garbage.
8675 We also rely on the section contents being zero when writing
8676 the GOT. */
8677 s->contents = bfd_zalloc (dynobj, s->size);
8678 if (s->contents == NULL)
8679 return FALSE;
8680 }
8681
8682 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8683 {
8684 if (!is_ppc64_elf (ibfd))
8685 continue;
8686
8687 s = ppc64_elf_tdata (ibfd)->got;
8688 if (s != NULL && s != htab->got)
8689 {
8690 if (s->size == 0)
8691 s->flags |= SEC_EXCLUDE;
8692 else
8693 {
8694 s->contents = bfd_zalloc (ibfd, s->size);
8695 if (s->contents == NULL)
8696 return FALSE;
8697 }
8698 }
8699 s = ppc64_elf_tdata (ibfd)->relgot;
8700 if (s != NULL)
8701 {
8702 if (s->size == 0)
8703 s->flags |= SEC_EXCLUDE;
8704 else
8705 {
8706 s->contents = bfd_zalloc (ibfd, s->size);
8707 if (s->contents == NULL)
8708 return FALSE;
8709 relocs = TRUE;
8710 s->reloc_count = 0;
8711 }
8712 }
8713 }
8714
8715 if (htab->elf.dynamic_sections_created)
8716 {
8717 /* Add some entries to the .dynamic section. We fill in the
8718 values later, in ppc64_elf_finish_dynamic_sections, but we
8719 must add the entries now so that we get the correct size for
8720 the .dynamic section. The DT_DEBUG entry is filled in by the
8721 dynamic linker and used by the debugger. */
8722 #define add_dynamic_entry(TAG, VAL) \
8723 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8724
8725 if (info->executable)
8726 {
8727 if (!add_dynamic_entry (DT_DEBUG, 0))
8728 return FALSE;
8729 }
8730
8731 if (htab->plt != NULL && htab->plt->size != 0)
8732 {
8733 if (!add_dynamic_entry (DT_PLTGOT, 0)
8734 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8735 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8736 || !add_dynamic_entry (DT_JMPREL, 0)
8737 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8738 return FALSE;
8739 }
8740
8741 if (NO_OPD_RELOCS)
8742 {
8743 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8744 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8745 return FALSE;
8746 }
8747
8748 if (!htab->no_tls_get_addr_opt
8749 && htab->tls_get_addr_fd != NULL
8750 && htab->tls_get_addr_fd->elf.plt.plist != NULL
8751 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
8752 return FALSE;
8753
8754 if (relocs)
8755 {
8756 if (!add_dynamic_entry (DT_RELA, 0)
8757 || !add_dynamic_entry (DT_RELASZ, 0)
8758 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8759 return FALSE;
8760
8761 /* If any dynamic relocs apply to a read-only section,
8762 then we need a DT_TEXTREL entry. */
8763 if ((info->flags & DF_TEXTREL) == 0)
8764 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8765
8766 if ((info->flags & DF_TEXTREL) != 0)
8767 {
8768 if (!add_dynamic_entry (DT_TEXTREL, 0))
8769 return FALSE;
8770 }
8771 }
8772 }
8773 #undef add_dynamic_entry
8774
8775 return TRUE;
8776 }
8777
8778 /* Determine the type of stub needed, if any, for a call. */
8779
8780 static inline enum ppc_stub_type
8781 ppc_type_of_stub (asection *input_sec,
8782 const Elf_Internal_Rela *rel,
8783 struct ppc_link_hash_entry **hash,
8784 struct plt_entry **plt_ent,
8785 bfd_vma destination)
8786 {
8787 struct ppc_link_hash_entry *h = *hash;
8788 bfd_vma location;
8789 bfd_vma branch_offset;
8790 bfd_vma max_branch_offset;
8791 enum elf_ppc64_reloc_type r_type;
8792
8793 if (h != NULL)
8794 {
8795 struct plt_entry *ent;
8796 struct ppc_link_hash_entry *fdh = h;
8797 if (h->oh != NULL
8798 && h->oh->is_func_descriptor)
8799 fdh = ppc_follow_link (h->oh);
8800
8801 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8802 if (ent->addend == rel->r_addend
8803 && ent->plt.offset != (bfd_vma) -1)
8804 {
8805 *hash = fdh;
8806 *plt_ent = ent;
8807 return ppc_stub_plt_call;
8808 }
8809
8810 /* Here, we know we don't have a plt entry. If we don't have a
8811 either a defined function descriptor or a defined entry symbol
8812 in a regular object file, then it is pointless trying to make
8813 any other type of stub. */
8814 if (!((fdh->elf.root.type == bfd_link_hash_defined
8815 || fdh->elf.root.type == bfd_link_hash_defweak)
8816 && fdh->elf.root.u.def.section->output_section != NULL)
8817 && !((h->elf.root.type == bfd_link_hash_defined
8818 || h->elf.root.type == bfd_link_hash_defweak)
8819 && h->elf.root.u.def.section->output_section != NULL))
8820 return ppc_stub_none;
8821 }
8822 else if (elf_local_got_ents (input_sec->owner) != NULL)
8823 {
8824 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
8825 struct plt_entry **local_plt = (struct plt_entry **)
8826 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
8827 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
8828
8829 if (local_plt[r_symndx] != NULL)
8830 {
8831 struct plt_entry *ent;
8832
8833 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
8834 if (ent->addend == rel->r_addend
8835 && ent->plt.offset != (bfd_vma) -1)
8836 {
8837 *plt_ent = ent;
8838 return ppc_stub_plt_call;
8839 }
8840 }
8841 }
8842
8843 /* Determine where the call point is. */
8844 location = (input_sec->output_offset
8845 + input_sec->output_section->vma
8846 + rel->r_offset);
8847
8848 branch_offset = destination - location;
8849 r_type = ELF64_R_TYPE (rel->r_info);
8850
8851 /* Determine if a long branch stub is needed. */
8852 max_branch_offset = 1 << 25;
8853 if (r_type != R_PPC64_REL24)
8854 max_branch_offset = 1 << 15;
8855
8856 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8857 /* We need a stub. Figure out whether a long_branch or plt_branch
8858 is needed later. */
8859 return ppc_stub_long_branch;
8860
8861 return ppc_stub_none;
8862 }
8863
8864 /* Build a .plt call stub. */
8865
8866 static inline bfd_byte *
8867 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
8868 {
8869 #define PPC_LO(v) ((v) & 0xffff)
8870 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8871 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8872
8873 if (PPC_HA (offset) != 0)
8874 {
8875 if (r != NULL)
8876 {
8877 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
8878 r[1].r_offset = r[0].r_offset + 8;
8879 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8880 r[1].r_addend = r[0].r_addend;
8881 if (PPC_HA (offset + 16) != PPC_HA (offset))
8882 {
8883 r[2].r_offset = r[1].r_offset + 4;
8884 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
8885 r[2].r_addend = r[0].r_addend;
8886 }
8887 else
8888 {
8889 r[2].r_offset = r[1].r_offset + 8;
8890 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8891 r[2].r_addend = r[0].r_addend + 8;
8892 r[3].r_offset = r[2].r_offset + 4;
8893 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8894 r[3].r_addend = r[0].r_addend + 16;
8895 }
8896 }
8897 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8898 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8899 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8900 if (PPC_HA (offset + 16) != PPC_HA (offset))
8901 {
8902 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8903 offset = 0;
8904 }
8905 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8906 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8907 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8908 bfd_put_32 (obfd, BCTR, p), p += 4;
8909 }
8910 else
8911 {
8912 if (r != NULL)
8913 {
8914 r[0].r_offset += 4;
8915 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8916 if (PPC_HA (offset + 16) != PPC_HA (offset))
8917 {
8918 r[1].r_offset = r[0].r_offset + 4;
8919 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
8920 r[1].r_addend = r[0].r_addend;
8921 }
8922 else
8923 {
8924 r[1].r_offset = r[0].r_offset + 8;
8925 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8926 r[1].r_addend = r[0].r_addend + 16;
8927 r[2].r_offset = r[1].r_offset + 4;
8928 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8929 r[2].r_addend = r[0].r_addend + 8;
8930 }
8931 }
8932 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8933 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8934 if (PPC_HA (offset + 16) != PPC_HA (offset))
8935 {
8936 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8937 offset = 0;
8938 }
8939 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8940 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8941 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8942 bfd_put_32 (obfd, BCTR, p), p += 4;
8943 }
8944 return p;
8945 }
8946
8947 /* Build a special .plt call stub for __tls_get_addr. */
8948
8949 #define LD_R11_0R3 0xe9630000
8950 #define LD_R12_0R3 0xe9830000
8951 #define MR_R0_R3 0x7c601b78
8952 #define CMPDI_R11_0 0x2c2b0000
8953 #define ADD_R3_R12_R13 0x7c6c6a14
8954 #define BEQLR 0x4d820020
8955 #define MR_R3_R0 0x7c030378
8956 #define MFLR_R11 0x7d6802a6
8957 #define STD_R11_0R1 0xf9610000
8958 #define BCTRL 0x4e800421
8959 #define LD_R11_0R1 0xe9610000
8960 #define LD_R2_0R1 0xe8410000
8961 #define MTLR_R11 0x7d6803a6
8962
8963 static inline bfd_byte *
8964 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
8965 Elf_Internal_Rela *r)
8966 {
8967 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
8968 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
8969 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
8970 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
8971 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
8972 bfd_put_32 (obfd, BEQLR, p), p += 4;
8973 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
8974 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
8975 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
8976
8977 if (r != NULL)
8978 r[0].r_offset += 9 * 4;
8979 p = build_plt_stub (obfd, p, offset, r);
8980 bfd_put_32 (obfd, BCTRL, p - 4);
8981
8982 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
8983 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
8984 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
8985 bfd_put_32 (obfd, BLR, p), p += 4;
8986
8987 return p;
8988 }
8989
8990 static Elf_Internal_Rela *
8991 get_relocs (asection *sec, int count)
8992 {
8993 Elf_Internal_Rela *relocs;
8994 struct bfd_elf_section_data *elfsec_data;
8995
8996 elfsec_data = elf_section_data (sec);
8997 relocs = elfsec_data->relocs;
8998 if (relocs == NULL)
8999 {
9000 bfd_size_type relsize;
9001 relsize = sec->reloc_count * sizeof (*relocs);
9002 relocs = bfd_alloc (sec->owner, relsize);
9003 if (relocs == NULL)
9004 return NULL;
9005 elfsec_data->relocs = relocs;
9006 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
9007 * sizeof (Elf64_External_Rela));
9008 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
9009 sec->reloc_count = 0;
9010 }
9011 relocs += sec->reloc_count;
9012 sec->reloc_count += count;
9013 return relocs;
9014 }
9015
9016 static bfd_boolean
9017 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9018 {
9019 struct ppc_stub_hash_entry *stub_entry;
9020 struct ppc_branch_hash_entry *br_entry;
9021 struct bfd_link_info *info;
9022 struct ppc_link_hash_table *htab;
9023 bfd_byte *loc;
9024 bfd_byte *p;
9025 bfd_vma dest, off;
9026 int size;
9027 Elf_Internal_Rela *r;
9028 asection *plt;
9029
9030 /* Massage our args to the form they really have. */
9031 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9032 info = in_arg;
9033
9034 htab = ppc_hash_table (info);
9035
9036 /* Make a note of the offset within the stubs for this entry. */
9037 stub_entry->stub_offset = stub_entry->stub_sec->size;
9038 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9039
9040 htab->stub_count[stub_entry->stub_type - 1] += 1;
9041 switch (stub_entry->stub_type)
9042 {
9043 case ppc_stub_long_branch:
9044 case ppc_stub_long_branch_r2off:
9045 /* Branches are relative. This is where we are going to. */
9046 off = dest = (stub_entry->target_value
9047 + stub_entry->target_section->output_offset
9048 + stub_entry->target_section->output_section->vma);
9049
9050 /* And this is where we are coming from. */
9051 off -= (stub_entry->stub_offset
9052 + stub_entry->stub_sec->output_offset
9053 + stub_entry->stub_sec->output_section->vma);
9054
9055 size = 4;
9056 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9057 {
9058 bfd_vma r2off;
9059
9060 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9061 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9062 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9063 loc += 4;
9064 size = 12;
9065 if (PPC_HA (r2off) != 0)
9066 {
9067 size = 16;
9068 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9069 loc += 4;
9070 }
9071 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9072 loc += 4;
9073 off -= size - 4;
9074 }
9075 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9076
9077 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9078 {
9079 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9080 stub_entry->root.string);
9081 htab->stub_error = TRUE;
9082 return FALSE;
9083 }
9084
9085 if (info->emitrelocations)
9086 {
9087 r = get_relocs (stub_entry->stub_sec, 1);
9088 if (r == NULL)
9089 return FALSE;
9090 r->r_offset = loc - stub_entry->stub_sec->contents;
9091 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9092 r->r_addend = dest;
9093 if (stub_entry->h != NULL)
9094 {
9095 struct elf_link_hash_entry **hashes;
9096 unsigned long symndx;
9097 struct ppc_link_hash_entry *h;
9098
9099 hashes = elf_sym_hashes (htab->stub_bfd);
9100 if (hashes == NULL)
9101 {
9102 bfd_size_type hsize;
9103
9104 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9105 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9106 if (hashes == NULL)
9107 return FALSE;
9108 elf_sym_hashes (htab->stub_bfd) = hashes;
9109 htab->stub_globals = 1;
9110 }
9111 symndx = htab->stub_globals++;
9112 h = stub_entry->h;
9113 hashes[symndx] = &h->elf;
9114 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9115 if (h->oh != NULL && h->oh->is_func)
9116 h = ppc_follow_link (h->oh);
9117 if (h->elf.root.u.def.section != stub_entry->target_section)
9118 /* H is an opd symbol. The addend must be zero. */
9119 r->r_addend = 0;
9120 else
9121 {
9122 off = (h->elf.root.u.def.value
9123 + h->elf.root.u.def.section->output_offset
9124 + h->elf.root.u.def.section->output_section->vma);
9125 r->r_addend -= off;
9126 }
9127 }
9128 }
9129 break;
9130
9131 case ppc_stub_plt_branch:
9132 case ppc_stub_plt_branch_r2off:
9133 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9134 stub_entry->root.string + 9,
9135 FALSE, FALSE);
9136 if (br_entry == NULL)
9137 {
9138 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9139 stub_entry->root.string);
9140 htab->stub_error = TRUE;
9141 return FALSE;
9142 }
9143
9144 dest = (stub_entry->target_value
9145 + stub_entry->target_section->output_offset
9146 + stub_entry->target_section->output_section->vma);
9147
9148 bfd_put_64 (htab->brlt->owner, dest,
9149 htab->brlt->contents + br_entry->offset);
9150
9151 if (br_entry->iter == htab->stub_iteration)
9152 {
9153 br_entry->iter = 0;
9154
9155 if (htab->relbrlt != NULL)
9156 {
9157 /* Create a reloc for the branch lookup table entry. */
9158 Elf_Internal_Rela rela;
9159 bfd_byte *rl;
9160
9161 rela.r_offset = (br_entry->offset
9162 + htab->brlt->output_offset
9163 + htab->brlt->output_section->vma);
9164 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9165 rela.r_addend = dest;
9166
9167 rl = htab->relbrlt->contents;
9168 rl += (htab->relbrlt->reloc_count++
9169 * sizeof (Elf64_External_Rela));
9170 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9171 }
9172 else if (info->emitrelocations)
9173 {
9174 r = get_relocs (htab->brlt, 1);
9175 if (r == NULL)
9176 return FALSE;
9177 /* brlt, being SEC_LINKER_CREATED does not go through the
9178 normal reloc processing. Symbols and offsets are not
9179 translated from input file to output file form, so
9180 set up the offset per the output file. */
9181 r->r_offset = (br_entry->offset
9182 + htab->brlt->output_offset
9183 + htab->brlt->output_section->vma);
9184 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9185 r->r_addend = dest;
9186 }
9187 }
9188
9189 dest = (br_entry->offset
9190 + htab->brlt->output_offset
9191 + htab->brlt->output_section->vma);
9192
9193 off = (dest
9194 - elf_gp (htab->brlt->output_section->owner)
9195 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9196
9197 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9198 {
9199 (*_bfd_error_handler)
9200 (_("linkage table error against `%s'"),
9201 stub_entry->root.string);
9202 bfd_set_error (bfd_error_bad_value);
9203 htab->stub_error = TRUE;
9204 return FALSE;
9205 }
9206
9207 if (info->emitrelocations)
9208 {
9209 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9210 if (r == NULL)
9211 return FALSE;
9212 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9213 if (bfd_big_endian (info->output_bfd))
9214 r[0].r_offset += 2;
9215 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9216 r[0].r_offset += 4;
9217 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9218 r[0].r_addend = dest;
9219 if (PPC_HA (off) != 0)
9220 {
9221 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9222 r[1].r_offset = r[0].r_offset + 4;
9223 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9224 r[1].r_addend = r[0].r_addend;
9225 }
9226 }
9227
9228 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9229 {
9230 if (PPC_HA (off) != 0)
9231 {
9232 size = 16;
9233 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9234 loc += 4;
9235 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9236 }
9237 else
9238 {
9239 size = 12;
9240 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9241 }
9242 }
9243 else
9244 {
9245 bfd_vma r2off;
9246
9247 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9248 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9249 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9250 loc += 4;
9251 size = 20;
9252 if (PPC_HA (off) != 0)
9253 {
9254 size += 4;
9255 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9256 loc += 4;
