Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* ELF linking support for BFD. |
6f2750fe | 2 | Copyright (C) 1995-2016 Free Software Foundation, Inc. |
252b5132 | 3 | |
8fdd7217 | 4 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 5 | |
8fdd7217 NC |
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 | |
cd123cb7 | 8 | the Free Software Foundation; either version 3 of the License, or |
8fdd7217 | 9 | (at your option) any later version. |
252b5132 | 10 | |
8fdd7217 NC |
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. | |
252b5132 | 15 | |
8fdd7217 NC |
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 | |
cd123cb7 NC |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | MA 02110-1301, USA. */ | |
252b5132 | 20 | |
252b5132 | 21 | #include "sysdep.h" |
3db64b00 | 22 | #include "bfd.h" |
53df40a4 | 23 | #include "bfd_stdint.h" |
252b5132 RH |
24 | #include "bfdlink.h" |
25 | #include "libbfd.h" | |
26 | #define ARCH_SIZE 0 | |
27 | #include "elf-bfd.h" | |
4ad4eba5 | 28 | #include "safe-ctype.h" |
ccf2f652 | 29 | #include "libiberty.h" |
66eb6687 | 30 | #include "objalloc.h" |
252b5132 | 31 | |
28caa186 AM |
32 | /* This struct is used to pass information to routines called via |
33 | elf_link_hash_traverse which must return failure. */ | |
34 | ||
35 | struct elf_info_failed | |
36 | { | |
37 | struct bfd_link_info *info; | |
28caa186 AM |
38 | bfd_boolean failed; |
39 | }; | |
40 | ||
41 | /* This structure is used to pass information to | |
42 | _bfd_elf_link_find_version_dependencies. */ | |
43 | ||
44 | struct elf_find_verdep_info | |
45 | { | |
46 | /* General link information. */ | |
47 | struct bfd_link_info *info; | |
48 | /* The number of dependencies. */ | |
49 | unsigned int vers; | |
50 | /* Whether we had a failure. */ | |
51 | bfd_boolean failed; | |
52 | }; | |
53 | ||
54 | static bfd_boolean _bfd_elf_fix_symbol_flags | |
55 | (struct elf_link_hash_entry *, struct elf_info_failed *); | |
56 | ||
2f0c68f2 CM |
57 | asection * |
58 | _bfd_elf_section_for_symbol (struct elf_reloc_cookie *cookie, | |
59 | unsigned long r_symndx, | |
60 | bfd_boolean discard) | |
61 | { | |
62 | if (r_symndx >= cookie->locsymcount | |
63 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
64 | { | |
65 | struct elf_link_hash_entry *h; | |
66 | ||
67 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; | |
68 | ||
69 | while (h->root.type == bfd_link_hash_indirect | |
70 | || h->root.type == bfd_link_hash_warning) | |
71 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
72 | ||
73 | if ((h->root.type == bfd_link_hash_defined | |
74 | || h->root.type == bfd_link_hash_defweak) | |
75 | && discarded_section (h->root.u.def.section)) | |
76 | return h->root.u.def.section; | |
77 | else | |
78 | return NULL; | |
79 | } | |
80 | else | |
81 | { | |
82 | /* It's not a relocation against a global symbol, | |
83 | but it could be a relocation against a local | |
84 | symbol for a discarded section. */ | |
85 | asection *isec; | |
86 | Elf_Internal_Sym *isym; | |
87 | ||
88 | /* Need to: get the symbol; get the section. */ | |
89 | isym = &cookie->locsyms[r_symndx]; | |
90 | isec = bfd_section_from_elf_index (cookie->abfd, isym->st_shndx); | |
91 | if (isec != NULL | |
92 | && discard ? discarded_section (isec) : 1) | |
93 | return isec; | |
94 | } | |
95 | return NULL; | |
96 | } | |
97 | ||
d98685ac AM |
98 | /* Define a symbol in a dynamic linkage section. */ |
99 | ||
100 | struct elf_link_hash_entry * | |
101 | _bfd_elf_define_linkage_sym (bfd *abfd, | |
102 | struct bfd_link_info *info, | |
103 | asection *sec, | |
104 | const char *name) | |
105 | { | |
106 | struct elf_link_hash_entry *h; | |
107 | struct bfd_link_hash_entry *bh; | |
ccabcbe5 | 108 | const struct elf_backend_data *bed; |
d98685ac AM |
109 | |
110 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, FALSE); | |
111 | if (h != NULL) | |
112 | { | |
113 | /* Zap symbol defined in an as-needed lib that wasn't linked. | |
114 | This is a symptom of a larger problem: Absolute symbols | |
115 | defined in shared libraries can't be overridden, because we | |
116 | lose the link to the bfd which is via the symbol section. */ | |
117 | h->root.type = bfd_link_hash_new; | |
118 | } | |
119 | ||
120 | bh = &h->root; | |
cf18fda4 | 121 | bed = get_elf_backend_data (abfd); |
d98685ac | 122 | if (!_bfd_generic_link_add_one_symbol (info, abfd, name, BSF_GLOBAL, |
cf18fda4 | 123 | sec, 0, NULL, FALSE, bed->collect, |
d98685ac AM |
124 | &bh)) |
125 | return NULL; | |
126 | h = (struct elf_link_hash_entry *) bh; | |
127 | h->def_regular = 1; | |
e28df02b | 128 | h->non_elf = 0; |
12b2843a | 129 | h->root.linker_def = 1; |
d98685ac | 130 | h->type = STT_OBJECT; |
00b7642b AM |
131 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
132 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
d98685ac | 133 | |
ccabcbe5 | 134 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
d98685ac AM |
135 | return h; |
136 | } | |
137 | ||
b34976b6 | 138 | bfd_boolean |
268b6b39 | 139 | _bfd_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) |
252b5132 RH |
140 | { |
141 | flagword flags; | |
aad5d350 | 142 | asection *s; |
252b5132 | 143 | struct elf_link_hash_entry *h; |
9c5bfbb7 | 144 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 145 | struct elf_link_hash_table *htab = elf_hash_table (info); |
252b5132 RH |
146 | |
147 | /* This function may be called more than once. */ | |
3d4d4302 AM |
148 | s = bfd_get_linker_section (abfd, ".got"); |
149 | if (s != NULL) | |
b34976b6 | 150 | return TRUE; |
252b5132 | 151 | |
e5a52504 | 152 | flags = bed->dynamic_sec_flags; |
252b5132 | 153 | |
14b2f831 AM |
154 | s = bfd_make_section_anyway_with_flags (abfd, |
155 | (bed->rela_plts_and_copies_p | |
156 | ? ".rela.got" : ".rel.got"), | |
157 | (bed->dynamic_sec_flags | |
158 | | SEC_READONLY)); | |
6de2ae4a L |
159 | if (s == NULL |
160 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
161 | return FALSE; | |
162 | htab->srelgot = s; | |
252b5132 | 163 | |
14b2f831 | 164 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
64e77c6d L |
165 | if (s == NULL |
166 | || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
167 | return FALSE; | |
168 | htab->sgot = s; | |
169 | ||
252b5132 RH |
170 | if (bed->want_got_plt) |
171 | { | |
14b2f831 | 172 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
252b5132 | 173 | if (s == NULL |
6de2ae4a L |
174 | || !bfd_set_section_alignment (abfd, s, |
175 | bed->s->log_file_align)) | |
b34976b6 | 176 | return FALSE; |
6de2ae4a | 177 | htab->sgotplt = s; |
252b5132 RH |
178 | } |
179 | ||
64e77c6d L |
180 | /* The first bit of the global offset table is the header. */ |
181 | s->size += bed->got_header_size; | |
182 | ||
2517a57f AM |
183 | if (bed->want_got_sym) |
184 | { | |
185 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got | |
186 | (or .got.plt) section. We don't do this in the linker script | |
187 | because we don't want to define the symbol if we are not creating | |
188 | a global offset table. */ | |
6de2ae4a L |
189 | h = _bfd_elf_define_linkage_sym (abfd, info, s, |
190 | "_GLOBAL_OFFSET_TABLE_"); | |
2517a57f | 191 | elf_hash_table (info)->hgot = h; |
d98685ac AM |
192 | if (h == NULL) |
193 | return FALSE; | |
2517a57f | 194 | } |
252b5132 | 195 | |
b34976b6 | 196 | return TRUE; |
252b5132 RH |
197 | } |
198 | \f | |
7e9f0867 AM |
199 | /* Create a strtab to hold the dynamic symbol names. */ |
200 | static bfd_boolean | |
201 | _bfd_elf_link_create_dynstrtab (bfd *abfd, struct bfd_link_info *info) | |
202 | { | |
203 | struct elf_link_hash_table *hash_table; | |
204 | ||
205 | hash_table = elf_hash_table (info); | |
206 | if (hash_table->dynobj == NULL) | |
6cd255ca L |
207 | { |
208 | /* We may not set dynobj, an input file holding linker created | |
209 | dynamic sections to abfd, which may be a dynamic object with | |
210 | its own dynamic sections. We need to find a normal input file | |
211 | to hold linker created sections if possible. */ | |
212 | if ((abfd->flags & (DYNAMIC | BFD_PLUGIN)) != 0) | |
213 | { | |
214 | bfd *ibfd; | |
215 | for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) | |
6645479e L |
216 | if ((ibfd->flags |
217 | & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0) | |
6cd255ca L |
218 | { |
219 | abfd = ibfd; | |
220 | break; | |
221 | } | |
222 | } | |
223 | hash_table->dynobj = abfd; | |
224 | } | |
7e9f0867 AM |
225 | |
226 | if (hash_table->dynstr == NULL) | |
227 | { | |
228 | hash_table->dynstr = _bfd_elf_strtab_init (); | |
229 | if (hash_table->dynstr == NULL) | |
230 | return FALSE; | |
231 | } | |
232 | return TRUE; | |
233 | } | |
234 | ||
45d6a902 AM |
235 | /* Create some sections which will be filled in with dynamic linking |
236 | information. ABFD is an input file which requires dynamic sections | |
237 | to be created. The dynamic sections take up virtual memory space | |
238 | when the final executable is run, so we need to create them before | |
239 | addresses are assigned to the output sections. We work out the | |
240 | actual contents and size of these sections later. */ | |
252b5132 | 241 | |
b34976b6 | 242 | bfd_boolean |
268b6b39 | 243 | _bfd_elf_link_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 244 | { |
45d6a902 | 245 | flagword flags; |
91d6fa6a | 246 | asection *s; |
9c5bfbb7 | 247 | const struct elf_backend_data *bed; |
9637f6ef | 248 | struct elf_link_hash_entry *h; |
252b5132 | 249 | |
0eddce27 | 250 | if (! is_elf_hash_table (info->hash)) |
45d6a902 AM |
251 | return FALSE; |
252 | ||
253 | if (elf_hash_table (info)->dynamic_sections_created) | |
254 | return TRUE; | |
255 | ||
7e9f0867 AM |
256 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
257 | return FALSE; | |
45d6a902 | 258 | |
7e9f0867 | 259 | abfd = elf_hash_table (info)->dynobj; |
e5a52504 MM |
260 | bed = get_elf_backend_data (abfd); |
261 | ||
262 | flags = bed->dynamic_sec_flags; | |
45d6a902 AM |
263 | |
264 | /* A dynamically linked executable has a .interp section, but a | |
265 | shared library does not. */ | |
9b8b325a | 266 | if (bfd_link_executable (info) && !info->nointerp) |
252b5132 | 267 | { |
14b2f831 AM |
268 | s = bfd_make_section_anyway_with_flags (abfd, ".interp", |
269 | flags | SEC_READONLY); | |
3496cb2a | 270 | if (s == NULL) |
45d6a902 AM |
271 | return FALSE; |
272 | } | |
bb0deeff | 273 | |
45d6a902 AM |
274 | /* Create sections to hold version informations. These are removed |
275 | if they are not needed. */ | |
14b2f831 AM |
276 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version_d", |
277 | flags | SEC_READONLY); | |
45d6a902 | 278 | if (s == NULL |
45d6a902 AM |
279 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
280 | return FALSE; | |
281 | ||
14b2f831 AM |
282 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version", |
283 | flags | SEC_READONLY); | |
45d6a902 | 284 | if (s == NULL |
45d6a902 AM |
285 | || ! bfd_set_section_alignment (abfd, s, 1)) |
286 | return FALSE; | |
287 | ||
14b2f831 AM |
288 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version_r", |
289 | flags | SEC_READONLY); | |
45d6a902 | 290 | if (s == NULL |
45d6a902 AM |
291 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
292 | return FALSE; | |
293 | ||
14b2f831 AM |
294 | s = bfd_make_section_anyway_with_flags (abfd, ".dynsym", |
295 | flags | SEC_READONLY); | |
45d6a902 | 296 | if (s == NULL |
45d6a902 AM |
297 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
298 | return FALSE; | |
cae1fbbb | 299 | elf_hash_table (info)->dynsym = s; |
45d6a902 | 300 | |
14b2f831 AM |
301 | s = bfd_make_section_anyway_with_flags (abfd, ".dynstr", |
302 | flags | SEC_READONLY); | |
3496cb2a | 303 | if (s == NULL) |
45d6a902 AM |
304 | return FALSE; |
305 | ||
14b2f831 | 306 | s = bfd_make_section_anyway_with_flags (abfd, ".dynamic", flags); |
45d6a902 | 307 | if (s == NULL |
45d6a902 AM |
308 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
309 | return FALSE; | |
310 | ||
311 | /* The special symbol _DYNAMIC is always set to the start of the | |
77cfaee6 AM |
312 | .dynamic section. We could set _DYNAMIC in a linker script, but we |
313 | only want to define it if we are, in fact, creating a .dynamic | |
314 | section. We don't want to define it if there is no .dynamic | |
315 | section, since on some ELF platforms the start up code examines it | |
316 | to decide how to initialize the process. */ | |
9637f6ef L |
317 | h = _bfd_elf_define_linkage_sym (abfd, info, s, "_DYNAMIC"); |
318 | elf_hash_table (info)->hdynamic = h; | |
319 | if (h == NULL) | |
45d6a902 AM |
320 | return FALSE; |
321 | ||
fdc90cb4 JJ |
322 | if (info->emit_hash) |
323 | { | |
14b2f831 AM |
324 | s = bfd_make_section_anyway_with_flags (abfd, ".hash", |
325 | flags | SEC_READONLY); | |
fdc90cb4 JJ |
326 | if (s == NULL |
327 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
328 | return FALSE; | |
329 | elf_section_data (s)->this_hdr.sh_entsize = bed->s->sizeof_hash_entry; | |
330 | } | |
331 | ||
332 | if (info->emit_gnu_hash) | |
333 | { | |
14b2f831 AM |
334 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.hash", |
335 | flags | SEC_READONLY); | |
fdc90cb4 JJ |
336 | if (s == NULL |
337 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
338 | return FALSE; | |
339 | /* For 64-bit ELF, .gnu.hash is a non-uniform entity size section: | |
340 | 4 32-bit words followed by variable count of 64-bit words, then | |
341 | variable count of 32-bit words. */ | |
342 | if (bed->s->arch_size == 64) | |
343 | elf_section_data (s)->this_hdr.sh_entsize = 0; | |
344 | else | |
345 | elf_section_data (s)->this_hdr.sh_entsize = 4; | |
346 | } | |
45d6a902 AM |
347 | |
348 | /* Let the backend create the rest of the sections. This lets the | |
349 | backend set the right flags. The backend will normally create | |
350 | the .got and .plt sections. */ | |
894891db NC |
351 | if (bed->elf_backend_create_dynamic_sections == NULL |
352 | || ! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) | |
45d6a902 AM |
353 | return FALSE; |
354 | ||
355 | elf_hash_table (info)->dynamic_sections_created = TRUE; | |
356 | ||
357 | return TRUE; | |
358 | } | |
359 | ||
360 | /* Create dynamic sections when linking against a dynamic object. */ | |
361 | ||
362 | bfd_boolean | |
268b6b39 | 363 | _bfd_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
45d6a902 AM |
364 | { |
365 | flagword flags, pltflags; | |
7325306f | 366 | struct elf_link_hash_entry *h; |
45d6a902 | 367 | asection *s; |
9c5bfbb7 | 368 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 369 | struct elf_link_hash_table *htab = elf_hash_table (info); |
45d6a902 | 370 | |
252b5132 RH |
371 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
372 | .rel[a].bss sections. */ | |
e5a52504 | 373 | flags = bed->dynamic_sec_flags; |
252b5132 RH |
374 | |
375 | pltflags = flags; | |
252b5132 | 376 | if (bed->plt_not_loaded) |
6df4d94c MM |
377 | /* We do not clear SEC_ALLOC here because we still want the OS to |
378 | allocate space for the section; it's just that there's nothing | |
379 | to read in from the object file. */ | |
5d1634d7 | 380 | pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS); |
6df4d94c MM |
381 | else |
382 | pltflags |= SEC_ALLOC | SEC_CODE | SEC_LOAD; | |
252b5132 RH |
383 | if (bed->plt_readonly) |
384 | pltflags |= SEC_READONLY; | |
385 | ||
14b2f831 | 386 | s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); |
252b5132 | 387 | if (s == NULL |
252b5132 | 388 | || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) |
b34976b6 | 389 | return FALSE; |
6de2ae4a | 390 | htab->splt = s; |
252b5132 | 391 | |
d98685ac AM |
392 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
393 | .plt section. */ | |
7325306f RS |
394 | if (bed->want_plt_sym) |
395 | { | |
396 | h = _bfd_elf_define_linkage_sym (abfd, info, s, | |
397 | "_PROCEDURE_LINKAGE_TABLE_"); | |
398 | elf_hash_table (info)->hplt = h; | |
399 | if (h == NULL) | |
400 | return FALSE; | |
401 | } | |
252b5132 | 402 | |
14b2f831 AM |
403 | s = bfd_make_section_anyway_with_flags (abfd, |
404 | (bed->rela_plts_and_copies_p | |
405 | ? ".rela.plt" : ".rel.plt"), | |
406 | flags | SEC_READONLY); | |
252b5132 | 407 | if (s == NULL |
45d6a902 | 408 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
b34976b6 | 409 | return FALSE; |
6de2ae4a | 410 | htab->srelplt = s; |
252b5132 RH |
411 | |
412 | if (! _bfd_elf_create_got_section (abfd, info)) | |
b34976b6 | 413 | return FALSE; |
252b5132 | 414 | |
3018b441 RH |
415 | if (bed->want_dynbss) |
416 | { | |
417 | /* The .dynbss section is a place to put symbols which are defined | |
418 | by dynamic objects, are referenced by regular objects, and are | |
419 | not functions. We must allocate space for them in the process | |
420 | image and use a R_*_COPY reloc to tell the dynamic linker to | |
421 | initialize them at run time. The linker script puts the .dynbss | |
422 | section into the .bss section of the final image. */ | |
14b2f831 AM |
423 | s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", |
424 | (SEC_ALLOC | SEC_LINKER_CREATED)); | |
3496cb2a | 425 | if (s == NULL) |
b34976b6 | 426 | return FALSE; |
252b5132 | 427 | |
3018b441 | 428 | /* The .rel[a].bss section holds copy relocs. This section is not |
77cfaee6 AM |
429 | normally needed. We need to create it here, though, so that the |
430 | linker will map it to an output section. We can't just create it | |
431 | only if we need it, because we will not know whether we need it | |
432 | until we have seen all the input files, and the first time the | |
433 | main linker code calls BFD after examining all the input files | |
434 | (size_dynamic_sections) the input sections have already been | |
435 | mapped to the output sections. If the section turns out not to | |
436 | be needed, we can discard it later. We will never need this | |
437 | section when generating a shared object, since they do not use | |
438 | copy relocs. */ | |
0e1862bb | 439 | if (! bfd_link_pic (info)) |
3018b441 | 440 | { |
14b2f831 AM |
441 | s = bfd_make_section_anyway_with_flags (abfd, |
442 | (bed->rela_plts_and_copies_p | |
443 | ? ".rela.bss" : ".rel.bss"), | |
444 | flags | SEC_READONLY); | |
3018b441 | 445 | if (s == NULL |
45d6a902 | 446 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
b34976b6 | 447 | return FALSE; |
3018b441 | 448 | } |
252b5132 RH |
449 | } |
450 | ||
b34976b6 | 451 | return TRUE; |
252b5132 RH |
452 | } |
453 | \f | |
252b5132 RH |
454 | /* Record a new dynamic symbol. We record the dynamic symbols as we |
455 | read the input files, since we need to have a list of all of them | |
456 | before we can determine the final sizes of the output sections. | |
457 | Note that we may actually call this function even though we are not | |
458 | going to output any dynamic symbols; in some cases we know that a | |
459 | symbol should be in the dynamic symbol table, but only if there is | |
460 | one. */ | |
461 | ||
b34976b6 | 462 | bfd_boolean |
c152c796 AM |
463 | bfd_elf_link_record_dynamic_symbol (struct bfd_link_info *info, |
464 | struct elf_link_hash_entry *h) | |
252b5132 RH |
465 | { |
466 | if (h->dynindx == -1) | |
467 | { | |
2b0f7ef9 | 468 | struct elf_strtab_hash *dynstr; |
68b6ddd0 | 469 | char *p; |
252b5132 | 470 | const char *name; |
252b5132 RH |
471 | bfd_size_type indx; |
472 | ||
7a13edea NC |
473 | /* XXX: The ABI draft says the linker must turn hidden and |
474 | internal symbols into STB_LOCAL symbols when producing the | |
475 | DSO. However, if ld.so honors st_other in the dynamic table, | |
476 | this would not be necessary. */ | |
477 | switch (ELF_ST_VISIBILITY (h->other)) | |
478 | { | |
479 | case STV_INTERNAL: | |
480 | case STV_HIDDEN: | |
9d6eee78 L |
481 | if (h->root.type != bfd_link_hash_undefined |
482 | && h->root.type != bfd_link_hash_undefweak) | |
38048eb9 | 483 | { |
f5385ebf | 484 | h->forced_local = 1; |
67687978 PB |
485 | if (!elf_hash_table (info)->is_relocatable_executable) |
486 | return TRUE; | |
7a13edea | 487 | } |
0444bdd4 | 488 | |
7a13edea NC |
489 | default: |
490 | break; | |
491 | } | |
492 | ||
252b5132 RH |
493 | h->dynindx = elf_hash_table (info)->dynsymcount; |
494 | ++elf_hash_table (info)->dynsymcount; | |
495 | ||
496 | dynstr = elf_hash_table (info)->dynstr; | |
497 | if (dynstr == NULL) | |
498 | { | |
499 | /* Create a strtab to hold the dynamic symbol names. */ | |
2b0f7ef9 | 500 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); |
252b5132 | 501 | if (dynstr == NULL) |
b34976b6 | 502 | return FALSE; |
252b5132 RH |
503 | } |
504 | ||
505 | /* We don't put any version information in the dynamic string | |
aad5d350 | 506 | table. */ |
252b5132 RH |
507 | name = h->root.root.string; |
508 | p = strchr (name, ELF_VER_CHR); | |
68b6ddd0 AM |
509 | if (p != NULL) |
510 | /* We know that the p points into writable memory. In fact, | |
511 | there are only a few symbols that have read-only names, being | |
512 | those like _GLOBAL_OFFSET_TABLE_ that are created specially | |
513 | by the backends. Most symbols will have names pointing into | |
514 | an ELF string table read from a file, or to objalloc memory. */ | |
515 | *p = 0; | |
516 | ||
517 | indx = _bfd_elf_strtab_add (dynstr, name, p != NULL); | |
518 | ||
519 | if (p != NULL) | |
520 | *p = ELF_VER_CHR; | |
252b5132 RH |
521 | |
522 | if (indx == (bfd_size_type) -1) | |
b34976b6 | 523 | return FALSE; |
252b5132 RH |
524 | h->dynstr_index = indx; |
525 | } | |
526 | ||
b34976b6 | 527 | return TRUE; |
252b5132 | 528 | } |
45d6a902 | 529 | \f |
55255dae L |
530 | /* Mark a symbol dynamic. */ |
531 | ||
28caa186 | 532 | static void |
55255dae | 533 | bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info *info, |
40b36307 L |
534 | struct elf_link_hash_entry *h, |
535 | Elf_Internal_Sym *sym) | |
55255dae | 536 | { |
40b36307 | 537 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
55255dae | 538 | |
40b36307 | 539 | /* It may be called more than once on the same H. */ |
0e1862bb | 540 | if(h->dynamic || bfd_link_relocatable (info)) |
55255dae L |
541 | return; |
542 | ||
40b36307 L |
543 | if ((info->dynamic_data |
544 | && (h->type == STT_OBJECT | |
b8871f35 | 545 | || h->type == STT_COMMON |
40b36307 | 546 | || (sym != NULL |
b8871f35 L |
547 | && (ELF_ST_TYPE (sym->st_info) == STT_OBJECT |
548 | || ELF_ST_TYPE (sym->st_info) == STT_COMMON)))) | |
a0c8462f | 549 | || (d != NULL |
40b36307 L |
550 | && h->root.type == bfd_link_hash_new |
551 | && (*d->match) (&d->head, NULL, h->root.root.string))) | |
55255dae L |
552 | h->dynamic = 1; |
553 | } | |
554 | ||
45d6a902 AM |
555 | /* Record an assignment to a symbol made by a linker script. We need |
556 | this in case some dynamic object refers to this symbol. */ | |
557 | ||
558 | bfd_boolean | |
fe21a8fc L |
559 | bfd_elf_record_link_assignment (bfd *output_bfd, |
560 | struct bfd_link_info *info, | |
268b6b39 | 561 | const char *name, |
fe21a8fc L |
562 | bfd_boolean provide, |
563 | bfd_boolean hidden) | |
45d6a902 | 564 | { |
00cbee0a | 565 | struct elf_link_hash_entry *h, *hv; |
4ea42fb7 | 566 | struct elf_link_hash_table *htab; |
00cbee0a | 567 | const struct elf_backend_data *bed; |
45d6a902 | 568 | |
0eddce27 | 569 | if (!is_elf_hash_table (info->hash)) |
45d6a902 AM |
570 | return TRUE; |
571 | ||
4ea42fb7 AM |
572 | htab = elf_hash_table (info); |
573 | h = elf_link_hash_lookup (htab, name, !provide, TRUE, FALSE); | |
45d6a902 | 574 | if (h == NULL) |
4ea42fb7 | 575 | return provide; |
45d6a902 | 576 | |
0f550b3d L |
577 | if (h->versioned == unknown) |
578 | { | |
579 | /* Set versioned if symbol version is unknown. */ | |
580 | char *version = strrchr (name, ELF_VER_CHR); | |
581 | if (version) | |
582 | { | |
583 | if (version > name && version[-1] != ELF_VER_CHR) | |
584 | h->versioned = versioned_hidden; | |
585 | else | |
586 | h->versioned = versioned; | |
587 | } | |
588 | } | |
589 | ||
00cbee0a | 590 | switch (h->root.type) |
77cfaee6 | 591 | { |
00cbee0a L |
592 | case bfd_link_hash_defined: |
593 | case bfd_link_hash_defweak: | |
594 | case bfd_link_hash_common: | |
595 | break; | |
596 | case bfd_link_hash_undefweak: | |
597 | case bfd_link_hash_undefined: | |
598 | /* Since we're defining the symbol, don't let it seem to have not | |
599 | been defined. record_dynamic_symbol and size_dynamic_sections | |
600 | may depend on this. */ | |
4ea42fb7 | 601 | h->root.type = bfd_link_hash_new; |
77cfaee6 AM |
602 | if (h->root.u.undef.next != NULL || htab->root.undefs_tail == &h->root) |
603 | bfd_link_repair_undef_list (&htab->root); | |
00cbee0a L |
604 | break; |
605 | case bfd_link_hash_new: | |
40b36307 | 606 | bfd_elf_link_mark_dynamic_symbol (info, h, NULL); |
55255dae | 607 | h->non_elf = 0; |
00cbee0a L |
608 | break; |
609 | case bfd_link_hash_indirect: | |
610 | /* We had a versioned symbol in a dynamic library. We make the | |
a0c8462f | 611 | the versioned symbol point to this one. */ |
00cbee0a L |
612 | bed = get_elf_backend_data (output_bfd); |
613 | hv = h; | |
614 | while (hv->root.type == bfd_link_hash_indirect | |
615 | || hv->root.type == bfd_link_hash_warning) | |
616 | hv = (struct elf_link_hash_entry *) hv->root.u.i.link; | |
617 | /* We don't need to update h->root.u since linker will set them | |
618 | later. */ | |
619 | h->root.type = bfd_link_hash_undefined; | |
620 | hv->root.type = bfd_link_hash_indirect; | |
621 | hv->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
622 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hv); | |
623 | break; | |
624 | case bfd_link_hash_warning: | |
625 | abort (); | |
626 | break; | |
55255dae | 627 | } |
45d6a902 AM |
628 | |
629 | /* If this symbol is being provided by the linker script, and it is | |
630 | currently defined by a dynamic object, but not by a regular | |
631 | object, then mark it as undefined so that the generic linker will | |
632 | force the correct value. */ | |
633 | if (provide | |
f5385ebf AM |
634 | && h->def_dynamic |
635 | && !h->def_regular) | |
45d6a902 AM |
636 | h->root.type = bfd_link_hash_undefined; |
637 | ||
638 | /* If this symbol is not being provided by the linker script, and it is | |
639 | currently defined by a dynamic object, but not by a regular object, | |
640 | then clear out any version information because the symbol will not be | |
641 | associated with the dynamic object any more. */ | |
642 | if (!provide | |
f5385ebf AM |
643 | && h->def_dynamic |
644 | && !h->def_regular) | |
45d6a902 AM |
645 | h->verinfo.verdef = NULL; |
646 | ||
f5385ebf | 647 | h->def_regular = 1; |
45d6a902 | 648 | |
eb8476a6 | 649 | if (hidden) |
fe21a8fc | 650 | { |
91d6fa6a | 651 | bed = get_elf_backend_data (output_bfd); |
b8297068 AM |
652 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
653 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
fe21a8fc L |
654 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
655 | } | |
656 | ||
6fa3860b PB |
657 | /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects |
658 | and executables. */ | |
0e1862bb | 659 | if (!bfd_link_relocatable (info) |
6fa3860b PB |
660 | && h->dynindx != -1 |
661 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
662 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) | |
663 | h->forced_local = 1; | |
664 | ||
f5385ebf AM |
665 | if ((h->def_dynamic |
666 | || h->ref_dynamic | |
6b3b0ab8 L |
667 | || bfd_link_dll (info) |
668 | || elf_hash_table (info)->is_relocatable_executable) | |
45d6a902 AM |
669 | && h->dynindx == -1) |
670 | { | |
c152c796 | 671 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
45d6a902 AM |
672 | return FALSE; |
673 | ||
674 | /* If this is a weak defined symbol, and we know a corresponding | |
675 | real symbol from the same dynamic object, make sure the real | |
676 | symbol is also made into a dynamic symbol. */ | |
f6e332e6 AM |
677 | if (h->u.weakdef != NULL |
678 | && h->u.weakdef->dynindx == -1) | |
45d6a902 | 679 | { |
f6e332e6 | 680 | if (! bfd_elf_link_record_dynamic_symbol (info, h->u.weakdef)) |
45d6a902 AM |
681 | return FALSE; |
682 | } | |
683 | } | |
684 | ||
685 | return TRUE; | |
686 | } | |
42751cf3 | 687 | |
8c58d23b AM |
688 | /* Record a new local dynamic symbol. Returns 0 on failure, 1 on |
689 | success, and 2 on a failure caused by attempting to record a symbol | |
690 | in a discarded section, eg. a discarded link-once section symbol. */ | |
691 | ||
692 | int | |
c152c796 AM |
693 | bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info *info, |
694 | bfd *input_bfd, | |
695 | long input_indx) | |
8c58d23b AM |
696 | { |
697 | bfd_size_type amt; | |
698 | struct elf_link_local_dynamic_entry *entry; | |
699 | struct elf_link_hash_table *eht; | |
700 | struct elf_strtab_hash *dynstr; | |
701 | unsigned long dynstr_index; | |
702 | char *name; | |
703 | Elf_External_Sym_Shndx eshndx; | |
704 | char esym[sizeof (Elf64_External_Sym)]; | |
705 | ||
0eddce27 | 706 | if (! is_elf_hash_table (info->hash)) |
8c58d23b AM |
707 | return 0; |
708 | ||
709 | /* See if the entry exists already. */ | |
710 | for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next) | |
711 | if (entry->input_bfd == input_bfd && entry->input_indx == input_indx) | |
712 | return 1; | |
713 | ||
714 | amt = sizeof (*entry); | |
a50b1753 | 715 | entry = (struct elf_link_local_dynamic_entry *) bfd_alloc (input_bfd, amt); |
8c58d23b AM |
716 | if (entry == NULL) |
717 | return 0; | |
718 | ||
719 | /* Go find the symbol, so that we can find it's name. */ | |
720 | if (!bfd_elf_get_elf_syms (input_bfd, &elf_tdata (input_bfd)->symtab_hdr, | |
268b6b39 | 721 | 1, input_indx, &entry->isym, esym, &eshndx)) |
8c58d23b AM |
722 | { |
723 | bfd_release (input_bfd, entry); | |
724 | return 0; | |
725 | } | |
726 | ||
727 | if (entry->isym.st_shndx != SHN_UNDEF | |
4fbb74a6 | 728 | && entry->isym.st_shndx < SHN_LORESERVE) |
8c58d23b AM |
729 | { |
730 | asection *s; | |
731 | ||
732 | s = bfd_section_from_elf_index (input_bfd, entry->isym.st_shndx); | |
733 | if (s == NULL || bfd_is_abs_section (s->output_section)) | |
734 | { | |
735 | /* We can still bfd_release here as nothing has done another | |
736 | bfd_alloc. We can't do this later in this function. */ | |
737 | bfd_release (input_bfd, entry); | |
738 | return 2; | |
739 | } | |
740 | } | |
741 | ||
742 | name = (bfd_elf_string_from_elf_section | |
743 | (input_bfd, elf_tdata (input_bfd)->symtab_hdr.sh_link, | |
744 | entry->isym.st_name)); | |
745 | ||
746 | dynstr = elf_hash_table (info)->dynstr; | |
747 | if (dynstr == NULL) | |
748 | { | |
749 | /* Create a strtab to hold the dynamic symbol names. */ | |
750 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); | |
751 | if (dynstr == NULL) | |
752 | return 0; | |
753 | } | |
754 | ||
b34976b6 | 755 | dynstr_index = _bfd_elf_strtab_add (dynstr, name, FALSE); |
8c58d23b AM |
756 | if (dynstr_index == (unsigned long) -1) |
757 | return 0; | |
758 | entry->isym.st_name = dynstr_index; | |
759 | ||
760 | eht = elf_hash_table (info); | |
761 | ||
762 | entry->next = eht->dynlocal; | |
763 | eht->dynlocal = entry; | |
764 | entry->input_bfd = input_bfd; | |
765 | entry->input_indx = input_indx; | |
766 | eht->dynsymcount++; | |
767 | ||
768 | /* Whatever binding the symbol had before, it's now local. */ | |
769 | entry->isym.st_info | |
770 | = ELF_ST_INFO (STB_LOCAL, ELF_ST_TYPE (entry->isym.st_info)); | |
771 | ||
772 | /* The dynindx will be set at the end of size_dynamic_sections. */ | |
773 | ||
774 | return 1; | |
775 | } | |
776 | ||
30b30c21 | 777 | /* Return the dynindex of a local dynamic symbol. */ |
42751cf3 | 778 | |
30b30c21 | 779 | long |
268b6b39 AM |
780 | _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info *info, |
781 | bfd *input_bfd, | |
782 | long input_indx) | |
30b30c21 RH |
783 | { |
784 | struct elf_link_local_dynamic_entry *e; | |
785 | ||
786 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
787 | if (e->input_bfd == input_bfd && e->input_indx == input_indx) | |
788 | return e->dynindx; | |
789 | return -1; | |
790 | } | |
791 | ||
792 | /* This function is used to renumber the dynamic symbols, if some of | |
793 | them are removed because they are marked as local. This is called | |
794 | via elf_link_hash_traverse. */ | |
795 | ||
b34976b6 | 796 | static bfd_boolean |
268b6b39 AM |
797 | elf_link_renumber_hash_table_dynsyms (struct elf_link_hash_entry *h, |
798 | void *data) | |
42751cf3 | 799 | { |
a50b1753 | 800 | size_t *count = (size_t *) data; |
30b30c21 | 801 | |
6fa3860b PB |
802 | if (h->forced_local) |
803 | return TRUE; | |
804 | ||
805 | if (h->dynindx != -1) | |
806 | h->dynindx = ++(*count); | |
807 | ||
808 | return TRUE; | |
809 | } | |
810 | ||
811 | ||
812 | /* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with | |
813 | STB_LOCAL binding. */ | |
814 | ||
815 | static bfd_boolean | |
816 | elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry *h, | |
817 | void *data) | |
818 | { | |
a50b1753 | 819 | size_t *count = (size_t *) data; |
6fa3860b | 820 | |
6fa3860b PB |
821 | if (!h->forced_local) |
822 | return TRUE; | |
823 | ||
42751cf3 | 824 | if (h->dynindx != -1) |
30b30c21 RH |
825 | h->dynindx = ++(*count); |
826 | ||
b34976b6 | 827 | return TRUE; |
42751cf3 | 828 | } |
30b30c21 | 829 | |
aee6f5b4 AO |
830 | /* Return true if the dynamic symbol for a given section should be |
831 | omitted when creating a shared library. */ | |
832 | bfd_boolean | |
833 | _bfd_elf_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED, | |
834 | struct bfd_link_info *info, | |
835 | asection *p) | |
836 | { | |
74541ad4 | 837 | struct elf_link_hash_table *htab; |
ca55926c | 838 | asection *ip; |
74541ad4 | 839 | |
aee6f5b4 AO |
840 | switch (elf_section_data (p)->this_hdr.sh_type) |
841 | { | |
842 | case SHT_PROGBITS: | |
843 | case SHT_NOBITS: | |
844 | /* If sh_type is yet undecided, assume it could be | |
845 | SHT_PROGBITS/SHT_NOBITS. */ | |
846 | case SHT_NULL: | |
74541ad4 AM |
847 | htab = elf_hash_table (info); |
848 | if (p == htab->tls_sec) | |
849 | return FALSE; | |
850 | ||
851 | if (htab->text_index_section != NULL) | |
852 | return p != htab->text_index_section && p != htab->data_index_section; | |
853 | ||
ca55926c | 854 | return (htab->dynobj != NULL |
3d4d4302 | 855 | && (ip = bfd_get_linker_section (htab->dynobj, p->name)) != NULL |
ca55926c | 856 | && ip->output_section == p); |
aee6f5b4 AO |
857 | |
858 | /* There shouldn't be section relative relocations | |
859 | against any other section. */ | |
860 | default: | |
861 | return TRUE; | |
862 | } | |
863 | } | |
864 | ||
062e2358 | 865 | /* Assign dynsym indices. In a shared library we generate a section |
6fa3860b PB |
866 | symbol for each output section, which come first. Next come symbols |
867 | which have been forced to local binding. Then all of the back-end | |
868 | allocated local dynamic syms, followed by the rest of the global | |
869 | symbols. */ | |
30b30c21 | 870 | |
554220db AM |
871 | static unsigned long |
872 | _bfd_elf_link_renumber_dynsyms (bfd *output_bfd, | |
873 | struct bfd_link_info *info, | |
874 | unsigned long *section_sym_count) | |
30b30c21 RH |
875 | { |
876 | unsigned long dynsymcount = 0; | |
877 | ||
0e1862bb L |
878 | if (bfd_link_pic (info) |
879 | || elf_hash_table (info)->is_relocatable_executable) | |
30b30c21 | 880 | { |
aee6f5b4 | 881 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
30b30c21 RH |
882 | asection *p; |
883 | for (p = output_bfd->sections; p ; p = p->next) | |
8c37241b | 884 | if ((p->flags & SEC_EXCLUDE) == 0 |
aee6f5b4 AO |
885 | && (p->flags & SEC_ALLOC) != 0 |
886 | && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p)) | |
887 | elf_section_data (p)->dynindx = ++dynsymcount; | |
74541ad4 AM |
888 | else |
889 | elf_section_data (p)->dynindx = 0; | |
30b30c21 | 890 | } |
554220db | 891 | *section_sym_count = dynsymcount; |
30b30c21 | 892 | |
6fa3860b PB |
893 | elf_link_hash_traverse (elf_hash_table (info), |
894 | elf_link_renumber_local_hash_table_dynsyms, | |
895 | &dynsymcount); | |
896 | ||
30b30c21 RH |
897 | if (elf_hash_table (info)->dynlocal) |
898 | { | |
899 | struct elf_link_local_dynamic_entry *p; | |
900 | for (p = elf_hash_table (info)->dynlocal; p ; p = p->next) | |
901 | p->dynindx = ++dynsymcount; | |
902 | } | |
903 | ||
904 | elf_link_hash_traverse (elf_hash_table (info), | |
905 | elf_link_renumber_hash_table_dynsyms, | |
906 | &dynsymcount); | |
907 | ||
d5486c43 L |
908 | /* There is an unused NULL entry at the head of the table which we |
909 | must account for in our count even if the table is empty since it | |
910 | is intended for the mandatory DT_SYMTAB tag (.dynsym section) in | |
911 | .dynamic section. */ | |
912 | dynsymcount++; | |
30b30c21 | 913 | |
ccabcbe5 AM |
914 | elf_hash_table (info)->dynsymcount = dynsymcount; |
915 | return dynsymcount; | |
30b30c21 | 916 | } |
252b5132 | 917 | |
54ac0771 L |
918 | /* Merge st_other field. */ |
919 | ||
920 | static void | |
921 | elf_merge_st_other (bfd *abfd, struct elf_link_hash_entry *h, | |
b8417128 | 922 | const Elf_Internal_Sym *isym, asection *sec, |
cd3416da | 923 | bfd_boolean definition, bfd_boolean dynamic) |
54ac0771 L |
924 | { |
925 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
926 | ||
927 | /* If st_other has a processor-specific meaning, specific | |
cd3416da | 928 | code might be needed here. */ |
54ac0771 L |
929 | if (bed->elf_backend_merge_symbol_attribute) |
930 | (*bed->elf_backend_merge_symbol_attribute) (h, isym, definition, | |
931 | dynamic); | |
932 | ||
cd3416da | 933 | if (!dynamic) |
54ac0771 | 934 | { |
cd3416da AM |
935 | unsigned symvis = ELF_ST_VISIBILITY (isym->st_other); |
936 | unsigned hvis = ELF_ST_VISIBILITY (h->other); | |
54ac0771 | 937 | |
cd3416da AM |
938 | /* Keep the most constraining visibility. Leave the remainder |
939 | of the st_other field to elf_backend_merge_symbol_attribute. */ | |
940 | if (symvis - 1 < hvis - 1) | |
941 | h->other = symvis | (h->other & ~ELF_ST_VISIBILITY (-1)); | |
54ac0771 | 942 | } |
b8417128 AM |
943 | else if (definition |
944 | && ELF_ST_VISIBILITY (isym->st_other) != STV_DEFAULT | |
945 | && (sec->flags & SEC_READONLY) == 0) | |
6cabe1ea | 946 | h->protected_def = 1; |
54ac0771 L |
947 | } |
948 | ||
4f3fedcf AM |
949 | /* This function is called when we want to merge a new symbol with an |
950 | existing symbol. It handles the various cases which arise when we | |
951 | find a definition in a dynamic object, or when there is already a | |
952 | definition in a dynamic object. The new symbol is described by | |
953 | NAME, SYM, PSEC, and PVALUE. We set SYM_HASH to the hash table | |
954 | entry. We set POLDBFD to the old symbol's BFD. We set POLD_WEAK | |
955 | if the old symbol was weak. We set POLD_ALIGNMENT to the alignment | |
956 | of an old common symbol. We set OVERRIDE if the old symbol is | |
957 | overriding a new definition. We set TYPE_CHANGE_OK if it is OK for | |
958 | the type to change. We set SIZE_CHANGE_OK if it is OK for the size | |
959 | to change. By OK to change, we mean that we shouldn't warn if the | |
960 | type or size does change. */ | |
45d6a902 | 961 | |
8a56bd02 | 962 | static bfd_boolean |
268b6b39 AM |
963 | _bfd_elf_merge_symbol (bfd *abfd, |
964 | struct bfd_link_info *info, | |
965 | const char *name, | |
966 | Elf_Internal_Sym *sym, | |
967 | asection **psec, | |
968 | bfd_vma *pvalue, | |
4f3fedcf AM |
969 | struct elf_link_hash_entry **sym_hash, |
970 | bfd **poldbfd, | |
37a9e49a | 971 | bfd_boolean *pold_weak, |
af44c138 | 972 | unsigned int *pold_alignment, |
268b6b39 AM |
973 | bfd_boolean *skip, |
974 | bfd_boolean *override, | |
975 | bfd_boolean *type_change_ok, | |
6e33951e L |
976 | bfd_boolean *size_change_ok, |
977 | bfd_boolean *matched) | |
252b5132 | 978 | { |
7479dfd4 | 979 | asection *sec, *oldsec; |
45d6a902 | 980 | struct elf_link_hash_entry *h; |
90c984fc | 981 | struct elf_link_hash_entry *hi; |
45d6a902 AM |
982 | struct elf_link_hash_entry *flip; |
983 | int bind; | |
984 | bfd *oldbfd; | |
985 | bfd_boolean newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon; | |
0a36a439 | 986 | bfd_boolean newweak, oldweak, newfunc, oldfunc; |
a4d8e49b | 987 | const struct elf_backend_data *bed; |
6e33951e | 988 | char *new_version; |
45d6a902 AM |
989 | |
990 | *skip = FALSE; | |
991 | *override = FALSE; | |
992 | ||
993 | sec = *psec; | |
994 | bind = ELF_ST_BIND (sym->st_info); | |
995 | ||
996 | if (! bfd_is_und_section (sec)) | |
997 | h = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, FALSE, FALSE); | |
998 | else | |
999 | h = ((struct elf_link_hash_entry *) | |
1000 | bfd_wrapped_link_hash_lookup (abfd, info, name, TRUE, FALSE, FALSE)); | |
1001 | if (h == NULL) | |
1002 | return FALSE; | |
1003 | *sym_hash = h; | |
252b5132 | 1004 | |
88ba32a0 L |
1005 | bed = get_elf_backend_data (abfd); |
1006 | ||
6e33951e | 1007 | /* NEW_VERSION is the symbol version of the new symbol. */ |
422f1182 | 1008 | if (h->versioned != unversioned) |
6e33951e | 1009 | { |
422f1182 L |
1010 | /* Symbol version is unknown or versioned. */ |
1011 | new_version = strrchr (name, ELF_VER_CHR); | |
1012 | if (new_version) | |
1013 | { | |
1014 | if (h->versioned == unknown) | |
1015 | { | |
1016 | if (new_version > name && new_version[-1] != ELF_VER_CHR) | |
1017 | h->versioned = versioned_hidden; | |
1018 | else | |
1019 | h->versioned = versioned; | |
1020 | } | |
1021 | new_version += 1; | |
1022 | if (new_version[0] == '\0') | |
1023 | new_version = NULL; | |
1024 | } | |
1025 | else | |
1026 | h->versioned = unversioned; | |
6e33951e | 1027 | } |
422f1182 L |
1028 | else |
1029 | new_version = NULL; | |
6e33951e | 1030 | |
90c984fc L |
1031 | /* For merging, we only care about real symbols. But we need to make |
1032 | sure that indirect symbol dynamic flags are updated. */ | |
1033 | hi = h; | |
45d6a902 AM |
1034 | while (h->root.type == bfd_link_hash_indirect |
1035 | || h->root.type == bfd_link_hash_warning) | |
1036 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1037 | ||
6e33951e L |
1038 | if (!*matched) |
1039 | { | |
1040 | if (hi == h || h->root.type == bfd_link_hash_new) | |
1041 | *matched = TRUE; | |
1042 | else | |
1043 | { | |
ae7683d2 | 1044 | /* OLD_HIDDEN is true if the existing symbol is only visible |
6e33951e | 1045 | to the symbol with the same symbol version. NEW_HIDDEN is |
ae7683d2 | 1046 | true if the new symbol is only visible to the symbol with |
6e33951e | 1047 | the same symbol version. */ |
422f1182 L |
1048 | bfd_boolean old_hidden = h->versioned == versioned_hidden; |
1049 | bfd_boolean new_hidden = hi->versioned == versioned_hidden; | |
6e33951e L |
1050 | if (!old_hidden && !new_hidden) |
1051 | /* The new symbol matches the existing symbol if both | |
1052 | aren't hidden. */ | |
1053 | *matched = TRUE; | |
1054 | else | |
1055 | { | |
1056 | /* OLD_VERSION is the symbol version of the existing | |
1057 | symbol. */ | |
422f1182 L |
1058 | char *old_version; |
1059 | ||
1060 | if (h->versioned >= versioned) | |
1061 | old_version = strrchr (h->root.root.string, | |
1062 | ELF_VER_CHR) + 1; | |
1063 | else | |
1064 | old_version = NULL; | |
6e33951e L |
1065 | |
1066 | /* The new symbol matches the existing symbol if they | |
1067 | have the same symbol version. */ | |
1068 | *matched = (old_version == new_version | |
1069 | || (old_version != NULL | |
1070 | && new_version != NULL | |
1071 | && strcmp (old_version, new_version) == 0)); | |
1072 | } | |
1073 | } | |
1074 | } | |
1075 | ||
934bce08 AM |
1076 | /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the |
1077 | existing symbol. */ | |
1078 | ||
1079 | oldbfd = NULL; | |
1080 | oldsec = NULL; | |
1081 | switch (h->root.type) | |
1082 | { | |
1083 | default: | |
1084 | break; | |
1085 | ||
1086 | case bfd_link_hash_undefined: | |
1087 | case bfd_link_hash_undefweak: | |
1088 | oldbfd = h->root.u.undef.abfd; | |
1089 | break; | |
1090 | ||
1091 | case bfd_link_hash_defined: | |
1092 | case bfd_link_hash_defweak: | |
1093 | oldbfd = h->root.u.def.section->owner; | |
1094 | oldsec = h->root.u.def.section; | |
1095 | break; | |
1096 | ||
1097 | case bfd_link_hash_common: | |
1098 | oldbfd = h->root.u.c.p->section->owner; | |
1099 | oldsec = h->root.u.c.p->section; | |
1100 | if (pold_alignment) | |
1101 | *pold_alignment = h->root.u.c.p->alignment_power; | |
1102 | break; | |
1103 | } | |
1104 | if (poldbfd && *poldbfd == NULL) | |
1105 | *poldbfd = oldbfd; | |
1106 | ||
1107 | /* Differentiate strong and weak symbols. */ | |
1108 | newweak = bind == STB_WEAK; | |
1109 | oldweak = (h->root.type == bfd_link_hash_defweak | |
1110 | || h->root.type == bfd_link_hash_undefweak); | |
1111 | if (pold_weak) | |
1112 | *pold_weak = oldweak; | |
1113 | ||
1114 | /* This code is for coping with dynamic objects, and is only useful | |
1115 | if we are doing an ELF link. */ | |
1116 | if (!(*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) | |
1117 | return TRUE; | |
1118 | ||
40b36307 | 1119 | /* We have to check it for every instance since the first few may be |
ee659f1f | 1120 | references and not all compilers emit symbol type for undefined |
40b36307 L |
1121 | symbols. */ |
1122 | bfd_elf_link_mark_dynamic_symbol (info, h, sym); | |
1123 | ||
ee659f1f AM |
1124 | /* NEWDYN and OLDDYN indicate whether the new or old symbol, |
1125 | respectively, is from a dynamic object. */ | |
1126 | ||
1127 | newdyn = (abfd->flags & DYNAMIC) != 0; | |
1128 | ||
1129 | /* ref_dynamic_nonweak and dynamic_def flags track actual undefined | |
1130 | syms and defined syms in dynamic libraries respectively. | |
1131 | ref_dynamic on the other hand can be set for a symbol defined in | |
1132 | a dynamic library, and def_dynamic may not be set; When the | |
1133 | definition in a dynamic lib is overridden by a definition in the | |
1134 | executable use of the symbol in the dynamic lib becomes a | |
1135 | reference to the executable symbol. */ | |
1136 | if (newdyn) | |
1137 | { | |
1138 | if (bfd_is_und_section (sec)) | |
1139 | { | |
1140 | if (bind != STB_WEAK) | |
1141 | { | |
1142 | h->ref_dynamic_nonweak = 1; | |
1143 | hi->ref_dynamic_nonweak = 1; | |
1144 | } | |
1145 | } | |
1146 | else | |
1147 | { | |
6e33951e L |
1148 | /* Update the existing symbol only if they match. */ |
1149 | if (*matched) | |
1150 | h->dynamic_def = 1; | |
ee659f1f AM |
1151 | hi->dynamic_def = 1; |
1152 | } | |
1153 | } | |
1154 | ||
45d6a902 AM |
1155 | /* If we just created the symbol, mark it as being an ELF symbol. |
1156 | Other than that, there is nothing to do--there is no merge issue | |
1157 | with a newly defined symbol--so we just return. */ | |
1158 | ||
1159 | if (h->root.type == bfd_link_hash_new) | |
252b5132 | 1160 | { |
f5385ebf | 1161 | h->non_elf = 0; |
45d6a902 AM |
1162 | return TRUE; |
1163 | } | |
252b5132 | 1164 | |
45d6a902 AM |
1165 | /* In cases involving weak versioned symbols, we may wind up trying |
1166 | to merge a symbol with itself. Catch that here, to avoid the | |
1167 | confusion that results if we try to override a symbol with | |
1168 | itself. The additional tests catch cases like | |
1169 | _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a | |
1170 | dynamic object, which we do want to handle here. */ | |
1171 | if (abfd == oldbfd | |
895fa45f | 1172 | && (newweak || oldweak) |
45d6a902 | 1173 | && ((abfd->flags & DYNAMIC) == 0 |
f5385ebf | 1174 | || !h->def_regular)) |
45d6a902 AM |
1175 | return TRUE; |
1176 | ||
707bba77 | 1177 | olddyn = FALSE; |
45d6a902 AM |
1178 | if (oldbfd != NULL) |
1179 | olddyn = (oldbfd->flags & DYNAMIC) != 0; | |
707bba77 | 1180 | else if (oldsec != NULL) |
45d6a902 | 1181 | { |
707bba77 | 1182 | /* This handles the special SHN_MIPS_{TEXT,DATA} section |
45d6a902 | 1183 | indices used by MIPS ELF. */ |
707bba77 | 1184 | olddyn = (oldsec->symbol->flags & BSF_DYNAMIC) != 0; |
45d6a902 | 1185 | } |
252b5132 | 1186 | |
45d6a902 AM |
1187 | /* NEWDEF and OLDDEF indicate whether the new or old symbol, |
1188 | respectively, appear to be a definition rather than reference. */ | |
1189 | ||
707bba77 | 1190 | newdef = !bfd_is_und_section (sec) && !bfd_is_com_section (sec); |
45d6a902 | 1191 | |
707bba77 AM |
1192 | olddef = (h->root.type != bfd_link_hash_undefined |
1193 | && h->root.type != bfd_link_hash_undefweak | |
202ac193 | 1194 | && h->root.type != bfd_link_hash_common); |
45d6a902 | 1195 | |
0a36a439 L |
1196 | /* NEWFUNC and OLDFUNC indicate whether the new or old symbol, |
1197 | respectively, appear to be a function. */ | |
1198 | ||
1199 | newfunc = (ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1200 | && bed->is_function_type (ELF_ST_TYPE (sym->st_info))); | |
1201 | ||
1202 | oldfunc = (h->type != STT_NOTYPE | |
1203 | && bed->is_function_type (h->type)); | |
1204 | ||
580a2b6e L |
1205 | /* When we try to create a default indirect symbol from the dynamic |
1206 | definition with the default version, we skip it if its type and | |
40101021 | 1207 | the type of existing regular definition mismatch. */ |
580a2b6e | 1208 | if (pold_alignment == NULL |
580a2b6e L |
1209 | && newdyn |
1210 | && newdef | |
1211 | && !olddyn | |
4584ec12 L |
1212 | && (((olddef || h->root.type == bfd_link_hash_common) |
1213 | && ELF_ST_TYPE (sym->st_info) != h->type | |
1214 | && ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1215 | && h->type != STT_NOTYPE | |
1216 | && !(newfunc && oldfunc)) | |
1217 | || (olddef | |
1218 | && ((h->type == STT_GNU_IFUNC) | |
1219 | != (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))))) | |
580a2b6e L |
1220 | { |
1221 | *skip = TRUE; | |
1222 | return TRUE; | |
1223 | } | |
1224 | ||
4c34aff8 AM |
1225 | /* Check TLS symbols. We don't check undefined symbols introduced |
1226 | by "ld -u" which have no type (and oldbfd NULL), and we don't | |
1227 | check symbols from plugins because they also have no type. */ | |
1228 | if (oldbfd != NULL | |
1229 | && (oldbfd->flags & BFD_PLUGIN) == 0 | |
1230 | && (abfd->flags & BFD_PLUGIN) == 0 | |
1231 | && ELF_ST_TYPE (sym->st_info) != h->type | |
1232 | && (ELF_ST_TYPE (sym->st_info) == STT_TLS || h->type == STT_TLS)) | |
7479dfd4 L |
1233 | { |
1234 | bfd *ntbfd, *tbfd; | |
1235 | bfd_boolean ntdef, tdef; | |
1236 | asection *ntsec, *tsec; | |
1237 | ||
1238 | if (h->type == STT_TLS) | |
1239 | { | |
3b36f7e6 | 1240 | ntbfd = abfd; |
7479dfd4 L |
1241 | ntsec = sec; |
1242 | ntdef = newdef; | |
1243 | tbfd = oldbfd; | |
1244 | tsec = oldsec; | |
1245 | tdef = olddef; | |
1246 | } | |
1247 | else | |
1248 | { | |
1249 | ntbfd = oldbfd; | |
1250 | ntsec = oldsec; | |
1251 | ntdef = olddef; | |
1252 | tbfd = abfd; | |
1253 | tsec = sec; | |
1254 | tdef = newdef; | |
1255 | } | |
1256 | ||
1257 | if (tdef && ntdef) | |
1258 | (*_bfd_error_handler) | |
191c0c42 AM |
1259 | (_("%s: TLS definition in %B section %A " |
1260 | "mismatches non-TLS definition in %B section %A"), | |
7479dfd4 L |
1261 | tbfd, tsec, ntbfd, ntsec, h->root.root.string); |
1262 | else if (!tdef && !ntdef) | |
1263 | (*_bfd_error_handler) | |
191c0c42 AM |
1264 | (_("%s: TLS reference in %B " |
1265 | "mismatches non-TLS reference in %B"), | |
7479dfd4 L |
1266 | tbfd, ntbfd, h->root.root.string); |
1267 | else if (tdef) | |
1268 | (*_bfd_error_handler) | |
191c0c42 AM |
1269 | (_("%s: TLS definition in %B section %A " |
1270 | "mismatches non-TLS reference in %B"), | |
7479dfd4 L |
1271 | tbfd, tsec, ntbfd, h->root.root.string); |
1272 | else | |
1273 | (*_bfd_error_handler) | |
191c0c42 AM |
1274 | (_("%s: TLS reference in %B " |
1275 | "mismatches non-TLS definition in %B section %A"), | |
7479dfd4 L |
1276 | tbfd, ntbfd, ntsec, h->root.root.string); |
1277 | ||
1278 | bfd_set_error (bfd_error_bad_value); | |
1279 | return FALSE; | |
1280 | } | |
1281 | ||
45d6a902 AM |
1282 | /* If the old symbol has non-default visibility, we ignore the new |
1283 | definition from a dynamic object. */ | |
1284 | if (newdyn | |
9c7a29a3 | 1285 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
45d6a902 AM |
1286 | && !bfd_is_und_section (sec)) |
1287 | { | |
1288 | *skip = TRUE; | |
1289 | /* Make sure this symbol is dynamic. */ | |
f5385ebf | 1290 | h->ref_dynamic = 1; |
90c984fc | 1291 | hi->ref_dynamic = 1; |
45d6a902 AM |
1292 | /* A protected symbol has external availability. Make sure it is |
1293 | recorded as dynamic. | |
1294 | ||
1295 | FIXME: Should we check type and size for protected symbol? */ | |
1296 | if (ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
c152c796 | 1297 | return bfd_elf_link_record_dynamic_symbol (info, h); |
45d6a902 AM |
1298 | else |
1299 | return TRUE; | |
1300 | } | |
1301 | else if (!newdyn | |
9c7a29a3 | 1302 | && ELF_ST_VISIBILITY (sym->st_other) != STV_DEFAULT |
f5385ebf | 1303 | && h->def_dynamic) |
45d6a902 AM |
1304 | { |
1305 | /* If the new symbol with non-default visibility comes from a | |
1306 | relocatable file and the old definition comes from a dynamic | |
1307 | object, we remove the old definition. */ | |
6c9b78e6 | 1308 | if (hi->root.type == bfd_link_hash_indirect) |
d2dee3b2 L |
1309 | { |
1310 | /* Handle the case where the old dynamic definition is | |
1311 | default versioned. We need to copy the symbol info from | |
1312 | the symbol with default version to the normal one if it | |
1313 | was referenced before. */ | |
1314 | if (h->ref_regular) | |
1315 | { | |
6c9b78e6 | 1316 | hi->root.type = h->root.type; |
d2dee3b2 | 1317 | h->root.type = bfd_link_hash_indirect; |
6c9b78e6 | 1318 | (*bed->elf_backend_copy_indirect_symbol) (info, hi, h); |
aed81c4e | 1319 | |
6c9b78e6 | 1320 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; |
aed81c4e | 1321 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
d2dee3b2 | 1322 | { |
aed81c4e MR |
1323 | /* If the new symbol is hidden or internal, completely undo |
1324 | any dynamic link state. */ | |
1325 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1326 | h->forced_local = 0; | |
1327 | h->ref_dynamic = 0; | |
d2dee3b2 L |
1328 | } |
1329 | else | |
aed81c4e MR |
1330 | h->ref_dynamic = 1; |
1331 | ||
1332 | h->def_dynamic = 0; | |
aed81c4e MR |
1333 | /* FIXME: Should we check type and size for protected symbol? */ |
1334 | h->size = 0; | |
1335 | h->type = 0; | |
1336 | ||
6c9b78e6 | 1337 | h = hi; |
d2dee3b2 L |
1338 | } |
1339 | else | |
6c9b78e6 | 1340 | h = hi; |
d2dee3b2 | 1341 | } |
1de1a317 | 1342 | |
f5eda473 AM |
1343 | /* If the old symbol was undefined before, then it will still be |
1344 | on the undefs list. If the new symbol is undefined or | |
1345 | common, we can't make it bfd_link_hash_new here, because new | |
1346 | undefined or common symbols will be added to the undefs list | |
1347 | by _bfd_generic_link_add_one_symbol. Symbols may not be | |
1348 | added twice to the undefs list. Also, if the new symbol is | |
1349 | undefweak then we don't want to lose the strong undef. */ | |
1350 | if (h->root.u.undef.next || info->hash->undefs_tail == &h->root) | |
1de1a317 | 1351 | { |
1de1a317 | 1352 | h->root.type = bfd_link_hash_undefined; |
1de1a317 L |
1353 | h->root.u.undef.abfd = abfd; |
1354 | } | |
1355 | else | |
1356 | { | |
1357 | h->root.type = bfd_link_hash_new; | |
1358 | h->root.u.undef.abfd = NULL; | |
1359 | } | |
1360 | ||
f5eda473 | 1361 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
252b5132 | 1362 | { |
f5eda473 AM |
1363 | /* If the new symbol is hidden or internal, completely undo |
1364 | any dynamic link state. */ | |
1365 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1366 | h->forced_local = 0; | |
1367 | h->ref_dynamic = 0; | |
45d6a902 | 1368 | } |
f5eda473 AM |
1369 | else |
1370 | h->ref_dynamic = 1; | |
1371 | h->def_dynamic = 0; | |
45d6a902 AM |
1372 | /* FIXME: Should we check type and size for protected symbol? */ |
1373 | h->size = 0; | |
1374 | h->type = 0; | |
1375 | return TRUE; | |
1376 | } | |
14a793b2 | 1377 | |
15b43f48 AM |
1378 | /* If a new weak symbol definition comes from a regular file and the |
1379 | old symbol comes from a dynamic library, we treat the new one as | |
1380 | strong. Similarly, an old weak symbol definition from a regular | |
1381 | file is treated as strong when the new symbol comes from a dynamic | |
1382 | library. Further, an old weak symbol from a dynamic library is | |
1383 | treated as strong if the new symbol is from a dynamic library. | |
1384 | This reflects the way glibc's ld.so works. | |
1385 | ||
1386 | Do this before setting *type_change_ok or *size_change_ok so that | |
1387 | we warn properly when dynamic library symbols are overridden. */ | |
1388 | ||
1389 | if (newdef && !newdyn && olddyn) | |
0f8a2703 | 1390 | newweak = FALSE; |
15b43f48 | 1391 | if (olddef && newdyn) |
0f8a2703 AM |
1392 | oldweak = FALSE; |
1393 | ||
d334575b | 1394 | /* Allow changes between different types of function symbol. */ |
0a36a439 | 1395 | if (newfunc && oldfunc) |
fcb93ecf PB |
1396 | *type_change_ok = TRUE; |
1397 | ||
79349b09 AM |
1398 | /* It's OK to change the type if either the existing symbol or the |
1399 | new symbol is weak. A type change is also OK if the old symbol | |
1400 | is undefined and the new symbol is defined. */ | |
252b5132 | 1401 | |
79349b09 AM |
1402 | if (oldweak |
1403 | || newweak | |
1404 | || (newdef | |
1405 | && h->root.type == bfd_link_hash_undefined)) | |
1406 | *type_change_ok = TRUE; | |
1407 | ||
1408 | /* It's OK to change the size if either the existing symbol or the | |
1409 | new symbol is weak, or if the old symbol is undefined. */ | |
1410 | ||
1411 | if (*type_change_ok | |
1412 | || h->root.type == bfd_link_hash_undefined) | |
1413 | *size_change_ok = TRUE; | |
45d6a902 | 1414 | |
45d6a902 AM |
1415 | /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old |
1416 | symbol, respectively, appears to be a common symbol in a dynamic | |
1417 | object. If a symbol appears in an uninitialized section, and is | |
1418 | not weak, and is not a function, then it may be a common symbol | |
1419 | which was resolved when the dynamic object was created. We want | |
1420 | to treat such symbols specially, because they raise special | |
1421 | considerations when setting the symbol size: if the symbol | |
1422 | appears as a common symbol in a regular object, and the size in | |
1423 | the regular object is larger, we must make sure that we use the | |
1424 | larger size. This problematic case can always be avoided in C, | |
1425 | but it must be handled correctly when using Fortran shared | |
1426 | libraries. | |
1427 | ||
1428 | Note that if NEWDYNCOMMON is set, NEWDEF will be set, and | |
1429 | likewise for OLDDYNCOMMON and OLDDEF. | |
1430 | ||
1431 | Note that this test is just a heuristic, and that it is quite | |
1432 | possible to have an uninitialized symbol in a shared object which | |
1433 | is really a definition, rather than a common symbol. This could | |
1434 | lead to some minor confusion when the symbol really is a common | |
1435 | symbol in some regular object. However, I think it will be | |
1436 | harmless. */ | |
1437 | ||
1438 | if (newdyn | |
1439 | && newdef | |
79349b09 | 1440 | && !newweak |
45d6a902 AM |
1441 | && (sec->flags & SEC_ALLOC) != 0 |
1442 | && (sec->flags & SEC_LOAD) == 0 | |
1443 | && sym->st_size > 0 | |
0a36a439 | 1444 | && !newfunc) |
45d6a902 AM |
1445 | newdyncommon = TRUE; |
1446 | else | |
1447 | newdyncommon = FALSE; | |
1448 | ||
1449 | if (olddyn | |
1450 | && olddef | |
1451 | && h->root.type == bfd_link_hash_defined | |
f5385ebf | 1452 | && h->def_dynamic |
45d6a902 AM |
1453 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 |
1454 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
1455 | && h->size > 0 | |
0a36a439 | 1456 | && !oldfunc) |
45d6a902 AM |
1457 | olddyncommon = TRUE; |
1458 | else | |
1459 | olddyncommon = FALSE; | |
1460 | ||
a4d8e49b L |
1461 | /* We now know everything about the old and new symbols. We ask the |
1462 | backend to check if we can merge them. */ | |
5d13b3b3 AM |
1463 | if (bed->merge_symbol != NULL) |
1464 | { | |
1465 | if (!bed->merge_symbol (h, sym, psec, newdef, olddef, oldbfd, oldsec)) | |
1466 | return FALSE; | |
1467 | sec = *psec; | |
1468 | } | |
a4d8e49b | 1469 | |
45d6a902 AM |
1470 | /* If both the old and the new symbols look like common symbols in a |
1471 | dynamic object, set the size of the symbol to the larger of the | |
1472 | two. */ | |
1473 | ||
1474 | if (olddyncommon | |
1475 | && newdyncommon | |
1476 | && sym->st_size != h->size) | |
1477 | { | |
1478 | /* Since we think we have two common symbols, issue a multiple | |
1479 | common warning if desired. Note that we only warn if the | |
1480 | size is different. If the size is the same, we simply let | |
1481 | the old symbol override the new one as normally happens with | |
1482 | symbols defined in dynamic objects. */ | |
1483 | ||
1a72702b AM |
1484 | (*info->callbacks->multiple_common) (info, &h->root, abfd, |
1485 | bfd_link_hash_common, sym->st_size); | |
45d6a902 AM |
1486 | if (sym->st_size > h->size) |
1487 | h->size = sym->st_size; | |
252b5132 | 1488 | |
45d6a902 | 1489 | *size_change_ok = TRUE; |
252b5132 RH |
1490 | } |
1491 | ||
45d6a902 AM |
1492 | /* If we are looking at a dynamic object, and we have found a |
1493 | definition, we need to see if the symbol was already defined by | |
1494 | some other object. If so, we want to use the existing | |
1495 | definition, and we do not want to report a multiple symbol | |
1496 | definition error; we do this by clobbering *PSEC to be | |
1497 | bfd_und_section_ptr. | |
1498 | ||
1499 | We treat a common symbol as a definition if the symbol in the | |
1500 | shared library is a function, since common symbols always | |
1501 | represent variables; this can cause confusion in principle, but | |
1502 | any such confusion would seem to indicate an erroneous program or | |
1503 | shared library. We also permit a common symbol in a regular | |
202ac193 L |
1504 | object to override a weak symbol in a shared object. A common |
1505 | symbol in executable also overrides a symbol in a shared object. */ | |
45d6a902 AM |
1506 | |
1507 | if (newdyn | |
1508 | && newdef | |
77cfaee6 | 1509 | && (olddef |
45d6a902 | 1510 | || (h->root.type == bfd_link_hash_common |
202ac193 L |
1511 | && (newweak |
1512 | || newfunc | |
1513 | || (!olddyn && bfd_link_executable (info)))))) | |
45d6a902 AM |
1514 | { |
1515 | *override = TRUE; | |
1516 | newdef = FALSE; | |
1517 | newdyncommon = FALSE; | |
252b5132 | 1518 | |
45d6a902 AM |
1519 | *psec = sec = bfd_und_section_ptr; |
1520 | *size_change_ok = TRUE; | |
252b5132 | 1521 | |
45d6a902 AM |
1522 | /* If we get here when the old symbol is a common symbol, then |
1523 | we are explicitly letting it override a weak symbol or | |
1524 | function in a dynamic object, and we don't want to warn about | |
1525 | a type change. If the old symbol is a defined symbol, a type | |
1526 | change warning may still be appropriate. */ | |
252b5132 | 1527 | |
45d6a902 AM |
1528 | if (h->root.type == bfd_link_hash_common) |
1529 | *type_change_ok = TRUE; | |
1530 | } | |
1531 | ||
1532 | /* Handle the special case of an old common symbol merging with a | |
1533 | new symbol which looks like a common symbol in a shared object. | |
1534 | We change *PSEC and *PVALUE to make the new symbol look like a | |
91134c82 L |
1535 | common symbol, and let _bfd_generic_link_add_one_symbol do the |
1536 | right thing. */ | |
45d6a902 AM |
1537 | |
1538 | if (newdyncommon | |
1539 | && h->root.type == bfd_link_hash_common) | |
1540 | { | |
1541 | *override = TRUE; | |
1542 | newdef = FALSE; | |
1543 | newdyncommon = FALSE; | |
1544 | *pvalue = sym->st_size; | |
a4d8e49b | 1545 | *psec = sec = bed->common_section (oldsec); |
45d6a902 AM |
1546 | *size_change_ok = TRUE; |
1547 | } | |
1548 | ||
c5e2cead | 1549 | /* Skip weak definitions of symbols that are already defined. */ |
f41d945b | 1550 | if (newdef && olddef && newweak) |
54ac0771 | 1551 | { |
35ed3f94 | 1552 | /* Don't skip new non-IR weak syms. */ |
3a5dbfb2 AM |
1553 | if (!(oldbfd != NULL |
1554 | && (oldbfd->flags & BFD_PLUGIN) != 0 | |
35ed3f94 | 1555 | && (abfd->flags & BFD_PLUGIN) == 0)) |
57fa7b8c AM |
1556 | { |
1557 | newdef = FALSE; | |
1558 | *skip = TRUE; | |
1559 | } | |
54ac0771 L |
1560 | |
1561 | /* Merge st_other. If the symbol already has a dynamic index, | |
1562 | but visibility says it should not be visible, turn it into a | |
1563 | local symbol. */ | |
b8417128 | 1564 | elf_merge_st_other (abfd, h, sym, sec, newdef, newdyn); |
54ac0771 L |
1565 | if (h->dynindx != -1) |
1566 | switch (ELF_ST_VISIBILITY (h->other)) | |
1567 | { | |
1568 | case STV_INTERNAL: | |
1569 | case STV_HIDDEN: | |
1570 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1571 | break; | |
1572 | } | |
1573 | } | |
c5e2cead | 1574 | |
45d6a902 AM |
1575 | /* If the old symbol is from a dynamic object, and the new symbol is |
1576 | a definition which is not from a dynamic object, then the new | |
1577 | symbol overrides the old symbol. Symbols from regular files | |
1578 | always take precedence over symbols from dynamic objects, even if | |
1579 | they are defined after the dynamic object in the link. | |
1580 | ||
1581 | As above, we again permit a common symbol in a regular object to | |
1582 | override a definition in a shared object if the shared object | |
0f8a2703 | 1583 | symbol is a function or is weak. */ |
45d6a902 AM |
1584 | |
1585 | flip = NULL; | |
77cfaee6 | 1586 | if (!newdyn |
45d6a902 AM |
1587 | && (newdef |
1588 | || (bfd_is_com_section (sec) | |
0a36a439 | 1589 | && (oldweak || oldfunc))) |
45d6a902 AM |
1590 | && olddyn |
1591 | && olddef | |
f5385ebf | 1592 | && h->def_dynamic) |
45d6a902 AM |
1593 | { |
1594 | /* Change the hash table entry to undefined, and let | |
1595 | _bfd_generic_link_add_one_symbol do the right thing with the | |
1596 | new definition. */ | |
1597 | ||
1598 | h->root.type = bfd_link_hash_undefined; | |
1599 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1600 | *size_change_ok = TRUE; | |
1601 | ||
1602 | olddef = FALSE; | |
1603 | olddyncommon = FALSE; | |
1604 | ||
1605 | /* We again permit a type change when a common symbol may be | |
1606 | overriding a function. */ | |
1607 | ||
1608 | if (bfd_is_com_section (sec)) | |
0a36a439 L |
1609 | { |
1610 | if (oldfunc) | |
1611 | { | |
1612 | /* If a common symbol overrides a function, make sure | |
1613 | that it isn't defined dynamically nor has type | |
1614 | function. */ | |
1615 | h->def_dynamic = 0; | |
1616 | h->type = STT_NOTYPE; | |
1617 | } | |
1618 | *type_change_ok = TRUE; | |
1619 | } | |
45d6a902 | 1620 | |
6c9b78e6 AM |
1621 | if (hi->root.type == bfd_link_hash_indirect) |
1622 | flip = hi; | |
45d6a902 AM |
1623 | else |
1624 | /* This union may have been set to be non-NULL when this symbol | |
1625 | was seen in a dynamic object. We must force the union to be | |
1626 | NULL, so that it is correct for a regular symbol. */ | |
1627 | h->verinfo.vertree = NULL; | |
1628 | } | |
1629 | ||
1630 | /* Handle the special case of a new common symbol merging with an | |
1631 | old symbol that looks like it might be a common symbol defined in | |
1632 | a shared object. Note that we have already handled the case in | |
1633 | which a new common symbol should simply override the definition | |
1634 | in the shared library. */ | |
1635 | ||
1636 | if (! newdyn | |
1637 | && bfd_is_com_section (sec) | |
1638 | && olddyncommon) | |
1639 | { | |
1640 | /* It would be best if we could set the hash table entry to a | |
1641 | common symbol, but we don't know what to use for the section | |
1642 | or the alignment. */ | |
1a72702b AM |
1643 | (*info->callbacks->multiple_common) (info, &h->root, abfd, |
1644 | bfd_link_hash_common, sym->st_size); | |
45d6a902 | 1645 | |
4cc11e76 | 1646 | /* If the presumed common symbol in the dynamic object is |
45d6a902 AM |
1647 | larger, pretend that the new symbol has its size. */ |
1648 | ||
