1 /* x86 specific support for ELF
2 Copyright (C) 2017-2020 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. */
27 #include "elf-linker-x86.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. Don't generate dynamic relocations against
123 non-preemptible absolute symbol. */
124 #define GENERATE_DYNAMIC_RELOCATION_P(INFO, EH, R_TYPE, SEC, \
125 NEED_COPY_RELOC_IN_PIE, \
126 RESOLVED_TO_ZERO, PC32_RELOC) \
127 ((bfd_link_pic (INFO) \
128 && !(bfd_is_abs_section (SEC) \
130 || SYMBOL_REFERENCES_LOCAL (INFO, &(EH)->elf))) \
131 && !(NEED_COPY_RELOC_IN_PIE) \
133 || ((ELF_ST_VISIBILITY ((EH)->elf.other) == STV_DEFAULT \
134 && (!(RESOLVED_TO_ZERO) || PC32_RELOC)) \
135 || (EH)->elf.root.type != bfd_link_hash_undefweak)) \
136 && ((!X86_PCREL_TYPE_P (R_TYPE) && !X86_SIZE_TYPE_P (R_TYPE)) \
137 || ! SYMBOL_CALLS_LOCAL ((INFO), \
138 (struct elf_link_hash_entry *) (EH)))) \
139 || (ELIMINATE_COPY_RELOCS \
140 && !bfd_link_pic (INFO) \
142 && (EH)->elf.dynindx != -1 \
143 && (!(EH)->elf.non_got_ref \
144 || ((EH)->elf.root.type == bfd_link_hash_undefweak \
145 && !(RESOLVED_TO_ZERO))) \
146 && (((EH)->elf.def_dynamic && !(EH)->elf.def_regular) \
147 || (EH)->elf.root.type == bfd_link_hash_undefined)))
149 /* TRUE if this input relocation should be copied to output. H->dynindx
150 may be -1 if this symbol was marked to become local. */
151 #define COPY_INPUT_RELOC_P(INFO, H, R_TYPE) \
153 && (H)->dynindx != -1 \
154 && (X86_PCREL_TYPE_P (R_TYPE) \
155 || !(bfd_link_executable (INFO) || SYMBOLIC_BIND ((INFO), (H))) \
156 || !(H)->def_regular))
158 /* TRUE if this is actually a static link, or it is a -Bsymbolic link
159 and the symbol is defined locally, or the symbol was forced to be
160 local because of a version file. */
161 #define RESOLVED_LOCALLY_P(INFO, H, HTAB) \
162 (!WILL_CALL_FINISH_DYNAMIC_SYMBOL ((HTAB)->elf.dynamic_sections_created, \
163 bfd_link_pic (INFO), (H)) \
164 || (bfd_link_pic (INFO) \
165 && SYMBOL_REFERENCES_LOCAL_P ((INFO), (H))) \
166 || (ELF_ST_VISIBILITY ((H)->other) \
167 && (H)->root.type == bfd_link_hash_undefweak))
169 /* TRUE if this symbol isn't defined by a shared object. */
170 #define SYMBOL_DEFINED_NON_SHARED_P(H) \
172 || (H)->root.linker_def \
173 || (H)->root.ldscript_def \
174 || ((struct elf_x86_link_hash_entry *) (H))->linker_def \
175 || ELF_COMMON_DEF_P (H))
177 /* Return TRUE if the symbol described by a linker hash entry H is
178 going to be absolute. Similar to bfd_is_abs_symbol, but excluding
179 all linker-script defined symbols. */
180 #define ABS_SYMBOL_P(H) \
181 (bfd_is_abs_symbol (&(H)->root) && !(H)->root.ldscript_def)
183 /* TRUE if relative relocation should be generated. GOT reference to
184 global symbol in PIC will lead to dynamic symbol. It becomes a
185 problem when "time" or "times" is defined as a variable in an
186 executable, clashing with functions of the same name in libc. If a
