1 /* x86 specific support for ELF
2 Copyright (C) 2017-2018 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
26 #include "bfd_stdint.h"
29 #define PLT_CIE_LENGTH 20
30 #define PLT_FDE_LENGTH 36
31 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
32 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
34 #define ABI_64_P(abfd) \
35 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
37 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
38 copying dynamic variables from a shared lib into an app's dynbss
39 section, and instead use a dynamic relocation to point into the
41 #define ELIMINATE_COPY_RELOCS 1
43 #define elf_x86_hash_table(p, id) \
44 (is_elf_hash_table ((p)->hash) \
45 && elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) == (id) \
46 ? ((struct elf_x86_link_hash_table *) ((p)->hash)) : NULL)
48 /* Will references to this symbol always be local in this object? */
49 #define SYMBOL_REFERENCES_LOCAL_P(INFO, H) \
50 _bfd_x86_elf_link_symbol_references_local ((INFO), (H))
52 /* TRUE if an undefined weak symbol should be resolved to 0. Local
53 undefined weak symbol is always resolved to 0. Reference to an
54 undefined weak symbol is resolved to 0 in executable if undefined
55 weak symbol should be resolved to 0 (zero_undefweak > 0). */
56 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, EH) \
57 ((EH)->elf.root.type == bfd_link_hash_undefweak \
58 && (SYMBOL_REFERENCES_LOCAL_P ((INFO), &(EH)->elf) \
59 || (bfd_link_executable (INFO) \
60 && (EH)->zero_undefweak > 0)))
62 /* Should copy relocation be generated for a symbol. Don't generate
63 copy relocation against a protected symbol defined in a shared
64 object with GNU_PROPERTY_NO_COPY_ON_PROTECTED. */
65 #define SYMBOL_NO_COPYRELOC(INFO, EH) \
66 ((EH)->def_protected \
67 && ((EH)->elf.root.type == bfd_link_hash_defined \
68 || (EH)->elf.root.type == bfd_link_hash_defweak) \
69 && elf_has_no_copy_on_protected ((EH)->elf.root.u.def.section->owner) \
70 && ((EH)->elf.root.u.def.section->owner->flags & DYNAMIC) != 0 \
71 && ((EH)->elf.root.u.def.section->flags & SEC_CODE) == 0)
73 /* TRUE if dynamic relocation is needed. If we are creating a shared
74 library, and this is a reloc against a global symbol, or a non PC
75 relative reloc against a local symbol, then we need to copy the reloc
76 into the shared library. However, if we are linking with -Bsymbolic,
77 we do not need to copy a reloc against a global symbol which is
78 defined in an object we are including in the link (i.e., DEF_REGULAR
81 If PCREL_PLT is true, don't generate dynamic relocation in PIE for
82 PC-relative relocation against a dynamic function definition in data
83 section when PLT address can be used.
85 If on the other hand, we are creating an executable, we may need to
86 keep relocations for symbols satisfied by a dynamic library if we
87 manage to avoid copy relocs for the symbol.
89 We also need to generate dynamic pointer relocation against
90 STT_GNU_IFUNC symbol in the non-code section. */
91 #define NEED_DYNAMIC_RELOCATION_P(INFO, PCREL_PLT, H, SEC, R_TYPE, \
93 ((bfd_link_pic (INFO) \
94 && (! X86_PCREL_TYPE_P (R_TYPE) \
96 && (! (bfd_link_pie (INFO) \
97 || SYMBOLIC_BIND ((INFO), (H))) \
98 || (H)->root.type == bfd_link_hash_defweak \
99 || (!(bfd_link_pie (INFO) \
101 && (H)->plt.refcount > 0 \
102 && ((SEC)->flags & SEC_CODE) == 0 \
103 && (H)->type == STT_FUNC \
104 && (H)->def_dynamic) \
105 && !(H)->def_regular))))) \
107 && (H)->type == STT_GNU_IFUNC \
108 && (R_TYPE) == POINTER_TYPE \
109 && ((SEC)->flags & SEC_CODE) == 0) \
110 || (ELIMINATE_COPY_RELOCS \
111 && !bfd_link_pic (INFO) \
113 && ((H)->root.type == bfd_link_hash_defweak \
114 || !(H)->def_regular)))
116 /* TRUE if dynamic relocation should be generated. Don't copy a
117 pc-relative relocation into the output file if the symbol needs
118 copy reloc or the symbol is undefined when building executable.