1649 | if (h->size > *pvalue) | |
1650 | *pvalue = h->size; | |
1651 | ||
af44c138 L |
1652 | /* We need to remember the alignment required by the symbol |
1653 | in the dynamic object. */ | |
1654 | BFD_ASSERT (pold_alignment); | |
1655 | *pold_alignment = h->root.u.def.section->alignment_power; | |
45d6a902 AM |
1656 | |
1657 | olddef = FALSE; | |
1658 | olddyncommon = FALSE; | |
1659 | ||
1660 | h->root.type = bfd_link_hash_undefined; | |
1661 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1662 | ||
1663 | *size_change_ok = TRUE; | |
1664 | *type_change_ok = TRUE; | |
1665 | ||
6c9b78e6 AM |
1666 | if (hi->root.type == bfd_link_hash_indirect) |
1667 | flip = hi; | |
45d6a902 AM |
1668 | else |
1669 | h->verinfo.vertree = NULL; | |
1670 | } | |
1671 | ||
1672 | if (flip != NULL) | |
1673 | { | |
1674 | /* Handle the case where we had a versioned symbol in a dynamic | |
1675 | library and now find a definition in a normal object. In this | |
1676 | case, we make the versioned symbol point to the normal one. */ | |
45d6a902 | 1677 | flip->root.type = h->root.type; |
00cbee0a | 1678 | flip->root.u.undef.abfd = h->root.u.undef.abfd; |
45d6a902 AM |
1679 | h->root.type = bfd_link_hash_indirect; |
1680 | h->root.u.i.link = (struct bfd_link_hash_entry *) flip; | |
fcfa13d2 | 1681 | (*bed->elf_backend_copy_indirect_symbol) (info, flip, h); |
f5385ebf | 1682 | if (h->def_dynamic) |
45d6a902 | 1683 | { |
f5385ebf AM |
1684 | h->def_dynamic = 0; |
1685 | flip->ref_dynamic = 1; | |
45d6a902 AM |
1686 | } |
1687 | } | |
1688 | ||
45d6a902 AM |
1689 | return TRUE; |
1690 | } | |
1691 | ||
1692 | /* This function is called to create an indirect symbol from the | |
1693 | default for the symbol with the default version if needed. The | |
4f3fedcf | 1694 | symbol is described by H, NAME, SYM, SEC, and VALUE. We |
0f8a2703 | 1695 | set DYNSYM if the new indirect symbol is dynamic. */ |
45d6a902 | 1696 | |
28caa186 | 1697 | static bfd_boolean |
268b6b39 AM |
1698 | _bfd_elf_add_default_symbol (bfd *abfd, |
1699 | struct bfd_link_info *info, | |
1700 | struct elf_link_hash_entry *h, | |
1701 | const char *name, | |
1702 | Elf_Internal_Sym *sym, | |
4f3fedcf AM |
1703 | asection *sec, |
1704 | bfd_vma value, | |
1705 | bfd **poldbfd, | |
e3c9d234 | 1706 | bfd_boolean *dynsym) |
45d6a902 AM |
1707 | { |
1708 | bfd_boolean type_change_ok; | |
1709 | bfd_boolean size_change_ok; | |
1710 | bfd_boolean skip; | |
1711 | char *shortname; | |
1712 | struct elf_link_hash_entry *hi; | |
1713 | struct bfd_link_hash_entry *bh; | |
9c5bfbb7 | 1714 | const struct elf_backend_data *bed; |
45d6a902 AM |
1715 | bfd_boolean collect; |
1716 | bfd_boolean dynamic; | |
e3c9d234 | 1717 | bfd_boolean override; |
45d6a902 AM |
1718 | char *p; |
1719 | size_t len, shortlen; | |
ffd65175 | 1720 | asection *tmp_sec; |
6e33951e | 1721 | bfd_boolean matched; |
45d6a902 | 1722 | |
422f1182 L |
1723 | if (h->versioned == unversioned || h->versioned == versioned_hidden) |
1724 | return TRUE; | |
1725 | ||
45d6a902 AM |
1726 | /* If this symbol has a version, and it is the default version, we |
1727 | create an indirect symbol from the default name to the fully | |
1728 | decorated name. This will cause external references which do not | |
1729 | specify a version to be bound to this version of the symbol. */ | |
1730 | p = strchr (name, ELF_VER_CHR); | |
422f1182 L |
1731 | if (h->versioned == unknown) |
1732 | { | |
1733 | if (p == NULL) | |
1734 | { | |
1735 | h->versioned = unversioned; | |
1736 | return TRUE; | |
1737 | } | |
1738 | else | |
1739 | { | |
1740 | if (p[1] != ELF_VER_CHR) | |
1741 | { | |
1742 | h->versioned = versioned_hidden; | |
1743 | return TRUE; | |
1744 | } | |
1745 | else | |
1746 | h->versioned = versioned; | |
1747 | } | |
1748 | } | |
4373f8af L |
1749 | else |
1750 | { | |
1751 | /* PR ld/19073: We may see an unversioned definition after the | |
1752 | default version. */ | |
1753 | if (p == NULL) | |
1754 | return TRUE; | |
1755 | } | |
45d6a902 | 1756 | |
45d6a902 AM |
1757 | bed = get_elf_backend_data (abfd); |
1758 | collect = bed->collect; | |
1759 | dynamic = (abfd->flags & DYNAMIC) != 0; | |
1760 | ||
1761 | shortlen = p - name; | |
a50b1753 | 1762 | shortname = (char *) bfd_hash_allocate (&info->hash->table, shortlen + 1); |
45d6a902 AM |
1763 | if (shortname == NULL) |
1764 | return FALSE; | |
1765 | memcpy (shortname, name, shortlen); | |
1766 | shortname[shortlen] = '\0'; | |
1767 | ||
1768 | /* We are going to create a new symbol. Merge it with any existing | |
1769 | symbol with this name. For the purposes of the merge, act as | |
1770 | though we were defining the symbol we just defined, although we | |
1771 | actually going to define an indirect symbol. */ | |
1772 | type_change_ok = FALSE; | |
1773 | size_change_ok = FALSE; | |
6e33951e | 1774 | matched = TRUE; |
ffd65175 AM |
1775 | tmp_sec = sec; |
1776 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
4f3fedcf | 1777 | &hi, poldbfd, NULL, NULL, &skip, &override, |
6e33951e | 1778 | &type_change_ok, &size_change_ok, &matched)) |
45d6a902 AM |
1779 | return FALSE; |
1780 | ||
1781 | if (skip) | |
1782 | goto nondefault; | |
1783 | ||
1784 | if (! override) | |
1785 | { | |
c6e8a9a8 | 1786 | /* Add the default symbol if not performing a relocatable link. */ |
0e1862bb | 1787 | if (! bfd_link_relocatable (info)) |
c6e8a9a8 L |
1788 | { |
1789 | bh = &hi->root; | |
1790 | if (! (_bfd_generic_link_add_one_symbol | |
1791 | (info, abfd, shortname, BSF_INDIRECT, | |
1792 | bfd_ind_section_ptr, | |
1793 | 0, name, FALSE, collect, &bh))) | |
1794 | return FALSE; | |
1795 | hi = (struct elf_link_hash_entry *) bh; | |
1796 | } | |
45d6a902 AM |
1797 | } |
1798 | else | |
1799 | { | |
1800 | /* In this case the symbol named SHORTNAME is overriding the | |
1801 | indirect symbol we want to add. We were planning on making | |
1802 | SHORTNAME an indirect symbol referring to NAME. SHORTNAME | |
1803 | is the name without a version. NAME is the fully versioned | |
1804 | name, and it is the default version. | |
1805 | ||
1806 | Overriding means that we already saw a definition for the | |
1807 | symbol SHORTNAME in a regular object, and it is overriding | |
1808 | the symbol defined in the dynamic object. | |
1809 | ||
1810 | When this happens, we actually want to change NAME, the | |
1811 | symbol we just added, to refer to SHORTNAME. This will cause | |
1812 | references to NAME in the shared object to become references | |
1813 | to SHORTNAME in the regular object. This is what we expect | |
1814 | when we override a function in a shared object: that the | |
1815 | references in the shared object will be mapped to the | |
1816 | definition in the regular object. */ | |
1817 | ||
1818 | while (hi->root.type == bfd_link_hash_indirect | |
1819 | || hi->root.type == bfd_link_hash_warning) | |
1820 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1821 | ||
1822 | h->root.type = bfd_link_hash_indirect; | |
1823 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; | |
f5385ebf | 1824 | if (h->def_dynamic) |
45d6a902 | 1825 | { |
f5385ebf AM |
1826 | h->def_dynamic = 0; |
1827 | hi->ref_dynamic = 1; | |
1828 | if (hi->ref_regular | |
1829 | || hi->def_regular) | |
45d6a902 | 1830 | { |
c152c796 | 1831 | if (! bfd_elf_link_record_dynamic_symbol (info, hi)) |
45d6a902 AM |
1832 | return FALSE; |
1833 | } | |
1834 | } | |
1835 | ||
1836 | /* Now set HI to H, so that the following code will set the | |
1837 | other fields correctly. */ | |
1838 | hi = h; | |
1839 | } | |
1840 | ||
fab4a87f L |
1841 | /* Check if HI is a warning symbol. */ |
1842 | if (hi->root.type == bfd_link_hash_warning) | |
1843 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1844 | ||
45d6a902 AM |
1845 | /* If there is a duplicate definition somewhere, then HI may not |
1846 | point to an indirect symbol. We will have reported an error to | |
1847 | the user in that case. */ | |
1848 | ||
1849 | if (hi->root.type == bfd_link_hash_indirect) | |
1850 | { | |
1851 | struct elf_link_hash_entry *ht; | |
1852 | ||
45d6a902 | 1853 | ht = (struct elf_link_hash_entry *) hi->root.u.i.link; |
fcfa13d2 | 1854 | (*bed->elf_backend_copy_indirect_symbol) (info, ht, hi); |
45d6a902 | 1855 | |
68c88cd4 AM |
1856 | /* A reference to the SHORTNAME symbol from a dynamic library |
1857 | will be satisfied by the versioned symbol at runtime. In | |
1858 | effect, we have a reference to the versioned symbol. */ | |
1859 | ht->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; | |
1860 | hi->dynamic_def |= ht->dynamic_def; | |
1861 | ||
45d6a902 AM |
1862 | /* See if the new flags lead us to realize that the symbol must |
1863 | be dynamic. */ | |
1864 | if (! *dynsym) | |
1865 | { | |
1866 | if (! dynamic) | |
1867 | { | |
0e1862bb | 1868 | if (! bfd_link_executable (info) |
90c984fc | 1869 | || hi->def_dynamic |
f5385ebf | 1870 | || hi->ref_dynamic) |
45d6a902 AM |
1871 | *dynsym = TRUE; |
1872 | } | |
1873 | else | |
1874 | { | |
f5385ebf | 1875 | if (hi->ref_regular) |
45d6a902 AM |
1876 | *dynsym = TRUE; |
1877 | } | |
1878 | } | |
1879 | } | |
1880 | ||
1881 | /* We also need to define an indirection from the nondefault version | |
1882 | of the symbol. */ | |
1883 | ||
1884 | nondefault: | |
1885 | len = strlen (name); | |
a50b1753 | 1886 | shortname = (char *) bfd_hash_allocate (&info->hash->table, len); |
45d6a902 AM |
1887 | if (shortname == NULL) |
1888 | return FALSE; | |
1889 | memcpy (shortname, name, shortlen); | |
1890 | memcpy (shortname + shortlen, p + 1, len - shortlen); | |
1891 | ||
1892 | /* Once again, merge with any existing symbol. */ | |
1893 | type_change_ok = FALSE; | |
1894 | size_change_ok = FALSE; | |
ffd65175 AM |
1895 | tmp_sec = sec; |
1896 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
115c6d5c | 1897 | &hi, poldbfd, NULL, NULL, &skip, &override, |
6e33951e | 1898 | &type_change_ok, &size_change_ok, &matched)) |
45d6a902 AM |
1899 | return FALSE; |
1900 | ||
1901 | if (skip) | |
1902 | return TRUE; | |
1903 | ||
1904 | if (override) | |
1905 | { | |
1906 | /* Here SHORTNAME is a versioned name, so we don't expect to see | |
1907 | the type of override we do in the case above unless it is | |
4cc11e76 | 1908 | overridden by a versioned definition. */ |
45d6a902 AM |
1909 | if (hi->root.type != bfd_link_hash_defined |
1910 | && hi->root.type != bfd_link_hash_defweak) | |
1911 | (*_bfd_error_handler) | |
d003868e AM |
1912 | (_("%B: unexpected redefinition of indirect versioned symbol `%s'"), |
1913 | abfd, shortname); | |
45d6a902 AM |
1914 | } |
1915 | else | |
1916 | { | |
1917 | bh = &hi->root; | |
1918 | if (! (_bfd_generic_link_add_one_symbol | |
1919 | (info, abfd, shortname, BSF_INDIRECT, | |
268b6b39 | 1920 | bfd_ind_section_ptr, 0, name, FALSE, collect, &bh))) |
45d6a902 AM |
1921 | return FALSE; |
1922 | hi = (struct elf_link_hash_entry *) bh; | |
1923 | ||
1924 | /* If there is a duplicate definition somewhere, then HI may not | |
1925 | point to an indirect symbol. We will have reported an error | |
1926 | to the user in that case. */ | |
1927 | ||
1928 | if (hi->root.type == bfd_link_hash_indirect) | |
1929 | { | |
fcfa13d2 | 1930 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
68c88cd4 AM |
1931 | h->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; |
1932 | hi->dynamic_def |= h->dynamic_def; | |
45d6a902 AM |
1933 | |
1934 | /* See if the new flags lead us to realize that the symbol | |
1935 | must be dynamic. */ | |
1936 | if (! *dynsym) | |
1937 | { | |
1938 | if (! dynamic) | |
1939 | { | |
0e1862bb | 1940 | if (! bfd_link_executable (info) |
f5385ebf | 1941 | || hi->ref_dynamic) |
45d6a902 AM |
1942 | *dynsym = TRUE; |
1943 | } | |
1944 | else | |
1945 | { | |
f5385ebf | 1946 | if (hi->ref_regular) |
45d6a902 AM |
1947 | *dynsym = TRUE; |
1948 | } | |
1949 | } | |
1950 | } | |
1951 | } | |
1952 | ||
1953 | return TRUE; | |
1954 | } | |
1955 | \f | |
1956 | /* This routine is used to export all defined symbols into the dynamic | |
1957 | symbol table. It is called via elf_link_hash_traverse. */ | |
1958 | ||
28caa186 | 1959 | static bfd_boolean |
268b6b39 | 1960 | _bfd_elf_export_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 1961 | { |
a50b1753 | 1962 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 AM |
1963 | |
1964 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
1965 | if (h->root.type == bfd_link_hash_indirect) | |
1966 | return TRUE; | |
1967 | ||
7686d77d AM |
1968 | /* Ignore this if we won't export it. */ |
1969 | if (!eif->info->export_dynamic && !h->dynamic) | |
1970 | return TRUE; | |
45d6a902 AM |
1971 | |
1972 | if (h->dynindx == -1 | |
fd91d419 L |
1973 | && (h->def_regular || h->ref_regular) |
1974 | && ! bfd_hide_sym_by_version (eif->info->version_info, | |
1975 | h->root.root.string)) | |
45d6a902 | 1976 | { |
fd91d419 | 1977 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 | 1978 | { |
fd91d419 L |
1979 | eif->failed = TRUE; |
1980 | return FALSE; | |
45d6a902 AM |
1981 | } |
1982 | } | |
1983 | ||
1984 | return TRUE; | |
1985 | } | |
1986 | \f | |
1987 | /* Look through the symbols which are defined in other shared | |
1988 | libraries and referenced here. Update the list of version | |
1989 | dependencies. This will be put into the .gnu.version_r section. | |
1990 | This function is called via elf_link_hash_traverse. */ | |
1991 | ||
28caa186 | 1992 | static bfd_boolean |
268b6b39 AM |
1993 | _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry *h, |
1994 | void *data) | |
45d6a902 | 1995 | { |
a50b1753 | 1996 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; |
45d6a902 AM |
1997 | Elf_Internal_Verneed *t; |
1998 | Elf_Internal_Vernaux *a; | |
1999 | bfd_size_type amt; | |
2000 | ||
45d6a902 AM |
2001 | /* We only care about symbols defined in shared objects with version |
2002 | information. */ | |
f5385ebf AM |
2003 | if (!h->def_dynamic |
2004 | || h->def_regular | |
45d6a902 | 2005 | || h->dynindx == -1 |
7b20f099 AM |
2006 | || h->verinfo.verdef == NULL |
2007 | || (elf_dyn_lib_class (h->verinfo.verdef->vd_bfd) | |
2008 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | DYN_NO_NEEDED))) | |
45d6a902 AM |
2009 | return TRUE; |
2010 | ||
2011 | /* See if we already know about this version. */ | |
28caa186 AM |
2012 | for (t = elf_tdata (rinfo->info->output_bfd)->verref; |
2013 | t != NULL; | |
2014 | t = t->vn_nextref) | |
45d6a902 AM |
2015 | { |
2016 | if (t->vn_bfd != h->verinfo.verdef->vd_bfd) | |
2017 | continue; | |
2018 | ||
2019 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2020 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
2021 | return TRUE; | |
2022 | ||
2023 | break; | |
2024 | } | |
2025 | ||
2026 | /* This is a new version. Add it to tree we are building. */ | |
2027 | ||
2028 | if (t == NULL) | |
2029 | { | |
2030 | amt = sizeof *t; | |
a50b1753 | 2031 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->info->output_bfd, amt); |
45d6a902 AM |
2032 | if (t == NULL) |
2033 | { | |
2034 | rinfo->failed = TRUE; | |
2035 | return FALSE; | |
2036 | } | |
2037 | ||
2038 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
28caa186 AM |
2039 | t->vn_nextref = elf_tdata (rinfo->info->output_bfd)->verref; |
2040 | elf_tdata (rinfo->info->output_bfd)->verref = t; | |
45d6a902 AM |
2041 | } |
2042 | ||
2043 | amt = sizeof *a; | |
a50b1753 | 2044 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->info->output_bfd, amt); |
14b1c01e AM |
2045 | if (a == NULL) |
2046 | { | |
2047 | rinfo->failed = TRUE; | |
2048 | return FALSE; | |
2049 | } | |
45d6a902 AM |
2050 | |
2051 | /* Note that we are copying a string pointer here, and testing it | |
2052 | above. If bfd_elf_string_from_elf_section is ever changed to | |
2053 | discard the string data when low in memory, this will have to be | |
2054 | fixed. */ | |
2055 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
2056 | ||
2057 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
2058 | a->vna_nextptr = t->vn_auxptr; | |
2059 | ||
2060 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
2061 | ++rinfo->vers; | |
2062 | ||
2063 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
2064 | ||
2065 | t->vn_auxptr = a; | |
2066 | ||
2067 | return TRUE; | |
2068 | } | |
2069 | ||
2070 | /* Figure out appropriate versions for all the symbols. We may not | |
2071 | have the version number script until we have read all of the input | |
2072 | files, so until that point we don't know which symbols should be | |
2073 | local. This function is called via elf_link_hash_traverse. */ | |
2074 | ||
28caa186 | 2075 | static bfd_boolean |
268b6b39 | 2076 | _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2077 | { |
28caa186 | 2078 | struct elf_info_failed *sinfo; |
45d6a902 | 2079 | struct bfd_link_info *info; |
9c5bfbb7 | 2080 | const struct elf_backend_data *bed; |
45d6a902 AM |
2081 | struct elf_info_failed eif; |
2082 | char *p; | |
2083 | bfd_size_type amt; | |
2084 | ||
a50b1753 | 2085 | sinfo = (struct elf_info_failed *) data; |
45d6a902 AM |
2086 | info = sinfo->info; |
2087 | ||
45d6a902 AM |
2088 | /* Fix the symbol flags. */ |
2089 | eif.failed = FALSE; | |
2090 | eif.info = info; | |
2091 | if (! _bfd_elf_fix_symbol_flags (h, &eif)) | |
2092 | { | |
2093 | if (eif.failed) | |
2094 | sinfo->failed = TRUE; | |
2095 | return FALSE; | |
2096 | } | |
2097 | ||
2098 | /* We only need version numbers for symbols defined in regular | |
2099 | objects. */ | |
f5385ebf | 2100 | if (!h->def_regular) |
45d6a902 AM |
2101 | return TRUE; |
2102 | ||
28caa186 | 2103 | bed = get_elf_backend_data (info->output_bfd); |
45d6a902 AM |
2104 | p = strchr (h->root.root.string, ELF_VER_CHR); |
2105 | if (p != NULL && h->verinfo.vertree == NULL) | |
2106 | { | |
2107 | struct bfd_elf_version_tree *t; | |
45d6a902 | 2108 | |
45d6a902 AM |
2109 | ++p; |
2110 | if (*p == ELF_VER_CHR) | |
6e33951e | 2111 | ++p; |
45d6a902 AM |
2112 | |
2113 | /* If there is no version string, we can just return out. */ | |
2114 | if (*p == '\0') | |
6e33951e | 2115 | return TRUE; |
45d6a902 AM |
2116 | |
2117 | /* Look for the version. If we find it, it is no longer weak. */ | |
fd91d419 | 2118 | for (t = sinfo->info->version_info; t != NULL; t = t->next) |
45d6a902 AM |
2119 | { |
2120 | if (strcmp (t->name, p) == 0) | |
2121 | { | |
2122 | size_t len; | |
2123 | char *alc; | |
2124 | struct bfd_elf_version_expr *d; | |
2125 | ||
2126 | len = p - h->root.root.string; | |
a50b1753 | 2127 | alc = (char *) bfd_malloc (len); |
45d6a902 | 2128 | if (alc == NULL) |
14b1c01e AM |
2129 | { |
2130 | sinfo->failed = TRUE; | |
2131 | return FALSE; | |
2132 | } | |
45d6a902 AM |
2133 | memcpy (alc, h->root.root.string, len - 1); |
2134 | alc[len - 1] = '\0'; | |
2135 | if (alc[len - 2] == ELF_VER_CHR) | |
2136 | alc[len - 2] = '\0'; | |
2137 | ||
2138 | h->verinfo.vertree = t; | |
2139 | t->used = TRUE; | |
2140 | d = NULL; | |
2141 | ||
108ba305 JJ |
2142 | if (t->globals.list != NULL) |
2143 | d = (*t->match) (&t->globals, NULL, alc); | |
45d6a902 AM |
2144 | |
2145 | /* See if there is anything to force this symbol to | |
2146 | local scope. */ | |
108ba305 | 2147 | if (d == NULL && t->locals.list != NULL) |
45d6a902 | 2148 | { |
108ba305 JJ |
2149 | d = (*t->match) (&t->locals, NULL, alc); |
2150 | if (d != NULL | |
2151 | && h->dynindx != -1 | |
108ba305 JJ |
2152 | && ! info->export_dynamic) |
2153 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
45d6a902 AM |
2154 | } |
2155 | ||
2156 | free (alc); | |
2157 | break; | |
2158 | } | |
2159 | } | |
2160 | ||
2161 | /* If we are building an application, we need to create a | |
2162 | version node for this version. */ | |
0e1862bb | 2163 | if (t == NULL && bfd_link_executable (info)) |
45d6a902 AM |
2164 | { |
2165 | struct bfd_elf_version_tree **pp; | |
2166 | int version_index; | |
2167 | ||
2168 | /* If we aren't going to export this symbol, we don't need | |
2169 | to worry about it. */ | |
2170 | if (h->dynindx == -1) | |
2171 | return TRUE; | |
2172 | ||
2173 | amt = sizeof *t; | |
a50b1753 | 2174 | t = (struct bfd_elf_version_tree *) bfd_zalloc (info->output_bfd, amt); |
45d6a902 AM |
2175 | if (t == NULL) |
2176 | { | |
2177 | sinfo->failed = TRUE; | |
2178 | return FALSE; | |
2179 | } | |
2180 | ||
45d6a902 | 2181 | t->name = p; |
45d6a902 AM |
2182 | t->name_indx = (unsigned int) -1; |
2183 | t->used = TRUE; | |
2184 | ||
2185 | version_index = 1; | |
2186 | /* Don't count anonymous version tag. */ | |
fd91d419 L |
2187 | if (sinfo->info->version_info != NULL |
2188 | && sinfo->info->version_info->vernum == 0) | |
45d6a902 | 2189 | version_index = 0; |
fd91d419 L |
2190 | for (pp = &sinfo->info->version_info; |
2191 | *pp != NULL; | |
2192 | pp = &(*pp)->next) | |
45d6a902 AM |
2193 | ++version_index; |
2194 | t->vernum = version_index; | |
2195 | ||
2196 | *pp = t; | |
2197 | ||
2198 | h->verinfo.vertree = t; | |
2199 | } | |
2200 | else if (t == NULL) | |
2201 | { | |
2202 | /* We could not find the version for a symbol when | |
2203 | generating a shared archive. Return an error. */ | |
2204 | (*_bfd_error_handler) | |
c55fe096 | 2205 | (_("%B: version node not found for symbol %s"), |
28caa186 | 2206 | info->output_bfd, h->root.root.string); |
45d6a902 AM |
2207 | bfd_set_error (bfd_error_bad_value); |
2208 | sinfo->failed = TRUE; | |
2209 | return FALSE; | |
2210 | } | |
45d6a902 AM |
2211 | } |
2212 | ||
2213 | /* If we don't have a version for this symbol, see if we can find | |
2214 | something. */ | |
fd91d419 | 2215 | if (h->verinfo.vertree == NULL && sinfo->info->version_info != NULL) |
45d6a902 | 2216 | { |
1e8fa21e | 2217 | bfd_boolean hide; |
ae5a3597 | 2218 | |
fd91d419 L |
2219 | h->verinfo.vertree |
2220 | = bfd_find_version_for_sym (sinfo->info->version_info, | |
2221 | h->root.root.string, &hide); | |
1e8fa21e AM |
2222 | if (h->verinfo.vertree != NULL && hide) |
2223 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
45d6a902 AM |
2224 | } |
2225 | ||
2226 | return TRUE; | |
2227 | } | |
2228 | \f | |
45d6a902 AM |
2229 | /* Read and swap the relocs from the section indicated by SHDR. This |
2230 | may be either a REL or a RELA section. The relocations are | |
2231 | translated into RELA relocations and stored in INTERNAL_RELOCS, | |
2232 | which should have already been allocated to contain enough space. | |
2233 | The EXTERNAL_RELOCS are a buffer where the external form of the | |
2234 | relocations should be stored. | |
2235 | ||
2236 | Returns FALSE if something goes wrong. */ | |
2237 | ||
2238 | static bfd_boolean | |
268b6b39 | 2239 | elf_link_read_relocs_from_section (bfd *abfd, |
243ef1e0 | 2240 | asection *sec, |
268b6b39 AM |
2241 | Elf_Internal_Shdr *shdr, |
2242 | void *external_relocs, | |
2243 | Elf_Internal_Rela *internal_relocs) | |
45d6a902 | 2244 | { |
9c5bfbb7 | 2245 | const struct elf_backend_data *bed; |
268b6b39 | 2246 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
45d6a902 AM |
2247 | const bfd_byte *erela; |
2248 | const bfd_byte *erelaend; | |
2249 | Elf_Internal_Rela *irela; | |
243ef1e0 L |
2250 | Elf_Internal_Shdr *symtab_hdr; |
2251 | size_t nsyms; | |
45d6a902 | 2252 | |
45d6a902 AM |
2253 | /* Position ourselves at the start of the section. */ |
2254 | if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0) | |
2255 | return FALSE; | |
2256 | ||
2257 | /* Read the relocations. */ | |
2258 | if (bfd_bread (external_relocs, shdr->sh_size, abfd) != shdr->sh_size) | |
2259 | return FALSE; | |
2260 | ||
243ef1e0 | 2261 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
ce98a316 | 2262 | nsyms = NUM_SHDR_ENTRIES (symtab_hdr); |
243ef1e0 | 2263 | |
45d6a902 AM |
2264 | bed = get_elf_backend_data (abfd); |
2265 | ||
2266 | /* Convert the external relocations to the internal format. */ | |
2267 | if (shdr->sh_entsize == bed->s->sizeof_rel) | |
2268 | swap_in = bed->s->swap_reloc_in; | |
2269 | else if (shdr->sh_entsize == bed->s->sizeof_rela) | |
2270 | swap_in = bed->s->swap_reloca_in; | |
2271 | else | |
2272 | { | |
2273 | bfd_set_error (bfd_error_wrong_format); | |
2274 | return FALSE; | |
2275 | } | |
2276 | ||
a50b1753 | 2277 | erela = (const bfd_byte *) external_relocs; |
51992aec | 2278 | erelaend = erela + shdr->sh_size; |
45d6a902 AM |
2279 | irela = internal_relocs; |
2280 | while (erela < erelaend) | |
2281 | { | |
243ef1e0 L |
2282 | bfd_vma r_symndx; |
2283 | ||
45d6a902 | 2284 | (*swap_in) (abfd, erela, irela); |
243ef1e0 L |
2285 | r_symndx = ELF32_R_SYM (irela->r_info); |
2286 | if (bed->s->arch_size == 64) | |
2287 | r_symndx >>= 24; | |
ce98a316 NC |
2288 | if (nsyms > 0) |
2289 | { | |
2290 | if ((size_t) r_symndx >= nsyms) | |
2291 | { | |
2292 | (*_bfd_error_handler) | |
2293 | (_("%B: bad reloc symbol index (0x%lx >= 0x%lx)" | |
2294 | " for offset 0x%lx in section `%A'"), | |
2295 | abfd, sec, | |
2296 | (unsigned long) r_symndx, (unsigned long) nsyms, irela->r_offset); | |
2297 | bfd_set_error (bfd_error_bad_value); | |
2298 | return FALSE; | |
2299 | } | |
2300 | } | |
cf35638d | 2301 | else if (r_symndx != STN_UNDEF) |
243ef1e0 L |
2302 | { |
2303 | (*_bfd_error_handler) | |
ce98a316 NC |
2304 | (_("%B: non-zero symbol index (0x%lx) for offset 0x%lx in section `%A'" |
2305 | " when the object file has no symbol table"), | |
d003868e AM |
2306 | abfd, sec, |
2307 | (unsigned long) r_symndx, (unsigned long) nsyms, irela->r_offset); | |
243ef1e0 L |
2308 | bfd_set_error (bfd_error_bad_value); |
2309 | return FALSE; | |
2310 | } | |
45d6a902 AM |
2311 | irela += bed->s->int_rels_per_ext_rel; |
2312 | erela += shdr->sh_entsize; | |
2313 | } | |
2314 | ||
2315 | return TRUE; | |
2316 | } | |
2317 | ||
2318 | /* Read and swap the relocs for a section O. They may have been | |
2319 | cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are | |
2320 | not NULL, they are used as buffers to read into. They are known to | |
2321 | be large enough. If the INTERNAL_RELOCS relocs argument is NULL, | |
2322 | the return value is allocated using either malloc or bfd_alloc, | |
2323 | according to the KEEP_MEMORY argument. If O has two relocation | |
2324 | sections (both REL and RELA relocations), then the REL_HDR | |
2325 | relocations will appear first in INTERNAL_RELOCS, followed by the | |
d4730f92 | 2326 | RELA_HDR relocations. */ |
45d6a902 AM |
2327 | |
2328 | Elf_Internal_Rela * | |
268b6b39 AM |
2329 | _bfd_elf_link_read_relocs (bfd *abfd, |
2330 | asection *o, | |
2331 | void *external_relocs, | |
2332 | Elf_Internal_Rela *internal_relocs, | |
2333 | bfd_boolean keep_memory) | |
45d6a902 | 2334 | { |
268b6b39 | 2335 | void *alloc1 = NULL; |
45d6a902 | 2336 | Elf_Internal_Rela *alloc2 = NULL; |
9c5bfbb7 | 2337 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
d4730f92 BS |
2338 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
2339 | Elf_Internal_Rela *internal_rela_relocs; | |
45d6a902 | 2340 | |
d4730f92 BS |
2341 | if (esdo->relocs != NULL) |
2342 | return esdo->relocs; | |
45d6a902 AM |
2343 | |
2344 | if (o->reloc_count == 0) | |
2345 | return NULL; | |
2346 | ||
45d6a902 AM |
2347 | if (internal_relocs == NULL) |
2348 | { | |
2349 | bfd_size_type size; | |
2350 | ||
2351 | size = o->reloc_count; | |
2352 | size *= bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rela); | |
2353 | if (keep_memory) | |
a50b1753 | 2354 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_alloc (abfd, size); |
45d6a902 | 2355 | else |
a50b1753 | 2356 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); |
45d6a902 AM |
2357 | if (internal_relocs == NULL) |
2358 | goto error_return; | |
2359 | } | |
2360 | ||
2361 | if (external_relocs == NULL) | |
2362 | { | |
d4730f92 BS |
2363 | bfd_size_type size = 0; |
2364 | ||
2365 | if (esdo->rel.hdr) | |
2366 | size += esdo->rel.hdr->sh_size; | |
2367 | if (esdo->rela.hdr) | |
2368 | size += esdo->rela.hdr->sh_size; | |
45d6a902 | 2369 | |
268b6b39 | 2370 | alloc1 = bfd_malloc (size); |
45d6a902 AM |
2371 | if (alloc1 == NULL) |
2372 | goto error_return; | |
2373 | external_relocs = alloc1; | |
2374 | } | |
2375 | ||
d4730f92 BS |
2376 | internal_rela_relocs = internal_relocs; |
2377 | if (esdo->rel.hdr) | |
2378 | { | |
2379 | if (!elf_link_read_relocs_from_section (abfd, o, esdo->rel.hdr, | |
2380 | external_relocs, | |
2381 | internal_relocs)) | |
2382 | goto error_return; | |
2383 | external_relocs = (((bfd_byte *) external_relocs) | |
2384 | + esdo->rel.hdr->sh_size); | |
2385 | internal_rela_relocs += (NUM_SHDR_ENTRIES (esdo->rel.hdr) | |
2386 | * bed->s->int_rels_per_ext_rel); | |
2387 | } | |
2388 | ||
2389 | if (esdo->rela.hdr | |
2390 | && (!elf_link_read_relocs_from_section (abfd, o, esdo->rela.hdr, | |
2391 | external_relocs, | |
2392 | internal_rela_relocs))) | |
45d6a902 AM |
2393 | goto error_return; |
2394 | ||
2395 | /* Cache the results for next time, if we can. */ | |
2396 | if (keep_memory) | |
d4730f92 | 2397 | esdo->relocs = internal_relocs; |
45d6a902 AM |
2398 | |
2399 | if (alloc1 != NULL) | |
2400 | free (alloc1); | |
2401 | ||
2402 | /* Don't free alloc2, since if it was allocated we are passing it | |
2403 | back (under the name of internal_relocs). */ | |
2404 | ||
2405 | return internal_relocs; | |
2406 | ||
2407 | error_return: | |
2408 | if (alloc1 != NULL) | |
2409 | free (alloc1); | |
2410 | if (alloc2 != NULL) | |
4dd07732 AM |
2411 | { |
2412 | if (keep_memory) | |
2413 | bfd_release (abfd, alloc2); | |
2414 | else | |
2415 | free (alloc2); | |
2416 | } | |
45d6a902 AM |
2417 | return NULL; |
2418 | } | |
2419 | ||
2420 | /* Compute the size of, and allocate space for, REL_HDR which is the | |
2421 | section header for a section containing relocations for O. */ | |
2422 | ||
28caa186 | 2423 | static bfd_boolean |
268b6b39 | 2424 | _bfd_elf_link_size_reloc_section (bfd *abfd, |
d4730f92 | 2425 | struct bfd_elf_section_reloc_data *reldata) |
45d6a902 | 2426 | { |
d4730f92 | 2427 | Elf_Internal_Shdr *rel_hdr = reldata->hdr; |
45d6a902 AM |
2428 | |
2429 | /* That allows us to calculate the size of the section. */ | |
d4730f92 | 2430 | rel_hdr->sh_size = rel_hdr->sh_entsize * reldata->count; |
45d6a902 AM |
2431 | |
2432 | /* The contents field must last into write_object_contents, so we | |
2433 | allocate it with bfd_alloc rather than malloc. Also since we | |
2434 | cannot be sure that the contents will actually be filled in, | |
2435 | we zero the allocated space. */ | |
a50b1753 | 2436 | rel_hdr->contents = (unsigned char *) bfd_zalloc (abfd, rel_hdr->sh_size); |
45d6a902 AM |
2437 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) |
2438 | return FALSE; | |
2439 | ||
d4730f92 | 2440 | if (reldata->hashes == NULL && reldata->count) |
45d6a902 AM |
2441 | { |
2442 | struct elf_link_hash_entry **p; | |
2443 | ||
ca4be51c AM |
2444 | p = ((struct elf_link_hash_entry **) |
2445 | bfd_zmalloc (reldata->count * sizeof (*p))); | |
45d6a902 AM |
2446 | if (p == NULL) |
2447 | return FALSE; | |
2448 | ||
d4730f92 | 2449 | reldata->hashes = p; |
45d6a902 AM |
2450 | } |
2451 | ||
2452 | return TRUE; | |
2453 | } | |
2454 | ||
2455 | /* Copy the relocations indicated by the INTERNAL_RELOCS (which | |
2456 | originated from the section given by INPUT_REL_HDR) to the | |
2457 | OUTPUT_BFD. */ | |
2458 | ||
2459 | bfd_boolean | |
268b6b39 AM |
2460 | _bfd_elf_link_output_relocs (bfd *output_bfd, |
2461 | asection *input_section, | |
2462 | Elf_Internal_Shdr *input_rel_hdr, | |
eac338cf PB |
2463 | Elf_Internal_Rela *internal_relocs, |
2464 | struct elf_link_hash_entry **rel_hash | |
2465 | ATTRIBUTE_UNUSED) | |
45d6a902 AM |
2466 | { |
2467 | Elf_Internal_Rela *irela; | |
2468 | Elf_Internal_Rela *irelaend; | |
2469 | bfd_byte *erel; | |
d4730f92 | 2470 | struct bfd_elf_section_reloc_data *output_reldata; |
45d6a902 | 2471 | asection *output_section; |
9c5bfbb7 | 2472 | const struct elf_backend_data *bed; |
268b6b39 | 2473 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
d4730f92 | 2474 | struct bfd_elf_section_data *esdo; |
45d6a902 AM |
2475 | |
2476 | output_section = input_section->output_section; | |
45d6a902 | 2477 | |
d4730f92 BS |
2478 | bed = get_elf_backend_data (output_bfd); |
2479 | esdo = elf_section_data (output_section); | |
2480 | if (esdo->rel.hdr && esdo->rel.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2481 | { |
d4730f92 BS |
2482 | output_reldata = &esdo->rel; |
2483 | swap_out = bed->s->swap_reloc_out; | |
45d6a902 | 2484 | } |
d4730f92 BS |
2485 | else if (esdo->rela.hdr |
2486 | && esdo->rela.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2487 | { |
d4730f92 BS |
2488 | output_reldata = &esdo->rela; |
2489 | swap_out = bed->s->swap_reloca_out; | |
45d6a902 AM |
2490 | } |
2491 | else | |
2492 | { | |
2493 | (*_bfd_error_handler) | |
d003868e AM |
2494 | (_("%B: relocation size mismatch in %B section %A"), |
2495 | output_bfd, input_section->owner, input_section); | |
297d8443 | 2496 | bfd_set_error (bfd_error_wrong_format); |
45d6a902 AM |
2497 | return FALSE; |
2498 | } | |
2499 | ||
d4730f92 BS |
2500 | erel = output_reldata->hdr->contents; |
2501 | erel += output_reldata->count * input_rel_hdr->sh_entsize; | |
45d6a902 AM |
2502 | irela = internal_relocs; |
2503 | irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr) | |
2504 | * bed->s->int_rels_per_ext_rel); | |
2505 | while (irela < irelaend) | |
2506 | { | |
2507 | (*swap_out) (output_bfd, irela, erel); | |
2508 | irela += bed->s->int_rels_per_ext_rel; | |
2509 | erel += input_rel_hdr->sh_entsize; | |
2510 | } | |
2511 | ||
2512 | /* Bump the counter, so that we know where to add the next set of | |
2513 | relocations. */ | |
d4730f92 | 2514 | output_reldata->count += NUM_SHDR_ENTRIES (input_rel_hdr); |
45d6a902 AM |
2515 | |
2516 | return TRUE; | |
2517 | } | |
2518 | \f | |
508c3946 L |
2519 | /* Make weak undefined symbols in PIE dynamic. */ |
2520 | ||
2521 | bfd_boolean | |
2522 | _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info *info, | |
2523 | struct elf_link_hash_entry *h) | |
2524 | { | |
0e1862bb | 2525 | if (bfd_link_pie (info) |
508c3946 L |
2526 | && h->dynindx == -1 |
2527 | && h->root.type == bfd_link_hash_undefweak) | |
2528 | return bfd_elf_link_record_dynamic_symbol (info, h); | |
2529 | ||
2530 | return TRUE; | |
2531 | } | |
2532 | ||
45d6a902 AM |
2533 | /* Fix up the flags for a symbol. This handles various cases which |
2534 | can only be fixed after all the input files are seen. This is | |
2535 | currently called by both adjust_dynamic_symbol and | |
2536 | assign_sym_version, which is unnecessary but perhaps more robust in | |
2537 | the face of future changes. */ | |
2538 | ||
28caa186 | 2539 | static bfd_boolean |
268b6b39 AM |
2540 | _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry *h, |
2541 | struct elf_info_failed *eif) | |
45d6a902 | 2542 | { |
33774f08 | 2543 | const struct elf_backend_data *bed; |
508c3946 | 2544 | |
45d6a902 AM |
2545 | /* If this symbol was mentioned in a non-ELF file, try to set |
2546 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
2547 | permit a non-ELF file to correctly refer to a symbol defined in | |
2548 | an ELF dynamic object. */ | |
f5385ebf | 2549 | if (h->non_elf) |
45d6a902 AM |
2550 | { |
2551 | while (h->root.type == bfd_link_hash_indirect) | |
2552 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2553 | ||
2554 | if (h->root.type != bfd_link_hash_defined | |
2555 | && h->root.type != bfd_link_hash_defweak) | |
f5385ebf AM |
2556 | { |
2557 | h->ref_regular = 1; | |
2558 | h->ref_regular_nonweak = 1; | |
2559 | } | |
45d6a902 AM |
2560 | else |
2561 | { | |
2562 | if (h->root.u.def.section->owner != NULL | |
2563 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
2564 | == bfd_target_elf_flavour)) | |
f5385ebf AM |
2565 | { |
2566 | h->ref_regular = 1; | |
2567 | h->ref_regular_nonweak = 1; | |
2568 | } | |
45d6a902 | 2569 | else |
f5385ebf | 2570 | h->def_regular = 1; |
45d6a902 AM |
2571 | } |
2572 | ||
2573 | if (h->dynindx == -1 | |
f5385ebf AM |
2574 | && (h->def_dynamic |
2575 | || h->ref_dynamic)) | |
45d6a902 | 2576 | { |
c152c796 | 2577 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 AM |
2578 | { |
2579 | eif->failed = TRUE; | |
2580 | return FALSE; | |
2581 | } | |
2582 | } | |
2583 | } | |
2584 | else | |
2585 | { | |
f5385ebf | 2586 | /* Unfortunately, NON_ELF is only correct if the symbol |
45d6a902 AM |
2587 | was first seen in a non-ELF file. Fortunately, if the symbol |
2588 | was first seen in an ELF file, we're probably OK unless the | |
2589 | symbol was defined in a non-ELF file. Catch that case here. | |
2590 | FIXME: We're still in trouble if the symbol was first seen in | |
2591 | a dynamic object, and then later in a non-ELF regular object. */ | |
2592 | if ((h->root.type == bfd_link_hash_defined | |
2593 | || h->root.type == bfd_link_hash_defweak) | |
f5385ebf | 2594 | && !h->def_regular |
45d6a902 AM |
2595 | && (h->root.u.def.section->owner != NULL |
2596 | ? (bfd_get_flavour (h->root.u.def.section->owner) | |
2597 | != bfd_target_elf_flavour) | |
2598 | : (bfd_is_abs_section (h->root.u.def.section) | |
f5385ebf AM |
2599 | && !h->def_dynamic))) |
2600 | h->def_regular = 1; | |
45d6a902 AM |
2601 | } |
2602 | ||
508c3946 | 2603 | /* Backend specific symbol fixup. */ |
33774f08 AM |
2604 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); |
2605 | if (bed->elf_backend_fixup_symbol | |
2606 | && !(*bed->elf_backend_fixup_symbol) (eif->info, h)) | |
2607 | return FALSE; | |
508c3946 | 2608 | |
45d6a902 AM |
2609 | /* If this is a final link, and the symbol was defined as a common |
2610 | symbol in a regular object file, and there was no definition in | |
2611 | any dynamic object, then the linker will have allocated space for | |
f5385ebf | 2612 | the symbol in a common section but the DEF_REGULAR |
45d6a902 AM |
2613 | flag will not have been set. */ |
2614 | if (h->root.type == bfd_link_hash_defined | |
f5385ebf AM |
2615 | && !h->def_regular |
2616 | && h->ref_regular | |
2617 | && !h->def_dynamic | |
96f29d96 | 2618 | && (h->root.u.def.section->owner->flags & (DYNAMIC | BFD_PLUGIN)) == 0) |
f5385ebf | 2619 | h->def_regular = 1; |
45d6a902 AM |
2620 | |
2621 | /* If -Bsymbolic was used (which means to bind references to global | |
2622 | symbols to the definition within the shared object), and this | |
2623 | symbol was defined in a regular object, then it actually doesn't | |
9c7a29a3 AM |
2624 | need a PLT entry. Likewise, if the symbol has non-default |
2625 | visibility. If the symbol has hidden or internal visibility, we | |
c1be741f | 2626 | will force it local. */ |
f5385ebf | 2627 | if (h->needs_plt |
0e1862bb | 2628 | && bfd_link_pic (eif->info) |
0eddce27 | 2629 | && is_elf_hash_table (eif->info->hash) |
55255dae | 2630 | && (SYMBOLIC_BIND (eif->info, h) |
c1be741f | 2631 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
f5385ebf | 2632 | && h->def_regular) |
45d6a902 | 2633 | { |
45d6a902 AM |
2634 | bfd_boolean force_local; |
2635 | ||
45d6a902 AM |
2636 | force_local = (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL |
2637 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN); | |
2638 | (*bed->elf_backend_hide_symbol) (eif->info, h, force_local); | |
2639 | } | |
2640 | ||
2641 | /* If a weak undefined symbol has non-default visibility, we also | |
2642 | hide it from the dynamic linker. */ | |
9c7a29a3 | 2643 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
45d6a902 | 2644 | && h->root.type == bfd_link_hash_undefweak) |
33774f08 | 2645 | (*bed->elf_backend_hide_symbol) (eif->info, h, TRUE); |
45d6a902 AM |
2646 | |
2647 | /* If this is a weak defined symbol in a dynamic object, and we know | |
2648 | the real definition in the dynamic object, copy interesting flags | |
2649 | over to the real definition. */ | |
f6e332e6 | 2650 | if (h->u.weakdef != NULL) |
45d6a902 | 2651 | { |
45d6a902 AM |
2652 | /* If the real definition is defined by a regular object file, |
2653 | don't do anything special. See the longer description in | |
2654 | _bfd_elf_adjust_dynamic_symbol, below. */ | |
4e6b54a6 | 2655 | if (h->u.weakdef->def_regular) |
f6e332e6 | 2656 | h->u.weakdef = NULL; |
45d6a902 | 2657 | else |
a26587ba | 2658 | { |
4e6b54a6 AM |
2659 | struct elf_link_hash_entry *weakdef = h->u.weakdef; |
2660 | ||
2661 | while (h->root.type == bfd_link_hash_indirect) | |
2662 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2663 | ||
2664 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
2665 | || h->root.type == bfd_link_hash_defweak); | |
2666 | BFD_ASSERT (weakdef->def_dynamic); | |
a26587ba RS |
2667 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined |
2668 | || weakdef->root.type == bfd_link_hash_defweak); | |
2669 | (*bed->elf_backend_copy_indirect_symbol) (eif->info, weakdef, h); | |
2670 | } | |
45d6a902 AM |
2671 | } |
2672 | ||
2673 | return TRUE; | |
2674 | } | |
2675 | ||
2676 | /* Make the backend pick a good value for a dynamic symbol. This is | |
2677 | called via elf_link_hash_traverse, and also calls itself | |
2678 | recursively. */ | |
2679 | ||
28caa186 | 2680 | static bfd_boolean |
268b6b39 | 2681 | _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2682 | { |
a50b1753 | 2683 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 | 2684 | bfd *dynobj; |
9c5bfbb7 | 2685 | const struct elf_backend_data *bed; |
45d6a902 | 2686 | |
0eddce27 | 2687 | if (! is_elf_hash_table (eif->info->hash)) |
45d6a902 AM |
2688 | return FALSE; |
2689 | ||
45d6a902 AM |
2690 | /* Ignore indirect symbols. These are added by the versioning code. */ |
2691 | if (h->root.type == bfd_link_hash_indirect) | |
2692 | return TRUE; | |
2693 | ||
2694 | /* Fix the symbol flags. */ | |
2695 | if (! _bfd_elf_fix_symbol_flags (h, eif)) | |
2696 | return FALSE; | |
2697 | ||
2698 | /* If this symbol does not require a PLT entry, and it is not | |
2699 | defined by a dynamic object, or is not referenced by a regular | |
2700 | object, ignore it. We do have to handle a weak defined symbol, | |
2701 | even if no regular object refers to it, if we decided to add it | |
2702 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
2703 | about symbols which are defined by one dynamic object and | |
2704 | referenced by another one? */ | |
f5385ebf | 2705 | if (!h->needs_plt |
91e21fb7 | 2706 | && h->type != STT_GNU_IFUNC |
f5385ebf AM |
2707 | && (h->def_regular |
2708 | || !h->def_dynamic | |
2709 | || (!h->ref_regular | |
f6e332e6 | 2710 | && (h->u.weakdef == NULL || h->u.weakdef->dynindx == -1)))) |
45d6a902 | 2711 | { |
a6aa5195 | 2712 | h->plt = elf_hash_table (eif->info)->init_plt_offset; |
45d6a902 AM |
2713 | return TRUE; |
2714 | } | |
2715 | ||
2716 | /* If we've already adjusted this symbol, don't do it again. This | |
2717 | can happen via a recursive call. */ | |
f5385ebf | 2718 | if (h->dynamic_adjusted) |
45d6a902 AM |
2719 | return TRUE; |
2720 | ||
2721 | /* Don't look at this symbol again. Note that we must set this | |
2722 | after checking the above conditions, because we may look at a | |
2723 | symbol once, decide not to do anything, and then get called | |
2724 | recursively later after REF_REGULAR is set below. */ | |
f5385ebf | 2725 | h->dynamic_adjusted = 1; |
45d6a902 AM |
2726 | |
2727 | /* If this is a weak definition, and we know a real definition, and | |
2728 | the real symbol is not itself defined by a regular object file, | |
2729 | then get a good value for the real definition. We handle the | |
2730 | real symbol first, for the convenience of the backend routine. | |
2731 | ||
2732 | Note that there is a confusing case here. If the real definition | |
2733 | is defined by a regular object file, we don't get the real symbol | |
2734 | from the dynamic object, but we do get the weak symbol. If the | |
2735 | processor backend uses a COPY reloc, then if some routine in the | |
2736 | dynamic object changes the real symbol, we will not see that | |
2737 | change in the corresponding weak symbol. This is the way other | |
2738 | ELF linkers work as well, and seems to be a result of the shared | |
2739 | library model. | |
2740 | ||
2741 | I will clarify this issue. Most SVR4 shared libraries define the | |
2742 | variable _timezone and define timezone as a weak synonym. The | |
2743 | tzset call changes _timezone. If you write | |
2744 | extern int timezone; | |
2745 | int _timezone = 5; | |
2746 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
2747 | you might expect that, since timezone is a synonym for _timezone, | |
2748 | the same number will print both times. However, if the processor | |
2749 | backend uses a COPY reloc, then actually timezone will be copied | |
2750 | into your process image, and, since you define _timezone | |
2751 | yourself, _timezone will not. Thus timezone and _timezone will | |
2752 | wind up at different memory locations. The tzset call will set | |
2753 | _timezone, leaving timezone unchanged. */ | |
2754 | ||
f6e332e6 | 2755 | if (h->u.weakdef != NULL) |
45d6a902 | 2756 | { |
ec24dc88 AM |
2757 | /* If we get to this point, there is an implicit reference to |
2758 | H->U.WEAKDEF by a regular object file via the weak symbol H. */ | |
f6e332e6 | 2759 | h->u.weakdef->ref_regular = 1; |
45d6a902 | 2760 | |
ec24dc88 AM |
2761 | /* Ensure that the backend adjust_dynamic_symbol function sees |
2762 | H->U.WEAKDEF before H by recursively calling ourselves. */ | |
f6e332e6 | 2763 | if (! _bfd_elf_adjust_dynamic_symbol (h->u.weakdef, eif)) |
45d6a902 AM |
2764 | return FALSE; |
2765 | } | |
2766 | ||
2767 | /* If a symbol has no type and no size and does not require a PLT | |
2768 | entry, then we are probably about to do the wrong thing here: we | |
2769 | are probably going to create a COPY reloc for an empty object. | |
2770 | This case can arise when a shared object is built with assembly | |
2771 | code, and the assembly code fails to set the symbol type. */ | |
2772 | if (h->size == 0 | |
2773 | && h->type == STT_NOTYPE | |
f5385ebf | 2774 | && !h->needs_plt) |
45d6a902 AM |
2775 | (*_bfd_error_handler) |
2776 | (_("warning: type and size of dynamic symbol `%s' are not defined"), | |
2777 | h->root.root.string); | |
2778 | ||
2779 | dynobj = elf_hash_table (eif->info)->dynobj; | |
2780 | bed = get_elf_backend_data (dynobj); | |
e7c33416 | 2781 | |
45d6a902 AM |
2782 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) |
2783 | { | |
2784 | eif->failed = TRUE; | |
2785 | return FALSE; | |
2786 | } | |
2787 | ||
2788 | return TRUE; | |
2789 | } | |
2790 | ||
027297b7 L |
2791 | /* Adjust the dynamic symbol, H, for copy in the dynamic bss section, |
2792 | DYNBSS. */ | |
2793 | ||
2794 | bfd_boolean | |
6cabe1ea AM |
2795 | _bfd_elf_adjust_dynamic_copy (struct bfd_link_info *info, |
2796 | struct elf_link_hash_entry *h, | |
027297b7 L |
2797 | asection *dynbss) |
2798 | { | |
91ac5911 | 2799 | unsigned int power_of_two; |
027297b7 L |
2800 | bfd_vma mask; |
2801 | asection *sec = h->root.u.def.section; | |
2802 | ||
2803 | /* The section aligment of definition is the maximum alignment | |
91ac5911 L |
2804 | requirement of symbols defined in the section. Since we don't |
2805 | know the symbol alignment requirement, we start with the | |
2806 | maximum alignment and check low bits of the symbol address | |
2807 | for the minimum alignment. */ | |
2808 | power_of_two = bfd_get_section_alignment (sec->owner, sec); | |
2809 | mask = ((bfd_vma) 1 << power_of_two) - 1; | |
2810 | while ((h->root.u.def.value & mask) != 0) | |
2811 | { | |
2812 | mask >>= 1; | |
2813 | --power_of_two; | |
2814 | } | |
027297b7 | 2815 | |
91ac5911 L |
2816 | if (power_of_two > bfd_get_section_alignment (dynbss->owner, |
2817 | dynbss)) | |
027297b7 L |
2818 | { |
2819 | /* Adjust the section alignment if needed. */ | |
2820 | if (! bfd_set_section_alignment (dynbss->owner, dynbss, | |
91ac5911 | 2821 | power_of_two)) |
027297b7 L |
2822 | return FALSE; |
2823 | } | |
2824 | ||
91ac5911 | 2825 | /* We make sure that the symbol will be aligned properly. */ |
027297b7 L |
2826 | dynbss->size = BFD_ALIGN (dynbss->size, mask + 1); |
2827 | ||
2828 | /* Define the symbol as being at this point in DYNBSS. */ | |
2829 | h->root.u.def.section = dynbss; | |
2830 | h->root.u.def.value = dynbss->size; | |
2831 | ||
2832 | /* Increment the size of DYNBSS to make room for the symbol. */ | |
2833 | dynbss->size += h->size; | |
2834 | ||
f7483970 L |
2835 | /* No error if extern_protected_data is true. */ |
2836 | if (h->protected_def | |
889c2a67 L |
2837 | && (!info->extern_protected_data |
2838 | || (info->extern_protected_data < 0 | |
2839 | && !get_elf_backend_data (dynbss->owner)->extern_protected_data))) | |
d07a1b05 AM |
2840 | info->callbacks->einfo |
2841 | (_("%P: copy reloc against protected `%T' is dangerous\n"), | |
2842 | h->root.root.string); | |
6cabe1ea | 2843 | |
027297b7 L |
2844 | return TRUE; |
2845 | } | |
2846 | ||
45d6a902 AM |
2847 | /* Adjust all external symbols pointing into SEC_MERGE sections |
2848 | to reflect the object merging within the sections. */ | |
2849 | ||
28caa186 | 2850 | static bfd_boolean |
268b6b39 | 2851 | _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry *h, void *data) |
45d6a902 AM |
2852 | { |
2853 | asection *sec; | |
2854 | ||
45d6a902 AM |
2855 | if ((h->root.type == bfd_link_hash_defined |
2856 | || h->root.type == bfd_link_hash_defweak) | |
2857 | && ((sec = h->root.u.def.section)->flags & SEC_MERGE) | |
dbaa2011 | 2858 | && sec->sec_info_type == SEC_INFO_TYPE_MERGE) |
45d6a902 | 2859 | { |
a50b1753 | 2860 | bfd *output_bfd = (bfd *) data; |
45d6a902 AM |
2861 | |
2862 | h->root.u.def.value = | |
2863 | _bfd_merged_section_offset (output_bfd, | |
2864 | &h->root.u.def.section, | |
2865 | elf_section_data (sec)->sec_info, | |
753731ee | 2866 | h->root.u.def.value); |
45d6a902 AM |
2867 | } |
2868 | ||
2869 | return TRUE; | |
2870 | } | |
986a241f RH |
2871 | |
2872 | /* Returns false if the symbol referred to by H should be considered | |
2873 | to resolve local to the current module, and true if it should be | |
2874 | considered to bind dynamically. */ | |
2875 | ||
2876 | bfd_boolean | |
268b6b39 AM |
2877 | _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry *h, |
2878 | struct bfd_link_info *info, | |
89a2ee5a | 2879 | bfd_boolean not_local_protected) |
986a241f RH |
2880 | { |
2881 | bfd_boolean binding_stays_local_p; | |
fcb93ecf PB |
2882 | const struct elf_backend_data *bed; |
2883 | struct elf_link_hash_table *hash_table; | |
986a241f RH |
2884 | |
2885 | if (h == NULL) | |
2886 | return FALSE; | |
2887 | ||
2888 | while (h->root.type == bfd_link_hash_indirect | |
2889 | || h->root.type == bfd_link_hash_warning) | |
2890 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2891 | ||
2892 | /* If it was forced local, then clearly it's not dynamic. */ | |
2893 | if (h->dynindx == -1) | |
2894 | return FALSE; | |
f5385ebf | 2895 | if (h->forced_local) |
986a241f RH |
2896 | return FALSE; |
2897 | ||
2898 | /* Identify the cases where name binding rules say that a | |
2899 | visible symbol resolves locally. */ | |
0e1862bb L |
2900 | binding_stays_local_p = (bfd_link_executable (info) |
2901 | || SYMBOLIC_BIND (info, h)); | |
986a241f RH |
2902 | |
2903 | switch (ELF_ST_VISIBILITY (h->other)) | |
2904 | { | |
2905 | case STV_INTERNAL: | |
2906 | case STV_HIDDEN: | |
2907 | return FALSE; | |
2908 | ||
2909 | case STV_PROTECTED: | |
fcb93ecf PB |
2910 | hash_table = elf_hash_table (info); |
2911 | if (!is_elf_hash_table (hash_table)) | |
2912 | return FALSE; | |
2913 | ||
2914 | bed = get_elf_backend_data (hash_table->dynobj); | |
2915 | ||
986a241f RH |
2916 | /* Proper resolution for function pointer equality may require |
2917 | that these symbols perhaps be resolved dynamically, even though | |
2918 | we should be resolving them to the current module. */ | |
89a2ee5a | 2919 | if (!not_local_protected || !bed->is_function_type (h->type)) |
986a241f RH |
2920 | binding_stays_local_p = TRUE; |
2921 | break; | |
2922 | ||
2923 | default: | |
986a241f RH |
2924 | break; |
2925 | } | |
2926 | ||
aa37626c | 2927 | /* If it isn't defined locally, then clearly it's dynamic. */ |
89a2ee5a | 2928 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
aa37626c L |
2929 | return TRUE; |
2930 | ||
986a241f RH |
2931 | /* Otherwise, the symbol is dynamic if binding rules don't tell |
2932 | us that it remains local. */ | |
2933 | return !binding_stays_local_p; | |
2934 | } | |
f6c52c13 AM |
2935 | |
2936 | /* Return true if the symbol referred to by H should be considered | |
2937 | to resolve local to the current module, and false otherwise. Differs | |
2938 | from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of | |
2e76e85a | 2939 | undefined symbols. The two functions are virtually identical except |
89a2ee5a AM |
2940 | for the place where forced_local and dynindx == -1 are tested. If |
2941 | either of those tests are true, _bfd_elf_dynamic_symbol_p will say | |
2942 | the symbol is local, while _bfd_elf_symbol_refs_local_p will say | |
2943 | the symbol is local only for defined symbols. | |
2944 | It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as | |
2945 | !_bfd_elf_symbol_refs_local_p, except that targets differ in their | |
2946 | treatment of undefined weak symbols. For those that do not make | |
2947 | undefined weak symbols dynamic, both functions may return false. */ | |
f6c52c13 AM |
2948 | |
2949 | bfd_boolean | |
268b6b39 AM |
2950 | _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry *h, |
2951 | struct bfd_link_info *info, | |
2952 | bfd_boolean local_protected) | |
f6c52c13 | 2953 | { |
fcb93ecf PB |
2954 | const struct elf_backend_data *bed; |
2955 | struct elf_link_hash_table *hash_table; | |
2956 | ||
f6c52c13 AM |
2957 | /* If it's a local sym, of course we resolve locally. */ |
2958 | if (h == NULL) | |
2959 | return TRUE; | |
2960 | ||
d95edcac L |
2961 | /* STV_HIDDEN or STV_INTERNAL ones must be local. */ |
2962 | if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
2963 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
2964 | return TRUE; | |
2965 | ||
7e2294f9 AO |
2966 | /* Common symbols that become definitions don't get the DEF_REGULAR |
2967 | flag set, so test it first, and don't bail out. */ | |
2968 | if (ELF_COMMON_DEF_P (h)) | |
2969 | /* Do nothing. */; | |
f6c52c13 | 2970 | /* If we don't have a definition in a regular file, then we can't |
49ff44d6 L |
2971 | resolve locally. The sym is either undefined or dynamic. */ |
2972 | else if (!h->def_regular) | |
f6c52c13 AM |
2973 | return FALSE; |
2974 | ||
2975 | /* Forced local symbols resolve locally. */ | |
f5385ebf | 2976 | if (h->forced_local) |
f6c52c13 AM |
2977 | return TRUE; |
2978 | ||
2979 | /* As do non-dynamic symbols. */ | |
2980 | if (h->dynindx == -1) | |
2981 | return TRUE; | |
2982 | ||
2983 | /* At this point, we know the symbol is defined and dynamic. In an | |
2984 | executable it must resolve locally, likewise when building symbolic | |
2985 | shared libraries. */ | |
0e1862bb | 2986 | if (bfd_link_executable (info) || SYMBOLIC_BIND (info, h)) |
f6c52c13 AM |
2987 | return TRUE; |
2988 | ||
2989 | /* Now deal with defined dynamic symbols in shared libraries. Ones | |
2990 | with default visibility might not resolve locally. */ | |
2991 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
2992 | return FALSE; | |
2993 | ||
fcb93ecf PB |
2994 | hash_table = elf_hash_table (info); |
2995 | if (!is_elf_hash_table (hash_table)) | |
2996 | return TRUE; | |
2997 | ||
2998 | bed = get_elf_backend_data (hash_table->dynobj); | |
2999 | ||
f7483970 L |
3000 | /* If extern_protected_data is false, STV_PROTECTED non-function |
3001 | symbols are local. */ | |
889c2a67 L |
3002 | if ((!info->extern_protected_data |
3003 | || (info->extern_protected_data < 0 | |
3004 | && !bed->extern_protected_data)) | |
3005 | && !bed->is_function_type (h->type)) | |
1c16dfa5 L |
3006 | return TRUE; |
3007 | ||
f6c52c13 | 3008 | /* Function pointer equality tests may require that STV_PROTECTED |
2676a7d9 AM |
3009 | symbols be treated as dynamic symbols. If the address of a |
3010 | function not defined in an executable is set to that function's | |
3011 | plt entry in the executable, then the address of the function in | |
3012 | a shared library must also be the plt entry in the executable. */ | |
f6c52c13 AM |
3013 | return local_protected; |
3014 | } | |
e1918d23 AM |
3015 | |
3016 | /* Caches some TLS segment info, and ensures that the TLS segment vma is | |
3017 | aligned. Returns the first TLS output section. */ | |
3018 | ||
3019 | struct bfd_section * | |
3020 | _bfd_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) | |
3021 | { | |
3022 | struct bfd_section *sec, *tls; | |
3023 | unsigned int align = 0; | |
3024 | ||
3025 | for (sec = obfd->sections; sec != NULL; sec = sec->next) | |
3026 | if ((sec->flags & SEC_THREAD_LOCAL) != 0) | |
3027 | break; | |
3028 | tls = sec; | |
3029 | ||
3030 | for (; sec != NULL && (sec->flags & SEC_THREAD_LOCAL) != 0; sec = sec->next) | |
3031 | if (sec->alignment_power > align) | |
3032 | align = sec->alignment_power; | |
3033 | ||
3034 | elf_hash_table (info)->tls_sec = tls; | |
3035 | ||
3036 | /* Ensure the alignment of the first section is the largest alignment, | |
3037 | so that the tls segment starts aligned. */ | |
3038 | if (tls != NULL) | |
3039 | tls->alignment_power = align; | |
3040 | ||
3041 | return tls; | |
3042 | } | |
0ad989f9 L |
3043 | |
3044 | /* Return TRUE iff this is a non-common, definition of a non-function symbol. */ | |
3045 | static bfd_boolean | |
3046 | is_global_data_symbol_definition (bfd *abfd ATTRIBUTE_UNUSED, | |
3047 | Elf_Internal_Sym *sym) | |
3048 | { | |
a4d8e49b L |
3049 | const struct elf_backend_data *bed; |
3050 | ||
0ad989f9 L |
3051 | /* Local symbols do not count, but target specific ones might. */ |
3052 | if (ELF_ST_BIND (sym->st_info) != STB_GLOBAL | |
3053 | && ELF_ST_BIND (sym->st_info) < STB_LOOS) | |
3054 | return FALSE; | |
3055 | ||
fcb93ecf | 3056 | bed = get_elf_backend_data (abfd); |
0ad989f9 | 3057 | /* Function symbols do not count. */ |
fcb93ecf | 3058 | if (bed->is_function_type (ELF_ST_TYPE (sym->st_info))) |
0ad989f9 L |
3059 | return FALSE; |
3060 | ||
3061 | /* If the section is undefined, then so is the symbol. */ | |
3062 | if (sym->st_shndx == SHN_UNDEF) | |
3063 | return FALSE; | |
3064 | ||
3065 | /* If the symbol is defined in the common section, then | |
3066 | it is a common definition and so does not count. */ | |
a4d8e49b | 3067 | if (bed->common_definition (sym)) |
0ad989f9 L |
3068 | return FALSE; |
3069 | ||
3070 | /* If the symbol is in a target specific section then we | |
3071 | must rely upon the backend to tell us what it is. */ | |
3072 | if (sym->st_shndx >= SHN_LORESERVE && sym->st_shndx < SHN_ABS) | |
3073 | /* FIXME - this function is not coded yet: | |
3074 | ||
3075 | return _bfd_is_global_symbol_definition (abfd, sym); | |
3076 | ||
3077 | Instead for now assume that the definition is not global, | |
3078 | Even if this is wrong, at least the linker will behave | |
3079 | in the same way that it used to do. */ | |
3080 | return FALSE; | |
3081 | ||
3082 | return TRUE; | |
3083 | } | |
3084 | ||
3085 | /* Search the symbol table of the archive element of the archive ABFD | |
3086 | whose archive map contains a mention of SYMDEF, and determine if | |
3087 | the symbol is defined in this element. */ | |
3088 | static bfd_boolean | |
3089 | elf_link_is_defined_archive_symbol (bfd * abfd, carsym * symdef) | |
3090 | { | |
3091 | Elf_Internal_Shdr * hdr; | |
3092 | bfd_size_type symcount; | |
3093 | bfd_size_type extsymcount; | |
3094 | bfd_size_type extsymoff; | |
3095 | Elf_Internal_Sym *isymbuf; | |
3096 | Elf_Internal_Sym *isym; | |
3097 | Elf_Internal_Sym *isymend; | |
3098 | bfd_boolean result; | |
3099 | ||
3100 | abfd = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
3101 | if (abfd == NULL) | |
3102 | return FALSE; | |
3103 | ||
f0bf6bfd L |
3104 | /* Return FALSE if the object has been claimed by plugin. */ |
3105 | if (abfd->plugin_format == bfd_plugin_yes) | |
3106 | return FALSE; | |
3107 | ||
0ad989f9 L |
3108 | if (! bfd_check_format (abfd, bfd_object)) |
3109 | return FALSE; | |
3110 | ||
0ad989f9 L |
3111 | /* Select the appropriate symbol table. */ |
3112 | if ((abfd->flags & DYNAMIC) == 0 || elf_dynsymtab (abfd) == 0) | |
3113 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
3114 | else | |
3115 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
3116 | ||
3117 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
3118 | ||
3119 | /* The sh_info field of the symtab header tells us where the | |
3120 | external symbols start. We don't care about the local symbols. */ | |
3121 | if (elf_bad_symtab (abfd)) | |
3122 | { | |
3123 | extsymcount = symcount; | |
3124 | extsymoff = 0; | |
3125 | } | |
3126 | else | |
3127 | { | |
3128 | extsymcount = symcount - hdr->sh_info; | |
3129 | extsymoff = hdr->sh_info; | |
3130 | } | |
3131 | ||
3132 | if (extsymcount == 0) | |
3133 | return FALSE; | |
3134 | ||
3135 | /* Read in the symbol table. */ | |
3136 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
3137 | NULL, NULL, NULL); | |
3138 | if (isymbuf == NULL) | |
3139 | return FALSE; | |
3140 | ||
3141 | /* Scan the symbol table looking for SYMDEF. */ | |
3142 | result = FALSE; | |
3143 | for (isym = isymbuf, isymend = isymbuf + extsymcount; isym < isymend; isym++) | |
3144 | { | |
3145 | const char *name; | |
3146 | ||
3147 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
3148 | isym->st_name); | |
3149 | if (name == NULL) | |
3150 | break; | |
3151 | ||
3152 | if (strcmp (name, symdef->name) == 0) | |
3153 | { | |
3154 | result = is_global_data_symbol_definition (abfd, isym); | |
3155 | break; | |
3156 | } | |
3157 | } | |
3158 | ||
3159 | free (isymbuf); | |
3160 | ||
3161 | return result; | |
3162 | } | |
3163 | \f | |
5a580b3a AM |
3164 | /* Add an entry to the .dynamic table. */ |
3165 | ||
3166 | bfd_boolean | |
3167 | _bfd_elf_add_dynamic_entry (struct bfd_link_info *info, | |
3168 | bfd_vma tag, | |
3169 | bfd_vma val) | |
3170 | { | |
3171 | struct elf_link_hash_table *hash_table; | |
3172 | const struct elf_backend_data *bed; | |
3173 | asection *s; | |
3174 | bfd_size_type newsize; | |
3175 | bfd_byte *newcontents; | |
3176 | Elf_Internal_Dyn dyn; | |
3177 | ||
3178 | hash_table = elf_hash_table (info); | |
3179 | if (! is_elf_hash_table (hash_table)) | |
3180 | return FALSE; | |
3181 | ||
3182 | bed = get_elf_backend_data (hash_table->dynobj); | |
3d4d4302 | 3183 | s = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
5a580b3a AM |
3184 | BFD_ASSERT (s != NULL); |
3185 | ||
eea6121a | 3186 | newsize = s->size + bed->s->sizeof_dyn; |
a50b1753 | 3187 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); |
5a580b3a AM |
3188 | if (newcontents == NULL) |
3189 | return FALSE; | |
3190 | ||
3191 | dyn.d_tag = tag; | |
3192 | dyn.d_un.d_val = val; | |
eea6121a | 3193 | bed->s->swap_dyn_out (hash_table->dynobj, &dyn, newcontents + s->size); |
5a580b3a | 3194 | |
eea6121a | 3195 | s->size = newsize; |
5a580b3a AM |
3196 | s->contents = newcontents; |
3197 | ||
3198 | return TRUE; | |
3199 | } | |
3200 | ||
3201 | /* Add a DT_NEEDED entry for this dynamic object if DO_IT is true, | |
3202 | otherwise just check whether one already exists. Returns -1 on error, | |
3203 | 1 if a DT_NEEDED tag already exists, and 0 on success. */ | |
3204 | ||
4ad4eba5 | 3205 | static int |
7e9f0867 AM |
3206 | elf_add_dt_needed_tag (bfd *abfd, |
3207 | struct bfd_link_info *info, | |
4ad4eba5 AM |
3208 | const char *soname, |
3209 | bfd_boolean do_it) | |
5a580b3a AM |
3210 | { |
3211 | struct elf_link_hash_table *hash_table; | |
5a580b3a AM |
3212 | bfd_size_type strindex; |
3213 | ||
7e9f0867 AM |
3214 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
3215 | return -1; | |
3216 | ||
5a580b3a | 3217 | hash_table = elf_hash_table (info); |
5a580b3a AM |
3218 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, soname, FALSE); |
3219 | if (strindex == (bfd_size_type) -1) | |
3220 | return -1; | |
3221 | ||
02be4619 | 3222 | if (_bfd_elf_strtab_refcount (hash_table->dynstr, strindex) != 1) |
5a580b3a AM |
3223 | { |
3224 | asection *sdyn; | |
3225 | const struct elf_backend_data *bed; | |
3226 | bfd_byte *extdyn; | |
3227 | ||
3228 | bed = get_elf_backend_data (hash_table->dynobj); | |
3d4d4302 | 3229 | sdyn = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
7e9f0867 AM |
3230 | if (sdyn != NULL) |
3231 | for (extdyn = sdyn->contents; | |
3232 | extdyn < sdyn->contents + sdyn->size; | |
3233 | extdyn += bed->s->sizeof_dyn) | |
3234 | { | |
3235 | Elf_Internal_Dyn dyn; | |
5a580b3a | 3236 | |
7e9f0867 AM |
3237 | bed->s->swap_dyn_in (hash_table->dynobj, extdyn, &dyn); |
3238 | if (dyn.d_tag == DT_NEEDED | |
3239 | && dyn.d_un.d_val == strindex) | |
3240 | { | |
3241 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3242 | return 1; | |
3243 | } | |
3244 | } | |
5a580b3a AM |
3245 | } |
3246 | ||
3247 | if (do_it) | |
3248 | { | |
7e9f0867 AM |
3249 | if (!_bfd_elf_link_create_dynamic_sections (hash_table->dynobj, info)) |
3250 | return -1; | |
3251 | ||
5a580b3a AM |
3252 | if (!_bfd_elf_add_dynamic_entry (info, DT_NEEDED, strindex)) |
3253 | return -1; | |
3254 | } | |
3255 | else | |
3256 | /* We were just checking for existence of the tag. */ | |
3257 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3258 | ||
3259 | return 0; | |
3260 | } | |
3261 | ||
7b15fa7a AM |
3262 | /* Return true if SONAME is on the needed list between NEEDED and STOP |
3263 | (or the end of list if STOP is NULL), and needed by a library that | |
3264 | will be loaded. */ | |
3265 | ||
010e5ae2 | 3266 | static bfd_boolean |
7b15fa7a AM |
3267 | on_needed_list (const char *soname, |
3268 | struct bfd_link_needed_list *needed, | |
3269 | struct bfd_link_needed_list *stop) | |
010e5ae2 | 3270 | { |
7b15fa7a AM |
3271 | struct bfd_link_needed_list *look; |
3272 | for (look = needed; look != stop; look = look->next) | |
3273 | if (strcmp (soname, look->name) == 0 | |
3274 | && ((elf_dyn_lib_class (look->by) & DYN_AS_NEEDED) == 0 | |
3275 | /* If needed by a library that itself is not directly | |
3276 | needed, recursively check whether that library is | |
3277 | indirectly needed. Since we add DT_NEEDED entries to | |
3278 | the end of the list, library dependencies appear after | |
3279 | the library. Therefore search prior to the current | |
3280 | LOOK, preventing possible infinite recursion. */ | |
3281 | || on_needed_list (elf_dt_name (look->by), needed, look))) | |
010e5ae2 AM |
3282 | return TRUE; |
3283 | ||
3284 | return FALSE; | |
3285 | } | |
3286 | ||
14160578 | 3287 | /* Sort symbol by value, section, and size. */ |
4ad4eba5 AM |
3288 | static int |
3289 | elf_sort_symbol (const void *arg1, const void *arg2) | |
5a580b3a AM |
3290 | { |
3291 | const struct elf_link_hash_entry *h1; | |
3292 | const struct elf_link_hash_entry *h2; | |
10b7e05b | 3293 | bfd_signed_vma vdiff; |
5a580b3a AM |
3294 | |
3295 | h1 = *(const struct elf_link_hash_entry **) arg1; | |
3296 | h2 = *(const struct elf_link_hash_entry **) arg2; | |
10b7e05b NC |
3297 | vdiff = h1->root.u.def.value - h2->root.u.def.value; |
3298 | if (vdiff != 0) | |
3299 | return vdiff > 0 ? 1 : -1; | |
3300 | else | |
3301 | { | |
d3435ae8 | 3302 | int sdiff = h1->root.u.def.section->id - h2->root.u.def.section->id; |
10b7e05b NC |
3303 | if (sdiff != 0) |
3304 | return sdiff > 0 ? 1 : -1; | |
3305 | } | |
14160578 AM |
3306 | vdiff = h1->size - h2->size; |
3307 | return vdiff == 0 ? 0 : vdiff > 0 ? 1 : -1; | |
5a580b3a | 3308 | } |
4ad4eba5 | 3309 | |
5a580b3a AM |
3310 | /* This function is used to adjust offsets into .dynstr for |
3311 | dynamic symbols. This is called via elf_link_hash_traverse. */ | |
3312 | ||
3313 | static bfd_boolean | |
3314 | elf_adjust_dynstr_offsets (struct elf_link_hash_entry *h, void *data) | |
3315 | { | |
