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* gas/elf/dwarf2-4.s: Don't use @.
[binutils.git] / bfd / elf64-ppc.c
blob25d0d2efee6bb202cf2e0b6a85215814ccca4e80
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x1000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_can_gc_sections 1
76 #define elf_backend_can_refcount 1
77 #define elf_backend_rela_normal 1
78 #define elf_backend_default_execstack 0
79
80 #define bfd_elf64_mkobject ppc64_elf_mkobject
81 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
85 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
86 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
87 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88
89 #define elf_backend_object_p ppc64_elf_object_p
90 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
91 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
92 #define elf_backend_write_core_note ppc64_elf_write_core_note
93 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
94 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
95 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
96 #define elf_backend_check_directives ppc64_elf_process_dot_syms
97 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
98 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
99 #define elf_backend_check_relocs ppc64_elf_check_relocs
100 #define elf_backend_gc_keep ppc64_elf_gc_keep
101 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
102 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
103 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
104 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
105 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
106 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
107 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
108 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
109 #define elf_backend_action_discarded ppc64_elf_action_discarded
110 #define elf_backend_relocate_section ppc64_elf_relocate_section
111 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
112 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
113 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
114 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
115 #define elf_backend_special_sections ppc64_elf_special_sections
116 #define elf_backend_post_process_headers _bfd_elf_set_osabi
117
118 /* The name of the dynamic interpreter. This is put in the .interp
119 section. */
120 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
121
122 /* The size in bytes of an entry in the procedure linkage table. */
123 #define PLT_ENTRY_SIZE 24
124
125 /* The initial size of the plt reserved for the dynamic linker. */
126 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
127
128 /* TOC base pointers offset from start of TOC. */
129 #define TOC_BASE_OFF 0x8000
130
131 /* Offset of tp and dtp pointers from start of TLS block. */
132 #define TP_OFFSET 0x7000
133 #define DTP_OFFSET 0x8000
134
135 /* .plt call stub instructions. The normal stub is like this, but
136 sometimes the .plt entry crosses a 64k boundary and we need to
137 insert an addi to adjust r12. */
138 #define PLT_CALL_STUB_SIZE (7*4)
139 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
140 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
141 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
142 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
143 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
144 /* ld %r11,xxx+16@l(%r12) */
145 #define BCTR 0x4e800420 /* bctr */
146
147
148 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
149 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
150 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
151 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
152
153 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
154 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
155
156 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
157
158 /* glink call stub instructions. We enter with the index in R0. */
159 #define GLINK_CALL_STUB_SIZE (16*4)
160 /* 0: */
161 /* .quad plt0-1f */
162 /* __glink: */
163 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
164 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
165 /* 1: */
166 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
167 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
168 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
169 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
170 /* ld %11,0(%12) */
171 /* ld %2,8(%12) */
172 /* mtctr %11 */
173 /* ld %11,16(%12) */
174 /* bctr */
175
176 /* Pad with this. */
177 #define NOP 0x60000000
178
179 /* Some other nops. */
180 #define CROR_151515 0x4def7b82
181 #define CROR_313131 0x4ffffb82
182
183 /* .glink entries for the first 32k functions are two instructions. */
184 #define LI_R0_0 0x38000000 /* li %r0,0 */
185 #define B_DOT 0x48000000 /* b . */
186
187 /* After that, we need two instructions to load the index, followed by
188 a branch. */
189 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
190 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
191
192 /* Instructions used by the save and restore reg functions. */
193 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
194 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
195 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
196 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
197 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
198 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
199 #define LI_R12_0 0x39800000 /* li %r12,0 */
200 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
201 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
202 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
203 #define BLR 0x4e800020 /* blr */
204
205 /* Since .opd is an array of descriptors and each entry will end up
206 with identical R_PPC64_RELATIVE relocs, there is really no need to
207 propagate .opd relocs; The dynamic linker should be taught to
208 relocate .opd without reloc entries. */
209 #ifndef NO_OPD_RELOCS
210 #define NO_OPD_RELOCS 0
211 #endif
212 \f
213 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
214
215 /* Relocation HOWTO's. */
216 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
217
218 static reloc_howto_type ppc64_elf_howto_raw[] = {
219 /* This reloc does nothing. */
220 HOWTO (R_PPC64_NONE, /* type */
221 0, /* rightshift */
222 2, /* size (0 = byte, 1 = short, 2 = long) */
223 32, /* bitsize */
224 FALSE, /* pc_relative */
225 0, /* bitpos */
226 complain_overflow_dont, /* complain_on_overflow */
227 bfd_elf_generic_reloc, /* special_function */
228 "R_PPC64_NONE", /* name */
229 FALSE, /* partial_inplace */
230 0, /* src_mask */
231 0, /* dst_mask */
232 FALSE), /* pcrel_offset */
233
234 /* A standard 32 bit relocation. */
235 HOWTO (R_PPC64_ADDR32, /* type */
236 0, /* rightshift */
237 2, /* size (0 = byte, 1 = short, 2 = long) */
238 32, /* bitsize */
239 FALSE, /* pc_relative */
240 0, /* bitpos */
241 complain_overflow_bitfield, /* complain_on_overflow */
242 bfd_elf_generic_reloc, /* special_function */
243 "R_PPC64_ADDR32", /* name */
244 FALSE, /* partial_inplace */
245 0, /* src_mask */
246 0xffffffff, /* dst_mask */
247 FALSE), /* pcrel_offset */
248
249 /* An absolute 26 bit branch; the lower two bits must be zero.
250 FIXME: we don't check that, we just clear them. */
251 HOWTO (R_PPC64_ADDR24, /* type */
252 0, /* rightshift */
253 2, /* size (0 = byte, 1 = short, 2 = long) */
254 26, /* bitsize */
255 FALSE, /* pc_relative */
256 0, /* bitpos */
257 complain_overflow_bitfield, /* complain_on_overflow */
258 bfd_elf_generic_reloc, /* special_function */
259 "R_PPC64_ADDR24", /* name */
260 FALSE, /* partial_inplace */
261 0, /* src_mask */
262 0x03fffffc, /* dst_mask */
263 FALSE), /* pcrel_offset */
264
265 /* A standard 16 bit relocation. */
266 HOWTO (R_PPC64_ADDR16, /* type */
267 0, /* rightshift */
268 1, /* size (0 = byte, 1 = short, 2 = long) */
269 16, /* bitsize */
270 FALSE, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_bitfield, /* complain_on_overflow */
273 bfd_elf_generic_reloc, /* special_function */
274 "R_PPC64_ADDR16", /* name */
275 FALSE, /* partial_inplace */
276 0, /* src_mask */
277 0xffff, /* dst_mask */
278 FALSE), /* pcrel_offset */
279
280 /* A 16 bit relocation without overflow. */
281 HOWTO (R_PPC64_ADDR16_LO, /* type */
282 0, /* rightshift */
283 1, /* size (0 = byte, 1 = short, 2 = long) */
284 16, /* bitsize */
285 FALSE, /* pc_relative */
286 0, /* bitpos */
287 complain_overflow_dont,/* complain_on_overflow */
288 bfd_elf_generic_reloc, /* special_function */
289 "R_PPC64_ADDR16_LO", /* name */
290 FALSE, /* partial_inplace */
291 0, /* src_mask */
292 0xffff, /* dst_mask */
293 FALSE), /* pcrel_offset */
294
295 /* Bits 16-31 of an address. */
296 HOWTO (R_PPC64_ADDR16_HI, /* type */
297 16, /* rightshift */
298 1, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_dont, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC64_ADDR16_HI", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xffff, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
311 bits, treated as a signed number, is negative. */
312 HOWTO (R_PPC64_ADDR16_HA, /* type */
313 16, /* rightshift */
314 1, /* size (0 = byte, 1 = short, 2 = long) */
315 16, /* bitsize */
316 FALSE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_dont, /* complain_on_overflow */
319 ppc64_elf_ha_reloc, /* special_function */
320 "R_PPC64_ADDR16_HA", /* name */
321 FALSE, /* partial_inplace */
322 0, /* src_mask */
323 0xffff, /* dst_mask */
324 FALSE), /* pcrel_offset */
325
326 /* An absolute 16 bit branch; the lower two bits must be zero.
327 FIXME: we don't check that, we just clear them. */
328 HOWTO (R_PPC64_ADDR14, /* type */
329 0, /* rightshift */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
331 16, /* bitsize */
332 FALSE, /* pc_relative */
333 0, /* bitpos */
334 complain_overflow_bitfield, /* complain_on_overflow */
335 ppc64_elf_branch_reloc, /* special_function */
336 "R_PPC64_ADDR14", /* name */
337 FALSE, /* partial_inplace */
338 0, /* src_mask */
339 0x0000fffc, /* dst_mask */
340 FALSE), /* pcrel_offset */
341
342 /* An absolute 16 bit branch, for which bit 10 should be set to
343 indicate that the branch is expected to be taken. The lower two
344 bits must be zero. */
345 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 16, /* bitsize */
349 FALSE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_bitfield, /* complain_on_overflow */
352 ppc64_elf_brtaken_reloc, /* special_function */
353 "R_PPC64_ADDR14_BRTAKEN",/* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x0000fffc, /* dst_mask */
357 FALSE), /* pcrel_offset */
358
359 /* An absolute 16 bit branch, for which bit 10 should be set to
360 indicate that the branch is not expected to be taken. The lower
361 two bits must be zero. */
362 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
363 0, /* rightshift */
364 2, /* size (0 = byte, 1 = short, 2 = long) */
365 16, /* bitsize */
366 FALSE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_bitfield, /* complain_on_overflow */
369 ppc64_elf_brtaken_reloc, /* special_function */
370 "R_PPC64_ADDR14_BRNTAKEN",/* name */
371 FALSE, /* partial_inplace */
372 0, /* src_mask */
373 0x0000fffc, /* dst_mask */
374 FALSE), /* pcrel_offset */
375
376 /* A relative 26 bit branch; the lower two bits must be zero. */
377 HOWTO (R_PPC64_REL24, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 26, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_REL24", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x03fffffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch; the lower two bits must be zero. */
392 HOWTO (R_PPC64_REL14, /* type */
393 0, /* rightshift */
394 2, /* size (0 = byte, 1 = short, 2 = long) */
395 16, /* bitsize */
396 TRUE, /* pc_relative */
397 0, /* bitpos */
398 complain_overflow_signed, /* complain_on_overflow */
399 ppc64_elf_branch_reloc, /* special_function */
400 "R_PPC64_REL14", /* name */
401 FALSE, /* partial_inplace */
402 0, /* src_mask */
403 0x0000fffc, /* dst_mask */
404 TRUE), /* pcrel_offset */
405
406 /* A relative 16 bit branch. Bit 10 should be set to indicate that
407 the branch is expected to be taken. The lower two bits must be
408 zero. */
409 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
410 0, /* rightshift */
411 2, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 TRUE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_signed, /* complain_on_overflow */
416 ppc64_elf_brtaken_reloc, /* special_function */
417 "R_PPC64_REL14_BRTAKEN", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0x0000fffc, /* dst_mask */
421 TRUE), /* pcrel_offset */
422
423 /* A relative 16 bit branch. Bit 10 should be set to indicate that
424 the branch is not expected to be taken. The lower two bits must
425 be zero. */
426 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
427 0, /* rightshift */
428 2, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 TRUE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_signed, /* complain_on_overflow */
433 ppc64_elf_brtaken_reloc, /* special_function */
434 "R_PPC64_REL14_BRNTAKEN",/* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0x0000fffc, /* dst_mask */
438 TRUE), /* pcrel_offset */
439
440 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
441 symbol. */
442 HOWTO (R_PPC64_GOT16, /* type */
443 0, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_signed, /* complain_on_overflow */
449 ppc64_elf_unhandled_reloc, /* special_function */
450 "R_PPC64_GOT16", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC64_GOT16_LO, /* type */
459 0, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc64_elf_unhandled_reloc, /* special_function */
466 "R_PPC64_GOT16_LO", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
473 the symbol. */
474 HOWTO (R_PPC64_GOT16_HI, /* type */
475 16, /* rightshift */
476 1, /* size (0 = byte, 1 = short, 2 = long) */
477 16, /* bitsize */
478 FALSE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_dont,/* complain_on_overflow */
481 ppc64_elf_unhandled_reloc, /* special_function */
482 "R_PPC64_GOT16_HI", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0xffff, /* dst_mask */
486 FALSE), /* pcrel_offset */
487
488 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
489 the symbol. */
490 HOWTO (R_PPC64_GOT16_HA, /* type */
491 16, /* rightshift */
492 1, /* size (0 = byte, 1 = short, 2 = long) */
493 16, /* bitsize */
494 FALSE, /* pc_relative */
495 0, /* bitpos */
496 complain_overflow_dont,/* complain_on_overflow */
497 ppc64_elf_unhandled_reloc, /* special_function */
498 "R_PPC64_GOT16_HA", /* name */
499 FALSE, /* partial_inplace */
500 0, /* src_mask */
501 0xffff, /* dst_mask */
502 FALSE), /* pcrel_offset */
503
504 /* This is used only by the dynamic linker. The symbol should exist
505 both in the object being run and in some shared library. The
506 dynamic linker copies the data addressed by the symbol from the
507 shared library into the object, because the object being
508 run has to have the data at some particular address. */
509 HOWTO (R_PPC64_COPY, /* type */
510 0, /* rightshift */
511 0, /* this one is variable size */
512 0, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 ppc64_elf_unhandled_reloc, /* special_function */
517 "R_PPC64_COPY", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Like R_PPC64_ADDR64, but used when setting global offset table
524 entries. */
525 HOWTO (R_PPC64_GLOB_DAT, /* type */
526 0, /* rightshift */
527 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
528 64, /* bitsize */
529 FALSE, /* pc_relative */
530 0, /* bitpos */
531 complain_overflow_dont, /* complain_on_overflow */
532 ppc64_elf_unhandled_reloc, /* special_function */
533 "R_PPC64_GLOB_DAT", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 ONES (64), /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 /* Created by the link editor. Marks a procedure linkage table
540 entry for a symbol. */
541 HOWTO (R_PPC64_JMP_SLOT, /* type */
542 0, /* rightshift */
543 0, /* size (0 = byte, 1 = short, 2 = long) */
544 0, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 ppc64_elf_unhandled_reloc, /* special_function */
549 "R_PPC64_JMP_SLOT", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Used only by the dynamic linker. When the object is run, this
556 doubleword64 is set to the load address of the object, plus the
557 addend. */
558 HOWTO (R_PPC64_RELATIVE, /* type */
559 0, /* rightshift */
560 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
561 64, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_dont, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC64_RELATIVE", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 ONES (64), /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC64_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_bitfield, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC64_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC64_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC64_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC64_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative. */
603 HOWTO (R_PPC64_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 /* FIXME: Verify. Was complain_overflow_bitfield. */
610 complain_overflow_signed, /* complain_on_overflow */
611 bfd_elf_generic_reloc, /* special_function */
612 "R_PPC64_REL32", /* name */
613 FALSE, /* partial_inplace */
614 0, /* src_mask */
615 0xffffffff, /* dst_mask */
616 TRUE), /* pcrel_offset */
617
618 /* 32-bit relocation to the symbol's procedure linkage table. */
619 HOWTO (R_PPC64_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_bitfield, /* complain_on_overflow */
626 ppc64_elf_unhandled_reloc, /* special_function */
627 "R_PPC64_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0xffffffff, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: R_PPC64_PLTREL32 not supported. */
635 HOWTO (R_PPC64_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_signed, /* complain_on_overflow */
642 bfd_elf_generic_reloc, /* special_function */
643 "R_PPC64_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0xffffffff, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC64_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 ppc64_elf_unhandled_reloc, /* special_function */
659 "R_PPC64_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC64_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 ppc64_elf_unhandled_reloc, /* special_function */
675 "R_PPC64_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC64_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc64_elf_unhandled_reloc, /* special_function */
691 "R_PPC64_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* 16-bit section relative relocation. */
698 HOWTO (R_PPC64_SECTOFF, /* type */
699 0, /* rightshift */
700 1, /* size (0 = byte, 1 = short, 2 = long) */
701 16, /* bitsize */
702 FALSE, /* pc_relative */
703 0, /* bitpos */
704 complain_overflow_bitfield, /* complain_on_overflow */
705 ppc64_elf_sectoff_reloc, /* special_function */
706 "R_PPC64_SECTOFF", /* name */
707 FALSE, /* partial_inplace */
708 0, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE), /* pcrel_offset */
711
712 /* Like R_PPC64_SECTOFF, but no overflow warning. */
713 HOWTO (R_PPC64_SECTOFF_LO, /* type */
714 0, /* rightshift */
715 1, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 FALSE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_dont, /* complain_on_overflow */
720 ppc64_elf_sectoff_reloc, /* special_function */
721 "R_PPC64_SECTOFF_LO", /* name */
722 FALSE, /* partial_inplace */
723 0, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE), /* pcrel_offset */
726
727 /* 16-bit upper half section relative relocation. */
728 HOWTO (R_PPC64_SECTOFF_HI, /* type */
729 16, /* rightshift */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
731 16, /* bitsize */
732 FALSE, /* pc_relative */
733 0, /* bitpos */
734 complain_overflow_dont, /* complain_on_overflow */
735 ppc64_elf_sectoff_reloc, /* special_function */
736 "R_PPC64_SECTOFF_HI", /* name */
737 FALSE, /* partial_inplace */
738 0, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE), /* pcrel_offset */
741
742 /* 16-bit upper half adjusted section relative relocation. */
743 HOWTO (R_PPC64_SECTOFF_HA, /* type */
744 16, /* rightshift */
745 1, /* size (0 = byte, 1 = short, 2 = long) */
746 16, /* bitsize */
747 FALSE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 ppc64_elf_sectoff_ha_reloc, /* special_function */
751 "R_PPC64_SECTOFF_HA", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 0xffff, /* dst_mask */
755 FALSE), /* pcrel_offset */
756
757 /* Like R_PPC64_REL24 without touching the two least significant bits. */
758 HOWTO (R_PPC64_REL30, /* type */
759 2, /* rightshift */
760 2, /* size (0 = byte, 1 = short, 2 = long) */
761 30, /* bitsize */
762 TRUE, /* pc_relative */
763 0, /* bitpos */
764 complain_overflow_dont, /* complain_on_overflow */
765 bfd_elf_generic_reloc, /* special_function */
766 "R_PPC64_REL30", /* name */
767 FALSE, /* partial_inplace */
768 0, /* src_mask */
769 0xfffffffc, /* dst_mask */
770 TRUE), /* pcrel_offset */
771
772 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
773
774 /* A standard 64-bit relocation. */
775 HOWTO (R_PPC64_ADDR64, /* type */
776 0, /* rightshift */
777 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
778 64, /* bitsize */
779 FALSE, /* pc_relative */
780 0, /* bitpos */
781 complain_overflow_dont, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 "R_PPC64_ADDR64", /* name */
784 FALSE, /* partial_inplace */
785 0, /* src_mask */
786 ONES (64), /* dst_mask */
787 FALSE), /* pcrel_offset */
788
789 /* The bits 32-47 of an address. */
790 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
791 32, /* rightshift */
792 1, /* size (0 = byte, 1 = short, 2 = long) */
793 16, /* bitsize */
794 FALSE, /* pc_relative */
795 0, /* bitpos */
796 complain_overflow_dont, /* complain_on_overflow */
797 bfd_elf_generic_reloc, /* special_function */
798 "R_PPC64_ADDR16_HIGHER", /* name */
799 FALSE, /* partial_inplace */
800 0, /* src_mask */
801 0xffff, /* dst_mask */
802 FALSE), /* pcrel_offset */
803
804 /* The bits 32-47 of an address, plus 1 if the contents of the low
805 16 bits, treated as a signed number, is negative. */
806 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
807 32, /* rightshift */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
809 16, /* bitsize */
810 FALSE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 ppc64_elf_ha_reloc, /* special_function */
814 "R_PPC64_ADDR16_HIGHERA", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 /* The bits 48-63 of an address. */
821 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
822 48, /* rightshift */
823 1, /* size (0 = byte, 1 = short, 2 = long) */
824 16, /* bitsize */
825 FALSE, /* pc_relative */
826 0, /* bitpos */
827 complain_overflow_dont, /* complain_on_overflow */
828 bfd_elf_generic_reloc, /* special_function */
829 "R_PPC64_ADDR16_HIGHEST", /* name */
830 FALSE, /* partial_inplace */
831 0, /* src_mask */
832 0xffff, /* dst_mask */
833 FALSE), /* pcrel_offset */
834
835 /* The bits 48-63 of an address, plus 1 if the contents of the low
836 16 bits, treated as a signed number, is negative. */
837 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
838 48, /* rightshift */
839 1, /* size (0 = byte, 1 = short, 2 = long) */
840 16, /* bitsize */
841 FALSE, /* pc_relative */
842 0, /* bitpos */
843 complain_overflow_dont, /* complain_on_overflow */
844 ppc64_elf_ha_reloc, /* special_function */
845 "R_PPC64_ADDR16_HIGHESTA", /* name */
846 FALSE, /* partial_inplace */
847 0, /* src_mask */
848 0xffff, /* dst_mask */
849 FALSE), /* pcrel_offset */
850
851 /* Like ADDR64, but may be unaligned. */
852 HOWTO (R_PPC64_UADDR64, /* type */
853 0, /* rightshift */
854 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
855 64, /* bitsize */
856 FALSE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont, /* complain_on_overflow */
859 bfd_elf_generic_reloc, /* special_function */
860 "R_PPC64_UADDR64", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 ONES (64), /* dst_mask */
864 FALSE), /* pcrel_offset */
865
866 /* 64-bit relative relocation. */
867 HOWTO (R_PPC64_REL64, /* type */
868 0, /* rightshift */
869 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
870 64, /* bitsize */
871 TRUE, /* pc_relative */
872 0, /* bitpos */
873 complain_overflow_dont, /* complain_on_overflow */
874 bfd_elf_generic_reloc, /* special_function */
875 "R_PPC64_REL64", /* name */
876 FALSE, /* partial_inplace */
877 0, /* src_mask */
878 ONES (64), /* dst_mask */
879 TRUE), /* pcrel_offset */
880
881 /* 64-bit relocation to the symbol's procedure linkage table. */
882 HOWTO (R_PPC64_PLT64, /* type */
883 0, /* rightshift */
884 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
885 64, /* bitsize */
886 FALSE, /* pc_relative */
887 0, /* bitpos */
888 complain_overflow_dont, /* complain_on_overflow */
889 ppc64_elf_unhandled_reloc, /* special_function */
890 "R_PPC64_PLT64", /* name */
891 FALSE, /* partial_inplace */
892 0, /* src_mask */
893 ONES (64), /* dst_mask */
894 FALSE), /* pcrel_offset */
895
896 /* 64-bit PC relative relocation to the symbol's procedure linkage
897 table. */
898 /* FIXME: R_PPC64_PLTREL64 not supported. */
899 HOWTO (R_PPC64_PLTREL64, /* type */
900 0, /* rightshift */
901 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
902 64, /* bitsize */
903 TRUE, /* pc_relative */
904 0, /* bitpos */
905 complain_overflow_dont, /* complain_on_overflow */
906 ppc64_elf_unhandled_reloc, /* special_function */
907 "R_PPC64_PLTREL64", /* name */
908 FALSE, /* partial_inplace */
909 0, /* src_mask */
910 ONES (64), /* dst_mask */
911 TRUE), /* pcrel_offset */
912
913 /* 16 bit TOC-relative relocation. */
914
915 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
916 HOWTO (R_PPC64_TOC16, /* type */
917 0, /* rightshift */
918 1, /* size (0 = byte, 1 = short, 2 = long) */
919 16, /* bitsize */
920 FALSE, /* pc_relative */
921 0, /* bitpos */
922 complain_overflow_signed, /* complain_on_overflow */
923 ppc64_elf_toc_reloc, /* special_function */
924 "R_PPC64_TOC16", /* name */
925 FALSE, /* partial_inplace */
926 0, /* src_mask */
927 0xffff, /* dst_mask */
928 FALSE), /* pcrel_offset */
929
930 /* 16 bit TOC-relative relocation without overflow. */
931
932 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
933 HOWTO (R_PPC64_TOC16_LO, /* type */
934 0, /* rightshift */
935 1, /* size (0 = byte, 1 = short, 2 = long) */
936 16, /* bitsize */
937 FALSE, /* pc_relative */
938 0, /* bitpos */
939 complain_overflow_dont, /* complain_on_overflow */
940 ppc64_elf_toc_reloc, /* special_function */
941 "R_PPC64_TOC16_LO", /* name */
942 FALSE, /* partial_inplace */
943 0, /* src_mask */
944 0xffff, /* dst_mask */
945 FALSE), /* pcrel_offset */
946
947 /* 16 bit TOC-relative relocation, high 16 bits. */
948
949 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
950 HOWTO (R_PPC64_TOC16_HI, /* type */
951 16, /* rightshift */
952 1, /* size (0 = byte, 1 = short, 2 = long) */
953 16, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_dont, /* complain_on_overflow */
957 ppc64_elf_toc_reloc, /* special_function */
958 "R_PPC64_TOC16_HI", /* name */
959 FALSE, /* partial_inplace */
960 0, /* src_mask */
961 0xffff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
965 contents of the low 16 bits, treated as a signed number, is
966 negative. */
967
968 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
969 HOWTO (R_PPC64_TOC16_HA, /* type */
970 16, /* rightshift */
971 1, /* size (0 = byte, 1 = short, 2 = long) */
972 16, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_dont, /* complain_on_overflow */
976 ppc64_elf_toc_ha_reloc, /* special_function */
977 "R_PPC64_TOC16_HA", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* 64-bit relocation; insert value of TOC base (.TOC.). */
984
985 /* R_PPC64_TOC 51 doubleword64 .TOC. */
986 HOWTO (R_PPC64_TOC, /* type */
987 0, /* rightshift */
988 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
989 64, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_bitfield, /* complain_on_overflow */
993 ppc64_elf_toc64_reloc, /* special_function */
994 "R_PPC64_TOC", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 ONES (64), /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* Like R_PPC64_GOT16, but also informs the link editor that the
1001 value to relocate may (!) refer to a PLT entry which the link
1002 editor (a) may replace with the symbol value. If the link editor
1003 is unable to fully resolve the symbol, it may (b) create a PLT
1004 entry and store the address to the new PLT entry in the GOT.
1005 This permits lazy resolution of function symbols at run time.
1006 The link editor may also skip all of this and just (c) emit a
1007 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1008 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1009 HOWTO (R_PPC64_PLTGOT16, /* type */
1010 0, /* rightshift */
1011 1, /* size (0 = byte, 1 = short, 2 = long) */
1012 16, /* bitsize */
1013 FALSE, /* pc_relative */
1014 0, /* bitpos */
1015 complain_overflow_signed, /* complain_on_overflow */
1016 ppc64_elf_unhandled_reloc, /* special_function */
1017 "R_PPC64_PLTGOT16", /* name */
1018 FALSE, /* partial_inplace */
1019 0, /* src_mask */
1020 0xffff, /* dst_mask */
1021 FALSE), /* pcrel_offset */
1022
1023 /* Like R_PPC64_PLTGOT16, but without overflow. */
1024 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1025 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1026 0, /* rightshift */
1027 1, /* size (0 = byte, 1 = short, 2 = long) */
1028 16, /* bitsize */
1029 FALSE, /* pc_relative */
1030 0, /* bitpos */
1031 complain_overflow_dont, /* complain_on_overflow */
1032 ppc64_elf_unhandled_reloc, /* special_function */
1033 "R_PPC64_PLTGOT16_LO", /* name */
1034 FALSE, /* partial_inplace */
1035 0, /* src_mask */
1036 0xffff, /* dst_mask */
1037 FALSE), /* pcrel_offset */
1038
1039 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1040 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1041 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1042 16, /* rightshift */
1043 1, /* size (0 = byte, 1 = short, 2 = long) */
1044 16, /* bitsize */
1045 FALSE, /* pc_relative */
1046 0, /* bitpos */
1047 complain_overflow_dont, /* complain_on_overflow */
1048 ppc64_elf_unhandled_reloc, /* special_function */
1049 "R_PPC64_PLTGOT16_HI", /* name */
1050 FALSE, /* partial_inplace */
1051 0, /* src_mask */
1052 0xffff, /* dst_mask */
1053 FALSE), /* pcrel_offset */
1054
1055 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1056 1 if the contents of the low 16 bits, treated as a signed number,
1057 is negative. */
1058 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1059 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1060 16, /* rightshift */
1061 1, /* size (0 = byte, 1 = short, 2 = long) */
1062 16, /* bitsize */
1063 FALSE, /* pc_relative */
1064 0, /* bitpos */
1065 complain_overflow_dont,/* complain_on_overflow */
1066 ppc64_elf_unhandled_reloc, /* special_function */
1067 "R_PPC64_PLTGOT16_HA", /* name */
1068 FALSE, /* partial_inplace */
1069 0, /* src_mask */
1070 0xffff, /* dst_mask */
1071 FALSE), /* pcrel_offset */
1072
1073 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1074 HOWTO (R_PPC64_ADDR16_DS, /* type */
1075 0, /* rightshift */
1076 1, /* size (0 = byte, 1 = short, 2 = long) */
1077 16, /* bitsize */
1078 FALSE, /* pc_relative */
1079 0, /* bitpos */
1080 complain_overflow_bitfield, /* complain_on_overflow */
1081 bfd_elf_generic_reloc, /* special_function */
1082 "R_PPC64_ADDR16_DS", /* name */
1083 FALSE, /* partial_inplace */
1084 0, /* src_mask */
1085 0xfffc, /* dst_mask */
1086 FALSE), /* pcrel_offset */
1087
1088 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1089 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1090 0, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_dont,/* complain_on_overflow */
1096 bfd_elf_generic_reloc, /* special_function */
1097 "R_PPC64_ADDR16_LO_DS",/* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xfffc, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1104 HOWTO (R_PPC64_GOT16_DS, /* type */
1105 0, /* rightshift */
1106 1, /* size (0 = byte, 1 = short, 2 = long) */
1107 16, /* bitsize */
1108 FALSE, /* pc_relative */
1109 0, /* bitpos */
1110 complain_overflow_signed, /* complain_on_overflow */
1111 ppc64_elf_unhandled_reloc, /* special_function */
1112 "R_PPC64_GOT16_DS", /* name */
1113 FALSE, /* partial_inplace */
1114 0, /* src_mask */
1115 0xfffc, /* dst_mask */
1116 FALSE), /* pcrel_offset */
1117
1118 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1119 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_dont, /* complain_on_overflow */
1126 ppc64_elf_unhandled_reloc, /* special_function */
1127 "R_PPC64_GOT16_LO_DS", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xfffc, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1134 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_dont, /* complain_on_overflow */
1141 ppc64_elf_unhandled_reloc, /* special_function */
1142 "R_PPC64_PLT16_LO_DS", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xfffc, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1149 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1150 0, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_bitfield, /* complain_on_overflow */
1156 ppc64_elf_sectoff_reloc, /* special_function */
1157 "R_PPC64_SECTOFF_DS", /* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xfffc, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1164 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1165 0, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_dont, /* complain_on_overflow */
1171 ppc64_elf_sectoff_reloc, /* special_function */
1172 "R_PPC64_SECTOFF_LO_DS",/* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xfffc, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1179 HOWTO (R_PPC64_TOC16_DS, /* type */
1180 0, /* rightshift */
1181 1, /* size (0 = byte, 1 = short, 2 = long) */
1182 16, /* bitsize */
1183 FALSE, /* pc_relative */
1184 0, /* bitpos */
1185 complain_overflow_signed, /* complain_on_overflow */
1186 ppc64_elf_toc_reloc, /* special_function */
1187 "R_PPC64_TOC16_DS", /* name */
1188 FALSE, /* partial_inplace */
1189 0, /* src_mask */
1190 0xfffc, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1192
1193 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1194 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1195 0, /* rightshift */
1196 1, /* size (0 = byte, 1 = short, 2 = long) */
1197 16, /* bitsize */
1198 FALSE, /* pc_relative */
1199 0, /* bitpos */
1200 complain_overflow_dont, /* complain_on_overflow */
1201 ppc64_elf_toc_reloc, /* special_function */
1202 "R_PPC64_TOC16_LO_DS", /* name */
1203 FALSE, /* partial_inplace */
1204 0, /* src_mask */
1205 0xfffc, /* dst_mask */
1206 FALSE), /* pcrel_offset */
1207
1208 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1209 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1210 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1211 0, /* rightshift */
1212 1, /* size (0 = byte, 1 = short, 2 = long) */
1213 16, /* bitsize */
1214 FALSE, /* pc_relative */
1215 0, /* bitpos */
1216 complain_overflow_signed, /* complain_on_overflow */
1217 ppc64_elf_unhandled_reloc, /* special_function */
1218 "R_PPC64_PLTGOT16_DS", /* name */
1219 FALSE, /* partial_inplace */
1220 0, /* src_mask */
1221 0xfffc, /* dst_mask */
1222 FALSE), /* pcrel_offset */
1223
1224 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1225 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1226 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1227 0, /* rightshift */
1228 1, /* size (0 = byte, 1 = short, 2 = long) */
1229 16, /* bitsize */
1230 FALSE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_dont, /* complain_on_overflow */
1233 ppc64_elf_unhandled_reloc, /* special_function */
1234 "R_PPC64_PLTGOT16_LO_DS",/* name */
1235 FALSE, /* partial_inplace */
1236 0, /* src_mask */
1237 0xfffc, /* dst_mask */
1238 FALSE), /* pcrel_offset */
1239
1240 /* Marker relocs for TLS. */
1241 HOWTO (R_PPC64_TLS,
1242 0, /* rightshift */
1243 2, /* size (0 = byte, 1 = short, 2 = long) */
1244 32, /* bitsize */
1245 FALSE, /* pc_relative */
1246 0, /* bitpos */
1247 complain_overflow_dont, /* complain_on_overflow */
1248 bfd_elf_generic_reloc, /* special_function */
1249 "R_PPC64_TLS", /* name */
1250 FALSE, /* partial_inplace */
1251 0, /* src_mask */
1252 0, /* dst_mask */
1253 FALSE), /* pcrel_offset */
1254
1255 HOWTO (R_PPC64_TLSGD,
1256 0, /* rightshift */
1257 2, /* size (0 = byte, 1 = short, 2 = long) */
1258 32, /* bitsize */
1259 FALSE, /* pc_relative */
1260 0, /* bitpos */
1261 complain_overflow_dont, /* complain_on_overflow */
1262 bfd_elf_generic_reloc, /* special_function */
1263 "R_PPC64_TLSGD", /* name */
1264 FALSE, /* partial_inplace */
1265 0, /* src_mask */
1266 0, /* dst_mask */
1267 FALSE), /* pcrel_offset */
1268
1269 HOWTO (R_PPC64_TLSLD,
1270 0, /* rightshift */
1271 2, /* size (0 = byte, 1 = short, 2 = long) */
1272 32, /* bitsize */
1273 FALSE, /* pc_relative */
1274 0, /* bitpos */
1275 complain_overflow_dont, /* complain_on_overflow */
1276 bfd_elf_generic_reloc, /* special_function */
1277 "R_PPC64_TLSLD", /* name */
1278 FALSE, /* partial_inplace */
1279 0, /* src_mask */
1280 0, /* dst_mask */
1281 FALSE), /* pcrel_offset */
1282
1283 /* Computes the load module index of the load module that contains the
1284 definition of its TLS sym. */
1285 HOWTO (R_PPC64_DTPMOD64,
1286 0, /* rightshift */
1287 4, /* size (0 = byte, 1 = short, 2 = long) */
1288 64, /* bitsize */
1289 FALSE, /* pc_relative */
1290 0, /* bitpos */
1291 complain_overflow_dont, /* complain_on_overflow */
1292 ppc64_elf_unhandled_reloc, /* special_function */
1293 "R_PPC64_DTPMOD64", /* name */
1294 FALSE, /* partial_inplace */
1295 0, /* src_mask */
1296 ONES (64), /* dst_mask */
1297 FALSE), /* pcrel_offset */
1298
1299 /* Computes a dtv-relative displacement, the difference between the value
1300 of sym+add and the base address of the thread-local storage block that
1301 contains the definition of sym, minus 0x8000. */
1302 HOWTO (R_PPC64_DTPREL64,
1303 0, /* rightshift */
1304 4, /* size (0 = byte, 1 = short, 2 = long) */
1305 64, /* bitsize */
1306 FALSE, /* pc_relative */
1307 0, /* bitpos */
1308 complain_overflow_dont, /* complain_on_overflow */
1309 ppc64_elf_unhandled_reloc, /* special_function */
1310 "R_PPC64_DTPREL64", /* name */
1311 FALSE, /* partial_inplace */
1312 0, /* src_mask */
1313 ONES (64), /* dst_mask */
1314 FALSE), /* pcrel_offset */
1315
1316 /* A 16 bit dtprel reloc. */
1317 HOWTO (R_PPC64_DTPREL16,
1318 0, /* rightshift */
1319 1, /* size (0 = byte, 1 = short, 2 = long) */
1320 16, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_signed, /* complain_on_overflow */
1324 ppc64_elf_unhandled_reloc, /* special_function */
1325 "R_PPC64_DTPREL16", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0xffff, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 /* Like DTPREL16, but no overflow. */
1332 HOWTO (R_PPC64_DTPREL16_LO,
1333 0, /* rightshift */
1334 1, /* size (0 = byte, 1 = short, 2 = long) */
1335 16, /* bitsize */
1336 FALSE, /* pc_relative */
1337 0, /* bitpos */
1338 complain_overflow_dont, /* complain_on_overflow */
1339 ppc64_elf_unhandled_reloc, /* special_function */
1340 "R_PPC64_DTPREL16_LO", /* name */
1341 FALSE, /* partial_inplace */
1342 0, /* src_mask */
1343 0xffff, /* dst_mask */
1344 FALSE), /* pcrel_offset */
1345
1346 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1347 HOWTO (R_PPC64_DTPREL16_HI,
1348 16, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_dont, /* complain_on_overflow */
1354 ppc64_elf_unhandled_reloc, /* special_function */
1355 "R_PPC64_DTPREL16_HI", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1362 HOWTO (R_PPC64_DTPREL16_HA,
1363 16, /* rightshift */
1364 1, /* size (0 = byte, 1 = short, 2 = long) */
1365 16, /* bitsize */
1366 FALSE, /* pc_relative */
1367 0, /* bitpos */
1368 complain_overflow_dont, /* complain_on_overflow */
1369 ppc64_elf_unhandled_reloc, /* special_function */
1370 "R_PPC64_DTPREL16_HA", /* name */
1371 FALSE, /* partial_inplace */
1372 0, /* src_mask */
1373 0xffff, /* dst_mask */
1374 FALSE), /* pcrel_offset */
1375
1376 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1377 HOWTO (R_PPC64_DTPREL16_HIGHER,
1378 32, /* rightshift */
1379 1, /* size (0 = byte, 1 = short, 2 = long) */
1380 16, /* bitsize */
1381 FALSE, /* pc_relative */
1382 0, /* bitpos */
1383 complain_overflow_dont, /* complain_on_overflow */
1384 ppc64_elf_unhandled_reloc, /* special_function */
1385 "R_PPC64_DTPREL16_HIGHER", /* name */
1386 FALSE, /* partial_inplace */
1387 0, /* src_mask */
1388 0xffff, /* dst_mask */
1389 FALSE), /* pcrel_offset */
1390
1391 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1392 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1393 32, /* rightshift */
1394 1, /* size (0 = byte, 1 = short, 2 = long) */
1395 16, /* bitsize */
1396 FALSE, /* pc_relative */
1397 0, /* bitpos */
1398 complain_overflow_dont, /* complain_on_overflow */
1399 ppc64_elf_unhandled_reloc, /* special_function */
1400 "R_PPC64_DTPREL16_HIGHERA", /* name */
1401 FALSE, /* partial_inplace */
1402 0, /* src_mask */
1403 0xffff, /* dst_mask */
1404 FALSE), /* pcrel_offset */
1405
1406 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1407 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1408 48, /* rightshift */
1409 1, /* size (0 = byte, 1 = short, 2 = long) */
1410 16, /* bitsize */
1411 FALSE, /* pc_relative */
1412 0, /* bitpos */
1413 complain_overflow_dont, /* complain_on_overflow */
1414 ppc64_elf_unhandled_reloc, /* special_function */
1415 "R_PPC64_DTPREL16_HIGHEST", /* name */
1416 FALSE, /* partial_inplace */
1417 0, /* src_mask */
1418 0xffff, /* dst_mask */
1419 FALSE), /* pcrel_offset */
1420
1421 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1422 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1423 48, /* rightshift */
1424 1, /* size (0 = byte, 1 = short, 2 = long) */
1425 16, /* bitsize */
1426 FALSE, /* pc_relative */
1427 0, /* bitpos */
1428 complain_overflow_dont, /* complain_on_overflow */
1429 ppc64_elf_unhandled_reloc, /* special_function */
1430 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1431 FALSE, /* partial_inplace */
1432 0, /* src_mask */
1433 0xffff, /* dst_mask */
1434 FALSE), /* pcrel_offset */
1435
1436 /* Like DTPREL16, but for insns with a DS field. */
1437 HOWTO (R_PPC64_DTPREL16_DS,
1438 0, /* rightshift */
1439 1, /* size (0 = byte, 1 = short, 2 = long) */
1440 16, /* bitsize */
1441 FALSE, /* pc_relative */
1442 0, /* bitpos */
1443 complain_overflow_signed, /* complain_on_overflow */
1444 ppc64_elf_unhandled_reloc, /* special_function */
1445 "R_PPC64_DTPREL16_DS", /* name */
1446 FALSE, /* partial_inplace */
1447 0, /* src_mask */
1448 0xfffc, /* dst_mask */
1449 FALSE), /* pcrel_offset */
1450
1451 /* Like DTPREL16_DS, but no overflow. */
1452 HOWTO (R_PPC64_DTPREL16_LO_DS,
1453 0, /* rightshift */
1454 1, /* size (0 = byte, 1 = short, 2 = long) */
1455 16, /* bitsize */
1456 FALSE, /* pc_relative */
1457 0, /* bitpos */
1458 complain_overflow_dont, /* complain_on_overflow */
1459 ppc64_elf_unhandled_reloc, /* special_function */
1460 "R_PPC64_DTPREL16_LO_DS", /* name */
1461 FALSE, /* partial_inplace */
1462 0, /* src_mask */
1463 0xfffc, /* dst_mask */
1464 FALSE), /* pcrel_offset */
1465
1466 /* Computes a tp-relative displacement, the difference between the value of
1467 sym+add and the value of the thread pointer (r13). */
1468 HOWTO (R_PPC64_TPREL64,
1469 0, /* rightshift */
1470 4, /* size (0 = byte, 1 = short, 2 = long) */
1471 64, /* bitsize */
1472 FALSE, /* pc_relative */
1473 0, /* bitpos */
1474 complain_overflow_dont, /* complain_on_overflow */
1475 ppc64_elf_unhandled_reloc, /* special_function */
1476 "R_PPC64_TPREL64", /* name */
1477 FALSE, /* partial_inplace */
1478 0, /* src_mask */
1479 ONES (64), /* dst_mask */
1480 FALSE), /* pcrel_offset */
1481
1482 /* A 16 bit tprel reloc. */
1483 HOWTO (R_PPC64_TPREL16,
1484 0, /* rightshift */
1485 1, /* size (0 = byte, 1 = short, 2 = long) */
1486 16, /* bitsize */
1487 FALSE, /* pc_relative */
1488 0, /* bitpos */
1489 complain_overflow_signed, /* complain_on_overflow */
1490 ppc64_elf_unhandled_reloc, /* special_function */
1491 "R_PPC64_TPREL16", /* name */
1492 FALSE, /* partial_inplace */
1493 0, /* src_mask */
1494 0xffff, /* dst_mask */
1495 FALSE), /* pcrel_offset */
1496
1497 /* Like TPREL16, but no overflow. */
1498 HOWTO (R_PPC64_TPREL16_LO,
1499 0, /* rightshift */
1500 1, /* size (0 = byte, 1 = short, 2 = long) */
1501 16, /* bitsize */
1502 FALSE, /* pc_relative */
1503 0, /* bitpos */
1504 complain_overflow_dont, /* complain_on_overflow */
1505 ppc64_elf_unhandled_reloc, /* special_function */
1506 "R_PPC64_TPREL16_LO", /* name */
1507 FALSE, /* partial_inplace */
1508 0, /* src_mask */
1509 0xffff, /* dst_mask */
1510 FALSE), /* pcrel_offset */
1511
1512 /* Like TPREL16_LO, but next higher group of 16 bits. */
1513 HOWTO (R_PPC64_TPREL16_HI,
1514 16, /* rightshift */
1515 1, /* size (0 = byte, 1 = short, 2 = long) */
1516 16, /* bitsize */
1517 FALSE, /* pc_relative */
1518 0, /* bitpos */
1519 complain_overflow_dont, /* complain_on_overflow */
1520 ppc64_elf_unhandled_reloc, /* special_function */
1521 "R_PPC64_TPREL16_HI", /* name */
1522 FALSE, /* partial_inplace */
1523 0, /* src_mask */
1524 0xffff, /* dst_mask */
1525 FALSE), /* pcrel_offset */
1526
1527 /* Like TPREL16_HI, but adjust for low 16 bits. */
1528 HOWTO (R_PPC64_TPREL16_HA,
1529 16, /* rightshift */
1530 1, /* size (0 = byte, 1 = short, 2 = long) */
1531 16, /* bitsize */
1532 FALSE, /* pc_relative */
1533 0, /* bitpos */
1534 complain_overflow_dont, /* complain_on_overflow */
1535 ppc64_elf_unhandled_reloc, /* special_function */
1536 "R_PPC64_TPREL16_HA", /* name */
1537 FALSE, /* partial_inplace */
1538 0, /* src_mask */
1539 0xffff, /* dst_mask */
1540 FALSE), /* pcrel_offset */
1541
1542 /* Like TPREL16_HI, but next higher group of 16 bits. */
1543 HOWTO (R_PPC64_TPREL16_HIGHER,
1544 32, /* rightshift */
1545 1, /* size (0 = byte, 1 = short, 2 = long) */
1546 16, /* bitsize */
1547 FALSE, /* pc_relative */
1548 0, /* bitpos */
1549 complain_overflow_dont, /* complain_on_overflow */
1550 ppc64_elf_unhandled_reloc, /* special_function */
1551 "R_PPC64_TPREL16_HIGHER", /* name */
1552 FALSE, /* partial_inplace */
1553 0, /* src_mask */
1554 0xffff, /* dst_mask */
1555 FALSE), /* pcrel_offset */
1556
1557 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1558 HOWTO (R_PPC64_TPREL16_HIGHERA,
1559 32, /* rightshift */
1560 1, /* size (0 = byte, 1 = short, 2 = long) */
1561 16, /* bitsize */
1562 FALSE, /* pc_relative */
1563 0, /* bitpos */
1564 complain_overflow_dont, /* complain_on_overflow */
1565 ppc64_elf_unhandled_reloc, /* special_function */
1566 "R_PPC64_TPREL16_HIGHERA", /* name */
1567 FALSE, /* partial_inplace */
1568 0, /* src_mask */
1569 0xffff, /* dst_mask */
1570 FALSE), /* pcrel_offset */
1571
1572 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1573 HOWTO (R_PPC64_TPREL16_HIGHEST,
1574 48, /* rightshift */
1575 1, /* size (0 = byte, 1 = short, 2 = long) */
1576 16, /* bitsize */
1577 FALSE, /* pc_relative */
1578 0, /* bitpos */
1579 complain_overflow_dont, /* complain_on_overflow */
1580 ppc64_elf_unhandled_reloc, /* special_function */
1581 "R_PPC64_TPREL16_HIGHEST", /* name */
1582 FALSE, /* partial_inplace */
1583 0, /* src_mask */
1584 0xffff, /* dst_mask */
1585 FALSE), /* pcrel_offset */
1586
1587 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1588 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1589 48, /* rightshift */
1590 1, /* size (0 = byte, 1 = short, 2 = long) */
1591 16, /* bitsize */
1592 FALSE, /* pc_relative */
1593 0, /* bitpos */
1594 complain_overflow_dont, /* complain_on_overflow */
1595 ppc64_elf_unhandled_reloc, /* special_function */
1596 "R_PPC64_TPREL16_HIGHESTA", /* name */
1597 FALSE, /* partial_inplace */
1598 0, /* src_mask */
1599 0xffff, /* dst_mask */
1600 FALSE), /* pcrel_offset */
1601
1602 /* Like TPREL16, but for insns with a DS field. */
1603 HOWTO (R_PPC64_TPREL16_DS,
1604 0, /* rightshift */
1605 1, /* size (0 = byte, 1 = short, 2 = long) */
1606 16, /* bitsize */
1607 FALSE, /* pc_relative */
1608 0, /* bitpos */
1609 complain_overflow_signed, /* complain_on_overflow */
1610 ppc64_elf_unhandled_reloc, /* special_function */
1611 "R_PPC64_TPREL16_DS", /* name */
1612 FALSE, /* partial_inplace */
1613 0, /* src_mask */
1614 0xfffc, /* dst_mask */
1615 FALSE), /* pcrel_offset */
1616
1617 /* Like TPREL16_DS, but no overflow. */
1618 HOWTO (R_PPC64_TPREL16_LO_DS,
1619 0, /* rightshift */
1620 1, /* size (0 = byte, 1 = short, 2 = long) */
1621 16, /* bitsize */
1622 FALSE, /* pc_relative */
1623 0, /* bitpos */
1624 complain_overflow_dont, /* complain_on_overflow */
1625 ppc64_elf_unhandled_reloc, /* special_function */
1626 "R_PPC64_TPREL16_LO_DS", /* name */
1627 FALSE, /* partial_inplace */
1628 0, /* src_mask */
1629 0xfffc, /* dst_mask */
1630 FALSE), /* pcrel_offset */
1631
1632 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1633 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1634 to the first entry relative to the TOC base (r2). */
1635 HOWTO (R_PPC64_GOT_TLSGD16,
1636 0, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_signed, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_GOT_TLSGD16", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like GOT_TLSGD16, but no overflow. */
1650 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1651 0, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_GOT_TLSGD16_LO", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1665 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1666 16, /* rightshift */
1667 1, /* size (0 = byte, 1 = short, 2 = long) */
1668 16, /* bitsize */
1669 FALSE, /* pc_relative */
1670 0, /* bitpos */
1671 complain_overflow_dont, /* complain_on_overflow */
1672 ppc64_elf_unhandled_reloc, /* special_function */
1673 "R_PPC64_GOT_TLSGD16_HI", /* name */
1674 FALSE, /* partial_inplace */
1675 0, /* src_mask */
1676 0xffff, /* dst_mask */
1677 FALSE), /* pcrel_offset */
1678
1679 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1680 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1681 16, /* rightshift */
1682 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 16, /* bitsize */
1684 FALSE, /* pc_relative */
1685 0, /* bitpos */
1686 complain_overflow_dont, /* complain_on_overflow */
1687 ppc64_elf_unhandled_reloc, /* special_function */
1688 "R_PPC64_GOT_TLSGD16_HA", /* name */
1689 FALSE, /* partial_inplace */
1690 0, /* src_mask */
1691 0xffff, /* dst_mask */
1692 FALSE), /* pcrel_offset */
1693
1694 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1695 with values (sym+add)@dtpmod and zero, and computes the offset to the
1696 first entry relative to the TOC base (r2). */
1697 HOWTO (R_PPC64_GOT_TLSLD16,
1698 0, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_signed, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_TLSLD16", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xffff, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_TLSLD16, but no overflow. */
1712 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1713 0, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_TLSLD16_LO", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xffff, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1727 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1728 16, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_dont, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_TLSLD16_HI", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xffff, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1742 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1743 16, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_dont, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_TLSLD16_HA", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xffff, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1757 the offset to the entry relative to the TOC base (r2). */
1758 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1759 0, /* rightshift */
1760 1, /* size (0 = byte, 1 = short, 2 = long) */
1761 16, /* bitsize */
1762 FALSE, /* pc_relative */
1763 0, /* bitpos */
1764 complain_overflow_signed, /* complain_on_overflow */
1765 ppc64_elf_unhandled_reloc, /* special_function */
1766 "R_PPC64_GOT_DTPREL16_DS", /* name */
1767 FALSE, /* partial_inplace */
1768 0, /* src_mask */
1769 0xfffc, /* dst_mask */
1770 FALSE), /* pcrel_offset */
1771
1772 /* Like GOT_DTPREL16_DS, but no overflow. */
1773 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1774 0, /* rightshift */
1775 1, /* size (0 = byte, 1 = short, 2 = long) */
1776 16, /* bitsize */
1777 FALSE, /* pc_relative */
1778 0, /* bitpos */
1779 complain_overflow_dont, /* complain_on_overflow */
1780 ppc64_elf_unhandled_reloc, /* special_function */
1781 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1782 FALSE, /* partial_inplace */
1783 0, /* src_mask */
1784 0xfffc, /* dst_mask */
1785 FALSE), /* pcrel_offset */
1786
1787 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1788 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1789 16, /* rightshift */
1790 1, /* size (0 = byte, 1 = short, 2 = long) */
1791 16, /* bitsize */
1792 FALSE, /* pc_relative */
1793 0, /* bitpos */
1794 complain_overflow_dont, /* complain_on_overflow */
1795 ppc64_elf_unhandled_reloc, /* special_function */
1796 "R_PPC64_GOT_DTPREL16_HI", /* name */
1797 FALSE, /* partial_inplace */
1798 0, /* src_mask */
1799 0xffff, /* dst_mask */
1800 FALSE), /* pcrel_offset */
1801
1802 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1803 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1804 16, /* rightshift */
1805 1, /* size (0 = byte, 1 = short, 2 = long) */
1806 16, /* bitsize */
1807 FALSE, /* pc_relative */
1808 0, /* bitpos */
1809 complain_overflow_dont, /* complain_on_overflow */
1810 ppc64_elf_unhandled_reloc, /* special_function */
1811 "R_PPC64_GOT_DTPREL16_HA", /* name */
1812 FALSE, /* partial_inplace */
1813 0, /* src_mask */
1814 0xffff, /* dst_mask */
1815 FALSE), /* pcrel_offset */
1816
1817 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1818 offset to the entry relative to the TOC base (r2). */
1819 HOWTO (R_PPC64_GOT_TPREL16_DS,
1820 0, /* rightshift */
1821 1, /* size (0 = byte, 1 = short, 2 = long) */
1822 16, /* bitsize */
1823 FALSE, /* pc_relative */
1824 0, /* bitpos */
1825 complain_overflow_signed, /* complain_on_overflow */
1826 ppc64_elf_unhandled_reloc, /* special_function */
1827 "R_PPC64_GOT_TPREL16_DS", /* name */
1828 FALSE, /* partial_inplace */
1829 0, /* src_mask */
1830 0xfffc, /* dst_mask */
1831 FALSE), /* pcrel_offset */
1832
1833 /* Like GOT_TPREL16_DS, but no overflow. */
1834 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1835 0, /* rightshift */
1836 1, /* size (0 = byte, 1 = short, 2 = long) */
1837 16, /* bitsize */
1838 FALSE, /* pc_relative */
1839 0, /* bitpos */
1840 complain_overflow_dont, /* complain_on_overflow */
1841 ppc64_elf_unhandled_reloc, /* special_function */
1842 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1843 FALSE, /* partial_inplace */
1844 0, /* src_mask */
1845 0xfffc, /* dst_mask */
1846 FALSE), /* pcrel_offset */
1847
1848 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1849 HOWTO (R_PPC64_GOT_TPREL16_HI,
1850 16, /* rightshift */
1851 1, /* size (0 = byte, 1 = short, 2 = long) */
1852 16, /* bitsize */
1853 FALSE, /* pc_relative */
1854 0, /* bitpos */
1855 complain_overflow_dont, /* complain_on_overflow */
1856 ppc64_elf_unhandled_reloc, /* special_function */
1857 "R_PPC64_GOT_TPREL16_HI", /* name */
1858 FALSE, /* partial_inplace */
1859 0, /* src_mask */
1860 0xffff, /* dst_mask */
1861 FALSE), /* pcrel_offset */
1862
1863 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1864 HOWTO (R_PPC64_GOT_TPREL16_HA,
1865 16, /* rightshift */
1866 1, /* size (0 = byte, 1 = short, 2 = long) */
1867 16, /* bitsize */
1868 FALSE, /* pc_relative */
1869 0, /* bitpos */
1870 complain_overflow_dont, /* complain_on_overflow */
1871 ppc64_elf_unhandled_reloc, /* special_function */
1872 "R_PPC64_GOT_TPREL16_HA", /* name */
1873 FALSE, /* partial_inplace */
1874 0, /* src_mask */
1875 0xffff, /* dst_mask */
1876 FALSE), /* pcrel_offset */
1877
1878 HOWTO (R_PPC64_JMP_IREL, /* type */
1879 0, /* rightshift */
1880 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1881 0, /* bitsize */
1882 FALSE, /* pc_relative */
1883 0, /* bitpos */
1884 complain_overflow_dont, /* complain_on_overflow */
1885 ppc64_elf_unhandled_reloc, /* special_function */
1886 "R_PPC64_JMP_IREL", /* name */
1887 FALSE, /* partial_inplace */
1888 0, /* src_mask */
1889 0, /* dst_mask */
1890 FALSE), /* pcrel_offset */
1891
1892 HOWTO (R_PPC64_IRELATIVE, /* type */
1893 0, /* rightshift */
1894 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1895 64, /* bitsize */
1896 FALSE, /* pc_relative */
1897 0, /* bitpos */
1898 complain_overflow_dont, /* complain_on_overflow */
1899 bfd_elf_generic_reloc, /* special_function */
1900 "R_PPC64_IRELATIVE", /* name */
1901 FALSE, /* partial_inplace */
1902 0, /* src_mask */
1903 ONES (64), /* dst_mask */
1904 FALSE), /* pcrel_offset */
1905
1906 /* A 16 bit relative relocation. */
1907 HOWTO (R_PPC64_REL16, /* type */
1908 0, /* rightshift */
1909 1, /* size (0 = byte, 1 = short, 2 = long) */
1910 16, /* bitsize */
1911 TRUE, /* pc_relative */
1912 0, /* bitpos */
1913 complain_overflow_bitfield, /* complain_on_overflow */
1914 bfd_elf_generic_reloc, /* special_function */
1915 "R_PPC64_REL16", /* name */
1916 FALSE, /* partial_inplace */
1917 0, /* src_mask */
1918 0xffff, /* dst_mask */
1919 TRUE), /* pcrel_offset */
1920
1921 /* A 16 bit relative relocation without overflow. */
1922 HOWTO (R_PPC64_REL16_LO, /* type */
1923 0, /* rightshift */
1924 1, /* size (0 = byte, 1 = short, 2 = long) */
1925 16, /* bitsize */
1926 TRUE, /* pc_relative */
1927 0, /* bitpos */
1928 complain_overflow_dont,/* complain_on_overflow */
1929 bfd_elf_generic_reloc, /* special_function */
1930 "R_PPC64_REL16_LO", /* name */
1931 FALSE, /* partial_inplace */
1932 0, /* src_mask */
1933 0xffff, /* dst_mask */
1934 TRUE), /* pcrel_offset */
1935
1936 /* The high order 16 bits of a relative address. */
1937 HOWTO (R_PPC64_REL16_HI, /* type */
1938 16, /* rightshift */
1939 1, /* size (0 = byte, 1 = short, 2 = long) */
1940 16, /* bitsize */
1941 TRUE, /* pc_relative */
1942 0, /* bitpos */
1943 complain_overflow_dont, /* complain_on_overflow */
1944 bfd_elf_generic_reloc, /* special_function */
1945 "R_PPC64_REL16_HI", /* name */
1946 FALSE, /* partial_inplace */
1947 0, /* src_mask */
1948 0xffff, /* dst_mask */
1949 TRUE), /* pcrel_offset */
1950
1951 /* The high order 16 bits of a relative address, plus 1 if the contents of
1952 the low 16 bits, treated as a signed number, is negative. */
1953 HOWTO (R_PPC64_REL16_HA, /* type */
1954 16, /* rightshift */
1955 1, /* size (0 = byte, 1 = short, 2 = long) */
1956 16, /* bitsize */
1957 TRUE, /* pc_relative */
1958 0, /* bitpos */
1959 complain_overflow_dont, /* complain_on_overflow */
1960 ppc64_elf_ha_reloc, /* special_function */
1961 "R_PPC64_REL16_HA", /* name */
1962 FALSE, /* partial_inplace */
1963 0, /* src_mask */
1964 0xffff, /* dst_mask */
1965 TRUE), /* pcrel_offset */
1966
1967 /* GNU extension to record C++ vtable hierarchy. */
1968 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1969 0, /* rightshift */
1970 0, /* size (0 = byte, 1 = short, 2 = long) */
1971 0, /* bitsize */
1972 FALSE, /* pc_relative */
1973 0, /* bitpos */
1974 complain_overflow_dont, /* complain_on_overflow */
1975 NULL, /* special_function */
1976 "R_PPC64_GNU_VTINHERIT", /* name */
1977 FALSE, /* partial_inplace */
1978 0, /* src_mask */
1979 0, /* dst_mask */
1980 FALSE), /* pcrel_offset */
1981
1982 /* GNU extension to record C++ vtable member usage. */
1983 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1984 0, /* rightshift */
1985 0, /* size (0 = byte, 1 = short, 2 = long) */
1986 0, /* bitsize */
1987 FALSE, /* pc_relative */
1988 0, /* bitpos */
1989 complain_overflow_dont, /* complain_on_overflow */
1990 NULL, /* special_function */
1991 "R_PPC64_GNU_VTENTRY", /* name */
1992 FALSE, /* partial_inplace */
1993 0, /* src_mask */
1994 0, /* dst_mask */
1995 FALSE), /* pcrel_offset */
1996 };
1997
1998 \f
1999 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2000 be done. */
2001
2002 static void
2003 ppc_howto_init (void)
2004 {
2005 unsigned int i, type;
2006
2007 for (i = 0;
2008 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2009 i++)
2010 {
2011 type = ppc64_elf_howto_raw[i].type;
2012 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2013 / sizeof (ppc64_elf_howto_table[0])));
2014 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2015 }
2016 }
2017
2018 static reloc_howto_type *
2019 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2020 bfd_reloc_code_real_type code)
2021 {
2022 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2023
2024 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2025 /* Initialize howto table if needed. */
2026 ppc_howto_init ();
2027
2028 switch (code)
2029 {
2030 default:
2031 return NULL;
2032
2033 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2034 break;
2035 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2036 break;
2037 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2038 break;
2039 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2040 break;
2041 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2042 break;
2043 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2044 break;
2045 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2046 break;
2047 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2048 break;
2049 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2050 break;
2051 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2052 break;
2053 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2054 break;
2055 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2056 break;
2057 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2058 break;
2059 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2060 break;
2061 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2062 break;
2063 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2064 break;
2065 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2066 break;
2067 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2068 break;
2069 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2070 break;
2071 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2072 break;
2073 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2074 break;
2075 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2076 break;
2077 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2078 break;
2079 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2080 break;
2081 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2082 break;
2083 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2084 break;
2085 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2086 break;
2087 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2088 break;
2089 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2090 break;
2091 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2092 break;
2093 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2094 break;
2095 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2096 break;
2097 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2098 break;
2099 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2100 break;
2101 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2102 break;
2103 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2104 break;
2105 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2106 break;
2107 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2108 break;
2109 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2110 break;
2111 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2112 break;
2113 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2114 break;
2115 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2116 break;
2117 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2118 break;
2119 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2120 break;
2121 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2122 break;
2123 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2124 break;
2125 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2126 break;
2127 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2128 break;
2129 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2130 break;
2131 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2132 break;
2133 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2134 break;
2135 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2136 break;
2137 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2138 break;
2139 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2140 break;
2141 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2142 break;
2143 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2144 break;
2145 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2146 break;
2147 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2148 break;
2149 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2150 break;
2151 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2152 break;
2153 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2154 break;
2155 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2156 break;
2157 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2158 break;
2159 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2160 break;
2161 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2162 break;
2163 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2164 break;
2165 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2166 break;
2167 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2168 break;
2169 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2170 break;
2171 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2172 break;
2173 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2174 break;
2175 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2176 break;
2177 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2178 break;
2179 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2180 break;
2181 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2182 break;
2183 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2184 break;
2185 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2186 break;
2187 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2188 break;
2189 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2190 break;
2191 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2192 break;
2193 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2194 break;
2195 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2196 break;
2197 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2198 break;
2199 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2200 break;
2201 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2202 break;
2203 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2204 break;
2205 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2206 break;
2207 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2208 break;
2209 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2210 break;
2211 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2212 break;
2213 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2214 break;
2215 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2216 break;
2217 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2218 break;
2219 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2220 break;
2221 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2222 break;
2223 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2224 break;
2225 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2226 break;
2227 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2228 break;
2229 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2230 break;
2231 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2232 break;
2233 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2234 break;
2235 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2236 break;
2237 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2238 break;
2239 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2240 break;
2241 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2242 break;
2243 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2244 break;
2245 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2246 break;
2247 }
2248
2249 return ppc64_elf_howto_table[r];
2250 };
2251
2252 static reloc_howto_type *
2253 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2254 const char *r_name)
2255 {
2256 unsigned int i;
2257
2258 for (i = 0;
2259 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2260 i++)
2261 if (ppc64_elf_howto_raw[i].name != NULL
2262 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2263 return &ppc64_elf_howto_raw[i];
2264
2265 return NULL;
2266 }
2267
2268 /* Set the howto pointer for a PowerPC ELF reloc. */
2269
2270 static void
2271 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2272 Elf_Internal_Rela *dst)
2273 {
2274 unsigned int type;
2275
2276 /* Initialize howto table if needed. */
2277 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2278 ppc_howto_init ();
2279
2280 type = ELF64_R_TYPE (dst->r_info);
2281 if (type >= (sizeof (ppc64_elf_howto_table)
2282 / sizeof (ppc64_elf_howto_table[0])))
2283 {
2284 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2285 abfd, (int) type);
2286 type = R_PPC64_NONE;
2287 }
2288 cache_ptr->howto = ppc64_elf_howto_table[type];
2289 }
2290
2291 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2292
2293 static bfd_reloc_status_type
2294 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2295 void *data, asection *input_section,
2296 bfd *output_bfd, char **error_message)
2297 {
2298 /* If this is a relocatable link (output_bfd test tells us), just
2299 call the generic function. Any adjustment will be done at final
2300 link time. */
2301 if (output_bfd != NULL)
2302 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2303 input_section, output_bfd, error_message);
2304
2305 /* Adjust the addend for sign extension of the low 16 bits.
