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0afcef53 | 1 | /* x86 specific support for ELF |
d87bef3a | 2 | Copyright (C) 2017-2023 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 | ||
d1bcae83 | 21 | /* Don't generate unused section symbols. */ |
0a1b45a2 | 22 | #define TARGET_KEEP_UNUSED_SECTION_SYMBOLS false |
d1bcae83 | 23 | |
0afcef53 L |
24 | #include "sysdep.h" |
25 | #include "bfd.h" | |
26 | #include "bfdlink.h" | |
27 | #include "libbfd.h" | |
28 | #include "elf-bfd.h" | |
0afcef53 | 29 | #include "hashtab.h" |
5b9c07b2 | 30 | #include "elf-linker-x86.h" |
831083d3 L |
31 | #include "elf/i386.h" |
32 | #include "elf/x86-64.h" | |
cf0e0a0b | 33 | #include "sframe-api.h" |
831083d3 L |
34 | |
35 | #define X86_64_PCREL_TYPE_P(TYPE) \ | |
36 | ((TYPE) == R_X86_64_PC8 \ | |
37 | || (TYPE) == R_X86_64_PC16 \ | |
38 | || (TYPE) == R_X86_64_PC32 \ | |
831083d3 L |
39 | || (TYPE) == R_X86_64_PC64) |
40 | #define I386_PCREL_TYPE_P(TYPE) ((TYPE) == R_386_PC32) | |
41 | #define X86_PCREL_TYPE_P(IS_X86_64, TYPE) \ | |
42 | ((IS_X86_64) ? X86_64_PCREL_TYPE_P (TYPE) : I386_PCREL_TYPE_P (TYPE)) | |
43 | ||
44 | #define X86_64_SIZE_TYPE_P(TYPE) \ | |
45 | ((TYPE) == R_X86_64_SIZE32 || (TYPE) == R_X86_64_SIZE64) | |
46 | #define I386_SIZE_TYPE_P(TYPE) ((TYPE) == R_386_SIZE32) | |
47 | #define X86_SIZE_TYPE_P(IS_X86_64, TYPE) \ | |
48 | ((IS_X86_64) ? X86_64_SIZE_TYPE_P(TYPE) : I386_SIZE_TYPE_P (TYPE)) | |
0afcef53 | 49 | |
5af6f000 L |
50 | #define X86_64_GOT_TYPE_P(TYPE) \ |
51 | ((TYPE) == R_X86_64_GOTPCREL \ | |
52 | || (TYPE) == R_X86_64_GOTPCRELX \ | |
8d26ee1c L |
53 | || (TYPE) == R_X86_64_REX_GOTPCRELX \ |
54 | || (TYPE) == R_X86_64_GOT32 \ | |
55 | || (TYPE) == R_X86_64_GOT64 \ | |
56 | || (TYPE) == R_X86_64_GOTPCREL64 \ | |
57 | || (TYPE) == R_X86_64_GOTPLT64) | |
5af6f000 L |
58 | #define I386_GOT_TYPE_P(TYPE) \ |
59 | ((TYPE) == R_386_GOT32 || (TYPE) == R_386_GOT32X) | |
60 | #define X86_GOT_TYPE_P(IS_X86_64, TYPE) \ | |
61 | ((IS_X86_64) ? X86_64_GOT_TYPE_P (TYPE) : I386_GOT_TYPE_P (TYPE)) | |
62 | ||
63 | #define X86_64_RELATIVE_RELOC_TYPE_P(TYPE) \ | |
64 | (X86_64_PCREL_TYPE_P (TYPE) \ | |
3747999c L |
65 | || (TYPE) == R_X86_64_8 \ |
66 | || (TYPE) == R_X86_64_16 \ | |
67 | || (TYPE) == R_X86_64_32 \ | |
68 | || (TYPE) == R_X86_64_32S \ | |
69 | || (TYPE) == R_X86_64_64) | |
5af6f000 L |
70 | #define I386_RELATIVE_RELOC_TYPE_P(TYPE) \ |
71 | ((TYPE) == R_386_32 || (TYPE) == R_386_PC32) | |
72 | #define X86_RELATIVE_RELOC_TYPE_P(IS_X86_64, TYPE) \ | |
73 | ((IS_X86_64) \ | |
74 | ? X86_64_RELATIVE_RELOC_TYPE_P (TYPE) \ | |
75 | : I386_RELATIVE_RELOC_TYPE_P(TYPE)) | |
76 | ||
77 | #define X86_64_NEED_DYNAMIC_RELOC_TYPE_P(TYPE) \ | |
78 | (X86_64_SIZE_TYPE_P (TYPE) \ | |
79 | || X86_64_RELATIVE_RELOC_TYPE_P (TYPE)) | |
3747999c L |
80 | #define I386_NEED_DYNAMIC_RELOC_TYPE_P(TYPE) \ |
81 | (I386_SIZE_TYPE_P (TYPE) \ | |
5af6f000 | 82 | || I386_RELATIVE_RELOC_TYPE_P (TYPE) \ |
3319ba7a | 83 | || (TYPE) == R_386_TLS_IE \ |
3747999c L |
84 | || (TYPE) == R_386_TLS_LE \ |
85 | || (TYPE) == R_386_TLS_LE_32) | |
86 | #define X86_NEED_DYNAMIC_RELOC_TYPE_P(IS_X86_64, TYPE) \ | |
87 | ((IS_X86_64) \ | |
88 | ? X86_64_NEED_DYNAMIC_RELOC_TYPE_P (TYPE) \ | |
89 | : I386_NEED_DYNAMIC_RELOC_TYPE_P (TYPE)) | |
90 | ||
5af6f000 L |
91 | #define X86_LOCAL_GOT_RELATIVE_RELOC_P(IS_X86_64, INFO, SYM) \ |
92 | (bfd_link_pic (INFO) \ | |
93 | && (!(IS_X86_64) || ((SYM) != NULL && (SYM)->st_shndx != SHN_ABS))) | |
94 | ||
aa595247 L |
95 | #define PLT_CIE_LENGTH 20 |
96 | #define PLT_FDE_LENGTH 36 | |
97 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
98 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
99 | ||
5af6f000 L |
100 | #define I386_PCREL_TYPE_P(TYPE) ((TYPE) == R_386_PC32) |
101 | #define X86_64_PCREL_TYPE_P(TYPE) \ | |
102 | ((TYPE) == R_X86_64_PC8 \ | |
103 | || (TYPE) == R_X86_64_PC16 \ | |
104 | || (TYPE) == R_X86_64_PC32 \ | |
5af6f000 L |
105 | || (TYPE) == R_X86_64_PC64) |
106 | ||
cf0e0a0b IB |
107 | /* This must be the same as sframe_get_hdr_size (sfh). For x86-64, this value |
108 | is the same as sizeof (sframe_header) because there is no SFrame auxilliary | |
109 | header. */ | |
110 | #define PLT_SFRAME_FDE_START_OFFSET sizeof (sframe_header) | |
111 | ||
765e526c L |
112 | #define ABI_64_P(abfd) \ |
113 | (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64) | |
114 | ||
0afcef53 L |
115 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
116 | copying dynamic variables from a shared lib into an app's dynbss | |
117 | section, and instead use a dynamic relocation to point into the | |
118 | shared lib. */ | |
119 | #define ELIMINATE_COPY_RELOCS 1 | |
120 | ||
121 | #define elf_x86_hash_table(p, id) \ | |
1cf58434 AM |
122 | (is_elf_hash_table ((p)->hash) \ |
123 | && elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) == (id) \ | |
0afcef53 L |
124 | ? ((struct elf_x86_link_hash_table *) ((p)->hash)) : NULL) |
125 | ||
6999821f L |
126 | /* Will references to this symbol always be local in this object? */ |
127 | #define SYMBOL_REFERENCES_LOCAL_P(INFO, H) \ | |
128 | _bfd_x86_elf_link_symbol_references_local ((INFO), (H)) | |
129 | ||
99180bcc L |
130 | /* TRUE if an undefined weak symbol should be resolved to 0. Local |
131 | undefined weak symbol is always resolved to 0. Reference to an | |
