Commit | Line | Data |
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252b5132 | 1 | /* ELF linking support for BFD. |
250d07de | 2 | Copyright (C) 1995-2021 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" |
252b5132 RH |
23 | #include "bfdlink.h" |
24 | #include "libbfd.h" | |
25 | #define ARCH_SIZE 0 | |
26 | #include "elf-bfd.h" | |
4ad4eba5 | 27 | #include "safe-ctype.h" |
ccf2f652 | 28 | #include "libiberty.h" |
66eb6687 | 29 | #include "objalloc.h" |
08ce1d72 | 30 | #if BFD_SUPPORTS_PLUGINS |
7d0b9ebc | 31 | #include "plugin-api.h" |
7dc3990e L |
32 | #include "plugin.h" |
33 | #endif | |
252b5132 | 34 | |
4b69ce9b | 35 | #include <limits.h> |
4b69ce9b AM |
36 | #ifndef CHAR_BIT |
37 | #define CHAR_BIT 8 | |
38 | #endif | |
39 | ||
28caa186 AM |
40 | /* This struct is used to pass information to routines called via |
41 | elf_link_hash_traverse which must return failure. */ | |
42 | ||
43 | struct elf_info_failed | |
44 | { | |
45 | struct bfd_link_info *info; | |
0a1b45a2 | 46 | bool failed; |
28caa186 AM |
47 | }; |
48 | ||
49 | /* This structure is used to pass information to | |
50 | _bfd_elf_link_find_version_dependencies. */ | |
51 | ||
52 | struct elf_find_verdep_info | |
53 | { | |
54 | /* General link information. */ | |
55 | struct bfd_link_info *info; | |
56 | /* The number of dependencies. */ | |
57 | unsigned int vers; | |
58 | /* Whether we had a failure. */ | |
0a1b45a2 | 59 | bool failed; |
28caa186 AM |
60 | }; |
61 | ||
0a1b45a2 | 62 | static bool _bfd_elf_fix_symbol_flags |
28caa186 AM |
63 | (struct elf_link_hash_entry *, struct elf_info_failed *); |
64 | ||
2f0c68f2 CM |
65 | asection * |
66 | _bfd_elf_section_for_symbol (struct elf_reloc_cookie *cookie, | |
67 | unsigned long r_symndx, | |
0a1b45a2 | 68 | bool discard) |
2f0c68f2 CM |
69 | { |
70 | if (r_symndx >= cookie->locsymcount | |
71 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
72 | { | |
73 | struct elf_link_hash_entry *h; | |
74 | ||
75 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; | |
76 | ||
77 | while (h->root.type == bfd_link_hash_indirect | |
78 | || h->root.type == bfd_link_hash_warning) | |
79 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
80 | ||
81 | if ((h->root.type == bfd_link_hash_defined | |
82 | || h->root.type == bfd_link_hash_defweak) | |
83 | && discarded_section (h->root.u.def.section)) | |
07d6d2b8 | 84 | return h->root.u.def.section; |
2f0c68f2 CM |
85 | else |
86 | return NULL; | |
87 | } | |
88 | else | |
89 | { | |
90 | /* It's not a relocation against a global symbol, | |
91 | but it could be a relocation against a local | |
92 | symbol for a discarded section. */ | |
93 | asection *isec; | |
94 | Elf_Internal_Sym *isym; | |
95 | ||
96 | /* Need to: get the symbol; get the section. */ | |
97 | isym = &cookie->locsyms[r_symndx]; | |
98 | isec = bfd_section_from_elf_index (cookie->abfd, isym->st_shndx); | |
99 | if (isec != NULL | |
100 | && discard ? discarded_section (isec) : 1) | |
101 | return isec; | |
102 | } | |
103 | return NULL; | |
104 | } | |
105 | ||
d98685ac AM |
106 | /* Define a symbol in a dynamic linkage section. */ |
107 | ||
108 | struct elf_link_hash_entry * | |
109 | _bfd_elf_define_linkage_sym (bfd *abfd, | |
110 | struct bfd_link_info *info, | |
111 | asection *sec, | |
112 | const char *name) | |
113 | { | |
114 | struct elf_link_hash_entry *h; | |
115 | struct bfd_link_hash_entry *bh; | |
ccabcbe5 | 116 | const struct elf_backend_data *bed; |
d98685ac | 117 | |
0a1b45a2 | 118 | h = elf_link_hash_lookup (elf_hash_table (info), name, false, false, false); |
d98685ac AM |
119 | if (h != NULL) |
120 | { | |
121 | /* Zap symbol defined in an as-needed lib that wasn't linked. | |
122 | This is a symptom of a larger problem: Absolute symbols | |
123 | defined in shared libraries can't be overridden, because we | |
124 | lose the link to the bfd which is via the symbol section. */ | |
125 | h->root.type = bfd_link_hash_new; | |
ad32986f | 126 | bh = &h->root; |
d98685ac | 127 | } |
ad32986f NC |
128 | else |
129 | bh = NULL; | |
d98685ac | 130 | |
cf18fda4 | 131 | bed = get_elf_backend_data (abfd); |
d98685ac | 132 | if (!_bfd_generic_link_add_one_symbol (info, abfd, name, BSF_GLOBAL, |
0a1b45a2 | 133 | sec, 0, NULL, false, bed->collect, |
d98685ac AM |
134 | &bh)) |
135 | return NULL; | |
136 | h = (struct elf_link_hash_entry *) bh; | |
ad32986f | 137 | BFD_ASSERT (h != NULL); |
d98685ac | 138 | h->def_regular = 1; |
e28df02b | 139 | h->non_elf = 0; |
12b2843a | 140 | h->root.linker_def = 1; |
d98685ac | 141 | h->type = STT_OBJECT; |
00b7642b AM |
142 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
143 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
d98685ac | 144 | |
0a1b45a2 | 145 | (*bed->elf_backend_hide_symbol) (info, h, true); |
d98685ac AM |
146 | return h; |
147 | } | |
148 | ||
0a1b45a2 | 149 | bool |
268b6b39 | 150 | _bfd_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) |
252b5132 RH |
151 | { |
152 | flagword flags; | |
aad5d350 | 153 | asection *s; |
252b5132 | 154 | struct elf_link_hash_entry *h; |
9c5bfbb7 | 155 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 156 | struct elf_link_hash_table *htab = elf_hash_table (info); |
252b5132 RH |
157 | |
158 | /* This function may be called more than once. */ | |
ce558b89 | 159 | if (htab->sgot != NULL) |
0a1b45a2 | 160 | return true; |
252b5132 | 161 | |
e5a52504 | 162 | flags = bed->dynamic_sec_flags; |
252b5132 | 163 | |
14b2f831 AM |
164 | s = bfd_make_section_anyway_with_flags (abfd, |
165 | (bed->rela_plts_and_copies_p | |
166 | ? ".rela.got" : ".rel.got"), | |
167 | (bed->dynamic_sec_flags | |
168 | | SEC_READONLY)); | |
6de2ae4a | 169 | if (s == NULL |
fd361982 | 170 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 171 | return false; |
6de2ae4a | 172 | htab->srelgot = s; |
252b5132 | 173 | |
14b2f831 | 174 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
64e77c6d | 175 | if (s == NULL |
fd361982 | 176 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 177 | return false; |
64e77c6d L |
178 | htab->sgot = s; |
179 | ||
252b5132 RH |
180 | if (bed->want_got_plt) |
181 | { | |
14b2f831 | 182 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
252b5132 | 183 | if (s == NULL |
fd361982 | 184 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 185 | return false; |
6de2ae4a | 186 | htab->sgotplt = s; |
252b5132 RH |
187 | } |
188 | ||
64e77c6d L |
189 | /* The first bit of the global offset table is the header. */ |
190 | s->size += bed->got_header_size; | |
191 | ||
2517a57f AM |
192 | if (bed->want_got_sym) |
193 | { | |
194 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got | |
195 | (or .got.plt) section. We don't do this in the linker script | |
196 | because we don't want to define the symbol if we are not creating | |
197 | a global offset table. */ | |
6de2ae4a L |
198 | h = _bfd_elf_define_linkage_sym (abfd, info, s, |
199 | "_GLOBAL_OFFSET_TABLE_"); | |
2517a57f | 200 | elf_hash_table (info)->hgot = h; |
d98685ac | 201 | if (h == NULL) |
0a1b45a2 | 202 | return false; |
2517a57f | 203 | } |
252b5132 | 204 | |
0a1b45a2 | 205 | return true; |
252b5132 RH |
206 | } |
207 | \f | |
7e9f0867 | 208 | /* Create a strtab to hold the dynamic symbol names. */ |
0a1b45a2 | 209 | static bool |
7e9f0867 AM |
210 | _bfd_elf_link_create_dynstrtab (bfd *abfd, struct bfd_link_info *info) |
211 | { | |
212 | struct elf_link_hash_table *hash_table; | |
213 | ||
214 | hash_table = elf_hash_table (info); | |
215 | if (hash_table->dynobj == NULL) | |
6cd255ca L |
216 | { |
217 | /* We may not set dynobj, an input file holding linker created | |
218 | dynamic sections to abfd, which may be a dynamic object with | |
219 | its own dynamic sections. We need to find a normal input file | |
220 | to hold linker created sections if possible. */ | |
221 | if ((abfd->flags & (DYNAMIC | BFD_PLUGIN)) != 0) | |
222 | { | |
223 | bfd *ibfd; | |
57963c05 | 224 | asection *s; |
6cd255ca | 225 | for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) |
6645479e | 226 | if ((ibfd->flags |
57963c05 AM |
227 | & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0 |
228 | && bfd_get_flavour (ibfd) == bfd_target_elf_flavour | |
4de5434b | 229 | && elf_object_id (ibfd) == elf_hash_table_id (hash_table) |
57963c05 AM |
230 | && !((s = ibfd->sections) != NULL |
231 | && s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)) | |
6cd255ca L |
232 | { |
233 | abfd = ibfd; | |
234 | break; | |
235 | } | |
236 | } | |
237 | hash_table->dynobj = abfd; | |
238 | } | |
7e9f0867 AM |
239 | |
240 | if (hash_table->dynstr == NULL) | |
241 | { | |
242 | hash_table->dynstr = _bfd_elf_strtab_init (); | |
243 | if (hash_table->dynstr == NULL) | |
0a1b45a2 | 244 | return false; |
7e9f0867 | 245 | } |
0a1b45a2 | 246 | return true; |
7e9f0867 AM |
247 | } |
248 | ||
45d6a902 AM |
249 | /* Create some sections which will be filled in with dynamic linking |
250 | information. ABFD is an input file which requires dynamic sections | |
251 | to be created. The dynamic sections take up virtual memory space | |
252 | when the final executable is run, so we need to create them before | |
253 | addresses are assigned to the output sections. We work out the | |
254 | actual contents and size of these sections later. */ | |
252b5132 | 255 | |
0a1b45a2 | 256 | bool |
268b6b39 | 257 | _bfd_elf_link_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 258 | { |
45d6a902 | 259 | flagword flags; |
91d6fa6a | 260 | asection *s; |
9c5bfbb7 | 261 | const struct elf_backend_data *bed; |
9637f6ef | 262 | struct elf_link_hash_entry *h; |
252b5132 | 263 | |
0eddce27 | 264 | if (! is_elf_hash_table (info->hash)) |
0a1b45a2 | 265 | return false; |
45d6a902 AM |
266 | |
267 | if (elf_hash_table (info)->dynamic_sections_created) | |
0a1b45a2 | 268 | return true; |
45d6a902 | 269 | |
7e9f0867 | 270 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
0a1b45a2 | 271 | return false; |
45d6a902 | 272 | |
7e9f0867 | 273 | abfd = elf_hash_table (info)->dynobj; |
e5a52504 MM |
274 | bed = get_elf_backend_data (abfd); |
275 | ||
276 | flags = bed->dynamic_sec_flags; | |
45d6a902 AM |
277 | |
278 | /* A dynamically linked executable has a .interp section, but a | |
279 | shared library does not. */ | |
9b8b325a | 280 | if (bfd_link_executable (info) && !info->nointerp) |
252b5132 | 281 | { |
14b2f831 AM |
282 | s = bfd_make_section_anyway_with_flags (abfd, ".interp", |
283 | flags | SEC_READONLY); | |
3496cb2a | 284 | if (s == NULL) |
0a1b45a2 | 285 | return false; |
45d6a902 | 286 | } |
bb0deeff | 287 | |
45d6a902 AM |
288 | /* Create sections to hold version informations. These are removed |
289 | if they are not needed. */ | |
14b2f831 AM |
290 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version_d", |
291 | flags | SEC_READONLY); | |
45d6a902 | 292 | if (s == NULL |
fd361982 | 293 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 294 | return false; |
45d6a902 | 295 | |
14b2f831 AM |
296 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version", |
297 | flags | SEC_READONLY); | |
45d6a902 | 298 | if (s == NULL |
fd361982 | 299 | || !bfd_set_section_alignment (s, 1)) |
0a1b45a2 | 300 | return false; |
45d6a902 | 301 | |
14b2f831 AM |
302 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version_r", |
303 | flags | SEC_READONLY); | |
45d6a902 | 304 | if (s == NULL |
fd361982 | 305 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 306 | return false; |
45d6a902 | 307 | |
14b2f831 AM |
308 | s = bfd_make_section_anyway_with_flags (abfd, ".dynsym", |
309 | flags | SEC_READONLY); | |
45d6a902 | 310 | if (s == NULL |
fd361982 | 311 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 312 | return false; |
cae1fbbb | 313 | elf_hash_table (info)->dynsym = s; |
45d6a902 | 314 | |
14b2f831 AM |
315 | s = bfd_make_section_anyway_with_flags (abfd, ".dynstr", |
316 | flags | SEC_READONLY); | |
3496cb2a | 317 | if (s == NULL) |
0a1b45a2 | 318 | return false; |
45d6a902 | 319 | |
14b2f831 | 320 | s = bfd_make_section_anyway_with_flags (abfd, ".dynamic", flags); |
45d6a902 | 321 | if (s == NULL |
fd361982 | 322 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 323 | return false; |
45d6a902 AM |
324 | |
325 | /* The special symbol _DYNAMIC is always set to the start of the | |
77cfaee6 AM |
326 | .dynamic section. We could set _DYNAMIC in a linker script, but we |
327 | only want to define it if we are, in fact, creating a .dynamic | |
328 | section. We don't want to define it if there is no .dynamic | |
329 | section, since on some ELF platforms the start up code examines it | |
330 | to decide how to initialize the process. */ | |
9637f6ef L |
331 | h = _bfd_elf_define_linkage_sym (abfd, info, s, "_DYNAMIC"); |
332 | elf_hash_table (info)->hdynamic = h; | |
333 | if (h == NULL) | |
0a1b45a2 | 334 | return false; |
45d6a902 | 335 | |
fdc90cb4 JJ |
336 | if (info->emit_hash) |
337 | { | |
14b2f831 AM |
338 | s = bfd_make_section_anyway_with_flags (abfd, ".hash", |
339 | flags | SEC_READONLY); | |
fdc90cb4 | 340 | if (s == NULL |
fd361982 | 341 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 342 | return false; |
fdc90cb4 JJ |
343 | elf_section_data (s)->this_hdr.sh_entsize = bed->s->sizeof_hash_entry; |
344 | } | |
345 | ||
f16a9783 | 346 | if (info->emit_gnu_hash && bed->record_xhash_symbol == NULL) |
fdc90cb4 | 347 | { |
14b2f831 AM |
348 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.hash", |
349 | flags | SEC_READONLY); | |
fdc90cb4 | 350 | if (s == NULL |
fd361982 | 351 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 352 | return false; |
fdc90cb4 JJ |
353 | /* For 64-bit ELF, .gnu.hash is a non-uniform entity size section: |
354 | 4 32-bit words followed by variable count of 64-bit words, then | |
355 | variable count of 32-bit words. */ | |
356 | if (bed->s->arch_size == 64) | |
357 | elf_section_data (s)->this_hdr.sh_entsize = 0; | |
358 | else | |
359 | elf_section_data (s)->this_hdr.sh_entsize = 4; | |
360 | } | |
45d6a902 AM |
361 | |
362 | /* Let the backend create the rest of the sections. This lets the | |
363 | backend set the right flags. The backend will normally create | |
364 | the .got and .plt sections. */ | |
894891db NC |
365 | if (bed->elf_backend_create_dynamic_sections == NULL |
366 | || ! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) | |
0a1b45a2 | 367 | return false; |
45d6a902 | 368 | |
0a1b45a2 | 369 | elf_hash_table (info)->dynamic_sections_created = true; |
45d6a902 | 370 | |
0a1b45a2 | 371 | return true; |
45d6a902 AM |
372 | } |
373 | ||
374 | /* Create dynamic sections when linking against a dynamic object. */ | |
375 | ||
0a1b45a2 | 376 | bool |
268b6b39 | 377 | _bfd_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
45d6a902 AM |
378 | { |
379 | flagword flags, pltflags; | |
7325306f | 380 | struct elf_link_hash_entry *h; |
45d6a902 | 381 | asection *s; |
9c5bfbb7 | 382 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 383 | struct elf_link_hash_table *htab = elf_hash_table (info); |
45d6a902 | 384 | |
252b5132 RH |
385 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
386 | .rel[a].bss sections. */ | |
e5a52504 | 387 | flags = bed->dynamic_sec_flags; |
252b5132 RH |
388 | |
389 | pltflags = flags; | |
252b5132 | 390 | if (bed->plt_not_loaded) |
6df4d94c MM |
391 | /* We do not clear SEC_ALLOC here because we still want the OS to |
392 | allocate space for the section; it's just that there's nothing | |
393 | to read in from the object file. */ | |
5d1634d7 | 394 | pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS); |
6df4d94c MM |
395 | else |
396 | pltflags |= SEC_ALLOC | SEC_CODE | SEC_LOAD; | |
252b5132 RH |
397 | if (bed->plt_readonly) |
398 | pltflags |= SEC_READONLY; | |
399 | ||
14b2f831 | 400 | s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); |
252b5132 | 401 | if (s == NULL |
fd361982 | 402 | || !bfd_set_section_alignment (s, bed->plt_alignment)) |
0a1b45a2 | 403 | return false; |
6de2ae4a | 404 | htab->splt = s; |
252b5132 | 405 | |
d98685ac AM |
406 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
407 | .plt section. */ | |
7325306f RS |
408 | if (bed->want_plt_sym) |
409 | { | |
410 | h = _bfd_elf_define_linkage_sym (abfd, info, s, | |
411 | "_PROCEDURE_LINKAGE_TABLE_"); | |
412 | elf_hash_table (info)->hplt = h; | |
413 | if (h == NULL) | |
0a1b45a2 | 414 | return false; |
7325306f | 415 | } |
252b5132 | 416 | |
14b2f831 AM |
417 | s = bfd_make_section_anyway_with_flags (abfd, |
418 | (bed->rela_plts_and_copies_p | |
419 | ? ".rela.plt" : ".rel.plt"), | |
420 | flags | SEC_READONLY); | |
252b5132 | 421 | if (s == NULL |
fd361982 | 422 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 423 | return false; |
6de2ae4a | 424 | htab->srelplt = s; |
252b5132 RH |
425 | |
426 | if (! _bfd_elf_create_got_section (abfd, info)) | |
0a1b45a2 | 427 | return false; |
252b5132 | 428 | |
3018b441 RH |
429 | if (bed->want_dynbss) |
430 | { | |
431 | /* The .dynbss section is a place to put symbols which are defined | |
432 | by dynamic objects, are referenced by regular objects, and are | |
433 | not functions. We must allocate space for them in the process | |
434 | image and use a R_*_COPY reloc to tell the dynamic linker to | |
435 | initialize them at run time. The linker script puts the .dynbss | |
436 | section into the .bss section of the final image. */ | |
14b2f831 | 437 | s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", |
afbf7e8e | 438 | SEC_ALLOC | SEC_LINKER_CREATED); |
3496cb2a | 439 | if (s == NULL) |
0a1b45a2 | 440 | return false; |
9d19e4fd | 441 | htab->sdynbss = s; |
252b5132 | 442 | |
5474d94f AM |
443 | if (bed->want_dynrelro) |
444 | { | |
445 | /* Similarly, but for symbols that were originally in read-only | |
afbf7e8e AM |
446 | sections. This section doesn't really need to have contents, |
447 | but make it like other .data.rel.ro sections. */ | |
5474d94f | 448 | s = bfd_make_section_anyway_with_flags (abfd, ".data.rel.ro", |
afbf7e8e | 449 | flags); |
5474d94f | 450 | if (s == NULL) |
0a1b45a2 | 451 | return false; |
5474d94f AM |
452 | htab->sdynrelro = s; |
453 | } | |
454 | ||
3018b441 | 455 | /* The .rel[a].bss section holds copy relocs. This section is not |
77cfaee6 AM |
456 | normally needed. We need to create it here, though, so that the |
457 | linker will map it to an output section. We can't just create it | |
458 | only if we need it, because we will not know whether we need it | |
459 | until we have seen all the input files, and the first time the | |
460 | main linker code calls BFD after examining all the input files | |
461 | (size_dynamic_sections) the input sections have already been | |
462 | mapped to the output sections. If the section turns out not to | |
463 | be needed, we can discard it later. We will never need this | |
464 | section when generating a shared object, since they do not use | |
465 | copy relocs. */ | |
9d19e4fd | 466 | if (bfd_link_executable (info)) |
3018b441 | 467 | { |
14b2f831 AM |
468 | s = bfd_make_section_anyway_with_flags (abfd, |
469 | (bed->rela_plts_and_copies_p | |
470 | ? ".rela.bss" : ".rel.bss"), | |
471 | flags | SEC_READONLY); | |
3018b441 | 472 | if (s == NULL |
fd361982 | 473 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 474 | return false; |
9d19e4fd | 475 | htab->srelbss = s; |
5474d94f AM |
476 | |
477 | if (bed->want_dynrelro) | |
478 | { | |
479 | s = (bfd_make_section_anyway_with_flags | |
480 | (abfd, (bed->rela_plts_and_copies_p | |
481 | ? ".rela.data.rel.ro" : ".rel.data.rel.ro"), | |
482 | flags | SEC_READONLY)); | |
483 | if (s == NULL | |
fd361982 | 484 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 485 | return false; |
5474d94f AM |
486 | htab->sreldynrelro = s; |
487 | } | |
3018b441 | 488 | } |
252b5132 RH |
489 | } |
490 | ||
0a1b45a2 | 491 | return true; |
252b5132 RH |
492 | } |
493 | \f | |
252b5132 RH |
494 | /* Record a new dynamic symbol. We record the dynamic symbols as we |
495 | read the input files, since we need to have a list of all of them | |
496 | before we can determine the final sizes of the output sections. | |
497 | Note that we may actually call this function even though we are not | |
498 | going to output any dynamic symbols; in some cases we know that a | |
499 | symbol should be in the dynamic symbol table, but only if there is | |
500 | one. */ | |
501 | ||
0a1b45a2 | 502 | bool |
c152c796 AM |
503 | bfd_elf_link_record_dynamic_symbol (struct bfd_link_info *info, |
504 | struct elf_link_hash_entry *h) | |
252b5132 RH |
505 | { |
506 | if (h->dynindx == -1) | |
507 | { | |
2b0f7ef9 | 508 | struct elf_strtab_hash *dynstr; |
68b6ddd0 | 509 | char *p; |
252b5132 | 510 | const char *name; |
ef53be89 | 511 | size_t indx; |
252b5132 | 512 | |
a896df97 AM |
513 | if (h->root.type == bfd_link_hash_defined |
514 | || h->root.type == bfd_link_hash_defweak) | |
515 | { | |
516 | /* An IR symbol should not be made dynamic. */ | |
517 | if (h->root.u.def.section != NULL | |
518 | && h->root.u.def.section->owner != NULL | |
519 | && (h->root.u.def.section->owner->flags & BFD_PLUGIN) != 0) | |
0a1b45a2 | 520 | return true; |
a896df97 AM |
521 | } |
522 | ||
7a13edea NC |
523 | /* XXX: The ABI draft says the linker must turn hidden and |
524 | internal symbols into STB_LOCAL symbols when producing the | |
525 | DSO. However, if ld.so honors st_other in the dynamic table, | |
526 | this would not be necessary. */ | |
527 | switch (ELF_ST_VISIBILITY (h->other)) | |
528 | { | |
529 | case STV_INTERNAL: | |
530 | case STV_HIDDEN: | |
9d6eee78 L |
531 | if (h->root.type != bfd_link_hash_undefined |
532 | && h->root.type != bfd_link_hash_undefweak) | |
38048eb9 | 533 | { |
f5385ebf | 534 | h->forced_local = 1; |
c8bad65e AM |
535 | if (!elf_hash_table (info)->is_relocatable_executable |
536 | || ((h->root.type == bfd_link_hash_defined | |
537 | || h->root.type == bfd_link_hash_defweak) | |
c4566785 | 538 | && h->root.u.def.section->owner != NULL |
c8bad65e AM |
539 | && h->root.u.def.section->owner->no_export) |
540 | || (h->root.type == bfd_link_hash_common | |
c4566785 | 541 | && h->root.u.c.p->section->owner != NULL |
c8bad65e | 542 | && h->root.u.c.p->section->owner->no_export)) |
0a1b45a2 | 543 | return true; |
7a13edea | 544 | } |
0444bdd4 | 545 | |
7a13edea NC |
546 | default: |
547 | break; | |
548 | } | |
549 | ||
252b5132 RH |
550 | h->dynindx = elf_hash_table (info)->dynsymcount; |
551 | ++elf_hash_table (info)->dynsymcount; | |
552 | ||
553 | dynstr = elf_hash_table (info)->dynstr; | |
554 | if (dynstr == NULL) | |
555 | { | |
556 | /* Create a strtab to hold the dynamic symbol names. */ | |
2b0f7ef9 | 557 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); |
252b5132 | 558 | if (dynstr == NULL) |
0a1b45a2 | 559 | return false; |
252b5132 RH |
560 | } |
561 | ||
562 | /* We don't put any version information in the dynamic string | |
aad5d350 | 563 | table. */ |
252b5132 RH |
564 | name = h->root.root.string; |
565 | p = strchr (name, ELF_VER_CHR); | |
68b6ddd0 AM |
566 | if (p != NULL) |
567 | /* We know that the p points into writable memory. In fact, | |
568 | there are only a few symbols that have read-only names, being | |
569 | those like _GLOBAL_OFFSET_TABLE_ that are created specially | |
570 | by the backends. Most symbols will have names pointing into | |
571 | an ELF string table read from a file, or to objalloc memory. */ | |
572 | *p = 0; | |
573 | ||
574 | indx = _bfd_elf_strtab_add (dynstr, name, p != NULL); | |
575 | ||
576 | if (p != NULL) | |
577 | *p = ELF_VER_CHR; | |
252b5132 | 578 | |
ef53be89 | 579 | if (indx == (size_t) -1) |
0a1b45a2 | 580 | return false; |
252b5132 RH |
581 | h->dynstr_index = indx; |
582 | } | |
583 | ||
0a1b45a2 | 584 | return true; |
252b5132 | 585 | } |
45d6a902 | 586 | \f |
55255dae L |
587 | /* Mark a symbol dynamic. */ |
588 | ||
28caa186 | 589 | static void |
55255dae | 590 | bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info *info, |
40b36307 L |
591 | struct elf_link_hash_entry *h, |
592 | Elf_Internal_Sym *sym) | |
55255dae | 593 | { |
40b36307 | 594 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
55255dae | 595 | |
40b36307 | 596 | /* It may be called more than once on the same H. */ |
0e1862bb | 597 | if(h->dynamic || bfd_link_relocatable (info)) |
55255dae L |
598 | return; |
599 | ||
40b36307 L |
600 | if ((info->dynamic_data |
601 | && (h->type == STT_OBJECT | |
b8871f35 | 602 | || h->type == STT_COMMON |
40b36307 | 603 | || (sym != NULL |
b8871f35 L |
604 | && (ELF_ST_TYPE (sym->st_info) == STT_OBJECT |
605 | || ELF_ST_TYPE (sym->st_info) == STT_COMMON)))) | |
a0c8462f | 606 | || (d != NULL |
73ec947d | 607 | && h->non_elf |
40b36307 | 608 | && (*d->match) (&d->head, NULL, h->root.root.string))) |
416c34d6 L |
609 | { |
610 | h->dynamic = 1; | |
611 | /* NB: If a symbol is made dynamic by --dynamic-list, it has | |
612 | non-IR reference. */ | |
613 | h->root.non_ir_ref_dynamic = 1; | |
614 | } | |
55255dae L |
615 | } |
616 | ||
45d6a902 AM |
617 | /* Record an assignment to a symbol made by a linker script. We need |
618 | this in case some dynamic object refers to this symbol. */ | |
619 | ||
0a1b45a2 | 620 | bool |
fe21a8fc L |
621 | bfd_elf_record_link_assignment (bfd *output_bfd, |
622 | struct bfd_link_info *info, | |
268b6b39 | 623 | const char *name, |
0a1b45a2 AM |
624 | bool provide, |
625 | bool hidden) | |
45d6a902 | 626 | { |
00cbee0a | 627 | struct elf_link_hash_entry *h, *hv; |
4ea42fb7 | 628 | struct elf_link_hash_table *htab; |
00cbee0a | 629 | const struct elf_backend_data *bed; |
45d6a902 | 630 | |
0eddce27 | 631 | if (!is_elf_hash_table (info->hash)) |
0a1b45a2 | 632 | return true; |
45d6a902 | 633 | |
4ea42fb7 | 634 | htab = elf_hash_table (info); |
0a1b45a2 | 635 | h = elf_link_hash_lookup (htab, name, !provide, true, false); |
45d6a902 | 636 | if (h == NULL) |
4ea42fb7 | 637 | return provide; |
45d6a902 | 638 | |
8e2a4f11 AM |
639 | if (h->root.type == bfd_link_hash_warning) |
640 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
641 | ||
0f550b3d L |
642 | if (h->versioned == unknown) |
643 | { | |
644 | /* Set versioned if symbol version is unknown. */ | |
645 | char *version = strrchr (name, ELF_VER_CHR); | |
646 | if (version) | |
647 | { | |
648 | if (version > name && version[-1] != ELF_VER_CHR) | |
649 | h->versioned = versioned_hidden; | |
650 | else | |
651 | h->versioned = versioned; | |
652 | } | |
653 | } | |
654 | ||
73ec947d AM |
655 | /* Symbols defined in a linker script but not referenced anywhere |
656 | else will have non_elf set. */ | |
657 | if (h->non_elf) | |
658 | { | |
659 | bfd_elf_link_mark_dynamic_symbol (info, h, NULL); | |
660 | h->non_elf = 0; | |
661 | } | |
662 | ||
00cbee0a | 663 | switch (h->root.type) |
77cfaee6 | 664 | { |
00cbee0a L |
665 | case bfd_link_hash_defined: |
666 | case bfd_link_hash_defweak: | |
667 | case bfd_link_hash_common: | |
668 | break; | |
669 | case bfd_link_hash_undefweak: | |
670 | case bfd_link_hash_undefined: | |
671 | /* Since we're defining the symbol, don't let it seem to have not | |
672 | been defined. record_dynamic_symbol and size_dynamic_sections | |
673 | may depend on this. */ | |
4ea42fb7 | 674 | h->root.type = bfd_link_hash_new; |
77cfaee6 AM |
675 | if (h->root.u.undef.next != NULL || htab->root.undefs_tail == &h->root) |
676 | bfd_link_repair_undef_list (&htab->root); | |
00cbee0a L |
677 | break; |
678 | case bfd_link_hash_new: | |
00cbee0a L |
679 | break; |
680 | case bfd_link_hash_indirect: | |
681 | /* We had a versioned symbol in a dynamic library. We make the | |
a0c8462f | 682 | the versioned symbol point to this one. */ |
00cbee0a L |
683 | bed = get_elf_backend_data (output_bfd); |
684 | hv = h; | |
685 | while (hv->root.type == bfd_link_hash_indirect | |
686 | || hv->root.type == bfd_link_hash_warning) | |
687 | hv = (struct elf_link_hash_entry *) hv->root.u.i.link; | |
688 | /* We don't need to update h->root.u since linker will set them | |
689 | later. */ | |
690 | h->root.type = bfd_link_hash_undefined; | |
691 | hv->root.type = bfd_link_hash_indirect; | |
692 | hv->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
693 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hv); | |
694 | break; | |
8e2a4f11 AM |
695 | default: |
696 | BFD_FAIL (); | |
0a1b45a2 | 697 | return false; |
55255dae | 698 | } |
45d6a902 AM |
699 | |
700 | /* If this symbol is being provided by the linker script, and it is | |
701 | currently defined by a dynamic object, but not by a regular | |
702 | object, then mark it as undefined so that the generic linker will | |
703 | force the correct value. */ | |
704 | if (provide | |
f5385ebf AM |
705 | && h->def_dynamic |
706 | && !h->def_regular) | |
45d6a902 AM |
707 | h->root.type = bfd_link_hash_undefined; |
708 | ||
48e30f52 L |
709 | /* If this symbol is currently defined by a dynamic object, but not |
710 | by a regular object, then clear out any version information because | |
711 | the symbol will not be associated with the dynamic object any | |
712 | more. */ | |
713 | if (h->def_dynamic && !h->def_regular) | |
b531344c MR |
714 | h->verinfo.verdef = NULL; |
715 | ||
716 | /* Make sure this symbol is not garbage collected. */ | |
717 | h->mark = 1; | |
45d6a902 | 718 | |
f5385ebf | 719 | h->def_regular = 1; |
45d6a902 | 720 | |
eb8476a6 | 721 | if (hidden) |
fe21a8fc | 722 | { |
91d6fa6a | 723 | bed = get_elf_backend_data (output_bfd); |
b8297068 AM |
724 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
725 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
0a1b45a2 | 726 | (*bed->elf_backend_hide_symbol) (info, h, true); |
fe21a8fc L |
727 | } |
728 | ||
6fa3860b PB |
729 | /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects |
730 | and executables. */ | |
0e1862bb | 731 | if (!bfd_link_relocatable (info) |
6fa3860b PB |
732 | && h->dynindx != -1 |
733 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
734 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) | |
735 | h->forced_local = 1; | |
736 | ||
f5385ebf AM |
737 | if ((h->def_dynamic |
738 | || h->ref_dynamic | |
6b3b0ab8 L |
739 | || bfd_link_dll (info) |
740 | || elf_hash_table (info)->is_relocatable_executable) | |
34a87bb0 | 741 | && !h->forced_local |
45d6a902 AM |
742 | && h->dynindx == -1) |
743 | { | |
c152c796 | 744 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
0a1b45a2 | 745 | return false; |
45d6a902 AM |
746 | |
747 | /* If this is a weak defined symbol, and we know a corresponding | |
748 | real symbol from the same dynamic object, make sure the real | |
749 | symbol is also made into a dynamic symbol. */ | |
60d67dc8 | 750 | if (h->is_weakalias) |
45d6a902 | 751 | { |
60d67dc8 AM |
752 | struct elf_link_hash_entry *def = weakdef (h); |
753 | ||
754 | if (def->dynindx == -1 | |
755 | && !bfd_elf_link_record_dynamic_symbol (info, def)) | |
0a1b45a2 | 756 | return false; |
45d6a902 AM |
757 | } |
758 | } | |
759 | ||
0a1b45a2 | 760 | return true; |
45d6a902 | 761 | } |
42751cf3 | 762 | |
8c58d23b AM |
763 | /* Record a new local dynamic symbol. Returns 0 on failure, 1 on |
764 | success, and 2 on a failure caused by attempting to record a symbol | |
765 | in a discarded section, eg. a discarded link-once section symbol. */ | |
766 | ||
767 | int | |
c152c796 AM |
768 | bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info *info, |
769 | bfd *input_bfd, | |
770 | long input_indx) | |
8c58d23b | 771 | { |
986f0783 | 772 | size_t amt; |
8c58d23b AM |
773 | struct elf_link_local_dynamic_entry *entry; |
774 | struct elf_link_hash_table *eht; | |
775 | struct elf_strtab_hash *dynstr; | |
ef53be89 | 776 | size_t dynstr_index; |
8c58d23b AM |
777 | char *name; |
778 | Elf_External_Sym_Shndx eshndx; | |
779 | char esym[sizeof (Elf64_External_Sym)]; | |
780 | ||
0eddce27 | 781 | if (! is_elf_hash_table (info->hash)) |
8c58d23b AM |
782 | return 0; |
783 | ||
784 | /* See if the entry exists already. */ | |
785 | for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next) | |
786 | if (entry->input_bfd == input_bfd && entry->input_indx == input_indx) | |
787 | return 1; | |
788 | ||
789 | amt = sizeof (*entry); | |
a50b1753 | 790 | entry = (struct elf_link_local_dynamic_entry *) bfd_alloc (input_bfd, amt); |
8c58d23b AM |
791 | if (entry == NULL) |
792 | return 0; | |
793 | ||
794 | /* Go find the symbol, so that we can find it's name. */ | |
795 | if (!bfd_elf_get_elf_syms (input_bfd, &elf_tdata (input_bfd)->symtab_hdr, | |
268b6b39 | 796 | 1, input_indx, &entry->isym, esym, &eshndx)) |
8c58d23b AM |
797 | { |
798 | bfd_release (input_bfd, entry); | |
799 | return 0; | |
800 | } | |
801 | ||
802 | if (entry->isym.st_shndx != SHN_UNDEF | |
4fbb74a6 | 803 | && entry->isym.st_shndx < SHN_LORESERVE) |
8c58d23b AM |
804 | { |
805 | asection *s; | |
806 | ||
807 | s = bfd_section_from_elf_index (input_bfd, entry->isym.st_shndx); | |
808 | if (s == NULL || bfd_is_abs_section (s->output_section)) | |
809 | { | |
810 | /* We can still bfd_release here as nothing has done another | |
811 | bfd_alloc. We can't do this later in this function. */ | |
812 | bfd_release (input_bfd, entry); | |
813 | return 2; | |
814 | } | |
815 | } | |
816 | ||
817 | name = (bfd_elf_string_from_elf_section | |
818 | (input_bfd, elf_tdata (input_bfd)->symtab_hdr.sh_link, | |
819 | entry->isym.st_name)); | |
820 | ||
821 | dynstr = elf_hash_table (info)->dynstr; | |
822 | if (dynstr == NULL) | |
823 | { | |
824 | /* Create a strtab to hold the dynamic symbol names. */ | |
825 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); | |
826 | if (dynstr == NULL) | |
827 | return 0; | |
828 | } | |
829 | ||
0a1b45a2 | 830 | dynstr_index = _bfd_elf_strtab_add (dynstr, name, false); |
ef53be89 | 831 | if (dynstr_index == (size_t) -1) |
8c58d23b AM |
832 | return 0; |
833 | entry->isym.st_name = dynstr_index; | |
834 | ||
835 | eht = elf_hash_table (info); | |
836 | ||
837 | entry->next = eht->dynlocal; | |
838 | eht->dynlocal = entry; | |
839 | entry->input_bfd = input_bfd; | |
840 | entry->input_indx = input_indx; | |
841 | eht->dynsymcount++; | |
842 | ||
843 | /* Whatever binding the symbol had before, it's now local. */ | |
844 | entry->isym.st_info | |
845 | = ELF_ST_INFO (STB_LOCAL, ELF_ST_TYPE (entry->isym.st_info)); | |
846 | ||
847 | /* The dynindx will be set at the end of size_dynamic_sections. */ | |
848 | ||
849 | return 1; | |
850 | } | |
851 | ||
30b30c21 | 852 | /* Return the dynindex of a local dynamic symbol. */ |
42751cf3 | 853 | |
30b30c21 | 854 | long |
268b6b39 AM |
855 | _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info *info, |
856 | bfd *input_bfd, | |
857 | long input_indx) | |
30b30c21 RH |
858 | { |
859 | struct elf_link_local_dynamic_entry *e; | |
860 | ||
861 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
862 | if (e->input_bfd == input_bfd && e->input_indx == input_indx) | |
863 | return e->dynindx; | |
864 | return -1; | |
865 | } | |
866 | ||
867 | /* This function is used to renumber the dynamic symbols, if some of | |
868 | them are removed because they are marked as local. This is called | |
869 | via elf_link_hash_traverse. */ | |
870 | ||
0a1b45a2 | 871 | static bool |
268b6b39 AM |
872 | elf_link_renumber_hash_table_dynsyms (struct elf_link_hash_entry *h, |
873 | void *data) | |
42751cf3 | 874 | { |
a50b1753 | 875 | size_t *count = (size_t *) data; |
30b30c21 | 876 | |
6fa3860b | 877 | if (h->forced_local) |