2306 We won't actually be using the low 16 bits, so trashing them
2307 doesn't matter. */
2308 reloc_entry->addend += 0x8000;
2309 return bfd_reloc_continue;
2310 }
2311
2312 static bfd_reloc_status_type
2313 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2314 void *data, asection *input_section,
2315 bfd *output_bfd, char **error_message)
2316 {
2317 if (output_bfd != NULL)
2318 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2319 input_section, output_bfd, error_message);
2320
2321 if (strcmp (symbol->section->name, ".opd") == 0
2322 && (symbol->section->owner->flags & DYNAMIC) == 0)
2323 {
2324 bfd_vma dest = opd_entry_value (symbol->section,
2325 symbol->value + reloc_entry->addend,
2326 NULL, NULL);
2327 if (dest != (bfd_vma) -1)
2328 reloc_entry->addend = dest - (symbol->value
2329 + symbol->section->output_section->vma
2330 + symbol->section->output_offset);
2331 }
2332 return bfd_reloc_continue;
2333 }
2334
2335 static bfd_reloc_status_type
2336 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2337 void *data, asection *input_section,
2338 bfd *output_bfd, char **error_message)
2339 {
2340 long insn;
2341 enum elf_ppc64_reloc_type r_type;
2342 bfd_size_type octets;
2343 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2344 bfd_boolean is_power4 = FALSE;
2345
2346 /* If this is a relocatable link (output_bfd test tells us), just
2347 call the generic function. Any adjustment will be done at final
2348 link time. */
2349 if (output_bfd != NULL)
2350 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2351 input_section, output_bfd, error_message);
2352
2353 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2354 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2355 insn &= ~(0x01 << 21);
2356 r_type = reloc_entry->howto->type;
2357 if (r_type == R_PPC64_ADDR14_BRTAKEN
2358 || r_type == R_PPC64_REL14_BRTAKEN)
2359 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2360
2361 if (is_power4)
2362 {
2363 /* Set 'a' bit. This is 0b00010 in BO field for branch
2364 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2365 for branch on CTR insns (BO == 1a00t or 1a01t). */
2366 if ((insn & (0x14 << 21)) == (0x04 << 21))
2367 insn |= 0x02 << 21;
2368 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2369 insn |= 0x08 << 21;
2370 else
2371 goto out;
2372 }
2373 else
2374 {
2375 bfd_vma target = 0;
2376 bfd_vma from;
2377
2378 if (!bfd_is_com_section (symbol->section))
2379 target = symbol->value;
2380 target += symbol->section->output_section->vma;
2381 target += symbol->section->output_offset;
2382 target += reloc_entry->addend;
2383
2384 from = (reloc_entry->address
2385 + input_section->output_offset
2386 + input_section->output_section->vma);
2387
2388 /* Invert 'y' bit if not the default. */
2389 if ((bfd_signed_vma) (target - from) < 0)
2390 insn ^= 0x01 << 21;
2391 }
2392 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2393 out:
2394 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2395 input_section, output_bfd, error_message);
2396 }
2397
2398 static bfd_reloc_status_type
2399 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2400 void *data, asection *input_section,
2401 bfd *output_bfd, char **error_message)
2402 {
2403 /* If this is a relocatable link (output_bfd test tells us), just
2404 call the generic function. Any adjustment will be done at final
2405 link time. */
2406 if (output_bfd != NULL)
2407 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2408 input_section, output_bfd, error_message);
2409
2410 /* Subtract the symbol section base address. */
2411 reloc_entry->addend -= symbol->section->output_section->vma;
2412 return bfd_reloc_continue;
2413 }
2414
2415 static bfd_reloc_status_type
2416 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2417 void *data, asection *input_section,
2418 bfd *output_bfd, char **error_message)
2419 {
2420 /* If this is a relocatable link (output_bfd test tells us), just
2421 call the generic function. Any adjustment will be done at final
2422 link time. */
2423 if (output_bfd != NULL)
2424 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2425 input_section, output_bfd, error_message);
2426
2427 /* Subtract the symbol section base address. */
2428 reloc_entry->addend -= symbol->section->output_section->vma;
2429
2430 /* Adjust the addend for sign extension of the low 16 bits. */
2431 reloc_entry->addend += 0x8000;
2432 return bfd_reloc_continue;
2433 }
2434
2435 static bfd_reloc_status_type
2436 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2437 void *data, asection *input_section,
2438 bfd *output_bfd, char **error_message)
2439 {
2440 bfd_vma TOCstart;
2441
2442 /* If this is a relocatable link (output_bfd test tells us), just
2443 call the generic function. Any adjustment will be done at final
2444 link time. */
2445 if (output_bfd != NULL)
2446 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2447 input_section, output_bfd, error_message);
2448
2449 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2450 if (TOCstart == 0)
2451 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2452
2453 /* Subtract the TOC base address. */
2454 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2455 return bfd_reloc_continue;
2456 }
2457
2458 static bfd_reloc_status_type
2459 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2460 void *data, asection *input_section,
2461 bfd *output_bfd, char **error_message)
2462 {
2463 bfd_vma TOCstart;
2464
2465 /* If this is a relocatable link (output_bfd test tells us), just
2466 call the generic function. Any adjustment will be done at final
2467 link time. */
2468 if (output_bfd != NULL)
2469 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2470 input_section, output_bfd, error_message);
2471
2472 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2473 if (TOCstart == 0)
2474 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2475
2476 /* Subtract the TOC base address. */
2477 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2478
2479 /* Adjust the addend for sign extension of the low 16 bits. */
2480 reloc_entry->addend += 0x8000;
2481 return bfd_reloc_continue;
2482 }
2483
2484 static bfd_reloc_status_type
2485 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2486 void *data, asection *input_section,
2487 bfd *output_bfd, char **error_message)
2488 {
2489 bfd_vma TOCstart;
2490 bfd_size_type octets;
2491
2492 /* If this is a relocatable link (output_bfd test tells us), just
2493 call the generic function. Any adjustment will be done at final
2494 link time. */
2495 if (output_bfd != NULL)
2496 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2497 input_section, output_bfd, error_message);
2498
2499 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2500 if (TOCstart == 0)
2501 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2502
2503 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2504 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2505 return bfd_reloc_ok;
2506 }
2507
2508 static bfd_reloc_status_type
2509 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2510 void *data, asection *input_section,
2511 bfd *output_bfd, char **error_message)
2512 {
2513 /* If this is a relocatable link (output_bfd test tells us), just
2514 call the generic function. Any adjustment will be done at final
2515 link time. */
2516 if (output_bfd != NULL)
2517 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2518 input_section, output_bfd, error_message);
2519
2520 if (error_message != NULL)
2521 {
2522 static char buf[60];
2523 sprintf (buf, "generic linker can't handle %s",
2524 reloc_entry->howto->name);
2525 *error_message = buf;
2526 }
2527 return bfd_reloc_dangerous;
2528 }
2529
2530 /* Track GOT entries needed for a given symbol. We might need more
2531 than one got entry per symbol. */
2532 struct got_entry
2533 {
2534 struct got_entry *next;
2535
2536 /* The symbol addend that we'll be placing in the GOT. */
2537 bfd_vma addend;
2538
2539 /* Unlike other ELF targets, we use separate GOT entries for the same
2540 symbol referenced from different input files. This is to support
2541 automatic multiple TOC/GOT sections, where the TOC base can vary
2542 from one input file to another. After partitioning into TOC groups
2543 we merge entries within the group.
2544
2545 Point to the BFD owning this GOT entry. */
2546 bfd *owner;
2547
2548 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2549 TLS_TPREL or TLS_DTPREL for tls entries. */
2550 unsigned char tls_type;
2551
2552 /* Non-zero if got.ent points to real entry. */
2553 unsigned char is_indirect;
2554
2555 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2556 union
2557 {
2558 bfd_signed_vma refcount;
2559 bfd_vma offset;
2560 struct got_entry *ent;
2561 } got;
2562 };
2563
2564 /* The same for PLT. */
2565 struct plt_entry
2566 {
2567 struct plt_entry *next;
2568
2569 bfd_vma addend;
2570
2571 union
2572 {
2573 bfd_signed_vma refcount;
2574 bfd_vma offset;
2575 } plt;
2576 };
2577
2578 struct ppc64_elf_obj_tdata
2579 {
2580 struct elf_obj_tdata elf;
2581
2582 /* Shortcuts to dynamic linker sections. */
2583 asection *got;
2584 asection *relgot;
2585
2586 /* Used during garbage collection. We attach global symbols defined
2587 on removed .opd entries to this section so that the sym is removed. */
2588 asection *deleted_section;
2589
2590 /* TLS local dynamic got entry handling. Support for multiple GOT
2591 sections means we potentially need one of these for each input bfd. */
2592 struct got_entry tlsld_got;
2593
2594 /* A copy of relocs before they are modified for --emit-relocs. */
2595 Elf_Internal_Rela *opd_relocs;
2596
2597 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2598 the reloc to be in the range -32768 to 32767. */
2599 unsigned int has_small_toc_reloc;
2600 };
2601
2602 #define ppc64_elf_tdata(bfd) \
2603 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2604
2605 #define ppc64_tlsld_got(bfd) \
2606 (&ppc64_elf_tdata (bfd)->tlsld_got)
2607
2608 #define is_ppc64_elf(bfd) \
2609 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2610 && elf_object_id (bfd) == PPC64_ELF_DATA)
2611
2612 /* Override the generic function because we store some extras. */
2613
2614 static bfd_boolean
2615 ppc64_elf_mkobject (bfd *abfd)
2616 {
2617 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2618 PPC64_ELF_DATA);
2619 }
2620
2621 /* Fix bad default arch selected for a 64 bit input bfd when the
2622 default is 32 bit. */
2623
2624 static bfd_boolean
2625 ppc64_elf_object_p (bfd *abfd)
2626 {
2627 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2628 {
2629 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2630
2631 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2632 {
2633 /* Relies on arch after 32 bit default being 64 bit default. */
2634 abfd->arch_info = abfd->arch_info->next;
2635 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2636 }
2637 }
2638 return TRUE;
2639 }
2640
2641 /* Support for core dump NOTE sections. */
2642
2643 static bfd_boolean
2644 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2645 {
2646 size_t offset, size;
2647
2648 if (note->descsz != 504)
2649 return FALSE;
2650
2651 /* pr_cursig */
2652 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2653
2654 /* pr_pid */
2655 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 32);
2656
2657 /* pr_reg */
2658 offset = 112;
2659 size = 384;
2660
2661 /* Make a ".reg/999" section. */
2662 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2663 size, note->descpos + offset);
2664 }
2665
2666 static bfd_boolean
2667 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2668 {
2669 if (note->descsz != 136)
2670 return FALSE;
2671
2672 elf_tdata (abfd)->core_program
2673 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2674 elf_tdata (abfd)->core_command
2675 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2676
2677 return TRUE;
2678 }
2679
2680 static char *
2681 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2682 ...)
2683 {
2684 switch (note_type)
2685 {
2686 default:
2687 return NULL;
2688
2689 case NT_PRPSINFO:
2690 {
2691 char data[136];
2692 va_list ap;
2693
2694 va_start (ap, note_type);
2695 memset (data, 0, 40);
2696 strncpy (data + 40, va_arg (ap, const char *), 16);
2697 strncpy (data + 56, va_arg (ap, const char *), 80);
2698 va_end (ap);
2699 return elfcore_write_note (abfd, buf, bufsiz,
2700 "CORE", note_type, data, sizeof (data));
2701 }
2702
2703 case NT_PRSTATUS:
2704 {
2705 char data[504];
2706 va_list ap;
2707 long pid;
2708 int cursig;
2709 const void *greg;
2710
2711 va_start (ap, note_type);
2712 memset (data, 0, 112);
2713 pid = va_arg (ap, long);
2714 bfd_put_32 (abfd, pid, data + 32);
2715 cursig = va_arg (ap, int);
2716 bfd_put_16 (abfd, cursig, data + 12);
2717 greg = va_arg (ap, const void *);
2718 memcpy (data + 112, greg, 384);
2719 memset (data + 496, 0, 8);
2720 va_end (ap);
2721 return elfcore_write_note (abfd, buf, bufsiz,
2722 "CORE", note_type, data, sizeof (data));
2723 }
2724 }
2725 }
2726
2727 /* Merge backend specific data from an object file to the output
2728 object file when linking. */
2729
2730 static bfd_boolean
2731 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2732 {
2733 /* Check if we have the same endianess. */
2734 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2735 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2736 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2737 {
2738 const char *msg;
2739
2740 if (bfd_big_endian (ibfd))
2741 msg = _("%B: compiled for a big endian system "
2742 "and target is little endian");
2743 else
2744 msg = _("%B: compiled for a little endian system "
2745 "and target is big endian");
2746
2747 (*_bfd_error_handler) (msg, ibfd);
2748
2749 bfd_set_error (bfd_error_wrong_format);
2750 return FALSE;
2751 }
2752
2753 return TRUE;
2754 }
2755
2756 /* Add extra PPC sections. */
2757
2758 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2759 {
2760 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2761 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2762 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2765 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2766 { NULL, 0, 0, 0, 0 }
2767 };
2768
2769 enum _ppc64_sec_type {
2770 sec_normal = 0,
2771 sec_opd = 1,
2772 sec_toc = 2
2773 };
2774
2775 struct _ppc64_elf_section_data
2776 {
2777 struct bfd_elf_section_data elf;
2778
2779 union
2780 {
2781 /* An array with one entry for each opd function descriptor. */
2782 struct _opd_sec_data
2783 {
2784 /* Points to the function code section for local opd entries. */
2785 asection **func_sec;
2786
2787 /* After editing .opd, adjust references to opd local syms. */
2788 long *adjust;
2789 } opd;
2790
2791 /* An array for toc sections, indexed by offset/8. */
2792 struct _toc_sec_data
2793 {
2794 /* Specifies the relocation symbol index used at a given toc offset. */
2795 unsigned *symndx;
2796
2797 /* And the relocation addend. */
2798 bfd_vma *add;
2799 } toc;
2800 } u;
2801
2802 enum _ppc64_sec_type sec_type:2;
2803
2804 /* Flag set when small branches are detected. Used to
2805 select suitable defaults for the stub group size. */
2806 unsigned int has_14bit_branch:1;
2807 };
2808
2809 #define ppc64_elf_section_data(sec) \
2810 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2811
2812 static bfd_boolean
2813 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2814 {
2815 if (!sec->used_by_bfd)
2816 {
2817 struct _ppc64_elf_section_data *sdata;
2818 bfd_size_type amt = sizeof (*sdata);
2819
2820 sdata = bfd_zalloc (abfd, amt);
2821 if (sdata == NULL)
2822 return FALSE;
2823 sec->used_by_bfd = sdata;
2824 }
2825
2826 return _bfd_elf_new_section_hook (abfd, sec);
2827 }
2828
2829 static struct _opd_sec_data *
2830 get_opd_info (asection * sec)
2831 {
2832 if (sec != NULL
2833 && ppc64_elf_section_data (sec) != NULL
2834 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2835 return &ppc64_elf_section_data (sec)->u.opd;
2836 return NULL;
2837 }
2838 \f
2839 /* Parameters for the qsort hook. */
2840 static bfd_boolean synthetic_relocatable;
2841
2842 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2843
2844 static int
2845 compare_symbols (const void *ap, const void *bp)
2846 {
2847 const asymbol *a = * (const asymbol **) ap;
2848 const asymbol *b = * (const asymbol **) bp;
2849
2850 /* Section symbols first. */
2851 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2852 return -1;
2853 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2854 return 1;
2855
2856 /* then .opd symbols. */
2857 if (strcmp (a->section->name, ".opd") == 0
2858 && strcmp (b->section->name, ".opd") != 0)
2859 return -1;
2860 if (strcmp (a->section->name, ".opd") != 0
2861 && strcmp (b->section->name, ".opd") == 0)
2862 return 1;
2863
2864 /* then other code symbols. */
2865 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2866 == (SEC_CODE | SEC_ALLOC)
2867 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2868 != (SEC_CODE | SEC_ALLOC))
2869 return -1;
2870
2871 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2872 != (SEC_CODE | SEC_ALLOC)
2873 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2874 == (SEC_CODE | SEC_ALLOC))
2875 return 1;
2876
2877 if (synthetic_relocatable)
2878 {
2879 if (a->section->id < b->section->id)
2880 return -1;
2881
2882 if (a->section->id > b->section->id)
2883 return 1;
2884 }
2885
2886 if (a->value + a->section->vma < b->value + b->section->vma)
2887 return -1;
2888
2889 if (a->value + a->section->vma > b->value + b->section->vma)
2890 return 1;
2891
2892 /* For syms with the same value, prefer strong dynamic global function
2893 syms over other syms. */
2894 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2895 return -1;
2896
2897 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2898 return 1;
2899
2900 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2901 return -1;
2902
2903 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2904 return 1;
2905
2906 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2907 return -1;
2908
2909 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2910 return 1;
2911
2912 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2913 return -1;
2914
2915 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2916 return 1;
2917
2918 return 0;
2919 }
2920
2921 /* Search SYMS for a symbol of the given VALUE. */
2922
2923 static asymbol *
2924 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2925 {
2926 long mid;
2927
2928 if (id == -1)
2929 {
2930 while (lo < hi)
2931 {
2932 mid = (lo + hi) >> 1;
2933 if (syms[mid]->value + syms[mid]->section->vma < value)
2934 lo = mid + 1;
2935 else if (syms[mid]->value + syms[mid]->section->vma > value)
2936 hi = mid;
2937 else
2938 return syms[mid];
2939 }
2940 }
2941 else
2942 {
2943 while (lo < hi)
2944 {
2945 mid = (lo + hi) >> 1;
2946 if (syms[mid]->section->id < id)
2947 lo = mid + 1;
2948 else if (syms[mid]->section->id > id)
2949 hi = mid;
2950 else if (syms[mid]->value < value)
2951 lo = mid + 1;
2952 else if (syms[mid]->value > value)
2953 hi = mid;
2954 else
2955 return syms[mid];
2956 }
2957 }
2958 return NULL;
2959 }
2960
2961 static bfd_boolean
2962 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2963 {
2964 bfd_vma vma = *(bfd_vma *) ptr;
2965 return ((section->flags & SEC_ALLOC) != 0
2966 && section->vma <= vma
2967 && vma < section->vma + section->size);
2968 }
2969
2970 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2971 entry syms. Also generate @plt symbols for the glink branch table. */
2972
2973 static long
2974 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2975 long static_count, asymbol **static_syms,
2976 long dyn_count, asymbol **dyn_syms,
2977 asymbol **ret)
2978 {
2979 asymbol *s;
2980 long i;
2981 long count;
2982 char *names;
2983 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2984 asection *opd;
2985 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2986 asymbol **syms;
2987
2988 *ret = NULL;
2989
2990 opd = bfd_get_section_by_name (abfd, ".opd");
2991 if (opd == NULL)
2992 return 0;
2993
2994 symcount = static_count;
2995 if (!relocatable)
2996 symcount += dyn_count;
2997 if (symcount == 0)
2998 return 0;
2999
3000 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3001 if (syms == NULL)
3002 return -1;
3003
3004 if (!relocatable && static_count != 0 && dyn_count != 0)
3005 {
3006 /* Use both symbol tables. */
3007 memcpy (syms, static_syms, static_count * sizeof (*syms));
3008 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3009 }
3010 else if (!relocatable && static_count == 0)
3011 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3012 else
3013 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3014
3015 synthetic_relocatable = relocatable;
3016 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3017
3018 if (!relocatable && symcount > 1)
3019 {
3020 long j;
3021 /* Trim duplicate syms, since we may have merged the normal and
3022 dynamic symbols. Actually, we only care about syms that have
3023 different values, so trim any with the same value. */
3024 for (i = 1, j = 1; i < symcount; ++i)
3025 if (syms[i - 1]->value + syms[i - 1]->section->vma
3026 != syms[i]->value + syms[i]->section->vma)
3027 syms[j++] = syms[i];
3028 symcount = j;
3029 }
3030
3031 i = 0;
3032 if (strcmp (syms[i]->section->name, ".opd") == 0)
3033 ++i;
3034 codesecsym = i;
3035
3036 for (; i < symcount; ++i)
3037 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3038 != (SEC_CODE | SEC_ALLOC))
3039 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3040 break;
3041 codesecsymend = i;
3042
3043 for (; i < symcount; ++i)
3044 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3045 break;
3046 secsymend = i;
3047
3048 for (; i < symcount; ++i)
3049 if (strcmp (syms[i]->section->name, ".opd") != 0)
3050 break;
3051 opdsymend = i;
3052
3053 for (; i < symcount; ++i)
3054 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3055 != (SEC_CODE | SEC_ALLOC))
3056 break;
3057 symcount = i;
3058
3059 count = 0;
3060
3061 if (relocatable)
3062 {
3063 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3064 arelent *r;
3065 size_t size;
3066 long relcount;
3067
3068 if (opdsymend == secsymend)
3069 goto done;
3070
3071 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3072 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3073 if (relcount == 0)
3074 goto done;
3075
3076 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3077 {
3078 count = -1;
3079 goto done;
3080 }
3081
3082 size = 0;
3083 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3084 {
3085 asymbol *sym;
3086
3087 while (r < opd->relocation + relcount
3088 && r->address < syms[i]->value + opd->vma)
3089 ++r;
3090
3091 if (r == opd->relocation + relcount)
3092 break;
3093
3094 if (r->address != syms[i]->value + opd->vma)
3095 continue;
3096
3097 if (r->howto->type != R_PPC64_ADDR64)
3098 continue;
3099
3100 sym = *r->sym_ptr_ptr;
3101 if (!sym_exists_at (syms, opdsymend, symcount,
3102 sym->section->id, sym->value + r->addend))
3103 {
3104 ++count;
3105 size += sizeof (asymbol);
3106 size += strlen (syms[i]->name) + 2;
3107 }
3108 }
3109
3110 s = *ret = bfd_malloc (size);
3111 if (s == NULL)
3112 {
3113 count = -1;
3114 goto done;
3115 }
3116
3117 names = (char *) (s + count);
3118
3119 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3120 {
3121 asymbol *sym;
3122
3123 while (r < opd->relocation + relcount
3124 && r->address < syms[i]->value + opd->vma)
3125 ++r;
3126
3127 if (r == opd->relocation + relcount)
3128 break;
3129
3130 if (r->address != syms[i]->value + opd->vma)
3131 continue;
3132
3133 if (r->howto->type != R_PPC64_ADDR64)
3134 continue;
3135
3136 sym = *r->sym_ptr_ptr;
3137 if (!sym_exists_at (syms, opdsymend, symcount,
3138 sym->section->id, sym->value + r->addend))
3139 {
3140 size_t len;
3141
3142 *s = *syms[i];
3143 s->flags |= BSF_SYNTHETIC;
3144 s->section = sym->section;
3145 s->value = sym->value + r->addend;
3146 s->name = names;
3147 *names++ = '.';
3148 len = strlen (syms[i]->name);
3149 memcpy (names, syms[i]->name, len + 1);
3150 names += len + 1;
3151 /* Have udata.p point back to the original symbol this
3152 synthetic symbol was derived from. */
3153 s->udata.p = syms[i];
3154 s++;
3155 }
3156 }
3157 }
3158 else
3159 {
3160 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3161 bfd_byte *contents;
3162 size_t size;
3163 long plt_count = 0;
3164 bfd_vma glink_vma = 0, resolv_vma = 0;
3165 asection *dynamic, *glink = NULL, *relplt = NULL;
3166 arelent *p;
3167
3168 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3169 {
3170 if (contents)
3171 {
3172 free_contents_and_exit:
3173 free (contents);
3174 }
3175 count = -1;
3176 goto done;
3177 }
3178
3179 size = 0;
3180 for (i = secsymend; i < opdsymend; ++i)
3181 {
3182 bfd_vma ent;
3183
3184 /* Ignore bogus symbols. */
3185 if (syms[i]->value > opd->size - 8)
3186 continue;
3187
3188 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3189 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3190 {
3191 ++count;
3192 size += sizeof (asymbol);
3193 size += strlen (syms[i]->name) + 2;
3194 }
3195 }
3196
3197 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3198 if (dyn_count != 0
3199 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3200 {
3201 bfd_byte *dynbuf, *extdyn, *extdynend;
3202 size_t extdynsize;
3203 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3204
3205 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3206 goto free_contents_and_exit;
3207
3208 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3209 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3210
3211 extdyn = dynbuf;
3212 extdynend = extdyn + dynamic->size;
3213 for (; extdyn < extdynend; extdyn += extdynsize)
3214 {
3215 Elf_Internal_Dyn dyn;
3216 (*swap_dyn_in) (abfd, extdyn, &dyn);
3217
3218 if (dyn.d_tag == DT_NULL)
3219 break;
3220
3221 if (dyn.d_tag == DT_PPC64_GLINK)
3222 {
3223 /* The first glink stub starts at offset 32; see comment in
3224 ppc64_elf_finish_dynamic_sections. */
3225 glink_vma = dyn.d_un.d_val + 32;
3226 /* The .glink section usually does not survive the final
3227 link; search for the section (usually .text) where the
3228 glink stubs now reside. */
3229 glink = bfd_sections_find_if (abfd, section_covers_vma,
3230 &glink_vma);
3231 break;
3232 }
3233 }
3234
3235 free (dynbuf);
3236 }
3237
3238 if (glink != NULL)
3239 {
3240 /* Determine __glink trampoline by reading the relative branch
3241 from the first glink stub. */
3242 bfd_byte buf[4];
3243 if (bfd_get_section_contents (abfd, glink, buf,
3244 glink_vma + 4 - glink->vma, 4))
3245 {
3246 unsigned int insn = bfd_get_32 (abfd, buf);
3247 insn ^= B_DOT;
3248 if ((insn & ~0x3fffffc) == 0)
3249 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3250 }
3251
3252 if (resolv_vma)
3253 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3254
3255 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3256 if (relplt != NULL)
3257 {
3258 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3259 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3260 goto free_contents_and_exit;
3261
3262 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3263 size += plt_count * sizeof (asymbol);
3264
3265 p = relplt->relocation;
3266 for (i = 0; i < plt_count; i++, p++)
3267 {
3268 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3269 if (p->addend != 0)
3270 size += sizeof ("+0x") - 1 + 16;
3271 }
3272 }
3273 }
3274
3275 s = *ret = bfd_malloc (size);
3276 if (s == NULL)
3277 goto free_contents_and_exit;
3278
3279 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3280
3281 for (i = secsymend; i < opdsymend; ++i)
3282 {
3283 bfd_vma ent;
3284
3285 if (syms[i]->value > opd->size - 8)
3286 continue;
3287
3288 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3289 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3290 {
3291 long lo, hi;
3292 size_t len;
3293 asection *sec = abfd->sections;
3294
3295 *s = *syms[i];
3296 lo = codesecsym;
3297 hi = codesecsymend;
3298 while (lo < hi)
3299 {
3300 long mid = (lo + hi) >> 1;
3301 if (syms[mid]->section->vma < ent)
3302 lo = mid + 1;
3303 else if (syms[mid]->section->vma > ent)
3304 hi = mid;
3305 else
3306 {
3307 sec = syms[mid]->section;
3308 break;
3309 }
3310 }
3311
3312 if (lo >= hi && lo > codesecsym)
3313 sec = syms[lo - 1]->section;
3314
3315 for (; sec != NULL; sec = sec->next)
3316 {
3317 if (sec->vma > ent)
3318 break;
3319 if ((sec->flags & SEC_ALLOC) == 0
3320 || (sec->flags & SEC_LOAD) == 0)
3321 break;
3322 if ((sec->flags & SEC_CODE) != 0)
3323 s->section = sec;
3324 }
3325 s->flags |= BSF_SYNTHETIC;
3326 s->value = ent - s->section->vma;
3327 s->name = names;
3328 *names++ = '.';
3329 len = strlen (syms[i]->name);
3330 memcpy (names, syms[i]->name, len + 1);
3331 names += len + 1;
3332 /* Have udata.p point back to the original symbol this
3333 synthetic symbol was derived from. */
3334 s->udata.p = syms[i];
3335 s++;
3336 }
3337 }
3338 free (contents);
3339
3340 if (glink != NULL && relplt != NULL)
3341 {
3342 if (resolv_vma)
3343 {
3344 /* Add a symbol for the main glink trampoline. */
3345 memset (s, 0, sizeof *s);
3346 s->the_bfd = abfd;
3347 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3348 s->section = glink;
3349 s->value = resolv_vma - glink->vma;
3350 s->name = names;
3351 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3352 names += sizeof ("__glink_PLTresolve");
3353 s++;
3354 count++;
3355 }
3356
3357 /* FIXME: It would be very much nicer to put sym@plt on the
3358 stub rather than on the glink branch table entry. The
3359 objdump disassembler would then use a sensible symbol
3360 name on plt calls. The difficulty in doing so is
3361 a) finding the stubs, and,
3362 b) matching stubs against plt entries, and,
3363 c) there can be multiple stubs for a given plt entry.
3364
3365 Solving (a) could be done by code scanning, but older
3366 ppc64 binaries used different stubs to current code.
3367 (b) is the tricky one since you need to known the toc
3368 pointer for at least one function that uses a pic stub to
3369 be able to calculate the plt address referenced.
3370 (c) means gdb would need to set multiple breakpoints (or
3371 find the glink branch itself) when setting breakpoints
3372 for pending shared library loads. */
3373 p = relplt->relocation;
3374 for (i = 0; i < plt_count; i++, p++)
3375 {
3376 size_t len;
3377
3378 *s = **p->sym_ptr_ptr;
3379 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3380 we are defining a symbol, ensure one of them is set. */
3381 if ((s->flags & BSF_LOCAL) == 0)
3382 s->flags |= BSF_GLOBAL;
3383 s->flags |= BSF_SYNTHETIC;
3384 s->section = glink;
3385 s->value = glink_vma - glink->vma;
3386 s->name = names;
3387 s->udata.p = NULL;
3388 len = strlen ((*p->sym_ptr_ptr)->name);
3389 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3390 names += len;
3391 if (p->addend != 0)
3392 {
3393 memcpy (names, "+0x", sizeof ("+0x") - 1);
3394 names += sizeof ("+0x") - 1;
3395 bfd_sprintf_vma (abfd, names, p->addend);
3396 names += strlen (names);
3397 }
3398 memcpy (names, "@plt", sizeof ("@plt"));
3399 names += sizeof ("@plt");
3400 s++;
3401 glink_vma += 8;
3402 if (i >= 0x8000)
3403 glink_vma += 4;
3404 }
3405 count += plt_count;
3406 }
3407 }
3408
3409 done:
3410 free (syms);
3411 return count;
3412 }
3413 \f
3414 /* The following functions are specific to the ELF linker, while
3415 functions above are used generally. Those named ppc64_elf_* are
3416 called by the main ELF linker code. They appear in this file more
3417 or less in the order in which they are called. eg.
3418 ppc64_elf_check_relocs is called early in the link process,
3419 ppc64_elf_finish_dynamic_sections is one of the last functions
3420 called.
3421
3422 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3423 functions have both a function code symbol and a function descriptor
3424 symbol. A call to foo in a relocatable object file looks like:
3425
3426 . .text
3427 . x:
3428 . bl .foo
3429 . nop
3430
3431 The function definition in another object file might be:
3432
3433 . .section .opd
3434 . foo: .quad .foo
3435 . .quad .TOC.@tocbase
3436 . .quad 0
3437 .
3438 . .text
3439 . .foo: blr
3440
3441 When the linker resolves the call during a static link, the branch
3442 unsurprisingly just goes to .foo and the .opd information is unused.
3443 If the function definition is in a shared library, things are a little
3444 different: The call goes via a plt call stub, the opd information gets
3445 copied to the plt, and the linker patches the nop.
3446
3447 . x:
3448 . bl .foo_stub
3449 . ld 2,40(1)
3450 .
3451 .
3452 . .foo_stub:
3453 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3454 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3455 . std 2,40(1) # this is the general idea
3456 . ld 11,0(12)
3457 . ld 2,8(12)
3458 . mtctr 11
3459 . ld 11,16(12)
3460 . bctr
3461 .
3462 . .section .plt
3463 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3464
3465 The "reloc ()" notation is supposed to indicate that the linker emits
3466 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3467 copying.
3468
3469 What are the difficulties here? Well, firstly, the relocations
3470 examined by the linker in check_relocs are against the function code
3471 sym .foo, while the dynamic relocation in the plt is emitted against
3472 the function descriptor symbol, foo. Somewhere along the line, we need
3473 to carefully copy dynamic link information from one symbol to the other.
3474 Secondly, the generic part of the elf linker will make .foo a dynamic
3475 symbol as is normal for most other backends. We need foo dynamic
3476 instead, at least for an application final link. However, when
3477 creating a shared library containing foo, we need to have both symbols
3478 dynamic so that references to .foo are satisfied during the early
3479 stages of linking. Otherwise the linker might decide to pull in a
3480 definition from some other object, eg. a static library.
3481
3482 Update: As of August 2004, we support a new convention. Function
3483 calls may use the function descriptor symbol, ie. "bl foo". This
3484 behaves exactly as "bl .foo". */
3485
3486 /* The linker needs to keep track of the number of relocs that it
3487 decides to copy as dynamic relocs in check_relocs for each symbol.
3488 This is so that it can later discard them if they are found to be
3489 unnecessary. We store the information in a field extending the
3490 regular ELF linker hash table. */
3491
3492 struct ppc_dyn_relocs
3493 {
3494 struct ppc_dyn_relocs *next;
3495
3496 /* The input section of the reloc. */
3497 asection *sec;
3498
3499 /* Total number of relocs copied for the input section. */
3500 bfd_size_type count;
3501
3502 /* Number of pc-relative relocs copied for the input section. */
3503 bfd_size_type pc_count;
3504 };
3505
3506 /* Of those relocs that might be copied as dynamic relocs, this function
3507 selects those that must be copied when linking a shared library,
3508 even when the symbol is local. */
3509
3510 static int
3511 must_be_dyn_reloc (struct bfd_link_info *info,
3512 enum elf_ppc64_reloc_type r_type)
3513 {
3514 switch (r_type)
3515 {
3516 default:
3517 return 1;
3518
3519 case R_PPC64_REL32:
3520 case R_PPC64_REL64:
3521 case R_PPC64_REL30:
3522 return 0;
3523
3524 case R_PPC64_TPREL16:
3525 case R_PPC64_TPREL16_LO:
3526 case R_PPC64_TPREL16_HI:
3527 case R_PPC64_TPREL16_HA:
3528 case R_PPC64_TPREL16_DS:
3529 case R_PPC64_TPREL16_LO_DS:
3530 case R_PPC64_TPREL16_HIGHER:
3531 case R_PPC64_TPREL16_HIGHERA:
3532 case R_PPC64_TPREL16_HIGHEST:
3533 case R_PPC64_TPREL16_HIGHESTA:
3534 case R_PPC64_TPREL64:
3535 return !info->executable;
3536 }
3537 }
3538
3539 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3540 copying dynamic variables from a shared lib into an app's dynbss
3541 section, and instead use a dynamic relocation to point into the
3542 shared lib. With code that gcc generates, it's vital that this be
3543 enabled; In the PowerPC64 ABI, the address of a function is actually
3544 the address of a function descriptor, which resides in the .opd
3545 section. gcc uses the descriptor directly rather than going via the
3546 GOT as some other ABI's do, which means that initialized function
3547 pointers must reference the descriptor. Thus, a function pointer
3548 initialized to the address of a function in a shared library will
3549 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3550 redefines the function descriptor symbol to point to the copy. This
3551 presents a problem as a plt entry for that function is also
3552 initialized from the function descriptor symbol and the copy reloc
3553 may not be initialized first. */
3554 #define ELIMINATE_COPY_RELOCS 1
3555
3556 /* Section name for stubs is the associated section name plus this
3557 string. */
3558 #define STUB_SUFFIX ".stub"
3559
3560 /* Linker stubs.
3561 ppc_stub_long_branch:
3562 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3563 destination, but a 24 bit branch in a stub section will reach.
3564 . b dest
3565
3566 ppc_stub_plt_branch:
3567 Similar to the above, but a 24 bit branch in the stub section won't
3568 reach its destination.
