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0afcef53 | 1 | /* x86 specific support for ELF |
b3adc24a | 2 | Copyright (C) 2017-2020 Free Software Foundation, Inc. |
0afcef53 L |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
19 | MA 02110-1301, USA. */ | |
20 | ||
21 | #include "elfxx-x86.h" | |
a6798bab | 22 | #include "elf-vxworks.h" |
765e526c L |
23 | #include "objalloc.h" |
24 | #include "elf/i386.h" | |
25 | #include "elf/x86-64.h" | |
26 | ||
27 | /* The name of the dynamic interpreter. This is put in the .interp | |
28 | section. */ | |
29 | ||
30 | #define ELF32_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
31 | #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1" | |
32 | #define ELFX32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1" | |
0afcef53 | 33 | |
39946cc2 L |
34 | bfd_boolean |
35 | _bfd_x86_elf_mkobject (bfd *abfd) | |
36 | { | |
37 | return bfd_elf_allocate_object (abfd, | |
38 | sizeof (struct elf_x86_obj_tdata), | |
39 | get_elf_backend_data (abfd)->target_id); | |
40 | } | |
41 | ||
0afcef53 L |
42 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
43 | executables. Rather than setting it to the beginning of the TLS | |
44 | section, we have to set it to the end. This function may be called | |
45 | multiple times, it is idempotent. */ | |
46 | ||
47 | void | |
48 | _bfd_x86_elf_set_tls_module_base (struct bfd_link_info *info) | |
49 | { | |
50 | struct elf_x86_link_hash_table *htab; | |
51 | struct bfd_link_hash_entry *base; | |
52 | const struct elf_backend_data *bed; | |
53 | ||
54 | if (!bfd_link_executable (info)) | |
55 | return; | |
56 | ||
57 | bed = get_elf_backend_data (info->output_bfd); | |
58 | htab = elf_x86_hash_table (info, bed->target_id); | |
59 | if (htab == NULL) | |
60 | return; | |
61 | ||
62 | base = htab->tls_module_base; | |
63 | if (base == NULL) | |
64 | return; | |
65 | ||
66 | base->u.def.value = htab->elf.tls_size; | |
67 | } | |
68 | ||
69 | /* Return the base VMA address which should be subtracted from real addresses | |
70 | when resolving @dtpoff relocation. | |
71 | This is PT_TLS segment p_vaddr. */ | |
72 | ||
73 | bfd_vma | |
74 | _bfd_x86_elf_dtpoff_base (struct bfd_link_info *info) | |
75 | { | |
76 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
77 | if (elf_hash_table (info)->tls_sec == NULL) | |
78 | return 0; | |
79 | return elf_hash_table (info)->tls_sec->vma; | |
80 | } | |
81 | ||
b9ce864c L |
82 | /* Allocate space in .plt, .got and associated reloc sections for |
83 | dynamic relocs. */ | |
84 | ||
5e2ac45d | 85 | static bfd_boolean |
70090aa5 | 86 | elf_x86_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
b9ce864c L |
87 | { |
88 | struct bfd_link_info *info; | |
89 | struct elf_x86_link_hash_table *htab; | |
90 | struct elf_x86_link_hash_entry *eh; | |
91 | struct elf_dyn_relocs *p; | |
92 | unsigned int plt_entry_size; | |
93 | bfd_boolean resolved_to_zero; | |
94 | const struct elf_backend_data *bed; | |
95 | ||
96 | if (h->root.type == bfd_link_hash_indirect) | |
97 | return TRUE; | |
98 | ||
99 | eh = (struct elf_x86_link_hash_entry *) h; | |
100 | ||
101 | info = (struct bfd_link_info *) inf; | |
102 | bed = get_elf_backend_data (info->output_bfd); | |
103 | htab = elf_x86_hash_table (info, bed->target_id); | |
104 | if (htab == NULL) | |
105 | return FALSE; | |
106 | ||
107 | plt_entry_size = htab->plt.plt_entry_size; | |
108 | ||
c5bce5c6 | 109 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
b9ce864c | 110 | |
b9ce864c L |
111 | /* We can't use the GOT PLT if pointer equality is needed since |
112 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
113 | linker won't update the GOT slot. We will get into an infinite | |
114 | loop at run-time. */ | |
115 | if (htab->plt_got != NULL | |
116 | && h->type != STT_GNU_IFUNC | |
117 | && !h->pointer_equality_needed | |
118 | && h->plt.refcount > 0 | |
119 | && h->got.refcount > 0) | |
120 | { | |
121 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
07d6d2b8 | 122 | reloctions. */ |
b9ce864c L |
123 | h->plt.offset = (bfd_vma) -1; |
124 | ||
125 | /* Use the GOT PLT. */ | |
126 | eh->plt_got.refcount = 1; | |
127 | } | |
128 | ||
129 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it | |
130 | here if it is defined and referenced in a non-shared object. */ | |
131 | if (h->type == STT_GNU_IFUNC | |
132 | && h->def_regular) | |
133 | { | |
134 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs, | |
135 | &htab->readonly_dynrelocs_against_ifunc, | |
136 | plt_entry_size, | |
137 | (htab->plt.has_plt0 | |
138 | * plt_entry_size), | |
139 | htab->got_entry_size, | |
140 | TRUE)) | |
141 | { | |
142 | asection *s = htab->plt_second; | |
143 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) | |
144 | { | |
145 | /* Use the second PLT section if it is created. */ | |
146 | eh->plt_second.offset = s->size; | |
147 | ||
148 | /* Make room for this entry in the second PLT section. */ | |
149 | s->size += htab->non_lazy_plt->plt_entry_size; | |
150 | } | |
151 | ||
152 | return TRUE; | |
153 | } | |
154 | else | |
155 | return FALSE; | |
156 | } | |
157 | /* Don't create the PLT entry if there are only function pointer | |
158 | relocations which can be resolved at run-time. */ | |
159 | else if (htab->elf.dynamic_sections_created | |
79b0c981 | 160 | && (h->plt.refcount > 0 |
b9ce864c L |
161 | || eh->plt_got.refcount > 0)) |
162 | { | |
163 | bfd_boolean use_plt_got = eh->plt_got.refcount > 0; | |
164 | ||
b9ce864c L |
165 | /* Make sure this symbol is output as a dynamic symbol. |
166 | Undefined weak syms won't yet be marked as dynamic. */ | |
167 | if (h->dynindx == -1 | |
168 | && !h->forced_local | |
169 | && !resolved_to_zero | |
170 | && h->root.type == bfd_link_hash_undefweak) | |
171 | { | |
172 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
173 | return FALSE; | |
174 | } | |
175 | ||
176 | if (bfd_link_pic (info) | |
177 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
178 | { | |
179 | asection *s = htab->elf.splt; | |
180 | asection *second_s = htab->plt_second; | |
181 | asection *got_s = htab->plt_got; | |
451875b4 | 182 | bfd_boolean use_plt; |
b9ce864c L |
183 | |
184 | /* If this is the first .plt entry, make room for the special | |
185 | first entry. The .plt section is used by prelink to undo | |
186 | prelinking for dynamic relocations. */ | |
187 | if (s->size == 0) | |
188 | s->size = htab->plt.has_plt0 * plt_entry_size; | |
189 | ||
190 | if (use_plt_got) | |
191 | eh->plt_got.offset = got_s->size; | |
192 | else | |
193 | { | |
194 | h->plt.offset = s->size; | |
195 | if (second_s) | |
196 | eh->plt_second.offset = second_s->size; | |
197 | } | |
198 | ||
199 | /* If this symbol is not defined in a regular file, and we are | |
451875b4 L |
200 | generating PDE, then set the symbol to this location in the |
201 | .plt. This is required to make function pointers compare | |
202 | as equal between PDE and the shared library. | |
203 | ||
204 | NB: If PLT is PC-relative, we can use the .plt in PIE for | |
205 | function address. */ | |
206 | if (h->def_regular) | |
207 | use_plt = FALSE; | |
208 | else if (htab->pcrel_plt) | |
209 | use_plt = ! bfd_link_dll (info); | |
210 | else | |
211 | use_plt = bfd_link_pde (info); | |
212 | if (use_plt) | |
b9ce864c L |
213 | { |
214 | if (use_plt_got) | |
215 | { | |
216 | /* We need to make a call to the entry of the GOT PLT | |
217 | instead of regular PLT entry. */ | |
218 | h->root.u.def.section = got_s; | |
219 | h->root.u.def.value = eh->plt_got.offset; | |
220 | } | |
221 | else | |
222 | { | |
223 | if (second_s) | |
224 | { | |
225 | /* We need to make a call to the entry of the | |
226 | second PLT instead of regular PLT entry. */ | |
227 | h->root.u.def.section = second_s; | |
228 | h->root.u.def.value = eh->plt_second.offset; | |
229 | } | |
230 | else | |
231 | { | |
232 | h->root.u.def.section = s; | |
233 | h->root.u.def.value = h->plt.offset; | |
234 | } | |
235 | } | |
236 | } | |
237 | ||
238 | /* Make room for this entry. */ | |
239 | if (use_plt_got) | |
240 | got_s->size += htab->non_lazy_plt->plt_entry_size; | |
241 | else | |
242 | { | |
243 | s->size += plt_entry_size; | |
244 | if (second_s) | |
245 | second_s->size += htab->non_lazy_plt->plt_entry_size; | |
246 | ||
247 | /* We also need to make an entry in the .got.plt section, | |
248 | which will be placed in the .got section by the linker | |
249 | script. */ | |
250 | htab->elf.sgotplt->size += htab->got_entry_size; | |
251 | ||
252 | /* There should be no PLT relocation against resolved | |
253 | undefined weak symbol in executable. */ | |
254 | if (!resolved_to_zero) | |
255 | { | |
256 | /* We also need to make an entry in the .rel.plt | |
257 | section. */ | |
258 | htab->elf.srelplt->size += htab->sizeof_reloc; | |
259 | htab->elf.srelplt->reloc_count++; | |
260 | } | |
261 | } | |
262 | ||
851b6fa1 | 263 | if (htab->target_os == is_vxworks && !bfd_link_pic (info)) |
b9ce864c L |
264 | { |
265 | /* VxWorks has a second set of relocations for each PLT entry | |
266 | in executables. They go in a separate relocation section, | |
267 | which is processed by the kernel loader. */ | |
268 | ||
269 | /* There are two relocations for the initial PLT entry: an | |
270 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
271 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
272 | ||
273 | asection *srelplt2 = htab->srelplt2; | |
274 | if (h->plt.offset == plt_entry_size) | |
275 | srelplt2->size += (htab->sizeof_reloc * 2); | |
276 | ||
277 | /* There are two extra relocations for each subsequent PLT entry: | |
278 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
279 | relocation for the PLT entry. */ | |
280 | ||
281 | srelplt2->size += (htab->sizeof_reloc * 2); | |
282 | } | |
283 | } | |
284 | else | |
285 | { | |
286 | eh->plt_got.offset = (bfd_vma) -1; | |
287 | h->plt.offset = (bfd_vma) -1; | |
288 | h->needs_plt = 0; | |
289 | } | |
290 | } | |
291 | else | |
292 | { | |
293 | eh->plt_got.offset = (bfd_vma) -1; | |
294 | h->plt.offset = (bfd_vma) -1; | |
295 | h->needs_plt = 0; | |
296 | } | |
297 | ||
298 | eh->tlsdesc_got = (bfd_vma) -1; | |
299 | ||
300 | /* For i386, if R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the | |
301 | binary, make it a R_386_TLS_LE_32 requiring no TLS entry. For | |
302 | x86-64, if R_X86_64_GOTTPOFF symbol is now local to the binary, | |
303 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
304 | if (h->got.refcount > 0 | |
305 | && bfd_link_executable (info) | |
306 | && h->dynindx == -1 | |
307 | && (elf_x86_hash_entry (h)->tls_type & GOT_TLS_IE)) | |
308 | h->got.offset = (bfd_vma) -1; | |
309 | else if (h->got.refcount > 0) | |
310 | { | |
311 | asection *s; | |
312 | bfd_boolean dyn; | |
313 | int tls_type = elf_x86_hash_entry (h)->tls_type; | |
314 | ||
315 | /* Make sure this symbol is output as a dynamic symbol. | |
316 | Undefined weak syms won't yet be marked as dynamic. */ | |
317 | if (h->dynindx == -1 | |
318 | && !h->forced_local | |
319 | && !resolved_to_zero | |
320 | && h->root.type == bfd_link_hash_undefweak) | |
321 | { | |
322 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
323 | return FALSE; | |
324 | } | |
325 | ||
326 | s = htab->elf.sgot; | |
327 | if (GOT_TLS_GDESC_P (tls_type)) | |
328 | { | |
329 | eh->tlsdesc_got = htab->elf.sgotplt->size | |
330 | - elf_x86_compute_jump_table_size (htab); | |
331 | htab->elf.sgotplt->size += 2 * htab->got_entry_size; | |
332 | h->got.offset = (bfd_vma) -2; | |
333 | } | |
334 | if (! GOT_TLS_GDESC_P (tls_type) | |
335 | || GOT_TLS_GD_P (tls_type)) | |
336 | { | |
337 | h->got.offset = s->size; | |
338 | s->size += htab->got_entry_size; | |
339 | /* R_386_TLS_GD and R_X86_64_TLSGD need 2 consecutive GOT | |
340 | slots. */ | |
341 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
342 | s->size += htab->got_entry_size; | |
343 | } | |
344 | dyn = htab->elf.dynamic_sections_created; | |
345 | /* R_386_TLS_IE_32 needs one dynamic relocation, | |
346 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, | |
347 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
348 | need two), R_386_TLS_GD and R_X86_64_TLSGD need one if local | |
349 | symbol and two if global. No dynamic relocation against | |
382aae06 L |
350 | resolved undefined weak symbol in executable. No dynamic |
351 | relocation against non-preemptible absolute symbol. */ | |
b9ce864c L |
352 | if (tls_type == GOT_TLS_IE_BOTH) |
353 | htab->elf.srelgot->size += 2 * htab->sizeof_reloc; | |
354 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) | |
355 | || (tls_type & GOT_TLS_IE)) | |
356 | htab->elf.srelgot->size += htab->sizeof_reloc; | |
357 | else if (GOT_TLS_GD_P (tls_type)) | |
358 | htab->elf.srelgot->size += 2 * htab->sizeof_reloc; | |
359 | else if (! GOT_TLS_GDESC_P (tls_type) | |
360 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
361 | && !resolved_to_zero) | |
362 | || h->root.type != bfd_link_hash_undefweak) | |
382aae06 L |
363 | && ((bfd_link_pic (info) |
364 | && !(h->dynindx == -1 | |
365 | && ABS_SYMBOL_P (h))) | |
b9ce864c L |
366 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
367 | htab->elf.srelgot->size += htab->sizeof_reloc; | |
368 | if (GOT_TLS_GDESC_P (tls_type)) | |
0e30d991 L |
369 | { |
370 | htab->elf.srelplt->size += htab->sizeof_reloc; | |
371 | if (bed->target_id == X86_64_ELF_DATA) | |
372 | htab->tlsdesc_plt = (bfd_vma) -1; | |
373 | } | |
b9ce864c L |
374 | } |
375 | else | |
376 | h->got.offset = (bfd_vma) -1; | |
377 | ||
378 | if (eh->dyn_relocs == NULL) | |
379 | return TRUE; | |
380 | ||
381 | /* In the shared -Bsymbolic case, discard space allocated for | |
382 | dynamic pc-relative relocs against symbols which turn out to be | |
383 | defined in regular objects. For the normal shared case, discard | |
384 | space for pc-relative relocs that have become local due to symbol | |
385 | visibility changes. */ | |
386 | ||
387 | if (bfd_link_pic (info)) | |
388 | { | |
389 | /* Relocs that use pc_count are those that appear on a call | |
390 | insn, or certain REL relocs that can generated via assembly. | |
391 | We want calls to protected symbols to resolve directly to the | |
392 | function rather than going via the plt. If people want | |
393 | function pointer comparisons to work as expected then they | |
394 | should avoid writing weird assembly. */ | |
395 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
396 | { | |
397 | struct elf_dyn_relocs **pp; | |
398 | ||