9257 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9258 loc += 4;
9259 }
9260 else
9261 {
9262 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9263 loc += 4;
9264 }
9265
9266 if (PPC_HA (r2off) != 0)
9267 {
9268 size += 4;
9269 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9270 loc += 4;
9271 }
9272 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9273 }
9274 loc += 4;
9275 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9276 loc += 4;
9277 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9278 break;
9279
9280 case ppc_stub_plt_call:
9281 if (stub_entry->h != NULL
9282 && stub_entry->h->is_func_descriptor
9283 && stub_entry->h->oh != NULL)
9284 {
9285 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9286
9287 /* If the old-ABI "dot-symbol" is undefined make it weak so
9288 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9289 FIXME: We used to define the symbol on one of the call
9290 stubs instead, which is why we test symbol section id
9291 against htab->top_id in various places. Likely all
9292 these checks could now disappear. */
9293 if (fh->elf.root.type == bfd_link_hash_undefined)
9294 fh->elf.root.type = bfd_link_hash_undefweak;
9295 }
9296
9297 /* Now build the stub. */
9298 dest = stub_entry->plt_ent->plt.offset & ~1;
9299 if (dest >= (bfd_vma) -2)
9300 abort ();
9301
9302 plt = htab->plt;
9303 if (!htab->elf.dynamic_sections_created
9304 || stub_entry->h == NULL
9305 || stub_entry->h->elf.dynindx == -1)
9306 plt = htab->iplt;
9307
9308 dest += plt->output_offset + plt->output_section->vma;
9309
9310 if (stub_entry->h == NULL
9311 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9312 {
9313 Elf_Internal_Rela rela;
9314 bfd_byte *rl;
9315
9316 rela.r_offset = dest;
9317 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9318 rela.r_addend = (stub_entry->target_value
9319 + stub_entry->target_section->output_offset
9320 + stub_entry->target_section->output_section->vma);
9321
9322 rl = (htab->reliplt->contents
9323 + (htab->reliplt->reloc_count++
9324 * sizeof (Elf64_External_Rela)));
9325 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9326 stub_entry->plt_ent->plt.offset |= 1;
9327 }
9328
9329 off = (dest
9330 - elf_gp (plt->output_section->owner)
9331 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9332
9333 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9334 {
9335 (*_bfd_error_handler)
9336 (_("linkage table error against `%s'"),
9337 stub_entry->h != NULL
9338 ? stub_entry->h->elf.root.root.string
9339 : "<local sym>");
9340 bfd_set_error (bfd_error_bad_value);
9341 htab->stub_error = TRUE;
9342 return FALSE;
9343 }
9344
9345 r = NULL;
9346 if (info->emitrelocations)
9347 {
9348 r = get_relocs (stub_entry->stub_sec,
9349 (2 + (PPC_HA (off) != 0)
9350 + (PPC_HA (off + 16) == PPC_HA (off))));
9351 if (r == NULL)
9352 return FALSE;
9353 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9354 if (bfd_big_endian (info->output_bfd))
9355 r[0].r_offset += 2;
9356 r[0].r_addend = dest;
9357 }
9358 if (stub_entry->h != NULL
9359 && (stub_entry->h == htab->tls_get_addr_fd
9360 || stub_entry->h == htab->tls_get_addr)
9361 && !htab->no_tls_get_addr_opt)
9362 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9363 else
9364 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9365 size = p - loc;
9366 break;
9367
9368 default:
9369 BFD_FAIL ();
9370 return FALSE;
9371 }
9372
9373 stub_entry->stub_sec->size += size;
9374
9375 if (htab->emit_stub_syms)
9376 {
9377 struct elf_link_hash_entry *h;
9378 size_t len1, len2;
9379 char *name;
9380 const char *const stub_str[] = { "long_branch",
9381 "long_branch_r2off",
9382 "plt_branch",
9383 "plt_branch_r2off",
9384 "plt_call" };
9385
9386 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9387 len2 = strlen (stub_entry->root.string);
9388 name = bfd_malloc (len1 + len2 + 2);
9389 if (name == NULL)
9390 return FALSE;
9391 memcpy (name, stub_entry->root.string, 9);
9392 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9393 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9394 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9395 if (h == NULL)
9396 return FALSE;
9397 if (h->root.type == bfd_link_hash_new)
9398 {
9399 h->root.type = bfd_link_hash_defined;
9400 h->root.u.def.section = stub_entry->stub_sec;
9401 h->root.u.def.value = stub_entry->stub_offset;
9402 h->ref_regular = 1;
9403 h->def_regular = 1;
9404 h->ref_regular_nonweak = 1;
9405 h->forced_local = 1;
9406 h->non_elf = 0;
9407 }
9408 }
9409
9410 return TRUE;
9411 }
9412
9413 /* As above, but don't actually build the stub. Just bump offset so
9414 we know stub section sizes, and select plt_branch stubs where
9415 long_branch stubs won't do. */
9416
9417 static bfd_boolean
9418 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9419 {
9420 struct ppc_stub_hash_entry *stub_entry;
9421 struct bfd_link_info *info;
9422 struct ppc_link_hash_table *htab;
9423 bfd_vma off;
9424 int size;
9425
9426 /* Massage our args to the form they really have. */
9427 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9428 info = in_arg;
9429
9430 htab = ppc_hash_table (info);
9431
9432 if (stub_entry->stub_type == ppc_stub_plt_call)
9433 {
9434 asection *plt;
9435 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9436 if (off >= (bfd_vma) -2)
9437 abort ();
9438 plt = htab->plt;
9439 if (!htab->elf.dynamic_sections_created
9440 || stub_entry->h == NULL
9441 || stub_entry->h->elf.dynindx == -1)
9442 plt = htab->iplt;
9443 off += (plt->output_offset
9444 + plt->output_section->vma
9445 - elf_gp (plt->output_section->owner)
9446 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9447
9448 size = PLT_CALL_STUB_SIZE;
9449 if (PPC_HA (off) == 0)
9450 size -= 4;
9451 if (PPC_HA (off + 16) != PPC_HA (off))
9452 size += 4;
9453 if (stub_entry->h != NULL
9454 && (stub_entry->h == htab->tls_get_addr_fd
9455 || stub_entry->h == htab->tls_get_addr)
9456 && !htab->no_tls_get_addr_opt)
9457 size += 13 * 4;
9458 if (info->emitrelocations)
9459 {
9460 stub_entry->stub_sec->reloc_count
9461 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9462 stub_entry->stub_sec->flags |= SEC_RELOC;
9463 }
9464 }
9465 else
9466 {
9467 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9468 variants. */
9469 bfd_vma r2off = 0;
9470
9471 off = (stub_entry->target_value
9472 + stub_entry->target_section->output_offset
9473 + stub_entry->target_section->output_section->vma);
9474 off -= (stub_entry->stub_sec->size
9475 + stub_entry->stub_sec->output_offset
9476 + stub_entry->stub_sec->output_section->vma);
9477
9478 /* Reset the stub type from the plt variant in case we now
9479 can reach with a shorter stub. */
9480 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9481 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9482
9483 size = 4;
9484 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9485 {
9486 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9487 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9488 size = 12;
9489 if (PPC_HA (r2off) != 0)
9490 size = 16;
9491 off -= size - 4;
9492 }
9493
9494 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9495 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9496 {
9497 struct ppc_branch_hash_entry *br_entry;
9498
9499 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9500 stub_entry->root.string + 9,
9501 TRUE, FALSE);
9502 if (br_entry == NULL)
9503 {
9504 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9505 stub_entry->root.string);
9506 htab->stub_error = TRUE;
9507 return FALSE;
9508 }
9509
9510 if (br_entry->iter != htab->stub_iteration)
9511 {
9512 br_entry->iter = htab->stub_iteration;
9513 br_entry->offset = htab->brlt->size;
9514 htab->brlt->size += 8;
9515
9516 if (htab->relbrlt != NULL)
9517 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9518 else if (info->emitrelocations)
9519 {
9520 htab->brlt->reloc_count += 1;
9521 htab->brlt->flags |= SEC_RELOC;
9522 }
9523 }
9524
9525 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9526 off = (br_entry->offset
9527 + htab->brlt->output_offset
9528 + htab->brlt->output_section->vma
9529 - elf_gp (htab->brlt->output_section->owner)
9530 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9531
9532 if (info->emitrelocations)
9533 {
9534 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9535 stub_entry->stub_sec->flags |= SEC_RELOC;
9536 }
9537
9538 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9539 {
9540 size = 12;
9541 if (PPC_HA (off) != 0)
9542 size = 16;
9543 }
9544 else
9545 {
9546 size = 20;
9547 if (PPC_HA (off) != 0)
9548 size += 4;
9549
9550 if (PPC_HA (r2off) != 0)
9551 size += 4;
9552 }
9553 }
9554 else if (info->emitrelocations)
9555 {
9556 stub_entry->stub_sec->reloc_count += 1;
9557 stub_entry->stub_sec->flags |= SEC_RELOC;
9558 }
9559 }
9560
9561 stub_entry->stub_sec->size += size;
9562 return TRUE;
9563 }
9564
9565 /* Set up various things so that we can make a list of input sections
9566 for each output section included in the link. Returns -1 on error,
9567 0 when no stubs will be needed, and 1 on success. */
9568
9569 int
9570 ppc64_elf_setup_section_lists (bfd *output_bfd,
9571 struct bfd_link_info *info,
9572 int no_multi_toc)
9573 {
9574 bfd *input_bfd;
9575 int top_id, top_index, id;
9576 asection *section;
9577 asection **input_list;
9578 bfd_size_type amt;
9579 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9580
9581 htab->no_multi_toc = no_multi_toc;
9582
9583 if (htab->brlt == NULL)
9584 return 0;
9585
9586 /* Find the top input section id. */
9587 for (input_bfd = info->input_bfds, top_id = 3;
9588 input_bfd != NULL;
9589 input_bfd = input_bfd->link_next)
9590 {
9591 for (section = input_bfd->sections;
9592 section != NULL;
9593 section = section->next)
9594 {
9595 if (top_id < section->id)
9596 top_id = section->id;
9597 }
9598 }
9599
9600 htab->top_id = top_id;
9601 amt = sizeof (struct map_stub) * (top_id + 1);
9602 htab->stub_group = bfd_zmalloc (amt);
9603 if (htab->stub_group == NULL)
9604 return -1;
9605
9606 /* Set toc_off for com, und, abs and ind sections. */
9607 for (id = 0; id < 3; id++)
9608 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9609
9610 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
9611
9612 /* We can't use output_bfd->section_count here to find the top output
9613 section index as some sections may have been removed, and
9614 strip_excluded_output_sections doesn't renumber the indices. */
9615 for (section = output_bfd->sections, top_index = 0;
9616 section != NULL;
9617 section = section->next)
9618 {
9619 if (top_index < section->index)
9620 top_index = section->index;
9621 }
9622
9623 htab->top_index = top_index;
9624 amt = sizeof (asection *) * (top_index + 1);
9625 input_list = bfd_zmalloc (amt);
9626 htab->input_list = input_list;
9627 if (input_list == NULL)
9628 return -1;
9629
9630 return 1;
9631 }
9632
9633 /* The linker repeatedly calls this function for each TOC input section
9634 and linker generated GOT section. Group input bfds such that the toc
9635 within a group is less than 64k in size. Will break with cute linker
9636 scripts that play games with dot in the output toc section. */
9637
9638 void
9639 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
9640 {
9641 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9642
9643 if (!htab->no_multi_toc)
9644 {
9645 bfd_vma addr = isec->output_offset + isec->output_section->vma;
9646 bfd_vma off = addr - htab->toc_curr;
9647
9648 if (off + isec->size > 0x10000)
9649 htab->toc_curr = addr;
9650
9651 elf_gp (isec->owner) = (htab->toc_curr
9652 - elf_gp (isec->output_section->owner)
9653 + TOC_BASE_OFF);
9654 }
9655 }
9656
9657 /* Called after the last call to the above function. */
9658
9659 void
9660 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
9661 {
9662 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9663
9664 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
9665
9666 /* toc_curr tracks the TOC offset used for code sections below in
9667 ppc64_elf_next_input_section. Start off at 0x8000. */
9668 htab->toc_curr = TOC_BASE_OFF;
9669 }
9670
9671 /* No toc references were found in ISEC. If the code in ISEC makes no
9672 calls, then there's no need to use toc adjusting stubs when branching
9673 into ISEC. Actually, indirect calls from ISEC are OK as they will
9674 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
9675 needed, and 2 if a cyclical call-graph was found but no other reason
9676 for a stub was detected. If called from the top level, a return of
9677 2 means the same as a return of 0. */
9678
9679 static int
9680 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
9681 {
9682 Elf_Internal_Rela *relstart, *rel;
9683 Elf_Internal_Sym *local_syms;
9684 int ret;
9685 struct ppc_link_hash_table *htab;
9686
9687 /* We know none of our code bearing sections will need toc stubs. */
9688 if ((isec->flags & SEC_LINKER_CREATED) != 0)
9689 return 0;
9690
9691 if (isec->size == 0)
9692 return 0;
9693
9694 if (isec->output_section == NULL)
9695 return 0;
9696
9697 if (isec->reloc_count == 0)
9698 return 0;
9699
9700 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
9701 info->keep_memory);
9702 if (relstart == NULL)
9703 return -1;
9704
9705 /* Look for branches to outside of this section. */
9706 local_syms = NULL;
9707 ret = 0;
9708 htab = ppc_hash_table (info);
9709 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
9710 {
9711 enum elf_ppc64_reloc_type r_type;
9712 unsigned long r_symndx;
9713 struct elf_link_hash_entry *h;
9714 struct ppc_link_hash_entry *eh;
9715 Elf_Internal_Sym *sym;
9716 asection *sym_sec;
9717 struct _opd_sec_data *opd;
9718 bfd_vma sym_value;
9719 bfd_vma dest;
9720
9721 r_type = ELF64_R_TYPE (rel->r_info);
9722 if (r_type != R_PPC64_REL24
9723 && r_type != R_PPC64_REL14
9724 && r_type != R_PPC64_REL14_BRTAKEN
9725 && r_type != R_PPC64_REL14_BRNTAKEN)
9726 continue;
9727
9728 r_symndx = ELF64_R_SYM (rel->r_info);
9729 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
9730 isec->owner))
9731 {
9732 ret = -1;
9733 break;
9734 }
9735
9736 /* Calls to dynamic lib functions go through a plt call stub
9737 that uses r2. */
9738 eh = (struct ppc_link_hash_entry *) h;
9739 if (eh != NULL
9740 && (eh->elf.plt.plist != NULL
9741 || (eh->oh != NULL
9742 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
9743 {
9744 ret = 1;
9745 break;
9746 }
9747
9748 if (sym_sec == NULL)
9749 /* Ignore other undefined symbols. */
9750 continue;
9751
9752 /* Assume branches to other sections not included in the link need
9753 stubs too, to cover -R and absolute syms. */
9754 if (sym_sec->output_section == NULL)
9755 {
9756 ret = 1;
9757 break;
9758 }
9759
9760 if (h == NULL)
9761 sym_value = sym->st_value;
9762 else
9763 {
9764 if (h->root.type != bfd_link_hash_defined
9765 && h->root.type != bfd_link_hash_defweak)
9766 abort ();
9767 sym_value = h->root.u.def.value;
9768 }
9769 sym_value += rel->r_addend;
9770
9771 /* If this branch reloc uses an opd sym, find the code section. */
9772 opd = get_opd_info (sym_sec);
9773 if (opd != NULL)
9774 {
9775 if (h == NULL && opd->adjust != NULL)
9776 {
9777 long adjust;
9778
9779 adjust = opd->adjust[sym->st_value / 8];
9780 if (adjust == -1)
9781 /* Assume deleted functions won't ever be called. */
9782 continue;
9783 sym_value += adjust;
9784 }
9785
9786 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
9787 if (dest == (bfd_vma) -1)
9788 continue;
9789 }
9790 else
9791 dest = (sym_value
9792 + sym_sec->output_offset
9793 + sym_sec->output_section->vma);
9794
9795 /* Ignore branch to self. */
9796 if (sym_sec == isec)
9797 continue;
9798
9799 /* If the called function uses the toc, we need a stub. */
9800 if (sym_sec->has_toc_reloc
9801 || sym_sec->makes_toc_func_call)
9802 {
9803 ret = 1;
9804 break;
9805 }
9806
9807 /* Assume any branch that needs a long branch stub might in fact
9808 need a plt_branch stub. A plt_branch stub uses r2. */
9809 else if (dest - (isec->output_offset
9810 + isec->output_section->vma
9811 + rel->r_offset) + (1 << 25) >= (2 << 25))
9812 {
9813 ret = 1;
9814 break;
9815 }
9816
9817 /* If calling back to a section in the process of being tested, we
9818 can't say for sure that no toc adjusting stubs are needed, so
9819 don't return zero. */
9820 else if (sym_sec->call_check_in_progress)
9821 ret = 2;
9822
9823 /* Branches to another section that itself doesn't have any TOC
9824 references are OK. Recursively call ourselves to check. */
9825 else if (sym_sec->id <= htab->top_id
9826 && htab->stub_group[sym_sec->id].toc_off == 0)
9827 {
9828 int recur;
9829
9830 /* Mark current section as indeterminate, so that other
9831 sections that call back to current won't be marked as
9832 known. */
9833 isec->call_check_in_progress = 1;
9834 recur = toc_adjusting_stub_needed (info, sym_sec);
9835 isec->call_check_in_progress = 0;
9836
9837 if (recur < 0)
9838 {
9839 /* An error. Exit. */
9840 ret = -1;
9841 break;
9842 }
9843 else if (recur <= 1)
9844 {
9845 /* Known result. Mark as checked and set section flag. */
9846 htab->stub_group[sym_sec->id].toc_off = 1;
9847 if (recur != 0)
9848 {
9849 sym_sec->makes_toc_func_call = 1;
9850 ret = 1;
9851 break;
9852 }
9853 }
9854 else
9855 {
9856 /* Unknown result. Continue checking. */
9857 ret = 2;
9858 }
9859 }
9860 }
9861
9862 if (local_syms != NULL
9863 && (elf_symtab_hdr (isec->owner).contents != (unsigned char *) local_syms))
9864 free (local_syms);
9865 if (elf_section_data (isec)->relocs != relstart)
9866 free (relstart);
9867
9868 return ret;
9869 }
9870
9871 /* The linker repeatedly calls this function for each input section,
9872 in the order that input sections are linked into output sections.