132 | undefined weak symbol is resolved to 0 in executable if undefined | |
133 | weak symbol should be resolved to 0 (zero_undefweak > 0). */ | |
c5bce5c6 | 134 | #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, EH) \ |
0afcef53 | 135 | ((EH)->elf.root.type == bfd_link_hash_undefweak \ |
6999821f | 136 | && (SYMBOL_REFERENCES_LOCAL_P ((INFO), &(EH)->elf) \ |
0afcef53 | 137 | || (bfd_link_executable (INFO) \ |
98b273dc | 138 | && (EH)->zero_undefweak > 0))) |
0afcef53 L |
139 | |
140 | /* Should copy relocation be generated for a symbol. Don't generate | |
141 | copy relocation against a protected symbol defined in a shared | |
f6386577 | 142 | object. */ |
0afcef53 L |
143 | #define SYMBOL_NO_COPYRELOC(INFO, EH) \ |
144 | ((EH)->def_protected \ | |
145 | && ((EH)->elf.root.type == bfd_link_hash_defined \ | |
146 | || (EH)->elf.root.type == bfd_link_hash_defweak) \ | |
0afcef53 L |
147 | && ((EH)->elf.root.u.def.section->owner->flags & DYNAMIC) != 0 \ |
148 | && ((EH)->elf.root.u.def.section->flags & SEC_CODE) == 0) | |
149 | ||
daf1c414 L |
150 | /* TRUE if dynamic relocation is needed. If we are creating a shared |
151 | library, and this is a reloc against a global symbol, or a non PC | |
152 | relative reloc against a local symbol, then we need to copy the reloc | |
153 | into the shared library. However, if we are linking with -Bsymbolic, | |
154 | we do not need to copy a reloc against a global symbol which is | |
155 | defined in an object we are including in the link (i.e., DEF_REGULAR | |
451875b4 L |
156 | is set). |
157 | ||
158 | If PCREL_PLT is true, don't generate dynamic relocation in PIE for | |
159 | PC-relative relocation against a dynamic function definition in data | |
160 | section when PLT address can be used. | |
daf1c414 L |
161 | |
162 | If on the other hand, we are creating an executable, we may need to | |
163 | keep relocations for symbols satisfied by a dynamic library if we | |
164 | manage to avoid copy relocs for the symbol. | |
165 | ||
166 | We also need to generate dynamic pointer relocation against | |
167 | STT_GNU_IFUNC symbol in the non-code section. */ | |
831083d3 L |
168 | #define NEED_DYNAMIC_RELOCATION_P(IS_X86_64, INFO, PCREL_PLT, H, SEC, \ |
169 | R_TYPE, POINTER_TYPE) \ | |
daf1c414 | 170 | ((bfd_link_pic (INFO) \ |
831083d3 | 171 | && (! X86_PCREL_TYPE_P (IS_X86_64, R_TYPE) \ |
daf1c414 L |
172 | || ((H) != NULL \ |
173 | && (! (bfd_link_pie (INFO) \ | |
174 | || SYMBOLIC_BIND ((INFO), (H))) \ | |
175 | || (H)->root.type == bfd_link_hash_defweak \ | |
451875b4 L |
176 | || (!(bfd_link_pie (INFO) \ |
177 | && (PCREL_PLT) \ | |
178 | && (H)->plt.refcount > 0 \ | |
179 | && ((SEC)->flags & SEC_CODE) == 0 \ | |
180 | && (H)->type == STT_FUNC \ | |
181 | && (H)->def_dynamic) \ | |
182 | && !(H)->def_regular))))) \ | |
183 | || ((H) != NULL \ | |
184 | && (H)->type == STT_GNU_IFUNC \ | |
185 | && (R_TYPE) == POINTER_TYPE \ | |
186 | && ((SEC)->flags & SEC_CODE) == 0) \ | |
187 | || (ELIMINATE_COPY_RELOCS \ | |
188 | && !bfd_link_pic (INFO) \ | |
189 | && (H) != NULL \ | |
190 | && ((H)->root.type == bfd_link_hash_defweak \ | |
191 | || !(H)->def_regular))) | |
daf1c414 | 192 | |
aebcc8ff L |
193 | /* TRUE if dynamic relocation should be generated. Don't copy a |
194 | pc-relative relocation into the output file if the symbol needs | |
195 | copy reloc or the symbol is undefined when building executable. | |
196 | Copy dynamic function pointer relocations. Don't generate dynamic | |
197 | relocations against resolved undefined weak symbols in PIE, except | |
198 | when PC32_RELOC is TRUE. Undefined weak symbol is bound locally | |
382aae06 | 199 | when PIC is false. Don't generate dynamic relocations against |
5af6f000 L |
200 | non-preemptible absolute symbol. NB: rel_from_abs is set on symbols |
201 | defined by linker scripts from "dot" (also SEGMENT_START or ORIGIN) | |
202 | outside of an output section statement, which will be converted from | |
203 | absolute to section-relative in set_sym_sections called from | |
204 | ldexp_finalize_syms after ldemul_finish. */ | |
831083d3 L |
205 | #define GENERATE_DYNAMIC_RELOCATION_P(IS_X86_64, INFO, EH, R_TYPE, \ |
206 | SEC, NEED_COPY_RELOC_IN_PIE, \ | |
aebcc8ff L |
207 | RESOLVED_TO_ZERO, PC32_RELOC) \ |
208 | ((bfd_link_pic (INFO) \ | |
382aae06 | 209 | && !(bfd_is_abs_section (SEC) \ |
5af6f000 L |
210 | && ((EH) == NULL \ |
211 | || (EH)->elf.root.rel_from_abs == 0) \ | |
382aae06 L |
212 | && ((EH) == NULL \ |
213 | || SYMBOL_REFERENCES_LOCAL (INFO, &(EH)->elf))) \ | |
aebcc8ff L |
214 | && !(NEED_COPY_RELOC_IN_PIE) \ |
215 | && ((EH) == NULL \ | |
216 | || ((ELF_ST_VISIBILITY ((EH)->elf.other) == STV_DEFAULT \ | |
217 | && (!(RESOLVED_TO_ZERO) || PC32_RELOC)) \ | |
218 | || (EH)->elf.root.type != bfd_link_hash_undefweak)) \ | |
831083d3 L |
219 | && ((!X86_PCREL_TYPE_P (IS_X86_64, R_TYPE) \ |
220 | && !X86_SIZE_TYPE_P (IS_X86_64, R_TYPE)) \ | |
433953ff L |
221 | || ! SYMBOL_CALLS_LOCAL ((INFO), \ |
222 | (struct elf_link_hash_entry *) (EH)))) \ | |
aebcc8ff L |
223 | || (ELIMINATE_COPY_RELOCS \ |
224 | && !bfd_link_pic (INFO) \ | |
225 | && (EH) != NULL \ | |
226 | && (EH)->elf.dynindx != -1 \ | |
227 | && (!(EH)->elf.non_got_ref \ | |
aebcc8ff L |
228 | || ((EH)->elf.root.type == bfd_link_hash_undefweak \ |
229 | && !(RESOLVED_TO_ZERO))) \ | |