119 Copy dynamic function pointer relocations. Don't generate dynamic
120 relocations against resolved undefined weak symbols in PIE, except
121 when PC32_RELOC is TRUE. Undefined weak symbol is bound locally
122 when PIC is false. */
123 #define GENERATE_DYNAMIC_RELOCATION_P(INFO, EH, R_TYPE, \
124 NEED_COPY_RELOC_IN_PIE, \
125 RESOLVED_TO_ZERO, PC32_RELOC) \
126 ((bfd_link_pic (INFO) \
127 && !(NEED_COPY_RELOC_IN_PIE) \
129 || ((ELF_ST_VISIBILITY ((EH)->elf.other) == STV_DEFAULT \
130 && (!(RESOLVED_TO_ZERO) || PC32_RELOC)) \
131 || (EH)->elf.root.type != bfd_link_hash_undefweak)) \
132 && ((!X86_PCREL_TYPE_P (R_TYPE) \
133 && !X86_SIZE_TYPE_P (R_TYPE)) \
134 || ! SYMBOL_CALLS_LOCAL ((INFO), &(EH)->elf))) \
135 || (ELIMINATE_COPY_RELOCS \
136 && !bfd_link_pic (INFO) \
138 && (EH)->elf.dynindx != -1 \
139 && (!(EH)->elf.non_got_ref \
140 || ((EH)->elf.root.type == bfd_link_hash_undefweak \
141 && !(RESOLVED_TO_ZERO))) \
142 && (((EH)->elf.def_dynamic && !(EH)->elf.def_regular) \
143 || (EH)->elf.root.type == bfd_link_hash_undefined)))
145 /* TRUE if this input relocation should be copied to output. H->dynindx
146 may be -1 if this symbol was marked to become local. */
147 #define COPY_INPUT_RELOC_P(INFO, H, R_TYPE) \
149 && (H)->dynindx != -1 \
150 && (X86_PCREL_TYPE_P (R_TYPE) \
151 || !(bfd_link_executable (INFO) || SYMBOLIC_BIND ((INFO), (H))) \
152 || !(H)->def_regular))
154 /* TRUE if this is actually a static link, or it is a -Bsymbolic link
155 and the symbol is defined locally, or the symbol was forced to be
156 local because of a version file. */
157 #define RESOLVED_LOCALLY_P(INFO, H, HTAB) \
158 (!WILL_CALL_FINISH_DYNAMIC_SYMBOL ((HTAB)->elf.dynamic_sections_created, \
159 bfd_link_pic (INFO), (H)) \
160 || (bfd_link_pic (INFO) \
161 && SYMBOL_REFERENCES_LOCAL_P ((INFO), (H))) \
162 || (ELF_ST_VISIBILITY ((H)->other) \
163 && (H)->root.type == bfd_link_hash_undefweak))
165 /* TRUE if relative relocation should be generated. GOT reference to
166 global symbol in PIC will lead to dynamic symbol. It becomes a
167 problem when "time" or "times" is defined as a variable in an
168 executable, clashing with functions of the same name in libc. If a
169 symbol isn't undefined weak symbol, don't make it dynamic in PIC and
170 generate relative relocation. */
171 #define GENERATE_RELATIVE_RELOC_P(INFO, H) \
172 ((H)->dynindx == -1 \
173 && !(H)->forced_local \
174 && (H)->root.type != bfd_link_hash_undefweak \
175 && bfd_link_pic (INFO))
177 /* TRUE if this is a pointer reference to a local IFUNC. */