9873 Build lists of input sections to determine groupings between which
9874 we may insert linker stubs. */
9875
9876 bfd_boolean
9877 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9878 {
9879 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9880
9881 if ((isec->output_section->flags & SEC_CODE) != 0
9882 && isec->output_section->index <= htab->top_index)
9883 {
9884 asection **list = htab->input_list + isec->output_section->index;
9885 /* Steal the link_sec pointer for our list. */
9886 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9887 /* This happens to make the list in reverse order,
9888 which is what we want. */
9889 PREV_SEC (isec) = *list;
9890 *list = isec;
9891 }
9892
9893 if (htab->multi_toc_needed)
9894 {
9895 /* If a code section has a function that uses the TOC then we need
9896 to use the right TOC (obviously). Also, make sure that .opd gets
9897 the correct TOC value for R_PPC64_TOC relocs that don't have or
9898 can't find their function symbol (shouldn't ever happen now).
9899 Also specially treat .fixup for the linux kernel. .fixup
9900 contains branches, but only back to the function that hit an
9901 exception. */
9902 if (isec->has_toc_reloc
9903 || (isec->flags & SEC_CODE) == 0
9904 || strcmp (isec->name, ".fixup") == 0)
9905 {
9906 if (elf_gp (isec->owner) != 0)
9907 htab->toc_curr = elf_gp (isec->owner);
9908 }
9909 else if (htab->stub_group[isec->id].toc_off == 0)
9910 {
9911 int ret = toc_adjusting_stub_needed (info, isec);
9912 if (ret < 0)
9913 return FALSE;
9914 else
9915 isec->makes_toc_func_call = ret & 1;
9916 }
9917 }
9918
9919 /* Functions that don't use the TOC can belong in any TOC group.
9920 Use the last TOC base. This happens to make _init and _fini
9921 pasting work. */
9922 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9923 return TRUE;
9924 }
9925
9926 /* See whether we can group stub sections together. Grouping stub
9927 sections may result in fewer stubs. More importantly, we need to
9928 put all .init* and .fini* stubs at the beginning of the .init or
9929 .fini output sections respectively, because glibc splits the
9930 _init and _fini functions into multiple parts. Putting a stub in
9931 the middle of a function is not a good idea. */
9932
9933 static void
9934 group_sections (struct ppc_link_hash_table *htab,
9935 bfd_size_type stub_group_size,
9936 bfd_boolean stubs_always_before_branch)
9937 {
9938 asection **list;
9939 bfd_size_type stub14_group_size;
9940 bfd_boolean suppress_size_errors;
9941
9942 suppress_size_errors = FALSE;
9943 stub14_group_size = stub_group_size;
9944 if (stub_group_size == 1)
9945 {
9946 /* Default values. */
9947 if (stubs_always_before_branch)
9948 {
9949 stub_group_size = 0x1e00000;
9950 stub14_group_size = 0x7800;
9951 }
9952 else
9953 {
9954 stub_group_size = 0x1c00000;
9955 stub14_group_size = 0x7000;
9956 }
9957 suppress_size_errors = TRUE;
9958 }
9959
9960 list = htab->input_list + htab->top_index;
9961 do
9962 {
9963 asection *tail = *list;
9964 while (tail != NULL)
9965 {
9966 asection *curr;
9967 asection *prev;
9968 bfd_size_type total;
9969 bfd_boolean big_sec;
9970 bfd_vma curr_toc;
9971
9972 curr = tail;
9973 total = tail->size;
9974 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9975 ? stub14_group_size : stub_group_size);
9976 if (big_sec && !suppress_size_errors)
9977 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9978 tail->owner, tail);
9979 curr_toc = htab->stub_group[tail->id].toc_off;
9980
9981 while ((prev = PREV_SEC (curr)) != NULL
9982 && ((total += curr->output_offset - prev->output_offset)
9983 < (ppc64_elf_section_data (prev)->has_14bit_branch
9984 ? stub14_group_size : stub_group_size))
9985 && htab->stub_group[prev->id].toc_off == curr_toc)
9986 curr = prev;
9987
9988 /* OK, the size from the start of CURR to the end is less
9989 than stub_group_size and thus can be handled by one stub
9990 section. (or the tail section is itself larger than
9991 stub_group_size, in which case we may be toast.) We
9992 should really be keeping track of the total size of stubs
9993 added here, as stubs contribute to the final output
9994 section size. That's a little tricky, and this way will
9995 only break if stubs added make the total size more than
9996 2^25, ie. for the default stub_group_size, if stubs total
9997 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9998 do
9999 {
10000 prev = PREV_SEC (tail);
10001 /* Set up this stub group. */
10002 htab->stub_group[tail->id].link_sec = curr;
10003 }
10004 while (tail != curr && (tail = prev) != NULL);
10005
10006 /* But wait, there's more! Input sections up to stub_group_size
10007 bytes before the stub section can be handled by it too.
10008 Don't do this if we have a really large section after the
10009 stubs, as adding more stubs increases the chance that
10010 branches may not reach into the stub section. */
10011 if (!stubs_always_before_branch && !big_sec)
10012 {
10013 total = 0;
10014 while (prev != NULL
10015 && ((total += tail->output_offset - prev->output_offset)
10016 < (ppc64_elf_section_data (prev)->has_14bit_branch
10017 ? stub14_group_size : stub_group_size))
10018 && htab->stub_group[prev->id].toc_off == curr_toc)
10019 {
10020 tail = prev;
10021 prev = PREV_SEC (tail);
10022 htab->stub_group[tail->id].link_sec = curr;
10023 }
10024 }
10025 tail = prev;
10026 }
10027 }
10028 while (list-- != htab->input_list);
10029 free (htab->input_list);
10030 #undef PREV_SEC
10031 }
10032
10033 /* Determine and set the size of the stub section for a final link.
10034
10035 The basic idea here is to examine all the relocations looking for
10036 PC-relative calls to a target that is unreachable with a "bl"
10037 instruction. */
10038
10039 bfd_boolean
10040 ppc64_elf_size_stubs (bfd *output_bfd,
10041 struct bfd_link_info *info,
10042 bfd_signed_vma group_size,
10043 asection *(*add_stub_section) (const char *, asection *),
10044 void (*layout_sections_again) (void))
10045 {
10046 bfd_size_type stub_group_size;
10047 bfd_boolean stubs_always_before_branch;
10048 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10049
10050 /* Stash our params away. */
10051 htab->add_stub_section = add_stub_section;
10052 htab->layout_sections_again = layout_sections_again;
10053 stubs_always_before_branch = group_size < 0;
10054 if (group_size < 0)
10055 stub_group_size = -group_size;
10056 else
10057 stub_group_size = group_size;
10058
10059 group_sections (htab, stub_group_size, stubs_always_before_branch);
10060
10061 while (1)
10062 {
10063 bfd *input_bfd;
10064 unsigned int bfd_indx;
10065 asection *stub_sec;
10066
10067 htab->stub_iteration += 1;
10068
10069 for (input_bfd = info->input_bfds, bfd_indx = 0;
10070 input_bfd != NULL;
10071 input_bfd = input_bfd->link_next, bfd_indx++)
10072 {
10073 Elf_Internal_Shdr *symtab_hdr;
10074 asection *section;
10075 Elf_Internal_Sym *local_syms = NULL;
10076
10077 if (!is_ppc64_elf (input_bfd))
10078 continue;
10079
10080 /* We'll need the symbol table in a second. */
10081 symtab_hdr = &elf_symtab_hdr (input_bfd);
10082 if (symtab_hdr->sh_info == 0)
10083 continue;
10084
10085 /* Walk over each section attached to the input bfd. */
10086 for (section = input_bfd->sections;
10087 section != NULL;
10088 section = section->next)
10089 {
10090 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10091
10092 /* If there aren't any relocs, then there's nothing more
10093 to do. */
10094 if ((section->flags & SEC_RELOC) == 0
10095 || (section->flags & SEC_ALLOC) == 0
10096 || (section->flags & SEC_LOAD) == 0
10097 || (section->flags & SEC_CODE) == 0
10098 || section->reloc_count == 0)
10099 continue;
10100
10101 /* If this section is a link-once section that will be
10102 discarded, then don't create any stubs. */
10103 if (section->output_section == NULL
10104 || section->output_section->owner != output_bfd)
10105 continue;
10106
10107 /* Get the relocs. */
10108 internal_relocs
10109 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10110 info->keep_memory);
10111 if (internal_relocs == NULL)
10112 goto error_ret_free_local;
10113
10114 /* Now examine each relocation. */
10115 irela = internal_relocs;
10116 irelaend = irela + section->reloc_count;
10117 for (; irela < irelaend; irela++)
10118 {
10119 enum elf_ppc64_reloc_type r_type;
10120 unsigned int r_indx;
10121 enum ppc_stub_type stub_type;
10122 struct ppc_stub_hash_entry *stub_entry;
10123 asection *sym_sec, *code_sec;
10124 bfd_vma sym_value, code_value;
10125 bfd_vma destination;
10126 bfd_boolean ok_dest;
10127 struct ppc_link_hash_entry *hash;
10128 struct ppc_link_hash_entry *fdh;
10129 struct elf_link_hash_entry *h;
10130 Elf_Internal_Sym *sym;
10131 char *stub_name;
10132 const asection *id_sec;
10133 struct _opd_sec_data *opd;
10134 struct plt_entry *plt_ent;
10135
10136 r_type = ELF64_R_TYPE (irela->r_info);
10137 r_indx = ELF64_R_SYM (irela->r_info);
10138
10139 if (r_type >= R_PPC64_max)
10140 {
10141 bfd_set_error (bfd_error_bad_value);
10142 goto error_ret_free_internal;
10143 }
10144
10145 /* Only look for stubs on branch instructions. */
10146 if (r_type != R_PPC64_REL24
10147 && r_type != R_PPC64_REL14
10148 && r_type != R_PPC64_REL14_BRTAKEN
10149 && r_type != R_PPC64_REL14_BRNTAKEN)
10150 continue;
10151
10152 /* Now determine the call target, its name, value,
10153 section. */
10154 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10155 r_indx, input_bfd))
10156 goto error_ret_free_internal;
10157 hash = (struct ppc_link_hash_entry *) h;
10158
10159 ok_dest = FALSE;
10160 fdh = NULL;
10161 sym_value = 0;
10162 if (hash == NULL)
10163 {
10164 sym_value = sym->st_value;
10165 ok_dest = TRUE;
10166 }
10167 else if (hash->elf.root.type == bfd_link_hash_defined
10168 || hash->elf.root.type == bfd_link_hash_defweak)
10169 {
10170 sym_value = hash->elf.root.u.def.value;
10171 if (sym_sec->output_section != NULL)
10172 ok_dest = TRUE;
10173 }
10174 else if (hash->elf.root.type == bfd_link_hash_undefweak
10175 || hash->elf.root.type == bfd_link_hash_undefined)
10176 {
10177 /* Recognise an old ABI func code entry sym, and
10178 use the func descriptor sym instead if it is
10179 defined. */
10180 if (hash->elf.root.root.string[0] == '.'