0a1b45a2 | 878 | return true; |
6fa3860b PB |
879 | |
880 | if (h->dynindx != -1) | |
881 | h->dynindx = ++(*count); | |
882 | ||
0a1b45a2 | 883 | return true; |
6fa3860b PB |
884 | } |
885 | ||
886 | ||
887 | /* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with | |
888 | STB_LOCAL binding. */ | |
889 | ||
0a1b45a2 | 890 | static bool |
6fa3860b PB |
891 | elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry *h, |
892 | void *data) | |
893 | { | |
a50b1753 | 894 | size_t *count = (size_t *) data; |
6fa3860b | 895 | |
6fa3860b | 896 | if (!h->forced_local) |
0a1b45a2 | 897 | return true; |
6fa3860b | 898 | |
42751cf3 | 899 | if (h->dynindx != -1) |
30b30c21 RH |
900 | h->dynindx = ++(*count); |
901 | ||
0a1b45a2 | 902 | return true; |
42751cf3 | 903 | } |
30b30c21 | 904 | |
aee6f5b4 AO |
905 | /* Return true if the dynamic symbol for a given section should be |
906 | omitted when creating a shared library. */ | |
0a1b45a2 | 907 | bool |
d00dd7dc AM |
908 | _bfd_elf_omit_section_dynsym_default (bfd *output_bfd ATTRIBUTE_UNUSED, |
909 | struct bfd_link_info *info, | |
910 | asection *p) | |
aee6f5b4 | 911 | { |
74541ad4 | 912 | struct elf_link_hash_table *htab; |
ca55926c | 913 | asection *ip; |
74541ad4 | 914 | |
aee6f5b4 AO |
915 | switch (elf_section_data (p)->this_hdr.sh_type) |
916 | { | |
917 | case SHT_PROGBITS: | |
918 | case SHT_NOBITS: | |
919 | /* If sh_type is yet undecided, assume it could be | |
920 | SHT_PROGBITS/SHT_NOBITS. */ | |
921 | case SHT_NULL: | |
74541ad4 | 922 | htab = elf_hash_table (info); |
74541ad4 AM |
923 | if (htab->text_index_section != NULL) |
924 | return p != htab->text_index_section && p != htab->data_index_section; | |
925 | ||
ca55926c | 926 | return (htab->dynobj != NULL |
3d4d4302 | 927 | && (ip = bfd_get_linker_section (htab->dynobj, p->name)) != NULL |
ca55926c | 928 | && ip->output_section == p); |
aee6f5b4 AO |
929 | |
930 | /* There shouldn't be section relative relocations | |
931 | against any other section. */ | |
932 | default: | |
0a1b45a2 | 933 | return true; |
aee6f5b4 AO |
934 | } |
935 | } | |
936 | ||
0a1b45a2 | 937 | bool |
d00dd7dc AM |
938 | _bfd_elf_omit_section_dynsym_all |
939 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
940 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
941 | asection *p ATTRIBUTE_UNUSED) | |
942 | { | |
0a1b45a2 | 943 | return true; |
d00dd7dc AM |
944 | } |
945 | ||
062e2358 | 946 | /* Assign dynsym indices. In a shared library we generate a section |
6fa3860b PB |
947 | symbol for each output section, which come first. Next come symbols |
948 | which have been forced to local binding. Then all of the back-end | |
949 | allocated local dynamic syms, followed by the rest of the global | |
63f452a8 AM |
950 | symbols. If SECTION_SYM_COUNT is NULL, section dynindx is not set. |
951 | (This prevents the early call before elf_backend_init_index_section | |
952 | and strip_excluded_output_sections setting dynindx for sections | |
953 | that are stripped.) */ | |
30b30c21 | 954 | |
554220db AM |
955 | static unsigned long |
956 | _bfd_elf_link_renumber_dynsyms (bfd *output_bfd, | |
957 | struct bfd_link_info *info, | |
958 | unsigned long *section_sym_count) | |
30b30c21 RH |
959 | { |
960 | unsigned long dynsymcount = 0; | |
0a1b45a2 | 961 | bool do_sec = section_sym_count != NULL; |
30b30c21 | 962 | |
0e1862bb L |
963 | if (bfd_link_pic (info) |
964 | || elf_hash_table (info)->is_relocatable_executable) | |
30b30c21 | 965 | { |
aee6f5b4 | 966 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
30b30c21 RH |
967 | asection *p; |
968 | for (p = output_bfd->sections; p ; p = p->next) | |
8c37241b | 969 | if ((p->flags & SEC_EXCLUDE) == 0 |
aee6f5b4 | 970 | && (p->flags & SEC_ALLOC) != 0 |
7f923b7f | 971 | && elf_hash_table (info)->dynamic_relocs |
aee6f5b4 | 972 | && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p)) |
63f452a8 AM |
973 | { |
974 | ++dynsymcount; | |
975 | if (do_sec) | |
976 | elf_section_data (p)->dynindx = dynsymcount; | |
977 | } | |
978 | else if (do_sec) | |
74541ad4 | 979 | elf_section_data (p)->dynindx = 0; |
30b30c21 | 980 | } |
63f452a8 AM |
981 | if (do_sec) |
982 | *section_sym_count = dynsymcount; | |
30b30c21 | 983 | |
6fa3860b PB |
984 | elf_link_hash_traverse (elf_hash_table (info), |
985 | elf_link_renumber_local_hash_table_dynsyms, | |
986 | &dynsymcount); | |
987 | ||
30b30c21 RH |
988 | if (elf_hash_table (info)->dynlocal) |
989 | { | |
990 | struct elf_link_local_dynamic_entry *p; | |
991 | for (p = elf_hash_table (info)->dynlocal; p ; p = p->next) | |
992 | p->dynindx = ++dynsymcount; | |
993 | } | |
90ac2420 | 994 | elf_hash_table (info)->local_dynsymcount = dynsymcount; |
30b30c21 RH |
995 | |
996 | elf_link_hash_traverse (elf_hash_table (info), | |
997 | elf_link_renumber_hash_table_dynsyms, | |
998 | &dynsymcount); | |
999 | ||
d5486c43 L |
1000 | /* There is an unused NULL entry at the head of the table which we |
1001 | must account for in our count even if the table is empty since it | |
1002 | is intended for the mandatory DT_SYMTAB tag (.dynsym section) in | |
1003 | .dynamic section. */ | |
1004 | dynsymcount++; | |
30b30c21 | 1005 | |
ccabcbe5 AM |
1006 | elf_hash_table (info)->dynsymcount = dynsymcount; |
1007 | return dynsymcount; | |
30b30c21 | 1008 | } |
252b5132 | 1009 | |
54ac0771 L |
1010 | /* Merge st_other field. */ |
1011 | ||
1012 | static void | |
1013 | elf_merge_st_other (bfd *abfd, struct elf_link_hash_entry *h, | |
5160d0f3 | 1014 | unsigned int st_other, asection *sec, |
0a1b45a2 | 1015 | bool definition, bool dynamic) |
54ac0771 L |
1016 | { |
1017 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1018 | ||
1019 | /* If st_other has a processor-specific meaning, specific | |
cd3416da | 1020 | code might be needed here. */ |
54ac0771 | 1021 | if (bed->elf_backend_merge_symbol_attribute) |
5160d0f3 | 1022 | (*bed->elf_backend_merge_symbol_attribute) (h, st_other, definition, |
54ac0771 L |
1023 | dynamic); |
1024 | ||
cd3416da | 1025 | if (!dynamic) |
54ac0771 | 1026 | { |
5160d0f3 | 1027 | unsigned symvis = ELF_ST_VISIBILITY (st_other); |
cd3416da | 1028 | unsigned hvis = ELF_ST_VISIBILITY (h->other); |
54ac0771 | 1029 | |
cd3416da AM |
1030 | /* Keep the most constraining visibility. Leave the remainder |
1031 | of the st_other field to elf_backend_merge_symbol_attribute. */ | |
1032 | if (symvis - 1 < hvis - 1) | |
1033 | h->other = symvis | (h->other & ~ELF_ST_VISIBILITY (-1)); | |
54ac0771 | 1034 | } |
b8417128 | 1035 | else if (definition |
5160d0f3 | 1036 | && ELF_ST_VISIBILITY (st_other) != STV_DEFAULT |
b8417128 | 1037 | && (sec->flags & SEC_READONLY) == 0) |
6cabe1ea | 1038 | h->protected_def = 1; |
54ac0771 L |
1039 | } |
1040 | ||
4f3fedcf AM |
1041 | /* This function is called when we want to merge a new symbol with an |
1042 | existing symbol. It handles the various cases which arise when we | |
1043 | find a definition in a dynamic object, or when there is already a | |
1044 | definition in a dynamic object. The new symbol is described by | |
1045 | NAME, SYM, PSEC, and PVALUE. We set SYM_HASH to the hash table | |
1046 | entry. We set POLDBFD to the old symbol's BFD. We set POLD_WEAK | |
1047 | if the old symbol was weak. We set POLD_ALIGNMENT to the alignment | |
1048 | of an old common symbol. We set OVERRIDE if the old symbol is | |
1049 | overriding a new definition. We set TYPE_CHANGE_OK if it is OK for | |
1050 | the type to change. We set SIZE_CHANGE_OK if it is OK for the size | |
1051 | to change. By OK to change, we mean that we shouldn't warn if the | |
1052 | type or size does change. */ | |
45d6a902 | 1053 | |
0a1b45a2 | 1054 | static bool |
268b6b39 AM |
1055 | _bfd_elf_merge_symbol (bfd *abfd, |
1056 | struct bfd_link_info *info, | |
1057 | const char *name, | |
1058 | Elf_Internal_Sym *sym, | |
1059 | asection **psec, | |
1060 | bfd_vma *pvalue, | |
4f3fedcf AM |
1061 | struct elf_link_hash_entry **sym_hash, |
1062 | bfd **poldbfd, | |
0a1b45a2 | 1063 | bool *pold_weak, |
af44c138 | 1064 | unsigned int *pold_alignment, |
0a1b45a2 | 1065 | bool *skip, |
7ba11550 | 1066 | bfd **override, |
0a1b45a2 AM |
1067 | bool *type_change_ok, |
1068 | bool *size_change_ok, | |
1069 | bool *matched) | |
252b5132 | 1070 | { |
7479dfd4 | 1071 | asection *sec, *oldsec; |
45d6a902 | 1072 | struct elf_link_hash_entry *h; |
90c984fc | 1073 | struct elf_link_hash_entry *hi; |
45d6a902 AM |
1074 | struct elf_link_hash_entry *flip; |
1075 | int bind; | |
1076 | bfd *oldbfd; | |
0a1b45a2 AM |
1077 | bool newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon; |
1078 | bool newweak, oldweak, newfunc, oldfunc; | |
a4d8e49b | 1079 | const struct elf_backend_data *bed; |
6e33951e | 1080 | char *new_version; |
0a1b45a2 | 1081 | bool default_sym = *matched; |
45d6a902 | 1082 | |
0a1b45a2 | 1083 | *skip = false; |
7ba11550 | 1084 | *override = NULL; |
45d6a902 AM |
1085 | |
1086 | sec = *psec; | |
1087 | bind = ELF_ST_BIND (sym->st_info); | |
1088 | ||
1089 | if (! bfd_is_und_section (sec)) | |
0a1b45a2 | 1090 | h = elf_link_hash_lookup (elf_hash_table (info), name, true, false, false); |
45d6a902 AM |
1091 | else |
1092 | h = ((struct elf_link_hash_entry *) | |
0a1b45a2 | 1093 | bfd_wrapped_link_hash_lookup (abfd, info, name, true, false, false)); |
45d6a902 | 1094 | if (h == NULL) |
0a1b45a2 | 1095 | return false; |
45d6a902 | 1096 | *sym_hash = h; |
252b5132 | 1097 | |
88ba32a0 L |
1098 | bed = get_elf_backend_data (abfd); |
1099 | ||
6e33951e | 1100 | /* NEW_VERSION is the symbol version of the new symbol. */ |
422f1182 | 1101 | if (h->versioned != unversioned) |
6e33951e | 1102 | { |
422f1182 L |
1103 | /* Symbol version is unknown or versioned. */ |
1104 | new_version = strrchr (name, ELF_VER_CHR); | |
1105 | if (new_version) | |
1106 | { | |
1107 | if (h->versioned == unknown) | |
1108 | { | |
1109 | if (new_version > name && new_version[-1] != ELF_VER_CHR) | |
1110 | h->versioned = versioned_hidden; | |
1111 | else | |
1112 | h->versioned = versioned; | |
1113 | } | |
1114 | new_version += 1; | |
1115 | if (new_version[0] == '\0') | |
1116 | new_version = NULL; | |
1117 | } | |
1118 | else | |
1119 | h->versioned = unversioned; | |
6e33951e | 1120 | } |
422f1182 L |
1121 | else |
1122 | new_version = NULL; | |
6e33951e | 1123 | |
90c984fc L |
1124 | /* For merging, we only care about real symbols. But we need to make |
1125 | sure that indirect symbol dynamic flags are updated. */ | |
1126 | hi = h; | |
45d6a902 AM |
1127 | while (h->root.type == bfd_link_hash_indirect |
1128 | || h->root.type == bfd_link_hash_warning) | |
1129 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1130 | ||
6e33951e L |
1131 | if (!*matched) |
1132 | { | |
1133 | if (hi == h || h->root.type == bfd_link_hash_new) | |
0a1b45a2 | 1134 | *matched = true; |
6e33951e L |
1135 | else |
1136 | { | |
ae7683d2 | 1137 | /* OLD_HIDDEN is true if the existing symbol is only visible |
6e33951e | 1138 | to the symbol with the same symbol version. NEW_HIDDEN is |
ae7683d2 | 1139 | true if the new symbol is only visible to the symbol with |
6e33951e | 1140 | the same symbol version. */ |
0a1b45a2 AM |
1141 | bool old_hidden = h->versioned == versioned_hidden; |
1142 | bool new_hidden = hi->versioned == versioned_hidden; | |
6e33951e L |
1143 | if (!old_hidden && !new_hidden) |
1144 | /* The new symbol matches the existing symbol if both | |
1145 | aren't hidden. */ | |
0a1b45a2 | 1146 | *matched = true; |
6e33951e L |
1147 | else |
1148 | { | |
1149 | /* OLD_VERSION is the symbol version of the existing | |
1150 | symbol. */ | |
422f1182 L |
1151 | char *old_version; |
1152 | ||
1153 | if (h->versioned >= versioned) | |
1154 | old_version = strrchr (h->root.root.string, | |
1155 | ELF_VER_CHR) + 1; | |
1156 | else | |
1157 | old_version = NULL; | |
6e33951e L |
1158 | |
1159 | /* The new symbol matches the existing symbol if they | |
1160 | have the same symbol version. */ | |
1161 | *matched = (old_version == new_version | |
1162 | || (old_version != NULL | |
1163 | && new_version != NULL | |
1164 | && strcmp (old_version, new_version) == 0)); | |
1165 | } | |
1166 | } | |
1167 | } | |
1168 | ||
934bce08 AM |
1169 | /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the |
1170 | existing symbol. */ | |
1171 | ||
1172 | oldbfd = NULL; | |
1173 | oldsec = NULL; | |
1174 | switch (h->root.type) | |
1175 | { | |
1176 | default: | |
1177 | break; | |
1178 | ||
1179 | case bfd_link_hash_undefined: | |
1180 | case bfd_link_hash_undefweak: | |
1181 | oldbfd = h->root.u.undef.abfd; | |
1182 | break; | |
1183 | ||
1184 | case bfd_link_hash_defined: | |
1185 | case bfd_link_hash_defweak: | |
1186 | oldbfd = h->root.u.def.section->owner; | |
1187 | oldsec = h->root.u.def.section; | |
1188 | break; | |
1189 | ||
1190 | case bfd_link_hash_common: | |
1191 | oldbfd = h->root.u.c.p->section->owner; | |
1192 | oldsec = h->root.u.c.p->section; | |
1193 | if (pold_alignment) | |
1194 | *pold_alignment = h->root.u.c.p->alignment_power; | |
1195 | break; | |
1196 | } | |
1197 | if (poldbfd && *poldbfd == NULL) | |
1198 | *poldbfd = oldbfd; | |
1199 | ||
1200 | /* Differentiate strong and weak symbols. */ | |
1201 | newweak = bind == STB_WEAK; | |
1202 | oldweak = (h->root.type == bfd_link_hash_defweak | |
1203 | || h->root.type == bfd_link_hash_undefweak); | |
1204 | if (pold_weak) | |
1205 | *pold_weak = oldweak; | |
1206 | ||
40b36307 | 1207 | /* We have to check it for every instance since the first few may be |
ee659f1f | 1208 | references and not all compilers emit symbol type for undefined |
40b36307 L |
1209 | symbols. */ |
1210 | bfd_elf_link_mark_dynamic_symbol (info, h, sym); | |
1211 | ||
ee659f1f AM |
1212 | /* NEWDYN and OLDDYN indicate whether the new or old symbol, |
1213 | respectively, is from a dynamic object. */ | |
1214 | ||
1215 | newdyn = (abfd->flags & DYNAMIC) != 0; | |
1216 | ||
1217 | /* ref_dynamic_nonweak and dynamic_def flags track actual undefined | |
1218 | syms and defined syms in dynamic libraries respectively. | |
1219 | ref_dynamic on the other hand can be set for a symbol defined in | |
1220 | a dynamic library, and def_dynamic may not be set; When the | |
1221 | definition in a dynamic lib is overridden by a definition in the | |
1222 | executable use of the symbol in the dynamic lib becomes a | |
1223 | reference to the executable symbol. */ | |
1224 | if (newdyn) | |
1225 | { | |
1226 | if (bfd_is_und_section (sec)) | |
1227 | { | |
1228 | if (bind != STB_WEAK) | |
1229 | { | |
1230 | h->ref_dynamic_nonweak = 1; | |
1231 | hi->ref_dynamic_nonweak = 1; | |
1232 | } | |
1233 | } | |
1234 | else | |
1235 | { | |
6e33951e L |
1236 | /* Update the existing symbol only if they match. */ |
1237 | if (*matched) | |
1238 | h->dynamic_def = 1; | |
ee659f1f AM |
1239 | hi->dynamic_def = 1; |
1240 | } | |
1241 | } | |
1242 | ||
45d6a902 AM |
1243 | /* If we just created the symbol, mark it as being an ELF symbol. |
1244 | Other than that, there is nothing to do--there is no merge issue | |
1245 | with a newly defined symbol--so we just return. */ | |
1246 | ||
1247 | if (h->root.type == bfd_link_hash_new) | |
252b5132 | 1248 | { |
f5385ebf | 1249 | h->non_elf = 0; |
0a1b45a2 | 1250 | return true; |
45d6a902 | 1251 | } |
252b5132 | 1252 | |
45d6a902 AM |
1253 | /* In cases involving weak versioned symbols, we may wind up trying |
1254 | to merge a symbol with itself. Catch that here, to avoid the | |
1255 | confusion that results if we try to override a symbol with | |
1256 | itself. The additional tests catch cases like | |
1257 | _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a | |
1258 | dynamic object, which we do want to handle here. */ | |
1259 | if (abfd == oldbfd | |
895fa45f | 1260 | && (newweak || oldweak) |
45d6a902 | 1261 | && ((abfd->flags & DYNAMIC) == 0 |
f5385ebf | 1262 | || !h->def_regular)) |
0a1b45a2 | 1263 | return true; |
45d6a902 | 1264 | |
0a1b45a2 | 1265 | olddyn = false; |
45d6a902 AM |
1266 | if (oldbfd != NULL) |
1267 | olddyn = (oldbfd->flags & DYNAMIC) != 0; | |
707bba77 | 1268 | else if (oldsec != NULL) |
45d6a902 | 1269 | { |
707bba77 | 1270 | /* This handles the special SHN_MIPS_{TEXT,DATA} section |
45d6a902 | 1271 | indices used by MIPS ELF. */ |
707bba77 | 1272 | olddyn = (oldsec->symbol->flags & BSF_DYNAMIC) != 0; |
45d6a902 | 1273 | } |
252b5132 | 1274 | |
1a3b5c34 AM |
1275 | /* Handle a case where plugin_notice won't be called and thus won't |
1276 | set the non_ir_ref flags on the first pass over symbols. */ | |
1277 | if (oldbfd != NULL | |
1278 | && (oldbfd->flags & BFD_PLUGIN) != (abfd->flags & BFD_PLUGIN) | |
1279 | && newdyn != olddyn) | |
1280 | { | |
0a1b45a2 AM |
1281 | h->root.non_ir_ref_dynamic = true; |
1282 | hi->root.non_ir_ref_dynamic = true; | |
1a3b5c34 AM |
1283 | } |
1284 | ||
45d6a902 AM |
1285 | /* NEWDEF and OLDDEF indicate whether the new or old symbol, |
1286 | respectively, appear to be a definition rather than reference. */ | |
1287 | ||
707bba77 | 1288 | newdef = !bfd_is_und_section (sec) && !bfd_is_com_section (sec); |
45d6a902 | 1289 | |
707bba77 AM |
1290 | olddef = (h->root.type != bfd_link_hash_undefined |
1291 | && h->root.type != bfd_link_hash_undefweak | |
202ac193 | 1292 | && h->root.type != bfd_link_hash_common); |
45d6a902 | 1293 | |
0a36a439 L |
1294 | /* NEWFUNC and OLDFUNC indicate whether the new or old symbol, |
1295 | respectively, appear to be a function. */ | |
1296 | ||
1297 | newfunc = (ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1298 | && bed->is_function_type (ELF_ST_TYPE (sym->st_info))); | |
1299 | ||
1300 | oldfunc = (h->type != STT_NOTYPE | |
1301 | && bed->is_function_type (h->type)); | |
1302 | ||
c5d37467 | 1303 | if (!(newfunc && oldfunc) |
5b677558 AM |
1304 | && ELF_ST_TYPE (sym->st_info) != h->type |
1305 | && ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1306 | && h->type != STT_NOTYPE | |
c5d37467 AM |
1307 | && (newdef || bfd_is_com_section (sec)) |
1308 | && (olddef || h->root.type == bfd_link_hash_common)) | |
580a2b6e | 1309 | { |
c5d37467 AM |
1310 | /* If creating a default indirect symbol ("foo" or "foo@") from |
1311 | a dynamic versioned definition ("foo@@") skip doing so if | |
1312 | there is an existing regular definition with a different | |
1313 | type. We don't want, for example, a "time" variable in the | |
1314 | executable overriding a "time" function in a shared library. */ | |
1315 | if (newdyn | |
1316 | && !olddyn) | |
1317 | { | |
0a1b45a2 AM |
1318 | *skip = true; |
1319 | return true; | |
c5d37467 AM |
1320 | } |
1321 | ||
1322 | /* When adding a symbol from a regular object file after we have | |
1323 | created indirect symbols, undo the indirection and any | |
1324 | dynamic state. */ | |
1325 | if (hi != h | |
1326 | && !newdyn | |
1327 | && olddyn) | |
1328 | { | |
1329 | h = hi; | |
0a1b45a2 | 1330 | (*bed->elf_backend_hide_symbol) (info, h, true); |
c5d37467 AM |
1331 | h->forced_local = 0; |
1332 | h->ref_dynamic = 0; | |
1333 | h->def_dynamic = 0; | |
1334 | h->dynamic_def = 0; | |
1335 | if (h->root.u.undef.next || info->hash->undefs_tail == &h->root) | |
1336 | { | |
1337 | h->root.type = bfd_link_hash_undefined; | |
1338 | h->root.u.undef.abfd = abfd; | |
1339 | } | |
1340 | else | |
1341 | { | |
1342 | h->root.type = bfd_link_hash_new; | |
1343 | h->root.u.undef.abfd = NULL; | |
1344 | } | |
0a1b45a2 | 1345 | return true; |
c5d37467 | 1346 | } |
580a2b6e L |
1347 | } |
1348 | ||
4c34aff8 AM |
1349 | /* Check TLS symbols. We don't check undefined symbols introduced |
1350 | by "ld -u" which have no type (and oldbfd NULL), and we don't | |
1351 | check symbols from plugins because they also have no type. */ | |
1352 | if (oldbfd != NULL | |
1353 | && (oldbfd->flags & BFD_PLUGIN) == 0 | |
1354 | && (abfd->flags & BFD_PLUGIN) == 0 | |
1355 | && ELF_ST_TYPE (sym->st_info) != h->type | |
1356 | && (ELF_ST_TYPE (sym->st_info) == STT_TLS || h->type == STT_TLS)) | |
7479dfd4 L |
1357 | { |
1358 | bfd *ntbfd, *tbfd; | |
0a1b45a2 | 1359 | bool ntdef, tdef; |
7479dfd4 L |
1360 | asection *ntsec, *tsec; |
1361 | ||
1362 | if (h->type == STT_TLS) | |
1363 | { | |
3b36f7e6 | 1364 | ntbfd = abfd; |
7479dfd4 L |
1365 | ntsec = sec; |
1366 | ntdef = newdef; | |
1367 | tbfd = oldbfd; | |
1368 | tsec = oldsec; | |
1369 | tdef = olddef; | |
1370 | } | |
1371 | else | |
1372 | { | |
1373 | ntbfd = oldbfd; | |
1374 | ntsec = oldsec; | |
1375 | ntdef = olddef; | |
1376 | tbfd = abfd; | |
1377 | tsec = sec; | |
1378 | tdef = newdef; | |
1379 | } | |
1380 | ||
1381 | if (tdef && ntdef) | |
4eca0228 | 1382 | _bfd_error_handler |
695344c0 | 1383 | /* xgettext:c-format */ |
871b3ab2 AM |
1384 | (_("%s: TLS definition in %pB section %pA " |
1385 | "mismatches non-TLS definition in %pB section %pA"), | |
c08bb8dd | 1386 | h->root.root.string, tbfd, tsec, ntbfd, ntsec); |
7479dfd4 | 1387 | else if (!tdef && !ntdef) |
4eca0228 | 1388 | _bfd_error_handler |
695344c0 | 1389 | /* xgettext:c-format */ |
871b3ab2 AM |
1390 | (_("%s: TLS reference in %pB " |
1391 | "mismatches non-TLS reference in %pB"), | |
c08bb8dd | 1392 | h->root.root.string, tbfd, ntbfd); |
7479dfd4 | 1393 | else if (tdef) |
4eca0228 | 1394 | _bfd_error_handler |
695344c0 | 1395 | /* xgettext:c-format */ |
871b3ab2 AM |
1396 | (_("%s: TLS definition in %pB section %pA " |
1397 | "mismatches non-TLS reference in %pB"), | |
c08bb8dd | 1398 | h->root.root.string, tbfd, tsec, ntbfd); |
7479dfd4 | 1399 | else |
4eca0228 | 1400 | _bfd_error_handler |
695344c0 | 1401 | /* xgettext:c-format */ |
871b3ab2 AM |
1402 | (_("%s: TLS reference in %pB " |
1403 | "mismatches non-TLS definition in %pB section %pA"), | |
c08bb8dd | 1404 | h->root.root.string, tbfd, ntbfd, ntsec); |
7479dfd4 L |
1405 | |
1406 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 1407 | return false; |
7479dfd4 L |
1408 | } |
1409 | ||
45d6a902 AM |
1410 | /* If the old symbol has non-default visibility, we ignore the new |
1411 | definition from a dynamic object. */ | |
1412 | if (newdyn | |
9c7a29a3 | 1413 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
45d6a902 AM |
1414 | && !bfd_is_und_section (sec)) |
1415 | { | |
0a1b45a2 | 1416 | *skip = true; |
45d6a902 | 1417 | /* Make sure this symbol is dynamic. */ |
f5385ebf | 1418 | h->ref_dynamic = 1; |
90c984fc | 1419 | hi->ref_dynamic = 1; |
45d6a902 AM |
1420 | /* A protected symbol has external availability. Make sure it is |
1421 | recorded as dynamic. | |
1422 | ||
1423 | FIXME: Should we check type and size for protected symbol? */ | |
1424 | if (ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
c152c796 | 1425 | return bfd_elf_link_record_dynamic_symbol (info, h); |
45d6a902 | 1426 | else |
0a1b45a2 | 1427 | return true; |
45d6a902 AM |
1428 | } |
1429 | else if (!newdyn | |
9c7a29a3 | 1430 | && ELF_ST_VISIBILITY (sym->st_other) != STV_DEFAULT |
f5385ebf | 1431 | && h->def_dynamic) |
45d6a902 AM |
1432 | { |
1433 | /* If the new symbol with non-default visibility comes from a | |
1434 | relocatable file and the old definition comes from a dynamic | |
1435 | object, we remove the old definition. */ | |
6c9b78e6 | 1436 | if (hi->root.type == bfd_link_hash_indirect) |
d2dee3b2 L |
1437 | { |
1438 | /* Handle the case where the old dynamic definition is | |
1439 | default versioned. We need to copy the symbol info from | |
1440 | the symbol with default version to the normal one if it | |
1441 | was referenced before. */ | |
1442 | if (h->ref_regular) | |
1443 | { | |
6c9b78e6 | 1444 | hi->root.type = h->root.type; |
d2dee3b2 | 1445 | h->root.type = bfd_link_hash_indirect; |
6c9b78e6 | 1446 | (*bed->elf_backend_copy_indirect_symbol) (info, hi, h); |
aed81c4e | 1447 | |
6c9b78e6 | 1448 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; |
aed81c4e | 1449 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
d2dee3b2 | 1450 | { |
aed81c4e MR |
1451 | /* If the new symbol is hidden or internal, completely undo |
1452 | any dynamic link state. */ | |
0a1b45a2 | 1453 | (*bed->elf_backend_hide_symbol) (info, h, true); |
aed81c4e MR |
1454 | h->forced_local = 0; |
1455 | h->ref_dynamic = 0; | |
d2dee3b2 L |
1456 | } |
1457 | else | |
aed81c4e MR |
1458 | h->ref_dynamic = 1; |
1459 | ||
1460 | h->def_dynamic = 0; | |
aed81c4e MR |
1461 | /* FIXME: Should we check type and size for protected symbol? */ |
1462 | h->size = 0; | |
1463 | h->type = 0; | |
1464 | ||
6c9b78e6 | 1465 | h = hi; |
d2dee3b2 L |
1466 | } |
1467 | else | |
6c9b78e6 | 1468 | h = hi; |
d2dee3b2 | 1469 | } |
1de1a317 | 1470 | |
f5eda473 AM |
1471 | /* If the old symbol was undefined before, then it will still be |
1472 | on the undefs list. If the new symbol is undefined or | |
1473 | common, we can't make it bfd_link_hash_new here, because new | |
1474 | undefined or common symbols will be added to the undefs list | |
1475 | by _bfd_generic_link_add_one_symbol. Symbols may not be | |
1476 | added twice to the undefs list. Also, if the new symbol is | |
1477 | undefweak then we don't want to lose the strong undef. */ | |
1478 | if (h->root.u.undef.next || info->hash->undefs_tail == &h->root) | |
1de1a317 | 1479 | { |
1de1a317 | 1480 | h->root.type = bfd_link_hash_undefined; |
1de1a317 L |
1481 | h->root.u.undef.abfd = abfd; |
1482 | } | |
1483 | else | |
1484 | { | |
1485 | h->root.type = bfd_link_hash_new; | |
1486 | h->root.u.undef.abfd = NULL; | |
1487 | } | |
1488 | ||
f5eda473 | 1489 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
252b5132 | 1490 | { |
f5eda473 AM |
1491 | /* If the new symbol is hidden or internal, completely undo |
1492 | any dynamic link state. */ | |
0a1b45a2 | 1493 | (*bed->elf_backend_hide_symbol) (info, h, true); |
f5eda473 AM |
1494 | h->forced_local = 0; |
1495 | h->ref_dynamic = 0; | |
45d6a902 | 1496 | } |
f5eda473 AM |
1497 | else |
1498 | h->ref_dynamic = 1; | |
1499 | h->def_dynamic = 0; | |
45d6a902 AM |
1500 | /* FIXME: Should we check type and size for protected symbol? */ |
1501 | h->size = 0; | |
1502 | h->type = 0; | |
0a1b45a2 | 1503 | return true; |
45d6a902 | 1504 | } |
14a793b2 | 1505 | |
15b43f48 AM |
1506 | /* If a new weak symbol definition comes from a regular file and the |
1507 | old symbol comes from a dynamic library, we treat the new one as | |
1508 | strong. Similarly, an old weak symbol definition from a regular | |
1509 | file is treated as strong when the new symbol comes from a dynamic | |
1510 | library. Further, an old weak symbol from a dynamic library is | |
1511 | treated as strong if the new symbol is from a dynamic library. | |
1512 | This reflects the way glibc's ld.so works. | |
1513 | ||
165f707a AM |
1514 | Also allow a weak symbol to override a linker script symbol |
1515 | defined by an early pass over the script. This is done so the | |
1516 | linker knows the symbol is defined in an object file, for the | |
1517 | DEFINED script function. | |
1518 | ||
15b43f48 AM |
1519 | Do this before setting *type_change_ok or *size_change_ok so that |
1520 | we warn properly when dynamic library symbols are overridden. */ | |
1521 | ||
165f707a | 1522 | if (newdef && !newdyn && (olddyn || h->root.ldscript_def)) |
0a1b45a2 | 1523 | newweak = false; |
15b43f48 | 1524 | if (olddef && newdyn) |
0a1b45a2 | 1525 | oldweak = false; |
0f8a2703 | 1526 | |
d334575b | 1527 | /* Allow changes between different types of function symbol. */ |
0a36a439 | 1528 | if (newfunc && oldfunc) |
0a1b45a2 | 1529 | *type_change_ok = true; |
fcb93ecf | 1530 | |
79349b09 AM |
1531 | /* It's OK to change the type if either the existing symbol or the |
1532 | new symbol is weak. A type change is also OK if the old symbol | |
1533 | is undefined and the new symbol is defined. */ | |
252b5132 | 1534 | |
79349b09 AM |
1535 | if (oldweak |
1536 | || newweak | |
1537 | || (newdef | |
1538 | && h->root.type == bfd_link_hash_undefined)) | |
0a1b45a2 | 1539 | *type_change_ok = true; |
79349b09 AM |
1540 | |
1541 | /* It's OK to change the size if either the existing symbol or the | |
1542 | new symbol is weak, or if the old symbol is undefined. */ | |
1543 | ||
1544 | if (*type_change_ok | |
1545 | || h->root.type == bfd_link_hash_undefined) | |
0a1b45a2 | 1546 | *size_change_ok = true; |
45d6a902 | 1547 | |
45d6a902 AM |
1548 | /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old |
1549 | symbol, respectively, appears to be a common symbol in a dynamic | |
1550 | object. If a symbol appears in an uninitialized section, and is | |
1551 | not weak, and is not a function, then it may be a common symbol | |
1552 | which was resolved when the dynamic object was created. We want | |
1553 | to treat such symbols specially, because they raise special | |
1554 | considerations when setting the symbol size: if the symbol | |
1555 | appears as a common symbol in a regular object, and the size in | |
1556 | the regular object is larger, we must make sure that we use the | |
1557 | larger size. This problematic case can always be avoided in C, | |
1558 | but it must be handled correctly when using Fortran shared | |
1559 | libraries. | |
1560 | ||
1561 | Note that if NEWDYNCOMMON is set, NEWDEF will be set, and | |
1562 | likewise for OLDDYNCOMMON and OLDDEF. | |
1563 | ||
1564 | Note that this test is just a heuristic, and that it is quite | |
1565 | possible to have an uninitialized symbol in a shared object which | |
1566 | is really a definition, rather than a common symbol. This could | |
1567 | lead to some minor confusion when the symbol really is a common | |
1568 | symbol in some regular object. However, I think it will be | |
1569 | harmless. */ | |
1570 | ||
1571 | if (newdyn | |
1572 | && newdef | |
79349b09 | 1573 | && !newweak |
45d6a902 AM |
1574 | && (sec->flags & SEC_ALLOC) != 0 |
1575 | && (sec->flags & SEC_LOAD) == 0 | |
1576 | && sym->st_size > 0 | |
0a36a439 | 1577 | && !newfunc) |
0a1b45a2 | 1578 | newdyncommon = true; |
45d6a902 | 1579 | else |
0a1b45a2 | 1580 | newdyncommon = false; |
45d6a902 AM |
1581 | |
1582 | if (olddyn | |
1583 | && olddef | |
1584 | && h->root.type == bfd_link_hash_defined | |
f5385ebf | 1585 | && h->def_dynamic |
45d6a902 AM |
1586 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 |
1587 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
1588 | && h->size > 0 | |
0a36a439 | 1589 | && !oldfunc) |
0a1b45a2 | 1590 | olddyncommon = true; |
45d6a902 | 1591 | else |
0a1b45a2 | 1592 | olddyncommon = false; |
45d6a902 | 1593 | |
a4d8e49b L |
1594 | /* We now know everything about the old and new symbols. We ask the |
1595 | backend to check if we can merge them. */ | |
5d13b3b3 AM |
1596 | if (bed->merge_symbol != NULL) |
1597 | { | |
1598 | if (!bed->merge_symbol (h, sym, psec, newdef, olddef, oldbfd, oldsec)) | |
0a1b45a2 | 1599 | return false; |
5d13b3b3 AM |
1600 | sec = *psec; |
1601 | } | |
a4d8e49b | 1602 | |
a83ef4d1 L |
1603 | /* There are multiple definitions of a normal symbol. Skip the |
1604 | default symbol as well as definition from an IR object. */ | |
93f4de39 | 1605 | if (olddef && !olddyn && !oldweak && newdef && !newdyn && !newweak |
a83ef4d1 L |
1606 | && !default_sym && h->def_regular |
1607 | && !(oldbfd != NULL | |
1608 | && (oldbfd->flags & BFD_PLUGIN) != 0 | |
1609 | && (abfd->flags & BFD_PLUGIN) == 0)) | |
93f4de39 RL |
1610 | { |
1611 | /* Handle a multiple definition. */ | |
1612 | (*info->callbacks->multiple_definition) (info, &h->root, | |
1613 | abfd, sec, *pvalue); | |
0a1b45a2 AM |
1614 | *skip = true; |
1615 | return true; | |
93f4de39 RL |
1616 | } |
1617 | ||
45d6a902 AM |
1618 | /* If both the old and the new symbols look like common symbols in a |
1619 | dynamic object, set the size of the symbol to the larger of the | |
1620 | two. */ | |
1621 | ||
1622 | if (olddyncommon | |
1623 | && newdyncommon | |
1624 | && sym->st_size != h->size) | |
1625 | { | |
1626 | /* Since we think we have two common symbols, issue a multiple | |
1627 | common warning if desired. Note that we only warn if the | |
1628 | size is different. If the size is the same, we simply let | |
1629 | the old symbol override the new one as normally happens with | |
1630 | symbols defined in dynamic objects. */ | |
1631 | ||
1a72702b AM |
1632 | (*info->callbacks->multiple_common) (info, &h->root, abfd, |
1633 | bfd_link_hash_common, sym->st_size); | |
45d6a902 AM |
1634 | if (sym->st_size > h->size) |
1635 | h->size = sym->st_size; | |
252b5132 | 1636 | |
0a1b45a2 | 1637 | *size_change_ok = true; |
252b5132 RH |
1638 | } |
1639 | ||
45d6a902 AM |
1640 | /* If we are looking at a dynamic object, and we have found a |
1641 | definition, we need to see if the symbol was already defined by | |
1642 | some other object. If so, we want to use the existing | |
1643 | definition, and we do not want to report a multiple symbol | |
1644 | definition error; we do this by clobbering *PSEC to be | |
1645 | bfd_und_section_ptr. | |
1646 | ||
1647 | We treat a common symbol as a definition if the symbol in the | |
1648 | shared library is a function, since common symbols always | |
1649 | represent variables; this can cause confusion in principle, but | |
1650 | any such confusion would seem to indicate an erroneous program or | |
1651 | shared library. We also permit a common symbol in a regular | |
8170f769 | 1652 | object to override a weak symbol in a shared object. */ |
45d6a902 AM |
1653 | |
1654 | if (newdyn | |
1655 | && newdef | |
77cfaee6 | 1656 | && (olddef |
45d6a902 | 1657 | || (h->root.type == bfd_link_hash_common |
8170f769 | 1658 | && (newweak || newfunc)))) |
45d6a902 | 1659 | { |
7ba11550 | 1660 | *override = abfd; |
0a1b45a2 AM |
1661 | newdef = false; |
1662 | newdyncommon = false; | |
252b5132 | 1663 | |
45d6a902 | 1664 | *psec = sec = bfd_und_section_ptr; |
0a1b45a2 | 1665 | *size_change_ok = true; |
252b5132 | 1666 | |
45d6a902 AM |
1667 | /* If we get here when the old symbol is a common symbol, then |
1668 | we are explicitly letting it override a weak symbol or | |
1669 | function in a dynamic object, and we don't want to warn about | |
1670 | a type change. If the old symbol is a defined symbol, a type | |
1671 | change warning may still be appropriate. */ | |
252b5132 | 1672 | |
45d6a902 | 1673 | if (h->root.type == bfd_link_hash_common) |
0a1b45a2 | 1674 | *type_change_ok = true; |
45d6a902 AM |
1675 | } |
1676 | ||
1677 | /* Handle the special case of an old common symbol merging with a | |
1678 | new symbol which looks like a common symbol in a shared object. | |
1679 | We change *PSEC and *PVALUE to make the new symbol look like a | |
91134c82 L |
1680 | common symbol, and let _bfd_generic_link_add_one_symbol do the |
1681 | right thing. */ | |
45d6a902 AM |
1682 | |
1683 | if (newdyncommon | |
1684 | && h->root.type == bfd_link_hash_common) | |
1685 | { | |
7ba11550 | 1686 | *override = oldbfd; |
0a1b45a2 AM |
1687 | newdef = false; |
1688 | newdyncommon = false; | |
45d6a902 | 1689 | *pvalue = sym->st_size; |
a4d8e49b | 1690 | *psec = sec = bed->common_section (oldsec); |
0a1b45a2 | 1691 | *size_change_ok = true; |
45d6a902 AM |
1692 | } |
1693 | ||
c5e2cead | 1694 | /* Skip weak definitions of symbols that are already defined. */ |
f41d945b | 1695 | if (newdef && olddef && newweak) |
54ac0771 | 1696 | { |
35ed3f94 | 1697 | /* Don't skip new non-IR weak syms. */ |
3a5dbfb2 AM |
1698 | if (!(oldbfd != NULL |
1699 | && (oldbfd->flags & BFD_PLUGIN) != 0 | |
35ed3f94 | 1700 | && (abfd->flags & BFD_PLUGIN) == 0)) |
57fa7b8c | 1701 | { |