a50b1753 | 3316 | struct elf_strtab_hash *dynstr = (struct elf_strtab_hash *) data; |
5a580b3a | 3317 | |
5a580b3a AM |
3318 | if (h->dynindx != -1) |
3319 | h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index); | |
3320 | return TRUE; | |
3321 | } | |
3322 | ||
3323 | /* Assign string offsets in .dynstr, update all structures referencing | |
3324 | them. */ | |
3325 | ||
4ad4eba5 AM |
3326 | static bfd_boolean |
3327 | elf_finalize_dynstr (bfd *output_bfd, struct bfd_link_info *info) | |
5a580b3a AM |
3328 | { |
3329 | struct elf_link_hash_table *hash_table = elf_hash_table (info); | |
3330 | struct elf_link_local_dynamic_entry *entry; | |
3331 | struct elf_strtab_hash *dynstr = hash_table->dynstr; | |
3332 | bfd *dynobj = hash_table->dynobj; | |
3333 | asection *sdyn; | |
3334 | bfd_size_type size; | |
3335 | const struct elf_backend_data *bed; | |
3336 | bfd_byte *extdyn; | |
3337 | ||
3338 | _bfd_elf_strtab_finalize (dynstr); | |
3339 | size = _bfd_elf_strtab_size (dynstr); | |
3340 | ||
3341 | bed = get_elf_backend_data (dynobj); | |
3d4d4302 | 3342 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
5a580b3a AM |
3343 | BFD_ASSERT (sdyn != NULL); |
3344 | ||
3345 | /* Update all .dynamic entries referencing .dynstr strings. */ | |
3346 | for (extdyn = sdyn->contents; | |
eea6121a | 3347 | extdyn < sdyn->contents + sdyn->size; |
5a580b3a AM |
3348 | extdyn += bed->s->sizeof_dyn) |
3349 | { | |
3350 | Elf_Internal_Dyn dyn; | |
3351 | ||
3352 | bed->s->swap_dyn_in (dynobj, extdyn, &dyn); | |
3353 | switch (dyn.d_tag) | |
3354 | { | |
3355 | case DT_STRSZ: | |
3356 | dyn.d_un.d_val = size; | |
3357 | break; | |
3358 | case DT_NEEDED: | |
3359 | case DT_SONAME: | |
3360 | case DT_RPATH: | |
3361 | case DT_RUNPATH: | |
3362 | case DT_FILTER: | |
3363 | case DT_AUXILIARY: | |
7ee314fa AM |
3364 | case DT_AUDIT: |
3365 | case DT_DEPAUDIT: | |
5a580b3a AM |
3366 | dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val); |
3367 | break; | |
3368 | default: | |
3369 | continue; | |
3370 | } | |
3371 | bed->s->swap_dyn_out (dynobj, &dyn, extdyn); | |
3372 | } | |
3373 | ||
3374 | /* Now update local dynamic symbols. */ | |
3375 | for (entry = hash_table->dynlocal; entry ; entry = entry->next) | |
3376 | entry->isym.st_name = _bfd_elf_strtab_offset (dynstr, | |
3377 | entry->isym.st_name); | |
3378 | ||
3379 | /* And the rest of dynamic symbols. */ | |
3380 | elf_link_hash_traverse (hash_table, elf_adjust_dynstr_offsets, dynstr); | |
3381 | ||
3382 | /* Adjust version definitions. */ | |
3383 | if (elf_tdata (output_bfd)->cverdefs) | |
3384 | { | |
3385 | asection *s; | |
3386 | bfd_byte *p; | |
3387 | bfd_size_type i; | |
3388 | Elf_Internal_Verdef def; | |
3389 | Elf_Internal_Verdaux defaux; | |
3390 | ||
3d4d4302 | 3391 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); |
5a580b3a AM |
3392 | p = s->contents; |
3393 | do | |
3394 | { | |
3395 | _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p, | |
3396 | &def); | |
3397 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
3398 | if (def.vd_aux != sizeof (Elf_External_Verdef)) |
3399 | continue; | |
5a580b3a AM |
3400 | for (i = 0; i < def.vd_cnt; ++i) |
3401 | { | |
3402 | _bfd_elf_swap_verdaux_in (output_bfd, | |
3403 | (Elf_External_Verdaux *) p, &defaux); | |
3404 | defaux.vda_name = _bfd_elf_strtab_offset (dynstr, | |
3405 | defaux.vda_name); | |
3406 | _bfd_elf_swap_verdaux_out (output_bfd, | |
3407 | &defaux, (Elf_External_Verdaux *) p); | |
3408 | p += sizeof (Elf_External_Verdaux); | |
3409 | } | |
3410 | } | |
3411 | while (def.vd_next); | |
3412 | } | |
3413 | ||
3414 | /* Adjust version references. */ | |
3415 | if (elf_tdata (output_bfd)->verref) | |
3416 | { | |
3417 | asection *s; | |
3418 | bfd_byte *p; | |
3419 | bfd_size_type i; | |
3420 | Elf_Internal_Verneed need; | |
3421 | Elf_Internal_Vernaux needaux; | |
3422 | ||
3d4d4302 | 3423 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); |
5a580b3a AM |
3424 | p = s->contents; |
3425 | do | |
3426 | { | |
3427 | _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p, | |
3428 | &need); | |
3429 | need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file); | |
3430 | _bfd_elf_swap_verneed_out (output_bfd, &need, | |
3431 | (Elf_External_Verneed *) p); | |
3432 | p += sizeof (Elf_External_Verneed); | |
3433 | for (i = 0; i < need.vn_cnt; ++i) | |
3434 | { | |
3435 | _bfd_elf_swap_vernaux_in (output_bfd, | |
3436 | (Elf_External_Vernaux *) p, &needaux); | |
3437 | needaux.vna_name = _bfd_elf_strtab_offset (dynstr, | |
3438 | needaux.vna_name); | |
3439 | _bfd_elf_swap_vernaux_out (output_bfd, | |
3440 | &needaux, | |
3441 | (Elf_External_Vernaux *) p); | |
3442 | p += sizeof (Elf_External_Vernaux); | |
3443 | } | |
3444 | } | |
3445 | while (need.vn_next); | |
3446 | } | |
3447 | ||
3448 | return TRUE; | |
3449 | } | |
3450 | \f | |
13285a1b AM |
3451 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. |
3452 | The default is to only match when the INPUT and OUTPUT are exactly | |
3453 | the same target. */ | |
3454 | ||
3455 | bfd_boolean | |
3456 | _bfd_elf_default_relocs_compatible (const bfd_target *input, | |
3457 | const bfd_target *output) | |
3458 | { | |
3459 | return input == output; | |
3460 | } | |
3461 | ||
3462 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. | |
3463 | This version is used when different targets for the same architecture | |
3464 | are virtually identical. */ | |
3465 | ||
3466 | bfd_boolean | |
3467 | _bfd_elf_relocs_compatible (const bfd_target *input, | |
3468 | const bfd_target *output) | |
3469 | { | |
3470 | const struct elf_backend_data *obed, *ibed; | |
3471 | ||
3472 | if (input == output) | |
3473 | return TRUE; | |
3474 | ||
3475 | ibed = xvec_get_elf_backend_data (input); | |
3476 | obed = xvec_get_elf_backend_data (output); | |
3477 | ||
3478 | if (ibed->arch != obed->arch) | |
3479 | return FALSE; | |
3480 | ||
3481 | /* If both backends are using this function, deem them compatible. */ | |
3482 | return ibed->relocs_compatible == obed->relocs_compatible; | |
3483 | } | |
3484 | ||
e5034e59 AM |
3485 | /* Make a special call to the linker "notice" function to tell it that |
3486 | we are about to handle an as-needed lib, or have finished | |
1b786873 | 3487 | processing the lib. */ |
e5034e59 AM |
3488 | |
3489 | bfd_boolean | |
3490 | _bfd_elf_notice_as_needed (bfd *ibfd, | |
3491 | struct bfd_link_info *info, | |
3492 | enum notice_asneeded_action act) | |
3493 | { | |
46135103 | 3494 | return (*info->callbacks->notice) (info, NULL, NULL, ibfd, NULL, act, 0); |
e5034e59 AM |
3495 | } |
3496 | ||
d9689752 L |
3497 | /* Check relocations an ELF object file. */ |
3498 | ||
3499 | bfd_boolean | |
3500 | _bfd_elf_link_check_relocs (bfd *abfd, struct bfd_link_info *info) | |
3501 | { | |
3502 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3503 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
3504 | ||
3505 | /* If this object is the same format as the output object, and it is | |
3506 | not a shared library, then let the backend look through the | |
3507 | relocs. | |
3508 | ||
3509 | This is required to build global offset table entries and to | |
3510 | arrange for dynamic relocs. It is not required for the | |
3511 | particular common case of linking non PIC code, even when linking | |
3512 | against shared libraries, but unfortunately there is no way of | |
3513 | knowing whether an object file has been compiled PIC or not. | |
3514 | Looking through the relocs is not particularly time consuming. | |
3515 | The problem is that we must either (1) keep the relocs in memory, | |
3516 | which causes the linker to require additional runtime memory or | |
3517 | (2) read the relocs twice from the input file, which wastes time. | |
3518 | This would be a good case for using mmap. | |
3519 | ||
3520 | I have no idea how to handle linking PIC code into a file of a | |
3521 | different format. It probably can't be done. */ | |
3522 | if ((abfd->flags & DYNAMIC) == 0 | |
3523 | && is_elf_hash_table (htab) | |
3524 | && bed->check_relocs != NULL | |
3525 | && elf_object_id (abfd) == elf_hash_table_id (htab) | |
3526 | && (*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) | |
3527 | { | |
3528 | asection *o; | |
3529 | ||
3530 | for (o = abfd->sections; o != NULL; o = o->next) | |
3531 | { | |
3532 | Elf_Internal_Rela *internal_relocs; | |
3533 | bfd_boolean ok; | |
3534 | ||
5ce03cea | 3535 | /* Don't check relocations in excluded sections. */ |
d9689752 | 3536 | if ((o->flags & SEC_RELOC) == 0 |
5ce03cea | 3537 | || (o->flags & SEC_EXCLUDE) != 0 |
d9689752 L |
3538 | || o->reloc_count == 0 |
3539 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
3540 | && (o->flags & SEC_DEBUGGING) != 0) | |
3541 | || bfd_is_abs_section (o->output_section)) | |
3542 | continue; | |
3543 | ||
3544 | internal_relocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, | |
3545 | info->keep_memory); | |
3546 | if (internal_relocs == NULL) | |
3547 | return FALSE; | |
3548 | ||
3549 | ok = (*bed->check_relocs) (abfd, info, o, internal_relocs); | |
3550 | ||
3551 | if (elf_section_data (o)->relocs != internal_relocs) | |
3552 | free (internal_relocs); | |
3553 | ||
3554 | if (! ok) | |
3555 | return FALSE; | |
3556 | } | |
3557 | } | |
3558 | ||
3559 | return TRUE; | |
3560 | } | |
3561 | ||
4ad4eba5 AM |
3562 | /* Add symbols from an ELF object file to the linker hash table. */ |
3563 | ||
3564 | static bfd_boolean | |
3565 | elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) | |
3566 | { | |
a0c402a5 | 3567 | Elf_Internal_Ehdr *ehdr; |
4ad4eba5 AM |
3568 | Elf_Internal_Shdr *hdr; |
3569 | bfd_size_type symcount; | |
3570 | bfd_size_type extsymcount; | |
3571 | bfd_size_type extsymoff; | |
3572 | struct elf_link_hash_entry **sym_hash; | |
3573 | bfd_boolean dynamic; | |
3574 | Elf_External_Versym *extversym = NULL; | |
3575 | Elf_External_Versym *ever; | |
3576 | struct elf_link_hash_entry *weaks; | |
3577 | struct elf_link_hash_entry **nondeflt_vers = NULL; | |
3578 | bfd_size_type nondeflt_vers_cnt = 0; | |
3579 | Elf_Internal_Sym *isymbuf = NULL; | |
3580 | Elf_Internal_Sym *isym; | |
3581 | Elf_Internal_Sym *isymend; | |
3582 | const struct elf_backend_data *bed; | |
3583 | bfd_boolean add_needed; | |
66eb6687 | 3584 | struct elf_link_hash_table *htab; |
4ad4eba5 | 3585 | bfd_size_type amt; |
66eb6687 | 3586 | void *alloc_mark = NULL; |
4f87808c AM |
3587 | struct bfd_hash_entry **old_table = NULL; |
3588 | unsigned int old_size = 0; | |
3589 | unsigned int old_count = 0; | |
66eb6687 | 3590 | void *old_tab = NULL; |
66eb6687 AM |
3591 | void *old_ent; |
3592 | struct bfd_link_hash_entry *old_undefs = NULL; | |
3593 | struct bfd_link_hash_entry *old_undefs_tail = NULL; | |
3594 | long old_dynsymcount = 0; | |
a4542f1b | 3595 | bfd_size_type old_dynstr_size = 0; |
66eb6687 | 3596 | size_t tabsize = 0; |
db6a5d5f | 3597 | asection *s; |
29a9f53e | 3598 | bfd_boolean just_syms; |
4ad4eba5 | 3599 | |
66eb6687 | 3600 | htab = elf_hash_table (info); |
4ad4eba5 | 3601 | bed = get_elf_backend_data (abfd); |
4ad4eba5 AM |
3602 | |
3603 | if ((abfd->flags & DYNAMIC) == 0) | |
3604 | dynamic = FALSE; | |
3605 | else | |
3606 | { | |
3607 | dynamic = TRUE; | |
3608 | ||
3609 | /* You can't use -r against a dynamic object. Also, there's no | |
3610 | hope of using a dynamic object which does not exactly match | |
3611 | the format of the output file. */ | |
0e1862bb | 3612 | if (bfd_link_relocatable (info) |
66eb6687 | 3613 | || !is_elf_hash_table (htab) |
f13a99db | 3614 | || info->output_bfd->xvec != abfd->xvec) |
4ad4eba5 | 3615 | { |
0e1862bb | 3616 | if (bfd_link_relocatable (info)) |
9a0789ec NC |
3617 | bfd_set_error (bfd_error_invalid_operation); |
3618 | else | |
3619 | bfd_set_error (bfd_error_wrong_format); | |
4ad4eba5 AM |
3620 | goto error_return; |
3621 | } | |
3622 | } | |
3623 | ||
a0c402a5 L |
3624 | ehdr = elf_elfheader (abfd); |
3625 | if (info->warn_alternate_em | |
3626 | && bed->elf_machine_code != ehdr->e_machine | |
3627 | && ((bed->elf_machine_alt1 != 0 | |
3628 | && ehdr->e_machine == bed->elf_machine_alt1) | |
3629 | || (bed->elf_machine_alt2 != 0 | |
3630 | && ehdr->e_machine == bed->elf_machine_alt2))) | |
3631 | info->callbacks->einfo | |
3632 | (_("%P: alternate ELF machine code found (%d) in %B, expecting %d\n"), | |
3633 | ehdr->e_machine, abfd, bed->elf_machine_code); | |
3634 | ||
4ad4eba5 AM |
3635 | /* As a GNU extension, any input sections which are named |
3636 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
3637 | symbol. This differs from .gnu.warning sections, which generate | |
3638 | warnings when they are included in an output file. */ | |
dd98f8d2 | 3639 | /* PR 12761: Also generate this warning when building shared libraries. */ |
db6a5d5f | 3640 | for (s = abfd->sections; s != NULL; s = s->next) |
4ad4eba5 | 3641 | { |
db6a5d5f | 3642 | const char *name; |
4ad4eba5 | 3643 | |
db6a5d5f AM |
3644 | name = bfd_get_section_name (abfd, s); |
3645 | if (CONST_STRNEQ (name, ".gnu.warning.")) | |
4ad4eba5 | 3646 | { |
db6a5d5f AM |
3647 | char *msg; |
3648 | bfd_size_type sz; | |
3649 | ||
3650 | name += sizeof ".gnu.warning." - 1; | |
3651 | ||
3652 | /* If this is a shared object, then look up the symbol | |
3653 | in the hash table. If it is there, and it is already | |
3654 | been defined, then we will not be using the entry | |
3655 | from this shared object, so we don't need to warn. | |
3656 | FIXME: If we see the definition in a regular object | |
3657 | later on, we will warn, but we shouldn't. The only | |
3658 | fix is to keep track of what warnings we are supposed | |
3659 | to emit, and then handle them all at the end of the | |
3660 | link. */ | |
3661 | if (dynamic) | |
4ad4eba5 | 3662 | { |
db6a5d5f AM |
3663 | struct elf_link_hash_entry *h; |
3664 | ||
3665 | h = elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE); | |
3666 | ||
3667 | /* FIXME: What about bfd_link_hash_common? */ | |
3668 | if (h != NULL | |
3669 | && (h->root.type == bfd_link_hash_defined | |
3670 | || h->root.type == bfd_link_hash_defweak)) | |
3671 | continue; | |
3672 | } | |
4ad4eba5 | 3673 | |
db6a5d5f AM |
3674 | sz = s->size; |
3675 | msg = (char *) bfd_alloc (abfd, sz + 1); | |
3676 | if (msg == NULL) | |
3677 | goto error_return; | |
4ad4eba5 | 3678 | |
db6a5d5f AM |
3679 | if (! bfd_get_section_contents (abfd, s, msg, 0, sz)) |
3680 | goto error_return; | |
4ad4eba5 | 3681 | |
db6a5d5f | 3682 | msg[sz] = '\0'; |
4ad4eba5 | 3683 | |
db6a5d5f AM |
3684 | if (! (_bfd_generic_link_add_one_symbol |
3685 | (info, abfd, name, BSF_WARNING, s, 0, msg, | |
3686 | FALSE, bed->collect, NULL))) | |
3687 | goto error_return; | |
4ad4eba5 | 3688 | |
0e1862bb | 3689 | if (bfd_link_executable (info)) |
db6a5d5f AM |
3690 | { |
3691 | /* Clobber the section size so that the warning does | |
3692 | not get copied into the output file. */ | |
3693 | s->size = 0; | |
11d2f718 | 3694 | |
db6a5d5f AM |
3695 | /* Also set SEC_EXCLUDE, so that symbols defined in |
3696 | the warning section don't get copied to the output. */ | |
3697 | s->flags |= SEC_EXCLUDE; | |
4ad4eba5 AM |
3698 | } |
3699 | } | |
3700 | } | |
3701 | ||
29a9f53e L |
3702 | just_syms = ((s = abfd->sections) != NULL |
3703 | && s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS); | |
3704 | ||
4ad4eba5 AM |
3705 | add_needed = TRUE; |
3706 | if (! dynamic) | |
3707 | { | |
3708 | /* If we are creating a shared library, create all the dynamic | |
3709 | sections immediately. We need to attach them to something, | |
3710 | so we attach them to this BFD, provided it is the right | |
bf89386a L |
3711 | format and is not from ld --just-symbols. Always create the |
3712 | dynamic sections for -E/--dynamic-list. FIXME: If there | |
29a9f53e L |
3713 | are no input BFD's of the same format as the output, we can't |
3714 | make a shared library. */ | |
3715 | if (!just_syms | |
bf89386a | 3716 | && (bfd_link_pic (info) |
9c1d7a08 L |
3717 | || (!bfd_link_relocatable (info) |
3718 | && (info->export_dynamic || info->dynamic))) | |
66eb6687 | 3719 | && is_elf_hash_table (htab) |
f13a99db | 3720 | && info->output_bfd->xvec == abfd->xvec |
66eb6687 | 3721 | && !htab->dynamic_sections_created) |
4ad4eba5 AM |
3722 | { |
3723 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
3724 | goto error_return; | |
3725 | } | |
3726 | } | |
66eb6687 | 3727 | else if (!is_elf_hash_table (htab)) |
4ad4eba5 AM |
3728 | goto error_return; |
3729 | else | |
3730 | { | |
4ad4eba5 | 3731 | const char *soname = NULL; |
7ee314fa | 3732 | char *audit = NULL; |
4ad4eba5 AM |
3733 | struct bfd_link_needed_list *rpath = NULL, *runpath = NULL; |
3734 | int ret; | |
3735 | ||
3736 | /* ld --just-symbols and dynamic objects don't mix very well. | |
92fd189d | 3737 | ld shouldn't allow it. */ |
29a9f53e | 3738 | if (just_syms) |
92fd189d | 3739 | abort (); |
4ad4eba5 AM |
3740 | |
3741 | /* If this dynamic lib was specified on the command line with | |
3742 | --as-needed in effect, then we don't want to add a DT_NEEDED | |
3743 | tag unless the lib is actually used. Similary for libs brought | |
e56f61be L |
3744 | in by another lib's DT_NEEDED. When --no-add-needed is used |
3745 | on a dynamic lib, we don't want to add a DT_NEEDED entry for | |
3746 | any dynamic library in DT_NEEDED tags in the dynamic lib at | |
3747 | all. */ | |
3748 | add_needed = (elf_dyn_lib_class (abfd) | |
3749 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | |
3750 | | DYN_NO_NEEDED)) == 0; | |
4ad4eba5 AM |
3751 | |
3752 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
3753 | if (s != NULL) | |
3754 | { | |
3755 | bfd_byte *dynbuf; | |
3756 | bfd_byte *extdyn; | |
cb33740c | 3757 | unsigned int elfsec; |
4ad4eba5 AM |
3758 | unsigned long shlink; |
3759 | ||
eea6121a | 3760 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) |
f8703194 L |
3761 | { |
3762 | error_free_dyn: | |
3763 | free (dynbuf); | |
3764 | goto error_return; | |
3765 | } | |
4ad4eba5 AM |
3766 | |
3767 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 3768 | if (elfsec == SHN_BAD) |
4ad4eba5 AM |
3769 | goto error_free_dyn; |
3770 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
3771 | ||
3772 | for (extdyn = dynbuf; | |
eea6121a | 3773 | extdyn < dynbuf + s->size; |
4ad4eba5 AM |
3774 | extdyn += bed->s->sizeof_dyn) |
3775 | { | |
3776 | Elf_Internal_Dyn dyn; | |
3777 | ||
3778 | bed->s->swap_dyn_in (abfd, extdyn, &dyn); | |
3779 | if (dyn.d_tag == DT_SONAME) | |
3780 | { | |
3781 | unsigned int tagv = dyn.d_un.d_val; | |
3782 | soname = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
3783 | if (soname == NULL) | |
3784 | goto error_free_dyn; | |
3785 | } | |
3786 | if (dyn.d_tag == DT_NEEDED) | |
3787 | { | |
3788 | struct bfd_link_needed_list *n, **pn; | |
3789 | char *fnm, *anm; | |
3790 | unsigned int tagv = dyn.d_un.d_val; | |
3791 | ||
3792 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3793 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3794 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3795 | if (n == NULL || fnm == NULL) | |
3796 | goto error_free_dyn; | |
3797 | amt = strlen (fnm) + 1; | |
a50b1753 | 3798 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3799 | if (anm == NULL) |
3800 | goto error_free_dyn; | |
3801 | memcpy (anm, fnm, amt); | |
3802 | n->name = anm; | |
3803 | n->by = abfd; | |
3804 | n->next = NULL; | |
66eb6687 | 3805 | for (pn = &htab->needed; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
3806 | ; |
3807 | *pn = n; | |
3808 | } | |
3809 | if (dyn.d_tag == DT_RUNPATH) | |
3810 | { | |
3811 | struct bfd_link_needed_list *n, **pn; | |
3812 | char *fnm, *anm; | |
3813 | unsigned int tagv = dyn.d_un.d_val; | |
3814 | ||
3815 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3816 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3817 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3818 | if (n == NULL || fnm == NULL) | |
3819 | goto error_free_dyn; | |
3820 | amt = strlen (fnm) + 1; | |
a50b1753 | 3821 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3822 | if (anm == NULL) |
3823 | goto error_free_dyn; | |
3824 | memcpy (anm, fnm, amt); | |
3825 | n->name = anm; | |
3826 | n->by = abfd; | |
3827 | n->next = NULL; | |
3828 | for (pn = & runpath; | |
3829 | *pn != NULL; | |
3830 | pn = &(*pn)->next) | |
3831 | ; | |
3832 | *pn = n; | |
3833 | } | |
3834 | /* Ignore DT_RPATH if we have seen DT_RUNPATH. */ | |
3835 | if (!runpath && dyn.d_tag == DT_RPATH) | |
3836 | { | |
3837 | struct bfd_link_needed_list *n, **pn; | |
3838 | char *fnm, *anm; | |
3839 | unsigned int tagv = dyn.d_un.d_val; | |
3840 | ||
3841 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3842 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3843 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3844 | if (n == NULL || fnm == NULL) | |
3845 | goto error_free_dyn; | |
3846 | amt = strlen (fnm) + 1; | |
a50b1753 | 3847 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 | 3848 | if (anm == NULL) |
f8703194 | 3849 | goto error_free_dyn; |
4ad4eba5 AM |
3850 | memcpy (anm, fnm, amt); |
3851 | n->name = anm; | |
3852 | n->by = abfd; | |
3853 | n->next = NULL; | |
3854 | for (pn = & rpath; | |
3855 | *pn != NULL; | |
3856 | pn = &(*pn)->next) | |
3857 | ; | |
3858 | *pn = n; | |
3859 | } | |
7ee314fa AM |
3860 | if (dyn.d_tag == DT_AUDIT) |
3861 | { | |
3862 | unsigned int tagv = dyn.d_un.d_val; | |
3863 | audit = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
3864 | } | |
4ad4eba5 AM |
3865 | } |
3866 | ||
3867 | free (dynbuf); | |
3868 | } | |
3869 | ||
3870 | /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that | |
3871 | frees all more recently bfd_alloc'd blocks as well. */ | |
3872 | if (runpath) | |
3873 | rpath = runpath; | |
3874 | ||
3875 | if (rpath) | |
3876 | { | |
3877 | struct bfd_link_needed_list **pn; | |
66eb6687 | 3878 | for (pn = &htab->runpath; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
3879 | ; |
3880 | *pn = rpath; | |
3881 | } | |
3882 | ||
3883 | /* We do not want to include any of the sections in a dynamic | |
3884 | object in the output file. We hack by simply clobbering the | |
3885 | list of sections in the BFD. This could be handled more | |
3886 | cleanly by, say, a new section flag; the existing | |
3887 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
3888 | still implies that the section takes up space in the output | |
3889 | file. */ | |
3890 | bfd_section_list_clear (abfd); | |
3891 | ||
4ad4eba5 AM |
3892 | /* Find the name to use in a DT_NEEDED entry that refers to this |
3893 | object. If the object has a DT_SONAME entry, we use it. | |
3894 | Otherwise, if the generic linker stuck something in | |
3895 | elf_dt_name, we use that. Otherwise, we just use the file | |
3896 | name. */ | |
3897 | if (soname == NULL || *soname == '\0') | |
3898 | { | |
3899 | soname = elf_dt_name (abfd); | |
3900 | if (soname == NULL || *soname == '\0') | |
3901 | soname = bfd_get_filename (abfd); | |
3902 | } | |
3903 | ||
3904 | /* Save the SONAME because sometimes the linker emulation code | |
3905 | will need to know it. */ | |
3906 | elf_dt_name (abfd) = soname; | |
3907 | ||
7e9f0867 | 3908 | ret = elf_add_dt_needed_tag (abfd, info, soname, add_needed); |
4ad4eba5 AM |
3909 | if (ret < 0) |
3910 | goto error_return; | |
3911 | ||
3912 | /* If we have already included this dynamic object in the | |
3913 | link, just ignore it. There is no reason to include a | |
3914 | particular dynamic object more than once. */ | |
3915 | if (ret > 0) | |
3916 | return TRUE; | |
7ee314fa AM |
3917 | |
3918 | /* Save the DT_AUDIT entry for the linker emulation code. */ | |
68ffbac6 | 3919 | elf_dt_audit (abfd) = audit; |
4ad4eba5 AM |
3920 | } |
3921 | ||
3922 | /* If this is a dynamic object, we always link against the .dynsym | |
3923 | symbol table, not the .symtab symbol table. The dynamic linker | |
3924 | will only see the .dynsym symbol table, so there is no reason to | |
3925 | look at .symtab for a dynamic object. */ | |
3926 | ||
3927 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
3928 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
3929 | else | |
3930 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
3931 | ||
3932 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
3933 | ||
3934 | /* The sh_info field of the symtab header tells us where the | |
3935 | external symbols start. We don't care about the local symbols at | |
3936 | this point. */ | |
3937 | if (elf_bad_symtab (abfd)) | |
3938 | { | |
3939 | extsymcount = symcount; | |
3940 | extsymoff = 0; | |
3941 | } | |
3942 | else | |
3943 | { | |
3944 | extsymcount = symcount - hdr->sh_info; | |
3945 | extsymoff = hdr->sh_info; | |
3946 | } | |
3947 | ||
f45794cb | 3948 | sym_hash = elf_sym_hashes (abfd); |
012b2306 | 3949 | if (extsymcount != 0) |
4ad4eba5 AM |
3950 | { |
3951 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
3952 | NULL, NULL, NULL); | |
3953 | if (isymbuf == NULL) | |
3954 | goto error_return; | |
3955 | ||
4ad4eba5 | 3956 | if (sym_hash == NULL) |
012b2306 AM |
3957 | { |
3958 | /* We store a pointer to the hash table entry for each | |
3959 | external symbol. */ | |
3960 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
3961 | sym_hash = (struct elf_link_hash_entry **) bfd_zalloc (abfd, amt); | |
3962 | if (sym_hash == NULL) | |
3963 | goto error_free_sym; | |
3964 | elf_sym_hashes (abfd) = sym_hash; | |
3965 | } | |
4ad4eba5 AM |
3966 | } |
3967 | ||
3968 | if (dynamic) | |
3969 | { | |
3970 | /* Read in any version definitions. */ | |
fc0e6df6 PB |
3971 | if (!_bfd_elf_slurp_version_tables (abfd, |
3972 | info->default_imported_symver)) | |
4ad4eba5 AM |
3973 | goto error_free_sym; |
3974 | ||
3975 | /* Read in the symbol versions, but don't bother to convert them | |
3976 | to internal format. */ | |
3977 | if (elf_dynversym (abfd) != 0) | |
3978 | { | |
3979 | Elf_Internal_Shdr *versymhdr; | |
3980 | ||
3981 | versymhdr = &elf_tdata (abfd)->dynversym_hdr; | |
a50b1753 | 3982 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); |
4ad4eba5 AM |
3983 | if (extversym == NULL) |
3984 | goto error_free_sym; | |
3985 | amt = versymhdr->sh_size; | |
3986 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0 | |
3987 | || bfd_bread (extversym, amt, abfd) != amt) | |
3988 | goto error_free_vers; | |
3989 | } | |
3990 | } | |
3991 | ||
66eb6687 AM |
3992 | /* If we are loading an as-needed shared lib, save the symbol table |
3993 | state before we start adding symbols. If the lib turns out | |
3994 | to be unneeded, restore the state. */ | |
3995 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
3996 | { | |
3997 | unsigned int i; | |
3998 | size_t entsize; | |
3999 | ||
4000 | for (entsize = 0, i = 0; i < htab->root.table.size; i++) | |
4001 | { | |
4002 | struct bfd_hash_entry *p; | |
2de92251 | 4003 | struct elf_link_hash_entry *h; |
66eb6687 AM |
4004 | |
4005 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
2de92251 AM |
4006 | { |
4007 | h = (struct elf_link_hash_entry *) p; | |
4008 | entsize += htab->root.table.entsize; | |
4009 | if (h->root.type == bfd_link_hash_warning) | |
4010 | entsize += htab->root.table.entsize; | |
4011 | } | |
66eb6687 AM |
4012 | } |
4013 | ||
4014 | tabsize = htab->root.table.size * sizeof (struct bfd_hash_entry *); | |
f45794cb | 4015 | old_tab = bfd_malloc (tabsize + entsize); |
66eb6687 AM |
4016 | if (old_tab == NULL) |
4017 | goto error_free_vers; | |
4018 | ||
4019 | /* Remember the current objalloc pointer, so that all mem for | |
4020 | symbols added can later be reclaimed. */ | |
4021 | alloc_mark = bfd_hash_allocate (&htab->root.table, 1); | |
4022 | if (alloc_mark == NULL) | |
4023 | goto error_free_vers; | |
4024 | ||
5061a885 AM |
4025 | /* Make a special call to the linker "notice" function to |
4026 | tell it that we are about to handle an as-needed lib. */ | |
e5034e59 | 4027 | if (!(*bed->notice_as_needed) (abfd, info, notice_as_needed)) |
9af2a943 | 4028 | goto error_free_vers; |
5061a885 | 4029 | |
f45794cb AM |
4030 | /* Clone the symbol table. Remember some pointers into the |
4031 | symbol table, and dynamic symbol count. */ | |
4032 | old_ent = (char *) old_tab + tabsize; | |
66eb6687 | 4033 | memcpy (old_tab, htab->root.table.table, tabsize); |
66eb6687 AM |
4034 | old_undefs = htab->root.undefs; |
4035 | old_undefs_tail = htab->root.undefs_tail; | |
4f87808c AM |
4036 | old_table = htab->root.table.table; |
4037 | old_size = htab->root.table.size; | |
4038 | old_count = htab->root.table.count; | |
66eb6687 | 4039 | old_dynsymcount = htab->dynsymcount; |
a4542f1b | 4040 | old_dynstr_size = _bfd_elf_strtab_size (htab->dynstr); |
66eb6687 AM |
4041 | |
4042 | for (i = 0; i < htab->root.table.size; i++) | |
4043 | { | |
4044 | struct bfd_hash_entry *p; | |
2de92251 | 4045 | struct elf_link_hash_entry *h; |
66eb6687 AM |
4046 | |
4047 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
4048 | { | |
4049 | memcpy (old_ent, p, htab->root.table.entsize); | |
4050 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
4051 | h = (struct elf_link_hash_entry *) p; |
4052 | if (h->root.type == bfd_link_hash_warning) | |
4053 | { | |
4054 | memcpy (old_ent, h->root.u.i.link, htab->root.table.entsize); | |
4055 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
4056 | } | |
66eb6687 AM |
4057 | } |
4058 | } | |
4059 | } | |
4ad4eba5 | 4060 | |
66eb6687 | 4061 | weaks = NULL; |
4ad4eba5 AM |
4062 | ever = extversym != NULL ? extversym + extsymoff : NULL; |
4063 | for (isym = isymbuf, isymend = isymbuf + extsymcount; | |
4064 | isym < isymend; | |
4065 | isym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
4066 | { | |
4067 | int bind; | |
4068 | bfd_vma value; | |
af44c138 | 4069 | asection *sec, *new_sec; |
4ad4eba5 AM |
4070 | flagword flags; |
4071 | const char *name; | |
4072 | struct elf_link_hash_entry *h; | |
90c984fc | 4073 | struct elf_link_hash_entry *hi; |
4ad4eba5 AM |
4074 | bfd_boolean definition; |
4075 | bfd_boolean size_change_ok; | |
4076 | bfd_boolean type_change_ok; | |
4077 | bfd_boolean new_weakdef; | |
37a9e49a L |
4078 | bfd_boolean new_weak; |
4079 | bfd_boolean old_weak; | |
4ad4eba5 | 4080 | bfd_boolean override; |
a4d8e49b | 4081 | bfd_boolean common; |
97196564 | 4082 | bfd_boolean discarded; |
4ad4eba5 AM |
4083 | unsigned int old_alignment; |
4084 | bfd *old_bfd; | |
6e33951e | 4085 | bfd_boolean matched; |
4ad4eba5 AM |
4086 | |
4087 | override = FALSE; | |
4088 | ||
4089 | flags = BSF_NO_FLAGS; | |
4090 | sec = NULL; | |
4091 | value = isym->st_value; | |
a4d8e49b | 4092 | common = bed->common_definition (isym); |
97196564 | 4093 | discarded = FALSE; |
4ad4eba5 AM |
4094 | |
4095 | bind = ELF_ST_BIND (isym->st_info); | |
3e7a7d11 | 4096 | switch (bind) |
4ad4eba5 | 4097 | { |
3e7a7d11 | 4098 | case STB_LOCAL: |
4ad4eba5 AM |
4099 | /* This should be impossible, since ELF requires that all |
4100 | global symbols follow all local symbols, and that sh_info | |
4101 | point to the first global symbol. Unfortunately, Irix 5 | |
4102 | screws this up. */ | |
4103 | continue; | |
3e7a7d11 NC |
4104 | |
4105 | case STB_GLOBAL: | |
a4d8e49b | 4106 | if (isym->st_shndx != SHN_UNDEF && !common) |
4ad4eba5 | 4107 | flags = BSF_GLOBAL; |
3e7a7d11 NC |
4108 | break; |
4109 | ||
4110 | case STB_WEAK: | |
4111 | flags = BSF_WEAK; | |
4112 | break; | |
4113 | ||
4114 | case STB_GNU_UNIQUE: | |
4115 | flags = BSF_GNU_UNIQUE; | |
4116 | break; | |
4117 | ||
4118 | default: | |
4ad4eba5 | 4119 | /* Leave it up to the processor backend. */ |
3e7a7d11 | 4120 | break; |
4ad4eba5 AM |
4121 | } |
4122 | ||
4123 | if (isym->st_shndx == SHN_UNDEF) | |
4124 | sec = bfd_und_section_ptr; | |
cb33740c AM |
4125 | else if (isym->st_shndx == SHN_ABS) |
4126 | sec = bfd_abs_section_ptr; | |
4127 | else if (isym->st_shndx == SHN_COMMON) | |
4128 | { | |
4129 | sec = bfd_com_section_ptr; | |
4130 | /* What ELF calls the size we call the value. What ELF | |
4131 | calls the value we call the alignment. */ | |
4132 | value = isym->st_size; | |
4133 | } | |
4134 | else | |
4ad4eba5 AM |
4135 | { |
4136 | sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
4137 | if (sec == NULL) | |
4138 | sec = bfd_abs_section_ptr; | |
dbaa2011 | 4139 | else if (discarded_section (sec)) |
529fcb95 | 4140 | { |
e5d08002 L |
4141 | /* Symbols from discarded section are undefined. We keep |
4142 | its visibility. */ | |
529fcb95 | 4143 | sec = bfd_und_section_ptr; |
97196564 | 4144 | discarded = TRUE; |
529fcb95 PB |
4145 | isym->st_shndx = SHN_UNDEF; |
4146 | } | |
4ad4eba5 AM |
4147 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
4148 | value -= sec->vma; | |
4149 | } | |
4ad4eba5 AM |
4150 | |
4151 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
4152 | isym->st_name); | |
4153 | if (name == NULL) | |
4154 | goto error_free_vers; | |
4155 | ||
4156 | if (isym->st_shndx == SHN_COMMON | |
02d00247 AM |
4157 | && (abfd->flags & BFD_PLUGIN) != 0) |
4158 | { | |
4159 | asection *xc = bfd_get_section_by_name (abfd, "COMMON"); | |
4160 | ||
4161 | if (xc == NULL) | |
4162 | { | |
4163 | flagword sflags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP | |
4164 | | SEC_EXCLUDE); | |
4165 | xc = bfd_make_section_with_flags (abfd, "COMMON", sflags); | |
4166 | if (xc == NULL) | |
4167 | goto error_free_vers; | |
4168 | } | |
4169 | sec = xc; | |
4170 | } | |
4171 | else if (isym->st_shndx == SHN_COMMON | |
4172 | && ELF_ST_TYPE (isym->st_info) == STT_TLS | |
0e1862bb | 4173 | && !bfd_link_relocatable (info)) |
4ad4eba5 AM |
4174 | { |
4175 | asection *tcomm = bfd_get_section_by_name (abfd, ".tcommon"); | |
4176 | ||
4177 | if (tcomm == NULL) | |
4178 | { | |
02d00247 AM |
4179 | flagword sflags = (SEC_ALLOC | SEC_THREAD_LOCAL | SEC_IS_COMMON |
4180 | | SEC_LINKER_CREATED); | |
4181 | tcomm = bfd_make_section_with_flags (abfd, ".tcommon", sflags); | |
3496cb2a | 4182 | if (tcomm == NULL) |
4ad4eba5 AM |
4183 | goto error_free_vers; |
4184 | } | |
4185 | sec = tcomm; | |
4186 | } | |
66eb6687 | 4187 | else if (bed->elf_add_symbol_hook) |
4ad4eba5 | 4188 | { |
66eb6687 AM |
4189 | if (! (*bed->elf_add_symbol_hook) (abfd, info, isym, &name, &flags, |
4190 | &sec, &value)) | |
4ad4eba5 AM |
4191 | goto error_free_vers; |
4192 | ||
4193 | /* The hook function sets the name to NULL if this symbol | |
4194 | should be skipped for some reason. */ | |
4195 | if (name == NULL) | |
4196 | continue; | |
4197 | } | |
4198 | ||
4199 | /* Sanity check that all possibilities were handled. */ | |
4200 | if (sec == NULL) | |
4201 | { | |
4202 | bfd_set_error (bfd_error_bad_value); | |
4203 | goto error_free_vers; | |
4204 | } | |
4205 | ||
191c0c42 AM |
4206 | /* Silently discard TLS symbols from --just-syms. There's |
4207 | no way to combine a static TLS block with a new TLS block | |
4208 | for this executable. */ | |
4209 | if (ELF_ST_TYPE (isym->st_info) == STT_TLS | |
4210 | && sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
4211 | continue; | |
4212 | ||
4ad4eba5 AM |
4213 | if (bfd_is_und_section (sec) |
4214 | || bfd_is_com_section (sec)) | |
4215 | definition = FALSE; | |
4216 | else | |
4217 | definition = TRUE; | |
4218 | ||
4219 | size_change_ok = FALSE; | |
66eb6687 | 4220 | type_change_ok = bed->type_change_ok; |
37a9e49a | 4221 | old_weak = FALSE; |
6e33951e | 4222 | matched = FALSE; |
4ad4eba5 AM |
4223 | old_alignment = 0; |
4224 | old_bfd = NULL; | |
af44c138 | 4225 | new_sec = sec; |
4ad4eba5 | 4226 | |
66eb6687 | 4227 | if (is_elf_hash_table (htab)) |
4ad4eba5 AM |
4228 | { |
4229 | Elf_Internal_Versym iver; | |
4230 | unsigned int vernum = 0; | |
4231 | bfd_boolean skip; | |
4232 | ||
fc0e6df6 | 4233 | if (ever == NULL) |
4ad4eba5 | 4234 | { |
fc0e6df6 PB |
4235 | if (info->default_imported_symver) |
4236 | /* Use the default symbol version created earlier. */ | |
4237 | iver.vs_vers = elf_tdata (abfd)->cverdefs; | |
4238 | else | |
4239 | iver.vs_vers = 0; | |
4240 | } | |
4241 | else | |
4242 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
4243 | ||
4244 | vernum = iver.vs_vers & VERSYM_VERSION; | |
4245 | ||
4246 | /* If this is a hidden symbol, or if it is not version | |
4247 | 1, we append the version name to the symbol name. | |
cc86ff91 EB |
4248 | However, we do not modify a non-hidden absolute symbol |
4249 | if it is not a function, because it might be the version | |
4250 | symbol itself. FIXME: What if it isn't? */ | |
fc0e6df6 | 4251 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 |
fcb93ecf PB |
4252 | || (vernum > 1 |
4253 | && (!bfd_is_abs_section (sec) | |
4254 | || bed->is_function_type (ELF_ST_TYPE (isym->st_info))))) | |
fc0e6df6 PB |
4255 | { |
4256 | const char *verstr; | |
4257 | size_t namelen, verlen, newlen; | |
4258 | char *newname, *p; | |
4259 | ||
4260 | if (isym->st_shndx != SHN_UNDEF) | |
4ad4eba5 | 4261 | { |
fc0e6df6 PB |
4262 | if (vernum > elf_tdata (abfd)->cverdefs) |
4263 | verstr = NULL; | |
4264 | else if (vernum > 1) | |
4265 | verstr = | |
4266 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
4267 | else | |
4268 | verstr = ""; | |
4ad4eba5 | 4269 | |
fc0e6df6 | 4270 | if (verstr == NULL) |
4ad4eba5 | 4271 | { |
fc0e6df6 PB |
4272 | (*_bfd_error_handler) |
4273 | (_("%B: %s: invalid version %u (max %d)"), | |
4274 | abfd, name, vernum, | |
4275 | elf_tdata (abfd)->cverdefs); | |
4276 | bfd_set_error (bfd_error_bad_value); | |
4277 | goto error_free_vers; | |
4ad4eba5 | 4278 | } |
fc0e6df6 PB |
4279 | } |
4280 | else | |
4281 | { | |
4282 | /* We cannot simply test for the number of | |
4283 | entries in the VERNEED section since the | |
4284 | numbers for the needed versions do not start | |
4285 | at 0. */ | |
4286 | Elf_Internal_Verneed *t; | |
4287 | ||
4288 | verstr = NULL; | |
4289 | for (t = elf_tdata (abfd)->verref; | |
4290 | t != NULL; | |
4291 | t = t->vn_nextref) | |
4ad4eba5 | 4292 | { |
fc0e6df6 | 4293 | Elf_Internal_Vernaux *a; |
4ad4eba5 | 4294 | |
fc0e6df6 PB |
4295 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) |
4296 | { | |
4297 | if (a->vna_other == vernum) | |
4ad4eba5 | 4298 | { |
fc0e6df6 PB |
4299 | verstr = a->vna_nodename; |
4300 | break; | |
4ad4eba5 | 4301 | } |
4ad4eba5 | 4302 | } |
fc0e6df6 PB |
4303 | if (a != NULL) |
4304 | break; | |
4305 | } | |
4306 | if (verstr == NULL) | |
4307 | { | |
4308 | (*_bfd_error_handler) | |
4309 | (_("%B: %s: invalid needed version %d"), | |
4310 | abfd, name, vernum); | |
4311 | bfd_set_error (bfd_error_bad_value); | |
4312 | goto error_free_vers; | |
4ad4eba5 | 4313 | } |
4ad4eba5 | 4314 | } |
fc0e6df6 PB |
4315 | |
4316 | namelen = strlen (name); | |
4317 | verlen = strlen (verstr); | |
4318 | newlen = namelen + verlen + 2; | |
4319 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4320 | && isym->st_shndx != SHN_UNDEF) | |
4321 | ++newlen; | |
4322 | ||
a50b1753 | 4323 | newname = (char *) bfd_hash_allocate (&htab->root.table, newlen); |
fc0e6df6 PB |
4324 | if (newname == NULL) |
4325 | goto error_free_vers; | |
4326 | memcpy (newname, name, namelen); | |
4327 | p = newname + namelen; | |
4328 | *p++ = ELF_VER_CHR; | |
4329 | /* If this is a defined non-hidden version symbol, | |
4330 | we add another @ to the name. This indicates the | |
4331 | default version of the symbol. */ | |
4332 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4333 | && isym->st_shndx != SHN_UNDEF) | |
4334 | *p++ = ELF_VER_CHR; | |
4335 | memcpy (p, verstr, verlen + 1); | |
4336 | ||
4337 | name = newname; | |
4ad4eba5 AM |
4338 | } |
4339 | ||
cd3416da AM |
4340 | /* If this symbol has default visibility and the user has |
4341 | requested we not re-export it, then mark it as hidden. */ | |
a0d49154 | 4342 | if (!bfd_is_und_section (sec) |
cd3416da | 4343 | && !dynamic |
ce875075 | 4344 | && abfd->no_export |
cd3416da AM |
4345 | && ELF_ST_VISIBILITY (isym->st_other) != STV_INTERNAL) |
4346 | isym->st_other = (STV_HIDDEN | |
4347 | | (isym->st_other & ~ELF_ST_VISIBILITY (-1))); | |
4348 | ||
4f3fedcf AM |
4349 | if (!_bfd_elf_merge_symbol (abfd, info, name, isym, &sec, &value, |
4350 | sym_hash, &old_bfd, &old_weak, | |
4351 | &old_alignment, &skip, &override, | |
6e33951e L |
4352 | &type_change_ok, &size_change_ok, |
4353 | &matched)) | |
4ad4eba5 AM |
4354 | goto error_free_vers; |
4355 | ||
4356 | if (skip) | |
4357 | continue; | |
4358 | ||
6e33951e L |
4359 | /* Override a definition only if the new symbol matches the |
4360 | existing one. */ | |
4361 | if (override && matched) | |
4ad4eba5 AM |
4362 | definition = FALSE; |
4363 | ||
4364 | h = *sym_hash; | |
4365 | while (h->root.type == bfd_link_hash_indirect | |
4366 | || h->root.type == bfd_link_hash_warning) | |
4367 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4368 | ||
4ad4eba5 | 4369 | if (elf_tdata (abfd)->verdef != NULL |
4ad4eba5 AM |
4370 | && vernum > 1 |
4371 | && definition) | |
4372 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
4373 | } | |
4374 | ||
4375 | if (! (_bfd_generic_link_add_one_symbol | |
66eb6687 | 4376 | (info, abfd, name, flags, sec, value, NULL, FALSE, bed->collect, |
4ad4eba5 AM |
4377 | (struct bfd_link_hash_entry **) sym_hash))) |
4378 | goto error_free_vers; | |
4379 | ||
a43942db MR |
4380 | if ((flags & BSF_GNU_UNIQUE) |
4381 | && (abfd->flags & DYNAMIC) == 0 | |
4382 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
4383 | elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_unique; | |
4384 | ||
4ad4eba5 | 4385 | h = *sym_hash; |
90c984fc L |
4386 | /* We need to make sure that indirect symbol dynamic flags are |
4387 | updated. */ | |
4388 | hi = h; | |
4ad4eba5 AM |
4389 | while (h->root.type == bfd_link_hash_indirect |
4390 | || h->root.type == bfd_link_hash_warning) | |
4391 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3e7a7d11 | 4392 | |
97196564 L |
4393 | /* Setting the index to -3 tells elf_link_output_extsym that |
4394 | this symbol is defined in a discarded section. */ | |
4395 | if (discarded) | |
4396 | h->indx = -3; | |
4397 | ||
4ad4eba5 AM |
4398 | *sym_hash = h; |
4399 | ||
37a9e49a | 4400 | new_weak = (flags & BSF_WEAK) != 0; |
4ad4eba5 AM |
4401 | new_weakdef = FALSE; |
4402 | if (dynamic | |
4403 | && definition | |
37a9e49a | 4404 | && new_weak |
fcb93ecf | 4405 | && !bed->is_function_type (ELF_ST_TYPE (isym->st_info)) |
66eb6687 | 4406 | && is_elf_hash_table (htab) |
f6e332e6 | 4407 | && h->u.weakdef == NULL) |
4ad4eba5 AM |
4408 | { |
4409 | /* Keep a list of all weak defined non function symbols from | |
4410 | a dynamic object, using the weakdef field. Later in this | |
4411 | function we will set the weakdef field to the correct | |
4412 | value. We only put non-function symbols from dynamic | |
4413 | objects on this list, because that happens to be the only | |
4414 | time we need to know the normal symbol corresponding to a | |
4415 | weak symbol, and the information is time consuming to | |
4416 | figure out. If the weakdef field is not already NULL, | |
4417 | then this symbol was already defined by some previous | |
4418 | dynamic object, and we will be using that previous | |
4419 | definition anyhow. */ | |
4420 | ||
f6e332e6 | 4421 | h->u.weakdef = weaks; |
4ad4eba5 AM |
4422 | weaks = h; |
4423 | new_weakdef = TRUE; | |
4424 | } | |
4425 | ||
4426 | /* Set the alignment of a common symbol. */ | |
a4d8e49b | 4427 | if ((common || bfd_is_com_section (sec)) |
4ad4eba5 AM |
4428 | && h->root.type == bfd_link_hash_common) |
4429 | { | |
4430 | unsigned int align; | |
4431 | ||
a4d8e49b | 4432 | if (common) |
af44c138 L |
4433 | align = bfd_log2 (isym->st_value); |
4434 | else | |
4435 | { | |
4436 | /* The new symbol is a common symbol in a shared object. | |
4437 | We need to get the alignment from the section. */ | |
4438 | align = new_sec->alignment_power; | |
4439 | } | |
595213d4 | 4440 | if (align > old_alignment) |
4ad4eba5 AM |
4441 | h->root.u.c.p->alignment_power = align; |
4442 | else | |
4443 | h->root.u.c.p->alignment_power = old_alignment; | |
4444 | } | |
4445 | ||
66eb6687 | 4446 | if (is_elf_hash_table (htab)) |
4ad4eba5 | 4447 | { |
4f3fedcf AM |
4448 | /* Set a flag in the hash table entry indicating the type of |
4449 | reference or definition we just found. A dynamic symbol | |
4450 | is one which is referenced or defined by both a regular | |
4451 | object and a shared object. */ | |
4452 | bfd_boolean dynsym = FALSE; | |
4453 | ||
4454 | /* Plugin symbols aren't normal. Don't set def_regular or | |
4455 | ref_regular for them, or make them dynamic. */ | |
4456 | if ((abfd->flags & BFD_PLUGIN) != 0) | |
4457 | ; | |
4458 | else if (! dynamic) | |
4459 | { | |
4460 | if (! definition) | |
4461 | { | |
4462 | h->ref_regular = 1; | |
4463 | if (bind != STB_WEAK) | |
4464 | h->ref_regular_nonweak = 1; | |
4465 | } | |
4466 | else | |
4467 | { | |
4468 | h->def_regular = 1; | |
4469 | if (h->def_dynamic) | |
4470 | { | |
4471 | h->def_dynamic = 0; | |
4472 | h->ref_dynamic = 1; | |
4473 | } | |
4474 | } | |
4475 | ||
4476 | /* If the indirect symbol has been forced local, don't | |
4477 | make the real symbol dynamic. */ | |
4478 | if ((h == hi || !hi->forced_local) | |
0e1862bb | 4479 | && (bfd_link_dll (info) |
4f3fedcf AM |
4480 | || h->def_dynamic |
4481 | || h->ref_dynamic)) | |
4482 | dynsym = TRUE; | |
4483 | } | |
4484 | else | |
4485 | { | |
4486 | if (! definition) | |
4487 | { | |
4488 | h->ref_dynamic = 1; | |
4489 | hi->ref_dynamic = 1; | |
4490 | } | |
4491 | else | |
4492 | { | |
4493 | h->def_dynamic = 1; | |
4494 | hi->def_dynamic = 1; | |
4495 | } | |
4496 | ||
4497 | /* If the indirect symbol has been forced local, don't | |
4498 | make the real symbol dynamic. */ | |
4499 | if ((h == hi || !hi->forced_local) | |
4500 | && (h->def_regular | |
4501 | || h->ref_regular | |
4502 | || (h->u.weakdef != NULL | |
4503 | && ! new_weakdef | |
4504 | && h->u.weakdef->dynindx != -1))) | |
4505 | dynsym = TRUE; | |
4506 | } | |
4507 | ||
4508 | /* Check to see if we need to add an indirect symbol for | |
4509 | the default name. */ | |
4510 | if (definition | |
4511 | || (!override && h->root.type == bfd_link_hash_common)) | |
4512 | if (!_bfd_elf_add_default_symbol (abfd, info, h, name, isym, | |
4513 | sec, value, &old_bfd, &dynsym)) | |
4514 | goto error_free_vers; | |
4ad4eba5 AM |
4515 | |
4516 | /* Check the alignment when a common symbol is involved. This | |
4517 | can change when a common symbol is overridden by a normal | |
4518 | definition or a common symbol is ignored due to the old | |
4519 | normal definition. We need to make sure the maximum | |
4520 | alignment is maintained. */ | |
a4d8e49b | 4521 | if ((old_alignment || common) |
4ad4eba5 AM |
4522 | && h->root.type != bfd_link_hash_common) |
4523 | { | |
4524 | unsigned int common_align; | |
4525 | unsigned int normal_align; | |
4526 | unsigned int symbol_align; | |
4527 | bfd *normal_bfd; | |
4528 | bfd *common_bfd; | |
4529 | ||
3a81e825 AM |
4530 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
4531 | || h->root.type == bfd_link_hash_defweak); | |
4532 | ||
4ad4eba5 AM |
4533 | symbol_align = ffs (h->root.u.def.value) - 1; |
4534 | if (h->root.u.def.section->owner != NULL | |
4535 | && (h->root.u.def.section->owner->flags & DYNAMIC) == 0) | |
4536 | { | |
4537 | normal_align = h->root.u.def.section->alignment_power; | |
4538 | if (normal_align > symbol_align) | |
4539 | normal_align = symbol_align; | |
4540 | } | |
4541 | else | |
4542 | normal_align = symbol_align; | |
4543 | ||
4544 | if (old_alignment) | |
4545 | { | |
4546 | common_align = old_alignment; | |
4547 | common_bfd = old_bfd; | |
4548 | normal_bfd = abfd; | |
4549 | } | |
4550 | else | |
4551 | { | |
4552 | common_align = bfd_log2 (isym->st_value); | |
4553 | common_bfd = abfd; | |
4554 | normal_bfd = old_bfd; | |
4555 | } | |
4556 | ||
4557 | if (normal_align < common_align) | |
d07676f8 NC |
4558 | { |
4559 | /* PR binutils/2735 */ | |
4560 | if (normal_bfd == NULL) | |
4561 | (*_bfd_error_handler) | |
4f3fedcf AM |
4562 | (_("Warning: alignment %u of common symbol `%s' in %B is" |
4563 | " greater than the alignment (%u) of its section %A"), | |
d07676f8 NC |
4564 | common_bfd, h->root.u.def.section, |
4565 | 1 << common_align, name, 1 << normal_align); | |
4566 | else | |
4567 | (*_bfd_error_handler) | |
4568 | (_("Warning: alignment %u of symbol `%s' in %B" | |
4569 | " is smaller than %u in %B"), | |
4570 | normal_bfd, common_bfd, | |
4571 | 1 << normal_align, name, 1 << common_align); | |
4572 | } | |
4ad4eba5 AM |
4573 | } |
4574 | ||
83ad0046 | 4575 | /* Remember the symbol size if it isn't undefined. */ |
3a81e825 AM |
4576 | if (isym->st_size != 0 |
4577 | && isym->st_shndx != SHN_UNDEF | |
4ad4eba5 AM |
4578 | && (definition || h->size == 0)) |
4579 | { | |
83ad0046 L |
4580 | if (h->size != 0 |
4581 | && h->size != isym->st_size | |
4582 | && ! size_change_ok) | |
4ad4eba5 | 4583 | (*_bfd_error_handler) |
d003868e AM |
4584 | (_("Warning: size of symbol `%s' changed" |
4585 | " from %lu in %B to %lu in %B"), | |
4586 | old_bfd, abfd, | |
4ad4eba5 | 4587 | name, (unsigned long) h->size, |
d003868e | 4588 | (unsigned long) isym->st_size); |
4ad4eba5 AM |
4589 | |
4590 | h->size = isym->st_size; | |
4591 | } | |
4592 | ||
4593 | /* If this is a common symbol, then we always want H->SIZE | |
4594 | to be the size of the common symbol. The code just above | |
4595 | won't fix the size if a common symbol becomes larger. We | |
4596 | don't warn about a size change here, because that is | |
4f3fedcf | 4597 | covered by --warn-common. Allow changes between different |
fcb93ecf | 4598 | function types. */ |
4ad4eba5 AM |
4599 | if (h->root.type == bfd_link_hash_common) |
4600 | h->size = h->root.u.c.size; | |
4601 | ||
4602 | if (ELF_ST_TYPE (isym->st_info) != STT_NOTYPE | |
37a9e49a L |
4603 | && ((definition && !new_weak) |
4604 | || (old_weak && h->root.type == bfd_link_hash_common) | |
4605 | || h->type == STT_NOTYPE)) | |
4ad4eba5 | 4606 | { |
2955ec4c L |
4607 | unsigned int type = ELF_ST_TYPE (isym->st_info); |
4608 | ||
4609 | /* Turn an IFUNC symbol from a DSO into a normal FUNC | |
4610 | symbol. */ | |
4611 | if (type == STT_GNU_IFUNC | |
4612 | && (abfd->flags & DYNAMIC) != 0) | |
4613 | type = STT_FUNC; | |
4ad4eba5 | 4614 | |
2955ec4c L |
4615 | if (h->type != type) |
4616 | { | |
4617 | if (h->type != STT_NOTYPE && ! type_change_ok) | |
4618 | (*_bfd_error_handler) | |
4619 | (_("Warning: type of symbol `%s' changed" | |
4620 | " from %d to %d in %B"), | |
4621 | abfd, name, h->type, type); | |
4622 | ||
4623 | h->type = type; | |
4624 | } | |
4ad4eba5 AM |
4625 | } |
4626 | ||
54ac0771 | 4627 | /* Merge st_other field. */ |
b8417128 | 4628 | elf_merge_st_other (abfd, h, isym, sec, definition, dynamic); |
4ad4eba5 | 4629 | |
c3df8c14 | 4630 | /* We don't want to make debug symbol dynamic. */ |
0e1862bb L |
4631 | if (definition |
4632 | && (sec->flags & SEC_DEBUGGING) | |
4633 | && !bfd_link_relocatable (info)) | |
c3df8c14 AM |
4634 | dynsym = FALSE; |
4635 | ||
4f3fedcf AM |
4636 | /* Nor should we make plugin symbols dynamic. */ |
4637 | if ((abfd->flags & BFD_PLUGIN) != 0) | |
4638 | dynsym = FALSE; | |
4639 | ||
35fc36a8 | 4640 | if (definition) |
35399224 L |
4641 | { |
4642 | h->target_internal = isym->st_target_internal; | |
4643 | h->unique_global = (flags & BSF_GNU_UNIQUE) != 0; | |
4644 | } | |
35fc36a8 | 4645 | |
4ad4eba5 AM |
4646 | if (definition && !dynamic) |
4647 | { | |
4648 | char *p = strchr (name, ELF_VER_CHR); | |
4649 | if (p != NULL && p[1] != ELF_VER_CHR) | |
4650 | { | |
4651 | /* Queue non-default versions so that .symver x, x@FOO | |
4652 | aliases can be checked. */ | |
66eb6687 | 4653 | if (!nondeflt_vers) |
4ad4eba5 | 4654 | { |
66eb6687 AM |
4655 | amt = ((isymend - isym + 1) |
4656 | * sizeof (struct elf_link_hash_entry *)); | |
ca4be51c AM |
4657 | nondeflt_vers |
4658 | = (struct elf_link_hash_entry **) bfd_malloc (amt); | |
14b1c01e AM |
4659 | if (!nondeflt_vers) |
4660 | goto error_free_vers; | |
4ad4eba5 | 4661 | } |
66eb6687 | 4662 | nondeflt_vers[nondeflt_vers_cnt++] = h; |
4ad4eba5 AM |
4663 | } |
4664 | } | |
4665 | ||
4666 | if (dynsym && h->dynindx == -1) | |
4667 | { | |
c152c796 | 4668 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4ad4eba5 | 4669 | goto error_free_vers; |
f6e332e6 | 4670 | if (h->u.weakdef != NULL |
4ad4eba5 | 4671 | && ! new_weakdef |
f6e332e6 | 4672 | && h->u.weakdef->dynindx == -1) |
4ad4eba5 | 4673 | { |
66eb6687 | 4674 | if (!bfd_elf_link_record_dynamic_symbol (info, h->u.weakdef)) |
4ad4eba5 AM |
4675 | goto error_free_vers; |
4676 | } | |
4677 | } | |
1f599d0e | 4678 | else if (h->dynindx != -1) |
4ad4eba5 AM |
4679 | /* If the symbol already has a dynamic index, but |
4680 | visibility says it should not be visible, turn it into | |
4681 | a local symbol. */ | |
4682 | switch (ELF_ST_VISIBILITY (h->other)) | |
4683 | { | |
4684 | case STV_INTERNAL: | |
4685 | case STV_HIDDEN: | |
4686 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
4687 | dynsym = FALSE; | |
4688 | break; | |
4689 | } | |
4690 | ||
aef28989 L |
4691 | /* Don't add DT_NEEDED for references from the dummy bfd nor |
4692 | for unmatched symbol. */ | |
4ad4eba5 | 4693 | if (!add_needed |
aef28989 | 4694 | && matched |
4ad4eba5 | 4695 | && definition |
010e5ae2 | 4696 | && ((dynsym |
ffa9430d | 4697 | && h->ref_regular_nonweak |
4f3fedcf AM |
4698 | && (old_bfd == NULL |
4699 | || (old_bfd->flags & BFD_PLUGIN) == 0)) | |
ffa9430d | 4700 | || (h->ref_dynamic_nonweak |
010e5ae2 | 4701 | && (elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0 |
7b15fa7a AM |
4702 | && !on_needed_list (elf_dt_name (abfd), |
4703 | htab->needed, NULL)))) | |
4ad4eba5 AM |
4704 | { |
4705 | int ret; | |
4706 | const char *soname = elf_dt_name (abfd); | |
4707 | ||
16e4ecc0 AM |
4708 | info->callbacks->minfo ("%!", soname, old_bfd, |
4709 | h->root.root.string); | |
4710 | ||
4ad4eba5 AM |
4711 | /* A symbol from a library loaded via DT_NEEDED of some |
4712 | other library is referenced by a regular object. | |
e56f61be | 4713 | Add a DT_NEEDED entry for it. Issue an error if |
b918acf9 NC |
4714 | --no-add-needed is used and the reference was not |
4715 | a weak one. */ | |
4f3fedcf | 4716 | if (old_bfd != NULL |
b918acf9 | 4717 | && (elf_dyn_lib_class (abfd) & DYN_NO_NEEDED) != 0) |
e56f61be L |
4718 | { |
4719 | (*_bfd_error_handler) | |
3cbc5de0 | 4720 | (_("%B: undefined reference to symbol '%s'"), |
4f3fedcf | 4721 | old_bfd, name); |
ff5ac77b | 4722 | bfd_set_error (bfd_error_missing_dso); |
e56f61be L |
4723 | goto error_free_vers; |
4724 | } | |
4725 | ||
a50b1753 | 4726 | elf_dyn_lib_class (abfd) = (enum dynamic_lib_link_class) |
ca4be51c | 4727 | (elf_dyn_lib_class (abfd) & ~DYN_AS_NEEDED); |
a5db907e | 4728 | |
4ad4eba5 | 4729 | add_needed = TRUE; |
7e9f0867 | 4730 | ret = elf_add_dt_needed_tag (abfd, info, soname, add_needed); |
4ad4eba5 AM |
4731 | if (ret < 0) |
4732 | goto error_free_vers; | |
4733 | ||
4734 | BFD_ASSERT (ret == 0); | |
4735 | } | |
4736 | } | |
4737 | } | |
4738 | ||
66eb6687 AM |
4739 | if (extversym != NULL) |
4740 | { | |
4741 | free (extversym); | |
4742 | extversym = NULL; | |
4743 | } | |
4744 | ||
4745 | if (isymbuf != NULL) | |
4746 | { | |
4747 | free (isymbuf); | |
4748 | isymbuf = NULL; | |
4749 | } | |
4750 | ||
4751 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
4752 | { | |
4753 | unsigned int i; | |
4754 | ||
4755 | /* Restore the symbol table. */ | |
f45794cb AM |
4756 | old_ent = (char *) old_tab + tabsize; |
4757 | memset (elf_sym_hashes (abfd), 0, | |
4758 | extsymcount * sizeof (struct elf_link_hash_entry *)); | |
4f87808c AM |
4759 | htab->root.table.table = old_table; |
4760 | htab->root.table.size = old_size; | |
4761 | htab->root.table.count = old_count; | |
66eb6687 | 4762 | memcpy (htab->root.table.table, old_tab, tabsize); |
66eb6687 AM |
4763 | htab->root.undefs = old_undefs; |
4764 | htab->root.undefs_tail = old_undefs_tail; | |
d45f8bda | 4765 | _bfd_elf_strtab_restore_size (htab->dynstr, old_dynstr_size); |
66eb6687 AM |
4766 | for (i = 0; i < htab->root.table.size; i++) |
4767 | { | |
4768 | struct bfd_hash_entry *p; | |
4769 | struct elf_link_hash_entry *h; | |
3e0882af L |
4770 | bfd_size_type size; |
4771 | unsigned int alignment_power; | |
66eb6687 AM |
4772 | |
4773 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
4774 | { | |
4775 | h = (struct elf_link_hash_entry *) p; | |
2de92251 AM |
4776 | if (h->root.type == bfd_link_hash_warning) |
4777 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
a4542f1b AM |
4778 | if (h->dynindx >= old_dynsymcount |
4779 | && h->dynstr_index < old_dynstr_size) | |
66eb6687 | 4780 | _bfd_elf_strtab_delref (htab->dynstr, h->dynstr_index); |
2de92251 | 4781 | |
3e0882af L |
4782 | /* Preserve the maximum alignment and size for common |
4783 | symbols even if this dynamic lib isn't on DT_NEEDED | |
a4542f1b | 4784 | since it can still be loaded at run time by another |
3e0882af L |
4785 | dynamic lib. */ |
4786 | if (h->root.type == bfd_link_hash_common) | |
4787 | { | |
4788 | size = h->root.u.c.size; | |
4789 | alignment_power = h->root.u.c.p->alignment_power; | |
4790 | } | |
4791 | else | |
4792 | { | |
4793 | size = 0; | |
4794 | alignment_power = 0; | |
4795 | } | |
66eb6687 AM |
4796 | memcpy (p, old_ent, htab->root.table.entsize); |
4797 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
4798 | h = (struct elf_link_hash_entry *) p; |
4799 | if (h->root.type == bfd_link_hash_warning) | |
4800 | { | |
4801 | memcpy (h->root.u.i.link, old_ent, htab->root.table.entsize); | |
4802 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
a4542f1b | 4803 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
2de92251 | 4804 | } |
a4542f1b | 4805 | if (h->root.type == bfd_link_hash_common) |
3e0882af L |
4806 | { |
4807 | if (size > h->root.u.c.size) | |
4808 | h->root.u.c.size = size; | |
4809 | if (alignment_power > h->root.u.c.p->alignment_power) | |
4810 | h->root.u.c.p->alignment_power = alignment_power; | |
4811 | } | |
66eb6687 AM |
4812 | } |
4813 | } | |
4814 | ||
5061a885 AM |
4815 | /* Make a special call to the linker "notice" function to |
4816 | tell it that symbols added for crefs may need to be removed. */ | |
e5034e59 | 4817 | if (!(*bed->notice_as_needed) (abfd, info, notice_not_needed)) |
9af2a943 | 4818 | goto error_free_vers; |
5061a885 | 4819 | |
66eb6687 AM |
4820 | free (old_tab); |
4821 | objalloc_free_block ((struct objalloc *) htab->root.table.memory, | |
4822 | alloc_mark); | |
4823 | if (nondeflt_vers != NULL) | |
4824 | free (nondeflt_vers); | |
4825 | return TRUE; | |
4826 | } | |
2de92251 | 4827 | |
66eb6687 AM |
4828 | if (old_tab != NULL) |
4829 | { | |
e5034e59 | 4830 | if (!(*bed->notice_as_needed) (abfd, info, notice_needed)) |
9af2a943 | 4831 | goto error_free_vers; |
66eb6687 AM |
4832 | free (old_tab); |
4833 | old_tab = NULL; | |
4834 | } | |
4835 | ||
c6e8a9a8 L |
4836 | /* Now that all the symbols from this input file are created, if |
4837 | not performing a relocatable link, handle .symver foo, foo@BAR | |
4838 | such that any relocs against foo become foo@BAR. */ | |
0e1862bb | 4839 | if (!bfd_link_relocatable (info) && nondeflt_vers != NULL) |
4ad4eba5 AM |
4840 | { |
4841 | bfd_size_type cnt, symidx; | |
4842 | ||
4843 | for (cnt = 0; cnt < nondeflt_vers_cnt; ++cnt) | |
4844 | { | |
4845 | struct elf_link_hash_entry *h = nondeflt_vers[cnt], *hi; | |
4846 | char *shortname, *p; | |
4847 | ||
4848 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
4849 | if (p == NULL | |
4850 | || (h->root.type != bfd_link_hash_defined | |
4851 | && h->root.type != bfd_link_hash_defweak)) | |
4852 | continue; | |
4853 | ||
4854 | amt = p - h->root.root.string; | |
a50b1753 | 4855 | shortname = (char *) bfd_malloc (amt + 1); |
14b1c01e AM |
4856 | if (!shortname) |
4857 | goto error_free_vers; | |
4ad4eba5 AM |
4858 | memcpy (shortname, h->root.root.string, amt); |
4859 | shortname[amt] = '\0'; | |
4860 | ||
4861 | hi = (struct elf_link_hash_entry *) | |
66eb6687 | 4862 | bfd_link_hash_lookup (&htab->root, shortname, |
4ad4eba5 AM |
4863 | FALSE, FALSE, FALSE); |
4864 | if (hi != NULL | |
4865 | && hi->root.type == h->root.type | |
4866 | && hi->root.u.def.value == h->root.u.def.value | |
4867 | && hi->root.u.def.section == h->root.u.def.section) | |
4868 | { | |
4869 | (*bed->elf_backend_hide_symbol) (info, hi, TRUE); | |
4870 | hi->root.type = bfd_link_hash_indirect; | |
4871 | hi->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
fcfa13d2 | 4872 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
4ad4eba5 AM |
4873 | sym_hash = elf_sym_hashes (abfd); |
4874 | if (sym_hash) | |
4875 | for (symidx = 0; symidx < extsymcount; ++symidx) | |
4876 | if (sym_hash[symidx] == hi) | |
4877 | { | |
4878 | sym_hash[symidx] = h; | |
4879 | break; | |
4880 | } | |
4881 | } | |
4882 | free (shortname); | |
4883 | } | |
4884 | free (nondeflt_vers); | |
4885 | nondeflt_vers = NULL; | |
4886 | } | |
4887 | ||
4ad4eba5 AM |
4888 | /* Now set the weakdefs field correctly for all the weak defined |
4889 | symbols we found. The only way to do this is to search all the | |
4890 | symbols. Since we only need the information for non functions in | |
4891 | dynamic objects, that's the only time we actually put anything on | |
4892 | the list WEAKS. We need this information so that if a regular | |
4893 | object refers to a symbol defined weakly in a dynamic object, the | |
4894 | real symbol in the dynamic object is also put in the dynamic | |
4895 | symbols; we also must arrange for both symbols to point to the | |
4896 | same memory location. We could handle the general case of symbol | |
4897 | aliasing, but a general symbol alias can only be generated in | |
4898 | assembler code, handling it correctly would be very time | |
4899 | consuming, and other ELF linkers don't handle general aliasing | |
4900 | either. */ | |
4901 | if (weaks != NULL) | |
4902 | { | |
4903 | struct elf_link_hash_entry **hpp; | |
4904 | struct elf_link_hash_entry **hppend; | |
4905 | struct elf_link_hash_entry **sorted_sym_hash; | |
4906 | struct elf_link_hash_entry *h; | |
4907 | size_t sym_count; | |
4908 | ||
4909 | /* Since we have to search the whole symbol list for each weak | |
4910 | defined symbol, search time for N weak defined symbols will be | |
4911 | O(N^2). Binary search will cut it down to O(NlogN). */ | |
4912 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
a50b1753 | 4913 | sorted_sym_hash = (struct elf_link_hash_entry **) bfd_malloc (amt); |
4ad4eba5 AM |
4914 | if (sorted_sym_hash == NULL) |
4915 | goto error_return; | |
4916 | sym_hash = sorted_sym_hash; | |
4917 | hpp = elf_sym_hashes (abfd); | |
4918 | hppend = hpp + extsymcount; | |
4919 | sym_count = 0; | |
4920 | for (; hpp < hppend; hpp++) | |
4921 | { | |
4922 | h = *hpp; | |
4923 | if (h != NULL | |
4924 | && h->root.type == bfd_link_hash_defined | |
fcb93ecf | 4925 | && !bed->is_function_type (h->type)) |
4ad4eba5 AM |
4926 | { |
4927 | *sym_hash = h; | |
4928 | sym_hash++; | |
4929 | sym_count++; | |
4930 | } | |
4931 | } | |
4932 | ||
4933 | qsort (sorted_sym_hash, sym_count, | |
4934 | sizeof (struct elf_link_hash_entry *), | |
4935 | elf_sort_symbol); | |
4936 | ||
4937 | while (weaks != NULL) | |
4938 | { | |
4939 | struct elf_link_hash_entry *hlook; | |
4940 | asection *slook; | |
4941 | bfd_vma vlook; | |
ed54588d | 4942 | size_t i, j, idx = 0; |
4ad4eba5 AM |
4943 | |
4944 | hlook = weaks; | |
f6e332e6 AM |
4945 | weaks = hlook->u.weakdef; |
4946 | hlook->u.weakdef = NULL; | |
4ad4eba5 AM |
4947 | |
4948 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined | |
4949 | || hlook->root.type == bfd_link_hash_defweak | |
4950 | || hlook->root.type == bfd_link_hash_common | |
4951 | || hlook->root.type == bfd_link_hash_indirect); | |
4952 | slook = hlook->root.u.def.section; | |
4953 | vlook = hlook->root.u.def.value; | |
4954 | ||
4ad4eba5 AM |
4955 | i = 0; |
4956 | j = sym_count; | |
14160578 | 4957 | while (i != j) |
4ad4eba5 AM |
4958 | { |
4959 | bfd_signed_vma vdiff; | |
4960 | idx = (i + j) / 2; | |
14160578 | 4961 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
4962 | vdiff = vlook - h->root.u.def.value; |
4963 | if (vdiff < 0) | |
4964 | j = idx; | |
4965 | else if (vdiff > 0) | |
4966 | i = idx + 1; | |
4967 | else | |
4968 | { | |
d3435ae8 | 4969 | int sdiff = slook->id - h->root.u.def.section->id; |
4ad4eba5 AM |
4970 | if (sdiff < 0) |
4971 | j = idx; | |
4972 | else if (sdiff > 0) | |
4973 | i = idx + 1; | |
4974 | else | |
14160578 | 4975 | break; |
4ad4eba5 AM |
4976 | } |
4977 | } | |
4978 | ||
4979 | /* We didn't find a value/section match. */ | |
14160578 | 4980 | if (i == j) |
4ad4eba5 AM |
4981 | continue; |
4982 | ||
14160578 AM |
4983 | /* With multiple aliases, or when the weak symbol is already |
4984 | strongly defined, we have multiple matching symbols and | |
4985 | the binary search above may land on any of them. Step | |
4986 | one past the matching symbol(s). */ | |
4987 | while (++idx != j) | |
4988 | { | |
4989 | h = sorted_sym_hash[idx]; | |
4990 | if (h->root.u.def.section != slook | |
4991 | || h->root.u.def.value != vlook) | |
4992 | break; | |
4993 | } | |
4994 | ||
4995 | /* Now look back over the aliases. Since we sorted by size | |
4996 | as well as value and section, we'll choose the one with | |
4997 | the largest size. */ | |
4998 | while (idx-- != i) | |
4ad4eba5 | 4999 | { |
14160578 | 5000 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
5001 | |
5002 | /* Stop if value or section doesn't match. */ | |
14160578 AM |
5003 | if (h->root.u.def.section != slook |
5004 | || h->root.u.def.value != vlook) | |
4ad4eba5 AM |
5005 | break; |
5006 | else if (h != hlook) | |
5007 | { | |
f6e332e6 | 5008 | hlook->u.weakdef = h; |
4ad4eba5 AM |
5009 | |
5010 | /* If the weak definition is in the list of dynamic | |
5011 | symbols, make sure the real definition is put | |
5012 | there as well. */ | |
5013 | if (hlook->dynindx != -1 && h->dynindx == -1) | |
5014 | { | |
c152c796 | 5015 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4dd07732 AM |
5016 | { |
5017 | err_free_sym_hash: | |
5018 | free (sorted_sym_hash); | |
5019 | goto error_return; | |
5020 | } | |
4ad4eba5 AM |
5021 | } |
5022 | ||
5023 | /* If the real definition is in the list of dynamic | |
5024 | symbols, make sure the weak definition is put | |
5025 | there as well. If we don't do this, then the | |
5026 | dynamic loader might not merge the entries for the | |
5027 | real definition and the weak definition. */ | |
5028 | if (h->dynindx != -1 && hlook->dynindx == -1) | |
5029 | { | |
c152c796 | 5030 | if (! bfd_elf_link_record_dynamic_symbol (info, hlook)) |
4dd07732 | 5031 | goto err_free_sym_hash; |
4ad4eba5 AM |
5032 | } |
5033 | break; | |
5034 | } | |
5035 | } | |
5036 | } | |
5037 | ||
5038 | free (sorted_sym_hash); | |
5039 | } | |
5040 | ||
33177bb1 AM |
5041 | if (bed->check_directives |
5042 | && !(*bed->check_directives) (abfd, info)) | |
5043 | return FALSE; | |
85fbca6a | 5044 | |
d9689752 L |
5045 | if (!info->check_relocs_after_open_input |
5046 | && !_bfd_elf_link_check_relocs (abfd, info)) | |
5047 | return FALSE; | |
4ad4eba5 AM |
5048 | |
5049 | /* If this is a non-traditional link, try to optimize the handling | |
5050 | of the .stab/.stabstr sections. */ | |
5051 | if (! dynamic | |
5052 | && ! info->traditional_format | |
66eb6687 | 5053 | && is_elf_hash_table (htab) |
4ad4eba5 AM |
5054 | && (info->strip != strip_all && info->strip != strip_debugger)) |
5055 | { | |
5056 | asection *stabstr; | |
5057 | ||
5058 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
5059 | if (stabstr != NULL) | |
5060 | { | |
5061 | bfd_size_type string_offset = 0; | |
5062 | asection *stab; | |
5063 | ||
5064 | for (stab = abfd->sections; stab; stab = stab->next) | |
0112cd26 | 5065 | if (CONST_STRNEQ (stab->name, ".stab") |
4ad4eba5 AM |
5066 | && (!stab->name[5] || |
5067 | (stab->name[5] == '.' && ISDIGIT (stab->name[6]))) | |