10181 && (fdh = lookup_fdh (hash, htab)) != NULL)
10182 {
10183 if (fdh->elf.root.type == bfd_link_hash_defined
10184 || fdh->elf.root.type == bfd_link_hash_defweak)
10185 {
10186 sym_sec = fdh->elf.root.u.def.section;
10187 sym_value = fdh->elf.root.u.def.value;
10188 if (sym_sec->output_section != NULL)
10189 ok_dest = TRUE;
10190 }
10191 else
10192 fdh = NULL;
10193 }
10194 }
10195 else
10196 {
10197 bfd_set_error (bfd_error_bad_value);
10198 goto error_ret_free_internal;
10199 }
10200
10201 destination = 0;
10202 if (ok_dest)
10203 {
10204 sym_value += irela->r_addend;
10205 destination = (sym_value
10206 + sym_sec->output_offset
10207 + sym_sec->output_section->vma);
10208 }
10209
10210 code_sec = sym_sec;
10211 code_value = sym_value;
10212 opd = get_opd_info (sym_sec);
10213 if (opd != NULL)
10214 {
10215 bfd_vma dest;
10216
10217 if (hash == NULL && opd->adjust != NULL)
10218 {
10219 long adjust = opd->adjust[sym_value / 8];
10220 if (adjust == -1)
10221 continue;
10222 code_value += adjust;
10223 sym_value += adjust;
10224 }
10225 dest = opd_entry_value (sym_sec, sym_value,
10226 &code_sec, &code_value);
10227 if (dest != (bfd_vma) -1)
10228 {
10229 destination = dest;
10230 if (fdh != NULL)
10231 {
10232 /* Fixup old ABI sym to point at code
10233 entry. */
10234 hash->elf.root.type = bfd_link_hash_defweak;
10235 hash->elf.root.u.def.section = code_sec;
10236 hash->elf.root.u.def.value = code_value;
10237 }
10238 }
10239 }
10240
10241 /* Determine what (if any) linker stub is needed. */
10242 plt_ent = NULL;
10243 stub_type = ppc_type_of_stub (section, irela, &hash,
10244 &plt_ent, destination);
10245
10246 if (stub_type != ppc_stub_plt_call)
10247 {
10248 /* Check whether we need a TOC adjusting stub.
10249 Since the linker pastes together pieces from
10250 different object files when creating the
10251 _init and _fini functions, it may be that a
10252 call to what looks like a local sym is in
10253 fact a call needing a TOC adjustment. */
10254 if (code_sec != NULL
10255 && code_sec->output_section != NULL
10256 && (htab->stub_group[code_sec->id].toc_off
10257 != htab->stub_group[section->id].toc_off)
10258 && (code_sec->has_toc_reloc
10259 || code_sec->makes_toc_func_call))
10260 stub_type = ppc_stub_long_branch_r2off;
10261 }
10262
10263 if (stub_type == ppc_stub_none)
10264 continue;
10265
10266 /* __tls_get_addr calls might be eliminated. */
10267 if (stub_type != ppc_stub_plt_call
10268 && hash != NULL
10269 && (hash == htab->tls_get_addr
10270 || hash == htab->tls_get_addr_fd)
10271 && section->has_tls_reloc
10272 && irela != internal_relocs)
10273 {
10274 /* Get tls info. */
10275 char *tls_mask;
10276
10277 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
10278 irela - 1, input_bfd))
10279 goto error_ret_free_internal;
10280 if (*tls_mask != 0)
10281 continue;
10282 }
10283
10284 /* Support for grouping stub sections. */
10285 id_sec = htab->stub_group[section->id].link_sec;
10286
10287 /* Get the name of this stub. */
10288 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
10289 if (!stub_name)
10290 goto error_ret_free_internal;
10291
10292 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
10293 stub_name, FALSE, FALSE);
10294 if (stub_entry != NULL)
10295 {
10296 /* The proper stub has already been created. */
10297 free (stub_name);
10298 continue;
10299 }
10300
10301 stub_entry = ppc_add_stub (stub_name, section, htab);
10302 if (stub_entry == NULL)
10303 {
10304 free (stub_name);
10305 error_ret_free_internal:
10306 if (elf_section_data (section)->relocs == NULL)
10307 free (internal_relocs);
10308 error_ret_free_local:
10309 if (local_syms != NULL
10310 && (symtab_hdr->contents
10311 != (unsigned char *) local_syms))
10312 free (local_syms);
10313 return FALSE;
10314 }
10315
10316 stub_entry->stub_type = stub_type;
10317 if (stub_type != ppc_stub_plt_call)
10318 {
10319 stub_entry->target_value = code_value;
10320 stub_entry->target_section = code_sec;
10321 }
10322 else
10323 {
10324 stub_entry->target_value = sym_value;
10325 stub_entry->target_section = sym_sec;
10326 }
10327 stub_entry->h = hash;
10328 stub_entry->plt_ent = plt_ent;
10329 stub_entry->addend = irela->r_addend;
10330
10331 if (stub_entry->h != NULL)
10332 htab->stub_globals += 1;
10333 }
10334
10335 /* We're done with the internal relocs, free them. */
10336 if (elf_section_data (section)->relocs != internal_relocs)
10337 free (internal_relocs);
10338 }
10339
10340 if (local_syms != NULL
10341 && symtab_hdr->contents != (unsigned char *) local_syms)
10342 {
10343 if (!info->keep_memory)
10344 free (local_syms);
10345 else
10346 symtab_hdr->contents = (unsigned char *) local_syms;
10347 }
10348 }
10349
10350 /* We may have added some stubs. Find out the new size of the
10351 stub sections. */
10352 for (stub_sec = htab->stub_bfd->sections;
10353 stub_sec != NULL;
10354 stub_sec = stub_sec->next)
10355 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10356 {
10357 stub_sec->rawsize = stub_sec->size;
10358 stub_sec->size = 0;
10359 stub_sec->reloc_count = 0;
10360 stub_sec->flags &= ~SEC_RELOC;
10361 }
10362
10363 htab->brlt->size = 0;
10364 htab->brlt->reloc_count = 0;
10365 htab->brlt->flags &= ~SEC_RELOC;
10366 if (htab->relbrlt != NULL)
10367 htab->relbrlt->size = 0;
10368
10369 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
10370
10371 if (info->emitrelocations
10372 && htab->glink != NULL && htab->glink->size != 0)
10373 {
10374 htab->glink->reloc_count = 1;
10375 htab->glink->flags |= SEC_RELOC;
10376 }
10377
10378 for (stub_sec = htab->stub_bfd->sections;
10379 stub_sec != NULL;
10380 stub_sec = stub_sec->next)
10381 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10382 && stub_sec->rawsize != stub_sec->size)
10383 break;
10384
10385 /* Exit from this loop when no stubs have been added, and no stubs
10386 have changed size. */
10387 if (stub_sec == NULL)
10388 break;
10389
10390 /* Ask the linker to do its stuff. */
10391 (*htab->layout_sections_again) ();
10392 }
10393
10394 /* It would be nice to strip htab->brlt from the output if the
10395 section is empty, but it's too late. If we strip sections here,
10396 the dynamic symbol table is corrupted since the section symbol
10397 for the stripped section isn't written. */
10398
10399 return TRUE;
10400 }
10401
10402 /* Called after we have determined section placement. If sections
10403 move, we'll be called again. Provide a value for TOCstart. */
10404
10405 bfd_vma
10406 ppc64_elf_toc (bfd *obfd)
10407 {
10408 asection *s;
10409 bfd_vma TOCstart;
10410
10411 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
10412 order. The TOC starts where the first of these sections starts. */
10413 s = bfd_get_section_by_name (obfd, ".got");
10414 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10415 s = bfd_get_section_by_name (obfd, ".toc");
10416 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10417 s = bfd_get_section_by_name (obfd, ".tocbss");
10418 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10419 s = bfd_get_section_by_name (obfd, ".plt");
10420 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10421 {
10422 /* This may happen for
10423 o references to TOC base (SYM@toc / TOC[tc0]) without a
10424 .toc directive
10425 o bad linker script
10426 o --gc-sections and empty TOC sections
10427
10428 FIXME: Warn user? */
10429
10430 /* Look for a likely section. We probably won't even be
10431 using TOCstart. */
10432 for (s = obfd->sections; s != NULL; s = s->next)
10433 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
10434 | SEC_EXCLUDE))
10435 == (SEC_ALLOC | SEC_SMALL_DATA))
10436 break;
10437 if (s == NULL)
10438 for (s = obfd->sections; s != NULL; s = s->next)
10439 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
10440 == (SEC_ALLOC | SEC_SMALL_DATA))
10441 break;
10442 if (s == NULL)
10443 for (s = obfd->sections; s != NULL; s = s->next)
10444 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
10445 == SEC_ALLOC)
10446 break;
10447 if (s == NULL)
10448 for (s = obfd->sections; s != NULL; s = s->next)
10449 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
10450 break;
10451 }
10452
10453 TOCstart = 0;
10454 if (s != NULL)
10455 TOCstart = s->output_section->vma + s->output_offset;
10456
10457 return TOCstart;
10458 }
10459
10460 /* Build all the stubs associated with the current output file.
10461 The stubs are kept in a hash table attached to the main linker
10462 hash table. This function is called via gldelf64ppc_finish. */
10463
10464 bfd_boolean
10465 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
10466 struct bfd_link_info *info,
10467 char **stats)
10468 {
10469 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10470 asection *stub_sec;
10471 bfd_byte *p;
10472 int stub_sec_count = 0;
10473
10474 htab->emit_stub_syms = emit_stub_syms;
10475
10476 /* Allocate memory to hold the linker stubs. */
10477 for (stub_sec = htab->stub_bfd->sections;
10478 stub_sec != NULL;
10479 stub_sec = stub_sec->next)
10480 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10481 && stub_sec->size != 0)
10482 {
10483 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
10484 if (stub_sec->contents == NULL)
10485 return FALSE;
10486 /* We want to check that built size is the same as calculated
10487 size. rawsize is a convenient location to use. */
10488 stub_sec->rawsize = stub_sec->size;
10489 stub_sec->size = 0;
10490 }
10491
10492 if (htab->glink != NULL && htab->glink->size != 0)
10493 {
10494 unsigned int indx;
10495 bfd_vma plt0;
10496
10497 /* Build the .glink plt call stub. */
10498 if (htab->emit_stub_syms)
10499 {
10500 struct elf_link_hash_entry *h;
10501 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
10502 TRUE, FALSE, FALSE);
10503 if (h == NULL)
10504 return FALSE;
10505 if (h->root.type == bfd_link_hash_new)
10506 {
10507 h->root.type = bfd_link_hash_defined;
10508 h->root.u.def.section = htab->glink;
10509 h->root.u.def.value = 8;
10510 h->ref_regular = 1;
10511 h->def_regular = 1;
10512 h->ref_regular_nonweak = 1;
10513 h->forced_local = 1;
10514 h->non_elf = 0;
10515 }
10516 }
10517 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
10518 if (info->emitrelocations)
10519 {
10520 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
10521 if (r == NULL)
10522 return FALSE;
10523 r->r_offset = (htab->glink->output_offset
10524 + htab->glink->output_section->vma);
10525 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
10526 r->r_addend = plt0;
10527 }
10528 p = htab->glink->contents;
10529 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
10530 bfd_put_64 (htab->glink->owner, plt0, p);
10531 p += 8;
10532 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
10533 p += 4;
10534 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
10535 p += 4;
10536 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
10537 p += 4;
10538 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
10539 p += 4;
10540 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
10541 p += 4;
10542 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
10543 p += 4;
10544 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
10545 p += 4;
10546 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
10547 p += 4;
10548 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
10549 p += 4;
10550 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
10551 p += 4;
10552 bfd_put_32 (htab->glink->owner, BCTR, p);
10553 p += 4;
10554 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
10555 {
10556 bfd_put_32 (htab->glink->owner, NOP, p);
10557 p += 4;
10558 }
10559
10560 /* Build the .glink lazy link call stubs. */
10561 indx = 0;
10562 while (p < htab->glink->contents + htab->glink->size)
10563 {
10564 if (indx < 0x8000)
10565 {
10566 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
10567 p += 4;
10568 }
10569 else
10570 {
10571 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
10572 p += 4;
10573 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
10574 p += 4;
10575 }
10576 bfd_put_32 (htab->glink->owner,
10577 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
10578 indx++;
10579 p += 4;
10580 }
10581 htab->glink->rawsize = p - htab->glink->contents;
10582 }
10583
10584 if (htab->brlt->size != 0)
10585 {
10586 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
10587 htab->brlt->size);
10588 if (htab->brlt->contents == NULL)
10589 return FALSE;
10590 }
10591 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
10592 {
10593 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
10594 htab->relbrlt->size);
10595 if (htab->relbrlt->contents == NULL)
10596 return FALSE;
10597 }
10598
10599 /* Build the stubs as directed by the stub hash table. */
10600 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
10601
10602 if (htab->relbrlt != NULL)
10603 htab->relbrlt->reloc_count = 0;
10604
10605 for (stub_sec = htab->stub_bfd->sections;
10606 stub_sec != NULL;
10607 stub_sec = stub_sec->next)
10608 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10609 {
10610 stub_sec_count += 1;
10611 if (stub_sec->rawsize != stub_sec->size)
10612 break;
10613 }
10614
10615 if (stub_sec != NULL
10616 || htab->glink->rawsize != htab->glink->size)
10617 {
10618 htab->stub_error = TRUE;
10619 (*_bfd_error_handler) (_("stubs don't match calculated size"));
10620 }
10621
10622 if (htab->stub_error)
10623 return FALSE;
10624
10625 if (stats != NULL)
10626 {
10627 *stats = bfd_malloc (500);
10628 if (*stats == NULL)
10629 return FALSE;
10630
10631 sprintf (*stats, _("linker stubs in %u group%s\n"
10632 " branch %lu\n"
10633 " toc adjust %lu\n"
10634 " long branch %lu\n"
10635 " long toc adj %lu\n"
10636 " plt call %lu"),
10637 stub_sec_count,
10638 stub_sec_count == 1 ? "" : "s",
10639 htab->stub_count[ppc_stub_long_branch - 1],
10640 htab->stub_count[ppc_stub_long_branch_r2off - 1],
10641 htab->stub_count[ppc_stub_plt_branch - 1],
10642 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
10643 htab->stub_count[ppc_stub_plt_call - 1]);
10644 }
10645 return TRUE;
10646 }
10647
10648 /* This function undoes the changes made by add_symbol_adjust. */
10649
10650 static bfd_boolean
10651 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10652 {
10653 struct ppc_link_hash_entry *eh;
10654
10655 if (h->root.type == bfd_link_hash_indirect)
10656 return TRUE;
10657
10658 if (h->root.type == bfd_link_hash_warning)
10659 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10660
10661 eh = (struct ppc_link_hash_entry *) h;
10662 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
10663 return TRUE;
10664
10665 eh->elf.root.type = bfd_link_hash_undefined;
10666 return TRUE;
10667 }
10668
10669 void
10670 ppc64_elf_restore_symbols (struct bfd_link_info *info)
10671 {
10672 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10673 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
10674 }
10675
10676 /* What to do when ld finds relocations against symbols defined in
10677 discarded sections. */
10678
10679 static unsigned int
10680 ppc64_elf_action_discarded (asection *sec)
10681 {
10682 if (strcmp (".opd", sec->name) == 0)
10683 return 0;
10684
10685 if (strcmp (".toc", sec->name) == 0)
10686 return 0;
10687
10688 if (strcmp (".toc1", sec->name) == 0)
10689 return 0;
10690
10691 return _bfd_elf_default_action_discarded (sec);
10692 }
10693
10694 /* The RELOCATE_SECTION function is called by the ELF backend linker
10695 to handle the relocations for a section.
10696
10697 The relocs are always passed as Rela structures; if the section
10698 actually uses Rel structures, the r_addend field will always be
10699 zero.
10700
10701 This function is responsible for adjust the section contents as
10702 necessary, and (if using Rela relocs and generating a
10703 relocatable output file) adjusting the reloc addend as
10704 necessary.
10705
10706 This function does not have to worry about setting the reloc
10707 address or the reloc symbol index.
10708
10709 LOCAL_SYMS is a pointer to the swapped in local symbols.
10710
10711 LOCAL_SECTIONS is an array giving the section in the input file
10712 corresponding to the st_shndx field of each local symbol.
10713
10714 The global hash table entry for the global symbols can be found
10715 via elf_sym_hashes (input_bfd).