187 symbol isn't undefined weak symbol, don't make it dynamic in PIC and
188 generate relative relocation. Don't generate relative relocation
189 against non-preemptible absolute symbol. */
190 #define GENERATE_RELATIVE_RELOC_P(INFO, H) \
191 ((H)->dynindx == -1 \
192 && !(H)->forced_local \
193 && (H)->root.type != bfd_link_hash_undefweak \
194 && bfd_link_pic (INFO) \
195 && !ABS_SYMBOL_P (H))
197 /* TRUE if this is a pointer reference to a local IFUNC. */
198 #define POINTER_LOCAL_IFUNC_P(INFO, H) \
199 ((H)->dynindx == -1 \
200 || (H)->forced_local \
201 || bfd_link_executable (INFO))
203 /* TRUE if this is a PLT reference to a local IFUNC. */
204 #define PLT_LOCAL_IFUNC_P(INFO, H) \
205 ((H)->dynindx == -1 \
206 || ((bfd_link_executable (INFO) \
207 || ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT) \
208 && (H)->def_regular \
209 && (H)->type == STT_GNU_IFUNC))
211 /* TRUE if TLS IE->LE transition is OK. */
212 #define TLS_TRANSITION_IE_TO_LE_P(INFO, H, TLS_TYPE) \
213 (bfd_link_executable (INFO) \
215 && (H)->dynindx == -1 \
216 && (TLS_TYPE & GOT_TLS_IE))
218 /* Verify that the symbol has an entry in the procedure linkage table. */
219 #define VERIFY_PLT_ENTRY(INFO, H, PLT, GOTPLT, RELPLT, LOCAL_UNDEFWEAK) \
222 if (((H)->dynindx == -1 \
223 && !LOCAL_UNDEFWEAK \
224 && !(((H)->forced_local || bfd_link_executable (INFO)) \
225 && (H)->def_regular \
226 && (H)->type == STT_GNU_IFUNC)) \
228 || (GOTPLT) == NULL \
229 || (RELPLT) == NULL) \
234 /* Verify that the symbol supports copy relocation. */
235 #define VERIFY_COPY_RELOC(H, HTAB) \
238 if ((H)->dynindx == -1 \
239 || ((H)->root.type != bfd_link_hash_defined \
240 && (H)->root.type != bfd_link_hash_defweak) \
241 || (HTAB)->elf.srelbss == NULL \
242 || (HTAB)->elf.sreldynrelro == NULL) \
247 /* x86 ELF linker hash entry. */
249 struct elf_x86_link_hash_entry
251 struct elf_link_hash_entry elf
;
253 unsigned char tls_type
;
255 /* Bit 0: Symbol has no GOT nor PLT relocations.
256 Bit 1: Symbol has non-GOT/non-PLT relocations in text sections.
257 zero_undefweak is initialized to 1 and undefined weak symbol
258 should be resolved to 0 if zero_undefweak > 0. */
259 unsigned int zero_undefweak
: 2;
261 /* Don't call finish_dynamic_symbol on this symbol. */
262 unsigned int no_finish_dynamic_symbol
: 1;
264 /* TRUE if symbol is __tls_get_addr. */
265 unsigned int tls_get_addr
: 1;
267 /* TRUE if symbol is defined as a protected symbol. */
268 unsigned int def_protected
: 1;
270 /* 0: Symbol references are unknown.
271 1: Symbol references aren't local.
272 2: Symbol references are local.
274 unsigned int local_ref
: 2;
276 /* TRUE if symbol is defined by linker. */
277 unsigned int linker_def
: 1;
279 /* TRUE if symbol is referenced by R_386_GOTOFF relocation. This is
280 only used by i386. */
281 unsigned int gotoff_ref
: 1;
283 /* TRUE if a weak symbol with a real definition needs a copy reloc.