3569 . addis %r12,%r2,xxx@toc@ha
3570 . ld %r11,xxx@toc@l(%r12)
3571 . mtctr %r11
3572 . bctr
3573
3574 ppc_stub_plt_call:
3575 Used to call a function in a shared library. If it so happens that
3576 the plt entry referenced crosses a 64k boundary, then an extra
3577 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3578 . addis %r12,%r2,xxx@toc@ha
3579 . std %r2,40(%r1)
3580 . ld %r11,xxx+0@toc@l(%r12)
3581 . mtctr %r11
3582 . ld %r2,xxx+8@toc@l(%r12)
3583 . ld %r11,xxx+16@toc@l(%r12)
3584 . bctr
3585
3586 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3587 code to adjust the value and save r2 to support multiple toc sections.
3588 A ppc_stub_long_branch with an r2 offset looks like:
3589 . std %r2,40(%r1)
3590 . addis %r2,%r2,off@ha
3591 . addi %r2,%r2,off@l
3592 . b dest
3593
3594 A ppc_stub_plt_branch with an r2 offset looks like:
3595 . std %r2,40(%r1)
3596 . addis %r12,%r2,xxx@toc@ha
3597 . ld %r11,xxx@toc@l(%r12)
3598 . addis %r2,%r2,off@ha
3599 . addi %r2,%r2,off@l
3600 . mtctr %r11
3601 . bctr
3602
3603 In cases where the "addis" instruction would add zero, the "addis" is
3604 omitted and following instructions modified slightly in some cases.
3605 */
3606
3607 enum ppc_stub_type {
3608 ppc_stub_none,
3609 ppc_stub_long_branch,
3610 ppc_stub_long_branch_r2off,
3611 ppc_stub_plt_branch,
3612 ppc_stub_plt_branch_r2off,
3613 ppc_stub_plt_call
3614 };
3615
3616 struct ppc_stub_hash_entry {
3617
3618 /* Base hash table entry structure. */
3619 struct bfd_hash_entry root;
3620
3621 enum ppc_stub_type stub_type;
3622
3623 /* The stub section. */
3624 asection *stub_sec;
3625
3626 /* Offset within stub_sec of the beginning of this stub. */
3627 bfd_vma stub_offset;
3628
3629 /* Given the symbol's value and its section we can determine its final
3630 value when building the stubs (so the stub knows where to jump. */
3631 bfd_vma target_value;
3632 asection *target_section;
3633
3634 /* The symbol table entry, if any, that this was derived from. */
3635 struct ppc_link_hash_entry *h;
3636 struct plt_entry *plt_ent;
3637
3638 /* And the reloc addend that this was derived from. */
3639 bfd_vma addend;
3640
3641 /* Where this stub is being called from, or, in the case of combined
3642 stub sections, the first input section in the group. */
3643 asection *id_sec;
3644 };
3645
3646 struct ppc_branch_hash_entry {
3647
3648 /* Base hash table entry structure. */
3649 struct bfd_hash_entry root;
3650
3651 /* Offset within branch lookup table. */
3652 unsigned int offset;
3653
3654 /* Generation marker. */
3655 unsigned int iter;
3656 };
3657
3658 struct ppc_link_hash_entry
3659 {
3660 struct elf_link_hash_entry elf;
3661
3662 union {
3663 /* A pointer to the most recently used stub hash entry against this
3664 symbol. */
3665 struct ppc_stub_hash_entry *stub_cache;
3666
3667 /* A pointer to the next symbol starting with a '.' */
3668 struct ppc_link_hash_entry *next_dot_sym;
3669 } u;
3670
3671 /* Track dynamic relocs copied for this symbol. */
3672 struct ppc_dyn_relocs *dyn_relocs;
3673
3674 /* Link between function code and descriptor symbols. */
3675 struct ppc_link_hash_entry *oh;
3676
3677 /* Flag function code and descriptor symbols. */
3678 unsigned int is_func:1;
3679 unsigned int is_func_descriptor:1;
3680 unsigned int fake:1;
3681
3682 /* Whether global opd/toc sym has been adjusted or not.
3683 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3684 should be set for all globals defined in any opd/toc section. */
3685 unsigned int adjust_done:1;
3686
3687 /* Set if we twiddled this symbol to weak at some stage. */
3688 unsigned int was_undefined:1;
3689
3690 /* Contexts in which symbol is used in the GOT (or TOC).
3691 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3692 corresponding relocs are encountered during check_relocs.
3693 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3694 indicate the corresponding GOT entry type is not needed.
3695 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3696 a TPREL one. We use a separate flag rather than setting TPREL
3697 just for convenience in distinguishing the two cases. */
3698 #define TLS_GD 1 /* GD reloc. */
3699 #define TLS_LD 2 /* LD reloc. */
3700 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3701 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3702 #define TLS_TLS 16 /* Any TLS reloc. */
3703 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3704 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3705 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3706 unsigned char tls_mask;
3707 };
3708
3709 /* ppc64 ELF linker hash table. */
3710
3711 struct ppc_link_hash_table
3712 {
3713 struct elf_link_hash_table elf;
3714
3715 /* The stub hash table. */
3716 struct bfd_hash_table stub_hash_table;
3717
3718 /* Another hash table for plt_branch stubs. */
3719 struct bfd_hash_table branch_hash_table;
3720
3721 /* Linker stub bfd. */
3722 bfd *stub_bfd;
3723
3724 /* Linker call-backs. */
3725 asection * (*add_stub_section) (const char *, asection *);
3726 void (*layout_sections_again) (void);
3727
3728 /* Array to keep track of which stub sections have been created, and
3729 information on stub grouping. */
3730 struct map_stub {
3731 /* This is the section to which stubs in the group will be attached. */
3732 asection *link_sec;
3733 /* The stub section. */
3734 asection *stub_sec;
3735 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3736 bfd_vma toc_off;
3737 } *stub_group;
3738
3739 /* Temp used when calculating TOC pointers. */
3740 bfd_vma toc_curr;
3741 bfd *toc_bfd;
3742 asection *toc_first_sec;
3743
3744 /* Highest input section id. */
3745 int top_id;
3746
3747 /* Highest output section index. */
3748 int top_index;
3749
3750 /* Used when adding symbols. */
3751 struct ppc_link_hash_entry *dot_syms;
3752
3753 /* List of input sections for each output section. */
3754 asection **input_list;
3755
3756 /* Short-cuts to get to dynamic linker sections. */
3757 asection *got;
3758 asection *plt;
3759 asection *relplt;
3760 asection *iplt;
3761 asection *reliplt;
3762 asection *dynbss;
3763 asection *relbss;
3764 asection *glink;
3765 asection *sfpr;
3766 asection *brlt;
3767 asection *relbrlt;
3768
3769 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3770 struct ppc_link_hash_entry *tls_get_addr;
3771 struct ppc_link_hash_entry *tls_get_addr_fd;
3772
3773 /* The size of reliplt used by got entry relocs. */
3774 bfd_size_type got_reli_size;
3775
3776 /* Statistics. */
3777 unsigned long stub_count[ppc_stub_plt_call];
3778
3779 /* Number of stubs against global syms. */
3780 unsigned long stub_globals;
3781
3782 /* Set if we should emit symbols for stubs. */
3783 unsigned int emit_stub_syms:1;
3784
3785 /* Set if __tls_get_addr optimization should not be done. */
3786 unsigned int no_tls_get_addr_opt:1;
3787
3788 /* Support for multiple toc sections. */
3789 unsigned int do_multi_toc:1;
3790 unsigned int multi_toc_needed:1;
3791 unsigned int second_toc_pass:1;
3792 unsigned int do_toc_opt:1;
3793
3794 /* Set on error. */
3795 unsigned int stub_error:1;
3796
3797 /* Temp used by ppc64_elf_process_dot_syms. */
3798 unsigned int twiddled_syms:1;
3799
3800 /* Incremented every time we size stubs. */
3801 unsigned int stub_iteration;
3802
3803 /* Small local sym cache. */
3804 struct sym_cache sym_cache;
3805 };
3806
3807 /* Rename some of the generic section flags to better document how they
3808 are used here. */
3809
3810 /* Nonzero if this section has TLS related relocations. */
3811 #define has_tls_reloc sec_flg0
3812
3813 /* Nonzero if this section has a call to __tls_get_addr. */
3814 #define has_tls_get_addr_call sec_flg1
3815
3816 /* Nonzero if this section has any toc or got relocs. */
3817 #define has_toc_reloc sec_flg2
3818
3819 /* Nonzero if this section has a call to another section that uses
3820 the toc or got. */
3821 #define makes_toc_func_call sec_flg3
3822
3823 /* Recursion protection when determining above flag. */
3824 #define call_check_in_progress sec_flg4
3825 #define call_check_done sec_flg5
3826
3827 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3828
3829 #define ppc_hash_table(p) \
3830 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3831 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3832
3833 #define ppc_stub_hash_lookup(table, string, create, copy) \
3834 ((struct ppc_stub_hash_entry *) \
3835 bfd_hash_lookup ((table), (string), (create), (copy)))
3836
3837 #define ppc_branch_hash_lookup(table, string, create, copy) \
3838 ((struct ppc_branch_hash_entry *) \
3839 bfd_hash_lookup ((table), (string), (create), (copy)))
3840
3841 /* Create an entry in the stub hash table. */
3842
3843 static struct bfd_hash_entry *
3844 stub_hash_newfunc (struct bfd_hash_entry *entry,
3845 struct bfd_hash_table *table,
3846 const char *string)
3847 {
3848 /* Allocate the structure if it has not already been allocated by a
3849 subclass. */
3850 if (entry == NULL)
3851 {
3852 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3853 if (entry == NULL)
3854 return entry;
3855 }
3856
3857 /* Call the allocation method of the superclass. */
3858 entry = bfd_hash_newfunc (entry, table, string);
3859 if (entry != NULL)
3860 {
3861 struct ppc_stub_hash_entry *eh;
3862
3863 /* Initialize the local fields. */
3864 eh = (struct ppc_stub_hash_entry *) entry;
3865 eh->stub_type = ppc_stub_none;
3866 eh->stub_sec = NULL;
3867 eh->stub_offset = 0;
3868 eh->target_value = 0;
3869 eh->target_section = NULL;
3870 eh->h = NULL;
3871 eh->id_sec = NULL;
3872 }
3873
3874 return entry;
3875 }
3876
3877 /* Create an entry in the branch hash table. */
3878
3879 static struct bfd_hash_entry *
3880 branch_hash_newfunc (struct bfd_hash_entry *entry,
3881 struct bfd_hash_table *table,
3882 const char *string)
3883 {
3884 /* Allocate the structure if it has not already been allocated by a
3885 subclass. */
3886 if (entry == NULL)
3887 {
3888 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3889 if (entry == NULL)
3890 return entry;
3891 }
3892
3893 /* Call the allocation method of the superclass. */
3894 entry = bfd_hash_newfunc (entry, table, string);
3895 if (entry != NULL)
3896 {
3897 struct ppc_branch_hash_entry *eh;
3898
3899 /* Initialize the local fields. */
3900 eh = (struct ppc_branch_hash_entry *) entry;
3901 eh->offset = 0;
3902 eh->iter = 0;
3903 }
3904
3905 return entry;
3906 }
3907
3908 /* Create an entry in a ppc64 ELF linker hash table. */
3909
3910 static struct bfd_hash_entry *
3911 link_hash_newfunc (struct bfd_hash_entry *entry,
3912 struct bfd_hash_table *table,
3913 const char *string)
3914 {
3915 /* Allocate the structure if it has not already been allocated by a
3916 subclass. */
3917 if (entry == NULL)
3918 {
3919 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3920 if (entry == NULL)
3921 return entry;
3922 }
3923
3924 /* Call the allocation method of the superclass. */
3925 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3926 if (entry != NULL)
3927 {
3928 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3929
3930 memset (&eh->u.stub_cache, 0,
3931 (sizeof (struct ppc_link_hash_entry)
3932 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3933
3934 /* When making function calls, old ABI code references function entry
3935 points (dot symbols), while new ABI code references the function
3936 descriptor symbol. We need to make any combination of reference and
3937 definition work together, without breaking archive linking.
3938
3939 For a defined function "foo" and an undefined call to "bar":
3940 An old object defines "foo" and ".foo", references ".bar" (possibly
3941 "bar" too).
3942 A new object defines "foo" and references "bar".
3943
3944 A new object thus has no problem with its undefined symbols being
3945 satisfied by definitions in an old object. On the other hand, the
3946 old object won't have ".bar" satisfied by a new object.
3947
3948 Keep a list of newly added dot-symbols. */
3949
3950 if (string[0] == '.')
3951 {
3952 struct ppc_link_hash_table *htab;
3953
3954 htab = (struct ppc_link_hash_table *) table;
3955 eh->u.next_dot_sym = htab->dot_syms;
3956 htab->dot_syms = eh;
3957 }
3958 }
3959
3960 return entry;
3961 }
3962
3963 /* Create a ppc64 ELF linker hash table. */
3964
3965 static struct bfd_link_hash_table *
3966 ppc64_elf_link_hash_table_create (bfd *abfd)
3967 {
3968 struct ppc_link_hash_table *htab;
3969 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3970
3971 htab = bfd_zmalloc (amt);
3972 if (htab == NULL)
3973 return NULL;
3974
3975 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3976 sizeof (struct ppc_link_hash_entry),
3977 PPC64_ELF_DATA))
3978 {
3979 free (htab);
3980 return NULL;
3981 }
3982
3983 /* Init the stub hash table too. */
3984 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3985 sizeof (struct ppc_stub_hash_entry)))
3986 return NULL;
3987
3988 /* And the branch hash table. */
3989 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3990 sizeof (struct ppc_branch_hash_entry)))
3991 return NULL;
3992
3993 /* Initializing two fields of the union is just cosmetic. We really
3994 only care about glist, but when compiled on a 32-bit host the
3995 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3996 debugger inspection of these fields look nicer. */
3997 htab->elf.init_got_refcount.refcount = 0;
3998 htab->elf.init_got_refcount.glist = NULL;
3999 htab->elf.init_plt_refcount.refcount = 0;
4000 htab->elf.init_plt_refcount.glist = NULL;
4001 htab->elf.init_got_offset.offset = 0;
4002 htab->elf.init_got_offset.glist = NULL;
4003 htab->elf.init_plt_offset.offset = 0;
4004 htab->elf.init_plt_offset.glist = NULL;
4005
4006 return &htab->elf.root;
4007 }
4008
4009 /* Free the derived linker hash table. */
4010
4011 static void
4012 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4013 {
4014 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
4015
4016 bfd_hash_table_free (&ret->stub_hash_table);
4017 bfd_hash_table_free (&ret->branch_hash_table);
4018 _bfd_generic_link_hash_table_free (hash);
4019 }
4020
4021 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4022
4023 void
4024 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4025 {
4026 struct ppc_link_hash_table *htab;
4027
4028 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4029
4030 /* Always hook our dynamic sections into the first bfd, which is the
4031 linker created stub bfd. This ensures that the GOT header is at
4032 the start of the output TOC section. */
4033 htab = ppc_hash_table (info);
4034 if (htab == NULL)
4035 return;
4036 htab->stub_bfd = abfd;
4037 htab->elf.dynobj = abfd;
4038 }
4039
4040 /* Build a name for an entry in the stub hash table. */
4041
4042 static char *
4043 ppc_stub_name (const asection *input_section,
4044 const asection *sym_sec,
4045 const struct ppc_link_hash_entry *h,
4046 const Elf_Internal_Rela *rel)
4047 {
4048 char *stub_name;
4049 bfd_size_type len;
4050
4051 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4052 offsets from a sym as a branch target? In fact, we could
4053 probably assume the addend is always zero. */
4054 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4055
4056 if (h)
4057 {
4058 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4059 stub_name = bfd_malloc (len);
4060 if (stub_name == NULL)
4061 return stub_name;
4062
4063 sprintf (stub_name, "%08x.%s+%x",
4064 input_section->id & 0xffffffff,
4065 h->elf.root.root.string,
4066 (int) rel->r_addend & 0xffffffff);
4067 }
4068 else
4069 {
4070 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4071 stub_name = bfd_malloc (len);
4072 if (stub_name == NULL)
4073 return stub_name;
4074
4075 sprintf (stub_name, "%08x.%x:%x+%x",
4076 input_section->id & 0xffffffff,
4077 sym_sec->id & 0xffffffff,
4078 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4079 (int) rel->r_addend & 0xffffffff);
4080 }
4081 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4082 stub_name[len - 2] = 0;
4083 return stub_name;
4084 }
4085
4086 /* Look up an entry in the stub hash. Stub entries are cached because
4087 creating the stub name takes a bit of time. */
4088
4089 static struct ppc_stub_hash_entry *
4090 ppc_get_stub_entry (const asection *input_section,
4091 const asection *sym_sec,
4092 struct ppc_link_hash_entry *h,
4093 const Elf_Internal_Rela *rel,
4094 struct ppc_link_hash_table *htab)
4095 {
4096 struct ppc_stub_hash_entry *stub_entry;
4097 const asection *id_sec;
4098
4099 /* If this input section is part of a group of sections sharing one
4100 stub section, then use the id of the first section in the group.
4101 Stub names need to include a section id, as there may well be
4102 more than one stub used to reach say, printf, and we need to
4103 distinguish between them. */
4104 id_sec = htab->stub_group[input_section->id].link_sec;
4105
4106 if (h != NULL && h->u.stub_cache != NULL
4107 && h->u.stub_cache->h == h
4108 && h->u.stub_cache->id_sec == id_sec)
4109 {
4110 stub_entry = h->u.stub_cache;
4111 }
4112 else
4113 {
4114 char *stub_name;
4115
4116 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4117 if (stub_name == NULL)
4118 return NULL;
4119
4120 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4121 stub_name, FALSE, FALSE);
4122 if (h != NULL)
4123 h->u.stub_cache = stub_entry;
4124
4125 free (stub_name);
4126 }
4127
4128 return stub_entry;
4129 }
4130
4131 /* Add a new stub entry to the stub hash. Not all fields of the new
4132 stub entry are initialised. */
4133
4134 static struct ppc_stub_hash_entry *
4135 ppc_add_stub (const char *stub_name,
4136 asection *section,
4137 struct ppc_link_hash_table *htab)
4138 {
4139 asection *link_sec;
4140 asection *stub_sec;
4141 struct ppc_stub_hash_entry *stub_entry;
4142
4143 link_sec = htab->stub_group[section->id].link_sec;
4144 stub_sec = htab->stub_group[section->id].stub_sec;
4145 if (stub_sec == NULL)
4146 {
4147 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4148 if (stub_sec == NULL)
4149 {
4150 size_t namelen;
4151 bfd_size_type len;
4152 char *s_name;
4153
4154 namelen = strlen (link_sec->name);
4155 len = namelen + sizeof (STUB_SUFFIX);
4156 s_name = bfd_alloc (htab->stub_bfd, len);
4157 if (s_name == NULL)
4158 return NULL;
4159
4160 memcpy (s_name, link_sec->name, namelen);
4161 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4162 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4163 if (stub_sec == NULL)
4164 return NULL;
4165 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4166 }
4167 htab->stub_group[section->id].stub_sec = stub_sec;
4168 }
4169
4170 /* Enter this entry into the linker stub hash table. */
4171 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4172 TRUE, FALSE);
4173 if (stub_entry == NULL)
4174 {
4175 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4176 section->owner, stub_name);
4177 return NULL;
4178 }
4179
4180 stub_entry->stub_sec = stub_sec;
4181 stub_entry->stub_offset = 0;
4182 stub_entry->id_sec = link_sec;
4183 return stub_entry;
4184 }
4185
4186 /* Create sections for linker generated code. */
4187
4188 static bfd_boolean
4189 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4190 {
4191 struct ppc_link_hash_table *htab;
4192 flagword flags;
4193
4194 htab = ppc_hash_table (info);
4195 if (htab == NULL)
4196 return FALSE;
4197
4198 /* Create .sfpr for code to save and restore fp regs. */
4199 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4200 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4201 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4202 flags);
4203 if (htab->sfpr == NULL
4204 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4205 return FALSE;
4206
4207 /* Create .glink for lazy dynamic linking support. */
4208 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4209 flags);
4210 if (htab->glink == NULL
4211 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4212 return FALSE;
4213
4214 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4215 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4216 if (htab->iplt == NULL
4217 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4218 return FALSE;
4219
4220 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4221 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4222 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4223 ".rela.iplt",
4224 flags);
4225 if (htab->reliplt == NULL
4226 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4227 return FALSE;
4228
4229 /* Create branch lookup table for plt_branch stubs. */
4230 flags = (SEC_ALLOC | SEC_LOAD
4231 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4232 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4233 flags);
4234 if (htab->brlt == NULL
4235 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4236 return FALSE;
4237
4238 if (!info->shared)
4239 return TRUE;
4240
4241 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4242 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4243 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4244 ".rela.branch_lt",
4245 flags);
4246 if (htab->relbrlt == NULL
4247 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4248 return FALSE;
4249
4250 return TRUE;
4251 }
4252
4253 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4254 not already done. */
4255
4256 static bfd_boolean
4257 create_got_section (bfd *abfd, struct bfd_link_info *info)
4258 {
4259 asection *got, *relgot;
4260 flagword flags;
4261 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4262
4263 if (!is_ppc64_elf (abfd))
4264 return FALSE;
4265 if (htab == NULL)
4266 return FALSE;
4267
4268 if (!htab->got)
4269 {
4270 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4271 return FALSE;
4272
4273 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4274 if (!htab->got)
4275 abort ();
4276 }
4277
4278 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4279 | SEC_LINKER_CREATED);
4280
4281 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4282 if (!got
4283 || !bfd_set_section_alignment (abfd, got, 3))
4284 return FALSE;
4285
4286 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4287 flags | SEC_READONLY);
4288 if (!relgot
4289 || ! bfd_set_section_alignment (abfd, relgot, 3))
4290 return FALSE;
4291
4292 ppc64_elf_tdata (abfd)->got = got;
4293 ppc64_elf_tdata (abfd)->relgot = relgot;
4294 return TRUE;
4295 }
4296
4297 /* Create the dynamic sections, and set up shortcuts. */
4298
4299 static bfd_boolean
4300 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4301 {
4302 struct ppc_link_hash_table *htab;
4303
4304 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4305 return FALSE;
4306
4307 htab = ppc_hash_table (info);
4308 if (htab == NULL)
4309 return FALSE;
4310
4311 if (!htab->got)
4312 htab->got = bfd_get_section_by_name (dynobj, ".got");
4313 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4314 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4315 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4316 if (!info->shared)
4317 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4318
4319 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4320 || (!info->shared && !htab->relbss))
4321 abort ();
4322
4323 return TRUE;
4324 }
4325
4326 /* Follow indirect and warning symbol links. */
4327
4328 static inline struct bfd_link_hash_entry *
4329 follow_link (struct bfd_link_hash_entry *h)
4330 {
4331 while (h->type == bfd_link_hash_indirect
4332 || h->type == bfd_link_hash_warning)
4333 h = h->u.i.link;
4334 return h;
4335 }
4336
4337 static inline struct elf_link_hash_entry *
4338 elf_follow_link (struct elf_link_hash_entry *h)
4339 {
4340 return (struct elf_link_hash_entry *) follow_link (&h->root);
4341 }
4342
4343 static inline struct ppc_link_hash_entry *
4344 ppc_follow_link (struct ppc_link_hash_entry *h)
4345 {
4346 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4347 }
4348
4349 /* Merge PLT info on FROM with that on TO. */
4350
4351 static void
4352 move_plt_plist (struct ppc_link_hash_entry *from,
4353 struct ppc_link_hash_entry *to)
4354 {
4355 if (from->elf.plt.plist != NULL)
4356 {
4357 if (to->elf.plt.plist != NULL)
4358 {
4359 struct plt_entry **entp;
4360 struct plt_entry *ent;
4361
4362 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4363 {
4364 struct plt_entry *dent;
4365
4366 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4367 if (dent->addend == ent->addend)
4368 {
4369 dent->plt.refcount += ent->plt.refcount;
4370 *entp = ent->next;
4371 break;
4372 }
4373 if (dent == NULL)
4374 entp = &ent->next;
4375 }
4376 *entp = to->elf.plt.plist;
4377 }
4378
4379 to->elf.plt.plist = from->elf.plt.plist;
4380 from->elf.plt.plist = NULL;
4381 }
4382 }
4383
4384 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4385
4386 static void
4387 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4388 struct elf_link_hash_entry *dir,
4389 struct elf_link_hash_entry *ind)
4390 {
4391 struct ppc_link_hash_entry *edir, *eind;
4392
4393 edir = (struct ppc_link_hash_entry *) dir;
4394 eind = (struct ppc_link_hash_entry *) ind;
4395
4396 /* Copy over any dynamic relocs we may have on the indirect sym. */
4397 if (eind->dyn_relocs != NULL)
4398 {
4399 if (edir->dyn_relocs != NULL)
4400 {
4401 struct ppc_dyn_relocs **pp;
4402 struct ppc_dyn_relocs *p;
4403
4404 /* Add reloc counts against the indirect sym to the direct sym
4405 list. Merge any entries against the same section. */
4406 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4407 {
4408 struct ppc_dyn_relocs *q;
4409
4410 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4411 if (q->sec == p->sec)
4412 {
4413 q->pc_count += p->pc_count;
4414 q->count += p->count;
4415 *pp = p->next;
4416 break;
4417 }
4418 if (q == NULL)
4419 pp = &p->next;
4420 }
4421 *pp = edir->dyn_relocs;
4422 }
4423
4424 edir->dyn_relocs = eind->dyn_relocs;
4425 eind->dyn_relocs = NULL;
4426 }
4427
4428 edir->is_func |= eind->is_func;
4429 edir->is_func_descriptor |= eind->is_func_descriptor;
4430 edir->tls_mask |= eind->tls_mask;
4431 if (eind->oh != NULL)
4432 edir->oh = ppc_follow_link (eind->oh);
4433
4434 /* If called to transfer flags for a weakdef during processing
4435 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4436 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4437 if (!(ELIMINATE_COPY_RELOCS
4438 && eind->elf.root.type != bfd_link_hash_indirect
4439 && edir->elf.dynamic_adjusted))
4440 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4441
4442 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4443 edir->elf.ref_regular |= eind->elf.ref_regular;
4444 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4445 edir->elf.needs_plt |= eind->elf.needs_plt;
4446
4447 /* If we were called to copy over info for a weak sym, that's all. */
4448 if (eind->elf.root.type != bfd_link_hash_indirect)
4449 return;
4450
4451 /* Copy over got entries that we may have already seen to the
4452 symbol which just became indirect. */
4453 if (eind->elf.got.glist != NULL)
4454 {
4455 if (edir->elf.got.glist != NULL)
4456 {
4457 struct got_entry **entp;
4458 struct got_entry *ent;
4459
4460 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4461 {
4462 struct got_entry *dent;
4463
4464 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4465 if (dent->addend == ent->addend
4466 && dent->owner == ent->owner
4467 && dent->tls_type == ent->tls_type)
4468 {
4469 dent->got.refcount += ent->got.refcount;
4470 *entp = ent->next;
4471 break;
4472 }
4473 if (dent == NULL)
4474 entp = &ent->next;
4475 }
4476 *entp = edir->elf.got.glist;
4477 }
4478
4479 edir->elf.got.glist = eind->elf.got.glist;
4480 eind->elf.got.glist = NULL;
4481 }
4482
4483 /* And plt entries. */
4484 move_plt_plist (eind, edir);
4485
4486 if (eind->elf.dynindx != -1)
4487 {
4488 if (edir->elf.dynindx != -1)
4489 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4490 edir->elf.dynstr_index);
4491 edir->elf.dynindx = eind->elf.dynindx;
4492 edir->elf.dynstr_index = eind->elf.dynstr_index;
4493 eind->elf.dynindx = -1;
4494 eind->elf.dynstr_index = 0;
4495 }
4496 }
4497
4498 /* Find the function descriptor hash entry from the given function code
4499 hash entry FH. Link the entries via their OH fields. */
4500
4501 static struct ppc_link_hash_entry *
4502 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4503 {
4504 struct ppc_link_hash_entry *fdh = fh->oh;
4505
4506 if (fdh == NULL)
4507 {
4508 const char *fd_name = fh->elf.root.root.string + 1;
4509
4510 fdh = (struct ppc_link_hash_entry *)
4511 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4512 if (fdh == NULL)
4513 return fdh;
4514
4515 fdh->is_func_descriptor = 1;
4516 fdh->oh = fh;
4517 fh->is_func = 1;
4518 fh->oh = fdh;
4519 }
4520
4521 return ppc_follow_link (fdh);
4522 }
4523
4524 /* Make a fake function descriptor sym for the code sym FH. */
4525
4526 static struct ppc_link_hash_entry *
4527 make_fdh (struct bfd_link_info *info,
4528 struct ppc_link_hash_entry *fh)
4529 {
4530 bfd *abfd;
4531 asymbol *newsym;
4532 struct bfd_link_hash_entry *bh;
4533 struct ppc_link_hash_entry *fdh;
4534
4535 abfd = fh->elf.root.u.undef.abfd;
4536 newsym = bfd_make_empty_symbol (abfd);
4537 newsym->name = fh->elf.root.root.string + 1;
4538 newsym->section = bfd_und_section_ptr;
4539 newsym->value = 0;
4540 newsym->flags = BSF_WEAK;
4541
4542 bh = NULL;
4543 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4544 newsym->flags, newsym->section,
4545 newsym->value, NULL, FALSE, FALSE,
4546 &bh))
4547 return NULL;
4548
4549 fdh = (struct ppc_link_hash_entry *) bh;
4550 fdh->elf.non_elf = 0;
4551 fdh->fake = 1;
4552 fdh->is_func_descriptor = 1;
4553 fdh->oh = fh;
4554 fh->is_func = 1;
4555 fh->oh = fdh;
4556 return fdh;
4557 }
4558
4559 /* Fix function descriptor symbols defined in .opd sections to be
4560 function type. */
4561
4562 static bfd_boolean
4563 ppc64_elf_add_symbol_hook (bfd *ibfd,
4564 struct bfd_link_info *info,
4565 Elf_Internal_Sym *isym,
4566 const char **name ATTRIBUTE_UNUSED,
4567 flagword *flags ATTRIBUTE_UNUSED,
4568 asection **sec,
4569 bfd_vma *value ATTRIBUTE_UNUSED)
4570 {
4571 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4572 {
4573 if ((ibfd->flags & DYNAMIC) == 0)
4574 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4575 }
4576 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4577 ;
4578 else if (*sec != NULL
4579 && strcmp ((*sec)->name, ".opd") == 0)
4580 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4581
4582 return TRUE;
4583 }
4584
4585 /* This function makes an old ABI object reference to ".bar" cause the
4586 inclusion of a new ABI object archive that defines "bar".
4587 NAME is a symbol defined in an archive. Return a symbol in the hash
4588 table that might be satisfied by the archive symbols. */
4589
4590 static struct elf_link_hash_entry *
4591 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4592 struct bfd_link_info *info,
4593 const char *name)
4594 {
4595 struct elf_link_hash_entry *h;
4596 char *dot_name;
4597 size_t len;
4598
4599 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4600 if (h != NULL
4601 /* Don't return this sym if it is a fake function descriptor
4602 created by add_symbol_adjust. */
4603 && !(h->root.type == bfd_link_hash_undefweak
4604 && ((struct ppc_link_hash_entry *) h)->fake))
4605 return h;
4606
4607 if (name[0] == '.')
4608 return h;
4609
4610 len = strlen (name);
4611 dot_name = bfd_alloc (abfd, len + 2);
4612 if (dot_name == NULL)
4613 return (struct elf_link_hash_entry *) 0 - 1;
4614 dot_name[0] = '.';
4615 memcpy (dot_name + 1, name, len + 1);
4616 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4617 bfd_release (abfd, dot_name);
4618 return h;
4619 }
4620
4621 /* This function satisfies all old ABI object references to ".bar" if a
4622 new ABI object defines "bar". Well, at least, undefined dot symbols
4623 are made weak. This stops later archive searches from including an
4624 object if we already have a function descriptor definition. It also
4625 prevents the linker complaining about undefined symbols.
4626 We also check and correct mismatched symbol visibility here. The
4627 most restrictive visibility of the function descriptor and the
4628 function entry symbol is used. */
4629
4630 static bfd_boolean
4631 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4632 {
4633 struct ppc_link_hash_table *htab;
4634 struct ppc_link_hash_entry *fdh;
4635
4636 if (eh->elf.root.type == bfd_link_hash_indirect)
4637 return TRUE;
4638
4639 if (eh->elf.root.type == bfd_link_hash_warning)
4640 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4641
4642 if (eh->elf.root.root.string[0] != '.')
4643 abort ();
4644
4645 htab = ppc_hash_table (info);
4646 if (htab == NULL)
4647 return FALSE;
4648
4649 fdh = lookup_fdh (eh, htab);
4650 if (fdh == NULL)
4651 {
4652 if (!info->relocatable
4653 && (eh->elf.root.type == bfd_link_hash_undefined
4654 || eh->elf.root.type == bfd_link_hash_undefweak)
4655 && eh->elf.ref_regular)
4656 {
4657 /* Make an undefweak function descriptor sym, which is enough to
4658 pull in an --as-needed shared lib, but won't cause link
4659 errors. Archives are handled elsewhere. */
4660 fdh = make_fdh (info, eh);
4661 if (fdh == NULL)
4662 return FALSE;
4663 fdh->elf.ref_regular = 1;
4664 }
4665 }
4666 else
4667 {
4668 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4669 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4670 if (entry_vis < descr_vis)
4671 fdh->elf.other += entry_vis - descr_vis;
4672 else if (entry_vis > descr_vis)
4673 eh->elf.other += descr_vis - entry_vis;
4674
4675 if ((fdh->elf.root.type == bfd_link_hash_defined
4676 || fdh->elf.root.type == bfd_link_hash_defweak)
4677 && eh->elf.root.type == bfd_link_hash_undefined)
4678 {
4679 eh->elf.root.type = bfd_link_hash_undefweak;
4680 eh->was_undefined = 1;
4681 htab->twiddled_syms = 1;
4682 }
4683 }
4684
4685 return TRUE;
4686 }
4687
4688 /* Process list of dot-symbols we made in link_hash_newfunc. */
4689
4690 static bfd_boolean
4691 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4692 {
4693 struct ppc_link_hash_table *htab;
4694 struct ppc_link_hash_entry **p, *eh;
4695
4696 if (!is_ppc64_elf (info->output_bfd))
4697 return TRUE;
4698 htab = ppc_hash_table (info);
4699 if (htab == NULL)
4700 return FALSE;
4701
4702 if (is_ppc64_elf (ibfd))
4703 {
4704 p = &htab->dot_syms;
4705 while ((eh = *p) != NULL)
4706 {
4707 *p = NULL;
4708 if (!add_symbol_adjust (eh, info))
4709 return FALSE;
4710 p = &eh->u.next_dot_sym;
4711 }
4712 }
4713
4714 /* Clear the list for non-ppc64 input files. */
4715 p = &htab->dot_syms;
4716 while ((eh = *p) != NULL)
4717 {
4718 *p = NULL;
4719 p = &eh->u.next_dot_sym;
4720 }
4721
4722 /* We need to fix the undefs list for any syms we have twiddled to
4723 undef_weak. */
4724 if (htab->twiddled_syms)
4725 {
4726 bfd_link_repair_undef_list (&htab->elf.root);
4727 htab->twiddled_syms = 0;
4728 }
4729 return TRUE;
4730 }
4731
4732 /* Undo hash table changes when an --as-needed input file is determined
4733 not to be needed. */
4734
4735 static bfd_boolean
4736 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4737 struct bfd_link_info *info)
4738 {
4739 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4740
4741 if (htab == NULL)
4742 return FALSE;
4743
4744 htab->dot_syms = NULL;
4745 return TRUE;
4746 }
4747
4748 static struct plt_entry **
4749 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4750 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4751 {
4752 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4753 struct plt_entry **local_plt;
4754 unsigned char *local_got_tls_masks;
4755
4756 if (local_got_ents == NULL)
4757 {
4758 bfd_size_type size = symtab_hdr->sh_info;
4759
4760 size *= (sizeof (*local_got_ents)
4761 + sizeof (*local_plt)
4762 + sizeof (*local_got_tls_masks));
4763 local_got_ents = bfd_zalloc (abfd, size);
4764 if (local_got_ents == NULL)
4765 return NULL;
4766 elf_local_got_ents (abfd) = local_got_ents;
4767 }
4768
4769 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4770 {
4771 struct got_entry *ent;
4772
4773 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4774 if (ent->addend == r_addend
4775 && ent->owner == abfd
4776 && ent->tls_type == tls_type)
4777 break;
4778 if (ent == NULL)
4779 {
4780 bfd_size_type amt = sizeof (*ent);
4781 ent = bfd_alloc (abfd, amt);
4782 if (ent == NULL)
4783 return FALSE;
4784 ent->next = local_got_ents[r_symndx];
4785 ent->addend = r_addend;
4786 ent->owner = abfd;
4787 ent->tls_type = tls_type;
4788 ent->is_indirect = FALSE;
4789 ent->got.refcount = 0;
4790 local_got_ents[r_symndx] = ent;
4791 }
4792 ent->got.refcount += 1;
4793 }
4794
4795 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4796 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4797 local_got_tls_masks[r_symndx] |= tls_type;
4798
4799 return local_plt + r_symndx;
4800 }
4801
4802 static bfd_boolean
4803 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4804 {
4805 struct plt_entry *ent;
4806
4807 for (ent = *plist; ent != NULL; ent = ent->next)
4808 if (ent->addend == addend)
4809 break;
4810 if (ent == NULL)
4811 {
4812 bfd_size_type amt = sizeof (*ent);
4813 ent = bfd_alloc (abfd, amt);
4814 if (ent == NULL)
4815 return FALSE;
4816 ent->next = *plist;
4817 ent->addend = addend;
4818 ent->plt.refcount = 0;
4819 *plist = ent;
4820 }
4821 ent->plt.refcount += 1;
4822 return TRUE;
4823 }
4824
4825 static bfd_boolean
4826 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4827 {
4828 return (r_type == R_PPC64_REL24
4829 || r_type == R_PPC64_REL14
4830 || r_type == R_PPC64_REL14_BRTAKEN
4831 || r_type == R_PPC64_REL14_BRNTAKEN
4832 || r_type == R_PPC64_ADDR24
4833 || r_type == R_PPC64_ADDR14
4834 || r_type == R_PPC64_ADDR14_BRTAKEN
4835 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4836 }
4837
4838 /* Look through the relocs for a section during the first phase, and
4839 calculate needed space in the global offset table, procedure
4840 linkage table, and dynamic reloc sections. */
4841
4842 static bfd_boolean
4843 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4844 asection *sec, const Elf_Internal_Rela *relocs)
4845 {
4846 struct ppc_link_hash_table *htab;
4847 Elf_Internal_Shdr *symtab_hdr;
4848 struct elf_link_hash_entry **sym_hashes;
4849 const Elf_Internal_Rela *rel;
4850 const Elf_Internal_Rela *rel_end;
4851 asection *sreloc;
4852 asection **opd_sym_map;
4853 struct elf_link_hash_entry *tga, *dottga;
4854
4855 if (info->relocatable)
4856 return TRUE;
4857
4858 /* Don't do anything special with non-loaded, non-alloced sections.
4859 In particular, any relocs in such sections should not affect GOT
4860 and PLT reference counting (ie. we don't allow them to create GOT
4861 or PLT entries), there's no possibility or desire to optimize TLS
4862 relocs, and there's not much point in propagating relocs to shared
4863 libs that the dynamic linker won't relocate. */
4864 if ((sec->flags & SEC_ALLOC) == 0)
4865 return TRUE;
4866
4867 BFD_ASSERT (is_ppc64_elf (abfd));
4868
4869 htab = ppc_hash_table (info);
4870 if (htab == NULL)
4871 return FALSE;
4872
4873 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4874 FALSE, FALSE, TRUE);
4875 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4876 FALSE, FALSE, TRUE);
4877 symtab_hdr = &elf_symtab_hdr (abfd);
4878 sym_hashes = elf_sym_hashes (abfd);
4879 sreloc = NULL;
4880 opd_sym_map = NULL;
4881 if (strcmp (sec->name, ".opd") == 0)
4882 {
4883 /* Garbage collection needs some extra help with .opd sections.
4884 We don't want to necessarily keep everything referenced by
4885 relocs in .opd, as that would keep all functions. Instead,
4886 if we reference an .opd symbol (a function descriptor), we
4887 want to keep the function code symbol's section. This is
4888 easy for global symbols, but for local syms we need to keep
4889 information about the associated function section. */
4890 bfd_size_type amt;
4891
4892 amt = sec->size * sizeof (*opd_sym_map) / 8;
4893 opd_sym_map = bfd_zalloc (abfd, amt);
4894 if (opd_sym_map == NULL)
4895 return FALSE;
4896 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4897 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4898 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4899 }
4900
4901 if (htab->sfpr == NULL
4902 && !create_linkage_sections (htab->elf.dynobj, info))
4903 return FALSE;
4904
4905 rel_end = relocs + sec->reloc_count;
4906 for (rel = relocs; rel < rel_end; rel++)
4907 {
4908 unsigned long r_symndx;
4909 struct elf_link_hash_entry *h;
4910 enum elf_ppc64_reloc_type r_type;
4911 int tls_type;
4912 struct _ppc64_elf_section_data *ppc64_sec;
4913 struct plt_entry **ifunc;
4914
4915 r_symndx = ELF64_R_SYM (rel->r_info);
4916 if (r_symndx < symtab_hdr->sh_info)
4917 h = NULL;
4918 else
4919 {
4920 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4921 h = elf_follow_link (h);
4922 }
4923
4924 tls_type = 0;
4925 ifunc = NULL;
4926 if (h != NULL)
4927 {
4928 if (h->type == STT_GNU_IFUNC)
4929 {
4930 h->needs_plt = 1;
4931 ifunc = &h->plt.plist;
4932 }
4933 }
4934 else
4935 {
4936 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4937 abfd, r_symndx);
4938 if (isym == NULL)
4939 return FALSE;
4940
4941 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4942 {
4943 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4944 rel->r_addend, PLT_IFUNC);
4945 if (ifunc == NULL)
4946 return FALSE;
4947 }
4948 }
4949 r_type = ELF64_R_TYPE (rel->r_info);
4950 if (is_branch_reloc (r_type))
4951 {
4952 if (h != NULL && (h == tga || h == dottga))
4953 {
4954 if (rel != relocs
4955 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4956 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4957 /* We have a new-style __tls_get_addr call with a marker
4958 reloc. */
4959 ;
4960 else
4961 /* Mark this section as having an old-style call. */
4962 sec->has_tls_get_addr_call = 1;
4963 }
4964
4965 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4966 if (ifunc != NULL
4967 && !update_plt_info (abfd, ifunc, rel->r_addend))
4968 return FALSE;
4969 }
4970
4971 switch (r_type)
4972 {
4973 case R_PPC64_TLSGD:
4974 case R_PPC64_TLSLD:
4975 /* These special tls relocs tie a call to __tls_get_addr with
4976 its parameter symbol. */
4977 break;
4978
4979 case R_PPC64_GOT_TLSLD16:
4980 case R_PPC64_GOT_TLSLD16_LO:
4981 case R_PPC64_GOT_TLSLD16_HI:
4982 case R_PPC64_GOT_TLSLD16_HA:
4983 tls_type = TLS_TLS | TLS_LD;
4984 goto dogottls;
4985
4986 case R_PPC64_GOT_TLSGD16:
4987 case R_PPC64_GOT_TLSGD16_LO:
4988 case R_PPC64_GOT_TLSGD16_HI:
4989 case R_PPC64_GOT_TLSGD16_HA:
4990 tls_type = TLS_TLS | TLS_GD;
4991 goto dogottls;
4992
4993 case R_PPC64_GOT_TPREL16_DS:
4994 case R_PPC64_GOT_TPREL16_LO_DS:
4995 case R_PPC64_GOT_TPREL16_HI:
4996 case R_PPC64_GOT_TPREL16_HA:
4997 if (!info->executable)
4998 info->flags |= DF_STATIC_TLS;
4999 tls_type = TLS_TLS | TLS_TPREL;
5000 goto dogottls;
5001
5002 case R_PPC64_GOT_DTPREL16_DS:
5003 case R_PPC64_GOT_DTPREL16_LO_DS:
5004 case R_PPC64_GOT_DTPREL16_HI:
5005 case R_PPC64_GOT_DTPREL16_HA:
5006 tls_type = TLS_TLS | TLS_DTPREL;
5007 dogottls:
5008 sec->has_tls_reloc = 1;
5009 /* Fall thru */
5010
5011 case R_PPC64_GOT16:
5012 case R_PPC64_GOT16_DS:
5013 case R_PPC64_GOT16_HA:
5014 case R_PPC64_GOT16_HI:
5015 case R_PPC64_GOT16_LO:
5016 case R_PPC64_GOT16_LO_DS:
5017 /* This symbol requires a global offset table entry. */
5018 sec->has_toc_reloc = 1;
5019 if (r_type == R_PPC64_GOT_TLSLD16
5020 || r_type == R_PPC64_GOT_TLSGD16
5021 || r_type == R_PPC64_GOT_TPREL16_DS
5022 || r_type == R_PPC64_GOT_DTPREL16_DS
5023 || r_type == R_PPC64_GOT16
5024 || r_type == R_PPC64_GOT16_DS)
5025 {
5026 htab->do_multi_toc = 1;
5027 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5028 }
5029
5030 if (ppc64_elf_tdata (abfd)->got == NULL
5031 && !create_got_section (abfd, info))
5032 return FALSE;
5033
5034 if (h != NULL)
5035 {
5036 struct ppc_link_hash_entry *eh;
5037 struct got_entry *ent;
5038
5039 eh = (struct ppc_link_hash_entry *) h;
5040 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5041 if (ent->addend == rel->r_addend
5042 && ent->owner == abfd
5043 && ent->tls_type == tls_type)
5044 break;
5045 if (ent == NULL)
5046 {
5047 bfd_size_type amt = sizeof (*ent);
5048 ent = bfd_alloc (abfd, amt);
5049 if (ent == NULL)
5050 return FALSE;
5051 ent->next = eh->elf.got.glist;
5052 ent->addend = rel->r_addend;
5053 ent->owner = abfd;
5054 ent->tls_type = tls_type;
5055 ent->is_indirect = FALSE;
5056 ent->got.refcount = 0;
5057 eh->elf.got.glist = ent;
5058 }
5059 ent->got.refcount += 1;
5060 eh->tls_mask |= tls_type;
5061 }
5062 else
5063 /* This is a global offset table entry for a local symbol. */
5064 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5065 rel->r_addend, tls_type))
5066 return FALSE;
5067 break;
5068
5069 case R_PPC64_PLT16_HA:
5070 case R_PPC64_PLT16_HI:
5071 case R_PPC64_PLT16_LO:
5072 case R_PPC64_PLT32:
5073 case R_PPC64_PLT64:
5074 /* This symbol requires a procedure linkage table entry. We
5075 actually build the entry in adjust_dynamic_symbol,
5076 because this might be a case of linking PIC code without
5077 linking in any dynamic objects, in which case we don't
5078 need to generate a procedure linkage table after all. */
5079 if (h == NULL)
5080 {
5081 /* It does not make sense to have a procedure linkage
5082 table entry for a local symbol. */
5083 bfd_set_error (bfd_error_bad_value);
5084 return FALSE;
5085 }
5086 else
5087 {
5088 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5089 return FALSE;
5090 h->needs_plt = 1;
5091 if (h->root.root.string[0] == '.'
5092 && h->root.root.string[1] != '\0')
5093 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5094 }
5095 break;
5096
5097 /* The following relocations don't need to propagate the
5098 relocation if linking a shared object since they are
5099 section relative. */
5100 case R_PPC64_SECTOFF:
5101 case R_PPC64_SECTOFF_LO:
5102 case R_PPC64_SECTOFF_HI:
5103 case R_PPC64_SECTOFF_HA:
5104 case R_PPC64_SECTOFF_DS:
5105 case R_PPC64_SECTOFF_LO_DS:
5106 case R_PPC64_DTPREL16:
5107 case R_PPC64_DTPREL16_LO:
5108 case R_PPC64_DTPREL16_HI:
5109 case R_PPC64_DTPREL16_HA:
5110 case R_PPC64_DTPREL16_DS:
5111 case R_PPC64_DTPREL16_LO_DS:
5112 case R_PPC64_DTPREL16_HIGHER:
5113 case R_PPC64_DTPREL16_HIGHERA:
5114 case R_PPC64_DTPREL16_HIGHEST:
5115 case R_PPC64_DTPREL16_HIGHESTA:
5116 break;
5117
5118 /* Nor do these. */
5119 case R_PPC64_REL16:
5120 case R_PPC64_REL16_LO:
5121 case R_PPC64_REL16_HI:
5122 case R_PPC64_REL16_HA:
5123 break;
5124
5125 case R_PPC64_TOC16:
5126 case R_PPC64_TOC16_DS:
5127 htab->do_multi_toc = 1;
5128 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5129 case R_PPC64_TOC16_LO:
5130 case R_PPC64_TOC16_HI:
5131 case R_PPC64_TOC16_HA:
5132 case R_PPC64_TOC16_LO_DS:
5133 sec->has_toc_reloc = 1;
5134 break;
5135
5136 /* This relocation describes the C++ object vtable hierarchy.
5137 Reconstruct it for later use during GC. */
5138 case R_PPC64_GNU_VTINHERIT:
5139 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5140 return FALSE;
5141 break;
5142
5143 /* This relocation describes which C++ vtable entries are actually
5144 used. Record for later use during GC. */
5145 case R_PPC64_GNU_VTENTRY:
5146 BFD_ASSERT (h != NULL);
5147 if (h != NULL
5148 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5149 return FALSE;
5150 break;
5151
5152 case R_PPC64_REL14:
5153 case R_PPC64_REL14_BRTAKEN:
5154 case R_PPC64_REL14_BRNTAKEN:
5155 {
5156 asection *dest = NULL;
5157
5158 /* Heuristic: If jumping outside our section, chances are
5159 we are going to need a stub. */
5160 if (h != NULL)
5161 {
5162 /* If the sym is weak it may be overridden later, so
5163 don't assume we know where a weak sym lives. */
5164 if (h->root.type == bfd_link_hash_defined)
5165 dest = h->root.u.def.section;
5166 }
5167 else
5168 {
5169 Elf_Internal_Sym *isym;
5170
5171 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5172 abfd, r_symndx);
5173 if (isym == NULL)
5174 return FALSE;
5175
5176 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5177 }
5178
5179 if (dest != sec)
5180 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5181 }
5182 /* Fall through. */
5183
5184 case R_PPC64_REL24:
5185 if (h != NULL && ifunc == NULL)
5186 {
5187 /* We may need a .plt entry if the function this reloc
5188 refers to is in a shared lib. */
5189 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5190 return FALSE;
5191 h->needs_plt = 1;
5192 if (h->root.root.string[0] == '.'
5193 && h->root.root.string[1] != '\0')
5194 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5195 if (h == tga || h == dottga)
5196 sec->has_tls_reloc = 1;
5197 }
5198 break;
5199
5200 case R_PPC64_TPREL64:
5201 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5202 if (!info->executable)
5203 info->flags |= DF_STATIC_TLS;
5204 goto dotlstoc;
5205
5206 case R_PPC64_DTPMOD64:
5207 if (rel + 1 < rel_end
5208 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5209 && rel[1].r_offset == rel->r_offset + 8)
5210 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5211 else
5212 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5213 goto dotlstoc;
5214
5215 case R_PPC64_DTPREL64:
5216 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5217 if (rel != relocs
5218 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5219 && rel[-1].r_offset == rel->r_offset - 8)
5220 /* This is the second reloc of a dtpmod, dtprel pair.