399 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
400 | { | |
401 | p->count -= p->pc_count; | |
402 | p->pc_count = 0; | |
403 | if (p->count == 0) | |
404 | *pp = p->next; | |
405 | else | |
406 | pp = &p->next; | |
407 | } | |
408 | } | |
409 | ||
851b6fa1 | 410 | if (htab->target_os == is_vxworks) |
b9ce864c L |
411 | { |
412 | struct elf_dyn_relocs **pp; | |
413 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
414 | { | |
415 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
416 | *pp = p->next; | |
417 | else | |
418 | pp = &p->next; | |
419 | } | |
420 | } | |
421 | ||
422 | /* Also discard relocs on undefined weak syms with non-default | |
423 | visibility or in PIE. */ | |
424 | if (eh->dyn_relocs != NULL) | |
425 | { | |
426 | if (h->root.type == bfd_link_hash_undefweak) | |
427 | { | |
428 | /* Undefined weak symbol is never bound locally in shared | |
429 | library. */ | |
430 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
431 | || resolved_to_zero) | |
432 | { | |
433 | if (bed->target_id == I386_ELF_DATA | |
434 | && h->non_got_ref) | |
435 | { | |
436 | /* Keep dynamic non-GOT/non-PLT relocation so | |
437 | that we can branch to 0 without PLT. */ | |
438 | struct elf_dyn_relocs **pp; | |
439 | ||
440 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
441 | if (p->pc_count == 0) | |
442 | *pp = p->next; | |
443 | else | |
444 | { | |
445 | /* Remove non-R_386_PC32 relocation. */ | |
446 | p->count = p->pc_count; | |
447 | pp = &p->next; | |
448 | } | |
449 | ||
450 | /* Make sure undefined weak symbols are output | |
451 | as dynamic symbols in PIEs for dynamic non-GOT | |
452 | non-PLT reloations. */ | |
453 | if (eh->dyn_relocs != NULL | |
454 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
455 | return FALSE; | |
456 | } | |
457 | else | |
458 | eh->dyn_relocs = NULL; | |
459 | } | |
460 | else if (h->dynindx == -1 | |
461 | && !h->forced_local | |
462 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
463 | return FALSE; | |
464 | } | |
465 | else if (bfd_link_executable (info) | |
466 | && (h->needs_copy || eh->needs_copy) | |
467 | && h->def_dynamic | |
468 | && !h->def_regular) | |
469 | { | |
470 | /* NB: needs_copy is set only for x86-64. For PIE, | |
471 | discard space for pc-relative relocs against symbols | |
472 | which turn out to need copy relocs. */ | |
473 | struct elf_dyn_relocs **pp; | |
474 | ||
475 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
476 | { | |
477 | if (p->pc_count != 0) | |
478 | *pp = p->next; | |
479 | else | |
480 | pp = &p->next; | |
481 | } | |
482 | } | |
483 | } | |
484 | } | |
485 | else if (ELIMINATE_COPY_RELOCS) | |
486 | { | |
487 | /* For the non-shared case, discard space for relocs against | |
488 | symbols which turn out to need copy relocs or are not | |
489 | dynamic. Keep dynamic relocations for run-time function | |
490 | pointer initialization. */ | |
491 | ||
492 | if ((!h->non_got_ref | |
b9ce864c L |
493 | || (h->root.type == bfd_link_hash_undefweak |
494 | && !resolved_to_zero)) | |
495 | && ((h->def_dynamic | |
496 | && !h->def_regular) | |
497 | || (htab->elf.dynamic_sections_created | |
498 | && (h->root.type == bfd_link_hash_undefweak | |
499 | || h->root.type == bfd_link_hash_undefined)))) | |
500 | { | |
501 | /* Make sure this symbol is output as a dynamic symbol. | |
502 | Undefined weak syms won't yet be marked as dynamic. */ | |
503 | if (h->dynindx == -1 | |
504 | && !h->forced_local | |
505 | && !resolved_to_zero | |
506 | && h->root.type == bfd_link_hash_undefweak | |
507 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
508 | return FALSE; | |
509 | ||
510 | /* If that succeeded, we know we'll be keeping all the | |
511 | relocs. */ | |
512 | if (h->dynindx != -1) | |
513 | goto keep; | |
514 | } | |
515 | ||
516 | eh->dyn_relocs = NULL; | |
b9ce864c L |
517 | |
518 | keep: ; | |
519 | } | |
520 | ||
521 | /* Finally, allocate space. */ | |
522 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
523 | { | |
524 | asection *sreloc; | |
525 | ||
526 | sreloc = elf_section_data (p->sec)->sreloc; | |
527 | ||
528 | BFD_ASSERT (sreloc != NULL); | |
529 | sreloc->size += p->count * htab->sizeof_reloc; | |
530 | } | |
531 | ||
532 | return TRUE; | |
533 | } | |
534 | ||
826c3f1e | 535 | /* Find dynamic relocs for H that apply to read-only sections. */ |
0afcef53 | 536 | |
826c3f1e AM |
537 | static asection * |
538 | readonly_dynrelocs (struct elf_link_hash_entry *h) | |
0afcef53 | 539 | { |
0afcef53 L |
540 | struct elf_dyn_relocs *p; |
541 | ||
826c3f1e | 542 | for (p = elf_x86_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) |
0afcef53 L |
543 | { |
544 | asection *s = p->sec->output_section; | |
545 | ||
546 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
826c3f1e AM |
547 | return p->sec; |
548 | } | |
549 | return NULL; | |
550 | } | |
0afcef53 | 551 | |
826c3f1e AM |
552 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to |
553 | read-only sections. */ | |
0afcef53 | 554 | |
826c3f1e AM |
555 | static bfd_boolean |
556 | maybe_set_textrel (struct elf_link_hash_entry *h, void *inf) | |
557 | { | |
558 | asection *sec; | |
0afcef53 | 559 | |
826c3f1e AM |
560 | if (h->root.type == bfd_link_hash_indirect) |
561 | return TRUE; | |
562 | ||
563 | /* Skip local IFUNC symbols. */ | |
564 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
565 | return TRUE; | |
566 | ||
567 | sec = readonly_dynrelocs (h); | |
568 | if (sec != NULL) | |
569 | { | |
570 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
571 | ||
572 | info->flags |= DF_TEXTREL; | |
573 | /* xgettext:c-format */ | |
c1c8c1ef | 574 | info->callbacks->minfo (_("%pB: dynamic relocation against `%pT' " |
871b3ab2 | 575 | "in read-only section `%pA'\n"), |
826c3f1e AM |
576 | sec->owner, h->root.root.string, sec); |
577 | ||
a6dbf402 | 578 | if (bfd_link_textrel_check (info)) |
826c3f1e | 579 | /* xgettext:c-format */ |
871b3ab2 AM |
580 | info->callbacks->einfo (_("%P: %pB: warning: relocation against `%s' " |
581 | "in read-only section `%pA'\n"), | |
826c3f1e AM |
582 | sec->owner, h->root.root.string, sec); |
583 | ||
584 | /* Not an error, just cut short the traversal. */ | |
585 | return FALSE; | |
0afcef53 L |
586 | } |
587 | return TRUE; | |
588 | } | |
589 | ||
b9ce864c L |
590 | /* Allocate space in .plt, .got and associated reloc sections for |
591 | local dynamic relocs. */ | |
592 | ||
5e2ac45d L |
593 | static bfd_boolean |
594 | elf_x86_allocate_local_dynreloc (void **slot, void *inf) | |
b9ce864c L |
595 | { |
596 | struct elf_link_hash_entry *h | |
597 | = (struct elf_link_hash_entry *) *slot; | |
598 | ||
599 | if (h->type != STT_GNU_IFUNC | |
600 | || !h->def_regular | |
601 | || !h->ref_regular | |
602 | || !h->forced_local | |
603 | || h->root.type != bfd_link_hash_defined) | |
604 | abort (); | |
605 | ||
5e2ac45d | 606 | return elf_x86_allocate_dynrelocs (h, inf); |
b9ce864c L |
607 | } |
608 | ||
0afcef53 L |
609 | /* Find and/or create a hash entry for local symbol. */ |
610 | ||
611 | struct elf_link_hash_entry * | |
612 | _bfd_elf_x86_get_local_sym_hash (struct elf_x86_link_hash_table *htab, | |
613 | bfd *abfd, const Elf_Internal_Rela *rel, | |
614 | bfd_boolean create) | |
615 | { | |
616 | struct elf_x86_link_hash_entry e, *ret; | |
617 | asection *sec = abfd->sections; | |
618 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, | |
619 | htab->r_sym (rel->r_info)); | |
620 | void **slot; | |
621 | ||
622 | e.elf.indx = sec->id; | |
623 | e.elf.dynstr_index = htab->r_sym (rel->r_info); | |
624 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
625 | create ? INSERT : NO_INSERT); | |
626 | ||
627 | if (!slot) | |
628 | return NULL; | |
629 | ||
630 | if (*slot) | |
631 | { | |
632 | ret = (struct elf_x86_link_hash_entry *) *slot; | |
633 | return &ret->elf; | |
634 | } | |
635 | ||
636 | ret = (struct elf_x86_link_hash_entry *) | |
637 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
638 | sizeof (struct elf_x86_link_hash_entry)); | |
639 | if (ret) | |
640 | { | |
641 | memset (ret, 0, sizeof (*ret)); | |
642 | ret->elf.indx = sec->id; | |
643 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); | |
644 | ret->elf.dynindx = -1; | |
645 | ret->plt_got.offset = (bfd_vma) -1; | |
646 | *slot = ret; | |
647 | } | |
648 | return &ret->elf; | |
649 | } | |
650 | ||
651 | /* Create an entry in a x86 ELF linker hash table. NB: THIS MUST BE IN | |
652 | SYNC WITH _bfd_elf_link_hash_newfunc. */ | |
653 | ||
654 | struct bfd_hash_entry * | |
655 | _bfd_x86_elf_link_hash_newfunc (struct bfd_hash_entry *entry, | |
656 | struct bfd_hash_table *table, | |
657 | const char *string) | |
658 | { | |
659 | /* Allocate the structure if it has not already been allocated by a | |
660 | subclass. */ | |
661 | if (entry == NULL) | |
662 | { | |
663 | entry = (struct bfd_hash_entry *) | |
664 | bfd_hash_allocate (table, | |
665 | sizeof (struct elf_x86_link_hash_entry)); | |
666 | if (entry == NULL) | |
667 | return entry; | |
668 | } | |
669 | ||
670 | /* Call the allocation method of the superclass. */ | |
671 | entry = _bfd_link_hash_newfunc (entry, table, string); | |
672 | if (entry != NULL) | |
673 | { | |
674 | struct elf_x86_link_hash_entry *eh | |
675 | = (struct elf_x86_link_hash_entry *) entry; | |
676 | struct elf_link_hash_table *htab | |
677 | = (struct elf_link_hash_table *) table; | |
678 | ||
679 | memset (&eh->elf.size, 0, | |
680 | (sizeof (struct elf_x86_link_hash_entry) | |
681 | - offsetof (struct elf_link_hash_entry, size))); | |
682 | /* Set local fields. */ | |
683 | eh->elf.indx = -1; | |
684 | eh->elf.dynindx = -1; | |
685 | eh->elf.got = htab->init_got_refcount; | |
686 | eh->elf.plt = htab->init_plt_refcount; | |
687 | /* Assume that we have been called by a non-ELF symbol reader. | |
688 | This flag is then reset by the code which reads an ELF input | |
689 | file. This ensures that a symbol created by a non-ELF symbol | |
690 | reader will have the flag set correctly. */ | |
691 | eh->elf.non_elf = 1; | |
692 | eh->plt_second.offset = (bfd_vma) -1; | |
693 | eh->plt_got.offset = (bfd_vma) -1; | |
694 | eh->tlsdesc_got = (bfd_vma) -1; | |
98b273dc | 695 | eh->zero_undefweak = 1; |
0afcef53 L |
696 | } |
697 | ||
698 | return entry; | |
699 | } | |
700 | ||
701 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry | |
702 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
703 | as global symbol. We reuse indx and dynstr_index for local symbol | |
704 | hash since they aren't used by global symbols in this backend. */ | |
705 | ||
706 | hashval_t | |
707 | _bfd_x86_elf_local_htab_hash (const void *ptr) | |
708 | { | |
709 | struct elf_link_hash_entry *h | |
710 | = (struct elf_link_hash_entry *) ptr; | |
711 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); | |
712 | } | |
713 | ||
714 | /* Compare local hash entries. */ | |
715 | ||
716 | int | |
717 | _bfd_x86_elf_local_htab_eq (const void *ptr1, const void *ptr2) | |
718 | { | |
719 | struct elf_link_hash_entry *h1 | |
720 | = (struct elf_link_hash_entry *) ptr1; | |
721 | struct elf_link_hash_entry *h2 | |
722 | = (struct elf_link_hash_entry *) ptr2; | |
723 | ||
724 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
725 | } | |
726 | ||
727 | /* Destroy an x86 ELF linker hash table. */ | |
728 | ||
765e526c L |
729 | static void |
730 | elf_x86_link_hash_table_free (bfd *obfd) | |
0afcef53 L |
731 | { |
732 | struct elf_x86_link_hash_table *htab | |
733 | = (struct elf_x86_link_hash_table *) obfd->link.hash; | |
734 | ||
735 | if (htab->loc_hash_table) | |
736 | htab_delete (htab->loc_hash_table); | |
737 | if (htab->loc_hash_memory) | |
738 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
739 | _bfd_elf_link_hash_table_free (obfd); | |
740 | } | |
741 | ||
5e2ac45d L |
742 | static bfd_boolean |
743 | elf_i386_is_reloc_section (const char *secname) | |
744 | { | |
745 | return CONST_STRNEQ (secname, ".rel"); | |
746 | } | |
747 | ||
5e2ac45d L |
748 | static bfd_boolean |
749 | elf_x86_64_is_reloc_section (const char *secname) | |
750 | { | |
751 | return CONST_STRNEQ (secname, ".rela"); | |
752 | } | |
5e2ac45d | 753 | |
765e526c L |
754 | /* Create an x86 ELF linker hash table. */ |
755 | ||
756 | struct bfd_link_hash_table * | |
757 | _bfd_x86_elf_link_hash_table_create (bfd *abfd) | |
758 | { | |
759 | struct elf_x86_link_hash_table *ret; | |
760 | const struct elf_backend_data *bed; | |
986f0783 | 761 | size_t amt = sizeof (struct elf_x86_link_hash_table); |
765e526c L |
762 | |
763 | ret = (struct elf_x86_link_hash_table *) bfd_zmalloc (amt); | |
764 | if (ret == NULL) | |
765 | return NULL; | |
766 | ||
767 | bed = get_elf_backend_data (abfd); | |
768 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, | |
769 | _bfd_x86_elf_link_hash_newfunc, | |
770 | sizeof (struct elf_x86_link_hash_entry), | |
771 | bed->target_id)) | |
772 | { | |
773 | free (ret); | |
774 | return NULL; | |
775 | } | |
776 | ||
5e2ac45d L |
777 | if (bed->target_id == X86_64_ELF_DATA) |
778 | { | |
5e2ac45d L |
779 | ret->is_reloc_section = elf_x86_64_is_reloc_section; |
780 | ret->dt_reloc = DT_RELA; | |
781 | ret->dt_reloc_sz = DT_RELASZ; | |
782 | ret->dt_reloc_ent = DT_RELAENT; | |
783 | ret->got_entry_size = 8; | |
451875b4 | 784 | ret->pcrel_plt = TRUE; |
f04bdfa7 | 785 | ret->tls_get_addr = "__tls_get_addr"; |
5e2ac45d | 786 | } |
765e526c L |
787 | if (ABI_64_P (abfd)) |
788 | { | |
503294e7 | 789 | ret->sizeof_reloc = sizeof (Elf64_External_Rela); |
765e526c L |
790 | ret->pointer_r_type = R_X86_64_64; |
791 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; | |
792 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
765e526c L |
793 | } |
794 | else | |
765e526c | 795 | { |
5b86dbf4 | 796 | if (bed->target_id == X86_64_ELF_DATA) |
765e526c | 797 | { |
503294e7 | 798 | ret->sizeof_reloc = sizeof (Elf32_External_Rela); |
765e526c L |
799 | ret->pointer_r_type = R_X86_64_32; |
800 | ret->dynamic_interpreter = ELFX32_DYNAMIC_INTERPRETER; | |
801 | ret->dynamic_interpreter_size | |
802 | = sizeof ELFX32_DYNAMIC_INTERPRETER; | |
765e526c L |
803 | } |
804 | else | |
805 | { | |
5e2ac45d L |
806 | ret->is_reloc_section = elf_i386_is_reloc_section; |
807 | ret->dt_reloc = DT_REL; | |
808 | ret->dt_reloc_sz = DT_RELSZ; | |
809 | ret->dt_reloc_ent = DT_RELENT; | |
503294e7 | 810 | ret->sizeof_reloc = sizeof (Elf32_External_Rel); |
9ff114ca | 811 | ret->got_entry_size = 4; |
451875b4 | 812 | ret->pcrel_plt = FALSE; |
765e526c L |