0a1b45a2 AM |
1702 | newdef = false; |
1703 | *skip = true; | |
57fa7b8c | 1704 | } |
54ac0771 L |
1705 | |
1706 | /* Merge st_other. If the symbol already has a dynamic index, | |
1707 | but visibility says it should not be visible, turn it into a | |
1708 | local symbol. */ | |
5160d0f3 | 1709 | elf_merge_st_other (abfd, h, sym->st_other, sec, newdef, newdyn); |
54ac0771 L |
1710 | if (h->dynindx != -1) |
1711 | switch (ELF_ST_VISIBILITY (h->other)) | |
1712 | { | |
1713 | case STV_INTERNAL: | |
1714 | case STV_HIDDEN: | |
0a1b45a2 | 1715 | (*bed->elf_backend_hide_symbol) (info, h, true); |
54ac0771 L |
1716 | break; |
1717 | } | |
1718 | } | |
c5e2cead | 1719 | |
45d6a902 AM |
1720 | /* If the old symbol is from a dynamic object, and the new symbol is |
1721 | a definition which is not from a dynamic object, then the new | |
1722 | symbol overrides the old symbol. Symbols from regular files | |
1723 | always take precedence over symbols from dynamic objects, even if | |
1724 | they are defined after the dynamic object in the link. | |
1725 | ||
1726 | As above, we again permit a common symbol in a regular object to | |
1727 | override a definition in a shared object if the shared object | |
0f8a2703 | 1728 | symbol is a function or is weak. */ |
45d6a902 AM |
1729 | |
1730 | flip = NULL; | |
77cfaee6 | 1731 | if (!newdyn |
45d6a902 AM |
1732 | && (newdef |
1733 | || (bfd_is_com_section (sec) | |
0a36a439 | 1734 | && (oldweak || oldfunc))) |
45d6a902 AM |
1735 | && olddyn |
1736 | && olddef | |
f5385ebf | 1737 | && h->def_dynamic) |
45d6a902 AM |
1738 | { |
1739 | /* Change the hash table entry to undefined, and let | |
1740 | _bfd_generic_link_add_one_symbol do the right thing with the | |
1741 | new definition. */ | |
1742 | ||
1743 | h->root.type = bfd_link_hash_undefined; | |
1744 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
0a1b45a2 | 1745 | *size_change_ok = true; |
45d6a902 | 1746 | |
0a1b45a2 AM |
1747 | olddef = false; |
1748 | olddyncommon = false; | |
45d6a902 AM |
1749 | |
1750 | /* We again permit a type change when a common symbol may be | |
1751 | overriding a function. */ | |
1752 | ||
1753 | if (bfd_is_com_section (sec)) | |
0a36a439 L |
1754 | { |
1755 | if (oldfunc) | |
1756 | { | |
1757 | /* If a common symbol overrides a function, make sure | |
1758 | that it isn't defined dynamically nor has type | |
1759 | function. */ | |
1760 | h->def_dynamic = 0; | |
1761 | h->type = STT_NOTYPE; | |
1762 | } | |
0a1b45a2 | 1763 | *type_change_ok = true; |
0a36a439 | 1764 | } |
45d6a902 | 1765 | |
6c9b78e6 AM |
1766 | if (hi->root.type == bfd_link_hash_indirect) |
1767 | flip = hi; | |
45d6a902 AM |
1768 | else |
1769 | /* This union may have been set to be non-NULL when this symbol | |
1770 | was seen in a dynamic object. We must force the union to be | |
1771 | NULL, so that it is correct for a regular symbol. */ | |
1772 | h->verinfo.vertree = NULL; | |
1773 | } | |
1774 | ||
1775 | /* Handle the special case of a new common symbol merging with an | |
1776 | old symbol that looks like it might be a common symbol defined in | |
1777 | a shared object. Note that we have already handled the case in | |
1778 | which a new common symbol should simply override the definition | |
1779 | in the shared library. */ | |
1780 | ||
1781 | if (! newdyn | |
1782 | && bfd_is_com_section (sec) | |
1783 | && olddyncommon) | |
1784 | { | |
1785 | /* It would be best if we could set the hash table entry to a | |
1786 | common symbol, but we don't know what to use for the section | |
1787 | or the alignment. */ | |
1a72702b AM |
1788 | (*info->callbacks->multiple_common) (info, &h->root, abfd, |
1789 | bfd_link_hash_common, sym->st_size); | |
45d6a902 | 1790 | |
4cc11e76 | 1791 | /* If the presumed common symbol in the dynamic object is |
45d6a902 AM |
1792 | larger, pretend that the new symbol has its size. */ |
1793 | ||
1794 | if (h->size > *pvalue) | |
1795 | *pvalue = h->size; | |
1796 | ||
af44c138 L |
1797 | /* We need to remember the alignment required by the symbol |
1798 | in the dynamic object. */ | |
1799 | BFD_ASSERT (pold_alignment); | |
1800 | *pold_alignment = h->root.u.def.section->alignment_power; | |
45d6a902 | 1801 | |
0a1b45a2 AM |
1802 | olddef = false; |
1803 | olddyncommon = false; | |
45d6a902 AM |
1804 | |
1805 | h->root.type = bfd_link_hash_undefined; | |
1806 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1807 | ||
0a1b45a2 AM |
1808 | *size_change_ok = true; |
1809 | *type_change_ok = true; | |
45d6a902 | 1810 | |
6c9b78e6 AM |
1811 | if (hi->root.type == bfd_link_hash_indirect) |
1812 | flip = hi; | |
45d6a902 AM |
1813 | else |
1814 | h->verinfo.vertree = NULL; | |
1815 | } | |
1816 | ||
1817 | if (flip != NULL) | |
1818 | { | |
1819 | /* Handle the case where we had a versioned symbol in a dynamic | |
1820 | library and now find a definition in a normal object. In this | |
1821 | case, we make the versioned symbol point to the normal one. */ | |
45d6a902 | 1822 | flip->root.type = h->root.type; |
00cbee0a | 1823 | flip->root.u.undef.abfd = h->root.u.undef.abfd; |
45d6a902 AM |
1824 | h->root.type = bfd_link_hash_indirect; |
1825 | h->root.u.i.link = (struct bfd_link_hash_entry *) flip; | |
fcfa13d2 | 1826 | (*bed->elf_backend_copy_indirect_symbol) (info, flip, h); |
f5385ebf | 1827 | if (h->def_dynamic) |
45d6a902 | 1828 | { |
f5385ebf AM |
1829 | h->def_dynamic = 0; |
1830 | flip->ref_dynamic = 1; | |
45d6a902 AM |
1831 | } |
1832 | } | |
1833 | ||
0a1b45a2 | 1834 | return true; |
45d6a902 AM |
1835 | } |
1836 | ||
1837 | /* This function is called to create an indirect symbol from the | |
1838 | default for the symbol with the default version if needed. The | |
4f3fedcf | 1839 | symbol is described by H, NAME, SYM, SEC, and VALUE. We |
0f8a2703 | 1840 | set DYNSYM if the new indirect symbol is dynamic. */ |
45d6a902 | 1841 | |
0a1b45a2 | 1842 | static bool |
268b6b39 AM |
1843 | _bfd_elf_add_default_symbol (bfd *abfd, |
1844 | struct bfd_link_info *info, | |
1845 | struct elf_link_hash_entry *h, | |
1846 | const char *name, | |
1847 | Elf_Internal_Sym *sym, | |
4f3fedcf AM |
1848 | asection *sec, |
1849 | bfd_vma value, | |
1850 | bfd **poldbfd, | |
0a1b45a2 | 1851 | bool *dynsym) |
45d6a902 | 1852 | { |
0a1b45a2 AM |
1853 | bool type_change_ok; |
1854 | bool size_change_ok; | |
1855 | bool skip; | |
45d6a902 AM |
1856 | char *shortname; |
1857 | struct elf_link_hash_entry *hi; | |
1858 | struct bfd_link_hash_entry *bh; | |
9c5bfbb7 | 1859 | const struct elf_backend_data *bed; |
0a1b45a2 AM |
1860 | bool collect; |
1861 | bool dynamic; | |
f01fb44c | 1862 | bfd *override; |
45d6a902 AM |
1863 | char *p; |
1864 | size_t len, shortlen; | |
ffd65175 | 1865 | asection *tmp_sec; |
0a1b45a2 | 1866 | bool matched; |
45d6a902 | 1867 | |
422f1182 | 1868 | if (h->versioned == unversioned || h->versioned == versioned_hidden) |
0a1b45a2 | 1869 | return true; |
422f1182 | 1870 | |
45d6a902 AM |
1871 | /* If this symbol has a version, and it is the default version, we |
1872 | create an indirect symbol from the default name to the fully | |
1873 | decorated name. This will cause external references which do not | |
1874 | specify a version to be bound to this version of the symbol. */ | |
1875 | p = strchr (name, ELF_VER_CHR); | |
422f1182 L |
1876 | if (h->versioned == unknown) |
1877 | { | |
1878 | if (p == NULL) | |
1879 | { | |
1880 | h->versioned = unversioned; | |
0a1b45a2 | 1881 | return true; |
422f1182 L |
1882 | } |
1883 | else | |
1884 | { | |
1885 | if (p[1] != ELF_VER_CHR) | |
1886 | { | |
1887 | h->versioned = versioned_hidden; | |
0a1b45a2 | 1888 | return true; |
422f1182 L |
1889 | } |
1890 | else | |
1891 | h->versioned = versioned; | |
1892 | } | |
1893 | } | |
4373f8af L |
1894 | else |
1895 | { | |
1896 | /* PR ld/19073: We may see an unversioned definition after the | |
1897 | default version. */ | |
1898 | if (p == NULL) | |
0a1b45a2 | 1899 | return true; |
4373f8af | 1900 | } |
45d6a902 | 1901 | |
45d6a902 AM |
1902 | bed = get_elf_backend_data (abfd); |
1903 | collect = bed->collect; | |
1904 | dynamic = (abfd->flags & DYNAMIC) != 0; | |
1905 | ||
1906 | shortlen = p - name; | |
a50b1753 | 1907 | shortname = (char *) bfd_hash_allocate (&info->hash->table, shortlen + 1); |
45d6a902 | 1908 | if (shortname == NULL) |
0a1b45a2 | 1909 | return false; |
45d6a902 AM |
1910 | memcpy (shortname, name, shortlen); |
1911 | shortname[shortlen] = '\0'; | |
1912 | ||
1913 | /* We are going to create a new symbol. Merge it with any existing | |
1914 | symbol with this name. For the purposes of the merge, act as | |
1915 | though we were defining the symbol we just defined, although we | |
1916 | actually going to define an indirect symbol. */ | |
0a1b45a2 AM |
1917 | type_change_ok = false; |
1918 | size_change_ok = false; | |
1919 | matched = true; | |
ffd65175 AM |
1920 | tmp_sec = sec; |
1921 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
f01fb44c | 1922 | &hi, poldbfd, NULL, NULL, &skip, &override, |
6e33951e | 1923 | &type_change_ok, &size_change_ok, &matched)) |
0a1b45a2 | 1924 | return false; |
45d6a902 AM |
1925 | |
1926 | if (skip) | |
1927 | goto nondefault; | |
1928 | ||
5fa370e4 | 1929 | if (hi->def_regular || ELF_COMMON_DEF_P (hi)) |
5b677558 AM |
1930 | { |
1931 | /* If the undecorated symbol will have a version added by a | |
1932 | script different to H, then don't indirect to/from the | |
1933 | undecorated symbol. This isn't ideal because we may not yet | |
1934 | have seen symbol versions, if given by a script on the | |
1935 | command line rather than via --version-script. */ | |
1936 | if (hi->verinfo.vertree == NULL && info->version_info != NULL) | |
1937 | { | |
0a1b45a2 | 1938 | bool hide; |
5b677558 AM |
1939 | |
1940 | hi->verinfo.vertree | |
1941 | = bfd_find_version_for_sym (info->version_info, | |
1942 | hi->root.root.string, &hide); | |
1943 | if (hi->verinfo.vertree != NULL && hide) | |
1944 | { | |
0a1b45a2 | 1945 | (*bed->elf_backend_hide_symbol) (info, hi, true); |
5b677558 AM |
1946 | goto nondefault; |
1947 | } | |
1948 | } | |
1949 | if (hi->verinfo.vertree != NULL | |
1950 | && strcmp (p + 1 + (p[1] == '@'), hi->verinfo.vertree->name) != 0) | |
f01fb44c | 1951 | goto nondefault; |
5b677558 AM |
1952 | } |
1953 | ||
f01fb44c | 1954 | if (! override) |
45d6a902 | 1955 | { |
c6e8a9a8 | 1956 | /* Add the default symbol if not performing a relocatable link. */ |
0e1862bb | 1957 | if (! bfd_link_relocatable (info)) |
c6e8a9a8 L |
1958 | { |
1959 | bh = &hi->root; | |
fbcc8baf | 1960 | if (bh->type == bfd_link_hash_defined |
6cc71b82 | 1961 | && bh->u.def.section->owner != NULL |
fbcc8baf L |
1962 | && (bh->u.def.section->owner->flags & BFD_PLUGIN) != 0) |
1963 | { | |
1964 | /* Mark the previous definition from IR object as | |
1965 | undefined so that the generic linker will override | |
1966 | it. */ | |
1967 | bh->type = bfd_link_hash_undefined; | |
1968 | bh->u.undef.abfd = bh->u.def.section->owner; | |
1969 | } | |
c6e8a9a8 L |
1970 | if (! (_bfd_generic_link_add_one_symbol |
1971 | (info, abfd, shortname, BSF_INDIRECT, | |
1972 | bfd_ind_section_ptr, | |
0a1b45a2 AM |
1973 | 0, name, false, collect, &bh))) |
1974 | return false; | |
c6e8a9a8 L |
1975 | hi = (struct elf_link_hash_entry *) bh; |
1976 | } | |
45d6a902 AM |
1977 | } |
1978 | else | |
1979 | { | |
1980 | /* In this case the symbol named SHORTNAME is overriding the | |
1981 | indirect symbol we want to add. We were planning on making | |
1982 | SHORTNAME an indirect symbol referring to NAME. SHORTNAME | |
1983 | is the name without a version. NAME is the fully versioned | |
1984 | name, and it is the default version. | |
1985 | ||
1986 | Overriding means that we already saw a definition for the | |
1987 | symbol SHORTNAME in a regular object, and it is overriding | |
1988 | the symbol defined in the dynamic object. | |
1989 | ||
1990 | When this happens, we actually want to change NAME, the | |
1991 | symbol we just added, to refer to SHORTNAME. This will cause | |
1992 | references to NAME in the shared object to become references | |
1993 | to SHORTNAME in the regular object. This is what we expect | |
1994 | when we override a function in a shared object: that the | |
1995 | references in the shared object will be mapped to the | |
1996 | definition in the regular object. */ | |
1997 | ||
1998 | while (hi->root.type == bfd_link_hash_indirect | |
1999 | || hi->root.type == bfd_link_hash_warning) | |
2000 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
2001 | ||
2002 | h->root.type = bfd_link_hash_indirect; | |
2003 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; | |
f5385ebf | 2004 | if (h->def_dynamic) |
45d6a902 | 2005 | { |
f5385ebf AM |
2006 | h->def_dynamic = 0; |
2007 | hi->ref_dynamic = 1; | |
2008 | if (hi->ref_regular | |
2009 | || hi->def_regular) | |
45d6a902 | 2010 | { |
c152c796 | 2011 | if (! bfd_elf_link_record_dynamic_symbol (info, hi)) |
0a1b45a2 | 2012 | return false; |
45d6a902 AM |
2013 | } |
2014 | } | |
2015 | ||
2016 | /* Now set HI to H, so that the following code will set the | |
2017 | other fields correctly. */ | |
2018 | hi = h; | |
2019 | } | |
2020 | ||
fab4a87f L |
2021 | /* Check if HI is a warning symbol. */ |
2022 | if (hi->root.type == bfd_link_hash_warning) | |
2023 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
2024 | ||
45d6a902 AM |
2025 | /* If there is a duplicate definition somewhere, then HI may not |
2026 | point to an indirect symbol. We will have reported an error to | |
2027 | the user in that case. */ | |
2028 | ||
2029 | if (hi->root.type == bfd_link_hash_indirect) | |
2030 | { | |
2031 | struct elf_link_hash_entry *ht; | |
2032 | ||
45d6a902 | 2033 | ht = (struct elf_link_hash_entry *) hi->root.u.i.link; |
fcfa13d2 | 2034 | (*bed->elf_backend_copy_indirect_symbol) (info, ht, hi); |
45d6a902 | 2035 | |
5160d0f3 AM |
2036 | /* If we first saw a reference to SHORTNAME with non-default |
2037 | visibility, merge that visibility to the @@VER symbol. */ | |
0a1b45a2 | 2038 | elf_merge_st_other (abfd, ht, hi->other, sec, true, dynamic); |
5160d0f3 | 2039 | |
68c88cd4 AM |
2040 | /* A reference to the SHORTNAME symbol from a dynamic library |
2041 | will be satisfied by the versioned symbol at runtime. In | |
2042 | effect, we have a reference to the versioned symbol. */ | |
2043 | ht->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; | |
2044 | hi->dynamic_def |= ht->dynamic_def; | |
2045 | ||
45d6a902 AM |
2046 | /* See if the new flags lead us to realize that the symbol must |
2047 | be dynamic. */ | |
2048 | if (! *dynsym) | |
2049 | { | |
2050 | if (! dynamic) | |
2051 | { | |
0e1862bb | 2052 | if (! bfd_link_executable (info) |
90c984fc | 2053 | || hi->def_dynamic |
f5385ebf | 2054 | || hi->ref_dynamic) |
0a1b45a2 | 2055 | *dynsym = true; |
45d6a902 AM |
2056 | } |
2057 | else | |
2058 | { | |
f5385ebf | 2059 | if (hi->ref_regular) |
0a1b45a2 | 2060 | *dynsym = true; |
45d6a902 AM |
2061 | } |
2062 | } | |
2063 | } | |
2064 | ||
2065 | /* We also need to define an indirection from the nondefault version | |
2066 | of the symbol. */ | |
2067 | ||
dc1e8a47 | 2068 | nondefault: |
45d6a902 | 2069 | len = strlen (name); |
a50b1753 | 2070 | shortname = (char *) bfd_hash_allocate (&info->hash->table, len); |
45d6a902 | 2071 | if (shortname == NULL) |
0a1b45a2 | 2072 | return false; |
45d6a902 AM |
2073 | memcpy (shortname, name, shortlen); |
2074 | memcpy (shortname + shortlen, p + 1, len - shortlen); | |
2075 | ||
2076 | /* Once again, merge with any existing symbol. */ | |
0a1b45a2 AM |
2077 | type_change_ok = false; |
2078 | size_change_ok = false; | |
ffd65175 AM |
2079 | tmp_sec = sec; |
2080 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
f01fb44c | 2081 | &hi, poldbfd, NULL, NULL, &skip, &override, |
6e33951e | 2082 | &type_change_ok, &size_change_ok, &matched)) |
0a1b45a2 | 2083 | return false; |
45d6a902 AM |
2084 | |
2085 | if (skip) | |
726d7d1e AM |
2086 | { |
2087 | if (!dynamic | |
2088 | && h->root.type == bfd_link_hash_defweak | |
2089 | && hi->root.type == bfd_link_hash_defined) | |
2090 | { | |
2091 | /* We are handling a weak sym@@ver and attempting to define | |
2092 | a weak sym@ver, but _bfd_elf_merge_symbol said to skip the | |
2093 | new weak sym@ver because there is already a strong sym@ver. | |
2094 | However, sym@ver and sym@@ver are really the same symbol. | |
2095 | The existing strong sym@ver ought to override sym@@ver. */ | |
2096 | h->root.type = bfd_link_hash_defined; | |
2097 | h->root.u.def.section = hi->root.u.def.section; | |
2098 | h->root.u.def.value = hi->root.u.def.value; | |
2099 | hi->root.type = bfd_link_hash_indirect; | |
2100 | hi->root.u.i.link = &h->root; | |
2101 | } | |
2102 | else | |
0a1b45a2 | 2103 | return true; |
726d7d1e | 2104 | } |
f01fb44c | 2105 | else if (override) |
45d6a902 AM |
2106 | { |
2107 | /* Here SHORTNAME is a versioned name, so we don't expect to see | |
2108 | the type of override we do in the case above unless it is | |
4cc11e76 | 2109 | overridden by a versioned definition. */ |
45d6a902 AM |
2110 | if (hi->root.type != bfd_link_hash_defined |
2111 | && hi->root.type != bfd_link_hash_defweak) | |
4eca0228 | 2112 | _bfd_error_handler |
695344c0 | 2113 | /* xgettext:c-format */ |
871b3ab2 | 2114 | (_("%pB: unexpected redefinition of indirect versioned symbol `%s'"), |
d003868e | 2115 | abfd, shortname); |
0a1b45a2 | 2116 | return true; |
45d6a902 AM |
2117 | } |
2118 | else | |
2119 | { | |
2120 | bh = &hi->root; | |
2121 | if (! (_bfd_generic_link_add_one_symbol | |
2122 | (info, abfd, shortname, BSF_INDIRECT, | |
0a1b45a2 AM |
2123 | bfd_ind_section_ptr, 0, name, false, collect, &bh))) |
2124 | return false; | |
45d6a902 | 2125 | hi = (struct elf_link_hash_entry *) bh; |
726d7d1e | 2126 | } |
45d6a902 | 2127 | |
726d7d1e AM |
2128 | /* If there is a duplicate definition somewhere, then HI may not |
2129 | point to an indirect symbol. We will have reported an error | |
2130 | to the user in that case. */ | |
2131 | if (hi->root.type == bfd_link_hash_indirect) | |
2132 | { | |
2133 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); | |
2134 | h->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; | |
2135 | hi->dynamic_def |= h->dynamic_def; | |
45d6a902 | 2136 | |
726d7d1e AM |
2137 | /* If we first saw a reference to @VER symbol with |
2138 | non-default visibility, merge that visibility to the | |
2139 | @@VER symbol. */ | |
0a1b45a2 | 2140 | elf_merge_st_other (abfd, h, hi->other, sec, true, dynamic); |
726d7d1e AM |
2141 | |
2142 | /* See if the new flags lead us to realize that the symbol | |
2143 | must be dynamic. */ | |
2144 | if (! *dynsym) | |
45d6a902 | 2145 | { |
726d7d1e | 2146 | if (! dynamic) |
45d6a902 | 2147 | { |
726d7d1e AM |
2148 | if (! bfd_link_executable (info) |
2149 | || hi->ref_dynamic) | |
0a1b45a2 | 2150 | *dynsym = true; |
726d7d1e AM |
2151 | } |
2152 | else | |
2153 | { | |
2154 | if (hi->ref_regular) | |
0a1b45a2 | 2155 | *dynsym = true; |
45d6a902 AM |
2156 | } |
2157 | } | |
2158 | } | |
2159 | ||
0a1b45a2 | 2160 | return true; |
45d6a902 AM |
2161 | } |
2162 | \f | |
2163 | /* This routine is used to export all defined symbols into the dynamic | |
2164 | symbol table. It is called via elf_link_hash_traverse. */ | |
2165 | ||
0a1b45a2 | 2166 | static bool |
268b6b39 | 2167 | _bfd_elf_export_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2168 | { |
a50b1753 | 2169 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 AM |
2170 | |
2171 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
2172 | if (h->root.type == bfd_link_hash_indirect) | |
0a1b45a2 | 2173 | return true; |
45d6a902 | 2174 | |
7686d77d AM |
2175 | /* Ignore this if we won't export it. */ |
2176 | if (!eif->info->export_dynamic && !h->dynamic) | |
0a1b45a2 | 2177 | return true; |
45d6a902 AM |
2178 | |
2179 | if (h->dynindx == -1 | |
fd91d419 L |
2180 | && (h->def_regular || h->ref_regular) |
2181 | && ! bfd_hide_sym_by_version (eif->info->version_info, | |
2182 | h->root.root.string)) | |
45d6a902 | 2183 | { |
fd91d419 | 2184 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 | 2185 | { |
0a1b45a2 AM |
2186 | eif->failed = true; |
2187 | return false; | |
45d6a902 AM |
2188 | } |
2189 | } | |
2190 | ||
0a1b45a2 | 2191 | return true; |
45d6a902 AM |
2192 | } |
2193 | \f | |
2194 | /* Look through the symbols which are defined in other shared | |
2195 | libraries and referenced here. Update the list of version | |
2196 | dependencies. This will be put into the .gnu.version_r section. | |
2197 | This function is called via elf_link_hash_traverse. */ | |
2198 | ||
0a1b45a2 | 2199 | static bool |
268b6b39 AM |
2200 | _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry *h, |
2201 | void *data) | |
45d6a902 | 2202 | { |
a50b1753 | 2203 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; |
45d6a902 AM |
2204 | Elf_Internal_Verneed *t; |
2205 | Elf_Internal_Vernaux *a; | |
986f0783 | 2206 | size_t amt; |
45d6a902 | 2207 | |
45d6a902 AM |
2208 | /* We only care about symbols defined in shared objects with version |
2209 | information. */ | |
f5385ebf AM |
2210 | if (!h->def_dynamic |
2211 | || h->def_regular | |
45d6a902 | 2212 | || h->dynindx == -1 |
7b20f099 AM |
2213 | || h->verinfo.verdef == NULL |
2214 | || (elf_dyn_lib_class (h->verinfo.verdef->vd_bfd) | |
2215 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | DYN_NO_NEEDED))) | |
0a1b45a2 | 2216 | return true; |
45d6a902 AM |
2217 | |
2218 | /* See if we already know about this version. */ | |
28caa186 AM |
2219 | for (t = elf_tdata (rinfo->info->output_bfd)->verref; |
2220 | t != NULL; | |
2221 | t = t->vn_nextref) | |
45d6a902 AM |
2222 | { |
2223 | if (t->vn_bfd != h->verinfo.verdef->vd_bfd) | |
2224 | continue; | |
2225 | ||
2226 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2227 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
0a1b45a2 | 2228 | return true; |
45d6a902 AM |
2229 | |
2230 | break; | |
2231 | } | |
2232 | ||
2233 | /* This is a new version. Add it to tree we are building. */ | |
2234 | ||
2235 | if (t == NULL) | |
2236 | { | |
2237 | amt = sizeof *t; | |
a50b1753 | 2238 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->info->output_bfd, amt); |
45d6a902 AM |
2239 | if (t == NULL) |
2240 | { | |
0a1b45a2 AM |
2241 | rinfo->failed = true; |
2242 | return false; | |
45d6a902 AM |
2243 | } |
2244 | ||
2245 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
28caa186 AM |
2246 | t->vn_nextref = elf_tdata (rinfo->info->output_bfd)->verref; |
2247 | elf_tdata (rinfo->info->output_bfd)->verref = t; | |
45d6a902 AM |
2248 | } |
2249 | ||
2250 | amt = sizeof *a; | |
a50b1753 | 2251 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->info->output_bfd, amt); |
14b1c01e AM |
2252 | if (a == NULL) |
2253 | { | |
0a1b45a2 AM |
2254 | rinfo->failed = true; |
2255 | return false; | |
14b1c01e | 2256 | } |
45d6a902 AM |
2257 | |
2258 | /* Note that we are copying a string pointer here, and testing it | |
2259 | above. If bfd_elf_string_from_elf_section is ever changed to | |
2260 | discard the string data when low in memory, this will have to be | |
2261 | fixed. */ | |
2262 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
2263 | ||
2264 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
2265 | a->vna_nextptr = t->vn_auxptr; | |
2266 | ||
2267 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
2268 | ++rinfo->vers; | |
2269 | ||
2270 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
2271 | ||
2272 | t->vn_auxptr = a; | |
2273 | ||
0a1b45a2 | 2274 | return true; |
45d6a902 AM |
2275 | } |
2276 | ||
099bb8fb L |
2277 | /* Return TRUE and set *HIDE to TRUE if the versioned symbol is |
2278 | hidden. Set *T_P to NULL if there is no match. */ | |
2279 | ||
0a1b45a2 | 2280 | static bool |
099bb8fb L |
2281 | _bfd_elf_link_hide_versioned_symbol (struct bfd_link_info *info, |
2282 | struct elf_link_hash_entry *h, | |
2283 | const char *version_p, | |
2284 | struct bfd_elf_version_tree **t_p, | |
0a1b45a2 | 2285 | bool *hide) |
099bb8fb L |
2286 | { |
2287 | struct bfd_elf_version_tree *t; | |
2288 | ||
2289 | /* Look for the version. If we find it, it is no longer weak. */ | |
2290 | for (t = info->version_info; t != NULL; t = t->next) | |
2291 | { | |
2292 | if (strcmp (t->name, version_p) == 0) | |
2293 | { | |
2294 | size_t len; | |
2295 | char *alc; | |
2296 | struct bfd_elf_version_expr *d; | |
2297 | ||
2298 | len = version_p - h->root.root.string; | |
2299 | alc = (char *) bfd_malloc (len); | |
2300 | if (alc == NULL) | |
0a1b45a2 | 2301 | return false; |
099bb8fb L |
2302 | memcpy (alc, h->root.root.string, len - 1); |
2303 | alc[len - 1] = '\0'; | |
2304 | if (alc[len - 2] == ELF_VER_CHR) | |
2305 | alc[len - 2] = '\0'; | |
2306 | ||
2307 | h->verinfo.vertree = t; | |
0a1b45a2 | 2308 | t->used = true; |
099bb8fb L |
2309 | d = NULL; |
2310 | ||
2311 | if (t->globals.list != NULL) | |
2312 | d = (*t->match) (&t->globals, NULL, alc); | |
2313 | ||
2314 | /* See if there is anything to force this symbol to | |
2315 | local scope. */ | |
2316 | if (d == NULL && t->locals.list != NULL) | |
2317 | { | |
2318 | d = (*t->match) (&t->locals, NULL, alc); | |
2319 | if (d != NULL | |
2320 | && h->dynindx != -1 | |
2321 | && ! info->export_dynamic) | |
0a1b45a2 | 2322 | *hide = true; |
099bb8fb L |
2323 | } |
2324 | ||
2325 | free (alc); | |
2326 | break; | |
2327 | } | |
2328 | } | |
2329 | ||
2330 | *t_p = t; | |
2331 | ||
0a1b45a2 | 2332 | return true; |
099bb8fb L |
2333 | } |
2334 | ||
2335 | /* Return TRUE if the symbol H is hidden by version script. */ | |
2336 | ||
0a1b45a2 | 2337 | bool |
099bb8fb L |
2338 | _bfd_elf_link_hide_sym_by_version (struct bfd_link_info *info, |
2339 | struct elf_link_hash_entry *h) | |
2340 | { | |
2341 | const char *p; | |
0a1b45a2 | 2342 | bool hide = false; |
099bb8fb L |
2343 | const struct elf_backend_data *bed |
2344 | = get_elf_backend_data (info->output_bfd); | |
2345 | ||
2346 | /* Version script only hides symbols defined in regular objects. */ | |
2347 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) | |
0a1b45a2 | 2348 | return true; |
099bb8fb L |
2349 | |
2350 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
2351 | if (p != NULL && h->verinfo.vertree == NULL) | |
2352 | { | |
2353 | struct bfd_elf_version_tree *t; | |
2354 | ||
2355 | ++p; | |
2356 | if (*p == ELF_VER_CHR) | |
2357 | ++p; | |
2358 | ||
2359 | if (*p != '\0' | |
2360 | && _bfd_elf_link_hide_versioned_symbol (info, h, p, &t, &hide) | |
2361 | && hide) | |
2362 | { | |
2363 | if (hide) | |
0a1b45a2 AM |
2364 | (*bed->elf_backend_hide_symbol) (info, h, true); |
2365 | return true; | |
099bb8fb L |
2366 | } |
2367 | } | |
2368 | ||
2369 | /* If we don't have a version for this symbol, see if we can find | |
2370 | something. */ | |
2371 | if (h->verinfo.vertree == NULL && info->version_info != NULL) | |
2372 | { | |
2373 | h->verinfo.vertree | |
2374 | = bfd_find_version_for_sym (info->version_info, | |
2375 | h->root.root.string, &hide); | |
2376 | if (h->verinfo.vertree != NULL && hide) | |
2377 | { | |
0a1b45a2 AM |
2378 | (*bed->elf_backend_hide_symbol) (info, h, true); |
2379 | return true; | |
099bb8fb L |
2380 | } |
2381 | } | |
2382 | ||
0a1b45a2 | 2383 | return false; |
099bb8fb L |
2384 | } |
2385 | ||
45d6a902 AM |
2386 | /* Figure out appropriate versions for all the symbols. We may not |
2387 | have the version number script until we have read all of the input | |
2388 | files, so until that point we don't know which symbols should be | |
2389 | local. This function is called via elf_link_hash_traverse. */ | |
2390 | ||
0a1b45a2 | 2391 | static bool |
268b6b39 | 2392 | _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2393 | { |
28caa186 | 2394 | struct elf_info_failed *sinfo; |
45d6a902 | 2395 | struct bfd_link_info *info; |
9c5bfbb7 | 2396 | const struct elf_backend_data *bed; |
45d6a902 AM |
2397 | struct elf_info_failed eif; |
2398 | char *p; | |
0a1b45a2 | 2399 | bool hide; |
45d6a902 | 2400 | |
a50b1753 | 2401 | sinfo = (struct elf_info_failed *) data; |
45d6a902 AM |
2402 | info = sinfo->info; |
2403 | ||
45d6a902 | 2404 | /* Fix the symbol flags. */ |
0a1b45a2 | 2405 | eif.failed = false; |
45d6a902 AM |
2406 | eif.info = info; |
2407 | if (! _bfd_elf_fix_symbol_flags (h, &eif)) | |
2408 | { | |
2409 | if (eif.failed) | |
0a1b45a2 AM |
2410 | sinfo->failed = true; |
2411 | return false; | |
45d6a902 AM |
2412 | } |
2413 | ||
0a640d71 L |
2414 | bed = get_elf_backend_data (info->output_bfd); |
2415 | ||
45d6a902 AM |
2416 | /* We only need version numbers for symbols defined in regular |
2417 | objects. */ | |
5fa370e4 | 2418 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
0a640d71 L |
2419 | { |
2420 | /* Hide symbols defined in discarded input sections. */ | |
2421 | if ((h->root.type == bfd_link_hash_defined | |
2422 | || h->root.type == bfd_link_hash_defweak) | |
2423 | && discarded_section (h->root.u.def.section)) | |
0a1b45a2 AM |
2424 | (*bed->elf_backend_hide_symbol) (info, h, true); |
2425 | return true; | |
0a640d71 | 2426 | } |
45d6a902 | 2427 | |
0a1b45a2 | 2428 | hide = false; |
45d6a902 AM |
2429 | p = strchr (h->root.root.string, ELF_VER_CHR); |
2430 | if (p != NULL && h->verinfo.vertree == NULL) | |
2431 | { | |
2432 | struct bfd_elf_version_tree *t; | |
45d6a902 | 2433 | |
45d6a902 AM |
2434 | ++p; |
2435 | if (*p == ELF_VER_CHR) | |
6e33951e | 2436 | ++p; |
45d6a902 AM |
2437 | |
2438 | /* If there is no version string, we can just return out. */ | |
2439 | if (*p == '\0') | |
0a1b45a2 | 2440 | return true; |
45d6a902 | 2441 | |
099bb8fb | 2442 | if (!_bfd_elf_link_hide_versioned_symbol (info, h, p, &t, &hide)) |
45d6a902 | 2443 | { |
0a1b45a2 AM |
2444 | sinfo->failed = true; |
2445 | return false; | |
45d6a902 AM |
2446 | } |
2447 | ||
099bb8fb | 2448 | if (hide) |
0a1b45a2 | 2449 | (*bed->elf_backend_hide_symbol) (info, h, true); |
099bb8fb | 2450 | |
45d6a902 AM |
2451 | /* If we are building an application, we need to create a |
2452 | version node for this version. */ | |
0e1862bb | 2453 | if (t == NULL && bfd_link_executable (info)) |
45d6a902 AM |
2454 | { |
2455 | struct bfd_elf_version_tree **pp; | |
2456 | int version_index; | |
2457 | ||
2458 | /* If we aren't going to export this symbol, we don't need | |
2459 | to worry about it. */ | |
2460 | if (h->dynindx == -1) | |
0a1b45a2 | 2461 | return true; |
45d6a902 | 2462 | |
ef53be89 AM |
2463 | t = (struct bfd_elf_version_tree *) bfd_zalloc (info->output_bfd, |
2464 | sizeof *t); | |
45d6a902 AM |
2465 | if (t == NULL) |
2466 | { | |
0a1b45a2 AM |
2467 | sinfo->failed = true; |
2468 | return false; | |
45d6a902 AM |
2469 | } |
2470 | ||
45d6a902 | 2471 | t->name = p; |
45d6a902 | 2472 | t->name_indx = (unsigned int) -1; |
0a1b45a2 | 2473 | t->used = true; |
45d6a902 AM |
2474 | |
2475 | version_index = 1; | |
2476 | /* Don't count anonymous version tag. */ | |
fd91d419 L |
2477 | if (sinfo->info->version_info != NULL |
2478 | && sinfo->info->version_info->vernum == 0) | |
45d6a902 | 2479 | version_index = 0; |
fd91d419 L |
2480 | for (pp = &sinfo->info->version_info; |
2481 | *pp != NULL; | |
2482 | pp = &(*pp)->next) | |
45d6a902 AM |
2483 | ++version_index; |
2484 | t->vernum = version_index; | |
2485 | ||
2486 | *pp = t; | |
2487 | ||
2488 | h->verinfo.vertree = t; | |
2489 | } | |
2490 | else if (t == NULL) | |
2491 | { | |
2492 | /* We could not find the version for a symbol when | |
2493 | generating a shared archive. Return an error. */ | |
4eca0228 | 2494 | _bfd_error_handler |
695344c0 | 2495 | /* xgettext:c-format */ |
871b3ab2 | 2496 | (_("%pB: version node not found for symbol %s"), |
28caa186 | 2497 | info->output_bfd, h->root.root.string); |
45d6a902 | 2498 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 AM |
2499 | sinfo->failed = true; |
2500 | return false; | |
45d6a902 | 2501 | } |
45d6a902 AM |
2502 | } |
2503 | ||
2504 | /* If we don't have a version for this symbol, see if we can find | |
2505 | something. */ | |
099bb8fb L |
2506 | if (!hide |
2507 | && h->verinfo.vertree == NULL | |
2508 | && sinfo->info->version_info != NULL) | |
45d6a902 | 2509 | { |
fd91d419 L |
2510 | h->verinfo.vertree |
2511 | = bfd_find_version_for_sym (sinfo->info->version_info, | |
2512 | h->root.root.string, &hide); | |
1e8fa21e | 2513 | if (h->verinfo.vertree != NULL && hide) |
0a1b45a2 | 2514 | (*bed->elf_backend_hide_symbol) (info, h, true); |
45d6a902 AM |
2515 | } |
2516 | ||
0a1b45a2 | 2517 | return true; |
45d6a902 AM |
2518 | } |
2519 | \f | |
45d6a902 AM |
2520 | /* Read and swap the relocs from the section indicated by SHDR. This |
2521 | may be either a REL or a RELA section. The relocations are | |
2522 | translated into RELA relocations and stored in INTERNAL_RELOCS, | |
2523 | which should have already been allocated to contain enough space. | |
2524 | The EXTERNAL_RELOCS are a buffer where the external form of the | |
2525 | relocations should be stored. | |
2526 | ||
2527 | Returns FALSE if something goes wrong. */ | |
2528 | ||
0a1b45a2 | 2529 | static bool |
268b6b39 | 2530 | elf_link_read_relocs_from_section (bfd *abfd, |
243ef1e0 | 2531 | asection *sec, |
268b6b39 AM |
2532 | Elf_Internal_Shdr *shdr, |
2533 | void *external_relocs, | |
2534 | Elf_Internal_Rela *internal_relocs) | |
45d6a902 | 2535 | { |
9c5bfbb7 | 2536 | const struct elf_backend_data *bed; |
268b6b39 | 2537 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
45d6a902 AM |
2538 | const bfd_byte *erela; |
2539 | const bfd_byte *erelaend; | |
2540 | Elf_Internal_Rela *irela; | |
243ef1e0 L |
2541 | Elf_Internal_Shdr *symtab_hdr; |
2542 | size_t nsyms; | |
45d6a902 | 2543 | |
45d6a902 AM |
2544 | /* Position ourselves at the start of the section. */ |
2545 | if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0) | |
0a1b45a2 | 2546 | return false; |
45d6a902 AM |
2547 | |
2548 | /* Read the relocations. */ | |
2549 | if (bfd_bread (external_relocs, shdr->sh_size, abfd) != shdr->sh_size) | |
0a1b45a2 | 2550 | return false; |
45d6a902 | 2551 | |
243ef1e0 | 2552 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
ce98a316 | 2553 | nsyms = NUM_SHDR_ENTRIES (symtab_hdr); |
243ef1e0 | 2554 | |
45d6a902 AM |
2555 | bed = get_elf_backend_data (abfd); |
2556 | ||
2557 | /* Convert the external relocations to the internal format. */ | |
2558 | if (shdr->sh_entsize == bed->s->sizeof_rel) | |
2559 | swap_in = bed->s->swap_reloc_in; | |
2560 | else if (shdr->sh_entsize == bed->s->sizeof_rela) | |
2561 | swap_in = bed->s->swap_reloca_in; | |
2562 | else | |
2563 | { | |
2564 | bfd_set_error (bfd_error_wrong_format); | |
0a1b45a2 | 2565 | return false; |
45d6a902 AM |
2566 | } |
2567 | ||
a50b1753 | 2568 | erela = (const bfd_byte *) external_relocs; |
f55b1e32 AM |
2569 | /* Setting erelaend like this and comparing with <= handles case of |
2570 | a fuzzed object with sh_size not a multiple of sh_entsize. */ | |
2571 | erelaend = erela + shdr->sh_size - shdr->sh_entsize; | |
45d6a902 | 2572 | irela = internal_relocs; |
f55b1e32 | 2573 | while (erela <= erelaend) |
45d6a902 | 2574 | { |
243ef1e0 L |
2575 | bfd_vma r_symndx; |
2576 | ||
45d6a902 | 2577 | (*swap_in) (abfd, erela, irela); |
243ef1e0 L |
2578 | r_symndx = ELF32_R_SYM (irela->r_info); |
2579 | if (bed->s->arch_size == 64) | |
2580 | r_symndx >>= 24; | |
ce98a316 NC |
2581 | if (nsyms > 0) |
2582 | { | |