5221 Don't mark with TLS_DTPREL. */
5222 goto dodyn;
5223
5224 dotlstoc:
5225 sec->has_tls_reloc = 1;
5226 if (h != NULL)
5227 {
5228 struct ppc_link_hash_entry *eh;
5229 eh = (struct ppc_link_hash_entry *) h;
5230 eh->tls_mask |= tls_type;
5231 }
5232 else
5233 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5234 rel->r_addend, tls_type))
5235 return FALSE;
5236
5237 ppc64_sec = ppc64_elf_section_data (sec);
5238 if (ppc64_sec->sec_type != sec_toc)
5239 {
5240 bfd_size_type amt;
5241
5242 /* One extra to simplify get_tls_mask. */
5243 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5244 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5245 if (ppc64_sec->u.toc.symndx == NULL)
5246 return FALSE;
5247 amt = sec->size * sizeof (bfd_vma) / 8;
5248 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5249 if (ppc64_sec->u.toc.add == NULL)
5250 return FALSE;
5251 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5252 ppc64_sec->sec_type = sec_toc;
5253 }
5254 BFD_ASSERT (rel->r_offset % 8 == 0);
5255 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5256 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5257
5258 /* Mark the second slot of a GD or LD entry.
5259 -1 to indicate GD and -2 to indicate LD. */
5260 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5261 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5262 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5263 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5264 goto dodyn;
5265
5266 case R_PPC64_TPREL16:
5267 case R_PPC64_TPREL16_LO:
5268 case R_PPC64_TPREL16_HI:
5269 case R_PPC64_TPREL16_HA:
5270 case R_PPC64_TPREL16_DS:
5271 case R_PPC64_TPREL16_LO_DS:
5272 case R_PPC64_TPREL16_HIGHER:
5273 case R_PPC64_TPREL16_HIGHERA:
5274 case R_PPC64_TPREL16_HIGHEST:
5275 case R_PPC64_TPREL16_HIGHESTA:
5276 if (info->shared)
5277 {
5278 if (!info->executable)
5279 info->flags |= DF_STATIC_TLS;
5280 goto dodyn;
5281 }
5282 break;
5283
5284 case R_PPC64_ADDR64:
5285 if (opd_sym_map != NULL
5286 && rel + 1 < rel_end
5287 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5288 {
5289 if (h != NULL)
5290 {
5291 if (h->root.root.string[0] == '.'
5292 && h->root.root.string[1] != 0
5293 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5294 ;
5295 else
5296 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5297 }
5298 else
5299 {
5300 asection *s;
5301 Elf_Internal_Sym *isym;
5302
5303 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5304 abfd, r_symndx);
5305 if (isym == NULL)
5306 return FALSE;
5307
5308 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5309 if (s != NULL && s != sec)
5310 opd_sym_map[rel->r_offset / 8] = s;
5311 }
5312 }
5313 /* Fall through. */
5314
5315 case R_PPC64_REL30:
5316 case R_PPC64_REL32:
5317 case R_PPC64_REL64:
5318 case R_PPC64_ADDR14:
5319 case R_PPC64_ADDR14_BRNTAKEN:
5320 case R_PPC64_ADDR14_BRTAKEN:
5321 case R_PPC64_ADDR16:
5322 case R_PPC64_ADDR16_DS:
5323 case R_PPC64_ADDR16_HA:
5324 case R_PPC64_ADDR16_HI:
5325 case R_PPC64_ADDR16_HIGHER:
5326 case R_PPC64_ADDR16_HIGHERA:
5327 case R_PPC64_ADDR16_HIGHEST:
5328 case R_PPC64_ADDR16_HIGHESTA:
5329 case R_PPC64_ADDR16_LO:
5330 case R_PPC64_ADDR16_LO_DS:
5331 case R_PPC64_ADDR24:
5332 case R_PPC64_ADDR32:
5333 case R_PPC64_UADDR16:
5334 case R_PPC64_UADDR32:
5335 case R_PPC64_UADDR64:
5336 case R_PPC64_TOC:
5337 if (h != NULL && !info->shared)
5338 /* We may need a copy reloc. */
5339 h->non_got_ref = 1;
5340
5341 /* Don't propagate .opd relocs. */
5342 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5343 break;
5344
5345 /* If we are creating a shared library, and this is a reloc
5346 against a global symbol, or a non PC relative reloc
5347 against a local symbol, then we need to copy the reloc
5348 into the shared library. However, if we are linking with
5349 -Bsymbolic, we do not need to copy a reloc against a
5350 global symbol which is defined in an object we are
5351 including in the link (i.e., DEF_REGULAR is set). At
5352 this point we have not seen all the input files, so it is
5353 possible that DEF_REGULAR is not set now but will be set
5354 later (it is never cleared). In case of a weak definition,
5355 DEF_REGULAR may be cleared later by a strong definition in
5356 a shared library. We account for that possibility below by
5357 storing information in the dyn_relocs field of the hash
5358 table entry. A similar situation occurs when creating
5359 shared libraries and symbol visibility changes render the
5360 symbol local.
5361
5362 If on the other hand, we are creating an executable, we
5363 may need to keep relocations for symbols satisfied by a
5364 dynamic library if we manage to avoid copy relocs for the
5365 symbol. */
5366 dodyn:
5367 if ((info->shared
5368 && (must_be_dyn_reloc (info, r_type)
5369 || (h != NULL
5370 && (! info->symbolic
5371 || h->root.type == bfd_link_hash_defweak
5372 || !h->def_regular))))
5373 || (ELIMINATE_COPY_RELOCS
5374 && !info->shared
5375 && h != NULL
5376 && (h->root.type == bfd_link_hash_defweak
5377 || !h->def_regular))
5378 || (!info->shared
5379 && ifunc != NULL))
5380 {
5381 struct ppc_dyn_relocs *p;
5382 struct ppc_dyn_relocs **head;
5383
5384 /* We must copy these reloc types into the output file.
5385 Create a reloc section in dynobj and make room for
5386 this reloc. */
5387 if (sreloc == NULL)
5388 {
5389 sreloc = _bfd_elf_make_dynamic_reloc_section
5390 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5391
5392 if (sreloc == NULL)
5393 return FALSE;
5394 }
5395
5396 /* If this is a global symbol, we count the number of
5397 relocations we need for this symbol. */
5398 if (h != NULL)
5399 {
5400 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5401 }
5402 else
5403 {
5404 /* Track dynamic relocs needed for local syms too.
5405 We really need local syms available to do this
5406 easily. Oh well. */
5407 asection *s;
5408 void *vpp;
5409 Elf_Internal_Sym *isym;
5410
5411 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5412 abfd, r_symndx);
5413 if (isym == NULL)
5414 return FALSE;
5415
5416 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5417 if (s == NULL)
5418 s = sec;
5419
5420 vpp = &elf_section_data (s)->local_dynrel;
5421 head = (struct ppc_dyn_relocs **) vpp;
5422 }
5423
5424 p = *head;
5425 if (p == NULL || p->sec != sec)
5426 {
5427 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5428 if (p == NULL)
5429 return FALSE;
5430 p->next = *head;
5431 *head = p;
5432 p->sec = sec;
5433 p->count = 0;
5434 p->pc_count = 0;
5435 }
5436
5437 p->count += 1;
5438 if (!must_be_dyn_reloc (info, r_type))
5439 p->pc_count += 1;
5440 }
5441 break;
5442
5443 default:
5444 break;
5445 }
5446 }
5447
5448 return TRUE;
5449 }
5450
5451 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5452 of the code entry point, and its section. */
5453
5454 static bfd_vma
5455 opd_entry_value (asection *opd_sec,
5456 bfd_vma offset,
5457 asection **code_sec,
5458 bfd_vma *code_off)
5459 {
5460 bfd *opd_bfd = opd_sec->owner;
5461 Elf_Internal_Rela *relocs;
5462 Elf_Internal_Rela *lo, *hi, *look;
5463 bfd_vma val;
5464
5465 /* No relocs implies we are linking a --just-symbols object. */
5466 if (opd_sec->reloc_count == 0)
5467 {
5468 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5469 return (bfd_vma) -1;
5470
5471 if (code_sec != NULL)
5472 {
5473 asection *sec, *likely = NULL;
5474 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5475 if (sec->vma <= val
5476 && (sec->flags & SEC_LOAD) != 0
5477 && (sec->flags & SEC_ALLOC) != 0)
5478 likely = sec;
5479 if (likely != NULL)
5480 {
5481 *code_sec = likely;
5482 if (code_off != NULL)
5483 *code_off = val - likely->vma;
5484 }
5485 }
5486 return val;
5487 }
5488
5489 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5490
5491 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5492 if (relocs == NULL)
5493 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5494
5495 /* Go find the opd reloc at the sym address. */
5496 lo = relocs;
5497 BFD_ASSERT (lo != NULL);
5498 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5499 val = (bfd_vma) -1;
5500 while (lo < hi)
5501 {
5502 look = lo + (hi - lo) / 2;
5503 if (look->r_offset < offset)
5504 lo = look + 1;
5505 else if (look->r_offset > offset)
5506 hi = look;
5507 else
5508 {
5509 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5510
5511 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5512 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5513 {
5514 unsigned long symndx = ELF64_R_SYM (look->r_info);
5515 asection *sec;
5516
5517 if (symndx < symtab_hdr->sh_info)
5518 {
5519 Elf_Internal_Sym *sym;
5520
5521 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5522 if (sym == NULL)
5523 {
5524 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5525 symtab_hdr->sh_info,
5526 0, NULL, NULL, NULL);
5527 if (sym == NULL)
5528 break;
5529 symtab_hdr->contents = (bfd_byte *) sym;
5530 }
5531
5532 sym += symndx;
5533 val = sym->st_value;
5534 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5535 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5536 }
5537 else
5538 {
5539 struct elf_link_hash_entry **sym_hashes;
5540 struct elf_link_hash_entry *rh;
5541
5542 sym_hashes = elf_sym_hashes (opd_bfd);
5543 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5544 rh = elf_follow_link (rh);
5545 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5546 || rh->root.type == bfd_link_hash_defweak);
5547 val = rh->root.u.def.value;
5548 sec = rh->root.u.def.section;
5549 }
5550 val += look->r_addend;
5551 if (code_off != NULL)
5552 *code_off = val;
5553 if (code_sec != NULL)
5554 *code_sec = sec;
5555 if (sec != NULL && sec->output_section != NULL)
5556 val += sec->output_section->vma + sec->output_offset;
5557 }
5558 break;
5559 }
5560 }
5561
5562 return val;
5563 }
5564
5565 /* Return true if symbol is defined in a regular object file. */
5566
5567 static bfd_boolean
5568 is_static_defined (struct elf_link_hash_entry *h)
5569 {
5570 return ((h->root.type == bfd_link_hash_defined
5571 || h->root.type == bfd_link_hash_defweak)
5572 && h->root.u.def.section != NULL
5573 && h->root.u.def.section->output_section != NULL);
5574 }
5575
5576 /* If FDH is a function descriptor symbol, return the associated code
5577 entry symbol if it is defined. Return NULL otherwise. */
5578
5579 static struct ppc_link_hash_entry *
5580 defined_code_entry (struct ppc_link_hash_entry *fdh)
5581 {
5582 if (fdh->is_func_descriptor)
5583 {
5584 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5585 if (fh->elf.root.type == bfd_link_hash_defined
5586 || fh->elf.root.type == bfd_link_hash_defweak)
5587 return fh;
5588 }
5589 return NULL;
5590 }
5591
5592 /* If FH is a function code entry symbol, return the associated
5593 function descriptor symbol if it is defined. Return NULL otherwise. */
5594
5595 static struct ppc_link_hash_entry *
5596 defined_func_desc (struct ppc_link_hash_entry *fh)
5597 {
5598 if (fh->oh != NULL
5599 && fh->oh->is_func_descriptor)
5600 {
5601 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5602 if (fdh->elf.root.type == bfd_link_hash_defined
5603 || fdh->elf.root.type == bfd_link_hash_defweak)
5604 return fdh;
5605 }
5606 return NULL;
5607 }
5608
5609 /* Mark all our entry sym sections, both opd and code section. */
5610
5611 static void
5612 ppc64_elf_gc_keep (struct bfd_link_info *info)
5613 {
5614 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5615 struct bfd_sym_chain *sym;
5616
5617 if (htab == NULL)
5618 return;
5619
5620 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5621 {
5622 struct ppc_link_hash_entry *eh, *fh;
5623 asection *sec;
5624
5625 eh = (struct ppc_link_hash_entry *)
5626 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5627 if (eh == NULL)
5628 continue;
5629 if (eh->elf.root.type != bfd_link_hash_defined
5630 && eh->elf.root.type != bfd_link_hash_defweak)
5631 continue;
5632
5633 fh = defined_code_entry (eh);
5634 if (fh != NULL)
5635 {
5636 sec = fh->elf.root.u.def.section;
5637 sec->flags |= SEC_KEEP;
5638 }
5639 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5640 && opd_entry_value (eh->elf.root.u.def.section,
5641 eh->elf.root.u.def.value,
5642 &sec, NULL) != (bfd_vma) -1)
5643 sec->flags |= SEC_KEEP;
5644
5645 sec = eh->elf.root.u.def.section;
5646 sec->flags |= SEC_KEEP;
5647 }
5648 }
5649
5650 /* Mark sections containing dynamically referenced symbols. When
5651 building shared libraries, we must assume that any visible symbol is
5652 referenced. */
5653
5654 static bfd_boolean
5655 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5656 {
5657 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5658 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5659 struct ppc_link_hash_entry *fdh;
5660
5661 if (eh->elf.root.type == bfd_link_hash_warning)
5662 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5663
5664 /* Dynamic linking info is on the func descriptor sym. */
5665 fdh = defined_func_desc (eh);
5666 if (fdh != NULL)
5667 eh = fdh;
5668
5669 if ((eh->elf.root.type == bfd_link_hash_defined
5670 || eh->elf.root.type == bfd_link_hash_defweak)
5671 && (eh->elf.ref_dynamic
5672 || (!info->executable
5673 && eh->elf.def_regular
5674 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5675 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5676 {
5677 asection *code_sec;
5678 struct ppc_link_hash_entry *fh;
5679
5680 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5681
5682 /* Function descriptor syms cause the associated
5683 function code sym section to be marked. */
5684 fh = defined_code_entry (eh);
5685 if (fh != NULL)
5686 {
5687 code_sec = fh->elf.root.u.def.section;
5688 code_sec->flags |= SEC_KEEP;
5689 }
5690 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5691 && opd_entry_value (eh->elf.root.u.def.section,
5692 eh->elf.root.u.def.value,
5693 &code_sec, NULL) != (bfd_vma) -1)
5694 code_sec->flags |= SEC_KEEP;
5695 }
5696
5697 return TRUE;
5698 }
5699
5700 /* Return the section that should be marked against GC for a given
5701 relocation. */
5702
5703 static asection *
5704 ppc64_elf_gc_mark_hook (asection *sec,
5705 struct bfd_link_info *info,
5706 Elf_Internal_Rela *rel,
5707 struct elf_link_hash_entry *h,
5708 Elf_Internal_Sym *sym)
5709 {
5710 asection *rsec;
5711
5712 /* Syms return NULL if we're marking .opd, so we avoid marking all
5713 function sections, as all functions are referenced in .opd. */
5714 rsec = NULL;
5715 if (get_opd_info (sec) != NULL)
5716 return rsec;
5717
5718 if (h != NULL)
5719 {
5720 enum elf_ppc64_reloc_type r_type;
5721 struct ppc_link_hash_entry *eh, *fh, *fdh;
5722
5723 r_type = ELF64_R_TYPE (rel->r_info);
5724 switch (r_type)
5725 {
5726 case R_PPC64_GNU_VTINHERIT:
5727 case R_PPC64_GNU_VTENTRY:
5728 break;
5729
5730 default:
5731 switch (h->root.type)
5732 {
5733 case bfd_link_hash_defined:
5734 case bfd_link_hash_defweak:
5735 eh = (struct ppc_link_hash_entry *) h;
5736 fdh = defined_func_desc (eh);
5737 if (fdh != NULL)
5738 eh = fdh;
5739
5740 /* Function descriptor syms cause the associated
5741 function code sym section to be marked. */
5742 fh = defined_code_entry (eh);
5743 if (fh != NULL)
5744 {
5745 /* They also mark their opd section. */
5746 eh->elf.root.u.def.section->gc_mark = 1;
5747
5748 rsec = fh->elf.root.u.def.section;
5749 }
5750 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5751 && opd_entry_value (eh->elf.root.u.def.section,
5752 eh->elf.root.u.def.value,
5753 &rsec, NULL) != (bfd_vma) -1)
5754 eh->elf.root.u.def.section->gc_mark = 1;
5755 else
5756 rsec = h->root.u.def.section;
5757 break;
5758
5759 case bfd_link_hash_common:
5760 rsec = h->root.u.c.p->section;
5761 break;
5762
5763 default:
5764 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5765 }
5766 }
5767 }
5768 else
5769 {
5770 struct _opd_sec_data *opd;
5771
5772 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5773 opd = get_opd_info (rsec);
5774 if (opd != NULL && opd->func_sec != NULL)
5775 {
5776 rsec->gc_mark = 1;
5777
5778 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5779 }
5780 }
5781
5782 return rsec;
5783 }
5784
5785 /* Update the .got, .plt. and dynamic reloc reference counts for the
5786 section being removed. */
5787
5788 static bfd_boolean
5789 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5790 asection *sec, const Elf_Internal_Rela *relocs)
5791 {
5792 struct ppc_link_hash_table *htab;
5793 Elf_Internal_Shdr *symtab_hdr;
5794 struct elf_link_hash_entry **sym_hashes;
5795 struct got_entry **local_got_ents;
5796 const Elf_Internal_Rela *rel, *relend;
5797
5798 if (info->relocatable)
5799 return TRUE;
5800
5801 if ((sec->flags & SEC_ALLOC) == 0)
5802 return TRUE;
5803
5804 elf_section_data (sec)->local_dynrel = NULL;
5805
5806 htab = ppc_hash_table (info);
5807 if (htab == NULL)
5808 return FALSE;
5809
5810 symtab_hdr = &elf_symtab_hdr (abfd);
5811 sym_hashes = elf_sym_hashes (abfd);
5812 local_got_ents = elf_local_got_ents (abfd);
5813
5814 relend = relocs + sec->reloc_count;
5815 for (rel = relocs; rel < relend; rel++)
5816 {
5817 unsigned long r_symndx;
5818 enum elf_ppc64_reloc_type r_type;
5819 struct elf_link_hash_entry *h = NULL;
5820 unsigned char tls_type = 0;
5821
5822 r_symndx = ELF64_R_SYM (rel->r_info);
5823 r_type = ELF64_R_TYPE (rel->r_info);
5824 if (r_symndx >= symtab_hdr->sh_info)
5825 {
5826 struct ppc_link_hash_entry *eh;
5827 struct ppc_dyn_relocs **pp;
5828 struct ppc_dyn_relocs *p;
5829
5830 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5831 h = elf_follow_link (h);
5832 eh = (struct ppc_link_hash_entry *) h;
5833
5834 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5835 if (p->sec == sec)
5836 {
5837 /* Everything must go for SEC. */
5838 *pp = p->next;
5839 break;
5840 }
5841 }
5842
5843 if (is_branch_reloc (r_type))
5844 {
5845 struct plt_entry **ifunc = NULL;
5846 if (h != NULL)
5847 {
5848 if (h->type == STT_GNU_IFUNC)
5849 ifunc = &h->plt.plist;
5850 }
5851 else if (local_got_ents != NULL)
5852 {
5853 struct plt_entry **local_plt = (struct plt_entry **)
5854 (local_got_ents + symtab_hdr->sh_info);
5855 unsigned char *local_got_tls_masks = (unsigned char *)
5856 (local_plt + symtab_hdr->sh_info);
5857 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5858 ifunc = local_plt + r_symndx;
5859 }
5860 if (ifunc != NULL)
5861 {
5862 struct plt_entry *ent;
5863
5864 for (ent = *ifunc; ent != NULL; ent = ent->next)
5865 if (ent->addend == rel->r_addend)
5866 break;
5867 if (ent == NULL)
5868 abort ();
5869 if (ent->plt.refcount > 0)
5870 ent->plt.refcount -= 1;
5871 continue;
5872 }
5873 }
5874
5875 switch (r_type)
5876 {
5877 case R_PPC64_GOT_TLSLD16:
5878 case R_PPC64_GOT_TLSLD16_LO:
5879 case R_PPC64_GOT_TLSLD16_HI:
5880 case R_PPC64_GOT_TLSLD16_HA:
5881 tls_type = TLS_TLS | TLS_LD;
5882 goto dogot;
5883
5884 case R_PPC64_GOT_TLSGD16:
5885 case R_PPC64_GOT_TLSGD16_LO:
5886 case R_PPC64_GOT_TLSGD16_HI:
5887 case R_PPC64_GOT_TLSGD16_HA:
5888 tls_type = TLS_TLS | TLS_GD;
5889 goto dogot;
5890
5891 case R_PPC64_GOT_TPREL16_DS:
5892 case R_PPC64_GOT_TPREL16_LO_DS:
5893 case R_PPC64_GOT_TPREL16_HI:
5894 case R_PPC64_GOT_TPREL16_HA:
5895 tls_type = TLS_TLS | TLS_TPREL;
5896 goto dogot;
5897
5898 case R_PPC64_GOT_DTPREL16_DS:
5899 case R_PPC64_GOT_DTPREL16_LO_DS:
5900 case R_PPC64_GOT_DTPREL16_HI:
5901 case R_PPC64_GOT_DTPREL16_HA:
5902 tls_type = TLS_TLS | TLS_DTPREL;
5903 goto dogot;
5904
5905 case R_PPC64_GOT16:
5906 case R_PPC64_GOT16_DS:
5907 case R_PPC64_GOT16_HA:
5908 case R_PPC64_GOT16_HI:
5909 case R_PPC64_GOT16_LO:
5910 case R_PPC64_GOT16_LO_DS:
5911 dogot:
5912 {
5913 struct got_entry *ent;
5914
5915 if (h != NULL)
5916 ent = h->got.glist;
5917 else
5918 ent = local_got_ents[r_symndx];
5919
5920 for (; ent != NULL; ent = ent->next)
5921 if (ent->addend == rel->r_addend
5922 && ent->owner == abfd
5923 && ent->tls_type == tls_type)
5924 break;
5925 if (ent == NULL)
5926 abort ();
5927 if (ent->got.refcount > 0)
5928 ent->got.refcount -= 1;
5929 }
5930 break;
5931
5932 case R_PPC64_PLT16_HA:
5933 case R_PPC64_PLT16_HI:
5934 case R_PPC64_PLT16_LO:
5935 case R_PPC64_PLT32:
5936 case R_PPC64_PLT64:
5937 case R_PPC64_REL14:
5938 case R_PPC64_REL14_BRNTAKEN:
5939 case R_PPC64_REL14_BRTAKEN:
5940 case R_PPC64_REL24:
5941 if (h != NULL)
5942 {
5943 struct plt_entry *ent;
5944
5945 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5946 if (ent->addend == rel->r_addend)
5947 break;
5948 if (ent != NULL && ent->plt.refcount > 0)
5949 ent->plt.refcount -= 1;
5950 }
5951 break;
5952
5953 default:
5954 break;
5955 }
5956 }
5957 return TRUE;
5958 }
5959
5960 /* The maximum size of .sfpr. */
5961 #define SFPR_MAX (218*4)
5962
5963 struct sfpr_def_parms
5964 {
5965 const char name[12];
5966 unsigned char lo, hi;
5967 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5968 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5969 };
5970
5971 /* Auto-generate _save*, _rest* functions in .sfpr. */
5972
5973 static bfd_boolean
5974 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5975 {
5976 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5977 unsigned int i;
5978 size_t len = strlen (parm->name);
5979 bfd_boolean writing = FALSE;
5980 char sym[16];
5981
5982 if (htab == NULL)
5983 return FALSE;
5984
5985 memcpy (sym, parm->name, len);
5986 sym[len + 2] = 0;
5987
5988 for (i = parm->lo; i <= parm->hi; i++)
5989 {
5990 struct elf_link_hash_entry *h;
5991
5992 sym[len + 0] = i / 10 + '0';
5993 sym[len + 1] = i % 10 + '0';
5994 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5995 if (h != NULL
5996 && !h->def_regular)
5997 {
5998 h->root.type = bfd_link_hash_defined;
5999 h->root.u.def.section = htab->sfpr;
6000 h->root.u.def.value = htab->sfpr->size;
6001 h->type = STT_FUNC;
6002 h->def_regular = 1;
6003 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6004 writing = TRUE;
6005 if (htab->sfpr->contents == NULL)
6006 {
6007 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6008 if (htab->sfpr->contents == NULL)
6009 return FALSE;
6010 }
6011 }
6012 if (writing)
6013 {
6014 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6015 if (i != parm->hi)
6016 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6017 else
6018 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6019 htab->sfpr->size = p - htab->sfpr->contents;
6020 }
6021 }
6022
6023 return TRUE;
6024 }
6025
6026 static bfd_byte *
6027 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6028 {
6029 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6030 return p + 4;
6031 }
6032
6033 static bfd_byte *
6034 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6035 {
6036 p = savegpr0 (abfd, p, r);
6037 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6038 p = p + 4;
6039 bfd_put_32 (abfd, BLR, p);
6040 return p + 4;
6041 }
6042
6043 static bfd_byte *
6044 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6045 {
6046 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6047 return p + 4;
6048 }
6049
6050 static bfd_byte *
6051 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6052 {
6053 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6054 p = p + 4;
6055 p = restgpr0 (abfd, p, r);
6056 bfd_put_32 (abfd, MTLR_R0, p);
6057 p = p + 4;
6058 if (r == 29)
6059 {
6060 p = restgpr0 (abfd, p, 30);
6061 p = restgpr0 (abfd, p, 31);
6062 }
6063 bfd_put_32 (abfd, BLR, p);
6064 return p + 4;
6065 }
6066
6067 static bfd_byte *
6068 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6069 {
6070 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6071 return p + 4;
6072 }
6073
6074 static bfd_byte *
6075 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6076 {
6077 p = savegpr1 (abfd, p, r);
6078 bfd_put_32 (abfd, BLR, p);
6079 return p + 4;
6080 }
6081
6082 static bfd_byte *
6083 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6084 {
6085 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6086 return p + 4;
6087 }
6088
6089 static bfd_byte *
6090 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6091 {
6092 p = restgpr1 (abfd, p, r);
6093 bfd_put_32 (abfd, BLR, p);
6094 return p + 4;
6095 }
6096
6097 static bfd_byte *
6098 savefpr (bfd *abfd, bfd_byte *p, int r)
6099 {
6100 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6101 return p + 4;
6102 }
6103
6104 static bfd_byte *
6105 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6106 {
6107 p = savefpr (abfd, p, r);
6108 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6109 p = p + 4;
6110 bfd_put_32 (abfd, BLR, p);
6111 return p + 4;
6112 }
6113
6114 static bfd_byte *
6115 restfpr (bfd *abfd, bfd_byte *p, int r)
6116 {
6117 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6118 return p + 4;
6119 }
6120
6121 static bfd_byte *
6122 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6123 {
6124 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6125 p = p + 4;
6126 p = restfpr (abfd, p, r);
6127 bfd_put_32 (abfd, MTLR_R0, p);
6128 p = p + 4;
6129 if (r == 29)
6130 {
6131 p = restfpr (abfd, p, 30);
6132 p = restfpr (abfd, p, 31);
6133 }
6134 bfd_put_32 (abfd, BLR, p);
6135 return p + 4;
6136 }
6137
6138 static bfd_byte *
6139 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6140 {
6141 p = savefpr (abfd, p, r);
6142 bfd_put_32 (abfd, BLR, p);
6143 return p + 4;
6144 }
6145
6146 static bfd_byte *
6147 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6148 {
6149 p = restfpr (abfd, p, r);
6150 bfd_put_32 (abfd, BLR, p);
6151 return p + 4;
6152 }
6153
6154 static bfd_byte *
6155 savevr (bfd *abfd, bfd_byte *p, int r)
6156 {
6157 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6158 p = p + 4;
6159 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6160 return p + 4;
6161 }
6162
6163 static bfd_byte *
6164 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6165 {
6166 p = savevr (abfd, p, r);
6167 bfd_put_32 (abfd, BLR, p);
6168 return p + 4;
6169 }
6170
6171 static bfd_byte *
6172 restvr (bfd *abfd, bfd_byte *p, int r)
6173 {
6174 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6175 p = p + 4;
6176 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6177 return p + 4;
6178 }
6179
6180 static bfd_byte *
6181 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6182 {
6183 p = restvr (abfd, p, r);
6184 bfd_put_32 (abfd, BLR, p);
6185 return p + 4;
6186 }
6187
6188 /* Called via elf_link_hash_traverse to transfer dynamic linking
6189 information on function code symbol entries to their corresponding
6190 function descriptor symbol entries. */
6191
6192 static bfd_boolean
6193 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6194 {
6195 struct bfd_link_info *info;
6196 struct ppc_link_hash_table *htab;
6197 struct plt_entry *ent;
6198 struct ppc_link_hash_entry *fh;
6199 struct ppc_link_hash_entry *fdh;
6200 bfd_boolean force_local;
6201
6202 fh = (struct ppc_link_hash_entry *) h;
6203 if (fh->elf.root.type == bfd_link_hash_indirect)
6204 return TRUE;
6205
6206 if (fh->elf.root.type == bfd_link_hash_warning)
6207 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6208
6209 info = inf;
6210 htab = ppc_hash_table (info);
6211 if (htab == NULL)
6212 return FALSE;
6213
6214 /* Resolve undefined references to dot-symbols as the value
6215 in the function descriptor, if we have one in a regular object.
6216 This is to satisfy cases like ".quad .foo". Calls to functions
6217 in dynamic objects are handled elsewhere. */
6218 if (fh->elf.root.type == bfd_link_hash_undefweak
6219 && fh->was_undefined
6220 && (fdh = defined_func_desc (fh)) != NULL
6221 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6222 && opd_entry_value (fdh->elf.root.u.def.section,
6223 fdh->elf.root.u.def.value,
6224 &fh->elf.root.u.def.section,
6225 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6226 {
6227 fh->elf.root.type = fdh->elf.root.type;
6228 fh->elf.forced_local = 1;
6229 fh->elf.def_regular = fdh->elf.def_regular;
6230 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6231 }
6232
6233 /* If this is a function code symbol, transfer dynamic linking
6234 information to the function descriptor symbol. */
6235 if (!fh->is_func)
6236 return TRUE;
6237
6238 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6239 if (ent->plt.refcount > 0)
6240 break;
6241 if (ent == NULL
6242 || fh->elf.root.root.string[0] != '.'
6243 || fh->elf.root.root.string[1] == '\0')
6244 return TRUE;
6245
6246 /* Find the corresponding function descriptor symbol. Create it
6247 as undefined if necessary. */
6248
6249 fdh = lookup_fdh (fh, htab);
6250 if (fdh == NULL
6251 && !info->executable
6252 && (fh->elf.root.type == bfd_link_hash_undefined
6253 || fh->elf.root.type == bfd_link_hash_undefweak))
6254 {
6255 fdh = make_fdh (info, fh);
6256 if (fdh == NULL)
6257 return FALSE;
6258 }
6259
6260 /* Fake function descriptors are made undefweak. If the function
6261 code symbol is strong undefined, make the fake sym the same.
6262 If the function code symbol is defined, then force the fake
6263 descriptor local; We can't support overriding of symbols in a
6264 shared library on a fake descriptor. */
6265
6266 if (fdh != NULL
6267 && fdh->fake
6268 && fdh->elf.root.type == bfd_link_hash_undefweak)
6269 {
6270 if (fh->elf.root.type == bfd_link_hash_undefined)
6271 {
6272 fdh->elf.root.type = bfd_link_hash_undefined;
6273 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6274 }
6275 else if (fh->elf.root.type == bfd_link_hash_defined
6276 || fh->elf.root.type == bfd_link_hash_defweak)
6277 {
6278 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6279 }
6280 }
6281
6282 if (fdh != NULL
6283 && !fdh->elf.forced_local
6284 && (!info->executable
6285 || fdh->elf.def_dynamic
6286 || fdh->elf.ref_dynamic
6287 || (fdh->elf.root.type == bfd_link_hash_undefweak
6288 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6289 {
6290 if (fdh->elf.dynindx == -1)
6291 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6292 return FALSE;
6293 fdh->elf.ref_regular |= fh->elf.ref_regular;
6294 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6295 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6296 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6297 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6298 {
6299 move_plt_plist (fh, fdh);
6300 fdh->elf.needs_plt = 1;
6301 }
6302 fdh->is_func_descriptor = 1;
6303 fdh->oh = fh;
6304 fh->oh = fdh;
6305 }
6306
6307 /* Now that the info is on the function descriptor, clear the
6308 function code sym info. Any function code syms for which we
6309 don't have a definition in a regular file, we force local.
6310 This prevents a shared library from exporting syms that have
6311 been imported from another library. Function code syms that
6312 are really in the library we must leave global to prevent the
6313 linker dragging in a definition from a static library. */
6314 force_local = (!fh->elf.def_regular
6315 || fdh == NULL
6316 || !fdh->elf.def_regular
6317 || fdh->elf.forced_local);
6318 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6319
6320 return TRUE;
6321 }
6322
6323 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6324 this hook to a) provide some gcc support functions, and b) transfer
6325 dynamic linking information gathered so far on function code symbol
6326 entries, to their corresponding function descriptor symbol entries. */
6327
6328 static bfd_boolean
6329 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6330 struct bfd_link_info *info)
6331 {
6332 struct ppc_link_hash_table *htab;
6333 unsigned int i;
6334 const struct sfpr_def_parms funcs[] =
6335 {
6336 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6337 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6338 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6339 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6340 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6341 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6342 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6343 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6344 { "._savef", 14, 31, savefpr, savefpr1_tail },
6345 { "._restf", 14, 31, restfpr, restfpr1_tail },
6346 { "_savevr_", 20, 31, savevr, savevr_tail },
6347 { "_restvr_", 20, 31, restvr, restvr_tail }
6348 };
6349
6350 htab = ppc_hash_table (info);
6351 if (htab == NULL)
6352 return FALSE;
6353
6354 if (htab->sfpr == NULL)
6355 /* We don't have any relocs. */
6356 return TRUE;
6357
6358 /* Provide any missing _save* and _rest* functions. */
6359 htab->sfpr->size = 0;
6360 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6361 if (!sfpr_define (info, &funcs[i]))
6362 return FALSE;
6363
6364 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6365
6366 if (htab->sfpr->size == 0)
6367 htab->sfpr->flags |= SEC_EXCLUDE;
6368
6369 return TRUE;
6370 }
6371
6372 /* Adjust a symbol defined by a dynamic object and referenced by a
6373 regular object. The current definition is in some section of the
6374 dynamic object, but we're not including those sections. We have to
6375 change the definition to something the rest of the link can
6376 understand. */
6377
6378 static bfd_boolean
6379 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6380 struct elf_link_hash_entry *h)
6381 {
6382 struct ppc_link_hash_table *htab;
6383 asection *s;
6384
6385 htab = ppc_hash_table (info);
6386 if (htab == NULL)
6387 return FALSE;
6388
6389 /* Deal with function syms. */
6390 if (h->type == STT_FUNC
6391 || h->type == STT_GNU_IFUNC
6392 || h->needs_plt)
6393 {
6394 /* Clear procedure linkage table information for any symbol that
6395 won't need a .plt entry. */
6396 struct plt_entry *ent;
6397 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6398 if (ent->plt.refcount > 0)
6399 break;
6400 if (ent == NULL
6401 || (h->type != STT_GNU_IFUNC
6402 && (SYMBOL_CALLS_LOCAL (info, h)
6403 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6404 && h->root.type == bfd_link_hash_undefweak))))
6405 {
6406 h->plt.plist = NULL;
6407 h->needs_plt = 0;
6408 }
6409 }
6410 else
6411 h->plt.plist = NULL;
6412
6413 /* If this is a weak symbol, and there is a real definition, the
6414 processor independent code will have arranged for us to see the
6415 real definition first, and we can just use the same value. */
6416 if (h->u.weakdef != NULL)
6417 {
6418 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6419 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6420 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6421 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6422 if (ELIMINATE_COPY_RELOCS)
6423 h->non_got_ref = h->u.weakdef->non_got_ref;
6424 return TRUE;
6425 }
6426
6427 /* If we are creating a shared library, we must presume that the
6428 only references to the symbol are via the global offset table.
6429 For such cases we need not do anything here; the relocations will
6430 be handled correctly by relocate_section. */
6431 if (info->shared)
6432 return TRUE;
6433
6434 /* If there are no references to this symbol that do not use the
6435 GOT, we don't need to generate a copy reloc. */
6436 if (!h->non_got_ref)
6437 return TRUE;
6438
6439 /* Don't generate a copy reloc for symbols defined in the executable. */
6440 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6441 return TRUE;
6442
6443 if (ELIMINATE_COPY_RELOCS)
6444 {
6445 struct ppc_link_hash_entry * eh;
6446 struct ppc_dyn_relocs *p;
6447
6448 eh = (struct ppc_link_hash_entry *) h;
6449 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6450 {
6451 s = p->sec->output_section;
6452 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6453 break;
6454 }
6455
6456 /* If we didn't find any dynamic relocs in read-only sections, then
6457 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6458 if (p == NULL)
6459 {
6460 h->non_got_ref = 0;
6461 return TRUE;
6462 }
6463 }
6464
6465 if (h->plt.plist != NULL)
6466 {
6467 /* We should never get here, but unfortunately there are versions
6468 of gcc out there that improperly (for this ABI) put initialized
6469 function pointers, vtable refs and suchlike in read-only
6470 sections. Allow them to proceed, but warn that this might
6471 break at runtime. */
6472 (*_bfd_error_handler)
6473 (_("copy reloc against `%s' requires lazy plt linking; "
6474 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6475 h->root.root.string);
6476 }
6477
6478 /* This is a reference to a symbol defined by a dynamic object which
6479 is not a function. */
6480
6481 if (h->size == 0)
6482 {
6483 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6484 h->root.root.string);
6485 return TRUE;
6486 }
6487
6488 /* We must allocate the symbol in our .dynbss section, which will
6489 become part of the .bss section of the executable. There will be
6490 an entry for this symbol in the .dynsym section. The dynamic
6491 object will contain position independent code, so all references
6492 from the dynamic object to this symbol will go through the global
6493 offset table. The dynamic linker will use the .dynsym entry to
6494 determine the address it must put in the global offset table, so
6495 both the dynamic object and the regular object will refer to the
6496 same memory location for the variable. */
6497
6498 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6499 to copy the initial value out of the dynamic object and into the
6500 runtime process image. We need to remember the offset into the
6501 .rela.bss section we are going to use. */
6502 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6503 {
6504 htab->relbss->size += sizeof (Elf64_External_Rela);
6505 h->needs_copy = 1;
6506 }
6507
6508 s = htab->dynbss;
6509
6510 return _bfd_elf_adjust_dynamic_copy (h, s);
6511 }
6512
6513 /* If given a function descriptor symbol, hide both the function code
6514 sym and the descriptor. */
6515 static void
6516 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6517 struct elf_link_hash_entry *h,
6518 bfd_boolean force_local)
6519 {
6520 struct ppc_link_hash_entry *eh;
6521 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6522
6523 eh = (struct ppc_link_hash_entry *) h;
6524 if (eh->is_func_descriptor)
6525 {
6526 struct ppc_link_hash_entry *fh = eh->oh;
6527
6528 if (fh == NULL)
6529 {
6530 const char *p, *q;
6531 struct ppc_link_hash_table *htab;
6532 char save;
6533
6534 /* We aren't supposed to use alloca in BFD because on
6535 systems which do not have alloca the version in libiberty
6536 calls xmalloc, which might cause the program to crash
6537 when it runs out of memory. This function doesn't have a
6538 return status, so there's no way to gracefully return an
6539 error. So cheat. We know that string[-1] can be safely
6540 accessed; It's either a string in an ELF string table,
6541 or allocated in an objalloc structure. */
6542
6543 p = eh->elf.root.root.string - 1;
6544 save = *p;
6545 *(char *) p = '.';
6546 htab = ppc_hash_table (info);
6547 if (htab == NULL)
6548 return;
6549
6550 fh = (struct ppc_link_hash_entry *)
6551 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6552 *(char *) p = save;
6553
6554 /* Unfortunately, if it so happens that the string we were
6555 looking for was allocated immediately before this string,
6556 then we overwrote the string terminator. That's the only
6557 reason the lookup should fail. */
6558 if (fh == NULL)
6559 {
6560 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6561 while (q >= eh->elf.root.root.string && *q == *p)
6562 --q, --p;
6563 if (q < eh->elf.root.root.string && *p == '.')
6564 fh = (struct ppc_link_hash_entry *)
6565 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6566 }
6567 if (fh != NULL)
6568 {
6569 eh->oh = fh;
6570 fh->oh = eh;
6571 }
6572 }
6573 if (fh != NULL)
6574 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6575 }
6576 }
6577
6578 static bfd_boolean
6579 get_sym_h (struct elf_link_hash_entry **hp,
6580 Elf_Internal_Sym **symp,
6581 asection **symsecp,
6582 unsigned char **tls_maskp,
6583 Elf_Internal_Sym **locsymsp,
6584 unsigned long r_symndx,
6585 bfd *ibfd)
6586 {
6587 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6588
6589 if (r_symndx >= symtab_hdr->sh_info)
6590 {
6591 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6592 struct elf_link_hash_entry *h;
6593
6594 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6595 h = elf_follow_link (h);
6596
6597 if (hp != NULL)
6598 *hp = h;
6599
6600 if (symp != NULL)
6601 *symp = NULL;
6602
6603 if (symsecp != NULL)
6604 {
6605 asection *symsec = NULL;
6606 if (h->root.type == bfd_link_hash_defined
6607 || h->root.type == bfd_link_hash_defweak)
6608 symsec = h->root.u.def.section;
6609 *symsecp = symsec;
6610 }
6611
6612 if (tls_maskp != NULL)
6613 {
6614 struct ppc_link_hash_entry *eh;
6615
6616 eh = (struct ppc_link_hash_entry *) h;
6617 *tls_maskp = &eh->tls_mask;
6618 }
6619 }
6620 else
6621 {
6622 Elf_Internal_Sym *sym;
6623 Elf_Internal_Sym *locsyms = *locsymsp;
6624
6625 if (locsyms == NULL)
6626 {
6627 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6628 if (locsyms == NULL)
6629 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6630 symtab_hdr->sh_info,
6631 0, NULL, NULL, NULL);
6632 if (locsyms == NULL)
6633 return FALSE;
6634 *locsymsp = locsyms;
6635 }
6636 sym = locsyms + r_symndx;
6637
6638 if (hp != NULL)
6639 *hp = NULL;
6640
6641 if (symp != NULL)
6642 *symp = sym;
6643
6644 if (symsecp != NULL)
6645 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6646
6647 if (tls_maskp != NULL)
6648 {
6649 struct got_entry **lgot_ents;
6650 unsigned char *tls_mask;
6651
6652 tls_mask = NULL;
6653 lgot_ents = elf_local_got_ents (ibfd);
6654 if (lgot_ents != NULL)
6655 {
6656 struct plt_entry **local_plt = (struct plt_entry **)
6657 (lgot_ents + symtab_hdr->sh_info);
6658 unsigned char *lgot_masks = (unsigned char *)
6659 (local_plt + symtab_hdr->sh_info);
6660 tls_mask = &lgot_masks[r_symndx];
6661 }
6662 *tls_maskp = tls_mask;
6663 }
6664 }
6665 return TRUE;
6666 }
6667
6668 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6669 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6670 type suitable for optimization, and 1 otherwise. */
6671
6672 static int
6673 get_tls_mask (unsigned char **tls_maskp,
6674 unsigned long *toc_symndx,
6675 bfd_vma *toc_addend,
6676 Elf_Internal_Sym **locsymsp,
6677 const Elf_Internal_Rela *rel,
6678 bfd *ibfd)
6679 {
6680 unsigned long r_symndx;
6681 int next_r;
6682 struct elf_link_hash_entry *h;
6683 Elf_Internal_Sym *sym;
6684 asection *sec;
6685 bfd_vma off;
6686
6687 r_symndx = ELF64_R_SYM (rel->r_info);
6688 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6689 return 0;
6690
6691 if ((*tls_maskp != NULL && **tls_maskp != 0)
6692 || sec == NULL
6693 || ppc64_elf_section_data (sec) == NULL
6694 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6695 return 1;
6696
6697 /* Look inside a TOC section too. */
6698 if (h != NULL)
6699 {
6700 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6701 off = h->root.u.def.value;
6702 }
6703 else
6704 off = sym->st_value;
6705 off += rel->r_addend;
6706 BFD_ASSERT (off % 8 == 0);
6707 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6708 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6709 if (toc_symndx != NULL)
6710 *toc_symndx = r_symndx;
6711 if (toc_addend != NULL)
6712 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6713 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6714 return 0;
6715 if ((h == NULL || is_static_defined (h))
6716 && (next_r == -1 || next_r == -2))
6717 return 1 - next_r;
6718 return 1;
6719 }
6720
6721 /* Adjust all global syms defined in opd sections. In gcc generated
6722 code for the old ABI, these will already have been done. */
6723
6724 static bfd_boolean
6725 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6726 {
6727 struct ppc_link_hash_entry *eh;
6728 asection *sym_sec;
6729 struct _opd_sec_data *opd;
6730
6731 if (h->root.type == bfd_link_hash_indirect)
6732 return TRUE;
6733
6734 if (h->root.type == bfd_link_hash_warning)
6735 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6736
6737 if (h->root.type != bfd_link_hash_defined
6738 && h->root.type != bfd_link_hash_defweak)
6739 return TRUE;
6740
6741 eh = (struct ppc_link_hash_entry *) h;
6742 if (eh->adjust_done)
6743 return TRUE;
6744
6745 sym_sec = eh->elf.root.u.def.section;
6746 opd = get_opd_info (sym_sec);
6747 if (opd != NULL && opd->adjust != NULL)
6748 {
6749 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6750 if (adjust == -1)
6751 {
6752 /* This entry has been deleted. */
6753 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6754 if (dsec == NULL)
6755 {
6756 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6757 if (elf_discarded_section (dsec))
6758 {
6759 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6760 break;
6761 }
6762 }
6763 eh->elf.root.u.def.value = 0;
6764 eh->elf.root.u.def.section = dsec;
6765 }
6766 else
6767 eh->elf.root.u.def.value += adjust;
6768 eh->adjust_done = 1;
6769 }
6770 return TRUE;
6771 }
6772
6773 /* Handles decrementing dynamic reloc counts for the reloc specified by
6774 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6775 have already been determined. */
6776
6777 static bfd_boolean
6778 dec_dynrel_count (bfd_vma r_info,
6779 asection *sec,
6780 struct bfd_link_info *info,
6781 Elf_Internal_Sym **local_syms,
6782 struct elf_link_hash_entry *h,
6783 asection *sym_sec)
6784 {
6785 enum elf_ppc64_reloc_type r_type;
6786 struct ppc_dyn_relocs *p;
6787 struct ppc_dyn_relocs **pp;
6788
6789 /* Can this reloc be dynamic? This switch, and later tests here
6790 should be kept in sync with the code in check_relocs. */
6791 r_type = ELF64_R_TYPE (r_info);
6792 switch (r_type)
6793 {
6794 default:
6795 return TRUE;
6796
6797 case R_PPC64_TPREL16:
6798 case R_PPC64_TPREL16_LO:
6799 case R_PPC64_TPREL16_HI:
6800 case R_PPC64_TPREL16_HA:
6801 case R_PPC64_TPREL16_DS:
6802 case R_PPC64_TPREL16_LO_DS:
6803 case R_PPC64_TPREL16_HIGHER:
6804 case R_PPC64_TPREL16_HIGHERA:
6805 case R_PPC64_TPREL16_HIGHEST:
6806 case R_PPC64_TPREL16_HIGHESTA:
6807 if (!info->shared)
6808 return TRUE;
6809
6810 case R_PPC64_TPREL64:
6811 case R_PPC64_DTPMOD64:
6812 case R_PPC64_DTPREL64:
6813 case R_PPC64_ADDR64:
6814 case R_PPC64_REL30:
6815 case R_PPC64_REL32:
6816 case R_PPC64_REL64:
6817 case R_PPC64_ADDR14:
6818 case R_PPC64_ADDR14_BRNTAKEN:
6819 case R_PPC64_ADDR14_BRTAKEN:
6820 case R_PPC64_ADDR16:
6821 case R_PPC64_ADDR16_DS:
6822 case R_PPC64_ADDR16_HA:
6823 case R_PPC64_ADDR16_HI:
6824 case R_PPC64_ADDR16_HIGHER:
6825 case R_PPC64_ADDR16_HIGHERA:
6826 case R_PPC64_ADDR16_HIGHEST:
6827 case R_PPC64_ADDR16_HIGHESTA:
6828 case R_PPC64_ADDR16_LO:
6829 case R_PPC64_ADDR16_LO_DS:
6830 case R_PPC64_ADDR24:
6831 case R_PPC64_ADDR32:
6832 case R_PPC64_UADDR16:
6833 case R_PPC64_UADDR32:
6834 case R_PPC64_UADDR64:
6835 case R_PPC64_TOC:
6836 break;
6837 }
6838
6839 if (local_syms != NULL)
6840 {
6841 unsigned long r_symndx;
6842 Elf_Internal_Sym *sym;
6843 bfd *ibfd = sec->owner;
6844
6845 r_symndx = ELF64_R_SYM (r_info);
6846 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6847 return FALSE;
6848 }
6849
6850 if ((info->shared
6851 && (must_be_dyn_reloc (info, r_type)
6852 || (h != NULL
6853 && (!info->symbolic
6854 || h->root.type == bfd_link_hash_defweak
6855 || !h->def_regular))))
6856 || (ELIMINATE_COPY_RELOCS
6857 && !info->shared
6858 && h != NULL
6859 && (h->root.type == bfd_link_hash_defweak
6860 || !h->def_regular)))
6861 ;
6862 else
6863 return TRUE;
6864
6865 if (h != NULL)
6866 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6867 else
6868 {
6869 if (sym_sec != NULL)
6870 {
6871 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6872 pp = (struct ppc_dyn_relocs **) vpp;
6873 }
6874 else
6875 {
6876 void *vpp = &elf_section_data (sec)->local_dynrel;
6877 pp = (struct ppc_dyn_relocs **) vpp;
6878 }
6879
6880 /* elf_gc_sweep may have already removed all dyn relocs associated
6881 with local syms for a given section. Don't report a dynreloc
6882 miscount. */
6883 if (*pp == NULL)
6884 return TRUE;
6885 }
6886
6887 while ((p = *pp) != NULL)
6888 {
6889 if (p->sec == sec)
6890 {
6891 if (!must_be_dyn_reloc (info, r_type))
6892 p->pc_count -= 1;
6893 p->count -= 1;
6894 if (p->count == 0)
6895 *pp = p->next;
6896 return TRUE;
6897 }
6898 pp = &p->next;
6899 }
6900
6901 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6902 sec->owner, sec);
6903 bfd_set_error (bfd_error_bad_value);
6904 return FALSE;
6905 }
6906
6907 /* Remove unused Official Procedure Descriptor entries. Currently we
6908 only remove those associated with functions in discarded link-once
6909 sections, or weakly defined functions that have been overridden. It
6910 would be possible to remove many more entries for statically linked
6911 applications. */
6912
6913 bfd_boolean
6914 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6915 {
6916 bfd *ibfd;
6917 bfd_boolean some_edited = FALSE;
6918 asection *need_pad = NULL;
6919
6920 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6921 {
6922 asection *sec;
6923 Elf_Internal_Rela *relstart, *rel, *relend;
6924 Elf_Internal_Shdr *symtab_hdr;
6925 Elf_Internal_Sym *local_syms;
6926 bfd_vma offset;
6927 struct _opd_sec_data *opd;
6928 bfd_boolean need_edit, add_aux_fields;
6929 bfd_size_type cnt_16b = 0;
6930
6931 if (!is_ppc64_elf (ibfd))
6932 continue;
6933
6934 sec = bfd_get_section_by_name (ibfd, ".opd");
6935 if (sec == NULL || sec->size == 0)
6936 continue;
6937
6938 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6939 continue;
6940
6941 if (sec->output_section == bfd_abs_section_ptr)
6942 continue;
6943
6944 /* Look through the section relocs. */
6945 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6946 continue;
6947
6948 local_syms = NULL;
6949 symtab_hdr = &elf_symtab_hdr (ibfd);
6950
6951 /* Read the relocations. */
6952 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6953 info->keep_memory);
6954 if (relstart == NULL)
6955 return FALSE;
6956
6957 /* First run through the relocs to check they are sane, and to
6958 determine whether we need to edit this opd section. */
6959 need_edit = FALSE;
6960 need_pad = sec;
6961 offset = 0;
6962 relend = relstart + sec->reloc_count;
6963 for (rel = relstart; rel < relend; )
6964 {
6965 enum elf_ppc64_reloc_type r_type;
6966 unsigned long r_symndx;
6967 asection *sym_sec;
6968 struct elf_link_hash_entry *h;
6969 Elf_Internal_Sym *sym;
6970
6971 /* .opd contains a regular array of 16 or 24 byte entries. We're
6972 only interested in the reloc pointing to a function entry
6973 point. */
6974 if (rel->r_offset != offset
6975 || rel + 1 >= relend
6976 || (rel + 1)->r_offset != offset + 8)
6977 {
6978 /* If someone messes with .opd alignment then after a
6979 "ld -r" we might have padding in the middle of .opd.