813 | ret->pointer_r_type = R_386_32; |
814 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; | |
815 | ret->dynamic_interpreter_size | |
816 | = sizeof ELF32_DYNAMIC_INTERPRETER; | |
817 | ret->tls_get_addr = "___tls_get_addr"; | |
818 | } | |
819 | } | |
fe53b4a4 | 820 | ret->target_id = bed->target_id; |
851b6fa1 | 821 | ret->target_os = get_elf_x86_backend_data (abfd)->target_os; |
765e526c L |
822 | |
823 | ret->loc_hash_table = htab_try_create (1024, | |
824 | _bfd_x86_elf_local_htab_hash, | |
825 | _bfd_x86_elf_local_htab_eq, | |
826 | NULL); | |
827 | ret->loc_hash_memory = objalloc_create (); | |
828 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
829 | { | |
830 | elf_x86_link_hash_table_free (abfd); | |
831 | return NULL; | |
832 | } | |
833 | ret->elf.root.hash_table_free = elf_x86_link_hash_table_free; | |
834 | ||
835 | return &ret->elf.root; | |
836 | } | |
837 | ||
0afcef53 L |
838 | /* Sort relocs into address order. */ |
839 | ||
840 | int | |
841 | _bfd_x86_elf_compare_relocs (const void *ap, const void *bp) | |
842 | { | |
843 | const arelent *a = * (const arelent **) ap; | |
844 | const arelent *b = * (const arelent **) bp; | |
845 | ||
846 | if (a->address > b->address) | |
847 | return 1; | |
848 | else if (a->address < b->address) | |
849 | return -1; | |
850 | else | |
851 | return 0; | |
852 | } | |
853 | ||
9bc935ef L |
854 | /* Mark symbol, NAME, as locally defined by linker if it is referenced |
855 | and not defined in a relocatable object file. */ | |
856 | ||
857 | static void | |
858 | elf_x86_linker_defined (struct bfd_link_info *info, const char *name) | |
859 | { | |
860 | struct elf_link_hash_entry *h; | |
861 | ||
862 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
863 | FALSE, FALSE, FALSE); | |
864 | if (h == NULL) | |
865 | return; | |
866 | ||
867 | while (h->root.type == bfd_link_hash_indirect) | |
868 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
869 | ||
870 | if (h->root.type == bfd_link_hash_new | |
871 | || h->root.type == bfd_link_hash_undefined | |
872 | || h->root.type == bfd_link_hash_undefweak | |
873 | || h->root.type == bfd_link_hash_common | |
874 | || (!h->def_regular && h->def_dynamic)) | |
875 | { | |
876 | elf_x86_hash_entry (h)->local_ref = 2; | |
877 | elf_x86_hash_entry (h)->linker_def = 1; | |
878 | } | |
879 | } | |
880 | ||
ecf99cc0 L |
881 | /* Hide a linker-defined symbol, NAME, with hidden visibility. */ |
882 | ||
883 | static void | |
884 | elf_x86_hide_linker_defined (struct bfd_link_info *info, | |
885 | const char *name) | |
886 | { | |
887 | struct elf_link_hash_entry *h; | |
888 | ||
889 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
890 | FALSE, FALSE, FALSE); | |
891 | if (h == NULL) | |
892 | return; | |
893 | ||
894 | while (h->root.type == bfd_link_hash_indirect) | |
895 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
896 | ||
897 | if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL | |
898 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) | |
899 | _bfd_elf_link_hash_hide_symbol (info, h, TRUE); | |
900 | } | |
901 | ||
0afcef53 L |
902 | bfd_boolean |
903 | _bfd_x86_elf_link_check_relocs (bfd *abfd, struct bfd_link_info *info) | |
904 | { | |
905 | if (!bfd_link_relocatable (info)) | |
906 | { | |
907 | /* Check for __tls_get_addr reference. */ | |
908 | struct elf_x86_link_hash_table *htab; | |
909 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
910 | htab = elf_x86_hash_table (info, bed->target_id); | |
911 | if (htab) | |
912 | { | |
0a27fed7 L |
913 | struct elf_link_hash_entry *h; |
914 | ||
915 | h = elf_link_hash_lookup (elf_hash_table (info), | |
0afcef53 L |
916 | htab->tls_get_addr, |
917 | FALSE, FALSE, FALSE); | |
918 | if (h != NULL) | |
8a1b824a L |
919 | { |
920 | elf_x86_hash_entry (h)->tls_get_addr = 1; | |
921 | ||
922 | /* Check the versioned __tls_get_addr symbol. */ | |
923 | while (h->root.type == bfd_link_hash_indirect) | |
924 | { | |
925 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
926 | elf_x86_hash_entry (h)->tls_get_addr = 1; | |
927 | } | |
928 | } | |
0a27fed7 L |
929 | |
930 | /* "__ehdr_start" will be defined by linker as a hidden symbol | |
931 | later if it is referenced and not defined. */ | |
9bc935ef L |
932 | elf_x86_linker_defined (info, "__ehdr_start"); |
933 | ||
934 | if (bfd_link_executable (info)) | |
0a27fed7 | 935 | { |
9bc935ef L |
936 | /* References to __bss_start, _end and _edata should be |
937 | locally resolved within executables. */ | |
938 | elf_x86_linker_defined (info, "__bss_start"); | |
939 | elf_x86_linker_defined (info, "_end"); | |
940 | elf_x86_linker_defined (info, "_edata"); | |
ecf99cc0 L |
941 | } |
942 | else | |
943 | { | |
944 | /* Hide hidden __bss_start, _end and _edata in shared | |
945 | libraries. */ | |
946 | elf_x86_hide_linker_defined (info, "__bss_start"); | |
947 | elf_x86_hide_linker_defined (info, "_end"); | |
948 | elf_x86_hide_linker_defined (info, "_edata"); | |
0a27fed7 | 949 | } |
0afcef53 L |
950 | } |
951 | } | |
952 | ||
953 | /* Invoke the regular ELF backend linker to do all the work. */ | |
954 | return _bfd_elf_link_check_relocs (abfd, info); | |
955 | } | |
956 | ||
382aae06 L |
957 | bfd_boolean |
958 | _bfd_elf_x86_valid_reloc_p (asection *input_section, | |
959 | struct bfd_link_info *info, | |
960 | struct elf_x86_link_hash_table *htab, | |
961 | const Elf_Internal_Rela *rel, | |
962 | struct elf_link_hash_entry *h, | |
963 | Elf_Internal_Sym *sym, | |
964 | Elf_Internal_Shdr *symtab_hdr, | |
965 | bfd_boolean *no_dynreloc_p) | |
966 | { | |
967 | bfd_boolean valid_p = TRUE; | |
968 | ||
969 | *no_dynreloc_p = FALSE; | |
970 | ||
971 | /* Check If relocation against non-preemptible absolute symbol is | |
972 | valid in PIC. FIXME: Can't use SYMBOL_REFERENCES_LOCAL_P since | |
973 | it may call _bfd_elf_link_hide_sym_by_version and result in | |
974 | ld-elfvers/ vers21 test failure. */ | |
975 | if (bfd_link_pic (info) | |
976 | && (h == NULL || SYMBOL_REFERENCES_LOCAL (info, h))) | |
977 | { | |
978 | const struct elf_backend_data *bed; | |
979 | unsigned int r_type; | |
980 | Elf_Internal_Rela irel; | |
981 | ||
982 | /* Skip non-absolute symbol. */ | |
983 | if (h) | |
984 | { | |
985 | if (!ABS_SYMBOL_P (h)) | |
986 | return valid_p; | |
987 | } | |
988 | else if (sym->st_shndx != SHN_ABS) | |
989 | return valid_p; | |
990 | ||
991 | bed = get_elf_backend_data (input_section->owner); | |
992 | r_type = ELF32_R_TYPE (rel->r_info); | |
993 | irel = *rel; | |
994 | ||
995 | /* Only allow relocations against absolute symbol, which can be | |
996 | resolved as absolute value + addend. GOTPCREL relocations | |
997 | are allowed since absolute value + addend is stored in the | |
998 | GOT slot. */ | |
999 | if (bed->target_id == X86_64_ELF_DATA) | |
1000 | { | |
1001 | r_type &= ~R_X86_64_converted_reloc_bit; | |
1002 | valid_p = (r_type == R_X86_64_64 | |
1003 | || r_type == R_X86_64_32 | |
1004 | || r_type == R_X86_64_32S | |
1005 | || r_type == R_X86_64_16 | |
1006 | || r_type == R_X86_64_8 | |
1007 | || r_type == R_X86_64_GOTPCREL | |
1008 | || r_type == R_X86_64_GOTPCRELX | |
1009 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1010 | if (!valid_p) | |
1011 | { | |
1012 | unsigned int r_symndx = htab->r_sym (rel->r_info); | |
1013 | irel.r_info = htab->r_info (r_symndx, r_type); | |
1014 | } | |
1015 | } | |
1016 | else | |
1017 | valid_p = (r_type == R_386_32 | |
1018 | || r_type == R_386_16 | |
1019 | || r_type == R_386_8); | |
1020 | ||
1021 | if (valid_p) | |
1022 | *no_dynreloc_p = TRUE; | |
1023 | else | |
1024 | { | |
1025 | const char *name; | |
1026 | arelent internal_reloc; | |
1027 | ||
1028 | if (!bed->elf_info_to_howto (input_section->owner, | |
1029 | &internal_reloc, &irel) | |
1030 | || internal_reloc.howto == NULL) | |
1031 | abort (); | |
1032 | ||
1033 | if (h) | |
1034 | name = h->root.root.string; | |
1035 | else | |
1036 | name = bfd_elf_sym_name (input_section->owner, symtab_hdr, | |
1037 | sym, NULL); | |
1038 | info->callbacks->einfo | |
1039 | /* xgettext:c-format */ | |
1040 | (_("%F%P: %pB: relocation %s against absolute symbol " | |
1041 | "`%s' in section `%pA' is disallowed\n"), | |
1042 | input_section->owner, internal_reloc.howto->name, name, | |
1043 | input_section); | |
1044 | bfd_set_error (bfd_error_bad_value); | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | return valid_p; | |
1049 | } | |
1050 | ||
5e2ac45d L |
1051 | /* Set the sizes of the dynamic sections. */ |
1052 | ||
1053 | bfd_boolean | |
1054 | _bfd_x86_elf_size_dynamic_sections (bfd *output_bfd, | |
1055 | struct bfd_link_info *info) | |
1056 | { | |
1057 | struct elf_x86_link_hash_table *htab; | |
1058 | bfd *dynobj; | |
1059 | asection *s; | |
1060 | bfd_boolean relocs; | |
1061 | bfd *ibfd; | |
1062 | const struct elf_backend_data *bed | |
1063 | = get_elf_backend_data (output_bfd); | |
1064 | ||
1065 | htab = elf_x86_hash_table (info, bed->target_id); | |
1066 | if (htab == NULL) | |
1067 | return FALSE; | |
1068 | dynobj = htab->elf.dynobj; | |
1069 | if (dynobj == NULL) | |
1070 | abort (); | |
1071 | ||
1072 | /* Set up .got offsets for local syms, and space for local dynamic | |
1073 | relocs. */ | |
1074 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
1075 | { | |
1076 | bfd_signed_vma *local_got; | |
1077 | bfd_signed_vma *end_local_got; | |
1078 | char *local_tls_type; | |
1079 | bfd_vma *local_tlsdesc_gotent; | |
1080 | bfd_size_type locsymcount; | |
1081 | Elf_Internal_Shdr *symtab_hdr; | |
1082 | asection *srel; | |
1083 | ||
1084 | if (! is_x86_elf (ibfd, htab)) | |
1085 | continue; | |
1086 | ||
1087 | for (s = ibfd->sections; s != NULL; s = s->next) | |
1088 | { | |
1089 | struct elf_dyn_relocs *p; | |
1090 | ||
5e2ac45d L |
1091 | for (p = ((struct elf_dyn_relocs *) |
1092 | elf_section_data (s)->local_dynrel); | |
1093 | p != NULL; | |
1094 | p = p->next) | |
1095 | { | |
1096 | if (!bfd_is_abs_section (p->sec) | |
1097 | && bfd_is_abs_section (p->sec->output_section)) | |
1098 | { | |
1099 | /* Input section has been discarded, either because | |
1100 | it is a copy of a linkonce section or due to | |
1101 | linker script /DISCARD/, so we'll be discarding | |
1102 | the relocs too. */ | |
1103 | } | |
851b6fa1 | 1104 | else if (htab->target_os == is_vxworks |
5e2ac45d L |
1105 | && strcmp (p->sec->output_section->name, |
1106 | ".tls_vars") == 0) | |
1107 | { | |
1108 | /* Relocations in vxworks .tls_vars sections are | |
1109 | handled specially by the loader. */ | |
1110 | } | |
1111 | else if (p->count != 0) | |
1112 | { | |
1113 | srel = elf_section_data (p->sec)->sreloc; | |
1114 | srel->size += p->count * htab->sizeof_reloc; | |
1115 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 | |
1116 | && (info->flags & DF_TEXTREL) == 0) | |
1117 | { | |
1118 | info->flags |= DF_TEXTREL; | |
a6dbf402 | 1119 | if (bfd_link_textrel_check (info)) |
5e2ac45d | 1120 | /* xgettext:c-format */ |
826c3f1e | 1121 | info->callbacks->einfo |
871b3ab2 AM |
1122 | (_("%P: %pB: warning: relocation " |
1123 | "in read-only section `%pA'\n"), | |
826c3f1e | 1124 | p->sec->owner, p->sec); |
5e2ac45d L |
1125 | } |
1126 | } | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | local_got = elf_local_got_refcounts (ibfd); | |
1131 | if (!local_got) | |
1132 | continue; | |
1133 | ||
1134 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
1135 | locsymcount = symtab_hdr->sh_info; | |
1136 | end_local_got = local_got + locsymcount; | |
1137 | local_tls_type = elf_x86_local_got_tls_type (ibfd); | |
1138 | local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd); | |
1139 | s = htab->elf.sgot; | |
1140 | srel = htab->elf.srelgot; | |
1141 | for (; local_got < end_local_got; | |
1142 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
1143 | { | |
1144 | *local_tlsdesc_gotent = (bfd_vma) -1; | |
1145 | if (*local_got > 0) | |
1146 | { | |
1147 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
1148 | { | |
1149 | *local_tlsdesc_gotent = htab->elf.sgotplt->size | |
1150 | - elf_x86_compute_jump_table_size (htab); | |
1151 | htab->elf.sgotplt->size += 2 * htab->got_entry_size; | |
1152 | *local_got = (bfd_vma) -2; | |
1153 | } | |
1154 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
1155 | || GOT_TLS_GD_P (*local_tls_type)) | |
1156 | { | |
1157 | *local_got = s->size; | |
1158 | s->size += htab->got_entry_size; | |
1159 | if (GOT_TLS_GD_P (*local_tls_type) | |
1160 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
1161 | s->size += htab->got_entry_size; | |
1162 | } | |
382aae06 | 1163 | if ((bfd_link_pic (info) && *local_tls_type != GOT_ABS) |
5e2ac45d L |
1164 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
1165 | || (*local_tls_type & GOT_TLS_IE)) | |
1166 | { | |
1167 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
1168 | srel->size += 2 * htab->sizeof_reloc; | |
1169 | else if (GOT_TLS_GD_P (*local_tls_type) | |
1170 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
1171 | srel->size += htab->sizeof_reloc; | |
1172 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
1173 | { | |
1174 | htab->elf.srelplt->size += htab->sizeof_reloc; | |
1175 | if (bed->target_id == X86_64_ELF_DATA) | |
1176 | htab->tlsdesc_plt = (bfd_vma) -1; | |
1177 | } | |
1178 | } | |
1179 | } | |
1180 | else | |
1181 | *local_got = (bfd_vma) -1; | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | if (htab->tls_ld_or_ldm_got.refcount > 0) | |
1186 | { | |
1187 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
07d6d2b8 | 1188 | or R_X86_64_TLSLD relocs. */ |
5e2ac45d L |
1189 | htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size; |
1190 | htab->elf.sgot->size += 2 * htab->got_entry_size; | |
1191 | htab->elf.srelgot->size += htab->sizeof_reloc; | |
1192 | } | |
1193 | else | |
1194 | htab->tls_ld_or_ldm_got.offset = -1; | |
1195 | ||
1196 | /* Allocate global sym .plt and .got entries, and space for global | |
1197 | sym dynamic relocs. */ | |
1198 | elf_link_hash_traverse (&htab->elf, elf_x86_allocate_dynrelocs, | |
1199 | info); | |
1200 | ||
1201 | /* Allocate .plt and .got entries, and space for local symbols. */ | |
1202 | htab_traverse (htab->loc_hash_table, elf_x86_allocate_local_dynreloc, | |
1203 | info); | |
1204 | ||
1205 | /* For every jump slot reserved in the sgotplt, reloc_count is | |
1206 | incremented. However, when we reserve space for TLS descriptors, | |
1207 | it's not incremented, so in order to compute the space reserved | |
1208 | for them, it suffices to multiply the reloc count by the jump | |