284 When there is a weak symbol with a real definition, the processor
285 independent code will have arranged for us to see the real
286 definition first. We need to copy the needs_copy bit from the
287 real definition and check it when allowing copy reloc in PIE. This
288 is only used by x86-64. */
289 unsigned int needs_copy
: 1;
291 /* Information about the GOT PLT entry. Filled when there are both
292 GOT and PLT relocations against the same function. */
293 union gotplt_union plt_got
;
295 /* Information about the second PLT entry. */
296 union gotplt_union plt_second
;
298 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
299 starting at the end of the jump table. */
303 struct elf_x86_lazy_plt_layout
305 /* The first entry in a lazy procedure linkage table looks like this. */
306 const bfd_byte
*plt0_entry
;
307 unsigned int plt0_entry_size
; /* Size of PLT0 entry. */
309 /* Later entries in a lazy procedure linkage table look like this. */
310 const bfd_byte
*plt_entry
;
311 unsigned int plt_entry_size
; /* Size of each PLT entry. */
313 /* The TLSDESC entry in a lazy procedure linkage table looks like
314 this. This is for x86-64 only. */
315 const bfd_byte
*plt_tlsdesc_entry
;
316 unsigned int plt_tlsdesc_entry_size
; /* Size of TLSDESC entry. */
318 /* Offsets into the TLSDESC entry that are to be replaced with
319 GOT+8 and GOT+TDG. These are for x86-64 only. */
320 unsigned int plt_tlsdesc_got1_offset
;
321 unsigned int plt_tlsdesc_got2_offset
;
323 /* Offset of the end of the PC-relative instructions containing
324 plt_tlsdesc_got1_offset and plt_tlsdesc_got2_offset. These
325 are for x86-64 only. */
326 unsigned int plt_tlsdesc_got1_insn_end
;
327 unsigned int plt_tlsdesc_got2_insn_end
;
329 /* Offsets into plt0_entry that are to be replaced with GOT[1] and
331 unsigned int plt0_got1_offset
;
332 unsigned int plt0_got2_offset
;
334 /* Offset of the end of the PC-relative instruction containing
335 plt0_got2_offset. This is for x86-64 only. */
336 unsigned int plt0_got2_insn_end
;
338 /* Offsets into plt_entry that are to be replaced with... */
339 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
340 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
341 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
343 /* Length of the PC-relative instruction containing plt_got_offset.
344 This is used for x86-64 only. */
345 unsigned int plt_got_insn_size
;
347 /* Offset of the end of the PC-relative jump to plt0_entry. This is
348 used for x86-64 only. */
349 unsigned int plt_plt_insn_end
;
351 /* Offset into plt_entry where the initial value of the GOT entry
353 unsigned int plt_lazy_offset
;
355 /* The first entry in a PIC lazy procedure linkage table looks like
357 const bfd_byte
*pic_plt0_entry
;
359 /* Subsequent entries in a PIC lazy procedure linkage table look
361 const bfd_byte
*pic_plt_entry
;
363 /* .eh_frame covering the lazy .plt section. */
364 const bfd_byte
*eh_frame_plt
;
365 unsigned int eh_frame_plt_size
;
368 struct elf_x86_non_lazy_plt_layout
370 /* Entries in a non-lazy procedure linkage table look like this. */
371 const bfd_byte
*plt_entry
;
372 /* Entries in a PIC non-lazy procedure linkage table look like this.
373 This is only used for i386 where absolute PLT and PIC PLT are
375 const bfd_byte
*pic_plt_entry
;
377 unsigned int plt_entry_size
; /* Size of each PLT entry. */
379 /* Offsets into plt_entry that are to be replaced with... */
380 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
382 /* Length of the PC-relative instruction containing plt_got_offset.