5068 | && (stab->flags & SEC_MERGE) == 0 | |
5069 | && !bfd_is_abs_section (stab->output_section)) | |
5070 | { | |
5071 | struct bfd_elf_section_data *secdata; | |
5072 | ||
5073 | secdata = elf_section_data (stab); | |
66eb6687 AM |
5074 | if (! _bfd_link_section_stabs (abfd, &htab->stab_info, stab, |
5075 | stabstr, &secdata->sec_info, | |
4ad4eba5 AM |
5076 | &string_offset)) |
5077 | goto error_return; | |
5078 | if (secdata->sec_info) | |
dbaa2011 | 5079 | stab->sec_info_type = SEC_INFO_TYPE_STABS; |
4ad4eba5 AM |
5080 | } |
5081 | } | |
5082 | } | |
5083 | ||
66eb6687 | 5084 | if (is_elf_hash_table (htab) && add_needed) |
4ad4eba5 AM |
5085 | { |
5086 | /* Add this bfd to the loaded list. */ | |
5087 | struct elf_link_loaded_list *n; | |
5088 | ||
ca4be51c | 5089 | n = (struct elf_link_loaded_list *) bfd_alloc (abfd, sizeof (*n)); |
4ad4eba5 AM |
5090 | if (n == NULL) |
5091 | goto error_return; | |
5092 | n->abfd = abfd; | |
66eb6687 AM |
5093 | n->next = htab->loaded; |
5094 | htab->loaded = n; | |
4ad4eba5 AM |
5095 | } |
5096 | ||
5097 | return TRUE; | |
5098 | ||
5099 | error_free_vers: | |
66eb6687 AM |
5100 | if (old_tab != NULL) |
5101 | free (old_tab); | |
4ad4eba5 AM |
5102 | if (nondeflt_vers != NULL) |
5103 | free (nondeflt_vers); | |
5104 | if (extversym != NULL) | |
5105 | free (extversym); | |
5106 | error_free_sym: | |
5107 | if (isymbuf != NULL) | |
5108 | free (isymbuf); | |
5109 | error_return: | |
5110 | return FALSE; | |
5111 | } | |
5112 | ||
8387904d AM |
5113 | /* Return the linker hash table entry of a symbol that might be |
5114 | satisfied by an archive symbol. Return -1 on error. */ | |
5115 | ||
5116 | struct elf_link_hash_entry * | |
5117 | _bfd_elf_archive_symbol_lookup (bfd *abfd, | |
5118 | struct bfd_link_info *info, | |
5119 | const char *name) | |
5120 | { | |
5121 | struct elf_link_hash_entry *h; | |
5122 | char *p, *copy; | |
5123 | size_t len, first; | |
5124 | ||
2a41f396 | 5125 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, TRUE); |
8387904d AM |
5126 | if (h != NULL) |
5127 | return h; | |
5128 | ||
5129 | /* If this is a default version (the name contains @@), look up the | |
5130 | symbol again with only one `@' as well as without the version. | |
5131 | The effect is that references to the symbol with and without the | |
5132 | version will be matched by the default symbol in the archive. */ | |
5133 | ||
5134 | p = strchr (name, ELF_VER_CHR); | |
5135 | if (p == NULL || p[1] != ELF_VER_CHR) | |
5136 | return h; | |
5137 | ||
5138 | /* First check with only one `@'. */ | |
5139 | len = strlen (name); | |
a50b1753 | 5140 | copy = (char *) bfd_alloc (abfd, len); |
8387904d AM |
5141 | if (copy == NULL) |
5142 | return (struct elf_link_hash_entry *) 0 - 1; | |
5143 | ||
5144 | first = p - name + 1; | |
5145 | memcpy (copy, name, first); | |
5146 | memcpy (copy + first, name + first + 1, len - first); | |
5147 | ||
2a41f396 | 5148 | h = elf_link_hash_lookup (elf_hash_table (info), copy, FALSE, FALSE, TRUE); |
8387904d AM |
5149 | if (h == NULL) |
5150 | { | |
5151 | /* We also need to check references to the symbol without the | |
5152 | version. */ | |
5153 | copy[first - 1] = '\0'; | |
5154 | h = elf_link_hash_lookup (elf_hash_table (info), copy, | |
2a41f396 | 5155 | FALSE, FALSE, TRUE); |
8387904d AM |
5156 | } |
5157 | ||
5158 | bfd_release (abfd, copy); | |
5159 | return h; | |
5160 | } | |
5161 | ||
0ad989f9 | 5162 | /* Add symbols from an ELF archive file to the linker hash table. We |
13e570f8 AM |
5163 | don't use _bfd_generic_link_add_archive_symbols because we need to |
5164 | handle versioned symbols. | |
0ad989f9 L |
5165 | |
5166 | Fortunately, ELF archive handling is simpler than that done by | |
5167 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
5168 | oddities. In ELF, if we find a symbol in the archive map, and the | |
5169 | symbol is currently undefined, we know that we must pull in that | |
5170 | object file. | |
5171 | ||
5172 | Unfortunately, we do have to make multiple passes over the symbol | |
5173 | table until nothing further is resolved. */ | |
5174 | ||
4ad4eba5 AM |
5175 | static bfd_boolean |
5176 | elf_link_add_archive_symbols (bfd *abfd, struct bfd_link_info *info) | |
0ad989f9 L |
5177 | { |
5178 | symindex c; | |
13e570f8 | 5179 | unsigned char *included = NULL; |
0ad989f9 L |
5180 | carsym *symdefs; |
5181 | bfd_boolean loop; | |
5182 | bfd_size_type amt; | |
8387904d AM |
5183 | const struct elf_backend_data *bed; |
5184 | struct elf_link_hash_entry * (*archive_symbol_lookup) | |
5185 | (bfd *, struct bfd_link_info *, const char *); | |
0ad989f9 L |
5186 | |
5187 | if (! bfd_has_map (abfd)) | |
5188 | { | |
5189 | /* An empty archive is a special case. */ | |
5190 | if (bfd_openr_next_archived_file (abfd, NULL) == NULL) | |
5191 | return TRUE; | |
5192 | bfd_set_error (bfd_error_no_armap); | |
5193 | return FALSE; | |
5194 | } | |
5195 | ||
5196 | /* Keep track of all symbols we know to be already defined, and all | |
5197 | files we know to be already included. This is to speed up the | |
5198 | second and subsequent passes. */ | |
5199 | c = bfd_ardata (abfd)->symdef_count; | |
5200 | if (c == 0) | |
5201 | return TRUE; | |
5202 | amt = c; | |
13e570f8 AM |
5203 | amt *= sizeof (*included); |
5204 | included = (unsigned char *) bfd_zmalloc (amt); | |
5205 | if (included == NULL) | |
5206 | return FALSE; | |
0ad989f9 L |
5207 | |
5208 | symdefs = bfd_ardata (abfd)->symdefs; | |
8387904d AM |
5209 | bed = get_elf_backend_data (abfd); |
5210 | archive_symbol_lookup = bed->elf_backend_archive_symbol_lookup; | |
0ad989f9 L |
5211 | |
5212 | do | |
5213 | { | |
5214 | file_ptr last; | |
5215 | symindex i; | |
5216 | carsym *symdef; | |
5217 | carsym *symdefend; | |
5218 | ||
5219 | loop = FALSE; | |
5220 | last = -1; | |
5221 | ||
5222 | symdef = symdefs; | |
5223 | symdefend = symdef + c; | |
5224 | for (i = 0; symdef < symdefend; symdef++, i++) | |
5225 | { | |
5226 | struct elf_link_hash_entry *h; | |
5227 | bfd *element; | |
5228 | struct bfd_link_hash_entry *undefs_tail; | |
5229 | symindex mark; | |
5230 | ||
13e570f8 | 5231 | if (included[i]) |
0ad989f9 L |
5232 | continue; |
5233 | if (symdef->file_offset == last) | |
5234 | { | |
5235 | included[i] = TRUE; | |
5236 | continue; | |
5237 | } | |
5238 | ||
8387904d AM |
5239 | h = archive_symbol_lookup (abfd, info, symdef->name); |
5240 | if (h == (struct elf_link_hash_entry *) 0 - 1) | |
5241 | goto error_return; | |
0ad989f9 L |
5242 | |
5243 | if (h == NULL) | |
5244 | continue; | |
5245 | ||
5246 | if (h->root.type == bfd_link_hash_common) | |
5247 | { | |
5248 | /* We currently have a common symbol. The archive map contains | |
5249 | a reference to this symbol, so we may want to include it. We | |
5250 | only want to include it however, if this archive element | |
5251 | contains a definition of the symbol, not just another common | |
5252 | declaration of it. | |
5253 | ||
5254 | Unfortunately some archivers (including GNU ar) will put | |
5255 | declarations of common symbols into their archive maps, as | |
5256 | well as real definitions, so we cannot just go by the archive | |
5257 | map alone. Instead we must read in the element's symbol | |
5258 | table and check that to see what kind of symbol definition | |
5259 | this is. */ | |
5260 | if (! elf_link_is_defined_archive_symbol (abfd, symdef)) | |
5261 | continue; | |
5262 | } | |
5263 | else if (h->root.type != bfd_link_hash_undefined) | |
5264 | { | |
5265 | if (h->root.type != bfd_link_hash_undefweak) | |
13e570f8 AM |
5266 | /* Symbol must be defined. Don't check it again. */ |
5267 | included[i] = TRUE; | |
0ad989f9 L |
5268 | continue; |
5269 | } | |
5270 | ||
5271 | /* We need to include this archive member. */ | |
5272 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
5273 | if (element == NULL) | |
5274 | goto error_return; | |
5275 | ||
5276 | if (! bfd_check_format (element, bfd_object)) | |
5277 | goto error_return; | |
5278 | ||
0ad989f9 L |
5279 | undefs_tail = info->hash->undefs_tail; |
5280 | ||
0e144ba7 AM |
5281 | if (!(*info->callbacks |
5282 | ->add_archive_element) (info, element, symdef->name, &element)) | |
b95a0a31 | 5283 | continue; |
0e144ba7 | 5284 | if (!bfd_link_add_symbols (element, info)) |
0ad989f9 L |
5285 | goto error_return; |
5286 | ||
5287 | /* If there are any new undefined symbols, we need to make | |
5288 | another pass through the archive in order to see whether | |
5289 | they can be defined. FIXME: This isn't perfect, because | |
5290 | common symbols wind up on undefs_tail and because an | |
5291 | undefined symbol which is defined later on in this pass | |
5292 | does not require another pass. This isn't a bug, but it | |
5293 | does make the code less efficient than it could be. */ | |
5294 | if (undefs_tail != info->hash->undefs_tail) | |
5295 | loop = TRUE; | |
5296 | ||
5297 | /* Look backward to mark all symbols from this object file | |
5298 | which we have already seen in this pass. */ | |
5299 | mark = i; | |
5300 | do | |
5301 | { | |
5302 | included[mark] = TRUE; | |
5303 | if (mark == 0) | |
5304 | break; | |
5305 | --mark; | |
5306 | } | |
5307 | while (symdefs[mark].file_offset == symdef->file_offset); | |
5308 | ||
5309 | /* We mark subsequent symbols from this object file as we go | |
5310 | on through the loop. */ | |
5311 | last = symdef->file_offset; | |
5312 | } | |
5313 | } | |
5314 | while (loop); | |
5315 | ||
0ad989f9 L |
5316 | free (included); |
5317 | ||
5318 | return TRUE; | |
5319 | ||
5320 | error_return: | |
0ad989f9 L |
5321 | if (included != NULL) |
5322 | free (included); | |
5323 | return FALSE; | |
5324 | } | |
4ad4eba5 AM |
5325 | |
5326 | /* Given an ELF BFD, add symbols to the global hash table as | |
5327 | appropriate. */ | |
5328 | ||
5329 | bfd_boolean | |
5330 | bfd_elf_link_add_symbols (bfd *abfd, struct bfd_link_info *info) | |
5331 | { | |
5332 | switch (bfd_get_format (abfd)) | |
5333 | { | |
5334 | case bfd_object: | |
5335 | return elf_link_add_object_symbols (abfd, info); | |
5336 | case bfd_archive: | |
5337 | return elf_link_add_archive_symbols (abfd, info); | |
5338 | default: | |
5339 | bfd_set_error (bfd_error_wrong_format); | |
5340 | return FALSE; | |
5341 | } | |
5342 | } | |
5a580b3a | 5343 | \f |
14b1c01e AM |
5344 | struct hash_codes_info |
5345 | { | |
5346 | unsigned long *hashcodes; | |
5347 | bfd_boolean error; | |
5348 | }; | |
a0c8462f | 5349 | |
5a580b3a AM |
5350 | /* This function will be called though elf_link_hash_traverse to store |
5351 | all hash value of the exported symbols in an array. */ | |
5352 | ||
5353 | static bfd_boolean | |
5354 | elf_collect_hash_codes (struct elf_link_hash_entry *h, void *data) | |
5355 | { | |
a50b1753 | 5356 | struct hash_codes_info *inf = (struct hash_codes_info *) data; |
5a580b3a | 5357 | const char *name; |
5a580b3a AM |
5358 | unsigned long ha; |
5359 | char *alc = NULL; | |
5360 | ||
5a580b3a AM |
5361 | /* Ignore indirect symbols. These are added by the versioning code. */ |
5362 | if (h->dynindx == -1) | |
5363 | return TRUE; | |
5364 | ||
5365 | name = h->root.root.string; | |
422f1182 | 5366 | if (h->versioned >= versioned) |
5a580b3a | 5367 | { |
422f1182 L |
5368 | char *p = strchr (name, ELF_VER_CHR); |
5369 | if (p != NULL) | |
14b1c01e | 5370 | { |
422f1182 L |
5371 | alc = (char *) bfd_malloc (p - name + 1); |
5372 | if (alc == NULL) | |
5373 | { | |
5374 | inf->error = TRUE; | |
5375 | return FALSE; | |
5376 | } | |
5377 | memcpy (alc, name, p - name); | |
5378 | alc[p - name] = '\0'; | |
5379 | name = alc; | |
14b1c01e | 5380 | } |
5a580b3a AM |
5381 | } |
5382 | ||
5383 | /* Compute the hash value. */ | |
5384 | ha = bfd_elf_hash (name); | |
5385 | ||
5386 | /* Store the found hash value in the array given as the argument. */ | |
14b1c01e | 5387 | *(inf->hashcodes)++ = ha; |
5a580b3a AM |
5388 | |
5389 | /* And store it in the struct so that we can put it in the hash table | |
5390 | later. */ | |
f6e332e6 | 5391 | h->u.elf_hash_value = ha; |
5a580b3a AM |
5392 | |
5393 | if (alc != NULL) | |
5394 | free (alc); | |
5395 | ||
5396 | return TRUE; | |
5397 | } | |
5398 | ||
fdc90cb4 JJ |
5399 | struct collect_gnu_hash_codes |
5400 | { | |
5401 | bfd *output_bfd; | |
5402 | const struct elf_backend_data *bed; | |
5403 | unsigned long int nsyms; | |
5404 | unsigned long int maskbits; | |
5405 | unsigned long int *hashcodes; | |
5406 | unsigned long int *hashval; | |
5407 | unsigned long int *indx; | |
5408 | unsigned long int *counts; | |
5409 | bfd_vma *bitmask; | |
5410 | bfd_byte *contents; | |
5411 | long int min_dynindx; | |
5412 | unsigned long int bucketcount; | |
5413 | unsigned long int symindx; | |
5414 | long int local_indx; | |
5415 | long int shift1, shift2; | |
5416 | unsigned long int mask; | |
14b1c01e | 5417 | bfd_boolean error; |
fdc90cb4 JJ |
5418 | }; |
5419 | ||
5420 | /* This function will be called though elf_link_hash_traverse to store | |
5421 | all hash value of the exported symbols in an array. */ | |
5422 | ||
5423 | static bfd_boolean | |
5424 | elf_collect_gnu_hash_codes (struct elf_link_hash_entry *h, void *data) | |
5425 | { | |
a50b1753 | 5426 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 | 5427 | const char *name; |
fdc90cb4 JJ |
5428 | unsigned long ha; |
5429 | char *alc = NULL; | |
5430 | ||
fdc90cb4 JJ |
5431 | /* Ignore indirect symbols. These are added by the versioning code. */ |
5432 | if (h->dynindx == -1) | |
5433 | return TRUE; | |
5434 | ||
5435 | /* Ignore also local symbols and undefined symbols. */ | |
5436 | if (! (*s->bed->elf_hash_symbol) (h)) | |
5437 | return TRUE; | |
5438 | ||
5439 | name = h->root.root.string; | |
422f1182 | 5440 | if (h->versioned >= versioned) |
fdc90cb4 | 5441 | { |
422f1182 L |
5442 | char *p = strchr (name, ELF_VER_CHR); |
5443 | if (p != NULL) | |
14b1c01e | 5444 | { |
422f1182 L |
5445 | alc = (char *) bfd_malloc (p - name + 1); |
5446 | if (alc == NULL) | |
5447 | { | |
5448 | s->error = TRUE; | |
5449 | return FALSE; | |
5450 | } | |
5451 | memcpy (alc, name, p - name); | |
5452 | alc[p - name] = '\0'; | |
5453 | name = alc; | |
14b1c01e | 5454 | } |
fdc90cb4 JJ |
5455 | } |
5456 | ||
5457 | /* Compute the hash value. */ | |
5458 | ha = bfd_elf_gnu_hash (name); | |
5459 | ||
5460 | /* Store the found hash value in the array for compute_bucket_count, | |
5461 | and also for .dynsym reordering purposes. */ | |
5462 | s->hashcodes[s->nsyms] = ha; | |
5463 | s->hashval[h->dynindx] = ha; | |
5464 | ++s->nsyms; | |
5465 | if (s->min_dynindx < 0 || s->min_dynindx > h->dynindx) | |
5466 | s->min_dynindx = h->dynindx; | |
5467 | ||
5468 | if (alc != NULL) | |
5469 | free (alc); | |
5470 | ||
5471 | return TRUE; | |
5472 | } | |
5473 | ||
5474 | /* This function will be called though elf_link_hash_traverse to do | |
5475 | final dynaminc symbol renumbering. */ | |
5476 | ||
5477 | static bfd_boolean | |
5478 | elf_renumber_gnu_hash_syms (struct elf_link_hash_entry *h, void *data) | |
5479 | { | |
a50b1753 | 5480 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 JJ |
5481 | unsigned long int bucket; |
5482 | unsigned long int val; | |
5483 | ||
fdc90cb4 JJ |
5484 | /* Ignore indirect symbols. */ |
5485 | if (h->dynindx == -1) | |
5486 | return TRUE; | |
5487 | ||
5488 | /* Ignore also local symbols and undefined symbols. */ | |
5489 | if (! (*s->bed->elf_hash_symbol) (h)) | |
5490 | { | |
5491 | if (h->dynindx >= s->min_dynindx) | |
5492 | h->dynindx = s->local_indx++; | |
5493 | return TRUE; | |
5494 | } | |
5495 | ||
5496 | bucket = s->hashval[h->dynindx] % s->bucketcount; | |
5497 | val = (s->hashval[h->dynindx] >> s->shift1) | |
5498 | & ((s->maskbits >> s->shift1) - 1); | |
5499 | s->bitmask[val] |= ((bfd_vma) 1) << (s->hashval[h->dynindx] & s->mask); | |
5500 | s->bitmask[val] | |
5501 | |= ((bfd_vma) 1) << ((s->hashval[h->dynindx] >> s->shift2) & s->mask); | |
5502 | val = s->hashval[h->dynindx] & ~(unsigned long int) 1; | |
5503 | if (s->counts[bucket] == 1) | |
5504 | /* Last element terminates the chain. */ | |
5505 | val |= 1; | |
5506 | bfd_put_32 (s->output_bfd, val, | |
5507 | s->contents + (s->indx[bucket] - s->symindx) * 4); | |
5508 | --s->counts[bucket]; | |
5509 | h->dynindx = s->indx[bucket]++; | |
5510 | return TRUE; | |
5511 | } | |
5512 | ||
5513 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ | |
5514 | ||
5515 | bfd_boolean | |
5516 | _bfd_elf_hash_symbol (struct elf_link_hash_entry *h) | |
5517 | { | |
5518 | return !(h->forced_local | |
5519 | || h->root.type == bfd_link_hash_undefined | |
5520 | || h->root.type == bfd_link_hash_undefweak | |
5521 | || ((h->root.type == bfd_link_hash_defined | |
5522 | || h->root.type == bfd_link_hash_defweak) | |
5523 | && h->root.u.def.section->output_section == NULL)); | |
5524 | } | |
5525 | ||
5a580b3a AM |
5526 | /* Array used to determine the number of hash table buckets to use |
5527 | based on the number of symbols there are. If there are fewer than | |
5528 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
5529 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
5530 | than 32771 buckets. */ | |
5531 | ||
5532 | static const size_t elf_buckets[] = | |
5533 | { | |
5534 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, | |
5535 | 16411, 32771, 0 | |
5536 | }; | |
5537 | ||
5538 | /* Compute bucket count for hashing table. We do not use a static set | |
5539 | of possible tables sizes anymore. Instead we determine for all | |
5540 | possible reasonable sizes of the table the outcome (i.e., the | |
5541 | number of collisions etc) and choose the best solution. The | |
5542 | weighting functions are not too simple to allow the table to grow | |
5543 | without bounds. Instead one of the weighting factors is the size. | |
5544 | Therefore the result is always a good payoff between few collisions | |
5545 | (= short chain lengths) and table size. */ | |
5546 | static size_t | |
b20dd2ce | 5547 | compute_bucket_count (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
d40f3da9 AM |
5548 | unsigned long int *hashcodes ATTRIBUTE_UNUSED, |
5549 | unsigned long int nsyms, | |
5550 | int gnu_hash) | |
5a580b3a | 5551 | { |
5a580b3a | 5552 | size_t best_size = 0; |
5a580b3a | 5553 | unsigned long int i; |
5a580b3a | 5554 | |
5a580b3a AM |
5555 | /* We have a problem here. The following code to optimize the table |
5556 | size requires an integer type with more the 32 bits. If | |
5557 | BFD_HOST_U_64_BIT is set we know about such a type. */ | |
5558 | #ifdef BFD_HOST_U_64_BIT | |
5559 | if (info->optimize) | |
5560 | { | |
5a580b3a AM |
5561 | size_t minsize; |
5562 | size_t maxsize; | |
5563 | BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0); | |
5a580b3a | 5564 | bfd *dynobj = elf_hash_table (info)->dynobj; |
d40f3da9 | 5565 | size_t dynsymcount = elf_hash_table (info)->dynsymcount; |
5a580b3a | 5566 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); |
fdc90cb4 | 5567 | unsigned long int *counts; |
d40f3da9 | 5568 | bfd_size_type amt; |
0883b6e0 | 5569 | unsigned int no_improvement_count = 0; |
5a580b3a AM |
5570 | |
5571 | /* Possible optimization parameters: if we have NSYMS symbols we say | |
5572 | that the hashing table must at least have NSYMS/4 and at most | |
5573 | 2*NSYMS buckets. */ | |
5574 | minsize = nsyms / 4; | |
5575 | if (minsize == 0) | |
5576 | minsize = 1; | |
5577 | best_size = maxsize = nsyms * 2; | |
fdc90cb4 JJ |
5578 | if (gnu_hash) |
5579 | { | |
5580 | if (minsize < 2) | |
5581 | minsize = 2; | |
5582 | if ((best_size & 31) == 0) | |
5583 | ++best_size; | |
5584 | } | |
5a580b3a AM |
5585 | |
5586 | /* Create array where we count the collisions in. We must use bfd_malloc | |
5587 | since the size could be large. */ | |
5588 | amt = maxsize; | |
5589 | amt *= sizeof (unsigned long int); | |
a50b1753 | 5590 | counts = (unsigned long int *) bfd_malloc (amt); |
5a580b3a | 5591 | if (counts == NULL) |
fdc90cb4 | 5592 | return 0; |
5a580b3a AM |
5593 | |
5594 | /* Compute the "optimal" size for the hash table. The criteria is a | |
5595 | minimal chain length. The minor criteria is (of course) the size | |
5596 | of the table. */ | |
5597 | for (i = minsize; i < maxsize; ++i) | |
5598 | { | |
5599 | /* Walk through the array of hashcodes and count the collisions. */ | |
5600 | BFD_HOST_U_64_BIT max; | |
5601 | unsigned long int j; | |
5602 | unsigned long int fact; | |
5603 | ||
fdc90cb4 JJ |
5604 | if (gnu_hash && (i & 31) == 0) |
5605 | continue; | |
5606 | ||
5a580b3a AM |
5607 | memset (counts, '\0', i * sizeof (unsigned long int)); |
5608 | ||
5609 | /* Determine how often each hash bucket is used. */ | |
5610 | for (j = 0; j < nsyms; ++j) | |
5611 | ++counts[hashcodes[j] % i]; | |
5612 | ||
5613 | /* For the weight function we need some information about the | |
5614 | pagesize on the target. This is information need not be 100% | |
5615 | accurate. Since this information is not available (so far) we | |
5616 | define it here to a reasonable default value. If it is crucial | |
5617 | to have a better value some day simply define this value. */ | |
5618 | # ifndef BFD_TARGET_PAGESIZE | |
5619 | # define BFD_TARGET_PAGESIZE (4096) | |
5620 | # endif | |
5621 | ||
fdc90cb4 JJ |
5622 | /* We in any case need 2 + DYNSYMCOUNT entries for the size values |
5623 | and the chains. */ | |
5624 | max = (2 + dynsymcount) * bed->s->sizeof_hash_entry; | |
5a580b3a AM |
5625 | |
5626 | # if 1 | |
5627 | /* Variant 1: optimize for short chains. We add the squares | |
5628 | of all the chain lengths (which favors many small chain | |
5629 | over a few long chains). */ | |
5630 | for (j = 0; j < i; ++j) | |
5631 | max += counts[j] * counts[j]; | |
5632 | ||
5633 | /* This adds penalties for the overall size of the table. */ | |
fdc90cb4 | 5634 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
5635 | max *= fact * fact; |
5636 | # else | |
5637 | /* Variant 2: Optimize a lot more for small table. Here we | |
5638 | also add squares of the size but we also add penalties for | |
5639 | empty slots (the +1 term). */ | |
5640 | for (j = 0; j < i; ++j) | |
5641 | max += (1 + counts[j]) * (1 + counts[j]); | |
5642 | ||
5643 | /* The overall size of the table is considered, but not as | |
5644 | strong as in variant 1, where it is squared. */ | |
fdc90cb4 | 5645 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
5646 | max *= fact; |
5647 | # endif | |
5648 | ||
5649 | /* Compare with current best results. */ | |
5650 | if (max < best_chlen) | |
5651 | { | |
5652 | best_chlen = max; | |
5653 | best_size = i; | |
ca4be51c | 5654 | no_improvement_count = 0; |
5a580b3a | 5655 | } |
0883b6e0 NC |
5656 | /* PR 11843: Avoid futile long searches for the best bucket size |
5657 | when there are a large number of symbols. */ | |
5658 | else if (++no_improvement_count == 100) | |
5659 | break; | |
5a580b3a AM |
5660 | } |
5661 | ||
5662 | free (counts); | |
5663 | } | |
5664 | else | |
5665 | #endif /* defined (BFD_HOST_U_64_BIT) */ | |
5666 | { | |
5667 | /* This is the fallback solution if no 64bit type is available or if we | |
5668 | are not supposed to spend much time on optimizations. We select the | |
5669 | bucket count using a fixed set of numbers. */ | |
5670 | for (i = 0; elf_buckets[i] != 0; i++) | |
5671 | { | |
5672 | best_size = elf_buckets[i]; | |
fdc90cb4 | 5673 | if (nsyms < elf_buckets[i + 1]) |
5a580b3a AM |
5674 | break; |
5675 | } | |
fdc90cb4 JJ |
5676 | if (gnu_hash && best_size < 2) |
5677 | best_size = 2; | |
5a580b3a AM |
5678 | } |
5679 | ||
5a580b3a AM |
5680 | return best_size; |
5681 | } | |
5682 | ||
d0bf826b AM |
5683 | /* Size any SHT_GROUP section for ld -r. */ |
5684 | ||
5685 | bfd_boolean | |
5686 | _bfd_elf_size_group_sections (struct bfd_link_info *info) | |
5687 | { | |
5688 | bfd *ibfd; | |
5689 | ||
c72f2fb2 | 5690 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
d0bf826b AM |
5691 | if (bfd_get_flavour (ibfd) == bfd_target_elf_flavour |
5692 | && !_bfd_elf_fixup_group_sections (ibfd, bfd_abs_section_ptr)) | |
5693 | return FALSE; | |
5694 | return TRUE; | |
5695 | } | |
5696 | ||
04c3a755 NS |
5697 | /* Set a default stack segment size. The value in INFO wins. If it |
5698 | is unset, LEGACY_SYMBOL's value is used, and if that symbol is | |
5699 | undefined it is initialized. */ | |
5700 | ||
5701 | bfd_boolean | |
5702 | bfd_elf_stack_segment_size (bfd *output_bfd, | |
5703 | struct bfd_link_info *info, | |
5704 | const char *legacy_symbol, | |
5705 | bfd_vma default_size) | |
5706 | { | |
5707 | struct elf_link_hash_entry *h = NULL; | |
5708 | ||
5709 | /* Look for legacy symbol. */ | |
5710 | if (legacy_symbol) | |
5711 | h = elf_link_hash_lookup (elf_hash_table (info), legacy_symbol, | |
5712 | FALSE, FALSE, FALSE); | |
5713 | if (h && (h->root.type == bfd_link_hash_defined | |
5714 | || h->root.type == bfd_link_hash_defweak) | |
5715 | && h->def_regular | |
5716 | && (h->type == STT_NOTYPE || h->type == STT_OBJECT)) | |
5717 | { | |
5718 | /* The symbol has no type if specified on the command line. */ | |
5719 | h->type = STT_OBJECT; | |
5720 | if (info->stacksize) | |
5721 | (*_bfd_error_handler) (_("%B: stack size specified and %s set"), | |
5722 | output_bfd, legacy_symbol); | |
5723 | else if (h->root.u.def.section != bfd_abs_section_ptr) | |
5724 | (*_bfd_error_handler) (_("%B: %s not absolute"), | |
5725 | output_bfd, legacy_symbol); | |
5726 | else | |
5727 | info->stacksize = h->root.u.def.value; | |
5728 | } | |
5729 | ||
5730 | if (!info->stacksize) | |
5731 | /* If the user didn't set a size, or explicitly inhibit the | |
5732 | size, set it now. */ | |
5733 | info->stacksize = default_size; | |
5734 | ||
5735 | /* Provide the legacy symbol, if it is referenced. */ | |
5736 | if (h && (h->root.type == bfd_link_hash_undefined | |
5737 | || h->root.type == bfd_link_hash_undefweak)) | |
5738 | { | |
5739 | struct bfd_link_hash_entry *bh = NULL; | |
5740 | ||
5741 | if (!(_bfd_generic_link_add_one_symbol | |
5742 | (info, output_bfd, legacy_symbol, | |
5743 | BSF_GLOBAL, bfd_abs_section_ptr, | |
5744 | info->stacksize >= 0 ? info->stacksize : 0, | |
5745 | NULL, FALSE, get_elf_backend_data (output_bfd)->collect, &bh))) | |
5746 | return FALSE; | |
5747 | ||
5748 | h = (struct elf_link_hash_entry *) bh; | |
5749 | h->def_regular = 1; | |
5750 | h->type = STT_OBJECT; | |
5751 | } | |
5752 | ||
5753 | return TRUE; | |
5754 | } | |
5755 | ||
5a580b3a AM |
5756 | /* Set up the sizes and contents of the ELF dynamic sections. This is |
5757 | called by the ELF linker emulation before_allocation routine. We | |
5758 | must set the sizes of the sections before the linker sets the | |
5759 | addresses of the various sections. */ | |
5760 | ||
5761 | bfd_boolean | |
5762 | bfd_elf_size_dynamic_sections (bfd *output_bfd, | |
5763 | const char *soname, | |
5764 | const char *rpath, | |
5765 | const char *filter_shlib, | |
7ee314fa AM |
5766 | const char *audit, |
5767 | const char *depaudit, | |
5a580b3a AM |
5768 | const char * const *auxiliary_filters, |
5769 | struct bfd_link_info *info, | |
fd91d419 | 5770 | asection **sinterpptr) |
5a580b3a AM |
5771 | { |
5772 | bfd_size_type soname_indx; | |
5773 | bfd *dynobj; | |
5774 | const struct elf_backend_data *bed; | |
28caa186 | 5775 | struct elf_info_failed asvinfo; |
5a580b3a AM |
5776 | |
5777 | *sinterpptr = NULL; | |
5778 | ||
5779 | soname_indx = (bfd_size_type) -1; | |
5780 | ||
5781 | if (!is_elf_hash_table (info->hash)) | |
5782 | return TRUE; | |
5783 | ||
6bfdb61b | 5784 | bed = get_elf_backend_data (output_bfd); |
04c3a755 NS |
5785 | |
5786 | /* Any syms created from now on start with -1 in | |
5787 | got.refcount/offset and plt.refcount/offset. */ | |
5788 | elf_hash_table (info)->init_got_refcount | |
5789 | = elf_hash_table (info)->init_got_offset; | |
5790 | elf_hash_table (info)->init_plt_refcount | |
5791 | = elf_hash_table (info)->init_plt_offset; | |
5792 | ||
0e1862bb | 5793 | if (bfd_link_relocatable (info) |
04c3a755 NS |
5794 | && !_bfd_elf_size_group_sections (info)) |
5795 | return FALSE; | |
5796 | ||
5797 | /* The backend may have to create some sections regardless of whether | |
5798 | we're dynamic or not. */ | |
5799 | if (bed->elf_backend_always_size_sections | |
5800 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
5801 | return FALSE; | |
5802 | ||
5803 | /* Determine any GNU_STACK segment requirements, after the backend | |
5804 | has had a chance to set a default segment size. */ | |
5a580b3a | 5805 | if (info->execstack) |
12bd6957 | 5806 | elf_stack_flags (output_bfd) = PF_R | PF_W | PF_X; |
5a580b3a | 5807 | else if (info->noexecstack) |
12bd6957 | 5808 | elf_stack_flags (output_bfd) = PF_R | PF_W; |
5a580b3a AM |
5809 | else |
5810 | { | |
5811 | bfd *inputobj; | |
5812 | asection *notesec = NULL; | |
5813 | int exec = 0; | |
5814 | ||
5815 | for (inputobj = info->input_bfds; | |
5816 | inputobj; | |
c72f2fb2 | 5817 | inputobj = inputobj->link.next) |
5a580b3a AM |
5818 | { |
5819 | asection *s; | |
5820 | ||
a92c088a L |
5821 | if (inputobj->flags |
5822 | & (DYNAMIC | EXEC_P | BFD_PLUGIN | BFD_LINKER_CREATED)) | |
5a580b3a AM |
5823 | continue; |
5824 | s = bfd_get_section_by_name (inputobj, ".note.GNU-stack"); | |
5825 | if (s) | |
5826 | { | |
5827 | if (s->flags & SEC_CODE) | |
5828 | exec = PF_X; | |
5829 | notesec = s; | |
5830 | } | |
6bfdb61b | 5831 | else if (bed->default_execstack) |
5a580b3a AM |
5832 | exec = PF_X; |
5833 | } | |
04c3a755 | 5834 | if (notesec || info->stacksize > 0) |
12bd6957 | 5835 | elf_stack_flags (output_bfd) = PF_R | PF_W | exec; |
0e1862bb | 5836 | if (notesec && exec && bfd_link_relocatable (info) |
04c3a755 NS |
5837 | && notesec->output_section != bfd_abs_section_ptr) |
5838 | notesec->output_section->flags |= SEC_CODE; | |
5a580b3a AM |
5839 | } |
5840 | ||
5a580b3a AM |
5841 | dynobj = elf_hash_table (info)->dynobj; |
5842 | ||
9a2a56cc | 5843 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) |
5a580b3a AM |
5844 | { |
5845 | struct elf_info_failed eif; | |
5846 | struct elf_link_hash_entry *h; | |
5847 | asection *dynstr; | |
5848 | struct bfd_elf_version_tree *t; | |
5849 | struct bfd_elf_version_expr *d; | |
046183de | 5850 | asection *s; |
5a580b3a AM |
5851 | bfd_boolean all_defined; |
5852 | ||
3d4d4302 | 5853 | *sinterpptr = bfd_get_linker_section (dynobj, ".interp"); |
9b8b325a | 5854 | BFD_ASSERT (*sinterpptr != NULL || !bfd_link_executable (info) || info->nointerp); |
5a580b3a AM |
5855 | |
5856 | if (soname != NULL) | |
5857 | { | |
5858 | soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5859 | soname, TRUE); | |
5860 | if (soname_indx == (bfd_size_type) -1 | |
5861 | || !_bfd_elf_add_dynamic_entry (info, DT_SONAME, soname_indx)) | |
5862 | return FALSE; | |
5863 | } | |
5864 | ||
5865 | if (info->symbolic) | |
5866 | { | |
5867 | if (!_bfd_elf_add_dynamic_entry (info, DT_SYMBOLIC, 0)) | |
5868 | return FALSE; | |
5869 | info->flags |= DF_SYMBOLIC; | |
5870 | } | |
5871 | ||
5872 | if (rpath != NULL) | |
5873 | { | |
5874 | bfd_size_type indx; | |
b1b00fcc | 5875 | bfd_vma tag; |
5a580b3a AM |
5876 | |
5877 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath, | |
5878 | TRUE); | |
b1b00fcc | 5879 | if (indx == (bfd_size_type) -1) |
5a580b3a AM |
5880 | return FALSE; |
5881 | ||
b1b00fcc MF |
5882 | tag = info->new_dtags ? DT_RUNPATH : DT_RPATH; |
5883 | if (!_bfd_elf_add_dynamic_entry (info, tag, indx)) | |
5884 | return FALSE; | |
5a580b3a AM |
5885 | } |
5886 | ||
5887 | if (filter_shlib != NULL) | |
5888 | { | |
5889 | bfd_size_type indx; | |
5890 | ||
5891 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5892 | filter_shlib, TRUE); | |
5893 | if (indx == (bfd_size_type) -1 | |
5894 | || !_bfd_elf_add_dynamic_entry (info, DT_FILTER, indx)) | |
5895 | return FALSE; | |
5896 | } | |
5897 | ||
5898 | if (auxiliary_filters != NULL) | |
5899 | { | |
5900 | const char * const *p; | |
5901 | ||
5902 | for (p = auxiliary_filters; *p != NULL; p++) | |
5903 | { | |
5904 | bfd_size_type indx; | |
5905 | ||
5906 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5907 | *p, TRUE); | |
5908 | if (indx == (bfd_size_type) -1 | |
5909 | || !_bfd_elf_add_dynamic_entry (info, DT_AUXILIARY, indx)) | |
5910 | return FALSE; | |
5911 | } | |
5912 | } | |
5913 | ||
7ee314fa AM |
5914 | if (audit != NULL) |
5915 | { | |
5916 | bfd_size_type indx; | |
5917 | ||
5918 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, audit, | |
5919 | TRUE); | |
5920 | if (indx == (bfd_size_type) -1 | |
5921 | || !_bfd_elf_add_dynamic_entry (info, DT_AUDIT, indx)) | |
5922 | return FALSE; | |
5923 | } | |
5924 | ||
5925 | if (depaudit != NULL) | |
5926 | { | |
5927 | bfd_size_type indx; | |
5928 | ||
5929 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, depaudit, | |
5930 | TRUE); | |
5931 | if (indx == (bfd_size_type) -1 | |
5932 | || !_bfd_elf_add_dynamic_entry (info, DT_DEPAUDIT, indx)) | |
5933 | return FALSE; | |
5934 | } | |
5935 | ||
5a580b3a | 5936 | eif.info = info; |
5a580b3a AM |
5937 | eif.failed = FALSE; |
5938 | ||
5939 | /* If we are supposed to export all symbols into the dynamic symbol | |
5940 | table (this is not the normal case), then do so. */ | |
55255dae | 5941 | if (info->export_dynamic |
0e1862bb | 5942 | || (bfd_link_executable (info) && info->dynamic)) |
5a580b3a AM |
5943 | { |
5944 | elf_link_hash_traverse (elf_hash_table (info), | |
5945 | _bfd_elf_export_symbol, | |
5946 | &eif); | |
5947 | if (eif.failed) | |
5948 | return FALSE; | |
5949 | } | |
5950 | ||
5951 | /* Make all global versions with definition. */ | |
fd91d419 | 5952 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 5953 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 5954 | if (!d->symver && d->literal) |
5a580b3a AM |
5955 | { |
5956 | const char *verstr, *name; | |
5957 | size_t namelen, verlen, newlen; | |
93252b1c | 5958 | char *newname, *p, leading_char; |
5a580b3a AM |
5959 | struct elf_link_hash_entry *newh; |
5960 | ||
93252b1c | 5961 | leading_char = bfd_get_symbol_leading_char (output_bfd); |
ae5a3597 | 5962 | name = d->pattern; |
93252b1c | 5963 | namelen = strlen (name) + (leading_char != '\0'); |
5a580b3a AM |
5964 | verstr = t->name; |
5965 | verlen = strlen (verstr); | |
5966 | newlen = namelen + verlen + 3; | |
5967 | ||
a50b1753 | 5968 | newname = (char *) bfd_malloc (newlen); |
5a580b3a AM |
5969 | if (newname == NULL) |
5970 | return FALSE; | |
93252b1c MF |
5971 | newname[0] = leading_char; |
5972 | memcpy (newname + (leading_char != '\0'), name, namelen); | |
5a580b3a AM |
5973 | |
5974 | /* Check the hidden versioned definition. */ | |
5975 | p = newname + namelen; | |
5976 | *p++ = ELF_VER_CHR; | |
5977 | memcpy (p, verstr, verlen + 1); | |
5978 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
5979 | newname, FALSE, FALSE, | |
5980 | FALSE); | |
5981 | if (newh == NULL | |
5982 | || (newh->root.type != bfd_link_hash_defined | |
5983 | && newh->root.type != bfd_link_hash_defweak)) | |
5984 | { | |
5985 | /* Check the default versioned definition. */ | |
5986 | *p++ = ELF_VER_CHR; | |
5987 | memcpy (p, verstr, verlen + 1); | |
5988 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
5989 | newname, FALSE, FALSE, | |
5990 | FALSE); | |
5991 | } | |
5992 | free (newname); | |
5993 | ||
5994 | /* Mark this version if there is a definition and it is | |
5995 | not defined in a shared object. */ | |
5996 | if (newh != NULL | |
f5385ebf | 5997 | && !newh->def_dynamic |
5a580b3a AM |
5998 | && (newh->root.type == bfd_link_hash_defined |
5999 | || newh->root.type == bfd_link_hash_defweak)) | |
6000 | d->symver = 1; | |
6001 | } | |
6002 | ||
6003 | /* Attach all the symbols to their version information. */ | |
5a580b3a | 6004 | asvinfo.info = info; |
5a580b3a AM |
6005 | asvinfo.failed = FALSE; |
6006 | ||
6007 | elf_link_hash_traverse (elf_hash_table (info), | |
6008 | _bfd_elf_link_assign_sym_version, | |
6009 | &asvinfo); | |
6010 | if (asvinfo.failed) | |
6011 | return FALSE; | |
6012 | ||
6013 | if (!info->allow_undefined_version) | |
6014 | { | |
6015 | /* Check if all global versions have a definition. */ | |
6016 | all_defined = TRUE; | |
fd91d419 | 6017 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 6018 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 6019 | if (d->literal && !d->symver && !d->script) |
5a580b3a AM |
6020 | { |
6021 | (*_bfd_error_handler) | |
6022 | (_("%s: undefined version: %s"), | |
6023 | d->pattern, t->name); | |
6024 | all_defined = FALSE; | |
6025 | } | |
6026 | ||
6027 | if (!all_defined) | |
6028 | { | |
6029 | bfd_set_error (bfd_error_bad_value); | |
6030 | return FALSE; | |
6031 | } | |
6032 | } | |
6033 | ||
6034 | /* Find all symbols which were defined in a dynamic object and make | |
6035 | the backend pick a reasonable value for them. */ | |
6036 | elf_link_hash_traverse (elf_hash_table (info), | |
6037 | _bfd_elf_adjust_dynamic_symbol, | |
6038 | &eif); | |
6039 | if (eif.failed) | |
6040 | return FALSE; | |
6041 | ||
6042 | /* Add some entries to the .dynamic section. We fill in some of the | |
ee75fd95 | 6043 | values later, in bfd_elf_final_link, but we must add the entries |
5a580b3a AM |
6044 | now so that we know the final size of the .dynamic section. */ |
6045 | ||
6046 | /* If there are initialization and/or finalization functions to | |
6047 | call then add the corresponding DT_INIT/DT_FINI entries. */ | |
6048 | h = (info->init_function | |
6049 | ? elf_link_hash_lookup (elf_hash_table (info), | |
6050 | info->init_function, FALSE, | |
6051 | FALSE, FALSE) | |
6052 | : NULL); | |
6053 | if (h != NULL | |
f5385ebf AM |
6054 | && (h->ref_regular |
6055 | || h->def_regular)) | |
5a580b3a AM |
6056 | { |
6057 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT, 0)) | |
6058 | return FALSE; | |
6059 | } | |
6060 | h = (info->fini_function | |
6061 | ? elf_link_hash_lookup (elf_hash_table (info), | |
6062 | info->fini_function, FALSE, | |
6063 | FALSE, FALSE) | |
6064 | : NULL); | |
6065 | if (h != NULL | |
f5385ebf AM |
6066 | && (h->ref_regular |
6067 | || h->def_regular)) | |
5a580b3a AM |
6068 | { |
6069 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI, 0)) | |
6070 | return FALSE; | |
6071 | } | |
6072 | ||
046183de AM |
6073 | s = bfd_get_section_by_name (output_bfd, ".preinit_array"); |
6074 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
6075 | { |
6076 | /* DT_PREINIT_ARRAY is not allowed in shared library. */ | |
0e1862bb | 6077 | if (! bfd_link_executable (info)) |
5a580b3a AM |
6078 | { |
6079 | bfd *sub; | |
6080 | asection *o; | |
6081 | ||
6082 | for (sub = info->input_bfds; sub != NULL; | |
c72f2fb2 | 6083 | sub = sub->link.next) |
3fcd97f1 JJ |
6084 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour) |
6085 | for (o = sub->sections; o != NULL; o = o->next) | |
6086 | if (elf_section_data (o)->this_hdr.sh_type | |
6087 | == SHT_PREINIT_ARRAY) | |
6088 | { | |
6089 | (*_bfd_error_handler) | |
6090 | (_("%B: .preinit_array section is not allowed in DSO"), | |
6091 | sub); | |
6092 | break; | |
6093 | } | |
5a580b3a AM |
6094 | |
6095 | bfd_set_error (bfd_error_nonrepresentable_section); | |
6096 | return FALSE; | |
6097 | } | |
6098 | ||
6099 | if (!_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAY, 0) | |
6100 | || !_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAYSZ, 0)) | |
6101 | return FALSE; | |
6102 | } | |
046183de AM |
6103 | s = bfd_get_section_by_name (output_bfd, ".init_array"); |
6104 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
6105 | { |
6106 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAY, 0) | |
6107 | || !_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAYSZ, 0)) | |
6108 | return FALSE; | |
6109 | } | |
046183de AM |
6110 | s = bfd_get_section_by_name (output_bfd, ".fini_array"); |
6111 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
6112 | { |
6113 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAY, 0) | |
6114 | || !_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAYSZ, 0)) | |
6115 | return FALSE; | |
6116 | } | |
6117 | ||
3d4d4302 | 6118 | dynstr = bfd_get_linker_section (dynobj, ".dynstr"); |
5a580b3a AM |
6119 | /* If .dynstr is excluded from the link, we don't want any of |
6120 | these tags. Strictly, we should be checking each section | |
6121 | individually; This quick check covers for the case where | |
6122 | someone does a /DISCARD/ : { *(*) }. */ | |
6123 | if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr) | |
6124 | { | |
6125 | bfd_size_type strsize; | |
6126 | ||
6127 | strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); | |
fdc90cb4 JJ |
6128 | if ((info->emit_hash |
6129 | && !_bfd_elf_add_dynamic_entry (info, DT_HASH, 0)) | |
6130 | || (info->emit_gnu_hash | |
6131 | && !_bfd_elf_add_dynamic_entry (info, DT_GNU_HASH, 0)) | |
5a580b3a AM |
6132 | || !_bfd_elf_add_dynamic_entry (info, DT_STRTAB, 0) |
6133 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
6134 | || !_bfd_elf_add_dynamic_entry (info, DT_STRSZ, strsize) | |
6135 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMENT, | |
6136 | bed->s->sizeof_sym)) | |
6137 | return FALSE; | |
6138 | } | |
6139 | } | |
6140 | ||
de231f20 CM |
6141 | if (! _bfd_elf_maybe_strip_eh_frame_hdr (info)) |
6142 | return FALSE; | |
6143 | ||
5a580b3a AM |
6144 | /* The backend must work out the sizes of all the other dynamic |
6145 | sections. */ | |
9a2a56cc AM |
6146 | if (dynobj != NULL |
6147 | && bed->elf_backend_size_dynamic_sections != NULL | |
5a580b3a AM |
6148 | && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) |
6149 | return FALSE; | |
6150 | ||
9a2a56cc | 6151 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) |
5a580b3a | 6152 | { |
554220db | 6153 | unsigned long section_sym_count; |
fd91d419 | 6154 | struct bfd_elf_version_tree *verdefs; |
5a580b3a | 6155 | asection *s; |
5a580b3a AM |
6156 | |
6157 | /* Set up the version definition section. */ | |
3d4d4302 | 6158 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); |
5a580b3a AM |
6159 | BFD_ASSERT (s != NULL); |
6160 | ||
6161 | /* We may have created additional version definitions if we are | |
6162 | just linking a regular application. */ | |
fd91d419 | 6163 | verdefs = info->version_info; |
5a580b3a AM |
6164 | |
6165 | /* Skip anonymous version tag. */ | |
6166 | if (verdefs != NULL && verdefs->vernum == 0) | |
6167 | verdefs = verdefs->next; | |
6168 | ||
3e3b46e5 | 6169 | if (verdefs == NULL && !info->create_default_symver) |
8423293d | 6170 | s->flags |= SEC_EXCLUDE; |
5a580b3a AM |
6171 | else |
6172 | { | |
6173 | unsigned int cdefs; | |
6174 | bfd_size_type size; | |
6175 | struct bfd_elf_version_tree *t; | |
6176 | bfd_byte *p; | |
6177 | Elf_Internal_Verdef def; | |
6178 | Elf_Internal_Verdaux defaux; | |
3e3b46e5 PB |
6179 | struct bfd_link_hash_entry *bh; |
6180 | struct elf_link_hash_entry *h; | |
6181 | const char *name; | |
5a580b3a AM |
6182 | |
6183 | cdefs = 0; | |
6184 | size = 0; | |
6185 | ||
6186 | /* Make space for the base version. */ | |
6187 | size += sizeof (Elf_External_Verdef); | |
6188 | size += sizeof (Elf_External_Verdaux); | |
6189 | ++cdefs; | |
6190 | ||
3e3b46e5 PB |
6191 | /* Make space for the default version. */ |
6192 | if (info->create_default_symver) | |
6193 | { | |
6194 | size += sizeof (Elf_External_Verdef); | |
6195 | ++cdefs; | |
6196 | } | |
6197 | ||
5a580b3a AM |
6198 | for (t = verdefs; t != NULL; t = t->next) |
6199 | { | |
6200 | struct bfd_elf_version_deps *n; | |
6201 | ||
a6cc6b3b RO |
6202 | /* Don't emit base version twice. */ |
6203 | if (t->vernum == 0) | |
6204 | continue; | |
6205 | ||
5a580b3a AM |
6206 | size += sizeof (Elf_External_Verdef); |
6207 | size += sizeof (Elf_External_Verdaux); | |
6208 | ++cdefs; | |
6209 | ||
6210 | for (n = t->deps; n != NULL; n = n->next) | |
6211 | size += sizeof (Elf_External_Verdaux); | |
6212 | } | |
6213 | ||
eea6121a | 6214 | s->size = size; |
a50b1753 | 6215 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
eea6121a | 6216 | if (s->contents == NULL && s->size != 0) |
5a580b3a AM |
6217 | return FALSE; |
6218 | ||
6219 | /* Fill in the version definition section. */ | |
6220 | ||
6221 | p = s->contents; | |
6222 | ||
6223 | def.vd_version = VER_DEF_CURRENT; | |
6224 | def.vd_flags = VER_FLG_BASE; | |
6225 | def.vd_ndx = 1; | |
6226 | def.vd_cnt = 1; | |
3e3b46e5 PB |
6227 | if (info->create_default_symver) |
6228 | { | |
6229 | def.vd_aux = 2 * sizeof (Elf_External_Verdef); | |
6230 | def.vd_next = sizeof (Elf_External_Verdef); | |
6231 | } | |
6232 | else | |
6233 | { | |
6234 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6235 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6236 | + sizeof (Elf_External_Verdaux)); | |
6237 | } | |
5a580b3a AM |
6238 | |
6239 | if (soname_indx != (bfd_size_type) -1) | |
6240 | { | |
6241 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6242 | soname_indx); | |
6243 | def.vd_hash = bfd_elf_hash (soname); | |
6244 | defaux.vda_name = soname_indx; | |
3e3b46e5 | 6245 | name = soname; |
5a580b3a AM |
6246 | } |
6247 | else | |
6248 | { | |
5a580b3a AM |
6249 | bfd_size_type indx; |
6250 | ||
06084812 | 6251 | name = lbasename (output_bfd->filename); |
5a580b3a AM |
6252 | def.vd_hash = bfd_elf_hash (name); |
6253 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6254 | name, FALSE); | |
6255 | if (indx == (bfd_size_type) -1) | |
6256 | return FALSE; | |
6257 | defaux.vda_name = indx; | |
6258 | } | |
6259 | defaux.vda_next = 0; | |
6260 | ||
6261 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6262 | (Elf_External_Verdef *) p); | |
6263 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
6264 | if (info->create_default_symver) |
6265 | { | |
6266 | /* Add a symbol representing this version. */ | |
6267 | bh = NULL; | |
6268 | if (! (_bfd_generic_link_add_one_symbol | |
6269 | (info, dynobj, name, BSF_GLOBAL, bfd_abs_section_ptr, | |
6270 | 0, NULL, FALSE, | |
6271 | get_elf_backend_data (dynobj)->collect, &bh))) | |
6272 | return FALSE; | |
6273 | h = (struct elf_link_hash_entry *) bh; | |
6274 | h->non_elf = 0; | |
6275 | h->def_regular = 1; | |
6276 | h->type = STT_OBJECT; | |
6277 | h->verinfo.vertree = NULL; | |
6278 | ||
6279 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
6280 | return FALSE; | |
6281 | ||
6282 | /* Create a duplicate of the base version with the same | |
6283 | aux block, but different flags. */ | |
6284 | def.vd_flags = 0; | |
6285 | def.vd_ndx = 2; | |
6286 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6287 | if (verdefs) | |
6288 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6289 | + sizeof (Elf_External_Verdaux)); | |
6290 | else | |
6291 | def.vd_next = 0; | |
6292 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6293 | (Elf_External_Verdef *) p); | |
6294 | p += sizeof (Elf_External_Verdef); | |
6295 | } | |
5a580b3a AM |
6296 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, |
6297 | (Elf_External_Verdaux *) p); | |
6298 | p += sizeof (Elf_External_Verdaux); | |
6299 | ||
6300 | for (t = verdefs; t != NULL; t = t->next) | |
6301 | { | |
6302 | unsigned int cdeps; | |
6303 | struct bfd_elf_version_deps *n; | |
5a580b3a | 6304 | |
a6cc6b3b RO |
6305 | /* Don't emit the base version twice. */ |
6306 | if (t->vernum == 0) | |
6307 | continue; | |
6308 | ||
5a580b3a AM |
6309 | cdeps = 0; |
6310 | for (n = t->deps; n != NULL; n = n->next) | |
6311 | ++cdeps; | |
6312 | ||
6313 | /* Add a symbol representing this version. */ | |
6314 | bh = NULL; | |
6315 | if (! (_bfd_generic_link_add_one_symbol | |
6316 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
6317 | 0, NULL, FALSE, | |
6318 | get_elf_backend_data (dynobj)->collect, &bh))) | |
6319 | return FALSE; | |
6320 | h = (struct elf_link_hash_entry *) bh; | |
f5385ebf AM |
6321 | h->non_elf = 0; |
6322 | h->def_regular = 1; | |
5a580b3a AM |
6323 | h->type = STT_OBJECT; |
6324 | h->verinfo.vertree = t; | |
6325 | ||
c152c796 | 6326 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
5a580b3a AM |
6327 | return FALSE; |
6328 | ||
6329 | def.vd_version = VER_DEF_CURRENT; | |
6330 | def.vd_flags = 0; | |
6331 | if (t->globals.list == NULL | |
6332 | && t->locals.list == NULL | |
6333 | && ! t->used) | |
6334 | def.vd_flags |= VER_FLG_WEAK; | |
3e3b46e5 | 6335 | def.vd_ndx = t->vernum + (info->create_default_symver ? 2 : 1); |
5a580b3a AM |
6336 | def.vd_cnt = cdeps + 1; |
6337 | def.vd_hash = bfd_elf_hash (t->name); | |
6338 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6339 | def.vd_next = 0; | |
a6cc6b3b RO |
6340 | |
6341 | /* If a basever node is next, it *must* be the last node in | |
6342 | the chain, otherwise Verdef construction breaks. */ | |
6343 | if (t->next != NULL && t->next->vernum == 0) | |
6344 | BFD_ASSERT (t->next->next == NULL); | |
6345 | ||
6346 | if (t->next != NULL && t->next->vernum != 0) | |
5a580b3a AM |
6347 | def.vd_next = (sizeof (Elf_External_Verdef) |
6348 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
6349 | ||
6350 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6351 | (Elf_External_Verdef *) p); | |
6352 | p += sizeof (Elf_External_Verdef); | |
6353 | ||
6354 | defaux.vda_name = h->dynstr_index; | |
6355 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6356 | h->dynstr_index); | |
6357 | defaux.vda_next = 0; | |
6358 | if (t->deps != NULL) | |
6359 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6360 | t->name_indx = defaux.vda_name; | |
6361 | ||
6362 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6363 | (Elf_External_Verdaux *) p); | |
6364 | p += sizeof (Elf_External_Verdaux); | |
6365 | ||
6366 | for (n = t->deps; n != NULL; n = n->next) | |
6367 | { | |
6368 | if (n->version_needed == NULL) | |
6369 | { | |
6370 | /* This can happen if there was an error in the | |
6371 | version script. */ | |
6372 | defaux.vda_name = 0; | |
6373 | } | |
6374 | else | |
6375 | { | |
6376 | defaux.vda_name = n->version_needed->name_indx; | |
6377 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6378 | defaux.vda_name); | |
6379 | } | |
6380 | if (n->next == NULL) | |
6381 | defaux.vda_next = 0; | |
6382 | else | |
6383 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6384 | ||
6385 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6386 | (Elf_External_Verdaux *) p); | |
6387 | p += sizeof (Elf_External_Verdaux); | |
6388 | } | |
6389 | } | |
6390 | ||
6391 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERDEF, 0) | |
6392 | || !_bfd_elf_add_dynamic_entry (info, DT_VERDEFNUM, cdefs)) | |
6393 | return FALSE; | |
6394 | ||
6395 | elf_tdata (output_bfd)->cverdefs = cdefs; | |
6396 | } | |
6397 | ||
6398 | if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS)) | |
6399 | { | |
6400 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS, info->flags)) | |
6401 | return FALSE; | |
6402 | } | |
6403 | else if (info->flags & DF_BIND_NOW) | |
6404 | { | |
6405 | if (!_bfd_elf_add_dynamic_entry (info, DT_BIND_NOW, 0)) | |
6406 | return FALSE; | |
6407 | } | |
6408 | ||
6409 | if (info->flags_1) | |
6410 | { | |
0e1862bb | 6411 | if (bfd_link_executable (info)) |
5a580b3a AM |
6412 | info->flags_1 &= ~ (DF_1_INITFIRST |
6413 | | DF_1_NODELETE | |
6414 | | DF_1_NOOPEN); | |
6415 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS_1, info->flags_1)) | |
6416 | return FALSE; | |
6417 | } | |
6418 | ||
6419 | /* Work out the size of the version reference section. */ | |
6420 | ||
3d4d4302 | 6421 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); |
5a580b3a AM |
6422 | BFD_ASSERT (s != NULL); |
6423 | { | |
6424 | struct elf_find_verdep_info sinfo; | |
6425 | ||
5a580b3a AM |
6426 | sinfo.info = info; |
6427 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
6428 | if (sinfo.vers == 0) | |
6429 | sinfo.vers = 1; | |
6430 | sinfo.failed = FALSE; | |
6431 | ||
6432 | elf_link_hash_traverse (elf_hash_table (info), | |
6433 | _bfd_elf_link_find_version_dependencies, | |
6434 | &sinfo); | |
14b1c01e AM |
6435 | if (sinfo.failed) |
6436 | return FALSE; | |
5a580b3a AM |
6437 | |
6438 | if (elf_tdata (output_bfd)->verref == NULL) | |
8423293d | 6439 | s->flags |= SEC_EXCLUDE; |
5a580b3a AM |
6440 | else |
6441 | { | |
6442 | Elf_Internal_Verneed *t; | |
6443 | unsigned int size; | |
6444 | unsigned int crefs; | |
6445 | bfd_byte *p; | |
6446 | ||
a6cc6b3b | 6447 | /* Build the version dependency section. */ |
5a580b3a AM |
6448 | size = 0; |
6449 | crefs = 0; | |
6450 | for (t = elf_tdata (output_bfd)->verref; | |
6451 | t != NULL; | |
6452 | t = t->vn_nextref) | |
6453 | { | |
6454 | Elf_Internal_Vernaux *a; | |
6455 | ||
6456 | size += sizeof (Elf_External_Verneed); | |
6457 | ++crefs; | |
6458 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6459 | size += sizeof (Elf_External_Vernaux); | |
6460 | } | |
6461 | ||
eea6121a | 6462 | s->size = size; |
a50b1753 | 6463 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
5a580b3a AM |
6464 | if (s->contents == NULL) |
6465 | return FALSE; | |
6466 | ||
6467 | p = s->contents; | |
6468 | for (t = elf_tdata (output_bfd)->verref; | |
6469 | t != NULL; | |
6470 | t = t->vn_nextref) | |
6471 | { | |
6472 | unsigned int caux; | |
6473 | Elf_Internal_Vernaux *a; | |
6474 | bfd_size_type indx; | |
6475 | ||
6476 | caux = 0; | |
6477 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6478 | ++caux; | |
6479 | ||
6480 | t->vn_version = VER_NEED_CURRENT; | |
6481 | t->vn_cnt = caux; | |
6482 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6483 | elf_dt_name (t->vn_bfd) != NULL | |
6484 | ? elf_dt_name (t->vn_bfd) | |
06084812 | 6485 | : lbasename (t->vn_bfd->filename), |
5a580b3a AM |
6486 | FALSE); |
6487 | if (indx == (bfd_size_type) -1) | |
6488 | return FALSE; | |
6489 | t->vn_file = indx; | |
6490 | t->vn_aux = sizeof (Elf_External_Verneed); | |
6491 | if (t->vn_nextref == NULL) | |
6492 | t->vn_next = 0; | |
6493 | else | |
6494 | t->vn_next = (sizeof (Elf_External_Verneed) | |
6495 | + caux * sizeof (Elf_External_Vernaux)); | |
6496 | ||
6497 | _bfd_elf_swap_verneed_out (output_bfd, t, | |
6498 | (Elf_External_Verneed *) p); | |
6499 | p += sizeof (Elf_External_Verneed); | |
6500 | ||
6501 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6502 | { | |
6503 | a->vna_hash = bfd_elf_hash (a->vna_nodename); | |
6504 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6505 | a->vna_nodename, FALSE); | |
6506 | if (indx == (bfd_size_type) -1) | |
6507 | return FALSE; | |
6508 | a->vna_name = indx; | |
6509 | if (a->vna_nextptr == NULL) | |
6510 | a->vna_next = 0; | |
6511 | else | |
6512 | a->vna_next = sizeof (Elf_External_Vernaux); | |
6513 | ||
6514 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
6515 | (Elf_External_Vernaux *) p); | |
6516 | p += sizeof (Elf_External_Vernaux); | |
6517 | } | |
6518 | } | |
6519 | ||
6520 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERNEED, 0) | |
6521 | || !_bfd_elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs)) | |
6522 | return FALSE; | |
6523 | ||
6524 | elf_tdata (output_bfd)->cverrefs = crefs; | |
6525 | } | |
6526 | } | |
6527 | ||
8423293d AM |
6528 | if ((elf_tdata (output_bfd)->cverrefs == 0 |
6529 | && elf_tdata (output_bfd)->cverdefs == 0) | |
6530 | || _bfd_elf_link_renumber_dynsyms (output_bfd, info, | |
6531 | §ion_sym_count) == 0) | |
6532 | { | |
3d4d4302 | 6533 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
8423293d AM |
6534 | s->flags |= SEC_EXCLUDE; |
6535 | } | |
6536 | } | |
6537 | return TRUE; | |
6538 | } | |
6539 | ||
74541ad4 AM |
6540 | /* Find the first non-excluded output section. We'll use its |
6541 | section symbol for some emitted relocs. */ | |
6542 | void | |
6543 | _bfd_elf_init_1_index_section (bfd *output_bfd, struct bfd_link_info *info) | |
6544 | { | |
6545 | asection *s; | |
6546 | ||
6547 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
6548 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC | |
6549 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) | |
6550 | { | |
6551 | elf_hash_table (info)->text_index_section = s; | |
6552 | break; | |
6553 | } | |
6554 | } | |
6555 | ||
6556 | /* Find two non-excluded output sections, one for code, one for data. | |
6557 | We'll use their section symbols for some emitted relocs. */ | |
6558 | void | |
6559 | _bfd_elf_init_2_index_sections (bfd *output_bfd, struct bfd_link_info *info) | |
6560 | { | |
6561 | asection *s; | |
6562 | ||
266b05cf DJ |
6563 | /* Data first, since setting text_index_section changes |
6564 | _bfd_elf_link_omit_section_dynsym. */ | |
74541ad4 | 6565 | for (s = output_bfd->sections; s != NULL; s = s->next) |
266b05cf | 6566 | if (((s->flags & (SEC_EXCLUDE | SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC) |
74541ad4 AM |
6567 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) |
6568 | { | |
266b05cf | 6569 | elf_hash_table (info)->data_index_section = s; |
74541ad4 AM |
6570 | break; |
6571 | } | |
6572 | ||
6573 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
266b05cf DJ |
6574 | if (((s->flags & (SEC_EXCLUDE | SEC_ALLOC | SEC_READONLY)) |
6575 | == (SEC_ALLOC | SEC_READONLY)) | |
74541ad4 AM |
6576 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) |
6577 | { | |
266b05cf | 6578 | elf_hash_table (info)->text_index_section = s; |
74541ad4 AM |
6579 | break; |
6580 | } | |
6581 | ||
6582 | if (elf_hash_table (info)->text_index_section == NULL) | |
6583 | elf_hash_table (info)->text_index_section | |
6584 | = elf_hash_table (info)->data_index_section; | |
6585 | } | |
6586 | ||
8423293d AM |
6587 | bfd_boolean |
6588 | bfd_elf_size_dynsym_hash_dynstr (bfd *output_bfd, struct bfd_link_info *info) | |
6589 | { | |
74541ad4 AM |
6590 | const struct elf_backend_data *bed; |
6591 | ||
8423293d AM |
6592 | if (!is_elf_hash_table (info->hash)) |
6593 | return TRUE; | |
6594 | ||
74541ad4 AM |
6595 | bed = get_elf_backend_data (output_bfd); |
6596 | (*bed->elf_backend_init_index_section) (output_bfd, info); | |
6597 | ||
8423293d AM |
6598 | if (elf_hash_table (info)->dynamic_sections_created) |
6599 | { | |
6600 | bfd *dynobj; | |
8423293d AM |
6601 | asection *s; |
6602 | bfd_size_type dynsymcount; | |
6603 | unsigned long section_sym_count; | |
8423293d AM |
6604 | unsigned int dtagcount; |
6605 | ||
6606 | dynobj = elf_hash_table (info)->dynobj; | |
6607 | ||
5a580b3a AM |
6608 | /* Assign dynsym indicies. In a shared library we generate a |
6609 | section symbol for each output section, which come first. | |
6610 | Next come all of the back-end allocated local dynamic syms, | |
6611 | followed by the rest of the global symbols. */ | |
6612 | ||
554220db AM |
6613 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info, |
6614 | §ion_sym_count); | |
5a580b3a AM |
6615 | |
6616 | /* Work out the size of the symbol version section. */ | |
3d4d4302 | 6617 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
5a580b3a | 6618 | BFD_ASSERT (s != NULL); |
d5486c43 | 6619 | if ((s->flags & SEC_EXCLUDE) == 0) |
5a580b3a | 6620 | { |
eea6121a | 6621 | s->size = dynsymcount * sizeof (Elf_External_Versym); |
a50b1753 | 6622 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
5a580b3a AM |
6623 | if (s->contents == NULL) |
6624 | return FALSE; | |
6625 | ||
6626 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERSYM, 0)) | |
6627 | return FALSE; | |
6628 | } | |
6629 | ||
6630 | /* Set the size of the .dynsym and .hash sections. We counted | |
6631 | the number of dynamic symbols in elf_link_add_object_symbols. | |
6632 | We will build the contents of .dynsym and .hash when we build | |
6633 | the final symbol table, because until then we do not know the | |
6634 | correct value to give the symbols. We built the .dynstr | |
6635 | section as we went along in elf_link_add_object_symbols. */ | |
cae1fbbb | 6636 | s = elf_hash_table (info)->dynsym; |
5a580b3a | 6637 | BFD_ASSERT (s != NULL); |
eea6121a | 6638 | s->size = dynsymcount * bed->s->sizeof_sym; |
5a580b3a | 6639 | |
d5486c43 L |
6640 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
6641 | if (s->contents == NULL) | |
6642 | return FALSE; | |
5a580b3a | 6643 | |
d5486c43 L |
6644 | /* The first entry in .dynsym is a dummy symbol. Clear all the |
6645 | section syms, in case we don't output them all. */ | |
6646 | ++section_sym_count; | |
6647 | memset (s->contents, 0, section_sym_count * bed->s->sizeof_sym); | |
5a580b3a | 6648 | |
fdc90cb4 JJ |
6649 | elf_hash_table (info)->bucketcount = 0; |
6650 | ||
5a580b3a AM |
6651 | /* Compute the size of the hashing table. As a side effect this |
6652 | computes the hash values for all the names we export. */ | |
fdc90cb4 JJ |
6653 | if (info->emit_hash) |
6654 | { | |
6655 | unsigned long int *hashcodes; | |
14b1c01e | 6656 | struct hash_codes_info hashinf; |
fdc90cb4 JJ |
6657 | bfd_size_type amt; |
6658 | unsigned long int nsyms; | |
6659 | size_t bucketcount; | |
6660 | size_t hash_entry_size; | |
6661 | ||
6662 | /* Compute the hash values for all exported symbols. At the same | |
6663 | time store the values in an array so that we could use them for | |
6664 | optimizations. */ | |
6665 | amt = dynsymcount * sizeof (unsigned long int); | |
a50b1753 | 6666 | hashcodes = (unsigned long int *) bfd_malloc (amt); |
fdc90cb4 JJ |
6667 | if (hashcodes == NULL) |
6668 | return FALSE; | |
14b1c01e AM |
6669 | hashinf.hashcodes = hashcodes; |
6670 | hashinf.error = FALSE; | |
5a580b3a | 6671 | |
fdc90cb4 JJ |
6672 | /* Put all hash values in HASHCODES. */ |
6673 | elf_link_hash_traverse (elf_hash_table (info), | |
14b1c01e AM |
6674 | elf_collect_hash_codes, &hashinf); |
6675 | if (hashinf.error) | |
4dd07732 AM |
6676 | { |
6677 | free (hashcodes); | |
6678 | return FALSE; | |
6679 | } | |
5a580b3a | 6680 | |
14b1c01e | 6681 | nsyms = hashinf.hashcodes - hashcodes; |
fdc90cb4 JJ |
6682 | bucketcount |
6683 | = compute_bucket_count (info, hashcodes, nsyms, 0); | |
6684 | free (hashcodes); | |
6685 | ||
6686 | if (bucketcount == 0) | |
6687 | return FALSE; | |
5a580b3a | 6688 | |
fdc90cb4 JJ |
6689 | elf_hash_table (info)->bucketcount = bucketcount; |
6690 | ||
3d4d4302 | 6691 | s = bfd_get_linker_section (dynobj, ".hash"); |
fdc90cb4 JJ |
6692 | BFD_ASSERT (s != NULL); |
6693 | hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize; | |
6694 | s->size = ((2 + bucketcount + dynsymcount) * hash_entry_size); | |
a50b1753 | 6695 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6696 | if (s->contents == NULL) |
6697 | return FALSE; | |
6698 | ||
6699 | bfd_put (8 * hash_entry_size, output_bfd, bucketcount, s->contents); | |
6700 | bfd_put (8 * hash_entry_size, output_bfd, dynsymcount, | |
6701 | s->contents + hash_entry_size); | |
6702 | } | |
6703 | ||
6704 | if (info->emit_gnu_hash) | |
6705 | { | |
6706 | size_t i, cnt; | |
6707 | unsigned char *contents; | |
6708 | struct collect_gnu_hash_codes cinfo; | |
6709 | bfd_size_type amt; | |
6710 | size_t bucketcount; | |
6711 | ||
6712 | memset (&cinfo, 0, sizeof (cinfo)); | |
6713 | ||
6714 | /* Compute the hash values for all exported symbols. At the same | |
6715 | time store the values in an array so that we could use them for | |
6716 | optimizations. */ | |
6717 | amt = dynsymcount * 2 * sizeof (unsigned long int); | |
a50b1753 | 6718 | cinfo.hashcodes = (long unsigned int *) bfd_malloc (amt); |
fdc90cb4 JJ |
6719 | if (cinfo.hashcodes == NULL) |
6720 | return FALSE; | |
6721 | ||
6722 | cinfo.hashval = cinfo.hashcodes + dynsymcount; | |
6723 | cinfo.min_dynindx = -1; | |
6724 | cinfo.output_bfd = output_bfd; | |
6725 | cinfo.bed = bed; | |
6726 | ||
6727 | /* Put all hash values in HASHCODES. */ | |
6728 | elf_link_hash_traverse (elf_hash_table (info), | |
6729 | elf_collect_gnu_hash_codes, &cinfo); | |
14b1c01e | 6730 | if (cinfo.error) |
4dd07732 AM |
6731 | { |
6732 | free (cinfo.hashcodes); | |
6733 | return FALSE; | |
6734 | } | |
fdc90cb4 JJ |
6735 | |
6736 | bucketcount | |
6737 | = compute_bucket_count (info, cinfo.hashcodes, cinfo.nsyms, 1); | |
6738 | ||
6739 | if (bucketcount == 0) | |
6740 | { | |
6741 | free (cinfo.hashcodes); | |
6742 | return FALSE; | |
6743 | } | |
6744 | ||
3d4d4302 | 6745 | s = bfd_get_linker_section (dynobj, ".gnu.hash"); |
fdc90cb4 JJ |
6746 | BFD_ASSERT (s != NULL); |
6747 | ||
6748 | if (cinfo.nsyms == 0) | |
6749 | { | |
6750 | /* Empty .gnu.hash section is special. */ | |
6751 | BFD_ASSERT (cinfo.min_dynindx == -1); | |
6752 | free (cinfo.hashcodes); | |
6753 | s->size = 5 * 4 + bed->s->arch_size / 8; | |
a50b1753 | 6754 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6755 | if (contents == NULL) |
6756 | return FALSE; | |
6757 | s->contents = contents; | |
6758 | /* 1 empty bucket. */ | |
6759 | bfd_put_32 (output_bfd, 1, contents); | |
6760 | /* SYMIDX above the special symbol 0. */ | |
6761 | bfd_put_32 (output_bfd, 1, contents + 4); | |
6762 | /* Just one word for bitmask. */ | |
6763 | bfd_put_32 (output_bfd, 1, contents + 8); | |
6764 | /* Only hash fn bloom filter. */ | |
6765 | bfd_put_32 (output_bfd, 0, contents + 12); | |
6766 | /* No hashes are valid - empty bitmask. */ | |
6767 | bfd_put (bed->s->arch_size, output_bfd, 0, contents + 16); | |
6768 | /* No hashes in the only bucket. */ | |
6769 | bfd_put_32 (output_bfd, 0, | |
6770 | contents + 16 + bed->s->arch_size / 8); | |
6771 | } | |
6772 | else | |
6773 | { | |
9e6619e2 | 6774 | unsigned long int maskwords, maskbitslog2, x; |
0b33793d | 6775 | BFD_ASSERT (cinfo.min_dynindx != -1); |
fdc90cb4 | 6776 | |
9e6619e2 AM |
6777 | x = cinfo.nsyms; |
6778 | maskbitslog2 = 1; | |
6779 | while ((x >>= 1) != 0) | |
6780 | ++maskbitslog2; | |
fdc90cb4 JJ |
6781 | if (maskbitslog2 < 3) |
6782 | maskbitslog2 = 5; | |
6783 | else if ((1 << (maskbitslog2 - 2)) & cinfo.nsyms) | |
6784 | maskbitslog2 = maskbitslog2 + 3; | |
6785 | else | |
6786 | maskbitslog2 = maskbitslog2 + 2; | |
6787 | if (bed->s->arch_size == 64) | |
6788 | { | |
6789 | if (maskbitslog2 == 5) | |
6790 | maskbitslog2 = 6; | |
6791 | cinfo.shift1 = 6; | |
6792 | } | |
6793 | else | |
6794 | cinfo.shift1 = 5; | |
6795 | cinfo.mask = (1 << cinfo.shift1) - 1; | |
2ccdbfcc | 6796 | cinfo.shift2 = maskbitslog2; |
fdc90cb4 JJ |
6797 | cinfo.maskbits = 1 << maskbitslog2; |
6798 | maskwords = 1 << (maskbitslog2 - cinfo.shift1); | |
6799 | amt = bucketcount * sizeof (unsigned long int) * 2; | |
6800 | amt += maskwords * sizeof (bfd_vma); | |
a50b1753 | 6801 | cinfo.bitmask = (bfd_vma *) bfd_malloc (amt); |
fdc90cb4 JJ |
6802 | if (cinfo.bitmask == NULL) |
6803 | { | |
6804 | free (cinfo.hashcodes); | |
6805 | return FALSE; | |
6806 | } | |
6807 | ||
a50b1753 | 6808 | cinfo.counts = (long unsigned int *) (cinfo.bitmask + maskwords); |
fdc90cb4 JJ |
6809 | cinfo.indx = cinfo.counts + bucketcount; |
6810 | cinfo.symindx = dynsymcount - cinfo.nsyms; | |
6811 | memset (cinfo.bitmask, 0, maskwords * sizeof (bfd_vma)); | |
6812 | ||
6813 | /* Determine how often each hash bucket is used. */ | |
6814 | memset (cinfo.counts, 0, bucketcount * sizeof (cinfo.counts[0])); | |
6815 | for (i = 0; i < cinfo.nsyms; ++i) | |
6816 | ++cinfo.counts[cinfo.hashcodes[i] % bucketcount]; | |
6817 | ||
6818 | for (i = 0, cnt = cinfo.symindx; i < bucketcount; ++i) | |
6819 | if (cinfo.counts[i] != 0) | |
6820 | { | |
6821 | cinfo.indx[i] = cnt; | |
6822 | cnt += cinfo.counts[i]; | |
6823 | } | |
6824 | BFD_ASSERT (cnt == dynsymcount); | |
6825 | cinfo.bucketcount = bucketcount; | |
6826 | cinfo.local_indx = cinfo.min_dynindx; | |
6827 | ||
6828 | s->size = (4 + bucketcount + cinfo.nsyms) * 4; | |
6829 | s->size += cinfo.maskbits / 8; | |
a50b1753 | 6830 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6831 | if (contents == NULL) |
6832 | { | |
6833 | free (cinfo.bitmask); | |
6834 | free (cinfo.hashcodes); | |
6835 | return FALSE; | |
6836 | } | |
6837 | ||
6838 | s->contents = contents; | |
6839 | bfd_put_32 (output_bfd, bucketcount, contents); | |
6840 | bfd_put_32 (output_bfd, cinfo.symindx, contents + 4); | |
6841 | bfd_put_32 (output_bfd, maskwords, contents + 8); | |
6842 | bfd_put_32 (output_bfd, cinfo.shift2, contents + 12); | |