1209 | slot size. | |
1210 | ||
1211 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
1212 | so that R_{386,X86_64}_IRELATIVE entries come last. */ | |
1213 | if (htab->elf.srelplt) | |
1214 | { | |
1215 | htab->next_tls_desc_index = htab->elf.srelplt->reloc_count; | |
1216 | htab->sgotplt_jump_table_size | |
1217 | = elf_x86_compute_jump_table_size (htab); | |
1218 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
1219 | } | |
1220 | else if (htab->elf.irelplt) | |
1221 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
1222 | ||
1223 | if (htab->tlsdesc_plt) | |
1224 | { | |
1225 | /* NB: tlsdesc_plt is set only for x86-64. If we're not using | |
1226 | lazy TLS relocations, don't generate the PLT and GOT entries | |
1227 | they require. */ | |
1228 | if ((info->flags & DF_BIND_NOW)) | |
1229 | htab->tlsdesc_plt = 0; | |
1230 | else | |
1231 | { | |
1232 | htab->tlsdesc_got = htab->elf.sgot->size; | |
1233 | htab->elf.sgot->size += htab->got_entry_size; | |
1234 | /* Reserve room for the initial entry. | |
1235 | FIXME: we could probably do away with it in this case. */ | |
1236 | if (htab->elf.splt->size == 0) | |
1237 | htab->elf.splt->size = htab->plt.plt_entry_size; | |
1238 | htab->tlsdesc_plt = htab->elf.splt->size; | |
1239 | htab->elf.splt->size += htab->plt.plt_entry_size; | |
1240 | } | |
1241 | } | |
1242 | ||
1243 | if (htab->elf.sgotplt) | |
1244 | { | |
1245 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
1246 | entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */ | |
1247 | if ((htab->elf.hgot == NULL | |
cd048363 | 1248 | || !htab->got_referenced) |
5e2ac45d L |
1249 | && (htab->elf.sgotplt->size == bed->got_header_size) |
1250 | && (htab->elf.splt == NULL | |
1251 | || htab->elf.splt->size == 0) | |
1252 | && (htab->elf.sgot == NULL | |
1253 | || htab->elf.sgot->size == 0) | |
1254 | && (htab->elf.iplt == NULL | |
1255 | || htab->elf.iplt->size == 0) | |
1256 | && (htab->elf.igotplt == NULL | |
1257 | || htab->elf.igotplt->size == 0)) | |
cd048363 L |
1258 | { |
1259 | htab->elf.sgotplt->size = 0; | |
3b4c3844 L |
1260 | /* Solaris requires to keep _GLOBAL_OFFSET_TABLE_ even if it |
1261 | isn't used. */ | |
1262 | if (htab->elf.hgot != NULL && htab->target_os != is_solaris) | |
cd048363 L |
1263 | { |
1264 | /* Remove the unused _GLOBAL_OFFSET_TABLE_ from symbol | |
1265 | table. */ | |
1266 | htab->elf.hgot->root.type = bfd_link_hash_undefined; | |
1267 | htab->elf.hgot->root.u.undef.abfd | |
1268 | = htab->elf.hgot->root.u.def.section->owner; | |
1269 | htab->elf.hgot->root.linker_def = 0; | |
1270 | htab->elf.hgot->ref_regular = 0; | |
1271 | htab->elf.hgot->def_regular = 0; | |
1272 | } | |
1273 | } | |
5e2ac45d L |
1274 | } |
1275 | ||
1276 | if (_bfd_elf_eh_frame_present (info)) | |
1277 | { | |
1278 | if (htab->plt_eh_frame != NULL | |
1279 | && htab->elf.splt != NULL | |
1280 | && htab->elf.splt->size != 0 | |
1281 | && !bfd_is_abs_section (htab->elf.splt->output_section)) | |
1282 | htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size; | |
1283 | ||
1284 | if (htab->plt_got_eh_frame != NULL | |
1285 | && htab->plt_got != NULL | |
1286 | && htab->plt_got->size != 0 | |
1287 | && !bfd_is_abs_section (htab->plt_got->output_section)) | |
1288 | htab->plt_got_eh_frame->size | |
1289 | = htab->non_lazy_plt->eh_frame_plt_size; | |
1290 | ||
1291 | /* Unwind info for the second PLT and .plt.got sections are | |
1292 | identical. */ | |
1293 | if (htab->plt_second_eh_frame != NULL | |
1294 | && htab->plt_second != NULL | |
1295 | && htab->plt_second->size != 0 | |
1296 | && !bfd_is_abs_section (htab->plt_second->output_section)) | |
1297 | htab->plt_second_eh_frame->size | |
1298 | = htab->non_lazy_plt->eh_frame_plt_size; | |
1299 | } | |
1300 | ||
1301 | /* We now have determined the sizes of the various dynamic sections. | |
1302 | Allocate memory for them. */ | |
1303 | relocs = FALSE; | |
1304 | for (s = dynobj->sections; s != NULL; s = s->next) | |
1305 | { | |
1306 | bfd_boolean strip_section = TRUE; | |
1307 | ||
1308 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1309 | continue; | |
1310 | ||
1311 | if (s == htab->elf.splt | |
1312 | || s == htab->elf.sgot) | |
1313 | { | |
1314 | /* Strip this section if we don't need it; see the | |
1315 | comment below. */ | |
1316 | /* We'd like to strip these sections if they aren't needed, but if | |
1317 | we've exported dynamic symbols from them we must leave them. | |
1318 | It's too late to tell BFD to get rid of the symbols. */ | |
1319 | ||
1320 | if (htab->elf.hplt != NULL) | |
1321 | strip_section = FALSE; | |
1322 | } | |
1323 | else if (s == htab->elf.sgotplt | |
1324 | || s == htab->elf.iplt | |
1325 | || s == htab->elf.igotplt | |
1326 | || s == htab->plt_second | |
1327 | || s == htab->plt_got | |
1328 | || s == htab->plt_eh_frame | |
1329 | || s == htab->plt_got_eh_frame | |
1330 | || s == htab->plt_second_eh_frame | |
1331 | || s == htab->elf.sdynbss | |
1332 | || s == htab->elf.sdynrelro) | |
1333 | { | |
1334 | /* Strip these too. */ | |
1335 | } | |
fd361982 | 1336 | else if (htab->is_reloc_section (bfd_section_name (s))) |
5e2ac45d L |
1337 | { |
1338 | if (s->size != 0 | |
1339 | && s != htab->elf.srelplt | |
1340 | && s != htab->srelplt2) | |
1341 | relocs = TRUE; | |
1342 | ||
1343 | /* We use the reloc_count field as a counter if we need | |
1344 | to copy relocs into the output file. */ | |
1345 | if (s != htab->elf.srelplt) | |
1346 | s->reloc_count = 0; | |
1347 | } | |
1348 | else | |
1349 | { | |
1350 | /* It's not one of our sections, so don't allocate space. */ | |
1351 | continue; | |
1352 | } | |
1353 | ||
1354 | if (s->size == 0) | |
1355 | { | |
1356 | /* If we don't need this section, strip it from the | |
1357 | output file. This is mostly to handle .rel.bss and | |
1358 | .rel.plt. We must create both sections in | |
1359 | create_dynamic_sections, because they must be created | |
1360 | before the linker maps input sections to output | |
1361 | sections. The linker does that before | |
1362 | adjust_dynamic_symbol is called, and it is that | |
1363 | function which decides whether anything needs to go | |
1364 | into these sections. */ | |
1365 | if (strip_section) | |
1366 | s->flags |= SEC_EXCLUDE; | |
1367 | continue; | |
1368 | } | |
1369 | ||
1370 | if ((s->flags & SEC_HAS_CONTENTS) == 0) | |
1371 | continue; | |
1372 | ||
b44ee3a8 L |
1373 | /* NB: Initially, the iplt section has minimal alignment to |
1374 | avoid moving dot of the following section backwards when | |
1375 | it is empty. Update its section alignment now since it | |
1376 | is non-empty. */ | |
1377 | if (s == htab->elf.iplt) | |
fd361982 | 1378 | bfd_set_section_alignment (s, htab->plt.iplt_alignment); |
b44ee3a8 | 1379 | |
5e2ac45d L |
1380 | /* Allocate memory for the section contents. We use bfd_zalloc |
1381 | here in case unused entries are not reclaimed before the | |
1382 | section's contents are written out. This should not happen, | |
1383 | but this way if it does, we get a R_386_NONE or R_X86_64_NONE | |
1384 | reloc instead of garbage. */ | |
1385 | s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size); | |
1386 | if (s->contents == NULL) | |
1387 | return FALSE; | |
1388 | } | |
1389 | ||
1390 | if (htab->plt_eh_frame != NULL | |
1391 | && htab->plt_eh_frame->contents != NULL) | |
1392 | { | |
1393 | memcpy (htab->plt_eh_frame->contents, | |
1394 | htab->plt.eh_frame_plt, | |
1395 | htab->plt_eh_frame->size); | |
1396 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
1397 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
1398 | } | |
1399 | ||
1400 | if (htab->plt_got_eh_frame != NULL | |
1401 | && htab->plt_got_eh_frame->contents != NULL) | |
1402 | { | |
1403 | memcpy (htab->plt_got_eh_frame->contents, | |
1404 | htab->non_lazy_plt->eh_frame_plt, | |
1405 | htab->plt_got_eh_frame->size); | |
1406 | bfd_put_32 (dynobj, htab->plt_got->size, | |
1407 | (htab->plt_got_eh_frame->contents | |
1408 | + PLT_FDE_LEN_OFFSET)); | |
1409 | } | |
1410 | ||
1411 | if (htab->plt_second_eh_frame != NULL | |
1412 | && htab->plt_second_eh_frame->contents != NULL) | |
1413 | { | |
1414 | memcpy (htab->plt_second_eh_frame->contents, | |
1415 | htab->non_lazy_plt->eh_frame_plt, | |
1416 | htab->plt_second_eh_frame->size); | |
1417 | bfd_put_32 (dynobj, htab->plt_second->size, | |
1418 | (htab->plt_second_eh_frame->contents | |
1419 | + PLT_FDE_LEN_OFFSET)); | |
1420 | } | |
1421 | ||
1422 | if (htab->elf.dynamic_sections_created) | |
1423 | { | |
1424 | /* Add some entries to the .dynamic section. We fill in the | |
1425 | values later, in elf_{i386,x86_64}_finish_dynamic_sections, | |
1426 | but we must add the entries now so that we get the correct | |
1427 | size for the .dynamic section. The DT_DEBUG entry is filled | |
1428 | in by the dynamic linker and used by the debugger. */ | |
1429 | #define add_dynamic_entry(TAG, VAL) \ | |
1430 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
1431 | ||
1432 | if (bfd_link_executable (info)) | |
1433 | { | |
1434 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
1435 | return FALSE; | |
1436 | } | |
1437 | ||
1438 | if (htab->elf.splt->size != 0) | |
1439 | { | |
1440 | /* DT_PLTGOT is used by prelink even if there is no PLT | |
1441 | relocation. */ | |
1442 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
1443 | return FALSE; | |
1444 | } | |
1445 | ||
1446 | if (htab->elf.srelplt->size != 0) | |
1447 | { | |
1448 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
1449 | || !add_dynamic_entry (DT_PLTREL, htab->dt_reloc) | |
1450 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
1451 | return FALSE; | |
1452 | } | |
1453 | ||
1454 | if (htab->tlsdesc_plt | |
1455 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
1456 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
1457 | return FALSE; | |
1458 | ||
1459 | if (relocs) | |
1460 | { | |
1461 | if (!add_dynamic_entry (htab->dt_reloc, 0) | |
1462 | || !add_dynamic_entry (htab->dt_reloc_sz, 0) | |
1463 | || !add_dynamic_entry (htab->dt_reloc_ent, | |
1464 | htab->sizeof_reloc)) | |
1465 | return FALSE; | |
1466 | ||
1467 | /* If any dynamic relocs apply to a read-only section, | |
1468 | then we need a DT_TEXTREL entry. */ | |
1469 | if ((info->flags & DF_TEXTREL) == 0) | |
826c3f1e | 1470 | elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info); |
5e2ac45d L |
1471 | |
1472 | if ((info->flags & DF_TEXTREL) != 0) | |
1473 | { | |
1474 | if (htab->readonly_dynrelocs_against_ifunc) | |
1475 | { | |
1476 | info->callbacks->einfo | |
826c3f1e | 1477 | (_("%P%X: read-only segment has dynamic IFUNC relocations;" |
9a7f0679 L |
1478 | " recompile with %s\n"), |
1479 | bfd_link_dll (info) ? "-fPIC" : "-fPIE"); | |
5e2ac45d L |
1480 | bfd_set_error (bfd_error_bad_value); |
1481 | return FALSE; | |
1482 | } | |
1483 | ||
1484 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
1485 | return FALSE; | |
1486 | } | |
1487 | } | |
851b6fa1 | 1488 | if (htab->target_os == is_vxworks |
5e2ac45d L |
1489 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
1490 | return FALSE; | |
1491 | } | |
1492 | #undef add_dynamic_entry | |
1493 | ||
1494 | return TRUE; | |
1495 | } | |
1496 | ||
9577f60b L |
1497 | /* Finish up the x86 dynamic sections. */ |
1498 | ||
1499 | struct elf_x86_link_hash_table * | |
1500 | _bfd_x86_elf_finish_dynamic_sections (bfd *output_bfd, | |
1501 | struct bfd_link_info *info) | |
1502 | { | |
1503 | struct elf_x86_link_hash_table *htab; | |
1504 | const struct elf_backend_data *bed; | |
1505 | bfd *dynobj; | |
1506 | asection *sdyn; | |
1507 | bfd_byte *dyncon, *dynconend; | |
1508 | bfd_size_type sizeof_dyn; | |
1509 | ||
1510 | bed = get_elf_backend_data (output_bfd); | |
1511 | htab = elf_x86_hash_table (info, bed->target_id); | |
1512 | if (htab == NULL) | |
1513 | return htab; | |
1514 | ||
1515 | dynobj = htab->elf.dynobj; | |
1516 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); | |
1517 | ||
1518 | /* GOT is always created in setup_gnu_properties. But it may not be | |
1519 | needed. .got.plt section may be needed for static IFUNC. */ | |
1520 | if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0) | |
1521 | { | |
1522 | bfd_vma dynamic_addr; | |
1523 | ||
1524 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) | |
1525 | { | |
1526 | _bfd_error_handler | |
871b3ab2 | 1527 | (_("discarded output section: `%pA'"), htab->elf.sgotplt); |
9577f60b L |
1528 | return NULL; |
1529 | } | |
1530 | ||
1531 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize | |
1532 | = htab->got_entry_size; | |
1533 | ||
1534 | dynamic_addr = (sdyn == NULL | |
1535 | ? (bfd_vma) 0 | |
1536 | : sdyn->output_section->vma + sdyn->output_offset); | |
1537 | ||
1538 | /* Set the first entry in the global offset table to the address | |
07d6d2b8 | 1539 | of the dynamic section. Write GOT[1] and GOT[2], needed for |
9577f60b L |
1540 | the dynamic linker. */ |
1541 | if (htab->got_entry_size == 8) | |
1542 | { | |
1543 | bfd_put_64 (output_bfd, dynamic_addr, | |
1544 | htab->elf.sgotplt->contents); | |
1545 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
1546 | htab->elf.sgotplt->contents + 8); | |
1547 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
1548 | htab->elf.sgotplt->contents + 8*2); | |
1549 | } | |
1550 | else | |
1551 | { | |
1552 | bfd_put_32 (output_bfd, dynamic_addr, | |
1553 | htab->elf.sgotplt->contents); | |
1554 | bfd_put_32 (output_bfd, 0, | |
1555 | htab->elf.sgotplt->contents + 4); | |
1556 | bfd_put_32 (output_bfd, 0, | |
1557 | htab->elf.sgotplt->contents + 4*2); | |
1558 | } | |
1559 | } | |
1560 | ||
1561 | if (!htab->elf.dynamic_sections_created) | |
1562 | return htab; | |
1563 | ||
1564 | if (sdyn == NULL || htab->elf.sgot == NULL) | |
1565 | abort (); | |
1566 | ||
1567 | sizeof_dyn = bed->s->sizeof_dyn; | |
1568 | dyncon = sdyn->contents; | |
1569 | dynconend = sdyn->contents + sdyn->size; | |
1570 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
1571 | { | |
1572 | Elf_Internal_Dyn dyn; | |
1573 | asection *s; | |
1574 | ||
1575 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); | |
1576 | ||
1577 | switch (dyn.d_tag) | |
1578 | { | |
1579 | default: | |
851b6fa1 | 1580 | if (htab->target_os == is_vxworks |
9577f60b L |
1581 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) |
1582 | break; | |
1583 | continue; | |
1584 | ||
1585 | case DT_PLTGOT: | |
1586 | s = htab->elf.sgotplt; | |
1587 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