2583 | if ((size_t) r_symndx >= nsyms) | |
2584 | { | |
4eca0228 | 2585 | _bfd_error_handler |
695344c0 | 2586 | /* xgettext:c-format */ |
2dcf00ce AM |
2587 | (_("%pB: bad reloc symbol index (%#" PRIx64 " >= %#lx)" |
2588 | " for offset %#" PRIx64 " in section `%pA'"), | |
2589 | abfd, (uint64_t) r_symndx, (unsigned long) nsyms, | |
2590 | (uint64_t) irela->r_offset, sec); | |
ce98a316 | 2591 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 2592 | return false; |
ce98a316 NC |
2593 | } |
2594 | } | |
cf35638d | 2595 | else if (r_symndx != STN_UNDEF) |
243ef1e0 | 2596 | { |
4eca0228 | 2597 | _bfd_error_handler |
695344c0 | 2598 | /* xgettext:c-format */ |
2dcf00ce AM |
2599 | (_("%pB: non-zero symbol index (%#" PRIx64 ")" |
2600 | " for offset %#" PRIx64 " in section `%pA'" | |
ce98a316 | 2601 | " when the object file has no symbol table"), |
2dcf00ce AM |
2602 | abfd, (uint64_t) r_symndx, |
2603 | (uint64_t) irela->r_offset, sec); | |
243ef1e0 | 2604 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 2605 | return false; |
243ef1e0 | 2606 | } |
45d6a902 AM |
2607 | irela += bed->s->int_rels_per_ext_rel; |
2608 | erela += shdr->sh_entsize; | |
2609 | } | |
2610 | ||
0a1b45a2 | 2611 | return true; |
45d6a902 AM |
2612 | } |
2613 | ||
2614 | /* Read and swap the relocs for a section O. They may have been | |
2615 | cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are | |
2616 | not NULL, they are used as buffers to read into. They are known to | |
2617 | be large enough. If the INTERNAL_RELOCS relocs argument is NULL, | |
2618 | the return value is allocated using either malloc or bfd_alloc, | |
2619 | according to the KEEP_MEMORY argument. If O has two relocation | |
2620 | sections (both REL and RELA relocations), then the REL_HDR | |
2621 | relocations will appear first in INTERNAL_RELOCS, followed by the | |
d4730f92 | 2622 | RELA_HDR relocations. */ |
45d6a902 AM |
2623 | |
2624 | Elf_Internal_Rela * | |
268b6b39 AM |
2625 | _bfd_elf_link_read_relocs (bfd *abfd, |
2626 | asection *o, | |
2627 | void *external_relocs, | |
2628 | Elf_Internal_Rela *internal_relocs, | |
0a1b45a2 | 2629 | bool keep_memory) |
45d6a902 | 2630 | { |
268b6b39 | 2631 | void *alloc1 = NULL; |
45d6a902 | 2632 | Elf_Internal_Rela *alloc2 = NULL; |
9c5bfbb7 | 2633 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
d4730f92 BS |
2634 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
2635 | Elf_Internal_Rela *internal_rela_relocs; | |
45d6a902 | 2636 | |
d4730f92 BS |
2637 | if (esdo->relocs != NULL) |
2638 | return esdo->relocs; | |
45d6a902 AM |
2639 | |
2640 | if (o->reloc_count == 0) | |
2641 | return NULL; | |
2642 | ||
45d6a902 AM |
2643 | if (internal_relocs == NULL) |
2644 | { | |
2645 | bfd_size_type size; | |
2646 | ||
056bafd4 | 2647 | size = (bfd_size_type) o->reloc_count * sizeof (Elf_Internal_Rela); |
45d6a902 | 2648 | if (keep_memory) |
a50b1753 | 2649 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_alloc (abfd, size); |
45d6a902 | 2650 | else |
a50b1753 | 2651 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); |
45d6a902 AM |
2652 | if (internal_relocs == NULL) |
2653 | goto error_return; | |
2654 | } | |
2655 | ||
2656 | if (external_relocs == NULL) | |
2657 | { | |
d4730f92 BS |
2658 | bfd_size_type size = 0; |
2659 | ||
2660 | if (esdo->rel.hdr) | |
2661 | size += esdo->rel.hdr->sh_size; | |
2662 | if (esdo->rela.hdr) | |
2663 | size += esdo->rela.hdr->sh_size; | |
45d6a902 | 2664 | |
268b6b39 | 2665 | alloc1 = bfd_malloc (size); |
45d6a902 AM |
2666 | if (alloc1 == NULL) |
2667 | goto error_return; | |
2668 | external_relocs = alloc1; | |
2669 | } | |
2670 | ||
d4730f92 BS |
2671 | internal_rela_relocs = internal_relocs; |
2672 | if (esdo->rel.hdr) | |
2673 | { | |
2674 | if (!elf_link_read_relocs_from_section (abfd, o, esdo->rel.hdr, | |
2675 | external_relocs, | |
2676 | internal_relocs)) | |
2677 | goto error_return; | |
2678 | external_relocs = (((bfd_byte *) external_relocs) | |
2679 | + esdo->rel.hdr->sh_size); | |
2680 | internal_rela_relocs += (NUM_SHDR_ENTRIES (esdo->rel.hdr) | |
2681 | * bed->s->int_rels_per_ext_rel); | |
2682 | } | |
2683 | ||
2684 | if (esdo->rela.hdr | |
2685 | && (!elf_link_read_relocs_from_section (abfd, o, esdo->rela.hdr, | |
2686 | external_relocs, | |
2687 | internal_rela_relocs))) | |
45d6a902 AM |
2688 | goto error_return; |
2689 | ||
2690 | /* Cache the results for next time, if we can. */ | |
2691 | if (keep_memory) | |
d4730f92 | 2692 | esdo->relocs = internal_relocs; |
45d6a902 | 2693 | |
c9594989 | 2694 | free (alloc1); |
45d6a902 AM |
2695 | |
2696 | /* Don't free alloc2, since if it was allocated we are passing it | |
2697 | back (under the name of internal_relocs). */ | |
2698 | ||
2699 | return internal_relocs; | |
2700 | ||
2701 | error_return: | |
c9594989 | 2702 | free (alloc1); |
45d6a902 | 2703 | if (alloc2 != NULL) |
4dd07732 AM |
2704 | { |
2705 | if (keep_memory) | |
2706 | bfd_release (abfd, alloc2); | |
2707 | else | |
2708 | free (alloc2); | |
2709 | } | |
45d6a902 AM |
2710 | return NULL; |
2711 | } | |
2712 | ||
2713 | /* Compute the size of, and allocate space for, REL_HDR which is the | |
2714 | section header for a section containing relocations for O. */ | |
2715 | ||
0a1b45a2 | 2716 | static bool |
9eaff861 AO |
2717 | _bfd_elf_link_size_reloc_section (bfd *abfd, |
2718 | struct bfd_elf_section_reloc_data *reldata) | |
45d6a902 | 2719 | { |
9eaff861 | 2720 | Elf_Internal_Shdr *rel_hdr = reldata->hdr; |
45d6a902 AM |
2721 | |
2722 | /* That allows us to calculate the size of the section. */ | |
9eaff861 | 2723 | rel_hdr->sh_size = rel_hdr->sh_entsize * reldata->count; |
45d6a902 AM |
2724 | |
2725 | /* The contents field must last into write_object_contents, so we | |
2726 | allocate it with bfd_alloc rather than malloc. Also since we | |
2727 | cannot be sure that the contents will actually be filled in, | |
2728 | we zero the allocated space. */ | |
a50b1753 | 2729 | rel_hdr->contents = (unsigned char *) bfd_zalloc (abfd, rel_hdr->sh_size); |
45d6a902 | 2730 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) |
0a1b45a2 | 2731 | return false; |
45d6a902 | 2732 | |
d4730f92 | 2733 | if (reldata->hashes == NULL && reldata->count) |
45d6a902 AM |
2734 | { |
2735 | struct elf_link_hash_entry **p; | |
2736 | ||
ca4be51c AM |
2737 | p = ((struct elf_link_hash_entry **) |
2738 | bfd_zmalloc (reldata->count * sizeof (*p))); | |
45d6a902 | 2739 | if (p == NULL) |
0a1b45a2 | 2740 | return false; |
45d6a902 | 2741 | |
d4730f92 | 2742 | reldata->hashes = p; |
45d6a902 AM |
2743 | } |
2744 | ||
0a1b45a2 | 2745 | return true; |
45d6a902 AM |
2746 | } |
2747 | ||
2748 | /* Copy the relocations indicated by the INTERNAL_RELOCS (which | |
2749 | originated from the section given by INPUT_REL_HDR) to the | |
2750 | OUTPUT_BFD. */ | |
2751 | ||
0a1b45a2 | 2752 | bool |
268b6b39 AM |
2753 | _bfd_elf_link_output_relocs (bfd *output_bfd, |
2754 | asection *input_section, | |
2755 | Elf_Internal_Shdr *input_rel_hdr, | |
eac338cf PB |
2756 | Elf_Internal_Rela *internal_relocs, |
2757 | struct elf_link_hash_entry **rel_hash | |
2758 | ATTRIBUTE_UNUSED) | |
45d6a902 AM |
2759 | { |
2760 | Elf_Internal_Rela *irela; | |
2761 | Elf_Internal_Rela *irelaend; | |
2762 | bfd_byte *erel; | |
d4730f92 | 2763 | struct bfd_elf_section_reloc_data *output_reldata; |
45d6a902 | 2764 | asection *output_section; |
9c5bfbb7 | 2765 | const struct elf_backend_data *bed; |
268b6b39 | 2766 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
d4730f92 | 2767 | struct bfd_elf_section_data *esdo; |
45d6a902 AM |
2768 | |
2769 | output_section = input_section->output_section; | |
45d6a902 | 2770 | |
d4730f92 BS |
2771 | bed = get_elf_backend_data (output_bfd); |
2772 | esdo = elf_section_data (output_section); | |
2773 | if (esdo->rel.hdr && esdo->rel.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2774 | { |
d4730f92 BS |
2775 | output_reldata = &esdo->rel; |
2776 | swap_out = bed->s->swap_reloc_out; | |
45d6a902 | 2777 | } |
d4730f92 BS |
2778 | else if (esdo->rela.hdr |
2779 | && esdo->rela.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2780 | { |
d4730f92 BS |
2781 | output_reldata = &esdo->rela; |
2782 | swap_out = bed->s->swap_reloca_out; | |
45d6a902 AM |
2783 | } |
2784 | else | |
2785 | { | |
4eca0228 | 2786 | _bfd_error_handler |
695344c0 | 2787 | /* xgettext:c-format */ |
871b3ab2 | 2788 | (_("%pB: relocation size mismatch in %pB section %pA"), |
d003868e | 2789 | output_bfd, input_section->owner, input_section); |
297d8443 | 2790 | bfd_set_error (bfd_error_wrong_format); |
0a1b45a2 | 2791 | return false; |
45d6a902 AM |
2792 | } |
2793 | ||
d4730f92 BS |
2794 | erel = output_reldata->hdr->contents; |
2795 | erel += output_reldata->count * input_rel_hdr->sh_entsize; | |
45d6a902 AM |
2796 | irela = internal_relocs; |
2797 | irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr) | |
2798 | * bed->s->int_rels_per_ext_rel); | |
2799 | while (irela < irelaend) | |
2800 | { | |
2801 | (*swap_out) (output_bfd, irela, erel); | |
2802 | irela += bed->s->int_rels_per_ext_rel; | |
2803 | erel += input_rel_hdr->sh_entsize; | |
2804 | } | |
2805 | ||
2806 | /* Bump the counter, so that we know where to add the next set of | |
2807 | relocations. */ | |
d4730f92 | 2808 | output_reldata->count += NUM_SHDR_ENTRIES (input_rel_hdr); |
45d6a902 | 2809 | |
0a1b45a2 | 2810 | return true; |
45d6a902 AM |
2811 | } |
2812 | \f | |
508c3946 L |
2813 | /* Make weak undefined symbols in PIE dynamic. */ |
2814 | ||
0a1b45a2 | 2815 | bool |
508c3946 L |
2816 | _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info *info, |
2817 | struct elf_link_hash_entry *h) | |
2818 | { | |
0e1862bb | 2819 | if (bfd_link_pie (info) |
508c3946 L |
2820 | && h->dynindx == -1 |
2821 | && h->root.type == bfd_link_hash_undefweak) | |
2822 | return bfd_elf_link_record_dynamic_symbol (info, h); | |
2823 | ||
0a1b45a2 | 2824 | return true; |
508c3946 L |
2825 | } |
2826 | ||
45d6a902 AM |
2827 | /* Fix up the flags for a symbol. This handles various cases which |
2828 | can only be fixed after all the input files are seen. This is | |
2829 | currently called by both adjust_dynamic_symbol and | |
2830 | assign_sym_version, which is unnecessary but perhaps more robust in | |
2831 | the face of future changes. */ | |
2832 | ||
0a1b45a2 | 2833 | static bool |
268b6b39 AM |
2834 | _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry *h, |
2835 | struct elf_info_failed *eif) | |
45d6a902 | 2836 | { |
33774f08 | 2837 | const struct elf_backend_data *bed; |
508c3946 | 2838 | |
45d6a902 AM |
2839 | /* If this symbol was mentioned in a non-ELF file, try to set |
2840 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
2841 | permit a non-ELF file to correctly refer to a symbol defined in | |
2842 | an ELF dynamic object. */ | |
f5385ebf | 2843 | if (h->non_elf) |
45d6a902 AM |
2844 | { |
2845 | while (h->root.type == bfd_link_hash_indirect) | |
2846 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2847 | ||
2848 | if (h->root.type != bfd_link_hash_defined | |
2849 | && h->root.type != bfd_link_hash_defweak) | |
f5385ebf AM |
2850 | { |
2851 | h->ref_regular = 1; | |
2852 | h->ref_regular_nonweak = 1; | |
2853 | } | |
45d6a902 AM |
2854 | else |
2855 | { | |
2856 | if (h->root.u.def.section->owner != NULL | |
2857 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
2858 | == bfd_target_elf_flavour)) | |
f5385ebf AM |
2859 | { |
2860 | h->ref_regular = 1; | |
2861 | h->ref_regular_nonweak = 1; | |
2862 | } | |
45d6a902 | 2863 | else |
f5385ebf | 2864 | h->def_regular = 1; |
45d6a902 AM |
2865 | } |
2866 | ||
2867 | if (h->dynindx == -1 | |
f5385ebf AM |
2868 | && (h->def_dynamic |
2869 | || h->ref_dynamic)) | |
45d6a902 | 2870 | { |
c152c796 | 2871 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 | 2872 | { |
0a1b45a2 AM |
2873 | eif->failed = true; |
2874 | return false; | |
45d6a902 AM |
2875 | } |
2876 | } | |
2877 | } | |
2878 | else | |
2879 | { | |
f5385ebf | 2880 | /* Unfortunately, NON_ELF is only correct if the symbol |
45d6a902 AM |
2881 | was first seen in a non-ELF file. Fortunately, if the symbol |
2882 | was first seen in an ELF file, we're probably OK unless the | |
2883 | symbol was defined in a non-ELF file. Catch that case here. | |
2884 | FIXME: We're still in trouble if the symbol was first seen in | |
2885 | a dynamic object, and then later in a non-ELF regular object. */ | |
2886 | if ((h->root.type == bfd_link_hash_defined | |
2887 | || h->root.type == bfd_link_hash_defweak) | |
f5385ebf | 2888 | && !h->def_regular |
45d6a902 AM |
2889 | && (h->root.u.def.section->owner != NULL |
2890 | ? (bfd_get_flavour (h->root.u.def.section->owner) | |
2891 | != bfd_target_elf_flavour) | |
2892 | : (bfd_is_abs_section (h->root.u.def.section) | |
f5385ebf AM |
2893 | && !h->def_dynamic))) |
2894 | h->def_regular = 1; | |
45d6a902 AM |
2895 | } |
2896 | ||
508c3946 | 2897 | /* Backend specific symbol fixup. */ |
33774f08 AM |
2898 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); |
2899 | if (bed->elf_backend_fixup_symbol | |
2900 | && !(*bed->elf_backend_fixup_symbol) (eif->info, h)) | |
0a1b45a2 | 2901 | return false; |
508c3946 | 2902 | |
45d6a902 AM |
2903 | /* If this is a final link, and the symbol was defined as a common |
2904 | symbol in a regular object file, and there was no definition in | |
2905 | any dynamic object, then the linker will have allocated space for | |
f5385ebf | 2906 | the symbol in a common section but the DEF_REGULAR |
45d6a902 AM |
2907 | flag will not have been set. */ |
2908 | if (h->root.type == bfd_link_hash_defined | |
f5385ebf AM |
2909 | && !h->def_regular |
2910 | && h->ref_regular | |
2911 | && !h->def_dynamic | |
96f29d96 | 2912 | && (h->root.u.def.section->owner->flags & (DYNAMIC | BFD_PLUGIN)) == 0) |
f5385ebf | 2913 | h->def_regular = 1; |
45d6a902 | 2914 | |
af0bfb9c AM |
2915 | /* Symbols defined in discarded sections shouldn't be dynamic. */ |
2916 | if (h->root.type == bfd_link_hash_undefined && h->indx == -3) | |
0a1b45a2 | 2917 | (*bed->elf_backend_hide_symbol) (eif->info, h, true); |
af0bfb9c | 2918 | |
4deb8f71 L |
2919 | /* If a weak undefined symbol has non-default visibility, we also |
2920 | hide it from the dynamic linker. */ | |
af0bfb9c AM |
2921 | else if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
2922 | && h->root.type == bfd_link_hash_undefweak) | |
0a1b45a2 | 2923 | (*bed->elf_backend_hide_symbol) (eif->info, h, true); |
4deb8f71 L |
2924 | |
2925 | /* A hidden versioned symbol in executable should be forced local if | |
2926 | it is is locally defined, not referenced by shared library and not | |
2927 | exported. */ | |
2928 | else if (bfd_link_executable (eif->info) | |
2929 | && h->versioned == versioned_hidden | |
2930 | && !eif->info->export_dynamic | |
2931 | && !h->dynamic | |
2932 | && !h->ref_dynamic | |
2933 | && h->def_regular) | |
0a1b45a2 | 2934 | (*bed->elf_backend_hide_symbol) (eif->info, h, true); |
4deb8f71 | 2935 | |
45d6a902 AM |
2936 | /* If -Bsymbolic was used (which means to bind references to global |
2937 | symbols to the definition within the shared object), and this | |
2938 | symbol was defined in a regular object, then it actually doesn't | |
9c7a29a3 AM |
2939 | need a PLT entry. Likewise, if the symbol has non-default |
2940 | visibility. If the symbol has hidden or internal visibility, we | |
c1be741f | 2941 | will force it local. */ |
4deb8f71 L |
2942 | else if (h->needs_plt |
2943 | && bfd_link_pic (eif->info) | |
2944 | && is_elf_hash_table (eif->info->hash) | |
2945 | && (SYMBOLIC_BIND (eif->info, h) | |
2946 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2947 | && h->def_regular) | |
45d6a902 | 2948 | { |
0a1b45a2 | 2949 | bool force_local; |
45d6a902 | 2950 | |
45d6a902 AM |
2951 | force_local = (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL |
2952 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN); | |
2953 | (*bed->elf_backend_hide_symbol) (eif->info, h, force_local); | |
2954 | } | |
2955 | ||
45d6a902 AM |
2956 | /* If this is a weak defined symbol in a dynamic object, and we know |
2957 | the real definition in the dynamic object, copy interesting flags | |
2958 | over to the real definition. */ | |
60d67dc8 | 2959 | if (h->is_weakalias) |
45d6a902 | 2960 | { |
60d67dc8 AM |
2961 | struct elf_link_hash_entry *def = weakdef (h); |
2962 | ||
45d6a902 AM |
2963 | /* If the real definition is defined by a regular object file, |
2964 | don't do anything special. See the longer description in | |
5b9d7a9a AM |
2965 | _bfd_elf_adjust_dynamic_symbol, below. If the def is not |
2966 | bfd_link_hash_defined as it was when put on the alias list | |
2967 | then it must have originally been a versioned symbol (for | |
2968 | which a non-versioned indirect symbol is created) and later | |
2969 | a definition for the non-versioned symbol is found. In that | |
2970 | case the indirection is flipped with the versioned symbol | |
2971 | becoming an indirect pointing at the non-versioned symbol. | |
2972 | Thus, not an alias any more. */ | |
2973 | if (def->def_regular | |
2974 | || def->root.type != bfd_link_hash_defined) | |
60d67dc8 AM |
2975 | { |
2976 | h = def; | |
2977 | while ((h = h->u.alias) != def) | |
2978 | h->is_weakalias = 0; | |
2979 | } | |
45d6a902 | 2980 | else |
a26587ba | 2981 | { |
4e6b54a6 AM |
2982 | while (h->root.type == bfd_link_hash_indirect) |
2983 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4e6b54a6 AM |
2984 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
2985 | || h->root.type == bfd_link_hash_defweak); | |
60d67dc8 | 2986 | BFD_ASSERT (def->def_dynamic); |
60d67dc8 | 2987 | (*bed->elf_backend_copy_indirect_symbol) (eif->info, def, h); |
a26587ba | 2988 | } |
45d6a902 AM |
2989 | } |
2990 | ||
0a1b45a2 | 2991 | return true; |
45d6a902 AM |
2992 | } |
2993 | ||
2994 | /* Make the backend pick a good value for a dynamic symbol. This is | |
2995 | called via elf_link_hash_traverse, and also calls itself | |
2996 | recursively. */ | |
2997 | ||
0a1b45a2 | 2998 | static bool |
268b6b39 | 2999 | _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 3000 | { |
a50b1753 | 3001 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
559192d8 | 3002 | struct elf_link_hash_table *htab; |
9c5bfbb7 | 3003 | const struct elf_backend_data *bed; |
45d6a902 | 3004 | |
0eddce27 | 3005 | if (! is_elf_hash_table (eif->info->hash)) |
0a1b45a2 | 3006 | return false; |
45d6a902 | 3007 | |
45d6a902 AM |
3008 | /* Ignore indirect symbols. These are added by the versioning code. */ |
3009 | if (h->root.type == bfd_link_hash_indirect) | |
0a1b45a2 | 3010 | return true; |
45d6a902 AM |
3011 | |
3012 | /* Fix the symbol flags. */ | |
3013 | if (! _bfd_elf_fix_symbol_flags (h, eif)) | |
0a1b45a2 | 3014 | return false; |
45d6a902 | 3015 | |
559192d8 AM |
3016 | htab = elf_hash_table (eif->info); |
3017 | bed = get_elf_backend_data (htab->dynobj); | |
3018 | ||
954b63d4 AM |
3019 | if (h->root.type == bfd_link_hash_undefweak) |
3020 | { | |
3021 | if (eif->info->dynamic_undefined_weak == 0) | |
0a1b45a2 | 3022 | (*bed->elf_backend_hide_symbol) (eif->info, h, true); |
954b63d4 AM |
3023 | else if (eif->info->dynamic_undefined_weak > 0 |
3024 | && h->ref_regular | |
3025 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3026 | && !bfd_hide_sym_by_version (eif->info->version_info, | |
3027 | h->root.root.string)) | |
3028 | { | |
3029 | if (!bfd_elf_link_record_dynamic_symbol (eif->info, h)) | |
3030 | { | |
0a1b45a2 AM |
3031 | eif->failed = true; |
3032 | return false; | |
954b63d4 AM |
3033 | } |
3034 | } | |
3035 | } | |
3036 | ||
45d6a902 AM |
3037 | /* If this symbol does not require a PLT entry, and it is not |
3038 | defined by a dynamic object, or is not referenced by a regular | |
3039 | object, ignore it. We do have to handle a weak defined symbol, | |
3040 | even if no regular object refers to it, if we decided to add it | |
3041 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
3042 | about symbols which are defined by one dynamic object and | |
3043 | referenced by another one? */ | |
f5385ebf | 3044 | if (!h->needs_plt |
91e21fb7 | 3045 | && h->type != STT_GNU_IFUNC |
f5385ebf AM |
3046 | && (h->def_regular |
3047 | || !h->def_dynamic | |
3048 | || (!h->ref_regular | |
60d67dc8 | 3049 | && (!h->is_weakalias || weakdef (h)->dynindx == -1)))) |
45d6a902 | 3050 | { |
a6aa5195 | 3051 | h->plt = elf_hash_table (eif->info)->init_plt_offset; |
0a1b45a2 | 3052 | return true; |
45d6a902 AM |
3053 | } |
3054 | ||
3055 | /* If we've already adjusted this symbol, don't do it again. This | |
3056 | can happen via a recursive call. */ | |
f5385ebf | 3057 | if (h->dynamic_adjusted) |
0a1b45a2 | 3058 | return true; |
45d6a902 AM |
3059 | |
3060 | /* Don't look at this symbol again. Note that we must set this | |
3061 | after checking the above conditions, because we may look at a | |
3062 | symbol once, decide not to do anything, and then get called | |
3063 | recursively later after REF_REGULAR is set below. */ | |
f5385ebf | 3064 | h->dynamic_adjusted = 1; |
45d6a902 AM |
3065 | |
3066 | /* If this is a weak definition, and we know a real definition, and | |
3067 | the real symbol is not itself defined by a regular object file, | |
3068 | then get a good value for the real definition. We handle the | |
3069 | real symbol first, for the convenience of the backend routine. | |
3070 | ||
3071 | Note that there is a confusing case here. If the real definition | |
3072 | is defined by a regular object file, we don't get the real symbol | |
3073 | from the dynamic object, but we do get the weak symbol. If the | |
3074 | processor backend uses a COPY reloc, then if some routine in the | |
3075 | dynamic object changes the real symbol, we will not see that | |
3076 | change in the corresponding weak symbol. This is the way other | |
3077 | ELF linkers work as well, and seems to be a result of the shared | |
3078 | library model. | |
3079 | ||
3080 | I will clarify this issue. Most SVR4 shared libraries define the | |
3081 | variable _timezone and define timezone as a weak synonym. The | |
3082 | tzset call changes _timezone. If you write | |
3083 | extern int timezone; | |
3084 | int _timezone = 5; | |
3085 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
3086 | you might expect that, since timezone is a synonym for _timezone, | |
3087 | the same number will print both times. However, if the processor | |
3088 | backend uses a COPY reloc, then actually timezone will be copied | |
3089 | into your process image, and, since you define _timezone | |
3090 | yourself, _timezone will not. Thus timezone and _timezone will | |
3091 | wind up at different memory locations. The tzset call will set | |
3092 | _timezone, leaving timezone unchanged. */ | |
3093 | ||
60d67dc8 | 3094 | if (h->is_weakalias) |
45d6a902 | 3095 | { |
60d67dc8 AM |
3096 | struct elf_link_hash_entry *def = weakdef (h); |
3097 | ||
ec24dc88 | 3098 | /* If we get to this point, there is an implicit reference to |
60d67dc8 AM |
3099 | the alias by a regular object file via the weak symbol H. */ |
3100 | def->ref_regular = 1; | |
45d6a902 | 3101 | |
ec24dc88 | 3102 | /* Ensure that the backend adjust_dynamic_symbol function sees |
60d67dc8 AM |
3103 | the strong alias before H by recursively calling ourselves. */ |
3104 | if (!_bfd_elf_adjust_dynamic_symbol (def, eif)) | |
0a1b45a2 | 3105 | return false; |
45d6a902 AM |
3106 | } |
3107 | ||
3108 | /* If a symbol has no type and no size and does not require a PLT | |
3109 | entry, then we are probably about to do the wrong thing here: we | |
3110 | are probably going to create a COPY reloc for an empty object. | |
3111 | This case can arise when a shared object is built with assembly | |
3112 | code, and the assembly code fails to set the symbol type. */ | |
3113 | if (h->size == 0 | |
3114 | && h->type == STT_NOTYPE | |
f5385ebf | 3115 | && !h->needs_plt) |
4eca0228 | 3116 | _bfd_error_handler |
45d6a902 AM |
3117 | (_("warning: type and size of dynamic symbol `%s' are not defined"), |
3118 | h->root.root.string); | |
3119 | ||
45d6a902 AM |
3120 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) |
3121 | { | |
0a1b45a2 AM |
3122 | eif->failed = true; |
3123 | return false; | |
45d6a902 AM |
3124 | } |
3125 | ||
0a1b45a2 | 3126 | return true; |
45d6a902 AM |
3127 | } |
3128 | ||
027297b7 L |
3129 | /* Adjust the dynamic symbol, H, for copy in the dynamic bss section, |
3130 | DYNBSS. */ | |
3131 | ||
0a1b45a2 | 3132 | bool |
6cabe1ea AM |
3133 | _bfd_elf_adjust_dynamic_copy (struct bfd_link_info *info, |
3134 | struct elf_link_hash_entry *h, | |
027297b7 L |
3135 | asection *dynbss) |
3136 | { | |
91ac5911 | 3137 | unsigned int power_of_two; |
027297b7 L |
3138 | bfd_vma mask; |
3139 | asection *sec = h->root.u.def.section; | |
3140 | ||
de194d85 | 3141 | /* The section alignment of the definition is the maximum alignment |
91ac5911 L |
3142 | requirement of symbols defined in the section. Since we don't |
3143 | know the symbol alignment requirement, we start with the | |
3144 | maximum alignment and check low bits of the symbol address | |
3145 | for the minimum alignment. */ | |
fd361982 | 3146 | power_of_two = bfd_section_alignment (sec); |
91ac5911 L |
3147 | mask = ((bfd_vma) 1 << power_of_two) - 1; |
3148 | while ((h->root.u.def.value & mask) != 0) | |
3149 | { | |
3150 | mask >>= 1; | |
3151 | --power_of_two; | |
3152 | } | |
027297b7 | 3153 | |
fd361982 | 3154 | if (power_of_two > bfd_section_alignment (dynbss)) |
027297b7 L |
3155 | { |
3156 | /* Adjust the section alignment if needed. */ | |
fd361982 | 3157 | if (!bfd_set_section_alignment (dynbss, power_of_two)) |
0a1b45a2 | 3158 | return false; |
027297b7 L |
3159 | } |
3160 | ||
91ac5911 | 3161 | /* We make sure that the symbol will be aligned properly. */ |
027297b7 L |
3162 | dynbss->size = BFD_ALIGN (dynbss->size, mask + 1); |
3163 | ||
3164 | /* Define the symbol as being at this point in DYNBSS. */ | |
3165 | h->root.u.def.section = dynbss; | |
3166 | h->root.u.def.value = dynbss->size; | |
3167 | ||
3168 | /* Increment the size of DYNBSS to make room for the symbol. */ | |
3169 | dynbss->size += h->size; | |
3170 | ||
f7483970 L |
3171 | /* No error if extern_protected_data is true. */ |
3172 | if (h->protected_def | |
889c2a67 L |
3173 | && (!info->extern_protected_data |
3174 | || (info->extern_protected_data < 0 | |
3175 | && !get_elf_backend_data (dynbss->owner)->extern_protected_data))) | |
d07a1b05 | 3176 | info->callbacks->einfo |
c1c8c1ef | 3177 | (_("%P: copy reloc against protected `%pT' is dangerous\n"), |
d07a1b05 | 3178 | h->root.root.string); |
6cabe1ea | 3179 | |
0a1b45a2 | 3180 | return true; |
027297b7 L |
3181 | } |
3182 | ||
45d6a902 AM |
3183 | /* Adjust all external symbols pointing into SEC_MERGE sections |
3184 | to reflect the object merging within the sections. */ | |
3185 | ||
0a1b45a2 | 3186 | static bool |
268b6b39 | 3187 | _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry *h, void *data) |
45d6a902 AM |
3188 | { |
3189 | asection *sec; | |
3190 | ||
45d6a902 AM |
3191 | if ((h->root.type == bfd_link_hash_defined |
3192 | || h->root.type == bfd_link_hash_defweak) | |
3193 | && ((sec = h->root.u.def.section)->flags & SEC_MERGE) | |
dbaa2011 | 3194 | && sec->sec_info_type == SEC_INFO_TYPE_MERGE) |
45d6a902 | 3195 | { |
a50b1753 | 3196 | bfd *output_bfd = (bfd *) data; |
45d6a902 AM |
3197 | |
3198 | h->root.u.def.value = | |
3199 | _bfd_merged_section_offset (output_bfd, | |
3200 | &h->root.u.def.section, | |
3201 | elf_section_data (sec)->sec_info, | |
753731ee | 3202 | h->root.u.def.value); |
45d6a902 AM |
3203 | } |
3204 | ||
0a1b45a2 | 3205 | return true; |
45d6a902 | 3206 | } |
986a241f RH |
3207 | |
3208 | /* Returns false if the symbol referred to by H should be considered | |
3209 | to resolve local to the current module, and true if it should be | |
3210 | considered to bind dynamically. */ | |
3211 | ||
0a1b45a2 | 3212 | bool |
268b6b39 AM |
3213 | _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry *h, |
3214 | struct bfd_link_info *info, | |
0a1b45a2 | 3215 | bool not_local_protected) |
986a241f | 3216 | { |
0a1b45a2 | 3217 | bool binding_stays_local_p; |
fcb93ecf PB |
3218 | const struct elf_backend_data *bed; |
3219 | struct elf_link_hash_table *hash_table; | |
986a241f RH |
3220 | |
3221 | if (h == NULL) | |
0a1b45a2 | 3222 | return false; |
986a241f RH |
3223 | |
3224 | while (h->root.type == bfd_link_hash_indirect | |
3225 | || h->root.type == bfd_link_hash_warning) | |
3226 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3227 | ||
3228 | /* If it was forced local, then clearly it's not dynamic. */ | |
3229 | if (h->dynindx == -1) | |
0a1b45a2 | 3230 | return false; |
f5385ebf | 3231 | if (h->forced_local) |
0a1b45a2 | 3232 | return false; |
986a241f RH |
3233 | |
3234 | /* Identify the cases where name binding rules say that a | |
3235 | visible symbol resolves locally. */ | |
0e1862bb L |
3236 | binding_stays_local_p = (bfd_link_executable (info) |
3237 | || SYMBOLIC_BIND (info, h)); | |
986a241f RH |
3238 | |
3239 | switch (ELF_ST_VISIBILITY (h->other)) | |
3240 | { | |
3241 | case STV_INTERNAL: | |
3242 | case STV_HIDDEN: | |
0a1b45a2 | 3243 | return false; |
986a241f RH |
3244 | |
3245 | case STV_PROTECTED: | |
fcb93ecf | 3246 | hash_table = elf_hash_table (info); |
2cc15b10 | 3247 | if (!is_elf_hash_table (&hash_table->root)) |
0a1b45a2 | 3248 | return false; |
fcb93ecf PB |
3249 | |
3250 | bed = get_elf_backend_data (hash_table->dynobj); | |
3251 | ||
986a241f RH |
3252 | /* Proper resolution for function pointer equality may require |
3253 | that these symbols perhaps be resolved dynamically, even though | |
3254 | we should be resolving them to the current module. */ | |
89a2ee5a | 3255 | if (!not_local_protected || !bed->is_function_type (h->type)) |
0a1b45a2 | 3256 | binding_stays_local_p = true; |
986a241f RH |
3257 | break; |
3258 | ||
3259 | default: | |
986a241f RH |
3260 | break; |
3261 | } | |
3262 | ||
aa37626c | 3263 | /* If it isn't defined locally, then clearly it's dynamic. */ |
89a2ee5a | 3264 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
0a1b45a2 | 3265 | return true; |
aa37626c | 3266 | |
986a241f RH |
3267 | /* Otherwise, the symbol is dynamic if binding rules don't tell |
3268 | us that it remains local. */ | |
3269 | return !binding_stays_local_p; | |
3270 | } | |
f6c52c13 AM |
3271 | |
3272 | /* Return true if the symbol referred to by H should be considered | |
3273 | to resolve local to the current module, and false otherwise. Differs | |
3274 | from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of | |
2e76e85a | 3275 | undefined symbols. The two functions are virtually identical except |
0fad2956 MR |
3276 | for the place where dynindx == -1 is tested. If that test is true, |
3277 | _bfd_elf_dynamic_symbol_p will say the symbol is local, while | |
3278 | _bfd_elf_symbol_refs_local_p will say the symbol is local only for | |
3279 | defined symbols. | |
89a2ee5a AM |
3280 | It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as |
3281 | !_bfd_elf_symbol_refs_local_p, except that targets differ in their | |
3282 | treatment of undefined weak symbols. For those that do not make | |
3283 | undefined weak symbols dynamic, both functions may return false. */ | |
f6c52c13 | 3284 | |
0a1b45a2 | 3285 | bool |
268b6b39 AM |
3286 | _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry *h, |
3287 | struct bfd_link_info *info, | |
0a1b45a2 | 3288 | bool local_protected) |
f6c52c13 | 3289 | { |
fcb93ecf PB |
3290 | const struct elf_backend_data *bed; |
3291 | struct elf_link_hash_table *hash_table; | |
3292 | ||
f6c52c13 AM |
3293 | /* If it's a local sym, of course we resolve locally. */ |
3294 | if (h == NULL) | |
0a1b45a2 | 3295 | return true; |
f6c52c13 | 3296 | |
d95edcac L |
3297 | /* STV_HIDDEN or STV_INTERNAL ones must be local. */ |
3298 | if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
3299 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
0a1b45a2 | 3300 | return true; |
d95edcac | 3301 | |
0fad2956 MR |
3302 | /* Forced local symbols resolve locally. */ |
3303 | if (h->forced_local) | |
0a1b45a2 | 3304 | return true; |
0fad2956 | 3305 | |
7e2294f9 AO |
3306 | /* Common symbols that become definitions don't get the DEF_REGULAR |
3307 | flag set, so test it first, and don't bail out. */ | |
3308 | if (ELF_COMMON_DEF_P (h)) | |
3309 | /* Do nothing. */; | |
f6c52c13 | 3310 | /* If we don't have a definition in a regular file, then we can't |
49ff44d6 L |
3311 | resolve locally. The sym is either undefined or dynamic. */ |
3312 | else if (!h->def_regular) | |
0a1b45a2 | 3313 | return false; |
f6c52c13 | 3314 | |
0fad2956 | 3315 | /* Non-dynamic symbols resolve locally. */ |
f6c52c13 | 3316 | if (h->dynindx == -1) |
0a1b45a2 | 3317 | return true; |
f6c52c13 AM |
3318 | |
3319 | /* At this point, we know the symbol is defined and dynamic. In an | |
3320 | executable it must resolve locally, likewise when building symbolic | |
3321 | shared libraries. */ | |
0e1862bb | 3322 | if (bfd_link_executable (info) || SYMBOLIC_BIND (info, h)) |
0a1b45a2 | 3323 | return true; |
f6c52c13 AM |
3324 | |
3325 | /* Now deal with defined dynamic symbols in shared libraries. Ones | |
3326 | with default visibility might not resolve locally. */ | |
3327 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
0a1b45a2 | 3328 | return false; |
f6c52c13 | 3329 | |
fcb93ecf | 3330 | hash_table = elf_hash_table (info); |
2cc15b10 | 3331 | if (!is_elf_hash_table (&hash_table->root)) |
0a1b45a2 | 3332 | return true; |
fcb93ecf PB |
3333 | |
3334 | bed = get_elf_backend_data (hash_table->dynobj); | |
3335 | ||
f7483970 L |
3336 | /* If extern_protected_data is false, STV_PROTECTED non-function |
3337 | symbols are local. */ | |
889c2a67 L |
3338 | if ((!info->extern_protected_data |
3339 | || (info->extern_protected_data < 0 | |
3340 | && !bed->extern_protected_data)) | |
3341 | && !bed->is_function_type (h->type)) | |
0a1b45a2 | 3342 | return true; |
1c16dfa5 | 3343 | |
f6c52c13 | 3344 | /* Function pointer equality tests may require that STV_PROTECTED |
2676a7d9 AM |
3345 | symbols be treated as dynamic symbols. If the address of a |
3346 | function not defined in an executable is set to that function's | |
3347 | plt entry in the executable, then the address of the function in | |
3348 | a shared library must also be the plt entry in the executable. */ | |
f6c52c13 AM |
3349 | return local_protected; |
3350 | } | |
e1918d23 AM |
3351 | |
3352 | /* Caches some TLS segment info, and ensures that the TLS segment vma is | |
3353 | aligned. Returns the first TLS output section. */ | |
3354 | ||
3355 | struct bfd_section * | |
3356 | _bfd_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) | |
3357 | { | |
3358 | struct bfd_section *sec, *tls; | |
3359 | unsigned int align = 0; | |
3360 | ||
3361 | for (sec = obfd->sections; sec != NULL; sec = sec->next) | |
3362 | if ((sec->flags & SEC_THREAD_LOCAL) != 0) | |
3363 | break; | |
3364 | tls = sec; | |
3365 | ||
3366 | for (; sec != NULL && (sec->flags & SEC_THREAD_LOCAL) != 0; sec = sec->next) | |
3367 | if (sec->alignment_power > align) | |
3368 | align = sec->alignment_power; | |
3369 | ||
3370 | elf_hash_table (info)->tls_sec = tls; | |
3371 | ||
fdde2fb6 SH |