6843 | contents += 16 + cinfo.maskbits / 8; | |
6844 | ||
6845 | for (i = 0; i < bucketcount; ++i) | |
6846 | { | |
6847 | if (cinfo.counts[i] == 0) | |
6848 | bfd_put_32 (output_bfd, 0, contents); | |
6849 | else | |
6850 | bfd_put_32 (output_bfd, cinfo.indx[i], contents); | |
6851 | contents += 4; | |
6852 | } | |
6853 | ||
6854 | cinfo.contents = contents; | |
6855 | ||
6856 | /* Renumber dynamic symbols, populate .gnu.hash section. */ | |
6857 | elf_link_hash_traverse (elf_hash_table (info), | |
6858 | elf_renumber_gnu_hash_syms, &cinfo); | |
6859 | ||
6860 | contents = s->contents + 16; | |
6861 | for (i = 0; i < maskwords; ++i) | |
6862 | { | |
6863 | bfd_put (bed->s->arch_size, output_bfd, cinfo.bitmask[i], | |
6864 | contents); | |
6865 | contents += bed->s->arch_size / 8; | |
6866 | } | |
6867 | ||
6868 | free (cinfo.bitmask); | |
6869 | free (cinfo.hashcodes); | |
6870 | } | |
6871 | } | |
5a580b3a | 6872 | |
3d4d4302 | 6873 | s = bfd_get_linker_section (dynobj, ".dynstr"); |
5a580b3a AM |
6874 | BFD_ASSERT (s != NULL); |
6875 | ||
4ad4eba5 | 6876 | elf_finalize_dynstr (output_bfd, info); |
5a580b3a | 6877 | |
eea6121a | 6878 | s->size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
5a580b3a AM |
6879 | |
6880 | for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount) | |
6881 | if (!_bfd_elf_add_dynamic_entry (info, DT_NULL, 0)) | |
6882 | return FALSE; | |
6883 | } | |
6884 | ||
6885 | return TRUE; | |
6886 | } | |
4d269e42 | 6887 | \f |
4d269e42 AM |
6888 | /* Make sure sec_info_type is cleared if sec_info is cleared too. */ |
6889 | ||
6890 | static void | |
6891 | merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED, | |
6892 | asection *sec) | |
6893 | { | |
dbaa2011 AM |
6894 | BFD_ASSERT (sec->sec_info_type == SEC_INFO_TYPE_MERGE); |
6895 | sec->sec_info_type = SEC_INFO_TYPE_NONE; | |
4d269e42 AM |
6896 | } |
6897 | ||
6898 | /* Finish SHF_MERGE section merging. */ | |
6899 | ||
6900 | bfd_boolean | |
630993ec | 6901 | _bfd_elf_merge_sections (bfd *obfd, struct bfd_link_info *info) |
4d269e42 AM |
6902 | { |
6903 | bfd *ibfd; | |
6904 | asection *sec; | |
6905 | ||
6906 | if (!is_elf_hash_table (info->hash)) | |
6907 | return FALSE; | |
6908 | ||
c72f2fb2 | 6909 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
630993ec AM |
6910 | if ((ibfd->flags & DYNAMIC) == 0 |
6911 | && bfd_get_flavour (ibfd) == bfd_target_elf_flavour | |
017e6bce AM |
6912 | && (elf_elfheader (ibfd)->e_ident[EI_CLASS] |
6913 | == get_elf_backend_data (obfd)->s->elfclass)) | |
4d269e42 AM |
6914 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
6915 | if ((sec->flags & SEC_MERGE) != 0 | |
6916 | && !bfd_is_abs_section (sec->output_section)) | |
6917 | { | |
6918 | struct bfd_elf_section_data *secdata; | |
6919 | ||
6920 | secdata = elf_section_data (sec); | |
630993ec | 6921 | if (! _bfd_add_merge_section (obfd, |
4d269e42 AM |
6922 | &elf_hash_table (info)->merge_info, |
6923 | sec, &secdata->sec_info)) | |
6924 | return FALSE; | |
6925 | else if (secdata->sec_info) | |
dbaa2011 | 6926 | sec->sec_info_type = SEC_INFO_TYPE_MERGE; |
4d269e42 AM |
6927 | } |
6928 | ||
6929 | if (elf_hash_table (info)->merge_info != NULL) | |
630993ec | 6930 | _bfd_merge_sections (obfd, info, elf_hash_table (info)->merge_info, |
4d269e42 AM |
6931 | merge_sections_remove_hook); |
6932 | return TRUE; | |
6933 | } | |
6934 | ||
6935 | /* Create an entry in an ELF linker hash table. */ | |
6936 | ||
6937 | struct bfd_hash_entry * | |
6938 | _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry, | |
6939 | struct bfd_hash_table *table, | |
6940 | const char *string) | |
6941 | { | |
6942 | /* Allocate the structure if it has not already been allocated by a | |
6943 | subclass. */ | |
6944 | if (entry == NULL) | |
6945 | { | |
a50b1753 | 6946 | entry = (struct bfd_hash_entry *) |
ca4be51c | 6947 | bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)); |
4d269e42 AM |
6948 | if (entry == NULL) |
6949 | return entry; | |
6950 | } | |
6951 | ||
6952 | /* Call the allocation method of the superclass. */ | |
6953 | entry = _bfd_link_hash_newfunc (entry, table, string); | |
6954 | if (entry != NULL) | |
6955 | { | |
6956 | struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry; | |
6957 | struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table; | |
6958 | ||
6959 | /* Set local fields. */ | |
6960 | ret->indx = -1; | |
6961 | ret->dynindx = -1; | |
6962 | ret->got = htab->init_got_refcount; | |
6963 | ret->plt = htab->init_plt_refcount; | |
6964 | memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry) | |
6965 | - offsetof (struct elf_link_hash_entry, size))); | |
6966 | /* Assume that we have been called by a non-ELF symbol reader. | |
6967 | This flag is then reset by the code which reads an ELF input | |
6968 | file. This ensures that a symbol created by a non-ELF symbol | |
6969 | reader will have the flag set correctly. */ | |
6970 | ret->non_elf = 1; | |
6971 | } | |
6972 | ||
6973 | return entry; | |
6974 | } | |
6975 | ||
6976 | /* Copy data from an indirect symbol to its direct symbol, hiding the | |
6977 | old indirect symbol. Also used for copying flags to a weakdef. */ | |
6978 | ||
6979 | void | |
6980 | _bfd_elf_link_hash_copy_indirect (struct bfd_link_info *info, | |
6981 | struct elf_link_hash_entry *dir, | |
6982 | struct elf_link_hash_entry *ind) | |
6983 | { | |
6984 | struct elf_link_hash_table *htab; | |
6985 | ||
6986 | /* Copy down any references that we may have already seen to the | |
6e33951e L |
6987 | symbol which just became indirect if DIR isn't a hidden versioned |
6988 | symbol. */ | |
4d269e42 | 6989 | |
422f1182 | 6990 | if (dir->versioned != versioned_hidden) |
6e33951e L |
6991 | { |
6992 | dir->ref_dynamic |= ind->ref_dynamic; | |
6993 | dir->ref_regular |= ind->ref_regular; | |
6994 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
6995 | dir->non_got_ref |= ind->non_got_ref; | |
6996 | dir->needs_plt |= ind->needs_plt; | |
6997 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
6998 | } | |
4d269e42 AM |
6999 | |
7000 | if (ind->root.type != bfd_link_hash_indirect) | |
7001 | return; | |
7002 | ||
7003 | /* Copy over the global and procedure linkage table refcount entries. | |
7004 | These may have been already set up by a check_relocs routine. */ | |
7005 | htab = elf_hash_table (info); | |
7006 | if (ind->got.refcount > htab->init_got_refcount.refcount) | |
7007 | { | |
7008 | if (dir->got.refcount < 0) | |
7009 | dir->got.refcount = 0; | |
7010 | dir->got.refcount += ind->got.refcount; | |
7011 | ind->got.refcount = htab->init_got_refcount.refcount; | |
7012 | } | |
7013 | ||
7014 | if (ind->plt.refcount > htab->init_plt_refcount.refcount) | |
7015 | { | |
7016 | if (dir->plt.refcount < 0) | |
7017 | dir->plt.refcount = 0; | |
7018 | dir->plt.refcount += ind->plt.refcount; | |
7019 | ind->plt.refcount = htab->init_plt_refcount.refcount; | |
7020 | } | |
7021 | ||
7022 | if (ind->dynindx != -1) | |
7023 | { | |
7024 | if (dir->dynindx != -1) | |
7025 | _bfd_elf_strtab_delref (htab->dynstr, dir->dynstr_index); | |
7026 | dir->dynindx = ind->dynindx; | |
7027 | dir->dynstr_index = ind->dynstr_index; | |
7028 | ind->dynindx = -1; | |
7029 | ind->dynstr_index = 0; | |
7030 | } | |
7031 | } | |
7032 | ||
7033 | void | |
7034 | _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info, | |
7035 | struct elf_link_hash_entry *h, | |
7036 | bfd_boolean force_local) | |
7037 | { | |
3aa14d16 L |
7038 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
7039 | if (h->type != STT_GNU_IFUNC) | |
7040 | { | |
7041 | h->plt = elf_hash_table (info)->init_plt_offset; | |
7042 | h->needs_plt = 0; | |
7043 | } | |
4d269e42 AM |
7044 | if (force_local) |
7045 | { | |
7046 | h->forced_local = 1; | |
7047 | if (h->dynindx != -1) | |
7048 | { | |
7049 | h->dynindx = -1; | |
7050 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
7051 | h->dynstr_index); | |
7052 | } | |
7053 | } | |
7054 | } | |
7055 | ||
7bf52ea2 AM |
7056 | /* Initialize an ELF linker hash table. *TABLE has been zeroed by our |
7057 | caller. */ | |
4d269e42 AM |
7058 | |
7059 | bfd_boolean | |
7060 | _bfd_elf_link_hash_table_init | |
7061 | (struct elf_link_hash_table *table, | |
7062 | bfd *abfd, | |
7063 | struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *, | |
7064 | struct bfd_hash_table *, | |
7065 | const char *), | |
4dfe6ac6 NC |
7066 | unsigned int entsize, |
7067 | enum elf_target_id target_id) | |
4d269e42 AM |
7068 | { |
7069 | bfd_boolean ret; | |
7070 | int can_refcount = get_elf_backend_data (abfd)->can_refcount; | |
7071 | ||
4d269e42 AM |
7072 | table->init_got_refcount.refcount = can_refcount - 1; |
7073 | table->init_plt_refcount.refcount = can_refcount - 1; | |
7074 | table->init_got_offset.offset = -(bfd_vma) 1; | |
7075 | table->init_plt_offset.offset = -(bfd_vma) 1; | |
7076 | /* The first dynamic symbol is a dummy. */ | |
7077 | table->dynsymcount = 1; | |
7078 | ||
7079 | ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); | |
4dfe6ac6 | 7080 | |
4d269e42 | 7081 | table->root.type = bfd_link_elf_hash_table; |
4dfe6ac6 | 7082 | table->hash_table_id = target_id; |
4d269e42 AM |
7083 | |
7084 | return ret; | |
7085 | } | |
7086 | ||
7087 | /* Create an ELF linker hash table. */ | |
7088 | ||
7089 | struct bfd_link_hash_table * | |
7090 | _bfd_elf_link_hash_table_create (bfd *abfd) | |
7091 | { | |
7092 | struct elf_link_hash_table *ret; | |
7093 | bfd_size_type amt = sizeof (struct elf_link_hash_table); | |
7094 | ||
7bf52ea2 | 7095 | ret = (struct elf_link_hash_table *) bfd_zmalloc (amt); |
4d269e42 AM |
7096 | if (ret == NULL) |
7097 | return NULL; | |
7098 | ||
7099 | if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc, | |
4dfe6ac6 NC |
7100 | sizeof (struct elf_link_hash_entry), |
7101 | GENERIC_ELF_DATA)) | |
4d269e42 AM |
7102 | { |
7103 | free (ret); | |
7104 | return NULL; | |
7105 | } | |
d495ab0d | 7106 | ret->root.hash_table_free = _bfd_elf_link_hash_table_free; |
4d269e42 AM |
7107 | |
7108 | return &ret->root; | |
7109 | } | |
7110 | ||
9f7c3e5e AM |
7111 | /* Destroy an ELF linker hash table. */ |
7112 | ||
7113 | void | |
d495ab0d | 7114 | _bfd_elf_link_hash_table_free (bfd *obfd) |
9f7c3e5e | 7115 | { |
d495ab0d AM |
7116 | struct elf_link_hash_table *htab; |
7117 | ||
7118 | htab = (struct elf_link_hash_table *) obfd->link.hash; | |
9f7c3e5e AM |
7119 | if (htab->dynstr != NULL) |
7120 | _bfd_elf_strtab_free (htab->dynstr); | |
7121 | _bfd_merge_sections_free (htab->merge_info); | |
d495ab0d | 7122 | _bfd_generic_link_hash_table_free (obfd); |
9f7c3e5e AM |
7123 | } |
7124 | ||
4d269e42 AM |
7125 | /* This is a hook for the ELF emulation code in the generic linker to |
7126 | tell the backend linker what file name to use for the DT_NEEDED | |
7127 | entry for a dynamic object. */ | |
7128 | ||
7129 | void | |
7130 | bfd_elf_set_dt_needed_name (bfd *abfd, const char *name) | |
7131 | { | |
7132 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7133 | && bfd_get_format (abfd) == bfd_object) | |
7134 | elf_dt_name (abfd) = name; | |
7135 | } | |
7136 | ||
7137 | int | |
7138 | bfd_elf_get_dyn_lib_class (bfd *abfd) | |
7139 | { | |
7140 | int lib_class; | |
7141 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7142 | && bfd_get_format (abfd) == bfd_object) | |
7143 | lib_class = elf_dyn_lib_class (abfd); | |
7144 | else | |
7145 | lib_class = 0; | |
7146 | return lib_class; | |
7147 | } | |
7148 | ||
7149 | void | |
7150 | bfd_elf_set_dyn_lib_class (bfd *abfd, enum dynamic_lib_link_class lib_class) | |
7151 | { | |
7152 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7153 | && bfd_get_format (abfd) == bfd_object) | |
7154 | elf_dyn_lib_class (abfd) = lib_class; | |
7155 | } | |
7156 | ||
7157 | /* Get the list of DT_NEEDED entries for a link. This is a hook for | |
7158 | the linker ELF emulation code. */ | |
7159 | ||
7160 | struct bfd_link_needed_list * | |
7161 | bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED, | |
7162 | struct bfd_link_info *info) | |
7163 | { | |
7164 | if (! is_elf_hash_table (info->hash)) | |
7165 | return NULL; | |
7166 | return elf_hash_table (info)->needed; | |
7167 | } | |
7168 | ||
7169 | /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a | |
7170 | hook for the linker ELF emulation code. */ | |
7171 | ||
7172 | struct bfd_link_needed_list * | |
7173 | bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED, | |
7174 | struct bfd_link_info *info) | |
7175 | { | |
7176 | if (! is_elf_hash_table (info->hash)) | |
7177 | return NULL; | |
7178 | return elf_hash_table (info)->runpath; | |
7179 | } | |
7180 | ||
7181 | /* Get the name actually used for a dynamic object for a link. This | |
7182 | is the SONAME entry if there is one. Otherwise, it is the string | |
7183 | passed to bfd_elf_set_dt_needed_name, or it is the filename. */ | |
7184 | ||
7185 | const char * | |
7186 | bfd_elf_get_dt_soname (bfd *abfd) | |
7187 | { | |
7188 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7189 | && bfd_get_format (abfd) == bfd_object) | |
7190 | return elf_dt_name (abfd); | |
7191 | return NULL; | |
7192 | } | |
7193 | ||
7194 | /* Get the list of DT_NEEDED entries from a BFD. This is a hook for | |
7195 | the ELF linker emulation code. */ | |
7196 | ||
7197 | bfd_boolean | |
7198 | bfd_elf_get_bfd_needed_list (bfd *abfd, | |
7199 | struct bfd_link_needed_list **pneeded) | |
7200 | { | |
7201 | asection *s; | |
7202 | bfd_byte *dynbuf = NULL; | |
cb33740c | 7203 | unsigned int elfsec; |
4d269e42 AM |
7204 | unsigned long shlink; |
7205 | bfd_byte *extdyn, *extdynend; | |
7206 | size_t extdynsize; | |
7207 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
7208 | ||
7209 | *pneeded = NULL; | |
7210 | ||
7211 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour | |
7212 | || bfd_get_format (abfd) != bfd_object) | |
7213 | return TRUE; | |
7214 | ||
7215 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
7216 | if (s == NULL || s->size == 0) | |
7217 | return TRUE; | |
7218 | ||
7219 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) | |
7220 | goto error_return; | |
7221 | ||
7222 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 7223 | if (elfsec == SHN_BAD) |
4d269e42 AM |
7224 | goto error_return; |
7225 | ||
7226 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
c152c796 | 7227 | |
4d269e42 AM |
7228 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
7229 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
7230 | ||
7231 | extdyn = dynbuf; | |
7232 | extdynend = extdyn + s->size; | |
7233 | for (; extdyn < extdynend; extdyn += extdynsize) | |
7234 | { | |
7235 | Elf_Internal_Dyn dyn; | |
7236 | ||
7237 | (*swap_dyn_in) (abfd, extdyn, &dyn); | |
7238 | ||
7239 | if (dyn.d_tag == DT_NULL) | |
7240 | break; | |
7241 | ||
7242 | if (dyn.d_tag == DT_NEEDED) | |
7243 | { | |
7244 | const char *string; | |
7245 | struct bfd_link_needed_list *l; | |
7246 | unsigned int tagv = dyn.d_un.d_val; | |
7247 | bfd_size_type amt; | |
7248 | ||
7249 | string = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
7250 | if (string == NULL) | |
7251 | goto error_return; | |
7252 | ||
7253 | amt = sizeof *l; | |
a50b1753 | 7254 | l = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4d269e42 AM |
7255 | if (l == NULL) |
7256 | goto error_return; | |
7257 | ||
7258 | l->by = abfd; | |
7259 | l->name = string; | |
7260 | l->next = *pneeded; | |
7261 | *pneeded = l; | |
7262 | } | |
7263 | } | |
7264 | ||
7265 | free (dynbuf); | |
7266 | ||
7267 | return TRUE; | |
7268 | ||
7269 | error_return: | |
7270 | if (dynbuf != NULL) | |
7271 | free (dynbuf); | |
7272 | return FALSE; | |
7273 | } | |
7274 | ||
7275 | struct elf_symbuf_symbol | |
7276 | { | |
7277 | unsigned long st_name; /* Symbol name, index in string tbl */ | |
7278 | unsigned char st_info; /* Type and binding attributes */ | |
7279 | unsigned char st_other; /* Visibilty, and target specific */ | |
7280 | }; | |
7281 | ||
7282 | struct elf_symbuf_head | |
7283 | { | |
7284 | struct elf_symbuf_symbol *ssym; | |
7285 | bfd_size_type count; | |
7286 | unsigned int st_shndx; | |
7287 | }; | |
7288 | ||
7289 | struct elf_symbol | |
7290 | { | |
7291 | union | |
7292 | { | |
7293 | Elf_Internal_Sym *isym; | |
7294 | struct elf_symbuf_symbol *ssym; | |
7295 | } u; | |
7296 | const char *name; | |
7297 | }; | |
7298 | ||
7299 | /* Sort references to symbols by ascending section number. */ | |
7300 | ||
7301 | static int | |
7302 | elf_sort_elf_symbol (const void *arg1, const void *arg2) | |
7303 | { | |
7304 | const Elf_Internal_Sym *s1 = *(const Elf_Internal_Sym **) arg1; | |
7305 | const Elf_Internal_Sym *s2 = *(const Elf_Internal_Sym **) arg2; | |
7306 | ||
7307 | return s1->st_shndx - s2->st_shndx; | |
7308 | } | |
7309 | ||
7310 | static int | |
7311 | elf_sym_name_compare (const void *arg1, const void *arg2) | |
7312 | { | |
7313 | const struct elf_symbol *s1 = (const struct elf_symbol *) arg1; | |
7314 | const struct elf_symbol *s2 = (const struct elf_symbol *) arg2; | |
7315 | return strcmp (s1->name, s2->name); | |
7316 | } | |
7317 | ||
7318 | static struct elf_symbuf_head * | |
7319 | elf_create_symbuf (bfd_size_type symcount, Elf_Internal_Sym *isymbuf) | |
7320 | { | |
14b1c01e | 7321 | Elf_Internal_Sym **ind, **indbufend, **indbuf; |
4d269e42 AM |
7322 | struct elf_symbuf_symbol *ssym; |
7323 | struct elf_symbuf_head *ssymbuf, *ssymhead; | |
3ae181ee | 7324 | bfd_size_type i, shndx_count, total_size; |
4d269e42 | 7325 | |
a50b1753 | 7326 | indbuf = (Elf_Internal_Sym **) bfd_malloc2 (symcount, sizeof (*indbuf)); |
4d269e42 AM |
7327 | if (indbuf == NULL) |
7328 | return NULL; | |
7329 | ||
7330 | for (ind = indbuf, i = 0; i < symcount; i++) | |
7331 | if (isymbuf[i].st_shndx != SHN_UNDEF) | |
7332 | *ind++ = &isymbuf[i]; | |
7333 | indbufend = ind; | |
7334 | ||
7335 | qsort (indbuf, indbufend - indbuf, sizeof (Elf_Internal_Sym *), | |
7336 | elf_sort_elf_symbol); | |
7337 | ||
7338 | shndx_count = 0; | |
7339 | if (indbufend > indbuf) | |
7340 | for (ind = indbuf, shndx_count++; ind < indbufend - 1; ind++) | |
7341 | if (ind[0]->st_shndx != ind[1]->st_shndx) | |
7342 | shndx_count++; | |
7343 | ||
3ae181ee L |
7344 | total_size = ((shndx_count + 1) * sizeof (*ssymbuf) |
7345 | + (indbufend - indbuf) * sizeof (*ssym)); | |
a50b1753 | 7346 | ssymbuf = (struct elf_symbuf_head *) bfd_malloc (total_size); |
4d269e42 AM |
7347 | if (ssymbuf == NULL) |
7348 | { | |
7349 | free (indbuf); | |
7350 | return NULL; | |
7351 | } | |
7352 | ||
3ae181ee | 7353 | ssym = (struct elf_symbuf_symbol *) (ssymbuf + shndx_count + 1); |
4d269e42 AM |
7354 | ssymbuf->ssym = NULL; |
7355 | ssymbuf->count = shndx_count; | |
7356 | ssymbuf->st_shndx = 0; | |
7357 | for (ssymhead = ssymbuf, ind = indbuf; ind < indbufend; ssym++, ind++) | |
7358 | { | |
7359 | if (ind == indbuf || ssymhead->st_shndx != (*ind)->st_shndx) | |
7360 | { | |
7361 | ssymhead++; | |
7362 | ssymhead->ssym = ssym; | |
7363 | ssymhead->count = 0; | |
7364 | ssymhead->st_shndx = (*ind)->st_shndx; | |
7365 | } | |
7366 | ssym->st_name = (*ind)->st_name; | |
7367 | ssym->st_info = (*ind)->st_info; | |
7368 | ssym->st_other = (*ind)->st_other; | |
7369 | ssymhead->count++; | |
7370 | } | |
3ae181ee L |
7371 | BFD_ASSERT ((bfd_size_type) (ssymhead - ssymbuf) == shndx_count |
7372 | && (((bfd_hostptr_t) ssym - (bfd_hostptr_t) ssymbuf) | |
7373 | == total_size)); | |
4d269e42 AM |
7374 | |
7375 | free (indbuf); | |
7376 | return ssymbuf; | |
7377 | } | |
7378 | ||
7379 | /* Check if 2 sections define the same set of local and global | |
7380 | symbols. */ | |
7381 | ||
8f317e31 | 7382 | static bfd_boolean |
4d269e42 AM |
7383 | bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2, |
7384 | struct bfd_link_info *info) | |
7385 | { | |
7386 | bfd *bfd1, *bfd2; | |
7387 | const struct elf_backend_data *bed1, *bed2; | |
7388 | Elf_Internal_Shdr *hdr1, *hdr2; | |
7389 | bfd_size_type symcount1, symcount2; | |
7390 | Elf_Internal_Sym *isymbuf1, *isymbuf2; | |
7391 | struct elf_symbuf_head *ssymbuf1, *ssymbuf2; | |
7392 | Elf_Internal_Sym *isym, *isymend; | |
7393 | struct elf_symbol *symtable1 = NULL, *symtable2 = NULL; | |
7394 | bfd_size_type count1, count2, i; | |
cb33740c | 7395 | unsigned int shndx1, shndx2; |
4d269e42 AM |
7396 | bfd_boolean result; |
7397 | ||
7398 | bfd1 = sec1->owner; | |
7399 | bfd2 = sec2->owner; | |
7400 | ||
4d269e42 AM |
7401 | /* Both sections have to be in ELF. */ |
7402 | if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour | |
7403 | || bfd_get_flavour (bfd2) != bfd_target_elf_flavour) | |
7404 | return FALSE; | |
7405 | ||
7406 | if (elf_section_type (sec1) != elf_section_type (sec2)) | |
7407 | return FALSE; | |
7408 | ||
4d269e42 AM |
7409 | shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1); |
7410 | shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2); | |
cb33740c | 7411 | if (shndx1 == SHN_BAD || shndx2 == SHN_BAD) |
4d269e42 AM |
7412 | return FALSE; |
7413 | ||
7414 | bed1 = get_elf_backend_data (bfd1); | |
7415 | bed2 = get_elf_backend_data (bfd2); | |
7416 | hdr1 = &elf_tdata (bfd1)->symtab_hdr; | |
7417 | symcount1 = hdr1->sh_size / bed1->s->sizeof_sym; | |
7418 | hdr2 = &elf_tdata (bfd2)->symtab_hdr; | |
7419 | symcount2 = hdr2->sh_size / bed2->s->sizeof_sym; | |
7420 | ||
7421 | if (symcount1 == 0 || symcount2 == 0) | |
7422 | return FALSE; | |
7423 | ||
7424 | result = FALSE; | |
7425 | isymbuf1 = NULL; | |
7426 | isymbuf2 = NULL; | |
a50b1753 NC |
7427 | ssymbuf1 = (struct elf_symbuf_head *) elf_tdata (bfd1)->symbuf; |
7428 | ssymbuf2 = (struct elf_symbuf_head *) elf_tdata (bfd2)->symbuf; | |
4d269e42 AM |
7429 | |
7430 | if (ssymbuf1 == NULL) | |
7431 | { | |
7432 | isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0, | |
7433 | NULL, NULL, NULL); | |
7434 | if (isymbuf1 == NULL) | |
7435 | goto done; | |
7436 | ||
7437 | if (!info->reduce_memory_overheads) | |
7438 | elf_tdata (bfd1)->symbuf = ssymbuf1 | |
7439 | = elf_create_symbuf (symcount1, isymbuf1); | |
7440 | } | |
7441 | ||
7442 | if (ssymbuf1 == NULL || ssymbuf2 == NULL) | |
7443 | { | |
7444 | isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0, | |
7445 | NULL, NULL, NULL); | |
7446 | if (isymbuf2 == NULL) | |
7447 | goto done; | |
7448 | ||
7449 | if (ssymbuf1 != NULL && !info->reduce_memory_overheads) | |
7450 | elf_tdata (bfd2)->symbuf = ssymbuf2 | |
7451 | = elf_create_symbuf (symcount2, isymbuf2); | |
7452 | } | |
7453 | ||
7454 | if (ssymbuf1 != NULL && ssymbuf2 != NULL) | |
7455 | { | |
7456 | /* Optimized faster version. */ | |
7457 | bfd_size_type lo, hi, mid; | |
7458 | struct elf_symbol *symp; | |
7459 | struct elf_symbuf_symbol *ssym, *ssymend; | |
7460 | ||
7461 | lo = 0; | |
7462 | hi = ssymbuf1->count; | |
7463 | ssymbuf1++; | |
7464 | count1 = 0; | |
7465 | while (lo < hi) | |
7466 | { | |
7467 | mid = (lo + hi) / 2; | |
cb33740c | 7468 | if (shndx1 < ssymbuf1[mid].st_shndx) |
4d269e42 | 7469 | hi = mid; |
cb33740c | 7470 | else if (shndx1 > ssymbuf1[mid].st_shndx) |
4d269e42 AM |
7471 | lo = mid + 1; |
7472 | else | |
7473 | { | |
7474 | count1 = ssymbuf1[mid].count; | |
7475 | ssymbuf1 += mid; | |
7476 | break; | |
7477 | } | |
7478 | } | |
7479 | ||
7480 | lo = 0; | |
7481 | hi = ssymbuf2->count; | |
7482 | ssymbuf2++; | |
7483 | count2 = 0; | |
7484 | while (lo < hi) | |
7485 | { | |
7486 | mid = (lo + hi) / 2; | |
cb33740c | 7487 | if (shndx2 < ssymbuf2[mid].st_shndx) |
4d269e42 | 7488 | hi = mid; |
cb33740c | 7489 | else if (shndx2 > ssymbuf2[mid].st_shndx) |
4d269e42 AM |
7490 | lo = mid + 1; |
7491 | else | |
7492 | { | |
7493 | count2 = ssymbuf2[mid].count; | |
7494 | ssymbuf2 += mid; | |
7495 | break; | |
7496 | } | |
7497 | } | |
7498 | ||
7499 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
7500 | goto done; | |
7501 | ||
ca4be51c AM |
7502 | symtable1 |
7503 | = (struct elf_symbol *) bfd_malloc (count1 * sizeof (*symtable1)); | |
7504 | symtable2 | |
7505 | = (struct elf_symbol *) bfd_malloc (count2 * sizeof (*symtable2)); | |
4d269e42 AM |
7506 | if (symtable1 == NULL || symtable2 == NULL) |
7507 | goto done; | |
7508 | ||
7509 | symp = symtable1; | |
7510 | for (ssym = ssymbuf1->ssym, ssymend = ssym + count1; | |
7511 | ssym < ssymend; ssym++, symp++) | |
7512 | { | |
7513 | symp->u.ssym = ssym; | |
7514 | symp->name = bfd_elf_string_from_elf_section (bfd1, | |
7515 | hdr1->sh_link, | |
7516 | ssym->st_name); | |
7517 | } | |
7518 | ||
7519 | symp = symtable2; | |
7520 | for (ssym = ssymbuf2->ssym, ssymend = ssym + count2; | |
7521 | ssym < ssymend; ssym++, symp++) | |
7522 | { | |
7523 | symp->u.ssym = ssym; | |
7524 | symp->name = bfd_elf_string_from_elf_section (bfd2, | |
7525 | hdr2->sh_link, | |
7526 | ssym->st_name); | |
7527 | } | |
7528 | ||
7529 | /* Sort symbol by name. */ | |
7530 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
7531 | elf_sym_name_compare); | |
7532 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
7533 | elf_sym_name_compare); | |
7534 | ||
7535 | for (i = 0; i < count1; i++) | |
7536 | /* Two symbols must have the same binding, type and name. */ | |
7537 | if (symtable1 [i].u.ssym->st_info != symtable2 [i].u.ssym->st_info | |
7538 | || symtable1 [i].u.ssym->st_other != symtable2 [i].u.ssym->st_other | |
7539 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
7540 | goto done; | |
7541 | ||
7542 | result = TRUE; | |
7543 | goto done; | |
7544 | } | |
7545 | ||
a50b1753 NC |
7546 | symtable1 = (struct elf_symbol *) |
7547 | bfd_malloc (symcount1 * sizeof (struct elf_symbol)); | |
7548 | symtable2 = (struct elf_symbol *) | |
7549 | bfd_malloc (symcount2 * sizeof (struct elf_symbol)); | |
4d269e42 AM |
7550 | if (symtable1 == NULL || symtable2 == NULL) |
7551 | goto done; | |
7552 | ||
7553 | /* Count definitions in the section. */ | |
7554 | count1 = 0; | |
7555 | for (isym = isymbuf1, isymend = isym + symcount1; isym < isymend; isym++) | |
cb33740c | 7556 | if (isym->st_shndx == shndx1) |
4d269e42 AM |
7557 | symtable1[count1++].u.isym = isym; |
7558 | ||
7559 | count2 = 0; | |
7560 | for (isym = isymbuf2, isymend = isym + symcount2; isym < isymend; isym++) | |
cb33740c | 7561 | if (isym->st_shndx == shndx2) |
4d269e42 AM |
7562 | symtable2[count2++].u.isym = isym; |
7563 | ||
7564 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
7565 | goto done; | |
7566 | ||
7567 | for (i = 0; i < count1; i++) | |
7568 | symtable1[i].name | |
7569 | = bfd_elf_string_from_elf_section (bfd1, hdr1->sh_link, | |
7570 | symtable1[i].u.isym->st_name); | |
7571 | ||
7572 | for (i = 0; i < count2; i++) | |
7573 | symtable2[i].name | |
7574 | = bfd_elf_string_from_elf_section (bfd2, hdr2->sh_link, | |
7575 | symtable2[i].u.isym->st_name); | |
7576 | ||
7577 | /* Sort symbol by name. */ | |
7578 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
7579 | elf_sym_name_compare); | |
7580 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
7581 | elf_sym_name_compare); | |
7582 | ||
7583 | for (i = 0; i < count1; i++) | |
7584 | /* Two symbols must have the same binding, type and name. */ | |
7585 | if (symtable1 [i].u.isym->st_info != symtable2 [i].u.isym->st_info | |
7586 | || symtable1 [i].u.isym->st_other != symtable2 [i].u.isym->st_other | |
7587 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
7588 | goto done; | |
7589 | ||
7590 | result = TRUE; | |
7591 | ||
7592 | done: | |
7593 | if (symtable1) | |
7594 | free (symtable1); | |
7595 | if (symtable2) | |
7596 | free (symtable2); | |
7597 | if (isymbuf1) | |
7598 | free (isymbuf1); | |
7599 | if (isymbuf2) | |
7600 | free (isymbuf2); | |
7601 | ||
7602 | return result; | |
7603 | } | |
7604 | ||
7605 | /* Return TRUE if 2 section types are compatible. */ | |
7606 | ||
7607 | bfd_boolean | |
7608 | _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec, | |
7609 | bfd *bbfd, const asection *bsec) | |
7610 | { | |
7611 | if (asec == NULL | |
7612 | || bsec == NULL | |
7613 | || abfd->xvec->flavour != bfd_target_elf_flavour | |
7614 | || bbfd->xvec->flavour != bfd_target_elf_flavour) | |
7615 | return TRUE; | |
7616 | ||
7617 | return elf_section_type (asec) == elf_section_type (bsec); | |
7618 | } | |
7619 | \f | |
c152c796 AM |
7620 | /* Final phase of ELF linker. */ |
7621 | ||
7622 | /* A structure we use to avoid passing large numbers of arguments. */ | |
7623 | ||
7624 | struct elf_final_link_info | |
7625 | { | |
7626 | /* General link information. */ | |
7627 | struct bfd_link_info *info; | |
7628 | /* Output BFD. */ | |
7629 | bfd *output_bfd; | |
7630 | /* Symbol string table. */ | |
ef10c3ac | 7631 | struct elf_strtab_hash *symstrtab; |
c152c796 AM |
7632 | /* .hash section. */ |
7633 | asection *hash_sec; | |
7634 | /* symbol version section (.gnu.version). */ | |
7635 | asection *symver_sec; | |
7636 | /* Buffer large enough to hold contents of any section. */ | |
7637 | bfd_byte *contents; | |
7638 | /* Buffer large enough to hold external relocs of any section. */ | |
7639 | void *external_relocs; | |
7640 | /* Buffer large enough to hold internal relocs of any section. */ | |
7641 | Elf_Internal_Rela *internal_relocs; | |
7642 | /* Buffer large enough to hold external local symbols of any input | |
7643 | BFD. */ | |
7644 | bfd_byte *external_syms; | |
7645 | /* And a buffer for symbol section indices. */ | |
7646 | Elf_External_Sym_Shndx *locsym_shndx; | |
7647 | /* Buffer large enough to hold internal local symbols of any input | |
7648 | BFD. */ | |
7649 | Elf_Internal_Sym *internal_syms; | |
7650 | /* Array large enough to hold a symbol index for each local symbol | |
7651 | of any input BFD. */ | |
7652 | long *indices; | |
7653 | /* Array large enough to hold a section pointer for each local | |
7654 | symbol of any input BFD. */ | |
7655 | asection **sections; | |
ef10c3ac | 7656 | /* Buffer for SHT_SYMTAB_SHNDX section. */ |
c152c796 | 7657 | Elf_External_Sym_Shndx *symshndxbuf; |
ffbc01cc AM |
7658 | /* Number of STT_FILE syms seen. */ |
7659 | size_t filesym_count; | |
c152c796 AM |
7660 | }; |
7661 | ||
7662 | /* This struct is used to pass information to elf_link_output_extsym. */ | |
7663 | ||
7664 | struct elf_outext_info | |
7665 | { | |
7666 | bfd_boolean failed; | |
7667 | bfd_boolean localsyms; | |
34a79995 | 7668 | bfd_boolean file_sym_done; |
8b127cbc | 7669 | struct elf_final_link_info *flinfo; |
c152c796 AM |
7670 | }; |
7671 | ||
d9352518 DB |
7672 | |
7673 | /* Support for evaluating a complex relocation. | |
7674 | ||
7675 | Complex relocations are generalized, self-describing relocations. The | |
7676 | implementation of them consists of two parts: complex symbols, and the | |
a0c8462f | 7677 | relocations themselves. |
d9352518 DB |
7678 | |
7679 | The relocations are use a reserved elf-wide relocation type code (R_RELC | |
7680 | external / BFD_RELOC_RELC internal) and an encoding of relocation field | |
7681 | information (start bit, end bit, word width, etc) into the addend. This | |
7682 | information is extracted from CGEN-generated operand tables within gas. | |
7683 | ||
7684 | Complex symbols are mangled symbols (BSF_RELC external / STT_RELC | |
7685 | internal) representing prefix-notation expressions, including but not | |
7686 | limited to those sorts of expressions normally encoded as addends in the | |
7687 | addend field. The symbol mangling format is: | |
7688 | ||
7689 | <node> := <literal> | |
7690 | | <unary-operator> ':' <node> | |
7691 | | <binary-operator> ':' <node> ':' <node> | |
7692 | ; | |
7693 | ||
7694 | <literal> := 's' <digits=N> ':' <N character symbol name> | |
7695 | | 'S' <digits=N> ':' <N character section name> | |
7696 | | '#' <hexdigits> | |
7697 | ; | |
7698 | ||
7699 | <binary-operator> := as in C | |
7700 | <unary-operator> := as in C, plus "0-" for unambiguous negation. */ | |
7701 | ||
7702 | static void | |
a0c8462f AM |
7703 | set_symbol_value (bfd *bfd_with_globals, |
7704 | Elf_Internal_Sym *isymbuf, | |
7705 | size_t locsymcount, | |
7706 | size_t symidx, | |
7707 | bfd_vma val) | |
d9352518 | 7708 | { |
8977835c AM |
7709 | struct elf_link_hash_entry **sym_hashes; |
7710 | struct elf_link_hash_entry *h; | |
7711 | size_t extsymoff = locsymcount; | |
d9352518 | 7712 | |
8977835c | 7713 | if (symidx < locsymcount) |
d9352518 | 7714 | { |
8977835c AM |
7715 | Elf_Internal_Sym *sym; |
7716 | ||
7717 | sym = isymbuf + symidx; | |
7718 | if (ELF_ST_BIND (sym->st_info) == STB_LOCAL) | |
7719 | { | |
7720 | /* It is a local symbol: move it to the | |
7721 | "absolute" section and give it a value. */ | |
7722 | sym->st_shndx = SHN_ABS; | |
7723 | sym->st_value = val; | |
7724 | return; | |
7725 | } | |
7726 | BFD_ASSERT (elf_bad_symtab (bfd_with_globals)); | |
7727 | extsymoff = 0; | |
d9352518 | 7728 | } |
8977835c AM |
7729 | |
7730 | /* It is a global symbol: set its link type | |
7731 | to "defined" and give it a value. */ | |
7732 | ||
7733 | sym_hashes = elf_sym_hashes (bfd_with_globals); | |
7734 | h = sym_hashes [symidx - extsymoff]; | |
7735 | while (h->root.type == bfd_link_hash_indirect | |
7736 | || h->root.type == bfd_link_hash_warning) | |
7737 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7738 | h->root.type = bfd_link_hash_defined; | |
7739 | h->root.u.def.value = val; | |
7740 | h->root.u.def.section = bfd_abs_section_ptr; | |
d9352518 DB |
7741 | } |
7742 | ||
a0c8462f AM |
7743 | static bfd_boolean |
7744 | resolve_symbol (const char *name, | |
7745 | bfd *input_bfd, | |
8b127cbc | 7746 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
7747 | bfd_vma *result, |
7748 | Elf_Internal_Sym *isymbuf, | |
7749 | size_t locsymcount) | |
d9352518 | 7750 | { |
a0c8462f AM |
7751 | Elf_Internal_Sym *sym; |
7752 | struct bfd_link_hash_entry *global_entry; | |
7753 | const char *candidate = NULL; | |
7754 | Elf_Internal_Shdr *symtab_hdr; | |
7755 | size_t i; | |
7756 | ||
d9352518 DB |
7757 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
7758 | ||
7759 | for (i = 0; i < locsymcount; ++ i) | |
7760 | { | |
8977835c | 7761 | sym = isymbuf + i; |
d9352518 DB |
7762 | |
7763 | if (ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
7764 | continue; | |
7765 | ||
7766 | candidate = bfd_elf_string_from_elf_section (input_bfd, | |
7767 | symtab_hdr->sh_link, | |
7768 | sym->st_name); | |
7769 | #ifdef DEBUG | |
0f02bbd9 AM |
7770 | printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n", |
7771 | name, candidate, (unsigned long) sym->st_value); | |
d9352518 DB |
7772 | #endif |
7773 | if (candidate && strcmp (candidate, name) == 0) | |
7774 | { | |
8b127cbc | 7775 | asection *sec = flinfo->sections [i]; |
d9352518 | 7776 | |
0f02bbd9 AM |
7777 | *result = _bfd_elf_rel_local_sym (input_bfd, sym, &sec, 0); |
7778 | *result += sec->output_offset + sec->output_section->vma; | |
d9352518 | 7779 | #ifdef DEBUG |
0f02bbd9 AM |
7780 | printf ("Found symbol with value %8.8lx\n", |
7781 | (unsigned long) *result); | |
d9352518 DB |
7782 | #endif |
7783 | return TRUE; | |
7784 | } | |
7785 | } | |
7786 | ||
7787 | /* Hmm, haven't found it yet. perhaps it is a global. */ | |
8b127cbc | 7788 | global_entry = bfd_link_hash_lookup (flinfo->info->hash, name, |
a0c8462f | 7789 | FALSE, FALSE, TRUE); |
d9352518 DB |
7790 | if (!global_entry) |
7791 | return FALSE; | |
a0c8462f | 7792 | |
d9352518 DB |
7793 | if (global_entry->type == bfd_link_hash_defined |
7794 | || global_entry->type == bfd_link_hash_defweak) | |
7795 | { | |
a0c8462f AM |
7796 | *result = (global_entry->u.def.value |
7797 | + global_entry->u.def.section->output_section->vma | |
7798 | + global_entry->u.def.section->output_offset); | |
d9352518 | 7799 | #ifdef DEBUG |
0f02bbd9 AM |
7800 | printf ("Found GLOBAL symbol '%s' with value %8.8lx\n", |
7801 | global_entry->root.string, (unsigned long) *result); | |
d9352518 DB |
7802 | #endif |
7803 | return TRUE; | |
a0c8462f | 7804 | } |
d9352518 | 7805 | |
d9352518 DB |
7806 | return FALSE; |
7807 | } | |
7808 | ||
37b01f6a DG |
7809 | /* Looks up NAME in SECTIONS. If found sets RESULT to NAME's address (in |
7810 | bytes) and returns TRUE, otherwise returns FALSE. Accepts pseudo-section | |
7811 | names like "foo.end" which is the end address of section "foo". */ | |
7812 | ||
d9352518 | 7813 | static bfd_boolean |
a0c8462f AM |
7814 | resolve_section (const char *name, |
7815 | asection *sections, | |
37b01f6a DG |
7816 | bfd_vma *result, |
7817 | bfd * abfd) | |
d9352518 | 7818 | { |
a0c8462f AM |
7819 | asection *curr; |
7820 | unsigned int len; | |
d9352518 | 7821 | |
a0c8462f | 7822 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
7823 | if (strcmp (curr->name, name) == 0) |
7824 | { | |
7825 | *result = curr->vma; | |
7826 | return TRUE; | |
7827 | } | |
7828 | ||
7829 | /* Hmm. still haven't found it. try pseudo-section names. */ | |
37b01f6a | 7830 | /* FIXME: This could be coded more efficiently... */ |
a0c8462f | 7831 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
7832 | { |
7833 | len = strlen (curr->name); | |
a0c8462f | 7834 | if (len > strlen (name)) |
d9352518 DB |
7835 | continue; |
7836 | ||
7837 | if (strncmp (curr->name, name, len) == 0) | |
7838 | { | |
7839 | if (strncmp (".end", name + len, 4) == 0) | |
7840 | { | |
37b01f6a | 7841 | *result = curr->vma + curr->size / bfd_octets_per_byte (abfd); |
d9352518 DB |
7842 | return TRUE; |
7843 | } | |
7844 | ||
7845 | /* Insert more pseudo-section names here, if you like. */ | |
7846 | } | |
7847 | } | |
a0c8462f | 7848 | |
d9352518 DB |
7849 | return FALSE; |
7850 | } | |
7851 | ||
7852 | static void | |
a0c8462f | 7853 | undefined_reference (const char *reftype, const char *name) |
d9352518 | 7854 | { |
a0c8462f AM |
7855 | _bfd_error_handler (_("undefined %s reference in complex symbol: %s"), |
7856 | reftype, name); | |
d9352518 DB |
7857 | } |
7858 | ||
7859 | static bfd_boolean | |
a0c8462f AM |
7860 | eval_symbol (bfd_vma *result, |
7861 | const char **symp, | |
7862 | bfd *input_bfd, | |
8b127cbc | 7863 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
7864 | bfd_vma dot, |
7865 | Elf_Internal_Sym *isymbuf, | |
7866 | size_t locsymcount, | |
7867 | int signed_p) | |
d9352518 | 7868 | { |
4b93929b NC |
7869 | size_t len; |
7870 | size_t symlen; | |
a0c8462f AM |
7871 | bfd_vma a; |
7872 | bfd_vma b; | |
4b93929b | 7873 | char symbuf[4096]; |
0f02bbd9 | 7874 | const char *sym = *symp; |
a0c8462f AM |
7875 | const char *symend; |
7876 | bfd_boolean symbol_is_section = FALSE; | |
d9352518 DB |
7877 | |
7878 | len = strlen (sym); | |
7879 | symend = sym + len; | |
7880 | ||
4b93929b | 7881 | if (len < 1 || len > sizeof (symbuf)) |
d9352518 DB |
7882 | { |
7883 | bfd_set_error (bfd_error_invalid_operation); | |
7884 | return FALSE; | |
7885 | } | |
a0c8462f | 7886 | |
d9352518 DB |
7887 | switch (* sym) |
7888 | { | |
7889 | case '.': | |
0f02bbd9 AM |
7890 | *result = dot; |
7891 | *symp = sym + 1; | |
d9352518 DB |
7892 | return TRUE; |
7893 | ||
7894 | case '#': | |
0f02bbd9 AM |
7895 | ++sym; |
7896 | *result = strtoul (sym, (char **) symp, 16); | |
d9352518 DB |
7897 | return TRUE; |
7898 | ||
7899 | case 'S': | |
7900 | symbol_is_section = TRUE; | |
a0c8462f | 7901 | case 's': |
0f02bbd9 AM |
7902 | ++sym; |
7903 | symlen = strtol (sym, (char **) symp, 10); | |
7904 | sym = *symp + 1; /* Skip the trailing ':'. */ | |
d9352518 | 7905 | |
4b93929b | 7906 | if (symend < sym || symlen + 1 > sizeof (symbuf)) |
d9352518 DB |
7907 | { |
7908 | bfd_set_error (bfd_error_invalid_operation); | |
7909 | return FALSE; | |
7910 | } | |
7911 | ||
7912 | memcpy (symbuf, sym, symlen); | |
a0c8462f | 7913 | symbuf[symlen] = '\0'; |
0f02bbd9 | 7914 | *symp = sym + symlen; |
a0c8462f AM |
7915 | |
7916 | /* Is it always possible, with complex symbols, that gas "mis-guessed" | |
d9352518 DB |
7917 | the symbol as a section, or vice-versa. so we're pretty liberal in our |
7918 | interpretation here; section means "try section first", not "must be a | |
7919 | section", and likewise with symbol. */ | |
7920 | ||
a0c8462f | 7921 | if (symbol_is_section) |
d9352518 | 7922 | { |
37b01f6a | 7923 | if (!resolve_section (symbuf, flinfo->output_bfd->sections, result, input_bfd) |
8b127cbc | 7924 | && !resolve_symbol (symbuf, input_bfd, flinfo, result, |
8977835c | 7925 | isymbuf, locsymcount)) |
d9352518 DB |
7926 | { |
7927 | undefined_reference ("section", symbuf); | |
7928 | return FALSE; | |
7929 | } | |
a0c8462f AM |
7930 | } |
7931 | else | |
d9352518 | 7932 | { |
8b127cbc | 7933 | if (!resolve_symbol (symbuf, input_bfd, flinfo, result, |
8977835c | 7934 | isymbuf, locsymcount) |
8b127cbc | 7935 | && !resolve_section (symbuf, flinfo->output_bfd->sections, |
37b01f6a | 7936 | result, input_bfd)) |
d9352518 DB |
7937 | { |
7938 | undefined_reference ("symbol", symbuf); | |
7939 | return FALSE; | |
7940 | } | |
7941 | } | |
7942 | ||
7943 | return TRUE; | |
a0c8462f | 7944 | |
d9352518 DB |
7945 | /* All that remains are operators. */ |
7946 | ||
7947 | #define UNARY_OP(op) \ | |
7948 | if (strncmp (sym, #op, strlen (#op)) == 0) \ | |
7949 | { \ | |
7950 | sym += strlen (#op); \ | |
a0c8462f AM |
7951 | if (*sym == ':') \ |
7952 | ++sym; \ | |
0f02bbd9 | 7953 | *symp = sym; \ |
8b127cbc | 7954 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 7955 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f AM |
7956 | return FALSE; \ |
7957 | if (signed_p) \ | |
0f02bbd9 | 7958 | *result = op ((bfd_signed_vma) a); \ |
a0c8462f AM |
7959 | else \ |
7960 | *result = op a; \ | |
d9352518 DB |
7961 | return TRUE; \ |
7962 | } | |
7963 | ||
7964 | #define BINARY_OP(op) \ | |
7965 | if (strncmp (sym, #op, strlen (#op)) == 0) \ | |
7966 | { \ | |
7967 | sym += strlen (#op); \ | |
a0c8462f AM |
7968 | if (*sym == ':') \ |
7969 | ++sym; \ | |
0f02bbd9 | 7970 | *symp = sym; \ |
8b127cbc | 7971 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 7972 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f | 7973 | return FALSE; \ |
0f02bbd9 | 7974 | ++*symp; \ |
8b127cbc | 7975 | if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 7976 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f AM |
7977 | return FALSE; \ |
7978 | if (signed_p) \ | |
0f02bbd9 | 7979 | *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \ |
a0c8462f AM |
7980 | else \ |
7981 | *result = a op b; \ | |
d9352518 DB |
7982 | return TRUE; \ |
7983 | } | |
7984 | ||
7985 | default: | |
7986 | UNARY_OP (0-); | |
7987 | BINARY_OP (<<); | |
7988 | BINARY_OP (>>); | |
7989 | BINARY_OP (==); | |
7990 | BINARY_OP (!=); | |
7991 | BINARY_OP (<=); | |
7992 | BINARY_OP (>=); | |
7993 | BINARY_OP (&&); | |
7994 | BINARY_OP (||); | |
7995 | UNARY_OP (~); | |
7996 | UNARY_OP (!); | |
7997 | BINARY_OP (*); | |
7998 | BINARY_OP (/); | |
7999 | BINARY_OP (%); | |
8000 | BINARY_OP (^); | |
8001 | BINARY_OP (|); | |
8002 | BINARY_OP (&); | |
8003 | BINARY_OP (+); | |
8004 | BINARY_OP (-); | |
8005 | BINARY_OP (<); | |
8006 | BINARY_OP (>); | |
8007 | #undef UNARY_OP | |
8008 | #undef BINARY_OP | |
8009 | _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym); | |
8010 | bfd_set_error (bfd_error_invalid_operation); | |
8011 | return FALSE; | |
8012 | } | |
8013 | } | |
8014 | ||
d9352518 | 8015 | static void |
a0c8462f AM |
8016 | put_value (bfd_vma size, |
8017 | unsigned long chunksz, | |
8018 | bfd *input_bfd, | |
8019 | bfd_vma x, | |
8020 | bfd_byte *location) | |
d9352518 DB |
8021 | { |
8022 | location += (size - chunksz); | |
8023 | ||
41cd1ad1 | 8024 | for (; size; size -= chunksz, location -= chunksz) |
d9352518 DB |
8025 | { |
8026 | switch (chunksz) | |
8027 | { | |
d9352518 DB |
8028 | case 1: |
8029 | bfd_put_8 (input_bfd, x, location); | |
41cd1ad1 | 8030 | x >>= 8; |
d9352518 DB |
8031 | break; |
8032 | case 2: | |
8033 | bfd_put_16 (input_bfd, x, location); | |
41cd1ad1 | 8034 | x >>= 16; |
d9352518 DB |
8035 | break; |
8036 | case 4: | |
8037 | bfd_put_32 (input_bfd, x, location); | |
65164438 NC |
8038 | /* Computed this way because x >>= 32 is undefined if x is a 32-bit value. */ |
8039 | x >>= 16; | |
8040 | x >>= 16; | |
d9352518 | 8041 | break; |
d9352518 | 8042 | #ifdef BFD64 |
41cd1ad1 | 8043 | case 8: |
d9352518 | 8044 | bfd_put_64 (input_bfd, x, location); |
41cd1ad1 NC |
8045 | /* Computed this way because x >>= 64 is undefined if x is a 64-bit value. */ |
8046 | x >>= 32; | |
8047 | x >>= 32; | |
8048 | break; | |
d9352518 | 8049 | #endif |
41cd1ad1 NC |
8050 | default: |
8051 | abort (); | |
d9352518 DB |
8052 | break; |
8053 | } | |
8054 | } | |
8055 | } | |
8056 | ||
a0c8462f AM |
8057 | static bfd_vma |
8058 | get_value (bfd_vma size, | |
8059 | unsigned long chunksz, | |
8060 | bfd *input_bfd, | |
8061 | bfd_byte *location) | |
d9352518 | 8062 | { |
9b239e0e | 8063 | int shift; |
d9352518 DB |
8064 | bfd_vma x = 0; |
8065 | ||
9b239e0e NC |
8066 | /* Sanity checks. */ |
8067 | BFD_ASSERT (chunksz <= sizeof (x) | |
8068 | && size >= chunksz | |
8069 | && chunksz != 0 | |
8070 | && (size % chunksz) == 0 | |
8071 | && input_bfd != NULL | |
8072 | && location != NULL); | |
8073 | ||
8074 | if (chunksz == sizeof (x)) | |
8075 | { | |
8076 | BFD_ASSERT (size == chunksz); | |
8077 | ||
8078 | /* Make sure that we do not perform an undefined shift operation. | |
8079 | We know that size == chunksz so there will only be one iteration | |
8080 | of the loop below. */ | |
8081 | shift = 0; | |
8082 | } | |
8083 | else | |
8084 | shift = 8 * chunksz; | |
8085 | ||
a0c8462f | 8086 | for (; size; size -= chunksz, location += chunksz) |
d9352518 DB |
8087 | { |
8088 | switch (chunksz) | |
8089 | { | |
d9352518 | 8090 | case 1: |
9b239e0e | 8091 | x = (x << shift) | bfd_get_8 (input_bfd, location); |
d9352518 DB |
8092 | break; |
8093 | case 2: | |
9b239e0e | 8094 | x = (x << shift) | bfd_get_16 (input_bfd, location); |
d9352518 DB |
8095 | break; |
8096 | case 4: | |
9b239e0e | 8097 | x = (x << shift) | bfd_get_32 (input_bfd, location); |
d9352518 | 8098 | break; |
d9352518 | 8099 | #ifdef BFD64 |
9b239e0e NC |
8100 | case 8: |
8101 | x = (x << shift) | bfd_get_64 (input_bfd, location); | |
d9352518 | 8102 | break; |
9b239e0e NC |
8103 | #endif |
8104 | default: | |
8105 | abort (); | |
d9352518 DB |
8106 | } |
8107 | } | |
8108 | return x; | |
8109 | } | |
8110 | ||
a0c8462f AM |
8111 | static void |
8112 | decode_complex_addend (unsigned long *start, /* in bits */ | |
8113 | unsigned long *oplen, /* in bits */ | |
8114 | unsigned long *len, /* in bits */ | |
8115 | unsigned long *wordsz, /* in bytes */ | |
8116 | unsigned long *chunksz, /* in bytes */ | |
8117 | unsigned long *lsb0_p, | |
8118 | unsigned long *signed_p, | |
8119 | unsigned long *trunc_p, | |
8120 | unsigned long encoded) | |
d9352518 DB |
8121 | { |
8122 | * start = encoded & 0x3F; | |
8123 | * len = (encoded >> 6) & 0x3F; | |
8124 | * oplen = (encoded >> 12) & 0x3F; | |
8125 | * wordsz = (encoded >> 18) & 0xF; | |
8126 | * chunksz = (encoded >> 22) & 0xF; | |
8127 | * lsb0_p = (encoded >> 27) & 1; | |
8128 | * signed_p = (encoded >> 28) & 1; | |
8129 | * trunc_p = (encoded >> 29) & 1; | |
8130 | } | |
8131 | ||
cdfeee4f | 8132 | bfd_reloc_status_type |
0f02bbd9 | 8133 | bfd_elf_perform_complex_relocation (bfd *input_bfd, |
cdfeee4f | 8134 | asection *input_section ATTRIBUTE_UNUSED, |
0f02bbd9 AM |
8135 | bfd_byte *contents, |
8136 | Elf_Internal_Rela *rel, | |
8137 | bfd_vma relocation) | |
d9352518 | 8138 | { |
0f02bbd9 AM |
8139 | bfd_vma shift, x, mask; |
8140 | unsigned long start, oplen, len, wordsz, chunksz, lsb0_p, signed_p, trunc_p; | |
cdfeee4f | 8141 | bfd_reloc_status_type r; |
d9352518 DB |
8142 | |
8143 | /* Perform this reloc, since it is complex. | |
8144 | (this is not to say that it necessarily refers to a complex | |
8145 | symbol; merely that it is a self-describing CGEN based reloc. | |
8146 | i.e. the addend has the complete reloc information (bit start, end, | |
a0c8462f | 8147 | word size, etc) encoded within it.). */ |
d9352518 | 8148 | |
a0c8462f AM |
8149 | decode_complex_addend (&start, &oplen, &len, &wordsz, |
8150 | &chunksz, &lsb0_p, &signed_p, | |
8151 | &trunc_p, rel->r_addend); | |
d9352518 DB |
8152 | |
8153 | mask = (((1L << (len - 1)) - 1) << 1) | 1; | |
8154 | ||
8155 | if (lsb0_p) | |
8156 | shift = (start + 1) - len; | |
8157 | else | |
8158 | shift = (8 * wordsz) - (start + len); | |
8159 | ||
37b01f6a DG |
8160 | x = get_value (wordsz, chunksz, input_bfd, |
8161 | contents + rel->r_offset * bfd_octets_per_byte (input_bfd)); | |
d9352518 DB |
8162 | |
8163 | #ifdef DEBUG | |
8164 | printf ("Doing complex reloc: " | |
8165 | "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, " | |
8166 | "chunksz %ld, start %ld, len %ld, oplen %ld\n" | |
8167 | " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n", | |
8168 | lsb0_p, signed_p, trunc_p, wordsz, chunksz, start, len, | |
9ccb8af9 AM |
8169 | oplen, (unsigned long) x, (unsigned long) mask, |
8170 | (unsigned long) relocation); | |
d9352518 DB |
8171 | #endif |
8172 | ||
cdfeee4f | 8173 | r = bfd_reloc_ok; |
d9352518 | 8174 | if (! trunc_p) |
cdfeee4f AM |
8175 | /* Now do an overflow check. */ |
8176 | r = bfd_check_overflow ((signed_p | |
8177 | ? complain_overflow_signed | |
8178 | : complain_overflow_unsigned), | |
8179 | len, 0, (8 * wordsz), | |
8180 | relocation); | |
a0c8462f | 8181 | |
d9352518 DB |
8182 | /* Do the deed. */ |
8183 | x = (x & ~(mask << shift)) | ((relocation & mask) << shift); | |
8184 | ||
8185 | #ifdef DEBUG | |
8186 | printf (" relocation: %8.8lx\n" | |
8187 | " shifted mask: %8.8lx\n" | |
8188 | " shifted/masked reloc: %8.8lx\n" | |
8189 | " result: %8.8lx\n", | |
9ccb8af9 AM |
8190 | (unsigned long) relocation, (unsigned long) (mask << shift), |
8191 | (unsigned long) ((relocation & mask) << shift), (unsigned long) x); | |
d9352518 | 8192 | #endif |
37b01f6a DG |
8193 | put_value (wordsz, chunksz, input_bfd, x, |
8194 | contents + rel->r_offset * bfd_octets_per_byte (input_bfd)); | |
cdfeee4f | 8195 | return r; |
d9352518 DB |
8196 | } |
8197 | ||
0e287786 AM |
8198 | /* Functions to read r_offset from external (target order) reloc |
8199 | entry. Faster than bfd_getl32 et al, because we let the compiler | |
8200 | know the value is aligned. */ | |
53df40a4 | 8201 | |
0e287786 AM |
8202 | static bfd_vma |
8203 | ext32l_r_offset (const void *p) | |
53df40a4 AM |
8204 | { |
8205 | union aligned32 | |
8206 | { | |
8207 | uint32_t v; | |
8208 | unsigned char c[4]; | |
8209 | }; | |
8210 | const union aligned32 *a | |
0e287786 | 8211 | = (const union aligned32 *) &((const Elf32_External_Rel *) p)->r_offset; |
53df40a4 AM |
8212 | |
8213 | uint32_t aval = ( (uint32_t) a->c[0] | |
8214 | | (uint32_t) a->c[1] << 8 | |
8215 | | (uint32_t) a->c[2] << 16 | |
8216 | | (uint32_t) a->c[3] << 24); | |
0e287786 | 8217 | return aval; |
53df40a4 AM |
8218 | } |
8219 | ||
0e287786 AM |
8220 | static bfd_vma |
8221 | ext32b_r_offset (const void *p) | |
53df40a4 AM |
8222 | { |
8223 | union aligned32 | |
8224 | { | |
8225 | uint32_t v; | |
8226 | unsigned char c[4]; | |
8227 | }; | |
8228 | const union aligned32 *a | |
0e287786 | 8229 | = (const union aligned32 *) &((const Elf32_External_Rel *) p)->r_offset; |
53df40a4 AM |
8230 | |
8231 | uint32_t aval = ( (uint32_t) a->c[0] << 24 | |
8232 | | (uint32_t) a->c[1] << 16 | |
8233 | | (uint32_t) a->c[2] << 8 | |
8234 | | (uint32_t) a->c[3]); | |
0e287786 | 8235 | return aval; |
53df40a4 AM |
8236 | } |
8237 | ||
8238 | #ifdef BFD_HOST_64_BIT | |
0e287786 AM |
8239 | static bfd_vma |
8240 | ext64l_r_offset (const void *p) | |
53df40a4 AM |
8241 | { |
8242 | union aligned64 | |
8243 | { | |
8244 | uint64_t v; | |
8245 | unsigned char c[8]; | |
8246 | }; | |
8247 | const union aligned64 *a | |
0e287786 | 8248 | = (const union aligned64 *) &((const Elf64_External_Rel *) p)->r_offset; |
53df40a4 AM |
8249 | |
8250 | uint64_t aval = ( (uint64_t) a->c[0] | |
8251 | | (uint64_t) a->c[1] << 8 | |
8252 | | (uint64_t) a->c[2] << 16 | |
8253 | | (uint64_t) a->c[3] << 24 | |
8254 | | (uint64_t) a->c[4] << 32 | |
8255 | | (uint64_t) a->c[5] << 40 | |
8256 | | (uint64_t) a->c[6] << 48 | |
8257 | | (uint64_t) a->c[7] << 56); | |
0e287786 | 8258 | return aval; |
53df40a4 AM |
8259 | } |
8260 | ||
0e287786 AM |
8261 | static bfd_vma |
8262 | ext64b_r_offset (const void *p) | |
53df40a4 AM |
8263 | { |
8264 | union aligned64 | |
8265 | { | |
8266 | uint64_t v; | |
8267 | unsigned char c[8]; | |
8268 | }; | |
8269 | const union aligned64 *a | |
0e287786 | 8270 | = (const union aligned64 *) &((const Elf64_External_Rel *) p)->r_offset; |
53df40a4 AM |
8271 | |
8272 | uint64_t aval = ( (uint64_t) a->c[0] << 56 | |
8273 | | (uint64_t) a->c[1] << 48 | |
8274 | | (uint64_t) a->c[2] << 40 | |
8275 | | (uint64_t) a->c[3] << 32 | |
8276 | | (uint64_t) a->c[4] << 24 | |
8277 | | (uint64_t) a->c[5] << 16 | |
8278 | | (uint64_t) a->c[6] << 8 | |
8279 | | (uint64_t) a->c[7]); | |
0e287786 | 8280 | return aval; |
53df40a4 AM |
8281 | } |
8282 | #endif | |
8283 | ||
c152c796 AM |
8284 | /* When performing a relocatable link, the input relocations are |
8285 | preserved. But, if they reference global symbols, the indices | |
d4730f92 BS |
8286 | referenced must be updated. Update all the relocations found in |
8287 | RELDATA. */ | |
c152c796 | 8288 | |
bca6d0e3 | 8289 | static bfd_boolean |
c152c796 | 8290 | elf_link_adjust_relocs (bfd *abfd, |
28dbcedc AM |
8291 | struct bfd_elf_section_reloc_data *reldata, |
8292 | bfd_boolean sort) | |
c152c796 AM |
8293 | { |
8294 | unsigned int i; | |
8295 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8296 | bfd_byte *erela; | |
8297 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); | |
8298 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
8299 | bfd_vma r_type_mask; | |
8300 | int r_sym_shift; | |
d4730f92 BS |
8301 | unsigned int count = reldata->count; |
8302 | struct elf_link_hash_entry **rel_hash = reldata->hashes; | |
c152c796 | 8303 | |
d4730f92 | 8304 | if (reldata->hdr->sh_entsize == bed->s->sizeof_rel) |
c152c796 AM |
8305 | { |
8306 | swap_in = bed->s->swap_reloc_in; | |
8307 | swap_out = bed->s->swap_reloc_out; | |
8308 | } | |
d4730f92 | 8309 | else if (reldata->hdr->sh_entsize == bed->s->sizeof_rela) |
c152c796 AM |
8310 | { |
8311 | swap_in = bed->s->swap_reloca_in; | |
8312 | swap_out = bed->s->swap_reloca_out; | |
8313 | } | |
8314 | else | |
8315 | abort (); | |
8316 | ||
8317 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
8318 | abort (); | |
8319 | ||
8320 | if (bed->s->arch_size == 32) | |
8321 | { | |
8322 | r_type_mask = 0xff; | |
8323 | r_sym_shift = 8; | |
8324 | } | |
8325 | else | |
8326 | { | |
8327 | r_type_mask = 0xffffffff; | |
8328 | r_sym_shift = 32; | |
8329 | } | |
8330 | ||
d4730f92 BS |
8331 | erela = reldata->hdr->contents; |
8332 | for (i = 0; i < count; i++, rel_hash++, erela += reldata->hdr->sh_entsize) | |
c152c796 AM |
8333 | { |
8334 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; | |
8335 | unsigned int j; | |
8336 | ||
8337 | if (*rel_hash == NULL) | |
8338 | continue; | |
8339 | ||
8340 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
8341 | ||
8342 | (*swap_in) (abfd, erela, irela); | |
8343 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
8344 | irela[j].r_info = ((bfd_vma) (*rel_hash)->indx << r_sym_shift | |
8345 | | (irela[j].r_info & r_type_mask)); | |
8346 | (*swap_out) (abfd, irela, erela); | |
8347 | } | |
53df40a4 | 8348 | |
0e287786 | 8349 | if (sort && count != 0) |
53df40a4 | 8350 | { |
0e287786 AM |
8351 | bfd_vma (*ext_r_off) (const void *); |
8352 | bfd_vma r_off; | |
8353 | size_t elt_size; | |
8354 | bfd_byte *base, *end, *p, *loc; | |
bca6d0e3 | 8355 | bfd_byte *buf = NULL; |
28dbcedc AM |
8356 | |
8357 | if (bed->s->arch_size == 32) | |
8358 | { | |
8359 | if (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE) | |
0e287786 | 8360 | ext_r_off = ext32l_r_offset; |
28dbcedc | 8361 | else if (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
0e287786 | 8362 | ext_r_off = ext32b_r_offset; |
28dbcedc AM |
8363 | else |
8364 | abort (); | |
8365 | } | |
53df40a4 | 8366 | else |
28dbcedc | 8367 | { |
53df40a4 | 8368 | #ifdef BFD_HOST_64_BIT |
28dbcedc | 8369 | if (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE) |
0e287786 | 8370 | ext_r_off = ext64l_r_offset; |
28dbcedc | 8371 | else if (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
0e287786 | 8372 | ext_r_off = ext64b_r_offset; |
28dbcedc | 8373 | else |
53df40a4 | 8374 | #endif |
28dbcedc AM |
8375 | abort (); |
8376 | } | |
0e287786 | 8377 | |
bca6d0e3 AM |
8378 | /* Must use a stable sort here. A modified insertion sort, |
8379 | since the relocs are mostly sorted already. */ | |
0e287786 AM |
8380 | elt_size = reldata->hdr->sh_entsize; |
8381 | base = reldata->hdr->contents; | |
8382 | end = base + count * elt_size; | |
bca6d0e3 | 8383 | if (elt_size > sizeof (Elf64_External_Rela)) |
0e287786 AM |
8384 | abort (); |
8385 | ||
8386 | /* Ensure the first element is lowest. This acts as a sentinel, | |
8387 | speeding the main loop below. */ | |
8388 | r_off = (*ext_r_off) (base); | |
8389 | for (p = loc = base; (p += elt_size) < end; ) | |
8390 | { | |
8391 | bfd_vma r_off2 = (*ext_r_off) (p); | |
8392 | if (r_off > r_off2) | |
8393 | { | |
8394 | r_off = r_off2; | |
8395 | loc = p; | |
8396 | } | |
8397 | } | |
8398 | if (loc != base) | |
8399 | { | |
8400 | /* Don't just swap *base and *loc as that changes the order | |
8401 | of the original base[0] and base[1] if they happen to | |
8402 | have the same r_offset. */ | |
bca6d0e3 AM |
8403 | bfd_byte onebuf[sizeof (Elf64_External_Rela)]; |
8404 | memcpy (onebuf, loc, elt_size); | |
0e287786 | 8405 | memmove (base + elt_size, base, loc - base); |
bca6d0e3 | 8406 | memcpy (base, onebuf, elt_size); |
0e287786 AM |
8407 | } |
8408 | ||
b29b8669 | 8409 | for (p = base + elt_size; (p += elt_size) < end; ) |
0e287786 AM |
8410 | { |
8411 | /* base to p is sorted, *p is next to insert. */ | |
8412 | r_off = (*ext_r_off) (p); | |
8413 | /* Search the sorted region for location to insert. */ | |
8414 | loc = p - elt_size; | |
8415 | while (r_off < (*ext_r_off) (loc)) | |
8416 | loc -= elt_size; | |
8417 | loc += elt_size; | |
8418 | if (loc != p) | |
8419 | { | |
bca6d0e3 AM |
8420 | /* Chances are there is a run of relocs to insert here, |
8421 | from one of more input files. Files are not always | |
8422 | linked in order due to the way elf_link_input_bfd is | |
8423 | called. See pr17666. */ | |
8424 | size_t sortlen = p - loc; | |
8425 | bfd_vma r_off2 = (*ext_r_off) (loc); | |
8426 | size_t runlen = elt_size; | |
8427 | size_t buf_size = 96 * 1024; | |
8428 | while (p + runlen < end | |
8429 | && (sortlen <= buf_size | |
8430 | || runlen + elt_size <= buf_size) | |
8431 | && r_off2 > (*ext_r_off) (p + runlen)) | |
8432 | runlen += elt_size; | |
8433 | if (buf == NULL) | |
8434 | { | |
8435 | buf = bfd_malloc (buf_size); | |
8436 | if (buf == NULL) | |
8437 | return FALSE; | |
8438 | } | |
8439 | if (runlen < sortlen) | |
8440 | { | |
8441 | memcpy (buf, p, runlen); | |
8442 | memmove (loc + runlen, loc, sortlen); | |
8443 | memcpy (loc, buf, runlen); | |
8444 | } | |
8445 | else | |
8446 | { | |
8447 | memcpy (buf, loc, sortlen); | |
8448 | memmove (loc, p, runlen); | |
8449 | memcpy (loc + runlen, buf, sortlen); | |
8450 | } | |
b29b8669 | 8451 | p += runlen - elt_size; |
0e287786 AM |
8452 | } |
8453 | } | |
8454 | /* Hashes are no longer valid. */ | |
28dbcedc AM |
8455 | free (reldata->hashes); |
8456 | reldata->hashes = NULL; | |
bca6d0e3 | 8457 | free (buf); |
53df40a4 | 8458 | } |
bca6d0e3 | 8459 | return TRUE; |
c152c796 AM |
8460 | } |
8461 | ||
8462 | struct elf_link_sort_rela | |
8463 | { | |
8464 | union { | |
8465 | bfd_vma offset; | |
8466 | bfd_vma sym_mask; | |
8467 | } u; | |
8468 | enum elf_reloc_type_class type; | |
8469 | /* We use this as an array of size int_rels_per_ext_rel. */ | |
8470 | Elf_Internal_Rela rela[1]; | |
8471 | }; | |
8472 | ||
8473 | static int | |
8474 | elf_link_sort_cmp1 (const void *A, const void *B) | |
8475 | { | |
a50b1753 NC |
8476 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
8477 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 AM |
8478 | int relativea, relativeb; |
8479 | ||
8480 | relativea = a->type == reloc_class_relative; | |
8481 | relativeb = b->type == reloc_class_relative; | |
8482 | ||
8483 | if (relativea < relativeb) | |
8484 | return 1; | |
8485 | if (relativea > relativeb) | |
8486 | return -1; | |
8487 | if ((a->rela->r_info & a->u.sym_mask) < (b->rela->r_info & b->u.sym_mask)) | |
8488 | return -1; | |
8489 | if ((a->rela->r_info & a->u.sym_mask) > (b->rela->r_info & b->u.sym_mask)) | |
8490 | return 1; | |
8491 | if (a->rela->r_offset < b->rela->r_offset) | |
8492 | return -1; | |
8493 | if (a->rela->r_offset > b->rela->r_offset) | |
8494 | return 1; | |
8495 | return 0; | |
8496 | } | |
8497 | ||
8498 | static int | |
8499 | elf_link_sort_cmp2 (const void *A, const void *B) | |
8500 | { | |
a50b1753 NC |
8501 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
8502 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 | 8503 | |
7e612e98 | 8504 | if (a->type < b->type) |
c152c796 | 8505 | return -1; |
7e612e98 | 8506 | if (a->type > b->type) |
c152c796 | 8507 | return 1; |
7e612e98 | 8508 | if (a->u.offset < b->u.offset) |
c152c796 | 8509 | return -1; |
7e612e98 | 8510 | if (a->u.offset > b->u.offset) |
c152c796 AM |
8511 | return 1; |
8512 | if (a->rela->r_offset < b->rela->r_offset) | |
8513 | return -1; | |
8514 | if (a->rela->r_offset > b->rela->r_offset) | |
8515 | return 1; | |
8516 | return 0; | |
8517 | } | |
8518 | ||
8519 | static size_t | |
8520 | elf_link_sort_relocs (bfd *abfd, struct bfd_link_info *info, asection **psec) | |
8521 | { | |
3410fea8 | 8522 | asection *dynamic_relocs; |
fc66a176 L |
8523 | asection *rela_dyn; |
8524 | asection *rel_dyn; | |
c152c796 AM |
8525 | bfd_size_type count, size; |
8526 | size_t i, ret, sort_elt, ext_size; | |
8527 | bfd_byte *sort, *s_non_relative, *p; | |
8528 | struct elf_link_sort_rela *sq; | |
8529 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8530 | int i2e = bed->s->int_rels_per_ext_rel; | |
c8e44c6d | 8531 | unsigned int opb = bfd_octets_per_byte (abfd); |
c152c796 AM |
8532 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
8533 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
8534 | struct bfd_link_order *lo; | |
8535 | bfd_vma r_sym_mask; | |
3410fea8 | 8536 | bfd_boolean use_rela; |
c152c796 | 8537 | |
3410fea8 NC |
8538 | /* Find a dynamic reloc section. */ |
8539 | rela_dyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
8540 | rel_dyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
8541 | if (rela_dyn != NULL && rela_dyn->size > 0 | |
8542 | && rel_dyn != NULL && rel_dyn->size > 0) | |
c152c796 | 8543 | { |
3410fea8 NC |
8544 | bfd_boolean use_rela_initialised = FALSE; |
8545 | ||
8546 | /* This is just here to stop gcc from complaining. | |
c8e44c6d | 8547 | Its initialization checking code is not perfect. */ |
3410fea8 NC |
8548 | use_rela = TRUE; |
8549 | ||
8550 | /* Both sections are present. Examine the sizes | |
8551 | of the indirect sections to help us choose. */ | |
8552 | for (lo = rela_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
8553 | if (lo->type == bfd_indirect_link_order) | |
8554 | { | |
8555 | asection *o = lo->u.indirect.section; | |
8556 | ||
8557 | if ((o->size % bed->s->sizeof_rela) == 0) | |
8558 | { | |
8559 | if ((o->size % bed->s->sizeof_rel) == 0) | |
8560 | /* Section size is divisible by both rel and rela sizes. | |
8561 | It is of no help to us. */ | |
8562 | ; | |
8563 | else | |
8564 | { | |
8565 | /* Section size is only divisible by rela. */ | |
8566 | if (use_rela_initialised && (use_rela == FALSE)) | |
8567 | { | |
c8e44c6d AM |
8568 | _bfd_error_handler (_("%B: Unable to sort relocs - " |
8569 | "they are in more than one size"), | |
8570 | abfd); | |
3410fea8 NC |
8571 | bfd_set_error (bfd_error_invalid_operation); |
8572 | return 0; | |
8573 | } | |
8574 | else | |
8575 | { | |
8576 | use_rela = TRUE; | |
8577 | use_rela_initialised = TRUE; | |
8578 | } | |
8579 | } | |
8580 | } | |
8581 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
8582 | { | |
8583 | /* Section size is only divisible by rel. */ | |
8584 | if (use_rela_initialised && (use_rela == TRUE)) | |
8585 | { | |
c8e44c6d AM |
8586 | _bfd_error_handler (_("%B: Unable to sort relocs - " |
8587 | "they are in more than one size"), | |
8588 | abfd); | |
3410fea8 NC |
8589 | bfd_set_error (bfd_error_invalid_operation); |
8590 | return 0; | |
8591 | } | |
8592 | else | |
8593 | { | |
8594 | use_rela = FALSE; | |
8595 | use_rela_initialised = TRUE; | |
8596 | } | |
8597 | } | |
8598 | else | |
8599 | { | |
c8e44c6d AM |
8600 | /* The section size is not divisible by either - |
8601 | something is wrong. */ | |
8602 | _bfd_error_handler (_("%B: Unable to sort relocs - " | |
8603 | "they are of an unknown size"), abfd); | |
3410fea8 NC |
8604 | bfd_set_error (bfd_error_invalid_operation); |
8605 | return 0; | |
8606 | } | |
8607 | } | |
8608 | ||
8609 | for (lo = rel_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
8610 | if (lo->type == bfd_indirect_link_order) | |
8611 | { | |
8612 | asection *o = lo->u.indirect.section; | |
8613 | ||
8614 | if ((o->size % bed->s->sizeof_rela) == 0) | |
8615 | { | |
8616 | if ((o->size % bed->s->sizeof_rel) == 0) | |
8617 | /* Section size is divisible by both rel and rela sizes. | |
8618 | It is of no help to us. */ | |
8619 | ; | |
8620 | else | |
8621 | { | |
8622 | /* Section size is only divisible by rela. */ | |
8623 | if (use_rela_initialised && (use_rela == FALSE)) | |
8624 | { | |
c8e44c6d AM |
8625 | _bfd_error_handler (_("%B: Unable to sort relocs - " |
8626 | "they are in more than one size"), | |
8627 | abfd); | |
3410fea8 NC |
8628 | bfd_set_error (bfd_error_invalid_operation); |
8629 | return 0; | |
8630 | } | |
8631 | else | |
8632 | { | |
8633 | use_rela = TRUE; | |
8634 | use_rela_initialised = TRUE; | |
8635 | } | |
8636 | } | |
8637 | } | |
8638 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
8639 | { | |
8640 | /* Section size is only divisible by rel. */ | |
8641 | if (use_rela_initialised && (use_rela == TRUE)) | |
8642 | { | |
c8e44c6d AM |
8643 | _bfd_error_handler (_("%B: Unable to sort relocs - " |
8644 | "they are in more than one size"), | |
8645 | abfd); | |
3410fea8 NC |
8646 | bfd_set_error (bfd_error_invalid_operation); |
8647 | return 0; | |
8648 | } | |
8649 | else | |
8650 | { | |
8651 | use_rela = FALSE; | |
8652 | use_rela_initialised = TRUE; | |
8653 | } | |
8654 | } | |
8655 | else | |
8656 | { | |
c8e44c6d AM |
8657 | /* The section size is not divisible by either - |
8658 | something is wrong. */ | |
8659 | _bfd_error_handler (_("%B: Unable to sort relocs - " | |
8660 | "they are of an unknown size"), abfd); | |
3410fea8 NC |
8661 | bfd_set_error (bfd_error_invalid_operation); |
8662 | return 0; | |
8663 | } | |
8664 | } | |
8665 | ||
8666 | if (! use_rela_initialised) | |
8667 | /* Make a guess. */ | |
8668 | use_rela = TRUE; | |
c152c796 | 8669 | } |
fc66a176 L |
8670 | else if (rela_dyn != NULL && rela_dyn->size > 0) |
8671 | use_rela = TRUE; | |
8672 | else if (rel_dyn != NULL && rel_dyn->size > 0) | |
3410fea8 | 8673 | use_rela = FALSE; |
c152c796 | 8674 | else |
fc66a176 | 8675 | return 0; |
3410fea8 NC |
8676 | |
8677 | if (use_rela) | |
c152c796 | 8678 | { |
3410fea8 | 8679 | dynamic_relocs = rela_dyn; |
c152c796 AM |
8680 | ext_size = bed->s->sizeof_rela; |
8681 | swap_in = bed->s->swap_reloca_in; | |
8682 | swap_out = bed->s->swap_reloca_out; | |
8683 | } | |
3410fea8 NC |
8684 | else |
8685 | { | |
8686 | dynamic_relocs = rel_dyn; | |
8687 | ext_size = bed->s->sizeof_rel; | |
8688 | swap_in = bed->s->swap_reloc_in; | |
8689 | swap_out = bed->s->swap_reloc_out; | |
8690 | } | |
c152c796 AM |
8691 | |
8692 | size = 0; | |
3410fea8 | 8693 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 | 8694 | if (lo->type == bfd_indirect_link_order) |