6980 Also, there's nothing to prevent someone putting
6981 something silly in .opd with the assembler. No .opd
6982 optimization for them! */
6983 broken_opd:
6984 (*_bfd_error_handler)
6985 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6986 need_edit = FALSE;
6987 break;
6988 }
6989
6990 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6991 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6992 {
6993 (*_bfd_error_handler)
6994 (_("%B: unexpected reloc type %u in .opd section"),
6995 ibfd, r_type);
6996 need_edit = FALSE;
6997 break;
6998 }
6999
7000 r_symndx = ELF64_R_SYM (rel->r_info);
7001 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7002 r_symndx, ibfd))
7003 goto error_ret;
7004
7005 if (sym_sec == NULL || sym_sec->owner == NULL)
7006 {
7007 const char *sym_name;
7008 if (h != NULL)
7009 sym_name = h->root.root.string;
7010 else
7011 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7012 sym_sec);
7013
7014 (*_bfd_error_handler)
7015 (_("%B: undefined sym `%s' in .opd section"),
7016 ibfd, sym_name);
7017 need_edit = FALSE;
7018 break;
7019 }
7020
7021 /* opd entries are always for functions defined in the
7022 current input bfd. If the symbol isn't defined in the
7023 input bfd, then we won't be using the function in this
7024 bfd; It must be defined in a linkonce section in another
7025 bfd, or is weak. It's also possible that we are
7026 discarding the function due to a linker script /DISCARD/,
7027 which we test for via the output_section. */
7028 if (sym_sec->owner != ibfd
7029 || sym_sec->output_section == bfd_abs_section_ptr)
7030 need_edit = TRUE;
7031
7032 rel += 2;
7033 if (rel == relend
7034 || (rel + 1 == relend && rel->r_offset == offset + 16))
7035 {
7036 if (sec->size == offset + 24)
7037 {
7038 need_pad = NULL;
7039 break;
7040 }
7041 if (rel == relend && sec->size == offset + 16)
7042 {
7043 cnt_16b++;
7044 break;
7045 }
7046 goto broken_opd;
7047 }
7048
7049 if (rel->r_offset == offset + 24)
7050 offset += 24;
7051 else if (rel->r_offset != offset + 16)
7052 goto broken_opd;
7053 else if (rel + 1 < relend
7054 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7055 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7056 {
7057 offset += 16;
7058 cnt_16b++;
7059 }
7060 else if (rel + 2 < relend
7061 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7062 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7063 {
7064 offset += 24;
7065 rel += 1;
7066 }
7067 else
7068 goto broken_opd;
7069 }
7070
7071 add_aux_fields = non_overlapping && cnt_16b > 0;
7072
7073 if (need_edit || add_aux_fields)
7074 {
7075 Elf_Internal_Rela *write_rel;
7076 Elf_Internal_Shdr *rel_hdr;
7077 bfd_byte *rptr, *wptr;
7078 bfd_byte *new_contents;
7079 bfd_boolean skip;
7080 long opd_ent_size;
7081 bfd_size_type amt;
7082
7083 new_contents = NULL;
7084 amt = sec->size * sizeof (long) / 8;
7085 opd = &ppc64_elf_section_data (sec)->u.opd;
7086 opd->adjust = bfd_zalloc (sec->owner, amt);
7087 if (opd->adjust == NULL)
7088 return FALSE;
7089 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7090
7091 /* This seems a waste of time as input .opd sections are all
7092 zeros as generated by gcc, but I suppose there's no reason
7093 this will always be so. We might start putting something in
7094 the third word of .opd entries. */
7095 if ((sec->flags & SEC_IN_MEMORY) == 0)
7096 {
7097 bfd_byte *loc;
7098 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7099 {
7100 if (loc != NULL)
7101 free (loc);
7102 error_ret:
7103 if (local_syms != NULL
7104 && symtab_hdr->contents != (unsigned char *) local_syms)
7105 free (local_syms);
7106 if (elf_section_data (sec)->relocs != relstart)
7107 free (relstart);
7108 return FALSE;
7109 }
7110 sec->contents = loc;
7111 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7112 }
7113
7114 elf_section_data (sec)->relocs = relstart;
7115
7116 new_contents = sec->contents;
7117 if (add_aux_fields)
7118 {
7119 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7120 if (new_contents == NULL)
7121 return FALSE;
7122 need_pad = FALSE;
7123 }
7124 wptr = new_contents;
7125 rptr = sec->contents;
7126
7127 write_rel = relstart;
7128 skip = FALSE;
7129 offset = 0;
7130 opd_ent_size = 0;
7131 for (rel = relstart; rel < relend; rel++)
7132 {
7133 unsigned long r_symndx;
7134 asection *sym_sec;
7135 struct elf_link_hash_entry *h;
7136 Elf_Internal_Sym *sym;
7137
7138 r_symndx = ELF64_R_SYM (rel->r_info);
7139 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7140 r_symndx, ibfd))
7141 goto error_ret;
7142
7143 if (rel->r_offset == offset)
7144 {
7145 struct ppc_link_hash_entry *fdh = NULL;
7146
7147 /* See if the .opd entry is full 24 byte or
7148 16 byte (with fd_aux entry overlapped with next
7149 fd_func). */
7150 opd_ent_size = 24;
7151 if ((rel + 2 == relend && sec->size == offset + 16)
7152 || (rel + 3 < relend
7153 && rel[2].r_offset == offset + 16
7154 && rel[3].r_offset == offset + 24
7155 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7156 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7157 opd_ent_size = 16;
7158
7159 if (h != NULL
7160 && h->root.root.string[0] == '.')
7161 {
7162 struct ppc_link_hash_table *htab;
7163
7164 htab = ppc_hash_table (info);
7165 if (htab != NULL)
7166 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7167 htab);
7168 if (fdh != NULL
7169 && fdh->elf.root.type != bfd_link_hash_defined
7170 && fdh->elf.root.type != bfd_link_hash_defweak)
7171 fdh = NULL;
7172 }
7173
7174 skip = (sym_sec->owner != ibfd
7175 || sym_sec->output_section == bfd_abs_section_ptr);
7176 if (skip)
7177 {
7178 if (fdh != NULL && sym_sec->owner == ibfd)
7179 {
7180 /* Arrange for the function descriptor sym
7181 to be dropped. */
7182 fdh->elf.root.u.def.value = 0;
7183 fdh->elf.root.u.def.section = sym_sec;
7184 }
7185 opd->adjust[rel->r_offset / 8] = -1;
7186 }
7187 else
7188 {
7189 /* We'll be keeping this opd entry. */
7190
7191 if (fdh != NULL)
7192 {
7193 /* Redefine the function descriptor symbol to
7194 this location in the opd section. It is
7195 necessary to update the value here rather
7196 than using an array of adjustments as we do
7197 for local symbols, because various places
7198 in the generic ELF code use the value
7199 stored in u.def.value. */
7200 fdh->elf.root.u.def.value = wptr - new_contents;
7201 fdh->adjust_done = 1;
7202 }
7203
7204 /* Local syms are a bit tricky. We could
7205 tweak them as they can be cached, but
7206 we'd need to look through the local syms
7207 for the function descriptor sym which we
7208 don't have at the moment. So keep an
7209 array of adjustments. */
7210 opd->adjust[rel->r_offset / 8]
7211 = (wptr - new_contents) - (rptr - sec->contents);
7212
7213 if (wptr != rptr)
7214 memcpy (wptr, rptr, opd_ent_size);
7215 wptr += opd_ent_size;
7216 if (add_aux_fields && opd_ent_size == 16)
7217 {
7218 memset (wptr, '\0', 8);
7219 wptr += 8;
7220 }
7221 }
7222 rptr += opd_ent_size;
7223 offset += opd_ent_size;
7224 }
7225
7226 if (skip)
7227 {
7228 if (!NO_OPD_RELOCS
7229 && !info->relocatable
7230 && !dec_dynrel_count (rel->r_info, sec, info,
7231 NULL, h, sym_sec))
7232 goto error_ret;
7233 }
7234 else
7235 {
7236 /* We need to adjust any reloc offsets to point to the
7237 new opd entries. While we're at it, we may as well
7238 remove redundant relocs. */
7239 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7240 if (write_rel != rel)
7241 memcpy (write_rel, rel, sizeof (*rel));
7242 ++write_rel;
7243 }
7244 }
7245
7246 sec->size = wptr - new_contents;
7247 sec->reloc_count = write_rel - relstart;
7248 if (add_aux_fields)
7249 {
7250 free (sec->contents);
7251 sec->contents = new_contents;
7252 }
7253
7254 /* Fudge the header size too, as this is used later in
7255 elf_bfd_final_link if we are emitting relocs. */
7256 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7257 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7258 some_edited = TRUE;
7259 }
7260 else if (elf_section_data (sec)->relocs != relstart)
7261 free (relstart);
7262
7263 if (local_syms != NULL
7264 && symtab_hdr->contents != (unsigned char *) local_syms)
7265 {
7266 if (!info->keep_memory)
7267 free (local_syms);
7268 else
7269 symtab_hdr->contents = (unsigned char *) local_syms;
7270 }
7271 }
7272
7273 if (some_edited)
7274 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7275
7276 /* If we are doing a final link and the last .opd entry is just 16 byte
7277 long, add a 8 byte padding after it. */
7278 if (need_pad != NULL && !info->relocatable)
7279 {
7280 bfd_byte *p;
7281
7282 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7283 {
7284 BFD_ASSERT (need_pad->size > 0);
7285
7286 p = bfd_malloc (need_pad->size + 8);
7287 if (p == NULL)
7288 return FALSE;
7289
7290 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7291 p, 0, need_pad->size))
7292 return FALSE;
7293
7294 need_pad->contents = p;
7295 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7296 }
7297 else
7298 {
7299 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7300 if (p == NULL)
7301 return FALSE;
7302
7303 need_pad->contents = p;
7304 }
7305
7306 memset (need_pad->contents + need_pad->size, 0, 8);
7307 need_pad->size += 8;
7308 }
7309
7310 return TRUE;
7311 }
7312
7313 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7314
7315 asection *
7316 ppc64_elf_tls_setup (struct bfd_link_info *info,
7317 int no_tls_get_addr_opt,
7318 int *no_multi_toc)
7319 {
7320 struct ppc_link_hash_table *htab;
7321
7322 htab = ppc_hash_table (info);
7323 if (htab == NULL)
7324 return NULL;
7325
7326 if (*no_multi_toc)
7327 htab->do_multi_toc = 0;
7328 else if (!htab->do_multi_toc)
7329 *no_multi_toc = 1;
7330
7331 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7332 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7333 FALSE, FALSE, TRUE));
7334 /* Move dynamic linking info to the function descriptor sym. */
7335 if (htab->tls_get_addr != NULL)
7336 func_desc_adjust (&htab->tls_get_addr->elf, info);
7337 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7338 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7339 FALSE, FALSE, TRUE));
7340 if (!no_tls_get_addr_opt)
7341 {
7342 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7343
7344 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7345 FALSE, FALSE, TRUE);
7346 if (opt != NULL)
7347 func_desc_adjust (opt, info);
7348 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7349 FALSE, FALSE, TRUE);
7350 if (opt_fd != NULL
7351 && (opt_fd->root.type == bfd_link_hash_defined
7352 || opt_fd->root.type == bfd_link_hash_defweak))
7353 {
7354 /* If glibc supports an optimized __tls_get_addr call stub,
7355 signalled by the presence of __tls_get_addr_opt, and we'll
7356 be calling __tls_get_addr via a plt call stub, then
7357 make __tls_get_addr point to __tls_get_addr_opt. */
7358 tga_fd = &htab->tls_get_addr_fd->elf;
7359 if (htab->elf.dynamic_sections_created
7360 && tga_fd != NULL
7361 && (tga_fd->type == STT_FUNC
7362 || tga_fd->needs_plt)
7363 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7364 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7365 && tga_fd->root.type == bfd_link_hash_undefweak)))
7366 {
7367 struct plt_entry *ent;
7368
7369 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7370 if (ent->plt.refcount > 0)
7371 break;
7372 if (ent != NULL)
7373 {
7374 tga_fd->root.type = bfd_link_hash_indirect;
7375 tga_fd->root.u.i.link = &opt_fd->root;
7376 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7377 if (opt_fd->dynindx != -1)
7378 {
7379 /* Use __tls_get_addr_opt in dynamic relocations. */
7380 opt_fd->dynindx = -1;
7381 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7382 opt_fd->dynstr_index);
7383 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7384 return NULL;
7385 }
7386 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7387 tga = &htab->tls_get_addr->elf;
7388 if (opt != NULL && tga != NULL)
7389 {
7390 tga->root.type = bfd_link_hash_indirect;
7391 tga->root.u.i.link = &opt->root;
7392 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7393 _bfd_elf_link_hash_hide_symbol (info, opt,
7394 tga->forced_local);
7395 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7396 }
7397 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7398 htab->tls_get_addr_fd->is_func_descriptor = 1;
7399 if (htab->tls_get_addr != NULL)
7400 {
7401 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7402 htab->tls_get_addr->is_func = 1;
7403 }
7404 }
7405 }
7406 }
7407 else
7408 no_tls_get_addr_opt = TRUE;
7409 }
7410 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7411 return _bfd_elf_tls_setup (info->output_bfd, info);
7412 }
7413
7414 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7415 HASH1 or HASH2. */
7416
7417 static bfd_boolean
7418 branch_reloc_hash_match (const bfd *ibfd,
7419 const Elf_Internal_Rela *rel,
7420 const struct ppc_link_hash_entry *hash1,
7421 const struct ppc_link_hash_entry *hash2)
7422 {
7423 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7424 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7425 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7426
7427 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7428 {
7429 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7430 struct elf_link_hash_entry *h;
7431
7432 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7433 h = elf_follow_link (h);
7434 if (h == &hash1->elf || h == &hash2->elf)
7435 return TRUE;
7436 }
7437 return FALSE;
7438 }
7439
7440 /* Run through all the TLS relocs looking for optimization
7441 opportunities. The linker has been hacked (see ppc64elf.em) to do
7442 a preliminary section layout so that we know the TLS segment
7443 offsets. We can't optimize earlier because some optimizations need
7444 to know the tp offset, and we need to optimize before allocating
7445 dynamic relocations. */
7446
7447 bfd_boolean
7448 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7449 {
7450 bfd *ibfd;
7451 asection *sec;
7452 struct ppc_link_hash_table *htab;
7453 int pass;
7454
7455 if (info->relocatable || !info->executable)
7456 return TRUE;
7457
7458 htab = ppc_hash_table (info);
7459 if (htab == NULL)
7460 return FALSE;
7461
7462 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7463 {
7464 Elf_Internal_Sym *locsyms = NULL;
7465 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7466 unsigned char *toc_ref = NULL;
7467
7468 /* Look at all the sections for this file. Make two passes over
7469 the relocs. On the first pass, mark toc entries involved
7470 with tls relocs, and check that tls relocs involved in
7471 setting up a tls_get_addr call are indeed followed by such a
7472 call. If they are not, exclude them from the optimizations
7473 done on the second pass. */
7474 for (pass = 0; pass < 2; ++pass)
7475 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7476 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7477 {
7478 Elf_Internal_Rela *relstart, *rel, *relend;
7479
7480 /* Read the relocations. */
7481 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7482 info->keep_memory);
7483 if (relstart == NULL)
7484 return FALSE;
7485
7486 relend = relstart + sec->reloc_count;
7487 for (rel = relstart; rel < relend; rel++)
7488 {
7489 enum elf_ppc64_reloc_type r_type;
7490 unsigned long r_symndx;
7491 struct elf_link_hash_entry *h;
7492 Elf_Internal_Sym *sym;
7493 asection *sym_sec;
7494 unsigned char *tls_mask;
7495 unsigned char tls_set, tls_clear, tls_type = 0;
7496 bfd_vma value;
7497 bfd_boolean ok_tprel, is_local;
7498 long toc_ref_index = 0;
7499 int expecting_tls_get_addr = 0;
7500
7501 r_symndx = ELF64_R_SYM (rel->r_info);
7502 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7503 r_symndx, ibfd))
7504 {
7505 err_free_rel:
7506 if (elf_section_data (sec)->relocs != relstart)
7507 free (relstart);
7508 if (toc_ref != NULL)
7509 free (toc_ref);
7510 if (locsyms != NULL
7511 && (elf_symtab_hdr (ibfd).contents
7512 != (unsigned char *) locsyms))
7513 free (locsyms);
7514 return FALSE;
7515 }
7516
7517 if (h != NULL)
7518 {
7519 if (h->root.type == bfd_link_hash_defined
7520 || h->root.type == bfd_link_hash_defweak)
7521 value = h->root.u.def.value;
7522 else if (h->root.type == bfd_link_hash_undefweak)
7523 value = 0;
7524 else
7525 continue;
7526 }
7527 else
7528 /* Symbols referenced by TLS relocs must be of type
7529 STT_TLS. So no need for .opd local sym adjust. */
7530 value = sym->st_value;
7531
7532 ok_tprel = FALSE;
7533 is_local = FALSE;
7534 if (h == NULL
7535 || !h->def_dynamic)
7536 {
7537 is_local = TRUE;
7538 if (h != NULL
7539 && h->root.type == bfd_link_hash_undefweak)
7540 ok_tprel = TRUE;
7541 else
7542 {
7543 value += sym_sec->output_offset;
7544 value += sym_sec->output_section->vma;
7545 value -= htab->elf.tls_sec->vma;
7546 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7547 < (bfd_vma) 1 << 32);
7548 }
7549 }
7550
7551 r_type = ELF64_R_TYPE (rel->r_info);
7552 switch (r_type)
7553 {
7554 case R_PPC64_GOT_TLSLD16:
7555 case R_PPC64_GOT_TLSLD16_LO:
7556 expecting_tls_get_addr = 1;
7557 /* Fall thru */
7558
7559 case R_PPC64_GOT_TLSLD16_HI:
7560 case R_PPC64_GOT_TLSLD16_HA:
7561 /* These relocs should never be against a symbol
7562 defined in a shared lib. Leave them alone if
7563 that turns out to be the case. */
7564 if (!is_local)
7565 continue;
7566
7567 /* LD -> LE */
7568 tls_set = 0;
7569 tls_clear = TLS_LD;
7570 tls_type = TLS_TLS | TLS_LD;
7571 break;
7572
7573 case R_PPC64_GOT_TLSGD16:
7574 case R_PPC64_GOT_TLSGD16_LO:
7575 expecting_tls_get_addr = 1;
7576 /* Fall thru */
7577
7578 case R_PPC64_GOT_TLSGD16_HI:
7579 case R_PPC64_GOT_TLSGD16_HA:
7580 if (ok_tprel)
7581 /* GD -> LE */
7582 tls_set = 0;
7583 else
7584 /* GD -> IE */
7585 tls_set = TLS_TLS | TLS_TPRELGD;
7586 tls_clear = TLS_GD;
7587 tls_type = TLS_TLS | TLS_GD;
7588 break;
7589
7590 case R_PPC64_GOT_TPREL16_DS:
7591 case R_PPC64_GOT_TPREL16_LO_DS:
7592 case R_PPC64_GOT_TPREL16_HI:
7593 case R_PPC64_GOT_TPREL16_HA:
7594 if (ok_tprel)
7595 {
7596 /* IE -> LE */
7597 tls_set = 0;
7598 tls_clear = TLS_TPREL;
7599 tls_type = TLS_TLS | TLS_TPREL;
7600 break;
7601 }
7602 continue;
7603
7604 case R_PPC64_TOC16:
7605 case R_PPC64_TOC16_LO:
7606 case R_PPC64_TLS:
7607 case R_PPC64_TLSGD:
7608 case R_PPC64_TLSLD:
7609 if (sym_sec == NULL || sym_sec != toc)
7610 continue;
7611
7612 /* Mark this toc entry as referenced by a TLS
7613 code sequence. We can do that now in the
7614 case of R_PPC64_TLS, and after checking for
7615 tls_get_addr for the TOC16 relocs. */
7616 if (toc_ref == NULL)
7617 {
7618 toc_ref = bfd_zmalloc (toc->size / 8);
7619 if (toc_ref == NULL)
7620 goto err_free_rel;
7621 }
7622 if (h != NULL)
7623 value = h->root.u.def.value;
7624 else
7625 value = sym->st_value;
7626 value += rel->r_addend;
7627 BFD_ASSERT (value < toc->size && value % 8 == 0);
7628 toc_ref_index = value / 8;
7629 if (r_type == R_PPC64_TLS
7630 || r_type == R_PPC64_TLSGD
7631 || r_type == R_PPC64_TLSLD)
7632 {
7633 toc_ref[toc_ref_index] = 1;
7634 continue;
7635 }
7636
7637 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7638 continue;
7639
7640 tls_set = 0;
7641 tls_clear = 0;
7642 expecting_tls_get_addr = 2;
7643 break;
7644
7645 case R_PPC64_TPREL64:
7646 if (pass == 0
7647 || sec != toc
7648 || toc_ref == NULL
7649 || !toc_ref[rel->r_offset / 8])
7650 continue;
7651 if (ok_tprel)
7652 {
7653 /* IE -> LE */
7654 tls_set = TLS_EXPLICIT;
7655 tls_clear = TLS_TPREL;
7656 break;
7657 }
7658 continue;
7659
7660 case R_PPC64_DTPMOD64:
7661 if (pass == 0
7662 || sec != toc
7663 || toc_ref == NULL
7664 || !toc_ref[rel->r_offset / 8])
7665 continue;
7666 if (rel + 1 < relend
7667 && (rel[1].r_info
7668 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7669 && rel[1].r_offset == rel->r_offset + 8)
7670 {
7671 if (ok_tprel)
7672 /* GD -> LE */
7673 tls_set = TLS_EXPLICIT | TLS_GD;
7674 else
7675 /* GD -> IE */
7676 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7677 tls_clear = TLS_GD;
7678 }
7679 else
7680 {
7681 if (!is_local)
7682 continue;
7683
7684 /* LD -> LE */
7685 tls_set = TLS_EXPLICIT;
7686 tls_clear = TLS_LD;
7687 }
7688 break;
7689
7690 default:
7691 continue;
7692 }
7693
7694 if (pass == 0)
7695 {
7696 if (!expecting_tls_get_addr
7697 || !sec->has_tls_get_addr_call)
7698 continue;
7699
7700 if (rel + 1 < relend
7701 && branch_reloc_hash_match (ibfd, rel + 1,
7702 htab->tls_get_addr,
7703 htab->tls_get_addr_fd))
7704 {
7705 if (expecting_tls_get_addr == 2)
7706 {
7707 /* Check for toc tls entries. */
7708 unsigned char *toc_tls;
7709 int retval;
7710
7711 retval = get_tls_mask (&toc_tls, NULL, NULL,
7712 &locsyms,
7713 rel, ibfd);
7714 if (retval == 0)
7715 goto err_free_rel;
7716 if (retval > 1 && toc_tls != NULL)
7717 toc_ref[toc_ref_index] = 1;
7718 }
7719 continue;
7720 }
7721
7722 if (expecting_tls_get_addr != 1)
7723 continue;
7724
7725 /* Uh oh, we didn't find the expected call. We
7726 could just mark this symbol to exclude it
7727 from tls optimization but it's safer to skip
7728 the entire section. */
7729 sec->has_tls_reloc = 0;
7730 break;
7731 }
7732
7733 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7734 {
7735 struct plt_entry *ent;
7736 for (ent = htab->tls_get_addr->elf.plt.plist;
7737 ent != NULL;
7738 ent = ent->next)
7739 if (ent->addend == 0)
7740 {
7741 if (ent->plt.refcount > 0)
7742 {
7743 ent->plt.refcount -= 1;
7744 expecting_tls_get_addr = 0;
7745 }
7746 break;
7747 }
7748 }
7749
7750 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7751 {
7752 struct plt_entry *ent;
7753 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7754 ent != NULL;
7755 ent = ent->next)
7756 if (ent->addend == 0)
7757 {
7758 if (ent->plt.refcount > 0)
7759 ent->plt.refcount -= 1;
7760 break;
7761 }
7762 }
7763
7764 if (tls_clear == 0)
7765 continue;
7766
7767 if ((tls_set & TLS_EXPLICIT) == 0)
7768 {
7769 struct got_entry *ent;
7770
7771 /* Adjust got entry for this reloc. */
7772 if (h != NULL)
7773 ent = h->got.glist;
7774 else
7775 ent = elf_local_got_ents (ibfd)[r_symndx];
7776
7777 for (; ent != NULL; ent = ent->next)
7778 if (ent->addend == rel->r_addend
7779 && ent->owner == ibfd
7780 && ent->tls_type == tls_type)
7781 break;
7782 if (ent == NULL)
7783 abort ();
7784
7785 if (tls_set == 0)
7786 {
7787 /* We managed to get rid of a got entry. */
7788 if (ent->got.refcount > 0)
7789 ent->got.refcount -= 1;
7790 }
7791 }
7792 else
7793 {
7794 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7795 we'll lose one or two dyn relocs. */
7796 if (!dec_dynrel_count (rel->r_info, sec, info,
7797 NULL, h, sym_sec))
7798 return FALSE;
7799
7800 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7801 {
7802 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7803 NULL, h, sym_sec))
7804 return FALSE;
7805 }
7806 }
7807
7808 *tls_mask |= tls_set;
7809 *tls_mask &= ~tls_clear;
7810 }
7811
7812 if (elf_section_data (sec)->relocs != relstart)
7813 free (relstart);
7814 }
7815
7816 if (toc_ref != NULL)
7817 free (toc_ref);
7818
7819 if (locsyms != NULL
7820 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7821 {
7822 if (!info->keep_memory)
7823 free (locsyms);
7824 else
7825 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7826 }
7827 }
7828 return TRUE;
7829 }
7830
7831 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7832 the values of any global symbols in a toc section that has been
7833 edited. Globals in toc sections should be a rarity, so this function
7834 sets a flag if any are found in toc sections other than the one just
7835 edited, so that futher hash table traversals can be avoided. */
7836
7837 struct adjust_toc_info
7838 {
7839 asection *toc;
7840 unsigned long *skip;
7841 bfd_boolean global_toc_syms;
7842 };
7843
7844 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
7845
7846 static bfd_boolean
7847 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7848 {
7849 struct ppc_link_hash_entry *eh;
7850 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7851 unsigned long i;
7852
7853 if (h->root.type == bfd_link_hash_indirect)
7854 return TRUE;
7855
7856 if (h->root.type == bfd_link_hash_warning)
7857 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7858
7859 if (h->root.type != bfd_link_hash_defined
7860 && h->root.type != bfd_link_hash_defweak)
7861 return TRUE;
7862
7863 eh = (struct ppc_link_hash_entry *) h;
7864 if (eh->adjust_done)
7865 return TRUE;
7866
7867 if (eh->elf.root.u.def.section == toc_inf->toc)
7868 {
7869 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
7870 i = toc_inf->toc->rawsize >> 3;
7871 else
7872 i = eh->elf.root.u.def.value >> 3;
7873
7874 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
7875 {
7876 (*_bfd_error_handler)
7877 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
7878 do
7879 ++i;
7880 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
7881 eh->elf.root.u.def.value = (bfd_vma) i << 3;
7882 }
7883
7884 eh->elf.root.u.def.value -= toc_inf->skip[i];
7885 eh->adjust_done = 1;
7886 }
7887 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7888 toc_inf->global_toc_syms = TRUE;
7889
7890 return TRUE;
7891 }
7892
7893 /* Examine all relocs referencing .toc sections in order to remove
7894 unused .toc entries. */
7895
7896 bfd_boolean
7897 ppc64_elf_edit_toc (struct bfd_link_info *info)
7898 {
7899 bfd *ibfd;
7900 struct adjust_toc_info toc_inf;
7901 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7902
7903 htab->do_toc_opt = 1;
7904 toc_inf.global_toc_syms = TRUE;
7905 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7906 {
7907 asection *toc, *sec;
7908 Elf_Internal_Shdr *symtab_hdr;
7909 Elf_Internal_Sym *local_syms;
7910 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
7911 unsigned long *skip, *drop;
7912 unsigned char *used;
7913 unsigned char *keep, last, some_unused;
7914
7915 if (!is_ppc64_elf (ibfd))
7916 continue;
7917
7918 toc = bfd_get_section_by_name (ibfd, ".toc");
7919 if (toc == NULL
7920 || toc->size == 0
7921 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7922 || elf_discarded_section (toc))
7923 continue;
7924
7925 toc_relocs = NULL;
7926 local_syms = NULL;
7927 symtab_hdr = &elf_symtab_hdr (ibfd);
7928
7929 /* Look at sections dropped from the final link. */
7930 skip = NULL;
7931 relstart = NULL;
7932 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7933 {
7934 if (sec->reloc_count == 0
7935 || !elf_discarded_section (sec)
7936 || get_opd_info (sec)
7937 || (sec->flags & SEC_ALLOC) == 0
7938 || (sec->flags & SEC_DEBUGGING) != 0)
7939 continue;
7940
7941 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7942 if (relstart == NULL)
7943 goto error_ret;
7944
7945 /* Run through the relocs to see which toc entries might be
7946 unused. */
7947 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7948 {
7949 enum elf_ppc64_reloc_type r_type;
7950 unsigned long r_symndx;
7951 asection *sym_sec;
7952 struct elf_link_hash_entry *h;
7953 Elf_Internal_Sym *sym;
7954 bfd_vma val;
7955
7956 r_type = ELF64_R_TYPE (rel->r_info);
7957 switch (r_type)
7958 {
7959 default:
7960 continue;
7961
7962 case R_PPC64_TOC16:
7963 case R_PPC64_TOC16_LO:
7964 case R_PPC64_TOC16_HI:
7965 case R_PPC64_TOC16_HA:
7966 case R_PPC64_TOC16_DS:
7967 case R_PPC64_TOC16_LO_DS:
7968 break;
7969 }
7970
7971 r_symndx = ELF64_R_SYM (rel->r_info);
7972 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7973 r_symndx, ibfd))
7974 goto error_ret;
7975
7976 if (sym_sec != toc)
7977 continue;
7978
7979 if (h != NULL)
7980 val = h->root.u.def.value;
7981 else
7982 val = sym->st_value;
7983 val += rel->r_addend;
7984
7985 if (val >= toc->size)
7986 continue;
7987
7988 /* Anything in the toc ought to be aligned to 8 bytes.
7989 If not, don't mark as unused. */
7990 if (val & 7)
7991 continue;
7992
7993 if (skip == NULL)
7994 {
7995 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
7996 if (skip == NULL)
7997 goto error_ret;
7998 }
7999
8000 skip[val >> 3] = ref_from_discarded;
8001 }
8002
8003 if (elf_section_data (sec)->relocs != relstart)
8004 free (relstart);
8005 }
8006
8007 /* For largetoc loads of address constants, we can convert
8008 . addis rx,2,addr@got@ha
8009 . ld ry,addr@got@l(rx)
8010 to
8011 . addis rx,2,addr@toc@ha
8012 . addi ry,rx,addr@toc@l
8013 when addr is within 2G of the toc pointer. This then means
8014 that the word storing "addr" in the toc is no longer needed. */
8015
8016 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8017 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8018 && toc->reloc_count != 0)
8019 {
8020 /* Read toc relocs. */
8021 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8022 info->keep_memory);
8023 if (toc_relocs == NULL)
8024 goto error_ret;
8025
8026 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8027 {
8028 enum elf_ppc64_reloc_type r_type;
8029 unsigned long r_symndx;
8030 asection *sym_sec;
8031 struct elf_link_hash_entry *h;
8032 Elf_Internal_Sym *sym;
8033 bfd_vma val, addr;
8034
8035 r_type = ELF64_R_TYPE (rel->r_info);
8036 if (r_type != R_PPC64_ADDR64)
8037 continue;
8038
8039 r_symndx = ELF64_R_SYM (rel->r_info);
8040 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8041 r_symndx, ibfd))
8042 goto error_ret;
8043
8044 if (sym_sec == NULL
8045 || elf_discarded_section (sym_sec))
8046 continue;
8047
8048 if (!SYMBOL_CALLS_LOCAL (info, h))
8049 continue;
8050
8051 if (h != NULL)
8052 {
8053 if (h->type == STT_GNU_IFUNC)
8054 continue;
8055 val = h->root.u.def.value;
8056 }
8057 else
8058 {
8059 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8060 continue;
8061 val = sym->st_value;
8062 }
8063 val += rel->r_addend;
8064 val += sym_sec->output_section->vma + sym_sec->output_offset;
8065
8066 /* We don't yet know the exact toc pointer value, but we
8067 know it will be somewhere in the toc section. Don't
8068 optimize if the difference from any possible toc
8069 pointer is outside [ff..f80008000, 7fff7fff]. */
8070 addr = toc->output_section->vma + TOC_BASE_OFF;
8071 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8072 continue;
8073
8074 addr = toc->output_section->vma + toc->output_section->rawsize;
8075 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8076 continue;
8077
8078 if (skip == NULL)
8079 {
8080 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8081 if (skip == NULL)
8082 goto error_ret;
8083 }
8084
8085 skip[rel->r_offset >> 3]
8086 |= can_optimize | ((rel - toc_relocs) << 2);
8087 }
8088 }
8089
8090 if (skip == NULL)
8091 continue;
8092
8093 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8094 if (used == NULL)
8095 {
8096 error_ret:
8097 if (local_syms != NULL
8098 && symtab_hdr->contents != (unsigned char *) local_syms)
8099 free (local_syms);
8100 if (sec != NULL
8101 && relstart != NULL
8102 && elf_section_data (sec)->relocs != relstart)
8103 free (relstart);
8104 if (toc_relocs != NULL
8105 && elf_section_data (toc)->relocs != toc_relocs)
8106 free (toc_relocs);
8107 if (skip != NULL)
8108 free (skip);
8109 return FALSE;
8110 }
8111
8112 /* Now check all kept sections that might reference the toc.
8113 Check the toc itself last. */
8114 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8115 : ibfd->sections);
8116 sec != NULL;
8117 sec = (sec == toc ? NULL
8118 : sec->next == NULL ? toc
8119 : sec->next == toc && toc->next ? toc->next
8120 : sec->next))
8121 {
8122 int repeat;
8123
8124 if (sec->reloc_count == 0
8125 || elf_discarded_section (sec)
8126 || get_opd_info (sec)
8127 || (sec->flags & SEC_ALLOC) == 0
8128 || (sec->flags & SEC_DEBUGGING) != 0)
8129 continue;
8130
8131 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8132 info->keep_memory);
8133 if (relstart == NULL)
8134 goto error_ret;
8135
8136 /* Mark toc entries referenced as used. */
8137 repeat = 0;
8138 do
8139 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8140 {
8141 enum elf_ppc64_reloc_type r_type;
8142 unsigned long r_symndx;
8143 asection *sym_sec;
8144 struct elf_link_hash_entry *h;
8145 Elf_Internal_Sym *sym;
8146 bfd_vma val;
8147
8148 r_type = ELF64_R_TYPE (rel->r_info);
8149 switch (r_type)
8150 {
8151 case R_PPC64_TOC16:
8152 case R_PPC64_TOC16_LO:
8153 case R_PPC64_TOC16_HI:
8154 case R_PPC64_TOC16_HA:
8155 case R_PPC64_TOC16_DS:
8156 case R_PPC64_TOC16_LO_DS:
8157 /* In case we're taking addresses of toc entries. */
8158 case R_PPC64_ADDR64:
8159 break;
8160
8161 default:
8162 continue;
8163 }
8164
8165 r_symndx = ELF64_R_SYM (rel->r_info);
8166 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8167 r_symndx, ibfd))
8168 {
8169 free (used);
8170 goto error_ret;
8171 }
8172
8173 if (sym_sec != toc)
8174 continue;
8175
8176 if (h != NULL)
8177 val = h->root.u.def.value;
8178 else
8179 val = sym->st_value;
8180 val += rel->r_addend;
8181
8182 if (val >= toc->size)
8183 continue;
8184
8185 if ((skip[val >> 3] & can_optimize) != 0)
8186 {
8187 bfd_vma off;
8188 unsigned char opc;
8189
8190 switch (r_type)
8191 {
8192 case R_PPC64_TOC16_HA:
8193 break;
8194
8195 case R_PPC64_TOC16_LO_DS:
8196 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8197 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8198 return FALSE;
8199 if ((opc & (0x3f << 2)) == (58u << 2))
8200 break;
8201 /* Fall thru */
8202
8203 default:
8204 /* Wrong sort of reloc, or not a ld. We may
8205 as well clear ref_from_discarded too. */
8206 skip[val >> 3] = 0;
8207 }
8208 }
8209
8210 /* For the toc section, we only mark as used if
8211 this entry itself isn't unused. */
8212 if (sec == toc
8213 && !used[val >> 3]
8214 && (used[rel->r_offset >> 3]
8215 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8216 /* Do all the relocs again, to catch reference
8217 chains. */
8218 repeat = 1;
8219
8220 used[val >> 3] = 1;
8221 }
8222 while (repeat);
8223
8224 if (elf_section_data (sec)->relocs != relstart)
8225 free (relstart);
8226 }
8227
8228 /* Merge the used and skip arrays. Assume that TOC
8229 doublewords not appearing as either used or unused belong
8230 to to an entry more than one doubleword in size. */
8231 for (drop = skip, keep = used, last = 0, some_unused = 0;
8232 drop < skip + (toc->size + 7) / 8;
8233 ++drop, ++keep)
8234 {
8235 if (*keep)
8236 {
8237 *drop &= ~ref_from_discarded;
8238 if ((*drop & can_optimize) != 0)
8239 some_unused = 1;
8240 last = 0;
8241 }
8242 else if (*drop)
8243 {
8244 some_unused = 1;
8245 last = ref_from_discarded;
8246 }
8247 else
8248 *drop = last;
8249 }
8250
8251 free (used);
8252
8253 if (some_unused)
8254 {
8255 bfd_byte *contents, *src;
8256 unsigned long off;
8257 Elf_Internal_Sym *sym;
8258 bfd_boolean local_toc_syms = FALSE;
8259
8260 /* Shuffle the toc contents, and at the same time convert the
8261 skip array from booleans into offsets. */
8262 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8263 goto error_ret;
8264
8265 elf_section_data (toc)->this_hdr.contents = contents;
8266
8267 for (src = contents, off = 0, drop = skip;
8268 src < contents + toc->size;
8269 src += 8, ++drop)
8270 {
8271 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8272 off += 8;
8273 else if (off != 0)
8274 {
8275 *drop = off;
8276 memcpy (src - off, src, 8);
8277 }
8278 }
8279 *drop = off;
8280 toc->rawsize = toc->size;
8281 toc->size = src - contents - off;
8282
8283 /* Adjust addends for relocs against the toc section sym,
8284 and optimize any accesses we can. */
8285 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8286 {
8287 if (sec->reloc_count == 0
8288 || elf_discarded_section (sec))
8289 continue;
8290
8291 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8292 info->keep_memory);
8293 if (relstart == NULL)
8294 goto error_ret;
8295
8296 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8297 {
8298 enum elf_ppc64_reloc_type r_type;
8299 unsigned long r_symndx;
8300 asection *sym_sec;
8301 struct elf_link_hash_entry *h;
8302 bfd_vma val;
8303
8304 r_type = ELF64_R_TYPE (rel->r_info);
8305 switch (r_type)
8306 {
8307 default:
8308 continue;
8309
8310 case R_PPC64_TOC16:
8311 case R_PPC64_TOC16_LO:
8312 case R_PPC64_TOC16_HI:
8313 case R_PPC64_TOC16_HA:
8314 case R_PPC64_TOC16_DS:
8315 case R_PPC64_TOC16_LO_DS:
8316 case R_PPC64_ADDR64:
8317 break;
8318 }
8319
8320 r_symndx = ELF64_R_SYM (rel->r_info);
8321 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8322 r_symndx, ibfd))
8323 goto error_ret;
8324
8325 if (sym_sec != toc)
8326 continue;
8327
8328 if (h != NULL)
8329 val = h->root.u.def.value;
8330 else
8331 {
8332 val = sym->st_value;
8333 if (val != 0)
8334 local_toc_syms = TRUE;
8335 }
8336
8337 val += rel->r_addend;
8338
8339 if (val > toc->rawsize)
8340 val = toc->rawsize;
8341 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8342 continue;
8343 else if ((skip[val >> 3] & can_optimize) != 0)
8344 {
8345 Elf_Internal_Rela *tocrel
8346 = toc_relocs + (skip[val >> 3] >> 2);
8347 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8348
8349 switch (r_type)
8350 {
8351 case R_PPC64_TOC16_HA:
8352 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8353 break;
8354
8355 case R_PPC64_TOC16_LO_DS:
8356 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8357 break;
8358
8359 default:
8360 abort ();
8361 }
8362 rel->r_addend = tocrel->r_addend;
8363 elf_section_data (sec)->relocs = relstart;
8364 continue;
8365 }
8366
8367 if (h != NULL || sym->st_value != 0)
8368 continue;
8369
8370 rel->r_addend -= skip[val >> 3];
8371 elf_section_data (sec)->relocs = relstart;
8372 }
8373
8374 if (elf_section_data (sec)->relocs != relstart)
8375 free (relstart);
8376 }
8377
8378 /* We shouldn't have local or global symbols defined in the TOC,
8379 but handle them anyway. */
8380 if (local_syms != NULL)
8381 for (sym = local_syms;
8382 sym < local_syms + symtab_hdr->sh_info;
8383 ++sym)
8384 if (sym->st_value != 0
8385 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8386 {
8387 unsigned long i;
8388
8389 if (sym->st_value > toc->rawsize)
8390 i = toc->rawsize >> 3;
8391 else
8392 i = sym->st_value >> 3;
8393
8394 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8395 {
8396 if (local_toc_syms)
8397 (*_bfd_error_handler)
8398 (_("%s defined on removed toc entry"),
8399 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8400 do
8401 ++i;
8402 while ((skip[i] & (ref_from_discarded | can_optimize)));
8403 sym->st_value = (bfd_vma) i << 3;
8404 }
8405
8406 sym->st_value -= skip[i];
8407 symtab_hdr->contents = (unsigned char *) local_syms;
8408 }
8409
8410 /* Adjust any global syms defined in this toc input section. */
8411 if (toc_inf.global_toc_syms)
8412 {
8413 toc_inf.toc = toc;
8414 toc_inf.skip = skip;
8415 toc_inf.global_toc_syms = FALSE;
8416 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8417 &toc_inf);
8418 }
8419
8420 if (toc->reloc_count != 0)
8421 {
8422 Elf_Internal_Shdr *rel_hdr;
8423 Elf_Internal_Rela *wrel;
8424 bfd_size_type sz;
8425
8426 /* Remove unused toc relocs, and adjust those we keep. */
8427 wrel = toc_relocs;
8428 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8429 if ((skip[rel->r_offset >> 3]
8430 & (ref_from_discarded | can_optimize)) == 0)
8431 {
8432 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8433 wrel->r_info = rel->r_info;
8434 wrel->r_addend = rel->r_addend;
8435 ++wrel;
8436 }
8437 else if (!dec_dynrel_count (rel->r_info, toc, info,
8438 &local_syms, NULL, NULL))
8439 goto error_ret;
8440
8441 elf_section_data (toc)->relocs = toc_relocs;
8442 toc->reloc_count = wrel - toc_relocs;
8443 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8444 sz = rel_hdr->sh_entsize;
8445 rel_hdr->sh_size = toc->reloc_count * sz;
8446 }
8447 }
8448 else if (elf_section_data (toc)->relocs != toc_relocs)
8449 free (toc_relocs);
8450
8451 if (local_syms != NULL
8452 && symtab_hdr->contents != (unsigned char *) local_syms)
8453 {
8454 if (!info->keep_memory)
8455 free (local_syms);
8456 else
8457 symtab_hdr->contents = (unsigned char *) local_syms;
8458 }
8459 free (skip);
8460 }
8461
8462 return TRUE;
8463 }
8464
8465 /* Return true iff input section I references the TOC using
8466 instructions limited to +/-32k offsets. */
8467
8468 bfd_boolean
8469 ppc64_elf_has_small_toc_reloc (asection *i)
8470 {
8471 return (is_ppc64_elf (i->owner)
8472 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8473 }
8474
8475 /* Allocate space for one GOT entry. */
8476
8477 static void
8478 allocate_got (struct elf_link_hash_entry *h,
8479 struct bfd_link_info *info,
8480 struct got_entry *gent)
8481 {
8482 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8483 bfd_boolean dyn;
8484 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8485 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8486 ? 16 : 8);
8487 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8488 ? 2 : 1) * sizeof (Elf64_External_Rela);
8489 asection *got = ppc64_elf_tdata (gent->owner)->got;
8490
8491 gent->got.offset = got->size;
8492 got->size += entsize;
8493
8494 dyn = htab->elf.dynamic_sections_created;
8495 if ((info->shared
8496 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8497 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8498 || h->root.type != bfd_link_hash_undefweak))
8499 {
8500 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8501 relgot->size += rentsize;
8502 }
8503 else if (h->type == STT_GNU_IFUNC)
8504 {
8505 asection *relgot = htab->reliplt;
8506 relgot->size += rentsize;
8507 htab->got_reli_size += rentsize;
8508 }
8509 }
8510
8511 /* This function merges got entries in the same toc group. */
8512
8513 static void
8514 merge_got_entries (struct got_entry **pent)
8515 {
8516 struct got_entry *ent, *ent2;
8517
8518 for (ent = *pent; ent != NULL; ent = ent->next)
8519 if (!ent->is_indirect)
8520 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8521 if (!ent2->is_indirect
8522 && ent2->addend == ent->addend
8523 && ent2->tls_type == ent->tls_type
8524 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8525 {
8526 ent2->is_indirect = TRUE;
8527 ent2->got.ent = ent;
8528 }
8529 }
8530
8531 /* Allocate space in .plt, .got and associated reloc sections for
8532 dynamic relocs. */
8533
8534 static bfd_boolean
8535 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8536 {
8537 struct bfd_link_info *info;
8538 struct ppc_link_hash_table *htab;
8539 asection *s;
8540 struct ppc_link_hash_entry *eh;
8541 struct ppc_dyn_relocs *p;
8542 struct got_entry **pgent, *gent;
8543
8544 if (h->root.type == bfd_link_hash_indirect)
8545 return TRUE;
8546
8547 if (h->root.type == bfd_link_hash_warning)
8548 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8549
8550 info = (struct bfd_link_info *) inf;
8551 htab = ppc_hash_table (info);
8552 if (htab == NULL)
8553 return FALSE;
8554
8555 if ((htab->elf.dynamic_sections_created
8556 && h->dynindx != -1
8557 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8558 || h->type == STT_GNU_IFUNC)
8559 {
8560 struct plt_entry *pent;
8561 bfd_boolean doneone = FALSE;
8562 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8563 if (pent->plt.refcount > 0)
8564 {
8565 if (!htab->elf.dynamic_sections_created
8566 || h->dynindx == -1)
8567 {
8568 s = htab->iplt;
8569 pent->plt.offset = s->size;
8570 s->size += PLT_ENTRY_SIZE;
8571 s = htab->reliplt;
8572 }
8573 else
8574 {
8575 /* If this is the first .plt entry, make room for the special
8576 first entry. */
8577 s = htab->plt;
8578 if (s->size == 0)
8579 s->size += PLT_INITIAL_ENTRY_SIZE;
8580
8581 pent->plt.offset = s->size;
8582
8583 /* Make room for this entry. */
8584 s->size += PLT_ENTRY_SIZE;
8585
8586 /* Make room for the .glink code. */
8587 s = htab->glink;
8588 if (s->size == 0)
8589 s->size += GLINK_CALL_STUB_SIZE;
8590 /* We need bigger stubs past index 32767. */
8591 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8592 s->size += 4;
8593 s->size += 2*4;
8594
8595 /* We also need to make an entry in the .rela.plt section. */
8596 s = htab->relplt;
8597 }
8598 s->size += sizeof (Elf64_External_Rela);
8599 doneone = TRUE;
8600 }
8601 else
8602 pent->plt.offset = (bfd_vma) -1;
8603 if (!doneone)
8604 {
8605 h->plt.plist = NULL;
8606 h->needs_plt = 0;
8607 }
8608 }
8609 else
8610 {
8611 h->plt.plist = NULL;
8612 h->needs_plt = 0;
8613 }
8614
8615 eh = (struct ppc_link_hash_entry *) h;
8616 /* Run through the TLS GD got entries first if we're changing them
8617 to TPREL. */
8618 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8619 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8620 if (gent->got.refcount > 0
8621 && (gent->tls_type & TLS_GD) != 0)
8622 {
8623 /* This was a GD entry that has been converted to TPREL. If
8624 there happens to be a TPREL entry we can use that one. */
8625 struct got_entry *ent;
8626 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8627 if (ent->got.refcount > 0
8628 && (ent->tls_type & TLS_TPREL) != 0
8629 && ent->addend == gent->addend
8630 && ent->owner == gent->owner)
8631 {
8632 gent->got.refcount = 0;
8633 break;
8634 }
8635
8636 /* If not, then we'll be using our own TPREL entry. */
8637 if (gent->got.refcount != 0)
8638 gent->tls_type = TLS_TLS | TLS_TPREL;
8639 }
8640
8641 /* Remove any list entry that won't generate a word in the GOT before
8642 we call merge_got_entries. Otherwise we risk merging to empty
8643 entries. */
8644 pgent = &h->got.glist;
8645 while ((gent = *pgent) != NULL)
8646 if (gent->got.refcount > 0)
8647 {
8648 if ((gent->tls_type & TLS_LD) != 0
8649 && !h->def_dynamic)
8650 {
8651 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8652 *pgent = gent->next;
8653 }
8654 else
8655 pgent = &gent->next;
8656 }
8657 else
8658 *pgent = gent->next;
8659
8660 if (!htab->do_multi_toc)
8661 merge_got_entries (&h->got.glist);
8662
8663 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8664 if (!gent->is_indirect)
8665 {
8666 /* Make sure this symbol is output as a dynamic symbol.