1588 | break; | |
1589 | ||
1590 | case DT_JMPREL: | |
1591 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; | |
1592 | break; | |
1593 | ||
1594 | case DT_PLTRELSZ: | |
1595 | s = htab->elf.srelplt->output_section; | |
1596 | dyn.d_un.d_val = s->size; | |
1597 | break; | |
1598 | ||
1599 | case DT_TLSDESC_PLT: | |
1600 | s = htab->elf.splt; | |
1601 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
1602 | + htab->tlsdesc_plt; | |
1603 | break; | |
1604 | ||
1605 | case DT_TLSDESC_GOT: | |
1606 | s = htab->elf.sgot; | |
1607 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
1608 | + htab->tlsdesc_got; | |
1609 | break; | |
1610 | } | |
1611 | ||
1612 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); | |
1613 | } | |
1614 | ||
1615 | if (htab->plt_got != NULL && htab->plt_got->size > 0) | |
1616 | elf_section_data (htab->plt_got->output_section) | |
1617 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; | |
1618 | ||
1619 | if (htab->plt_second != NULL && htab->plt_second->size > 0) | |
1620 | elf_section_data (htab->plt_second->output_section) | |
1621 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; | |
1622 | ||
1623 | /* Adjust .eh_frame for .plt section. */ | |
1624 | if (htab->plt_eh_frame != NULL | |
1625 | && htab->plt_eh_frame->contents != NULL) | |
1626 | { | |
1627 | if (htab->elf.splt != NULL | |
1628 | && htab->elf.splt->size != 0 | |
1629 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
1630 | && htab->elf.splt->output_section != NULL | |
1631 | && htab->plt_eh_frame->output_section != NULL) | |
1632 | { | |
1633 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
1634 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
1635 | + htab->plt_eh_frame->output_offset | |
1636 | + PLT_FDE_START_OFFSET; | |
1637 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
1638 | htab->plt_eh_frame->contents | |
1639 | + PLT_FDE_START_OFFSET); | |
1640 | } | |
1641 | ||
1642 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
1643 | { | |
1644 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
1645 | htab->plt_eh_frame, | |
1646 | htab->plt_eh_frame->contents)) | |
1647 | return NULL; | |
1648 | } | |
1649 | } | |
1650 | ||
1651 | /* Adjust .eh_frame for .plt.got section. */ | |
1652 | if (htab->plt_got_eh_frame != NULL | |
1653 | && htab->plt_got_eh_frame->contents != NULL) | |
1654 | { | |
1655 | if (htab->plt_got != NULL | |
1656 | && htab->plt_got->size != 0 | |
1657 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
1658 | && htab->plt_got->output_section != NULL | |
1659 | && htab->plt_got_eh_frame->output_section != NULL) | |
1660 | { | |
1661 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
1662 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
1663 | + htab->plt_got_eh_frame->output_offset | |
1664 | + PLT_FDE_START_OFFSET; | |
1665 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
1666 | htab->plt_got_eh_frame->contents | |
1667 | + PLT_FDE_START_OFFSET); | |
1668 | } | |
1669 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
1670 | { | |
1671 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
1672 | htab->plt_got_eh_frame, | |
1673 | htab->plt_got_eh_frame->contents)) | |
1674 | return NULL; | |
1675 | } | |
1676 | } | |
1677 | ||
1678 | /* Adjust .eh_frame for the second PLT section. */ | |
1679 | if (htab->plt_second_eh_frame != NULL | |
1680 | && htab->plt_second_eh_frame->contents != NULL) | |
1681 | { | |
1682 | if (htab->plt_second != NULL | |
1683 | && htab->plt_second->size != 0 | |
1684 | && (htab->plt_second->flags & SEC_EXCLUDE) == 0 | |
1685 | && htab->plt_second->output_section != NULL | |
1686 | && htab->plt_second_eh_frame->output_section != NULL) | |
1687 | { | |
1688 | bfd_vma plt_start = htab->plt_second->output_section->vma; | |
1689 | bfd_vma eh_frame_start | |
1690 | = (htab->plt_second_eh_frame->output_section->vma | |
1691 | + htab->plt_second_eh_frame->output_offset | |
1692 | + PLT_FDE_START_OFFSET); | |
1693 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
1694 | htab->plt_second_eh_frame->contents | |
1695 | + PLT_FDE_START_OFFSET); | |
1696 | } | |
1697 | if (htab->plt_second_eh_frame->sec_info_type | |
1698 | == SEC_INFO_TYPE_EH_FRAME) | |
1699 | { | |
1700 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
1701 | htab->plt_second_eh_frame, | |
1702 | htab->plt_second_eh_frame->contents)) | |
1703 | return NULL; | |
1704 | } | |
1705 | } | |
1706 | ||
1707 | if (htab->elf.sgot && htab->elf.sgot->size > 0) | |
1708 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
1709 | = htab->got_entry_size; | |
1710 | ||
1711 | return htab; | |
1712 | } | |
1713 | ||
1714 | ||
0afcef53 L |
1715 | bfd_boolean |
1716 | _bfd_x86_elf_always_size_sections (bfd *output_bfd, | |
1717 | struct bfd_link_info *info) | |
1718 | { | |
1719 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
1720 | ||
1721 | if (tls_sec) | |
1722 | { | |
1723 | struct elf_link_hash_entry *tlsbase; | |
1724 | ||
1725 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
1726 | "_TLS_MODULE_BASE_", | |
1727 | FALSE, FALSE, FALSE); | |
1728 | ||
1729 | if (tlsbase && tlsbase->type == STT_TLS) | |
1730 | { | |
1731 | struct elf_x86_link_hash_table *htab; | |
1732 | struct bfd_link_hash_entry *bh = NULL; | |
1733 | const struct elf_backend_data *bed | |
1734 | = get_elf_backend_data (output_bfd); | |
1735 | ||
1736 | htab = elf_x86_hash_table (info, bed->target_id); | |
1737 | if (htab == NULL) | |
1738 | return FALSE; | |
1739 | ||
1740 | if (!(_bfd_generic_link_add_one_symbol | |
1741 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
1742 | tls_sec, 0, NULL, FALSE, | |
1743 | bed->collect, &bh))) | |
1744 | return FALSE; | |
1745 | ||
1746 | htab->tls_module_base = bh; | |
1747 | ||
1748 | tlsbase = (struct elf_link_hash_entry *)bh; | |
1749 | tlsbase->def_regular = 1; | |
1750 | tlsbase->other = STV_HIDDEN; | |
1751 | tlsbase->root.linker_def = 1; | |
1752 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
1753 | } | |
1754 | } | |
1755 | ||
1756 | return TRUE; | |
1757 | } | |
1758 | ||
1759 | void | |
1760 | _bfd_x86_elf_merge_symbol_attribute (struct elf_link_hash_entry *h, | |
1761 | const Elf_Internal_Sym *isym, | |
1762 | bfd_boolean definition, | |
1763 | bfd_boolean dynamic ATTRIBUTE_UNUSED) | |
1764 | { | |
1765 | if (definition) | |
1766 | { | |
1767 | struct elf_x86_link_hash_entry *eh | |
1768 | = (struct elf_x86_link_hash_entry *) h; | |
1769 | eh->def_protected = (ELF_ST_VISIBILITY (isym->st_other) | |
1770 | == STV_PROTECTED); | |
1771 | } | |
1772 | } | |
1773 | ||
1774 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
1775 | ||
1776 | void | |
1777 | _bfd_x86_elf_copy_indirect_symbol (struct bfd_link_info *info, | |
1778 | struct elf_link_hash_entry *dir, | |
1779 | struct elf_link_hash_entry *ind) | |
1780 | { | |
1781 | struct elf_x86_link_hash_entry *edir, *eind; | |
1782 | ||
1783 | edir = (struct elf_x86_link_hash_entry *) dir; | |
1784 | eind = (struct elf_x86_link_hash_entry *) ind; | |
1785 | ||
1786 | if (eind->dyn_relocs != NULL) | |
1787 | { | |
1788 | if (edir->dyn_relocs != NULL) | |
1789 | { | |
1790 | struct elf_dyn_relocs **pp; | |
1791 | struct elf_dyn_relocs *p; | |
1792 | ||
1793 | /* Add reloc counts against the indirect sym to the direct sym | |
1794 | list. Merge any entries against the same section. */ | |
1795 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1796 | { | |
1797 | struct elf_dyn_relocs *q; | |
1798 | ||
1799 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1800 | if (q->sec == p->sec) | |
1801 | { | |
1802 | q->pc_count += p->pc_count; | |
1803 | q->count += p->count; | |
1804 | *pp = p->next; | |
1805 | break; | |
1806 | } | |
1807 | if (q == NULL) | |
1808 | pp = &p->next; | |
1809 | } | |
1810 | *pp = edir->dyn_relocs; | |
1811 | } | |
1812 | ||
1813 | edir->dyn_relocs = eind->dyn_relocs; | |
1814 | eind->dyn_relocs = NULL; | |
1815 | } | |
1816 | ||
1817 | if (ind->root.type == bfd_link_hash_indirect | |
1818 | && dir->got.refcount <= 0) | |
1819 | { | |
1820 | edir->tls_type = eind->tls_type; | |
1821 | eind->tls_type = GOT_UNKNOWN; | |
1822 | } | |
1823 | ||
1824 | /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will | |
1825 | generate a R_386_COPY reloc. */ | |
1826 | edir->gotoff_ref |= eind->gotoff_ref; | |
1827 | ||
98b273dc | 1828 | edir->zero_undefweak |= eind->zero_undefweak; |
0afcef53 L |
1829 | |
1830 | if (ELIMINATE_COPY_RELOCS | |
1831 | && ind->root.type != bfd_link_hash_indirect | |
1832 | && dir->dynamic_adjusted) | |
1833 | { | |
1834 | /* If called to transfer flags for a weakdef during processing | |
1835 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1836 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1837 | if (dir->versioned != versioned_hidden) | |
1838 | dir->ref_dynamic |= ind->ref_dynamic; | |
1839 | dir->ref_regular |= ind->ref_regular; | |
1840 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1841 | dir->needs_plt |= ind->needs_plt; | |
1842 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1843 | } | |
1844 | else | |
79b0c981 | 1845 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
0afcef53 L |
1846 | } |
1847 | ||
1848 | /* Remove undefined weak symbol from the dynamic symbol table if it | |
1849 | is resolved to 0. */ | |
1850 | ||
1851 | bfd_boolean | |
1852 | _bfd_x86_elf_fixup_symbol (struct bfd_link_info *info, | |
1853 | struct elf_link_hash_entry *h) | |
1854 | { | |
c5bce5c6 L |
1855 | if (h->dynindx != -1 |
1856 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, elf_x86_hash_entry (h))) | |
0afcef53 | 1857 | { |
c5bce5c6 L |
1858 | h->dynindx = -1; |
1859 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
1860 | h->dynstr_index); | |
0afcef53 L |
1861 | } |
1862 | return TRUE; | |
1863 | } | |
1864 | ||
4ec09950 L |
1865 | /* Change the STT_GNU_IFUNC symbol defined in position-dependent |
1866 | executable into the normal function symbol and set its address | |
1867 | to its PLT entry, which should be resolved by R_*_IRELATIVE at | |
1868 | run-time. */ | |
1869 | ||
1870 | void | |
1871 | _bfd_x86_elf_link_fixup_ifunc_symbol (struct bfd_link_info *info, | |
1872 | struct elf_x86_link_hash_table *htab, | |
1873 | struct elf_link_hash_entry *h, | |
1874 | Elf_Internal_Sym *sym) | |
1875 | { | |
1876 | if (bfd_link_pde (info) | |
1877 | && h->def_regular | |
1878 | && h->dynindx != -1 | |
1879 | && h->plt.offset != (bfd_vma) -1 | |
1880 | && h->type == STT_GNU_IFUNC | |
1881 | && h->pointer_equality_needed) | |
1882 | { | |
1883 | asection *plt_s; | |
1884 | bfd_vma plt_offset; | |
1885 | bfd *output_bfd = info->output_bfd; | |
1886 | ||
1887 | if (htab->plt_second) | |
1888 | { | |
1889 | struct elf_x86_link_hash_entry *eh | |
1890 | = (struct elf_x86_link_hash_entry *) h; | |
1891 | ||
1892 | plt_s = htab->plt_second; | |
1893 | plt_offset = eh->plt_second.offset; | |
1894 | } | |
1895 | else | |
1896 | { | |
1897 | plt_s = htab->elf.splt; | |
1898 | plt_offset = h->plt.offset; | |
1899 | } | |
1900 | ||
1901 | sym->st_size = 0; | |
1902 | sym->st_info = ELF_ST_INFO (ELF_ST_BIND (sym->st_info), STT_FUNC); | |
1903 | sym->st_shndx | |
1904 | = _bfd_elf_section_from_bfd_section (output_bfd, | |
1905 | plt_s->output_section); | |
1906 | sym->st_value = (plt_s->output_section->vma | |
1907 | + plt_s->output_offset + plt_offset); | |
1908 | } | |
1909 | } | |
1910 | ||
0afcef53 L |
1911 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
1912 | ||
1913 | bfd_boolean | |
1914 | _bfd_x86_elf_hash_symbol (struct elf_link_hash_entry *h) | |
1915 | { | |
1916 | if (h->plt.offset != (bfd_vma) -1 | |
1917 | && !h->def_regular | |
1918 | && !h->pointer_equality_needed) | |
1919 | return FALSE; | |
1920 | ||
1921 | return _bfd_elf_hash_symbol (h); | |
1922 | } | |
1923 | ||
eeb2f20a L |
1924 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1925 | regular object. The current definition is in some section of the | |
1926 | dynamic object, but we're not including those sections. We have to | |
1927 | change the definition to something the rest of the link can | |
1928 | understand. */ | |
1929 | ||
1930 | bfd_boolean | |
1931 | _bfd_x86_elf_adjust_dynamic_symbol (struct bfd_link_info *info, | |
1932 | struct elf_link_hash_entry *h) | |
1933 | { | |
1934 | struct elf_x86_link_hash_table *htab; | |
1935 | asection *s, *srel; | |
1936 | struct elf_x86_link_hash_entry *eh; | |
1937 | struct elf_dyn_relocs *p; | |
1938 | const struct elf_backend_data *bed | |
1939 | = get_elf_backend_data (info->output_bfd); | |
1940 | ||
1941 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
1942 | if (h->type == STT_GNU_IFUNC) | |
1943 | { | |
1944 | /* All local STT_GNU_IFUNC references must be treate as local | |
1945 | calls via local PLT. */ | |
1946 | if (h->ref_regular | |
1947 | && SYMBOL_CALLS_LOCAL (info, h)) | |
1948 | { | |
1949 | bfd_size_type pc_count = 0, count = 0; | |
1950 | struct elf_dyn_relocs **pp; | |
1951 | ||
1952 | eh = (struct elf_x86_link_hash_entry *) h; | |
1953 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1954 | { | |
1955 | pc_count += p->pc_count; | |
1956 | p->count -= p->pc_count; | |
1957 | p->pc_count = 0; | |
1958 | count += p->count; | |
1959 | if (p->count == 0) | |
1960 | *pp = p->next; | |
1961 | else | |
1962 | pp = &p->next; | |
1963 | } | |
1964 | ||
1965 | if (pc_count || count) | |
1966 | { | |
1967 | h->non_got_ref = 1; | |
1968 | if (pc_count) | |
1969 | { | |
1970 | /* Increment PLT reference count only for PC-relative | |
1971 | references. */ | |
1972 | h->needs_plt = 1; | |
1973 | if (h->plt.refcount <= 0) | |
1974 | h->plt.refcount = 1; | |
1975 | else | |
1976 | h->plt.refcount += 1; | |
1977 | } | |
1978 | } | |
1979 | } | |
1980 | ||
1981 | if (h->plt.refcount <= 0) | |
1982 | { | |
1983 | h->plt.offset = (bfd_vma) -1; | |
1984 | h->needs_plt = 0; | |
1985 | } | |
1986 | return TRUE; | |
1987 | } | |
1988 | ||
1989 | /* If this is a function, put it in the procedure linkage table. We | |
1990 | will fill in the contents of the procedure linkage table later, | |
1991 | when we know the address of the .got section. */ | |
1992 | if (h->type == STT_FUNC | |
1993 | || h->needs_plt) | |
1994 | { | |
1995 | if (h->plt.refcount <= 0 | |
1996 | || SYMBOL_CALLS_LOCAL (info, h) | |
1997 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1998 | && h->root.type == bfd_link_hash_undefweak)) | |
1999 | { | |
2000 | /* This case can occur if we saw a PLT32 reloc in an input | |