178 #define POINTER_LOCAL_IFUNC_P(INFO, H) \
179 ((H)->dynindx == -1 \
180 || (H)->forced_local \
181 || bfd_link_executable (INFO))
183 /* TRUE if this is a PLT reference to a local IFUNC. */
184 #define PLT_LOCAL_IFUNC_P(INFO, H) \
185 ((H)->dynindx == -1 \
186 || ((bfd_link_executable (INFO) \
187 || ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT) \
188 && (H)->def_regular \
189 && (H)->type == STT_GNU_IFUNC))
191 /* TRUE if TLS IE->LE transition is OK. */
192 #define TLS_TRANSITION_IE_TO_LE_P(INFO, H, TLS_TYPE) \
193 (bfd_link_executable (INFO) \
195 && (H)->dynindx == -1 \
196 && (TLS_TYPE & GOT_TLS_IE))
198 /* Verify that the symbol has an entry in the procedure linkage table. */
199 #define VERIFY_PLT_ENTRY(INFO, H, PLT, GOTPLT, RELPLT, LOCAL_UNDEFWEAK) \
202 if (((H)->dynindx == -1 \
203 && !LOCAL_UNDEFWEAK \
204 && !(((H)->forced_local || bfd_link_executable (INFO)) \
205 && (H)->def_regular \
206 && (H)->type == STT_GNU_IFUNC)) \
208 || (GOTPLT) == NULL \
209 || (RELPLT) == NULL) \
214 /* Verify that the symbol supports copy relocation. */
215 #define VERIFY_COPY_RELOC(H, HTAB) \
218 if ((H)->dynindx == -1 \
219 || ((H)->root.type != bfd_link_hash_defined \
220 && (H)->root.type != bfd_link_hash_defweak) \
221 || (HTAB)->elf.srelbss == NULL \
222 || (HTAB)->elf.sreldynrelro == NULL) \
227 /* x86 ELF linker hash entry. */
229 struct elf_x86_link_hash_entry
231 struct elf_link_hash_entry elf;
233 /* Track dynamic relocs copied for this symbol. */
234 struct elf_dyn_relocs *dyn_relocs;
236 unsigned char tls_type;
238 /* Bit 0: Symbol has no GOT nor PLT relocations.
239 Bit 1: Symbol has non-GOT/non-PLT relocations in text sections.
240 zero_undefweak is initialized to 1 and undefined weak symbol
241 should be resolved to 0 if zero_undefweak > 0. */
242 unsigned int zero_undefweak : 2;
244 /* Don't call finish_dynamic_symbol on this symbol. */
245 unsigned int no_finish_dynamic_symbol : 1;
247 /* TRUE if symbol is __tls_get_addr. */
248 unsigned int tls_get_addr : 1;
250 /* TRUE if symbol is defined as a protected symbol. */
251 unsigned int def_protected : 1;
253 /* 0: Symbol references are unknown.
254 1: Symbol references aren't local.
255 2: Symbol references are local.
257 unsigned int local_ref : 2;
259 /* TRUE if symbol is defined by linker. */
260 unsigned int linker_def : 1;
262 /* TRUE if symbol is referenced by R_386_GOTOFF relocation. This is
263 only used by i386. */
264 unsigned int gotoff_ref : 1;
266 /* TRUE if a weak symbol with a real definition needs a copy reloc.