8667 Undefined weak syms won't yet be marked as dynamic,
8668 nor will all TLS symbols. */
8669 if (h->dynindx == -1
8670 && !h->forced_local
8671 && h->type != STT_GNU_IFUNC
8672 && htab->elf.dynamic_sections_created)
8673 {
8674 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8675 return FALSE;
8676 }
8677
8678 if (!is_ppc64_elf (gent->owner))
8679 abort ();
8680
8681 allocate_got (h, info, gent);
8682 }
8683
8684 if (eh->dyn_relocs == NULL
8685 || (!htab->elf.dynamic_sections_created
8686 && h->type != STT_GNU_IFUNC))
8687 return TRUE;
8688
8689 /* In the shared -Bsymbolic case, discard space allocated for
8690 dynamic pc-relative relocs against symbols which turn out to be
8691 defined in regular objects. For the normal shared case, discard
8692 space for relocs that have become local due to symbol visibility
8693 changes. */
8694
8695 if (info->shared)
8696 {
8697 /* Relocs that use pc_count are those that appear on a call insn,
8698 or certain REL relocs (see must_be_dyn_reloc) that can be
8699 generated via assembly. We want calls to protected symbols to
8700 resolve directly to the function rather than going via the plt.
8701 If people want function pointer comparisons to work as expected
8702 then they should avoid writing weird assembly. */
8703 if (SYMBOL_CALLS_LOCAL (info, h))
8704 {
8705 struct ppc_dyn_relocs **pp;
8706
8707 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8708 {
8709 p->count -= p->pc_count;
8710 p->pc_count = 0;
8711 if (p->count == 0)
8712 *pp = p->next;
8713 else
8714 pp = &p->next;
8715 }
8716 }
8717
8718 /* Also discard relocs on undefined weak syms with non-default
8719 visibility. */
8720 if (eh->dyn_relocs != NULL
8721 && h->root.type == bfd_link_hash_undefweak)
8722 {
8723 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8724 eh->dyn_relocs = NULL;
8725
8726 /* Make sure this symbol is output as a dynamic symbol.
8727 Undefined weak syms won't yet be marked as dynamic. */
8728 else if (h->dynindx == -1
8729 && !h->forced_local)
8730 {
8731 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8732 return FALSE;
8733 }
8734 }
8735 }
8736 else if (h->type == STT_GNU_IFUNC)
8737 {
8738 if (!h->non_got_ref)
8739 eh->dyn_relocs = NULL;
8740 }
8741 else if (ELIMINATE_COPY_RELOCS)
8742 {
8743 /* For the non-shared case, discard space for relocs against
8744 symbols which turn out to need copy relocs or are not
8745 dynamic. */
8746
8747 if (!h->non_got_ref
8748 && !h->def_regular)
8749 {
8750 /* Make sure this symbol is output as a dynamic symbol.
8751 Undefined weak syms won't yet be marked as dynamic. */
8752 if (h->dynindx == -1
8753 && !h->forced_local)
8754 {
8755 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8756 return FALSE;
8757 }
8758
8759 /* If that succeeded, we know we'll be keeping all the
8760 relocs. */
8761 if (h->dynindx != -1)
8762 goto keep;
8763 }
8764
8765 eh->dyn_relocs = NULL;
8766
8767 keep: ;
8768 }
8769
8770 /* Finally, allocate space. */
8771 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8772 {
8773 asection *sreloc = elf_section_data (p->sec)->sreloc;
8774 if (!htab->elf.dynamic_sections_created)
8775 sreloc = htab->reliplt;
8776 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8777 }
8778
8779 return TRUE;
8780 }
8781
8782 /* Find any dynamic relocs that apply to read-only sections. */
8783
8784 static bfd_boolean
8785 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8786 {
8787 struct ppc_link_hash_entry *eh;
8788 struct ppc_dyn_relocs *p;
8789
8790 if (h->root.type == bfd_link_hash_warning)
8791 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8792
8793 eh = (struct ppc_link_hash_entry *) h;
8794 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8795 {
8796 asection *s = p->sec->output_section;
8797
8798 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8799 {
8800 struct bfd_link_info *info = inf;
8801
8802 info->flags |= DF_TEXTREL;
8803
8804 /* Not an error, just cut short the traversal. */
8805 return FALSE;
8806 }
8807 }
8808 return TRUE;
8809 }
8810
8811 /* Set the sizes of the dynamic sections. */
8812
8813 static bfd_boolean
8814 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8815 struct bfd_link_info *info)
8816 {
8817 struct ppc_link_hash_table *htab;
8818 bfd *dynobj;
8819 asection *s;
8820 bfd_boolean relocs;
8821 bfd *ibfd;
8822 struct got_entry *first_tlsld;
8823
8824 htab = ppc_hash_table (info);
8825 if (htab == NULL)
8826 return FALSE;
8827
8828 dynobj = htab->elf.dynobj;
8829 if (dynobj == NULL)
8830 abort ();
8831
8832 if (htab->elf.dynamic_sections_created)
8833 {
8834 /* Set the contents of the .interp section to the interpreter. */
8835 if (info->executable)
8836 {
8837 s = bfd_get_section_by_name (dynobj, ".interp");
8838 if (s == NULL)
8839 abort ();
8840 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8841 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8842 }
8843 }
8844
8845 /* Set up .got offsets for local syms, and space for local dynamic
8846 relocs. */
8847 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8848 {
8849 struct got_entry **lgot_ents;
8850 struct got_entry **end_lgot_ents;
8851 struct plt_entry **local_plt;
8852 struct plt_entry **end_local_plt;
8853 unsigned char *lgot_masks;
8854 bfd_size_type locsymcount;
8855 Elf_Internal_Shdr *symtab_hdr;
8856 asection *srel;
8857
8858 if (!is_ppc64_elf (ibfd))
8859 continue;
8860
8861 for (s = ibfd->sections; s != NULL; s = s->next)
8862 {
8863 struct ppc_dyn_relocs *p;
8864
8865 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8866 {
8867 if (!bfd_is_abs_section (p->sec)
8868 && bfd_is_abs_section (p->sec->output_section))
8869 {
8870 /* Input section has been discarded, either because
8871 it is a copy of a linkonce section or due to
8872 linker script /DISCARD/, so we'll be discarding
8873 the relocs too. */
8874 }
8875 else if (p->count != 0)
8876 {
8877 srel = elf_section_data (p->sec)->sreloc;
8878 if (!htab->elf.dynamic_sections_created)
8879 srel = htab->reliplt;
8880 srel->size += p->count * sizeof (Elf64_External_Rela);
8881 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8882 info->flags |= DF_TEXTREL;
8883 }
8884 }
8885 }
8886
8887 lgot_ents = elf_local_got_ents (ibfd);
8888 if (!lgot_ents)
8889 continue;
8890
8891 symtab_hdr = &elf_symtab_hdr (ibfd);
8892 locsymcount = symtab_hdr->sh_info;
8893 end_lgot_ents = lgot_ents + locsymcount;
8894 local_plt = (struct plt_entry **) end_lgot_ents;
8895 end_local_plt = local_plt + locsymcount;
8896 lgot_masks = (unsigned char *) end_local_plt;
8897 s = ppc64_elf_tdata (ibfd)->got;
8898 srel = ppc64_elf_tdata (ibfd)->relgot;
8899 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8900 {
8901 struct got_entry **pent, *ent;
8902
8903 pent = lgot_ents;
8904 while ((ent = *pent) != NULL)
8905 if (ent->got.refcount > 0)
8906 {
8907 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8908 {
8909 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8910 *pent = ent->next;
8911 }
8912 else
8913 {
8914 unsigned int num = 1;
8915 ent->got.offset = s->size;
8916 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8917 num = 2;
8918 s->size += num * 8;
8919 if (info->shared)
8920 srel->size += num * sizeof (Elf64_External_Rela);
8921 else if ((*lgot_masks & PLT_IFUNC) != 0)
8922 {
8923 htab->reliplt->size
8924 += num * sizeof (Elf64_External_Rela);
8925 htab->got_reli_size
8926 += num * sizeof (Elf64_External_Rela);
8927 }
8928 pent = &ent->next;
8929 }
8930 }
8931 else
8932 *pent = ent->next;
8933 }
8934
8935 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8936 for (; local_plt < end_local_plt; ++local_plt)
8937 {
8938 struct plt_entry *ent;
8939
8940 for (ent = *local_plt; ent != NULL; ent = ent->next)
8941 if (ent->plt.refcount > 0)
8942 {
8943 s = htab->iplt;
8944 ent->plt.offset = s->size;
8945 s->size += PLT_ENTRY_SIZE;
8946
8947 htab->reliplt->size += sizeof (Elf64_External_Rela);
8948 }
8949 else
8950 ent->plt.offset = (bfd_vma) -1;
8951 }
8952 }
8953
8954 /* Allocate global sym .plt and .got entries, and space for global
8955 sym dynamic relocs. */
8956 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8957
8958 first_tlsld = NULL;
8959 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8960 {
8961 struct got_entry *ent;
8962
8963 if (!is_ppc64_elf (ibfd))
8964 continue;
8965
8966 ent = ppc64_tlsld_got (ibfd);
8967 if (ent->got.refcount > 0)
8968 {
8969 if (!htab->do_multi_toc && first_tlsld != NULL)
8970 {
8971 ent->is_indirect = TRUE;
8972 ent->got.ent = first_tlsld;
8973 }
8974 else
8975 {
8976 if (first_tlsld == NULL)
8977 first_tlsld = ent;
8978 s = ppc64_elf_tdata (ibfd)->got;
8979 ent->got.offset = s->size;
8980 ent->owner = ibfd;
8981 s->size += 16;
8982 if (info->shared)
8983 {
8984 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8985 srel->size += sizeof (Elf64_External_Rela);
8986 }
8987 }
8988 }
8989 else
8990 ent->got.offset = (bfd_vma) -1;
8991 }
8992
8993 /* We now have determined the sizes of the various dynamic sections.
8994 Allocate memory for them. */
8995 relocs = FALSE;
8996 for (s = dynobj->sections; s != NULL; s = s->next)
8997 {
8998 if ((s->flags & SEC_LINKER_CREATED) == 0)
8999 continue;
9000
9001 if (s == htab->brlt || s == htab->relbrlt)
9002 /* These haven't been allocated yet; don't strip. */
9003 continue;
9004 else if (s == htab->got
9005 || s == htab->plt
9006 || s == htab->iplt
9007 || s == htab->glink
9008 || s == htab->dynbss)
9009 {
9010 /* Strip this section if we don't need it; see the
9011 comment below. */
9012 }
9013 else if (CONST_STRNEQ (s->name, ".rela"))
9014 {
9015 if (s->size != 0)
9016 {
9017 if (s != htab->relplt)
9018 relocs = TRUE;
9019
9020 /* We use the reloc_count field as a counter if we need
9021 to copy relocs into the output file. */
9022 s->reloc_count = 0;
9023 }
9024 }
9025 else
9026 {
9027 /* It's not one of our sections, so don't allocate space. */
9028 continue;
9029 }
9030
9031 if (s->size == 0)
9032 {
9033 /* If we don't need this section, strip it from the
9034 output file. This is mostly to handle .rela.bss and
9035 .rela.plt. We must create both sections in
9036 create_dynamic_sections, because they must be created
9037 before the linker maps input sections to output
9038 sections. The linker does that before
9039 adjust_dynamic_symbol is called, and it is that
9040 function which decides whether anything needs to go
9041 into these sections. */
9042 s->flags |= SEC_EXCLUDE;
9043 continue;
9044 }
9045
9046 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9047 continue;
9048
9049 /* Allocate memory for the section contents. We use bfd_zalloc
9050 here in case unused entries are not reclaimed before the
9051 section's contents are written out. This should not happen,
9052 but this way if it does we get a R_PPC64_NONE reloc in .rela
9053 sections instead of garbage.
9054 We also rely on the section contents being zero when writing
9055 the GOT. */
9056 s->contents = bfd_zalloc (dynobj, s->size);
9057 if (s->contents == NULL)
9058 return FALSE;
9059 }
9060
9061 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9062 {
9063 if (!is_ppc64_elf (ibfd))
9064 continue;
9065
9066 s = ppc64_elf_tdata (ibfd)->got;
9067 if (s != NULL && s != htab->got)
9068 {
9069 if (s->size == 0)
9070 s->flags |= SEC_EXCLUDE;
9071 else
9072 {
9073 s->contents = bfd_zalloc (ibfd, s->size);
9074 if (s->contents == NULL)
9075 return FALSE;
9076 }
9077 }
9078 s = ppc64_elf_tdata (ibfd)->relgot;
9079 if (s != NULL)
9080 {
9081 if (s->size == 0)
9082 s->flags |= SEC_EXCLUDE;
9083 else
9084 {
9085 s->contents = bfd_zalloc (ibfd, s->size);
9086 if (s->contents == NULL)
9087 return FALSE;
9088 relocs = TRUE;
9089 s->reloc_count = 0;
9090 }
9091 }
9092 }
9093
9094 if (htab->elf.dynamic_sections_created)
9095 {
9096 /* Add some entries to the .dynamic section. We fill in the
9097 values later, in ppc64_elf_finish_dynamic_sections, but we
9098 must add the entries now so that we get the correct size for
9099 the .dynamic section. The DT_DEBUG entry is filled in by the
9100 dynamic linker and used by the debugger. */
9101 #define add_dynamic_entry(TAG, VAL) \
9102 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9103
9104 if (info->executable)
9105 {
9106 if (!add_dynamic_entry (DT_DEBUG, 0))
9107 return FALSE;
9108 }
9109
9110 if (htab->plt != NULL && htab->plt->size != 0)
9111 {
9112 if (!add_dynamic_entry (DT_PLTGOT, 0)
9113 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9114 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9115 || !add_dynamic_entry (DT_JMPREL, 0)
9116 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9117 return FALSE;
9118 }
9119
9120 if (NO_OPD_RELOCS)
9121 {
9122 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9123 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9124 return FALSE;
9125 }
9126
9127 if (!htab->no_tls_get_addr_opt
9128 && htab->tls_get_addr_fd != NULL
9129 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9130 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9131 return FALSE;
9132
9133 if (relocs)
9134 {
9135 if (!add_dynamic_entry (DT_RELA, 0)
9136 || !add_dynamic_entry (DT_RELASZ, 0)
9137 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9138 return FALSE;
9139
9140 /* If any dynamic relocs apply to a read-only section,
9141 then we need a DT_TEXTREL entry. */
9142 if ((info->flags & DF_TEXTREL) == 0)
9143 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9144
9145 if ((info->flags & DF_TEXTREL) != 0)
9146 {
9147 if (!add_dynamic_entry (DT_TEXTREL, 0))
9148 return FALSE;
9149 }
9150 }
9151 }
9152 #undef add_dynamic_entry
9153
9154 return TRUE;
9155 }
9156
9157 /* Determine the type of stub needed, if any, for a call. */
9158
9159 static inline enum ppc_stub_type
9160 ppc_type_of_stub (asection *input_sec,
9161 const Elf_Internal_Rela *rel,
9162 struct ppc_link_hash_entry **hash,
9163 struct plt_entry **plt_ent,
9164 bfd_vma destination)
9165 {
9166 struct ppc_link_hash_entry *h = *hash;
9167 bfd_vma location;
9168 bfd_vma branch_offset;
9169 bfd_vma max_branch_offset;
9170 enum elf_ppc64_reloc_type r_type;
9171
9172 if (h != NULL)
9173 {
9174 struct plt_entry *ent;
9175 struct ppc_link_hash_entry *fdh = h;
9176 if (h->oh != NULL
9177 && h->oh->is_func_descriptor)
9178 {
9179 fdh = ppc_follow_link (h->oh);
9180 *hash = fdh;
9181 }
9182
9183 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9184 if (ent->addend == rel->r_addend
9185 && ent->plt.offset != (bfd_vma) -1)
9186 {
9187 *plt_ent = ent;
9188 return ppc_stub_plt_call;
9189 }
9190
9191 /* Here, we know we don't have a plt entry. If we don't have a
9192 either a defined function descriptor or a defined entry symbol
9193 in a regular object file, then it is pointless trying to make
9194 any other type of stub. */
9195 if (!is_static_defined (&fdh->elf)
9196 && !is_static_defined (&h->elf))
9197 return ppc_stub_none;
9198 }
9199 else if (elf_local_got_ents (input_sec->owner) != NULL)
9200 {
9201 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9202 struct plt_entry **local_plt = (struct plt_entry **)
9203 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9204 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9205
9206 if (local_plt[r_symndx] != NULL)
9207 {
9208 struct plt_entry *ent;
9209
9210 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9211 if (ent->addend == rel->r_addend
9212 && ent->plt.offset != (bfd_vma) -1)
9213 {
9214 *plt_ent = ent;
9215 return ppc_stub_plt_call;
9216 }
9217 }
9218 }
9219
9220 /* Determine where the call point is. */
9221 location = (input_sec->output_offset
9222 + input_sec->output_section->vma
9223 + rel->r_offset);
9224
9225 branch_offset = destination - location;
9226 r_type = ELF64_R_TYPE (rel->r_info);
9227
9228 /* Determine if a long branch stub is needed. */
9229 max_branch_offset = 1 << 25;
9230 if (r_type != R_PPC64_REL24)
9231 max_branch_offset = 1 << 15;
9232
9233 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9234 /* We need a stub. Figure out whether a long_branch or plt_branch
9235 is needed later. */
9236 return ppc_stub_long_branch;
9237
9238 return ppc_stub_none;
9239 }
9240
9241 /* Build a .plt call stub. */
9242
9243 static inline bfd_byte *
9244 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
9245 {
9246 #define PPC_LO(v) ((v) & 0xffff)
9247 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9248 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9249
9250 if (PPC_HA (offset) != 0)
9251 {
9252 if (r != NULL)
9253 {
9254 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9255 r[1].r_offset = r[0].r_offset + 8;
9256 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9257 r[1].r_addend = r[0].r_addend;
9258 if (PPC_HA (offset + 16) != PPC_HA (offset))
9259 {
9260 r[2].r_offset = r[1].r_offset + 4;
9261 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9262 r[2].r_addend = r[0].r_addend;
9263 }
9264 else
9265 {
9266 r[2].r_offset = r[1].r_offset + 8;
9267 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9268 r[2].r_addend = r[0].r_addend + 8;
9269 r[3].r_offset = r[2].r_offset + 4;
9270 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9271 r[3].r_addend = r[0].r_addend + 16;
9272 }
9273 }
9274 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9275 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9276 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9277 if (PPC_HA (offset + 16) != PPC_HA (offset))
9278 {
9279 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9280 offset = 0;
9281 }
9282 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9283 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9284 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9285 bfd_put_32 (obfd, BCTR, p), p += 4;
9286 }
9287 else
9288 {
9289 if (r != NULL)
9290 {
9291 r[0].r_offset += 4;
9292 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9293 if (PPC_HA (offset + 16) != PPC_HA (offset))
9294 {
9295 r[1].r_offset = r[0].r_offset + 4;
9296 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9297 r[1].r_addend = r[0].r_addend;
9298 }
9299 else
9300 {
9301 r[1].r_offset = r[0].r_offset + 8;
9302 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9303 r[1].r_addend = r[0].r_addend + 16;
9304 r[2].r_offset = r[1].r_offset + 4;
9305 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9306 r[2].r_addend = r[0].r_addend + 8;
9307 }
9308 }
9309 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9310 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9311 if (PPC_HA (offset + 16) != PPC_HA (offset))
9312 {
9313 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9314 offset = 0;
9315 }
9316 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9317 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9318 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9319 bfd_put_32 (obfd, BCTR, p), p += 4;
9320 }
9321 return p;
9322 }
9323
9324 /* Build a special .plt call stub for __tls_get_addr. */
9325
9326 #define LD_R11_0R3 0xe9630000
9327 #define LD_R12_0R3 0xe9830000
9328 #define MR_R0_R3 0x7c601b78
9329 #define CMPDI_R11_0 0x2c2b0000
9330 #define ADD_R3_R12_R13 0x7c6c6a14
9331 #define BEQLR 0x4d820020
9332 #define MR_R3_R0 0x7c030378
9333 #define MFLR_R11 0x7d6802a6
9334 #define STD_R11_0R1 0xf9610000
9335 #define BCTRL 0x4e800421
9336 #define LD_R11_0R1 0xe9610000
9337 #define LD_R2_0R1 0xe8410000
9338 #define MTLR_R11 0x7d6803a6
9339
9340 static inline bfd_byte *
9341 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9342 Elf_Internal_Rela *r)
9343 {
9344 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9345 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9346 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9347 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9348 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9349 bfd_put_32 (obfd, BEQLR, p), p += 4;
9350 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9351 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9352 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9353
9354 if (r != NULL)
9355 r[0].r_offset += 9 * 4;
9356 p = build_plt_stub (obfd, p, offset, r);
9357 bfd_put_32 (obfd, BCTRL, p - 4);
9358
9359 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9360 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9361 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9362 bfd_put_32 (obfd, BLR, p), p += 4;
9363
9364 return p;
9365 }
9366
9367 static Elf_Internal_Rela *
9368 get_relocs (asection *sec, int count)
9369 {
9370 Elf_Internal_Rela *relocs;
9371 struct bfd_elf_section_data *elfsec_data;
9372
9373 elfsec_data = elf_section_data (sec);
9374 relocs = elfsec_data->relocs;
9375 if (relocs == NULL)
9376 {
9377 bfd_size_type relsize;
9378 relsize = sec->reloc_count * sizeof (*relocs);
9379 relocs = bfd_alloc (sec->owner, relsize);
9380 if (relocs == NULL)
9381 return NULL;
9382 elfsec_data->relocs = relocs;
9383 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9384 sizeof (Elf_Internal_Shdr));
9385 if (elfsec_data->rela.hdr == NULL)
9386 return NULL;
9387 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9388 * sizeof (Elf64_External_Rela));
9389 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9390 sec->reloc_count = 0;
9391 }
9392 relocs += sec->reloc_count;
9393 sec->reloc_count += count;
9394 return relocs;
9395 }
9396
9397 static bfd_boolean
9398 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9399 {
9400 struct ppc_stub_hash_entry *stub_entry;
9401 struct ppc_branch_hash_entry *br_entry;
9402 struct bfd_link_info *info;
9403 struct ppc_link_hash_table *htab;
9404 bfd_byte *loc;
9405 bfd_byte *p;
9406 bfd_vma dest, off;
9407 int size;
9408 Elf_Internal_Rela *r;
9409 asection *plt;
9410
9411 /* Massage our args to the form they really have. */
9412 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9413 info = in_arg;
9414
9415 htab = ppc_hash_table (info);
9416 if (htab == NULL)
9417 return FALSE;
9418
9419 /* Make a note of the offset within the stubs for this entry. */
9420 stub_entry->stub_offset = stub_entry->stub_sec->size;
9421 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9422
9423 htab->stub_count[stub_entry->stub_type - 1] += 1;
9424 switch (stub_entry->stub_type)
9425 {
9426 case ppc_stub_long_branch:
9427 case ppc_stub_long_branch_r2off:
9428 /* Branches are relative. This is where we are going to. */
9429 off = dest = (stub_entry->target_value
9430 + stub_entry->target_section->output_offset
9431 + stub_entry->target_section->output_section->vma);
9432
9433 /* And this is where we are coming from. */
9434 off -= (stub_entry->stub_offset
9435 + stub_entry->stub_sec->output_offset
9436 + stub_entry->stub_sec->output_section->vma);
9437
9438 size = 4;
9439 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9440 {
9441 bfd_vma r2off;
9442
9443 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9444 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9445 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9446 loc += 4;
9447 size = 12;
9448 if (PPC_HA (r2off) != 0)
9449 {
9450 size = 16;
9451 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9452 loc += 4;
9453 }
9454 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9455 loc += 4;
9456 off -= size - 4;
9457 }
9458 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9459
9460 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9461 {
9462 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9463 stub_entry->root.string);
9464 htab->stub_error = TRUE;
9465 return FALSE;
9466 }
9467
9468 if (info->emitrelocations)
9469 {
9470 r = get_relocs (stub_entry->stub_sec, 1);
9471 if (r == NULL)
9472 return FALSE;
9473 r->r_offset = loc - stub_entry->stub_sec->contents;
9474 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9475 r->r_addend = dest;
9476 if (stub_entry->h != NULL)
9477 {
9478 struct elf_link_hash_entry **hashes;
9479 unsigned long symndx;
9480 struct ppc_link_hash_entry *h;
9481
9482 hashes = elf_sym_hashes (htab->stub_bfd);
9483 if (hashes == NULL)
9484 {
9485 bfd_size_type hsize;
9486
9487 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9488 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9489 if (hashes == NULL)
9490 return FALSE;
9491 elf_sym_hashes (htab->stub_bfd) = hashes;
9492 htab->stub_globals = 1;
9493 }
9494 symndx = htab->stub_globals++;
9495 h = stub_entry->h;
9496 hashes[symndx] = &h->elf;
9497 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9498 if (h->oh != NULL && h->oh->is_func)
9499 h = ppc_follow_link (h->oh);
9500 if (h->elf.root.u.def.section != stub_entry->target_section)
9501 /* H is an opd symbol. The addend must be zero. */
9502 r->r_addend = 0;
9503 else
9504 {
9505 off = (h->elf.root.u.def.value
9506 + h->elf.root.u.def.section->output_offset
9507 + h->elf.root.u.def.section->output_section->vma);
9508 r->r_addend -= off;
9509 }
9510 }
9511 }
9512 break;
9513
9514 case ppc_stub_plt_branch:
9515 case ppc_stub_plt_branch_r2off:
9516 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9517 stub_entry->root.string + 9,
9518 FALSE, FALSE);
9519 if (br_entry == NULL)
9520 {
9521 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9522 stub_entry->root.string);
9523 htab->stub_error = TRUE;
9524 return FALSE;
9525 }
9526
9527 dest = (stub_entry->target_value
9528 + stub_entry->target_section->output_offset
9529 + stub_entry->target_section->output_section->vma);
9530
9531 bfd_put_64 (htab->brlt->owner, dest,
9532 htab->brlt->contents + br_entry->offset);
9533
9534 if (br_entry->iter == htab->stub_iteration)
9535 {
9536 br_entry->iter = 0;
9537
9538 if (htab->relbrlt != NULL)
9539 {
9540 /* Create a reloc for the branch lookup table entry. */
9541 Elf_Internal_Rela rela;
9542 bfd_byte *rl;
9543
9544 rela.r_offset = (br_entry->offset
9545 + htab->brlt->output_offset
9546 + htab->brlt->output_section->vma);
9547 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9548 rela.r_addend = dest;
9549
9550 rl = htab->relbrlt->contents;
9551 rl += (htab->relbrlt->reloc_count++
9552 * sizeof (Elf64_External_Rela));
9553 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9554 }
9555 else if (info->emitrelocations)
9556 {
9557 r = get_relocs (htab->brlt, 1);
9558 if (r == NULL)
9559 return FALSE;
9560 /* brlt, being SEC_LINKER_CREATED does not go through the
9561 normal reloc processing. Symbols and offsets are not
9562 translated from input file to output file form, so
9563 set up the offset per the output file. */
9564 r->r_offset = (br_entry->offset
9565 + htab->brlt->output_offset
9566 + htab->brlt->output_section->vma);
9567 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9568 r->r_addend = dest;
9569 }
9570 }
9571
9572 dest = (br_entry->offset
9573 + htab->brlt->output_offset
9574 + htab->brlt->output_section->vma);
9575
9576 off = (dest
9577 - elf_gp (htab->brlt->output_section->owner)
9578 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9579
9580 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9581 {
9582 (*_bfd_error_handler)
9583 (_("linkage table error against `%s'"),
9584 stub_entry->root.string);
9585 bfd_set_error (bfd_error_bad_value);
9586 htab->stub_error = TRUE;
9587 return FALSE;
9588 }
9589
9590 if (info->emitrelocations)
9591 {
9592 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9593 if (r == NULL)
9594 return FALSE;
9595 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9596 if (bfd_big_endian (info->output_bfd))
9597 r[0].r_offset += 2;
9598 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9599 r[0].r_offset += 4;
9600 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9601 r[0].r_addend = dest;
9602 if (PPC_HA (off) != 0)
9603 {
9604 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9605 r[1].r_offset = r[0].r_offset + 4;
9606 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9607 r[1].r_addend = r[0].r_addend;
9608 }
9609 }
9610
9611 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9612 {
9613 if (PPC_HA (off) != 0)
9614 {
9615 size = 16;
9616 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9617 loc += 4;
9618 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9619 }
9620 else
9621 {
9622 size = 12;
9623 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9624 }
9625 }
9626 else
9627 {
9628 bfd_vma r2off;
9629
9630 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9631 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9632 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9633 loc += 4;
9634 size = 20;
9635 if (PPC_HA (off) != 0)
9636 {
9637 size += 4;
9638 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9639 loc += 4;
9640 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9641 loc += 4;
9642 }
9643 else
9644 {
9645 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9646 loc += 4;
9647 }
9648
9649 if (PPC_HA (r2off) != 0)
9650 {
9651 size += 4;
9652 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9653 loc += 4;
9654 }
9655 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9656 }
9657 loc += 4;
9658 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9659 loc += 4;
9660 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9661 break;
9662
9663 case ppc_stub_plt_call:
9664 if (stub_entry->h != NULL
9665 && stub_entry->h->is_func_descriptor
9666 && stub_entry->h->oh != NULL)
9667 {
9668 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9669
9670 /* If the old-ABI "dot-symbol" is undefined make it weak so
9671 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9672 FIXME: We used to define the symbol on one of the call
9673 stubs instead, which is why we test symbol section id
9674 against htab->top_id in various places. Likely all
9675 these checks could now disappear. */
9676 if (fh->elf.root.type == bfd_link_hash_undefined)
9677 fh->elf.root.type = bfd_link_hash_undefweak;
9678 }
9679
9680 /* Now build the stub. */
9681 dest = stub_entry->plt_ent->plt.offset & ~1;
9682 if (dest >= (bfd_vma) -2)
9683 abort ();
9684
9685 plt = htab->plt;
9686 if (!htab->elf.dynamic_sections_created
9687 || stub_entry->h == NULL
9688 || stub_entry->h->elf.dynindx == -1)
9689 plt = htab->iplt;
9690
9691 dest += plt->output_offset + plt->output_section->vma;
9692
9693 if (stub_entry->h == NULL
9694 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9695 {
9696 Elf_Internal_Rela rela;
9697 bfd_byte *rl;
9698
9699 rela.r_offset = dest;
9700 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9701 rela.r_addend = (stub_entry->target_value
9702 + stub_entry->target_section->output_offset
9703 + stub_entry->target_section->output_section->vma);
9704
9705 rl = (htab->reliplt->contents
9706 + (htab->reliplt->reloc_count++
9707 * sizeof (Elf64_External_Rela)));
9708 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9709 stub_entry->plt_ent->plt.offset |= 1;
9710 }
9711
9712 off = (dest
9713 - elf_gp (plt->output_section->owner)
9714 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9715
9716 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9717 {
9718 (*_bfd_error_handler)
9719 (_("linkage table error against `%s'"),
9720 stub_entry->h != NULL
9721 ? stub_entry->h->elf.root.root.string
9722 : "<local sym>");
9723 bfd_set_error (bfd_error_bad_value);
9724 htab->stub_error = TRUE;
9725 return FALSE;
9726 }
9727
9728 r = NULL;
9729 if (info->emitrelocations)
9730 {
9731 r = get_relocs (stub_entry->stub_sec,
9732 (2 + (PPC_HA (off) != 0)
9733 + (PPC_HA (off + 16) == PPC_HA (off))));
9734 if (r == NULL)
9735 return FALSE;
9736 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9737 if (bfd_big_endian (info->output_bfd))
9738 r[0].r_offset += 2;
9739 r[0].r_addend = dest;
9740 }
9741 if (stub_entry->h != NULL
9742 && (stub_entry->h == htab->tls_get_addr_fd
9743 || stub_entry->h == htab->tls_get_addr)
9744 && !htab->no_tls_get_addr_opt)
9745 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9746 else
9747 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9748 size = p - loc;
9749 break;
9750
9751 default:
9752 BFD_FAIL ();
9753 return FALSE;
9754 }
9755
9756 stub_entry->stub_sec->size += size;
9757
9758 if (htab->emit_stub_syms)
9759 {
9760 struct elf_link_hash_entry *h;
9761 size_t len1, len2;
9762 char *name;
9763 const char *const stub_str[] = { "long_branch",
9764 "long_branch_r2off",
9765 "plt_branch",
9766 "plt_branch_r2off",
9767 "plt_call" };
9768
9769 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9770 len2 = strlen (stub_entry->root.string);
9771 name = bfd_malloc (len1 + len2 + 2);
9772 if (name == NULL)
9773 return FALSE;
9774 memcpy (name, stub_entry->root.string, 9);
9775 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9776 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9777 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9778 if (h == NULL)
9779 return FALSE;
9780 if (h->root.type == bfd_link_hash_new)
9781 {
9782 h->root.type = bfd_link_hash_defined;
9783 h->root.u.def.section = stub_entry->stub_sec;
9784 h->root.u.def.value = stub_entry->stub_offset;
9785 h->ref_regular = 1;
9786 h->def_regular = 1;
9787 h->ref_regular_nonweak = 1;
9788 h->forced_local = 1;
9789 h->non_elf = 0;
9790 }
9791 }
9792
9793 return TRUE;
9794 }
9795
9796 /* As above, but don't actually build the stub. Just bump offset so
9797 we know stub section sizes, and select plt_branch stubs where
9798 long_branch stubs won't do. */
9799
9800 static bfd_boolean
9801 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9802 {
9803 struct ppc_stub_hash_entry *stub_entry;
9804 struct bfd_link_info *info;
9805 struct ppc_link_hash_table *htab;
9806 bfd_vma off;
9807 int size;
9808
9809 /* Massage our args to the form they really have. */
9810 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9811 info = in_arg;
9812
9813 htab = ppc_hash_table (info);
9814 if (htab == NULL)
9815 return FALSE;
9816
9817 if (stub_entry->stub_type == ppc_stub_plt_call)
9818 {
9819 asection *plt;
9820 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9821 if (off >= (bfd_vma) -2)
9822 abort ();
9823 plt = htab->plt;
9824 if (!htab->elf.dynamic_sections_created
9825 || stub_entry->h == NULL
9826 || stub_entry->h->elf.dynindx == -1)
9827 plt = htab->iplt;
9828 off += (plt->output_offset
9829 + plt->output_section->vma
9830 - elf_gp (plt->output_section->owner)
9831 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9832
9833 size = PLT_CALL_STUB_SIZE;
9834 if (PPC_HA (off) == 0)
9835 size -= 4;
9836 if (PPC_HA (off + 16) != PPC_HA (off))
9837 size += 4;
9838 if (stub_entry->h != NULL
9839 && (stub_entry->h == htab->tls_get_addr_fd
9840 || stub_entry->h == htab->tls_get_addr)
9841 && !htab->no_tls_get_addr_opt)
9842 size += 13 * 4;
9843 if (info->emitrelocations)
9844 {
9845 stub_entry->stub_sec->reloc_count
9846 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9847 stub_entry->stub_sec->flags |= SEC_RELOC;
9848 }
9849 }
9850 else
9851 {
9852 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9853 variants. */
9854 bfd_vma r2off = 0;
9855
9856 off = (stub_entry->target_value
9857 + stub_entry->target_section->output_offset
9858 + stub_entry->target_section->output_section->vma);
9859 off -= (stub_entry->stub_sec->size
9860 + stub_entry->stub_sec->output_offset
9861 + stub_entry->stub_sec->output_section->vma);
9862
9863 /* Reset the stub type from the plt variant in case we now
9864 can reach with a shorter stub. */
9865 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9866 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9867
9868 size = 4;
9869 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9870 {
9871 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9872 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9873 size = 12;
9874 if (PPC_HA (r2off) != 0)
9875 size = 16;
9876 off -= size - 4;
9877 }
9878
9879 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9880 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9881 {
9882 struct ppc_branch_hash_entry *br_entry;
9883
9884 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9885 stub_entry->root.string + 9,
9886 TRUE, FALSE);
9887 if (br_entry == NULL)
9888 {
9889 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9890 stub_entry->root.string);
9891 htab->stub_error = TRUE;
9892 return FALSE;
9893 }
9894
9895 if (br_entry->iter != htab->stub_iteration)
9896 {
9897 br_entry->iter = htab->stub_iteration;
9898 br_entry->offset = htab->brlt->size;
9899 htab->brlt->size += 8;
9900
9901 if (htab->relbrlt != NULL)
9902 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9903 else if (info->emitrelocations)
9904 {
9905 htab->brlt->reloc_count += 1;
9906 htab->brlt->flags |= SEC_RELOC;
9907 }
9908 }
9909
9910 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9911 off = (br_entry->offset
9912 + htab->brlt->output_offset
9913 + htab->brlt->output_section->vma
9914 - elf_gp (htab->brlt->output_section->owner)
9915 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9916
9917 if (info->emitrelocations)
9918 {
9919 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9920 stub_entry->stub_sec->flags |= SEC_RELOC;
9921 }
9922
9923 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9924 {
9925 size = 12;
9926 if (PPC_HA (off) != 0)
9927 size = 16;
9928 }
9929 else
9930 {
9931 size = 20;
9932 if (PPC_HA (off) != 0)
9933 size += 4;
9934
9935 if (PPC_HA (r2off) != 0)
9936 size += 4;
9937 }
9938 }
9939 else if (info->emitrelocations)
9940 {
9941 stub_entry->stub_sec->reloc_count += 1;
9942 stub_entry->stub_sec->flags |= SEC_RELOC;
9943 }
9944 }
9945
9946 stub_entry->stub_sec->size += size;
9947 return TRUE;
9948 }
9949
9950 /* Set up various things so that we can make a list of input sections
9951 for each output section included in the link. Returns -1 on error,
9952 0 when no stubs will be needed, and 1 on success. */
9953
9954 int
9955 ppc64_elf_setup_section_lists
9956 (struct bfd_link_info *info,
9957 asection *(*add_stub_section) (const char *, asection *),
9958 void (*layout_sections_again) (void))
9959 {
9960 bfd *input_bfd;
9961 int top_id, top_index, id;
9962 asection *section;
9963 asection **input_list;
9964 bfd_size_type amt;
9965 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9966
9967 if (htab == NULL)
9968 return -1;
9969 /* Stash our params away. */
9970 htab->add_stub_section = add_stub_section;
9971 htab->layout_sections_again = layout_sections_again;
9972
9973 if (htab->brlt == NULL)
9974 return 0;
9975
9976 /* Find the top input section id. */
9977 for (input_bfd = info->input_bfds, top_id = 3;
9978 input_bfd != NULL;
9979 input_bfd = input_bfd->link_next)
9980 {
9981 for (section = input_bfd->sections;
9982 section != NULL;
9983 section = section->next)
9984 {
9985 if (top_id < section->id)
9986 top_id = section->id;
9987 }
9988 }
9989
9990 htab->top_id = top_id;
9991 amt = sizeof (struct map_stub) * (top_id + 1);
9992 htab->stub_group = bfd_zmalloc (amt);
9993 if (htab->stub_group == NULL)
9994 return -1;
9995
9996 /* Set toc_off for com, und, abs and ind sections. */
9997 for (id = 0; id < 3; id++)
9998 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9999
10000 /* We can't use output_bfd->section_count here to find the top output
10001 section index as some sections may have been removed, and
10002 strip_excluded_output_sections doesn't renumber the indices. */
10003 for (section = info->output_bfd->sections, top_index = 0;
10004 section != NULL;
10005 section = section->next)
10006 {
10007 if (top_index < section->index)
10008 top_index = section->index;
10009 }
10010
10011 htab->top_index = top_index;
10012 amt = sizeof (asection *) * (top_index + 1);
10013 input_list = bfd_zmalloc (amt);
10014 htab->input_list = input_list;
10015 if (input_list == NULL)
10016 return -1;
10017
10018 return 1;
10019 }
10020
10021 /* Set up for first pass at multitoc partitioning. */
10022
10023 void
10024 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10025 {
10026 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10027
10028 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10029 htab->toc_curr = elf_gp (info->output_bfd);
10030 htab->toc_bfd = NULL;
10031 htab->toc_first_sec = NULL;
10032 }
10033
10034 /* The linker repeatedly calls this function for each TOC input section
10035 and linker generated GOT section. Group input bfds such that the toc
10036 within a group is less than 64k in size. */
10037
10038 bfd_boolean
10039 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10040 {
10041 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10042 bfd_vma addr, off, limit;
10043
10044 if (htab == NULL)
10045 return FALSE;
10046
10047 if (!htab->second_toc_pass)
10048 {
10049 /* Keep track of the first .toc or .got section for this input bfd. */
10050 if (htab->toc_bfd != isec->owner)
10051 {
10052 htab->toc_bfd = isec->owner;
10053 htab->toc_first_sec = isec;
10054 }
10055
10056 addr = isec->output_offset + isec->output_section->vma;
10057 off = addr - htab->toc_curr;
10058 limit = 0x80008000;
10059 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10060 limit = 0x10000;
10061 if (off + isec->size > limit)
10062 {
10063 addr = (htab->toc_first_sec->output_offset
10064 + htab->toc_first_sec->output_section->vma);
10065 htab->toc_curr = addr;
10066 }
10067
10068 /* toc_curr is the base address of this toc group. Set elf_gp
10069 for the input section to be the offset relative to the
10070 output toc base plus 0x8000. Making the input elf_gp an
10071 offset allows us to move the toc as a whole without
10072 recalculating input elf_gp. */
10073 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10074 off += TOC_BASE_OFF;
10075
10076 /* Die if someone uses a linker script that doesn't keep input
10077 file .toc and .got together. */
10078 if (elf_gp (isec->owner) != 0
10079 && elf_gp (isec->owner) != off)
10080 return FALSE;
10081
10082 elf_gp (isec->owner) = off;
10083 return TRUE;
10084 }
10085
10086 /* During the second pass toc_first_sec points to the start of
10087 a toc group, and toc_curr is used to track the old elf_gp.
10088 We use toc_bfd to ensure we only look at each bfd once. */
10089 if (htab->toc_bfd == isec->owner)
10090 return TRUE;
10091 htab->toc_bfd = isec->owner;
10092
10093 if (htab->toc_first_sec == NULL
10094 || htab->toc_curr != elf_gp (isec->owner))
10095 {
10096 htab->toc_curr = elf_gp (isec->owner);
10097 htab->toc_first_sec = isec;
10098 }
10099 addr = (htab->toc_first_sec->output_offset
10100 + htab->toc_first_sec->output_section->vma);
10101 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10102 elf_gp (isec->owner) = off;
10103
10104 return TRUE;
10105 }
10106
10107 /* Called via elf_link_hash_traverse to merge GOT entries for global
10108 symbol H. */
10109
10110 static bfd_boolean
10111 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10112 {
10113 if (h->root.type == bfd_link_hash_indirect)
10114 return TRUE;
10115
10116 if (h->root.type == bfd_link_hash_warning)
10117 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10118
10119 merge_got_entries (&h->got.glist);
10120
10121 return TRUE;
10122 }
10123
10124 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10125 symbol H. */
10126
10127 static bfd_boolean
10128 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10129 {
10130 struct got_entry *gent;
10131
10132 if (h->root.type == bfd_link_hash_indirect)
10133 return TRUE;
10134
10135 if (h->root.type == bfd_link_hash_warning)
10136 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10137
10138 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10139 if (!gent->is_indirect)
10140 allocate_got (h, (struct bfd_link_info *) inf, gent);
10141 return TRUE;
10142 }
10143
10144 /* Called on the first multitoc pass after the last call to
10145 ppc64_elf_next_toc_section. This function removes duplicate GOT
10146 entries. */
10147
10148 bfd_boolean
10149 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10150 {
10151 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10152 struct bfd *ibfd, *ibfd2;
10153 bfd_boolean done_something;
10154
10155 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10156
10157 if (!htab->do_multi_toc)
10158 return FALSE;
10159
10160 /* Merge global sym got entries within a toc group. */
10161 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10162
10163 /* And tlsld_got. */
10164 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10165 {
10166 struct got_entry *ent, *ent2;
10167
10168 if (!is_ppc64_elf (ibfd))
10169 continue;
10170
10171 ent = ppc64_tlsld_got (ibfd);
10172 if (!ent->is_indirect
10173 && ent->got.offset != (bfd_vma) -1)
10174 {
10175 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10176 {
10177 if (!is_ppc64_elf (ibfd2))
10178 continue;
10179
10180 ent2 = ppc64_tlsld_got (ibfd2);
10181 if (!ent2->is_indirect
10182 && ent2->got.offset != (bfd_vma) -1
10183 && elf_gp (ibfd2) == elf_gp (ibfd))
10184 {
10185 ent2->is_indirect = TRUE;
10186 ent2->got.ent = ent;
10187 }
10188 }
10189 }
10190 }
10191
10192 /* Zap sizes of got sections. */
10193 htab->reliplt->rawsize = htab->reliplt->size;
10194 htab->reliplt->size -= htab->got_reli_size;
10195 htab->got_reli_size = 0;
10196
10197 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10198 {
10199 asection *got, *relgot;
10200
10201 if (!is_ppc64_elf (ibfd))
10202 continue;
10203
10204 got = ppc64_elf_tdata (ibfd)->got;
10205 if (got != NULL)
10206 {
10207 got->rawsize = got->size;
10208 got->size = 0;
10209 relgot = ppc64_elf_tdata (ibfd)->relgot;
10210 relgot->rawsize = relgot->size;
10211 relgot->size = 0;
10212 }
10213 }
10214
10215 /* Now reallocate the got, local syms first. We don't need to
10216 allocate section contents again since we never increase size. */
10217 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10218 {
10219 struct got_entry **lgot_ents;
10220 struct got_entry **end_lgot_ents;
10221 struct plt_entry **local_plt;
10222 struct plt_entry **end_local_plt;
10223 unsigned char *lgot_masks;
10224 bfd_size_type locsymcount;
10225 Elf_Internal_Shdr *symtab_hdr;
10226 asection *s, *srel;
10227
10228 if (!is_ppc64_elf (ibfd))
10229 continue;
10230
10231 lgot_ents = elf_local_got_ents (ibfd);
10232 if (!lgot_ents)
10233 continue;
10234
10235 symtab_hdr = &elf_symtab_hdr (ibfd);
10236 locsymcount = symtab_hdr->sh_info;
10237 end_lgot_ents = lgot_ents + locsymcount;
10238 local_plt = (struct plt_entry **) end_lgot_ents;
10239 end_local_plt = local_plt + locsymcount;
10240 lgot_masks = (unsigned char *) end_local_plt;
10241 s = ppc64_elf_tdata (ibfd)->got;
10242 srel = ppc64_elf_tdata (ibfd)->relgot;
10243 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10244 {
10245 struct got_entry *ent;
10246
10247 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10248 {
10249 unsigned int num = 1;
10250 ent->got.offset = s->size;
10251 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10252 num = 2;
10253 s->size += num * 8;
10254 if (info->shared)
10255 srel->size += num * sizeof (Elf64_External_Rela);
10256 else if ((*lgot_masks & PLT_IFUNC) != 0)
10257 {
10258 htab->reliplt->size
10259 += num * sizeof (Elf64_External_Rela);
10260 htab->got_reli_size
10261 += num * sizeof (Elf64_External_Rela);
10262 }
10263 }
10264 }
10265 }
10266
10267 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10268
10269 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10270 {
10271 struct got_entry *ent;
10272
10273 if (!is_ppc64_elf (ibfd))
10274 continue;
10275
10276 ent = ppc64_tlsld_got (ibfd);
10277 if (!ent->is_indirect
10278 && ent->got.offset != (bfd_vma) -1)
10279 {
10280 asection *s = ppc64_elf_tdata (ibfd)->got;
10281 ent->got.offset = s->size;
10282 s->size += 16;
10283 if (info->shared)
10284 {
10285 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10286 srel->size += sizeof (Elf64_External_Rela);
10287 }
10288 }
10289 }
10290
10291 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10292 if (!done_something)
10293 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10294 {
10295 asection *got;
10296
10297 if (!is_ppc64_elf (ibfd))
10298 continue;
10299
10300 got = ppc64_elf_tdata (ibfd)->got;
10301 if (got != NULL)
10302 {
10303 done_something = got->rawsize != got->size;
10304 if (done_something)
10305 break;
10306 }
10307 }
10308
10309 if (done_something)
10310 (*htab->layout_sections_again) ();
10311
10312 /* Set up for second pass over toc sections to recalculate elf_gp
10313 on input sections. */
10314 htab->toc_bfd = NULL;
10315 htab->toc_first_sec = NULL;
10316 htab->second_toc_pass = TRUE;
10317 return done_something;
10318 }
10319
10320 /* Called after second pass of multitoc partitioning. */
10321
10322 void
10323 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10324 {
10325 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10326
10327 /* After the second pass, toc_curr tracks the TOC offset used
10328 for code sections below in ppc64_elf_next_input_section. */
10329 htab->toc_curr = TOC_BASE_OFF;
10330 }
10331
10332 /* No toc references were found in ISEC. If the code in ISEC makes no
10333 calls, then there's no need to use toc adjusting stubs when branching
10334 into ISEC. Actually, indirect calls from ISEC are OK as they will
10335 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10336 needed, and 2 if a cyclical call-graph was found but no other reason
10337 for a stub was detected. If called from the top level, a return of
10338 2 means the same as a return of 0. */
10339
10340 static int
10341 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10342 {
10343 int ret;
10344
10345 /* Mark this section as checked. */
10346 isec->call_check_done = 1;
10347
10348 /* We know none of our code bearing sections will need toc stubs. */
10349 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10350 return 0;
10351
10352 if (isec->size == 0)
10353 return 0;
10354
10355 if (isec->output_section == NULL)
10356 return 0;
10357
10358 ret = 0;
10359 if (isec->reloc_count != 0)
10360 {
10361 Elf_Internal_Rela *relstart, *rel;
10362 Elf_Internal_Sym *local_syms;
10363 struct ppc_link_hash_table *htab;
10364
10365 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10366 info->keep_memory);
10367 if (relstart == NULL)
10368 return -1;
10369
10370 /* Look for branches to outside of this section. */
10371 local_syms = NULL;
10372 htab = ppc_hash_table (info);
10373 if (htab == NULL)
10374 return -1;
10375
10376 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10377 {
10378 enum elf_ppc64_reloc_type r_type;
10379 unsigned long r_symndx;
10380 struct elf_link_hash_entry *h;
10381 struct ppc_link_hash_entry *eh;
10382 Elf_Internal_Sym *sym;
10383 asection *sym_sec;
10384 struct _opd_sec_data *opd;
10385 bfd_vma sym_value;
10386 bfd_vma dest;
10387
10388 r_type = ELF64_R_TYPE (rel->r_info);
10389 if (r_type != R_PPC64_REL24
10390 && r_type != R_PPC64_REL14
10391 && r_type != R_PPC64_REL14_BRTAKEN
10392 && r_type != R_PPC64_REL14_BRNTAKEN)
10393 continue;
10394
10395 r_symndx = ELF64_R_SYM (rel->r_info);
10396 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10397 isec->owner))
10398 {
10399 ret = -1;
10400 break;
10401 }
10402
10403 /* Calls to dynamic lib functions go through a plt call stub
10404 that uses r2. */
10405 eh = (struct ppc_link_hash_entry *) h;
10406 if (eh != NULL
10407 && (eh->elf.plt.plist != NULL
10408 || (eh->oh != NULL
10409 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10410 {
10411 ret = 1;
10412 break;
10413 }
10414
10415 if (sym_sec == NULL)
10416 /* Ignore other undefined symbols. */
10417 continue;
10418
10419 /* Assume branches to other sections not included in the
10420 link need stubs too, to cover -R and absolute syms. */
10421 if (sym_sec->output_section == NULL)
10422 {
10423 ret = 1;
10424 break;
10425 }
10426
10427 if (h == NULL)
10428 sym_value = sym->st_value;
10429 else
10430 {
10431 if (h->root.type != bfd_link_hash_defined
10432 && h->root.type != bfd_link_hash_defweak)
10433 abort ();
10434 sym_value = h->root.u.def.value;
10435 }
10436 sym_value += rel->r_addend;
10437
10438 /* If this branch reloc uses an opd sym, find the code section. */
10439 opd = get_opd_info (sym_sec);
10440 if (opd != NULL)
10441 {
10442 if (h == NULL && opd->adjust != NULL)
10443 {
10444 long adjust;
10445
10446 adjust = opd->adjust[sym->st_value / 8];
10447 if (adjust == -1)
10448 /* Assume deleted functions won't ever be called. */
10449 continue;
10450 sym_value += adjust;
10451 }
10452
10453 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10454 if (dest == (bfd_vma) -1)
10455 continue;
10456 }
10457 else
10458 dest = (sym_value
10459 + sym_sec->output_offset
10460 + sym_sec->output_section->vma);
10461
10462 /* Ignore branch to self. */
10463 if (sym_sec == isec)
10464 continue;
10465
10466 /* If the called function uses the toc, we need a stub. */
10467 if (sym_sec->has_toc_reloc
10468 || sym_sec->makes_toc_func_call)
10469 {
10470 ret = 1;
10471 break;
10472 }
10473
10474 /* Assume any branch that needs a long branch stub might in fact
10475 need a plt_branch stub. A plt_branch stub uses r2. */
10476 else if (dest - (isec->output_offset
10477 + isec->output_section->vma
10478 + rel->r_offset) + (1 << 25) >= (2 << 25))
10479 {
10480 ret = 1;
10481 break;
10482 }
10483
10484 /* If calling back to a section in the process of being
10485 tested, we can't say for sure that no toc adjusting stubs
10486 are needed, so don't return zero. */
10487 else if (sym_sec->call_check_in_progress)
10488 ret = 2;
10489
10490 /* Branches to another section that itself doesn't have any TOC
10491 references are OK. Recursively call ourselves to check. */
10492 else if (!sym_sec->call_check_done)
10493 {
10494 int recur;
10495
10496 /* Mark current section as indeterminate, so that other
10497 sections that call back to current won't be marked as
10498 known. */
10499 isec->call_check_in_progress = 1;
10500 recur = toc_adjusting_stub_needed (info, sym_sec);
10501 isec->call_check_in_progress = 0;
10502
10503 if (recur != 0)
10504 {
10505 ret = recur;
10506 if (recur != 2)
10507 break;
10508 }
10509 }
10510 }
10511
10512 if (local_syms != NULL
10513 && (elf_symtab_hdr (isec->owner).contents
10514 != (unsigned char *) local_syms))
10515 free (local_syms);
10516 if (elf_section_data (isec)->relocs != relstart)
10517 free (relstart);
10518 }
10519
10520 if ((ret & 1) == 0
10521 && isec->map_head.s != NULL
10522 && (strcmp (isec->output_section->name, ".init") == 0
10523 || strcmp (isec->output_section->name, ".fini") == 0))
10524 {
10525 if (isec->map_head.s->has_toc_reloc
10526 || isec->map_head.s->makes_toc_func_call)
10527 ret = 1;
10528 else if (!isec->map_head.s->call_check_done)
10529 {
10530 int recur;
10531 isec->call_check_in_progress = 1;
10532 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10533 isec->call_check_in_progress = 0;
10534 if (recur != 0)
10535 ret = recur;
10536 }
10537 }
10538
10539 if (ret == 1)
10540 isec->makes_toc_func_call = 1;
10541
10542 return ret;
10543 }
10544
10545 /* The linker repeatedly calls this function for each input section,
10546 in the order that input sections are linked into output sections.