2001 | file, but the symbol was never referred to by a dynamic | |
2002 | object, or if all references were garbage collected. In | |
2003 | such a case, we don't actually need to build a procedure | |
2004 | linkage table, and we can just do a PC32 reloc instead. */ | |
2005 | h->plt.offset = (bfd_vma) -1; | |
2006 | h->needs_plt = 0; | |
2007 | } | |
2008 | ||
2009 | return TRUE; | |
2010 | } | |
2011 | else | |
2012 | /* It's possible that we incorrectly decided a .plt reloc was needed | |
2013 | * for an R_386_PC32/R_X86_64_PC32 reloc to a non-function sym in | |
2014 | check_relocs. We can't decide accurately between function and | |
2015 | non-function syms in check-relocs; Objects loaded later in | |
2016 | the link may change h->type. So fix it now. */ | |
2017 | h->plt.offset = (bfd_vma) -1; | |
2018 | ||
2019 | eh = (struct elf_x86_link_hash_entry *) h; | |
2020 | ||
2021 | /* If this is a weak symbol, and there is a real definition, the | |
2022 | processor independent code will have arranged for us to see the | |
2023 | real definition first, and we can just use the same value. */ | |
60d67dc8 | 2024 | if (h->is_weakalias) |
eeb2f20a | 2025 | { |
60d67dc8 AM |
2026 | struct elf_link_hash_entry *def = weakdef (h); |
2027 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
2028 | h->root.u.def.section = def->root.u.def.section; | |
2029 | h->root.u.def.value = def->root.u.def.value; | |
eeb2f20a L |
2030 | if (ELIMINATE_COPY_RELOCS |
2031 | || info->nocopyreloc | |
2032 | || SYMBOL_NO_COPYRELOC (info, eh)) | |
2033 | { | |
2034 | /* NB: needs_copy is always 0 for i386. */ | |
60d67dc8 AM |
2035 | h->non_got_ref = def->non_got_ref; |
2036 | eh->needs_copy = def->needs_copy; | |
eeb2f20a L |
2037 | } |
2038 | return TRUE; | |
2039 | } | |
2040 | ||
2041 | /* This is a reference to a symbol defined by a dynamic object which | |
2042 | is not a function. */ | |
2043 | ||
2044 | /* If we are creating a shared library, we must presume that the | |
2045 | only references to the symbol are via the global offset table. | |
2046 | For such cases we need not do anything here; the relocations will | |
2047 | be handled correctly by relocate_section. */ | |
2048 | if (!bfd_link_executable (info)) | |
2049 | return TRUE; | |
2050 | ||
2051 | /* If there are no references to this symbol that do not use the | |
2052 | GOT nor R_386_GOTOFF relocation, we don't need to generate a copy | |
2053 | reloc. NB: gotoff_ref is always 0 for x86-64. */ | |
2054 | if (!h->non_got_ref && !eh->gotoff_ref) | |
2055 | return TRUE; | |
2056 | ||
2057 | /* If -z nocopyreloc was given, we won't generate them either. */ | |
2058 | if (info->nocopyreloc || SYMBOL_NO_COPYRELOC (info, eh)) | |
2059 | { | |
2060 | h->non_got_ref = 0; | |
2061 | return TRUE; | |
2062 | } | |
2063 | ||
2064 | htab = elf_x86_hash_table (info, bed->target_id); | |
2065 | if (htab == NULL) | |
2066 | return FALSE; | |
2067 | ||
2068 | /* If there aren't any dynamic relocs in read-only sections nor | |
2069 | R_386_GOTOFF relocation, then we can keep the dynamic relocs and | |
2070 | avoid the copy reloc. This doesn't work on VxWorks, where we can | |
2071 | not have dynamic relocations (other than copy and jump slot | |
2072 | relocations) in an executable. */ | |
2073 | if (ELIMINATE_COPY_RELOCS | |
2074 | && (bed->target_id == X86_64_ELF_DATA | |
2075 | || (!eh->gotoff_ref | |
851b6fa1 | 2076 | && htab->target_os != is_vxworks))) |
eeb2f20a | 2077 | { |
826c3f1e | 2078 | /* If we don't find any dynamic relocs in read-only sections, |
eeb2f20a L |
2079 | then we'll be keeping the dynamic relocs and avoiding the copy |
2080 | reloc. */ | |
826c3f1e | 2081 | if (!readonly_dynrelocs (h)) |
eeb2f20a L |
2082 | { |
2083 | h->non_got_ref = 0; | |
2084 | return TRUE; | |
2085 | } | |
2086 | } | |
2087 | ||
2088 | /* We must allocate the symbol in our .dynbss section, which will | |
2089 | become part of the .bss section of the executable. There will be | |
2090 | an entry for this symbol in the .dynsym section. The dynamic | |
2091 | object will contain position independent code, so all references | |
2092 | from the dynamic object to this symbol will go through the global | |
2093 | offset table. The dynamic linker will use the .dynsym entry to | |
2094 | determine the address it must put in the global offset table, so | |
2095 | both the dynamic object and the regular object will refer to the | |
2096 | same memory location for the variable. */ | |
2097 | ||
2098 | /* We must generate a R_386_COPY/R_X86_64_COPY reloc to tell the | |
2099 | dynamic linker to copy the initial value out of the dynamic object | |
2100 | and into the runtime process image. */ | |
2101 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) | |
2102 | { | |
2103 | s = htab->elf.sdynrelro; | |
2104 | srel = htab->elf.sreldynrelro; | |
2105 | } | |
2106 | else | |
2107 | { | |
2108 | s = htab->elf.sdynbss; | |
2109 | srel = htab->elf.srelbss; | |
2110 | } | |
2111 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) | |
2112 | { | |
503294e7 | 2113 | srel->size += htab->sizeof_reloc; |
eeb2f20a L |
2114 | h->needs_copy = 1; |
2115 | } | |
2116 | ||
2117 | return _bfd_elf_adjust_dynamic_copy (info, h, s); | |
2118 | } | |
2119 | ||
9f857535 L |
2120 | void |
2121 | _bfd_x86_elf_hide_symbol (struct bfd_link_info *info, | |
2122 | struct elf_link_hash_entry *h, | |
2123 | bfd_boolean force_local) | |
2124 | { | |
2125 | if (h->root.type == bfd_link_hash_undefweak | |
2126 | && info->nointerp | |
2127 | && bfd_link_pie (info)) | |
2128 | { | |
2129 | /* When there is no dynamic interpreter in PIE, make the undefined | |
2130 | weak symbol dynamic so that PC relative branch to the undefined | |
2131 | weak symbol will land to address 0. */ | |
2132 | struct elf_x86_link_hash_entry *eh = elf_x86_hash_entry (h); | |
79b0c981 | 2133 | if (h->plt.refcount > 0 |
9f857535 L |
2134 | || eh->plt_got.refcount > 0) |
2135 | return; | |
2136 | } | |
2137 | ||
2138 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); | |
2139 | } | |
2140 | ||
6999821f L |
2141 | /* Return TRUE if a symbol is referenced locally. It is similar to |
2142 | SYMBOL_REFERENCES_LOCAL, but it also checks version script. It | |
2143 | works in check_relocs. */ | |
2144 | ||
2145 | bfd_boolean | |
2146 | _bfd_x86_elf_link_symbol_references_local (struct bfd_link_info *info, | |
2147 | struct elf_link_hash_entry *h) | |
2148 | { | |
0a27fed7 L |
2149 | struct elf_x86_link_hash_entry *eh = elf_x86_hash_entry (h); |
2150 | struct elf_x86_link_hash_table *htab | |
2151 | = (struct elf_x86_link_hash_table *) info->hash; | |
6999821f L |
2152 | |
2153 | if (eh->local_ref > 1) | |
2154 | return TRUE; | |
2155 | ||
2156 | if (eh->local_ref == 1) | |
2157 | return FALSE; | |
2158 | ||
2159 | /* Unversioned symbols defined in regular objects can be forced local | |
0a27fed7 L |
2160 | by linker version script. A weak undefined symbol is forced local |
2161 | if | |
2162 | 1. It has non-default visibility. Or | |
8fbf0ba1 | 2163 | 2. When building executable, there is no dynamic linker. Or |
0a27fed7 L |
2164 | 3. or "-z nodynamic-undefined-weak" is used. |
2165 | */ | |
6999821f | 2166 | if (SYMBOL_REFERENCES_LOCAL (info, h) |
0a27fed7 L |
2167 | || (h->root.type == bfd_link_hash_undefweak |
2168 | && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2169 | || (bfd_link_executable (info) | |
8fbf0ba1 | 2170 | && htab->interp == NULL) |
0a27fed7 | 2171 | || info->dynamic_undefined_weak == 0)) |
6999821f | 2172 | || ((h->def_regular || ELF_COMMON_DEF_P (h)) |
6999821f | 2173 | && info->version_info != NULL |
099bb8fb | 2174 | && _bfd_elf_link_hide_sym_by_version (info, h))) |
6999821f L |
2175 | { |
2176 | eh->local_ref = 2; | |
2177 | return TRUE; | |
2178 | } | |
2179 | ||
099bb8fb | 2180 | eh->local_ref = 1; |
6999821f L |
2181 | return FALSE; |
2182 | } | |
2183 | ||
4f501a24 L |
2184 | /* Return the section that should be marked against GC for a given |
2185 | relocation. */ | |
2186 | ||
2187 | asection * | |
2188 | _bfd_x86_elf_gc_mark_hook (asection *sec, | |
2189 | struct bfd_link_info *info, | |
2190 | Elf_Internal_Rela *rel, | |
2191 | struct elf_link_hash_entry *h, | |
2192 | Elf_Internal_Sym *sym) | |
2193 | { | |
2194 | /* Compiler should optimize this out. */ | |
2195 | if (((unsigned int) R_X86_64_GNU_VTINHERIT | |
2196 | != (unsigned int) R_386_GNU_VTINHERIT) | |
2197 | || ((unsigned int) R_X86_64_GNU_VTENTRY | |
2198 | != (unsigned int) R_386_GNU_VTENTRY)) | |
2199 | abort (); | |
2200 | ||
2201 | if (h != NULL) | |
2202 | switch (ELF32_R_TYPE (rel->r_info)) | |
2203 | { | |
2204 | case R_X86_64_GNU_VTINHERIT: | |
2205 | case R_X86_64_GNU_VTENTRY: | |
2206 | return NULL; | |
2207 | } | |
2208 | ||
2209 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
2210 | } | |
2211 | ||
f493882d L |
2212 | static bfd_vma |
2213 | elf_i386_get_plt_got_vma (struct elf_x86_plt *plt_p ATTRIBUTE_UNUSED, | |
2214 | bfd_vma off, | |
2215 | bfd_vma offset ATTRIBUTE_UNUSED, | |
2216 | bfd_vma got_addr) | |
2217 | { | |
2218 | return got_addr + off; | |
2219 | } | |
2220 | ||
2221 | static bfd_vma | |
2222 | elf_x86_64_get_plt_got_vma (struct elf_x86_plt *plt_p, | |
2223 | bfd_vma off, | |
2224 | bfd_vma offset, | |
2225 | bfd_vma got_addr ATTRIBUTE_UNUSED) | |
2226 | { | |
2227 | return plt_p->sec->vma + offset + off + plt_p->plt_got_insn_size; | |
2228 | } | |
2229 | ||
2230 | static bfd_boolean | |
2231 | elf_i386_valid_plt_reloc_p (unsigned int type) | |
2232 | { | |
2233 | return (type == R_386_JUMP_SLOT | |
2234 | || type == R_386_GLOB_DAT | |
2235 | || type == R_386_IRELATIVE); | |
2236 | } | |
2237 | ||
2238 | static bfd_boolean | |
2239 | elf_x86_64_valid_plt_reloc_p (unsigned int type) | |
2240 | { | |
2241 | return (type == R_X86_64_JUMP_SLOT | |
2242 | || type == R_X86_64_GLOB_DAT | |
2243 | || type == R_X86_64_IRELATIVE); | |
2244 | } | |
2245 | ||
2246 | long | |
2247 | _bfd_x86_elf_get_synthetic_symtab (bfd *abfd, | |
2248 | long count, | |
2249 | long relsize, | |
2250 | bfd_vma got_addr, | |
2251 | struct elf_x86_plt plts[], | |
2252 | asymbol **dynsyms, | |
2253 | asymbol **ret) | |
2254 | { | |
2255 | long size, i, n, len; | |
2256 | int j; | |
2257 | unsigned int plt_got_offset, plt_entry_size; | |
2258 | asymbol *s; | |
2259 | bfd_byte *plt_contents; | |
2260 | long dynrelcount; | |
2261 | arelent **dynrelbuf, *p; | |
2262 | char *names; | |
2263 | const struct elf_backend_data *bed; | |
2264 | bfd_vma (*get_plt_got_vma) (struct elf_x86_plt *, bfd_vma, bfd_vma, | |
2265 | bfd_vma); | |
2266 | bfd_boolean (*valid_plt_reloc_p) (unsigned int); | |
2267 | ||
2600d80c | 2268 | dynrelbuf = NULL; |
f493882d | 2269 | if (count == 0) |
2600d80c | 2270 | goto bad_return; |
f493882d L |
2271 | |
2272 | dynrelbuf = (arelent **) bfd_malloc (relsize); | |
2273 | if (dynrelbuf == NULL) | |
2600d80c | 2274 | goto bad_return; |
f493882d L |
2275 | |
2276 | dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf, | |
2277 | dynsyms); | |
b69e9267 | 2278 | if (dynrelcount <= 0) |
2600d80c | 2279 | goto bad_return; |
f493882d L |
2280 | |
2281 | /* Sort the relocs by address. */ | |
2282 | qsort (dynrelbuf, dynrelcount, sizeof (arelent *), | |
2283 | _bfd_x86_elf_compare_relocs); | |
2284 | ||
2285 | size = count * sizeof (asymbol); | |
2286 | ||
2287 | /* Allocate space for @plt suffixes. */ | |
2288 | n = 0; | |
2289 | for (i = 0; i < dynrelcount; i++) | |
2290 | { | |
2291 | p = dynrelbuf[i]; | |
2292 | size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); | |
2293 | if (p->addend != 0) | |
2294 | size += sizeof ("+0x") - 1 + 8 + 8 * ABI_64_P (abfd); | |
2295 | } | |
2296 | ||
2297 | s = *ret = (asymbol *) bfd_zmalloc (size); | |
2298 | if (s == NULL) | |
2299 | goto bad_return; | |
2300 | ||
2301 | bed = get_elf_backend_data (abfd); | |
2302 | ||
2303 | if (bed->target_id == X86_64_ELF_DATA) | |
2304 | { | |
2305 | get_plt_got_vma = elf_x86_64_get_plt_got_vma; | |
2306 | valid_plt_reloc_p = elf_x86_64_valid_plt_reloc_p; | |
2307 | } | |
2308 | else | |
2309 | { | |
2310 | get_plt_got_vma = elf_i386_get_plt_got_vma; | |
2311 | valid_plt_reloc_p = elf_i386_valid_plt_reloc_p; | |
2312 | if (got_addr) | |
2313 | { | |
2314 | /* Check .got.plt and then .got to get the _GLOBAL_OFFSET_TABLE_ | |
2315 | address. */ | |
2316 | asection *sec = bfd_get_section_by_name (abfd, ".got.plt"); | |
2317 | if (sec != NULL) | |
2318 | got_addr = sec->vma; | |
2319 | else | |
2320 | { | |
2321 | sec = bfd_get_section_by_name (abfd, ".got"); | |
2322 | if (sec != NULL) | |
2323 | got_addr = sec->vma; | |
2324 | } | |
2325 | ||
2326 | if (got_addr == (bfd_vma) -1) | |
2327 | goto bad_return; | |
2328 | } | |
2329 | } | |
2330 | ||
2331 | /* Check for each PLT section. */ | |
2332 | names = (char *) (s + count); | |
2333 | size = 0; | |
2334 | n = 0; | |
2335 | for (j = 0; plts[j].name != NULL; j++) | |
2336 | if ((plt_contents = plts[j].contents) != NULL) | |
2337 | { | |
2338 | long k; | |
2339 | bfd_vma offset; | |
2340 | asection *plt; | |
2341 | struct elf_x86_plt *plt_p = &plts[j]; | |
2342 | ||
2343 | plt_got_offset = plt_p->plt_got_offset; | |
2344 | plt_entry_size = plt_p->plt_entry_size; | |
2345 | ||
2346 | plt = plt_p->sec; | |
2347 | ||
2348 | if ((plt_p->type & plt_lazy)) | |
2349 | { | |
2350 | /* Skip PLT0 in lazy PLT. */ | |
2351 | k = 1; | |
2352 | offset = plt_entry_size; | |
2353 | } | |
2354 | else | |
2355 | { | |
2356 | k = 0; | |
2357 | offset = 0; | |
2358 | } | |
2359 | ||
2360 | /* Check each PLT entry against dynamic relocations. */ | |
2361 | for (; k < plt_p->count; k++) | |
2362 | { | |
2363 | int off; | |
2364 | bfd_vma got_vma; | |
2365 | long min, max, mid; | |
2366 | ||
2367 | /* Get the GOT offset for i386 or the PC-relative offset | |
2368 | for x86-64, a signed 32-bit integer. */ | |
2369 | off = H_GET_32 (abfd, (plt_contents + offset | |
2370 | + plt_got_offset)); | |
2371 | got_vma = get_plt_got_vma (plt_p, off, offset, got_addr); | |
2372 | ||
2373 | /* Binary search. */ | |
2374 | p = dynrelbuf[0]; | |
2375 | min = 0; | |
2376 | max = dynrelcount; | |
2377 | while ((min + 1) < max) | |
2378 | { | |
2379 | arelent *r; | |
2380 | ||
2381 | mid = (min + max) / 2; | |
2382 | r = dynrelbuf[mid]; | |
2383 | if (got_vma > r->address) | |
2384 | min = mid; | |
2385 | else if (got_vma < r->address) | |
2386 | max = mid; | |
2387 | else | |
2388 | { | |
2389 | p = r; | |
2390 | break; | |
2391 | } | |
2392 | } | |
2393 | ||
2394 | /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */ | |
2395 | if (got_vma == p->address | |
2396 | && p->howto != NULL | |
2397 | && valid_plt_reloc_p (p->howto->type)) | |
2398 | { | |
2399 | *s = **p->sym_ptr_ptr; | |
2400 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL | |
2401 | set. Since we are defining a symbol, ensure one | |
2402 | of them is set. */ | |
2403 | if ((s->flags & BSF_LOCAL) == 0) | |
2404 | s->flags |= BSF_GLOBAL; | |
2405 | s->flags |= BSF_SYNTHETIC; | |
2406 | /* This is no longer a section symbol. */ | |
2407 | s->flags &= ~BSF_SECTION_SYM; | |
2408 | s->section = plt; | |
2409 | s->the_bfd = plt->owner; | |
2410 | s->value = offset; | |
2411 | s->udata.p = NULL; | |
2412 | s->name = names; | |
2413 | len = strlen ((*p->sym_ptr_ptr)->name); | |
2414 | memcpy (names, (*p->sym_ptr_ptr)->name, len); | |
2415 | names += len; | |
2416 | if (p->addend != 0) | |
2417 | { | |
2418 | char buf[30], *a; | |
2419 | ||
2420 | memcpy (names, "+0x", sizeof ("+0x") - 1); | |
2421 | names += sizeof ("+0x") - 1; | |
2422 | bfd_sprintf_vma (abfd, buf, p->addend); | |
2423 | for (a = buf; *a == '0'; ++a) | |
2424 | ; | |
2425 | size = strlen (a); | |
2426 | memcpy (names, a, size); | |
2427 | names += size; | |
2428 | } | |
2429 | memcpy (names, "@plt", sizeof ("@plt")); | |
2430 | names += sizeof ("@plt"); | |
2431 | n++; | |
2432 | s++; | |
61e3bf5f L |
2433 | /* There should be only one entry in PLT for a given |
2434 | symbol. Set howto to NULL after processing a PLT | |
2435 | entry to guard against corrupted PLT. */ | |
2436 | p->howto = NULL; | |
f493882d L |
2437 | } |
2438 | offset += plt_entry_size; | |
2439 | } | |
2440 | } | |
2441 | ||
2442 | /* PLT entries with R_386_TLS_DESC relocations are skipped. */ | |
2443 | if (n == 0) | |
2444 | { | |
dc1e8a47 | 2445 | bad_return: |
f493882d L |
2446 | count = -1; |
2447 | } | |
2448 | else | |
2449 | count = n; | |
2450 | ||
2451 | for (j = 0; plts[j].name != NULL; j++) | |
c9594989 | 2452 | free (plts[j].contents); |
f493882d L |
2453 | |
2454 | free (dynrelbuf); | |
2455 | ||
2456 | return count; | |
2457 | } | |
2458 | ||
0afcef53 L |
2459 | /* Parse x86 GNU properties. */ |
2460 | ||
2461 | enum elf_property_kind | |
2462 | _bfd_x86_elf_parse_gnu_properties (bfd *abfd, unsigned int type, | |
2463 | bfd_byte *ptr, unsigned int datasz) | |
2464 | { | |
2465 | elf_property *prop; | |
2466 | ||
a9eafb08 L |
2467 | if (type == GNU_PROPERTY_X86_COMPAT_ISA_1_USED |
2468 | || type == GNU_PROPERTY_X86_COMPAT_ISA_1_NEEDED | |
2469 | || (type >= GNU_PROPERTY_X86_UINT32_AND_LO | |
2470 | && type <= GNU_PROPERTY_X86_UINT32_AND_HI) | |
2471 | || (type >= GNU_PROPERTY_X86_UINT32_OR_LO | |
2472 | && type <= GNU_PROPERTY_X86_UINT32_OR_HI) | |
2473 | || (type >= GNU_PROPERTY_X86_UINT32_OR_AND_LO | |
2474 | && type <= GNU_PROPERTY_X86_UINT32_OR_AND_HI)) | |
0afcef53 | 2475 | { |
0afcef53 L |
2476 | if (datasz != 4) |
2477 | { | |
2478 | _bfd_error_handler | |
a9eafb08 L |
2479 | (_("error: %pB: <corrupt x86 property (0x%x) size: 0x%x>"), |
2480 | abfd, type, datasz); | |
0afcef53 L |
2481 | return property_corrupt; |
2482 | } | |
2483 | prop = _bfd_elf_get_property (abfd, type, datasz); | |
90c745dc | 2484 | prop->u.number |= bfd_h_get_32 (abfd, ptr); |
0afcef53 | 2485 | prop->pr_kind = property_number; |
a9eafb08 | 2486 | return property_number; |
0afcef53 L |
2487 | } |
2488 | ||
a9eafb08 | 2489 | return property_ignored; |
0afcef53 L |
2490 | } |
2491 | ||
2492 | /* Merge x86 GNU property BPROP with APROP. If APROP isn't NULL, | |
2493 | return TRUE if APROP is updated. Otherwise, return TRUE if BPROP | |
2494 | should be merged with ABFD. */ | |
2495 | ||
2496 | bfd_boolean | |
2497 | _bfd_x86_elf_merge_gnu_properties (struct bfd_link_info *info, | |
2498 | bfd *abfd ATTRIBUTE_UNUSED, | |
4e539114 | 2499 | bfd *bbfd ATTRIBUTE_UNUSED, |
0afcef53 L |
2500 | elf_property *aprop, |
2501 | elf_property *bprop) | |
2502 | { | |
2503 | unsigned int number, features; | |
2504 | bfd_boolean updated = FALSE; | |
2505 | unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type; | |
2506 | ||
a9eafb08 L |
2507 | if (pr_type == GNU_PROPERTY_X86_COMPAT_ISA_1_USED |
2508 | || (pr_type >= GNU_PROPERTY_X86_UINT32_OR_AND_LO | |
2509 | && pr_type <= GNU_PROPERTY_X86_UINT32_OR_AND_HI)) | |
0afcef53 | 2510 | { |
f7309df2 L |
2511 | if (aprop == NULL || bprop == NULL) |
2512 | { | |
2513 | /* Only one of APROP and BPROP can be NULL. */ | |
2514 | if (aprop != NULL) | |
2515 | { | |
2516 | /* Remove this property since the other input file doesn't | |
2517 | have it. */ | |
2518 | aprop->pr_kind = property_remove; | |
2519 | updated = TRUE; | |
2520 | } | |
f7309df2 | 2521 | } |
fde51dd1 L |
2522 | else |
2523 | { | |
2524 | number = aprop->u.number; | |
2525 | aprop->u.number = number | bprop->u.number; | |
2526 | updated = number != (unsigned int) aprop->u.number; | |
2527 | } | |
2528 | return updated; | |
a9eafb08 L |
2529 | } |
2530 | else if (pr_type == GNU_PROPERTY_X86_COMPAT_ISA_1_NEEDED | |
2531 | || (pr_type >= GNU_PROPERTY_X86_UINT32_OR_LO | |
2532 | && pr_type <= GNU_PROPERTY_X86_UINT32_OR_HI)) | |
2533 | { | |
0afcef53 L |
2534 | if (aprop != NULL && bprop != NULL) |
2535 | { | |
2536 | number = aprop->u.number; | |
2537 | aprop->u.number = number | bprop->u.number; | |
f7309df2 | 2538 | /* Remove the property if all bits are empty. */ |
56ad703d L |
2539 | if (aprop->u.number == 0) |
2540 | { | |
2541 | aprop->pr_kind = property_remove; | |
2542 | updated = TRUE; | |
2543 | } | |
2544 | else | |
2545 | updated = number != (unsigned int) aprop->u.number; | |
0afcef53 L |
2546 | } |
2547 | else | |
2548 | { | |
56ad703d L |
2549 | /* Only one of APROP and BPROP can be NULL. */ |
2550 | if (aprop != NULL) | |
2551 | { | |
2552 | if (aprop->u.number == 0) | |
2553 | { | |
f7309df2 | 2554 | /* Remove APROP if all bits are empty. */ |
56ad703d L |
2555 | aprop->pr_kind = property_remove; |
2556 | updated = TRUE; | |
2557 | } | |
2558 | } | |
2559 | else | |
2560 | { | |
f7309df2 | 2561 | /* Return TRUE if APROP is NULL and all bits of BPROP |
56ad703d L |
2562 | aren't empty to indicate that BPROP should be added |
2563 | to ABFD. */ | |
2564 | updated = bprop->u.number != 0; | |
2565 | } | |
0afcef53 | 2566 | } |
a9eafb08 L |
2567 | return updated; |
2568 | } | |
2569 | else if (pr_type >= GNU_PROPERTY_X86_UINT32_AND_LO | |
2570 | && pr_type <= GNU_PROPERTY_X86_UINT32_AND_HI) | |
2571 | { | |
0afcef53 L |
2572 | /* Only one of APROP and BPROP can be NULL: |
2573 | 1. APROP & BPROP when both APROP and BPROP aren't NULL. | |
2574 | 2. If APROP is NULL, remove x86 feature. | |
2575 | 3. Otherwise, do nothing. | |
2576 | */ | |
5b9c07b2 L |
2577 | const struct elf_backend_data *bed |
2578 | = get_elf_backend_data (info->output_bfd); | |
2579 | struct elf_x86_link_hash_table *htab | |
2580 | = elf_x86_hash_table (info, bed->target_id); | |
2581 | if (!htab) | |
2582 | abort (); | |
0afcef53 L |
2583 | if (aprop != NULL && bprop != NULL) |
2584 | { | |
2585 | features = 0; | |
5b9c07b2 | 2586 | if (htab->params->ibt) |
0afcef53 | 2587 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; |
5b9c07b2 | 2588 | if (htab->params->shstk) |
0afcef53 L |
2589 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; |
2590 | number = aprop->u.number; | |
2591 | /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and | |
2592 | GNU_PROPERTY_X86_FEATURE_1_SHSTK. */ | |
2593 | aprop->u.number = (number & bprop->u.number) | features; | |
2594 | updated = number != (unsigned int) aprop->u.number; | |
2595 | /* Remove the property if all feature bits are cleared. */ | |
2596 | if (aprop->u.number == 0) | |
2597 | aprop->pr_kind = property_remove; | |
2598 | } | |
2599 | else | |
2600 | { | |
44b27f95 L |
2601 | /* There should be no AND properties since some input doesn't |
2602 | have them. Set IBT and SHSTK properties for -z ibt and -z | |
2603 | shstk if needed. */ | |
0afcef53 | 2604 | features = 0; |
5b9c07b2 | 2605 | if (htab->params->ibt) |
0afcef53 | 2606 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; |
5b9c07b2 | 2607 | if (htab->params->shstk) |
0afcef53 L |
2608 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; |
2609 | if (features) | |
2610 | { | |
0afcef53 L |
2611 | if (aprop != NULL) |
2612 | { | |
44b27f95 L |
2613 | updated = features != (unsigned int) aprop->u.number; |
2614 | aprop->u.number = features; | |
0afcef53 L |
2615 | } |
2616 | else | |
2617 | { | |
0afcef53 | 2618 | updated = TRUE; |
44b27f95 | 2619 | bprop->u.number = features; |
0afcef53 L |
2620 | } |
2621 | } | |
2622 | else if (aprop != NULL) | |
2623 | { | |
2624 | aprop->pr_kind = property_remove; | |
2625 | updated = TRUE; | |
2626 | } | |
2627 | } | |
a9eafb08 L |
2628 | return updated; |
2629 | } | |
2630 | else | |
2631 | { | |
0afcef53 L |
2632 | /* Never should happen. */ |
2633 | abort (); | |
2634 | } | |
2635 | ||
2636 | return updated; | |
2637 | } | |
a6798bab L |
2638 | |
2639 | /* Set up x86 GNU properties. Return the first relocatable ELF input | |
2640 | with GNU properties if found. Otherwise, return NULL. */ | |
2641 | ||
2642 | bfd * | |
2643 | _bfd_x86_elf_link_setup_gnu_properties | |
1de031c8 | 2644 | (struct bfd_link_info *info, struct elf_x86_init_table *init_table) |
a6798bab L |
2645 | { |
2646 | bfd_boolean normal_target; | |
2647 | bfd_boolean lazy_plt; | |
2648 | asection *sec, *pltsec; | |
2649 | bfd *dynobj; | |
2650 | bfd_boolean use_ibt_plt; | |
2651 | unsigned int plt_alignment, features; | |
2652 | struct elf_x86_link_hash_table *htab; | |
2653 | bfd *pbfd; | |
2654 | bfd *ebfd = NULL; | |
2655 | elf_property *prop; | |
2656 | const struct elf_backend_data *bed; | |
2657 | unsigned int class_align = ABI_64_P (info->output_bfd) ? 3 : 2; | |
2658 | unsigned int got_align; | |
2659 | ||
a6798bab L |
2660 | /* Find a normal input file with GNU property note. */ |
2661 | for (pbfd = info->input_bfds; | |
2662 | pbfd != NULL; | |
2663 | pbfd = pbfd->link.next) | |
2664 | if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour | |
2665 | && bfd_count_sections (pbfd) != 0) | |
2666 | { | |
2667 | ebfd = pbfd; | |
2668 | ||
2669 | if (elf_properties (pbfd) != NULL) | |
2670 | break; | |
2671 | } | |
2672 | ||
241e64e3 L |
2673 | bed = get_elf_backend_data (info->output_bfd); |
2674 | ||
2675 | htab = elf_x86_hash_table (info, bed->target_id); | |
2676 | if (htab == NULL) | |
2677 | return pbfd; | |
2678 | ||
5b9c07b2 L |
2679 | features = 0; |
2680 | if (htab->params->ibt) | |
233a0083 L |
2681 | { |
2682 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
2683 | htab->params->cet_report &= ~cet_report_ibt; | |
2684 | } | |
5b9c07b2 | 2685 | if (htab->params->shstk) |
233a0083 L |
2686 | { |
2687 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
2688 | htab->params->cet_report &= ~cet_report_shstk; | |
2689 | } | |
2690 | if (!(htab->params->cet_report & (cet_report_ibt | cet_report_shstk))) | |
2691 | htab->params->cet_report = cet_report_none; | |
5b9c07b2 | 2692 | |
241e64e3 | 2693 | if (ebfd != NULL) |
a6798bab | 2694 | { |
241e64e3 L |
2695 | prop = NULL; |
2696 | if (features) | |
2697 | { | |
2698 | /* If features is set, add GNU_PROPERTY_X86_FEATURE_1_IBT and | |
2699 | GNU_PROPERTY_X86_FEATURE_1_SHSTK. */ | |
2700 | prop = _bfd_elf_get_property (ebfd, | |
2701 | GNU_PROPERTY_X86_FEATURE_1_AND, | |
2702 | 4); | |
2703 | prop->u.number |= features; | |
2704 | prop->pr_kind = property_number; | |
2705 | } | |
a6798bab L |
2706 | |
2707 | /* Create the GNU property note section if needed. */ | |
241e64e3 | 2708 | if (prop != NULL && pbfd == NULL) |
a6798bab L |
2709 | { |
2710 | sec = bfd_make_section_with_flags (ebfd, | |
2711 | NOTE_GNU_PROPERTY_SECTION_NAME, | |
2712 | (SEC_ALLOC | |
2713 | | SEC_LOAD | |
2714 | | SEC_IN_MEMORY | |
2715 | | SEC_READONLY | |
2716 | | SEC_HAS_CONTENTS | |
2717 | | SEC_DATA)); | |
2718 | if (sec == NULL) | |
2c244f9b | 2719 | info->callbacks->einfo (_("%F%P: failed to create GNU property section\n")); |
a6798bab | 2720 | |
fd361982 | 2721 | if (!bfd_set_section_alignment (sec, class_align)) |
a6798bab | 2722 | { |
dc1e8a47 | 2723 | error_alignment: |
871b3ab2 | 2724 | info->callbacks->einfo (_("%F%pA: failed to align section\n"), |
a6798bab L |
2725 | sec); |
2726 | } | |
2727 | ||
2728 | elf_section_type (sec) = SHT_NOTE; | |
2729 | } | |
2730 | } | |
2731 | ||
233a0083 L |
2732 | if (htab->params->cet_report) |
2733 | { | |
2734 | /* Report missing IBT and SHSTK properties. */ | |
2735 | bfd *abfd; | |
2736 | const char *msg; | |
2737 | elf_property_list *p; | |
2738 | bfd_boolean missing_ibt, missing_shstk; | |
2739 | bfd_boolean check_ibt | |
2740 | = !!(htab->params->cet_report & cet_report_ibt); | |
2741 | bfd_boolean check_shstk | |
2742 | = !!(htab->params->cet_report & cet_report_shstk); | |
2743 | ||
2744 | if ((htab->params->cet_report & cet_report_warning)) | |
2745 | msg = _("%P: %pB: warning: missing %s\n"); | |
2746 | else | |
2747 | msg = _("%X%P: %pB: error: missing %s\n"); | |
2748 | ||
2749 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next) | |
2750 | if (!(abfd->flags & (DYNAMIC | BFD_PLUGIN | BFD_LINKER_CREATED)) | |
2751 | && bfd_get_flavour (abfd) == bfd_target_elf_flavour) | |
2752 | { | |
2753 | for (p = elf_properties (abfd); p; p = p->next) | |
2754 | if (p->property.pr_type == GNU_PROPERTY_X86_FEATURE_1_AND) | |
2755 | break; | |
2756 | ||
2757 | missing_ibt = check_ibt; | |
2758 | missing_shstk = check_shstk; | |
2759 | if (p) | |
2760 | { | |
2761 | missing_ibt &= !(p->property.u.number | |
2762 | & GNU_PROPERTY_X86_FEATURE_1_IBT); | |
2763 | missing_shstk &= !(p->property.u.number | |
2764 | & GNU_PROPERTY_X86_FEATURE_1_SHSTK); | |
2765 | } | |
2766 | if (missing_ibt || missing_shstk) | |
2767 | { | |
2768 | const char *missing; | |
2769 | if (missing_ibt && missing_shstk) | |
2770 | missing = _("IBT and SHSTK properties"); | |
2771 | else if (missing_ibt) | |
2772 | missing = _("IBT property"); | |
2773 | else | |
2774 | missing = _("SHSTK property"); | |
2775 | info->callbacks->einfo (msg, abfd, missing); | |
2776 | } | |
2777 | } | |
2778 | } | |
2779 | ||
a6798bab L |
2780 | pbfd = _bfd_elf_link_setup_gnu_properties (info); |
2781 | ||
1de031c8 L |
2782 | htab->r_info = init_table->r_info; |
2783 | htab->r_sym = init_table->r_sym; | |
7a382c1c L |
2784 | |
2785 | if (bfd_link_relocatable (info)) | |
2786 | return pbfd; | |
eeb2f20a | 2787 | |
851b6fa1 L |
2788 | htab->plt0_pad_byte = init_table->plt0_pad_byte; |
2789 | ||
5b9c07b2 | 2790 | use_ibt_plt = htab->params->ibtplt || htab->params->ibt; |