230 | && (((EH)->elf.def_dynamic && !(EH)->elf.def_regular) \ | |
231 | || (EH)->elf.root.type == bfd_link_hash_undefined))) | |
232 | ||
e74399c4 L |
233 | /* TRUE if this input relocation should be copied to output. H->dynindx |
234 | may be -1 if this symbol was marked to become local. */ | |
831083d3 | 235 | #define COPY_INPUT_RELOC_P(IS_X86_64, INFO, H, R_TYPE) \ |
e74399c4 L |
236 | ((H) != NULL \ |
237 | && (H)->dynindx != -1 \ | |
831083d3 | 238 | && (X86_PCREL_TYPE_P (IS_X86_64, R_TYPE) \ |
e74399c4 L |
239 | || !(bfd_link_executable (INFO) || SYMBOLIC_BIND ((INFO), (H))) \ |
240 | || !(H)->def_regular)) | |
241 | ||
2eba97c2 L |
242 | /* TRUE if this is actually a static link, or it is a -Bsymbolic link |
243 | and the symbol is defined locally, or the symbol was forced to be | |
244 | local because of a version file. */ | |
245 | #define RESOLVED_LOCALLY_P(INFO, H, HTAB) \ | |
246 | (!WILL_CALL_FINISH_DYNAMIC_SYMBOL ((HTAB)->elf.dynamic_sections_created, \ | |
247 | bfd_link_pic (INFO), (H)) \ | |
248 | || (bfd_link_pic (INFO) \ | |
249 | && SYMBOL_REFERENCES_LOCAL_P ((INFO), (H))) \ | |
250 | || (ELF_ST_VISIBILITY ((H)->other) \ | |
251 | && (H)->root.type == bfd_link_hash_undefweak)) | |
252 | ||
83924b38 L |
253 | /* TRUE if this symbol isn't defined by a shared object. */ |
254 | #define SYMBOL_DEFINED_NON_SHARED_P(H) \ | |
255 | ((H)->def_regular \ | |
256 | || (H)->root.linker_def \ | |
257 | || (H)->root.ldscript_def \ | |
4e84a8f8 | 258 | || ((struct elf_x86_link_hash_entry *) (H))->linker_def \ |
83924b38 L |
259 | || ELF_COMMON_DEF_P (H)) |
260 | ||
382aae06 L |
261 | /* Return TRUE if the symbol described by a linker hash entry H is |
262 | going to be absolute. Similar to bfd_is_abs_symbol, but excluding | |
263 | all linker-script defined symbols. */ | |
264 | #define ABS_SYMBOL_P(H) \ | |
265 | (bfd_is_abs_symbol (&(H)->root) && !(H)->root.ldscript_def) | |
266 | ||
f70656b2 L |
267 | /* TRUE if relative relocation should be generated. GOT reference to |
268 | global symbol in PIC will lead to dynamic symbol. It becomes a | |
269 | problem when "time" or "times" is defined as a variable in an | |
270 | executable, clashing with functions of the same name in libc. If a | |
271 | symbol isn't undefined weak symbol, don't make it dynamic in PIC and | |
382aae06 L |
272 | generate relative relocation. Don't generate relative relocation |
273 | against non-preemptible absolute symbol. */ | |
f70656b2 L |
274 | #define GENERATE_RELATIVE_RELOC_P(INFO, H) \ |
275 | ((H)->dynindx == -1 \ | |
276 | && !(H)->forced_local \ | |
277 | && (H)->root.type != bfd_link_hash_undefweak \ | |
382aae06 L |
278 | && bfd_link_pic (INFO) \ |
279 | && !ABS_SYMBOL_P (H)) | |
f70656b2 | 280 | |
cf1070f1 L |
281 | /* TRUE if this is a pointer reference to a local IFUNC. */ |
282 | #define POINTER_LOCAL_IFUNC_P(INFO, H) \ | |
283 | ((H)->dynindx == -1 \ | |
284 | || (H)->forced_local \ | |
285 | || bfd_link_executable (INFO)) | |
286 | ||
287 | /* TRUE if this is a PLT reference to a local IFUNC. */ | |
288 | #define PLT_LOCAL_IFUNC_P(INFO, H) \ | |
289 | ((H)->dynindx == -1 \ | |
290 | || ((bfd_link_executable (INFO) \ | |
291 | || ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT) \ | |
292 | && (H)->def_regular \ | |
293 | && (H)->type == STT_GNU_IFUNC)) | |
294 | ||
51537393 L |
295 | /* TRUE if TLS IE->LE transition is OK. */ |
296 | #define TLS_TRANSITION_IE_TO_LE_P(INFO, H, TLS_TYPE) \ | |
297 | (bfd_link_executable (INFO) \ | |
298 | && (H) != NULL \ | |
299 | && (H)->dynindx == -1 \ | |
300 | && (TLS_TYPE & GOT_TLS_IE)) | |
301 | ||
f3180fa9 L |
302 | /* Verify that the symbol has an entry in the procedure linkage table. */ |
303 | #define VERIFY_PLT_ENTRY(INFO, H, PLT, GOTPLT, RELPLT, LOCAL_UNDEFWEAK) \ | |
e0d8f431 L |
304 | do \ |
305 | { \ | |
306 | if (((H)->dynindx == -1 \ | |
307 | && !LOCAL_UNDEFWEAK \ | |
308 | && !(((H)->forced_local || bfd_link_executable (INFO)) \ | |
309 | && (H)->def_regular \ | |
310 | && (H)->type == STT_GNU_IFUNC)) \ | |
311 | || (PLT) == NULL \ | |
312 | || (GOTPLT) == NULL \ | |
313 | || (RELPLT) == NULL) \ | |
314 | abort (); \ | |
315 | } \ | |
316 | while (0); | |
f3180fa9 | 317 | |
ff38b4cc L |
318 | /* Verify that the symbol supports copy relocation. */ |
319 | #define VERIFY_COPY_RELOC(H, HTAB) \ | |
e0d8f431 L |
320 | do \ |
321 | { \ | |
322 | if ((H)->dynindx == -1 \ | |
323 | || ((H)->root.type != bfd_link_hash_defined \ | |
324 | && (H)->root.type != bfd_link_hash_defweak) \ | |
325 | || (HTAB)->elf.srelbss == NULL \ | |
326 | || (HTAB)->elf.sreldynrelro == NULL) \ | |
327 | abort (); \ | |
328 | } \ | |
329 | while (0); | |
ff38b4cc | 330 | |
0afcef53 L |
331 | /* x86 ELF linker hash entry. */ |
332 | ||
333 | struct elf_x86_link_hash_entry | |
334 | { | |
335 | struct elf_link_hash_entry elf; | |
336 | ||
0afcef53 L |
337 | unsigned char tls_type; |
338 | ||
98b273dc L |
339 | /* Bit 0: Symbol has no GOT nor PLT relocations. |
340 | Bit 1: Symbol has non-GOT/non-PLT relocations in text sections. | |
341 | zero_undefweak is initialized to 1 and undefined weak symbol | |
342 | should be resolved to 0 if zero_undefweak > 0. */ | |
343 | unsigned int zero_undefweak : 2; | |
0afcef53 L |
344 | |
345 | /* Don't call finish_dynamic_symbol on this symbol. */ | |