3372 | /* Ensure the alignment of the first section (usually .tdata) is the largest |
3373 | alignment, so that the tls segment starts aligned. */ | |
e1918d23 AM |
3374 | if (tls != NULL) |
3375 | tls->alignment_power = align; | |
3376 | ||
3377 | return tls; | |
3378 | } | |
0ad989f9 L |
3379 | |
3380 | /* Return TRUE iff this is a non-common, definition of a non-function symbol. */ | |
0a1b45a2 | 3381 | static bool |
0ad989f9 L |
3382 | is_global_data_symbol_definition (bfd *abfd ATTRIBUTE_UNUSED, |
3383 | Elf_Internal_Sym *sym) | |
3384 | { | |
a4d8e49b L |
3385 | const struct elf_backend_data *bed; |
3386 | ||
0ad989f9 L |
3387 | /* Local symbols do not count, but target specific ones might. */ |
3388 | if (ELF_ST_BIND (sym->st_info) != STB_GLOBAL | |
3389 | && ELF_ST_BIND (sym->st_info) < STB_LOOS) | |
0a1b45a2 | 3390 | return false; |
0ad989f9 | 3391 | |
fcb93ecf | 3392 | bed = get_elf_backend_data (abfd); |
0ad989f9 | 3393 | /* Function symbols do not count. */ |
fcb93ecf | 3394 | if (bed->is_function_type (ELF_ST_TYPE (sym->st_info))) |
0a1b45a2 | 3395 | return false; |
0ad989f9 L |
3396 | |
3397 | /* If the section is undefined, then so is the symbol. */ | |
3398 | if (sym->st_shndx == SHN_UNDEF) | |
0a1b45a2 | 3399 | return false; |
0ad989f9 L |
3400 | |
3401 | /* If the symbol is defined in the common section, then | |
3402 | it is a common definition and so does not count. */ | |
a4d8e49b | 3403 | if (bed->common_definition (sym)) |
0a1b45a2 | 3404 | return false; |
0ad989f9 L |
3405 | |
3406 | /* If the symbol is in a target specific section then we | |
3407 | must rely upon the backend to tell us what it is. */ | |
3408 | if (sym->st_shndx >= SHN_LORESERVE && sym->st_shndx < SHN_ABS) | |
3409 | /* FIXME - this function is not coded yet: | |
3410 | ||
3411 | return _bfd_is_global_symbol_definition (abfd, sym); | |
3412 | ||
3413 | Instead for now assume that the definition is not global, | |
3414 | Even if this is wrong, at least the linker will behave | |
3415 | in the same way that it used to do. */ | |
0a1b45a2 | 3416 | return false; |
0ad989f9 | 3417 | |
0a1b45a2 | 3418 | return true; |
0ad989f9 L |
3419 | } |
3420 | ||
3421 | /* Search the symbol table of the archive element of the archive ABFD | |
3422 | whose archive map contains a mention of SYMDEF, and determine if | |
3423 | the symbol is defined in this element. */ | |
0a1b45a2 | 3424 | static bool |
0ad989f9 L |
3425 | elf_link_is_defined_archive_symbol (bfd * abfd, carsym * symdef) |
3426 | { | |
3427 | Elf_Internal_Shdr * hdr; | |
ef53be89 AM |
3428 | size_t symcount; |
3429 | size_t extsymcount; | |
3430 | size_t extsymoff; | |
0ad989f9 L |
3431 | Elf_Internal_Sym *isymbuf; |
3432 | Elf_Internal_Sym *isym; | |
3433 | Elf_Internal_Sym *isymend; | |
0a1b45a2 | 3434 | bool result; |
0ad989f9 L |
3435 | |
3436 | abfd = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
3437 | if (abfd == NULL) | |
0a1b45a2 | 3438 | return false; |
0ad989f9 L |
3439 | |
3440 | if (! bfd_check_format (abfd, bfd_object)) | |
0a1b45a2 | 3441 | return false; |
0ad989f9 | 3442 | |
7dc3990e L |
3443 | /* Select the appropriate symbol table. If we don't know if the |
3444 | object file is an IR object, give linker LTO plugin a chance to | |
3445 | get the correct symbol table. */ | |
3446 | if (abfd->plugin_format == bfd_plugin_yes | |
08ce1d72 | 3447 | #if BFD_SUPPORTS_PLUGINS |
7dc3990e L |
3448 | || (abfd->plugin_format == bfd_plugin_unknown |
3449 | && bfd_link_plugin_object_p (abfd)) | |
3450 | #endif | |
3451 | ) | |
3452 | { | |
3453 | /* Use the IR symbol table if the object has been claimed by | |
3454 | plugin. */ | |
3455 | abfd = abfd->plugin_dummy_bfd; | |
3456 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
3457 | } | |
3458 | else if ((abfd->flags & DYNAMIC) == 0 || elf_dynsymtab (abfd) == 0) | |
0ad989f9 L |
3459 | hdr = &elf_tdata (abfd)->symtab_hdr; |
3460 | else | |
3461 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
3462 | ||
3463 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
3464 | ||
3465 | /* The sh_info field of the symtab header tells us where the | |
3466 | external symbols start. We don't care about the local symbols. */ | |
3467 | if (elf_bad_symtab (abfd)) | |
3468 | { | |
3469 | extsymcount = symcount; | |
3470 | extsymoff = 0; | |
3471 | } | |
3472 | else | |
3473 | { | |
3474 | extsymcount = symcount - hdr->sh_info; | |
3475 | extsymoff = hdr->sh_info; | |
3476 | } | |
3477 | ||
3478 | if (extsymcount == 0) | |
0a1b45a2 | 3479 | return false; |
0ad989f9 L |
3480 | |
3481 | /* Read in the symbol table. */ | |
3482 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
3483 | NULL, NULL, NULL); | |
3484 | if (isymbuf == NULL) | |
0a1b45a2 | 3485 | return false; |
0ad989f9 L |
3486 | |
3487 | /* Scan the symbol table looking for SYMDEF. */ | |
0a1b45a2 | 3488 | result = false; |
0ad989f9 L |
3489 | for (isym = isymbuf, isymend = isymbuf + extsymcount; isym < isymend; isym++) |
3490 | { | |
3491 | const char *name; | |
3492 | ||
3493 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
3494 | isym->st_name); | |
3495 | if (name == NULL) | |
3496 | break; | |
3497 | ||
3498 | if (strcmp (name, symdef->name) == 0) | |
3499 | { | |
3500 | result = is_global_data_symbol_definition (abfd, isym); | |
3501 | break; | |
3502 | } | |
3503 | } | |
3504 | ||
3505 | free (isymbuf); | |
3506 | ||
3507 | return result; | |
3508 | } | |
3509 | \f | |
5a580b3a AM |
3510 | /* Add an entry to the .dynamic table. */ |
3511 | ||
0a1b45a2 | 3512 | bool |
5a580b3a AM |
3513 | _bfd_elf_add_dynamic_entry (struct bfd_link_info *info, |
3514 | bfd_vma tag, | |
3515 | bfd_vma val) | |
3516 | { | |
3517 | struct elf_link_hash_table *hash_table; | |
3518 | const struct elf_backend_data *bed; | |
3519 | asection *s; | |
3520 | bfd_size_type newsize; | |
3521 | bfd_byte *newcontents; | |
3522 | Elf_Internal_Dyn dyn; | |
3523 | ||
3524 | hash_table = elf_hash_table (info); | |
2cc15b10 | 3525 | if (! is_elf_hash_table (&hash_table->root)) |
0a1b45a2 | 3526 | return false; |
5a580b3a | 3527 | |
7f923b7f | 3528 | if (tag == DT_RELA || tag == DT_REL) |
0a1b45a2 | 3529 | hash_table->dynamic_relocs = true; |
7f923b7f | 3530 | |
5a580b3a | 3531 | bed = get_elf_backend_data (hash_table->dynobj); |
3d4d4302 | 3532 | s = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
5a580b3a AM |
3533 | BFD_ASSERT (s != NULL); |
3534 | ||
eea6121a | 3535 | newsize = s->size + bed->s->sizeof_dyn; |
a50b1753 | 3536 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); |
5a580b3a | 3537 | if (newcontents == NULL) |
0a1b45a2 | 3538 | return false; |
5a580b3a AM |
3539 | |
3540 | dyn.d_tag = tag; | |
3541 | dyn.d_un.d_val = val; | |
eea6121a | 3542 | bed->s->swap_dyn_out (hash_table->dynobj, &dyn, newcontents + s->size); |
5a580b3a | 3543 | |
eea6121a | 3544 | s->size = newsize; |
5a580b3a AM |
3545 | s->contents = newcontents; |
3546 | ||
0a1b45a2 | 3547 | return true; |
5a580b3a AM |
3548 | } |
3549 | ||
6f6fd151 L |
3550 | /* Strip zero-sized dynamic sections. */ |
3551 | ||
0a1b45a2 | 3552 | bool |
6f6fd151 L |
3553 | _bfd_elf_strip_zero_sized_dynamic_sections (struct bfd_link_info *info) |
3554 | { | |
3555 | struct elf_link_hash_table *hash_table; | |
3556 | const struct elf_backend_data *bed; | |
3557 | asection *s, *sdynamic, **pp; | |
3558 | asection *rela_dyn, *rel_dyn; | |
3559 | Elf_Internal_Dyn dyn; | |
3560 | bfd_byte *extdyn, *next; | |
3561 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
0a1b45a2 AM |
3562 | bool strip_zero_sized; |
3563 | bool strip_zero_sized_plt; | |
6f6fd151 L |
3564 | |
3565 | if (bfd_link_relocatable (info)) | |
0a1b45a2 | 3566 | return true; |
6f6fd151 L |
3567 | |
3568 | hash_table = elf_hash_table (info); | |
2cc15b10 | 3569 | if (!is_elf_hash_table (&hash_table->root)) |
0a1b45a2 | 3570 | return false; |
6f6fd151 L |
3571 | |
3572 | if (!hash_table->dynobj) | |
0a1b45a2 | 3573 | return true; |
6f6fd151 L |
3574 | |
3575 | sdynamic= bfd_get_linker_section (hash_table->dynobj, ".dynamic"); | |
3576 | if (!sdynamic) | |
0a1b45a2 | 3577 | return true; |
6f6fd151 L |
3578 | |
3579 | bed = get_elf_backend_data (hash_table->dynobj); | |
3580 | swap_dyn_in = bed->s->swap_dyn_in; | |
3581 | ||
0a1b45a2 AM |
3582 | strip_zero_sized = false; |
3583 | strip_zero_sized_plt = false; | |
6f6fd151 L |
3584 | |
3585 | /* Strip zero-sized dynamic sections. */ | |
3586 | rela_dyn = bfd_get_section_by_name (info->output_bfd, ".rela.dyn"); | |
3587 | rel_dyn = bfd_get_section_by_name (info->output_bfd, ".rel.dyn"); | |
3588 | for (pp = &info->output_bfd->sections; (s = *pp) != NULL;) | |
3589 | if (s->size == 0 | |
3590 | && (s == rela_dyn | |
3591 | || s == rel_dyn | |
3592 | || s == hash_table->srelplt->output_section | |
3593 | || s == hash_table->splt->output_section)) | |
3594 | { | |
3595 | *pp = s->next; | |
3596 | info->output_bfd->section_count--; | |
0a1b45a2 | 3597 | strip_zero_sized = true; |
6f6fd151 L |
3598 | if (s == rela_dyn) |
3599 | s = rela_dyn; | |
3600 | if (s == rel_dyn) | |
3601 | s = rel_dyn; | |
3602 | else if (s == hash_table->splt->output_section) | |
3603 | { | |
3604 | s = hash_table->splt; | |
0a1b45a2 | 3605 | strip_zero_sized_plt = true; |
6f6fd151 L |
3606 | } |
3607 | else | |
3608 | s = hash_table->srelplt; | |
3609 | s->flags |= SEC_EXCLUDE; | |
3610 | s->output_section = bfd_abs_section_ptr; | |
3611 | } | |
3612 | else | |
3613 | pp = &s->next; | |
3614 | ||
3615 | if (strip_zero_sized_plt) | |
3616 | for (extdyn = sdynamic->contents; | |
3617 | extdyn < sdynamic->contents + sdynamic->size; | |
3618 | extdyn = next) | |
3619 | { | |
3620 | next = extdyn + bed->s->sizeof_dyn; | |
3621 | swap_dyn_in (hash_table->dynobj, extdyn, &dyn); | |
3622 | switch (dyn.d_tag) | |
3623 | { | |
3624 | default: | |
3625 | break; | |
3626 | case DT_JMPREL: | |
3627 | case DT_PLTRELSZ: | |
3628 | case DT_PLTREL: | |
3629 | /* Strip DT_PLTRELSZ, DT_JMPREL and DT_PLTREL entries if | |
3630 | the procedure linkage table (the .plt section) has been | |
3631 | removed. */ | |
3632 | memmove (extdyn, next, | |
3633 | sdynamic->size - (next - sdynamic->contents)); | |
3634 | next = extdyn; | |
3635 | } | |
3636 | } | |
3637 | ||
3638 | if (strip_zero_sized) | |
3639 | { | |
3640 | /* Regenerate program headers. */ | |
3641 | elf_seg_map (info->output_bfd) = NULL; | |
3642 | return _bfd_elf_map_sections_to_segments (info->output_bfd, info); | |
3643 | } | |
3644 | ||
0a1b45a2 | 3645 | return true; |
6f6fd151 L |
3646 | } |
3647 | ||
e310298c | 3648 | /* Add a DT_NEEDED entry for this dynamic object. Returns -1 on error, |
5a580b3a AM |
3649 | 1 if a DT_NEEDED tag already exists, and 0 on success. */ |
3650 | ||
e310298c AM |
3651 | int |
3652 | bfd_elf_add_dt_needed_tag (bfd *abfd, struct bfd_link_info *info) | |
5a580b3a AM |
3653 | { |
3654 | struct elf_link_hash_table *hash_table; | |
ef53be89 | 3655 | size_t strindex; |
e310298c | 3656 | const char *soname; |
5a580b3a | 3657 | |
7e9f0867 AM |
3658 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
3659 | return -1; | |
3660 | ||
5a580b3a | 3661 | hash_table = elf_hash_table (info); |
e310298c | 3662 | soname = elf_dt_name (abfd); |
0a1b45a2 | 3663 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, soname, false); |
ef53be89 | 3664 | if (strindex == (size_t) -1) |
5a580b3a AM |
3665 | return -1; |
3666 | ||
02be4619 | 3667 | if (_bfd_elf_strtab_refcount (hash_table->dynstr, strindex) != 1) |
5a580b3a AM |
3668 | { |
3669 | asection *sdyn; | |
3670 | const struct elf_backend_data *bed; | |
3671 | bfd_byte *extdyn; | |
3672 | ||
3673 | bed = get_elf_backend_data (hash_table->dynobj); | |
3d4d4302 | 3674 | sdyn = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
7e9f0867 AM |
3675 | if (sdyn != NULL) |
3676 | for (extdyn = sdyn->contents; | |
3677 | extdyn < sdyn->contents + sdyn->size; | |
3678 | extdyn += bed->s->sizeof_dyn) | |
3679 | { | |
3680 | Elf_Internal_Dyn dyn; | |
5a580b3a | 3681 | |
7e9f0867 AM |
3682 | bed->s->swap_dyn_in (hash_table->dynobj, extdyn, &dyn); |
3683 | if (dyn.d_tag == DT_NEEDED | |
3684 | && dyn.d_un.d_val == strindex) | |
3685 | { | |
3686 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3687 | return 1; | |
3688 | } | |
3689 | } | |
5a580b3a AM |
3690 | } |
3691 | ||
e310298c AM |
3692 | if (!_bfd_elf_link_create_dynamic_sections (hash_table->dynobj, info)) |
3693 | return -1; | |
7e9f0867 | 3694 | |
e310298c AM |
3695 | if (!_bfd_elf_add_dynamic_entry (info, DT_NEEDED, strindex)) |
3696 | return -1; | |
5a580b3a AM |
3697 | |
3698 | return 0; | |
3699 | } | |
3700 | ||
7b15fa7a AM |
3701 | /* Return true if SONAME is on the needed list between NEEDED and STOP |
3702 | (or the end of list if STOP is NULL), and needed by a library that | |
3703 | will be loaded. */ | |
3704 | ||
0a1b45a2 | 3705 | static bool |
7b15fa7a AM |
3706 | on_needed_list (const char *soname, |
3707 | struct bfd_link_needed_list *needed, | |
3708 | struct bfd_link_needed_list *stop) | |
010e5ae2 | 3709 | { |
7b15fa7a AM |
3710 | struct bfd_link_needed_list *look; |
3711 | for (look = needed; look != stop; look = look->next) | |
3712 | if (strcmp (soname, look->name) == 0 | |
3713 | && ((elf_dyn_lib_class (look->by) & DYN_AS_NEEDED) == 0 | |
3714 | /* If needed by a library that itself is not directly | |
3715 | needed, recursively check whether that library is | |
3716 | indirectly needed. Since we add DT_NEEDED entries to | |
3717 | the end of the list, library dependencies appear after | |
3718 | the library. Therefore search prior to the current | |
3719 | LOOK, preventing possible infinite recursion. */ | |
3720 | || on_needed_list (elf_dt_name (look->by), needed, look))) | |
0a1b45a2 | 3721 | return true; |
010e5ae2 | 3722 | |
0a1b45a2 | 3723 | return false; |
010e5ae2 AM |
3724 | } |
3725 | ||
3a3f4bf7 | 3726 | /* Sort symbol by value, section, size, and type. */ |
4ad4eba5 AM |
3727 | static int |
3728 | elf_sort_symbol (const void *arg1, const void *arg2) | |
5a580b3a AM |
3729 | { |
3730 | const struct elf_link_hash_entry *h1; | |
3731 | const struct elf_link_hash_entry *h2; | |
10b7e05b | 3732 | bfd_signed_vma vdiff; |
3a3f4bf7 AM |
3733 | int sdiff; |
3734 | const char *n1; | |
3735 | const char *n2; | |
5a580b3a AM |
3736 | |
3737 | h1 = *(const struct elf_link_hash_entry **) arg1; | |
3738 | h2 = *(const struct elf_link_hash_entry **) arg2; | |
10b7e05b NC |
3739 | vdiff = h1->root.u.def.value - h2->root.u.def.value; |
3740 | if (vdiff != 0) | |
3741 | return vdiff > 0 ? 1 : -1; | |
3a3f4bf7 AM |
3742 | |
3743 | sdiff = h1->root.u.def.section->id - h2->root.u.def.section->id; | |
3744 | if (sdiff != 0) | |
3745 | return sdiff; | |
3746 | ||
3747 | /* Sort so that sized symbols are selected over zero size symbols. */ | |
3748 | vdiff = h1->size - h2->size; | |
3749 | if (vdiff != 0) | |
3750 | return vdiff > 0 ? 1 : -1; | |
3751 | ||
3752 | /* Sort so that STT_OBJECT is selected over STT_NOTYPE. */ | |
3753 | if (h1->type != h2->type) | |
3754 | return h1->type - h2->type; | |
3755 | ||
3756 | /* If symbols are properly sized and typed, and multiple strong | |
3757 | aliases are not defined in a shared library by the user we | |
3758 | shouldn't get here. Unfortunately linker script symbols like | |
3759 | __bss_start sometimes match a user symbol defined at the start of | |
3760 | .bss without proper size and type. We'd like to preference the | |
3761 | user symbol over reserved system symbols. Sort on leading | |
3762 | underscores. */ | |
3763 | n1 = h1->root.root.string; | |
3764 | n2 = h2->root.root.string; | |
3765 | while (*n1 == *n2) | |
10b7e05b | 3766 | { |
3a3f4bf7 AM |
3767 | if (*n1 == 0) |
3768 | break; | |
3769 | ++n1; | |
3770 | ++n2; | |
10b7e05b | 3771 | } |
3a3f4bf7 AM |
3772 | if (*n1 == '_') |
3773 | return -1; | |
3774 | if (*n2 == '_') | |
3775 | return 1; | |
3776 | ||
3777 | /* Final sort on name selects user symbols like '_u' over reserved | |
3778 | system symbols like '_Z' and also will avoid qsort instability. */ | |
3779 | return *n1 - *n2; | |
5a580b3a | 3780 | } |
4ad4eba5 | 3781 | |
5a580b3a AM |
3782 | /* This function is used to adjust offsets into .dynstr for |
3783 | dynamic symbols. This is called via elf_link_hash_traverse. */ | |
3784 | ||
0a1b45a2 | 3785 | static bool |
5a580b3a AM |
3786 | elf_adjust_dynstr_offsets (struct elf_link_hash_entry *h, void *data) |
3787 | { | |
a50b1753 | 3788 | struct elf_strtab_hash *dynstr = (struct elf_strtab_hash *) data; |
5a580b3a | 3789 | |
5a580b3a AM |
3790 | if (h->dynindx != -1) |
3791 | h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index); | |
0a1b45a2 | 3792 | return true; |
5a580b3a AM |
3793 | } |
3794 | ||
3795 | /* Assign string offsets in .dynstr, update all structures referencing | |
3796 | them. */ | |
3797 | ||
0a1b45a2 | 3798 | static bool |
4ad4eba5 | 3799 | elf_finalize_dynstr (bfd *output_bfd, struct bfd_link_info *info) |
5a580b3a AM |
3800 | { |
3801 | struct elf_link_hash_table *hash_table = elf_hash_table (info); | |
3802 | struct elf_link_local_dynamic_entry *entry; | |
3803 | struct elf_strtab_hash *dynstr = hash_table->dynstr; | |
3804 | bfd *dynobj = hash_table->dynobj; | |
3805 | asection *sdyn; | |
3806 | bfd_size_type size; | |
3807 | const struct elf_backend_data *bed; | |
3808 | bfd_byte *extdyn; | |
3809 | ||
3810 | _bfd_elf_strtab_finalize (dynstr); | |
3811 | size = _bfd_elf_strtab_size (dynstr); | |
3812 | ||
3d16b64e NA |
3813 | /* Allow the linker to examine the dynsymtab now it's fully populated. */ |
3814 | ||
3815 | if (info->callbacks->examine_strtab) | |
3816 | info->callbacks->examine_strtab (dynstr); | |
3817 | ||
5a580b3a | 3818 | bed = get_elf_backend_data (dynobj); |
3d4d4302 | 3819 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
5a580b3a AM |
3820 | BFD_ASSERT (sdyn != NULL); |
3821 | ||
3822 | /* Update all .dynamic entries referencing .dynstr strings. */ | |
3823 | for (extdyn = sdyn->contents; | |
eea6121a | 3824 | extdyn < sdyn->contents + sdyn->size; |
5a580b3a AM |
3825 | extdyn += bed->s->sizeof_dyn) |
3826 | { | |
3827 | Elf_Internal_Dyn dyn; | |
3828 | ||
3829 | bed->s->swap_dyn_in (dynobj, extdyn, &dyn); | |
3830 | switch (dyn.d_tag) | |
3831 | { | |
3832 | case DT_STRSZ: | |
3833 | dyn.d_un.d_val = size; | |
3834 | break; | |
3835 | case DT_NEEDED: | |
3836 | case DT_SONAME: | |
3837 | case DT_RPATH: | |
3838 | case DT_RUNPATH: | |
3839 | case DT_FILTER: | |
3840 | case DT_AUXILIARY: | |
7ee314fa AM |
3841 | case DT_AUDIT: |
3842 | case DT_DEPAUDIT: | |
5a580b3a AM |
3843 | dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val); |
3844 | break; | |
3845 | default: | |
3846 | continue; | |
3847 | } | |
3848 | bed->s->swap_dyn_out (dynobj, &dyn, extdyn); | |
3849 | } | |
3850 | ||
3851 | /* Now update local dynamic symbols. */ | |
3852 | for (entry = hash_table->dynlocal; entry ; entry = entry->next) | |
3853 | entry->isym.st_name = _bfd_elf_strtab_offset (dynstr, | |
3854 | entry->isym.st_name); | |
3855 | ||
3856 | /* And the rest of dynamic symbols. */ | |
3857 | elf_link_hash_traverse (hash_table, elf_adjust_dynstr_offsets, dynstr); | |
3858 | ||
3859 | /* Adjust version definitions. */ | |
3860 | if (elf_tdata (output_bfd)->cverdefs) | |
3861 | { | |
3862 | asection *s; | |
3863 | bfd_byte *p; | |
ef53be89 | 3864 | size_t i; |
5a580b3a AM |
3865 | Elf_Internal_Verdef def; |
3866 | Elf_Internal_Verdaux defaux; | |
3867 | ||
3d4d4302 | 3868 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); |
5a580b3a AM |
3869 | p = s->contents; |
3870 | do | |
3871 | { | |
3872 | _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p, | |
3873 | &def); | |
3874 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
3875 | if (def.vd_aux != sizeof (Elf_External_Verdef)) |
3876 | continue; | |
5a580b3a AM |
3877 | for (i = 0; i < def.vd_cnt; ++i) |
3878 | { | |
3879 | _bfd_elf_swap_verdaux_in (output_bfd, | |
3880 | (Elf_External_Verdaux *) p, &defaux); | |
3881 | defaux.vda_name = _bfd_elf_strtab_offset (dynstr, | |
3882 | defaux.vda_name); | |
3883 | _bfd_elf_swap_verdaux_out (output_bfd, | |
3884 | &defaux, (Elf_External_Verdaux *) p); | |
3885 | p += sizeof (Elf_External_Verdaux); | |
3886 | } | |
3887 | } | |
3888 | while (def.vd_next); | |
3889 | } | |
3890 | ||
3891 | /* Adjust version references. */ | |
3892 | if (elf_tdata (output_bfd)->verref) | |
3893 | { | |
3894 | asection *s; | |
3895 | bfd_byte *p; | |
ef53be89 | 3896 | size_t i; |
5a580b3a AM |
3897 | Elf_Internal_Verneed need; |
3898 | Elf_Internal_Vernaux needaux; | |
3899 | ||
3d4d4302 | 3900 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); |
5a580b3a AM |
3901 | p = s->contents; |
3902 | do | |
3903 | { | |
3904 | _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p, | |
3905 | &need); | |
3906 | need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file); | |
3907 | _bfd_elf_swap_verneed_out (output_bfd, &need, | |
3908 | (Elf_External_Verneed *) p); | |
3909 | p += sizeof (Elf_External_Verneed); | |
3910 | for (i = 0; i < need.vn_cnt; ++i) | |
3911 | { | |
3912 | _bfd_elf_swap_vernaux_in (output_bfd, | |
3913 | (Elf_External_Vernaux *) p, &needaux); | |
3914 | needaux.vna_name = _bfd_elf_strtab_offset (dynstr, | |
3915 | needaux.vna_name); | |
3916 | _bfd_elf_swap_vernaux_out (output_bfd, | |
3917 | &needaux, | |
3918 | (Elf_External_Vernaux *) p); | |
3919 | p += sizeof (Elf_External_Vernaux); | |
3920 | } | |
3921 | } | |
3922 | while (need.vn_next); | |
3923 | } | |
3924 | ||
0a1b45a2 | 3925 | return true; |
5a580b3a AM |
3926 | } |
3927 | \f | |
13285a1b AM |
3928 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. |
3929 | The default is to only match when the INPUT and OUTPUT are exactly | |
3930 | the same target. */ | |
3931 | ||
0a1b45a2 | 3932 | bool |
13285a1b AM |
3933 | _bfd_elf_default_relocs_compatible (const bfd_target *input, |
3934 | const bfd_target *output) | |
3935 | { | |
3936 | return input == output; | |
3937 | } | |
3938 | ||
3939 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. | |
3940 | This version is used when different targets for the same architecture | |
3941 | are virtually identical. */ | |
3942 | ||
0a1b45a2 | 3943 | bool |
13285a1b AM |
3944 | _bfd_elf_relocs_compatible (const bfd_target *input, |
3945 | const bfd_target *output) | |
3946 | { | |
3947 | const struct elf_backend_data *obed, *ibed; | |
3948 | ||
3949 | if (input == output) | |
0a1b45a2 | 3950 | return true; |
13285a1b AM |
3951 | |
3952 | ibed = xvec_get_elf_backend_data (input); | |
3953 | obed = xvec_get_elf_backend_data (output); | |
3954 | ||
3955 | if (ibed->arch != obed->arch) | |
0a1b45a2 | 3956 | return false; |
13285a1b AM |
3957 | |
3958 | /* If both backends are using this function, deem them compatible. */ | |
3959 | return ibed->relocs_compatible == obed->relocs_compatible; | |
3960 | } | |
3961 | ||
e5034e59 AM |
3962 | /* Make a special call to the linker "notice" function to tell it that |
3963 | we are about to handle an as-needed lib, or have finished | |
1b786873 | 3964 | processing the lib. */ |
e5034e59 | 3965 | |
0a1b45a2 | 3966 | bool |
e5034e59 AM |
3967 | _bfd_elf_notice_as_needed (bfd *ibfd, |
3968 | struct bfd_link_info *info, | |
3969 | enum notice_asneeded_action act) | |
3970 | { | |
46135103 | 3971 | return (*info->callbacks->notice) (info, NULL, NULL, ibfd, NULL, act, 0); |
e5034e59 AM |
3972 | } |
3973 | ||
d9689752 L |
3974 | /* Check relocations an ELF object file. */ |
3975 | ||
0a1b45a2 | 3976 | bool |
d9689752 L |
3977 | _bfd_elf_link_check_relocs (bfd *abfd, struct bfd_link_info *info) |
3978 | { | |
3979 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3980 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
3981 | ||
3982 | /* If this object is the same format as the output object, and it is | |
3983 | not a shared library, then let the backend look through the | |
3984 | relocs. | |
3985 | ||
3986 | This is required to build global offset table entries and to | |
3987 | arrange for dynamic relocs. It is not required for the | |
3988 | particular common case of linking non PIC code, even when linking | |
3989 | against shared libraries, but unfortunately there is no way of | |
3990 | knowing whether an object file has been compiled PIC or not. | |
3991 | Looking through the relocs is not particularly time consuming. | |
3992 | The problem is that we must either (1) keep the relocs in memory, | |
3993 | which causes the linker to require additional runtime memory or | |
3994 | (2) read the relocs twice from the input file, which wastes time. | |
3995 | This would be a good case for using mmap. | |
3996 | ||
3997 | I have no idea how to handle linking PIC code into a file of a | |
3998 | different format. It probably can't be done. */ | |
3999 | if ((abfd->flags & DYNAMIC) == 0 | |
2cc15b10 | 4000 | && is_elf_hash_table (&htab->root) |
d9689752 L |
4001 | && bed->check_relocs != NULL |
4002 | && elf_object_id (abfd) == elf_hash_table_id (htab) | |
4003 | && (*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) | |
4004 | { | |
4005 | asection *o; | |
4006 | ||
4007 | for (o = abfd->sections; o != NULL; o = o->next) | |
4008 | { | |
4009 | Elf_Internal_Rela *internal_relocs; | |
0a1b45a2 | 4010 | bool ok; |
d9689752 | 4011 | |
c4b126b8 L |
4012 | /* Don't check relocations in excluded sections. Don't do |
4013 | anything special with non-loaded, non-alloced sections. | |
4014 | In particular, any relocs in such sections should not | |
4015 | affect GOT and PLT reference counting (ie. we don't | |
4016 | allow them to create GOT or PLT entries), there's no | |
4017 | possibility or desire to optimize TLS relocs, and | |
4018 | there's not much point in propagating relocs to shared | |
4019 | libs that the dynamic linker won't relocate. */ | |
4020 | if ((o->flags & SEC_ALLOC) == 0 | |
4021 | || (o->flags & SEC_RELOC) == 0 | |
5ce03cea | 4022 | || (o->flags & SEC_EXCLUDE) != 0 |
d9689752 L |
4023 | || o->reloc_count == 0 |
4024 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
4025 | && (o->flags & SEC_DEBUGGING) != 0) | |
4026 | || bfd_is_abs_section (o->output_section)) | |
4027 | continue; | |
4028 | ||
4029 | internal_relocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, | |
4030 | info->keep_memory); | |
4031 | if (internal_relocs == NULL) | |
0a1b45a2 | 4032 | return false; |
d9689752 L |
4033 | |
4034 | ok = (*bed->check_relocs) (abfd, info, o, internal_relocs); | |
4035 | ||
4036 | if (elf_section_data (o)->relocs != internal_relocs) | |
4037 | free (internal_relocs); | |
4038 | ||
4039 | if (! ok) | |
0a1b45a2 | 4040 | return false; |
d9689752 L |
4041 | } |
4042 | } | |
4043 | ||
0a1b45a2 | 4044 | return true; |
d9689752 L |
4045 | } |
4046 | ||
4ad4eba5 AM |
4047 | /* Add symbols from an ELF object file to the linker hash table. */ |
4048 | ||
0a1b45a2 | 4049 | static bool |
4ad4eba5 AM |
4050 | elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) |
4051 | { | |
a0c402a5 | 4052 | Elf_Internal_Ehdr *ehdr; |
4ad4eba5 | 4053 | Elf_Internal_Shdr *hdr; |
ef53be89 AM |
4054 | size_t symcount; |
4055 | size_t extsymcount; | |
4056 | size_t extsymoff; | |
4ad4eba5 | 4057 | struct elf_link_hash_entry **sym_hash; |
0a1b45a2 | 4058 | bool dynamic; |
4ad4eba5 | 4059 | Elf_External_Versym *extversym = NULL; |
be22c732 | 4060 | Elf_External_Versym *extversym_end = NULL; |
4ad4eba5 AM |
4061 | Elf_External_Versym *ever; |
4062 | struct elf_link_hash_entry *weaks; | |
4063 | struct elf_link_hash_entry **nondeflt_vers = NULL; | |
ef53be89 | 4064 | size_t nondeflt_vers_cnt = 0; |
4ad4eba5 AM |
4065 | Elf_Internal_Sym *isymbuf = NULL; |
4066 | Elf_Internal_Sym *isym; | |
4067 | Elf_Internal_Sym *isymend; | |
4068 | const struct elf_backend_data *bed; | |
0a1b45a2 | 4069 | bool add_needed; |
66eb6687 | 4070 | struct elf_link_hash_table *htab; |
66eb6687 | 4071 | void *alloc_mark = NULL; |
4f87808c AM |
4072 | struct bfd_hash_entry **old_table = NULL; |
4073 | unsigned int old_size = 0; | |
4074 | unsigned int old_count = 0; | |
66eb6687 | 4075 | void *old_tab = NULL; |
66eb6687 AM |
4076 | void *old_ent; |
4077 | struct bfd_link_hash_entry *old_undefs = NULL; | |
4078 | struct bfd_link_hash_entry *old_undefs_tail = NULL; | |
5b677558 | 4079 | void *old_strtab = NULL; |
66eb6687 | 4080 | size_t tabsize = 0; |
db6a5d5f | 4081 | asection *s; |
0a1b45a2 | 4082 | bool just_syms; |
4ad4eba5 | 4083 | |
66eb6687 | 4084 | htab = elf_hash_table (info); |
4ad4eba5 | 4085 | bed = get_elf_backend_data (abfd); |
4ad4eba5 AM |
4086 | |
4087 | if ((abfd->flags & DYNAMIC) == 0) | |
0a1b45a2 | 4088 | dynamic = false; |
4ad4eba5 AM |
4089 | else |
4090 | { | |
0a1b45a2 | 4091 | dynamic = true; |
4ad4eba5 AM |
4092 | |
4093 | /* You can't use -r against a dynamic object. Also, there's no | |
4094 | hope of using a dynamic object which does not exactly match | |
4095 | the format of the output file. */ | |
0e1862bb | 4096 | if (bfd_link_relocatable (info) |
2cc15b10 | 4097 | || !is_elf_hash_table (&htab->root) |
f13a99db | 4098 | || info->output_bfd->xvec != abfd->xvec) |
4ad4eba5 | 4099 | { |
0e1862bb | 4100 | if (bfd_link_relocatable (info)) |
9a0789ec NC |
4101 | bfd_set_error (bfd_error_invalid_operation); |
4102 | else | |
4103 | bfd_set_error (bfd_error_wrong_format); | |
4ad4eba5 AM |
4104 | goto error_return; |
4105 | } | |
4106 | } | |
4107 | ||
a0c402a5 L |
4108 | ehdr = elf_elfheader (abfd); |
4109 | if (info->warn_alternate_em | |
4110 | && bed->elf_machine_code != ehdr->e_machine | |
4111 | && ((bed->elf_machine_alt1 != 0 | |
4112 | && ehdr->e_machine == bed->elf_machine_alt1) | |
4113 | || (bed->elf_machine_alt2 != 0 | |
4114 | && ehdr->e_machine == bed->elf_machine_alt2))) | |
9793eb77 | 4115 | _bfd_error_handler |
695344c0 | 4116 | /* xgettext:c-format */ |
9793eb77 | 4117 | (_("alternate ELF machine code found (%d) in %pB, expecting %d"), |
a0c402a5 L |
4118 | ehdr->e_machine, abfd, bed->elf_machine_code); |
4119 | ||
4ad4eba5 AM |
4120 | /* As a GNU extension, any input sections which are named |
4121 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
4122 | symbol. This differs from .gnu.warning sections, which generate | |
4123 | warnings when they are included in an output file. */ | |
dd98f8d2 | 4124 | /* PR 12761: Also generate this warning when building shared libraries. */ |
db6a5d5f | 4125 | for (s = abfd->sections; s != NULL; s = s->next) |
4ad4eba5 | 4126 | { |
db6a5d5f | 4127 | const char *name; |
4ad4eba5 | 4128 | |
fd361982 | 4129 | name = bfd_section_name (s); |
08dedd66 | 4130 | if (startswith (name, ".gnu.warning.")) |
4ad4eba5 | 4131 | { |
db6a5d5f AM |
4132 | char *msg; |
4133 | bfd_size_type sz; | |
4134 | ||
4135 | name += sizeof ".gnu.warning." - 1; | |
4136 | ||
4137 | /* If this is a shared object, then look up the symbol | |
4138 | in the hash table. If it is there, and it is already | |
4139 | been defined, then we will not be using the entry | |
4140 | from this shared object, so we don't need to warn. | |
4141 | FIXME: If we see the definition in a regular object | |
4142 | later on, we will warn, but we shouldn't. The only | |
4143 | fix is to keep track of what warnings we are supposed | |
4144 | to emit, and then handle them all at the end of the | |
4145 | link. */ | |
4146 | if (dynamic) | |
4ad4eba5 | 4147 | { |
db6a5d5f AM |
4148 | struct elf_link_hash_entry *h; |
4149 | ||
0a1b45a2 | 4150 | h = elf_link_hash_lookup (htab, name, false, false, true); |
db6a5d5f AM |
4151 | |
4152 | /* FIXME: What about bfd_link_hash_common? */ | |
4153 | if (h != NULL | |
4154 | && (h->root.type == bfd_link_hash_defined | |
4155 | || h->root.type == bfd_link_hash_defweak)) | |
4156 | continue; | |
4157 | } | |
4ad4eba5 | 4158 | |
db6a5d5f AM |
4159 | sz = s->size; |
4160 | msg = (char *) bfd_alloc (abfd, sz + 1); | |
4161 | if (msg == NULL) | |
4162 | goto error_return; | |
4ad4eba5 | 4163 | |
db6a5d5f AM |
4164 | if (! bfd_get_section_contents (abfd, s, msg, 0, sz)) |
4165 | goto error_return; | |
4ad4eba5 | 4166 | |
db6a5d5f | 4167 | msg[sz] = '\0'; |
4ad4eba5 | 4168 | |
db6a5d5f AM |
4169 | if (! (_bfd_generic_link_add_one_symbol |
4170 | (info, abfd, name, BSF_WARNING, s, 0, msg, | |
0a1b45a2 | 4171 | false, bed->collect, NULL))) |
db6a5d5f | 4172 | goto error_return; |
4ad4eba5 | 4173 | |
0e1862bb | 4174 | if (bfd_link_executable (info)) |
db6a5d5f AM |
4175 | { |
4176 | /* Clobber the section size so that the warning does | |
4177 | not get copied into the output file. */ | |
4178 | s->size = 0; | |
11d2f718 | 4179 | |
db6a5d5f AM |
4180 | /* Also set SEC_EXCLUDE, so that symbols defined in |
4181 | the warning section don't get copied to the output. */ | |
4182 | s->flags |= SEC_EXCLUDE; | |
4ad4eba5 AM |
4183 | } |
4184 | } | |
4185 | } | |
4186 | ||
29a9f53e L |
4187 | just_syms = ((s = abfd->sections) != NULL |
4188 | && s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS); | |
4189 | ||
0a1b45a2 | 4190 | add_needed = true; |
4ad4eba5 AM |
4191 | if (! dynamic) |
4192 | { | |
4193 | /* If we are creating a shared library, create all the dynamic | |
4194 | sections immediately. We need to attach them to something, | |
4195 | so we attach them to this BFD, provided it is the right | |
bf89386a L |
4196 | format and is not from ld --just-symbols. Always create the |
4197 | dynamic sections for -E/--dynamic-list. FIXME: If there | |
29a9f53e L |
4198 | are no input BFD's of the same format as the output, we can't |
4199 | make a shared library. */ | |
4200 | if (!just_syms | |
bf89386a | 4201 | && (bfd_link_pic (info) |
9c1d7a08 | 4202 | || (!bfd_link_relocatable (info) |
3c5fce9b | 4203 | && info->nointerp |
9c1d7a08 | 4204 | && (info->export_dynamic || info->dynamic))) |
2cc15b10 | 4205 | && is_elf_hash_table (&htab->root) |
f13a99db | 4206 | && info->output_bfd->xvec == abfd->xvec |
66eb6687 | 4207 | && !htab->dynamic_sections_created) |
4ad4eba5 AM |
4208 | { |
4209 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
4210 | goto error_return; | |
4211 | } | |
4212 | } | |
2cc15b10 | 4213 | else if (!is_elf_hash_table (&htab->root)) |
4ad4eba5 AM |
4214 | goto error_return; |
4215 | else | |
4216 | { | |
4ad4eba5 | 4217 | const char *soname = NULL; |
7ee314fa | 4218 | char *audit = NULL; |
4ad4eba5 | 4219 | struct bfd_link_needed_list *rpath = NULL, *runpath = NULL; |
9acc85a6 | 4220 | const Elf_Internal_Phdr *phdr; |
e310298c | 4221 | struct elf_link_loaded_list *loaded_lib; |
4ad4eba5 AM |
4222 | |
4223 | /* ld --just-symbols and dynamic objects don't mix very well. | |
92fd189d | 4224 | ld shouldn't allow it. */ |
29a9f53e | 4225 | if (just_syms) |
92fd189d | 4226 | abort (); |
4ad4eba5 AM |
4227 | |
4228 | /* If this dynamic lib was specified on the command line with | |
4229 | --as-needed in effect, then we don't want to add a DT_NEEDED | |
4230 | tag unless the lib is actually used. Similary for libs brought | |
e56f61be L |
4231 | in by another lib's DT_NEEDED. When --no-add-needed is used |
4232 | on a dynamic lib, we don't want to add a DT_NEEDED entry for | |
4233 | any dynamic library in DT_NEEDED tags in the dynamic lib at | |
4234 | all. */ | |
4235 | add_needed = (elf_dyn_lib_class (abfd) | |
4236 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | |
4237 | | DYN_NO_NEEDED)) == 0; | |
4ad4eba5 AM |
4238 | |
4239 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
4240 | if (s != NULL) | |
4241 | { | |
4242 | bfd_byte *dynbuf; | |
4243 | bfd_byte *extdyn; | |
cb33740c | 4244 | unsigned int elfsec; |