267 When there is a weak symbol with a real definition, the processor
268 independent code will have arranged for us to see the real
269 definition first. We need to copy the needs_copy bit from the
270 real definition and check it when allowing copy reloc in PIE. This
271 is only used by x86-64. */
272 unsigned int needs_copy : 1;
274 /* Information about the GOT PLT entry. Filled when there are both
275 GOT and PLT relocations against the same function. */
276 union gotplt_union plt_got;
278 /* Information about the second PLT entry. */
279 union gotplt_union plt_second;
281 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
282 starting at the end of the jump table. */
286 struct elf_x86_lazy_plt_layout
288 /* The first entry in a lazy procedure linkage table looks like this. */
289 const bfd_byte *plt0_entry;
290 unsigned int plt0_entry_size; /* Size of PLT0 entry. */
292 /* Later entries in a lazy procedure linkage table look like this. */
293 const bfd_byte *plt_entry;
294 unsigned int plt_entry_size; /* Size of each PLT entry. */
296 /* The TLSDESC entry in a lazy procedure linkage table looks like
297 this. This is for x86-64 only. */
298 const bfd_byte *plt_tlsdesc_entry;
299 unsigned int plt_tlsdesc_entry_size; /* Size of TLSDESC entry. */
301 /* Offsets into the TLSDESC entry that are to be replaced with
302 GOT+8 and GOT+TDG. These are for x86-64 only. */
303 unsigned int plt_tlsdesc_got1_offset;
304 unsigned int plt_tlsdesc_got2_offset;
306 /* Offset of the end of the PC-relative instructions containing
307 plt_tlsdesc_got1_offset and plt_tlsdesc_got2_offset. These
308 are for x86-64 only. */
309 unsigned int plt_tlsdesc_got1_insn_end;
310 unsigned int plt_tlsdesc_got2_insn_end;
312 /* Offsets into plt0_entry that are to be replaced with GOT[1] and
314 unsigned int plt0_got1_offset;
315 unsigned int plt0_got2_offset;
317 /* Offset of the end of the PC-relative instruction containing
318 plt0_got2_offset. This is for x86-64 only. */
319 unsigned int plt0_got2_insn_end;
321 /* Offsets into plt_entry that are to be replaced with... */
322 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
323 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
324 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
326 /* Length of the PC-relative instruction containing plt_got_offset.
327 This is used for x86-64 only. */
328 unsigned int plt_got_insn_size;
330 /* Offset of the end of the PC-relative jump to plt0_entry. This is
331 used for x86-64 only. */
332 unsigned int plt_plt_insn_end;
334 /* Offset into plt_entry where the initial value of the GOT entry
336 unsigned int plt_lazy_offset;
338 /* The first entry in a PIC lazy procedure linkage table looks like
340 const bfd_byte *pic_plt0_entry;
342 /* Subsequent entries in a PIC lazy procedure linkage table look
344 const bfd_byte *pic_plt_entry;
346 /* .eh_frame covering the lazy .plt section. */
347 const bfd_byte *eh_frame_plt;
348 unsigned int eh_frame_plt_size;
351 struct elf_x86_non_lazy_plt_layout
353 /* Entries in a non-lazy procedure linkage table look like this. */
354 const bfd_byte *plt_entry;
355 /* Entries in a PIC non-lazy procedure linkage table look like this.
356 This is only used for i386 where absolute PLT and PIC PLT are
358 const bfd_byte *pic_plt_entry;
360 unsigned int plt_entry_size; /* Size of each PLT entry. */
362 /* Offsets into plt_entry that are to be replaced with... */
363 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
365 /* Length of the PC-relative instruction containing plt_got_offset.
366 This is used for x86-64 only. */
367 unsigned int plt_got_insn_size;
369 /* .eh_frame covering the non-lazy .plt section. */
370 const bfd_byte *eh_frame_plt;
371 unsigned int eh_frame_plt_size;
374 struct elf_x86_plt_layout
376 /* The first entry in a lazy procedure linkage table looks like this. */
377 const bfd_byte *plt0_entry;
378 /* Entries in a procedure linkage table look like this. */
379 const bfd_byte *plt_entry;
380 unsigned int plt_entry_size; /* Size of each PLT entry. */
383 unsigned int has_plt0;
385 /* Offsets into plt_entry that are to be replaced with... */
386 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
388 /* Length of the PC-relative instruction containing plt_got_offset.