346 | unsigned int no_finish_dynamic_symbol : 1; | |
347 | ||
5af6f000 L |
348 | /* R_*_RELATIVE relocation in GOT for this symbol has been |
349 | processed. */ | |
350 | unsigned int got_relative_reloc_done : 1; | |
351 | ||
0afcef53 L |
352 | /* TRUE if symbol is __tls_get_addr. */ |
353 | unsigned int tls_get_addr : 1; | |
354 | ||
355 | /* TRUE if symbol is defined as a protected symbol. */ | |
356 | unsigned int def_protected : 1; | |
357 | ||
6999821f L |
358 | /* 0: Symbol references are unknown. |
359 | 1: Symbol references aren't local. | |
360 | 2: Symbol references are local. | |
361 | */ | |
362 | unsigned int local_ref : 2; | |
363 | ||
0a27fed7 L |
364 | /* TRUE if symbol is defined by linker. */ |
365 | unsigned int linker_def : 1; | |
366 | ||
6f365fda L |
367 | /* TRUE if symbol is referenced by a non-GOT/non-PLT relocation in a |
368 | relocatable object file without indirect external access marker. */ | |
369 | unsigned int non_got_ref_without_indirect_extern_access : 1; | |
370 | ||
f47432d4 | 371 | /* TRUE if symbol is referenced by R_386_GOTOFF relocation. This is |
c7df954f | 372 | only used by i386. */ |
0afcef53 L |
373 | unsigned int gotoff_ref : 1; |
374 | ||
375 | /* TRUE if a weak symbol with a real definition needs a copy reloc. | |
376 | When there is a weak symbol with a real definition, the processor | |
377 | independent code will have arranged for us to see the real | |
378 | definition first. We need to copy the needs_copy bit from the | |
379 | real definition and check it when allowing copy reloc in PIE. This | |
380 | is only used by x86-64. */ | |
381 | unsigned int needs_copy : 1; | |
382 | ||
0afcef53 L |
383 | /* Information about the GOT PLT entry. Filled when there are both |
384 | GOT and PLT relocations against the same function. */ | |
385 | union gotplt_union plt_got; | |
386 | ||
387 | /* Information about the second PLT entry. */ | |
388 | union gotplt_union plt_second; | |
389 | ||
390 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, | |
391 | starting at the end of the jump table. */ | |
392 | bfd_vma tlsdesc_got; | |
393 | }; | |
394 | ||
cf0e0a0b IB |
395 | #define SFRAME_PLT0_MAX_NUM_FRES 2 |
396 | #define SFRAME_PLTN_MAX_NUM_FRES 2 | |
397 | ||
398 | struct elf_x86_sframe_plt | |
399 | { | |
400 | unsigned int plt0_entry_size; | |
401 | unsigned int plt0_num_fres; | |
402 | const sframe_frame_row_entry *plt0_fres[SFRAME_PLT0_MAX_NUM_FRES]; | |
403 | ||
404 | unsigned int pltn_entry_size; | |
405 | unsigned int pltn_num_fres; | |
406 | const sframe_frame_row_entry *pltn_fres[SFRAME_PLTN_MAX_NUM_FRES]; | |
407 | ||
408 | unsigned int sec_pltn_entry_size; | |
409 | unsigned int sec_pltn_num_fres; | |
410 | const sframe_frame_row_entry *sec_pltn_fres[SFRAME_PLTN_MAX_NUM_FRES]; | |
411 | }; | |
412 | ||
765e526c L |
413 | struct elf_x86_lazy_plt_layout |
414 | { | |
92e68c1d | 415 | /* The first entry in a lazy procedure linkage table looks like this. */ |
765e526c | 416 | const bfd_byte *plt0_entry; |
07d6d2b8 | 417 | unsigned int plt0_entry_size; /* Size of PLT0 entry. */ |
765e526c | 418 | |
92e68c1d | 419 | /* Later entries in a lazy procedure linkage table look like this. */ |
765e526c | 420 | const bfd_byte *plt_entry; |
07d6d2b8 | 421 | unsigned int plt_entry_size; /* Size of each PLT entry. */ |
765e526c | 422 | |
92e68c1d L |
423 | /* The TLSDESC entry in a lazy procedure linkage table looks like |
424 | this. This is for x86-64 only. */ | |
425 | const bfd_byte *plt_tlsdesc_entry; | |
426 | unsigned int plt_tlsdesc_entry_size; /* Size of TLSDESC entry. */ | |
427 | ||
428 | /* Offsets into the TLSDESC entry that are to be replaced with | |
429 | GOT+8 and GOT+TDG. These are for x86-64 only. */ | |
430 | unsigned int plt_tlsdesc_got1_offset; | |
431 | unsigned int plt_tlsdesc_got2_offset; | |
432 | ||
433 | /* Offset of the end of the PC-relative instructions containing | |
434 | plt_tlsdesc_got1_offset and plt_tlsdesc_got2_offset. These | |
435 | are for x86-64 only. */ | |
436 | unsigned int plt_tlsdesc_got1_insn_end; | |
437 | unsigned int plt_tlsdesc_got2_insn_end; | |
438 | ||
765e526c L |
439 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and |
440 | GOT[2]. */ | |
441 | unsigned int plt0_got1_offset; | |
442 | unsigned int plt0_got2_offset; | |
443 | ||
444 | /* Offset of the end of the PC-relative instruction containing | |
445 | plt0_got2_offset. This is for x86-64 only. */ | |
446 | unsigned int plt0_got2_insn_end; | |
447 | ||
448 | /* Offsets into plt_entry that are to be replaced with... */ | |
449 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
450 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
451 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
452 | ||
453 | /* Length of the PC-relative instruction containing plt_got_offset. | |
454 | This is used for x86-64 only. */ | |
455 | unsigned int plt_got_insn_size; | |
456 | ||
457 | /* Offset of the end of the PC-relative jump to plt0_entry. This is | |
458 | used for x86-64 only. */ | |
459 | unsigned int plt_plt_insn_end; | |
460 | ||
461 | /* Offset into plt_entry where the initial value of the GOT entry | |
462 | points. */ | |
463 | unsigned int plt_lazy_offset; | |
464 | ||
465 | /* The first entry in a PIC lazy procedure linkage table looks like | |
a6798bab | 466 | this. */ |
765e526c L |