10716
10717 When generating relocatable output, this function must handle
10718 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
10719 going to be the section symbol corresponding to the output
10720 section, which means that the addend must be adjusted
10721 accordingly. */
10722
10723 static bfd_boolean
10724 ppc64_elf_relocate_section (bfd *output_bfd,
10725 struct bfd_link_info *info,
10726 bfd *input_bfd,
10727 asection *input_section,
10728 bfd_byte *contents,
10729 Elf_Internal_Rela *relocs,
10730 Elf_Internal_Sym *local_syms,
10731 asection **local_sections)
10732 {
10733 struct ppc_link_hash_table *htab;
10734 Elf_Internal_Shdr *symtab_hdr;
10735 struct elf_link_hash_entry **sym_hashes;
10736 Elf_Internal_Rela *rel;
10737 Elf_Internal_Rela *relend;
10738 Elf_Internal_Rela outrel;
10739 bfd_byte *loc;
10740 struct got_entry **local_got_ents;
10741 bfd_vma TOCstart;
10742 bfd_boolean ret = TRUE;
10743 bfd_boolean is_opd;
10744 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
10745 bfd_boolean is_power4 = FALSE;
10746 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
10747
10748 /* Initialize howto table if needed. */
10749 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
10750 ppc_howto_init ();
10751
10752 htab = ppc_hash_table (info);
10753
10754 /* Don't relocate stub sections. */
10755 if (input_section->owner == htab->stub_bfd)
10756 return TRUE;
10757
10758 BFD_ASSERT (is_ppc64_elf (input_bfd));
10759
10760 local_got_ents = elf_local_got_ents (input_bfd);
10761 TOCstart = elf_gp (output_bfd);
10762 symtab_hdr = &elf_symtab_hdr (input_bfd);
10763 sym_hashes = elf_sym_hashes (input_bfd);
10764 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
10765
10766 rel = relocs;
10767 relend = relocs + input_section->reloc_count;
10768 for (; rel < relend; rel++)
10769 {
10770 enum elf_ppc64_reloc_type r_type;
10771 bfd_vma addend, orig_addend;
10772 bfd_reloc_status_type r;
10773 Elf_Internal_Sym *sym;
10774 asection *sec;
10775 struct elf_link_hash_entry *h_elf;
10776 struct ppc_link_hash_entry *h;
10777 struct ppc_link_hash_entry *fdh;
10778 const char *sym_name;
10779 unsigned long r_symndx, toc_symndx;
10780 bfd_vma toc_addend;
10781 char tls_mask, tls_gd, tls_type;
10782 char sym_type;
10783 bfd_vma relocation;
10784 bfd_boolean unresolved_reloc;
10785 bfd_boolean warned;
10786 unsigned long insn, mask;
10787 struct ppc_stub_hash_entry *stub_entry;
10788 bfd_vma max_br_offset;
10789 bfd_vma from;
10790
10791 r_type = ELF64_R_TYPE (rel->r_info);
10792 r_symndx = ELF64_R_SYM (rel->r_info);
10793
10794 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
10795 symbol of the previous ADDR64 reloc. The symbol gives us the
10796 proper TOC base to use. */
10797 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
10798 && rel != relocs
10799 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
10800 && is_opd)
10801 r_symndx = ELF64_R_SYM (rel[-1].r_info);
10802
10803 sym = NULL;
10804 sec = NULL;
10805 h_elf = NULL;
10806 sym_name = NULL;
10807 unresolved_reloc = FALSE;
10808 warned = FALSE;
10809 orig_addend = rel->r_addend;
10810
10811 if (r_symndx < symtab_hdr->sh_info)
10812 {
10813 /* It's a local symbol. */
10814 struct _opd_sec_data *opd;
10815
10816 sym = local_syms + r_symndx;
10817 sec = local_sections[r_symndx];
10818 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
10819 sym_type = ELF64_ST_TYPE (sym->st_info);
10820 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
10821 opd = get_opd_info (sec);
10822 if (opd != NULL && opd->adjust != NULL)
10823 {
10824 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
10825 if (adjust == -1)
10826 relocation = 0;
10827 else
10828 {
10829 /* If this is a relocation against the opd section sym
10830 and we have edited .opd, adjust the reloc addend so
10831 that ld -r and ld --emit-relocs output is correct.
10832 If it is a reloc against some other .opd symbol,
10833 then the symbol value will be adjusted later. */
10834 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
10835 rel->r_addend += adjust;
10836 else
10837 relocation += adjust;
10838 }
10839 }
10840 }
10841 else
10842 {
10843 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
10844 r_symndx, symtab_hdr, sym_hashes,
10845 h_elf, sec, relocation,
10846 unresolved_reloc, warned);
10847 sym_name = h_elf->root.root.string;
10848 sym_type = h_elf->type;
10849 }
10850 h = (struct ppc_link_hash_entry *) h_elf;
10851
10852 if (sec != NULL && elf_discarded_section (sec))
10853 {
10854 /* For relocs against symbols from removed linkonce sections,
10855 or sections discarded by a linker script, we just want the
10856 section contents zeroed. Avoid any special processing. */
10857 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10858 contents + rel->r_offset);
10859 rel->r_info = 0;
10860 rel->r_addend = 0;
10861 continue;
10862 }
10863
10864 if (info->relocatable)
10865 continue;
10866
10867 /* TLS optimizations. Replace instruction sequences and relocs
10868 based on information we collected in tls_optimize. We edit
10869 RELOCS so that --emit-relocs will output something sensible
10870 for the final instruction stream. */
10871 tls_mask = 0;
10872 tls_gd = 0;
10873 toc_symndx = 0;
10874 if (h != NULL)
10875 tls_mask = h->tls_mask;
10876 else if (local_got_ents != NULL)
10877 {
10878 struct plt_entry **local_plt = (struct plt_entry **)
10879 (local_got_ents + symtab_hdr->sh_info);
10880 char *lgot_masks = (char *)
10881 (local_plt + symtab_hdr->sh_info);
10882 tls_mask = lgot_masks[r_symndx];
10883 }
10884 if (tls_mask == 0
10885 && (r_type == R_PPC64_TLS
10886 || r_type == R_PPC64_TLSGD
10887 || r_type == R_PPC64_TLSLD))
10888 {
10889 /* Check for toc tls entries. */
10890 char *toc_tls;
10891
10892 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
10893 &local_syms, rel, input_bfd))
10894 return FALSE;
10895
10896 if (toc_tls)
10897 tls_mask = *toc_tls;
10898 }
10899
10900 /* Check that tls relocs are used with tls syms, and non-tls
10901 relocs are used with non-tls syms. */
10902 if (r_symndx != 0
10903 && r_type != R_PPC64_NONE
10904 && (h == NULL
10905 || h->elf.root.type == bfd_link_hash_defined
10906 || h->elf.root.type == bfd_link_hash_defweak)
10907 && (IS_PPC64_TLS_RELOC (r_type)
10908 != (sym_type == STT_TLS
10909 || (sym_type == STT_SECTION
10910 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
10911 {
10912 if (tls_mask != 0
10913 && (r_type == R_PPC64_TLS
10914 || r_type == R_PPC64_TLSGD
10915 || r_type == R_PPC64_TLSLD))
10916 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10917 ;
10918 else
10919 (*_bfd_error_handler)
10920 (!IS_PPC64_TLS_RELOC (r_type)
10921 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10922 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10923 input_bfd,
10924 input_section,
10925 (long) rel->r_offset,
10926 ppc64_elf_howto_table[r_type]->name,
10927 sym_name);
10928 }
10929
10930 /* Ensure reloc mapping code below stays sane. */
10931 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10932 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10933 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10934 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10935 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10936 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10937 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10938 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10939 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10940 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10941 abort ();
10942
10943 switch (r_type)
10944 {
10945 default:
10946 break;
10947
10948 case R_PPC64_TOC16:
10949 case R_PPC64_TOC16_LO:
10950 case R_PPC64_TOC16_DS:
10951 case R_PPC64_TOC16_LO_DS:
10952 {
10953 /* Check for toc tls entries. */
10954 char *toc_tls;
10955 int retval;
10956
10957 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
10958 &local_syms, rel, input_bfd);
10959 if (retval == 0)
10960 return FALSE;
10961
10962 if (toc_tls)
10963 {
10964 tls_mask = *toc_tls;
10965 if (r_type == R_PPC64_TOC16_DS
10966 || r_type == R_PPC64_TOC16_LO_DS)
10967 {
10968 if (tls_mask != 0
10969 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10970 goto toctprel;
10971 }
10972 else
10973 {
10974 /* If we found a GD reloc pair, then we might be
10975 doing a GD->IE transition. */
10976 if (retval == 2)
10977 {
10978 tls_gd = TLS_TPRELGD;
10979 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10980 goto tls_ldgd_opt;
10981 }
10982 else if (retval == 3)
10983 {
10984 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10985 goto tls_ldgd_opt;
10986 }
10987 }
10988 }
10989 }
10990 break;
10991
10992 case R_PPC64_GOT_TPREL16_DS:
10993 case R_PPC64_GOT_TPREL16_LO_DS:
10994 if (tls_mask != 0
10995 && (tls_mask & TLS_TPREL) == 0)
10996 {
10997 toctprel:
10998 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10999 insn &= 31 << 21;
11000 insn |= 0x3c0d0000; /* addis 0,13,0 */
11001 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11002 r_type = R_PPC64_TPREL16_HA;
11003 if (toc_symndx != 0)
11004 {
11005 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11006 rel->r_addend = toc_addend;
11007 /* We changed the symbol. Start over in order to
11008 get h, sym, sec etc. right. */
11009 rel--;
11010 continue;
11011 }
11012 else
11013 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11014 }
11015 break;
11016
11017 case R_PPC64_TLS:
11018 if (tls_mask != 0
11019 && (tls_mask & TLS_TPREL) == 0)
11020 {
11021 bfd_vma rtra;
11022 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11023 if ((insn & ((0x3f << 26) | (31 << 11)))
11024 == ((31 << 26) | (13 << 11)))
11025 rtra = insn & ((1 << 26) - (1 << 16));
11026 else if ((insn & ((0x3f << 26) | (31 << 16)))
11027 == ((31 << 26) | (13 << 16)))
11028 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
11029 else
11030 abort ();
11031 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
11032 /* add -> addi. */
11033 insn = 14 << 26;
11034 else if ((insn & (31 << 1)) == 23 << 1
11035 && ((insn & (31 << 6)) < 14 << 6
11036 || ((insn & (31 << 6)) >= 16 << 6
11037 && (insn & (31 << 6)) < 24 << 6)))
11038 /* load and store indexed -> dform. */
11039 insn = (32 | ((insn >> 6) & 31)) << 26;
11040 else if ((insn & (31 << 1)) == 21 << 1
11041 && (insn & (0x1a << 6)) == 0)
11042 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
11043 insn = (((58 | ((insn >> 6) & 4)) << 26)
11044 | ((insn >> 6) & 1));
11045 else if ((insn & (31 << 1)) == 21 << 1
11046 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
11047 /* lwax -> lwa. */
11048 insn = (58 << 26) | 2;
11049 else
11050 abort ();
11051 insn |= rtra;
11052 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11053 /* Was PPC64_TLS which sits on insn boundary, now
11054 PPC64_TPREL16_LO which is at low-order half-word. */
11055 rel->r_offset += d_offset;
11056 r_type = R_PPC64_TPREL16_LO;
11057 if (toc_symndx != 0)
11058 {
11059 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11060 rel->r_addend = toc_addend;
11061 /* We changed the symbol. Start over in order to
11062 get h, sym, sec etc. right. */
11063 rel--;
11064 continue;
11065 }
11066 else
11067 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11068 }
11069 break;
11070
11071 case R_PPC64_GOT_TLSGD16_HI:
11072 case R_PPC64_GOT_TLSGD16_HA:
11073 tls_gd = TLS_TPRELGD;
11074 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11075 goto tls_gdld_hi;
11076 break;
11077
11078 case R_PPC64_GOT_TLSLD16_HI:
11079 case R_PPC64_GOT_TLSLD16_HA:
11080 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11081 {
11082 tls_gdld_hi:
11083 if ((tls_mask & tls_gd) != 0)
11084 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11085 + R_PPC64_GOT_TPREL16_DS);
11086 else
11087 {
11088 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11089 rel->r_offset -= d_offset;
11090 r_type = R_PPC64_NONE;
11091 }
11092 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11093 }
11094 break;
11095
11096 case R_PPC64_GOT_TLSGD16:
11097 case R_PPC64_GOT_TLSGD16_LO:
11098 tls_gd = TLS_TPRELGD;
11099 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11100 goto tls_ldgd_opt;
11101 break;
11102
11103 case R_PPC64_GOT_TLSLD16:
11104 case R_PPC64_GOT_TLSLD16_LO:
11105 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11106 {
11107 unsigned int insn1, insn2, insn3;
11108 bfd_vma offset;
11109
11110 tls_ldgd_opt:
11111 offset = (bfd_vma) -1;
11112 /* If not using the newer R_PPC64_TLSGD/LD to mark
11113 __tls_get_addr calls, we must trust that the call
11114 stays with its arg setup insns, ie. that the next
11115 reloc is the __tls_get_addr call associated with
11116 the current reloc. Edit both insns. */
11117 if (input_section->has_tls_get_addr_call
11118 && rel + 1 < relend
11119 && branch_reloc_hash_match (input_bfd, rel + 1,
11120 htab->tls_get_addr,
11121 htab->tls_get_addr_fd))
11122 offset = rel[1].r_offset;
11123 if ((tls_mask & tls_gd) != 0)
11124 {
11125 /* IE */
11126 insn1 = bfd_get_32 (output_bfd,
11127 contents + rel->r_offset - d_offset);
11128 insn1 &= (1 << 26) - (1 << 2);
11129 insn1 |= 58 << 26; /* ld */
11130 insn2 = 0x7c636a14; /* add 3,3,13 */
11131 if (offset != (bfd_vma) -1)
11132 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
11133 R_PPC64_NONE);
11134 if ((tls_mask & TLS_EXPLICIT) == 0)
11135 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11136 + R_PPC64_GOT_TPREL16_DS);
11137 else
11138 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11139 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11140 }
11141 else
11142 {
11143 /* LE */
11144 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11145 insn2 = 0x38630000; /* addi 3,3,0 */
11146 if (tls_gd == 0)
11147 {
11148 /* Was an LD reloc. */
11149 if (toc_symndx)
11150 sec = local_sections[toc_symndx];
11151 for (r_symndx = 0;
11152 r_symndx < symtab_hdr->sh_info;
11153 r_symndx++)
11154 if (local_sections[r_symndx] == sec)
11155 break;
11156 if (r_symndx >= symtab_hdr->sh_info)
11157 r_symndx = 0;
11158 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11159 if (r_symndx != 0)
11160 rel->r_addend -= (local_syms[r_symndx].st_value
11161 + sec->output_offset
11162 + sec->output_section->vma);
11163 }
11164 else if (toc_symndx != 0)
11165 {
11166 r_symndx = toc_symndx;
11167 rel->r_addend = toc_addend;
11168 }
11169 r_type = R_PPC64_TPREL16_HA;
11170 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11171 if (offset != (bfd_vma) -1)
11172 {
11173 rel[1].r_info = ELF64_R_INFO (r_symndx,
11174 R_PPC64_TPREL16_LO);
11175 rel[1].r_offset = offset + d_offset;
11176 rel[1].r_addend = rel->r_addend;
11177 }
11178 }
11179 bfd_put_32 (output_bfd, insn1,
11180 contents + rel->r_offset - d_offset);
11181 if (offset != (bfd_vma) -1)
11182 {
11183 insn3 = bfd_get_32 (output_bfd,
11184 contents + offset + 4);
11185 if (insn3 == NOP
11186 || insn3 == CROR_151515 || insn3 == CROR_313131)
11187 {
11188 rel[1].r_offset += 4;
11189 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11190 insn2 = NOP;
11191 }
11192 bfd_put_32 (output_bfd, insn2, contents + offset);
11193 }
11194 if ((tls_mask & tls_gd) == 0
11195 && (tls_gd == 0 || toc_symndx != 0))
11196 {
11197 /* We changed the symbol. Start over in order
11198 to get h, sym, sec etc. right. */
11199 rel--;
11200 continue;
11201 }
11202 }
11203 break;
11204
11205 case R_PPC64_TLSGD:
11206 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11207 {
11208 unsigned int insn2, insn3;
11209 bfd_vma offset = rel->r_offset;
11210
11211 if ((tls_mask & TLS_TPRELGD) != 0)
11212 {
11213 /* IE */
11214 r_type = R_PPC64_NONE;
11215 insn2 = 0x7c636a14; /* add 3,3,13 */
11216 }
11217 else
11218 {
11219 /* LE */
11220 if (toc_symndx != 0)
11221 {
11222 r_symndx = toc_symndx;
11223 rel->r_addend = toc_addend;
11224 }
11225 r_type = R_PPC64_TPREL16_LO;
11226 rel->r_offset = offset + d_offset;
11227 insn2 = 0x38630000; /* addi 3,3,0 */
11228 }
11229 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11230 /* Zap the reloc on the _tls_get_addr call too. */
11231 BFD_ASSERT (offset == rel[1].r_offset);
11232 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
11233 R_PPC64_NONE);
11234 insn3 = bfd_get_32 (output_bfd,
11235 contents + offset + 4);
11236 if (insn3 == NOP
11237 || insn3 == CROR_151515 || insn3 == CROR_313131)
11238 {
11239 rel->r_offset += 4;
11240 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11241 insn2 = NOP;
11242 }
11243 bfd_put_32 (output_bfd, insn2, contents + offset);
11244 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
11245 {
11246 rel--;
11247 continue;
11248 }
11249 }
11250 break;
11251
11252 case R_PPC64_TLSLD:
11253 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11254 {
11255 unsigned int insn2, insn3;
11256 bfd_vma offset = rel->r_offset;
11257