3410fea8 | 8695 | size += lo->u.indirect.section->size; |
c152c796 | 8696 | |
3410fea8 | 8697 | if (size != dynamic_relocs->size) |
c152c796 AM |
8698 | return 0; |
8699 | ||
8700 | sort_elt = (sizeof (struct elf_link_sort_rela) | |
8701 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
3410fea8 NC |
8702 | |
8703 | count = dynamic_relocs->size / ext_size; | |
5e486aa1 NC |
8704 | if (count == 0) |
8705 | return 0; | |
a50b1753 | 8706 | sort = (bfd_byte *) bfd_zmalloc (sort_elt * count); |
3410fea8 | 8707 | |
c152c796 AM |
8708 | if (sort == NULL) |
8709 | { | |
8710 | (*info->callbacks->warning) | |
8711 | (info, _("Not enough memory to sort relocations"), 0, abfd, 0, 0); | |
8712 | return 0; | |
8713 | } | |
8714 | ||
8715 | if (bed->s->arch_size == 32) | |
8716 | r_sym_mask = ~(bfd_vma) 0xff; | |
8717 | else | |
8718 | r_sym_mask = ~(bfd_vma) 0xffffffff; | |
8719 | ||
3410fea8 | 8720 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
8721 | if (lo->type == bfd_indirect_link_order) |
8722 | { | |
8723 | bfd_byte *erel, *erelend; | |
8724 | asection *o = lo->u.indirect.section; | |
8725 | ||
1da212d6 AM |
8726 | if (o->contents == NULL && o->size != 0) |
8727 | { | |
8728 | /* This is a reloc section that is being handled as a normal | |
8729 | section. See bfd_section_from_shdr. We can't combine | |
8730 | relocs in this case. */ | |
8731 | free (sort); | |
8732 | return 0; | |
8733 | } | |
c152c796 | 8734 | erel = o->contents; |
eea6121a | 8735 | erelend = o->contents + o->size; |
c8e44c6d | 8736 | p = sort + o->output_offset * opb / ext_size * sort_elt; |
3410fea8 | 8737 | |
c152c796 AM |
8738 | while (erel < erelend) |
8739 | { | |
8740 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
3410fea8 | 8741 | |
c152c796 | 8742 | (*swap_in) (abfd, erel, s->rela); |
7e612e98 | 8743 | s->type = (*bed->elf_backend_reloc_type_class) (info, o, s->rela); |
c152c796 AM |
8744 | s->u.sym_mask = r_sym_mask; |
8745 | p += sort_elt; | |
8746 | erel += ext_size; | |
8747 | } | |
8748 | } | |
8749 | ||
8750 | qsort (sort, count, sort_elt, elf_link_sort_cmp1); | |
8751 | ||
8752 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
8753 | { | |
8754 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
8755 | if (s->type != reloc_class_relative) | |
8756 | break; | |
8757 | } | |
8758 | ret = i; | |
8759 | s_non_relative = p; | |
8760 | ||
8761 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
8762 | for (; i < count; i++, p += sort_elt) | |
8763 | { | |
8764 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
8765 | if (((sp->rela->r_info ^ sq->rela->r_info) & r_sym_mask) != 0) | |
8766 | sq = sp; | |
8767 | sp->u.offset = sq->rela->r_offset; | |
8768 | } | |
8769 | ||
8770 | qsort (s_non_relative, count - ret, sort_elt, elf_link_sort_cmp2); | |
8771 | ||
c8e44c6d AM |
8772 | struct elf_link_hash_table *htab = elf_hash_table (info); |
8773 | if (htab->srelplt && htab->srelplt->output_section == dynamic_relocs) | |
8774 | { | |
8775 | /* We have plt relocs in .rela.dyn. */ | |
8776 | sq = (struct elf_link_sort_rela *) sort; | |
8777 | for (i = 0; i < count; i++) | |
8778 | if (sq[count - i - 1].type != reloc_class_plt) | |
8779 | break; | |
8780 | if (i != 0 && htab->srelplt->size == i * ext_size) | |
8781 | { | |
8782 | struct bfd_link_order **plo; | |
8783 | /* Put srelplt link_order last. This is so the output_offset | |
8784 | set in the next loop is correct for DT_JMPREL. */ | |
8785 | for (plo = &dynamic_relocs->map_head.link_order; *plo != NULL; ) | |
8786 | if ((*plo)->type == bfd_indirect_link_order | |
8787 | && (*plo)->u.indirect.section == htab->srelplt) | |
8788 | { | |
8789 | lo = *plo; | |
8790 | *plo = lo->next; | |
8791 | } | |
8792 | else | |
8793 | plo = &(*plo)->next; | |
8794 | *plo = lo; | |
8795 | lo->next = NULL; | |
8796 | dynamic_relocs->map_tail.link_order = lo; | |
8797 | } | |
8798 | } | |
8799 | ||
8800 | p = sort; | |
3410fea8 | 8801 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
8802 | if (lo->type == bfd_indirect_link_order) |
8803 | { | |
8804 | bfd_byte *erel, *erelend; | |
8805 | asection *o = lo->u.indirect.section; | |
8806 | ||
8807 | erel = o->contents; | |
eea6121a | 8808 | erelend = o->contents + o->size; |
c8e44c6d | 8809 | o->output_offset = (p - sort) / sort_elt * ext_size / opb; |
c152c796 AM |
8810 | while (erel < erelend) |
8811 | { | |
8812 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
8813 | (*swap_out) (abfd, s->rela, erel); | |
8814 | p += sort_elt; | |
8815 | erel += ext_size; | |
8816 | } | |
8817 | } | |
8818 | ||
8819 | free (sort); | |
3410fea8 | 8820 | *psec = dynamic_relocs; |
c152c796 AM |
8821 | return ret; |
8822 | } | |
8823 | ||
ef10c3ac | 8824 | /* Add a symbol to the output symbol string table. */ |
c152c796 | 8825 | |
6e0b88f1 | 8826 | static int |
ef10c3ac L |
8827 | elf_link_output_symstrtab (struct elf_final_link_info *flinfo, |
8828 | const char *name, | |
8829 | Elf_Internal_Sym *elfsym, | |
8830 | asection *input_sec, | |
8831 | struct elf_link_hash_entry *h) | |
c152c796 | 8832 | { |
6e0b88f1 | 8833 | int (*output_symbol_hook) |
c152c796 AM |
8834 | (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *, |
8835 | struct elf_link_hash_entry *); | |
ef10c3ac | 8836 | struct elf_link_hash_table *hash_table; |
c152c796 | 8837 | const struct elf_backend_data *bed; |
ef10c3ac | 8838 | bfd_size_type strtabsize; |
c152c796 | 8839 | |
8539e4e8 AM |
8840 | BFD_ASSERT (elf_onesymtab (flinfo->output_bfd)); |
8841 | ||
8b127cbc | 8842 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 AM |
8843 | output_symbol_hook = bed->elf_backend_link_output_symbol_hook; |
8844 | if (output_symbol_hook != NULL) | |
8845 | { | |
8b127cbc | 8846 | int ret = (*output_symbol_hook) (flinfo->info, name, elfsym, input_sec, h); |
6e0b88f1 AM |
8847 | if (ret != 1) |
8848 | return ret; | |
c152c796 AM |
8849 | } |
8850 | ||
ef10c3ac L |
8851 | if (name == NULL |
8852 | || *name == '\0' | |
8853 | || (input_sec->flags & SEC_EXCLUDE)) | |
8854 | elfsym->st_name = (unsigned long) -1; | |
c152c796 AM |
8855 | else |
8856 | { | |
ef10c3ac L |
8857 | /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize |
8858 | to get the final offset for st_name. */ | |
8859 | elfsym->st_name | |
8860 | = (unsigned long) _bfd_elf_strtab_add (flinfo->symstrtab, | |
8861 | name, FALSE); | |
c152c796 | 8862 | if (elfsym->st_name == (unsigned long) -1) |
6e0b88f1 | 8863 | return 0; |
c152c796 AM |
8864 | } |
8865 | ||
ef10c3ac L |
8866 | hash_table = elf_hash_table (flinfo->info); |
8867 | strtabsize = hash_table->strtabsize; | |
8868 | if (strtabsize <= hash_table->strtabcount) | |
c152c796 | 8869 | { |
ef10c3ac L |
8870 | strtabsize += strtabsize; |
8871 | hash_table->strtabsize = strtabsize; | |
8872 | strtabsize *= sizeof (*hash_table->strtab); | |
8873 | hash_table->strtab | |
8874 | = (struct elf_sym_strtab *) bfd_realloc (hash_table->strtab, | |
8875 | strtabsize); | |
8876 | if (hash_table->strtab == NULL) | |
6e0b88f1 | 8877 | return 0; |
c152c796 | 8878 | } |
ef10c3ac L |
8879 | hash_table->strtab[hash_table->strtabcount].sym = *elfsym; |
8880 | hash_table->strtab[hash_table->strtabcount].dest_index | |
8881 | = hash_table->strtabcount; | |
8882 | hash_table->strtab[hash_table->strtabcount].destshndx_index | |
8883 | = flinfo->symshndxbuf ? bfd_get_symcount (flinfo->output_bfd) : 0; | |
8884 | ||
8885 | bfd_get_symcount (flinfo->output_bfd) += 1; | |
8886 | hash_table->strtabcount += 1; | |
8887 | ||
8888 | return 1; | |
8889 | } | |
8890 | ||
8891 | /* Swap symbols out to the symbol table and flush the output symbols to | |
8892 | the file. */ | |
8893 | ||
8894 | static bfd_boolean | |
8895 | elf_link_swap_symbols_out (struct elf_final_link_info *flinfo) | |
8896 | { | |
8897 | struct elf_link_hash_table *hash_table = elf_hash_table (flinfo->info); | |
8898 | bfd_size_type amt, i; | |
8899 | const struct elf_backend_data *bed; | |
8900 | bfd_byte *symbuf; | |
8901 | Elf_Internal_Shdr *hdr; | |
8902 | file_ptr pos; | |
8903 | bfd_boolean ret; | |
8904 | ||
8905 | if (!hash_table->strtabcount) | |
8906 | return TRUE; | |
8907 | ||
8908 | BFD_ASSERT (elf_onesymtab (flinfo->output_bfd)); | |
8909 | ||
8910 | bed = get_elf_backend_data (flinfo->output_bfd); | |
c152c796 | 8911 | |
ef10c3ac L |
8912 | amt = bed->s->sizeof_sym * hash_table->strtabcount; |
8913 | symbuf = (bfd_byte *) bfd_malloc (amt); | |
8914 | if (symbuf == NULL) | |
8915 | return FALSE; | |
1b786873 | 8916 | |
ef10c3ac | 8917 | if (flinfo->symshndxbuf) |
c152c796 | 8918 | { |
ef10c3ac L |
8919 | amt = (sizeof (Elf_External_Sym_Shndx) |
8920 | * (bfd_get_symcount (flinfo->output_bfd))); | |
8921 | flinfo->symshndxbuf = (Elf_External_Sym_Shndx *) bfd_zmalloc (amt); | |
8922 | if (flinfo->symshndxbuf == NULL) | |
c152c796 | 8923 | { |
ef10c3ac L |
8924 | free (symbuf); |
8925 | return FALSE; | |
c152c796 | 8926 | } |
c152c796 AM |
8927 | } |
8928 | ||
ef10c3ac L |
8929 | for (i = 0; i < hash_table->strtabcount; i++) |
8930 | { | |
8931 | struct elf_sym_strtab *elfsym = &hash_table->strtab[i]; | |
8932 | if (elfsym->sym.st_name == (unsigned long) -1) | |
8933 | elfsym->sym.st_name = 0; | |
8934 | else | |
8935 | elfsym->sym.st_name | |
8936 | = (unsigned long) _bfd_elf_strtab_offset (flinfo->symstrtab, | |
8937 | elfsym->sym.st_name); | |
8938 | bed->s->swap_symbol_out (flinfo->output_bfd, &elfsym->sym, | |
8939 | ((bfd_byte *) symbuf | |
8940 | + (elfsym->dest_index | |
8941 | * bed->s->sizeof_sym)), | |
8942 | (flinfo->symshndxbuf | |
8943 | + elfsym->destshndx_index)); | |
8944 | } | |
8945 | ||
8946 | hdr = &elf_tdata (flinfo->output_bfd)->symtab_hdr; | |
8947 | pos = hdr->sh_offset + hdr->sh_size; | |
8948 | amt = hash_table->strtabcount * bed->s->sizeof_sym; | |
8949 | if (bfd_seek (flinfo->output_bfd, pos, SEEK_SET) == 0 | |
8950 | && bfd_bwrite (symbuf, amt, flinfo->output_bfd) == amt) | |
8951 | { | |
8952 | hdr->sh_size += amt; | |
8953 | ret = TRUE; | |
8954 | } | |
8955 | else | |
8956 | ret = FALSE; | |
c152c796 | 8957 | |
ef10c3ac L |
8958 | free (symbuf); |
8959 | ||
8960 | free (hash_table->strtab); | |
8961 | hash_table->strtab = NULL; | |
8962 | ||
8963 | return ret; | |
c152c796 AM |
8964 | } |
8965 | ||
c0d5a53d L |
8966 | /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */ |
8967 | ||
8968 | static bfd_boolean | |
8969 | check_dynsym (bfd *abfd, Elf_Internal_Sym *sym) | |
8970 | { | |
4fbb74a6 AM |
8971 | if (sym->st_shndx >= (SHN_LORESERVE & 0xffff) |
8972 | && sym->st_shndx < SHN_LORESERVE) | |
c0d5a53d L |
8973 | { |
8974 | /* The gABI doesn't support dynamic symbols in output sections | |
a0c8462f | 8975 | beyond 64k. */ |
c0d5a53d L |
8976 | (*_bfd_error_handler) |
8977 | (_("%B: Too many sections: %d (>= %d)"), | |
4fbb74a6 | 8978 | abfd, bfd_count_sections (abfd), SHN_LORESERVE & 0xffff); |
c0d5a53d L |
8979 | bfd_set_error (bfd_error_nonrepresentable_section); |
8980 | return FALSE; | |
8981 | } | |
8982 | return TRUE; | |
8983 | } | |
8984 | ||
c152c796 AM |
8985 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
8986 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
8987 | versioned symbol that would normally require an explicit version. | |
8988 | We also handle the case that a DSO references a hidden symbol | |
8989 | which may be satisfied by a versioned symbol in another DSO. */ | |
8990 | ||
8991 | static bfd_boolean | |
8992 | elf_link_check_versioned_symbol (struct bfd_link_info *info, | |
8993 | const struct elf_backend_data *bed, | |
8994 | struct elf_link_hash_entry *h) | |
8995 | { | |
8996 | bfd *abfd; | |
8997 | struct elf_link_loaded_list *loaded; | |
8998 | ||
8999 | if (!is_elf_hash_table (info->hash)) | |
9000 | return FALSE; | |
9001 | ||
90c984fc L |
9002 | /* Check indirect symbol. */ |
9003 | while (h->root.type == bfd_link_hash_indirect) | |
9004 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9005 | ||
c152c796 AM |
9006 | switch (h->root.type) |
9007 | { | |
9008 | default: | |
9009 | abfd = NULL; | |
9010 | break; | |
9011 | ||
9012 | case bfd_link_hash_undefined: | |
9013 | case bfd_link_hash_undefweak: | |
9014 | abfd = h->root.u.undef.abfd; | |
9015 | if ((abfd->flags & DYNAMIC) == 0 | |
e56f61be | 9016 | || (elf_dyn_lib_class (abfd) & DYN_DT_NEEDED) == 0) |
c152c796 AM |
9017 | return FALSE; |
9018 | break; | |
9019 | ||
9020 | case bfd_link_hash_defined: | |
9021 | case bfd_link_hash_defweak: | |
9022 | abfd = h->root.u.def.section->owner; | |
9023 | break; | |
9024 | ||
9025 | case bfd_link_hash_common: | |
9026 | abfd = h->root.u.c.p->section->owner; | |
9027 | break; | |
9028 | } | |
9029 | BFD_ASSERT (abfd != NULL); | |
9030 | ||
9031 | for (loaded = elf_hash_table (info)->loaded; | |
9032 | loaded != NULL; | |
9033 | loaded = loaded->next) | |
9034 | { | |
9035 | bfd *input; | |
9036 | Elf_Internal_Shdr *hdr; | |
9037 | bfd_size_type symcount; | |
9038 | bfd_size_type extsymcount; | |
9039 | bfd_size_type extsymoff; | |
9040 | Elf_Internal_Shdr *versymhdr; | |
9041 | Elf_Internal_Sym *isym; | |
9042 | Elf_Internal_Sym *isymend; | |
9043 | Elf_Internal_Sym *isymbuf; | |
9044 | Elf_External_Versym *ever; | |
9045 | Elf_External_Versym *extversym; | |
9046 | ||
9047 | input = loaded->abfd; | |
9048 | ||
9049 | /* We check each DSO for a possible hidden versioned definition. */ | |
9050 | if (input == abfd | |
9051 | || (input->flags & DYNAMIC) == 0 | |
9052 | || elf_dynversym (input) == 0) | |
9053 | continue; | |
9054 | ||
9055 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
9056 | ||
9057 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
9058 | if (elf_bad_symtab (input)) | |
9059 | { | |
9060 | extsymcount = symcount; | |
9061 | extsymoff = 0; | |
9062 | } | |
9063 | else | |
9064 | { | |
9065 | extsymcount = symcount - hdr->sh_info; | |
9066 | extsymoff = hdr->sh_info; | |
9067 | } | |
9068 | ||
9069 | if (extsymcount == 0) | |
9070 | continue; | |
9071 | ||
9072 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, | |
9073 | NULL, NULL, NULL); | |
9074 | if (isymbuf == NULL) | |
9075 | return FALSE; | |
9076 | ||
9077 | /* Read in any version definitions. */ | |
9078 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
a50b1753 | 9079 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); |
c152c796 AM |
9080 | if (extversym == NULL) |
9081 | goto error_ret; | |
9082 | ||
9083 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 | |
9084 | || (bfd_bread (extversym, versymhdr->sh_size, input) | |
9085 | != versymhdr->sh_size)) | |
9086 | { | |
9087 | free (extversym); | |
9088 | error_ret: | |
9089 | free (isymbuf); | |
9090 | return FALSE; | |
9091 | } | |
9092 | ||
9093 | ever = extversym + extsymoff; | |
9094 | isymend = isymbuf + extsymcount; | |
9095 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
9096 | { | |
9097 | const char *name; | |
9098 | Elf_Internal_Versym iver; | |
9099 | unsigned short version_index; | |
9100 | ||
9101 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL | |
9102 | || isym->st_shndx == SHN_UNDEF) | |
9103 | continue; | |
9104 | ||
9105 | name = bfd_elf_string_from_elf_section (input, | |
9106 | hdr->sh_link, | |
9107 | isym->st_name); | |
9108 | if (strcmp (name, h->root.root.string) != 0) | |
9109 | continue; | |
9110 | ||
9111 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
9112 | ||
d023c380 L |
9113 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 |
9114 | && !(h->def_regular | |
9115 | && h->forced_local)) | |
c152c796 AM |
9116 | { |
9117 | /* If we have a non-hidden versioned sym, then it should | |
d023c380 L |
9118 | have provided a definition for the undefined sym unless |
9119 | it is defined in a non-shared object and forced local. | |
9120 | */ | |
c152c796 AM |
9121 | abort (); |
9122 | } | |
9123 | ||
9124 | version_index = iver.vs_vers & VERSYM_VERSION; | |
9125 | if (version_index == 1 || version_index == 2) | |
9126 | { | |
9127 | /* This is the base or first version. We can use it. */ | |
9128 | free (extversym); | |
9129 | free (isymbuf); | |
9130 | return TRUE; | |
9131 | } | |
9132 | } | |
9133 | ||
9134 | free (extversym); | |
9135 | free (isymbuf); | |
9136 | } | |
9137 | ||
9138 | return FALSE; | |
9139 | } | |
9140 | ||
b8871f35 L |
9141 | /* Convert ELF common symbol TYPE. */ |
9142 | ||
9143 | static int | |
9144 | elf_link_convert_common_type (struct bfd_link_info *info, int type) | |
9145 | { | |
9146 | /* Commom symbol can only appear in relocatable link. */ | |
9147 | if (!bfd_link_relocatable (info)) | |
9148 | abort (); | |
9149 | switch (info->elf_stt_common) | |
9150 | { | |
9151 | case unchanged: | |
9152 | break; | |
9153 | case elf_stt_common: | |
9154 | type = STT_COMMON; | |
9155 | break; | |
9156 | case no_elf_stt_common: | |
9157 | type = STT_OBJECT; | |
9158 | break; | |
9159 | } | |
9160 | return type; | |
9161 | } | |
9162 | ||
c152c796 AM |
9163 | /* Add an external symbol to the symbol table. This is called from |
9164 | the hash table traversal routine. When generating a shared object, | |
9165 | we go through the symbol table twice. The first time we output | |
9166 | anything that might have been forced to local scope in a version | |
9167 | script. The second time we output the symbols that are still | |
9168 | global symbols. */ | |
9169 | ||
9170 | static bfd_boolean | |
7686d77d | 9171 | elf_link_output_extsym (struct bfd_hash_entry *bh, void *data) |
c152c796 | 9172 | { |
7686d77d | 9173 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; |
a50b1753 | 9174 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; |
8b127cbc | 9175 | struct elf_final_link_info *flinfo = eoinfo->flinfo; |
c152c796 AM |
9176 | bfd_boolean strip; |
9177 | Elf_Internal_Sym sym; | |
9178 | asection *input_sec; | |
9179 | const struct elf_backend_data *bed; | |
6e0b88f1 AM |
9180 | long indx; |
9181 | int ret; | |
b8871f35 | 9182 | unsigned int type; |
6e33951e L |
9183 | /* A symbol is bound locally if it is forced local or it is locally |
9184 | defined, hidden versioned, not referenced by shared library and | |
9185 | not exported when linking executable. */ | |
9186 | bfd_boolean local_bind = (h->forced_local | |
0e1862bb | 9187 | || (bfd_link_executable (flinfo->info) |
6e33951e L |
9188 | && !flinfo->info->export_dynamic |
9189 | && !h->dynamic | |
9190 | && !h->ref_dynamic | |
9191 | && h->def_regular | |
422f1182 | 9192 | && h->versioned == versioned_hidden)); |
c152c796 AM |
9193 | |
9194 | if (h->root.type == bfd_link_hash_warning) | |
9195 | { | |
9196 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9197 | if (h->root.type == bfd_link_hash_new) | |
9198 | return TRUE; | |
9199 | } | |
9200 | ||
9201 | /* Decide whether to output this symbol in this pass. */ | |
9202 | if (eoinfo->localsyms) | |
9203 | { | |
6e33951e | 9204 | if (!local_bind) |
c152c796 AM |
9205 | return TRUE; |
9206 | } | |
9207 | else | |
9208 | { | |
6e33951e | 9209 | if (local_bind) |
c152c796 AM |
9210 | return TRUE; |
9211 | } | |
9212 | ||
8b127cbc | 9213 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 | 9214 | |
12ac1cf5 | 9215 | if (h->root.type == bfd_link_hash_undefined) |
c152c796 | 9216 | { |
12ac1cf5 NC |
9217 | /* If we have an undefined symbol reference here then it must have |
9218 | come from a shared library that is being linked in. (Undefined | |
98da7939 L |
9219 | references in regular files have already been handled unless |
9220 | they are in unreferenced sections which are removed by garbage | |
9221 | collection). */ | |
12ac1cf5 NC |
9222 | bfd_boolean ignore_undef = FALSE; |
9223 | ||
9224 | /* Some symbols may be special in that the fact that they're | |
9225 | undefined can be safely ignored - let backend determine that. */ | |
9226 | if (bed->elf_backend_ignore_undef_symbol) | |
9227 | ignore_undef = bed->elf_backend_ignore_undef_symbol (h); | |
9228 | ||
9229 | /* If we are reporting errors for this situation then do so now. */ | |
89a2ee5a | 9230 | if (!ignore_undef |
12ac1cf5 | 9231 | && h->ref_dynamic |
8b127cbc AM |
9232 | && (!h->ref_regular || flinfo->info->gc_sections) |
9233 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h) | |
9234 | && flinfo->info->unresolved_syms_in_shared_libs != RM_IGNORE) | |
1a72702b AM |
9235 | (*flinfo->info->callbacks->undefined_symbol) |
9236 | (flinfo->info, h->root.root.string, | |
9237 | h->ref_regular ? NULL : h->root.u.undef.abfd, | |
9238 | NULL, 0, | |
9239 | flinfo->info->unresolved_syms_in_shared_libs == RM_GENERATE_ERROR); | |
97196564 L |
9240 | |
9241 | /* Strip a global symbol defined in a discarded section. */ | |
9242 | if (h->indx == -3) | |
9243 | return TRUE; | |
c152c796 AM |
9244 | } |
9245 | ||
9246 | /* We should also warn if a forced local symbol is referenced from | |
9247 | shared libraries. */ | |
0e1862bb | 9248 | if (bfd_link_executable (flinfo->info) |
f5385ebf AM |
9249 | && h->forced_local |
9250 | && h->ref_dynamic | |
371a5866 | 9251 | && h->def_regular |
f5385ebf | 9252 | && !h->dynamic_def |
ee659f1f | 9253 | && h->ref_dynamic_nonweak |
8b127cbc | 9254 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h)) |
c152c796 | 9255 | { |
17d078c5 AM |
9256 | bfd *def_bfd; |
9257 | const char *msg; | |
90c984fc L |
9258 | struct elf_link_hash_entry *hi = h; |
9259 | ||
9260 | /* Check indirect symbol. */ | |
9261 | while (hi->root.type == bfd_link_hash_indirect) | |
9262 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
17d078c5 AM |
9263 | |
9264 | if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
9265 | msg = _("%B: internal symbol `%s' in %B is referenced by DSO"); | |
9266 | else if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) | |
9267 | msg = _("%B: hidden symbol `%s' in %B is referenced by DSO"); | |
9268 | else | |
9269 | msg = _("%B: local symbol `%s' in %B is referenced by DSO"); | |
8b127cbc | 9270 | def_bfd = flinfo->output_bfd; |
90c984fc L |
9271 | if (hi->root.u.def.section != bfd_abs_section_ptr) |
9272 | def_bfd = hi->root.u.def.section->owner; | |
8b127cbc | 9273 | (*_bfd_error_handler) (msg, flinfo->output_bfd, def_bfd, |
17d078c5 AM |
9274 | h->root.root.string); |
9275 | bfd_set_error (bfd_error_bad_value); | |
c152c796 AM |
9276 | eoinfo->failed = TRUE; |
9277 | return FALSE; | |
9278 | } | |
9279 | ||
9280 | /* We don't want to output symbols that have never been mentioned by | |
9281 | a regular file, or that we have been told to strip. However, if | |
9282 | h->indx is set to -2, the symbol is used by a reloc and we must | |
9283 | output it. */ | |
d983c8c5 | 9284 | strip = FALSE; |
c152c796 | 9285 | if (h->indx == -2) |
d983c8c5 | 9286 | ; |
f5385ebf | 9287 | else if ((h->def_dynamic |
77cfaee6 AM |
9288 | || h->ref_dynamic |
9289 | || h->root.type == bfd_link_hash_new) | |
f5385ebf AM |
9290 | && !h->def_regular |
9291 | && !h->ref_regular) | |
c152c796 | 9292 | strip = TRUE; |
8b127cbc | 9293 | else if (flinfo->info->strip == strip_all) |
c152c796 | 9294 | strip = TRUE; |
8b127cbc AM |
9295 | else if (flinfo->info->strip == strip_some |
9296 | && bfd_hash_lookup (flinfo->info->keep_hash, | |
c152c796 AM |
9297 | h->root.root.string, FALSE, FALSE) == NULL) |
9298 | strip = TRUE; | |
d56d55e7 AM |
9299 | else if ((h->root.type == bfd_link_hash_defined |
9300 | || h->root.type == bfd_link_hash_defweak) | |
8b127cbc | 9301 | && ((flinfo->info->strip_discarded |
dbaa2011 | 9302 | && discarded_section (h->root.u.def.section)) |
ca4be51c AM |
9303 | || ((h->root.u.def.section->flags & SEC_LINKER_CREATED) == 0 |
9304 | && h->root.u.def.section->owner != NULL | |
d56d55e7 | 9305 | && (h->root.u.def.section->owner->flags & BFD_PLUGIN) != 0))) |
c152c796 | 9306 | strip = TRUE; |
9e2278f5 AM |
9307 | else if ((h->root.type == bfd_link_hash_undefined |
9308 | || h->root.type == bfd_link_hash_undefweak) | |
9309 | && h->root.u.undef.abfd != NULL | |
9310 | && (h->root.u.undef.abfd->flags & BFD_PLUGIN) != 0) | |
9311 | strip = TRUE; | |
c152c796 | 9312 | |
b8871f35 L |
9313 | type = h->type; |
9314 | ||
c152c796 | 9315 | /* If we're stripping it, and it's not a dynamic symbol, there's |
d983c8c5 AM |
9316 | nothing else to do. However, if it is a forced local symbol or |
9317 | an ifunc symbol we need to give the backend finish_dynamic_symbol | |
9318 | function a chance to make it dynamic. */ | |
c152c796 AM |
9319 | if (strip |
9320 | && h->dynindx == -1 | |
b8871f35 | 9321 | && type != STT_GNU_IFUNC |
f5385ebf | 9322 | && !h->forced_local) |
c152c796 AM |
9323 | return TRUE; |
9324 | ||
9325 | sym.st_value = 0; | |
9326 | sym.st_size = h->size; | |
9327 | sym.st_other = h->other; | |
c152c796 AM |
9328 | switch (h->root.type) |
9329 | { | |
9330 | default: | |
9331 | case bfd_link_hash_new: | |
9332 | case bfd_link_hash_warning: | |
9333 | abort (); | |
9334 | return FALSE; | |
9335 | ||
9336 | case bfd_link_hash_undefined: | |
9337 | case bfd_link_hash_undefweak: | |
9338 | input_sec = bfd_und_section_ptr; | |
9339 | sym.st_shndx = SHN_UNDEF; | |
9340 | break; | |
9341 | ||
9342 | case bfd_link_hash_defined: | |
9343 | case bfd_link_hash_defweak: | |
9344 | { | |
9345 | input_sec = h->root.u.def.section; | |
9346 | if (input_sec->output_section != NULL) | |
9347 | { | |
9348 | sym.st_shndx = | |
8b127cbc | 9349 | _bfd_elf_section_from_bfd_section (flinfo->output_bfd, |
c152c796 AM |
9350 | input_sec->output_section); |
9351 | if (sym.st_shndx == SHN_BAD) | |
9352 | { | |
9353 | (*_bfd_error_handler) | |
d003868e | 9354 | (_("%B: could not find output section %A for input section %A"), |
8b127cbc | 9355 | flinfo->output_bfd, input_sec->output_section, input_sec); |
17d078c5 | 9356 | bfd_set_error (bfd_error_nonrepresentable_section); |
c152c796 AM |
9357 | eoinfo->failed = TRUE; |
9358 | return FALSE; | |
9359 | } | |
9360 | ||
9361 | /* ELF symbols in relocatable files are section relative, | |
9362 | but in nonrelocatable files they are virtual | |
9363 | addresses. */ | |
9364 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
0e1862bb | 9365 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
9366 | { |
9367 | sym.st_value += input_sec->output_section->vma; | |
9368 | if (h->type == STT_TLS) | |
9369 | { | |
8b127cbc | 9370 | asection *tls_sec = elf_hash_table (flinfo->info)->tls_sec; |
430a16a5 NC |
9371 | if (tls_sec != NULL) |
9372 | sym.st_value -= tls_sec->vma; | |
c152c796 AM |
9373 | } |
9374 | } | |
9375 | } | |
9376 | else | |
9377 | { | |
9378 | BFD_ASSERT (input_sec->owner == NULL | |
9379 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
9380 | sym.st_shndx = SHN_UNDEF; | |
9381 | input_sec = bfd_und_section_ptr; | |
9382 | } | |
9383 | } | |
9384 | break; | |
9385 | ||
9386 | case bfd_link_hash_common: | |
9387 | input_sec = h->root.u.c.p->section; | |
a4d8e49b | 9388 | sym.st_shndx = bed->common_section_index (input_sec); |
c152c796 AM |
9389 | sym.st_value = 1 << h->root.u.c.p->alignment_power; |
9390 | break; | |
9391 | ||
9392 | case bfd_link_hash_indirect: | |
9393 | /* These symbols are created by symbol versioning. They point | |
9394 | to the decorated version of the name. For example, if the | |
9395 | symbol foo@@GNU_1.2 is the default, which should be used when | |
9396 | foo is used with no version, then we add an indirect symbol | |
9397 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
9398 | since the indirected symbol is already in the hash table. */ | |
9399 | return TRUE; | |
9400 | } | |
9401 | ||
b8871f35 L |
9402 | if (type == STT_COMMON || type == STT_OBJECT) |
9403 | switch (h->root.type) | |
9404 | { | |
9405 | case bfd_link_hash_common: | |
9406 | type = elf_link_convert_common_type (flinfo->info, type); | |
9407 | break; | |
9408 | case bfd_link_hash_defined: | |
9409 | case bfd_link_hash_defweak: | |
9410 | if (bed->common_definition (&sym)) | |
9411 | type = elf_link_convert_common_type (flinfo->info, type); | |
9412 | else | |
9413 | type = STT_OBJECT; | |
9414 | break; | |
9415 | case bfd_link_hash_undefined: | |
9416 | case bfd_link_hash_undefweak: | |
9417 | break; | |
9418 | default: | |
9419 | abort (); | |
9420 | } | |
9421 | ||
9422 | if (local_bind) | |
9423 | { | |
9424 | sym.st_info = ELF_ST_INFO (STB_LOCAL, type); | |
9425 | /* Turn off visibility on local symbol. */ | |
9426 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); | |
9427 | } | |
9428 | /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */ | |
9429 | else if (h->unique_global && h->def_regular) | |
9430 | sym.st_info = ELF_ST_INFO (STB_GNU_UNIQUE, type); | |
9431 | else if (h->root.type == bfd_link_hash_undefweak | |
9432 | || h->root.type == bfd_link_hash_defweak) | |
9433 | sym.st_info = ELF_ST_INFO (STB_WEAK, type); | |
9434 | else | |
9435 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, type); | |
9436 | sym.st_target_internal = h->target_internal; | |
9437 | ||
c152c796 AM |
9438 | /* Give the processor backend a chance to tweak the symbol value, |
9439 | and also to finish up anything that needs to be done for this | |
9440 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for | |
3aa14d16 | 9441 | forced local syms when non-shared is due to a historical quirk. |
5f35ea9c | 9442 | STT_GNU_IFUNC symbol must go through PLT. */ |
3aa14d16 | 9443 | if ((h->type == STT_GNU_IFUNC |
5f35ea9c | 9444 | && h->def_regular |
0e1862bb | 9445 | && !bfd_link_relocatable (flinfo->info)) |
3aa14d16 L |
9446 | || ((h->dynindx != -1 |
9447 | || h->forced_local) | |
0e1862bb | 9448 | && ((bfd_link_pic (flinfo->info) |
3aa14d16 L |
9449 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
9450 | || h->root.type != bfd_link_hash_undefweak)) | |
9451 | || !h->forced_local) | |
8b127cbc | 9452 | && elf_hash_table (flinfo->info)->dynamic_sections_created)) |
c152c796 AM |
9453 | { |
9454 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
8b127cbc | 9455 | (flinfo->output_bfd, flinfo->info, h, &sym))) |
c152c796 AM |
9456 | { |
9457 | eoinfo->failed = TRUE; | |
9458 | return FALSE; | |
9459 | } | |
9460 | } | |
9461 | ||
9462 | /* If we are marking the symbol as undefined, and there are no | |
9463 | non-weak references to this symbol from a regular object, then | |
9464 | mark the symbol as weak undefined; if there are non-weak | |
9465 | references, mark the symbol as strong. We can't do this earlier, | |
9466 | because it might not be marked as undefined until the | |
9467 | finish_dynamic_symbol routine gets through with it. */ | |
9468 | if (sym.st_shndx == SHN_UNDEF | |
f5385ebf | 9469 | && h->ref_regular |
c152c796 AM |
9470 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
9471 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
9472 | { | |
9473 | int bindtype; | |
b8871f35 | 9474 | type = ELF_ST_TYPE (sym.st_info); |
2955ec4c L |
9475 | |
9476 | /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */ | |
9477 | if (type == STT_GNU_IFUNC) | |
9478 | type = STT_FUNC; | |
c152c796 | 9479 | |
f5385ebf | 9480 | if (h->ref_regular_nonweak) |
c152c796 AM |
9481 | bindtype = STB_GLOBAL; |
9482 | else | |
9483 | bindtype = STB_WEAK; | |
2955ec4c | 9484 | sym.st_info = ELF_ST_INFO (bindtype, type); |
c152c796 AM |
9485 | } |
9486 | ||
bda987c2 CD |
9487 | /* If this is a symbol defined in a dynamic library, don't use the |
9488 | symbol size from the dynamic library. Relinking an executable | |
9489 | against a new library may introduce gratuitous changes in the | |
9490 | executable's symbols if we keep the size. */ | |
9491 | if (sym.st_shndx == SHN_UNDEF | |
9492 | && !h->def_regular | |
9493 | && h->def_dynamic) | |
9494 | sym.st_size = 0; | |
9495 | ||
c152c796 AM |
9496 | /* If a non-weak symbol with non-default visibility is not defined |
9497 | locally, it is a fatal error. */ | |
0e1862bb | 9498 | if (!bfd_link_relocatable (flinfo->info) |
c152c796 AM |
9499 | && ELF_ST_VISIBILITY (sym.st_other) != STV_DEFAULT |
9500 | && ELF_ST_BIND (sym.st_info) != STB_WEAK | |
9501 | && h->root.type == bfd_link_hash_undefined | |
f5385ebf | 9502 | && !h->def_regular) |
c152c796 | 9503 | { |
17d078c5 AM |
9504 | const char *msg; |
9505 | ||
9506 | if (ELF_ST_VISIBILITY (sym.st_other) == STV_PROTECTED) | |
9507 | msg = _("%B: protected symbol `%s' isn't defined"); | |
9508 | else if (ELF_ST_VISIBILITY (sym.st_other) == STV_INTERNAL) | |
9509 | msg = _("%B: internal symbol `%s' isn't defined"); | |
9510 | else | |
9511 | msg = _("%B: hidden symbol `%s' isn't defined"); | |
8b127cbc | 9512 | (*_bfd_error_handler) (msg, flinfo->output_bfd, h->root.root.string); |
17d078c5 | 9513 | bfd_set_error (bfd_error_bad_value); |
c152c796 AM |
9514 | eoinfo->failed = TRUE; |
9515 | return FALSE; | |
9516 | } | |
9517 | ||
9518 | /* If this symbol should be put in the .dynsym section, then put it | |
9519 | there now. We already know the symbol index. We also fill in | |
9520 | the entry in the .hash section. */ | |
cae1fbbb | 9521 | if (elf_hash_table (flinfo->info)->dynsym != NULL |
202e2356 | 9522 | && h->dynindx != -1 |
8b127cbc | 9523 | && elf_hash_table (flinfo->info)->dynamic_sections_created) |
c152c796 | 9524 | { |
c152c796 AM |
9525 | bfd_byte *esym; |
9526 | ||
90c984fc L |
9527 | /* Since there is no version information in the dynamic string, |
9528 | if there is no version info in symbol version section, we will | |
1659f720 | 9529 | have a run-time problem if not linking executable, referenced |
6e33951e L |
9530 | by shared library, not locally defined, or not bound locally. |
9531 | */ | |
1659f720 | 9532 | if (h->verinfo.verdef == NULL |
6e33951e | 9533 | && !local_bind |
0e1862bb | 9534 | && (!bfd_link_executable (flinfo->info) |
1659f720 L |
9535 | || h->ref_dynamic |
9536 | || !h->def_regular)) | |
90c984fc L |
9537 | { |
9538 | char *p = strrchr (h->root.root.string, ELF_VER_CHR); | |
9539 | ||
9540 | if (p && p [1] != '\0') | |
9541 | { | |
9542 | (*_bfd_error_handler) | |
9543 | (_("%B: No symbol version section for versioned symbol `%s'"), | |
9544 | flinfo->output_bfd, h->root.root.string); | |
9545 | eoinfo->failed = TRUE; | |
9546 | return FALSE; | |
9547 | } | |
9548 | } | |
9549 | ||
c152c796 | 9550 | sym.st_name = h->dynstr_index; |
cae1fbbb L |
9551 | esym = (elf_hash_table (flinfo->info)->dynsym->contents |
9552 | + h->dynindx * bed->s->sizeof_sym); | |
8b127cbc | 9553 | if (!check_dynsym (flinfo->output_bfd, &sym)) |
c0d5a53d L |
9554 | { |
9555 | eoinfo->failed = TRUE; | |
9556 | return FALSE; | |
9557 | } | |
8b127cbc | 9558 | bed->s->swap_symbol_out (flinfo->output_bfd, &sym, esym, 0); |
c152c796 | 9559 | |
8b127cbc | 9560 | if (flinfo->hash_sec != NULL) |
fdc90cb4 JJ |
9561 | { |
9562 | size_t hash_entry_size; | |
9563 | bfd_byte *bucketpos; | |
9564 | bfd_vma chain; | |
41198d0c L |
9565 | size_t bucketcount; |
9566 | size_t bucket; | |
9567 | ||
8b127cbc | 9568 | bucketcount = elf_hash_table (flinfo->info)->bucketcount; |
41198d0c | 9569 | bucket = h->u.elf_hash_value % bucketcount; |
fdc90cb4 JJ |
9570 | |
9571 | hash_entry_size | |
8b127cbc AM |
9572 | = elf_section_data (flinfo->hash_sec)->this_hdr.sh_entsize; |
9573 | bucketpos = ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 | 9574 | + (bucket + 2) * hash_entry_size); |
8b127cbc AM |
9575 | chain = bfd_get (8 * hash_entry_size, flinfo->output_bfd, bucketpos); |
9576 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, h->dynindx, | |
9577 | bucketpos); | |
9578 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, chain, | |
9579 | ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 JJ |
9580 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); |
9581 | } | |
c152c796 | 9582 | |
8b127cbc | 9583 | if (flinfo->symver_sec != NULL && flinfo->symver_sec->contents != NULL) |
c152c796 AM |
9584 | { |
9585 | Elf_Internal_Versym iversym; | |
9586 | Elf_External_Versym *eversym; | |
9587 | ||
f5385ebf | 9588 | if (!h->def_regular) |
c152c796 | 9589 | { |
7b20f099 AM |
9590 | if (h->verinfo.verdef == NULL |
9591 | || (elf_dyn_lib_class (h->verinfo.verdef->vd_bfd) | |
9592 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | DYN_NO_NEEDED))) | |
c152c796 AM |
9593 | iversym.vs_vers = 0; |
9594 | else | |
9595 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
9596 | } | |
9597 | else | |
9598 | { | |
9599 | if (h->verinfo.vertree == NULL) | |
9600 | iversym.vs_vers = 1; | |
9601 | else | |
9602 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
8b127cbc | 9603 | if (flinfo->info->create_default_symver) |
3e3b46e5 | 9604 | iversym.vs_vers++; |
c152c796 AM |
9605 | } |
9606 | ||
422f1182 | 9607 | /* Turn on VERSYM_HIDDEN only if the hidden versioned symbol is |
6e33951e | 9608 | defined locally. */ |
422f1182 | 9609 | if (h->versioned == versioned_hidden && h->def_regular) |
c152c796 AM |
9610 | iversym.vs_vers |= VERSYM_HIDDEN; |
9611 | ||
8b127cbc | 9612 | eversym = (Elf_External_Versym *) flinfo->symver_sec->contents; |
c152c796 | 9613 | eversym += h->dynindx; |
8b127cbc | 9614 | _bfd_elf_swap_versym_out (flinfo->output_bfd, &iversym, eversym); |
c152c796 AM |
9615 | } |
9616 | } | |
9617 | ||
d983c8c5 AM |
9618 | /* If the symbol is undefined, and we didn't output it to .dynsym, |
9619 | strip it from .symtab too. Obviously we can't do this for | |
9620 | relocatable output or when needed for --emit-relocs. */ | |
9621 | else if (input_sec == bfd_und_section_ptr | |
9622 | && h->indx != -2 | |
0e1862bb | 9623 | && !bfd_link_relocatable (flinfo->info)) |
d983c8c5 AM |
9624 | return TRUE; |
9625 | /* Also strip others that we couldn't earlier due to dynamic symbol | |
9626 | processing. */ | |
9627 | if (strip) | |
9628 | return TRUE; | |
9629 | if ((input_sec->flags & SEC_EXCLUDE) != 0) | |
c152c796 AM |
9630 | return TRUE; |
9631 | ||
2ec55de3 AM |
9632 | /* Output a FILE symbol so that following locals are not associated |
9633 | with the wrong input file. We need one for forced local symbols | |
9634 | if we've seen more than one FILE symbol or when we have exactly | |
9635 | one FILE symbol but global symbols are present in a file other | |
9636 | than the one with the FILE symbol. We also need one if linker | |
9637 | defined symbols are present. In practice these conditions are | |
9638 | always met, so just emit the FILE symbol unconditionally. */ | |
9639 | if (eoinfo->localsyms | |
9640 | && !eoinfo->file_sym_done | |
9641 | && eoinfo->flinfo->filesym_count != 0) | |
9642 | { | |
9643 | Elf_Internal_Sym fsym; | |
9644 | ||
9645 | memset (&fsym, 0, sizeof (fsym)); | |
9646 | fsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
9647 | fsym.st_shndx = SHN_ABS; | |
ef10c3ac L |
9648 | if (!elf_link_output_symstrtab (eoinfo->flinfo, NULL, &fsym, |
9649 | bfd_und_section_ptr, NULL)) | |
2ec55de3 AM |
9650 | return FALSE; |
9651 | ||
9652 | eoinfo->file_sym_done = TRUE; | |
9653 | } | |
9654 | ||
8b127cbc | 9655 | indx = bfd_get_symcount (flinfo->output_bfd); |
ef10c3ac L |
9656 | ret = elf_link_output_symstrtab (flinfo, h->root.root.string, &sym, |
9657 | input_sec, h); | |
6e0b88f1 | 9658 | if (ret == 0) |
c152c796 AM |
9659 | { |
9660 | eoinfo->failed = TRUE; | |
9661 | return FALSE; | |
9662 | } | |
6e0b88f1 AM |
9663 | else if (ret == 1) |
9664 | h->indx = indx; | |
9665 | else if (h->indx == -2) | |
9666 | abort(); | |
c152c796 AM |
9667 | |
9668 | return TRUE; | |
9669 | } | |
9670 | ||
cdd3575c AM |
9671 | /* Return TRUE if special handling is done for relocs in SEC against |
9672 | symbols defined in discarded sections. */ | |
9673 | ||
c152c796 AM |
9674 | static bfd_boolean |
9675 | elf_section_ignore_discarded_relocs (asection *sec) | |
9676 | { | |
9677 | const struct elf_backend_data *bed; | |
9678 | ||
cdd3575c AM |
9679 | switch (sec->sec_info_type) |
9680 | { | |
dbaa2011 AM |
9681 | case SEC_INFO_TYPE_STABS: |
9682 | case SEC_INFO_TYPE_EH_FRAME: | |
2f0c68f2 | 9683 | case SEC_INFO_TYPE_EH_FRAME_ENTRY: |
cdd3575c AM |
9684 | return TRUE; |
9685 | default: | |
9686 | break; | |
9687 | } | |
c152c796 AM |
9688 | |
9689 | bed = get_elf_backend_data (sec->owner); | |
9690 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
9691 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
9692 | return TRUE; | |
9693 | ||
9694 | return FALSE; | |
9695 | } | |
9696 | ||
9e66c942 AM |
9697 | /* Return a mask saying how ld should treat relocations in SEC against |
9698 | symbols defined in discarded sections. If this function returns | |
9699 | COMPLAIN set, ld will issue a warning message. If this function | |
9700 | returns PRETEND set, and the discarded section was link-once and the | |
9701 | same size as the kept link-once section, ld will pretend that the | |
9702 | symbol was actually defined in the kept section. Otherwise ld will | |
9703 | zero the reloc (at least that is the intent, but some cooperation by | |
9704 | the target dependent code is needed, particularly for REL targets). */ | |
9705 | ||
8a696751 AM |
9706 | unsigned int |
9707 | _bfd_elf_default_action_discarded (asection *sec) | |
cdd3575c | 9708 | { |
9e66c942 | 9709 | if (sec->flags & SEC_DEBUGGING) |
69d54b1b | 9710 | return PRETEND; |
cdd3575c AM |
9711 | |
9712 | if (strcmp (".eh_frame", sec->name) == 0) | |
9e66c942 | 9713 | return 0; |
cdd3575c AM |
9714 | |
9715 | if (strcmp (".gcc_except_table", sec->name) == 0) | |
9e66c942 | 9716 | return 0; |
cdd3575c | 9717 | |
9e66c942 | 9718 | return COMPLAIN | PRETEND; |
cdd3575c AM |
9719 | } |
9720 | ||
3d7f7666 L |
9721 | /* Find a match between a section and a member of a section group. */ |
9722 | ||
9723 | static asection * | |
c0f00686 L |
9724 | match_group_member (asection *sec, asection *group, |
9725 | struct bfd_link_info *info) | |
3d7f7666 L |
9726 | { |
9727 | asection *first = elf_next_in_group (group); | |
9728 | asection *s = first; | |
9729 | ||
9730 | while (s != NULL) | |
9731 | { | |
c0f00686 | 9732 | if (bfd_elf_match_symbols_in_sections (s, sec, info)) |
3d7f7666 L |
9733 | return s; |
9734 | ||
83180ade | 9735 | s = elf_next_in_group (s); |
3d7f7666 L |
9736 | if (s == first) |
9737 | break; | |
9738 | } | |
9739 | ||
9740 | return NULL; | |
9741 | } | |
9742 | ||
01b3c8ab | 9743 | /* Check if the kept section of a discarded section SEC can be used |
c2370991 AM |
9744 | to replace it. Return the replacement if it is OK. Otherwise return |
9745 | NULL. */ | |
01b3c8ab L |
9746 | |
9747 | asection * | |
c0f00686 | 9748 | _bfd_elf_check_kept_section (asection *sec, struct bfd_link_info *info) |
01b3c8ab L |
9749 | { |
9750 | asection *kept; | |
9751 | ||
9752 | kept = sec->kept_section; | |
9753 | if (kept != NULL) | |
9754 | { | |
c2370991 | 9755 | if ((kept->flags & SEC_GROUP) != 0) |
c0f00686 | 9756 | kept = match_group_member (sec, kept, info); |
1dd2625f BW |
9757 | if (kept != NULL |
9758 | && ((sec->rawsize != 0 ? sec->rawsize : sec->size) | |
9759 | != (kept->rawsize != 0 ? kept->rawsize : kept->size))) | |
01b3c8ab | 9760 | kept = NULL; |
c2370991 | 9761 | sec->kept_section = kept; |
01b3c8ab L |
9762 | } |
9763 | return kept; | |
9764 | } | |
9765 | ||
c152c796 AM |
9766 | /* Link an input file into the linker output file. This function |
9767 | handles all the sections and relocations of the input file at once. | |
9768 | This is so that we only have to read the local symbols once, and | |
9769 | don't have to keep them in memory. */ | |
9770 | ||
9771 | static bfd_boolean | |
8b127cbc | 9772 | elf_link_input_bfd (struct elf_final_link_info *flinfo, bfd *input_bfd) |
c152c796 | 9773 | { |
ece5ef60 | 9774 | int (*relocate_section) |
c152c796 AM |
9775 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
9776 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); | |
9777 | bfd *output_bfd; | |
9778 | Elf_Internal_Shdr *symtab_hdr; | |
9779 | size_t locsymcount; | |
9780 | size_t extsymoff; | |
9781 | Elf_Internal_Sym *isymbuf; | |
9782 | Elf_Internal_Sym *isym; | |
9783 | Elf_Internal_Sym *isymend; | |
9784 | long *pindex; | |
9785 | asection **ppsection; | |
9786 | asection *o; | |
9787 | const struct elf_backend_data *bed; | |
c152c796 | 9788 | struct elf_link_hash_entry **sym_hashes; |
310fd250 L |
9789 | bfd_size_type address_size; |
9790 | bfd_vma r_type_mask; | |
9791 | int r_sym_shift; | |
ffbc01cc | 9792 | bfd_boolean have_file_sym = FALSE; |
c152c796 | 9793 | |
8b127cbc | 9794 | output_bfd = flinfo->output_bfd; |
c152c796 AM |
9795 | bed = get_elf_backend_data (output_bfd); |
9796 | relocate_section = bed->elf_backend_relocate_section; | |
9797 | ||
9798 | /* If this is a dynamic object, we don't want to do anything here: | |
9799 | we don't want the local symbols, and we don't want the section | |
9800 | contents. */ | |
9801 | if ((input_bfd->flags & DYNAMIC) != 0) | |
9802 | return TRUE; | |
9803 | ||
c152c796 AM |
9804 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
9805 | if (elf_bad_symtab (input_bfd)) | |
9806 | { | |
9807 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
9808 | extsymoff = 0; | |
9809 | } | |
9810 | else | |
9811 | { | |
9812 | locsymcount = symtab_hdr->sh_info; | |
9813 | extsymoff = symtab_hdr->sh_info; | |
9814 | } | |
9815 | ||
9816 | /* Read the local symbols. */ | |
9817 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
9818 | if (isymbuf == NULL && locsymcount != 0) | |
9819 | { | |
9820 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
8b127cbc AM |
9821 | flinfo->internal_syms, |
9822 | flinfo->external_syms, | |
9823 | flinfo->locsym_shndx); | |
c152c796 AM |
9824 | if (isymbuf == NULL) |
9825 | return FALSE; | |
9826 | } | |
9827 | ||
9828 | /* Find local symbol sections and adjust values of symbols in | |
9829 | SEC_MERGE sections. Write out those local symbols we know are | |
9830 | going into the output file. */ | |
9831 | isymend = isymbuf + locsymcount; | |
8b127cbc | 9832 | for (isym = isymbuf, pindex = flinfo->indices, ppsection = flinfo->sections; |
c152c796 AM |
9833 | isym < isymend; |
9834 | isym++, pindex++, ppsection++) | |
9835 | { | |
9836 | asection *isec; | |
9837 | const char *name; | |
9838 | Elf_Internal_Sym osym; | |
6e0b88f1 AM |
9839 | long indx; |
9840 | int ret; | |
c152c796 AM |
9841 | |
9842 | *pindex = -1; | |
9843 | ||
9844 | if (elf_bad_symtab (input_bfd)) | |
9845 | { | |
9846 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
9847 | { | |
9848 | *ppsection = NULL; | |
9849 | continue; | |
9850 | } | |
9851 | } | |
9852 | ||
9853 | if (isym->st_shndx == SHN_UNDEF) | |
9854 | isec = bfd_und_section_ptr; | |
c152c796 AM |
9855 | else if (isym->st_shndx == SHN_ABS) |
9856 | isec = bfd_abs_section_ptr; | |
9857 | else if (isym->st_shndx == SHN_COMMON) | |
9858 | isec = bfd_com_section_ptr; | |
9859 | else | |
9860 | { | |
cb33740c AM |
9861 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
9862 | if (isec == NULL) | |
9863 | { | |
9864 | /* Don't attempt to output symbols with st_shnx in the | |
9865 | reserved range other than SHN_ABS and SHN_COMMON. */ | |
9866 | *ppsection = NULL; | |
9867 | continue; | |
9868 | } | |
dbaa2011 | 9869 | else if (isec->sec_info_type == SEC_INFO_TYPE_MERGE |
cb33740c AM |
9870 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
9871 | isym->st_value = | |
9872 | _bfd_merged_section_offset (output_bfd, &isec, | |
9873 | elf_section_data (isec)->sec_info, | |
9874 | isym->st_value); | |
c152c796 AM |
9875 | } |
9876 | ||
9877 | *ppsection = isec; | |
9878 | ||
d983c8c5 AM |
9879 | /* Don't output the first, undefined, symbol. In fact, don't |
9880 | output any undefined local symbol. */ | |
9881 | if (isec == bfd_und_section_ptr) | |
c152c796 AM |
9882 | continue; |
9883 | ||
9884 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
9885 | { | |
9886 | /* We never output section symbols. Instead, we use the | |
9887 | section symbol of the corresponding section in the output | |
9888 | file. */ | |
9889 | continue; | |
9890 | } | |
9891 | ||
9892 | /* If we are stripping all symbols, we don't want to output this | |
9893 | one. */ | |
8b127cbc | 9894 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
9895 | continue; |
9896 | ||
9897 | /* If we are discarding all local symbols, we don't want to | |
9898 | output this one. If we are generating a relocatable output | |
9899 | file, then some of the local symbols may be required by | |
9900 | relocs; we output them below as we discover that they are | |
9901 | needed. */ | |
8b127cbc | 9902 | if (flinfo->info->discard == discard_all) |
c152c796 AM |
9903 | continue; |
9904 | ||
9905 | /* If this symbol is defined in a section which we are | |
f02571c5 AM |
9906 | discarding, we don't need to keep it. */ |
9907 | if (isym->st_shndx != SHN_UNDEF | |
4fbb74a6 AM |
9908 | && isym->st_shndx < SHN_LORESERVE |
9909 | && bfd_section_removed_from_list (output_bfd, | |
9910 | isec->output_section)) | |
e75a280b L |
9911 | continue; |
9912 | ||
c152c796 AM |
9913 | /* Get the name of the symbol. */ |
9914 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
9915 | isym->st_name); | |
9916 | if (name == NULL) | |
9917 | return FALSE; | |
9918 | ||
9919 | /* See if we are discarding symbols with this name. */ | |
8b127cbc AM |
9920 | if ((flinfo->info->strip == strip_some |
9921 | && (bfd_hash_lookup (flinfo->info->keep_hash, name, FALSE, FALSE) | |
c152c796 | 9922 | == NULL)) |
8b127cbc | 9923 | || (((flinfo->info->discard == discard_sec_merge |
0e1862bb L |
9924 | && (isec->flags & SEC_MERGE) |
9925 | && !bfd_link_relocatable (flinfo->info)) | |
8b127cbc | 9926 | || flinfo->info->discard == discard_l) |
c152c796 AM |
9927 | && bfd_is_local_label_name (input_bfd, name))) |
9928 | continue; | |
9929 | ||
ffbc01cc AM |
9930 | if (ELF_ST_TYPE (isym->st_info) == STT_FILE) |
9931 | { | |
ce875075 AM |
9932 | if (input_bfd->lto_output) |
9933 | /* -flto puts a temp file name here. This means builds | |
9934 | are not reproducible. Discard the symbol. */ | |
9935 | continue; | |
ffbc01cc AM |
9936 | have_file_sym = TRUE; |
9937 | flinfo->filesym_count += 1; | |
9938 | } | |
9939 | if (!have_file_sym) | |
9940 | { | |
9941 | /* In the absence of debug info, bfd_find_nearest_line uses | |
9942 | FILE symbols to determine the source file for local | |
9943 | function symbols. Provide a FILE symbol here if input | |
9944 | files lack such, so that their symbols won't be | |
9945 | associated with a previous input file. It's not the | |
9946 | source file, but the best we can do. */ | |
9947 | have_file_sym = TRUE; | |
9948 | flinfo->filesym_count += 1; | |
9949 | memset (&osym, 0, sizeof (osym)); | |
9950 | osym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
9951 | osym.st_shndx = SHN_ABS; | |
ef10c3ac L |
9952 | if (!elf_link_output_symstrtab (flinfo, |
9953 | (input_bfd->lto_output ? NULL | |
9954 | : input_bfd->filename), | |
9955 | &osym, bfd_abs_section_ptr, | |
9956 | NULL)) | |
ffbc01cc AM |
9957 | return FALSE; |
9958 | } | |
9959 | ||
c152c796 AM |
9960 | osym = *isym; |
9961 | ||
9962 | /* Adjust the section index for the output file. */ | |
9963 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
9964 | isec->output_section); | |
9965 | if (osym.st_shndx == SHN_BAD) | |
9966 | return FALSE; | |
9967 | ||
c152c796 AM |
9968 | /* ELF symbols in relocatable files are section relative, but |
9969 | in executable files they are virtual addresses. Note that | |
9970 | this code assumes that all ELF sections have an associated | |
9971 | BFD section with a reasonable value for output_offset; below | |
9972 | we assume that they also have a reasonable value for | |
9973 | output_section. Any special sections must be set up to meet | |
9974 | these requirements. */ | |
9975 | osym.st_value += isec->output_offset; | |
0e1862bb | 9976 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
9977 | { |
9978 | osym.st_value += isec->output_section->vma; | |
9979 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
9980 | { | |
9981 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
8b127cbc AM |
9982 | BFD_ASSERT (elf_hash_table (flinfo->info)->tls_sec != NULL); |
9983 | osym.st_value -= elf_hash_table (flinfo->info)->tls_sec->vma; | |
c152c796 AM |
9984 | } |
9985 | } | |
9986 | ||
6e0b88f1 | 9987 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac | 9988 | ret = elf_link_output_symstrtab (flinfo, name, &osym, isec, NULL); |
6e0b88f1 | 9989 | if (ret == 0) |
c152c796 | 9990 | return FALSE; |
6e0b88f1 AM |
9991 | else if (ret == 1) |
9992 | *pindex = indx; | |
c152c796 AM |
9993 | } |
9994 | ||
310fd250 L |
9995 | if (bed->s->arch_size == 32) |
9996 | { | |
9997 | r_type_mask = 0xff; | |
9998 | r_sym_shift = 8; | |
9999 | address_size = 4; | |
10000 | } | |
10001 | else | |
10002 | { | |
10003 | r_type_mask = 0xffffffff; | |
10004 | r_sym_shift = 32; | |
10005 | address_size = 8; | |
10006 | } | |
10007 | ||
c152c796 AM |
10008 | /* Relocate the contents of each section. */ |
10009 | sym_hashes = elf_sym_hashes (input_bfd); | |
10010 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
10011 | { | |
10012 | bfd_byte *contents; | |
10013 | ||
10014 | if (! o->linker_mark) | |
10015 | { | |
10016 | /* This section was omitted from the link. */ | |
10017 | continue; | |
10018 | } | |
10019 | ||
0e1862bb | 10020 | if (bfd_link_relocatable (flinfo->info) |
bcacc0f5 AM |
10021 | && (o->flags & (SEC_LINKER_CREATED | SEC_GROUP)) == SEC_GROUP) |
10022 | { | |
10023 | /* Deal with the group signature symbol. */ | |
10024 | struct bfd_elf_section_data *sec_data = elf_section_data (o); | |
10025 | unsigned long symndx = sec_data->this_hdr.sh_info; | |
10026 | asection *osec = o->output_section; | |
10027 | ||
10028 | if (symndx >= locsymcount | |
10029 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 10030 | && flinfo->sections[symndx] == NULL)) |
bcacc0f5 AM |
10031 | { |
10032 | struct elf_link_hash_entry *h = sym_hashes[symndx - extsymoff]; | |
10033 | while (h->root.type == bfd_link_hash_indirect | |
10034 | || h->root.type == bfd_link_hash_warning) | |
10035 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10036 | /* Arrange for symbol to be output. */ | |
10037 | h->indx = -2; | |
10038 | elf_section_data (osec)->this_hdr.sh_info = -2; | |
10039 | } | |
10040 | else if (ELF_ST_TYPE (isymbuf[symndx].st_info) == STT_SECTION) | |
10041 | { | |
10042 | /* We'll use the output section target_index. */ | |
8b127cbc | 10043 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 AM |
10044 | elf_section_data (osec)->this_hdr.sh_info = sec->target_index; |
10045 | } | |
10046 | else | |
10047 | { | |
8b127cbc | 10048 | if (flinfo->indices[symndx] == -1) |
bcacc0f5 AM |
10049 | { |
10050 | /* Otherwise output the local symbol now. */ | |
10051 | Elf_Internal_Sym sym = isymbuf[symndx]; | |
8b127cbc | 10052 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 | 10053 | const char *name; |
6e0b88f1 AM |
10054 | long indx; |
10055 | int ret; | |
bcacc0f5 AM |
10056 | |
10057 | name = bfd_elf_string_from_elf_section (input_bfd, | |
10058 | symtab_hdr->sh_link, | |
10059 | sym.st_name); | |
10060 | if (name == NULL) | |
10061 | return FALSE; | |
10062 | ||
10063 | sym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
10064 | sec); | |
10065 | if (sym.st_shndx == SHN_BAD) | |
10066 | return FALSE; | |
10067 | ||
10068 | sym.st_value += o->output_offset; | |
10069 | ||
6e0b88f1 | 10070 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac L |
10071 | ret = elf_link_output_symstrtab (flinfo, name, &sym, o, |
10072 | NULL); | |
6e0b88f1 | 10073 | if (ret == 0) |
bcacc0f5 | 10074 | return FALSE; |
6e0b88f1 | 10075 | else if (ret == 1) |
8b127cbc | 10076 | flinfo->indices[symndx] = indx; |
6e0b88f1 AM |
10077 | else |
10078 | abort (); | |
bcacc0f5 AM |
10079 | } |
10080 | elf_section_data (osec)->this_hdr.sh_info | |
8b127cbc | 10081 | = flinfo->indices[symndx]; |
bcacc0f5 AM |
10082 | } |
10083 | } | |
10084 | ||
c152c796 | 10085 | if ((o->flags & SEC_HAS_CONTENTS) == 0 |
eea6121a | 10086 | || (o->size == 0 && (o->flags & SEC_RELOC) == 0)) |
c152c796 AM |
10087 | continue; |
10088 | ||
10089 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
10090 | { | |
10091 | /* Section was created by _bfd_elf_link_create_dynamic_sections | |
10092 | or somesuch. */ | |
10093 | continue; | |
10094 | } | |
10095 | ||
10096 | /* Get the contents of the section. They have been cached by a | |
10097 | relaxation routine. Note that o is a section in an input | |
10098 | file, so the contents field will not have been set by any of | |
10099 | the routines which work on output files. */ | |
10100 | if (elf_section_data (o)->this_hdr.contents != NULL) | |
53291d1f AM |
10101 | { |
10102 | contents = elf_section_data (o)->this_hdr.contents; | |
10103 | if (bed->caches_rawsize | |
10104 | && o->rawsize != 0 | |
10105 | && o->rawsize < o->size) | |
10106 | { | |
10107 | memcpy (flinfo->contents, contents, o->rawsize); | |
10108 | contents = flinfo->contents; | |
10109 | } | |
10110 | } | |
c152c796 AM |
10111 | else |
10112 | { | |
8b127cbc | 10113 | contents = flinfo->contents; |
4a114e3e | 10114 | if (! bfd_get_full_section_contents (input_bfd, o, &contents)) |
c152c796 AM |
10115 | return FALSE; |
10116 | } | |
10117 | ||
10118 | if ((o->flags & SEC_RELOC) != 0) | |
10119 | { | |
10120 | Elf_Internal_Rela *internal_relocs; | |
0f02bbd9 | 10121 | Elf_Internal_Rela *rel, *relend; |
0f02bbd9 | 10122 | int action_discarded; |
ece5ef60 | 10123 | int ret; |
c152c796 AM |
10124 | |
10125 | /* Get the swapped relocs. */ | |
10126 | internal_relocs | |
8b127cbc AM |
10127 | = _bfd_elf_link_read_relocs (input_bfd, o, flinfo->external_relocs, |
10128 | flinfo->internal_relocs, FALSE); | |
c152c796 AM |
10129 | if (internal_relocs == NULL |
10130 | && o->reloc_count > 0) | |
10131 | return FALSE; | |
10132 | ||
310fd250 L |
10133 | /* We need to reverse-copy input .ctors/.dtors sections if |
10134 | they are placed in .init_array/.finit_array for output. */ | |
10135 | if (o->size > address_size | |
10136 | && ((strncmp (o->name, ".ctors", 6) == 0 | |
10137 | && strcmp (o->output_section->name, | |
10138 | ".init_array") == 0) | |
10139 | || (strncmp (o->name, ".dtors", 6) == 0 | |
10140 | && strcmp (o->output_section->name, | |
10141 | ".fini_array") == 0)) | |
10142 | && (o->name[6] == 0 || o->name[6] == '.')) | |
c152c796 | 10143 | { |
310fd250 L |
10144 | if (o->size != o->reloc_count * address_size) |
10145 | { | |
10146 | (*_bfd_error_handler) | |
10147 | (_("error: %B: size of section %A is not " | |
10148 | "multiple of address size"), | |
10149 | input_bfd, o); | |
10150 | bfd_set_error (bfd_error_on_input); | |
10151 | return FALSE; | |
10152 | } | |
10153 | o->flags |= SEC_ELF_REVERSE_COPY; | |
c152c796 AM |
10154 | } |
10155 | ||
0f02bbd9 | 10156 | action_discarded = -1; |
c152c796 | 10157 | if (!elf_section_ignore_discarded_relocs (o)) |
0f02bbd9 AM |
10158 | action_discarded = (*bed->action_discarded) (o); |
10159 | ||
10160 | /* Run through the relocs evaluating complex reloc symbols and | |
10161 | looking for relocs against symbols from discarded sections | |
10162 | or section symbols from removed link-once sections. | |
10163 | Complain about relocs against discarded sections. Zero | |
10164 | relocs against removed link-once sections. */ | |
10165 | ||
10166 | rel = internal_relocs; | |
10167 | relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
10168 | for ( ; rel < relend; rel++) | |
c152c796 | 10169 | { |
0f02bbd9 AM |
10170 | unsigned long r_symndx = rel->r_info >> r_sym_shift; |
10171 | unsigned int s_type; | |
10172 | asection **ps, *sec; | |
10173 | struct elf_link_hash_entry *h = NULL; | |
10174 | const char *sym_name; | |
c152c796 | 10175 | |
0f02bbd9 AM |
10176 | if (r_symndx == STN_UNDEF) |
10177 | continue; | |
c152c796 | 10178 | |
0f02bbd9 AM |
10179 | if (r_symndx >= locsymcount |
10180 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 10181 | && flinfo->sections[r_symndx] == NULL)) |
0f02bbd9 AM |
10182 | { |
10183 | h = sym_hashes[r_symndx - extsymoff]; | |
ee75fd95 | 10184 | |
0f02bbd9 AM |
10185 | /* Badly formatted input files can contain relocs that |
10186 | reference non-existant symbols. Check here so that | |
10187 | we do not seg fault. */ | |
10188 | if (h == NULL) | |
c152c796 | 10189 | { |
0f02bbd9 | 10190 | char buffer [32]; |
dce669a1 | 10191 | |
0f02bbd9 AM |
10192 | sprintf_vma (buffer, rel->r_info); |
10193 | (*_bfd_error_handler) | |
10194 | (_("error: %B contains a reloc (0x%s) for section %A " | |
10195 | "that references a non-existent global symbol"), | |
10196 | input_bfd, o, buffer); | |
10197 | bfd_set_error (bfd_error_bad_value); | |
10198 | return FALSE; | |
10199 | } | |
3b36f7e6 | 10200 | |
0f02bbd9 AM |
10201 | while (h->root.type == bfd_link_hash_indirect |
10202 | || h->root.type == bfd_link_hash_warning) | |
10203 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c152c796 | 10204 | |
0f02bbd9 | 10205 | s_type = h->type; |
cdd3575c | 10206 | |
9e2dec47 | 10207 | /* If a plugin symbol is referenced from a non-IR file, |
ca4be51c AM |
10208 | mark the symbol as undefined. Note that the |
10209 | linker may attach linker created dynamic sections | |
10210 | to the plugin bfd. Symbols defined in linker | |
10211 | created sections are not plugin symbols. */ | |
9e2dec47 L |
10212 | if (h->root.non_ir_ref |
10213 | && (h->root.type == bfd_link_hash_defined | |
10214 | || h->root.type == bfd_link_hash_defweak) | |
10215 | && (h->root.u.def.section->flags | |
10216 | & SEC_LINKER_CREATED) == 0 | |
10217 | && h->root.u.def.section->owner != NULL | |
10218 | && (h->root.u.def.section->owner->flags | |
10219 | & BFD_PLUGIN) != 0) | |
10220 | { | |
10221 | h->root.type = bfd_link_hash_undefined; | |
10222 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
10223 | } | |
10224 | ||
0f02bbd9 AM |
10225 | ps = NULL; |
10226 | if (h->root.type == bfd_link_hash_defined | |
10227 | || h->root.type == bfd_link_hash_defweak) | |
10228 | ps = &h->root.u.def.section; | |
10229 | ||
10230 | sym_name = h->root.root.string; | |
10231 | } | |
10232 | else | |
10233 | { | |
10234 | Elf_Internal_Sym *sym = isymbuf + r_symndx; | |
10235 | ||
10236 | s_type = ELF_ST_TYPE (sym->st_info); | |
8b127cbc | 10237 | ps = &flinfo->sections[r_symndx]; |
0f02bbd9 AM |
10238 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, |
10239 | sym, *ps); | |
10240 | } | |
c152c796 | 10241 | |
c301e700 | 10242 | if ((s_type == STT_RELC || s_type == STT_SRELC) |
0e1862bb | 10243 | && !bfd_link_relocatable (flinfo->info)) |
0f02bbd9 AM |
10244 | { |
10245 | bfd_vma val; | |
10246 | bfd_vma dot = (rel->r_offset | |
10247 | + o->output_offset + o->output_section->vma); | |
10248 | #ifdef DEBUG | |
10249 | printf ("Encountered a complex symbol!"); | |
10250 | printf (" (input_bfd %s, section %s, reloc %ld\n", | |
9ccb8af9 AM |
10251 | input_bfd->filename, o->name, |
10252 | (long) (rel - internal_relocs)); | |
0f02bbd9 AM |
10253 | printf (" symbol: idx %8.8lx, name %s\n", |
10254 | r_symndx, sym_name); | |
10255 | printf (" reloc : info %8.8lx, addr %8.8lx\n", | |
10256 | (unsigned long) rel->r_info, | |
10257 | (unsigned long) rel->r_offset); | |
10258 | #endif | |
8b127cbc | 10259 | if (!eval_symbol (&val, &sym_name, input_bfd, flinfo, dot, |
0f02bbd9 AM |
10260 | isymbuf, locsymcount, s_type == STT_SRELC)) |
10261 | return FALSE; | |
10262 | ||
10263 | /* Symbol evaluated OK. Update to absolute value. */ | |
10264 | set_symbol_value (input_bfd, isymbuf, locsymcount, | |
10265 | r_symndx, val); | |
10266 | continue; | |
10267 | } | |
10268 | ||
10269 | if (action_discarded != -1 && ps != NULL) | |
10270 | { | |
cdd3575c AM |
10271 | /* Complain if the definition comes from a |
10272 | discarded section. */ | |
dbaa2011 | 10273 | if ((sec = *ps) != NULL && discarded_section (sec)) |
cdd3575c | 10274 | { |
cf35638d | 10275 | BFD_ASSERT (r_symndx != STN_UNDEF); |
0f02bbd9 | 10276 | if (action_discarded & COMPLAIN) |
8b127cbc | 10277 | (*flinfo->info->callbacks->einfo) |
e1fffbe6 | 10278 | (_("%X`%s' referenced in section `%A' of %B: " |
58ac56d0 | 10279 | "defined in discarded section `%A' of %B\n"), |
e1fffbe6 | 10280 | sym_name, o, input_bfd, sec, sec->owner); |
cdd3575c | 10281 | |
87e5235d | 10282 | /* Try to do the best we can to support buggy old |
e0ae6d6f | 10283 | versions of gcc. Pretend that the symbol is |
87e5235d AM |
10284 | really defined in the kept linkonce section. |
10285 | FIXME: This is quite broken. Modifying the | |
10286 | symbol here means we will be changing all later | |
e0ae6d6f | 10287 | uses of the symbol, not just in this section. */ |
0f02bbd9 | 10288 | if (action_discarded & PRETEND) |
87e5235d | 10289 | { |
01b3c8ab L |
10290 | asection *kept; |
10291 | ||
c0f00686 | 10292 | kept = _bfd_elf_check_kept_section (sec, |
8b127cbc | 10293 | flinfo->info); |
01b3c8ab | 10294 | if (kept != NULL) |
87e5235d AM |
10295 | { |
10296 | *ps = kept; | |
10297 | continue; | |
10298 | } | |
10299 | } | |
c152c796 AM |
10300 | } |
10301 | } | |
10302 | } | |
10303 | ||
10304 | /* Relocate the section by invoking a back end routine. | |
10305 | ||
10306 | The back end routine is responsible for adjusting the | |
10307 | section contents as necessary, and (if using Rela relocs | |
10308 | and generating a relocatable output file) adjusting the | |
10309 | reloc addend as necessary. | |
10310 | ||
10311 | The back end routine does not have to worry about setting | |
10312 | the reloc address or the reloc symbol index. | |
10313 | ||
10314 | The back end routine is given a pointer to the swapped in | |
10315 | internal symbols, and can access the hash table entries | |
10316 | for the external symbols via elf_sym_hashes (input_bfd). | |
10317 | ||
10318 | When generating relocatable output, the back end routine | |
10319 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
10320 | output symbol is going to be a section symbol | |
10321 | corresponding to the output section, which will require | |
10322 | the addend to be adjusted. */ | |
10323 | ||
8b127cbc | 10324 | ret = (*relocate_section) (output_bfd, flinfo->info, |
c152c796 AM |
10325 | input_bfd, o, contents, |
10326 | internal_relocs, | |
10327 | isymbuf, | |
8b127cbc | 10328 | flinfo->sections); |
ece5ef60 | 10329 | if (!ret) |
c152c796 AM |
10330 | return FALSE; |
10331 | ||
ece5ef60 | 10332 | if (ret == 2 |
0e1862bb | 10333 | || bfd_link_relocatable (flinfo->info) |
8b127cbc | 10334 | || flinfo->info->emitrelocations) |
c152c796 AM |
10335 | { |
10336 | Elf_Internal_Rela *irela; | |
d4730f92 | 10337 | Elf_Internal_Rela *irelaend, *irelamid; |
c152c796 AM |
10338 | bfd_vma last_offset; |
10339 | struct elf_link_hash_entry **rel_hash; | |
d4730f92 BS |
10340 | struct elf_link_hash_entry **rel_hash_list, **rela_hash_list; |
10341 | Elf_Internal_Shdr *input_rel_hdr, *input_rela_hdr; | |
c152c796 | 10342 | unsigned int next_erel; |
c152c796 | 10343 | bfd_boolean rela_normal; |
d4730f92 | 10344 | struct bfd_elf_section_data *esdi, *esdo; |
c152c796 | 10345 | |
d4730f92 BS |
10346 | esdi = elf_section_data (o); |
10347 | esdo = elf_section_data (o->output_section); | |
10348 | rela_normal = FALSE; | |
c152c796 AM |
10349 | |
10350 | /* Adjust the reloc addresses and symbol indices. */ | |
10351 | ||
10352 | irela = internal_relocs; | |
10353 | irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
d4730f92 BS |
10354 | rel_hash = esdo->rel.hashes + esdo->rel.count; |
10355 | /* We start processing the REL relocs, if any. When we reach | |
10356 | IRELAMID in the loop, we switch to the RELA relocs. */ | |
10357 | irelamid = irela; | |
10358 | if (esdi->rel.hdr != NULL) | |
10359 | irelamid += (NUM_SHDR_ENTRIES (esdi->rel.hdr) | |
10360 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 10361 | rel_hash_list = rel_hash; |
d4730f92 | 10362 | rela_hash_list = NULL; |
c152c796 | 10363 | last_offset = o->output_offset; |
0e1862bb | 10364 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10365 | last_offset += o->output_section->vma; |
10366 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) | |
10367 | { | |
10368 | unsigned long r_symndx; | |
10369 | asection *sec; | |
10370 | Elf_Internal_Sym sym; | |
10371 | ||
10372 | if (next_erel == bed->s->int_rels_per_ext_rel) | |
10373 | { | |
10374 | rel_hash++; | |