467 | const bfd_byte *pic_plt0_entry; |
468 | ||
469 | /* Subsequent entries in a PIC lazy procedure linkage table look | |
a6798bab | 470 | like this. */ |
765e526c L |
471 | const bfd_byte *pic_plt_entry; |
472 | ||
473 | /* .eh_frame covering the lazy .plt section. */ | |
474 | const bfd_byte *eh_frame_plt; | |
475 | unsigned int eh_frame_plt_size; | |
476 | }; | |
477 | ||
478 | struct elf_x86_non_lazy_plt_layout | |
479 | { | |
92e68c1d | 480 | /* Entries in a non-lazy procedure linkage table look like this. */ |
765e526c | 481 | const bfd_byte *plt_entry; |
92e68c1d L |
482 | /* Entries in a PIC non-lazy procedure linkage table look like this. |
483 | This is only used for i386 where absolute PLT and PIC PLT are | |
484 | different. */ | |
765e526c L |
485 | const bfd_byte *pic_plt_entry; |
486 | ||
07d6d2b8 | 487 | unsigned int plt_entry_size; /* Size of each PLT entry. */ |
765e526c L |
488 | |
489 | /* Offsets into plt_entry that are to be replaced with... */ | |
490 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
491 | ||
492 | /* Length of the PC-relative instruction containing plt_got_offset. | |
493 | This is used for x86-64 only. */ | |
494 | unsigned int plt_got_insn_size; | |
495 | ||
496 | /* .eh_frame covering the non-lazy .plt section. */ | |
497 | const bfd_byte *eh_frame_plt; | |
498 | unsigned int eh_frame_plt_size; | |
499 | }; | |
500 | ||
501 | struct elf_x86_plt_layout | |
502 | { | |
92e68c1d | 503 | /* The first entry in a lazy procedure linkage table looks like this. */ |
765e526c L |
504 | const bfd_byte *plt0_entry; |
505 | /* Entries in a procedure linkage table look like this. */ | |
506 | const bfd_byte *plt_entry; | |
07d6d2b8 | 507 | unsigned int plt_entry_size; /* Size of each PLT entry. */ |
765e526c L |
508 | |
509 | /* 1 has PLT0. */ | |
510 | unsigned int has_plt0; | |
511 | ||
512 | /* Offsets into plt_entry that are to be replaced with... */ | |
513 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
514 | ||
515 | /* Length of the PC-relative instruction containing plt_got_offset. | |
516 | This is only used for x86-64. */ | |
517 | unsigned int plt_got_insn_size; | |
518 | ||
b44ee3a8 L |
519 | /* Alignment of the .iplt section. */ |
520 | unsigned int iplt_alignment; | |
521 | ||
765e526c L |
522 | /* .eh_frame covering the .plt section. */ |
523 | const bfd_byte *eh_frame_plt; | |
524 | unsigned int eh_frame_plt_size; | |
525 | }; | |
526 | ||
6b9553e2 | 527 | /* Values in tls_type of x86 ELF linker hash entry. */ |
0afcef53 L |
528 | #define GOT_UNKNOWN 0 |
529 | #define GOT_NORMAL 1 | |
530 | #define GOT_TLS_GD 2 | |
6b9553e2 L |
531 | #define GOT_TLS_IE 4 |
532 | #define GOT_TLS_IE_POS 5 | |
533 | #define GOT_TLS_IE_NEG 6 | |
534 | #define GOT_TLS_IE_BOTH 7 | |
535 | #define GOT_TLS_GDESC 8 | |
382aae06 | 536 | #define GOT_ABS 9 |
6b9553e2 L |
537 | #define GOT_TLS_GD_BOTH_P(type) \ |
538 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
539 | #define GOT_TLS_GD_P(type) \ | |
540 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
541 | #define GOT_TLS_GDESC_P(type) \ | |
542 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
543 | #define GOT_TLS_GD_ANY_P(type) \ | |
544 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
0afcef53 L |
545 | |
546 | #define elf_x86_hash_entry(ent) \ | |
547 | ((struct elf_x86_link_hash_entry *)(ent)) | |
548 | ||
5af6f000 L |
549 | /* Information of an input relocation used to compute its contribution |
550 | to the DT_RELR section size. */ | |
551 | ||
552 | struct elf_x86_relative_reloc_record | |
553 | { | |
554 | /* The original relocation info. */ | |
555 | Elf_Internal_Rela rel; | |
556 | /* The input or the GOT section where the relocation is applied. */ | |
557 | asection *sec; | |
558 | /* Local symbol info. NULL for global symbol. */ | |
559 | Elf_Internal_Sym *sym; | |
560 | union | |
561 | { | |
562 | /* Section where the local symbol is defined. */ | |
563 | asection *sym_sec; | |
564 | /* Global symbol hash. */ | |
565 | struct elf_link_hash_entry *h; | |
566 | } u; | |
567 | /* The offset into the output section where the relative relocation | |
568 | will be applied at run-time. */ | |
569 | bfd_vma offset; | |
570 | /* The run-time address. */ | |
571 | bfd_vma address; | |
572 | }; | |
573 | ||
574 | struct elf_x86_relative_reloc_data | |
575 | { | |
576 | bfd_size_type count; | |
577 | bfd_size_type size; | |
578 | struct elf_x86_relative_reloc_record *data; | |
579 | }; | |
580 | ||
581 | /* DT_RELR bitmap. */ | |
582 | struct elf_dt_relr_bitmap | |
583 | { | |
584 | bfd_size_type count; | |
585 | bfd_size_type size; | |
586 | union | |
587 | { | |
588 | /* 32-bit bitmap. */ | |
589 | uint32_t *elf32; | |
590 | /* 64-bit bitmap. */ | |
591 | uint64_t *elf64; | |
592 | } u; | |
593 | }; | |
594 | ||
0afcef53 L |
595 | /* x86 ELF linker hash table. */ |
596 | ||
597 | struct elf_x86_link_hash_table | |
598 | { | |
599 | struct elf_link_hash_table elf; | |
600 | ||
601 | /* Short-cuts to get to dynamic linker sections. */ | |
602 | asection *interp; | |
603 | asection *plt_eh_frame; | |
604 | asection *plt_second; | |
605 | asection *plt_second_eh_frame; | |
606 | asection *plt_got; | |
607 | asection *plt_got_eh_frame; | |
608 | ||
cf0e0a0b IB |
609 | sframe_encoder_ctx *plt_cfe_ctx; |
610 | asection *plt_sframe; | |