4ad4eba5 AM |
4245 | unsigned long shlink; |
4246 | ||
eea6121a | 4247 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) |
f8703194 | 4248 | { |
dc1e8a47 | 4249 | error_free_dyn: |
f8703194 L |
4250 | free (dynbuf); |
4251 | goto error_return; | |
4252 | } | |
4ad4eba5 AM |
4253 | |
4254 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 4255 | if (elfsec == SHN_BAD) |
4ad4eba5 AM |
4256 | goto error_free_dyn; |
4257 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
4258 | ||
4259 | for (extdyn = dynbuf; | |
9bff840e | 4260 | extdyn <= dynbuf + s->size - bed->s->sizeof_dyn; |
4ad4eba5 AM |
4261 | extdyn += bed->s->sizeof_dyn) |
4262 | { | |
4263 | Elf_Internal_Dyn dyn; | |
4264 | ||
4265 | bed->s->swap_dyn_in (abfd, extdyn, &dyn); | |
4266 | if (dyn.d_tag == DT_SONAME) | |
4267 | { | |
4268 | unsigned int tagv = dyn.d_un.d_val; | |
4269 | soname = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
4270 | if (soname == NULL) | |
4271 | goto error_free_dyn; | |
4272 | } | |
4273 | if (dyn.d_tag == DT_NEEDED) | |
4274 | { | |
4275 | struct bfd_link_needed_list *n, **pn; | |
4276 | char *fnm, *anm; | |
4277 | unsigned int tagv = dyn.d_un.d_val; | |
986f0783 | 4278 | size_t amt = sizeof (struct bfd_link_needed_list); |
4ad4eba5 | 4279 | |
a50b1753 | 4280 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4281 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
4282 | if (n == NULL || fnm == NULL) | |
4283 | goto error_free_dyn; | |
4284 | amt = strlen (fnm) + 1; | |
a50b1753 | 4285 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4286 | if (anm == NULL) |
4287 | goto error_free_dyn; | |
4288 | memcpy (anm, fnm, amt); | |
4289 | n->name = anm; | |
4290 | n->by = abfd; | |
4291 | n->next = NULL; | |
66eb6687 | 4292 | for (pn = &htab->needed; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
4293 | ; |
4294 | *pn = n; | |
4295 | } | |
4296 | if (dyn.d_tag == DT_RUNPATH) | |
4297 | { | |
4298 | struct bfd_link_needed_list *n, **pn; | |
4299 | char *fnm, *anm; | |
4300 | unsigned int tagv = dyn.d_un.d_val; | |
986f0783 | 4301 | size_t amt = sizeof (struct bfd_link_needed_list); |
4ad4eba5 | 4302 | |
a50b1753 | 4303 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4304 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
4305 | if (n == NULL || fnm == NULL) | |
4306 | goto error_free_dyn; | |
4307 | amt = strlen (fnm) + 1; | |
a50b1753 | 4308 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4309 | if (anm == NULL) |
4310 | goto error_free_dyn; | |
4311 | memcpy (anm, fnm, amt); | |
4312 | n->name = anm; | |
4313 | n->by = abfd; | |
4314 | n->next = NULL; | |
4315 | for (pn = & runpath; | |
4316 | *pn != NULL; | |
4317 | pn = &(*pn)->next) | |
4318 | ; | |
4319 | *pn = n; | |
4320 | } | |
4321 | /* Ignore DT_RPATH if we have seen DT_RUNPATH. */ | |
4322 | if (!runpath && dyn.d_tag == DT_RPATH) | |
4323 | { | |
4324 | struct bfd_link_needed_list *n, **pn; | |
4325 | char *fnm, *anm; | |
4326 | unsigned int tagv = dyn.d_un.d_val; | |
986f0783 | 4327 | size_t amt = sizeof (struct bfd_link_needed_list); |
4ad4eba5 | 4328 | |
a50b1753 | 4329 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4330 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
4331 | if (n == NULL || fnm == NULL) | |
4332 | goto error_free_dyn; | |
4333 | amt = strlen (fnm) + 1; | |
a50b1753 | 4334 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 | 4335 | if (anm == NULL) |
f8703194 | 4336 | goto error_free_dyn; |
4ad4eba5 AM |
4337 | memcpy (anm, fnm, amt); |
4338 | n->name = anm; | |
4339 | n->by = abfd; | |
4340 | n->next = NULL; | |
4341 | for (pn = & rpath; | |
4342 | *pn != NULL; | |
4343 | pn = &(*pn)->next) | |
4344 | ; | |
4345 | *pn = n; | |
4346 | } | |
7ee314fa AM |
4347 | if (dyn.d_tag == DT_AUDIT) |
4348 | { | |
4349 | unsigned int tagv = dyn.d_un.d_val; | |
4350 | audit = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
4351 | } | |
4ad4eba5 AM |
4352 | } |
4353 | ||
4354 | free (dynbuf); | |
4355 | } | |
4356 | ||
4357 | /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that | |
4358 | frees all more recently bfd_alloc'd blocks as well. */ | |
4359 | if (runpath) | |
4360 | rpath = runpath; | |
4361 | ||
4362 | if (rpath) | |
4363 | { | |
4364 | struct bfd_link_needed_list **pn; | |
66eb6687 | 4365 | for (pn = &htab->runpath; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
4366 | ; |
4367 | *pn = rpath; | |
4368 | } | |
4369 | ||
9acc85a6 AM |
4370 | /* If we have a PT_GNU_RELRO program header, mark as read-only |
4371 | all sections contained fully therein. This makes relro | |
4372 | shared library sections appear as they will at run-time. */ | |
4373 | phdr = elf_tdata (abfd)->phdr + elf_elfheader (abfd)->e_phnum; | |
54025d58 | 4374 | while (phdr-- > elf_tdata (abfd)->phdr) |
9acc85a6 AM |
4375 | if (phdr->p_type == PT_GNU_RELRO) |
4376 | { | |
4377 | for (s = abfd->sections; s != NULL; s = s->next) | |
502794d4 CE |
4378 | { |
4379 | unsigned int opb = bfd_octets_per_byte (abfd, s); | |
4380 | ||
4381 | if ((s->flags & SEC_ALLOC) != 0 | |
4382 | && s->vma * opb >= phdr->p_vaddr | |
4383 | && s->vma * opb + s->size <= phdr->p_vaddr + phdr->p_memsz) | |
4384 | s->flags |= SEC_READONLY; | |
4385 | } | |
9acc85a6 AM |
4386 | break; |
4387 | } | |
4388 | ||
4ad4eba5 AM |
4389 | /* We do not want to include any of the sections in a dynamic |
4390 | object in the output file. We hack by simply clobbering the | |
4391 | list of sections in the BFD. This could be handled more | |
4392 | cleanly by, say, a new section flag; the existing | |
4393 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
4394 | still implies that the section takes up space in the output | |
4395 | file. */ | |
4396 | bfd_section_list_clear (abfd); | |
4397 | ||
4ad4eba5 AM |
4398 | /* Find the name to use in a DT_NEEDED entry that refers to this |
4399 | object. If the object has a DT_SONAME entry, we use it. | |
4400 | Otherwise, if the generic linker stuck something in | |
4401 | elf_dt_name, we use that. Otherwise, we just use the file | |
4402 | name. */ | |
4403 | if (soname == NULL || *soname == '\0') | |
4404 | { | |
4405 | soname = elf_dt_name (abfd); | |
4406 | if (soname == NULL || *soname == '\0') | |
4407 | soname = bfd_get_filename (abfd); | |
4408 | } | |
4409 | ||
4410 | /* Save the SONAME because sometimes the linker emulation code | |
4411 | will need to know it. */ | |
4412 | elf_dt_name (abfd) = soname; | |
4413 | ||
4ad4eba5 AM |
4414 | /* If we have already included this dynamic object in the |
4415 | link, just ignore it. There is no reason to include a | |
4416 | particular dynamic object more than once. */ | |
e310298c AM |
4417 | for (loaded_lib = htab->dyn_loaded; |
4418 | loaded_lib != NULL; | |
4419 | loaded_lib = loaded_lib->next) | |
4420 | { | |
4421 | if (strcmp (elf_dt_name (loaded_lib->abfd), soname) == 0) | |
0a1b45a2 | 4422 | return true; |
e310298c AM |
4423 | } |
4424 | ||
4425 | /* Create dynamic sections for backends that require that be done | |
4426 | before setup_gnu_properties. */ | |
4427 | if (add_needed | |
4428 | && !_bfd_elf_link_create_dynamic_sections (abfd, info)) | |
0a1b45a2 | 4429 | return false; |
7ee314fa AM |
4430 | |
4431 | /* Save the DT_AUDIT entry for the linker emulation code. */ | |
68ffbac6 | 4432 | elf_dt_audit (abfd) = audit; |
4ad4eba5 AM |
4433 | } |
4434 | ||
4435 | /* If this is a dynamic object, we always link against the .dynsym | |
4436 | symbol table, not the .symtab symbol table. The dynamic linker | |
4437 | will only see the .dynsym symbol table, so there is no reason to | |
4438 | look at .symtab for a dynamic object. */ | |
4439 | ||
4440 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
4441 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
4442 | else | |
4443 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
4444 | ||
4445 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
4446 | ||
4447 | /* The sh_info field of the symtab header tells us where the | |
4448 | external symbols start. We don't care about the local symbols at | |
4449 | this point. */ | |
4450 | if (elf_bad_symtab (abfd)) | |
4451 | { | |
4452 | extsymcount = symcount; | |
4453 | extsymoff = 0; | |
4454 | } | |
4455 | else | |
4456 | { | |
4457 | extsymcount = symcount - hdr->sh_info; | |
4458 | extsymoff = hdr->sh_info; | |
4459 | } | |
4460 | ||
f45794cb | 4461 | sym_hash = elf_sym_hashes (abfd); |
012b2306 | 4462 | if (extsymcount != 0) |
4ad4eba5 AM |
4463 | { |
4464 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
4465 | NULL, NULL, NULL); | |
4466 | if (isymbuf == NULL) | |
4467 | goto error_return; | |
4468 | ||
4ad4eba5 | 4469 | if (sym_hash == NULL) |
012b2306 AM |
4470 | { |
4471 | /* We store a pointer to the hash table entry for each | |
4472 | external symbol. */ | |
986f0783 | 4473 | size_t amt = extsymcount * sizeof (struct elf_link_hash_entry *); |
012b2306 AM |
4474 | sym_hash = (struct elf_link_hash_entry **) bfd_zalloc (abfd, amt); |
4475 | if (sym_hash == NULL) | |
4476 | goto error_free_sym; | |
4477 | elf_sym_hashes (abfd) = sym_hash; | |
4478 | } | |
4ad4eba5 AM |
4479 | } |
4480 | ||
4481 | if (dynamic) | |
4482 | { | |
4483 | /* Read in any version definitions. */ | |
fc0e6df6 PB |
4484 | if (!_bfd_elf_slurp_version_tables (abfd, |
4485 | info->default_imported_symver)) | |
4ad4eba5 AM |
4486 | goto error_free_sym; |
4487 | ||
4488 | /* Read in the symbol versions, but don't bother to convert them | |
4489 | to internal format. */ | |
4490 | if (elf_dynversym (abfd) != 0) | |
4491 | { | |
986f0783 AM |
4492 | Elf_Internal_Shdr *versymhdr = &elf_tdata (abfd)->dynversym_hdr; |
4493 | bfd_size_type amt = versymhdr->sh_size; | |
4ad4eba5 | 4494 | |
2bb3687b AM |
4495 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0) |
4496 | goto error_free_sym; | |
4497 | extversym = (Elf_External_Versym *) | |
4498 | _bfd_malloc_and_read (abfd, amt, amt); | |
4ad4eba5 AM |
4499 | if (extversym == NULL) |
4500 | goto error_free_sym; | |
986f0783 | 4501 | extversym_end = extversym + amt / sizeof (*extversym); |
4ad4eba5 AM |
4502 | } |
4503 | } | |
4504 | ||
66eb6687 AM |
4505 | /* If we are loading an as-needed shared lib, save the symbol table |
4506 | state before we start adding symbols. If the lib turns out | |
4507 | to be unneeded, restore the state. */ | |
4508 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
4509 | { | |
4510 | unsigned int i; | |
4511 | size_t entsize; | |
4512 | ||
4513 | for (entsize = 0, i = 0; i < htab->root.table.size; i++) | |
4514 | { | |
4515 | struct bfd_hash_entry *p; | |
2de92251 | 4516 | struct elf_link_hash_entry *h; |
66eb6687 AM |
4517 | |
4518 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
2de92251 AM |
4519 | { |
4520 | h = (struct elf_link_hash_entry *) p; | |
4521 | entsize += htab->root.table.entsize; | |
4522 | if (h->root.type == bfd_link_hash_warning) | |
7ba11550 AM |
4523 | { |
4524 | entsize += htab->root.table.entsize; | |
4525 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4526 | } | |
4527 | if (h->root.type == bfd_link_hash_common) | |
4528 | entsize += sizeof (*h->root.u.c.p); | |
2de92251 | 4529 | } |
66eb6687 AM |
4530 | } |
4531 | ||
4532 | tabsize = htab->root.table.size * sizeof (struct bfd_hash_entry *); | |
f45794cb | 4533 | old_tab = bfd_malloc (tabsize + entsize); |
66eb6687 AM |
4534 | if (old_tab == NULL) |
4535 | goto error_free_vers; | |
4536 | ||
4537 | /* Remember the current objalloc pointer, so that all mem for | |
4538 | symbols added can later be reclaimed. */ | |
4539 | alloc_mark = bfd_hash_allocate (&htab->root.table, 1); | |
4540 | if (alloc_mark == NULL) | |
4541 | goto error_free_vers; | |
4542 | ||
5061a885 AM |
4543 | /* Make a special call to the linker "notice" function to |
4544 | tell it that we are about to handle an as-needed lib. */ | |
e5034e59 | 4545 | if (!(*bed->notice_as_needed) (abfd, info, notice_as_needed)) |
9af2a943 | 4546 | goto error_free_vers; |
5061a885 | 4547 | |
f45794cb AM |
4548 | /* Clone the symbol table. Remember some pointers into the |
4549 | symbol table, and dynamic symbol count. */ | |
4550 | old_ent = (char *) old_tab + tabsize; | |
66eb6687 | 4551 | memcpy (old_tab, htab->root.table.table, tabsize); |
66eb6687 AM |
4552 | old_undefs = htab->root.undefs; |
4553 | old_undefs_tail = htab->root.undefs_tail; | |
4f87808c AM |
4554 | old_table = htab->root.table.table; |
4555 | old_size = htab->root.table.size; | |
4556 | old_count = htab->root.table.count; | |
e310298c AM |
4557 | old_strtab = NULL; |
4558 | if (htab->dynstr != NULL) | |
4559 | { | |
4560 | old_strtab = _bfd_elf_strtab_save (htab->dynstr); | |
4561 | if (old_strtab == NULL) | |
4562 | goto error_free_vers; | |
4563 | } | |
66eb6687 AM |
4564 | |
4565 | for (i = 0; i < htab->root.table.size; i++) | |
4566 | { | |
4567 | struct bfd_hash_entry *p; | |
2de92251 | 4568 | struct elf_link_hash_entry *h; |
66eb6687 AM |
4569 | |
4570 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
4571 | { | |
2de92251 | 4572 | h = (struct elf_link_hash_entry *) p; |
7ba11550 AM |
4573 | memcpy (old_ent, h, htab->root.table.entsize); |
4574 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
4575 | if (h->root.type == bfd_link_hash_warning) |
4576 | { | |
7ba11550 AM |
4577 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
4578 | memcpy (old_ent, h, htab->root.table.entsize); | |
2de92251 AM |
4579 | old_ent = (char *) old_ent + htab->root.table.entsize; |
4580 | } | |
7ba11550 AM |
4581 | if (h->root.type == bfd_link_hash_common) |
4582 | { | |
4583 | memcpy (old_ent, h->root.u.c.p, sizeof (*h->root.u.c.p)); | |
4584 | old_ent = (char *) old_ent + sizeof (*h->root.u.c.p); | |
4585 | } | |
66eb6687 AM |
4586 | } |
4587 | } | |
4588 | } | |
4ad4eba5 | 4589 | |
66eb6687 | 4590 | weaks = NULL; |
be22c732 NC |
4591 | if (extversym == NULL) |
4592 | ever = NULL; | |
4593 | else if (extversym + extsymoff < extversym_end) | |
4594 | ever = extversym + extsymoff; | |
4595 | else | |
4596 | { | |
4597 | /* xgettext:c-format */ | |
4598 | _bfd_error_handler (_("%pB: invalid version offset %lx (max %lx)"), | |
4599 | abfd, (long) extsymoff, | |
4600 | (long) (extversym_end - extversym) / sizeof (* extversym)); | |
4601 | bfd_set_error (bfd_error_bad_value); | |
4602 | goto error_free_vers; | |
4603 | } | |
4604 | ||
b4c555cf ML |
4605 | if (!bfd_link_relocatable (info) |
4606 | && abfd->lto_slim_object) | |
cc5277b1 ML |
4607 | { |
4608 | _bfd_error_handler | |
4609 | (_("%pB: plugin needed to handle lto object"), abfd); | |
4610 | } | |
4611 | ||
4ad4eba5 AM |
4612 | for (isym = isymbuf, isymend = isymbuf + extsymcount; |
4613 | isym < isymend; | |
4614 | isym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
4615 | { | |
4616 | int bind; | |
4617 | bfd_vma value; | |
af44c138 | 4618 | asection *sec, *new_sec; |
4ad4eba5 AM |
4619 | flagword flags; |
4620 | const char *name; | |
4621 | struct elf_link_hash_entry *h; | |
90c984fc | 4622 | struct elf_link_hash_entry *hi; |
0a1b45a2 AM |
4623 | bool definition; |
4624 | bool size_change_ok; | |
4625 | bool type_change_ok; | |
4626 | bool new_weak; | |
4627 | bool old_weak; | |
7ba11550 | 4628 | bfd *override; |
0a1b45a2 AM |
4629 | bool common; |
4630 | bool discarded; | |
4ad4eba5 | 4631 | unsigned int old_alignment; |
4538d1c7 | 4632 | unsigned int shindex; |
4ad4eba5 | 4633 | bfd *old_bfd; |
0a1b45a2 | 4634 | bool matched; |
4ad4eba5 | 4635 | |
7ba11550 | 4636 | override = NULL; |
4ad4eba5 AM |
4637 | |
4638 | flags = BSF_NO_FLAGS; | |
4639 | sec = NULL; | |
4640 | value = isym->st_value; | |
a4d8e49b | 4641 | common = bed->common_definition (isym); |
2980ccad L |
4642 | if (common && info->inhibit_common_definition) |
4643 | { | |
4644 | /* Treat common symbol as undefined for --no-define-common. */ | |
4645 | isym->st_shndx = SHN_UNDEF; | |
0a1b45a2 | 4646 | common = false; |
2980ccad | 4647 | } |
0a1b45a2 | 4648 | discarded = false; |
4ad4eba5 AM |
4649 | |
4650 | bind = ELF_ST_BIND (isym->st_info); | |
3e7a7d11 | 4651 | switch (bind) |
4ad4eba5 | 4652 | { |
3e7a7d11 | 4653 | case STB_LOCAL: |
4ad4eba5 AM |
4654 | /* This should be impossible, since ELF requires that all |
4655 | global symbols follow all local symbols, and that sh_info | |
4656 | point to the first global symbol. Unfortunately, Irix 5 | |
4657 | screws this up. */ | |
fe3fef62 AM |
4658 | if (elf_bad_symtab (abfd)) |
4659 | continue; | |
4660 | ||
4661 | /* If we aren't prepared to handle locals within the globals | |
4538d1c7 AM |
4662 | then we'll likely segfault on a NULL symbol hash if the |
4663 | symbol is ever referenced in relocations. */ | |
4664 | shindex = elf_elfheader (abfd)->e_shstrndx; | |
4665 | name = bfd_elf_string_from_elf_section (abfd, shindex, hdr->sh_name); | |
4666 | _bfd_error_handler (_("%pB: %s local symbol at index %lu" | |
4667 | " (>= sh_info of %lu)"), | |
4668 | abfd, name, (long) (isym - isymbuf + extsymoff), | |
4669 | (long) extsymoff); | |
4670 | ||
4671 | /* Dynamic object relocations are not processed by ld, so | |
4672 | ld won't run into the problem mentioned above. */ | |
4673 | if (dynamic) | |
4674 | continue; | |
fe3fef62 AM |
4675 | bfd_set_error (bfd_error_bad_value); |
4676 | goto error_free_vers; | |
3e7a7d11 NC |
4677 | |
4678 | case STB_GLOBAL: | |
a4d8e49b | 4679 | if (isym->st_shndx != SHN_UNDEF && !common) |
4ad4eba5 | 4680 | flags = BSF_GLOBAL; |
3e7a7d11 NC |
4681 | break; |
4682 | ||
4683 | case STB_WEAK: | |
4684 | flags = BSF_WEAK; | |
4685 | break; | |
4686 | ||
4687 | case STB_GNU_UNIQUE: | |
4688 | flags = BSF_GNU_UNIQUE; | |
4689 | break; | |
4690 | ||
4691 | default: | |
4ad4eba5 | 4692 | /* Leave it up to the processor backend. */ |
3e7a7d11 | 4693 | break; |
4ad4eba5 AM |
4694 | } |
4695 | ||
4696 | if (isym->st_shndx == SHN_UNDEF) | |
4697 | sec = bfd_und_section_ptr; | |
cb33740c AM |
4698 | else if (isym->st_shndx == SHN_ABS) |
4699 | sec = bfd_abs_section_ptr; | |
4700 | else if (isym->st_shndx == SHN_COMMON) | |
4701 | { | |
4702 | sec = bfd_com_section_ptr; | |
4703 | /* What ELF calls the size we call the value. What ELF | |
4704 | calls the value we call the alignment. */ | |
4705 | value = isym->st_size; | |
4706 | } | |
4707 | else | |
4ad4eba5 AM |
4708 | { |
4709 | sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
4710 | if (sec == NULL) | |
4711 | sec = bfd_abs_section_ptr; | |
dbaa2011 | 4712 | else if (discarded_section (sec)) |
529fcb95 | 4713 | { |
e5d08002 L |
4714 | /* Symbols from discarded section are undefined. We keep |
4715 | its visibility. */ | |
529fcb95 | 4716 | sec = bfd_und_section_ptr; |
0a1b45a2 | 4717 | discarded = true; |
529fcb95 PB |
4718 | isym->st_shndx = SHN_UNDEF; |
4719 | } | |
4ad4eba5 AM |
4720 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
4721 | value -= sec->vma; | |
4722 | } | |
4ad4eba5 AM |
4723 | |
4724 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
4725 | isym->st_name); | |
4726 | if (name == NULL) | |
4727 | goto error_free_vers; | |
4728 | ||
4729 | if (isym->st_shndx == SHN_COMMON | |
02d00247 AM |
4730 | && (abfd->flags & BFD_PLUGIN) != 0) |
4731 | { | |
4732 | asection *xc = bfd_get_section_by_name (abfd, "COMMON"); | |
4733 | ||
4734 | if (xc == NULL) | |
4735 | { | |
4736 | flagword sflags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP | |
4737 | | SEC_EXCLUDE); | |
4738 | xc = bfd_make_section_with_flags (abfd, "COMMON", sflags); | |
4739 | if (xc == NULL) | |
4740 | goto error_free_vers; | |
4741 | } | |
4742 | sec = xc; | |
4743 | } | |
4744 | else if (isym->st_shndx == SHN_COMMON | |
4745 | && ELF_ST_TYPE (isym->st_info) == STT_TLS | |
0e1862bb | 4746 | && !bfd_link_relocatable (info)) |
4ad4eba5 AM |
4747 | { |
4748 | asection *tcomm = bfd_get_section_by_name (abfd, ".tcommon"); | |
4749 | ||
4750 | if (tcomm == NULL) | |
4751 | { | |
02d00247 AM |
4752 | flagword sflags = (SEC_ALLOC | SEC_THREAD_LOCAL | SEC_IS_COMMON |
4753 | | SEC_LINKER_CREATED); | |
4754 | tcomm = bfd_make_section_with_flags (abfd, ".tcommon", sflags); | |
3496cb2a | 4755 | if (tcomm == NULL) |
4ad4eba5 AM |
4756 | goto error_free_vers; |
4757 | } | |
4758 | sec = tcomm; | |
4759 | } | |
66eb6687 | 4760 | else if (bed->elf_add_symbol_hook) |
4ad4eba5 | 4761 | { |
66eb6687 AM |
4762 | if (! (*bed->elf_add_symbol_hook) (abfd, info, isym, &name, &flags, |
4763 | &sec, &value)) | |
4ad4eba5 AM |
4764 | goto error_free_vers; |
4765 | ||
4766 | /* The hook function sets the name to NULL if this symbol | |
4767 | should be skipped for some reason. */ | |
4768 | if (name == NULL) | |
4769 | continue; | |
4770 | } | |
4771 | ||
4772 | /* Sanity check that all possibilities were handled. */ | |
4773 | if (sec == NULL) | |
4538d1c7 | 4774 | abort (); |
4ad4eba5 | 4775 | |
191c0c42 AM |
4776 | /* Silently discard TLS symbols from --just-syms. There's |
4777 | no way to combine a static TLS block with a new TLS block | |
4778 | for this executable. */ | |
4779 | if (ELF_ST_TYPE (isym->st_info) == STT_TLS | |
4780 | && sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
4781 | continue; | |
4782 | ||
4ad4eba5 AM |
4783 | if (bfd_is_und_section (sec) |
4784 | || bfd_is_com_section (sec)) | |
0a1b45a2 | 4785 | definition = false; |
4ad4eba5 | 4786 | else |
0a1b45a2 | 4787 | definition = true; |
4ad4eba5 | 4788 | |
0a1b45a2 | 4789 | size_change_ok = false; |
66eb6687 | 4790 | type_change_ok = bed->type_change_ok; |
0a1b45a2 AM |
4791 | old_weak = false; |
4792 | matched = false; | |
4ad4eba5 AM |
4793 | old_alignment = 0; |
4794 | old_bfd = NULL; | |
af44c138 | 4795 | new_sec = sec; |
4ad4eba5 | 4796 | |
2cc15b10 | 4797 | if (is_elf_hash_table (&htab->root)) |
4ad4eba5 AM |
4798 | { |
4799 | Elf_Internal_Versym iver; | |
4800 | unsigned int vernum = 0; | |
0a1b45a2 | 4801 | bool skip; |
4ad4eba5 | 4802 | |
fc0e6df6 | 4803 | if (ever == NULL) |
4ad4eba5 | 4804 | { |
fc0e6df6 PB |
4805 | if (info->default_imported_symver) |
4806 | /* Use the default symbol version created earlier. */ | |
4807 | iver.vs_vers = elf_tdata (abfd)->cverdefs; | |
4808 | else | |
4809 | iver.vs_vers = 0; | |
4810 | } | |
be22c732 NC |
4811 | else if (ever >= extversym_end) |
4812 | { | |
4813 | /* xgettext:c-format */ | |
4814 | _bfd_error_handler (_("%pB: not enough version information"), | |
4815 | abfd); | |
4816 | bfd_set_error (bfd_error_bad_value); | |
4817 | goto error_free_vers; | |
4818 | } | |
fc0e6df6 PB |
4819 | else |
4820 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
4821 | ||
4822 | vernum = iver.vs_vers & VERSYM_VERSION; | |
4823 | ||
4824 | /* If this is a hidden symbol, or if it is not version | |
4825 | 1, we append the version name to the symbol name. | |
cc86ff91 EB |
4826 | However, we do not modify a non-hidden absolute symbol |
4827 | if it is not a function, because it might be the version | |
4828 | symbol itself. FIXME: What if it isn't? */ | |
fc0e6df6 | 4829 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 |
fcb93ecf PB |
4830 | || (vernum > 1 |
4831 | && (!bfd_is_abs_section (sec) | |
4832 | || bed->is_function_type (ELF_ST_TYPE (isym->st_info))))) | |
fc0e6df6 PB |
4833 | { |
4834 | const char *verstr; | |
4835 | size_t namelen, verlen, newlen; | |
4836 | char *newname, *p; | |
4837 | ||
4838 | if (isym->st_shndx != SHN_UNDEF) | |
4ad4eba5 | 4839 | { |
fc0e6df6 PB |
4840 | if (vernum > elf_tdata (abfd)->cverdefs) |
4841 | verstr = NULL; | |
4842 | else if (vernum > 1) | |
4843 | verstr = | |
4844 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
4845 | else | |
4846 | verstr = ""; | |
4ad4eba5 | 4847 | |
fc0e6df6 | 4848 | if (verstr == NULL) |
4ad4eba5 | 4849 | { |
4eca0228 | 4850 | _bfd_error_handler |
695344c0 | 4851 | /* xgettext:c-format */ |
871b3ab2 | 4852 | (_("%pB: %s: invalid version %u (max %d)"), |
fc0e6df6 PB |
4853 | abfd, name, vernum, |
4854 | elf_tdata (abfd)->cverdefs); | |
4855 | bfd_set_error (bfd_error_bad_value); | |
4856 | goto error_free_vers; | |
4ad4eba5 | 4857 | } |
fc0e6df6 PB |
4858 | } |
4859 | else | |
4860 | { | |
4861 | /* We cannot simply test for the number of | |
4862 | entries in the VERNEED section since the | |
4863 | numbers for the needed versions do not start | |
4864 | at 0. */ | |
4865 | Elf_Internal_Verneed *t; | |
4866 | ||
4867 | verstr = NULL; | |
4868 | for (t = elf_tdata (abfd)->verref; | |
4869 | t != NULL; | |
4870 | t = t->vn_nextref) | |
4ad4eba5 | 4871 | { |
fc0e6df6 | 4872 | Elf_Internal_Vernaux *a; |
4ad4eba5 | 4873 | |
fc0e6df6 PB |
4874 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) |
4875 | { | |
4876 | if (a->vna_other == vernum) | |
4ad4eba5 | 4877 | { |
fc0e6df6 PB |
4878 | verstr = a->vna_nodename; |
4879 | break; | |
4ad4eba5 | 4880 | } |
4ad4eba5 | 4881 | } |
fc0e6df6 PB |
4882 | if (a != NULL) |
4883 | break; | |
4884 | } | |
4885 | if (verstr == NULL) | |
4886 | { | |
4eca0228 | 4887 | _bfd_error_handler |
695344c0 | 4888 | /* xgettext:c-format */ |
871b3ab2 | 4889 | (_("%pB: %s: invalid needed version %d"), |
fc0e6df6 PB |
4890 | abfd, name, vernum); |
4891 | bfd_set_error (bfd_error_bad_value); | |
4892 | goto error_free_vers; | |
4ad4eba5 | 4893 | } |
4ad4eba5 | 4894 | } |
fc0e6df6 PB |
4895 | |
4896 | namelen = strlen (name); | |
4897 | verlen = strlen (verstr); | |
4898 | newlen = namelen + verlen + 2; | |
4899 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4900 | && isym->st_shndx != SHN_UNDEF) | |
4901 | ++newlen; | |
4902 | ||
a50b1753 | 4903 | newname = (char *) bfd_hash_allocate (&htab->root.table, newlen); |
fc0e6df6 PB |
4904 | if (newname == NULL) |
4905 | goto error_free_vers; | |
4906 | memcpy (newname, name, namelen); | |
4907 | p = newname + namelen; | |
4908 | *p++ = ELF_VER_CHR; | |
4909 | /* If this is a defined non-hidden version symbol, | |
4910 | we add another @ to the name. This indicates the | |
4911 | default version of the symbol. */ | |
4912 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4913 | && isym->st_shndx != SHN_UNDEF) | |
4914 | *p++ = ELF_VER_CHR; | |
4915 | memcpy (p, verstr, verlen + 1); | |
4916 | ||
4917 | name = newname; | |
4ad4eba5 AM |
4918 | } |
4919 | ||
cd3416da AM |
4920 | /* If this symbol has default visibility and the user has |
4921 | requested we not re-export it, then mark it as hidden. */ | |
a0d49154 | 4922 | if (!bfd_is_und_section (sec) |
cd3416da | 4923 | && !dynamic |
ce875075 | 4924 | && abfd->no_export |
cd3416da AM |
4925 | && ELF_ST_VISIBILITY (isym->st_other) != STV_INTERNAL) |
4926 | isym->st_other = (STV_HIDDEN | |
4927 | | (isym->st_other & ~ELF_ST_VISIBILITY (-1))); | |
4928 | ||
4f3fedcf AM |
4929 | if (!_bfd_elf_merge_symbol (abfd, info, name, isym, &sec, &value, |
4930 | sym_hash, &old_bfd, &old_weak, | |
4931 | &old_alignment, &skip, &override, | |
6e33951e L |
4932 | &type_change_ok, &size_change_ok, |
4933 | &matched)) | |
4ad4eba5 AM |
4934 | goto error_free_vers; |
4935 | ||
4936 | if (skip) | |
4937 | continue; | |
4938 | ||
6e33951e L |
4939 | /* Override a definition only if the new symbol matches the |
4940 | existing one. */ | |
4941 | if (override && matched) | |
0a1b45a2 | 4942 | definition = false; |
4ad4eba5 AM |
4943 | |
4944 | h = *sym_hash; | |
4945 | while (h->root.type == bfd_link_hash_indirect | |
4946 | || h->root.type == bfd_link_hash_warning) | |
4947 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4948 | ||
4ad4eba5 | 4949 | if (elf_tdata (abfd)->verdef != NULL |
4ad4eba5 AM |
4950 | && vernum > 1 |
4951 | && definition) | |
4952 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
4953 | } | |
4954 | ||
4955 | if (! (_bfd_generic_link_add_one_symbol | |
7ba11550 | 4956 | (info, override ? override : abfd, name, flags, sec, value, |
0a1b45a2 | 4957 | NULL, false, bed->collect, |
4ad4eba5 AM |
4958 | (struct bfd_link_hash_entry **) sym_hash))) |
4959 | goto error_free_vers; | |
4960 | ||
4961 | h = *sym_hash; | |
90c984fc L |
4962 | /* We need to make sure that indirect symbol dynamic flags are |
4963 | updated. */ | |
4964 | hi = h; | |
4ad4eba5 AM |
4965 | while (h->root.type == bfd_link_hash_indirect |
4966 | || h->root.type == bfd_link_hash_warning) | |
4967 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3e7a7d11 | 4968 | |
d1cbe007 AM |
4969 | *sym_hash = h; |
4970 | ||
97196564 L |
4971 | /* Setting the index to -3 tells elf_link_output_extsym that |
4972 | this symbol is defined in a discarded section. */ | |
2cc15b10 | 4973 | if (discarded && is_elf_hash_table (&htab->root)) |
97196564 L |
4974 | h->indx = -3; |
4975 | ||
37a9e49a | 4976 | new_weak = (flags & BSF_WEAK) != 0; |
4ad4eba5 AM |
4977 | if (dynamic |
4978 | && definition | |
37a9e49a | 4979 | && new_weak |
fcb93ecf | 4980 | && !bed->is_function_type (ELF_ST_TYPE (isym->st_info)) |
2cc15b10 | 4981 | && is_elf_hash_table (&htab->root) |
60d67dc8 | 4982 | && h->u.alias == NULL) |
4ad4eba5 AM |
4983 | { |
4984 | /* Keep a list of all weak defined non function symbols from | |
60d67dc8 AM |
4985 | a dynamic object, using the alias field. Later in this |
4986 | function we will set the alias field to the correct | |
4ad4eba5 AM |
4987 | value. We only put non-function symbols from dynamic |
4988 | objects on this list, because that happens to be the only | |
4989 | time we need to know the normal symbol corresponding to a | |
4990 | weak symbol, and the information is time consuming to | |
60d67dc8 | 4991 | figure out. If the alias field is not already NULL, |
4ad4eba5 AM |
4992 | then this symbol was already defined by some previous |
4993 | dynamic object, and we will be using that previous | |
4994 | definition anyhow. */ | |
4995 | ||
60d67dc8 | 4996 | h->u.alias = weaks; |
4ad4eba5 | 4997 | weaks = h; |
4ad4eba5 AM |
4998 | } |
4999 | ||
5000 | /* Set the alignment of a common symbol. */ | |
a4d8e49b | 5001 | if ((common || bfd_is_com_section (sec)) |
4ad4eba5 AM |
5002 | && h->root.type == bfd_link_hash_common) |
5003 | { | |
5004 | unsigned int align; | |
5005 | ||
a4d8e49b | 5006 | if (common) |
af44c138 L |
5007 | align = bfd_log2 (isym->st_value); |
5008 | else | |
5009 | { | |
5010 | /* The new symbol is a common symbol in a shared object. | |
5011 | We need to get the alignment from the section. */ | |
5012 | align = new_sec->alignment_power; | |
5013 | } | |
595213d4 | 5014 | if (align > old_alignment) |
4ad4eba5 AM |
5015 | h->root.u.c.p->alignment_power = align; |
5016 | else | |
5017 | h->root.u.c.p->alignment_power = old_alignment; | |
5018 | } | |
5019 | ||
2cc15b10 | 5020 | if (is_elf_hash_table (&htab->root)) |
4ad4eba5 | 5021 | { |
4f3fedcf AM |
5022 | /* Set a flag in the hash table entry indicating the type of |
5023 | reference or definition we just found. A dynamic symbol | |
5024 | is one which is referenced or defined by both a regular | |
5025 | object and a shared object. */ | |
0a1b45a2 | 5026 | bool dynsym = false; |
4f3fedcf | 5027 | |
b1a92c63 AM |
5028 | /* Plugin symbols aren't normal. Don't set def/ref flags. */ |
5029 | if ((abfd->flags & BFD_PLUGIN) != 0) | |
bbaddd4b AM |
5030 | { |
5031 | /* Except for this flag to track nonweak references. */ | |
5032 | if (!definition | |
5033 | && bind != STB_WEAK) | |
5034 | h->ref_ir_nonweak = 1; | |
5035 | } | |
b1a92c63 | 5036 | else if (!dynamic) |
4f3fedcf AM |
5037 | { |
5038 | if (! definition) | |
5039 | { | |
5040 | h->ref_regular = 1; | |
5041 | if (bind != STB_WEAK) | |
5042 | h->ref_regular_nonweak = 1; | |
5043 | } | |
5044 | else | |
5045 | { | |
5046 | h->def_regular = 1; | |
5047 | if (h->def_dynamic) | |
5048 | { | |
5049 | h->def_dynamic = 0; | |
5050 | h->ref_dynamic = 1; | |
5051 | } | |
5052 | } | |
4f3fedcf AM |
5053 | } |
5054 | else | |
5055 | { | |
5056 | if (! definition) | |
5057 | { | |
5058 | h->ref_dynamic = 1; | |
5059 | hi->ref_dynamic = 1; | |
5060 | } | |
5061 | else | |
5062 | { | |
5063 | h->def_dynamic = 1; | |
5064 | hi->def_dynamic = 1; | |
5065 | } | |
b1a92c63 | 5066 | } |
4f3fedcf | 5067 | |
b1a92c63 AM |
5068 | /* If an indirect symbol has been forced local, don't |
5069 | make the real symbol dynamic. */ | |
5070 | if (h != hi && hi->forced_local) | |
5071 | ; | |
5072 | else if (!dynamic) | |
5073 | { | |
5074 | if (bfd_link_dll (info) | |
5075 | || h->def_dynamic | |
5076 | || h->ref_dynamic) | |
0a1b45a2 | 5077 | dynsym = true; |
b1a92c63 AM |
5078 | } |
5079 | else | |
5080 | { | |
5081 | if (h->def_regular | |
5082 | || h->ref_regular | |
5083 | || (h->is_weakalias | |
5084 | && weakdef (h)->dynindx != -1)) | |
0a1b45a2 | 5085 | dynsym = true; |
4f3fedcf AM |
5086 | } |
5087 | ||
5088 | /* Check to see if we need to add an indirect symbol for | |
5089 | the default name. */ | |
726d7d1e AM |
5090 | if ((definition |
5091 | || (!override && h->root.type == bfd_link_hash_common)) | |
5092 | && !(hi != h | |
5093 | && hi->versioned == versioned_hidden)) | |
4f3fedcf | 5094 | if (!_bfd_elf_add_default_symbol (abfd, info, h, name, isym, |
f01fb44c | 5095 | sec, value, &old_bfd, &dynsym)) |
4f3fedcf | 5096 | goto error_free_vers; |
4ad4eba5 AM |
5097 | |
5098 | /* Check the alignment when a common symbol is involved. This | |
5099 | can change when a common symbol is overridden by a normal | |
5100 | definition or a common symbol is ignored due to the old | |
5101 | normal definition. We need to make sure the maximum | |
5102 | alignment is maintained. */ | |
a4d8e49b | 5103 | if ((old_alignment || common) |
4ad4eba5 AM |
5104 | && h->root.type != bfd_link_hash_common) |
5105 | { | |
5106 | unsigned int common_align; | |
5107 | unsigned int normal_align; | |
5108 | unsigned int symbol_align; | |
5109 | bfd *normal_bfd; | |
5110 | bfd *common_bfd; | |
5111 | ||
3a81e825 AM |
5112 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
5113 | || h->root.type == bfd_link_hash_defweak); | |
5114 | ||
4ad4eba5 AM |
5115 | symbol_align = ffs (h->root.u.def.value) - 1; |
5116 | if (h->root.u.def.section->owner != NULL | |
0616a280 AM |
5117 | && (h->root.u.def.section->owner->flags |
5118 | & (DYNAMIC | BFD_PLUGIN)) == 0) | |
4ad4eba5 AM |
5119 | { |
5120 | normal_align = h->root.u.def.section->alignment_power; | |
5121 | if (normal_align > symbol_align) | |
5122 | normal_align = symbol_align; | |
5123 | } | |
5124 | else | |
5125 | normal_align = symbol_align; | |
5126 | ||
5127 | if (old_alignment) | |
5128 | { | |
5129 | common_align = old_alignment; | |
5130 | common_bfd = old_bfd; | |
5131 | normal_bfd = abfd; | |
5132 | } | |
5133 | else | |
5134 | { | |
5135 | common_align = bfd_log2 (isym->st_value); | |
5136 | common_bfd = abfd; | |
5137 | normal_bfd = old_bfd; | |
5138 | } | |
5139 | ||
5140 | if (normal_align < common_align) | |
d07676f8 NC |
5141 | { |
5142 | /* PR binutils/2735 */ | |
5143 | if (normal_bfd == NULL) | |
4eca0228 | 5144 | _bfd_error_handler |
695344c0 | 5145 | /* xgettext:c-format */ |
9793eb77 | 5146 | (_("warning: alignment %u of common symbol `%s' in %pB is" |
871b3ab2 | 5147 | " greater than the alignment (%u) of its section %pA"), |
c08bb8dd AM |
5148 | 1 << common_align, name, common_bfd, |
5149 | 1 << normal_align, h->root.u.def.section); | |
d07676f8 | 5150 | else |
4eca0228 | 5151 | _bfd_error_handler |
695344c0 | 5152 | /* xgettext:c-format */ |
9793eb77 | 5153 | (_("warning: alignment %u of symbol `%s' in %pB" |
871b3ab2 | 5154 | " is smaller than %u in %pB"), |
c08bb8dd AM |
5155 | 1 << normal_align, name, normal_bfd, |
5156 | 1 << common_align, common_bfd); | |
d07676f8 | 5157 | } |
4ad4eba5 AM |
5158 | } |
5159 | ||
83ad0046 | 5160 | /* Remember the symbol size if it isn't undefined. */ |