389 This is only used for x86-64. */
390 unsigned int plt_got_insn_size;
392 /* Alignment of the .iplt section. */
393 unsigned int iplt_alignment;
395 /* .eh_frame covering the .plt section. */
396 const bfd_byte *eh_frame_plt;
397 unsigned int eh_frame_plt_size;
400 /* Values in tls_type of x86 ELF linker hash entry. */
401 #define GOT_UNKNOWN 0
405 #define GOT_TLS_IE_POS 5
406 #define GOT_TLS_IE_NEG 6
407 #define GOT_TLS_IE_BOTH 7
408 #define GOT_TLS_GDESC 8
409 #define GOT_TLS_GD_BOTH_P(type) \
410 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
411 #define GOT_TLS_GD_P(type) \
412 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
413 #define GOT_TLS_GDESC_P(type) \
414 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
415 #define GOT_TLS_GD_ANY_P(type) \
416 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
418 #define elf_x86_hash_entry(ent) \
419 ((struct elf_x86_link_hash_entry *)(ent))
421 enum elf_x86_target_os
429 /* x86 ELF linker hash table. */
431 struct elf_x86_link_hash_table
433 struct elf_link_hash_table elf;
435 /* Short-cuts to get to dynamic linker sections. */
437 asection *plt_eh_frame;
438 asection *plt_second;
439 asection *plt_second_eh_frame;
441 asection *plt_got_eh_frame;
443 /* Parameters describing PLT generation, lazy or non-lazy. */
444 struct elf_x86_plt_layout plt;
446 /* Parameters describing lazy PLT generation. */
447 const struct elf_x86_lazy_plt_layout *lazy_plt;
449 /* Parameters describing non-lazy PLT generation. */
450 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
454 bfd_signed_vma refcount;
458 /* The amount of space used by the jump slots in the GOT. */
459 bfd_vma sgotplt_jump_table_size;
461 /* Small local sym cache. */
462 struct sym_cache sym_cache;
464 /* _TLS_MODULE_BASE_ symbol. */
465 struct bfd_link_hash_entry *tls_module_base;
467 /* Used by local STT_GNU_IFUNC symbols. */
468 htab_t loc_hash_table;
469 void * loc_hash_memory;
471 /* The offset into sgot of the GOT entry used by the PLT entry
475 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
476 bfd_vma next_jump_slot_index;
477 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
478 bfd_vma next_irelative_index;
480 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
481 to read-only sections. */
482 bfd_boolean readonly_dynrelocs_against_ifunc;
484 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks.
485 This is used for i386 only. */
488 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. This
489 is only used for i386. */
490 bfd_vma next_tls_desc_index;
492 /* The offset into splt of the PLT entry for the TLS descriptor
493 resolver. Special values are 0, if not necessary (or not found
494 to be necessary yet), and -1 if needed but not determined
495 yet. This is only used for x86-64. */
498 /* Value used to fill the unused bytes of the first PLT entry. This
499 is only used for i386. */
500 bfd_byte plt0_pad_byte;
502 /* TRUE if GOT is referenced. */
503 unsigned int got_referenced : 1;
505 /* TRUE if PLT is PC-relative. PLT in PDE and PC-relative PLT in PIE
506 can be used as function address.