611 | sframe_encoder_ctx *plt_second_cfe_ctx; | |
612 | asection *plt_second_sframe; | |
613 | ||
765e526c L |
614 | /* Parameters describing PLT generation, lazy or non-lazy. */ |
615 | struct elf_x86_plt_layout plt; | |
616 | ||
617 | /* Parameters describing lazy PLT generation. */ | |
618 | const struct elf_x86_lazy_plt_layout *lazy_plt; | |
619 | ||
620 | /* Parameters describing non-lazy PLT generation. */ | |
621 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
622 | ||
cf0e0a0b IB |
623 | /* The .sframe helper object for .plt section. |
624 | This is used for x86-64 only. */ | |
625 | const struct elf_x86_sframe_plt *sframe_plt; | |
626 | ||
0afcef53 L |
627 | union |
628 | { | |
629 | bfd_signed_vma refcount; | |
630 | bfd_vma offset; | |
631 | } tls_ld_or_ldm_got; | |
632 | ||
633 | /* The amount of space used by the jump slots in the GOT. */ | |
634 | bfd_vma sgotplt_jump_table_size; | |
635 | ||
0afcef53 L |
636 | /* _TLS_MODULE_BASE_ symbol. */ |
637 | struct bfd_link_hash_entry *tls_module_base; | |
638 | ||
639 | /* Used by local STT_GNU_IFUNC symbols. */ | |
640 | htab_t loc_hash_table; | |
641 | void * loc_hash_memory; | |
642 | ||
0afcef53 L |
643 | /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */ |
644 | bfd_vma next_jump_slot_index; | |
645 | /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */ | |
646 | bfd_vma next_irelative_index; | |
647 | ||
765e526c L |
648 | /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. |
649 | This is used for i386 only. */ | |
650 | asection *srelplt2; | |
651 | ||
652 | /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. This | |
2926eb2c | 653 | is only used for i386. */ |
765e526c L |
654 | bfd_vma next_tls_desc_index; |
655 | ||
5af6f000 L |
656 | /* DT_RELR bitmap. */ |
657 | struct elf_dt_relr_bitmap dt_relr_bitmap; | |
658 | ||
659 | /* Relative relocation data. */ | |
660 | struct elf_x86_relative_reloc_data relative_reloc; | |
661 | ||
662 | /* Unaligned relative relocation data. */ | |
663 | struct elf_x86_relative_reloc_data unaligned_relative_reloc; | |
664 | ||
665 | /* Number of relative reloc generation pass. */ | |
666 | unsigned int generate_relative_reloc_pass; | |
667 | ||
851b6fa1 L |
668 | /* Value used to fill the unused bytes of the first PLT entry. This |
669 | is only used for i386. */ | |
670 | bfd_byte plt0_pad_byte; | |
671 | ||
cd048363 L |
672 | /* TRUE if GOT is referenced. */ |
673 | unsigned int got_referenced : 1; | |
674 | ||
451875b4 L |
675 | /* TRUE if PLT is PC-relative. PLT in PDE and PC-relative PLT in PIE |
676 | can be used as function address. | |
677 | ||
678 | NB: i386 has non-PIC PLT and PIC PLT. Only non-PIC PLT in PDE can | |
679 | be used as function address. PIC PLT in PIE can't be used as | |
680 | function address. */ | |
681 | unsigned int pcrel_plt : 1; | |
682 | ||
0afcef53 L |
683 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
684 | bfd_vma (*r_sym) (bfd_vma); | |
0a1b45a2 | 685 | bool (*is_reloc_section) (const char *); |
503294e7 | 686 | unsigned int sizeof_reloc; |
9ff114ca | 687 | unsigned int got_entry_size; |
0afcef53 | 688 | unsigned int pointer_r_type; |
5af6f000 | 689 | unsigned int relative_r_type; |
0afcef53 L |
690 | int dynamic_interpreter_size; |
691 | const char *dynamic_interpreter; | |
692 | const char *tls_get_addr; | |
5af6f000 L |
693 | const char *relative_r_name; |
694 | void (*elf_append_reloc) (bfd *, asection *, Elf_Internal_Rela *); | |
695 | void (*elf_write_addend) (bfd *, uint64_t, void *); | |
696 | void (*elf_write_addend_in_got) (bfd *, uint64_t, void *); | |
5b9c07b2 L |
697 | |
698 | /* Options passed from the linker. */ | |
699 | struct elf_linker_x86_params *params; | |
0afcef53 L |
700 | }; |
701 | ||
1de031c8 | 702 | struct elf_x86_init_table |
a6798bab L |
703 | { |
704 | /* The lazy PLT layout. */ | |
705 | const struct elf_x86_lazy_plt_layout *lazy_plt; | |
706 | ||
707 | /* The non-lazy PLT layout. */ | |
708 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
709 | ||
710 | /* The lazy PLT layout for IBT. */ | |
711 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
712 | ||
713 | /* The non-lazy PLT layout for IBT. */ | |
714 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
715 | ||
cf0e0a0b IB |
716 | /* The .sframe helper object for lazy .plt section. |
717 | This is used for x86-64 only. */ | |
718 | const struct elf_x86_sframe_plt *sframe_lazy_plt; | |
719 | ||
720 | /* The .sframe helper object for non-lazy .plt section. | |
721 | This is used for x86-64 only. */ | |
722 | const struct elf_x86_sframe_plt *sframe_non_lazy_plt; | |
723 | ||
724 | /* The .sframe helper object for lazy IBT .plt section. | |
725 | This is used for x86-64 only. */ | |
726 | const struct elf_x86_sframe_plt *sframe_lazy_ibt_plt; | |
727 | ||
728 | /* The .sframe helper object for non-lazy IBT .plt section. | |
729 | This is used for x86-64 only. */ | |
730 | const struct elf_x86_sframe_plt *sframe_non_lazy_ibt_plt; | |
731 | ||
851b6fa1 | 732 | bfd_byte plt0_pad_byte; |
7a382c1c L |
733 | |
734 | bfd_vma (*r_info) (bfd_vma, bfd_vma); | |
735 | bfd_vma (*r_sym) (bfd_vma); | |
a6798bab L |
736 | }; |
737 | ||
0afcef53 L |
738 | struct elf_x86_obj_tdata |
739 | { | |
740 | struct elf_obj_tdata root; | |
741 | ||
742 | /* tls_type for each local got entry. */ | |