10547 Build lists of input sections to determine groupings between which
10548 we may insert linker stubs. */
10549
10550 bfd_boolean
10551 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10552 {
10553 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10554
10555 if (htab == NULL)
10556 return FALSE;
10557
10558 if ((isec->output_section->flags & SEC_CODE) != 0
10559 && isec->output_section->index <= htab->top_index)
10560 {
10561 asection **list = htab->input_list + isec->output_section->index;
10562 /* Steal the link_sec pointer for our list. */
10563 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10564 /* This happens to make the list in reverse order,
10565 which is what we want. */
10566 PREV_SEC (isec) = *list;
10567 *list = isec;
10568 }
10569
10570 if (htab->multi_toc_needed)
10571 {
10572 /* If a code section has a function that uses the TOC then we need
10573 to use the right TOC (obviously). Also, make sure that .opd gets
10574 the correct TOC value for R_PPC64_TOC relocs that don't have or
10575 can't find their function symbol (shouldn't ever happen now).
10576 Also specially treat .fixup for the linux kernel. .fixup
10577 contains branches, but only back to the function that hit an
10578 exception. */
10579 if (isec->has_toc_reloc
10580 || (isec->flags & SEC_CODE) == 0
10581 || strcmp (isec->name, ".fixup") == 0)
10582 {
10583 if (elf_gp (isec->owner) != 0)
10584 htab->toc_curr = elf_gp (isec->owner);
10585 }
10586 else
10587 {
10588 if (!isec->call_check_done
10589 && toc_adjusting_stub_needed (info, isec) < 0)
10590 return FALSE;
10591 /* If we make a local call from this section, ie. a branch
10592 without a following nop, then we have no place to put a
10593 toc restoring insn. We must use the same toc group as
10594 the callee.
10595 Testing makes_toc_func_call actually tests for *any*
10596 calls to functions that need a good toc pointer. A more
10597 precise test would be better, as this one will set
10598 incorrect values for pasted .init/.fini fragments.
10599 (Fixed later in check_pasted_section.) */
10600 if (isec->makes_toc_func_call
10601 && elf_gp (isec->owner) != 0)
10602 htab->toc_curr = elf_gp (isec->owner);
10603 }
10604 }
10605
10606 /* Functions that don't use the TOC can belong in any TOC group.
10607 Use the last TOC base. */
10608 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10609 return TRUE;
10610 }
10611
10612 /* Check that all .init and .fini sections use the same toc, if they
10613 have toc relocs. */
10614
10615 static bfd_boolean
10616 check_pasted_section (struct bfd_link_info *info, const char *name)
10617 {
10618 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10619
10620 if (o != NULL)
10621 {
10622 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10623 bfd_vma toc_off = 0;
10624 asection *i;
10625
10626 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10627 if (i->has_toc_reloc)
10628 {
10629 if (toc_off == 0)
10630 toc_off = htab->stub_group[i->id].toc_off;
10631 else if (toc_off != htab->stub_group[i->id].toc_off)
10632 return FALSE;
10633 }
10634
10635 if (toc_off == 0)
10636 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10637 if (i->makes_toc_func_call)
10638 {
10639 toc_off = htab->stub_group[i->id].toc_off;
10640 break;
10641 }
10642
10643 /* Make sure the whole pasted function uses the same toc offset. */
10644 if (toc_off != 0)
10645 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10646 htab->stub_group[i->id].toc_off = toc_off;
10647 }
10648 return TRUE;
10649 }
10650
10651 bfd_boolean
10652 ppc64_elf_check_init_fini (struct bfd_link_info *info)
10653 {
10654 return (check_pasted_section (info, ".init")
10655 & check_pasted_section (info, ".fini"));
10656 }
10657
10658 /* See whether we can group stub sections together. Grouping stub
10659 sections may result in fewer stubs. More importantly, we need to
10660 put all .init* and .fini* stubs at the beginning of the .init or
10661 .fini output sections respectively, because glibc splits the
10662 _init and _fini functions into multiple parts. Putting a stub in
10663 the middle of a function is not a good idea. */
10664
10665 static void
10666 group_sections (struct ppc_link_hash_table *htab,
10667 bfd_size_type stub_group_size,
10668 bfd_boolean stubs_always_before_branch)
10669 {
10670 asection **list;
10671 bfd_size_type stub14_group_size;
10672 bfd_boolean suppress_size_errors;
10673
10674 suppress_size_errors = FALSE;
10675 stub14_group_size = stub_group_size;
10676 if (stub_group_size == 1)
10677 {
10678 /* Default values. */
10679 if (stubs_always_before_branch)
10680 {
10681 stub_group_size = 0x1e00000;
10682 stub14_group_size = 0x7800;
10683 }
10684 else
10685 {
10686 stub_group_size = 0x1c00000;
10687 stub14_group_size = 0x7000;
10688 }
10689 suppress_size_errors = TRUE;
10690 }
10691
10692 list = htab->input_list + htab->top_index;
10693 do
10694 {
10695 asection *tail = *list;
10696 while (tail != NULL)
10697 {
10698 asection *curr;
10699 asection *prev;
10700 bfd_size_type total;
10701 bfd_boolean big_sec;
10702 bfd_vma curr_toc;
10703
10704 curr = tail;
10705 total = tail->size;
10706 big_sec = total > (ppc64_elf_section_data (tail) != NULL
10707 && ppc64_elf_section_data (tail)->has_14bit_branch
10708 ? stub14_group_size : stub_group_size);
10709 if (big_sec && !suppress_size_errors)
10710 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10711 tail->owner, tail);
10712 curr_toc = htab->stub_group[tail->id].toc_off;
10713
10714 while ((prev = PREV_SEC (curr)) != NULL
10715 && ((total += curr->output_offset - prev->output_offset)
10716 < (ppc64_elf_section_data (prev) != NULL
10717 && ppc64_elf_section_data (prev)->has_14bit_branch
10718 ? stub14_group_size : stub_group_size))
10719 && htab->stub_group[prev->id].toc_off == curr_toc)
10720 curr = prev;
10721
10722 /* OK, the size from the start of CURR to the end is less
10723 than stub_group_size and thus can be handled by one stub
10724 section. (or the tail section is itself larger than
10725 stub_group_size, in which case we may be toast.) We
10726 should really be keeping track of the total size of stubs
10727 added here, as stubs contribute to the final output
10728 section size. That's a little tricky, and this way will
10729 only break if stubs added make the total size more than
10730 2^25, ie. for the default stub_group_size, if stubs total
10731 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10732 do
10733 {
10734 prev = PREV_SEC (tail);
10735 /* Set up this stub group. */
10736 htab->stub_group[tail->id].link_sec = curr;
10737 }
10738 while (tail != curr && (tail = prev) != NULL);
10739
10740 /* But wait, there's more! Input sections up to stub_group_size
10741 bytes before the stub section can be handled by it too.
10742 Don't do this if we have a really large section after the
10743 stubs, as adding more stubs increases the chance that
10744 branches may not reach into the stub section. */
10745 if (!stubs_always_before_branch && !big_sec)
10746 {
10747 total = 0;
10748 while (prev != NULL
10749 && ((total += tail->output_offset - prev->output_offset)
10750 < (ppc64_elf_section_data (prev) != NULL
10751 && ppc64_elf_section_data (prev)->has_14bit_branch
10752 ? stub14_group_size : stub_group_size))
10753 && htab->stub_group[prev->id].toc_off == curr_toc)
10754 {
10755 tail = prev;
10756 prev = PREV_SEC (tail);
10757 htab->stub_group[tail->id].link_sec = curr;
10758 }
10759 }
10760 tail = prev;
10761 }
10762 }
10763 while (list-- != htab->input_list);
10764 free (htab->input_list);
10765 #undef PREV_SEC
10766 }
10767
10768 /* Determine and set the size of the stub section for a final link.
10769
10770 The basic idea here is to examine all the relocations looking for
10771 PC-relative calls to a target that is unreachable with a "bl"
10772 instruction. */
10773
10774 bfd_boolean
10775 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size)
10776 {
10777 bfd_size_type stub_group_size;
10778 bfd_boolean stubs_always_before_branch;
10779 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10780
10781 if (htab == NULL)
10782 return FALSE;
10783
10784 stubs_always_before_branch = group_size < 0;
10785 if (group_size < 0)
10786 stub_group_size = -group_size;
10787 else
10788 stub_group_size = group_size;
10789
10790 group_sections (htab, stub_group_size, stubs_always_before_branch);
10791
10792 while (1)
10793 {
10794 bfd *input_bfd;
10795 unsigned int bfd_indx;
10796 asection *stub_sec;
10797
10798 htab->stub_iteration += 1;
10799
10800 for (input_bfd = info->input_bfds, bfd_indx = 0;
10801 input_bfd != NULL;
10802 input_bfd = input_bfd->link_next, bfd_indx++)
10803 {
10804 Elf_Internal_Shdr *symtab_hdr;
10805 asection *section;
10806 Elf_Internal_Sym *local_syms = NULL;
10807
10808 if (!is_ppc64_elf (input_bfd))
10809 continue;
10810
10811 /* We'll need the symbol table in a second. */
10812 symtab_hdr = &elf_symtab_hdr (input_bfd);
10813 if (symtab_hdr->sh_info == 0)
10814 continue;
10815
10816 /* Walk over each section attached to the input bfd. */
10817 for (section = input_bfd->sections;
10818 section != NULL;
10819 section = section->next)
10820 {
10821 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10822
10823 /* If there aren't any relocs, then there's nothing more
10824 to do. */
10825 if ((section->flags & SEC_RELOC) == 0
10826 || (section->flags & SEC_ALLOC) == 0
10827 || (section->flags & SEC_LOAD) == 0
10828 || (section->flags & SEC_CODE) == 0
10829 || section->reloc_count == 0)
10830 continue;
10831
10832 /* If this section is a link-once section that will be
10833 discarded, then don't create any stubs. */
10834 if (section->output_section == NULL
10835 || section->output_section->owner != info->output_bfd)
10836 continue;
10837
10838 /* Get the relocs. */
10839 internal_relocs
10840 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10841 info->keep_memory);
10842 if (internal_relocs == NULL)
10843 goto error_ret_free_local;
10844
10845 /* Now examine each relocation. */
10846 irela = internal_relocs;
10847 irelaend = irela + section->reloc_count;
10848 for (; irela < irelaend; irela++)
10849 {
10850 enum elf_ppc64_reloc_type r_type;
10851 unsigned int r_indx;
10852 enum ppc_stub_type stub_type;
10853 struct ppc_stub_hash_entry *stub_entry;
10854 asection *sym_sec, *code_sec;
10855 bfd_vma sym_value, code_value;
10856 bfd_vma destination;
10857 bfd_boolean ok_dest;
10858 struct ppc_link_hash_entry *hash;
10859 struct ppc_link_hash_entry *fdh;
10860 struct elf_link_hash_entry *h;
10861 Elf_Internal_Sym *sym;
10862 char *stub_name;
10863 const asection *id_sec;
10864 struct _opd_sec_data *opd;
10865 struct plt_entry *plt_ent;
10866
10867 r_type = ELF64_R_TYPE (irela->r_info);
10868 r_indx = ELF64_R_SYM (irela->r_info);
10869
10870 if (r_type >= R_PPC64_max)
10871 {
10872 bfd_set_error (bfd_error_bad_value);
10873 goto error_ret_free_internal;
10874 }
10875
10876 /* Only look for stubs on branch instructions. */
10877 if (r_type != R_PPC64_REL24
10878 && r_type != R_PPC64_REL14
10879 && r_type != R_PPC64_REL14_BRTAKEN
10880 && r_type != R_PPC64_REL14_BRNTAKEN)
10881 continue;
10882
10883 /* Now determine the call target, its name, value,
10884 section. */
10885 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10886 r_indx, input_bfd))
10887 goto error_ret_free_internal;
10888 hash = (struct ppc_link_hash_entry *) h;
10889
10890 ok_dest = FALSE;
10891 fdh = NULL;
10892 sym_value = 0;
10893 if (hash == NULL)
10894 {
10895 sym_value = sym->st_value;
10896 ok_dest = TRUE;
10897 }
10898 else if (hash->elf.root.type == bfd_link_hash_defined
10899 || hash->elf.root.type == bfd_link_hash_defweak)
10900 {
10901 sym_value = hash->elf.root.u.def.value;
10902 if (sym_sec->output_section != NULL)
10903 ok_dest = TRUE;
10904 }
10905 else if (hash->elf.root.type == bfd_link_hash_undefweak
10906 || hash->elf.root.type == bfd_link_hash_undefined)
10907 {
10908 /* Recognise an old ABI func code entry sym, and
10909 use the func descriptor sym instead if it is
10910 defined. */
10911 if (hash->elf.root.root.string[0] == '.'
10912 && (fdh = lookup_fdh (hash, htab)) != NULL)
10913 {
10914 if (fdh->elf.root.type == bfd_link_hash_defined
10915 || fdh->elf.root.type == bfd_link_hash_defweak)
10916 {
10917 sym_sec = fdh->elf.root.u.def.section;
10918 sym_value = fdh->elf.root.u.def.value;
10919 if (sym_sec->output_section != NULL)
10920 ok_dest = TRUE;
10921 }
10922 else
10923 fdh = NULL;
10924 }
10925 }
10926 else
10927 {
10928 bfd_set_error (bfd_error_bad_value);
10929 goto error_ret_free_internal;
10930 }
10931
10932 destination = 0;
10933 if (ok_dest)
10934 {
10935 sym_value += irela->r_addend;
10936 destination = (sym_value
10937 + sym_sec->output_offset
10938 + sym_sec->output_section->vma);
10939 }
10940
10941 code_sec = sym_sec;
10942 code_value = sym_value;
10943 opd = get_opd_info (sym_sec);
10944 if (opd != NULL)
10945 {
10946 bfd_vma dest;
10947
10948 if (hash == NULL && opd->adjust != NULL)
10949 {
10950 long adjust = opd->adjust[sym_value / 8];
10951 if (adjust == -1)
10952 continue;
10953 code_value += adjust;
10954 sym_value += adjust;
10955 }
10956 dest = opd_entry_value (sym_sec, sym_value,
10957 &code_sec, &code_value);
10958 if (dest != (bfd_vma) -1)
10959 {
10960 destination = dest;
10961 if (fdh != NULL)
10962 {
10963 /* Fixup old ABI sym to point at code
10964 entry. */
10965 hash->elf.root.type = bfd_link_hash_defweak;
10966 hash->elf.root.u.def.section = code_sec;
10967 hash->elf.root.u.def.value = code_value;
10968 }
10969 }
10970 }
10971
10972 /* Determine what (if any) linker stub is needed. */
10973 plt_ent = NULL;
10974 stub_type = ppc_type_of_stub (section, irela, &hash,
10975 &plt_ent, destination);
10976
10977 if (stub_type != ppc_stub_plt_call)
10978 {
10979 /* Check whether we need a TOC adjusting stub.
10980 Since the linker pastes together pieces from
10981 different object files when creating the
10982 _init and _fini functions, it may be that a
10983 call to what looks like a local sym is in
10984 fact a call needing a TOC adjustment. */
10985 if (code_sec != NULL
10986 && code_sec->output_section != NULL
10987 && (htab->stub_group[code_sec->id].toc_off
10988 != htab->stub_group[section->id].toc_off)
10989 && (code_sec->has_toc_reloc
10990 || code_sec->makes_toc_func_call))
10991 stub_type = ppc_stub_long_branch_r2off;
10992 }
10993
10994 if (stub_type == ppc_stub_none)
10995 continue;
10996
10997 /* __tls_get_addr calls might be eliminated. */
10998 if (stub_type != ppc_stub_plt_call
10999 && hash != NULL
11000 && (hash == htab->tls_get_addr
11001 || hash == htab->tls_get_addr_fd)
11002 && section->has_tls_reloc
11003 && irela != internal_relocs)
11004 {
11005 /* Get tls info. */
11006 unsigned char *tls_mask;
11007
11008 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11009 irela - 1, input_bfd))
11010 goto error_ret_free_internal;
11011 if (*tls_mask != 0)
11012 continue;
11013 }
11014
11015 /* Support for grouping stub sections. */
11016 id_sec = htab->stub_group[section->id].link_sec;
11017
11018 /* Get the name of this stub. */
11019 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11020 if (!stub_name)
11021 goto error_ret_free_internal;
11022
11023 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11024 stub_name, FALSE, FALSE);
11025 if (stub_entry != NULL)
11026 {
11027 /* The proper stub has already been created. */
11028 free (stub_name);
11029 continue;
11030 }
11031
11032 stub_entry = ppc_add_stub (stub_name, section, htab);
11033 if (stub_entry == NULL)
11034 {
11035 free (stub_name);
11036 error_ret_free_internal:
11037 if (elf_section_data (section)->relocs == NULL)
11038 free (internal_relocs);
11039 error_ret_free_local:
11040 if (local_syms != NULL
11041 && (symtab_hdr->contents
11042 != (unsigned char *) local_syms))
11043 free (local_syms);
11044 return FALSE;
11045 }
11046
11047 stub_entry->stub_type = stub_type;
11048 if (stub_type != ppc_stub_plt_call)
11049 {
11050 stub_entry->target_value = code_value;
11051 stub_entry->target_section = code_sec;
11052 }
11053 else
11054 {
11055 stub_entry->target_value = sym_value;
11056 stub_entry->target_section = sym_sec;
11057 }
11058 stub_entry->h = hash;
11059 stub_entry->plt_ent = plt_ent;
11060 stub_entry->addend = irela->r_addend;
11061
11062 if (stub_entry->h != NULL)
11063 htab->stub_globals += 1;
11064 }
11065
11066 /* We're done with the internal relocs, free them. */
11067 if (elf_section_data (section)->relocs != internal_relocs)
11068 free (internal_relocs);
11069 }
11070
11071 if (local_syms != NULL
11072 && symtab_hdr->contents != (unsigned char *) local_syms)
11073 {
11074 if (!info->keep_memory)
11075 free (local_syms);
11076 else
11077 symtab_hdr->contents = (unsigned char *) local_syms;
11078 }
11079 }
11080
11081 /* We may have added some stubs. Find out the new size of the
11082 stub sections. */
11083 for (stub_sec = htab->stub_bfd->sections;
11084 stub_sec != NULL;
11085 stub_sec = stub_sec->next)
11086 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11087 {
11088 stub_sec->rawsize = stub_sec->size;
11089 stub_sec->size = 0;
11090 stub_sec->reloc_count = 0;
11091 stub_sec->flags &= ~SEC_RELOC;
11092 }
11093
11094 htab->brlt->size = 0;
11095 htab->brlt->reloc_count = 0;
11096 htab->brlt->flags &= ~SEC_RELOC;
11097 if (htab->relbrlt != NULL)
11098 htab->relbrlt->size = 0;
11099
11100 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11101
11102 if (info->emitrelocations
11103 && htab->glink != NULL && htab->glink->size != 0)
11104 {
11105 htab->glink->reloc_count = 1;
11106 htab->glink->flags |= SEC_RELOC;
11107 }
11108
11109 for (stub_sec = htab->stub_bfd->sections;
11110 stub_sec != NULL;
11111 stub_sec = stub_sec->next)
11112 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11113 && stub_sec->rawsize != stub_sec->size)
11114 break;
11115
11116 /* Exit from this loop when no stubs have been added, and no stubs
11117 have changed size. */
11118 if (stub_sec == NULL)
11119 break;
11120
11121 /* Ask the linker to do its stuff. */
11122 (*htab->layout_sections_again) ();
11123 }
11124
11125 /* It would be nice to strip htab->brlt from the output if the
11126 section is empty, but it's too late. If we strip sections here,
11127 the dynamic symbol table is corrupted since the section symbol
11128 for the stripped section isn't written. */
11129
11130 return TRUE;
11131 }
11132
11133 /* Called after we have determined section placement. If sections
11134 move, we'll be called again. Provide a value for TOCstart. */
11135
11136 bfd_vma
11137 ppc64_elf_toc (bfd *obfd)
11138 {
11139 asection *s;
11140 bfd_vma TOCstart;
11141
11142 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11143 order. The TOC starts where the first of these sections starts. */
11144 s = bfd_get_section_by_name (obfd, ".got");
11145 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11146 s = bfd_get_section_by_name (obfd, ".toc");
11147 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11148 s = bfd_get_section_by_name (obfd, ".tocbss");
11149 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11150 s = bfd_get_section_by_name (obfd, ".plt");
11151 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11152 {
11153 /* This may happen for
11154 o references to TOC base (SYM@toc / TOC[tc0]) without a
11155 .toc directive
11156 o bad linker script
11157 o --gc-sections and empty TOC sections
11158
11159 FIXME: Warn user? */
11160
11161 /* Look for a likely section. We probably won't even be
11162 using TOCstart. */
11163 for (s = obfd->sections; s != NULL; s = s->next)
11164 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11165 | SEC_EXCLUDE))
11166 == (SEC_ALLOC | SEC_SMALL_DATA))
11167 break;
11168 if (s == NULL)
11169 for (s = obfd->sections; s != NULL; s = s->next)
11170 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11171 == (SEC_ALLOC | SEC_SMALL_DATA))
11172 break;
11173 if (s == NULL)
11174 for (s = obfd->sections; s != NULL; s = s->next)
11175 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11176 == SEC_ALLOC)
11177 break;
11178 if (s == NULL)
11179 for (s = obfd->sections; s != NULL; s = s->next)
11180 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11181 break;
11182 }
11183
11184 TOCstart = 0;
11185 if (s != NULL)
11186 TOCstart = s->output_section->vma + s->output_offset;
11187
11188 return TOCstart;
11189 }
11190
11191 /* Build all the stubs associated with the current output file.
11192 The stubs are kept in a hash table attached to the main linker
11193 hash table. This function is called via gldelf64ppc_finish. */
11194
11195 bfd_boolean
11196 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11197 struct bfd_link_info *info,
11198 char **stats)
11199 {
11200 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11201 asection *stub_sec;
11202 bfd_byte *p;
11203 int stub_sec_count = 0;
11204
11205 if (htab == NULL)
11206 return FALSE;
11207
11208 htab->emit_stub_syms = emit_stub_syms;
11209
11210 /* Allocate memory to hold the linker stubs. */
11211 for (stub_sec = htab->stub_bfd->sections;
11212 stub_sec != NULL;
11213 stub_sec = stub_sec->next)
11214 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11215 && stub_sec->size != 0)
11216 {
11217 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11218 if (stub_sec->contents == NULL)
11219 return FALSE;
11220 /* We want to check that built size is the same as calculated
11221 size. rawsize is a convenient location to use. */
11222 stub_sec->rawsize = stub_sec->size;
11223 stub_sec->size = 0;
11224 }
11225
11226 if (htab->glink != NULL && htab->glink->size != 0)
11227 {
11228 unsigned int indx;
11229 bfd_vma plt0;
11230
11231 /* Build the .glink plt call stub. */
11232 if (htab->emit_stub_syms)
11233 {
11234 struct elf_link_hash_entry *h;
11235 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11236 TRUE, FALSE, FALSE);
11237 if (h == NULL)
11238 return FALSE;
11239 if (h->root.type == bfd_link_hash_new)
11240 {
11241 h->root.type = bfd_link_hash_defined;
11242 h->root.u.def.section = htab->glink;
11243 h->root.u.def.value = 8;
11244 h->ref_regular = 1;
11245 h->def_regular = 1;
11246 h->ref_regular_nonweak = 1;
11247 h->forced_local = 1;
11248 h->non_elf = 0;
11249 }
11250 }
11251 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11252 if (info->emitrelocations)
11253 {
11254 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11255 if (r == NULL)
11256 return FALSE;
11257 r->r_offset = (htab->glink->output_offset
11258 + htab->glink->output_section->vma);
11259 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11260 r->r_addend = plt0;
11261 }
11262 p = htab->glink->contents;
11263 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11264 bfd_put_64 (htab->glink->owner, plt0, p);
11265 p += 8;
11266 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11267 p += 4;
11268 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11269 p += 4;
11270 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11271 p += 4;
11272 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11273 p += 4;
11274 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11275 p += 4;
11276 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11277 p += 4;
11278 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11279 p += 4;
11280 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11281 p += 4;
11282 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11283 p += 4;
11284 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11285 p += 4;
11286 bfd_put_32 (htab->glink->owner, BCTR, p);
11287 p += 4;
11288 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11289 {
11290 bfd_put_32 (htab->glink->owner, NOP, p);
11291 p += 4;
11292 }
11293
11294 /* Build the .glink lazy link call stubs. */
11295 indx = 0;
11296 while (p < htab->glink->contents + htab->glink->size)
11297 {
11298 if (indx < 0x8000)
11299 {
11300 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11301 p += 4;
11302 }
11303 else
11304 {
11305 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11306 p += 4;
11307 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11308 p += 4;
11309 }
11310 bfd_put_32 (htab->glink->owner,
11311 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11312 indx++;
11313 p += 4;
11314 }
11315 htab->glink->rawsize = p - htab->glink->contents;
11316 }
11317
11318 if (htab->brlt->size != 0)
11319 {
11320 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11321 htab->brlt->size);
11322 if (htab->brlt->contents == NULL)
11323 return FALSE;
11324 }
11325 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11326 {
11327 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11328 htab->relbrlt->size);
11329 if (htab->relbrlt->contents == NULL)
11330 return FALSE;
11331 }
11332
11333 /* Build the stubs as directed by the stub hash table. */
11334 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11335
11336 if (htab->relbrlt != NULL)
11337 htab->relbrlt->reloc_count = 0;
11338
11339 for (stub_sec = htab->stub_bfd->sections;
11340 stub_sec != NULL;
11341 stub_sec = stub_sec->next)
11342 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11343 {
11344 stub_sec_count += 1;
11345 if (stub_sec->rawsize != stub_sec->size)
11346 break;
11347 }
11348
11349 if (stub_sec != NULL
11350 || htab->glink->rawsize != htab->glink->size)
11351 {
11352 htab->stub_error = TRUE;
11353 (*_bfd_error_handler) (_("stubs don't match calculated size"));
11354 }
11355
11356 if (htab->stub_error)
11357 return FALSE;
11358
11359 if (stats != NULL)
11360 {
11361 *stats = bfd_malloc (500);
11362 if (*stats == NULL)
11363 return FALSE;
11364
11365 sprintf (*stats, _("linker stubs in %u group%s\n"
11366 " branch %lu\n"
11367 " toc adjust %lu\n"
11368 " long branch %lu\n"
11369 " long toc adj %lu\n"
11370 " plt call %lu"),
11371 stub_sec_count,
11372 stub_sec_count == 1 ? "" : "s",
11373 htab->stub_count[ppc_stub_long_branch - 1],
11374 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11375 htab->stub_count[ppc_stub_plt_branch - 1],
11376 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11377 htab->stub_count[ppc_stub_plt_call - 1]);
11378 }
11379 return TRUE;
11380 }
11381
11382 /* This function undoes the changes made by add_symbol_adjust. */
11383
11384 static bfd_boolean
11385 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11386 {
11387 struct ppc_link_hash_entry *eh;
11388
11389 if (h->root.type == bfd_link_hash_indirect)
11390 return TRUE;
11391
11392 if (h->root.type == bfd_link_hash_warning)
11393 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11394
11395 eh = (struct ppc_link_hash_entry *) h;
11396 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11397 return TRUE;
11398
11399 eh->elf.root.type = bfd_link_hash_undefined;
11400 return TRUE;
11401 }
11402
11403 void
11404 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11405 {
11406 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11407
11408 if (htab != NULL)
11409 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11410 }
11411
11412 /* What to do when ld finds relocations against symbols defined in
11413 discarded sections. */
11414
11415 static unsigned int
11416 ppc64_elf_action_discarded (asection *sec)
11417 {
11418 if (strcmp (".opd", sec->name) == 0)
11419 return 0;
11420
11421 if (strcmp (".toc", sec->name) == 0)
11422 return 0;
11423
11424 if (strcmp (".toc1", sec->name) == 0)
11425 return 0;
11426
11427 return _bfd_elf_default_action_discarded (sec);
11428 }
11429
11430 /* REL points to a low-part reloc on a largetoc instruction sequence.
11431 Find the matching high-part reloc instruction and verify that it
11432 is addis REG,x,imm. If so, set *REG to x and return a pointer to
11433 the high-part reloc. */
11434
11435 static const Elf_Internal_Rela *
11436 ha_reloc_match (const Elf_Internal_Rela *relocs,
11437 const Elf_Internal_Rela *rel,
11438 unsigned int *reg,
11439 bfd_boolean match_addend,
11440 const bfd *input_bfd,
11441 const bfd_byte *contents)
11442 {
11443 enum elf_ppc64_reloc_type r_type, r_type_ha;
11444 bfd_vma r_info_ha, r_addend;
11445
11446 r_type = ELF64_R_TYPE (rel->r_info);
11447 switch (r_type)
11448 {
11449 case R_PPC64_GOT_TLSLD16_LO:
11450 case R_PPC64_GOT_TLSGD16_LO:
11451 case R_PPC64_GOT_TPREL16_LO_DS:
11452 case R_PPC64_GOT_DTPREL16_LO_DS:
11453 case R_PPC64_GOT16_LO:
11454 case R_PPC64_TOC16_LO:
11455 r_type_ha = r_type + 2;
11456 break;
11457 case R_PPC64_GOT16_LO_DS:
11458 r_type_ha = R_PPC64_GOT16_HA;
11459 break;
11460 case R_PPC64_TOC16_LO_DS:
11461 r_type_ha = R_PPC64_TOC16_HA;
11462 break;
11463 default:
11464 abort ();
11465 }
11466 r_info_ha = ELF64_R_INFO (ELF64_R_SYM (rel->r_info), r_type_ha);
11467 r_addend = rel->r_addend;
11468
11469 while (--rel >= relocs)
11470 if (rel->r_info == r_info_ha
11471 && (!match_addend
11472 || rel->r_addend == r_addend))
11473 {
11474 const bfd_byte *p = contents + (rel->r_offset & ~3);
11475 unsigned int insn = bfd_get_32 (input_bfd, p);
11476 if ((insn & (0x3f << 26)) == (15u << 26) /* addis rt,x,imm */
11477 && (insn & (0x1f << 21)) == (*reg << 21))
11478 {
11479 *reg = (insn >> 16) & 0x1f;
11480 return rel;
11481 }
11482 break;
11483 }
11484 return NULL;
11485 }
11486
11487 /* The RELOCATE_SECTION function is called by the ELF backend linker
11488 to handle the relocations for a section.
11489
11490 The relocs are always passed as Rela structures; if the section
11491 actually uses Rel structures, the r_addend field will always be
11492 zero.
11493
11494 This function is responsible for adjust the section contents as
11495 necessary, and (if using Rela relocs and generating a
11496 relocatable output file) adjusting the reloc addend as
11497 necessary.
11498
11499 This function does not have to worry about setting the reloc
11500 address or the reloc symbol index.
11501
11502 LOCAL_SYMS is a pointer to the swapped in local symbols.
11503
11504 LOCAL_SECTIONS is an array giving the section in the input file
11505 corresponding to the st_shndx field of each local symbol.
11506
11507 The global hash table entry for the global symbols can be found
11508 via elf_sym_hashes (input_bfd).
11509
11510 When generating relocatable output, this function must handle
11511 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11512 going to be the section symbol corresponding to the output
11513 section, which means that the addend must be adjusted
11514 accordingly. */
11515
11516 static bfd_boolean
11517 ppc64_elf_relocate_section (bfd *output_bfd,
11518 struct bfd_link_info *info,
11519 bfd *input_bfd,
11520 asection *input_section,
11521 bfd_byte *contents,
11522 Elf_Internal_Rela *relocs,
11523 Elf_Internal_Sym *local_syms,
11524 asection **local_sections)
11525 {
11526 struct ppc_link_hash_table *htab;
11527 Elf_Internal_Shdr *symtab_hdr;
11528 struct elf_link_hash_entry **sym_hashes;
11529 Elf_Internal_Rela *rel;
11530 Elf_Internal_Rela *relend;
11531 Elf_Internal_Rela outrel;
11532 bfd_byte *loc;
11533 struct got_entry **local_got_ents;
11534 unsigned char *ha_opt;
11535 bfd_vma TOCstart;
11536 bfd_boolean no_ha_opt;
11537 bfd_boolean ret = TRUE;
11538 bfd_boolean is_opd;
11539 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11540 bfd_boolean is_power4 = FALSE;
11541 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11542
11543 /* Initialize howto table if needed. */
11544 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11545 ppc_howto_init ();
11546
11547 htab = ppc_hash_table (info);
11548 if (htab == NULL)
11549 return FALSE;
11550
11551 /* Don't relocate stub sections. */
11552 if (input_section->owner == htab->stub_bfd)
11553 return TRUE;
11554
11555 BFD_ASSERT (is_ppc64_elf (input_bfd));
11556
11557 local_got_ents = elf_local_got_ents (input_bfd);
11558 TOCstart = elf_gp (output_bfd);
11559 symtab_hdr = &elf_symtab_hdr (input_bfd);
11560 sym_hashes = elf_sym_hashes (input_bfd);
11561 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11562 ha_opt = NULL;
11563 no_ha_opt = FALSE;
11564
11565 rel = relocs;
11566 relend = relocs + input_section->reloc_count;
11567 for (; rel < relend; rel++)
11568 {
11569 enum elf_ppc64_reloc_type r_type;
11570 bfd_vma addend, orig_addend;
11571 bfd_reloc_status_type r;
11572 Elf_Internal_Sym *sym;
11573 asection *sec;
11574 struct elf_link_hash_entry *h_elf;
11575 struct ppc_link_hash_entry *h;
11576 struct ppc_link_hash_entry *fdh;
11577 const char *sym_name;
11578 unsigned long r_symndx, toc_symndx;
11579 bfd_vma toc_addend;
11580 unsigned char tls_mask, tls_gd, tls_type;
11581 unsigned char sym_type;
11582 bfd_vma relocation;
11583 bfd_boolean unresolved_reloc;
11584 bfd_boolean warned;
11585 unsigned int insn;
11586 bfd_vma mask;
11587 struct ppc_stub_hash_entry *stub_entry;
11588 bfd_vma max_br_offset;
11589 bfd_vma from;
11590
11591 r_type = ELF64_R_TYPE (rel->r_info);
11592 r_symndx = ELF64_R_SYM (rel->r_info);
11593
11594 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11595 symbol of the previous ADDR64 reloc. The symbol gives us the
11596 proper TOC base to use. */
11597 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11598 && rel != relocs
11599 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11600 && is_opd)
11601 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11602
11603 sym = NULL;
11604 sec = NULL;
11605 h_elf = NULL;
11606 sym_name = NULL;
11607 unresolved_reloc = FALSE;
11608 warned = FALSE;
11609 orig_addend = rel->r_addend;
11610
11611 if (r_symndx < symtab_hdr->sh_info)
11612 {
11613 /* It's a local symbol. */
11614 struct _opd_sec_data *opd;
11615
11616 sym = local_syms + r_symndx;
11617 sec = local_sections[r_symndx];
11618 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11619 sym_type = ELF64_ST_TYPE (sym->st_info);
11620 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11621 opd = get_opd_info (sec);
11622 if (opd != NULL && opd->adjust != NULL)
11623 {
11624 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11625 if (adjust == -1)
11626 relocation = 0;
11627 else
11628 {
11629 /* If this is a relocation against the opd section sym
11630 and we have edited .opd, adjust the reloc addend so
11631 that ld -r and ld --emit-relocs output is correct.
11632 If it is a reloc against some other .opd symbol,
11633 then the symbol value will be adjusted later. */
11634 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11635 rel->r_addend += adjust;
11636 else
11637 relocation += adjust;
11638 }
11639 }
11640 }
11641 else
11642 {
11643 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11644 r_symndx, symtab_hdr, sym_hashes,
11645 h_elf, sec, relocation,
11646 unresolved_reloc, warned);
11647 sym_name = h_elf->root.root.string;
11648 sym_type = h_elf->type;
11649 }
11650 h = (struct ppc_link_hash_entry *) h_elf;
11651
11652 if (sec != NULL && elf_discarded_section (sec))
11653 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
11654 rel, relend,
11655 ppc64_elf_howto_table[r_type],
11656 contents);
11657
11658 if (info->relocatable)
11659 continue;
11660
11661 /* TLS optimizations. Replace instruction sequences and relocs
11662 based on information we collected in tls_optimize. We edit
11663 RELOCS so that --emit-relocs will output something sensible
11664 for the final instruction stream. */
11665 tls_mask = 0;
11666 tls_gd = 0;
11667 toc_symndx = 0;
11668 if (h != NULL)
11669 tls_mask = h->tls_mask;
11670 else if (local_got_ents != NULL)
11671 {
11672 struct plt_entry **local_plt = (struct plt_entry **)
11673 (local_got_ents + symtab_hdr->sh_info);
11674 unsigned char *lgot_masks = (unsigned char *)
11675 (local_plt + symtab_hdr->sh_info);
11676 tls_mask = lgot_masks[r_symndx];
11677 }
11678 if (tls_mask == 0
11679 && (r_type == R_PPC64_TLS
11680 || r_type == R_PPC64_TLSGD
11681 || r_type == R_PPC64_TLSLD))
11682 {
11683 /* Check for toc tls entries. */
11684 unsigned char *toc_tls;
11685
11686 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11687 &local_syms, rel, input_bfd))
11688 return FALSE;
11689
11690 if (toc_tls)
11691 tls_mask = *toc_tls;
11692 }
11693
11694 /* Check that tls relocs are used with tls syms, and non-tls
11695 relocs are used with non-tls syms. */
11696 if (r_symndx != STN_UNDEF
11697 && r_type != R_PPC64_NONE
11698 && (h == NULL
11699 || h->elf.root.type == bfd_link_hash_defined
11700 || h->elf.root.type == bfd_link_hash_defweak)
11701 && (IS_PPC64_TLS_RELOC (r_type)
11702 != (sym_type == STT_TLS
11703 || (sym_type == STT_SECTION
11704 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11705 {
11706 if (tls_mask != 0
11707 && (r_type == R_PPC64_TLS
11708 || r_type == R_PPC64_TLSGD
11709 || r_type == R_PPC64_TLSLD))
11710 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11711 ;
11712 else
11713 (*_bfd_error_handler)
11714 (!IS_PPC64_TLS_RELOC (r_type)
11715 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11716 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
11717 input_bfd,
11718 input_section,
11719 (long) rel->r_offset,
11720 ppc64_elf_howto_table[r_type]->name,
11721 sym_name);
11722 }
11723
11724 /* Ensure reloc mapping code below stays sane. */
11725 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11726 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11727 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11728 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11729 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11730 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11731 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11732 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11733 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11734 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11735 abort ();
11736
11737 switch (r_type)
11738 {
11739 default:
11740 break;
11741
11742 case R_PPC64_LO_DS_OPT:
11743 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11744 if ((insn & (0x3f << 26)) != 58u << 26)
11745 abort ();
11746 insn += (14u << 26) - (58u << 26);
11747 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11748 r_type = R_PPC64_TOC16_LO;
11749 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11750 break;
11751
11752 case R_PPC64_TOC16:
11753 case R_PPC64_TOC16_LO:
11754 case R_PPC64_TOC16_DS:
11755 case R_PPC64_TOC16_LO_DS:
11756 {
11757 /* Check for toc tls entries. */
11758 unsigned char *toc_tls;
11759 int retval;
11760
11761 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11762 &local_syms, rel, input_bfd);
11763 if (retval == 0)
11764 return FALSE;
11765
11766 if (toc_tls)
11767 {
11768 tls_mask = *toc_tls;
11769 if (r_type == R_PPC64_TOC16_DS
11770 || r_type == R_PPC64_TOC16_LO_DS)
11771 {
11772 if (tls_mask != 0
11773 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
11774 goto toctprel;
11775 }
11776 else
11777 {
11778 /* If we found a GD reloc pair, then we might be
11779 doing a GD->IE transition. */
11780 if (retval == 2)
11781 {
11782 tls_gd = TLS_TPRELGD;
11783 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11784 goto tls_ldgd_opt;
11785 }
11786 else if (retval == 3)
11787 {
11788 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11789 goto tls_ldgd_opt;
11790 }
11791 }
11792 }
11793 }
11794 break;
11795
11796 case R_PPC64_GOT_TPREL16_HI:
11797 case R_PPC64_GOT_TPREL16_HA:
11798 if (tls_mask != 0
11799 && (tls_mask & TLS_TPREL) == 0)
11800 {
11801 rel->r_offset -= d_offset;
11802 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11803 r_type = R_PPC64_NONE;
11804 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11805 }
11806 break;
11807
11808 case R_PPC64_GOT_TPREL16_DS:
11809 case R_PPC64_GOT_TPREL16_LO_DS:
11810 if (tls_mask != 0
11811 && (tls_mask & TLS_TPREL) == 0)
11812 {
11813 toctprel:
11814 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11815 insn &= 31 << 21;
11816 insn |= 0x3c0d0000; /* addis 0,13,0 */
11817 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11818 r_type = R_PPC64_TPREL16_HA;
11819 if (toc_symndx != 0)
11820 {
11821 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11822 rel->r_addend = toc_addend;
11823 /* We changed the symbol. Start over in order to
11824 get h, sym, sec etc. right. */
11825 rel--;
11826 continue;
11827 }
11828 else
11829 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11830 }
11831 break;
11832
11833 case R_PPC64_TLS:
11834 if (tls_mask != 0
11835 && (tls_mask & TLS_TPREL) == 0)
11836 {
11837 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11838 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11839 if (insn == 0)
11840 abort ();
11841 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11842 /* Was PPC64_TLS which sits on insn boundary, now
11843 PPC64_TPREL16_LO which is at low-order half-word. */
11844 rel->r_offset += d_offset;
11845 r_type = R_PPC64_TPREL16_LO;
11846 if (toc_symndx != 0)
11847 {
11848 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11849 rel->r_addend = toc_addend;
11850 /* We changed the symbol. Start over in order to
11851 get h, sym, sec etc. right. */
11852 rel--;
11853 continue;
11854 }
11855 else
11856 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11857 }
11858 break;
11859
11860 case R_PPC64_GOT_TLSGD16_HI:
11861 case R_PPC64_GOT_TLSGD16_HA:
11862 tls_gd = TLS_TPRELGD;
11863 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11864 goto tls_gdld_hi;
11865 break;
11866
11867 case R_PPC64_GOT_TLSLD16_HI:
11868 case R_PPC64_GOT_TLSLD16_HA:
11869 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11870 {
11871 tls_gdld_hi:
11872 if ((tls_mask & tls_gd) != 0)
11873 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11874 + R_PPC64_GOT_TPREL16_DS);
11875 else
11876 {
11877 rel->r_offset -= d_offset;
11878 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11879 r_type = R_PPC64_NONE;
11880 }
11881 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11882 }
11883 break;
11884
11885 case R_PPC64_GOT_TLSGD16:
11886 case R_PPC64_GOT_TLSGD16_LO:
11887 tls_gd = TLS_TPRELGD;
11888 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11889 goto tls_ldgd_opt;
11890 break;
11891
11892 case R_PPC64_GOT_TLSLD16:
11893 case R_PPC64_GOT_TLSLD16_LO:
11894 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11895 {
11896 unsigned int insn1, insn2, insn3;
11897 bfd_vma offset;
11898
11899 tls_ldgd_opt:
11900 offset = (bfd_vma) -1;
11901 /* If not using the newer R_PPC64_TLSGD/LD to mark
11902 __tls_get_addr calls, we must trust that the call
11903 stays with its arg setup insns, ie. that the next
11904 reloc is the __tls_get_addr call associated with
11905 the current reloc. Edit both insns. */
11906 if (input_section->has_tls_get_addr_call
11907 && rel + 1 < relend
11908 && branch_reloc_hash_match (input_bfd, rel + 1,
11909 htab->tls_get_addr,
11910 htab->tls_get_addr_fd))
11911 offset = rel[1].r_offset;
11912 if ((tls_mask & tls_gd) != 0)
11913 {
11914 /* IE */
11915 insn1 = bfd_get_32 (output_bfd,
11916 contents + rel->r_offset - d_offset);
11917 insn1 &= (1 << 26) - (1 << 2);
11918 insn1 |= 58 << 26; /* ld */
11919 insn2 = 0x7c636a14; /* add 3,3,13 */
11920 if (offset != (bfd_vma) -1)
11921 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11922 if ((tls_mask & TLS_EXPLICIT) == 0)
11923 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11924 + R_PPC64_GOT_TPREL16_DS);
11925 else
11926 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11927 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11928 }
11929 else
11930 {
11931 /* LE */
11932 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11933 insn2 = 0x38630000; /* addi 3,3,0 */
11934 if (tls_gd == 0)
11935 {
11936 /* Was an LD reloc. */
11937 if (toc_symndx)
11938 sec = local_sections[toc_symndx];
11939 for (r_symndx = 0;
11940 r_symndx < symtab_hdr->sh_info;
11941 r_symndx++)
11942 if (local_sections[r_symndx] == sec)
11943 break;
11944 if (r_symndx >= symtab_hdr->sh_info)
11945 r_symndx = STN_UNDEF;
11946 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11947 if (r_symndx != STN_UNDEF)
11948 rel->r_addend -= (local_syms[r_symndx].st_value
11949 + sec->output_offset
11950 + sec->output_section->vma);
11951 }
11952 else if (toc_symndx != 0)
11953 {
11954 r_symndx = toc_symndx;
11955 rel->r_addend = toc_addend;
11956 }
11957 r_type = R_PPC64_TPREL16_HA;
11958 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11959 if (offset != (bfd_vma) -1)
11960 {
11961 rel[1].r_info = ELF64_R_INFO (r_symndx,
11962 R_PPC64_TPREL16_LO);
11963 rel[1].r_offset = offset + d_offset;
11964 rel[1].r_addend = rel->r_addend;
11965 }
11966 }
11967 bfd_put_32 (output_bfd, insn1,
11968 contents + rel->r_offset - d_offset);
11969 if (offset != (bfd_vma) -1)
11970 {
11971 insn3 = bfd_get_32 (output_bfd,
11972 contents + offset + 4);
11973 if (insn3 == NOP
11974 || insn3 == CROR_151515 || insn3 == CROR_313131)
11975 {
11976 rel[1].r_offset += 4;
11977 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11978 insn2 = NOP;
11979 }
11980 bfd_put_32 (output_bfd, insn2, contents + offset);
11981 }
11982 if ((tls_mask & tls_gd) == 0
11983 && (tls_gd == 0 || toc_symndx != 0))
11984 {
11985 /* We changed the symbol. Start over in order
11986 to get h, sym, sec etc. right. */
11987 rel--;
11988 continue;
11989 }
11990 }
11991 break;
11992
11993 case R_PPC64_TLSGD:
11994 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11995 {
11996 unsigned int insn2, insn3;
11997 bfd_vma offset = rel->r_offset;
11998
11999 if ((tls_mask & TLS_TPRELGD) != 0)
12000 {
12001 /* IE */
12002 r_type = R_PPC64_NONE;
12003 insn2 = 0x7c636a14; /* add 3,3,13 */
12004 }
12005 else
12006 {
12007 /* LE */
12008 if (toc_symndx != 0)
12009 {
12010 r_symndx = toc_symndx;
12011 rel->r_addend = toc_addend;
12012 }
12013 r_type = R_PPC64_TPREL16_LO;
12014 rel->r_offset = offset + d_offset;
12015 insn2 = 0x38630000; /* addi 3,3,0 */
12016 }
12017 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12018 /* Zap the reloc on the _tls_get_addr call too. */
12019 BFD_ASSERT (offset == rel[1].r_offset);
12020 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12021 insn3 = bfd_get_32 (output_bfd,
12022 contents + offset + 4);
12023 if (insn3 == NOP
12024 || insn3 == CROR_151515 || insn3 == CROR_313131)
12025 {
12026 rel->r_offset += 4;
12027 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12028 insn2 = NOP;
12029 }
12030 bfd_put_32 (output_bfd, insn2, contents + offset);
12031 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12032 {
12033 rel--;
12034 continue;
12035 }
12036 }
12037 break;
12038
12039 case R_PPC64_TLSLD:
12040 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12041 {
12042 unsigned int insn2, insn3;
12043 bfd_vma offset = rel->r_offset;
12044
12045 if (toc_symndx)
12046 sec = local_sections[toc_symndx];
12047 for (r_symndx = 0;
12048 r_symndx < symtab_hdr->sh_info;
12049 r_symndx++)
12050 if (local_sections[r_symndx] == sec)
12051 break;
12052 if (r_symndx >= symtab_hdr->sh_info)
12053 r_symndx = STN_UNDEF;
12054 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12055 if (r_symndx != STN_UNDEF)
12056 rel->r_addend -= (local_syms[r_symndx].st_value
12057 + sec->output_offset
12058 + sec->output_section->vma);
12059
12060 r_type = R_PPC64_TPREL16_LO;
12061 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12062 rel->r_offset = offset + d_offset;
12063 /* Zap the reloc on the _tls_get_addr call too. */
12064 BFD_ASSERT (offset == rel[1].r_offset);
12065 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12066 insn2 = 0x38630000; /* addi 3,3,0 */
12067 insn3 = bfd_get_32 (output_bfd,
12068 contents + offset + 4);
12069 if (insn3 == NOP
12070 || insn3 == CROR_151515 || insn3 == CROR_313131)
12071 {
12072 rel->r_offset += 4;
12073 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12074 insn2 = NOP;
12075 }
12076 bfd_put_32 (output_bfd, insn2, contents + offset);
12077 rel--;
12078 continue;
12079 }
12080 break;
12081
12082 case R_PPC64_DTPMOD64:
12083 if (rel + 1 < relend
12084 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12085 && rel[1].r_offset == rel->r_offset + 8)
12086 {
12087 if ((tls_mask & TLS_GD) == 0)
12088 {
12089 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12090 if ((tls_mask & TLS_TPRELGD) != 0)
12091 r_type = R_PPC64_TPREL64;
12092 else
12093 {
12094 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12095 r_type = R_PPC64_NONE;
12096 }
12097 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12098 }
12099 }
12100 else
12101 {
12102 if ((tls_mask & TLS_LD) == 0)
12103 {
12104 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12105 r_type = R_PPC64_NONE;
12106 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12107 }
12108 }
12109 break;
12110
12111 case R_PPC64_TPREL64:
12112 if ((tls_mask & TLS_TPREL) == 0)
12113 {
12114 r_type = R_PPC64_NONE;
12115 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12116 }
12117 break;
12118 }
12119
12120 /* Handle other relocations that tweak non-addend part of insn. */
12121 insn = 0;
12122 max_br_offset = 1 << 25;
12123 addend = rel->r_addend;
12124 switch (r_type)
12125 {
12126 default:
12127 break;
12128
12129 /* Branch taken prediction relocations. */
12130 case R_PPC64_ADDR14_BRTAKEN:
12131 case R_PPC64_REL14_BRTAKEN:
12132 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12133 /* Fall thru. */
12134
12135 /* Branch not taken prediction relocations. */
12136 case R_PPC64_ADDR14_BRNTAKEN:
12137 case R_PPC64_REL14_BRNTAKEN:
12138 insn |= bfd_get_32 (output_bfd,
12139 contents + rel->r_offset) & ~(0x01 << 21);
12140 /* Fall thru. */
12141
12142 case R_PPC64_REL14:
12143 max_br_offset = 1 << 15;
12144 /* Fall thru. */
12145
12146 case R_PPC64_REL24:
12147 /* Calls to functions with a different TOC, such as calls to
12148 shared objects, need to alter the TOC pointer. This is
12149 done using a linkage stub. A REL24 branching to these
12150 linkage stubs needs to be followed by a nop, as the nop
12151 will be replaced with an instruction to restore the TOC
12152 base pointer. */
12153 fdh = h;
12154 if (h != NULL
12155 && h->oh != NULL
12156 && h->oh->is_func_descriptor)
12157 fdh = ppc_follow_link (h->oh);
12158 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12159 if (stub_entry != NULL
12160 && (stub_entry->stub_type == ppc_stub_plt_call
12161 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12162 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12163 {
12164 bfd_boolean can_plt_call = FALSE;
12165
12166 if (rel->r_offset + 8 <= input_section->size)
12167 {
12168 unsigned long nop;
12169 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12170 if (nop == NOP
12171 || nop == CROR_151515 || nop == CROR_313131)
12172 {
12173 if (h != NULL
12174 && (h == htab->tls_get_addr_fd
12175 || h == htab->tls_get_addr)
12176 && !htab->no_tls_get_addr_opt)
12177 {
12178 /* Special stub used, leave nop alone. */
12179 }
12180 else
12181 bfd_put_32 (input_bfd, LD_R2_40R1,
12182 contents + rel->r_offset + 4);
12183 can_plt_call = TRUE;
12184 }
12185 }
12186
12187 if (!can_plt_call)
12188 {
12189 if (stub_entry->stub_type == ppc_stub_plt_call)
12190 {
12191 /* If this is a plain branch rather than a branch
12192 and link, don't require a nop. However, don't
12193 allow tail calls in a shared library as they
12194 will result in r2 being corrupted. */
12195 unsigned long br;
12196 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12197 if (info->executable && (br & 1) == 0)
12198 can_plt_call = TRUE;
12199 else
12200 stub_entry = NULL;
12201 }
12202 else if (h != NULL
12203 && strcmp (h->elf.root.root.string,
12204 ".__libc_start_main") == 0)
12205 {
12206 /* Allow crt1 branch to go via a toc adjusting stub. */
12207 can_plt_call = TRUE;
12208 }
12209 else
12210 {
12211 if (strcmp (input_section->output_section->name,
12212 ".init") == 0
12213 || strcmp (input_section->output_section->name,
12214 ".fini") == 0)
12215 (*_bfd_error_handler)
12216 (_("%B(%A+0x%lx): automatic multiple TOCs "
12217 "not supported using your crt files; "
12218 "recompile with -mminimal-toc or upgrade gcc"),
12219 input_bfd,
12220 input_section,
12221 (long) rel->r_offset);
12222 else
12223 (*_bfd_error_handler)
12224 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
12225 "does not allow automatic multiple TOCs; "
12226 "recompile with -mminimal-toc or "
12227 "-fno-optimize-sibling-calls, "
12228 "or make `%s' extern"),
12229 input_bfd,
12230 input_section,
12231 (long) rel->r_offset,
12232 sym_name,
12233 sym_name);
12234 bfd_set_error (bfd_error_bad_value);
12235 ret = FALSE;
12236 }
12237 }
12238
12239 if (can_plt_call
12240 && stub_entry->stub_type == ppc_stub_plt_call)
12241 unresolved_reloc = FALSE;
12242 }
12243
12244 if ((stub_entry == NULL
12245 || stub_entry->stub_type == ppc_stub_long_branch
12246 || stub_entry->stub_type == ppc_stub_plt_branch)
12247 && get_opd_info (sec) != NULL)
12248 {
12249 /* The branch destination is the value of the opd entry. */
12250 bfd_vma off = (relocation + addend
12251 - sec->output_section->vma
12252 - sec->output_offset);
12253 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12254 if (dest != (bfd_vma) -1)
12255 {
12256 relocation = dest;
12257 addend = 0;
12258 }
12259 }
12260
12261 /* If the branch is out of reach we ought to have a long
12262 branch stub. */
12263 from = (rel->r_offset
12264 + input_section->output_offset
12265 + input_section->output_section->vma);
12266
12267 if (stub_entry != NULL
12268 && (stub_entry->stub_type == ppc_stub_long_branch
12269 || stub_entry->stub_type == ppc_stub_plt_branch)
12270 && (r_type == R_PPC64_ADDR14_BRTAKEN
12271 || r_type == R_PPC64_ADDR14_BRNTAKEN
12272 || (relocation + addend - from + max_br_offset
12273 < 2 * max_br_offset)))
12274 /* Don't use the stub if this branch is in range. */
12275 stub_entry = NULL;
12276
12277 if (stub_entry != NULL)
12278 {
12279 /* Munge up the value and addend so that we call the stub
12280 rather than the procedure directly. */
12281 relocation = (stub_entry->stub_offset
12282 + stub_entry->stub_sec->output_offset
12283 + stub_entry->stub_sec->output_section->vma);
12284 addend = 0;
12285 }
12286
12287 if (insn != 0)
12288 {
12289 if (is_power4)
12290 {
12291 /* Set 'a' bit. This is 0b00010 in BO field for branch
12292 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12293 for branch on CTR insns (BO == 1a00t or 1a01t). */
12294 if ((insn & (0x14 << 21)) == (0x04 << 21))
12295 insn |= 0x02 << 21;
12296 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12297 insn |= 0x08 << 21;
12298 else
12299 break;
12300 }
12301 else
12302 {
12303 /* Invert 'y' bit if not the default. */
12304 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12305 insn ^= 0x01 << 21;
12306 }
12307
12308 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12309 }
12310
12311 /* NOP out calls to undefined weak functions.