508 NB: i386 has non-PIC PLT and PIC PLT. Only non-PIC PLT in PDE can
509 be used as function address. PIC PLT in PIE can't be used as
511 unsigned int pcrel_plt : 1;
513 bfd_vma (*r_info) (bfd_vma, bfd_vma);
514 bfd_vma (*r_sym) (bfd_vma);
515 bfd_boolean (*is_reloc_section) (const char *);
516 enum elf_target_id target_id;
517 enum elf_x86_target_os target_os;
518 unsigned int sizeof_reloc;
519 unsigned int dt_reloc;
520 unsigned int dt_reloc_sz;
521 unsigned int dt_reloc_ent;
522 unsigned int got_entry_size;
523 unsigned int pointer_r_type;
524 int dynamic_interpreter_size;
525 const char *dynamic_interpreter;
526 const char *tls_get_addr;
529 /* Architecture-specific backend data for x86. */
531 struct elf_x86_backend_data
534 enum elf_x86_target_os target_os;
537 #define get_elf_x86_backend_data(abfd) \
538 ((const struct elf_x86_backend_data *) \
539 get_elf_backend_data (abfd)->arch_data)
541 struct elf_x86_init_table
543 /* The lazy PLT layout. */
544 const struct elf_x86_lazy_plt_layout *lazy_plt;
546 /* The non-lazy PLT layout. */
547 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
549 /* The lazy PLT layout for IBT. */
550 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
552 /* The non-lazy PLT layout for IBT. */
553 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
555 bfd_byte plt0_pad_byte;
557 bfd_vma (*r_info) (bfd_vma, bfd_vma);
558 bfd_vma (*r_sym) (bfd_vma);
561 struct elf_x86_obj_tdata
563 struct elf_obj_tdata root;
565 /* tls_type for each local got entry. */
566 char *local_got_tls_type;
568 /* GOTPLT entries for TLS descriptors. */
569 bfd_vma *local_tlsdesc_gotent;
572 enum elf_x86_plt_type
586 enum elf_x86_plt_type type;
587 unsigned int plt_got_offset;
588 unsigned int plt_entry_size;
589 unsigned int plt_got_insn_size; /* Only used for x86-64. */
593 #define elf_x86_tdata(abfd) \
594 ((struct elf_x86_obj_tdata *) (abfd)->tdata.any)
596 #define elf_x86_local_got_tls_type(abfd) \
597 (elf_x86_tdata (abfd)->local_got_tls_type)
599 #define elf_x86_local_tlsdesc_gotent(abfd) \
600 (elf_x86_tdata (abfd)->local_tlsdesc_gotent)
602 #define elf_x86_compute_jump_table_size(htab) \
603 ((htab)->elf.srelplt->reloc_count * (htab)->got_entry_size)
605 #define is_x86_elf(bfd, htab) \
606 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
607 && elf_tdata (bfd) != NULL \
608 && elf_object_id (bfd) == (htab)->target_id)
610 extern bfd_boolean _bfd_x86_elf_mkobject
613 extern void _bfd_x86_elf_set_tls_module_base
614 (struct bfd_link_info *);
616 extern bfd_vma _bfd_x86_elf_dtpoff_base
617 (struct bfd_link_info *);
619 extern bfd_boolean _bfd_x86_elf_readonly_dynrelocs
620 (struct elf_link_hash_entry *, void *);
622 extern struct elf_link_hash_entry * _bfd_elf_x86_get_local_sym_hash
623 (struct elf_x86_link_hash_table *, bfd *, const Elf_Internal_Rela *,
626 extern hashval_t _bfd_x86_elf_local_htab_hash
629 extern int _bfd_x86_elf_local_htab_eq
630 (const void *, const void *);
632 extern struct bfd_hash_entry * _bfd_x86_elf_link_hash_newfunc
633 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
635 extern struct bfd_link_hash_table * _bfd_x86_elf_link_hash_table_create
638 extern int _bfd_x86_elf_compare_relocs
639 (const void *, const void *);
641 extern bfd_boolean _bfd_x86_elf_link_check_relocs
642 (bfd *, struct bfd_link_info *);
644 extern bfd_boolean _bfd_x86_elf_size_dynamic_sections
645 (bfd *, struct bfd_link_info *);