11258 if (toc_symndx)
11259 sec = local_sections[toc_symndx];
11260 for (r_symndx = 0;
11261 r_symndx < symtab_hdr->sh_info;
11262 r_symndx++)
11263 if (local_sections[r_symndx] == sec)
11264 break;
11265 if (r_symndx >= symtab_hdr->sh_info)
11266 r_symndx = 0;
11267 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11268 if (r_symndx != 0)
11269 rel->r_addend -= (local_syms[r_symndx].st_value
11270 + sec->output_offset
11271 + sec->output_section->vma);
11272
11273 r_type = R_PPC64_TPREL16_LO;
11274 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11275 rel->r_offset = offset + d_offset;
11276 /* Zap the reloc on the _tls_get_addr call too. */
11277 BFD_ASSERT (offset == rel[1].r_offset);
11278 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
11279 R_PPC64_NONE);
11280 insn2 = 0x38630000; /* addi 3,3,0 */
11281 insn3 = bfd_get_32 (output_bfd,
11282 contents + offset + 4);
11283 if (insn3 == NOP
11284 || insn3 == CROR_151515 || insn3 == CROR_313131)
11285 {
11286 rel->r_offset += 4;
11287 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11288 insn2 = NOP;
11289 }
11290 bfd_put_32 (output_bfd, insn2, contents + offset);
11291 rel--;
11292 continue;
11293 }
11294 break;
11295
11296 case R_PPC64_DTPMOD64:
11297 if (rel + 1 < relend
11298 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
11299 && rel[1].r_offset == rel->r_offset + 8)
11300 {
11301 if ((tls_mask & TLS_GD) == 0)
11302 {
11303 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
11304 if ((tls_mask & TLS_TPRELGD) != 0)
11305 r_type = R_PPC64_TPREL64;
11306 else
11307 {
11308 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11309 r_type = R_PPC64_NONE;
11310 }
11311 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11312 }
11313 }
11314 else
11315 {
11316 if ((tls_mask & TLS_LD) == 0)
11317 {
11318 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11319 r_type = R_PPC64_NONE;
11320 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11321 }
11322 }
11323 break;
11324
11325 case R_PPC64_TPREL64:
11326 if ((tls_mask & TLS_TPREL) == 0)
11327 {
11328 r_type = R_PPC64_NONE;
11329 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11330 }
11331 break;
11332 }
11333
11334 /* Handle other relocations that tweak non-addend part of insn. */
11335 insn = 0;
11336 max_br_offset = 1 << 25;
11337 addend = rel->r_addend;
11338 switch (r_type)
11339 {
11340 default:
11341 break;
11342
11343 /* Branch taken prediction relocations. */
11344 case R_PPC64_ADDR14_BRTAKEN:
11345 case R_PPC64_REL14_BRTAKEN:
11346 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
11347 /* Fall thru. */
11348
11349 /* Branch not taken prediction relocations. */
11350 case R_PPC64_ADDR14_BRNTAKEN:
11351 case R_PPC64_REL14_BRNTAKEN:
11352 insn |= bfd_get_32 (output_bfd,
11353 contents + rel->r_offset) & ~(0x01 << 21);
11354 /* Fall thru. */
11355
11356 case R_PPC64_REL14:
11357 max_br_offset = 1 << 15;
11358 /* Fall thru. */
11359
11360 case R_PPC64_REL24:
11361 /* Calls to functions with a different TOC, such as calls to
11362 shared objects, need to alter the TOC pointer. This is
11363 done using a linkage stub. A REL24 branching to these
11364 linkage stubs needs to be followed by a nop, as the nop
11365 will be replaced with an instruction to restore the TOC
11366 base pointer. */
11367 stub_entry = NULL;
11368 fdh = h;
11369 if (h != NULL
11370 && h->oh != NULL
11371 && h->oh->is_func_descriptor)
11372 fdh = ppc_follow_link (h->oh);
11373 if (((fdh != NULL
11374 && fdh->elf.plt.plist != NULL)
11375 || (sec != NULL
11376 && sec->output_section != NULL
11377 && sec->id <= htab->top_id
11378 && (htab->stub_group[sec->id].toc_off
11379 != htab->stub_group[input_section->id].toc_off))
11380 || (h == NULL
11381 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
11382 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
11383 rel, htab)) != NULL
11384 && (stub_entry->stub_type == ppc_stub_plt_call
11385 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
11386 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
11387 {
11388 bfd_boolean can_plt_call = FALSE;
11389
11390 if (rel->r_offset + 8 <= input_section->size)
11391 {
11392 unsigned long nop;
11393 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
11394 if (nop == NOP
11395 || nop == CROR_151515 || nop == CROR_313131)
11396 {
11397 if (h != NULL
11398 && (h == htab->tls_get_addr_fd
11399 || h == htab->tls_get_addr)
11400 && !htab->no_tls_get_addr_opt)
11401 {
11402 /* Special stub used, leave nop alone. */
11403 }
11404 else
11405 bfd_put_32 (input_bfd, LD_R2_40R1,
11406 contents + rel->r_offset + 4);
11407 can_plt_call = TRUE;
11408 }
11409 }
11410
11411 if (!can_plt_call)
11412 {
11413 if (stub_entry->stub_type == ppc_stub_plt_call)
11414 {
11415 /* If this is a plain branch rather than a branch
11416 and link, don't require a nop. However, don't
11417 allow tail calls in a shared library as they
11418 will result in r2 being corrupted. */
11419 unsigned long br;
11420 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
11421 if (info->executable && (br & 1) == 0)
11422 can_plt_call = TRUE;
11423 else
11424 stub_entry = NULL;
11425 }
11426 else if (h != NULL
11427 && strcmp (h->elf.root.root.string,
11428 ".__libc_start_main") == 0)
11429 {
11430 /* Allow crt1 branch to go via a toc adjusting stub. */
11431 can_plt_call = TRUE;
11432 }
11433 else
11434 {
11435 if (strcmp (input_section->output_section->name,
11436 ".init") == 0
11437 || strcmp (input_section->output_section->name,
11438 ".fini") == 0)
11439 (*_bfd_error_handler)
11440 (_("%B(%A+0x%lx): automatic multiple TOCs "
11441 "not supported using your crt files; "
11442 "recompile with -mminimal-toc or upgrade gcc"),
11443 input_bfd,
11444 input_section,
11445 (long) rel->r_offset);
11446 else
11447 (*_bfd_error_handler)
11448 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
11449 "does not allow automatic multiple TOCs; "
11450 "recompile with -mminimal-toc or "
11451 "-fno-optimize-sibling-calls, "
11452 "or make `%s' extern"),
11453 input_bfd,
11454 input_section,
11455 (long) rel->r_offset,
11456 sym_name,
11457 sym_name);
11458 bfd_set_error (bfd_error_bad_value);
11459 ret = FALSE;
11460 }
11461 }
11462
11463 if (can_plt_call
11464 && stub_entry->stub_type == ppc_stub_plt_call)
11465 unresolved_reloc = FALSE;
11466 }
11467
11468 if (stub_entry == NULL
11469 && get_opd_info (sec) != NULL)
11470 {
11471 /* The branch destination is the value of the opd entry. */
11472 bfd_vma off = (relocation + addend
11473 - sec->output_section->vma
11474 - sec->output_offset);
11475 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
11476 if (dest != (bfd_vma) -1)
11477 {
11478 relocation = dest;
11479 addend = 0;
11480 }
11481 }
11482
11483 /* If the branch is out of reach we ought to have a long
11484 branch stub. */
11485 from = (rel->r_offset
11486 + input_section->output_offset
11487 + input_section->output_section->vma);
11488
11489 if (stub_entry == NULL
11490 && (relocation + addend - from + max_br_offset
11491 >= 2 * max_br_offset)
11492 && r_type != R_PPC64_ADDR14_BRTAKEN
11493 && r_type != R_PPC64_ADDR14_BRNTAKEN)
11494 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
11495 htab);
11496
11497 if (stub_entry != NULL)
11498 {
11499 /* Munge up the value and addend so that we call the stub
11500 rather than the procedure directly. */
11501 relocation = (stub_entry->stub_offset
11502 + stub_entry->stub_sec->output_offset
11503 + stub_entry->stub_sec->output_section->vma);
11504 addend = 0;
11505 }
11506
11507 if (insn != 0)
11508 {
11509 if (is_power4)
11510 {
11511 /* Set 'a' bit. This is 0b00010 in BO field for branch
11512 on CR(BI) insns (BO == 001at or 011at), and 0b01000
11513 for branch on CTR insns (BO == 1a00t or 1a01t). */
11514 if ((insn & (0x14 << 21)) == (0x04 << 21))
11515 insn |= 0x02 << 21;
11516 else if ((insn & (0x14 << 21)) == (0x10 << 21))
11517 insn |= 0x08 << 21;
11518 else
11519 break;
11520 }
11521 else
11522 {
11523 /* Invert 'y' bit if not the default. */
11524 if ((bfd_signed_vma) (relocation + addend - from) < 0)
11525 insn ^= 0x01 << 21;
11526 }
11527
11528 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11529 }
11530
11531 /* NOP out calls to undefined weak functions.
11532 We can thus call a weak function without first
11533 checking whether the function is defined. */
11534 else if (h != NULL
11535 && h->elf.root.type == bfd_link_hash_undefweak
11536 && r_type == R_PPC64_REL24
11537 && relocation == 0
11538 && addend == 0)
11539 {
11540 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11541 continue;
11542 }
11543 break;
11544 }
11545
11546 /* Set `addend'. */
11547 tls_type = 0;
11548 switch (r_type)
11549 {
11550 default:
11551 (*_bfd_error_handler)
11552 (_("%B: unknown relocation type %d for symbol %s"),
11553 input_bfd, (int) r_type, sym_name);
11554
11555 bfd_set_error (bfd_error_bad_value);
11556 ret = FALSE;
11557 continue;
11558
11559 case R_PPC64_NONE:
11560 case R_PPC64_TLS:
11561 case R_PPC64_TLSGD:
11562 case R_PPC64_TLSLD:
11563 case R_PPC64_GNU_VTINHERIT:
11564 case R_PPC64_GNU_VTENTRY:
11565 continue;
11566
11567 /* GOT16 relocations. Like an ADDR16 using the symbol's
11568 address in the GOT as relocation value instead of the
11569 symbol's value itself. Also, create a GOT entry for the
11570 symbol and put the symbol value there. */
11571 case R_PPC64_GOT_TLSGD16:
11572 case R_PPC64_GOT_TLSGD16_LO:
11573 case R_PPC64_GOT_TLSGD16_HI:
11574 case R_PPC64_GOT_TLSGD16_HA:
11575 tls_type = TLS_TLS | TLS_GD;
11576 goto dogot;
11577
11578 case R_PPC64_GOT_TLSLD16:
11579 case R_PPC64_GOT_TLSLD16_LO:
11580 case R_PPC64_GOT_TLSLD16_HI:
11581 case R_PPC64_GOT_TLSLD16_HA:
11582 tls_type = TLS_TLS | TLS_LD;
11583 goto dogot;
11584
11585 case R_PPC64_GOT_TPREL16_DS:
11586 case R_PPC64_GOT_TPREL16_LO_DS:
11587 case R_PPC64_GOT_TPREL16_HI:
11588 case R_PPC64_GOT_TPREL16_HA:
11589 tls_type = TLS_TLS | TLS_TPREL;
11590 goto dogot;
11591
11592 case R_PPC64_GOT_DTPREL16_DS:
11593 case R_PPC64_GOT_DTPREL16_LO_DS:
11594 case R_PPC64_GOT_DTPREL16_HI:
11595 case R_PPC64_GOT_DTPREL16_HA:
11596 tls_type = TLS_TLS | TLS_DTPREL;
11597 goto dogot;
11598
11599 case R_PPC64_GOT16:
11600 case R_PPC64_GOT16_LO:
11601 case R_PPC64_GOT16_HI:
11602 case R_PPC64_GOT16_HA:
11603 case R_PPC64_GOT16_DS:
11604 case R_PPC64_GOT16_LO_DS:
11605 dogot:
11606 {
11607 /* Relocation is to the entry for this symbol in the global
11608 offset table. */
11609 asection *got;
11610 bfd_vma *offp;
11611 bfd_vma off;
11612 unsigned long indx = 0;
11613
11614 if (tls_type == (TLS_TLS | TLS_LD)
11615 && (h == NULL
11616 || !h->elf.def_dynamic))
11617 offp = &ppc64_tlsld_got (input_bfd)->offset;
11618 else
11619 {
11620 struct got_entry *ent;
11621
11622 if (h != NULL)
11623 {
11624 bfd_boolean dyn = htab->elf.dynamic_sections_created;
11625 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
11626 &h->elf)
11627 || (info->shared
11628 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
11629 /* This is actually a static link, or it is a
11630 -Bsymbolic link and the symbol is defined
11631 locally, or the symbol was forced to be local
11632 because of a version file. */
11633 ;
11634 else
11635 {
11636 indx = h->elf.dynindx;
11637 unresolved_reloc = FALSE;
11638 }
11639 ent = h->elf.got.glist;
11640 }
11641 else
11642 {
11643 if (local_got_ents == NULL)
11644 abort ();
11645 ent = local_got_ents[r_symndx];
11646 }
11647
11648 for (; ent != NULL; ent = ent->next)
11649 if (ent->addend == orig_addend
11650 && ent->owner == input_bfd
11651 && ent->tls_type == tls_type)
11652 break;
11653 if (ent == NULL)
11654 abort ();
11655 offp = &ent->got.offset;
11656 }
11657
11658 got = ppc64_elf_tdata (input_bfd)->got;
11659 if (got == NULL)
11660 abort ();
11661
11662 /* The offset must always be a multiple of 8. We use the
11663 least significant bit to record whether we have already
11664 processed this entry. */
11665 off = *offp;
11666 if ((off & 1) != 0)
11667 off &= ~1;
11668 else
11669 {
11670 /* Generate relocs for the dynamic linker, except in
11671 the case of TLSLD where we'll use one entry per
11672 module. */
11673 asection *relgot;
11674 bfd_boolean ifunc;
11675
11676 *offp = off | 1;
11677 relgot = NULL;
11678 ifunc = (h != NULL
11679 ? h->elf.type == STT_GNU_IFUNC
11680 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
11681 if ((info->shared || indx != 0)
11682 && (offp == &ppc64_tlsld_got (input_bfd)->offset
11683 || h == NULL
11684 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11685 || h->elf.root.type != bfd_link_hash_undefweak))
11686 relgot = ppc64_elf_tdata (input_bfd)->relgot;
11687 else if (ifunc)
11688 relgot = htab->reliplt;
11689 if (relgot != NULL)
11690 {
11691 outrel.r_offset = (got->output_section->vma
11692 + got->output_offset
11693 + off);
11694 outrel.r_addend = addend;
11695 if (tls_type & (TLS_LD | TLS_GD))
11696 {
11697 outrel.r_addend = 0;
11698 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
11699 if (tls_type == (TLS_TLS | TLS_GD))
11700 {
11701 loc = relgot->contents;
11702 loc += (relgot->reloc_count++
11703 * sizeof (Elf64_External_Rela));
11704 bfd_elf64_swap_reloca_out (output_bfd,
11705 &outrel, loc);
11706 outrel.r_offset += 8;
11707 outrel.r_addend = addend;
11708 outrel.r_info
11709 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11710 }
11711 }
11712 else if (tls_type == (TLS_TLS | TLS_DTPREL))
11713 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11714 else if (tls_type == (TLS_TLS | TLS_TPREL))
11715 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
11716 else if (indx != 0)
11717 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
11718 else
11719 {
11720 if (ifunc)
11721 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11722 else
11723 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11724
11725 /* Write the .got section contents for the sake
11726 of prelink. */
11727 loc = got->contents + off;
11728 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
11729 loc);
11730 }
11731
11732 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
11733 {
11734 outrel.r_addend += relocation;
11735 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
11736 outrel.r_addend -= htab->elf.tls_sec->vma;
11737 }
11738 loc = relgot->contents;
11739 loc += (relgot->reloc_count++
11740 * sizeof (Elf64_External_Rela));
11741 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11742 }
11743
11744 /* Init the .got section contents here if we're not
11745 emitting a reloc. */
11746 else
11747 {
11748 relocation += addend;
11749 if (tls_type == (TLS_TLS | TLS_LD))
11750 relocation = 1;
11751 else if (tls_type != 0)
11752 {
11753 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
11754 if (tls_type == (TLS_TLS | TLS_TPREL))
11755 relocation += DTP_OFFSET - TP_OFFSET;
11756
11757 if (tls_type == (TLS_TLS | TLS_GD))
11758 {
11759 bfd_put_64 (output_bfd, relocation,
11760 got->contents + off + 8);
11761 relocation = 1;
11762 }
11763 }
11764
11765 bfd_put_64 (output_bfd, relocation,
11766 got->contents + off);
11767 }
11768 }
11769
11770 if (off >= (bfd_vma) -2)
11771 abort ();
11772
11773 relocation = got->output_offset + off;
11774
11775 /* TOC base (r2) is TOC start plus 0x8000. */
11776 addend = -TOC_BASE_OFF;
11777 }
11778 break;
11779
11780 case R_PPC64_PLT16_HA:
11781 case R_PPC64_PLT16_HI:
11782 case R_PPC64_PLT16_LO:
11783 case R_PPC64_PLT32:
11784 case R_PPC64_PLT64:
11785 /* Relocation is to the entry for this symbol in the
11786 procedure linkage table. */
11787
11788 /* Resolve a PLT reloc against a local symbol directly,
11789 without using the procedure linkage table. */
11790 if (h == NULL)
11791 break;
11792
11793 /* It's possible that we didn't make a PLT entry for this
11794 symbol. This happens when statically linking PIC code,
11795 or when using -Bsymbolic. Go find a match if there is a
11796 PLT entry. */
11797 if (htab->plt != NULL)
11798 {
11799 struct plt_entry *ent;
11800 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
11801 if (ent->addend == orig_addend
11802 && ent->plt.offset != (bfd_vma) -1)
11803 {
11804 relocation = (htab->plt->output_section->vma
11805 + htab->plt->output_offset
11806 + ent->plt.offset);
11807 unresolved_reloc = FALSE;
11808 }
11809 }
11810 break;
11811
11812 case R_PPC64_TOC:
11813 /* Relocation value is TOC base. */
11814 relocation = TOCstart;
11815 if (r_symndx == 0)
11816 relocation += htab->stub_group[input_section->id].toc_off;
11817 else if (unresolved_reloc)
11818 ;
11819 else if (sec != NULL && sec->id <= htab->top_id)
11820 relocation += htab->stub_group[sec->id].toc_off;
11821 else
11822 unresolved_reloc = TRUE;
11823 goto dodyn;
11824
11825 /* TOC16 relocs. We want the offset relative to the TOC base,
11826 which is the address of the start of the TOC plus 0x8000.