383 This is used for x86-64 only. */
384 unsigned int plt_got_insn_size
;
386 /* .eh_frame covering the non-lazy .plt section. */
387 const bfd_byte
*eh_frame_plt
;
388 unsigned int eh_frame_plt_size
;
391 struct elf_x86_plt_layout
393 /* The first entry in a lazy procedure linkage table looks like this. */
394 const bfd_byte
*plt0_entry
;
395 /* Entries in a procedure linkage table look like this. */
396 const bfd_byte
*plt_entry
;
397 unsigned int plt_entry_size
; /* Size of each PLT entry. */
400 unsigned int has_plt0
;
402 /* Offsets into plt_entry that are to be replaced with... */
403 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
405 /* Length of the PC-relative instruction containing plt_got_offset.
406 This is only used for x86-64. */
407 unsigned int plt_got_insn_size
;
409 /* Alignment of the .iplt section. */
410 unsigned int iplt_alignment
;
412 /* .eh_frame covering the .plt section. */
413 const bfd_byte
*eh_frame_plt
;
414 unsigned int eh_frame_plt_size
;
417 /* Values in tls_type of x86 ELF linker hash entry. */
418 #define GOT_UNKNOWN 0
422 #define GOT_TLS_IE_POS 5
423 #define GOT_TLS_IE_NEG 6
424 #define GOT_TLS_IE_BOTH 7
425 #define GOT_TLS_GDESC 8
427 #define GOT_TLS_GD_BOTH_P(type) \
428 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
429 #define GOT_TLS_GD_P(type) \
430 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
431 #define GOT_TLS_GDESC_P(type) \
432 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
433 #define GOT_TLS_GD_ANY_P(type) \
434 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
436 #define elf_x86_hash_entry(ent) \
437 ((struct elf_x86_link_hash_entry *)(ent))
439 /* x86 ELF linker hash table. */
441 struct elf_x86_link_hash_table
443 struct elf_link_hash_table elf
;
445 /* Short-cuts to get to dynamic linker sections. */
447 asection
*plt_eh_frame
;
448 asection
*plt_second
;
449 asection
*plt_second_eh_frame
;
451 asection
*plt_got_eh_frame
;
453 /* Parameters describing PLT generation, lazy or non-lazy. */
454 struct elf_x86_plt_layout plt
;
456 /* Parameters describing lazy PLT generation. */
457 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
459 /* Parameters describing non-lazy PLT generation. */
460 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
464 bfd_signed_vma refcount
;
468 /* The amount of space used by the jump slots in the GOT. */
469 bfd_vma sgotplt_jump_table_size
;
471 /* _TLS_MODULE_BASE_ symbol. */
472 struct bfd_link_hash_entry
*tls_module_base
;
474 /* Used by local STT_GNU_IFUNC symbols. */
475 htab_t loc_hash_table
;
476 void * loc_hash_memory
;
478 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
479 bfd_vma next_jump_slot_index
;
480 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
481 bfd_vma next_irelative_index
;
483 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks.
484 This is used for i386 only. */
487 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. This
488 is only used for i386. */
489 bfd_vma next_tls_desc_index
;
491 /* Value used to fill the unused bytes of the first PLT entry. This
492 is only used for i386. */
493 bfd_byte plt0_pad_byte
;
495 /* TRUE if GOT is referenced. */
496 unsigned int got_referenced
: 1;
498 /* TRUE if PLT is PC-relative. PLT in PDE and PC-relative PLT in PIE
499 can be used as function address.