647 extern struct elf_x86_link_hash_table *_bfd_x86_elf_finish_dynamic_sections
648 (bfd *, struct bfd_link_info *);
650 extern bfd_boolean _bfd_x86_elf_always_size_sections
651 (bfd *, struct bfd_link_info *);
653 extern void _bfd_x86_elf_merge_symbol_attribute
654 (struct elf_link_hash_entry *, const Elf_Internal_Sym *,
655 bfd_boolean, bfd_boolean);
657 extern void _bfd_x86_elf_copy_indirect_symbol
658 (struct bfd_link_info *, struct elf_link_hash_entry *,
659 struct elf_link_hash_entry *);
661 extern bfd_boolean _bfd_x86_elf_fixup_symbol
662 (struct bfd_link_info *, struct elf_link_hash_entry *);
664 extern bfd_boolean _bfd_x86_elf_hash_symbol
665 (struct elf_link_hash_entry *);
667 extern bfd_boolean _bfd_x86_elf_adjust_dynamic_symbol
668 (struct bfd_link_info *, struct elf_link_hash_entry *);
670 extern void _bfd_x86_elf_hide_symbol
671 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
673 extern bfd_boolean _bfd_x86_elf_link_symbol_references_local
674 (struct bfd_link_info *, struct elf_link_hash_entry *);
676 extern asection * _bfd_x86_elf_gc_mark_hook
677 (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
678 struct elf_link_hash_entry *, Elf_Internal_Sym *);
680 extern long _bfd_x86_elf_get_synthetic_symtab
681 (bfd *, long, long, bfd_vma, struct elf_x86_plt [], asymbol **,
684 extern enum elf_property_kind _bfd_x86_elf_parse_gnu_properties
685 (bfd *, unsigned int, bfd_byte *, unsigned int);
687 extern bfd_boolean _bfd_x86_elf_merge_gnu_properties
688 (struct bfd_link_info *, bfd *, elf_property *, elf_property *);
690 extern void _bfd_x86_elf_link_fixup_gnu_properties
691 (struct bfd_link_info *, elf_property_list **);
693 extern bfd * _bfd_x86_elf_link_setup_gnu_properties
694 (struct bfd_link_info *, struct elf_x86_init_table *);
696 extern void _bfd_x86_elf_link_fixup_ifunc_symbol
697 (struct bfd_link_info *, struct elf_x86_link_hash_table *,
698 struct elf_link_hash_entry *, Elf_Internal_Sym *sym);
700 #define bfd_elf64_mkobject \
701 _bfd_x86_elf_mkobject
702 #define bfd_elf32_mkobject \
703 _bfd_x86_elf_mkobject
704 #define bfd_elf64_bfd_link_hash_table_create \
705 _bfd_x86_elf_link_hash_table_create
706 #define bfd_elf32_bfd_link_hash_table_create \
707 _bfd_x86_elf_link_hash_table_create
708 #define bfd_elf64_bfd_link_check_relocs \
709 _bfd_x86_elf_link_check_relocs
710 #define bfd_elf32_bfd_link_check_relocs \
711 _bfd_x86_elf_link_check_relocs
713 #define elf_backend_size_dynamic_sections \
714 _bfd_x86_elf_size_dynamic_sections
715 #define elf_backend_always_size_sections \
716 _bfd_x86_elf_always_size_sections
717 #define elf_backend_merge_symbol_attribute \
718 _bfd_x86_elf_merge_symbol_attribute
719 #define elf_backend_copy_indirect_symbol \
720 _bfd_x86_elf_copy_indirect_symbol
721 #define elf_backend_fixup_symbol \
722 _bfd_x86_elf_fixup_symbol
723 #define elf_backend_hash_symbol \
724 _bfd_x86_elf_hash_symbol
725 #define elf_backend_adjust_dynamic_symbol \
726 _bfd_x86_elf_adjust_dynamic_symbol
727 #define elf_backend_gc_mark_hook \
728 _bfd_x86_elf_gc_mark_hook
729 #define elf_backend_omit_section_dynsym \
730 _bfd_elf_omit_section_dynsym_all
731 #define elf_backend_parse_gnu_properties \
732 _bfd_x86_elf_parse_gnu_properties
733 #define elf_backend_merge_gnu_properties \
734 _bfd_x86_elf_merge_gnu_properties
735 #define elf_backend_fixup_gnu_properties \
736 _bfd_x86_elf_link_fixup_gnu_properties