11827 The TOC consists of sections .got, .toc, .tocbss, and .plt,
11828 in this order. */
11829 case R_PPC64_TOC16:
11830 case R_PPC64_TOC16_LO:
11831 case R_PPC64_TOC16_HI:
11832 case R_PPC64_TOC16_DS:
11833 case R_PPC64_TOC16_LO_DS:
11834 case R_PPC64_TOC16_HA:
11835 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
11836 break;
11837
11838 /* Relocate against the beginning of the section. */
11839 case R_PPC64_SECTOFF:
11840 case R_PPC64_SECTOFF_LO:
11841 case R_PPC64_SECTOFF_HI:
11842 case R_PPC64_SECTOFF_DS:
11843 case R_PPC64_SECTOFF_LO_DS:
11844 case R_PPC64_SECTOFF_HA:
11845 if (sec != NULL)
11846 addend -= sec->output_section->vma;
11847 break;
11848
11849 case R_PPC64_REL16:
11850 case R_PPC64_REL16_LO:
11851 case R_PPC64_REL16_HI:
11852 case R_PPC64_REL16_HA:
11853 break;
11854
11855 case R_PPC64_REL14:
11856 case R_PPC64_REL14_BRNTAKEN:
11857 case R_PPC64_REL14_BRTAKEN:
11858 case R_PPC64_REL24:
11859 break;
11860
11861 case R_PPC64_TPREL16:
11862 case R_PPC64_TPREL16_LO:
11863 case R_PPC64_TPREL16_HI:
11864 case R_PPC64_TPREL16_HA:
11865 case R_PPC64_TPREL16_DS:
11866 case R_PPC64_TPREL16_LO_DS:
11867 case R_PPC64_TPREL16_HIGHER:
11868 case R_PPC64_TPREL16_HIGHERA:
11869 case R_PPC64_TPREL16_HIGHEST:
11870 case R_PPC64_TPREL16_HIGHESTA:
11871 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11872 if (info->shared)
11873 /* The TPREL16 relocs shouldn't really be used in shared
11874 libs as they will result in DT_TEXTREL being set, but
11875 support them anyway. */
11876 goto dodyn;
11877 break;
11878
11879 case R_PPC64_DTPREL16:
11880 case R_PPC64_DTPREL16_LO:
11881 case R_PPC64_DTPREL16_HI:
11882 case R_PPC64_DTPREL16_HA:
11883 case R_PPC64_DTPREL16_DS:
11884 case R_PPC64_DTPREL16_LO_DS:
11885 case R_PPC64_DTPREL16_HIGHER:
11886 case R_PPC64_DTPREL16_HIGHERA:
11887 case R_PPC64_DTPREL16_HIGHEST:
11888 case R_PPC64_DTPREL16_HIGHESTA:
11889 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11890 break;
11891
11892 case R_PPC64_DTPMOD64:
11893 relocation = 1;
11894 addend = 0;
11895 goto dodyn;
11896
11897 case R_PPC64_TPREL64:
11898 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11899 goto dodyn;
11900
11901 case R_PPC64_DTPREL64:
11902 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11903 /* Fall thru */
11904
11905 /* Relocations that may need to be propagated if this is a
11906 dynamic object. */
11907 case R_PPC64_REL30:
11908 case R_PPC64_REL32:
11909 case R_PPC64_REL64:
11910 case R_PPC64_ADDR14:
11911 case R_PPC64_ADDR14_BRNTAKEN:
11912 case R_PPC64_ADDR14_BRTAKEN:
11913 case R_PPC64_ADDR16:
11914 case R_PPC64_ADDR16_DS:
11915 case R_PPC64_ADDR16_HA:
11916 case R_PPC64_ADDR16_HI:
11917 case R_PPC64_ADDR16_HIGHER:
11918 case R_PPC64_ADDR16_HIGHERA:
11919 case R_PPC64_ADDR16_HIGHEST:
11920 case R_PPC64_ADDR16_HIGHESTA:
11921 case R_PPC64_ADDR16_LO:
11922 case R_PPC64_ADDR16_LO_DS:
11923 case R_PPC64_ADDR24:
11924 case R_PPC64_ADDR32:
11925 case R_PPC64_ADDR64:
11926 case R_PPC64_UADDR16:
11927 case R_PPC64_UADDR32:
11928 case R_PPC64_UADDR64:
11929 dodyn:
11930 if ((input_section->flags & SEC_ALLOC) == 0)
11931 break;
11932
11933 if (NO_OPD_RELOCS && is_opd)
11934 break;
11935
11936 if ((info->shared
11937 && (h == NULL
11938 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11939 || h->elf.root.type != bfd_link_hash_undefweak)
11940 && (must_be_dyn_reloc (info, r_type)
11941 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
11942 || (ELIMINATE_COPY_RELOCS
11943 && !info->shared
11944 && h != NULL
11945 && h->elf.dynindx != -1
11946 && !h->elf.non_got_ref
11947 && !h->elf.def_regular)
11948 || (!info->shared
11949 && (h != NULL
11950 ? h->elf.type == STT_GNU_IFUNC
11951 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
11952 {
11953 Elf_Internal_Rela outrel;
11954 bfd_boolean skip, relocate;
11955 asection *sreloc;
11956 bfd_byte *loc;
11957 bfd_vma out_off;
11958
11959 /* When generating a dynamic object, these relocations
11960 are copied into the output file to be resolved at run
11961 time. */
11962
11963 skip = FALSE;
11964 relocate = FALSE;
11965
11966 out_off = _bfd_elf_section_offset (output_bfd, info,
11967 input_section, rel->r_offset);
11968 if (out_off == (bfd_vma) -1)
11969 skip = TRUE;
11970 else if (out_off == (bfd_vma) -2)
11971 skip = TRUE, relocate = TRUE;
11972 out_off += (input_section->output_section->vma
11973 + input_section->output_offset);
11974 outrel.r_offset = out_off;
11975 outrel.r_addend = rel->r_addend;
11976
11977 /* Optimize unaligned reloc use. */
11978 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
11979 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
11980 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
11981 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
11982 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
11983 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
11984 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
11985 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
11986 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
11987
11988 if (skip)
11989 memset (&outrel, 0, sizeof outrel);
11990 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
11991 && !is_opd
11992 && r_type != R_PPC64_TOC)
11993 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
11994 else
11995 {
11996 /* This symbol is local, or marked to become local,
11997 or this is an opd section reloc which must point
11998 at a local function. */
11999 outrel.r_addend += relocation;
12000 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12001 {
12002 if (is_opd && h != NULL)
12003 {
12004 /* Lie about opd entries. This case occurs
12005 when building shared libraries and we
12006 reference a function in another shared
12007 lib. The same thing happens for a weak
12008 definition in an application that's
12009 overridden by a strong definition in a
12010 shared lib. (I believe this is a generic
12011 bug in binutils handling of weak syms.)
12012 In these cases we won't use the opd
12013 entry in this lib. */
12014 unresolved_reloc = FALSE;
12015 }
12016 if (!is_opd
12017 && r_type == R_PPC64_ADDR64
12018 && (h != NULL
12019 ? h->elf.type == STT_GNU_IFUNC
12020 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12021 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12022 else
12023 {
12024 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12025
12026 /* We need to relocate .opd contents for ld.so.
12027 Prelink also wants simple and consistent rules
12028 for relocs. This make all RELATIVE relocs have
12029 *r_offset equal to r_addend. */
12030 relocate = TRUE;
12031 }
12032 }
12033 else
12034 {
12035 long indx = 0;
12036
12037 if (h != NULL
12038 ? h->elf.type == STT_GNU_IFUNC
12039 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12040 {
12041 (*_bfd_error_handler)
12042 (_("%B(%A+0x%lx): relocation %s for indirect "
12043 "function %s unsupported"),
12044 input_bfd,
12045 input_section,
12046 (long) rel->r_offset,
12047 ppc64_elf_howto_table[r_type]->name,
12048 sym_name);
12049 ret = FALSE;
12050 }
12051 else if (r_symndx == 0 || bfd_is_abs_section (sec))
12052 ;
12053 else if (sec == NULL || sec->owner == NULL)
12054 {
12055 bfd_set_error (bfd_error_bad_value);
12056 return FALSE;
12057 }
12058 else
12059 {
12060 asection *osec;
12061
12062 osec = sec->output_section;
12063 indx = elf_section_data (osec)->dynindx;
12064
12065 if (indx == 0)
12066 {
12067 if ((osec->flags & SEC_READONLY) == 0
12068 && htab->elf.data_index_section != NULL)
12069 osec = htab->elf.data_index_section;
12070 else
12071 osec = htab->elf.text_index_section;
12072 indx = elf_section_data (osec)->dynindx;
12073 }
12074 BFD_ASSERT (indx != 0);
12075
12076 /* We are turning this relocation into one
12077 against a section symbol, so subtract out
12078 the output section's address but not the
12079 offset of the input section in the output
12080 section. */
12081 outrel.r_addend -= osec->vma;
12082 }
12083
12084 outrel.r_info = ELF64_R_INFO (indx, r_type);
12085 }
12086 }
12087
12088 sreloc = elf_section_data (input_section)->sreloc;
12089 if (!htab->elf.dynamic_sections_created)
12090 sreloc = htab->reliplt;
12091 if (sreloc == NULL)
12092 abort ();
12093
12094 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12095 >= sreloc->size)
12096 abort ();
12097 loc = sreloc->contents;
12098 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12099 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12100
12101 /* If this reloc is against an external symbol, it will
12102 be computed at runtime, so there's no need to do
12103 anything now. However, for the sake of prelink ensure
12104 that the section contents are a known value. */
12105 if (! relocate)
12106 {
12107 unresolved_reloc = FALSE;
12108 /* The value chosen here is quite arbitrary as ld.so
12109 ignores section contents except for the special
12110 case of .opd where the contents might be accessed
12111 before relocation. Choose zero, as that won't
12112 cause reloc overflow. */
12113 relocation = 0;
12114 addend = 0;
12115 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12116 to improve backward compatibility with older
12117 versions of ld. */
12118 if (r_type == R_PPC64_ADDR64)
12119 addend = outrel.r_addend;
12120 /* Adjust pc_relative relocs to have zero in *r_offset. */
12121 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12122 addend = (input_section->output_section->vma
12123 + input_section->output_offset
12124 + rel->r_offset);
12125 }
12126 }
12127 break;
12128
12129 case R_PPC64_COPY:
12130 case R_PPC64_GLOB_DAT:
12131 case R_PPC64_JMP_SLOT:
12132 case R_PPC64_JMP_IREL:
12133 case R_PPC64_RELATIVE:
12134 /* We shouldn't ever see these dynamic relocs in relocatable
12135 files. */
12136 /* Fall through. */
12137
12138 case R_PPC64_PLTGOT16:
12139 case R_PPC64_PLTGOT16_DS:
12140 case R_PPC64_PLTGOT16_HA:
12141 case R_PPC64_PLTGOT16_HI:
12142 case R_PPC64_PLTGOT16_LO:
12143 case R_PPC64_PLTGOT16_LO_DS:
12144 case R_PPC64_PLTREL32:
12145 case R_PPC64_PLTREL64:
12146 /* These ones haven't been implemented yet. */
12147
12148 (*_bfd_error_handler)
12149 (_("%B: relocation %s is not supported for symbol %s."),
12150 input_bfd,
12151 ppc64_elf_howto_table[r_type]->name, sym_name);
12152
12153 bfd_set_error (bfd_error_invalid_operation);
12154 ret = FALSE;
12155 continue;
12156 }
12157
12158 /* Do any further special processing. */
12159 switch (r_type)
12160 {
12161 default:
12162 break;
12163
12164 case R_PPC64_ADDR16_HA:
12165 case R_PPC64_REL16_HA:
12166 case R_PPC64_ADDR16_HIGHERA:
12167 case R_PPC64_ADDR16_HIGHESTA:
12168 case R_PPC64_TOC16_HA:
12169 case R_PPC64_SECTOFF_HA:
12170 case R_PPC64_TPREL16_HA:
12171 case R_PPC64_DTPREL16_HA:
12172 case R_PPC64_TPREL16_HIGHER:
12173 case R_PPC64_TPREL16_HIGHERA:
12174 case R_PPC64_TPREL16_HIGHEST:
12175 case R_PPC64_TPREL16_HIGHESTA:
12176 case R_PPC64_DTPREL16_HIGHER:
12177 case R_PPC64_DTPREL16_HIGHERA:
12178 case R_PPC64_DTPREL16_HIGHEST:
12179 case R_PPC64_DTPREL16_HIGHESTA:
12180 /* It's just possible that this symbol is a weak symbol
12181 that's not actually defined anywhere. In that case,
12182 'sec' would be NULL, and we should leave the symbol
12183 alone (it will be set to zero elsewhere in the link). */
12184 if (sec == NULL)
12185 break;
12186 /* Fall thru */
12187
12188 case R_PPC64_GOT16_HA:
12189 case R_PPC64_PLTGOT16_HA:
12190 case R_PPC64_PLT16_HA:
12191 case R_PPC64_GOT_TLSGD16_HA:
12192 case R_PPC64_GOT_TLSLD16_HA:
12193 case R_PPC64_GOT_TPREL16_HA:
12194 case R_PPC64_GOT_DTPREL16_HA:
12195 /* Add 0x10000 if sign bit in 0:15 is set.