743 | char *local_got_tls_type; | |
744 | ||
745 | /* GOTPLT entries for TLS descriptors. */ | |
746 | bfd_vma *local_tlsdesc_gotent; | |
5af6f000 L |
747 | |
748 | /* R_*_RELATIVE relocation in GOT for this local symbol has been | |
749 | processed. */ | |
750 | char *relative_reloc_done; | |
0afcef53 L |
751 | }; |
752 | ||
f493882d L |
753 | enum elf_x86_plt_type |
754 | { | |
755 | plt_non_lazy = 0, | |
756 | plt_lazy = 1 << 0, | |
757 | plt_pic = 1 << 1, | |
758 | plt_second = 1 << 2, | |
759 | plt_unknown = -1 | |
760 | }; | |
761 | ||
762 | struct elf_x86_plt | |
763 | { | |
764 | const char *name; | |
765 | asection *sec; | |
766 | bfd_byte *contents; | |
767 | enum elf_x86_plt_type type; | |
768 | unsigned int plt_got_offset; | |
769 | unsigned int plt_entry_size; | |
770 | unsigned int plt_got_insn_size; /* Only used for x86-64. */ | |
771 | long count; | |
772 | }; | |
773 | ||
382aae06 L |
774 | /* Set if a relocation is converted from a GOTPCREL relocation. */ |
775 | #define R_X86_64_converted_reloc_bit (1 << 7) | |
776 | ||
0afcef53 L |
777 | #define elf_x86_tdata(abfd) \ |
778 | ((struct elf_x86_obj_tdata *) (abfd)->tdata.any) | |
779 | ||
780 | #define elf_x86_local_got_tls_type(abfd) \ | |
781 | (elf_x86_tdata (abfd)->local_got_tls_type) | |
782 | ||
783 | #define elf_x86_local_tlsdesc_gotent(abfd) \ | |
784 | (elf_x86_tdata (abfd)->local_tlsdesc_gotent) | |
785 | ||
5af6f000 L |
786 | #define elf_x86_relative_reloc_done(abfd) \ |
787 | (elf_x86_tdata (abfd)->relative_reloc_done) | |
788 | ||
9ff114ca L |
789 | #define elf_x86_compute_jump_table_size(htab) \ |
790 | ((htab)->elf.srelplt->reloc_count * (htab)->got_entry_size) | |
791 | ||
fe53b4a4 L |
792 | #define is_x86_elf(bfd, htab) \ |
793 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
794 | && elf_tdata (bfd) != NULL \ | |
add5f777 | 795 | && elf_object_id (bfd) == (htab)->elf.hash_table_id) |
fe53b4a4 | 796 | |
a321de3f L |
797 | /* Rename some of the generic section flags to better document how they |
798 | are used here. */ | |
799 | #define check_relocs_failed sec_flg0 | |
5af6f000 | 800 | #define relative_reloc_packed sec_flg1 |
a321de3f | 801 | |
0a1b45a2 | 802 | extern bool _bfd_x86_elf_mkobject |
39946cc2 L |
803 | (bfd *); |
804 | ||
0afcef53 L |
805 | extern void _bfd_x86_elf_set_tls_module_base |
806 | (struct bfd_link_info *); | |
807 | ||
808 | extern bfd_vma _bfd_x86_elf_dtpoff_base | |
809 | (struct bfd_link_info *); | |
810 | ||
0a1b45a2 | 811 | extern bool _bfd_x86_elf_readonly_dynrelocs |
0afcef53 L |
812 | (struct elf_link_hash_entry *, void *); |
813 | ||
814 | extern struct elf_link_hash_entry * _bfd_elf_x86_get_local_sym_hash | |
815 | (struct elf_x86_link_hash_table *, bfd *, const Elf_Internal_Rela *, | |
0a1b45a2 | 816 | bool); |
0afcef53 L |
817 | |
818 | extern hashval_t _bfd_x86_elf_local_htab_hash | |
819 | (const void *); | |
820 | ||
821 | extern int _bfd_x86_elf_local_htab_eq | |
822 | (const void *, const void *); | |
823 | ||
824 | extern struct bfd_hash_entry * _bfd_x86_elf_link_hash_newfunc | |
825 | (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); | |
826 | ||
765e526c | 827 | extern struct bfd_link_hash_table * _bfd_x86_elf_link_hash_table_create |
0afcef53 L |
828 | (bfd *); |
829 | ||
830 | extern int _bfd_x86_elf_compare_relocs | |
831 | (const void *, const void *); | |
832 | ||
0a1b45a2 | 833 | extern bool _bfd_x86_elf_link_check_relocs |
0afcef53 L |
834 | (bfd *, struct bfd_link_info *); |
835 | ||
3747999c L |
836 | extern bool _bfd_x86_elf_check_relocs |
837 | (bfd *, struct bfd_link_info *, asection *, | |
838 | const Elf_Internal_Rela *); | |
839 | ||
5af6f000 L |
840 | extern bool _bfd_x86_elf_link_relax_section |
841 | (bfd *, asection *, struct bfd_link_info *, bool *); | |
842 | ||
843 | extern bool _bfd_elf_x86_size_relative_relocs | |
844 | (struct bfd_link_info *, bool *); | |
845 | ||
846 | extern bool _bfd_elf_x86_finish_relative_relocs | |
847 | (struct bfd_link_info *); | |
848 | ||
849 | extern void _bfd_elf32_write_addend (bfd *, uint64_t, void *); | |
850 | extern void _bfd_elf64_write_addend (bfd *, uint64_t, void *); | |
851 | ||
0a1b45a2 | 852 | extern bool _bfd_elf_x86_valid_reloc_p |
382aae06 L |
853 | (asection *, struct bfd_link_info *, struct elf_x86_link_hash_table *, |
854 | const Elf_Internal_Rela *, struct elf_link_hash_entry *, | |
0a1b45a2 | 855 | Elf_Internal_Sym *, Elf_Internal_Shdr *, bool *); |
382aae06 | 856 | |
0a1b45a2 | 857 | extern bool _bfd_x86_elf_size_dynamic_sections |
5e2ac45d L |
858 | (bfd *, struct bfd_link_info *); |
859 | ||
9577f60b L |
860 | extern struct elf_x86_link_hash_table *_bfd_x86_elf_finish_dynamic_sections |
861 | (bfd *, struct bfd_link_info *); | |
862 | ||
0a1b45a2 | 863 | extern bool _bfd_x86_elf_always_size_sections |
0afcef53 L |
864 | (bfd *, struct bfd_link_info *); |
865 | ||
866 | extern void _bfd_x86_elf_merge_symbol_attribute | |
0a1b45a2 | 867 | (struct elf_link_hash_entry *, unsigned int, bool, bool); |
0afcef53 L |
868 | |
869 | extern void _bfd_x86_elf_copy_indirect_symbol | |
870 | (struct bfd_link_info *, struct elf_link_hash_entry *, | |
871 | struct elf_link_hash_entry *); | |
872 | ||
0a1b45a2 | 873 | extern bool _bfd_x86_elf_fixup_symbol |
0afcef53 L |
874 | (struct bfd_link_info *, struct elf_link_hash_entry *); |
875 | ||