3a81e825 AM |
5161 | if (isym->st_size != 0 |
5162 | && isym->st_shndx != SHN_UNDEF | |
4ad4eba5 AM |
5163 | && (definition || h->size == 0)) |
5164 | { | |
83ad0046 L |
5165 | if (h->size != 0 |
5166 | && h->size != isym->st_size | |
5167 | && ! size_change_ok) | |
4eca0228 | 5168 | _bfd_error_handler |
695344c0 | 5169 | /* xgettext:c-format */ |
9793eb77 | 5170 | (_("warning: size of symbol `%s' changed" |
2dcf00ce AM |
5171 | " from %" PRIu64 " in %pB to %" PRIu64 " in %pB"), |
5172 | name, (uint64_t) h->size, old_bfd, | |
5173 | (uint64_t) isym->st_size, abfd); | |
4ad4eba5 AM |
5174 | |
5175 | h->size = isym->st_size; | |
5176 | } | |
5177 | ||
5178 | /* If this is a common symbol, then we always want H->SIZE | |
5179 | to be the size of the common symbol. The code just above | |
5180 | won't fix the size if a common symbol becomes larger. We | |
5181 | don't warn about a size change here, because that is | |
4f3fedcf | 5182 | covered by --warn-common. Allow changes between different |
fcb93ecf | 5183 | function types. */ |
4ad4eba5 AM |
5184 | if (h->root.type == bfd_link_hash_common) |
5185 | h->size = h->root.u.c.size; | |
5186 | ||
5187 | if (ELF_ST_TYPE (isym->st_info) != STT_NOTYPE | |
37a9e49a L |
5188 | && ((definition && !new_weak) |
5189 | || (old_weak && h->root.type == bfd_link_hash_common) | |
5190 | || h->type == STT_NOTYPE)) | |
4ad4eba5 | 5191 | { |
2955ec4c L |
5192 | unsigned int type = ELF_ST_TYPE (isym->st_info); |
5193 | ||
5194 | /* Turn an IFUNC symbol from a DSO into a normal FUNC | |
5195 | symbol. */ | |
5196 | if (type == STT_GNU_IFUNC | |
5197 | && (abfd->flags & DYNAMIC) != 0) | |
5198 | type = STT_FUNC; | |
4ad4eba5 | 5199 | |
2955ec4c L |
5200 | if (h->type != type) |
5201 | { | |
5202 | if (h->type != STT_NOTYPE && ! type_change_ok) | |
695344c0 | 5203 | /* xgettext:c-format */ |
4eca0228 | 5204 | _bfd_error_handler |
9793eb77 | 5205 | (_("warning: type of symbol `%s' changed" |
871b3ab2 | 5206 | " from %d to %d in %pB"), |
c08bb8dd | 5207 | name, h->type, type, abfd); |
2955ec4c L |
5208 | |
5209 | h->type = type; | |
5210 | } | |
4ad4eba5 AM |
5211 | } |
5212 | ||
54ac0771 | 5213 | /* Merge st_other field. */ |
5160d0f3 AM |
5214 | elf_merge_st_other (abfd, h, isym->st_other, sec, |
5215 | definition, dynamic); | |
4ad4eba5 | 5216 | |
c3df8c14 | 5217 | /* We don't want to make debug symbol dynamic. */ |
0e1862bb L |
5218 | if (definition |
5219 | && (sec->flags & SEC_DEBUGGING) | |
5220 | && !bfd_link_relocatable (info)) | |
0a1b45a2 | 5221 | dynsym = false; |
c3df8c14 | 5222 | |
b1a92c63 AM |
5223 | /* Nor should we make plugin symbols dynamic. */ |
5224 | if ((abfd->flags & BFD_PLUGIN) != 0) | |
0a1b45a2 | 5225 | dynsym = false; |
b1a92c63 | 5226 | |
35fc36a8 | 5227 | if (definition) |
35399224 L |
5228 | { |
5229 | h->target_internal = isym->st_target_internal; | |
5230 | h->unique_global = (flags & BSF_GNU_UNIQUE) != 0; | |
5231 | } | |
35fc36a8 | 5232 | |
4ad4eba5 AM |
5233 | if (definition && !dynamic) |
5234 | { | |
5235 | char *p = strchr (name, ELF_VER_CHR); | |
5236 | if (p != NULL && p[1] != ELF_VER_CHR) | |
5237 | { | |
5238 | /* Queue non-default versions so that .symver x, x@FOO | |
5239 | aliases can be checked. */ | |
66eb6687 | 5240 | if (!nondeflt_vers) |
4ad4eba5 | 5241 | { |
986f0783 AM |
5242 | size_t amt = ((isymend - isym + 1) |
5243 | * sizeof (struct elf_link_hash_entry *)); | |
ca4be51c AM |
5244 | nondeflt_vers |
5245 | = (struct elf_link_hash_entry **) bfd_malloc (amt); | |
14b1c01e AM |
5246 | if (!nondeflt_vers) |
5247 | goto error_free_vers; | |
4ad4eba5 | 5248 | } |
66eb6687 | 5249 | nondeflt_vers[nondeflt_vers_cnt++] = h; |
4ad4eba5 AM |
5250 | } |
5251 | } | |
5252 | ||
b1a92c63 | 5253 | if (dynsym && h->dynindx == -1) |
4ad4eba5 | 5254 | { |
c152c796 | 5255 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4ad4eba5 | 5256 | goto error_free_vers; |
60d67dc8 AM |
5257 | if (h->is_weakalias |
5258 | && weakdef (h)->dynindx == -1) | |
4ad4eba5 | 5259 | { |
60d67dc8 | 5260 | if (!bfd_elf_link_record_dynamic_symbol (info, weakdef (h))) |
4ad4eba5 AM |
5261 | goto error_free_vers; |
5262 | } | |
5263 | } | |
1f599d0e | 5264 | else if (h->dynindx != -1) |
4ad4eba5 AM |
5265 | /* If the symbol already has a dynamic index, but |
5266 | visibility says it should not be visible, turn it into | |
5267 | a local symbol. */ | |
5268 | switch (ELF_ST_VISIBILITY (h->other)) | |
5269 | { | |
5270 | case STV_INTERNAL: | |
5271 | case STV_HIDDEN: | |
0a1b45a2 AM |
5272 | (*bed->elf_backend_hide_symbol) (info, h, true); |
5273 | dynsym = false; | |
4ad4eba5 AM |
5274 | break; |
5275 | } | |
5276 | ||
5277 | if (!add_needed | |
aef28989 | 5278 | && matched |
4ad4eba5 | 5279 | && definition |
f01fb44c | 5280 | && h->root.type != bfd_link_hash_indirect |
010e5ae2 | 5281 | && ((dynsym |
a896df97 | 5282 | && h->ref_regular_nonweak) |
b1a92c63 AM |
5283 | || (old_bfd != NULL |
5284 | && (old_bfd->flags & BFD_PLUGIN) != 0 | |
bbaddd4b AM |
5285 | && h->ref_ir_nonweak |
5286 | && !info->lto_all_symbols_read) | |
ffa9430d | 5287 | || (h->ref_dynamic_nonweak |
010e5ae2 | 5288 | && (elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0 |
7b15fa7a AM |
5289 | && !on_needed_list (elf_dt_name (abfd), |
5290 | htab->needed, NULL)))) | |
4ad4eba5 | 5291 | { |
4ad4eba5 AM |
5292 | const char *soname = elf_dt_name (abfd); |
5293 | ||
16e4ecc0 AM |
5294 | info->callbacks->minfo ("%!", soname, old_bfd, |
5295 | h->root.root.string); | |
5296 | ||
4ad4eba5 AM |
5297 | /* A symbol from a library loaded via DT_NEEDED of some |
5298 | other library is referenced by a regular object. | |
e56f61be | 5299 | Add a DT_NEEDED entry for it. Issue an error if |
b918acf9 NC |
5300 | --no-add-needed is used and the reference was not |
5301 | a weak one. */ | |
4f3fedcf | 5302 | if (old_bfd != NULL |
b918acf9 | 5303 | && (elf_dyn_lib_class (abfd) & DYN_NO_NEEDED) != 0) |
e56f61be | 5304 | { |
4eca0228 | 5305 | _bfd_error_handler |
695344c0 | 5306 | /* xgettext:c-format */ |
871b3ab2 | 5307 | (_("%pB: undefined reference to symbol '%s'"), |
4f3fedcf | 5308 | old_bfd, name); |
ff5ac77b | 5309 | bfd_set_error (bfd_error_missing_dso); |
e56f61be L |
5310 | goto error_free_vers; |
5311 | } | |
5312 | ||
a50b1753 | 5313 | elf_dyn_lib_class (abfd) = (enum dynamic_lib_link_class) |
ca4be51c | 5314 | (elf_dyn_lib_class (abfd) & ~DYN_AS_NEEDED); |
a5db907e | 5315 | |
e310298c AM |
5316 | /* Create dynamic sections for backends that require |
5317 | that be done before setup_gnu_properties. */ | |
5318 | if (!_bfd_elf_link_create_dynamic_sections (abfd, info)) | |
0a1b45a2 AM |
5319 | return false; |
5320 | add_needed = true; | |
4ad4eba5 AM |
5321 | } |
5322 | } | |
5323 | } | |
5324 | ||
a83ef4d1 L |
5325 | if (info->lto_plugin_active |
5326 | && !bfd_link_relocatable (info) | |
5327 | && (abfd->flags & BFD_PLUGIN) == 0 | |
5328 | && !just_syms | |
5329 | && extsymcount) | |
5330 | { | |
5331 | int r_sym_shift; | |
5332 | ||
5333 | if (bed->s->arch_size == 32) | |
5334 | r_sym_shift = 8; | |
5335 | else | |
5336 | r_sym_shift = 32; | |
5337 | ||
5338 | /* If linker plugin is enabled, set non_ir_ref_regular on symbols | |
5339 | referenced in regular objects so that linker plugin will get | |
5340 | the correct symbol resolution. */ | |
5341 | ||
5342 | sym_hash = elf_sym_hashes (abfd); | |
5343 | for (s = abfd->sections; s != NULL; s = s->next) | |
5344 | { | |
5345 | Elf_Internal_Rela *internal_relocs; | |
5346 | Elf_Internal_Rela *rel, *relend; | |
5347 | ||
5348 | /* Don't check relocations in excluded sections. */ | |
5349 | if ((s->flags & SEC_RELOC) == 0 | |
5350 | || s->reloc_count == 0 | |
5351 | || (s->flags & SEC_EXCLUDE) != 0 | |
5352 | || ((info->strip == strip_all | |
5353 | || info->strip == strip_debugger) | |
5354 | && (s->flags & SEC_DEBUGGING) != 0)) | |
5355 | continue; | |
5356 | ||
5357 | internal_relocs = _bfd_elf_link_read_relocs (abfd, s, NULL, | |
5358 | NULL, | |
5359 | info->keep_memory); | |
5360 | if (internal_relocs == NULL) | |
5361 | goto error_free_vers; | |
5362 | ||
5363 | rel = internal_relocs; | |
5364 | relend = rel + s->reloc_count; | |
5365 | for ( ; rel < relend; rel++) | |
5366 | { | |
5367 | unsigned long r_symndx = rel->r_info >> r_sym_shift; | |
5368 | struct elf_link_hash_entry *h; | |
5369 | ||
5370 | /* Skip local symbols. */ | |
5371 | if (r_symndx < extsymoff) | |
5372 | continue; | |
5373 | ||
5374 | h = sym_hash[r_symndx - extsymoff]; | |
5375 | if (h != NULL) | |
5376 | h->root.non_ir_ref_regular = 1; | |
5377 | } | |
5378 | ||
5379 | if (elf_section_data (s)->relocs != internal_relocs) | |
5380 | free (internal_relocs); | |
5381 | } | |
5382 | } | |
5383 | ||
c9594989 AM |
5384 | free (extversym); |
5385 | extversym = NULL; | |
5386 | free (isymbuf); | |
5387 | isymbuf = NULL; | |
66eb6687 AM |
5388 | |
5389 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
5390 | { | |
5391 | unsigned int i; | |
5392 | ||
5393 | /* Restore the symbol table. */ | |
f45794cb AM |
5394 | old_ent = (char *) old_tab + tabsize; |
5395 | memset (elf_sym_hashes (abfd), 0, | |
5396 | extsymcount * sizeof (struct elf_link_hash_entry *)); | |
4f87808c AM |
5397 | htab->root.table.table = old_table; |
5398 | htab->root.table.size = old_size; | |
5399 | htab->root.table.count = old_count; | |
66eb6687 | 5400 | memcpy (htab->root.table.table, old_tab, tabsize); |
66eb6687 AM |
5401 | htab->root.undefs = old_undefs; |
5402 | htab->root.undefs_tail = old_undefs_tail; | |
e310298c AM |
5403 | if (htab->dynstr != NULL) |
5404 | _bfd_elf_strtab_restore (htab->dynstr, old_strtab); | |
5b677558 AM |
5405 | free (old_strtab); |
5406 | old_strtab = NULL; | |
66eb6687 AM |
5407 | for (i = 0; i < htab->root.table.size; i++) |
5408 | { | |
5409 | struct bfd_hash_entry *p; | |
5410 | struct elf_link_hash_entry *h; | |
4070765b | 5411 | unsigned int non_ir_ref_dynamic; |
66eb6687 AM |
5412 | |
5413 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
5414 | { | |
4070765b | 5415 | /* Preserve non_ir_ref_dynamic so that this symbol |
59fa66c5 L |
5416 | will be exported when the dynamic lib becomes needed |
5417 | in the second pass. */ | |
7ba11550 AM |
5418 | h = (struct elf_link_hash_entry *) p; |
5419 | if (h->root.type == bfd_link_hash_warning) | |
5420 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4070765b | 5421 | non_ir_ref_dynamic = h->root.non_ir_ref_dynamic; |
7ba11550 | 5422 | |
2de92251 | 5423 | h = (struct elf_link_hash_entry *) p; |
7ba11550 AM |
5424 | memcpy (h, old_ent, htab->root.table.entsize); |
5425 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
5426 | if (h->root.type == bfd_link_hash_warning) |
5427 | { | |
a4542f1b | 5428 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
7ba11550 AM |
5429 | memcpy (h, old_ent, htab->root.table.entsize); |
5430 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 | 5431 | } |
a4542f1b | 5432 | if (h->root.type == bfd_link_hash_common) |
3e0882af | 5433 | { |
7ba11550 AM |
5434 | memcpy (h->root.u.c.p, old_ent, sizeof (*h->root.u.c.p)); |
5435 | old_ent = (char *) old_ent + sizeof (*h->root.u.c.p); | |
3e0882af | 5436 | } |
4070765b | 5437 | h->root.non_ir_ref_dynamic = non_ir_ref_dynamic; |
66eb6687 AM |
5438 | } |
5439 | } | |
5440 | ||
5061a885 AM |
5441 | /* Make a special call to the linker "notice" function to |
5442 | tell it that symbols added for crefs may need to be removed. */ | |
e5034e59 | 5443 | if (!(*bed->notice_as_needed) (abfd, info, notice_not_needed)) |
9af2a943 | 5444 | goto error_free_vers; |
5061a885 | 5445 | |
66eb6687 AM |
5446 | free (old_tab); |
5447 | objalloc_free_block ((struct objalloc *) htab->root.table.memory, | |
5448 | alloc_mark); | |
c9594989 | 5449 | free (nondeflt_vers); |
0a1b45a2 | 5450 | return true; |
66eb6687 | 5451 | } |
2de92251 | 5452 | |
66eb6687 AM |
5453 | if (old_tab != NULL) |
5454 | { | |
e5034e59 | 5455 | if (!(*bed->notice_as_needed) (abfd, info, notice_needed)) |
9af2a943 | 5456 | goto error_free_vers; |
66eb6687 AM |
5457 | free (old_tab); |
5458 | old_tab = NULL; | |
5459 | } | |
5460 | ||
c6e8a9a8 L |
5461 | /* Now that all the symbols from this input file are created, if |
5462 | not performing a relocatable link, handle .symver foo, foo@BAR | |
5463 | such that any relocs against foo become foo@BAR. */ | |
0e1862bb | 5464 | if (!bfd_link_relocatable (info) && nondeflt_vers != NULL) |
4ad4eba5 | 5465 | { |
ef53be89 | 5466 | size_t cnt, symidx; |
4ad4eba5 AM |
5467 | |
5468 | for (cnt = 0; cnt < nondeflt_vers_cnt; ++cnt) | |
5469 | { | |
5470 | struct elf_link_hash_entry *h = nondeflt_vers[cnt], *hi; | |
5471 | char *shortname, *p; | |
986f0783 | 5472 | size_t amt; |
4ad4eba5 AM |
5473 | |
5474 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
5475 | if (p == NULL | |
5476 | || (h->root.type != bfd_link_hash_defined | |
5477 | && h->root.type != bfd_link_hash_defweak)) | |
5478 | continue; | |
5479 | ||
5480 | amt = p - h->root.root.string; | |
a50b1753 | 5481 | shortname = (char *) bfd_malloc (amt + 1); |
14b1c01e AM |
5482 | if (!shortname) |
5483 | goto error_free_vers; | |
4ad4eba5 AM |
5484 | memcpy (shortname, h->root.root.string, amt); |
5485 | shortname[amt] = '\0'; | |
5486 | ||
5487 | hi = (struct elf_link_hash_entry *) | |
66eb6687 | 5488 | bfd_link_hash_lookup (&htab->root, shortname, |
0a1b45a2 | 5489 | false, false, false); |
4ad4eba5 AM |
5490 | if (hi != NULL |
5491 | && hi->root.type == h->root.type | |
5492 | && hi->root.u.def.value == h->root.u.def.value | |
5493 | && hi->root.u.def.section == h->root.u.def.section) | |
5494 | { | |
0a1b45a2 | 5495 | (*bed->elf_backend_hide_symbol) (info, hi, true); |
4ad4eba5 AM |
5496 | hi->root.type = bfd_link_hash_indirect; |
5497 | hi->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
fcfa13d2 | 5498 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
4ad4eba5 AM |
5499 | sym_hash = elf_sym_hashes (abfd); |
5500 | if (sym_hash) | |
5501 | for (symidx = 0; symidx < extsymcount; ++symidx) | |
5502 | if (sym_hash[symidx] == hi) | |
5503 | { | |
5504 | sym_hash[symidx] = h; | |
5505 | break; | |
5506 | } | |
5507 | } | |
5508 | free (shortname); | |
5509 | } | |
5510 | free (nondeflt_vers); | |
5511 | nondeflt_vers = NULL; | |
5512 | } | |
5513 | ||
60d67dc8 | 5514 | /* Now set the alias field correctly for all the weak defined |
4ad4eba5 AM |
5515 | symbols we found. The only way to do this is to search all the |
5516 | symbols. Since we only need the information for non functions in | |
5517 | dynamic objects, that's the only time we actually put anything on | |
5518 | the list WEAKS. We need this information so that if a regular | |
5519 | object refers to a symbol defined weakly in a dynamic object, the | |
5520 | real symbol in the dynamic object is also put in the dynamic | |
5521 | symbols; we also must arrange for both symbols to point to the | |
5522 | same memory location. We could handle the general case of symbol | |
5523 | aliasing, but a general symbol alias can only be generated in | |
5524 | assembler code, handling it correctly would be very time | |
5525 | consuming, and other ELF linkers don't handle general aliasing | |
5526 | either. */ | |
5527 | if (weaks != NULL) | |
5528 | { | |
5529 | struct elf_link_hash_entry **hpp; | |
5530 | struct elf_link_hash_entry **hppend; | |
5531 | struct elf_link_hash_entry **sorted_sym_hash; | |
5532 | struct elf_link_hash_entry *h; | |
986f0783 | 5533 | size_t sym_count, amt; |
4ad4eba5 AM |
5534 | |
5535 | /* Since we have to search the whole symbol list for each weak | |
5536 | defined symbol, search time for N weak defined symbols will be | |
5537 | O(N^2). Binary search will cut it down to O(NlogN). */ | |
986f0783 | 5538 | amt = extsymcount * sizeof (*sorted_sym_hash); |
3a3f4bf7 | 5539 | sorted_sym_hash = bfd_malloc (amt); |
4ad4eba5 AM |
5540 | if (sorted_sym_hash == NULL) |
5541 | goto error_return; | |
5542 | sym_hash = sorted_sym_hash; | |
5543 | hpp = elf_sym_hashes (abfd); | |
5544 | hppend = hpp + extsymcount; | |
5545 | sym_count = 0; | |
5546 | for (; hpp < hppend; hpp++) | |
5547 | { | |
5548 | h = *hpp; | |
5549 | if (h != NULL | |
5550 | && h->root.type == bfd_link_hash_defined | |
fcb93ecf | 5551 | && !bed->is_function_type (h->type)) |
4ad4eba5 AM |
5552 | { |
5553 | *sym_hash = h; | |
5554 | sym_hash++; | |
5555 | sym_count++; | |
5556 | } | |
5557 | } | |
5558 | ||
3a3f4bf7 | 5559 | qsort (sorted_sym_hash, sym_count, sizeof (*sorted_sym_hash), |
4ad4eba5 AM |
5560 | elf_sort_symbol); |
5561 | ||
5562 | while (weaks != NULL) | |
5563 | { | |
5564 | struct elf_link_hash_entry *hlook; | |
5565 | asection *slook; | |
5566 | bfd_vma vlook; | |
ed54588d | 5567 | size_t i, j, idx = 0; |
4ad4eba5 AM |
5568 | |
5569 | hlook = weaks; | |
60d67dc8 AM |
5570 | weaks = hlook->u.alias; |
5571 | hlook->u.alias = NULL; | |
4ad4eba5 | 5572 | |
e3e53eed AM |
5573 | if (hlook->root.type != bfd_link_hash_defined |
5574 | && hlook->root.type != bfd_link_hash_defweak) | |
5575 | continue; | |
5576 | ||
4ad4eba5 AM |
5577 | slook = hlook->root.u.def.section; |
5578 | vlook = hlook->root.u.def.value; | |
5579 | ||
4ad4eba5 AM |
5580 | i = 0; |
5581 | j = sym_count; | |
14160578 | 5582 | while (i != j) |
4ad4eba5 AM |
5583 | { |
5584 | bfd_signed_vma vdiff; | |
5585 | idx = (i + j) / 2; | |
14160578 | 5586 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
5587 | vdiff = vlook - h->root.u.def.value; |
5588 | if (vdiff < 0) | |
5589 | j = idx; | |
5590 | else if (vdiff > 0) | |
5591 | i = idx + 1; | |
5592 | else | |
5593 | { | |
d3435ae8 | 5594 | int sdiff = slook->id - h->root.u.def.section->id; |
4ad4eba5 AM |
5595 | if (sdiff < 0) |
5596 | j = idx; | |
5597 | else if (sdiff > 0) | |
5598 | i = idx + 1; | |
5599 | else | |
14160578 | 5600 | break; |
4ad4eba5 AM |
5601 | } |
5602 | } | |
5603 | ||
5604 | /* We didn't find a value/section match. */ | |
14160578 | 5605 | if (i == j) |
4ad4eba5 AM |
5606 | continue; |
5607 | ||
14160578 AM |
5608 | /* With multiple aliases, or when the weak symbol is already |
5609 | strongly defined, we have multiple matching symbols and | |
5610 | the binary search above may land on any of them. Step | |
5611 | one past the matching symbol(s). */ | |
5612 | while (++idx != j) | |
5613 | { | |
5614 | h = sorted_sym_hash[idx]; | |
5615 | if (h->root.u.def.section != slook | |
5616 | || h->root.u.def.value != vlook) | |
5617 | break; | |
5618 | } | |
5619 | ||
5620 | /* Now look back over the aliases. Since we sorted by size | |
5621 | as well as value and section, we'll choose the one with | |
5622 | the largest size. */ | |
5623 | while (idx-- != i) | |
4ad4eba5 | 5624 | { |
14160578 | 5625 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
5626 | |
5627 | /* Stop if value or section doesn't match. */ | |
14160578 AM |
5628 | if (h->root.u.def.section != slook |
5629 | || h->root.u.def.value != vlook) | |
4ad4eba5 AM |
5630 | break; |
5631 | else if (h != hlook) | |
5632 | { | |
60d67dc8 AM |
5633 | struct elf_link_hash_entry *t; |
5634 | ||
5635 | hlook->u.alias = h; | |
5636 | hlook->is_weakalias = 1; | |
5637 | t = h; | |
5638 | if (t->u.alias != NULL) | |
5639 | while (t->u.alias != h) | |
5640 | t = t->u.alias; | |
5641 | t->u.alias = hlook; | |
4ad4eba5 AM |
5642 | |
5643 | /* If the weak definition is in the list of dynamic | |
5644 | symbols, make sure the real definition is put | |
5645 | there as well. */ | |
5646 | if (hlook->dynindx != -1 && h->dynindx == -1) | |
5647 | { | |
c152c796 | 5648 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4dd07732 AM |
5649 | { |
5650 | err_free_sym_hash: | |
5651 | free (sorted_sym_hash); | |
5652 | goto error_return; | |
5653 | } | |
4ad4eba5 AM |
5654 | } |
5655 | ||
5656 | /* If the real definition is in the list of dynamic | |
5657 | symbols, make sure the weak definition is put | |
5658 | there as well. If we don't do this, then the | |
5659 | dynamic loader might not merge the entries for the | |
5660 | real definition and the weak definition. */ | |
5661 | if (h->dynindx != -1 && hlook->dynindx == -1) | |
5662 | { | |
c152c796 | 5663 | if (! bfd_elf_link_record_dynamic_symbol (info, hlook)) |
4dd07732 | 5664 | goto err_free_sym_hash; |
4ad4eba5 AM |
5665 | } |
5666 | break; | |
5667 | } | |
5668 | } | |
5669 | } | |
5670 | ||
5671 | free (sorted_sym_hash); | |
5672 | } | |
5673 | ||
33177bb1 AM |
5674 | if (bed->check_directives |
5675 | && !(*bed->check_directives) (abfd, info)) | |
0a1b45a2 | 5676 | return false; |
85fbca6a | 5677 | |
4ad4eba5 AM |
5678 | /* If this is a non-traditional link, try to optimize the handling |
5679 | of the .stab/.stabstr sections. */ | |
5680 | if (! dynamic | |
5681 | && ! info->traditional_format | |
2cc15b10 | 5682 | && is_elf_hash_table (&htab->root) |
4ad4eba5 AM |
5683 | && (info->strip != strip_all && info->strip != strip_debugger)) |
5684 | { | |
5685 | asection *stabstr; | |
5686 | ||
5687 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
5688 | if (stabstr != NULL) | |
5689 | { | |
5690 | bfd_size_type string_offset = 0; | |
5691 | asection *stab; | |
5692 | ||
5693 | for (stab = abfd->sections; stab; stab = stab->next) | |
08dedd66 | 5694 | if (startswith (stab->name, ".stab") |
4ad4eba5 AM |
5695 | && (!stab->name[5] || |
5696 | (stab->name[5] == '.' && ISDIGIT (stab->name[6]))) | |
5697 | && (stab->flags & SEC_MERGE) == 0 | |
5698 | && !bfd_is_abs_section (stab->output_section)) | |
5699 | { | |
5700 | struct bfd_elf_section_data *secdata; | |
5701 | ||
5702 | secdata = elf_section_data (stab); | |
66eb6687 AM |
5703 | if (! _bfd_link_section_stabs (abfd, &htab->stab_info, stab, |
5704 | stabstr, &secdata->sec_info, | |
4ad4eba5 AM |
5705 | &string_offset)) |
5706 | goto error_return; | |
5707 | if (secdata->sec_info) | |
dbaa2011 | 5708 | stab->sec_info_type = SEC_INFO_TYPE_STABS; |
4ad4eba5 AM |
5709 | } |
5710 | } | |
5711 | } | |
5712 | ||
e310298c | 5713 | if (dynamic && add_needed) |
4ad4eba5 AM |
5714 | { |
5715 | /* Add this bfd to the loaded list. */ | |
5716 | struct elf_link_loaded_list *n; | |
5717 | ||
ca4be51c | 5718 | n = (struct elf_link_loaded_list *) bfd_alloc (abfd, sizeof (*n)); |
4ad4eba5 AM |
5719 | if (n == NULL) |
5720 | goto error_return; | |
5721 | n->abfd = abfd; | |
e310298c AM |
5722 | n->next = htab->dyn_loaded; |
5723 | htab->dyn_loaded = n; | |
4ad4eba5 | 5724 | } |
e310298c AM |
5725 | if (dynamic && !add_needed |
5726 | && (elf_dyn_lib_class (abfd) & DYN_DT_NEEDED) != 0) | |
5727 | elf_dyn_lib_class (abfd) |= DYN_NO_NEEDED; | |
4ad4eba5 | 5728 | |
0a1b45a2 | 5729 | return true; |
4ad4eba5 AM |
5730 | |
5731 | error_free_vers: | |
c9594989 AM |
5732 | free (old_tab); |
5733 | free (old_strtab); | |
5734 | free (nondeflt_vers); | |
5735 | free (extversym); | |
4ad4eba5 | 5736 | error_free_sym: |
c9594989 | 5737 | free (isymbuf); |
4ad4eba5 | 5738 | error_return: |
0a1b45a2 | 5739 | return false; |
4ad4eba5 AM |
5740 | } |
5741 | ||
8387904d AM |
5742 | /* Return the linker hash table entry of a symbol that might be |
5743 | satisfied by an archive symbol. Return -1 on error. */ | |
5744 | ||
b585e899 | 5745 | struct bfd_link_hash_entry * |
8387904d AM |
5746 | _bfd_elf_archive_symbol_lookup (bfd *abfd, |
5747 | struct bfd_link_info *info, | |
5748 | const char *name) | |
5749 | { | |
b585e899 | 5750 | struct bfd_link_hash_entry *h; |
8387904d AM |
5751 | char *p, *copy; |
5752 | size_t len, first; | |
5753 | ||
b585e899 | 5754 | h = bfd_link_hash_lookup (info->hash, name, false, false, true); |
8387904d AM |
5755 | if (h != NULL) |
5756 | return h; | |
5757 | ||
5758 | /* If this is a default version (the name contains @@), look up the | |
5759 | symbol again with only one `@' as well as without the version. | |
5760 | The effect is that references to the symbol with and without the | |
5761 | version will be matched by the default symbol in the archive. */ | |
5762 | ||
5763 | p = strchr (name, ELF_VER_CHR); | |
5764 | if (p == NULL || p[1] != ELF_VER_CHR) | |
5765 | return h; | |
5766 | ||
5767 | /* First check with only one `@'. */ | |
5768 | len = strlen (name); | |
a50b1753 | 5769 | copy = (char *) bfd_alloc (abfd, len); |
8387904d | 5770 | if (copy == NULL) |
b585e899 | 5771 | return (struct bfd_link_hash_entry *) -1; |
8387904d AM |
5772 | |
5773 | first = p - name + 1; | |
5774 | memcpy (copy, name, first); | |
5775 | memcpy (copy + first, name + first + 1, len - first); | |
5776 | ||
b585e899 | 5777 | h = bfd_link_hash_lookup (info->hash, copy, false, false, true); |
8387904d AM |
5778 | if (h == NULL) |
5779 | { | |
5780 | /* We also need to check references to the symbol without the | |
5781 | version. */ | |
5782 | copy[first - 1] = '\0'; | |
b585e899 | 5783 | h = bfd_link_hash_lookup (info->hash, copy, false, false, true); |
8387904d AM |
5784 | } |
5785 | ||
5786 | bfd_release (abfd, copy); | |
5787 | return h; | |
5788 | } | |
5789 | ||
0ad989f9 | 5790 | /* Add symbols from an ELF archive file to the linker hash table. We |
13e570f8 AM |
5791 | don't use _bfd_generic_link_add_archive_symbols because we need to |
5792 | handle versioned symbols. | |
0ad989f9 L |
5793 | |
5794 | Fortunately, ELF archive handling is simpler than that done by | |
5795 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
5796 | oddities. In ELF, if we find a symbol in the archive map, and the | |
5797 | symbol is currently undefined, we know that we must pull in that | |
5798 | object file. | |
5799 | ||
5800 | Unfortunately, we do have to make multiple passes over the symbol | |
5801 | table until nothing further is resolved. */ | |
5802 | ||
0a1b45a2 | 5803 | static bool |
4ad4eba5 | 5804 | elf_link_add_archive_symbols (bfd *abfd, struct bfd_link_info *info) |
0ad989f9 L |
5805 | { |
5806 | symindex c; | |
13e570f8 | 5807 | unsigned char *included = NULL; |
0ad989f9 | 5808 | carsym *symdefs; |
0a1b45a2 | 5809 | bool loop; |
986f0783 | 5810 | size_t amt; |
8387904d | 5811 | const struct elf_backend_data *bed; |
b585e899 | 5812 | struct bfd_link_hash_entry * (*archive_symbol_lookup) |
8387904d | 5813 | (bfd *, struct bfd_link_info *, const char *); |
0ad989f9 L |
5814 | |
5815 | if (! bfd_has_map (abfd)) | |
5816 | { | |
5817 | /* An empty archive is a special case. */ | |
5818 | if (bfd_openr_next_archived_file (abfd, NULL) == NULL) | |
0a1b45a2 | 5819 | return true; |
0ad989f9 | 5820 | bfd_set_error (bfd_error_no_armap); |
0a1b45a2 | 5821 | return false; |
0ad989f9 L |
5822 | } |
5823 | ||
5824 | /* Keep track of all symbols we know to be already defined, and all | |
5825 | files we know to be already included. This is to speed up the | |
5826 | second and subsequent passes. */ | |
5827 | c = bfd_ardata (abfd)->symdef_count; | |
5828 | if (c == 0) | |
0a1b45a2 | 5829 | return true; |
986f0783 | 5830 | amt = c * sizeof (*included); |
13e570f8 AM |
5831 | included = (unsigned char *) bfd_zmalloc (amt); |
5832 | if (included == NULL) | |
0a1b45a2 | 5833 | return false; |
0ad989f9 L |
5834 | |
5835 | symdefs = bfd_ardata (abfd)->symdefs; | |
8387904d AM |
5836 | bed = get_elf_backend_data (abfd); |
5837 | archive_symbol_lookup = bed->elf_backend_archive_symbol_lookup; | |
0ad989f9 L |
5838 | |
5839 | do | |
5840 | { | |
5841 | file_ptr last; | |
5842 | symindex i; | |
5843 | carsym *symdef; | |
5844 | carsym *symdefend; | |
5845 | ||
0a1b45a2 | 5846 | loop = false; |
0ad989f9 L |
5847 | last = -1; |
5848 | ||
5849 | symdef = symdefs; | |
5850 | symdefend = symdef + c; | |
5851 | for (i = 0; symdef < symdefend; symdef++, i++) | |
5852 | { | |
b585e899 | 5853 | struct bfd_link_hash_entry *h; |
0ad989f9 L |
5854 | bfd *element; |
5855 | struct bfd_link_hash_entry *undefs_tail; | |
5856 | symindex mark; | |
5857 | ||
13e570f8 | 5858 | if (included[i]) |
0ad989f9 L |
5859 | continue; |
5860 | if (symdef->file_offset == last) | |
5861 | { | |
0a1b45a2 | 5862 | included[i] = true; |
0ad989f9 L |
5863 | continue; |
5864 | } | |
5865 | ||
8387904d | 5866 | h = archive_symbol_lookup (abfd, info, symdef->name); |
b585e899 | 5867 | if (h == (struct bfd_link_hash_entry *) -1) |
8387904d | 5868 | goto error_return; |
0ad989f9 L |
5869 | |
5870 | if (h == NULL) | |
5871 | continue; | |
5872 | ||
b585e899 | 5873 | if (h->type == bfd_link_hash_undefined) |
75cfe082 AM |
5874 | { |
5875 | /* If the archive element has already been loaded then one | |
5876 | of the symbols defined by that element might have been | |
5877 | made undefined due to being in a discarded section. */ | |
b585e899 AM |
5878 | if (is_elf_hash_table (info->hash) |
5879 | && ((struct elf_link_hash_entry *) h)->indx == -3) | |
75cfe082 AM |
5880 | continue; |
5881 | } | |
b585e899 | 5882 | else if (h->type == bfd_link_hash_common) |
0ad989f9 L |
5883 | { |
5884 | /* We currently have a common symbol. The archive map contains | |
5885 | a reference to this symbol, so we may want to include it. We | |
5886 | only want to include it however, if this archive element | |
5887 | contains a definition of the symbol, not just another common | |
5888 | declaration of it. | |
5889 | ||
5890 | Unfortunately some archivers (including GNU ar) will put | |
5891 | declarations of common symbols into their archive maps, as | |
5892 | well as real definitions, so we cannot just go by the archive | |
5893 | map alone. Instead we must read in the element's symbol | |
5894 | table and check that to see what kind of symbol definition | |
5895 | this is. */ | |
5896 | if (! elf_link_is_defined_archive_symbol (abfd, symdef)) | |
5897 | continue; | |
5898 | } | |
75cfe082 | 5899 | else |
0ad989f9 | 5900 | { |
b585e899 | 5901 | if (h->type != bfd_link_hash_undefweak) |
13e570f8 | 5902 | /* Symbol must be defined. Don't check it again. */ |
0a1b45a2 | 5903 | included[i] = true; |
0ad989f9 L |
5904 | continue; |
5905 | } | |
5906 | ||
5907 | /* We need to include this archive member. */ | |
5908 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
5909 | if (element == NULL) | |
5910 | goto error_return; | |
5911 | ||
5912 | if (! bfd_check_format (element, bfd_object)) | |
5913 | goto error_return; | |
5914 | ||
0ad989f9 L |
5915 | undefs_tail = info->hash->undefs_tail; |
5916 | ||
0e144ba7 AM |
5917 | if (!(*info->callbacks |
5918 | ->add_archive_element) (info, element, symdef->name, &element)) | |
b95a0a31 | 5919 | continue; |
0e144ba7 | 5920 | if (!bfd_link_add_symbols (element, info)) |
0ad989f9 L |
5921 | goto error_return; |
5922 | ||
5923 | /* If there are any new undefined symbols, we need to make | |
5924 | another pass through the archive in order to see whether | |
5925 | they can be defined. FIXME: This isn't perfect, because | |
5926 | common symbols wind up on undefs_tail and because an | |
5927 | undefined symbol which is defined later on in this pass | |
5928 | does not require another pass. This isn't a bug, but it | |
5929 | does make the code less efficient than it could be. */ | |
5930 | if (undefs_tail != info->hash->undefs_tail) | |
0a1b45a2 | 5931 | loop = true; |
0ad989f9 L |
5932 | |
5933 | /* Look backward to mark all symbols from this object file | |
5934 | which we have already seen in this pass. */ | |
5935 | mark = i; | |
5936 | do | |
5937 | { | |
0a1b45a2 | 5938 | included[mark] = true; |
0ad989f9 L |
5939 | if (mark == 0) |
5940 | break; | |
5941 | --mark; | |
5942 | } | |
5943 | while (symdefs[mark].file_offset == symdef->file_offset); | |
5944 | ||
5945 | /* We mark subsequent symbols from this object file as we go | |
5946 | on through the loop. */ | |
5947 | last = symdef->file_offset; | |
5948 | } | |
5949 | } | |
5950 | while (loop); | |
5951 | ||
0ad989f9 | 5952 | free (included); |
0a1b45a2 | 5953 | return true; |
0ad989f9 L |
5954 | |
5955 | error_return: | |
c9594989 | 5956 | free (included); |
0a1b45a2 | 5957 | return false; |
0ad989f9 | 5958 | } |
4ad4eba5 AM |
5959 | |
5960 | /* Given an ELF BFD, add symbols to the global hash table as | |
5961 | appropriate. */ | |
5962 | ||
0a1b45a2 | 5963 | bool |
4ad4eba5 AM |
5964 | bfd_elf_link_add_symbols (bfd *abfd, struct bfd_link_info *info) |
5965 | { | |
5966 | switch (bfd_get_format (abfd)) | |
5967 | { | |
5968 | case bfd_object: | |
5969 | return elf_link_add_object_symbols (abfd, info); | |
5970 | case bfd_archive: | |
5971 | return elf_link_add_archive_symbols (abfd, info); | |
5972 | default: | |
5973 | bfd_set_error (bfd_error_wrong_format); | |
0a1b45a2 | 5974 | return false; |
4ad4eba5 AM |
5975 | } |
5976 | } | |
5a580b3a | 5977 | \f |
14b1c01e AM |
5978 | struct hash_codes_info |
5979 | { | |
5980 | unsigned long *hashcodes; | |
0a1b45a2 | 5981 | bool error; |
14b1c01e | 5982 | }; |
a0c8462f | 5983 | |
5a580b3a AM |
5984 | /* This function will be called though elf_link_hash_traverse to store |
5985 | all hash value of the exported symbols in an array. */ | |
5986 | ||
0a1b45a2 | 5987 | static bool |
5a580b3a AM |
5988 | elf_collect_hash_codes (struct elf_link_hash_entry *h, void *data) |
5989 | { | |
a50b1753 | 5990 | struct hash_codes_info *inf = (struct hash_codes_info *) data; |
5a580b3a | 5991 | const char *name; |
5a580b3a AM |
5992 | unsigned long ha; |
5993 | char *alc = NULL; | |
5994 | ||
5a580b3a AM |
5995 | /* Ignore indirect symbols. These are added by the versioning code. */ |
5996 | if (h->dynindx == -1) | |
0a1b45a2 | 5997 | return true; |
5a580b3a AM |
5998 | |
5999 | name = h->root.root.string; | |
422f1182 | 6000 | if (h->versioned >= versioned) |
5a580b3a | 6001 | { |
422f1182 L |
6002 | char *p = strchr (name, ELF_VER_CHR); |
6003 | if (p != NULL) | |
14b1c01e | 6004 | { |
422f1182 L |
6005 | alc = (char *) bfd_malloc (p - name + 1); |
6006 | if (alc == NULL) | |
6007 | { | |
0a1b45a2 AM |
6008 | inf->error = true; |
6009 | return false; | |
422f1182 L |
6010 | } |
6011 | memcpy (alc, name, p - name); | |
6012 | alc[p - name] = '\0'; | |
6013 | name = alc; | |
14b1c01e | 6014 | } |
5a580b3a AM |
6015 | } |
6016 | ||
6017 | /* Compute the hash value. */ | |
6018 | ha = bfd_elf_hash (name); | |
6019 | ||
6020 | /* Store the found hash value in the array given as the argument. */ | |
14b1c01e | 6021 | *(inf->hashcodes)++ = ha; |
5a580b3a AM |
6022 | |
6023 | /* And store it in the struct so that we can put it in the hash table | |
6024 | later. */ | |
f6e332e6 | 6025 | h->u.elf_hash_value = ha; |
5a580b3a | 6026 | |
c9594989 | 6027 | free (alc); |
0a1b45a2 | 6028 | return true; |
5a580b3a AM |
6029 | } |
6030 | ||
fdc90cb4 JJ |
6031 | struct collect_gnu_hash_codes |
6032 | { | |
6033 | bfd *output_bfd; | |
6034 | const struct elf_backend_data *bed; | |
6035 | unsigned long int nsyms; | |
6036 | unsigned long int maskbits; | |
6037 | unsigned long int *hashcodes; | |
6038 | unsigned long int *hashval; | |
6039 | unsigned long int *indx; | |
6040 | unsigned long int *counts; | |
6041 | bfd_vma *bitmask; | |
6042 | bfd_byte *contents; | |
f16a9783 | 6043 | bfd_size_type xlat; |
fdc90cb4 JJ |
6044 | long int min_dynindx; |
6045 | unsigned long int bucketcount; | |
6046 | unsigned long int symindx; | |
6047 | long int local_indx; | |
6048 | long int shift1, shift2; | |
6049 | unsigned long int mask; | |
0a1b45a2 | 6050 | bool error; |
fdc90cb4 JJ |
6051 | }; |
6052 | ||
6053 | /* This function will be called though elf_link_hash_traverse to store | |
6054 | all hash value of the exported symbols in an array. */ | |
6055 | ||
0a1b45a2 | 6056 | static bool |
fdc90cb4 JJ |
6057 | elf_collect_gnu_hash_codes (struct elf_link_hash_entry *h, void *data) |