a6798bab L |
2791 | if (!use_ibt_plt && pbfd != NULL) |
2792 | { | |
2793 | /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */ | |
2794 | elf_property_list *p; | |
2795 | ||
2796 | /* The property list is sorted in order of type. */ | |
2797 | for (p = elf_properties (pbfd); p; p = p->next) | |
2798 | { | |
2799 | if (GNU_PROPERTY_X86_FEATURE_1_AND == p->property.pr_type) | |
2800 | { | |
2801 | use_ibt_plt = !!(p->property.u.number | |
2802 | & GNU_PROPERTY_X86_FEATURE_1_IBT); | |
2803 | break; | |
2804 | } | |
2805 | else if (GNU_PROPERTY_X86_FEATURE_1_AND < p->property.pr_type) | |
2806 | break; | |
2807 | } | |
2808 | } | |
2809 | ||
2810 | dynobj = htab->elf.dynobj; | |
2811 | ||
2812 | /* Set htab->elf.dynobj here so that there is no need to check and | |
2813 | set it in check_relocs. */ | |
2814 | if (dynobj == NULL) | |
2815 | { | |
2816 | if (pbfd != NULL) | |
2817 | { | |
2818 | htab->elf.dynobj = pbfd; | |
2819 | dynobj = pbfd; | |
2820 | } | |
2821 | else | |
2822 | { | |
2823 | bfd *abfd; | |
2824 | ||
2825 | /* Find a normal input file to hold linker created | |
2826 | sections. */ | |
2827 | for (abfd = info->input_bfds; | |
2828 | abfd != NULL; | |
2829 | abfd = abfd->link.next) | |
2830 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
2831 | && (abfd->flags | |
e4e6a73d L |
2832 | & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0 |
2833 | && bed->relocs_compatible (abfd->xvec, | |
2834 | info->output_bfd->xvec)) | |
a6798bab L |
2835 | { |
2836 | htab->elf.dynobj = abfd; | |
2837 | dynobj = abfd; | |
2838 | break; | |
2839 | } | |
2840 | } | |
2841 | } | |
2842 | ||
851b6fa1 L |
2843 | /* Return if there are no normal input files. */ |
2844 | if (dynobj == NULL) | |
2845 | return pbfd; | |
2846 | ||
a6798bab L |
2847 | /* Even when lazy binding is disabled by "-z now", the PLT0 entry may |
2848 | still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for | |
2849 | canonical function address. */ | |
2850 | htab->plt.has_plt0 = 1; | |
851b6fa1 | 2851 | normal_target = htab->target_os == is_normal; |
a6798bab L |
2852 | |
2853 | if (normal_target) | |
2854 | { | |
2855 | if (use_ibt_plt) | |
2856 | { | |
1de031c8 L |
2857 | htab->lazy_plt = init_table->lazy_ibt_plt; |
2858 | htab->non_lazy_plt = init_table->non_lazy_ibt_plt; | |
a6798bab L |
2859 | } |
2860 | else | |
2861 | { | |
1de031c8 L |
2862 | htab->lazy_plt = init_table->lazy_plt; |
2863 | htab->non_lazy_plt = init_table->non_lazy_plt; | |
a6798bab L |
2864 | } |
2865 | } | |
2866 | else | |
2867 | { | |
1de031c8 | 2868 | htab->lazy_plt = init_table->lazy_plt; |
a6798bab L |
2869 | htab->non_lazy_plt = NULL; |
2870 | } | |
2871 | ||
2872 | pltsec = htab->elf.splt; | |
2873 | ||
2874 | /* If the non-lazy PLT is available, use it for all PLT entries if | |
2875 | there are no PLT0 or no .plt section. */ | |
2876 | if (htab->non_lazy_plt != NULL | |
2877 | && (!htab->plt.has_plt0 || pltsec == NULL)) | |
2878 | { | |
2879 | lazy_plt = FALSE; | |
2880 | if (bfd_link_pic (info)) | |
2881 | htab->plt.plt_entry = htab->non_lazy_plt->pic_plt_entry; | |
2882 | else | |
2883 | htab->plt.plt_entry = htab->non_lazy_plt->plt_entry; | |
2884 | htab->plt.plt_entry_size = htab->non_lazy_plt->plt_entry_size; | |
2885 | htab->plt.plt_got_offset = htab->non_lazy_plt->plt_got_offset; | |
2886 | htab->plt.plt_got_insn_size | |
2887 | = htab->non_lazy_plt->plt_got_insn_size; | |
2888 | htab->plt.eh_frame_plt_size | |
2889 | = htab->non_lazy_plt->eh_frame_plt_size; | |
2890 | htab->plt.eh_frame_plt = htab->non_lazy_plt->eh_frame_plt; | |
2891 | } | |
2892 | else | |
2893 | { | |
2894 | lazy_plt = TRUE; | |
2895 | if (bfd_link_pic (info)) | |
2896 | { | |
2897 | htab->plt.plt0_entry = htab->lazy_plt->pic_plt0_entry; | |
2898 | htab->plt.plt_entry = htab->lazy_plt->pic_plt_entry; | |
2899 | } | |
2900 | else | |
2901 | { | |
2902 | htab->plt.plt0_entry = htab->lazy_plt->plt0_entry; | |
2903 | htab->plt.plt_entry = htab->lazy_plt->plt_entry; | |
2904 | } | |
2905 | htab->plt.plt_entry_size = htab->lazy_plt->plt_entry_size; | |
2906 | htab->plt.plt_got_offset = htab->lazy_plt->plt_got_offset; | |
2907 | htab->plt.plt_got_insn_size | |
2908 | = htab->lazy_plt->plt_got_insn_size; | |
2909 | htab->plt.eh_frame_plt_size | |
2910 | = htab->lazy_plt->eh_frame_plt_size; | |
2911 | htab->plt.eh_frame_plt = htab->lazy_plt->eh_frame_plt; | |
2912 | } | |
2913 | ||
851b6fa1 | 2914 | if (htab->target_os == is_vxworks |
a6798bab L |
2915 | && !elf_vxworks_create_dynamic_sections (dynobj, info, |
2916 | &htab->srelplt2)) | |
2917 | { | |
2c244f9b | 2918 | info->callbacks->einfo (_("%F%P: failed to create VxWorks dynamic sections\n")); |
a6798bab L |
2919 | return pbfd; |
2920 | } | |
2921 | ||
2922 | /* Since create_dynamic_sections isn't always called, but GOT | |
2923 | relocations need GOT relocations, create them here so that we | |
2924 | don't need to do it in check_relocs. */ | |
2925 | if (htab->elf.sgot == NULL | |
2926 | && !_bfd_elf_create_got_section (dynobj, info)) | |
2c244f9b | 2927 | info->callbacks->einfo (_("%F%P: failed to create GOT sections\n")); |
a6798bab L |
2928 | |
2929 | got_align = (bed->target_id == X86_64_ELF_DATA) ? 3 : 2; | |
2930 | ||
2931 | /* Align .got and .got.plt sections to their entry size. Do it here | |
2932 | instead of in create_dynamic_sections so that they are always | |
2933 | properly aligned even if create_dynamic_sections isn't called. */ | |
2934 | sec = htab->elf.sgot; | |
fd361982 | 2935 | if (!bfd_set_section_alignment (sec, got_align)) |
a6798bab L |
2936 | goto error_alignment; |
2937 | ||
2938 | sec = htab->elf.sgotplt; | |
fd361982 | 2939 | if (!bfd_set_section_alignment (sec, got_align)) |
a6798bab L |
2940 | goto error_alignment; |
2941 | ||
2942 | /* Create the ifunc sections here so that check_relocs can be | |
2943 | simplified. */ | |
2944 | if (!_bfd_elf_create_ifunc_sections (dynobj, info)) | |
2c244f9b | 2945 | info->callbacks->einfo (_("%F%P: failed to create ifunc sections\n")); |
a6798bab L |
2946 | |
2947 | plt_alignment = bfd_log2 (htab->plt.plt_entry_size); | |
2948 | ||
2949 | if (pltsec != NULL) | |
2950 | { | |
2951 | /* Whe creating executable, set the contents of the .interp | |
2952 | section to the interpreter. */ | |
2953 | if (bfd_link_executable (info) && !info->nointerp) | |
2954 | { | |
2955 | asection *s = bfd_get_linker_section (dynobj, ".interp"); | |
2956 | if (s == NULL) | |
2957 | abort (); | |
2958 | s->size = htab->dynamic_interpreter_size; | |
2959 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
2960 | htab->interp = s; | |
2961 | } | |
2962 | ||
2963 | /* Don't change PLT section alignment for NaCl since it uses | |
2964 | 64-byte PLT entry and sets PLT section alignment to 32 | |
2965 | bytes. Don't create additional PLT sections for NaCl. */ | |
2966 | if (normal_target) | |
2967 | { | |
2968 | flagword pltflags = (bed->dynamic_sec_flags | |
2969 | | SEC_ALLOC | |
2970 | | SEC_CODE | |
2971 | | SEC_LOAD | |
2972 | | SEC_READONLY); | |
2973 | unsigned int non_lazy_plt_alignment | |
2974 | = bfd_log2 (htab->non_lazy_plt->plt_entry_size); | |
2975 | ||
2976 | sec = pltsec; | |
fd361982 | 2977 | if (!bfd_set_section_alignment (sec, plt_alignment)) |
a6798bab L |
2978 | goto error_alignment; |
2979 | ||
2980 | /* Create the GOT procedure linkage table. */ | |
2981 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
2982 | ".plt.got", | |
2983 | pltflags); | |
2984 | if (sec == NULL) | |
2c244f9b | 2985 | info->callbacks->einfo (_("%F%P: failed to create GOT PLT section\n")); |
a6798bab | 2986 | |
fd361982 | 2987 | if (!bfd_set_section_alignment (sec, non_lazy_plt_alignment)) |
a6798bab L |
2988 | goto error_alignment; |
2989 | ||
2990 | htab->plt_got = sec; | |
2991 | ||
2992 | if (lazy_plt) | |
2993 | { | |
2994 | sec = NULL; | |
2995 | ||
2996 | if (use_ibt_plt) | |
2997 | { | |
2998 | /* Create the second PLT for Intel IBT support. IBT | |
2999 | PLT is supported only for non-NaCl target and is | |
3000 | is needed only for lazy binding. */ | |
3001 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
3002 | ".plt.sec", | |
3003 | pltflags); | |
3004 | if (sec == NULL) | |
2c244f9b | 3005 | info->callbacks->einfo (_("%F%P: failed to create IBT-enabled PLT section\n")); |
a6798bab | 3006 | |
fd361982 | 3007 | if (!bfd_set_section_alignment (sec, plt_alignment)) |
a6798bab L |
3008 | goto error_alignment; |
3009 | } | |
5b9c07b2 | 3010 | else if (htab->params->bndplt && ABI_64_P (dynobj)) |
a6798bab L |
3011 | { |
3012 | /* Create the second PLT for Intel MPX support. MPX | |
3013 | PLT is supported only for non-NaCl target in 64-bit | |
3014 | mode and is needed only for lazy binding. */ | |
3015 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
3016 | ".plt.sec", | |
3017 | pltflags); | |
3018 | if (sec == NULL) | |
2c244f9b | 3019 | info->callbacks->einfo (_("%F%P: failed to create BND PLT section\n")); |
a6798bab | 3020 | |
fd361982 | 3021 | if (!bfd_set_section_alignment (sec, non_lazy_plt_alignment)) |
a6798bab L |
3022 | goto error_alignment; |
3023 | } | |
3024 | ||
3025 | htab->plt_second = sec; | |
3026 | } | |
3027 | } | |
3028 | ||
3029 | if (!info->no_ld_generated_unwind_info) | |
3030 | { | |
3031 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
3032 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
3033 | | SEC_LINKER_CREATED); | |
3034 | ||
3035 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
3036 | ".eh_frame", | |
3037 | flags); | |
3038 | if (sec == NULL) | |
2c244f9b | 3039 | info->callbacks->einfo (_("%F%P: failed to create PLT .eh_frame section\n")); |
a6798bab | 3040 | |
fd361982 | 3041 | if (!bfd_set_section_alignment (sec, class_align)) |
a6798bab L |
3042 | goto error_alignment; |
3043 | ||
3044 | htab->plt_eh_frame = sec; | |
3045 | ||
3046 | if (htab->plt_got != NULL) | |
3047 | { | |
3048 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
3049 | ".eh_frame", | |
3050 | flags); | |
3051 | if (sec == NULL) | |
2c244f9b | 3052 | info->callbacks->einfo (_("%F%P: failed to create GOT PLT .eh_frame section\n")); |
a6798bab | 3053 | |
fd361982 | 3054 | if (!bfd_set_section_alignment (sec, class_align)) |
a6798bab L |
3055 | goto error_alignment; |
3056 | ||
3057 | htab->plt_got_eh_frame = sec; | |
3058 | } | |
3059 | ||
3060 | if (htab->plt_second != NULL) | |
3061 | { | |
3062 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
3063 | ".eh_frame", | |
3064 | flags); | |
3065 | if (sec == NULL) | |
2c244f9b | 3066 | info->callbacks->einfo (_("%F%P: failed to create the second PLT .eh_frame section\n")); |
a6798bab | 3067 | |
fd361982 | 3068 | if (!bfd_set_section_alignment (sec, class_align)) |
a6798bab L |
3069 | goto error_alignment; |
3070 | ||
3071 | htab->plt_second_eh_frame = sec; | |
3072 | } | |
3073 | } | |
3074 | } | |
3075 | ||
b44ee3a8 L |
3076 | /* The .iplt section is used for IFUNC symbols in static |
3077 | executables. */ | |
3078 | sec = htab->elf.iplt; | |
3079 | if (sec != NULL) | |
a6798bab | 3080 | { |
b44ee3a8 L |
3081 | /* NB: Delay setting its alignment until we know it is non-empty. |
3082 | Otherwise an empty iplt section may change vma and lma of the | |
3083 | following sections, which triggers moving dot of the following | |
3084 | section backwards, resulting in a warning and section lma not | |
3085 | being set properly. It later leads to a "File truncated" | |
3086 | error. */ | |
fd361982 | 3087 | if (!bfd_set_section_alignment (sec, 0)) |
a6798bab | 3088 | goto error_alignment; |
b44ee3a8 L |
3089 | |
3090 | htab->plt.iplt_alignment = (normal_target | |
3091 | ? plt_alignment | |
3092 | : bed->plt_alignment); | |
a6798bab L |
3093 | } |
3094 | ||
74e10d17 L |
3095 | if (bfd_link_executable (info) |
3096 | && !info->nointerp | |
3097 | && !htab->params->has_dynamic_linker | |
3098 | && htab->params->static_before_all_inputs) | |
3099 | { | |
3100 | /* Report error for dynamic input objects if -static is passed at | |
3101 | command-line before all input files without --dynamic-linker | |
3102 | unless --no-dynamic-linker is used. */ | |
3103 | bfd *abfd; | |
3104 | ||
3105 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next) | |
3106 | if ((abfd->flags & DYNAMIC)) | |
3107 | info->callbacks->einfo | |
3108 | (_("%X%P: attempted static link of dynamic object `%pB'\n"), | |
3109 | abfd); | |
3110 | } | |
3111 | ||
a6798bab L |
3112 | return pbfd; |
3113 | } | |
bfb1e8c1 L |
3114 | |
3115 | /* Fix up x86 GNU properties. */ | |
3116 | ||
3117 | void | |
0a59decb L |
3118 | _bfd_x86_elf_link_fixup_gnu_properties |
3119 | (struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
3120 | elf_property_list **listp) | |
bfb1e8c1 L |
3121 | { |
3122 | elf_property_list *p; | |
3123 | ||
3124 | for (p = *listp; p; p = p->next) | |
a9eafb08 L |
3125 | { |
3126 | unsigned int type = p->property.pr_type; | |
3127 | if (type == GNU_PROPERTY_X86_COMPAT_ISA_1_USED | |
3128 | || type == GNU_PROPERTY_X86_COMPAT_ISA_1_NEEDED | |
3129 | || (type >= GNU_PROPERTY_X86_UINT32_AND_LO | |
3130 | && type <= GNU_PROPERTY_X86_UINT32_AND_HI) | |
3131 | || (type >= GNU_PROPERTY_X86_UINT32_OR_LO | |
3132 | && type <= GNU_PROPERTY_X86_UINT32_OR_HI) | |
3133 | || (type >= GNU_PROPERTY_X86_UINT32_OR_AND_LO | |
3134 | && type <= GNU_PROPERTY_X86_UINT32_OR_AND_HI)) | |
3135 | { | |
fde51dd1 L |
3136 | if (p->property.u.number == 0 |
3137 | && (type == GNU_PROPERTY_X86_COMPAT_ISA_1_NEEDED | |
3138 | || (type >= GNU_PROPERTY_X86_UINT32_AND_LO | |
3139 | && type <= GNU_PROPERTY_X86_UINT32_AND_HI) | |
3140 | || (type >= GNU_PROPERTY_X86_UINT32_OR_LO | |
3141 | && type <= GNU_PROPERTY_X86_UINT32_OR_HI))) | |
a9eafb08 L |
3142 | { |
3143 | /* Remove empty property. */ | |
3144 | *listp = p->next; | |
3145 | continue; | |
3146 | } | |
aa7bca9b | 3147 | |
a9eafb08 L |
3148 | listp = &p->next; |
3149 | } | |
3150 | else if (type > GNU_PROPERTY_HIPROC) | |
3151 | { | |
3152 | /* The property list is sorted in order of type. */ | |
3153 | break; | |
3154 | } | |
3155 | } | |
bfb1e8c1 | 3156 | } |
5b9c07b2 L |
3157 | |
3158 | void | |
3159 | _bfd_elf_linker_x86_set_options (struct bfd_link_info * info, | |
3160 | struct elf_linker_x86_params *params) | |
3161 | { | |
3162 | const struct elf_backend_data *bed | |
3163 | = get_elf_backend_data (info->output_bfd); | |
3164 | struct elf_x86_link_hash_table *htab | |
3165 | = elf_x86_hash_table (info, bed->target_id); | |
3166 | if (htab != NULL) | |
3167 | htab->params = params; | |
3168 | } |