0a1b45a2 | 876 | extern bool _bfd_x86_elf_hash_symbol |
0afcef53 L |
877 | (struct elf_link_hash_entry *); |
878 | ||
0a1b45a2 | 879 | extern bool _bfd_x86_elf_adjust_dynamic_symbol |
eeb2f20a L |
880 | (struct bfd_link_info *, struct elf_link_hash_entry *); |
881 | ||
9f857535 | 882 | extern void _bfd_x86_elf_hide_symbol |
0a1b45a2 | 883 | (struct bfd_link_info *, struct elf_link_hash_entry *, bool); |
9f857535 | 884 | |
0a1b45a2 | 885 | extern bool _bfd_x86_elf_link_symbol_references_local |
6999821f L |
886 | (struct bfd_link_info *, struct elf_link_hash_entry *); |
887 | ||
4f501a24 L |
888 | extern asection * _bfd_x86_elf_gc_mark_hook |
889 | (asection *, struct bfd_link_info *, Elf_Internal_Rela *, | |
890 | struct elf_link_hash_entry *, Elf_Internal_Sym *); | |
891 | ||
f493882d L |
892 | extern long _bfd_x86_elf_get_synthetic_symtab |
893 | (bfd *, long, long, bfd_vma, struct elf_x86_plt [], asymbol **, | |
894 | asymbol **); | |
895 | ||
0afcef53 L |
896 | extern enum elf_property_kind _bfd_x86_elf_parse_gnu_properties |
897 | (bfd *, unsigned int, bfd_byte *, unsigned int); | |
898 | ||
0a1b45a2 | 899 | extern bool _bfd_x86_elf_merge_gnu_properties |
4e539114 | 900 | (struct bfd_link_info *, bfd *, bfd *, elf_property *, elf_property *); |
0afcef53 | 901 | |
bfb1e8c1 L |
902 | extern void _bfd_x86_elf_link_fixup_gnu_properties |
903 | (struct bfd_link_info *, elf_property_list **); | |
904 | ||
a6798bab | 905 | extern bfd * _bfd_x86_elf_link_setup_gnu_properties |
1de031c8 | 906 | (struct bfd_link_info *, struct elf_x86_init_table *); |
a6798bab | 907 | |
4ec09950 L |
908 | extern void _bfd_x86_elf_link_fixup_ifunc_symbol |
909 | (struct bfd_link_info *, struct elf_x86_link_hash_table *, | |
910 | struct elf_link_hash_entry *, Elf_Internal_Sym *sym); | |
911 | ||
68b00778 L |
912 | extern void _bfd_x86_elf_link_report_relative_reloc |
913 | (struct bfd_link_info *, asection *, struct elf_link_hash_entry *, | |
914 | Elf_Internal_Sym *, const char *, const void *); | |
915 | ||
39946cc2 L |
916 | #define bfd_elf64_mkobject \ |
917 | _bfd_x86_elf_mkobject | |
918 | #define bfd_elf32_mkobject \ | |
919 | _bfd_x86_elf_mkobject | |
765e526c L |
920 | #define bfd_elf64_bfd_link_hash_table_create \ |
921 | _bfd_x86_elf_link_hash_table_create | |
922 | #define bfd_elf32_bfd_link_hash_table_create \ | |
923 | _bfd_x86_elf_link_hash_table_create | |
0afcef53 L |
924 | #define bfd_elf64_bfd_link_check_relocs \ |
925 | _bfd_x86_elf_link_check_relocs | |
926 | #define bfd_elf32_bfd_link_check_relocs \ | |
927 | _bfd_x86_elf_link_check_relocs | |
5af6f000 L |
928 | #define bfd_elf32_bfd_relax_section \ |
929 | _bfd_x86_elf_link_relax_section | |
930 | #define bfd_elf64_bfd_relax_section \ | |
931 | _bfd_x86_elf_link_relax_section | |
0afcef53 | 932 | |
3747999c L |
933 | #define elf_backend_check_relocs \ |
934 | _bfd_x86_elf_check_relocs | |
5e2ac45d L |
935 | #define elf_backend_size_dynamic_sections \ |
936 | _bfd_x86_elf_size_dynamic_sections | |
0afcef53 L |
937 | #define elf_backend_merge_symbol_attribute \ |
938 | _bfd_x86_elf_merge_symbol_attribute | |
939 | #define elf_backend_copy_indirect_symbol \ | |
940 | _bfd_x86_elf_copy_indirect_symbol | |
941 | #define elf_backend_fixup_symbol \ | |
942 | _bfd_x86_elf_fixup_symbol | |
943 | #define elf_backend_hash_symbol \ | |
944 | _bfd_x86_elf_hash_symbol | |
eeb2f20a L |
945 | #define elf_backend_adjust_dynamic_symbol \ |
946 | _bfd_x86_elf_adjust_dynamic_symbol | |
4f501a24 L |
947 | #define elf_backend_gc_mark_hook \ |
948 | _bfd_x86_elf_gc_mark_hook | |
0afcef53 | 949 | #define elf_backend_omit_section_dynsym \ |
d00dd7dc | 950 | _bfd_elf_omit_section_dynsym_all |
0afcef53 L |
951 | #define elf_backend_parse_gnu_properties \ |
952 | _bfd_x86_elf_parse_gnu_properties | |
953 | #define elf_backend_merge_gnu_properties \ | |
954 | _bfd_x86_elf_merge_gnu_properties | |
bfb1e8c1 L |
955 | #define elf_backend_fixup_gnu_properties \ |
956 | _bfd_x86_elf_link_fixup_gnu_properties | |
5af6f000 L |
957 | #define elf_backend_size_relative_relocs \ |
958 | _bfd_elf_x86_size_relative_relocs | |
959 | #define elf_backend_finish_relative_relocs \ | |
960 | _bfd_elf_x86_finish_relative_relocs | |
794f2bba | 961 | |
74e315db L |
962 | #define ELF_P_ALIGN ELF_MINPAGESIZE |
963 | ||
bbdeb108 L |
964 | /* Allocate x86 GOT info for local symbols. */ |
965 | ||
966 | static inline bool | |
967 | elf_x86_allocate_local_got_info (bfd *abfd, bfd_size_type count) | |
968 | { | |
969 | bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); | |
970 | if (local_got_refcounts == NULL) | |
971 | { | |
972 | bfd_size_type size = count * (sizeof (bfd_signed_vma) | |
5af6f000 L |
973 | + sizeof (bfd_vma) |
974 | + 2 * sizeof(char)); | |
bbdeb108 L |
975 | local_got_refcounts = (bfd_signed_vma *) bfd_zalloc (abfd, size); |
976 | if (local_got_refcounts == NULL) | |
977 | return false; | |
978 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
979 | elf_x86_local_tlsdesc_gotent (abfd) = | |
980 | (bfd_vma *) (local_got_refcounts + count); | |
981 | elf_x86_local_got_tls_type (abfd) = | |
982 | (char *) (local_got_refcounts + 2 * count); | |
5af6f000 L |
983 | elf_x86_relative_reloc_done (abfd) = |
984 | ((char *) (local_got_refcounts + 2 * count)) + count; | |
bbdeb108 L |
985 | } |
986 | return true; | |
987 | } |