12196 Bits 0:15 are not used. */
12197 addend += 0x8000;
12198 break;
12199
12200 case R_PPC64_ADDR16_DS:
12201 case R_PPC64_ADDR16_LO_DS:
12202 case R_PPC64_GOT16_DS:
12203 case R_PPC64_GOT16_LO_DS:
12204 case R_PPC64_PLT16_LO_DS:
12205 case R_PPC64_SECTOFF_DS:
12206 case R_PPC64_SECTOFF_LO_DS:
12207 case R_PPC64_TOC16_DS:
12208 case R_PPC64_TOC16_LO_DS:
12209 case R_PPC64_PLTGOT16_DS:
12210 case R_PPC64_PLTGOT16_LO_DS:
12211 case R_PPC64_GOT_TPREL16_DS:
12212 case R_PPC64_GOT_TPREL16_LO_DS:
12213 case R_PPC64_GOT_DTPREL16_DS:
12214 case R_PPC64_GOT_DTPREL16_LO_DS:
12215 case R_PPC64_TPREL16_DS:
12216 case R_PPC64_TPREL16_LO_DS:
12217 case R_PPC64_DTPREL16_DS:
12218 case R_PPC64_DTPREL16_LO_DS:
12219 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
12220 mask = 3;
12221 /* If this reloc is against an lq insn, then the value must be
12222 a multiple of 16. This is somewhat of a hack, but the
12223 "correct" way to do this by defining _DQ forms of all the
12224 _DS relocs bloats all reloc switches in this file. It
12225 doesn't seem to make much sense to use any of these relocs
12226 in data, so testing the insn should be safe. */
12227 if ((insn & (0x3f << 26)) == (56u << 26))
12228 mask = 15;
12229 if (((relocation + addend) & mask) != 0)
12230 {
12231 (*_bfd_error_handler)
12232 (_("%B: error: relocation %s not a multiple of %d"),
12233 input_bfd,
12234 ppc64_elf_howto_table[r_type]->name,
12235 mask + 1);
12236 bfd_set_error (bfd_error_bad_value);
12237 ret = FALSE;
12238 continue;
12239 }
12240 break;
12241 }
12242
12243 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
12244 because such sections are not SEC_ALLOC and thus ld.so will
12245 not process them. */
12246 if (unresolved_reloc
12247 && !((input_section->flags & SEC_DEBUGGING) != 0
12248 && h->elf.def_dynamic))
12249 {
12250 (*_bfd_error_handler)
12251 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
12252 input_bfd,
12253 input_section,
12254 (long) rel->r_offset,
12255 ppc64_elf_howto_table[(int) r_type]->name,
12256 h->elf.root.root.string);
12257 ret = FALSE;
12258 }
12259
12260 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
12261 input_bfd,
12262 input_section,
12263 contents,
12264 rel->r_offset,
12265 relocation,
12266 addend);
12267
12268 if (r != bfd_reloc_ok)
12269 {
12270 if (sym_name == NULL)
12271 sym_name = "(null)";
12272 if (r == bfd_reloc_overflow)
12273 {
12274 if (warned)
12275 continue;
12276 if (h != NULL
12277 && h->elf.root.type == bfd_link_hash_undefweak
12278 && ppc64_elf_howto_table[r_type]->pc_relative)
12279 {
12280 /* Assume this is a call protected by other code that
12281 detects the symbol is undefined. If this is the case,
12282 we can safely ignore the overflow. If not, the
12283 program is hosed anyway, and a little warning isn't
12284 going to help. */
12285
12286 continue;
12287 }
12288
12289 if (!((*info->callbacks->reloc_overflow)
12290 (info, (h ? &h->elf.root : NULL), sym_name,
12291 ppc64_elf_howto_table[r_type]->name,
12292 orig_addend, input_bfd, input_section, rel->r_offset)))
12293 return FALSE;
12294 }
12295 else
12296 {
12297 (*_bfd_error_handler)
12298 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
12299 input_bfd,
12300 input_section,
12301 (long) rel->r_offset,
12302 ppc64_elf_howto_table[r_type]->name,
12303 sym_name,
12304 (int) r);
12305 ret = FALSE;
12306 }
12307 }
12308 }
12309
12310 /* If we're emitting relocations, then shortly after this function
12311 returns, reloc offsets and addends for this section will be
12312 adjusted. Worse, reloc symbol indices will be for the output
12313 file rather than the input. Save a copy of the relocs for
12314 opd_entry_value. */
12315 if (is_opd && (info->emitrelocations || info->relocatable))
12316 {
12317 bfd_size_type amt;
12318 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
12319 rel = bfd_alloc (input_bfd, amt);
12320 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
12321 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
12322 if (rel == NULL)
12323 return FALSE;
12324 memcpy (rel, relocs, amt);
12325 }
12326 return ret;
12327 }
12328
12329 /* Adjust the value of any local symbols in opd sections. */
12330
12331 static int
12332 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
12333 const char *name ATTRIBUTE_UNUSED,
12334 Elf_Internal_Sym *elfsym,
12335 asection *input_sec,
12336 struct elf_link_hash_entry *h)
12337 {
12338 struct _opd_sec_data *opd;
12339 long adjust;
12340 bfd_vma value;
12341
12342 if (h != NULL)
12343 return 1;
12344
12345 opd = get_opd_info (input_sec);
12346 if (opd == NULL || opd->adjust == NULL)
12347 return 1;
12348
12349 value = elfsym->st_value - input_sec->output_offset;
12350 if (!info->relocatable)
12351 value -= input_sec->output_section->vma;
12352
12353 adjust = opd->adjust[value / 8];
12354 if (adjust == -1)
12355 return 2;
12356
12357 elfsym->st_value += adjust;
12358 return 1;
12359 }
12360
12361 /* Finish up dynamic symbol handling. We set the contents of various
12362 dynamic sections here. */
12363
12364 static bfd_boolean
12365 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
12366 struct bfd_link_info *info,
12367 struct elf_link_hash_entry *h,
12368 Elf_Internal_Sym *sym)
12369 {
12370 struct ppc_link_hash_table *htab;
12371 struct plt_entry *ent;
12372 Elf_Internal_Rela rela;
12373 bfd_byte *loc;
12374
12375 htab = ppc_hash_table (info);
12376
12377 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
12378 if (ent->plt.offset != (bfd_vma) -1)
12379 {
12380 /* This symbol has an entry in the procedure linkage
12381 table. Set it up. */
12382 if (!htab->elf.dynamic_sections_created
12383 || h->dynindx == -1)
12384 {
12385 BFD_ASSERT (h->type == STT_GNU_IFUNC
12386 && h->def_regular
12387 && (h->root.type == bfd_link_hash_defined
12388 || h->root.type == bfd_link_hash_defweak));
12389 rela.r_offset = (htab->iplt->output_section->vma
12390 + htab->iplt->output_offset
12391 + ent->plt.offset);
12392 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
12393 rela.r_addend = (h->root.u.def.value
12394 + h->root.u.def.section->output_offset
12395 + h->root.u.def.section->output_section->vma
12396 + ent->addend);
12397 loc = (htab->reliplt->contents
12398 + (htab->reliplt->reloc_count++
12399 * sizeof (Elf64_External_Rela)));
12400 }
12401 else
12402 {
12403 rela.r_offset = (htab->plt->output_section->vma
12404 + htab->plt->output_offset
12405 + ent->plt.offset);
12406 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
12407 rela.r_addend = ent->addend;
12408 loc = (htab->relplt->contents
12409 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
12410 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
12411 }
12412 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12413 }
12414
12415 if (h->needs_copy)
12416 {
12417 Elf_Internal_Rela rela;
12418 bfd_byte *loc;
12419
12420 /* This symbol needs a copy reloc. Set it up. */
12421
12422 if (h->dynindx == -1
12423 || (h->root.type != bfd_link_hash_defined
12424 && h->root.type != bfd_link_hash_defweak)
12425 || htab->relbss == NULL)
12426 abort ();
12427
12428 rela.r_offset = (h->root.u.def.value
12429 + h->root.u.def.section->output_section->vma
12430 + h->root.u.def.section->output_offset);
12431 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
12432 rela.r_addend = 0;
12433 loc = htab->relbss->contents;
12434 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
12435 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12436 }
12437
12438 /* Mark some specially defined symbols as absolute. */
12439 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
12440 sym->st_shndx = SHN_ABS;
12441
12442 return TRUE;
12443 }
12444
12445 /* Used to decide how to sort relocs in an optimal manner for the
12446 dynamic linker, before writing them out. */
12447
12448 static enum elf_reloc_type_class
12449 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
12450 {
12451 enum elf_ppc64_reloc_type r_type;
12452
12453 r_type = ELF64_R_TYPE (rela->r_info);
12454 switch (r_type)
12455 {
12456 case R_PPC64_RELATIVE:
12457 return reloc_class_relative;
12458 case R_PPC64_JMP_SLOT:
12459 return reloc_class_plt;
12460 case R_PPC64_COPY:
12461 return reloc_class_copy;
12462 default:
12463 return reloc_class_normal;
12464 }
12465 }
12466
12467 /* Finish up the dynamic sections. */
12468
12469 static bfd_boolean
12470 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
12471 struct bfd_link_info *info)
12472 {
12473 struct ppc_link_hash_table *htab;
12474 bfd *dynobj;
12475 asection *sdyn;
12476
12477 htab = ppc_hash_table (info);
12478 dynobj = htab->elf.dynobj;
12479 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
12480
12481 if (htab->elf.dynamic_sections_created)
12482 {
12483 Elf64_External_Dyn *dyncon, *dynconend;
12484
12485 if (sdyn == NULL || htab->got == NULL)
12486 abort ();
12487
12488 dyncon = (Elf64_External_Dyn *) sdyn->contents;
12489 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
12490 for (; dyncon < dynconend; dyncon++)
12491 {
12492 Elf_Internal_Dyn dyn;
12493 asection *s;
12494
12495 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
12496
12497 switch (dyn.d_tag)
12498 {
12499 default:
12500 continue;
12501
12502 case DT_PPC64_GLINK:
12503 s = htab->glink;
12504 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12505 /* We stupidly defined DT_PPC64_GLINK to be the start
12506 of glink rather than the first entry point, which is
12507 what ld.so needs, and now have a bigger stub to
12508 support automatic multiple TOCs. */
12509 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
12510 break;
12511
12512 case DT_PPC64_OPD:
12513 s = bfd_get_section_by_name (output_bfd, ".opd");
12514 if (s == NULL)
12515 continue;
12516 dyn.d_un.d_ptr = s->vma;
12517 break;
12518
12519 case DT_PPC64_OPDSZ:
12520 s = bfd_get_section_by_name (output_bfd, ".opd");
12521 if (s == NULL)
12522 continue;
12523 dyn.d_un.d_val = s->size;
12524 break;
12525
12526 case DT_PLTGOT:
12527 s = htab->plt;
12528 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12529 break;
12530
12531 case DT_JMPREL:
12532 s = htab->relplt;
12533 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12534 break;
12535
12536 case DT_PLTRELSZ:
12537 dyn.d_un.d_val = htab->relplt->size;
12538 break;
12539
12540 case DT_RELASZ:
12541 /* Don't count procedure linkage table relocs in the
12542 overall reloc count. */
12543 s = htab->relplt;
12544 if (s == NULL)
12545 continue;
12546 dyn.d_un.d_val -= s->size;
12547 break;
12548
12549 case DT_RELA:
12550 /* We may not be using the standard ELF linker script.
12551 If .rela.plt is the first .rela section, we adjust
12552 DT_RELA to not include it. */
12553 s = htab->relplt;
12554 if (s == NULL)
12555 continue;
12556 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
12557 continue;
12558 dyn.d_un.d_ptr += s->size;
12559 break;
12560 }
12561
12562 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
12563 }
12564 }
12565
12566 if (htab->got != NULL && htab->got->size != 0)
12567 {
12568 /* Fill in the first entry in the global offset table.
12569 We use it to hold the link-time TOCbase. */
12570 bfd_put_64 (output_bfd,
12571 elf_gp (output_bfd) + TOC_BASE_OFF,
12572 htab->got->contents);
12573
12574 /* Set .got entry size. */
12575 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
12576 }
12577
12578 if (htab->plt != NULL && htab->plt->size != 0)
12579 {
12580 /* Set .plt entry size. */
12581 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
12582 = PLT_ENTRY_SIZE;
12583 }
12584
12585 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
12586 brlt ourselves if emitrelocations. */
12587 if (htab->brlt != NULL
12588 && htab->brlt->reloc_count != 0
12589 && !_bfd_elf_link_output_relocs (output_bfd,
12590 htab->brlt,
12591 &elf_section_data (htab->brlt)->rel_hdr,
12592 elf_section_data (htab->brlt)->relocs,
12593 NULL))
12594 return FALSE;
12595
12596 if (htab->glink != NULL
12597 && htab->glink->reloc_count != 0
12598 && !_bfd_elf_link_output_relocs (output_bfd,
12599 htab->glink,
12600 &elf_section_data (htab->glink)->rel_hdr,
12601 elf_section_data (htab->glink)->relocs,
12602 NULL))
12603 return FALSE;
12604
12605 /* We need to handle writing out multiple GOT sections ourselves,
12606 since we didn't add them to DYNOBJ. We know dynobj is the first
12607 bfd. */
12608 while ((dynobj = dynobj->link_next) != NULL)
12609 {
12610 asection *s;
12611
12612 if (!is_ppc64_elf (dynobj))
12613 continue;
12614
12615 s = ppc64_elf_tdata (dynobj)->got;
12616 if (s != NULL
12617 && s->size != 0
12618 && s->output_section != bfd_abs_section_ptr
12619 && !bfd_set_section_contents (output_bfd, s->output_section,
12620 s->contents, s->output_offset,
12621 s->size))
12622 return FALSE;
12623 s = ppc64_elf_tdata (dynobj)->relgot;
12624 if (s != NULL
12625 && s->size != 0
12626 && s->output_section != bfd_abs_section_ptr
12627 && !bfd_set_section_contents (output_bfd, s->output_section,
12628 s->contents, s->output_offset,
12629 s->size))
12630 return FALSE;
12631 }
12632
12633 return TRUE;
12634 }
12635
12636 #include "elf64-target.h"
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