12312 We can thus call a weak function without first
12313 checking whether the function is defined. */
12314 else if (h != NULL
12315 && h->elf.root.type == bfd_link_hash_undefweak
12316 && h->elf.dynindx == -1
12317 && r_type == R_PPC64_REL24
12318 && relocation == 0
12319 && addend == 0)
12320 {
12321 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12322 continue;
12323 }
12324 break;
12325 }
12326
12327 /* Set `addend'. */
12328 tls_type = 0;
12329 switch (r_type)
12330 {
12331 default:
12332 (*_bfd_error_handler)
12333 (_("%B: unknown relocation type %d for symbol %s"),
12334 input_bfd, (int) r_type, sym_name);
12335
12336 bfd_set_error (bfd_error_bad_value);
12337 ret = FALSE;
12338 continue;
12339
12340 case R_PPC64_NONE:
12341 case R_PPC64_TLS:
12342 case R_PPC64_TLSGD:
12343 case R_PPC64_TLSLD:
12344 case R_PPC64_GNU_VTINHERIT:
12345 case R_PPC64_GNU_VTENTRY:
12346 continue;
12347
12348 /* GOT16 relocations. Like an ADDR16 using the symbol's
12349 address in the GOT as relocation value instead of the
12350 symbol's value itself. Also, create a GOT entry for the
12351 symbol and put the symbol value there. */
12352 case R_PPC64_GOT_TLSGD16:
12353 case R_PPC64_GOT_TLSGD16_LO:
12354 case R_PPC64_GOT_TLSGD16_HI:
12355 case R_PPC64_GOT_TLSGD16_HA:
12356 tls_type = TLS_TLS | TLS_GD;
12357 goto dogot;
12358
12359 case R_PPC64_GOT_TLSLD16:
12360 case R_PPC64_GOT_TLSLD16_LO:
12361 case R_PPC64_GOT_TLSLD16_HI:
12362 case R_PPC64_GOT_TLSLD16_HA:
12363 tls_type = TLS_TLS | TLS_LD;
12364 goto dogot;
12365
12366 case R_PPC64_GOT_TPREL16_DS:
12367 case R_PPC64_GOT_TPREL16_LO_DS:
12368 case R_PPC64_GOT_TPREL16_HI:
12369 case R_PPC64_GOT_TPREL16_HA:
12370 tls_type = TLS_TLS | TLS_TPREL;
12371 goto dogot;
12372
12373 case R_PPC64_GOT_DTPREL16_DS:
12374 case R_PPC64_GOT_DTPREL16_LO_DS:
12375 case R_PPC64_GOT_DTPREL16_HI:
12376 case R_PPC64_GOT_DTPREL16_HA:
12377 tls_type = TLS_TLS | TLS_DTPREL;
12378 goto dogot;
12379
12380 case R_PPC64_GOT16:
12381 case R_PPC64_GOT16_LO:
12382 case R_PPC64_GOT16_HI:
12383 case R_PPC64_GOT16_HA:
12384 case R_PPC64_GOT16_DS:
12385 case R_PPC64_GOT16_LO_DS:
12386 dogot:
12387 {
12388 /* Relocation is to the entry for this symbol in the global
12389 offset table. */
12390 asection *got;
12391 bfd_vma *offp;
12392 bfd_vma off;
12393 unsigned long indx = 0;
12394 struct got_entry *ent;
12395
12396 if (tls_type == (TLS_TLS | TLS_LD)
12397 && (h == NULL
12398 || !h->elf.def_dynamic))
12399 ent = ppc64_tlsld_got (input_bfd);
12400 else
12401 {
12402
12403 if (h != NULL)
12404 {
12405 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12406 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12407 &h->elf)
12408 || (info->shared
12409 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
12410 /* This is actually a static link, or it is a
12411 -Bsymbolic link and the symbol is defined
12412 locally, or the symbol was forced to be local
12413 because of a version file. */
12414 ;
12415 else
12416 {
12417 indx = h->elf.dynindx;
12418 unresolved_reloc = FALSE;
12419 }
12420 ent = h->elf.got.glist;
12421 }
12422 else
12423 {
12424 if (local_got_ents == NULL)
12425 abort ();
12426 ent = local_got_ents[r_symndx];
12427 }
12428
12429 for (; ent != NULL; ent = ent->next)
12430 if (ent->addend == orig_addend
12431 && ent->owner == input_bfd
12432 && ent->tls_type == tls_type)
12433 break;
12434 }
12435
12436 if (ent == NULL)
12437 abort ();
12438 if (ent->is_indirect)
12439 ent = ent->got.ent;
12440 offp = &ent->got.offset;
12441 got = ppc64_elf_tdata (ent->owner)->got;
12442 if (got == NULL)
12443 abort ();
12444
12445 /* The offset must always be a multiple of 8. We use the
12446 least significant bit to record whether we have already
12447 processed this entry. */
12448 off = *offp;
12449 if ((off & 1) != 0)
12450 off &= ~1;
12451 else
12452 {
12453 /* Generate relocs for the dynamic linker, except in
12454 the case of TLSLD where we'll use one entry per
12455 module. */
12456 asection *relgot;
12457 bfd_boolean ifunc;
12458
12459 *offp = off | 1;
12460 relgot = NULL;
12461 ifunc = (h != NULL
12462 ? h->elf.type == STT_GNU_IFUNC
12463 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12464 if ((info->shared || indx != 0)
12465 && (h == NULL
12466 || (tls_type == (TLS_TLS | TLS_LD)
12467 && !h->elf.def_dynamic)
12468 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12469 || h->elf.root.type != bfd_link_hash_undefweak))
12470 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12471 else if (ifunc)
12472 relgot = htab->reliplt;
12473 if (relgot != NULL)
12474 {
12475 outrel.r_offset = (got->output_section->vma
12476 + got->output_offset
12477 + off);
12478 outrel.r_addend = addend;
12479 if (tls_type & (TLS_LD | TLS_GD))
12480 {
12481 outrel.r_addend = 0;
12482 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12483 if (tls_type == (TLS_TLS | TLS_GD))
12484 {
12485 loc = relgot->contents;
12486 loc += (relgot->reloc_count++
12487 * sizeof (Elf64_External_Rela));
12488 bfd_elf64_swap_reloca_out (output_bfd,
12489 &outrel, loc);
12490 outrel.r_offset += 8;
12491 outrel.r_addend = addend;
12492 outrel.r_info
12493 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12494 }
12495 }
12496 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12497 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12498 else if (tls_type == (TLS_TLS | TLS_TPREL))
12499 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12500 else if (indx != 0)
12501 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12502 else
12503 {
12504 if (ifunc)
12505 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12506 else
12507 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12508
12509 /* Write the .got section contents for the sake
12510 of prelink. */
12511 loc = got->contents + off;
12512 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12513 loc);
12514 }
12515
12516 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12517 {
12518 outrel.r_addend += relocation;
12519 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12520 outrel.r_addend -= htab->elf.tls_sec->vma;
12521 }
12522 loc = relgot->contents;
12523 loc += (relgot->reloc_count++
12524 * sizeof (Elf64_External_Rela));
12525 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12526 }
12527
12528 /* Init the .got section contents here if we're not
12529 emitting a reloc. */
12530 else
12531 {
12532 relocation += addend;
12533 if (tls_type == (TLS_TLS | TLS_LD))
12534 relocation = 1;
12535 else if (tls_type != 0)
12536 {
12537 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12538 if (tls_type == (TLS_TLS | TLS_TPREL))
12539 relocation += DTP_OFFSET - TP_OFFSET;
12540
12541 if (tls_type == (TLS_TLS | TLS_GD))
12542 {
12543 bfd_put_64 (output_bfd, relocation,
12544 got->contents + off + 8);
12545 relocation = 1;
12546 }
12547 }
12548
12549 bfd_put_64 (output_bfd, relocation,
12550 got->contents + off);
12551 }
12552 }
12553
12554 if (off >= (bfd_vma) -2)
12555 abort ();
12556
12557 relocation = got->output_section->vma + got->output_offset + off;
12558 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12559 }
12560 break;
12561
12562 case R_PPC64_PLT16_HA:
12563 case R_PPC64_PLT16_HI:
12564 case R_PPC64_PLT16_LO:
12565 case R_PPC64_PLT32:
12566 case R_PPC64_PLT64:
12567 /* Relocation is to the entry for this symbol in the
12568 procedure linkage table. */
12569
12570 /* Resolve a PLT reloc against a local symbol directly,
12571 without using the procedure linkage table. */
12572 if (h == NULL)
12573 break;
12574
12575 /* It's possible that we didn't make a PLT entry for this
12576 symbol. This happens when statically linking PIC code,
12577 or when using -Bsymbolic. Go find a match if there is a
12578 PLT entry. */
12579 if (htab->plt != NULL)
12580 {
12581 struct plt_entry *ent;
12582 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12583 if (ent->addend == orig_addend
12584 && ent->plt.offset != (bfd_vma) -1)
12585 {
12586 relocation = (htab->plt->output_section->vma
12587 + htab->plt->output_offset
12588 + ent->plt.offset);
12589 unresolved_reloc = FALSE;
12590 }
12591 }
12592 break;
12593
12594 case R_PPC64_TOC:
12595 /* Relocation value is TOC base. */
12596 relocation = TOCstart;
12597 if (r_symndx == STN_UNDEF)
12598 relocation += htab->stub_group[input_section->id].toc_off;
12599 else if (unresolved_reloc)
12600 ;
12601 else if (sec != NULL && sec->id <= htab->top_id)
12602 relocation += htab->stub_group[sec->id].toc_off;
12603 else
12604 unresolved_reloc = TRUE;
12605 goto dodyn;
12606
12607 /* TOC16 relocs. We want the offset relative to the TOC base,
12608 which is the address of the start of the TOC plus 0x8000.
12609 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12610 in this order. */
12611 case R_PPC64_TOC16:
12612 case R_PPC64_TOC16_LO:
12613 case R_PPC64_TOC16_HI:
12614 case R_PPC64_TOC16_DS:
12615 case R_PPC64_TOC16_LO_DS:
12616 case R_PPC64_TOC16_HA:
12617 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12618 break;
12619
12620 /* Relocate against the beginning of the section. */
12621 case R_PPC64_SECTOFF:
12622 case R_PPC64_SECTOFF_LO:
12623 case R_PPC64_SECTOFF_HI:
12624 case R_PPC64_SECTOFF_DS:
12625 case R_PPC64_SECTOFF_LO_DS:
12626 case R_PPC64_SECTOFF_HA:
12627 if (sec != NULL)
12628 addend -= sec->output_section->vma;
12629 break;
12630
12631 case R_PPC64_REL16:
12632 case R_PPC64_REL16_LO:
12633 case R_PPC64_REL16_HI:
12634 case R_PPC64_REL16_HA:
12635 break;
12636
12637 case R_PPC64_REL14:
12638 case R_PPC64_REL14_BRNTAKEN:
12639 case R_PPC64_REL14_BRTAKEN:
12640 case R_PPC64_REL24:
12641 break;
12642
12643 case R_PPC64_TPREL16:
12644 case R_PPC64_TPREL16_LO:
12645 case R_PPC64_TPREL16_HI:
12646 case R_PPC64_TPREL16_HA:
12647 case R_PPC64_TPREL16_DS:
12648 case R_PPC64_TPREL16_LO_DS:
12649 case R_PPC64_TPREL16_HIGHER:
12650 case R_PPC64_TPREL16_HIGHERA:
12651 case R_PPC64_TPREL16_HIGHEST:
12652 case R_PPC64_TPREL16_HIGHESTA:
12653 if (h != NULL
12654 && h->elf.root.type == bfd_link_hash_undefweak
12655 && h->elf.dynindx == -1)
12656 {
12657 /* Make this relocation against an undefined weak symbol
12658 resolve to zero. This is really just a tweak, since
12659 code using weak externs ought to check that they are
12660 defined before using them. */
12661 bfd_byte *p = contents + rel->r_offset - d_offset;
12662
12663 insn = bfd_get_32 (output_bfd, p);
12664 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12665 if (insn != 0)
12666 bfd_put_32 (output_bfd, insn, p);
12667 break;
12668 }
12669 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12670 if (info->shared)
12671 /* The TPREL16 relocs shouldn't really be used in shared
12672 libs as they will result in DT_TEXTREL being set, but
12673 support them anyway. */
12674 goto dodyn;
12675 break;
12676
12677 case R_PPC64_DTPREL16:
12678 case R_PPC64_DTPREL16_LO:
12679 case R_PPC64_DTPREL16_HI:
12680 case R_PPC64_DTPREL16_HA:
12681 case R_PPC64_DTPREL16_DS:
12682 case R_PPC64_DTPREL16_LO_DS:
12683 case R_PPC64_DTPREL16_HIGHER:
12684 case R_PPC64_DTPREL16_HIGHERA:
12685 case R_PPC64_DTPREL16_HIGHEST:
12686 case R_PPC64_DTPREL16_HIGHESTA:
12687 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12688 break;
12689
12690 case R_PPC64_DTPMOD64:
12691 relocation = 1;
12692 addend = 0;
12693 goto dodyn;
12694
12695 case R_PPC64_TPREL64:
12696 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12697 goto dodyn;
12698
12699 case R_PPC64_DTPREL64:
12700 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12701 /* Fall thru */
12702
12703 /* Relocations that may need to be propagated if this is a
12704 dynamic object. */
12705 case R_PPC64_REL30:
12706 case R_PPC64_REL32:
12707 case R_PPC64_REL64:
12708 case R_PPC64_ADDR14:
12709 case R_PPC64_ADDR14_BRNTAKEN:
12710 case R_PPC64_ADDR14_BRTAKEN:
12711 case R_PPC64_ADDR16:
12712 case R_PPC64_ADDR16_DS:
12713 case R_PPC64_ADDR16_HA:
12714 case R_PPC64_ADDR16_HI:
12715 case R_PPC64_ADDR16_HIGHER:
12716 case R_PPC64_ADDR16_HIGHERA:
12717 case R_PPC64_ADDR16_HIGHEST:
12718 case R_PPC64_ADDR16_HIGHESTA:
12719 case R_PPC64_ADDR16_LO:
12720 case R_PPC64_ADDR16_LO_DS:
12721 case R_PPC64_ADDR24:
12722 case R_PPC64_ADDR32:
12723 case R_PPC64_ADDR64:
12724 case R_PPC64_UADDR16:
12725 case R_PPC64_UADDR32:
12726 case R_PPC64_UADDR64:
12727 dodyn:
12728 if ((input_section->flags & SEC_ALLOC) == 0)
12729 break;
12730
12731 if (NO_OPD_RELOCS && is_opd)
12732 break;
12733
12734 if ((info->shared
12735 && (h == NULL
12736 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12737 || h->elf.root.type != bfd_link_hash_undefweak)
12738 && (must_be_dyn_reloc (info, r_type)
12739 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12740 || (ELIMINATE_COPY_RELOCS
12741 && !info->shared
12742 && h != NULL
12743 && h->elf.dynindx != -1
12744 && !h->elf.non_got_ref
12745 && !h->elf.def_regular)
12746 || (!info->shared
12747 && (h != NULL
12748 ? h->elf.type == STT_GNU_IFUNC
12749 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12750 {
12751 bfd_boolean skip, relocate;
12752 asection *sreloc;
12753 bfd_vma out_off;
12754
12755 /* When generating a dynamic object, these relocations
12756 are copied into the output file to be resolved at run
12757 time. */
12758
12759 skip = FALSE;
12760 relocate = FALSE;
12761
12762 out_off = _bfd_elf_section_offset (output_bfd, info,
12763 input_section, rel->r_offset);
12764 if (out_off == (bfd_vma) -1)
12765 skip = TRUE;
12766 else if (out_off == (bfd_vma) -2)
12767 skip = TRUE, relocate = TRUE;
12768 out_off += (input_section->output_section->vma
12769 + input_section->output_offset);
12770 outrel.r_offset = out_off;
12771 outrel.r_addend = rel->r_addend;
12772
12773 /* Optimize unaligned reloc use. */
12774 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
12775 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
12776 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
12777 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
12778 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
12779 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
12780 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
12781 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
12782 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
12783
12784 if (skip)
12785 memset (&outrel, 0, sizeof outrel);
12786 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
12787 && !is_opd
12788 && r_type != R_PPC64_TOC)
12789 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
12790 else
12791 {
12792 /* This symbol is local, or marked to become local,
12793 or this is an opd section reloc which must point
12794 at a local function. */
12795 outrel.r_addend += relocation;
12796 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12797 {
12798 if (is_opd && h != NULL)
12799 {
12800 /* Lie about opd entries. This case occurs
12801 when building shared libraries and we
12802 reference a function in another shared
12803 lib. The same thing happens for a weak
12804 definition in an application that's
12805 overridden by a strong definition in a
12806 shared lib. (I believe this is a generic
12807 bug in binutils handling of weak syms.)
12808 In these cases we won't use the opd
12809 entry in this lib. */
12810 unresolved_reloc = FALSE;
12811 }
12812 if (!is_opd
12813 && r_type == R_PPC64_ADDR64
12814 && (h != NULL
12815 ? h->elf.type == STT_GNU_IFUNC
12816 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12817 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12818 else
12819 {
12820 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12821
12822 /* We need to relocate .opd contents for ld.so.
12823 Prelink also wants simple and consistent rules
12824 for relocs. This make all RELATIVE relocs have
12825 *r_offset equal to r_addend. */
12826 relocate = TRUE;
12827 }
12828 }
12829 else
12830 {
12831 long indx = 0;
12832
12833 if (h != NULL
12834 ? h->elf.type == STT_GNU_IFUNC
12835 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12836 {
12837 (*_bfd_error_handler)
12838 (_("%B(%A+0x%lx): relocation %s for indirect "
12839 "function %s unsupported"),
12840 input_bfd,
12841 input_section,
12842 (long) rel->r_offset,
12843 ppc64_elf_howto_table[r_type]->name,
12844 sym_name);
12845 ret = FALSE;
12846 }
12847 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
12848 ;
12849 else if (sec == NULL || sec->owner == NULL)
12850 {
12851 bfd_set_error (bfd_error_bad_value);
12852 return FALSE;
12853 }
12854 else
12855 {
12856 asection *osec;
12857
12858 osec = sec->output_section;
12859 indx = elf_section_data (osec)->dynindx;
12860
12861 if (indx == 0)
12862 {
12863 if ((osec->flags & SEC_READONLY) == 0
12864 && htab->elf.data_index_section != NULL)
12865 osec = htab->elf.data_index_section;
12866 else
12867 osec = htab->elf.text_index_section;
12868 indx = elf_section_data (osec)->dynindx;
12869 }
12870 BFD_ASSERT (indx != 0);
12871
12872 /* We are turning this relocation into one
12873 against a section symbol, so subtract out
12874 the output section's address but not the
12875 offset of the input section in the output
12876 section. */
12877 outrel.r_addend -= osec->vma;
12878 }
12879
12880 outrel.r_info = ELF64_R_INFO (indx, r_type);
12881 }
12882 }
12883
12884 sreloc = elf_section_data (input_section)->sreloc;
12885 if (!htab->elf.dynamic_sections_created)
12886 sreloc = htab->reliplt;
12887 if (sreloc == NULL)
12888 abort ();
12889
12890 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12891 >= sreloc->size)
12892 abort ();
12893 loc = sreloc->contents;
12894 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12895 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12896
12897 /* If this reloc is against an external symbol, it will
12898 be computed at runtime, so there's no need to do
12899 anything now. However, for the sake of prelink ensure
12900 that the section contents are a known value. */
12901 if (! relocate)
12902 {
12903 unresolved_reloc = FALSE;
12904 /* The value chosen here is quite arbitrary as ld.so
12905 ignores section contents except for the special
12906 case of .opd where the contents might be accessed
12907 before relocation. Choose zero, as that won't
12908 cause reloc overflow. */
12909 relocation = 0;
12910 addend = 0;
12911 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12912 to improve backward compatibility with older
12913 versions of ld. */
12914 if (r_type == R_PPC64_ADDR64)
12915 addend = outrel.r_addend;
12916 /* Adjust pc_relative relocs to have zero in *r_offset. */
12917 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12918 addend = (input_section->output_section->vma
12919 + input_section->output_offset
12920 + rel->r_offset);
12921 }
12922 }
12923 break;
12924
12925 case R_PPC64_COPY:
12926 case R_PPC64_GLOB_DAT:
12927 case R_PPC64_JMP_SLOT:
12928 case R_PPC64_JMP_IREL:
12929 case R_PPC64_RELATIVE:
12930 /* We shouldn't ever see these dynamic relocs in relocatable
12931 files. */
12932 /* Fall through. */
12933
12934 case R_PPC64_PLTGOT16:
12935 case R_PPC64_PLTGOT16_DS:
12936 case R_PPC64_PLTGOT16_HA:
12937 case R_PPC64_PLTGOT16_HI:
12938 case R_PPC64_PLTGOT16_LO:
12939 case R_PPC64_PLTGOT16_LO_DS:
12940 case R_PPC64_PLTREL32:
12941 case R_PPC64_PLTREL64:
12942 /* These ones haven't been implemented yet. */
12943
12944 (*_bfd_error_handler)
12945 (_("%B: relocation %s is not supported for symbol %s."),
12946 input_bfd,
12947 ppc64_elf_howto_table[r_type]->name, sym_name);
12948
12949 bfd_set_error (bfd_error_invalid_operation);
12950 ret = FALSE;
12951 continue;
12952 }
12953
12954 /* Multi-instruction sequences that access the TOC can be
12955 optimized, eg. addis ra,r2,0; addi rb,ra,x;
12956 to nop; addi rb,r2,x; */
12957 switch (r_type)
12958 {
12959 default:
12960 break;
12961
12962 case R_PPC64_GOT_TLSLD16_HI:
12963 case R_PPC64_GOT_TLSGD16_HI:
12964 case R_PPC64_GOT_TPREL16_HI:
12965 case R_PPC64_GOT_DTPREL16_HI:
12966 case R_PPC64_GOT16_HI:
12967 case R_PPC64_TOC16_HI:
12968 /* These relocs would only be useful if building up an
12969 offset to later add to r2, perhaps in an indexed
12970 addressing mode instruction. Don't try to optimize.
12971 Unfortunately, the possibility of someone building up an
12972 offset like this or even with the HA relocs, means that
12973 we need to check the high insn when optimizing the low
12974 insn. */
12975 break;
12976
12977 case R_PPC64_GOT_TLSLD16_HA:
12978 case R_PPC64_GOT_TLSGD16_HA:
12979 case R_PPC64_GOT_TPREL16_HA:
12980 case R_PPC64_GOT_DTPREL16_HA:
12981 case R_PPC64_GOT16_HA:
12982 case R_PPC64_TOC16_HA:
12983 /* nop is done later. */
12984 break;
12985
12986 case R_PPC64_GOT_TLSLD16_LO:
12987 case R_PPC64_GOT_TLSGD16_LO:
12988 case R_PPC64_GOT_TPREL16_LO_DS:
12989 case R_PPC64_GOT_DTPREL16_LO_DS:
12990 case R_PPC64_GOT16_LO:
12991 case R_PPC64_GOT16_LO_DS:
12992 case R_PPC64_TOC16_LO:
12993 case R_PPC64_TOC16_LO_DS:
12994 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000)
12995 {
12996 bfd_byte *p = contents + (rel->r_offset & ~3);
12997 insn = bfd_get_32 (input_bfd, p);
12998 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
12999 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
13000 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
13001 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
13002 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
13003 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
13004 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
13005 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
13006 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
13007 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
13008 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
13009 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
13010 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
13011 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
13012 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
13013 && (insn & 3) != 1)
13014 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
13015 && ((insn & 3) == 0 || (insn & 3) == 3)))
13016 {
13017 unsigned int reg = (insn >> 16) & 0x1f;
13018 const Elf_Internal_Rela *ha;
13019 bfd_boolean match_addend;
13020
13021 match_addend = (sym != NULL
13022 && ELF_ST_TYPE (sym->st_info) == STT_SECTION);
13023 ha = ha_reloc_match (relocs, rel, &reg, match_addend,
13024 input_bfd, contents);
13025 if (ha != NULL)
13026 {
13027 insn &= ~(0x1f << 16);
13028 insn |= reg << 16;
13029 bfd_put_32 (input_bfd, insn, p);
13030 if (ha_opt == NULL)
13031 {
13032 ha_opt = bfd_zmalloc (input_section->reloc_count);
13033 if (ha_opt == NULL)
13034 return FALSE;
13035 }
13036 ha_opt[ha - relocs] = 1;
13037 }
13038 else
13039 /* If we don't find a matching high part insn,
13040 something is fishy. Refuse to nop any high
13041 part insn in this section. */
13042 no_ha_opt = TRUE;
13043 }
13044 }
13045 break;
13046 }
13047
13048 /* Do any further special processing. */
13049 switch (r_type)
13050 {
13051 default:
13052 break;
13053
13054 case R_PPC64_ADDR16_HA:
13055 case R_PPC64_REL16_HA:
13056 case R_PPC64_ADDR16_HIGHERA:
13057 case R_PPC64_ADDR16_HIGHESTA:
13058 case R_PPC64_TOC16_HA:
13059 case R_PPC64_SECTOFF_HA:
13060 case R_PPC64_TPREL16_HA:
13061 case R_PPC64_DTPREL16_HA:
13062 case R_PPC64_TPREL16_HIGHER:
13063 case R_PPC64_TPREL16_HIGHERA:
13064 case R_PPC64_TPREL16_HIGHEST:
13065 case R_PPC64_TPREL16_HIGHESTA:
13066 case R_PPC64_DTPREL16_HIGHER:
13067 case R_PPC64_DTPREL16_HIGHERA:
13068 case R_PPC64_DTPREL16_HIGHEST:
13069 case R_PPC64_DTPREL16_HIGHESTA:
13070 /* It's just possible that this symbol is a weak symbol
13071 that's not actually defined anywhere. In that case,
13072 'sec' would be NULL, and we should leave the symbol
13073 alone (it will be set to zero elsewhere in the link). */
13074 if (sec == NULL)
13075 break;
13076 /* Fall thru */
13077
13078 case R_PPC64_GOT16_HA:
13079 case R_PPC64_PLTGOT16_HA:
13080 case R_PPC64_PLT16_HA:
13081 case R_PPC64_GOT_TLSGD16_HA:
13082 case R_PPC64_GOT_TLSLD16_HA:
13083 case R_PPC64_GOT_TPREL16_HA:
13084 case R_PPC64_GOT_DTPREL16_HA:
13085 /* Add 0x10000 if sign bit in 0:15 is set.
13086 Bits 0:15 are not used. */
13087 addend += 0x8000;
13088 break;
13089
13090 case R_PPC64_ADDR16_DS:
13091 case R_PPC64_ADDR16_LO_DS:
13092 case R_PPC64_GOT16_DS:
13093 case R_PPC64_GOT16_LO_DS:
13094 case R_PPC64_PLT16_LO_DS:
13095 case R_PPC64_SECTOFF_DS:
13096 case R_PPC64_SECTOFF_LO_DS:
13097 case R_PPC64_TOC16_DS:
13098 case R_PPC64_TOC16_LO_DS:
13099 case R_PPC64_PLTGOT16_DS:
13100 case R_PPC64_PLTGOT16_LO_DS:
13101 case R_PPC64_GOT_TPREL16_DS:
13102 case R_PPC64_GOT_TPREL16_LO_DS:
13103 case R_PPC64_GOT_DTPREL16_DS:
13104 case R_PPC64_GOT_DTPREL16_LO_DS:
13105 case R_PPC64_TPREL16_DS:
13106 case R_PPC64_TPREL16_LO_DS:
13107 case R_PPC64_DTPREL16_DS:
13108 case R_PPC64_DTPREL16_LO_DS:
13109 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13110 mask = 3;
13111 /* If this reloc is against an lq insn, then the value must be
13112 a multiple of 16. This is somewhat of a hack, but the
13113 "correct" way to do this by defining _DQ forms of all the
13114 _DS relocs bloats all reloc switches in this file. It
13115 doesn't seem to make much sense to use any of these relocs
13116 in data, so testing the insn should be safe. */
13117 if ((insn & (0x3f << 26)) == (56u << 26))
13118 mask = 15;
13119 if (((relocation + addend) & mask) != 0)
13120 {
13121 (*_bfd_error_handler)
13122 (_("%B: error: relocation %s not a multiple of %d"),
13123 input_bfd,
13124 ppc64_elf_howto_table[r_type]->name,
13125 mask + 1);
13126 bfd_set_error (bfd_error_bad_value);
13127 ret = FALSE;
13128 continue;
13129 }
13130 break;
13131 }
13132
13133 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13134 because such sections are not SEC_ALLOC and thus ld.so will
13135 not process them. */
13136 if (unresolved_reloc
13137 && !((input_section->flags & SEC_DEBUGGING) != 0
13138 && h->elf.def_dynamic))
13139 {
13140 (*_bfd_error_handler)
13141 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
13142 input_bfd,
13143 input_section,
13144 (long) rel->r_offset,
13145 ppc64_elf_howto_table[(int) r_type]->name,
13146 h->elf.root.root.string);
13147 ret = FALSE;
13148 }
13149
13150 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13151 input_bfd,
13152 input_section,
13153 contents,
13154 rel->r_offset,
13155 relocation,
13156 addend);
13157
13158 if (r != bfd_reloc_ok)
13159 {
13160 if (sym_name == NULL)
13161 sym_name = "(null)";
13162 if (r == bfd_reloc_overflow)
13163 {
13164 if (warned)
13165 continue;
13166 if (h != NULL
13167 && h->elf.root.type == bfd_link_hash_undefweak
13168 && ppc64_elf_howto_table[r_type]->pc_relative)
13169 {
13170 /* Assume this is a call protected by other code that
13171 detects the symbol is undefined. If this is the case,
13172 we can safely ignore the overflow. If not, the
13173 program is hosed anyway, and a little warning isn't
13174 going to help. */
13175
13176 continue;
13177 }
13178
13179 if (!((*info->callbacks->reloc_overflow)
13180 (info, (h ? &h->elf.root : NULL), sym_name,
13181 ppc64_elf_howto_table[r_type]->name,
13182 orig_addend, input_bfd, input_section, rel->r_offset)))
13183 return FALSE;
13184 }
13185 else
13186 {
13187 (*_bfd_error_handler)
13188 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
13189 input_bfd,
13190 input_section,
13191 (long) rel->r_offset,
13192 ppc64_elf_howto_table[r_type]->name,
13193 sym_name,
13194 (int) r);
13195 ret = FALSE;
13196 }
13197 }
13198 }
13199
13200 if (ha_opt != NULL)
13201 {
13202 if (!no_ha_opt)
13203 {
13204 unsigned char *opt = ha_opt;
13205 rel = relocs;
13206 relend = relocs + input_section->reloc_count;
13207 for (; rel < relend; opt++, rel++)
13208 if (*opt != 0)
13209 {
13210 bfd_byte *p = contents + (rel->r_offset & ~3);
13211 bfd_put_32 (input_bfd, NOP, p);
13212 }
13213 }
13214 free (ha_opt);
13215 }
13216
13217 /* If we're emitting relocations, then shortly after this function
13218 returns, reloc offsets and addends for this section will be
13219 adjusted. Worse, reloc symbol indices will be for the output
13220 file rather than the input. Save a copy of the relocs for
13221 opd_entry_value. */
13222 if (is_opd && (info->emitrelocations || info->relocatable))
13223 {
13224 bfd_size_type amt;
13225 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13226 rel = bfd_alloc (input_bfd, amt);
13227 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13228 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13229 if (rel == NULL)
13230 return FALSE;
13231 memcpy (rel, relocs, amt);
13232 }
13233 return ret;
13234 }
13235
13236 /* Adjust the value of any local symbols in opd sections. */
13237
13238 static int
13239 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13240 const char *name ATTRIBUTE_UNUSED,
13241 Elf_Internal_Sym *elfsym,
13242 asection *input_sec,
13243 struct elf_link_hash_entry *h)
13244 {
13245 struct _opd_sec_data *opd;
13246 long adjust;
13247 bfd_vma value;
13248
13249 if (h != NULL)
13250 return 1;
13251
13252 opd = get_opd_info (input_sec);
13253 if (opd == NULL || opd->adjust == NULL)
13254 return 1;
13255
13256 value = elfsym->st_value - input_sec->output_offset;
13257 if (!info->relocatable)
13258 value -= input_sec->output_section->vma;
13259
13260 adjust = opd->adjust[value / 8];
13261 if (adjust == -1)
13262 return 2;
13263
13264 elfsym->st_value += adjust;
13265 return 1;
13266 }
13267
13268 /* Finish up dynamic symbol handling. We set the contents of various
13269 dynamic sections here. */
13270
13271 static bfd_boolean
13272 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13273 struct bfd_link_info *info,
13274 struct elf_link_hash_entry *h,
13275 Elf_Internal_Sym *sym)
13276 {
13277 struct ppc_link_hash_table *htab;
13278 struct plt_entry *ent;
13279 Elf_Internal_Rela rela;
13280 bfd_byte *loc;
13281
13282 htab = ppc_hash_table (info);
13283 if (htab == NULL)
13284 return FALSE;
13285
13286 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13287 if (ent->plt.offset != (bfd_vma) -1)
13288 {
13289 /* This symbol has an entry in the procedure linkage
13290 table. Set it up. */
13291 if (!htab->elf.dynamic_sections_created
13292 || h->dynindx == -1)
13293 {
13294 BFD_ASSERT (h->type == STT_GNU_IFUNC
13295 && h->def_regular
13296 && (h->root.type == bfd_link_hash_defined
13297 || h->root.type == bfd_link_hash_defweak));
13298 rela.r_offset = (htab->iplt->output_section->vma
13299 + htab->iplt->output_offset
13300 + ent->plt.offset);
13301 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13302 rela.r_addend = (h->root.u.def.value
13303 + h->root.u.def.section->output_offset
13304 + h->root.u.def.section->output_section->vma
13305 + ent->addend);
13306 loc = (htab->reliplt->contents
13307 + (htab->reliplt->reloc_count++
13308 * sizeof (Elf64_External_Rela)));
13309 }
13310 else
13311 {
13312 rela.r_offset = (htab->plt->output_section->vma
13313 + htab->plt->output_offset
13314 + ent->plt.offset);
13315 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13316 rela.r_addend = ent->addend;
13317 loc = (htab->relplt->contents
13318 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13319 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13320 }
13321 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13322 }
13323
13324 if (h->needs_copy)
13325 {
13326 /* This symbol needs a copy reloc. Set it up. */
13327
13328 if (h->dynindx == -1
13329 || (h->root.type != bfd_link_hash_defined
13330 && h->root.type != bfd_link_hash_defweak)
13331 || htab->relbss == NULL)
13332 abort ();
13333
13334 rela.r_offset = (h->root.u.def.value
13335 + h->root.u.def.section->output_section->vma
13336 + h->root.u.def.section->output_offset);
13337 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13338 rela.r_addend = 0;
13339 loc = htab->relbss->contents;
13340 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13341 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13342 }
13343
13344 /* Mark some specially defined symbols as absolute. */
13345 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13346 sym->st_shndx = SHN_ABS;
13347
13348 return TRUE;
13349 }
13350
13351 /* Used to decide how to sort relocs in an optimal manner for the
13352 dynamic linker, before writing them out. */
13353
13354 static enum elf_reloc_type_class
13355 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13356 {
13357 enum elf_ppc64_reloc_type r_type;
13358
13359 r_type = ELF64_R_TYPE (rela->r_info);
13360 switch (r_type)
13361 {
13362 case R_PPC64_RELATIVE:
13363 return reloc_class_relative;
13364 case R_PPC64_JMP_SLOT:
13365 return reloc_class_plt;
13366 case R_PPC64_COPY:
13367 return reloc_class_copy;
13368 default:
13369 return reloc_class_normal;
13370 }
13371 }
13372
13373 /* Finish up the dynamic sections. */
13374
13375 static bfd_boolean
13376 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13377 struct bfd_link_info *info)
13378 {
13379 struct ppc_link_hash_table *htab;
13380 bfd *dynobj;
13381 asection *sdyn;
13382
13383 htab = ppc_hash_table (info);
13384 if (htab == NULL)
13385 return FALSE;
13386
13387 dynobj = htab->elf.dynobj;
13388 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13389
13390 if (htab->elf.dynamic_sections_created)
13391 {
13392 Elf64_External_Dyn *dyncon, *dynconend;
13393
13394 if (sdyn == NULL || htab->got == NULL)
13395 abort ();
13396
13397 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13398 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13399 for (; dyncon < dynconend; dyncon++)
13400 {
13401 Elf_Internal_Dyn dyn;
13402 asection *s;
13403
13404 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13405
13406 switch (dyn.d_tag)
13407 {
13408 default:
13409 continue;
13410
13411 case DT_PPC64_GLINK:
13412 s = htab->glink;
13413 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13414 /* We stupidly defined DT_PPC64_GLINK to be the start
13415 of glink rather than the first entry point, which is
13416 what ld.so needs, and now have a bigger stub to
13417 support automatic multiple TOCs. */
13418 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13419 break;
13420
13421 case DT_PPC64_OPD:
13422 s = bfd_get_section_by_name (output_bfd, ".opd");
13423 if (s == NULL)
13424 continue;
13425 dyn.d_un.d_ptr = s->vma;
13426 break;
13427
13428 case DT_PPC64_OPDSZ:
13429 s = bfd_get_section_by_name (output_bfd, ".opd");
13430 if (s == NULL)
13431 continue;
13432 dyn.d_un.d_val = s->size;
13433 break;
13434
13435 case DT_PLTGOT:
13436 s = htab->plt;
13437 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13438 break;
13439
13440 case DT_JMPREL:
13441 s = htab->relplt;
13442 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13443 break;
13444
13445 case DT_PLTRELSZ:
13446 dyn.d_un.d_val = htab->relplt->size;
13447 break;
13448
13449 case DT_RELASZ:
13450 /* Don't count procedure linkage table relocs in the
13451 overall reloc count. */
13452 s = htab->relplt;
13453 if (s == NULL)
13454 continue;
13455 dyn.d_un.d_val -= s->size;
13456 break;
13457
13458 case DT_RELA:
13459 /* We may not be using the standard ELF linker script.
13460 If .rela.plt is the first .rela section, we adjust
13461 DT_RELA to not include it. */
13462 s = htab->relplt;
13463 if (s == NULL)
13464 continue;
13465 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13466 continue;
13467 dyn.d_un.d_ptr += s->size;
13468 break;
13469 }
13470
13471 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13472 }
13473 }
13474
13475 if (htab->got != NULL && htab->got->size != 0)
13476 {
13477 /* Fill in the first entry in the global offset table.
13478 We use it to hold the link-time TOCbase. */
13479 bfd_put_64 (output_bfd,
13480 elf_gp (output_bfd) + TOC_BASE_OFF,
13481 htab->got->contents);
13482
13483 /* Set .got entry size. */
13484 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13485 }
13486
13487 if (htab->plt != NULL && htab->plt->size != 0)
13488 {
13489 /* Set .plt entry size. */
13490 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13491 = PLT_ENTRY_SIZE;
13492 }
13493
13494 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13495 brlt ourselves if emitrelocations. */
13496 if (htab->brlt != NULL
13497 && htab->brlt->reloc_count != 0
13498 && !_bfd_elf_link_output_relocs (output_bfd,
13499 htab->brlt,
13500 elf_section_data (htab->brlt)->rela.hdr,
13501 elf_section_data (htab->brlt)->relocs,
13502 NULL))
13503 return FALSE;
13504
13505 if (htab->glink != NULL
13506 && htab->glink->reloc_count != 0
13507 && !_bfd_elf_link_output_relocs (output_bfd,
13508 htab->glink,
13509 elf_section_data (htab->glink)->rela.hdr,
13510 elf_section_data (htab->glink)->relocs,
13511 NULL))
13512 return FALSE;
13513
13514 /* We need to handle writing out multiple GOT sections ourselves,
13515 since we didn't add them to DYNOBJ. We know dynobj is the first
13516 bfd. */
13517 while ((dynobj = dynobj->link_next) != NULL)
13518 {
13519 asection *s;
13520
13521 if (!is_ppc64_elf (dynobj))
13522 continue;
13523
13524 s = ppc64_elf_tdata (dynobj)->got;
13525 if (s != NULL
13526 && s->size != 0
13527 && s->output_section != bfd_abs_section_ptr
13528 && !bfd_set_section_contents (output_bfd, s->output_section,
13529 s->contents, s->output_offset,
13530 s->size))
13531 return FALSE;
13532 s = ppc64_elf_tdata (dynobj)->relgot;
13533 if (s != NULL
13534 && s->size != 0
13535 && s->output_section != bfd_abs_section_ptr
13536 && !bfd_set_section_contents (output_bfd, s->output_section,
13537 s->contents, s->output_offset,
13538 s->size))
13539 return FALSE;
13540 }
13541
13542 return TRUE;
13543 }
13544
13545 #include "elf64-target.h"
git-cvsimport of binutils cvsroot