501 NB: i386 has non-PIC PLT and PIC PLT. Only non-PIC PLT in PDE can
502 be used as function address. PIC PLT in PIE can't be used as
504 unsigned int pcrel_plt
: 1;
506 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
507 bfd_vma (*r_sym
) (bfd_vma
);
508 bfd_boolean (*is_reloc_section
) (const char *);
509 unsigned int sizeof_reloc
;
510 unsigned int got_entry_size
;
511 unsigned int pointer_r_type
;
512 int dynamic_interpreter_size
;
513 const char *dynamic_interpreter
;
514 const char *tls_get_addr
;
516 /* Options passed from the linker. */
517 struct elf_linker_x86_params
*params
;
520 struct elf_x86_init_table
522 /* The lazy PLT layout. */
523 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
525 /* The non-lazy PLT layout. */
526 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
528 /* The lazy PLT layout for IBT. */
529 const struct elf_x86_lazy_plt_layout
*lazy_ibt_plt
;
531 /* The non-lazy PLT layout for IBT. */
532 const struct elf_x86_non_lazy_plt_layout
*non_lazy_ibt_plt
;
534 bfd_byte plt0_pad_byte
;
536 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
537 bfd_vma (*r_sym
) (bfd_vma
);
540 struct elf_x86_obj_tdata
542 struct elf_obj_tdata root
;
544 /* tls_type for each local got entry. */
545 char *local_got_tls_type
;
547 /* GOTPLT entries for TLS descriptors. */
548 bfd_vma
*local_tlsdesc_gotent
;
551 enum elf_x86_plt_type
565 enum elf_x86_plt_type type
;
566 unsigned int plt_got_offset
;
567 unsigned int plt_entry_size
;
568 unsigned int plt_got_insn_size
; /* Only used for x86-64. */
572 /* Set if a relocation is converted from a GOTPCREL relocation. */
573 #define R_X86_64_converted_reloc_bit (1 << 7)
575 #define elf_x86_tdata(abfd) \
576 ((struct elf_x86_obj_tdata *) (abfd)->tdata.any)
578 #define elf_x86_local_got_tls_type(abfd) \
579 (elf_x86_tdata (abfd)->local_got_tls_type)
581 #define elf_x86_local_tlsdesc_gotent(abfd) \
582 (elf_x86_tdata (abfd)->local_tlsdesc_gotent)
584 #define elf_x86_compute_jump_table_size(htab) \
585 ((htab)->elf.srelplt->reloc_count * (htab)->got_entry_size)
587 #define is_x86_elf(bfd, htab) \
588 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
589 && elf_tdata (bfd) != NULL \
590 && elf_object_id (bfd) == (htab)->elf.hash_table_id)
592 extern bfd_boolean _bfd_x86_elf_mkobject
595 extern void _bfd_x86_elf_set_tls_module_base
596 (struct bfd_link_info
*);
598 extern bfd_vma _bfd_x86_elf_dtpoff_base
599 (struct bfd_link_info
*);
601 extern bfd_boolean _bfd_x86_elf_readonly_dynrelocs
602 (struct elf_link_hash_entry
*, void *);
604 extern struct elf_link_hash_entry
* _bfd_elf_x86_get_local_sym_hash
605 (struct elf_x86_link_hash_table
*, bfd
*, const Elf_Internal_Rela
*,
608 extern hashval_t _bfd_x86_elf_local_htab_hash
611 extern int _bfd_x86_elf_local_htab_eq
612 (const void *, const void *);
614 extern struct bfd_hash_entry
* _bfd_x86_elf_link_hash_newfunc
615 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
617 extern struct bfd_link_hash_table
* _bfd_x86_elf_link_hash_table_create
620 extern int _bfd_x86_elf_compare_relocs
621 (const void *, const void *);
623 extern bfd_boolean _bfd_x86_elf_link_check_relocs
624 (bfd
*, struct bfd_link_info
*);
626 extern bfd_boolean _bfd_elf_x86_valid_reloc_p
627 (asection
*, struct bfd_link_info
*, struct elf_x86_link_hash_table
*,
628 const Elf_Internal_Rela
*, struct elf_link_hash_entry
*,
629 Elf_Internal_Sym
*, Elf_Internal_Shdr
*, bfd_boolean
*);
631 extern bfd_boolean _bfd_x86_elf_size_dynamic_sections