10375 | next_erel = 0; | |
10376 | } | |
10377 | ||
d4730f92 BS |
10378 | if (irela == irelamid) |
10379 | { | |
10380 | rel_hash = esdo->rela.hashes + esdo->rela.count; | |
10381 | rela_hash_list = rel_hash; | |
10382 | rela_normal = bed->rela_normal; | |
10383 | } | |
10384 | ||
c152c796 | 10385 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
8b127cbc | 10386 | flinfo->info, o, |
c152c796 AM |
10387 | irela->r_offset); |
10388 | if (irela->r_offset >= (bfd_vma) -2) | |
10389 | { | |
10390 | /* This is a reloc for a deleted entry or somesuch. | |
10391 | Turn it into an R_*_NONE reloc, at the same | |
10392 | offset as the last reloc. elf_eh_frame.c and | |
e460dd0d | 10393 | bfd_elf_discard_info rely on reloc offsets |
c152c796 AM |
10394 | being ordered. */ |
10395 | irela->r_offset = last_offset; | |
10396 | irela->r_info = 0; | |
10397 | irela->r_addend = 0; | |
10398 | continue; | |
10399 | } | |
10400 | ||
10401 | irela->r_offset += o->output_offset; | |
10402 | ||
10403 | /* Relocs in an executable have to be virtual addresses. */ | |
0e1862bb | 10404 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10405 | irela->r_offset += o->output_section->vma; |
10406 | ||
10407 | last_offset = irela->r_offset; | |
10408 | ||
10409 | r_symndx = irela->r_info >> r_sym_shift; | |
10410 | if (r_symndx == STN_UNDEF) | |
10411 | continue; | |
10412 | ||
10413 | if (r_symndx >= locsymcount | |
10414 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 10415 | && flinfo->sections[r_symndx] == NULL)) |
c152c796 AM |
10416 | { |
10417 | struct elf_link_hash_entry *rh; | |
10418 | unsigned long indx; | |
10419 | ||
10420 | /* This is a reloc against a global symbol. We | |
10421 | have not yet output all the local symbols, so | |
10422 | we do not know the symbol index of any global | |
10423 | symbol. We set the rel_hash entry for this | |
10424 | reloc to point to the global hash table entry | |
10425 | for this symbol. The symbol index is then | |
ee75fd95 | 10426 | set at the end of bfd_elf_final_link. */ |
c152c796 AM |
10427 | indx = r_symndx - extsymoff; |
10428 | rh = elf_sym_hashes (input_bfd)[indx]; | |
10429 | while (rh->root.type == bfd_link_hash_indirect | |
10430 | || rh->root.type == bfd_link_hash_warning) | |
10431 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
10432 | ||
10433 | /* Setting the index to -2 tells | |
10434 | elf_link_output_extsym that this symbol is | |
10435 | used by a reloc. */ | |
10436 | BFD_ASSERT (rh->indx < 0); | |
10437 | rh->indx = -2; | |
10438 | ||
10439 | *rel_hash = rh; | |
10440 | ||
10441 | continue; | |
10442 | } | |
10443 | ||
10444 | /* This is a reloc against a local symbol. */ | |
10445 | ||
10446 | *rel_hash = NULL; | |
10447 | sym = isymbuf[r_symndx]; | |
8b127cbc | 10448 | sec = flinfo->sections[r_symndx]; |
c152c796 AM |
10449 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
10450 | { | |
10451 | /* I suppose the backend ought to fill in the | |
10452 | section of any STT_SECTION symbol against a | |
6a8d1586 | 10453 | processor specific section. */ |
cf35638d | 10454 | r_symndx = STN_UNDEF; |
6a8d1586 AM |
10455 | if (bfd_is_abs_section (sec)) |
10456 | ; | |
c152c796 AM |
10457 | else if (sec == NULL || sec->owner == NULL) |
10458 | { | |
10459 | bfd_set_error (bfd_error_bad_value); | |
10460 | return FALSE; | |
10461 | } | |
10462 | else | |
10463 | { | |
6a8d1586 AM |
10464 | asection *osec = sec->output_section; |
10465 | ||
10466 | /* If we have discarded a section, the output | |
10467 | section will be the absolute section. In | |
ab96bf03 AM |
10468 | case of discarded SEC_MERGE sections, use |
10469 | the kept section. relocate_section should | |
10470 | have already handled discarded linkonce | |
10471 | sections. */ | |
6a8d1586 AM |
10472 | if (bfd_is_abs_section (osec) |
10473 | && sec->kept_section != NULL | |
10474 | && sec->kept_section->output_section != NULL) | |
10475 | { | |
10476 | osec = sec->kept_section->output_section; | |
10477 | irela->r_addend -= osec->vma; | |
10478 | } | |
10479 | ||
10480 | if (!bfd_is_abs_section (osec)) | |
10481 | { | |
10482 | r_symndx = osec->target_index; | |
cf35638d | 10483 | if (r_symndx == STN_UNDEF) |
74541ad4 | 10484 | { |
051d833a AM |
10485 | irela->r_addend += osec->vma; |
10486 | osec = _bfd_nearby_section (output_bfd, osec, | |
10487 | osec->vma); | |
10488 | irela->r_addend -= osec->vma; | |
10489 | r_symndx = osec->target_index; | |
74541ad4 | 10490 | } |
6a8d1586 | 10491 | } |
c152c796 AM |
10492 | } |
10493 | ||
10494 | /* Adjust the addend according to where the | |
10495 | section winds up in the output section. */ | |
10496 | if (rela_normal) | |
10497 | irela->r_addend += sec->output_offset; | |
10498 | } | |
10499 | else | |
10500 | { | |
8b127cbc | 10501 | if (flinfo->indices[r_symndx] == -1) |
c152c796 AM |
10502 | { |
10503 | unsigned long shlink; | |
10504 | const char *name; | |
10505 | asection *osec; | |
6e0b88f1 | 10506 | long indx; |
c152c796 | 10507 | |
8b127cbc | 10508 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
10509 | { |
10510 | /* You can't do ld -r -s. */ | |
10511 | bfd_set_error (bfd_error_invalid_operation); | |
10512 | return FALSE; | |
10513 | } | |
10514 | ||
10515 | /* This symbol was skipped earlier, but | |
10516 | since it is needed by a reloc, we | |
10517 | must output it now. */ | |
10518 | shlink = symtab_hdr->sh_link; | |
10519 | name = (bfd_elf_string_from_elf_section | |
10520 | (input_bfd, shlink, sym.st_name)); | |
10521 | if (name == NULL) | |
10522 | return FALSE; | |
10523 | ||
10524 | osec = sec->output_section; | |
10525 | sym.st_shndx = | |
10526 | _bfd_elf_section_from_bfd_section (output_bfd, | |
10527 | osec); | |
10528 | if (sym.st_shndx == SHN_BAD) | |
10529 | return FALSE; | |
10530 | ||
10531 | sym.st_value += sec->output_offset; | |
0e1862bb | 10532 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10533 | { |
10534 | sym.st_value += osec->vma; | |
10535 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
10536 | { | |
10537 | /* STT_TLS symbols are relative to PT_TLS | |
10538 | segment base. */ | |
8b127cbc | 10539 | BFD_ASSERT (elf_hash_table (flinfo->info) |
c152c796 | 10540 | ->tls_sec != NULL); |
8b127cbc | 10541 | sym.st_value -= (elf_hash_table (flinfo->info) |
c152c796 AM |
10542 | ->tls_sec->vma); |
10543 | } | |
10544 | } | |
10545 | ||
6e0b88f1 | 10546 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac L |
10547 | ret = elf_link_output_symstrtab (flinfo, name, |
10548 | &sym, sec, | |
10549 | NULL); | |
6e0b88f1 | 10550 | if (ret == 0) |
c152c796 | 10551 | return FALSE; |
6e0b88f1 | 10552 | else if (ret == 1) |
8b127cbc | 10553 | flinfo->indices[r_symndx] = indx; |
6e0b88f1 AM |
10554 | else |
10555 | abort (); | |
c152c796 AM |
10556 | } |
10557 | ||
8b127cbc | 10558 | r_symndx = flinfo->indices[r_symndx]; |
c152c796 AM |
10559 | } |
10560 | ||
10561 | irela->r_info = ((bfd_vma) r_symndx << r_sym_shift | |
10562 | | (irela->r_info & r_type_mask)); | |
10563 | } | |
10564 | ||
10565 | /* Swap out the relocs. */ | |
d4730f92 BS |
10566 | input_rel_hdr = esdi->rel.hdr; |
10567 | if (input_rel_hdr && input_rel_hdr->sh_size != 0) | |
c152c796 | 10568 | { |
d4730f92 BS |
10569 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
10570 | input_rel_hdr, | |
10571 | internal_relocs, | |
10572 | rel_hash_list)) | |
10573 | return FALSE; | |
c152c796 AM |
10574 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) |
10575 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 10576 | rel_hash_list += NUM_SHDR_ENTRIES (input_rel_hdr); |
d4730f92 BS |
10577 | } |
10578 | ||
10579 | input_rela_hdr = esdi->rela.hdr; | |
10580 | if (input_rela_hdr && input_rela_hdr->sh_size != 0) | |
10581 | { | |
eac338cf | 10582 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
d4730f92 | 10583 | input_rela_hdr, |
eac338cf | 10584 | internal_relocs, |
d4730f92 | 10585 | rela_hash_list)) |
c152c796 AM |
10586 | return FALSE; |
10587 | } | |
10588 | } | |
10589 | } | |
10590 | ||
10591 | /* Write out the modified section contents. */ | |
10592 | if (bed->elf_backend_write_section | |
8b127cbc | 10593 | && (*bed->elf_backend_write_section) (output_bfd, flinfo->info, o, |
c7b8f16e | 10594 | contents)) |
c152c796 AM |
10595 | { |
10596 | /* Section written out. */ | |
10597 | } | |
10598 | else switch (o->sec_info_type) | |
10599 | { | |
dbaa2011 | 10600 | case SEC_INFO_TYPE_STABS: |
c152c796 AM |
10601 | if (! (_bfd_write_section_stabs |
10602 | (output_bfd, | |
8b127cbc | 10603 | &elf_hash_table (flinfo->info)->stab_info, |
c152c796 AM |
10604 | o, &elf_section_data (o)->sec_info, contents))) |
10605 | return FALSE; | |
10606 | break; | |
dbaa2011 | 10607 | case SEC_INFO_TYPE_MERGE: |
c152c796 AM |
10608 | if (! _bfd_write_merged_section (output_bfd, o, |
10609 | elf_section_data (o)->sec_info)) | |
10610 | return FALSE; | |
10611 | break; | |
dbaa2011 | 10612 | case SEC_INFO_TYPE_EH_FRAME: |
c152c796 | 10613 | { |
8b127cbc | 10614 | if (! _bfd_elf_write_section_eh_frame (output_bfd, flinfo->info, |
c152c796 AM |
10615 | o, contents)) |
10616 | return FALSE; | |
10617 | } | |
10618 | break; | |
2f0c68f2 CM |
10619 | case SEC_INFO_TYPE_EH_FRAME_ENTRY: |
10620 | { | |
10621 | if (! _bfd_elf_write_section_eh_frame_entry (output_bfd, | |
10622 | flinfo->info, | |
10623 | o, contents)) | |
10624 | return FALSE; | |
10625 | } | |
10626 | break; | |
c152c796 AM |
10627 | default: |
10628 | { | |
310fd250 L |
10629 | if (! (o->flags & SEC_EXCLUDE)) |
10630 | { | |
10631 | file_ptr offset = (file_ptr) o->output_offset; | |
10632 | bfd_size_type todo = o->size; | |
37b01f6a DG |
10633 | |
10634 | offset *= bfd_octets_per_byte (output_bfd); | |
10635 | ||
310fd250 L |
10636 | if ((o->flags & SEC_ELF_REVERSE_COPY)) |
10637 | { | |
10638 | /* Reverse-copy input section to output. */ | |
10639 | do | |
10640 | { | |
10641 | todo -= address_size; | |
10642 | if (! bfd_set_section_contents (output_bfd, | |
10643 | o->output_section, | |
10644 | contents + todo, | |
10645 | offset, | |
10646 | address_size)) | |
10647 | return FALSE; | |
10648 | if (todo == 0) | |
10649 | break; | |
10650 | offset += address_size; | |
10651 | } | |
10652 | while (1); | |
10653 | } | |
10654 | else if (! bfd_set_section_contents (output_bfd, | |
10655 | o->output_section, | |
10656 | contents, | |
10657 | offset, todo)) | |
10658 | return FALSE; | |
10659 | } | |
c152c796 AM |
10660 | } |
10661 | break; | |
10662 | } | |
10663 | } | |
10664 | ||
10665 | return TRUE; | |
10666 | } | |
10667 | ||
10668 | /* Generate a reloc when linking an ELF file. This is a reloc | |
3a800eb9 | 10669 | requested by the linker, and does not come from any input file. This |
c152c796 AM |
10670 | is used to build constructor and destructor tables when linking |
10671 | with -Ur. */ | |
10672 | ||
10673 | static bfd_boolean | |
10674 | elf_reloc_link_order (bfd *output_bfd, | |
10675 | struct bfd_link_info *info, | |
10676 | asection *output_section, | |
10677 | struct bfd_link_order *link_order) | |
10678 | { | |
10679 | reloc_howto_type *howto; | |
10680 | long indx; | |
10681 | bfd_vma offset; | |
10682 | bfd_vma addend; | |
d4730f92 | 10683 | struct bfd_elf_section_reloc_data *reldata; |
c152c796 AM |
10684 | struct elf_link_hash_entry **rel_hash_ptr; |
10685 | Elf_Internal_Shdr *rel_hdr; | |
10686 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
10687 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; | |
10688 | bfd_byte *erel; | |
10689 | unsigned int i; | |
d4730f92 | 10690 | struct bfd_elf_section_data *esdo = elf_section_data (output_section); |
c152c796 AM |
10691 | |
10692 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
10693 | if (howto == NULL) | |
10694 | { | |
10695 | bfd_set_error (bfd_error_bad_value); | |
10696 | return FALSE; | |
10697 | } | |
10698 | ||
10699 | addend = link_order->u.reloc.p->addend; | |
10700 | ||
d4730f92 BS |
10701 | if (esdo->rel.hdr) |
10702 | reldata = &esdo->rel; | |
10703 | else if (esdo->rela.hdr) | |
10704 | reldata = &esdo->rela; | |
10705 | else | |
10706 | { | |
10707 | reldata = NULL; | |
10708 | BFD_ASSERT (0); | |
10709 | } | |
10710 | ||
c152c796 | 10711 | /* Figure out the symbol index. */ |
d4730f92 | 10712 | rel_hash_ptr = reldata->hashes + reldata->count; |
c152c796 AM |
10713 | if (link_order->type == bfd_section_reloc_link_order) |
10714 | { | |
10715 | indx = link_order->u.reloc.p->u.section->target_index; | |
10716 | BFD_ASSERT (indx != 0); | |
10717 | *rel_hash_ptr = NULL; | |
10718 | } | |
10719 | else | |
10720 | { | |
10721 | struct elf_link_hash_entry *h; | |
10722 | ||
10723 | /* Treat a reloc against a defined symbol as though it were | |
10724 | actually against the section. */ | |
10725 | h = ((struct elf_link_hash_entry *) | |
10726 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
10727 | link_order->u.reloc.p->u.name, | |
10728 | FALSE, FALSE, TRUE)); | |
10729 | if (h != NULL | |
10730 | && (h->root.type == bfd_link_hash_defined | |
10731 | || h->root.type == bfd_link_hash_defweak)) | |
10732 | { | |
10733 | asection *section; | |
10734 | ||
10735 | section = h->root.u.def.section; | |
10736 | indx = section->output_section->target_index; | |
10737 | *rel_hash_ptr = NULL; | |
10738 | /* It seems that we ought to add the symbol value to the | |
10739 | addend here, but in practice it has already been added | |
10740 | because it was passed to constructor_callback. */ | |
10741 | addend += section->output_section->vma + section->output_offset; | |
10742 | } | |
10743 | else if (h != NULL) | |
10744 | { | |
10745 | /* Setting the index to -2 tells elf_link_output_extsym that | |
10746 | this symbol is used by a reloc. */ | |
10747 | h->indx = -2; | |
10748 | *rel_hash_ptr = h; | |
10749 | indx = 0; | |
10750 | } | |
10751 | else | |
10752 | { | |
1a72702b AM |
10753 | (*info->callbacks->unattached_reloc) |
10754 | (info, link_order->u.reloc.p->u.name, NULL, NULL, 0); | |
c152c796 AM |
10755 | indx = 0; |
10756 | } | |
10757 | } | |
10758 | ||
10759 | /* If this is an inplace reloc, we must write the addend into the | |
10760 | object file. */ | |
10761 | if (howto->partial_inplace && addend != 0) | |
10762 | { | |
10763 | bfd_size_type size; | |
10764 | bfd_reloc_status_type rstat; | |
10765 | bfd_byte *buf; | |
10766 | bfd_boolean ok; | |
10767 | const char *sym_name; | |
10768 | ||
a50b1753 NC |
10769 | size = (bfd_size_type) bfd_get_reloc_size (howto); |
10770 | buf = (bfd_byte *) bfd_zmalloc (size); | |
6346d5ca | 10771 | if (buf == NULL && size != 0) |
c152c796 AM |
10772 | return FALSE; |
10773 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); | |
10774 | switch (rstat) | |
10775 | { | |
10776 | case bfd_reloc_ok: | |
10777 | break; | |
10778 | ||
10779 | default: | |
10780 | case bfd_reloc_outofrange: | |
10781 | abort (); | |
10782 | ||
10783 | case bfd_reloc_overflow: | |
10784 | if (link_order->type == bfd_section_reloc_link_order) | |
10785 | sym_name = bfd_section_name (output_bfd, | |
10786 | link_order->u.reloc.p->u.section); | |
10787 | else | |
10788 | sym_name = link_order->u.reloc.p->u.name; | |
1a72702b AM |
10789 | (*info->callbacks->reloc_overflow) (info, NULL, sym_name, |
10790 | howto->name, addend, NULL, NULL, | |
10791 | (bfd_vma) 0); | |
c152c796 AM |
10792 | break; |
10793 | } | |
37b01f6a | 10794 | |
c152c796 | 10795 | ok = bfd_set_section_contents (output_bfd, output_section, buf, |
37b01f6a DG |
10796 | link_order->offset |
10797 | * bfd_octets_per_byte (output_bfd), | |
10798 | size); | |
c152c796 AM |
10799 | free (buf); |
10800 | if (! ok) | |
10801 | return FALSE; | |
10802 | } | |
10803 | ||
10804 | /* The address of a reloc is relative to the section in a | |
10805 | relocatable file, and is a virtual address in an executable | |
10806 | file. */ | |
10807 | offset = link_order->offset; | |
0e1862bb | 10808 | if (! bfd_link_relocatable (info)) |
c152c796 AM |
10809 | offset += output_section->vma; |
10810 | ||
10811 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) | |
10812 | { | |
10813 | irel[i].r_offset = offset; | |
10814 | irel[i].r_info = 0; | |
10815 | irel[i].r_addend = 0; | |
10816 | } | |
10817 | if (bed->s->arch_size == 32) | |
10818 | irel[0].r_info = ELF32_R_INFO (indx, howto->type); | |
10819 | else | |
10820 | irel[0].r_info = ELF64_R_INFO (indx, howto->type); | |
10821 | ||
d4730f92 | 10822 | rel_hdr = reldata->hdr; |
c152c796 AM |
10823 | erel = rel_hdr->contents; |
10824 | if (rel_hdr->sh_type == SHT_REL) | |
10825 | { | |
d4730f92 | 10826 | erel += reldata->count * bed->s->sizeof_rel; |
c152c796 AM |
10827 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); |
10828 | } | |
10829 | else | |
10830 | { | |
10831 | irel[0].r_addend = addend; | |
d4730f92 | 10832 | erel += reldata->count * bed->s->sizeof_rela; |
c152c796 AM |
10833 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); |
10834 | } | |
10835 | ||
d4730f92 | 10836 | ++reldata->count; |
c152c796 AM |
10837 | |
10838 | return TRUE; | |
10839 | } | |
10840 | ||
0b52efa6 PB |
10841 | |
10842 | /* Get the output vma of the section pointed to by the sh_link field. */ | |
10843 | ||
10844 | static bfd_vma | |
10845 | elf_get_linked_section_vma (struct bfd_link_order *p) | |
10846 | { | |
10847 | Elf_Internal_Shdr **elf_shdrp; | |
10848 | asection *s; | |
10849 | int elfsec; | |
10850 | ||
10851 | s = p->u.indirect.section; | |
10852 | elf_shdrp = elf_elfsections (s->owner); | |
10853 | elfsec = _bfd_elf_section_from_bfd_section (s->owner, s); | |
10854 | elfsec = elf_shdrp[elfsec]->sh_link; | |
185d09ad L |
10855 | /* PR 290: |
10856 | The Intel C compiler generates SHT_IA_64_UNWIND with | |
e04bcc6d | 10857 | SHF_LINK_ORDER. But it doesn't set the sh_link or |
185d09ad L |
10858 | sh_info fields. Hence we could get the situation |
10859 | where elfsec is 0. */ | |
10860 | if (elfsec == 0) | |
10861 | { | |
10862 | const struct elf_backend_data *bed | |
10863 | = get_elf_backend_data (s->owner); | |
10864 | if (bed->link_order_error_handler) | |
d003868e AM |
10865 | bed->link_order_error_handler |
10866 | (_("%B: warning: sh_link not set for section `%A'"), s->owner, s); | |
185d09ad L |
10867 | return 0; |
10868 | } | |
10869 | else | |
10870 | { | |
10871 | s = elf_shdrp[elfsec]->bfd_section; | |
10872 | return s->output_section->vma + s->output_offset; | |
10873 | } | |
0b52efa6 PB |
10874 | } |
10875 | ||
10876 | ||
10877 | /* Compare two sections based on the locations of the sections they are | |
10878 | linked to. Used by elf_fixup_link_order. */ | |
10879 | ||
10880 | static int | |
10881 | compare_link_order (const void * a, const void * b) | |
10882 | { | |
10883 | bfd_vma apos; | |
10884 | bfd_vma bpos; | |
10885 | ||
10886 | apos = elf_get_linked_section_vma (*(struct bfd_link_order **)a); | |
10887 | bpos = elf_get_linked_section_vma (*(struct bfd_link_order **)b); | |
10888 | if (apos < bpos) | |
10889 | return -1; | |
10890 | return apos > bpos; | |
10891 | } | |
10892 | ||
10893 | ||
10894 | /* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same | |
10895 | order as their linked sections. Returns false if this could not be done | |
10896 | because an output section includes both ordered and unordered | |
10897 | sections. Ideally we'd do this in the linker proper. */ | |
10898 | ||
10899 | static bfd_boolean | |
10900 | elf_fixup_link_order (bfd *abfd, asection *o) | |
10901 | { | |
10902 | int seen_linkorder; | |
10903 | int seen_other; | |
10904 | int n; | |
10905 | struct bfd_link_order *p; | |
10906 | bfd *sub; | |
10907 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
b761a207 | 10908 | unsigned elfsec; |
0b52efa6 | 10909 | struct bfd_link_order **sections; |
d33cdfe3 | 10910 | asection *s, *other_sec, *linkorder_sec; |
0b52efa6 | 10911 | bfd_vma offset; |
3b36f7e6 | 10912 | |
d33cdfe3 L |
10913 | other_sec = NULL; |
10914 | linkorder_sec = NULL; | |
0b52efa6 PB |
10915 | seen_other = 0; |
10916 | seen_linkorder = 0; | |
8423293d | 10917 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
0b52efa6 | 10918 | { |
d33cdfe3 | 10919 | if (p->type == bfd_indirect_link_order) |
0b52efa6 PB |
10920 | { |
10921 | s = p->u.indirect.section; | |
d33cdfe3 L |
10922 | sub = s->owner; |
10923 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour | |
10924 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass | |
b761a207 BE |
10925 | && (elfsec = _bfd_elf_section_from_bfd_section (sub, s)) |
10926 | && elfsec < elf_numsections (sub) | |
4fbb74a6 AM |
10927 | && elf_elfsections (sub)[elfsec]->sh_flags & SHF_LINK_ORDER |
10928 | && elf_elfsections (sub)[elfsec]->sh_link < elf_numsections (sub)) | |
d33cdfe3 L |
10929 | { |
10930 | seen_linkorder++; | |
10931 | linkorder_sec = s; | |
10932 | } | |
0b52efa6 | 10933 | else |
d33cdfe3 L |
10934 | { |
10935 | seen_other++; | |
10936 | other_sec = s; | |
10937 | } | |
0b52efa6 PB |
10938 | } |
10939 | else | |
10940 | seen_other++; | |
d33cdfe3 L |
10941 | |
10942 | if (seen_other && seen_linkorder) | |
10943 | { | |
10944 | if (other_sec && linkorder_sec) | |
10945 | (*_bfd_error_handler) (_("%A has both ordered [`%A' in %B] and unordered [`%A' in %B] sections"), | |
10946 | o, linkorder_sec, | |
10947 | linkorder_sec->owner, other_sec, | |
10948 | other_sec->owner); | |
10949 | else | |
10950 | (*_bfd_error_handler) (_("%A has both ordered and unordered sections"), | |
10951 | o); | |
10952 | bfd_set_error (bfd_error_bad_value); | |
10953 | return FALSE; | |
10954 | } | |
0b52efa6 PB |
10955 | } |
10956 | ||
10957 | if (!seen_linkorder) | |
10958 | return TRUE; | |
10959 | ||
0b52efa6 | 10960 | sections = (struct bfd_link_order **) |
14b1c01e AM |
10961 | bfd_malloc (seen_linkorder * sizeof (struct bfd_link_order *)); |
10962 | if (sections == NULL) | |
10963 | return FALSE; | |
0b52efa6 | 10964 | seen_linkorder = 0; |
3b36f7e6 | 10965 | |
8423293d | 10966 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
0b52efa6 PB |
10967 | { |
10968 | sections[seen_linkorder++] = p; | |
10969 | } | |
10970 | /* Sort the input sections in the order of their linked section. */ | |
10971 | qsort (sections, seen_linkorder, sizeof (struct bfd_link_order *), | |
10972 | compare_link_order); | |
10973 | ||
10974 | /* Change the offsets of the sections. */ | |
10975 | offset = 0; | |
10976 | for (n = 0; n < seen_linkorder; n++) | |
10977 | { | |
10978 | s = sections[n]->u.indirect.section; | |
461686a3 | 10979 | offset &= ~(bfd_vma) 0 << s->alignment_power; |
37b01f6a | 10980 | s->output_offset = offset / bfd_octets_per_byte (abfd); |
0b52efa6 PB |
10981 | sections[n]->offset = offset; |
10982 | offset += sections[n]->size; | |
10983 | } | |
10984 | ||
4dd07732 | 10985 | free (sections); |
0b52efa6 PB |
10986 | return TRUE; |
10987 | } | |
10988 | ||
9f7c3e5e AM |
10989 | static void |
10990 | elf_final_link_free (bfd *obfd, struct elf_final_link_info *flinfo) | |
10991 | { | |
10992 | asection *o; | |
10993 | ||
10994 | if (flinfo->symstrtab != NULL) | |
ef10c3ac | 10995 | _bfd_elf_strtab_free (flinfo->symstrtab); |
9f7c3e5e AM |
10996 | if (flinfo->contents != NULL) |
10997 | free (flinfo->contents); | |
10998 | if (flinfo->external_relocs != NULL) | |
10999 | free (flinfo->external_relocs); | |
11000 | if (flinfo->internal_relocs != NULL) | |
11001 | free (flinfo->internal_relocs); | |
11002 | if (flinfo->external_syms != NULL) | |
11003 | free (flinfo->external_syms); | |
11004 | if (flinfo->locsym_shndx != NULL) | |
11005 | free (flinfo->locsym_shndx); | |
11006 | if (flinfo->internal_syms != NULL) | |
11007 | free (flinfo->internal_syms); | |
11008 | if (flinfo->indices != NULL) | |
11009 | free (flinfo->indices); | |
11010 | if (flinfo->sections != NULL) | |
11011 | free (flinfo->sections); | |
9f7c3e5e AM |
11012 | if (flinfo->symshndxbuf != NULL) |
11013 | free (flinfo->symshndxbuf); | |
11014 | for (o = obfd->sections; o != NULL; o = o->next) | |
11015 | { | |
11016 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
11017 | if ((o->flags & SEC_RELOC) != 0 && esdo->rel.hashes != NULL) | |
11018 | free (esdo->rel.hashes); | |
11019 | if ((o->flags & SEC_RELOC) != 0 && esdo->rela.hashes != NULL) | |
11020 | free (esdo->rela.hashes); | |
11021 | } | |
11022 | } | |
0b52efa6 | 11023 | |
c152c796 AM |
11024 | /* Do the final step of an ELF link. */ |
11025 | ||
11026 | bfd_boolean | |
11027 | bfd_elf_final_link (bfd *abfd, struct bfd_link_info *info) | |
11028 | { | |
11029 | bfd_boolean dynamic; | |
11030 | bfd_boolean emit_relocs; | |
11031 | bfd *dynobj; | |
8b127cbc | 11032 | struct elf_final_link_info flinfo; |
91d6fa6a NC |
11033 | asection *o; |
11034 | struct bfd_link_order *p; | |
11035 | bfd *sub; | |
c152c796 AM |
11036 | bfd_size_type max_contents_size; |
11037 | bfd_size_type max_external_reloc_size; | |
11038 | bfd_size_type max_internal_reloc_count; | |
11039 | bfd_size_type max_sym_count; | |
11040 | bfd_size_type max_sym_shndx_count; | |
c152c796 AM |
11041 | Elf_Internal_Sym elfsym; |
11042 | unsigned int i; | |
11043 | Elf_Internal_Shdr *symtab_hdr; | |
11044 | Elf_Internal_Shdr *symtab_shndx_hdr; | |
c152c796 AM |
11045 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
11046 | struct elf_outext_info eoinfo; | |
11047 | bfd_boolean merged; | |
11048 | size_t relativecount = 0; | |
11049 | asection *reldyn = 0; | |
11050 | bfd_size_type amt; | |
104d59d1 JM |
11051 | asection *attr_section = NULL; |
11052 | bfd_vma attr_size = 0; | |
11053 | const char *std_attrs_section; | |
c152c796 AM |
11054 | |
11055 | if (! is_elf_hash_table (info->hash)) | |
11056 | return FALSE; | |
11057 | ||
0e1862bb | 11058 | if (bfd_link_pic (info)) |
c152c796 AM |
11059 | abfd->flags |= DYNAMIC; |
11060 | ||
11061 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
11062 | dynobj = elf_hash_table (info)->dynobj; | |
11063 | ||
0e1862bb | 11064 | emit_relocs = (bfd_link_relocatable (info) |
a4676736 | 11065 | || info->emitrelocations); |
c152c796 | 11066 | |
8b127cbc AM |
11067 | flinfo.info = info; |
11068 | flinfo.output_bfd = abfd; | |
ef10c3ac | 11069 | flinfo.symstrtab = _bfd_elf_strtab_init (); |
8b127cbc | 11070 | if (flinfo.symstrtab == NULL) |
c152c796 AM |
11071 | return FALSE; |
11072 | ||
11073 | if (! dynamic) | |
11074 | { | |
8b127cbc AM |
11075 | flinfo.hash_sec = NULL; |
11076 | flinfo.symver_sec = NULL; | |
c152c796 AM |
11077 | } |
11078 | else | |
11079 | { | |
3d4d4302 | 11080 | flinfo.hash_sec = bfd_get_linker_section (dynobj, ".hash"); |
202e2356 | 11081 | /* Note that dynsym_sec can be NULL (on VMS). */ |
3d4d4302 | 11082 | flinfo.symver_sec = bfd_get_linker_section (dynobj, ".gnu.version"); |
c152c796 AM |
11083 | /* Note that it is OK if symver_sec is NULL. */ |
11084 | } | |
11085 | ||
8b127cbc AM |
11086 | flinfo.contents = NULL; |
11087 | flinfo.external_relocs = NULL; | |
11088 | flinfo.internal_relocs = NULL; | |
11089 | flinfo.external_syms = NULL; | |
11090 | flinfo.locsym_shndx = NULL; | |
11091 | flinfo.internal_syms = NULL; | |
11092 | flinfo.indices = NULL; | |
11093 | flinfo.sections = NULL; | |
8b127cbc | 11094 | flinfo.symshndxbuf = NULL; |
ffbc01cc | 11095 | flinfo.filesym_count = 0; |
c152c796 | 11096 | |
104d59d1 JM |
11097 | /* The object attributes have been merged. Remove the input |
11098 | sections from the link, and set the contents of the output | |
11099 | secton. */ | |
11100 | std_attrs_section = get_elf_backend_data (abfd)->obj_attrs_section; | |
11101 | for (o = abfd->sections; o != NULL; o = o->next) | |
11102 | { | |
11103 | if ((std_attrs_section && strcmp (o->name, std_attrs_section) == 0) | |
11104 | || strcmp (o->name, ".gnu.attributes") == 0) | |
11105 | { | |
11106 | for (p = o->map_head.link_order; p != NULL; p = p->next) | |
11107 | { | |
11108 | asection *input_section; | |
11109 | ||
11110 | if (p->type != bfd_indirect_link_order) | |
11111 | continue; | |
11112 | input_section = p->u.indirect.section; | |
11113 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
11114 | elf_link_input_bfd ignores this section. */ | |
11115 | input_section->flags &= ~SEC_HAS_CONTENTS; | |
11116 | } | |
a0c8462f | 11117 | |
104d59d1 JM |
11118 | attr_size = bfd_elf_obj_attr_size (abfd); |
11119 | if (attr_size) | |
11120 | { | |
11121 | bfd_set_section_size (abfd, o, attr_size); | |
11122 | attr_section = o; | |
11123 | /* Skip this section later on. */ | |
11124 | o->map_head.link_order = NULL; | |
11125 | } | |
11126 | else | |
11127 | o->flags |= SEC_EXCLUDE; | |
11128 | } | |
11129 | } | |
11130 | ||
c152c796 AM |
11131 | /* Count up the number of relocations we will output for each output |
11132 | section, so that we know the sizes of the reloc sections. We | |
11133 | also figure out some maximum sizes. */ | |
11134 | max_contents_size = 0; | |
11135 | max_external_reloc_size = 0; | |
11136 | max_internal_reloc_count = 0; | |
11137 | max_sym_count = 0; | |
11138 | max_sym_shndx_count = 0; | |
11139 | merged = FALSE; | |
11140 | for (o = abfd->sections; o != NULL; o = o->next) | |
11141 | { | |
11142 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
11143 | o->reloc_count = 0; | |
11144 | ||
8423293d | 11145 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
11146 | { |
11147 | unsigned int reloc_count = 0; | |
491d01d3 | 11148 | unsigned int additional_reloc_count = 0; |
c152c796 | 11149 | struct bfd_elf_section_data *esdi = NULL; |
c152c796 AM |
11150 | |
11151 | if (p->type == bfd_section_reloc_link_order | |
11152 | || p->type == bfd_symbol_reloc_link_order) | |
11153 | reloc_count = 1; | |
11154 | else if (p->type == bfd_indirect_link_order) | |
11155 | { | |
11156 | asection *sec; | |
11157 | ||
11158 | sec = p->u.indirect.section; | |
11159 | esdi = elf_section_data (sec); | |
11160 | ||
11161 | /* Mark all sections which are to be included in the | |
11162 | link. This will normally be every section. We need | |
11163 | to do this so that we can identify any sections which | |
11164 | the linker has decided to not include. */ | |
11165 | sec->linker_mark = TRUE; | |
11166 | ||
11167 | if (sec->flags & SEC_MERGE) | |
11168 | merged = TRUE; | |
11169 | ||
aed64b35 L |
11170 | if (esdo->this_hdr.sh_type == SHT_REL |
11171 | || esdo->this_hdr.sh_type == SHT_RELA) | |
11172 | /* Some backends use reloc_count in relocation sections | |
11173 | to count particular types of relocs. Of course, | |
11174 | reloc sections themselves can't have relocations. */ | |
11175 | reloc_count = 0; | |
0e1862bb | 11176 | else if (emit_relocs) |
491d01d3 YU |
11177 | { |
11178 | reloc_count = sec->reloc_count; | |
11179 | if (bed->elf_backend_count_additional_relocs) | |
11180 | { | |
11181 | int c; | |
11182 | c = (*bed->elf_backend_count_additional_relocs) (sec); | |
11183 | additional_reloc_count += c; | |
11184 | } | |
11185 | } | |
c152c796 | 11186 | else if (bed->elf_backend_count_relocs) |
58217f29 | 11187 | reloc_count = (*bed->elf_backend_count_relocs) (info, sec); |
c152c796 | 11188 | |
eea6121a AM |
11189 | if (sec->rawsize > max_contents_size) |
11190 | max_contents_size = sec->rawsize; | |
11191 | if (sec->size > max_contents_size) | |
11192 | max_contents_size = sec->size; | |
c152c796 AM |
11193 | |
11194 | /* We are interested in just local symbols, not all | |
11195 | symbols. */ | |
11196 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
11197 | && (sec->owner->flags & DYNAMIC) == 0) | |
11198 | { | |
11199 | size_t sym_count; | |
11200 | ||
11201 | if (elf_bad_symtab (sec->owner)) | |
11202 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
11203 | / bed->s->sizeof_sym); | |
11204 | else | |
11205 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
11206 | ||
11207 | if (sym_count > max_sym_count) | |
11208 | max_sym_count = sym_count; | |
11209 | ||
11210 | if (sym_count > max_sym_shndx_count | |
6a40cf0c | 11211 | && elf_symtab_shndx_list (sec->owner) != NULL) |
c152c796 AM |
11212 | max_sym_shndx_count = sym_count; |
11213 | ||
11214 | if ((sec->flags & SEC_RELOC) != 0) | |
11215 | { | |
d4730f92 | 11216 | size_t ext_size = 0; |
c152c796 | 11217 | |
d4730f92 BS |
11218 | if (esdi->rel.hdr != NULL) |
11219 | ext_size = esdi->rel.hdr->sh_size; | |
11220 | if (esdi->rela.hdr != NULL) | |
11221 | ext_size += esdi->rela.hdr->sh_size; | |
7326c758 | 11222 | |
c152c796 AM |
11223 | if (ext_size > max_external_reloc_size) |
11224 | max_external_reloc_size = ext_size; | |
11225 | if (sec->reloc_count > max_internal_reloc_count) | |
11226 | max_internal_reloc_count = sec->reloc_count; | |
11227 | } | |
11228 | } | |
11229 | } | |
11230 | ||
11231 | if (reloc_count == 0) | |
11232 | continue; | |
11233 | ||
491d01d3 | 11234 | reloc_count += additional_reloc_count; |
c152c796 AM |
11235 | o->reloc_count += reloc_count; |
11236 | ||
0e1862bb | 11237 | if (p->type == bfd_indirect_link_order && emit_relocs) |
c152c796 | 11238 | { |
d4730f92 | 11239 | if (esdi->rel.hdr) |
491d01d3 YU |
11240 | { |
11241 | esdo->rel.count += NUM_SHDR_ENTRIES (esdi->rel.hdr); | |
11242 | esdo->rel.count += additional_reloc_count; | |
11243 | } | |
d4730f92 | 11244 | if (esdi->rela.hdr) |
491d01d3 YU |
11245 | { |
11246 | esdo->rela.count += NUM_SHDR_ENTRIES (esdi->rela.hdr); | |
11247 | esdo->rela.count += additional_reloc_count; | |
11248 | } | |
d4730f92 BS |
11249 | } |
11250 | else | |
11251 | { | |
11252 | if (o->use_rela_p) | |
11253 | esdo->rela.count += reloc_count; | |
2c2b4ed4 | 11254 | else |
d4730f92 | 11255 | esdo->rel.count += reloc_count; |
c152c796 | 11256 | } |
c152c796 AM |
11257 | } |
11258 | ||
11259 | if (o->reloc_count > 0) | |
11260 | o->flags |= SEC_RELOC; | |
11261 | else | |
11262 | { | |
11263 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
11264 | set it (this is probably a bug) and if it is set | |
11265 | assign_section_numbers will create a reloc section. */ | |
11266 | o->flags &=~ SEC_RELOC; | |
11267 | } | |
11268 | ||
11269 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
11270 | zero. This is done in elf_fake_sections as well, but forcing | |
11271 | the VMA to 0 here will ensure that relocs against these | |
11272 | sections are handled correctly. */ | |
11273 | if ((o->flags & SEC_ALLOC) == 0 | |
11274 | && ! o->user_set_vma) | |
11275 | o->vma = 0; | |
11276 | } | |
11277 | ||
0e1862bb | 11278 | if (! bfd_link_relocatable (info) && merged) |
c152c796 AM |
11279 | elf_link_hash_traverse (elf_hash_table (info), |
11280 | _bfd_elf_link_sec_merge_syms, abfd); | |
11281 | ||
11282 | /* Figure out the file positions for everything but the symbol table | |
11283 | and the relocs. We set symcount to force assign_section_numbers | |
11284 | to create a symbol table. */ | |
8539e4e8 | 11285 | bfd_get_symcount (abfd) = info->strip != strip_all || emit_relocs; |
c152c796 AM |
11286 | BFD_ASSERT (! abfd->output_has_begun); |
11287 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
11288 | goto error_return; | |
11289 | ||
ee75fd95 | 11290 | /* Set sizes, and assign file positions for reloc sections. */ |
c152c796 AM |
11291 | for (o = abfd->sections; o != NULL; o = o->next) |
11292 | { | |
d4730f92 | 11293 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
c152c796 AM |
11294 | if ((o->flags & SEC_RELOC) != 0) |
11295 | { | |
d4730f92 BS |
11296 | if (esdo->rel.hdr |
11297 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rel))) | |
c152c796 AM |
11298 | goto error_return; |
11299 | ||
d4730f92 BS |
11300 | if (esdo->rela.hdr |
11301 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rela))) | |
c152c796 AM |
11302 | goto error_return; |
11303 | } | |
11304 | ||
11305 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them | |
11306 | to count upwards while actually outputting the relocations. */ | |
d4730f92 BS |
11307 | esdo->rel.count = 0; |
11308 | esdo->rela.count = 0; | |
0ce398f1 L |
11309 | |
11310 | if (esdo->this_hdr.sh_offset == (file_ptr) -1) | |
11311 | { | |
11312 | /* Cache the section contents so that they can be compressed | |
11313 | later. Use bfd_malloc since it will be freed by | |
11314 | bfd_compress_section_contents. */ | |
11315 | unsigned char *contents = esdo->this_hdr.contents; | |
11316 | if ((o->flags & SEC_ELF_COMPRESS) == 0 || contents != NULL) | |
11317 | abort (); | |
11318 | contents | |
11319 | = (unsigned char *) bfd_malloc (esdo->this_hdr.sh_size); | |
11320 | if (contents == NULL) | |
11321 | goto error_return; | |
11322 | esdo->this_hdr.contents = contents; | |
11323 | } | |
c152c796 AM |
11324 | } |
11325 | ||
c152c796 | 11326 | /* We have now assigned file positions for all the sections except |
a485e98e AM |
11327 | .symtab, .strtab, and non-loaded reloc sections. We start the |
11328 | .symtab section at the current file position, and write directly | |
11329 | to it. We build the .strtab section in memory. */ | |
c152c796 AM |
11330 | bfd_get_symcount (abfd) = 0; |
11331 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
11332 | /* sh_name is set in prep_headers. */ | |
11333 | symtab_hdr->sh_type = SHT_SYMTAB; | |
11334 | /* sh_flags, sh_addr and sh_size all start off zero. */ | |
11335 | symtab_hdr->sh_entsize = bed->s->sizeof_sym; | |
11336 | /* sh_link is set in assign_section_numbers. */ | |
11337 | /* sh_info is set below. */ | |
11338 | /* sh_offset is set just below. */ | |
72de5009 | 11339 | symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align; |
c152c796 | 11340 | |
ef10c3ac L |
11341 | if (max_sym_count < 20) |
11342 | max_sym_count = 20; | |
11343 | elf_hash_table (info)->strtabsize = max_sym_count; | |
11344 | amt = max_sym_count * sizeof (struct elf_sym_strtab); | |
11345 | elf_hash_table (info)->strtab | |
11346 | = (struct elf_sym_strtab *) bfd_malloc (amt); | |
11347 | if (elf_hash_table (info)->strtab == NULL) | |
c152c796 | 11348 | goto error_return; |
ef10c3ac L |
11349 | /* The real buffer will be allocated in elf_link_swap_symbols_out. */ |
11350 | flinfo.symshndxbuf | |
11351 | = (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF) | |
11352 | ? (Elf_External_Sym_Shndx *) -1 : NULL); | |
c152c796 | 11353 | |
8539e4e8 | 11354 | if (info->strip != strip_all || emit_relocs) |
c152c796 | 11355 | { |
8539e4e8 AM |
11356 | file_ptr off = elf_next_file_pos (abfd); |
11357 | ||
11358 | _bfd_elf_assign_file_position_for_section (symtab_hdr, off, TRUE); | |
11359 | ||
11360 | /* Note that at this point elf_next_file_pos (abfd) is | |
11361 | incorrect. We do not yet know the size of the .symtab section. | |
11362 | We correct next_file_pos below, after we do know the size. */ | |
11363 | ||
11364 | /* Start writing out the symbol table. The first symbol is always a | |
11365 | dummy symbol. */ | |
c152c796 AM |
11366 | elfsym.st_value = 0; |
11367 | elfsym.st_size = 0; | |
11368 | elfsym.st_info = 0; | |
11369 | elfsym.st_other = 0; | |
11370 | elfsym.st_shndx = SHN_UNDEF; | |
35fc36a8 | 11371 | elfsym.st_target_internal = 0; |
ef10c3ac L |
11372 | if (elf_link_output_symstrtab (&flinfo, NULL, &elfsym, |
11373 | bfd_und_section_ptr, NULL) != 1) | |
c152c796 | 11374 | goto error_return; |
c152c796 | 11375 | |
8539e4e8 AM |
11376 | /* Output a symbol for each section. We output these even if we are |
11377 | discarding local symbols, since they are used for relocs. These | |
11378 | symbols have no names. We store the index of each one in the | |
11379 | index field of the section, so that we can find it again when | |
11380 | outputting relocs. */ | |
11381 | ||
c152c796 AM |
11382 | elfsym.st_size = 0; |
11383 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
11384 | elfsym.st_other = 0; | |
f0b5bb34 | 11385 | elfsym.st_value = 0; |
35fc36a8 | 11386 | elfsym.st_target_internal = 0; |
c152c796 AM |
11387 | for (i = 1; i < elf_numsections (abfd); i++) |
11388 | { | |
11389 | o = bfd_section_from_elf_index (abfd, i); | |
11390 | if (o != NULL) | |
f0b5bb34 AM |
11391 | { |
11392 | o->target_index = bfd_get_symcount (abfd); | |
11393 | elfsym.st_shndx = i; | |
0e1862bb | 11394 | if (!bfd_link_relocatable (info)) |
f0b5bb34 | 11395 | elfsym.st_value = o->vma; |
ef10c3ac L |
11396 | if (elf_link_output_symstrtab (&flinfo, NULL, &elfsym, o, |
11397 | NULL) != 1) | |
f0b5bb34 AM |
11398 | goto error_return; |
11399 | } | |
c152c796 AM |
11400 | } |
11401 | } | |
11402 | ||
11403 | /* Allocate some memory to hold information read in from the input | |
11404 | files. */ | |
11405 | if (max_contents_size != 0) | |
11406 | { | |
8b127cbc AM |
11407 | flinfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); |
11408 | if (flinfo.contents == NULL) | |
c152c796 AM |
11409 | goto error_return; |
11410 | } | |
11411 | ||
11412 | if (max_external_reloc_size != 0) | |
11413 | { | |
8b127cbc AM |
11414 | flinfo.external_relocs = bfd_malloc (max_external_reloc_size); |
11415 | if (flinfo.external_relocs == NULL) | |
c152c796 AM |
11416 | goto error_return; |
11417 | } | |
11418 | ||
11419 | if (max_internal_reloc_count != 0) | |
11420 | { | |
11421 | amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel; | |
11422 | amt *= sizeof (Elf_Internal_Rela); | |
8b127cbc AM |
11423 | flinfo.internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); |
11424 | if (flinfo.internal_relocs == NULL) | |
c152c796 AM |
11425 | goto error_return; |
11426 | } | |
11427 | ||
11428 | if (max_sym_count != 0) | |
11429 | { | |
11430 | amt = max_sym_count * bed->s->sizeof_sym; | |
8b127cbc AM |
11431 | flinfo.external_syms = (bfd_byte *) bfd_malloc (amt); |
11432 | if (flinfo.external_syms == NULL) | |
c152c796 AM |
11433 | goto error_return; |
11434 | ||
11435 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
8b127cbc AM |
11436 | flinfo.internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt); |
11437 | if (flinfo.internal_syms == NULL) | |
c152c796 AM |
11438 | goto error_return; |
11439 | ||
11440 | amt = max_sym_count * sizeof (long); | |
8b127cbc AM |
11441 | flinfo.indices = (long int *) bfd_malloc (amt); |
11442 | if (flinfo.indices == NULL) | |
c152c796 AM |
11443 | goto error_return; |
11444 | ||
11445 | amt = max_sym_count * sizeof (asection *); | |
8b127cbc AM |
11446 | flinfo.sections = (asection **) bfd_malloc (amt); |
11447 | if (flinfo.sections == NULL) | |
c152c796 AM |
11448 | goto error_return; |
11449 | } | |
11450 | ||
11451 | if (max_sym_shndx_count != 0) | |
11452 | { | |
11453 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
8b127cbc AM |
11454 | flinfo.locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt); |
11455 | if (flinfo.locsym_shndx == NULL) | |
c152c796 AM |
11456 | goto error_return; |
11457 | } | |
11458 | ||
11459 | if (elf_hash_table (info)->tls_sec) | |
11460 | { | |
11461 | bfd_vma base, end = 0; | |
11462 | asection *sec; | |
11463 | ||
11464 | for (sec = elf_hash_table (info)->tls_sec; | |
11465 | sec && (sec->flags & SEC_THREAD_LOCAL); | |
11466 | sec = sec->next) | |
11467 | { | |
3a800eb9 | 11468 | bfd_size_type size = sec->size; |
c152c796 | 11469 | |
3a800eb9 AM |
11470 | if (size == 0 |
11471 | && (sec->flags & SEC_HAS_CONTENTS) == 0) | |
c152c796 | 11472 | { |
91d6fa6a NC |
11473 | struct bfd_link_order *ord = sec->map_tail.link_order; |
11474 | ||
11475 | if (ord != NULL) | |
11476 | size = ord->offset + ord->size; | |
c152c796 AM |
11477 | } |
11478 | end = sec->vma + size; | |
11479 | } | |
11480 | base = elf_hash_table (info)->tls_sec->vma; | |
7dc98aea RO |
11481 | /* Only align end of TLS section if static TLS doesn't have special |
11482 | alignment requirements. */ | |
11483 | if (bed->static_tls_alignment == 1) | |
11484 | end = align_power (end, | |
11485 | elf_hash_table (info)->tls_sec->alignment_power); | |
c152c796 AM |
11486 | elf_hash_table (info)->tls_size = end - base; |
11487 | } | |
11488 | ||
0b52efa6 PB |
11489 | /* Reorder SHF_LINK_ORDER sections. */ |
11490 | for (o = abfd->sections; o != NULL; o = o->next) | |
11491 | { | |
11492 | if (!elf_fixup_link_order (abfd, o)) | |
11493 | return FALSE; | |
11494 | } | |
11495 | ||
2f0c68f2 CM |
11496 | if (!_bfd_elf_fixup_eh_frame_hdr (info)) |
11497 | return FALSE; | |
11498 | ||
c152c796 AM |
11499 | /* Since ELF permits relocations to be against local symbols, we |
11500 | must have the local symbols available when we do the relocations. | |
11501 | Since we would rather only read the local symbols once, and we | |
11502 | would rather not keep them in memory, we handle all the | |
11503 | relocations for a single input file at the same time. | |
11504 | ||
11505 | Unfortunately, there is no way to know the total number of local | |
11506 | symbols until we have seen all of them, and the local symbol | |
11507 | indices precede the global symbol indices. This means that when | |
11508 | we are generating relocatable output, and we see a reloc against | |
11509 | a global symbol, we can not know the symbol index until we have | |
11510 | finished examining all the local symbols to see which ones we are | |
11511 | going to output. To deal with this, we keep the relocations in | |
11512 | memory, and don't output them until the end of the link. This is | |
11513 | an unfortunate waste of memory, but I don't see a good way around | |
11514 | it. Fortunately, it only happens when performing a relocatable | |
11515 | link, which is not the common case. FIXME: If keep_memory is set | |
11516 | we could write the relocs out and then read them again; I don't | |
11517 | know how bad the memory loss will be. */ | |
11518 | ||
c72f2fb2 | 11519 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
11520 | sub->output_has_begun = FALSE; |
11521 | for (o = abfd->sections; o != NULL; o = o->next) | |
11522 | { | |
8423293d | 11523 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
11524 | { |
11525 | if (p->type == bfd_indirect_link_order | |
11526 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) | |
11527 | == bfd_target_elf_flavour) | |
11528 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) | |
11529 | { | |
11530 | if (! sub->output_has_begun) | |
11531 | { | |
8b127cbc | 11532 | if (! elf_link_input_bfd (&flinfo, sub)) |
c152c796 AM |
11533 | goto error_return; |
11534 | sub->output_has_begun = TRUE; | |
11535 | } | |
11536 | } | |
11537 | else if (p->type == bfd_section_reloc_link_order | |
11538 | || p->type == bfd_symbol_reloc_link_order) | |
11539 | { | |
11540 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
11541 | goto error_return; | |
11542 | } | |
11543 | else | |
11544 | { | |
11545 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
351f65ca L |
11546 | { |
11547 | if (p->type == bfd_indirect_link_order | |
11548 | && (bfd_get_flavour (sub) | |
11549 | == bfd_target_elf_flavour) | |
11550 | && (elf_elfheader (sub)->e_ident[EI_CLASS] | |
11551 | != bed->s->elfclass)) | |
11552 | { | |
11553 | const char *iclass, *oclass; | |
11554 | ||
aebf9be7 | 11555 | switch (bed->s->elfclass) |
351f65ca | 11556 | { |
aebf9be7 NC |
11557 | case ELFCLASS64: oclass = "ELFCLASS64"; break; |
11558 | case ELFCLASS32: oclass = "ELFCLASS32"; break; | |
11559 | case ELFCLASSNONE: oclass = "ELFCLASSNONE"; break; | |
11560 | default: abort (); | |
351f65ca | 11561 | } |
aebf9be7 NC |
11562 | |
11563 | switch (elf_elfheader (sub)->e_ident[EI_CLASS]) | |
351f65ca | 11564 | { |
aebf9be7 NC |
11565 | case ELFCLASS64: iclass = "ELFCLASS64"; break; |
11566 | case ELFCLASS32: iclass = "ELFCLASS32"; break; | |
11567 | case ELFCLASSNONE: iclass = "ELFCLASSNONE"; break; | |
11568 | default: abort (); | |
351f65ca L |
11569 | } |
11570 | ||
11571 | bfd_set_error (bfd_error_wrong_format); | |
11572 | (*_bfd_error_handler) | |
11573 | (_("%B: file class %s incompatible with %s"), | |
11574 | sub, iclass, oclass); | |
11575 | } | |
11576 | ||
11577 | goto error_return; | |
11578 | } | |
c152c796 AM |
11579 | } |
11580 | } | |
11581 | } | |
11582 | ||
c0f00686 L |
11583 | /* Free symbol buffer if needed. */ |
11584 | if (!info->reduce_memory_overheads) | |
11585 | { | |
c72f2fb2 | 11586 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
3fcd97f1 JJ |
11587 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour |
11588 | && elf_tdata (sub)->symbuf) | |
c0f00686 L |
11589 | { |
11590 | free (elf_tdata (sub)->symbuf); | |
11591 | elf_tdata (sub)->symbuf = NULL; | |
11592 | } | |
11593 | } | |
11594 | ||
c152c796 AM |
11595 | /* Output any global symbols that got converted to local in a |
11596 | version script or due to symbol visibility. We do this in a | |
11597 | separate step since ELF requires all local symbols to appear | |
11598 | prior to any global symbols. FIXME: We should only do this if | |
11599 | some global symbols were, in fact, converted to become local. | |
11600 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
11601 | eoinfo.failed = FALSE; | |
8b127cbc | 11602 | eoinfo.flinfo = &flinfo; |
c152c796 | 11603 | eoinfo.localsyms = TRUE; |
34a79995 | 11604 | eoinfo.file_sym_done = FALSE; |
7686d77d | 11605 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 AM |
11606 | if (eoinfo.failed) |
11607 | return FALSE; | |
11608 | ||
4e617b1e PB |
11609 | /* If backend needs to output some local symbols not present in the hash |
11610 | table, do it now. */ | |
8539e4e8 AM |
11611 | if (bed->elf_backend_output_arch_local_syms |
11612 | && (info->strip != strip_all || emit_relocs)) | |
4e617b1e | 11613 | { |
6e0b88f1 | 11614 | typedef int (*out_sym_func) |
4e617b1e PB |
11615 | (void *, const char *, Elf_Internal_Sym *, asection *, |
11616 | struct elf_link_hash_entry *); | |
11617 | ||
11618 | if (! ((*bed->elf_backend_output_arch_local_syms) | |
ef10c3ac L |
11619 | (abfd, info, &flinfo, |
11620 | (out_sym_func) elf_link_output_symstrtab))) | |
4e617b1e PB |
11621 | return FALSE; |
11622 | } | |
11623 | ||
c152c796 AM |
11624 | /* That wrote out all the local symbols. Finish up the symbol table |
11625 | with the global symbols. Even if we want to strip everything we | |
11626 | can, we still need to deal with those global symbols that got | |
11627 | converted to local in a version script. */ | |
11628 | ||
11629 | /* The sh_info field records the index of the first non local symbol. */ | |
11630 | symtab_hdr->sh_info = bfd_get_symcount (abfd); | |
11631 | ||
11632 | if (dynamic | |
cae1fbbb L |
11633 | && elf_hash_table (info)->dynsym != NULL |
11634 | && (elf_hash_table (info)->dynsym->output_section | |
11635 | != bfd_abs_section_ptr)) | |
c152c796 AM |
11636 | { |
11637 | Elf_Internal_Sym sym; | |
cae1fbbb | 11638 | bfd_byte *dynsym = elf_hash_table (info)->dynsym->contents; |
c152c796 AM |
11639 | long last_local = 0; |
11640 | ||
11641 | /* Write out the section symbols for the output sections. */ | |
0e1862bb L |
11642 | if (bfd_link_pic (info) |
11643 | || elf_hash_table (info)->is_relocatable_executable) | |
c152c796 AM |
11644 | { |
11645 | asection *s; | |
11646 | ||
11647 | sym.st_size = 0; | |
11648 | sym.st_name = 0; | |
11649 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
11650 | sym.st_other = 0; | |
35fc36a8 | 11651 | sym.st_target_internal = 0; |
c152c796 AM |
11652 | |
11653 | for (s = abfd->sections; s != NULL; s = s->next) | |
11654 | { | |
11655 | int indx; | |
11656 | bfd_byte *dest; | |
11657 | long dynindx; | |
11658 | ||
c152c796 | 11659 | dynindx = elf_section_data (s)->dynindx; |
8c37241b JJ |
11660 | if (dynindx <= 0) |
11661 | continue; | |
11662 | indx = elf_section_data (s)->this_idx; | |
c152c796 AM |
11663 | BFD_ASSERT (indx > 0); |
11664 | sym.st_shndx = indx; | |
c0d5a53d L |
11665 | if (! check_dynsym (abfd, &sym)) |
11666 | return FALSE; | |
c152c796 AM |
11667 | sym.st_value = s->vma; |
11668 | dest = dynsym + dynindx * bed->s->sizeof_sym; | |
8c37241b JJ |
11669 | if (last_local < dynindx) |
11670 | last_local = dynindx; | |
c152c796 AM |
11671 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); |
11672 | } | |
c152c796 AM |
11673 | } |
11674 | ||
11675 | /* Write out the local dynsyms. */ | |
11676 | if (elf_hash_table (info)->dynlocal) | |
11677 | { | |
11678 | struct elf_link_local_dynamic_entry *e; | |
11679 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
11680 | { | |
11681 | asection *s; | |
11682 | bfd_byte *dest; | |
11683 | ||
935bd1e0 | 11684 | /* Copy the internal symbol and turn off visibility. |
c152c796 AM |
11685 | Note that we saved a word of storage and overwrote |
11686 | the original st_name with the dynstr_index. */ | |
11687 | sym = e->isym; | |
935bd1e0 | 11688 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); |
c152c796 | 11689 | |
cb33740c AM |
11690 | s = bfd_section_from_elf_index (e->input_bfd, |
11691 | e->isym.st_shndx); | |
11692 | if (s != NULL) | |
c152c796 | 11693 | { |
c152c796 AM |
11694 | sym.st_shndx = |
11695 | elf_section_data (s->output_section)->this_idx; | |
c0d5a53d L |
11696 | if (! check_dynsym (abfd, &sym)) |
11697 | return FALSE; | |
c152c796 AM |
11698 | sym.st_value = (s->output_section->vma |
11699 | + s->output_offset | |
11700 | + e->isym.st_value); | |
11701 | } | |
11702 | ||
11703 | if (last_local < e->dynindx) | |
11704 | last_local = e->dynindx; | |
11705 | ||
11706 | dest = dynsym + e->dynindx * bed->s->sizeof_sym; | |
11707 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); | |
11708 | } | |
11709 | } | |
11710 | ||
cae1fbbb | 11711 | elf_section_data (elf_hash_table (info)->dynsym->output_section)->this_hdr.sh_info = |
c152c796 AM |
11712 | last_local + 1; |
11713 | } | |
11714 | ||
11715 | /* We get the global symbols from the hash table. */ | |
11716 | eoinfo.failed = FALSE; | |
11717 | eoinfo.localsyms = FALSE; | |
8b127cbc | 11718 | eoinfo.flinfo = &flinfo; |
7686d77d | 11719 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 AM |
11720 | if (eoinfo.failed) |
11721 | return FALSE; | |
11722 | ||
11723 | /* If backend needs to output some symbols not present in the hash | |
11724 | table, do it now. */ | |
8539e4e8 AM |
11725 | if (bed->elf_backend_output_arch_syms |
11726 | && (info->strip != strip_all || emit_relocs)) | |
c152c796 | 11727 | { |
6e0b88f1 | 11728 | typedef int (*out_sym_func) |
c152c796 AM |
11729 | (void *, const char *, Elf_Internal_Sym *, asection *, |
11730 | struct elf_link_hash_entry *); | |
11731 | ||
11732 | if (! ((*bed->elf_backend_output_arch_syms) | |
ef10c3ac L |
11733 | (abfd, info, &flinfo, |
11734 | (out_sym_func) elf_link_output_symstrtab))) | |
c152c796 AM |
11735 | return FALSE; |
11736 | } | |
11737 | ||
ef10c3ac L |
11738 | /* Finalize the .strtab section. */ |
11739 | _bfd_elf_strtab_finalize (flinfo.symstrtab); | |
11740 | ||
11741 | /* Swap out the .strtab section. */ | |
11742 | if (!elf_link_swap_symbols_out (&flinfo)) | |
c152c796 AM |
11743 | return FALSE; |
11744 | ||
11745 | /* Now we know the size of the symtab section. */ | |
c152c796 AM |
11746 | if (bfd_get_symcount (abfd) > 0) |
11747 | { | |
ee3b52e9 L |
11748 | /* Finish up and write out the symbol string table (.strtab) |
11749 | section. */ | |
11750 | Elf_Internal_Shdr *symstrtab_hdr; | |
8539e4e8 AM |
11751 | file_ptr off = symtab_hdr->sh_offset + symtab_hdr->sh_size; |
11752 | ||
6a40cf0c NC |
11753 | symtab_shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; |
11754 | if (symtab_shndx_hdr != NULL && symtab_shndx_hdr->sh_name != 0) | |
8539e4e8 AM |
11755 | { |
11756 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
11757 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
11758 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
11759 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
11760 | symtab_shndx_hdr->sh_size = amt; | |
11761 | ||
11762 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, | |
11763 | off, TRUE); | |
11764 | ||
11765 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
11766 | || (bfd_bwrite (flinfo.symshndxbuf, amt, abfd) != amt)) | |
11767 | return FALSE; | |
11768 | } | |
ee3b52e9 L |
11769 | |
11770 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
11771 | /* sh_name was set in prep_headers. */ | |
11772 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
84865015 | 11773 | symstrtab_hdr->sh_flags = bed->elf_strtab_flags; |
ee3b52e9 | 11774 | symstrtab_hdr->sh_addr = 0; |
ef10c3ac | 11775 | symstrtab_hdr->sh_size = _bfd_elf_strtab_size (flinfo.symstrtab); |
ee3b52e9 L |
11776 | symstrtab_hdr->sh_entsize = 0; |
11777 | symstrtab_hdr->sh_link = 0; | |
11778 | symstrtab_hdr->sh_info = 0; | |
11779 | /* sh_offset is set just below. */ | |
11780 | symstrtab_hdr->sh_addralign = 1; | |
11781 | ||
11782 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, | |
11783 | off, TRUE); | |
11784 | elf_next_file_pos (abfd) = off; | |
11785 | ||
c152c796 | 11786 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 |
ef10c3ac | 11787 | || ! _bfd_elf_strtab_emit (abfd, flinfo.symstrtab)) |
c152c796 AM |
11788 | return FALSE; |
11789 | } | |
11790 | ||
11791 | /* Adjust the relocs to have the correct symbol indices. */ | |
11792 | for (o = abfd->sections; o != NULL; o = o->next) | |
11793 | { | |
d4730f92 | 11794 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
28dbcedc | 11795 | bfd_boolean sort; |
c152c796 AM |
11796 | if ((o->flags & SEC_RELOC) == 0) |
11797 | continue; | |
11798 | ||
28dbcedc | 11799 | sort = bed->sort_relocs_p == NULL || (*bed->sort_relocs_p) (o); |
bca6d0e3 AM |
11800 | if (esdo->rel.hdr != NULL |
11801 | && !elf_link_adjust_relocs (abfd, &esdo->rel, sort)) | |
11802 | return FALSE; | |
11803 | if (esdo->rela.hdr != NULL | |
11804 | && !elf_link_adjust_relocs (abfd, &esdo->rela, sort)) | |
11805 | return FALSE; | |
c152c796 AM |
11806 | |
11807 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
11808 | trying to swap the relocs out itself. */ | |
11809 | o->reloc_count = 0; | |
11810 | } | |
11811 | ||
11812 | if (dynamic && info->combreloc && dynobj != NULL) | |
11813 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
11814 | ||
11815 | /* If we are linking against a dynamic object, or generating a | |
11816 | shared library, finish up the dynamic linking information. */ | |
11817 | if (dynamic) | |
11818 | { | |
11819 | bfd_byte *dyncon, *dynconend; | |
11820 | ||
11821 | /* Fix up .dynamic entries. */ | |
3d4d4302 | 11822 | o = bfd_get_linker_section (dynobj, ".dynamic"); |
c152c796 AM |
11823 | BFD_ASSERT (o != NULL); |
11824 | ||
11825 | dyncon = o->contents; | |
eea6121a | 11826 | dynconend = o->contents + o->size; |
c152c796 AM |
11827 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) |
11828 | { | |
11829 | Elf_Internal_Dyn dyn; | |
11830 | const char *name; | |
11831 | unsigned int type; | |
11832 | ||
11833 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
11834 | ||
11835 | switch (dyn.d_tag) | |
11836 | { | |
11837 | default: | |
11838 | continue; | |
11839 | case DT_NULL: | |
11840 | if (relativecount > 0 && dyncon + bed->s->sizeof_dyn < dynconend) | |
11841 | { | |
11842 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
11843 | { | |
11844 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
11845 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
11846 | default: continue; | |
11847 | } | |
11848 | dyn.d_un.d_val = relativecount; | |
11849 | relativecount = 0; | |
11850 | break; | |
11851 | } | |
11852 | continue; | |
11853 | ||
11854 | case DT_INIT: | |
11855 | name = info->init_function; | |
11856 | goto get_sym; | |
11857 | case DT_FINI: | |
11858 | name = info->fini_function; | |
11859 | get_sym: | |
11860 | { | |
11861 | struct elf_link_hash_entry *h; | |
11862 | ||
11863 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
11864 | FALSE, FALSE, TRUE); | |
11865 | if (h != NULL | |
11866 | && (h->root.type == bfd_link_hash_defined | |
11867 | || h->root.type == bfd_link_hash_defweak)) | |
11868 | { | |
bef26483 | 11869 | dyn.d_un.d_ptr = h->root.u.def.value; |
c152c796 AM |
11870 | o = h->root.u.def.section; |
11871 | if (o->output_section != NULL) | |
bef26483 | 11872 | dyn.d_un.d_ptr += (o->output_section->vma |
c152c796 AM |
11873 | + o->output_offset); |
11874 | else | |
11875 | { | |
11876 | /* The symbol is imported from another shared | |
11877 | library and does not apply to this one. */ | |
bef26483 | 11878 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
11879 | } |
11880 | break; | |
11881 | } | |
11882 | } | |
11883 | continue; | |
11884 | ||
11885 | case DT_PREINIT_ARRAYSZ: | |
11886 | name = ".preinit_array"; | |
4ade44b7 | 11887 | goto get_out_size; |
c152c796 AM |
11888 | case DT_INIT_ARRAYSZ: |
11889 | name = ".init_array"; | |
4ade44b7 | 11890 | goto get_out_size; |
c152c796 AM |
11891 | case DT_FINI_ARRAYSZ: |
11892 | name = ".fini_array"; | |
4ade44b7 | 11893 | get_out_size: |
c152c796 AM |
11894 | o = bfd_get_section_by_name (abfd, name); |
11895 | if (o == NULL) | |
11896 | { | |
11897 | (*_bfd_error_handler) | |
4ade44b7 | 11898 | (_("could not find section %s"), name); |
c152c796 AM |
11899 | goto error_return; |
11900 | } | |
eea6121a | 11901 | if (o->size == 0) |
c152c796 AM |
11902 | (*_bfd_error_handler) |
11903 | (_("warning: %s section has zero size"), name); | |
eea6121a | 11904 | dyn.d_un.d_val = o->size; |
c152c796 AM |
11905 | break; |
11906 | ||
11907 | case DT_PREINIT_ARRAY: | |
11908 | name = ".preinit_array"; | |
4ade44b7 | 11909 | goto get_out_vma; |
c152c796 AM |
11910 | case DT_INIT_ARRAY: |
11911 | name = ".init_array"; | |
4ade44b7 | 11912 | goto get_out_vma; |
c152c796 AM |
11913 | case DT_FINI_ARRAY: |
11914 | name = ".fini_array"; | |
4ade44b7 AM |
11915 | get_out_vma: |
11916 | o = bfd_get_section_by_name (abfd, name); | |
11917 | goto do_vma; | |
c152c796 AM |
11918 | |
11919 | case DT_HASH: | |
11920 | name = ".hash"; | |
11921 | goto get_vma; | |
fdc90cb4 JJ |
11922 | case DT_GNU_HASH: |
11923 | name = ".gnu.hash"; | |
11924 | goto get_vma; | |
c152c796 AM |
11925 | case DT_STRTAB: |
11926 | name = ".dynstr"; | |
11927 | goto get_vma; | |
11928 | case DT_SYMTAB: | |
11929 | name = ".dynsym"; | |
11930 | goto get_vma; | |
11931 | case DT_VERDEF: | |
11932 | name = ".gnu.version_d"; | |
11933 | goto get_vma; | |
11934 | case DT_VERNEED: | |
11935 | name = ".gnu.version_r"; | |
11936 | goto get_vma; | |
11937 | case DT_VERSYM: | |
11938 | name = ".gnu.version"; | |
11939 | get_vma: | |
4ade44b7 AM |
11940 | o = bfd_get_linker_section (dynobj, name); |
11941 | do_vma: | |
c152c796 AM |
11942 | if (o == NULL) |
11943 | { | |
11944 | (*_bfd_error_handler) | |
4ade44b7 | 11945 | (_("could not find section %s"), name); |
c152c796 AM |
11946 | goto error_return; |
11947 | } | |
894891db NC |
11948 | if (elf_section_data (o->output_section)->this_hdr.sh_type == SHT_NOTE) |
11949 | { | |
11950 | (*_bfd_error_handler) | |
11951 | (_("warning: section '%s' is being made into a note"), name); | |
11952 | bfd_set_error (bfd_error_nonrepresentable_section); | |
11953 | goto error_return; | |
11954 | } | |
4ade44b7 | 11955 | dyn.d_un.d_ptr = o->output_section->vma + o->output_offset; |
c152c796 AM |
11956 | break; |
11957 | ||
11958 | case DT_REL: | |
11959 | case DT_RELA: | |
11960 | case DT_RELSZ: | |
11961 | case DT_RELASZ: | |
11962 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
11963 | type = SHT_REL; | |
11964 | else | |
11965 | type = SHT_RELA; | |
11966 | dyn.d_un.d_val = 0; | |
bef26483 | 11967 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
11968 | for (i = 1; i < elf_numsections (abfd); i++) |
11969 | { | |
11970 | Elf_Internal_Shdr *hdr; | |
11971 | ||
11972 | hdr = elf_elfsections (abfd)[i]; | |
11973 | if (hdr->sh_type == type | |
11974 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
11975 | { | |
11976 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
11977 | dyn.d_un.d_val += hdr->sh_size; | |
11978 | else | |
11979 | { | |
bef26483 AM |
11980 | if (dyn.d_un.d_ptr == 0 |
11981 | || hdr->sh_addr < dyn.d_un.d_ptr) | |
11982 | dyn.d_un.d_ptr = hdr->sh_addr; | |
c152c796 AM |
11983 | } |
11984 | } | |
11985 | } | |
11986 | break; | |
11987 | } | |
11988 | bed->s->swap_dyn_out (dynobj, &dyn, dyncon); | |
11989 | } | |
11990 | } | |
11991 | ||
11992 | /* If we have created any dynamic sections, then output them. */ | |
11993 | if (dynobj != NULL) | |
11994 | { | |
11995 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
11996 | goto error_return; | |
11997 | ||
943284cc | 11998 | /* Check for DT_TEXTREL (late, in case the backend removes it). */ |
0e1862bb | 11999 | if (((info->warn_shared_textrel && bfd_link_pic (info)) |
be7b303d | 12000 | || info->error_textrel) |
3d4d4302 | 12001 | && (o = bfd_get_linker_section (dynobj, ".dynamic")) != NULL) |
943284cc DJ |
12002 | { |
12003 | bfd_byte *dyncon, *dynconend; | |
12004 | ||
943284cc DJ |
12005 | dyncon = o->contents; |
12006 | dynconend = o->contents + o->size; | |
12007 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) | |
12008 | { | |
12009 | Elf_Internal_Dyn dyn; | |
12010 | ||
12011 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
12012 | ||
12013 | if (dyn.d_tag == DT_TEXTREL) | |
12014 | { | |
c192a133 AM |
12015 | if (info->error_textrel) |
12016 | info->callbacks->einfo | |
12017 | (_("%P%X: read-only segment has dynamic relocations.\n")); | |
12018 | else | |
12019 | info->callbacks->einfo | |
12020 | (_("%P: warning: creating a DT_TEXTREL in a shared object.\n")); | |
943284cc DJ |
12021 | break; |
12022 | } | |
12023 | } | |
12024 | } | |
12025 | ||
c152c796 AM |
12026 | for (o = dynobj->sections; o != NULL; o = o->next) |
12027 | { | |
12028 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
eea6121a | 12029 | || o->size == 0 |
c152c796 AM |
12030 | || o->output_section == bfd_abs_section_ptr) |
12031 | continue; | |
12032 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
12033 | { | |
12034 | /* At this point, we are only interested in sections | |
12035 | created by _bfd_elf_link_create_dynamic_sections. */ | |
12036 | continue; | |
12037 | } | |
3722b82f AM |
12038 | if (elf_hash_table (info)->stab_info.stabstr == o) |
12039 | continue; | |
eea6121a AM |
12040 | if (elf_hash_table (info)->eh_info.hdr_sec == o) |
12041 | continue; | |
3d4d4302 | 12042 | if (strcmp (o->name, ".dynstr") != 0) |
c152c796 AM |
12043 | { |
12044 | if (! bfd_set_section_contents (abfd, o->output_section, | |
12045 | o->contents, | |
37b01f6a DG |
12046 | (file_ptr) o->output_offset |
12047 | * bfd_octets_per_byte (abfd), | |
eea6121a | 12048 | o->size)) |
c152c796 AM |
12049 | goto error_return; |
12050 | } | |
12051 | else | |
12052 | { | |
12053 | /* The contents of the .dynstr section are actually in a | |
12054 | stringtab. */ | |
8539e4e8 AM |
12055 | file_ptr off; |
12056 | ||
c152c796 AM |
12057 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; |
12058 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
12059 | || ! _bfd_elf_strtab_emit (abfd, | |
12060 | elf_hash_table (info)->dynstr)) | |
12061 | goto error_return; | |
12062 | } | |
12063 | } | |
12064 | } | |
12065 | ||
0e1862bb | 12066 | if (bfd_link_relocatable (info)) |
c152c796 AM |
12067 | { |
12068 | bfd_boolean failed = FALSE; | |
12069 | ||
12070 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); | |
12071 | if (failed) | |
12072 | goto error_return; | |
12073 | } | |
12074 | ||
12075 | /* If we have optimized stabs strings, output them. */ | |
3722b82f | 12076 | if (elf_hash_table (info)->stab_info.stabstr != NULL) |
c152c796 AM |
12077 | { |
12078 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
12079 | goto error_return; | |
12080 | } | |
12081 | ||
9f7c3e5e AM |
12082 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) |
12083 | goto error_return; | |
c152c796 | 12084 | |
9f7c3e5e | 12085 | elf_final_link_free (abfd, &flinfo); |
c152c796 | 12086 | |
12bd6957 | 12087 | elf_linker (abfd) = TRUE; |
c152c796 | 12088 | |
104d59d1 JM |
12089 | if (attr_section) |
12090 | { | |
a50b1753 | 12091 | bfd_byte *contents = (bfd_byte *) bfd_malloc (attr_size); |
104d59d1 | 12092 | if (contents == NULL) |
d0f16d5e | 12093 | return FALSE; /* Bail out and fail. */ |
104d59d1 JM |
12094 | bfd_elf_set_obj_attr_contents (abfd, contents, attr_size); |
12095 | bfd_set_section_contents (abfd, attr_section, contents, 0, attr_size); | |
12096 | free (contents); | |
12097 | } | |
12098 | ||
c152c796 AM |
12099 | return TRUE; |
12100 | ||