632 (bfd
*, struct bfd_link_info
*);
634 extern struct elf_x86_link_hash_table
*_bfd_x86_elf_finish_dynamic_sections
635 (bfd
*, struct bfd_link_info
*);
637 extern bfd_boolean _bfd_x86_elf_always_size_sections
638 (bfd
*, struct bfd_link_info
*);
640 extern void _bfd_x86_elf_merge_symbol_attribute
641 (struct elf_link_hash_entry
*, const Elf_Internal_Sym
*,
642 bfd_boolean
, bfd_boolean
);
644 extern void _bfd_x86_elf_copy_indirect_symbol
645 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
646 struct elf_link_hash_entry
*);
648 extern bfd_boolean _bfd_x86_elf_fixup_symbol
649 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
651 extern bfd_boolean _bfd_x86_elf_hash_symbol
652 (struct elf_link_hash_entry
*);
654 extern bfd_boolean _bfd_x86_elf_adjust_dynamic_symbol
655 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
657 extern void _bfd_x86_elf_hide_symbol
658 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
660 extern bfd_boolean _bfd_x86_elf_link_symbol_references_local
661 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
663 extern asection
* _bfd_x86_elf_gc_mark_hook
664 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
665 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
667 extern long _bfd_x86_elf_get_synthetic_symtab
668 (bfd
*, long, long, bfd_vma
, struct elf_x86_plt
[], asymbol
**,
671 extern enum elf_property_kind _bfd_x86_elf_parse_gnu_properties
672 (bfd
*, unsigned int, bfd_byte
*, unsigned int);
674 extern bfd_boolean _bfd_x86_elf_merge_gnu_properties
675 (struct bfd_link_info
*, bfd
*, bfd
*, elf_property
*, elf_property
*);
677 extern void _bfd_x86_elf_link_fixup_gnu_properties
678 (struct bfd_link_info
*, elf_property_list
**);
680 extern bfd
* _bfd_x86_elf_link_setup_gnu_properties
681 (struct bfd_link_info
*, struct elf_x86_init_table
*);
683 extern void _bfd_x86_elf_link_fixup_ifunc_symbol
684 (struct bfd_link_info
*, struct elf_x86_link_hash_table
*,
685 struct elf_link_hash_entry
*, Elf_Internal_Sym
*sym
);
687 #define bfd_elf64_mkobject \
688 _bfd_x86_elf_mkobject
689 #define bfd_elf32_mkobject \
690 _bfd_x86_elf_mkobject
691 #define bfd_elf64_bfd_link_hash_table_create \
692 _bfd_x86_elf_link_hash_table_create
693 #define bfd_elf32_bfd_link_hash_table_create \
694 _bfd_x86_elf_link_hash_table_create
695 #define bfd_elf64_bfd_link_check_relocs \
696 _bfd_x86_elf_link_check_relocs
697 #define bfd_elf32_bfd_link_check_relocs \
698 _bfd_x86_elf_link_check_relocs
700 #define elf_backend_size_dynamic_sections \
701 _bfd_x86_elf_size_dynamic_sections
702 #define elf_backend_always_size_sections \
703 _bfd_x86_elf_always_size_sections
704 #define elf_backend_merge_symbol_attribute \
705 _bfd_x86_elf_merge_symbol_attribute
706 #define elf_backend_copy_indirect_symbol \
707 _bfd_x86_elf_copy_indirect_symbol
708 #define elf_backend_fixup_symbol \
709 _bfd_x86_elf_fixup_symbol
710 #define elf_backend_hash_symbol \
711 _bfd_x86_elf_hash_symbol
712 #define elf_backend_adjust_dynamic_symbol \
713 _bfd_x86_elf_adjust_dynamic_symbol
714 #define elf_backend_gc_mark_hook \
715 _bfd_x86_elf_gc_mark_hook
716 #define elf_backend_omit_section_dynsym \
717 _bfd_elf_omit_section_dynsym_all
718 #define elf_backend_parse_gnu_properties \
719 _bfd_x86_elf_parse_gnu_properties
720 #define elf_backend_merge_gnu_properties \
721 _bfd_x86_elf_merge_gnu_properties
722 #define elf_backend_fixup_gnu_properties \
723 _bfd_x86_elf_link_fixup_gnu_properties