12101 | error_return: | |
9f7c3e5e | 12102 | elf_final_link_free (abfd, &flinfo); |
c152c796 AM |
12103 | return FALSE; |
12104 | } | |
12105 | \f | |
5241d853 RS |
12106 | /* Initialize COOKIE for input bfd ABFD. */ |
12107 | ||
12108 | static bfd_boolean | |
12109 | init_reloc_cookie (struct elf_reloc_cookie *cookie, | |
12110 | struct bfd_link_info *info, bfd *abfd) | |
12111 | { | |
12112 | Elf_Internal_Shdr *symtab_hdr; | |
12113 | const struct elf_backend_data *bed; | |
12114 | ||
12115 | bed = get_elf_backend_data (abfd); | |
12116 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
12117 | ||
12118 | cookie->abfd = abfd; | |
12119 | cookie->sym_hashes = elf_sym_hashes (abfd); | |
12120 | cookie->bad_symtab = elf_bad_symtab (abfd); | |
12121 | if (cookie->bad_symtab) | |
12122 | { | |
12123 | cookie->locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
12124 | cookie->extsymoff = 0; | |
12125 | } | |
12126 | else | |
12127 | { | |
12128 | cookie->locsymcount = symtab_hdr->sh_info; | |
12129 | cookie->extsymoff = symtab_hdr->sh_info; | |
12130 | } | |
12131 | ||
12132 | if (bed->s->arch_size == 32) | |
12133 | cookie->r_sym_shift = 8; | |
12134 | else | |
12135 | cookie->r_sym_shift = 32; | |
12136 | ||
12137 | cookie->locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
12138 | if (cookie->locsyms == NULL && cookie->locsymcount != 0) | |
12139 | { | |
12140 | cookie->locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
12141 | cookie->locsymcount, 0, | |
12142 | NULL, NULL, NULL); | |
12143 | if (cookie->locsyms == NULL) | |
12144 | { | |
12145 | info->callbacks->einfo (_("%P%X: can not read symbols: %E\n")); | |
12146 | return FALSE; | |
12147 | } | |
12148 | if (info->keep_memory) | |
12149 | symtab_hdr->contents = (bfd_byte *) cookie->locsyms; | |
12150 | } | |
12151 | return TRUE; | |
12152 | } | |
12153 | ||
12154 | /* Free the memory allocated by init_reloc_cookie, if appropriate. */ | |
12155 | ||
12156 | static void | |
12157 | fini_reloc_cookie (struct elf_reloc_cookie *cookie, bfd *abfd) | |
12158 | { | |
12159 | Elf_Internal_Shdr *symtab_hdr; | |
12160 | ||
12161 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
12162 | if (cookie->locsyms != NULL | |
12163 | && symtab_hdr->contents != (unsigned char *) cookie->locsyms) | |
12164 | free (cookie->locsyms); | |
12165 | } | |
12166 | ||
12167 | /* Initialize the relocation information in COOKIE for input section SEC | |
12168 | of input bfd ABFD. */ | |
12169 | ||
12170 | static bfd_boolean | |
12171 | init_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
12172 | struct bfd_link_info *info, bfd *abfd, | |
12173 | asection *sec) | |
12174 | { | |
12175 | const struct elf_backend_data *bed; | |
12176 | ||
12177 | if (sec->reloc_count == 0) | |
12178 | { | |
12179 | cookie->rels = NULL; | |
12180 | cookie->relend = NULL; | |
12181 | } | |
12182 | else | |
12183 | { | |
12184 | bed = get_elf_backend_data (abfd); | |
12185 | ||
12186 | cookie->rels = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, | |
12187 | info->keep_memory); | |
12188 | if (cookie->rels == NULL) | |
12189 | return FALSE; | |
12190 | cookie->rel = cookie->rels; | |
12191 | cookie->relend = (cookie->rels | |
12192 | + sec->reloc_count * bed->s->int_rels_per_ext_rel); | |
12193 | } | |
12194 | cookie->rel = cookie->rels; | |
12195 | return TRUE; | |
12196 | } | |
12197 | ||
12198 | /* Free the memory allocated by init_reloc_cookie_rels, | |
12199 | if appropriate. */ | |
12200 | ||
12201 | static void | |
12202 | fini_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
12203 | asection *sec) | |
12204 | { | |
12205 | if (cookie->rels && elf_section_data (sec)->relocs != cookie->rels) | |
12206 | free (cookie->rels); | |
12207 | } | |
12208 | ||
12209 | /* Initialize the whole of COOKIE for input section SEC. */ | |
12210 | ||
12211 | static bfd_boolean | |
12212 | init_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
12213 | struct bfd_link_info *info, | |
12214 | asection *sec) | |
12215 | { | |
12216 | if (!init_reloc_cookie (cookie, info, sec->owner)) | |
12217 | goto error1; | |
12218 | if (!init_reloc_cookie_rels (cookie, info, sec->owner, sec)) | |
12219 | goto error2; | |
12220 | return TRUE; | |
12221 | ||
12222 | error2: | |
12223 | fini_reloc_cookie (cookie, sec->owner); | |
12224 | error1: | |
12225 | return FALSE; | |
12226 | } | |
12227 | ||
12228 | /* Free the memory allocated by init_reloc_cookie_for_section, | |
12229 | if appropriate. */ | |
12230 | ||
12231 | static void | |
12232 | fini_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
12233 | asection *sec) | |
12234 | { | |
12235 | fini_reloc_cookie_rels (cookie, sec); | |
12236 | fini_reloc_cookie (cookie, sec->owner); | |
12237 | } | |
12238 | \f | |
c152c796 AM |
12239 | /* Garbage collect unused sections. */ |
12240 | ||
07adf181 AM |
12241 | /* Default gc_mark_hook. */ |
12242 | ||
12243 | asection * | |
12244 | _bfd_elf_gc_mark_hook (asection *sec, | |
12245 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
12246 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, | |
12247 | struct elf_link_hash_entry *h, | |
12248 | Elf_Internal_Sym *sym) | |
12249 | { | |
12250 | if (h != NULL) | |
12251 | { | |
12252 | switch (h->root.type) | |
12253 | { | |
12254 | case bfd_link_hash_defined: | |
12255 | case bfd_link_hash_defweak: | |
12256 | return h->root.u.def.section; | |
12257 | ||
12258 | case bfd_link_hash_common: | |
12259 | return h->root.u.c.p->section; | |
12260 | ||
12261 | default: | |
12262 | break; | |
12263 | } | |
12264 | } | |
12265 | else | |
12266 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
12267 | ||
12268 | return NULL; | |
12269 | } | |
12270 | ||
a6a4679f AM |
12271 | /* For undefined __start_<name> and __stop_<name> symbols, return the |
12272 | first input section matching <name>. Return NULL otherwise. */ | |
12273 | ||
12274 | asection * | |
12275 | _bfd_elf_is_start_stop (const struct bfd_link_info *info, | |
12276 | struct elf_link_hash_entry *h) | |
12277 | { | |
12278 | asection *s; | |
12279 | const char *sec_name; | |
12280 | ||
12281 | if (h->root.type != bfd_link_hash_undefined | |
12282 | && h->root.type != bfd_link_hash_undefweak) | |
12283 | return NULL; | |
12284 | ||
12285 | s = h->root.u.undef.section; | |
12286 | if (s != NULL) | |
12287 | { | |
12288 | if (s == (asection *) 0 - 1) | |
12289 | return NULL; | |
12290 | return s; | |
12291 | } | |
12292 | ||
12293 | sec_name = NULL; | |
12294 | if (strncmp (h->root.root.string, "__start_", 8) == 0) | |
12295 | sec_name = h->root.root.string + 8; | |
12296 | else if (strncmp (h->root.root.string, "__stop_", 7) == 0) | |
12297 | sec_name = h->root.root.string + 7; | |
12298 | ||
12299 | if (sec_name != NULL && *sec_name != '\0') | |
12300 | { | |
12301 | bfd *i; | |
12302 | ||
12303 | for (i = info->input_bfds; i != NULL; i = i->link.next) | |
12304 | { | |
12305 | s = bfd_get_section_by_name (i, sec_name); | |
12306 | if (s != NULL) | |
12307 | { | |
12308 | h->root.u.undef.section = s; | |
12309 | break; | |
12310 | } | |
12311 | } | |
12312 | } | |
12313 | ||
12314 | if (s == NULL) | |
12315 | h->root.u.undef.section = (asection *) 0 - 1; | |
12316 | ||
12317 | return s; | |
12318 | } | |
12319 | ||
5241d853 RS |
12320 | /* COOKIE->rel describes a relocation against section SEC, which is |
12321 | a section we've decided to keep. Return the section that contains | |
12322 | the relocation symbol, or NULL if no section contains it. */ | |
12323 | ||
12324 | asection * | |
12325 | _bfd_elf_gc_mark_rsec (struct bfd_link_info *info, asection *sec, | |
12326 | elf_gc_mark_hook_fn gc_mark_hook, | |
1cce69b9 AM |
12327 | struct elf_reloc_cookie *cookie, |
12328 | bfd_boolean *start_stop) | |
5241d853 RS |
12329 | { |
12330 | unsigned long r_symndx; | |
12331 | struct elf_link_hash_entry *h; | |
12332 | ||
12333 | r_symndx = cookie->rel->r_info >> cookie->r_sym_shift; | |
cf35638d | 12334 | if (r_symndx == STN_UNDEF) |
5241d853 RS |
12335 | return NULL; |
12336 | ||
12337 | if (r_symndx >= cookie->locsymcount | |
12338 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
12339 | { | |
12340 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; | |
263ddf68 L |
12341 | if (h == NULL) |
12342 | { | |
12343 | info->callbacks->einfo (_("%F%P: corrupt input: %B\n"), | |
12344 | sec->owner); | |
12345 | return NULL; | |
12346 | } | |
5241d853 RS |
12347 | while (h->root.type == bfd_link_hash_indirect |
12348 | || h->root.type == bfd_link_hash_warning) | |
12349 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1d5316ab | 12350 | h->mark = 1; |
4e6b54a6 AM |
12351 | /* If this symbol is weak and there is a non-weak definition, we |
12352 | keep the non-weak definition because many backends put | |
12353 | dynamic reloc info on the non-weak definition for code | |
12354 | handling copy relocs. */ | |
12355 | if (h->u.weakdef != NULL) | |
12356 | h->u.weakdef->mark = 1; | |
1cce69b9 | 12357 | |
a6a4679f | 12358 | if (start_stop != NULL) |
1cce69b9 AM |
12359 | { |
12360 | /* To work around a glibc bug, mark all XXX input sections | |
12361 | when there is an as yet undefined reference to __start_XXX | |
12362 | or __stop_XXX symbols. The linker will later define such | |
12363 | symbols for orphan input sections that have a name | |
12364 | representable as a C identifier. */ | |
a6a4679f | 12365 | asection *s = _bfd_elf_is_start_stop (info, h); |
1cce69b9 | 12366 | |
a6a4679f | 12367 | if (s != NULL) |
1cce69b9 | 12368 | { |
a6a4679f AM |
12369 | *start_stop = !s->gc_mark; |
12370 | return s; | |
1cce69b9 AM |
12371 | } |
12372 | } | |
12373 | ||
5241d853 RS |
12374 | return (*gc_mark_hook) (sec, info, cookie->rel, h, NULL); |
12375 | } | |
12376 | ||
12377 | return (*gc_mark_hook) (sec, info, cookie->rel, NULL, | |
12378 | &cookie->locsyms[r_symndx]); | |
12379 | } | |
12380 | ||
12381 | /* COOKIE->rel describes a relocation against section SEC, which is | |
12382 | a section we've decided to keep. Mark the section that contains | |
9d0a14d3 | 12383 | the relocation symbol. */ |
5241d853 RS |
12384 | |
12385 | bfd_boolean | |
12386 | _bfd_elf_gc_mark_reloc (struct bfd_link_info *info, | |
12387 | asection *sec, | |
12388 | elf_gc_mark_hook_fn gc_mark_hook, | |
9d0a14d3 | 12389 | struct elf_reloc_cookie *cookie) |
5241d853 RS |
12390 | { |
12391 | asection *rsec; | |
1cce69b9 | 12392 | bfd_boolean start_stop = FALSE; |
5241d853 | 12393 | |
1cce69b9 AM |
12394 | rsec = _bfd_elf_gc_mark_rsec (info, sec, gc_mark_hook, cookie, &start_stop); |
12395 | while (rsec != NULL) | |
5241d853 | 12396 | { |
1cce69b9 AM |
12397 | if (!rsec->gc_mark) |
12398 | { | |
12399 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour | |
12400 | || (rsec->owner->flags & DYNAMIC) != 0) | |
12401 | rsec->gc_mark = 1; | |
12402 | else if (!_bfd_elf_gc_mark (info, rsec, gc_mark_hook)) | |
12403 | return FALSE; | |
12404 | } | |
12405 | if (!start_stop) | |
12406 | break; | |
199af150 | 12407 | rsec = bfd_get_next_section_by_name (rsec->owner, rsec); |
5241d853 RS |
12408 | } |
12409 | return TRUE; | |
12410 | } | |
12411 | ||
07adf181 AM |
12412 | /* The mark phase of garbage collection. For a given section, mark |
12413 | it and any sections in this section's group, and all the sections | |
12414 | which define symbols to which it refers. */ | |
12415 | ||
ccfa59ea AM |
12416 | bfd_boolean |
12417 | _bfd_elf_gc_mark (struct bfd_link_info *info, | |
12418 | asection *sec, | |
6a5bb875 | 12419 | elf_gc_mark_hook_fn gc_mark_hook) |
c152c796 AM |
12420 | { |
12421 | bfd_boolean ret; | |
9d0a14d3 | 12422 | asection *group_sec, *eh_frame; |
c152c796 AM |
12423 | |
12424 | sec->gc_mark = 1; | |
12425 | ||
12426 | /* Mark all the sections in the group. */ | |
12427 | group_sec = elf_section_data (sec)->next_in_group; | |
12428 | if (group_sec && !group_sec->gc_mark) | |
ccfa59ea | 12429 | if (!_bfd_elf_gc_mark (info, group_sec, gc_mark_hook)) |
c152c796 AM |
12430 | return FALSE; |
12431 | ||
12432 | /* Look through the section relocs. */ | |
12433 | ret = TRUE; | |
9d0a14d3 RS |
12434 | eh_frame = elf_eh_frame_section (sec->owner); |
12435 | if ((sec->flags & SEC_RELOC) != 0 | |
12436 | && sec->reloc_count > 0 | |
12437 | && sec != eh_frame) | |
c152c796 | 12438 | { |
5241d853 | 12439 | struct elf_reloc_cookie cookie; |
c152c796 | 12440 | |
5241d853 RS |
12441 | if (!init_reloc_cookie_for_section (&cookie, info, sec)) |
12442 | ret = FALSE; | |
c152c796 | 12443 | else |
c152c796 | 12444 | { |
5241d853 | 12445 | for (; cookie.rel < cookie.relend; cookie.rel++) |
9d0a14d3 | 12446 | if (!_bfd_elf_gc_mark_reloc (info, sec, gc_mark_hook, &cookie)) |
5241d853 RS |
12447 | { |
12448 | ret = FALSE; | |
12449 | break; | |
12450 | } | |
12451 | fini_reloc_cookie_for_section (&cookie, sec); | |
c152c796 AM |
12452 | } |
12453 | } | |
9d0a14d3 RS |
12454 | |
12455 | if (ret && eh_frame && elf_fde_list (sec)) | |
12456 | { | |
12457 | struct elf_reloc_cookie cookie; | |
12458 | ||
12459 | if (!init_reloc_cookie_for_section (&cookie, info, eh_frame)) | |
12460 | ret = FALSE; | |
12461 | else | |
12462 | { | |
12463 | if (!_bfd_elf_gc_mark_fdes (info, sec, eh_frame, | |
12464 | gc_mark_hook, &cookie)) | |
12465 | ret = FALSE; | |
12466 | fini_reloc_cookie_for_section (&cookie, eh_frame); | |
12467 | } | |
12468 | } | |
12469 | ||
2f0c68f2 CM |
12470 | eh_frame = elf_section_eh_frame_entry (sec); |
12471 | if (ret && eh_frame && !eh_frame->gc_mark) | |
12472 | if (!_bfd_elf_gc_mark (info, eh_frame, gc_mark_hook)) | |
12473 | ret = FALSE; | |
12474 | ||
c152c796 AM |
12475 | return ret; |
12476 | } | |
12477 | ||
3c758495 TG |
12478 | /* Scan and mark sections in a special or debug section group. */ |
12479 | ||
12480 | static void | |
12481 | _bfd_elf_gc_mark_debug_special_section_group (asection *grp) | |
12482 | { | |
12483 | /* Point to first section of section group. */ | |
12484 | asection *ssec; | |
12485 | /* Used to iterate the section group. */ | |
12486 | asection *msec; | |
12487 | ||
12488 | bfd_boolean is_special_grp = TRUE; | |
12489 | bfd_boolean is_debug_grp = TRUE; | |
12490 | ||
12491 | /* First scan to see if group contains any section other than debug | |
12492 | and special section. */ | |
12493 | ssec = msec = elf_next_in_group (grp); | |
12494 | do | |
12495 | { | |
12496 | if ((msec->flags & SEC_DEBUGGING) == 0) | |
12497 | is_debug_grp = FALSE; | |
12498 | ||
12499 | if ((msec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) != 0) | |
12500 | is_special_grp = FALSE; | |
12501 | ||
12502 | msec = elf_next_in_group (msec); | |
12503 | } | |
12504 | while (msec != ssec); | |
12505 | ||
12506 | /* If this is a pure debug section group or pure special section group, | |
12507 | keep all sections in this group. */ | |
12508 | if (is_debug_grp || is_special_grp) | |
12509 | { | |
12510 | do | |
12511 | { | |
12512 | msec->gc_mark = 1; | |
12513 | msec = elf_next_in_group (msec); | |
12514 | } | |
12515 | while (msec != ssec); | |
12516 | } | |
12517 | } | |
12518 | ||
7f6ab9f8 AM |
12519 | /* Keep debug and special sections. */ |
12520 | ||
12521 | bfd_boolean | |
12522 | _bfd_elf_gc_mark_extra_sections (struct bfd_link_info *info, | |
12523 | elf_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED) | |
12524 | { | |
12525 | bfd *ibfd; | |
12526 | ||
c72f2fb2 | 12527 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
7f6ab9f8 AM |
12528 | { |
12529 | asection *isec; | |
12530 | bfd_boolean some_kept; | |
b40bf0a2 | 12531 | bfd_boolean debug_frag_seen; |
7f6ab9f8 AM |
12532 | |
12533 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
12534 | continue; | |
12535 | ||
b40bf0a2 NC |
12536 | /* Ensure all linker created sections are kept, |
12537 | see if any other section is already marked, | |
12538 | and note if we have any fragmented debug sections. */ | |
12539 | debug_frag_seen = some_kept = FALSE; | |
7f6ab9f8 AM |
12540 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
12541 | { | |
12542 | if ((isec->flags & SEC_LINKER_CREATED) != 0) | |
12543 | isec->gc_mark = 1; | |
12544 | else if (isec->gc_mark) | |
12545 | some_kept = TRUE; | |
b40bf0a2 NC |
12546 | |
12547 | if (debug_frag_seen == FALSE | |
12548 | && (isec->flags & SEC_DEBUGGING) | |
12549 | && CONST_STRNEQ (isec->name, ".debug_line.")) | |
12550 | debug_frag_seen = TRUE; | |
7f6ab9f8 AM |
12551 | } |
12552 | ||
12553 | /* If no section in this file will be kept, then we can | |
b40bf0a2 | 12554 | toss out the debug and special sections. */ |
7f6ab9f8 AM |
12555 | if (!some_kept) |
12556 | continue; | |
12557 | ||
12558 | /* Keep debug and special sections like .comment when they are | |
3c758495 TG |
12559 | not part of a group. Also keep section groups that contain |
12560 | just debug sections or special sections. */ | |
7f6ab9f8 | 12561 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
3c758495 TG |
12562 | { |
12563 | if ((isec->flags & SEC_GROUP) != 0) | |
12564 | _bfd_elf_gc_mark_debug_special_section_group (isec); | |
12565 | else if (((isec->flags & SEC_DEBUGGING) != 0 | |
12566 | || (isec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0) | |
12567 | && elf_next_in_group (isec) == NULL) | |
12568 | isec->gc_mark = 1; | |
12569 | } | |
b40bf0a2 NC |
12570 | |
12571 | if (! debug_frag_seen) | |
12572 | continue; | |
12573 | ||
12574 | /* Look for CODE sections which are going to be discarded, | |
12575 | and find and discard any fragmented debug sections which | |
12576 | are associated with that code section. */ | |
12577 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) | |
12578 | if ((isec->flags & SEC_CODE) != 0 | |
12579 | && isec->gc_mark == 0) | |
12580 | { | |
12581 | unsigned int ilen; | |
12582 | asection *dsec; | |
12583 | ||
12584 | ilen = strlen (isec->name); | |
12585 | ||
12586 | /* Association is determined by the name of the debug section | |
12587 | containing the name of the code section as a suffix. For | |
12588 | example .debug_line.text.foo is a debug section associated | |
12589 | with .text.foo. */ | |
12590 | for (dsec = ibfd->sections; dsec != NULL; dsec = dsec->next) | |
12591 | { | |
12592 | unsigned int dlen; | |
12593 | ||
12594 | if (dsec->gc_mark == 0 | |
12595 | || (dsec->flags & SEC_DEBUGGING) == 0) | |
12596 | continue; | |
12597 | ||
12598 | dlen = strlen (dsec->name); | |
12599 | ||
12600 | if (dlen > ilen | |
12601 | && strncmp (dsec->name + (dlen - ilen), | |
12602 | isec->name, ilen) == 0) | |
12603 | { | |
12604 | dsec->gc_mark = 0; | |
b40bf0a2 NC |
12605 | } |
12606 | } | |
12607 | } | |
7f6ab9f8 AM |
12608 | } |
12609 | return TRUE; | |
12610 | } | |
12611 | ||
c152c796 AM |
12612 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ |
12613 | ||
c17d87de NC |
12614 | struct elf_gc_sweep_symbol_info |
12615 | { | |
ccabcbe5 AM |
12616 | struct bfd_link_info *info; |
12617 | void (*hide_symbol) (struct bfd_link_info *, struct elf_link_hash_entry *, | |
12618 | bfd_boolean); | |
12619 | }; | |
12620 | ||
c152c796 | 12621 | static bfd_boolean |
ccabcbe5 | 12622 | elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *data) |
c152c796 | 12623 | { |
1d5316ab AM |
12624 | if (!h->mark |
12625 | && (((h->root.type == bfd_link_hash_defined | |
12626 | || h->root.type == bfd_link_hash_defweak) | |
c4621b33 | 12627 | && !((h->def_regular || ELF_COMMON_DEF_P (h)) |
6673f753 | 12628 | && h->root.u.def.section->gc_mark)) |
1d5316ab AM |
12629 | || h->root.type == bfd_link_hash_undefined |
12630 | || h->root.type == bfd_link_hash_undefweak)) | |
12631 | { | |
12632 | struct elf_gc_sweep_symbol_info *inf; | |
12633 | ||
12634 | inf = (struct elf_gc_sweep_symbol_info *) data; | |
ccabcbe5 | 12635 | (*inf->hide_symbol) (inf->info, h, TRUE); |
1d5316ab AM |
12636 | h->def_regular = 0; |
12637 | h->ref_regular = 0; | |
12638 | h->ref_regular_nonweak = 0; | |
ccabcbe5 | 12639 | } |
c152c796 AM |
12640 | |
12641 | return TRUE; | |
12642 | } | |
12643 | ||
12644 | /* The sweep phase of garbage collection. Remove all garbage sections. */ | |
12645 | ||
12646 | typedef bfd_boolean (*gc_sweep_hook_fn) | |
12647 | (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); | |
12648 | ||
12649 | static bfd_boolean | |
ccabcbe5 | 12650 | elf_gc_sweep (bfd *abfd, struct bfd_link_info *info) |
c152c796 AM |
12651 | { |
12652 | bfd *sub; | |
ccabcbe5 AM |
12653 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
12654 | gc_sweep_hook_fn gc_sweep_hook = bed->gc_sweep_hook; | |
12655 | unsigned long section_sym_count; | |
12656 | struct elf_gc_sweep_symbol_info sweep_info; | |
c152c796 | 12657 | |
c72f2fb2 | 12658 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
12659 | { |
12660 | asection *o; | |
12661 | ||
b19a8f85 L |
12662 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour |
12663 | || !(*bed->relocs_compatible) (sub->xvec, abfd->xvec)) | |
c152c796 AM |
12664 | continue; |
12665 | ||
12666 | for (o = sub->sections; o != NULL; o = o->next) | |
12667 | { | |
a33dafc3 L |
12668 | /* When any section in a section group is kept, we keep all |
12669 | sections in the section group. If the first member of | |
12670 | the section group is excluded, we will also exclude the | |
12671 | group section. */ | |
12672 | if (o->flags & SEC_GROUP) | |
12673 | { | |
12674 | asection *first = elf_next_in_group (o); | |
12675 | o->gc_mark = first->gc_mark; | |
12676 | } | |
c152c796 | 12677 | |
1e7eae0d | 12678 | if (o->gc_mark) |
c152c796 AM |
12679 | continue; |
12680 | ||
12681 | /* Skip sweeping sections already excluded. */ | |
12682 | if (o->flags & SEC_EXCLUDE) | |
12683 | continue; | |
12684 | ||
12685 | /* Since this is early in the link process, it is simple | |
12686 | to remove a section from the output. */ | |
12687 | o->flags |= SEC_EXCLUDE; | |
12688 | ||
c55fe096 | 12689 | if (info->print_gc_sections && o->size != 0) |
c17d87de NC |
12690 | _bfd_error_handler (_("Removing unused section '%s' in file '%B'"), sub, o->name); |
12691 | ||
c152c796 AM |
12692 | /* But we also have to update some of the relocation |
12693 | info we collected before. */ | |
12694 | if (gc_sweep_hook | |
e8aaee2a | 12695 | && (o->flags & SEC_RELOC) != 0 |
9850436d AM |
12696 | && o->reloc_count != 0 |
12697 | && !((info->strip == strip_all || info->strip == strip_debugger) | |
12698 | && (o->flags & SEC_DEBUGGING) != 0) | |
e8aaee2a | 12699 | && !bfd_is_abs_section (o->output_section)) |
c152c796 AM |
12700 | { |
12701 | Elf_Internal_Rela *internal_relocs; | |
12702 | bfd_boolean r; | |
12703 | ||
12704 | internal_relocs | |
12705 | = _bfd_elf_link_read_relocs (o->owner, o, NULL, NULL, | |
12706 | info->keep_memory); | |
12707 | if (internal_relocs == NULL) | |
12708 | return FALSE; | |
12709 | ||
12710 | r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs); | |
12711 | ||
12712 | if (elf_section_data (o)->relocs != internal_relocs) | |
12713 | free (internal_relocs); | |
12714 | ||
12715 | if (!r) | |
12716 | return FALSE; | |
12717 | } | |
12718 | } | |
12719 | } | |
12720 | ||
12721 | /* Remove the symbols that were in the swept sections from the dynamic | |
12722 | symbol table. GCFIXME: Anyone know how to get them out of the | |
12723 | static symbol table as well? */ | |
ccabcbe5 AM |
12724 | sweep_info.info = info; |
12725 | sweep_info.hide_symbol = bed->elf_backend_hide_symbol; | |
12726 | elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol, | |
12727 | &sweep_info); | |
c152c796 | 12728 | |
ccabcbe5 | 12729 | _bfd_elf_link_renumber_dynsyms (abfd, info, §ion_sym_count); |
c152c796 AM |
12730 | return TRUE; |
12731 | } | |
12732 | ||
12733 | /* Propagate collected vtable information. This is called through | |
12734 | elf_link_hash_traverse. */ | |
12735 | ||
12736 | static bfd_boolean | |
12737 | elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry *h, void *okp) | |
12738 | { | |
c152c796 | 12739 | /* Those that are not vtables. */ |
f6e332e6 | 12740 | if (h->vtable == NULL || h->vtable->parent == NULL) |
c152c796 AM |
12741 | return TRUE; |
12742 | ||
12743 | /* Those vtables that do not have parents, we cannot merge. */ | |
f6e332e6 | 12744 | if (h->vtable->parent == (struct elf_link_hash_entry *) -1) |
c152c796 AM |
12745 | return TRUE; |
12746 | ||
12747 | /* If we've already been done, exit. */ | |
f6e332e6 | 12748 | if (h->vtable->used && h->vtable->used[-1]) |
c152c796 AM |
12749 | return TRUE; |
12750 | ||
12751 | /* Make sure the parent's table is up to date. */ | |
f6e332e6 | 12752 | elf_gc_propagate_vtable_entries_used (h->vtable->parent, okp); |
c152c796 | 12753 | |
f6e332e6 | 12754 | if (h->vtable->used == NULL) |
c152c796 AM |
12755 | { |
12756 | /* None of this table's entries were referenced. Re-use the | |
12757 | parent's table. */ | |
f6e332e6 AM |
12758 | h->vtable->used = h->vtable->parent->vtable->used; |
12759 | h->vtable->size = h->vtable->parent->vtable->size; | |
c152c796 AM |
12760 | } |
12761 | else | |
12762 | { | |
12763 | size_t n; | |
12764 | bfd_boolean *cu, *pu; | |
12765 | ||
12766 | /* Or the parent's entries into ours. */ | |
f6e332e6 | 12767 | cu = h->vtable->used; |
c152c796 | 12768 | cu[-1] = TRUE; |
f6e332e6 | 12769 | pu = h->vtable->parent->vtable->used; |
c152c796 AM |
12770 | if (pu != NULL) |
12771 | { | |
12772 | const struct elf_backend_data *bed; | |
12773 | unsigned int log_file_align; | |
12774 | ||
12775 | bed = get_elf_backend_data (h->root.u.def.section->owner); | |
12776 | log_file_align = bed->s->log_file_align; | |
f6e332e6 | 12777 | n = h->vtable->parent->vtable->size >> log_file_align; |
c152c796 AM |
12778 | while (n--) |
12779 | { | |
12780 | if (*pu) | |
12781 | *cu = TRUE; | |
12782 | pu++; | |
12783 | cu++; | |
12784 | } | |
12785 | } | |
12786 | } | |
12787 | ||
12788 | return TRUE; | |
12789 | } | |
12790 | ||
12791 | static bfd_boolean | |
12792 | elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry *h, void *okp) | |
12793 | { | |
12794 | asection *sec; | |
12795 | bfd_vma hstart, hend; | |
12796 | Elf_Internal_Rela *relstart, *relend, *rel; | |
12797 | const struct elf_backend_data *bed; | |
12798 | unsigned int log_file_align; | |
12799 | ||
c152c796 AM |
12800 | /* Take care of both those symbols that do not describe vtables as |
12801 | well as those that are not loaded. */ | |
f6e332e6 | 12802 | if (h->vtable == NULL || h->vtable->parent == NULL) |
c152c796 AM |
12803 | return TRUE; |
12804 | ||
12805 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
12806 | || h->root.type == bfd_link_hash_defweak); | |
12807 | ||
12808 | sec = h->root.u.def.section; | |
12809 | hstart = h->root.u.def.value; | |
12810 | hend = hstart + h->size; | |
12811 | ||
12812 | relstart = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL, TRUE); | |
12813 | if (!relstart) | |
12814 | return *(bfd_boolean *) okp = FALSE; | |
12815 | bed = get_elf_backend_data (sec->owner); | |
12816 | log_file_align = bed->s->log_file_align; | |
12817 | ||
12818 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; | |
12819 | ||
12820 | for (rel = relstart; rel < relend; ++rel) | |
12821 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
12822 | { | |
12823 | /* If the entry is in use, do nothing. */ | |
f6e332e6 AM |
12824 | if (h->vtable->used |
12825 | && (rel->r_offset - hstart) < h->vtable->size) | |
c152c796 AM |
12826 | { |
12827 | bfd_vma entry = (rel->r_offset - hstart) >> log_file_align; | |
f6e332e6 | 12828 | if (h->vtable->used[entry]) |
c152c796 AM |
12829 | continue; |
12830 | } | |
12831 | /* Otherwise, kill it. */ | |
12832 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
12833 | } | |
12834 | ||
12835 | return TRUE; | |
12836 | } | |
12837 | ||
87538722 AM |
12838 | /* Mark sections containing dynamically referenced symbols. When |
12839 | building shared libraries, we must assume that any visible symbol is | |
12840 | referenced. */ | |
715df9b8 | 12841 | |
64d03ab5 AM |
12842 | bfd_boolean |
12843 | bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry *h, void *inf) | |
715df9b8 | 12844 | { |
87538722 | 12845 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
d6f6f455 | 12846 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
87538722 | 12847 | |
715df9b8 EB |
12848 | if ((h->root.type == bfd_link_hash_defined |
12849 | || h->root.type == bfd_link_hash_defweak) | |
87538722 | 12850 | && (h->ref_dynamic |
c4621b33 | 12851 | || ((h->def_regular || ELF_COMMON_DEF_P (h)) |
87538722 | 12852 | && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL |
fd91d419 | 12853 | && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN |
0e1862bb | 12854 | && (!bfd_link_executable (info) |
b407645f AM |
12855 | || info->export_dynamic |
12856 | || (h->dynamic | |
12857 | && d != NULL | |
12858 | && (*d->match) (&d->head, NULL, h->root.root.string))) | |
422f1182 | 12859 | && (h->versioned >= versioned |
54e8959c L |
12860 | || !bfd_hide_sym_by_version (info->version_info, |
12861 | h->root.root.string))))) | |
715df9b8 EB |
12862 | h->root.u.def.section->flags |= SEC_KEEP; |
12863 | ||
12864 | return TRUE; | |
12865 | } | |
3b36f7e6 | 12866 | |
74f0fb50 AM |
12867 | /* Keep all sections containing symbols undefined on the command-line, |
12868 | and the section containing the entry symbol. */ | |
12869 | ||
12870 | void | |
12871 | _bfd_elf_gc_keep (struct bfd_link_info *info) | |
12872 | { | |
12873 | struct bfd_sym_chain *sym; | |
12874 | ||
12875 | for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) | |
12876 | { | |
12877 | struct elf_link_hash_entry *h; | |
12878 | ||
12879 | h = elf_link_hash_lookup (elf_hash_table (info), sym->name, | |
12880 | FALSE, FALSE, FALSE); | |
12881 | ||
12882 | if (h != NULL | |
12883 | && (h->root.type == bfd_link_hash_defined | |
12884 | || h->root.type == bfd_link_hash_defweak) | |
12885 | && !bfd_is_abs_section (h->root.u.def.section)) | |
12886 | h->root.u.def.section->flags |= SEC_KEEP; | |
12887 | } | |
12888 | } | |
12889 | ||
2f0c68f2 CM |
12890 | bfd_boolean |
12891 | bfd_elf_parse_eh_frame_entries (bfd *abfd ATTRIBUTE_UNUSED, | |
12892 | struct bfd_link_info *info) | |
12893 | { | |
12894 | bfd *ibfd = info->input_bfds; | |
12895 | ||
12896 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
12897 | { | |
12898 | asection *sec; | |
12899 | struct elf_reloc_cookie cookie; | |
12900 | ||
12901 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
12902 | continue; | |
12903 | ||
12904 | if (!init_reloc_cookie (&cookie, info, ibfd)) | |
12905 | return FALSE; | |
12906 | ||
12907 | for (sec = ibfd->sections; sec; sec = sec->next) | |
12908 | { | |
12909 | if (CONST_STRNEQ (bfd_section_name (ibfd, sec), ".eh_frame_entry") | |
12910 | && init_reloc_cookie_rels (&cookie, info, ibfd, sec)) | |
12911 | { | |
12912 | _bfd_elf_parse_eh_frame_entry (info, sec, &cookie); | |
12913 | fini_reloc_cookie_rels (&cookie, sec); | |
12914 | } | |
12915 | } | |
12916 | } | |
12917 | return TRUE; | |
12918 | } | |
12919 | ||
c152c796 AM |
12920 | /* Do mark and sweep of unused sections. */ |
12921 | ||
12922 | bfd_boolean | |
12923 | bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info) | |
12924 | { | |
12925 | bfd_boolean ok = TRUE; | |
12926 | bfd *sub; | |
6a5bb875 | 12927 | elf_gc_mark_hook_fn gc_mark_hook; |
64d03ab5 | 12928 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
da44f4e5 | 12929 | struct elf_link_hash_table *htab; |
c152c796 | 12930 | |
64d03ab5 | 12931 | if (!bed->can_gc_sections |
715df9b8 | 12932 | || !is_elf_hash_table (info->hash)) |
c152c796 AM |
12933 | { |
12934 | (*_bfd_error_handler)(_("Warning: gc-sections option ignored")); | |
12935 | return TRUE; | |
12936 | } | |
12937 | ||
74f0fb50 | 12938 | bed->gc_keep (info); |
da44f4e5 | 12939 | htab = elf_hash_table (info); |
74f0fb50 | 12940 | |
9d0a14d3 RS |
12941 | /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section |
12942 | at the .eh_frame section if we can mark the FDEs individually. */ | |
2f0c68f2 CM |
12943 | for (sub = info->input_bfds; |
12944 | info->eh_frame_hdr_type != COMPACT_EH_HDR && sub != NULL; | |
12945 | sub = sub->link.next) | |
9d0a14d3 RS |
12946 | { |
12947 | asection *sec; | |
12948 | struct elf_reloc_cookie cookie; | |
12949 | ||
12950 | sec = bfd_get_section_by_name (sub, ".eh_frame"); | |
9a2a56cc | 12951 | while (sec && init_reloc_cookie_for_section (&cookie, info, sec)) |
9d0a14d3 RS |
12952 | { |
12953 | _bfd_elf_parse_eh_frame (sub, info, sec, &cookie); | |
9a2a56cc AM |
12954 | if (elf_section_data (sec)->sec_info |
12955 | && (sec->flags & SEC_LINKER_CREATED) == 0) | |
9d0a14d3 RS |
12956 | elf_eh_frame_section (sub) = sec; |
12957 | fini_reloc_cookie_for_section (&cookie, sec); | |
199af150 | 12958 | sec = bfd_get_next_section_by_name (NULL, sec); |
9d0a14d3 RS |
12959 | } |
12960 | } | |
9d0a14d3 | 12961 | |
c152c796 | 12962 | /* Apply transitive closure to the vtable entry usage info. */ |
da44f4e5 | 12963 | elf_link_hash_traverse (htab, elf_gc_propagate_vtable_entries_used, &ok); |
c152c796 AM |
12964 | if (!ok) |
12965 | return FALSE; | |
12966 | ||
12967 | /* Kill the vtable relocations that were not used. */ | |
da44f4e5 | 12968 | elf_link_hash_traverse (htab, elf_gc_smash_unused_vtentry_relocs, &ok); |
c152c796 AM |
12969 | if (!ok) |
12970 | return FALSE; | |
12971 | ||
715df9b8 | 12972 | /* Mark dynamically referenced symbols. */ |
da44f4e5 AM |
12973 | if (htab->dynamic_sections_created) |
12974 | elf_link_hash_traverse (htab, bed->gc_mark_dynamic_ref, info); | |
c152c796 | 12975 | |
715df9b8 | 12976 | /* Grovel through relocs to find out who stays ... */ |
64d03ab5 | 12977 | gc_mark_hook = bed->gc_mark_hook; |
c72f2fb2 | 12978 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
12979 | { |
12980 | asection *o; | |
12981 | ||
b19a8f85 L |
12982 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour |
12983 | || !(*bed->relocs_compatible) (sub->xvec, abfd->xvec)) | |
c152c796 AM |
12984 | continue; |
12985 | ||
7f6ab9f8 AM |
12986 | /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep). |
12987 | Also treat note sections as a root, if the section is not part | |
12988 | of a group. */ | |
c152c796 | 12989 | for (o = sub->sections; o != NULL; o = o->next) |
7f6ab9f8 AM |
12990 | if (!o->gc_mark |
12991 | && (o->flags & SEC_EXCLUDE) == 0 | |
24007750 | 12992 | && ((o->flags & SEC_KEEP) != 0 |
7f6ab9f8 AM |
12993 | || (elf_section_data (o)->this_hdr.sh_type == SHT_NOTE |
12994 | && elf_next_in_group (o) == NULL ))) | |
12995 | { | |
12996 | if (!_bfd_elf_gc_mark (info, o, gc_mark_hook)) | |
12997 | return FALSE; | |
12998 | } | |
c152c796 AM |
12999 | } |
13000 | ||
6a5bb875 | 13001 | /* Allow the backend to mark additional target specific sections. */ |
7f6ab9f8 | 13002 | bed->gc_mark_extra_sections (info, gc_mark_hook); |
6a5bb875 | 13003 | |
c152c796 | 13004 | /* ... and mark SEC_EXCLUDE for those that go. */ |
ccabcbe5 | 13005 | return elf_gc_sweep (abfd, info); |
c152c796 AM |
13006 | } |
13007 | \f | |
13008 | /* Called from check_relocs to record the existence of a VTINHERIT reloc. */ | |
13009 | ||
13010 | bfd_boolean | |
13011 | bfd_elf_gc_record_vtinherit (bfd *abfd, | |
13012 | asection *sec, | |
13013 | struct elf_link_hash_entry *h, | |
13014 | bfd_vma offset) | |
13015 | { | |
13016 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
13017 | struct elf_link_hash_entry **search, *child; | |
13018 | bfd_size_type extsymcount; | |
13019 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13020 | ||
13021 | /* The sh_info field of the symtab header tells us where the | |
13022 | external symbols start. We don't care about the local symbols at | |
13023 | this point. */ | |
13024 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size / bed->s->sizeof_sym; | |
13025 | if (!elf_bad_symtab (abfd)) | |
13026 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
13027 | ||
13028 | sym_hashes = elf_sym_hashes (abfd); | |
13029 | sym_hashes_end = sym_hashes + extsymcount; | |
13030 | ||
13031 | /* Hunt down the child symbol, which is in this section at the same | |
13032 | offset as the relocation. */ | |
13033 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
13034 | { | |
13035 | if ((child = *search) != NULL | |
13036 | && (child->root.type == bfd_link_hash_defined | |
13037 | || child->root.type == bfd_link_hash_defweak) | |
13038 | && child->root.u.def.section == sec | |
13039 | && child->root.u.def.value == offset) | |
13040 | goto win; | |
13041 | } | |
13042 | ||
d003868e AM |
13043 | (*_bfd_error_handler) ("%B: %A+%lu: No symbol found for INHERIT", |
13044 | abfd, sec, (unsigned long) offset); | |
c152c796 AM |
13045 | bfd_set_error (bfd_error_invalid_operation); |
13046 | return FALSE; | |
13047 | ||
13048 | win: | |
f6e332e6 AM |
13049 | if (!child->vtable) |
13050 | { | |
ca4be51c AM |
13051 | child->vtable = ((struct elf_link_virtual_table_entry *) |
13052 | bfd_zalloc (abfd, sizeof (*child->vtable))); | |
f6e332e6 AM |
13053 | if (!child->vtable) |
13054 | return FALSE; | |
13055 | } | |
c152c796 AM |
13056 | if (!h) |
13057 | { | |
13058 | /* This *should* only be the absolute section. It could potentially | |
13059 | be that someone has defined a non-global vtable though, which | |
13060 | would be bad. It isn't worth paging in the local symbols to be | |
13061 | sure though; that case should simply be handled by the assembler. */ | |
13062 | ||
f6e332e6 | 13063 | child->vtable->parent = (struct elf_link_hash_entry *) -1; |
c152c796 AM |
13064 | } |
13065 | else | |
f6e332e6 | 13066 | child->vtable->parent = h; |
c152c796 AM |
13067 | |
13068 | return TRUE; | |
13069 | } | |
13070 | ||
13071 | /* Called from check_relocs to record the existence of a VTENTRY reloc. */ | |
13072 | ||
13073 | bfd_boolean | |
13074 | bfd_elf_gc_record_vtentry (bfd *abfd ATTRIBUTE_UNUSED, | |
13075 | asection *sec ATTRIBUTE_UNUSED, | |
13076 | struct elf_link_hash_entry *h, | |
13077 | bfd_vma addend) | |
13078 | { | |
13079 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13080 | unsigned int log_file_align = bed->s->log_file_align; | |
13081 | ||
f6e332e6 AM |
13082 | if (!h->vtable) |
13083 | { | |
ca4be51c AM |
13084 | h->vtable = ((struct elf_link_virtual_table_entry *) |
13085 | bfd_zalloc (abfd, sizeof (*h->vtable))); | |
f6e332e6 AM |
13086 | if (!h->vtable) |
13087 | return FALSE; | |
13088 | } | |
13089 | ||
13090 | if (addend >= h->vtable->size) | |
c152c796 AM |
13091 | { |
13092 | size_t size, bytes, file_align; | |
f6e332e6 | 13093 | bfd_boolean *ptr = h->vtable->used; |
c152c796 AM |
13094 | |
13095 | /* While the symbol is undefined, we have to be prepared to handle | |
13096 | a zero size. */ | |
13097 | file_align = 1 << log_file_align; | |
13098 | if (h->root.type == bfd_link_hash_undefined) | |
13099 | size = addend + file_align; | |
13100 | else | |
13101 | { | |
13102 | size = h->size; | |
13103 | if (addend >= size) | |
13104 | { | |
13105 | /* Oops! We've got a reference past the defined end of | |
13106 | the table. This is probably a bug -- shall we warn? */ | |
13107 | size = addend + file_align; | |
13108 | } | |
13109 | } | |
13110 | size = (size + file_align - 1) & -file_align; | |
13111 | ||
13112 | /* Allocate one extra entry for use as a "done" flag for the | |
13113 | consolidation pass. */ | |
13114 | bytes = ((size >> log_file_align) + 1) * sizeof (bfd_boolean); | |
13115 | ||
13116 | if (ptr) | |
13117 | { | |
a50b1753 | 13118 | ptr = (bfd_boolean *) bfd_realloc (ptr - 1, bytes); |
c152c796 AM |
13119 | |
13120 | if (ptr != NULL) | |
13121 | { | |
13122 | size_t oldbytes; | |
13123 | ||
f6e332e6 | 13124 | oldbytes = (((h->vtable->size >> log_file_align) + 1) |
c152c796 AM |
13125 | * sizeof (bfd_boolean)); |
13126 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); | |
13127 | } | |
13128 | } | |
13129 | else | |
a50b1753 | 13130 | ptr = (bfd_boolean *) bfd_zmalloc (bytes); |
c152c796 AM |
13131 | |
13132 | if (ptr == NULL) | |
13133 | return FALSE; | |
13134 | ||
13135 | /* And arrange for that done flag to be at index -1. */ | |
f6e332e6 AM |
13136 | h->vtable->used = ptr + 1; |
13137 | h->vtable->size = size; | |
c152c796 AM |
13138 | } |
13139 | ||
f6e332e6 | 13140 | h->vtable->used[addend >> log_file_align] = TRUE; |
c152c796 AM |
13141 | |
13142 | return TRUE; | |
13143 | } | |
13144 | ||
ae17ab41 CM |
13145 | /* Map an ELF section header flag to its corresponding string. */ |
13146 | typedef struct | |
13147 | { | |
13148 | char *flag_name; | |
13149 | flagword flag_value; | |
13150 | } elf_flags_to_name_table; | |
13151 | ||
13152 | static elf_flags_to_name_table elf_flags_to_names [] = | |
13153 | { | |
13154 | { "SHF_WRITE", SHF_WRITE }, | |
13155 | { "SHF_ALLOC", SHF_ALLOC }, | |
13156 | { "SHF_EXECINSTR", SHF_EXECINSTR }, | |
13157 | { "SHF_MERGE", SHF_MERGE }, | |
13158 | { "SHF_STRINGS", SHF_STRINGS }, | |
13159 | { "SHF_INFO_LINK", SHF_INFO_LINK}, | |
13160 | { "SHF_LINK_ORDER", SHF_LINK_ORDER}, | |
13161 | { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING}, | |
13162 | { "SHF_GROUP", SHF_GROUP }, | |
13163 | { "SHF_TLS", SHF_TLS }, | |
13164 | { "SHF_MASKOS", SHF_MASKOS }, | |
13165 | { "SHF_EXCLUDE", SHF_EXCLUDE }, | |
13166 | }; | |
13167 | ||
b9c361e0 JL |
13168 | /* Returns TRUE if the section is to be included, otherwise FALSE. */ |
13169 | bfd_boolean | |
ae17ab41 | 13170 | bfd_elf_lookup_section_flags (struct bfd_link_info *info, |
8b127cbc | 13171 | struct flag_info *flaginfo, |
b9c361e0 | 13172 | asection *section) |
ae17ab41 | 13173 | { |
8b127cbc | 13174 | const bfd_vma sh_flags = elf_section_flags (section); |
ae17ab41 | 13175 | |
8b127cbc | 13176 | if (!flaginfo->flags_initialized) |
ae17ab41 | 13177 | { |
8b127cbc AM |
13178 | bfd *obfd = info->output_bfd; |
13179 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
13180 | struct flag_info_list *tf = flaginfo->flag_list; | |
b9c361e0 JL |
13181 | int with_hex = 0; |
13182 | int without_hex = 0; | |
13183 | ||
8b127cbc | 13184 | for (tf = flaginfo->flag_list; tf != NULL; tf = tf->next) |
ae17ab41 | 13185 | { |
b9c361e0 | 13186 | unsigned i; |
8b127cbc | 13187 | flagword (*lookup) (char *); |
ae17ab41 | 13188 | |
8b127cbc AM |
13189 | lookup = bed->elf_backend_lookup_section_flags_hook; |
13190 | if (lookup != NULL) | |
ae17ab41 | 13191 | { |
8b127cbc | 13192 | flagword hexval = (*lookup) ((char *) tf->name); |
b9c361e0 JL |
13193 | |
13194 | if (hexval != 0) | |
13195 | { | |
13196 | if (tf->with == with_flags) | |
13197 | with_hex |= hexval; | |
13198 | else if (tf->with == without_flags) | |
13199 | without_hex |= hexval; | |
13200 | tf->valid = TRUE; | |
13201 | continue; | |
13202 | } | |
ae17ab41 | 13203 | } |
8b127cbc | 13204 | for (i = 0; i < ARRAY_SIZE (elf_flags_to_names); ++i) |
ae17ab41 | 13205 | { |
8b127cbc | 13206 | if (strcmp (tf->name, elf_flags_to_names[i].flag_name) == 0) |
b9c361e0 JL |
13207 | { |
13208 | if (tf->with == with_flags) | |
13209 | with_hex |= elf_flags_to_names[i].flag_value; | |
13210 | else if (tf->with == without_flags) | |
13211 | without_hex |= elf_flags_to_names[i].flag_value; | |
13212 | tf->valid = TRUE; | |
13213 | break; | |
13214 | } | |
13215 | } | |
8b127cbc | 13216 | if (!tf->valid) |
b9c361e0 | 13217 | { |
68ffbac6 | 13218 | info->callbacks->einfo |
8b127cbc | 13219 | (_("Unrecognized INPUT_SECTION_FLAG %s\n"), tf->name); |
b9c361e0 | 13220 | return FALSE; |
ae17ab41 CM |
13221 | } |
13222 | } | |
8b127cbc AM |
13223 | flaginfo->flags_initialized = TRUE; |
13224 | flaginfo->only_with_flags |= with_hex; | |
13225 | flaginfo->not_with_flags |= without_hex; | |
ae17ab41 | 13226 | } |
ae17ab41 | 13227 | |
8b127cbc | 13228 | if ((flaginfo->only_with_flags & sh_flags) != flaginfo->only_with_flags) |
b9c361e0 JL |
13229 | return FALSE; |
13230 | ||
8b127cbc | 13231 | if ((flaginfo->not_with_flags & sh_flags) != 0) |
b9c361e0 JL |
13232 | return FALSE; |
13233 | ||
13234 | return TRUE; | |
ae17ab41 CM |
13235 | } |
13236 | ||
c152c796 AM |
13237 | struct alloc_got_off_arg { |
13238 | bfd_vma gotoff; | |
10455f89 | 13239 | struct bfd_link_info *info; |
c152c796 AM |
13240 | }; |
13241 | ||
13242 | /* We need a special top-level link routine to convert got reference counts | |
13243 | to real got offsets. */ | |
13244 | ||
13245 | static bfd_boolean | |
13246 | elf_gc_allocate_got_offsets (struct elf_link_hash_entry *h, void *arg) | |
13247 | { | |
a50b1753 | 13248 | struct alloc_got_off_arg *gofarg = (struct alloc_got_off_arg *) arg; |
10455f89 HPN |
13249 | bfd *obfd = gofarg->info->output_bfd; |
13250 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
c152c796 | 13251 | |
c152c796 AM |
13252 | if (h->got.refcount > 0) |
13253 | { | |
13254 | h->got.offset = gofarg->gotoff; | |
10455f89 | 13255 | gofarg->gotoff += bed->got_elt_size (obfd, gofarg->info, h, NULL, 0); |
c152c796 AM |
13256 | } |
13257 | else | |
13258 | h->got.offset = (bfd_vma) -1; | |
13259 | ||
13260 | return TRUE; | |
13261 | } | |
13262 | ||
13263 | /* And an accompanying bit to work out final got entry offsets once | |
13264 | we're done. Should be called from final_link. */ | |
13265 | ||
13266 | bfd_boolean | |
13267 | bfd_elf_gc_common_finalize_got_offsets (bfd *abfd, | |
13268 | struct bfd_link_info *info) | |
13269 | { | |
13270 | bfd *i; | |
13271 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13272 | bfd_vma gotoff; | |
c152c796 AM |
13273 | struct alloc_got_off_arg gofarg; |
13274 | ||
10455f89 HPN |
13275 | BFD_ASSERT (abfd == info->output_bfd); |
13276 | ||
c152c796 AM |
13277 | if (! is_elf_hash_table (info->hash)) |
13278 | return FALSE; | |
13279 | ||
13280 | /* The GOT offset is relative to the .got section, but the GOT header is | |
13281 | put into the .got.plt section, if the backend uses it. */ | |
13282 | if (bed->want_got_plt) | |
13283 | gotoff = 0; | |
13284 | else | |
13285 | gotoff = bed->got_header_size; | |
13286 | ||
13287 | /* Do the local .got entries first. */ | |
c72f2fb2 | 13288 | for (i = info->input_bfds; i; i = i->link.next) |
c152c796 AM |
13289 | { |
13290 | bfd_signed_vma *local_got; | |
13291 | bfd_size_type j, locsymcount; | |
13292 | Elf_Internal_Shdr *symtab_hdr; | |
13293 | ||
13294 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) | |
13295 | continue; | |
13296 | ||
13297 | local_got = elf_local_got_refcounts (i); | |
13298 | if (!local_got) | |
13299 | continue; | |
13300 | ||
13301 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
13302 | if (elf_bad_symtab (i)) | |
13303 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
13304 | else | |
13305 | locsymcount = symtab_hdr->sh_info; | |
13306 | ||
13307 | for (j = 0; j < locsymcount; ++j) | |
13308 | { | |
13309 | if (local_got[j] > 0) | |
13310 | { | |
13311 | local_got[j] = gotoff; | |
10455f89 | 13312 | gotoff += bed->got_elt_size (abfd, info, NULL, i, j); |
c152c796 AM |
13313 | } |
13314 | else | |
13315 | local_got[j] = (bfd_vma) -1; | |
13316 | } | |
13317 | } | |
13318 | ||
13319 | /* Then the global .got entries. .plt refcounts are handled by | |
13320 | adjust_dynamic_symbol */ | |
13321 | gofarg.gotoff = gotoff; | |
10455f89 | 13322 | gofarg.info = info; |
c152c796 AM |
13323 | elf_link_hash_traverse (elf_hash_table (info), |
13324 | elf_gc_allocate_got_offsets, | |
13325 | &gofarg); | |
13326 | return TRUE; | |
13327 | } | |
13328 | ||
13329 | /* Many folk need no more in the way of final link than this, once | |
13330 | got entry reference counting is enabled. */ | |
13331 | ||
13332 | bfd_boolean | |
13333 | bfd_elf_gc_common_final_link (bfd *abfd, struct bfd_link_info *info) | |
13334 | { | |
13335 | if (!bfd_elf_gc_common_finalize_got_offsets (abfd, info)) | |
13336 | return FALSE; | |
13337 | ||
13338 | /* Invoke the regular ELF backend linker to do all the work. */ | |
13339 | return bfd_elf_final_link (abfd, info); | |
13340 | } | |
13341 | ||
13342 | bfd_boolean | |
13343 | bfd_elf_reloc_symbol_deleted_p (bfd_vma offset, void *cookie) | |
13344 | { | |
a50b1753 | 13345 | struct elf_reloc_cookie *rcookie = (struct elf_reloc_cookie *) cookie; |
c152c796 AM |
13346 | |
13347 | if (rcookie->bad_symtab) | |
13348 | rcookie->rel = rcookie->rels; | |
13349 | ||
13350 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
13351 | { | |
13352 | unsigned long r_symndx; | |
13353 | ||
13354 | if (! rcookie->bad_symtab) | |
13355 | if (rcookie->rel->r_offset > offset) | |
13356 | return FALSE; | |
13357 | if (rcookie->rel->r_offset != offset) | |
13358 | continue; | |
13359 | ||
13360 | r_symndx = rcookie->rel->r_info >> rcookie->r_sym_shift; | |
2c2fa401 | 13361 | if (r_symndx == STN_UNDEF) |
c152c796 AM |
13362 | return TRUE; |
13363 | ||
13364 | if (r_symndx >= rcookie->locsymcount | |
13365 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
13366 | { | |
13367 | struct elf_link_hash_entry *h; | |
13368 | ||
13369 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
13370 | ||
13371 | while (h->root.type == bfd_link_hash_indirect | |
13372 | || h->root.type == bfd_link_hash_warning) | |
13373 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
13374 | ||
13375 | if ((h->root.type == bfd_link_hash_defined | |
13376 | || h->root.type == bfd_link_hash_defweak) | |
5b69e357 AM |
13377 | && (h->root.u.def.section->owner != rcookie->abfd |
13378 | || h->root.u.def.section->kept_section != NULL | |
13379 | || discarded_section (h->root.u.def.section))) | |
c152c796 | 13380 | return TRUE; |
c152c796 AM |
13381 | } |
13382 | else | |
13383 | { | |
13384 | /* It's not a relocation against a global symbol, | |
13385 | but it could be a relocation against a local | |
13386 | symbol for a discarded section. */ | |
13387 | asection *isec; | |
13388 | Elf_Internal_Sym *isym; | |
13389 | ||
13390 | /* Need to: get the symbol; get the section. */ | |
13391 | isym = &rcookie->locsyms[r_symndx]; | |
cb33740c | 13392 | isec = bfd_section_from_elf_index (rcookie->abfd, isym->st_shndx); |
5b69e357 AM |
13393 | if (isec != NULL |
13394 | && (isec->kept_section != NULL | |
13395 | || discarded_section (isec))) | |
cb33740c | 13396 | return TRUE; |
c152c796 AM |
13397 | } |
13398 | return FALSE; | |
13399 | } | |
13400 | return FALSE; | |
13401 | } | |
13402 | ||
13403 | /* Discard unneeded references to discarded sections. | |
75938853 AM |
13404 | Returns -1 on error, 1 if any section's size was changed, 0 if |
13405 | nothing changed. This function assumes that the relocations are in | |
13406 | sorted order, which is true for all known assemblers. */ | |
c152c796 | 13407 | |
75938853 | 13408 | int |
c152c796 AM |
13409 | bfd_elf_discard_info (bfd *output_bfd, struct bfd_link_info *info) |
13410 | { | |
13411 | struct elf_reloc_cookie cookie; | |
18cd5bce | 13412 | asection *o; |
c152c796 | 13413 | bfd *abfd; |
75938853 | 13414 | int changed = 0; |
c152c796 AM |
13415 | |
13416 | if (info->traditional_format | |
13417 | || !is_elf_hash_table (info->hash)) | |
75938853 | 13418 | return 0; |
c152c796 | 13419 | |
18cd5bce AM |
13420 | o = bfd_get_section_by_name (output_bfd, ".stab"); |
13421 | if (o != NULL) | |
c152c796 | 13422 | { |
18cd5bce | 13423 | asection *i; |
c152c796 | 13424 | |
18cd5bce | 13425 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
8da3dbc5 | 13426 | { |
18cd5bce AM |
13427 | if (i->size == 0 |
13428 | || i->reloc_count == 0 | |
13429 | || i->sec_info_type != SEC_INFO_TYPE_STABS) | |
13430 | continue; | |
c152c796 | 13431 | |
18cd5bce AM |
13432 | abfd = i->owner; |
13433 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
13434 | continue; | |
c152c796 | 13435 | |
18cd5bce | 13436 | if (!init_reloc_cookie_for_section (&cookie, info, i)) |
75938853 | 13437 | return -1; |
c152c796 | 13438 | |
18cd5bce AM |
13439 | if (_bfd_discard_section_stabs (abfd, i, |
13440 | elf_section_data (i)->sec_info, | |
5241d853 RS |
13441 | bfd_elf_reloc_symbol_deleted_p, |
13442 | &cookie)) | |
75938853 | 13443 | changed = 1; |
18cd5bce AM |
13444 | |
13445 | fini_reloc_cookie_for_section (&cookie, i); | |
c152c796 | 13446 | } |
18cd5bce AM |
13447 | } |
13448 | ||
2f0c68f2 CM |
13449 | o = NULL; |
13450 | if (info->eh_frame_hdr_type != COMPACT_EH_HDR) | |
13451 | o = bfd_get_section_by_name (output_bfd, ".eh_frame"); | |
18cd5bce AM |
13452 | if (o != NULL) |
13453 | { | |
13454 | asection *i; | |
c152c796 | 13455 | |
18cd5bce | 13456 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
c152c796 | 13457 | { |
18cd5bce AM |
13458 | if (i->size == 0) |
13459 | continue; | |
13460 | ||
13461 | abfd = i->owner; | |
13462 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
13463 | continue; | |
13464 | ||
13465 | if (!init_reloc_cookie_for_section (&cookie, info, i)) | |
75938853 | 13466 | return -1; |
18cd5bce AM |
13467 | |
13468 | _bfd_elf_parse_eh_frame (abfd, info, i, &cookie); | |
13469 | if (_bfd_elf_discard_section_eh_frame (abfd, info, i, | |
c152c796 AM |
13470 | bfd_elf_reloc_symbol_deleted_p, |
13471 | &cookie)) | |
75938853 | 13472 | changed = 1; |
18cd5bce AM |
13473 | |
13474 | fini_reloc_cookie_for_section (&cookie, i); | |
c152c796 | 13475 | } |
18cd5bce | 13476 | } |
c152c796 | 13477 | |
18cd5bce AM |
13478 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next) |
13479 | { | |
13480 | const struct elf_backend_data *bed; | |
c152c796 | 13481 | |
18cd5bce AM |
13482 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
13483 | continue; | |
13484 | ||
13485 | bed = get_elf_backend_data (abfd); | |
13486 | ||
13487 | if (bed->elf_backend_discard_info != NULL) | |
13488 | { | |
13489 | if (!init_reloc_cookie (&cookie, info, abfd)) | |
75938853 | 13490 | return -1; |
18cd5bce AM |
13491 | |
13492 | if ((*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
75938853 | 13493 | changed = 1; |
18cd5bce AM |
13494 | |
13495 | fini_reloc_cookie (&cookie, abfd); | |
13496 | } | |
c152c796 AM |
13497 | } |
13498 | ||
2f0c68f2 CM |
13499 | if (info->eh_frame_hdr_type == COMPACT_EH_HDR) |
13500 | _bfd_elf_end_eh_frame_parsing (info); | |
13501 | ||
13502 | if (info->eh_frame_hdr_type | |
0e1862bb | 13503 | && !bfd_link_relocatable (info) |
c152c796 | 13504 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) |
75938853 | 13505 | changed = 1; |
c152c796 | 13506 | |
75938853 | 13507 | return changed; |
c152c796 | 13508 | } |
082b7297 | 13509 | |
43e1669b | 13510 | bfd_boolean |
0c511000 | 13511 | _bfd_elf_section_already_linked (bfd *abfd, |
c77ec726 | 13512 | asection *sec, |
c0f00686 | 13513 | struct bfd_link_info *info) |
082b7297 L |
13514 | { |
13515 | flagword flags; | |
c77ec726 | 13516 | const char *name, *key; |
082b7297 L |
13517 | struct bfd_section_already_linked *l; |
13518 | struct bfd_section_already_linked_hash_entry *already_linked_list; | |
0c511000 | 13519 | |
c77ec726 AM |
13520 | if (sec->output_section == bfd_abs_section_ptr) |
13521 | return FALSE; | |
0c511000 | 13522 | |
c77ec726 | 13523 | flags = sec->flags; |
0c511000 | 13524 | |
c77ec726 AM |
13525 | /* Return if it isn't a linkonce section. A comdat group section |
13526 | also has SEC_LINK_ONCE set. */ | |
13527 | if ((flags & SEC_LINK_ONCE) == 0) | |
13528 | return FALSE; | |
0c511000 | 13529 | |
c77ec726 AM |
13530 | /* Don't put group member sections on our list of already linked |
13531 | sections. They are handled as a group via their group section. */ | |
13532 | if (elf_sec_group (sec) != NULL) | |
13533 | return FALSE; | |
0c511000 | 13534 | |
c77ec726 AM |
13535 | /* For a SHT_GROUP section, use the group signature as the key. */ |
13536 | name = sec->name; | |
13537 | if ((flags & SEC_GROUP) != 0 | |
13538 | && elf_next_in_group (sec) != NULL | |
13539 | && elf_group_name (elf_next_in_group (sec)) != NULL) | |
13540 | key = elf_group_name (elf_next_in_group (sec)); | |
13541 | else | |
13542 | { | |
13543 | /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */ | |
0c511000 | 13544 | if (CONST_STRNEQ (name, ".gnu.linkonce.") |
c77ec726 AM |
13545 | && (key = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL) |
13546 | key++; | |
0c511000 | 13547 | else |
c77ec726 AM |
13548 | /* Must be a user linkonce section that doesn't follow gcc's |
13549 | naming convention. In this case we won't be matching | |
13550 | single member groups. */ | |
13551 | key = name; | |
0c511000 | 13552 | } |
6d2cd210 | 13553 | |
c77ec726 | 13554 | already_linked_list = bfd_section_already_linked_table_lookup (key); |
082b7297 L |
13555 | |
13556 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13557 | { | |
c2370991 | 13558 | /* We may have 2 different types of sections on the list: group |
c77ec726 AM |
13559 | sections with a signature of <key> (<key> is some string), |
13560 | and linkonce sections named .gnu.linkonce.<type>.<key>. | |
13561 | Match like sections. LTO plugin sections are an exception. | |
13562 | They are always named .gnu.linkonce.t.<key> and match either | |
13563 | type of section. */ | |
13564 | if (((flags & SEC_GROUP) == (l->sec->flags & SEC_GROUP) | |
13565 | && ((flags & SEC_GROUP) != 0 | |
13566 | || strcmp (name, l->sec->name) == 0)) | |
13567 | || (l->sec->owner->flags & BFD_PLUGIN) != 0) | |
082b7297 L |
13568 | { |
13569 | /* The section has already been linked. See if we should | |
6d2cd210 | 13570 | issue a warning. */ |
c77ec726 AM |
13571 | if (!_bfd_handle_already_linked (sec, l, info)) |
13572 | return FALSE; | |
082b7297 | 13573 | |
c77ec726 | 13574 | if (flags & SEC_GROUP) |
3d7f7666 | 13575 | { |
c77ec726 AM |
13576 | asection *first = elf_next_in_group (sec); |
13577 | asection *s = first; | |
3d7f7666 | 13578 | |
c77ec726 | 13579 | while (s != NULL) |
3d7f7666 | 13580 | { |
c77ec726 AM |
13581 | s->output_section = bfd_abs_section_ptr; |
13582 | /* Record which group discards it. */ | |
13583 | s->kept_section = l->sec; | |
13584 | s = elf_next_in_group (s); | |
13585 | /* These lists are circular. */ | |
13586 | if (s == first) | |
13587 | break; | |
3d7f7666 L |
13588 | } |
13589 | } | |
082b7297 | 13590 | |
43e1669b | 13591 | return TRUE; |
082b7297 L |
13592 | } |
13593 | } | |
13594 | ||
c77ec726 AM |
13595 | /* A single member comdat group section may be discarded by a |
13596 | linkonce section and vice versa. */ | |
13597 | if ((flags & SEC_GROUP) != 0) | |
3d7f7666 | 13598 | { |
c77ec726 | 13599 | asection *first = elf_next_in_group (sec); |
c2370991 | 13600 | |
c77ec726 AM |
13601 | if (first != NULL && elf_next_in_group (first) == first) |
13602 | /* Check this single member group against linkonce sections. */ | |
13603 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13604 | if ((l->sec->flags & SEC_GROUP) == 0 | |
13605 | && bfd_elf_match_symbols_in_sections (l->sec, first, info)) | |
13606 | { | |
13607 | first->output_section = bfd_abs_section_ptr; | |
13608 | first->kept_section = l->sec; | |
13609 | sec->output_section = bfd_abs_section_ptr; | |
13610 | break; | |
13611 | } | |
13612 | } | |
13613 | else | |
13614 | /* Check this linkonce section against single member groups. */ | |
13615 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13616 | if (l->sec->flags & SEC_GROUP) | |
6d2cd210 | 13617 | { |
c77ec726 | 13618 | asection *first = elf_next_in_group (l->sec); |
6d2cd210 | 13619 | |
c77ec726 AM |
13620 | if (first != NULL |
13621 | && elf_next_in_group (first) == first | |
13622 | && bfd_elf_match_symbols_in_sections (first, sec, info)) | |
13623 | { | |
13624 | sec->output_section = bfd_abs_section_ptr; | |
13625 | sec->kept_section = first; | |
13626 | break; | |
13627 | } | |
6d2cd210 | 13628 | } |
0c511000 | 13629 | |
c77ec726 AM |
13630 | /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F' |
13631 | referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4 | |
13632 | specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce' | |
13633 | prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its | |
13634 | matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded | |
13635 | but its `.gnu.linkonce.t.F' is discarded means we chose one-only | |
13636 | `.gnu.linkonce.t.F' section from a different bfd not requiring any | |
13637 | `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded. | |
13638 | The reverse order cannot happen as there is never a bfd with only the | |
13639 | `.gnu.linkonce.r.F' section. The order of sections in a bfd does not | |
13640 | matter as here were are looking only for cross-bfd sections. */ | |
13641 | ||
13642 | if ((flags & SEC_GROUP) == 0 && CONST_STRNEQ (name, ".gnu.linkonce.r.")) | |
13643 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13644 | if ((l->sec->flags & SEC_GROUP) == 0 | |
13645 | && CONST_STRNEQ (l->sec->name, ".gnu.linkonce.t.")) | |
13646 | { | |
13647 | if (abfd != l->sec->owner) | |
13648 | sec->output_section = bfd_abs_section_ptr; | |
13649 | break; | |
13650 | } | |
80c29487 | 13651 | |
082b7297 | 13652 | /* This is the first section with this name. Record it. */ |
c77ec726 | 13653 | if (!bfd_section_already_linked_table_insert (already_linked_list, sec)) |
bb6198d2 | 13654 | info->callbacks->einfo (_("%F%P: already_linked_table: %E\n")); |
c77ec726 | 13655 | return sec->output_section == bfd_abs_section_ptr; |
082b7297 | 13656 | } |
81e1b023 | 13657 | |
a4d8e49b L |
13658 | bfd_boolean |
13659 | _bfd_elf_common_definition (Elf_Internal_Sym *sym) | |
13660 | { | |
13661 | return sym->st_shndx == SHN_COMMON; | |
13662 | } | |
13663 | ||
13664 | unsigned int | |
13665 | _bfd_elf_common_section_index (asection *sec ATTRIBUTE_UNUSED) | |
13666 | { | |
13667 | return SHN_COMMON; | |
13668 | } | |
13669 | ||
13670 | asection * | |
13671 | _bfd_elf_common_section (asection *sec ATTRIBUTE_UNUSED) | |
13672 | { | |
13673 | return bfd_com_section_ptr; | |
13674 | } | |
10455f89 HPN |
13675 | |
13676 | bfd_vma | |
13677 | _bfd_elf_default_got_elt_size (bfd *abfd, | |
13678 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
13679 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, | |
13680 | bfd *ibfd ATTRIBUTE_UNUSED, | |
13681 | unsigned long symndx ATTRIBUTE_UNUSED) | |
13682 | { | |
13683 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13684 | return bed->s->arch_size / 8; | |
13685 | } | |
83bac4b0 NC |
13686 | |
13687 | /* Routines to support the creation of dynamic relocs. */ | |
13688 | ||
83bac4b0 NC |
13689 | /* Returns the name of the dynamic reloc section associated with SEC. */ |
13690 | ||
13691 | static const char * | |
13692 | get_dynamic_reloc_section_name (bfd * abfd, | |
13693 | asection * sec, | |
13694 | bfd_boolean is_rela) | |
13695 | { | |
ddcf1fcf BS |
13696 | char *name; |
13697 | const char *old_name = bfd_get_section_name (NULL, sec); | |
13698 | const char *prefix = is_rela ? ".rela" : ".rel"; | |
83bac4b0 | 13699 | |
ddcf1fcf | 13700 | if (old_name == NULL) |
83bac4b0 NC |
13701 | return NULL; |
13702 | ||
ddcf1fcf | 13703 | name = bfd_alloc (abfd, strlen (prefix) + strlen (old_name) + 1); |
68ffbac6 | 13704 | sprintf (name, "%s%s", prefix, old_name); |
83bac4b0 NC |
13705 | |
13706 | return name; | |
13707 | } | |
13708 | ||
13709 | /* Returns the dynamic reloc section associated with SEC. | |
13710 | If necessary compute the name of the dynamic reloc section based | |
13711 | on SEC's name (looked up in ABFD's string table) and the setting | |
13712 | of IS_RELA. */ | |
13713 | ||
13714 | asection * | |
13715 | _bfd_elf_get_dynamic_reloc_section (bfd * abfd, | |
13716 | asection * sec, | |
13717 | bfd_boolean is_rela) | |
13718 | { | |
13719 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
13720 | ||
13721 | if (reloc_sec == NULL) | |
13722 | { | |
13723 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
13724 | ||
13725 | if (name != NULL) | |
13726 | { | |
3d4d4302 | 13727 | reloc_sec = bfd_get_linker_section (abfd, name); |
83bac4b0 NC |
13728 | |
13729 | if (reloc_sec != NULL) | |
13730 | elf_section_data (sec)->sreloc = reloc_sec; | |
13731 | } | |
13732 | } | |
13733 | ||
13734 | return reloc_sec; | |
13735 | } | |
13736 | ||
13737 | /* Returns the dynamic reloc section associated with SEC. If the | |
13738 | section does not exist it is created and attached to the DYNOBJ | |
13739 | bfd and stored in the SRELOC field of SEC's elf_section_data | |
13740 | structure. | |
f8076f98 | 13741 | |
83bac4b0 NC |
13742 | ALIGNMENT is the alignment for the newly created section and |
13743 | IS_RELA defines whether the name should be .rela.<SEC's name> | |
13744 | or .rel.<SEC's name>. The section name is looked up in the | |
13745 | string table associated with ABFD. */ | |
13746 | ||
13747 | asection * | |
ca4be51c AM |
13748 | _bfd_elf_make_dynamic_reloc_section (asection *sec, |
13749 | bfd *dynobj, | |
13750 | unsigned int alignment, | |
13751 | bfd *abfd, | |
13752 | bfd_boolean is_rela) | |
83bac4b0 NC |
13753 | { |
13754 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
13755 | ||
13756 | if (reloc_sec == NULL) | |
13757 | { | |
13758 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
13759 | ||
13760 | if (name == NULL) | |
13761 | return NULL; | |
13762 | ||
3d4d4302 | 13763 | reloc_sec = bfd_get_linker_section (dynobj, name); |
83bac4b0 NC |
13764 | |
13765 | if (reloc_sec == NULL) | |
13766 | { | |
3d4d4302 AM |
13767 | flagword flags = (SEC_HAS_CONTENTS | SEC_READONLY |
13768 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
83bac4b0 NC |
13769 | if ((sec->flags & SEC_ALLOC) != 0) |
13770 | flags |= SEC_ALLOC | SEC_LOAD; | |
13771 | ||
3d4d4302 | 13772 | reloc_sec = bfd_make_section_anyway_with_flags (dynobj, name, flags); |
83bac4b0 NC |
13773 | if (reloc_sec != NULL) |
13774 | { | |
8877b5e5 AM |
13775 | /* _bfd_elf_get_sec_type_attr chooses a section type by |
13776 | name. Override as it may be wrong, eg. for a user | |
13777 | section named "auto" we'll get ".relauto" which is | |
13778 | seen to be a .rela section. */ | |
13779 | elf_section_type (reloc_sec) = is_rela ? SHT_RELA : SHT_REL; | |
83bac4b0 NC |
13780 | if (! bfd_set_section_alignment (dynobj, reloc_sec, alignment)) |
13781 | reloc_sec = NULL; | |
13782 | } | |
13783 | } | |
13784 | ||
13785 | elf_section_data (sec)->sreloc = reloc_sec; | |
13786 | } | |
13787 | ||
13788 | return reloc_sec; | |
13789 | } | |
1338dd10 | 13790 | |
bffebb6b AM |
13791 | /* Copy the ELF symbol type and other attributes for a linker script |
13792 | assignment from HSRC to HDEST. Generally this should be treated as | |
13793 | if we found a strong non-dynamic definition for HDEST (except that | |
13794 | ld ignores multiple definition errors). */ | |
1338dd10 | 13795 | void |
bffebb6b AM |
13796 | _bfd_elf_copy_link_hash_symbol_type (bfd *abfd, |
13797 | struct bfd_link_hash_entry *hdest, | |
13798 | struct bfd_link_hash_entry *hsrc) | |
1338dd10 | 13799 | { |
bffebb6b AM |
13800 | struct elf_link_hash_entry *ehdest = (struct elf_link_hash_entry *) hdest; |
13801 | struct elf_link_hash_entry *ehsrc = (struct elf_link_hash_entry *) hsrc; | |
13802 | Elf_Internal_Sym isym; | |
1338dd10 PB |
13803 | |
13804 | ehdest->type = ehsrc->type; | |
35fc36a8 | 13805 | ehdest->target_internal = ehsrc->target_internal; |
bffebb6b AM |
13806 | |
13807 | isym.st_other = ehsrc->other; | |
b8417128 | 13808 | elf_merge_st_other (abfd, ehdest, &isym, NULL, TRUE, FALSE); |
1338dd10 | 13809 | } |
351f65ca L |
13810 | |
13811 | /* Append a RELA relocation REL to section S in BFD. */ | |
13812 | ||
13813 | void | |
13814 | elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
13815 | { | |
13816 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13817 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); | |
13818 | BFD_ASSERT (loc + bed->s->sizeof_rela <= s->contents + s->size); | |
13819 | bed->s->swap_reloca_out (abfd, rel, loc); | |
13820 | } | |
13821 | ||
13822 | /* Append a REL relocation REL to section S in BFD. */ | |
13823 | ||
13824 | void | |
13825 | elf_append_rel (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
13826 | { | |
13827 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13828 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rel); | |
13829 | BFD_ASSERT (loc + bed->s->sizeof_rel <= s->contents + s->size); | |
59d6ffb2 | 13830 | bed->s->swap_reloc_out (abfd, rel, loc); |
351f65ca | 13831 | } |