6058 | { | |
a50b1753 | 6059 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 | 6060 | const char *name; |
fdc90cb4 JJ |
6061 | unsigned long ha; |
6062 | char *alc = NULL; | |
6063 | ||
fdc90cb4 JJ |
6064 | /* Ignore indirect symbols. These are added by the versioning code. */ |
6065 | if (h->dynindx == -1) | |
0a1b45a2 | 6066 | return true; |
fdc90cb4 JJ |
6067 | |
6068 | /* Ignore also local symbols and undefined symbols. */ | |
6069 | if (! (*s->bed->elf_hash_symbol) (h)) | |
0a1b45a2 | 6070 | return true; |
fdc90cb4 JJ |
6071 | |
6072 | name = h->root.root.string; | |
422f1182 | 6073 | if (h->versioned >= versioned) |
fdc90cb4 | 6074 | { |
422f1182 L |
6075 | char *p = strchr (name, ELF_VER_CHR); |
6076 | if (p != NULL) | |
14b1c01e | 6077 | { |
422f1182 L |
6078 | alc = (char *) bfd_malloc (p - name + 1); |
6079 | if (alc == NULL) | |
6080 | { | |
0a1b45a2 AM |
6081 | s->error = true; |
6082 | return false; | |
422f1182 L |
6083 | } |
6084 | memcpy (alc, name, p - name); | |
6085 | alc[p - name] = '\0'; | |
6086 | name = alc; | |
14b1c01e | 6087 | } |
fdc90cb4 JJ |
6088 | } |
6089 | ||
6090 | /* Compute the hash value. */ | |
6091 | ha = bfd_elf_gnu_hash (name); | |
6092 | ||
6093 | /* Store the found hash value in the array for compute_bucket_count, | |
6094 | and also for .dynsym reordering purposes. */ | |
6095 | s->hashcodes[s->nsyms] = ha; | |
6096 | s->hashval[h->dynindx] = ha; | |
6097 | ++s->nsyms; | |
6098 | if (s->min_dynindx < 0 || s->min_dynindx > h->dynindx) | |
6099 | s->min_dynindx = h->dynindx; | |
6100 | ||
c9594989 | 6101 | free (alc); |
0a1b45a2 | 6102 | return true; |
fdc90cb4 JJ |
6103 | } |
6104 | ||
6105 | /* This function will be called though elf_link_hash_traverse to do | |
f16a9783 MS |
6106 | final dynamic symbol renumbering in case of .gnu.hash. |
6107 | If using .MIPS.xhash, invoke record_xhash_symbol to add symbol index | |
6108 | to the translation table. */ | |
fdc90cb4 | 6109 | |
0a1b45a2 | 6110 | static bool |
f16a9783 | 6111 | elf_gnu_hash_process_symidx (struct elf_link_hash_entry *h, void *data) |
fdc90cb4 | 6112 | { |
a50b1753 | 6113 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 JJ |
6114 | unsigned long int bucket; |
6115 | unsigned long int val; | |
6116 | ||
fdc90cb4 JJ |
6117 | /* Ignore indirect symbols. */ |
6118 | if (h->dynindx == -1) | |
0a1b45a2 | 6119 | return true; |
fdc90cb4 JJ |
6120 | |
6121 | /* Ignore also local symbols and undefined symbols. */ | |
6122 | if (! (*s->bed->elf_hash_symbol) (h)) | |
6123 | { | |
6124 | if (h->dynindx >= s->min_dynindx) | |
f16a9783 MS |
6125 | { |
6126 | if (s->bed->record_xhash_symbol != NULL) | |
6127 | { | |
6128 | (*s->bed->record_xhash_symbol) (h, 0); | |
6129 | s->local_indx++; | |
6130 | } | |
6131 | else | |
6132 | h->dynindx = s->local_indx++; | |
6133 | } | |
0a1b45a2 | 6134 | return true; |
fdc90cb4 JJ |
6135 | } |
6136 | ||
6137 | bucket = s->hashval[h->dynindx] % s->bucketcount; | |
6138 | val = (s->hashval[h->dynindx] >> s->shift1) | |
6139 | & ((s->maskbits >> s->shift1) - 1); | |
6140 | s->bitmask[val] |= ((bfd_vma) 1) << (s->hashval[h->dynindx] & s->mask); | |
6141 | s->bitmask[val] | |
6142 | |= ((bfd_vma) 1) << ((s->hashval[h->dynindx] >> s->shift2) & s->mask); | |
6143 | val = s->hashval[h->dynindx] & ~(unsigned long int) 1; | |
6144 | if (s->counts[bucket] == 1) | |
6145 | /* Last element terminates the chain. */ | |
6146 | val |= 1; | |
6147 | bfd_put_32 (s->output_bfd, val, | |
6148 | s->contents + (s->indx[bucket] - s->symindx) * 4); | |
6149 | --s->counts[bucket]; | |
f16a9783 MS |
6150 | if (s->bed->record_xhash_symbol != NULL) |
6151 | { | |
6152 | bfd_vma xlat_loc = s->xlat + (s->indx[bucket]++ - s->symindx) * 4; | |
6153 | ||
6154 | (*s->bed->record_xhash_symbol) (h, xlat_loc); | |
6155 | } | |
6156 | else | |
6157 | h->dynindx = s->indx[bucket]++; | |
0a1b45a2 | 6158 | return true; |
fdc90cb4 JJ |
6159 | } |
6160 | ||
6161 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ | |
6162 | ||
0a1b45a2 | 6163 | bool |
fdc90cb4 JJ |
6164 | _bfd_elf_hash_symbol (struct elf_link_hash_entry *h) |
6165 | { | |
6166 | return !(h->forced_local | |
6167 | || h->root.type == bfd_link_hash_undefined | |
6168 | || h->root.type == bfd_link_hash_undefweak | |
6169 | || ((h->root.type == bfd_link_hash_defined | |
6170 | || h->root.type == bfd_link_hash_defweak) | |
6171 | && h->root.u.def.section->output_section == NULL)); | |
6172 | } | |
6173 | ||
5a580b3a AM |
6174 | /* Array used to determine the number of hash table buckets to use |
6175 | based on the number of symbols there are. If there are fewer than | |
6176 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
6177 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
6178 | than 32771 buckets. */ | |
6179 | ||
6180 | static const size_t elf_buckets[] = | |
6181 | { | |
6182 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, | |
6183 | 16411, 32771, 0 | |
6184 | }; | |
6185 | ||
6186 | /* Compute bucket count for hashing table. We do not use a static set | |
6187 | of possible tables sizes anymore. Instead we determine for all | |
6188 | possible reasonable sizes of the table the outcome (i.e., the | |
6189 | number of collisions etc) and choose the best solution. The | |
6190 | weighting functions are not too simple to allow the table to grow | |
6191 | without bounds. Instead one of the weighting factors is the size. | |
6192 | Therefore the result is always a good payoff between few collisions | |
6193 | (= short chain lengths) and table size. */ | |
6194 | static size_t | |
b20dd2ce | 6195 | compute_bucket_count (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
d40f3da9 AM |
6196 | unsigned long int *hashcodes ATTRIBUTE_UNUSED, |
6197 | unsigned long int nsyms, | |
6198 | int gnu_hash) | |
5a580b3a | 6199 | { |
5a580b3a | 6200 | size_t best_size = 0; |
5a580b3a | 6201 | unsigned long int i; |
5a580b3a | 6202 | |
5a580b3a AM |
6203 | /* We have a problem here. The following code to optimize the table |
6204 | size requires an integer type with more the 32 bits. If | |
6205 | BFD_HOST_U_64_BIT is set we know about such a type. */ | |
6206 | #ifdef BFD_HOST_U_64_BIT | |
6207 | if (info->optimize) | |
6208 | { | |
5a580b3a AM |
6209 | size_t minsize; |
6210 | size_t maxsize; | |
6211 | BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0); | |
5a580b3a | 6212 | bfd *dynobj = elf_hash_table (info)->dynobj; |
d40f3da9 | 6213 | size_t dynsymcount = elf_hash_table (info)->dynsymcount; |
5a580b3a | 6214 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); |
fdc90cb4 | 6215 | unsigned long int *counts; |
d40f3da9 | 6216 | bfd_size_type amt; |
0883b6e0 | 6217 | unsigned int no_improvement_count = 0; |
5a580b3a AM |
6218 | |
6219 | /* Possible optimization parameters: if we have NSYMS symbols we say | |
6220 | that the hashing table must at least have NSYMS/4 and at most | |
6221 | 2*NSYMS buckets. */ | |
6222 | minsize = nsyms / 4; | |
6223 | if (minsize == 0) | |
6224 | minsize = 1; | |
6225 | best_size = maxsize = nsyms * 2; | |
fdc90cb4 JJ |
6226 | if (gnu_hash) |
6227 | { | |
6228 | if (minsize < 2) | |
6229 | minsize = 2; | |
6230 | if ((best_size & 31) == 0) | |
6231 | ++best_size; | |
6232 | } | |
5a580b3a AM |
6233 | |
6234 | /* Create array where we count the collisions in. We must use bfd_malloc | |
6235 | since the size could be large. */ | |
6236 | amt = maxsize; | |
6237 | amt *= sizeof (unsigned long int); | |
a50b1753 | 6238 | counts = (unsigned long int *) bfd_malloc (amt); |
5a580b3a | 6239 | if (counts == NULL) |
fdc90cb4 | 6240 | return 0; |
5a580b3a AM |
6241 | |
6242 | /* Compute the "optimal" size for the hash table. The criteria is a | |
6243 | minimal chain length. The minor criteria is (of course) the size | |
6244 | of the table. */ | |
6245 | for (i = minsize; i < maxsize; ++i) | |
6246 | { | |
6247 | /* Walk through the array of hashcodes and count the collisions. */ | |
6248 | BFD_HOST_U_64_BIT max; | |
6249 | unsigned long int j; | |
6250 | unsigned long int fact; | |
6251 | ||
fdc90cb4 JJ |
6252 | if (gnu_hash && (i & 31) == 0) |
6253 | continue; | |
6254 | ||
5a580b3a AM |
6255 | memset (counts, '\0', i * sizeof (unsigned long int)); |
6256 | ||
6257 | /* Determine how often each hash bucket is used. */ | |
6258 | for (j = 0; j < nsyms; ++j) | |
6259 | ++counts[hashcodes[j] % i]; | |
6260 | ||
6261 | /* For the weight function we need some information about the | |
6262 | pagesize on the target. This is information need not be 100% | |
6263 | accurate. Since this information is not available (so far) we | |
6264 | define it here to a reasonable default value. If it is crucial | |
6265 | to have a better value some day simply define this value. */ | |
6266 | # ifndef BFD_TARGET_PAGESIZE | |
6267 | # define BFD_TARGET_PAGESIZE (4096) | |
6268 | # endif | |
6269 | ||
fdc90cb4 JJ |
6270 | /* We in any case need 2 + DYNSYMCOUNT entries for the size values |
6271 | and the chains. */ | |
6272 | max = (2 + dynsymcount) * bed->s->sizeof_hash_entry; | |
5a580b3a AM |
6273 | |
6274 | # if 1 | |
6275 | /* Variant 1: optimize for short chains. We add the squares | |
6276 | of all the chain lengths (which favors many small chain | |
6277 | over a few long chains). */ | |
6278 | for (j = 0; j < i; ++j) | |
6279 | max += counts[j] * counts[j]; | |
6280 | ||
6281 | /* This adds penalties for the overall size of the table. */ | |
fdc90cb4 | 6282 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
6283 | max *= fact * fact; |
6284 | # else | |
6285 | /* Variant 2: Optimize a lot more for small table. Here we | |
6286 | also add squares of the size but we also add penalties for | |
6287 | empty slots (the +1 term). */ | |
6288 | for (j = 0; j < i; ++j) | |
6289 | max += (1 + counts[j]) * (1 + counts[j]); | |
6290 | ||
6291 | /* The overall size of the table is considered, but not as | |
6292 | strong as in variant 1, where it is squared. */ | |
fdc90cb4 | 6293 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
6294 | max *= fact; |
6295 | # endif | |
6296 | ||
6297 | /* Compare with current best results. */ | |
6298 | if (max < best_chlen) | |
6299 | { | |
6300 | best_chlen = max; | |
6301 | best_size = i; | |
ca4be51c | 6302 | no_improvement_count = 0; |
5a580b3a | 6303 | } |
0883b6e0 NC |
6304 | /* PR 11843: Avoid futile long searches for the best bucket size |
6305 | when there are a large number of symbols. */ | |
6306 | else if (++no_improvement_count == 100) | |
6307 | break; | |
5a580b3a AM |
6308 | } |
6309 | ||
6310 | free (counts); | |
6311 | } | |
6312 | else | |
6313 | #endif /* defined (BFD_HOST_U_64_BIT) */ | |
6314 | { | |
6315 | /* This is the fallback solution if no 64bit type is available or if we | |
6316 | are not supposed to spend much time on optimizations. We select the | |
6317 | bucket count using a fixed set of numbers. */ | |
6318 | for (i = 0; elf_buckets[i] != 0; i++) | |
6319 | { | |
6320 | best_size = elf_buckets[i]; | |
fdc90cb4 | 6321 | if (nsyms < elf_buckets[i + 1]) |
5a580b3a AM |
6322 | break; |
6323 | } | |
fdc90cb4 JJ |
6324 | if (gnu_hash && best_size < 2) |
6325 | best_size = 2; | |
5a580b3a AM |
6326 | } |
6327 | ||
5a580b3a AM |
6328 | return best_size; |
6329 | } | |
6330 | ||
d0bf826b AM |
6331 | /* Size any SHT_GROUP section for ld -r. */ |
6332 | ||
0a1b45a2 | 6333 | bool |
d0bf826b AM |
6334 | _bfd_elf_size_group_sections (struct bfd_link_info *info) |
6335 | { | |
6336 | bfd *ibfd; | |
57963c05 | 6337 | asection *s; |
d0bf826b | 6338 | |
c72f2fb2 | 6339 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
d0bf826b | 6340 | if (bfd_get_flavour (ibfd) == bfd_target_elf_flavour |
57963c05 AM |
6341 | && (s = ibfd->sections) != NULL |
6342 | && s->sec_info_type != SEC_INFO_TYPE_JUST_SYMS | |
d0bf826b | 6343 | && !_bfd_elf_fixup_group_sections (ibfd, bfd_abs_section_ptr)) |
0a1b45a2 AM |
6344 | return false; |
6345 | return true; | |
d0bf826b AM |
6346 | } |
6347 | ||
04c3a755 NS |
6348 | /* Set a default stack segment size. The value in INFO wins. If it |
6349 | is unset, LEGACY_SYMBOL's value is used, and if that symbol is | |
6350 | undefined it is initialized. */ | |
6351 | ||
0a1b45a2 | 6352 | bool |
04c3a755 NS |
6353 | bfd_elf_stack_segment_size (bfd *output_bfd, |
6354 | struct bfd_link_info *info, | |
6355 | const char *legacy_symbol, | |
6356 | bfd_vma default_size) | |
6357 | { | |
6358 | struct elf_link_hash_entry *h = NULL; | |
6359 | ||
6360 | /* Look for legacy symbol. */ | |
6361 | if (legacy_symbol) | |
6362 | h = elf_link_hash_lookup (elf_hash_table (info), legacy_symbol, | |
0a1b45a2 | 6363 | false, false, false); |
04c3a755 NS |
6364 | if (h && (h->root.type == bfd_link_hash_defined |
6365 | || h->root.type == bfd_link_hash_defweak) | |
6366 | && h->def_regular | |
6367 | && (h->type == STT_NOTYPE || h->type == STT_OBJECT)) | |
6368 | { | |
6369 | /* The symbol has no type if specified on the command line. */ | |
6370 | h->type = STT_OBJECT; | |
6371 | if (info->stacksize) | |
695344c0 | 6372 | /* xgettext:c-format */ |
871b3ab2 | 6373 | _bfd_error_handler (_("%pB: stack size specified and %s set"), |
4eca0228 | 6374 | output_bfd, legacy_symbol); |
04c3a755 | 6375 | else if (h->root.u.def.section != bfd_abs_section_ptr) |
695344c0 | 6376 | /* xgettext:c-format */ |
871b3ab2 | 6377 | _bfd_error_handler (_("%pB: %s not absolute"), |
4eca0228 | 6378 | output_bfd, legacy_symbol); |
04c3a755 NS |
6379 | else |
6380 | info->stacksize = h->root.u.def.value; | |
6381 | } | |
6382 | ||
6383 | if (!info->stacksize) | |
6384 | /* If the user didn't set a size, or explicitly inhibit the | |
6385 | size, set it now. */ | |
6386 | info->stacksize = default_size; | |
6387 | ||
6388 | /* Provide the legacy symbol, if it is referenced. */ | |
6389 | if (h && (h->root.type == bfd_link_hash_undefined | |
6390 | || h->root.type == bfd_link_hash_undefweak)) | |
6391 | { | |
6392 | struct bfd_link_hash_entry *bh = NULL; | |
6393 | ||
6394 | if (!(_bfd_generic_link_add_one_symbol | |
6395 | (info, output_bfd, legacy_symbol, | |
6396 | BSF_GLOBAL, bfd_abs_section_ptr, | |
6397 | info->stacksize >= 0 ? info->stacksize : 0, | |
0a1b45a2 AM |
6398 | NULL, false, get_elf_backend_data (output_bfd)->collect, &bh))) |
6399 | return false; | |
04c3a755 NS |
6400 | |
6401 | h = (struct elf_link_hash_entry *) bh; | |
6402 | h->def_regular = 1; | |
6403 | h->type = STT_OBJECT; | |
6404 | } | |
6405 | ||
0a1b45a2 | 6406 | return true; |
04c3a755 NS |
6407 | } |
6408 | ||
b531344c MR |
6409 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ |
6410 | ||
6411 | struct elf_gc_sweep_symbol_info | |
6412 | { | |
6413 | struct bfd_link_info *info; | |
6414 | void (*hide_symbol) (struct bfd_link_info *, struct elf_link_hash_entry *, | |
0a1b45a2 | 6415 | bool); |
b531344c MR |
6416 | }; |
6417 | ||
0a1b45a2 | 6418 | static bool |
b531344c MR |
6419 | elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *data) |
6420 | { | |
6421 | if (!h->mark | |
6422 | && (((h->root.type == bfd_link_hash_defined | |
6423 | || h->root.type == bfd_link_hash_defweak) | |
6424 | && !((h->def_regular || ELF_COMMON_DEF_P (h)) | |
6425 | && h->root.u.def.section->gc_mark)) | |
6426 | || h->root.type == bfd_link_hash_undefined | |
6427 | || h->root.type == bfd_link_hash_undefweak)) | |
6428 | { | |
6429 | struct elf_gc_sweep_symbol_info *inf; | |
6430 | ||
6431 | inf = (struct elf_gc_sweep_symbol_info *) data; | |
0a1b45a2 | 6432 | (*inf->hide_symbol) (inf->info, h, true); |
b531344c MR |
6433 | h->def_regular = 0; |
6434 | h->ref_regular = 0; | |
6435 | h->ref_regular_nonweak = 0; | |
6436 | } | |
6437 | ||
0a1b45a2 | 6438 | return true; |
b531344c MR |
6439 | } |
6440 | ||
5a580b3a AM |
6441 | /* Set up the sizes and contents of the ELF dynamic sections. This is |
6442 | called by the ELF linker emulation before_allocation routine. We | |
6443 | must set the sizes of the sections before the linker sets the | |
6444 | addresses of the various sections. */ | |
6445 | ||
0a1b45a2 | 6446 | bool |
5a580b3a AM |
6447 | bfd_elf_size_dynamic_sections (bfd *output_bfd, |
6448 | const char *soname, | |
6449 | const char *rpath, | |
6450 | const char *filter_shlib, | |
7ee314fa AM |
6451 | const char *audit, |
6452 | const char *depaudit, | |
5a580b3a AM |
6453 | const char * const *auxiliary_filters, |
6454 | struct bfd_link_info *info, | |
fd91d419 | 6455 | asection **sinterpptr) |
5a580b3a | 6456 | { |
5a580b3a AM |
6457 | bfd *dynobj; |
6458 | const struct elf_backend_data *bed; | |
5a580b3a AM |
6459 | |
6460 | *sinterpptr = NULL; | |
6461 | ||
5a580b3a | 6462 | if (!is_elf_hash_table (info->hash)) |
0a1b45a2 | 6463 | return true; |
5a580b3a | 6464 | |
5a580b3a AM |
6465 | dynobj = elf_hash_table (info)->dynobj; |
6466 | ||
9a2a56cc | 6467 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) |
5a580b3a | 6468 | { |
902e9fc7 MR |
6469 | struct bfd_elf_version_tree *verdefs; |
6470 | struct elf_info_failed asvinfo; | |
5a580b3a AM |
6471 | struct bfd_elf_version_tree *t; |
6472 | struct bfd_elf_version_expr *d; | |
902e9fc7 | 6473 | asection *s; |
e6699019 | 6474 | size_t soname_indx; |
7ee314fa | 6475 | |
5a580b3a AM |
6476 | /* If we are supposed to export all symbols into the dynamic symbol |
6477 | table (this is not the normal case), then do so. */ | |
55255dae | 6478 | if (info->export_dynamic |
0e1862bb | 6479 | || (bfd_link_executable (info) && info->dynamic)) |
5a580b3a | 6480 | { |
3d13f3e9 AM |
6481 | struct elf_info_failed eif; |
6482 | ||
6483 | eif.info = info; | |
0a1b45a2 | 6484 | eif.failed = false; |
5a580b3a AM |
6485 | elf_link_hash_traverse (elf_hash_table (info), |
6486 | _bfd_elf_export_symbol, | |
6487 | &eif); | |
6488 | if (eif.failed) | |
0a1b45a2 | 6489 | return false; |
5a580b3a AM |
6490 | } |
6491 | ||
e6699019 L |
6492 | if (soname != NULL) |
6493 | { | |
6494 | soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
0a1b45a2 | 6495 | soname, true); |
e6699019 L |
6496 | if (soname_indx == (size_t) -1 |
6497 | || !_bfd_elf_add_dynamic_entry (info, DT_SONAME, soname_indx)) | |
0a1b45a2 | 6498 | return false; |
e6699019 L |
6499 | } |
6500 | else | |
6501 | soname_indx = (size_t) -1; | |
6502 | ||
5a580b3a | 6503 | /* Make all global versions with definition. */ |
fd91d419 | 6504 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 6505 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 6506 | if (!d->symver && d->literal) |
5a580b3a AM |
6507 | { |
6508 | const char *verstr, *name; | |
6509 | size_t namelen, verlen, newlen; | |
93252b1c | 6510 | char *newname, *p, leading_char; |
5a580b3a AM |
6511 | struct elf_link_hash_entry *newh; |
6512 | ||
93252b1c | 6513 | leading_char = bfd_get_symbol_leading_char (output_bfd); |
ae5a3597 | 6514 | name = d->pattern; |
93252b1c | 6515 | namelen = strlen (name) + (leading_char != '\0'); |
5a580b3a AM |
6516 | verstr = t->name; |
6517 | verlen = strlen (verstr); | |
6518 | newlen = namelen + verlen + 3; | |
6519 | ||
a50b1753 | 6520 | newname = (char *) bfd_malloc (newlen); |
5a580b3a | 6521 | if (newname == NULL) |
0a1b45a2 | 6522 | return false; |
93252b1c MF |
6523 | newname[0] = leading_char; |
6524 | memcpy (newname + (leading_char != '\0'), name, namelen); | |
5a580b3a AM |
6525 | |
6526 | /* Check the hidden versioned definition. */ | |
6527 | p = newname + namelen; | |
6528 | *p++ = ELF_VER_CHR; | |
6529 | memcpy (p, verstr, verlen + 1); | |
6530 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
0a1b45a2 AM |
6531 | newname, false, false, |
6532 | false); | |
5a580b3a AM |
6533 | if (newh == NULL |
6534 | || (newh->root.type != bfd_link_hash_defined | |
6535 | && newh->root.type != bfd_link_hash_defweak)) | |
6536 | { | |
6537 | /* Check the default versioned definition. */ | |
6538 | *p++ = ELF_VER_CHR; | |
6539 | memcpy (p, verstr, verlen + 1); | |
6540 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
0a1b45a2 AM |
6541 | newname, false, false, |
6542 | false); | |
5a580b3a AM |
6543 | } |
6544 | free (newname); | |
6545 | ||
6546 | /* Mark this version if there is a definition and it is | |
6547 | not defined in a shared object. */ | |
6548 | if (newh != NULL | |
f5385ebf | 6549 | && !newh->def_dynamic |
5a580b3a AM |
6550 | && (newh->root.type == bfd_link_hash_defined |
6551 | || newh->root.type == bfd_link_hash_defweak)) | |
6552 | d->symver = 1; | |
6553 | } | |
6554 | ||
6555 | /* Attach all the symbols to their version information. */ | |
5a580b3a | 6556 | asvinfo.info = info; |
0a1b45a2 | 6557 | asvinfo.failed = false; |
5a580b3a AM |
6558 | |
6559 | elf_link_hash_traverse (elf_hash_table (info), | |
6560 | _bfd_elf_link_assign_sym_version, | |
6561 | &asvinfo); | |
6562 | if (asvinfo.failed) | |
0a1b45a2 | 6563 | return false; |
5a580b3a AM |
6564 | |
6565 | if (!info->allow_undefined_version) | |
6566 | { | |
6567 | /* Check if all global versions have a definition. */ | |
0a1b45a2 | 6568 | bool all_defined = true; |
fd91d419 | 6569 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 6570 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 6571 | if (d->literal && !d->symver && !d->script) |
5a580b3a | 6572 | { |
4eca0228 | 6573 | _bfd_error_handler |
5a580b3a AM |
6574 | (_("%s: undefined version: %s"), |
6575 | d->pattern, t->name); | |
0a1b45a2 | 6576 | all_defined = false; |
5a580b3a AM |
6577 | } |
6578 | ||
6579 | if (!all_defined) | |
6580 | { | |
6581 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 6582 | return false; |
5a580b3a AM |
6583 | } |
6584 | } | |
6585 | ||
902e9fc7 MR |
6586 | /* Set up the version definition section. */ |
6587 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); | |
6588 | BFD_ASSERT (s != NULL); | |
5a580b3a | 6589 | |
902e9fc7 MR |
6590 | /* We may have created additional version definitions if we are |
6591 | just linking a regular application. */ | |
6592 | verdefs = info->version_info; | |
5a580b3a | 6593 | |
902e9fc7 MR |
6594 | /* Skip anonymous version tag. */ |
6595 | if (verdefs != NULL && verdefs->vernum == 0) | |
6596 | verdefs = verdefs->next; | |
5a580b3a | 6597 | |
902e9fc7 MR |
6598 | if (verdefs == NULL && !info->create_default_symver) |
6599 | s->flags |= SEC_EXCLUDE; | |
6600 | else | |
5a580b3a | 6601 | { |
902e9fc7 MR |
6602 | unsigned int cdefs; |
6603 | bfd_size_type size; | |
6604 | bfd_byte *p; | |
6605 | Elf_Internal_Verdef def; | |
6606 | Elf_Internal_Verdaux defaux; | |
6607 | struct bfd_link_hash_entry *bh; | |
6608 | struct elf_link_hash_entry *h; | |
6609 | const char *name; | |
5a580b3a | 6610 | |
902e9fc7 MR |
6611 | cdefs = 0; |
6612 | size = 0; | |
5a580b3a | 6613 | |
902e9fc7 MR |
6614 | /* Make space for the base version. */ |
6615 | size += sizeof (Elf_External_Verdef); | |
6616 | size += sizeof (Elf_External_Verdaux); | |
6617 | ++cdefs; | |
6618 | ||
6619 | /* Make space for the default version. */ | |
6620 | if (info->create_default_symver) | |
6621 | { | |
6622 | size += sizeof (Elf_External_Verdef); | |
6623 | ++cdefs; | |
3e3b46e5 PB |
6624 | } |
6625 | ||
5a580b3a AM |
6626 | for (t = verdefs; t != NULL; t = t->next) |
6627 | { | |
6628 | struct bfd_elf_version_deps *n; | |
6629 | ||
a6cc6b3b RO |
6630 | /* Don't emit base version twice. */ |
6631 | if (t->vernum == 0) | |
6632 | continue; | |
6633 | ||
5a580b3a AM |
6634 | size += sizeof (Elf_External_Verdef); |
6635 | size += sizeof (Elf_External_Verdaux); | |
6636 | ++cdefs; | |
6637 | ||
6638 | for (n = t->deps; n != NULL; n = n->next) | |
6639 | size += sizeof (Elf_External_Verdaux); | |
6640 | } | |
6641 | ||
eea6121a | 6642 | s->size = size; |
a50b1753 | 6643 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
eea6121a | 6644 | if (s->contents == NULL && s->size != 0) |
0a1b45a2 | 6645 | return false; |
5a580b3a AM |
6646 | |
6647 | /* Fill in the version definition section. */ | |
6648 | ||
6649 | p = s->contents; | |
6650 | ||
6651 | def.vd_version = VER_DEF_CURRENT; | |
6652 | def.vd_flags = VER_FLG_BASE; | |
6653 | def.vd_ndx = 1; | |
6654 | def.vd_cnt = 1; | |
3e3b46e5 PB |
6655 | if (info->create_default_symver) |
6656 | { | |
6657 | def.vd_aux = 2 * sizeof (Elf_External_Verdef); | |
6658 | def.vd_next = sizeof (Elf_External_Verdef); | |
6659 | } | |
6660 | else | |
6661 | { | |
6662 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6663 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6664 | + sizeof (Elf_External_Verdaux)); | |
6665 | } | |
5a580b3a | 6666 | |
ef53be89 | 6667 | if (soname_indx != (size_t) -1) |
5a580b3a AM |
6668 | { |
6669 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6670 | soname_indx); | |
6671 | def.vd_hash = bfd_elf_hash (soname); | |
6672 | defaux.vda_name = soname_indx; | |
3e3b46e5 | 6673 | name = soname; |
5a580b3a AM |
6674 | } |
6675 | else | |
6676 | { | |
ef53be89 | 6677 | size_t indx; |
5a580b3a | 6678 | |
765cf5f6 | 6679 | name = lbasename (bfd_get_filename (output_bfd)); |
5a580b3a AM |
6680 | def.vd_hash = bfd_elf_hash (name); |
6681 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
0a1b45a2 | 6682 | name, false); |
ef53be89 | 6683 | if (indx == (size_t) -1) |
0a1b45a2 | 6684 | return false; |
5a580b3a AM |
6685 | defaux.vda_name = indx; |
6686 | } | |
6687 | defaux.vda_next = 0; | |
6688 | ||
6689 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6690 | (Elf_External_Verdef *) p); | |
6691 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
6692 | if (info->create_default_symver) |
6693 | { | |
6694 | /* Add a symbol representing this version. */ | |
6695 | bh = NULL; | |
6696 | if (! (_bfd_generic_link_add_one_symbol | |
6697 | (info, dynobj, name, BSF_GLOBAL, bfd_abs_section_ptr, | |
0a1b45a2 | 6698 | 0, NULL, false, |
3e3b46e5 | 6699 | get_elf_backend_data (dynobj)->collect, &bh))) |
0a1b45a2 | 6700 | return false; |
3e3b46e5 PB |
6701 | h = (struct elf_link_hash_entry *) bh; |
6702 | h->non_elf = 0; | |
6703 | h->def_regular = 1; | |
6704 | h->type = STT_OBJECT; | |
6705 | h->verinfo.vertree = NULL; | |
6706 | ||
6707 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
0a1b45a2 | 6708 | return false; |
3e3b46e5 PB |
6709 | |
6710 | /* Create a duplicate of the base version with the same | |
6711 | aux block, but different flags. */ | |
6712 | def.vd_flags = 0; | |
6713 | def.vd_ndx = 2; | |
6714 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6715 | if (verdefs) | |
6716 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6717 | + sizeof (Elf_External_Verdaux)); | |
6718 | else | |
6719 | def.vd_next = 0; | |
6720 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6721 | (Elf_External_Verdef *) p); | |
6722 | p += sizeof (Elf_External_Verdef); | |
6723 | } | |
5a580b3a AM |
6724 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, |
6725 | (Elf_External_Verdaux *) p); | |
6726 | p += sizeof (Elf_External_Verdaux); | |
6727 | ||
6728 | for (t = verdefs; t != NULL; t = t->next) | |
6729 | { | |
6730 | unsigned int cdeps; | |
6731 | struct bfd_elf_version_deps *n; | |
5a580b3a | 6732 | |
a6cc6b3b RO |
6733 | /* Don't emit the base version twice. */ |
6734 | if (t->vernum == 0) | |
6735 | continue; | |
6736 | ||
5a580b3a AM |
6737 | cdeps = 0; |
6738 | for (n = t->deps; n != NULL; n = n->next) | |
6739 | ++cdeps; | |
6740 | ||
6741 | /* Add a symbol representing this version. */ | |
6742 | bh = NULL; | |
6743 | if (! (_bfd_generic_link_add_one_symbol | |
6744 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
0a1b45a2 | 6745 | 0, NULL, false, |
5a580b3a | 6746 | get_elf_backend_data (dynobj)->collect, &bh))) |
0a1b45a2 | 6747 | return false; |
5a580b3a | 6748 | h = (struct elf_link_hash_entry *) bh; |
f5385ebf AM |
6749 | h->non_elf = 0; |
6750 | h->def_regular = 1; | |
5a580b3a AM |
6751 | h->type = STT_OBJECT; |
6752 | h->verinfo.vertree = t; | |
6753 | ||
c152c796 | 6754 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
0a1b45a2 | 6755 | return false; |
5a580b3a AM |
6756 | |
6757 | def.vd_version = VER_DEF_CURRENT; | |
6758 | def.vd_flags = 0; | |
6759 | if (t->globals.list == NULL | |
6760 | && t->locals.list == NULL | |
6761 | && ! t->used) | |
6762 | def.vd_flags |= VER_FLG_WEAK; | |
3e3b46e5 | 6763 | def.vd_ndx = t->vernum + (info->create_default_symver ? 2 : 1); |
5a580b3a AM |
6764 | def.vd_cnt = cdeps + 1; |
6765 | def.vd_hash = bfd_elf_hash (t->name); | |
6766 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6767 | def.vd_next = 0; | |
a6cc6b3b RO |
6768 | |
6769 | /* If a basever node is next, it *must* be the last node in | |
6770 | the chain, otherwise Verdef construction breaks. */ | |
6771 | if (t->next != NULL && t->next->vernum == 0) | |
6772 | BFD_ASSERT (t->next->next == NULL); | |
6773 | ||
6774 | if (t->next != NULL && t->next->vernum != 0) | |
5a580b3a AM |
6775 | def.vd_next = (sizeof (Elf_External_Verdef) |
6776 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
6777 | ||
6778 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6779 | (Elf_External_Verdef *) p); | |
6780 | p += sizeof (Elf_External_Verdef); | |
6781 | ||
6782 | defaux.vda_name = h->dynstr_index; | |
6783 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6784 | h->dynstr_index); | |
6785 | defaux.vda_next = 0; | |
6786 | if (t->deps != NULL) | |
6787 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6788 | t->name_indx = defaux.vda_name; | |
6789 | ||
6790 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6791 | (Elf_External_Verdaux *) p); | |
6792 | p += sizeof (Elf_External_Verdaux); | |
6793 | ||
6794 | for (n = t->deps; n != NULL; n = n->next) | |
6795 | { | |
6796 | if (n->version_needed == NULL) | |
6797 | { | |
6798 | /* This can happen if there was an error in the | |
6799 | version script. */ | |
6800 | defaux.vda_name = 0; | |
6801 | } | |
6802 | else | |
6803 | { | |
6804 | defaux.vda_name = n->version_needed->name_indx; | |
6805 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6806 | defaux.vda_name); | |
6807 | } | |
6808 | if (n->next == NULL) | |
6809 | defaux.vda_next = 0; | |
6810 | else | |
6811 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6812 | ||
6813 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6814 | (Elf_External_Verdaux *) p); | |
6815 | p += sizeof (Elf_External_Verdaux); | |
6816 | } | |
6817 | } | |
6818 | ||
5a580b3a AM |
6819 | elf_tdata (output_bfd)->cverdefs = cdefs; |
6820 | } | |
902e9fc7 MR |
6821 | } |
6822 | ||
6823 | bed = get_elf_backend_data (output_bfd); | |
6824 | ||
6825 | if (info->gc_sections && bed->can_gc_sections) | |
6826 | { | |
6827 | struct elf_gc_sweep_symbol_info sweep_info; | |
902e9fc7 MR |
6828 | |
6829 | /* Remove the symbols that were in the swept sections from the | |
3d13f3e9 | 6830 | dynamic symbol table. */ |
902e9fc7 MR |
6831 | sweep_info.info = info; |
6832 | sweep_info.hide_symbol = bed->elf_backend_hide_symbol; | |
6833 | elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol, | |
6834 | &sweep_info); | |
3d13f3e9 AM |
6835 | } |
6836 | ||
6837 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) | |
6838 | { | |
6839 | asection *s; | |
6840 | struct elf_find_verdep_info sinfo; | |
6841 | ||
6842 | /* Work out the size of the version reference section. */ | |
6843 | ||
6844 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); | |
6845 | BFD_ASSERT (s != NULL); | |
902e9fc7 | 6846 | |
3d13f3e9 AM |
6847 | sinfo.info = info; |
6848 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
6849 | if (sinfo.vers == 0) | |
6850 | sinfo.vers = 1; | |
0a1b45a2 | 6851 | sinfo.failed = false; |
3d13f3e9 AM |
6852 | |
6853 | elf_link_hash_traverse (elf_hash_table (info), | |
6854 | _bfd_elf_link_find_version_dependencies, | |
6855 | &sinfo); | |
6856 | if (sinfo.failed) | |
0a1b45a2 | 6857 | return false; |
3d13f3e9 AM |
6858 | |
6859 | if (elf_tdata (output_bfd)->verref == NULL) | |
6860 | s->flags |= SEC_EXCLUDE; | |
6861 | else | |
6862 | { | |
6863 | Elf_Internal_Verneed *vn; | |
6864 | unsigned int size; | |
6865 | unsigned int crefs; | |
6866 | bfd_byte *p; | |
6867 | ||
6868 | /* Build the version dependency section. */ | |
6869 | size = 0; | |
6870 | crefs = 0; | |
6871 | for (vn = elf_tdata (output_bfd)->verref; | |
6872 | vn != NULL; | |
6873 | vn = vn->vn_nextref) | |
6874 | { | |
6875 | Elf_Internal_Vernaux *a; | |
6876 | ||
6877 | size += sizeof (Elf_External_Verneed); | |
6878 | ++crefs; | |
6879 | for (a = vn->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6880 | size += sizeof (Elf_External_Vernaux); | |
6881 | } | |
6882 | ||
6883 | s->size = size; | |
6884 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); | |
6885 | if (s->contents == NULL) | |
0a1b45a2 | 6886 | return false; |
3d13f3e9 AM |
6887 | |
6888 | p = s->contents; | |
6889 | for (vn = elf_tdata (output_bfd)->verref; | |
6890 | vn != NULL; | |
6891 | vn = vn->vn_nextref) | |
6892 | { | |
6893 | unsigned int caux; | |
6894 | Elf_Internal_Vernaux *a; | |
6895 | size_t indx; | |
6896 | ||
6897 | caux = 0; | |
6898 | for (a = vn->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6899 | ++caux; | |
6900 | ||
6901 | vn->vn_version = VER_NEED_CURRENT; | |
6902 | vn->vn_cnt = caux; | |
6903 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6904 | elf_dt_name (vn->vn_bfd) != NULL | |
6905 | ? elf_dt_name (vn->vn_bfd) | |
765cf5f6 AM |
6906 | : lbasename (bfd_get_filename |
6907 | (vn->vn_bfd)), | |
0a1b45a2 | 6908 | false); |
3d13f3e9 | 6909 | if (indx == (size_t) -1) |
0a1b45a2 | 6910 | return false; |
3d13f3e9 AM |
6911 | vn->vn_file = indx; |
6912 | vn->vn_aux = sizeof (Elf_External_Verneed); | |
6913 | if (vn->vn_nextref == NULL) | |
6914 | vn->vn_next = 0; | |
6915 | else | |
6916 | vn->vn_next = (sizeof (Elf_External_Verneed) | |
6917 | + caux * sizeof (Elf_External_Vernaux)); | |
6918 | ||
6919 | _bfd_elf_swap_verneed_out (output_bfd, vn, | |
6920 | (Elf_External_Verneed *) p); | |
6921 | p += sizeof (Elf_External_Verneed); | |
6922 | ||
6923 | for (a = vn->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6924 | { | |
6925 | a->vna_hash = bfd_elf_hash (a->vna_nodename); | |
6926 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
0a1b45a2 | 6927 | a->vna_nodename, false); |
3d13f3e9 | 6928 | if (indx == (size_t) -1) |
0a1b45a2 | 6929 | return false; |
3d13f3e9 AM |
6930 | a->vna_name = indx; |
6931 | if (a->vna_nextptr == NULL) | |
6932 | a->vna_next = 0; | |
6933 | else | |
6934 | a->vna_next = sizeof (Elf_External_Vernaux); | |
6935 | ||
6936 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
6937 | (Elf_External_Vernaux *) p); | |
6938 | p += sizeof (Elf_External_Vernaux); | |
6939 | } | |
6940 | } | |
6941 | ||
6942 | elf_tdata (output_bfd)->cverrefs = crefs; | |
6943 | } | |
902e9fc7 MR |
6944 | } |
6945 | ||
6946 | /* Any syms created from now on start with -1 in | |
6947 | got.refcount/offset and plt.refcount/offset. */ | |
6948 | elf_hash_table (info)->init_got_refcount | |
6949 | = elf_hash_table (info)->init_got_offset; | |
6950 | elf_hash_table (info)->init_plt_refcount | |
6951 | = elf_hash_table (info)->init_plt_offset; | |
6952 | ||
6953 | if (bfd_link_relocatable (info) | |
6954 | && !_bfd_elf_size_group_sections (info)) | |
0a1b45a2 | 6955 | return false; |
902e9fc7 MR |
6956 | |
6957 | /* The backend may have to create some sections regardless of whether | |
6958 | we're dynamic or not. */ | |
6959 | if (bed->elf_backend_always_size_sections | |
6960 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
0a1b45a2 | 6961 | return false; |
902e9fc7 MR |
6962 | |
6963 | /* Determine any GNU_STACK segment requirements, after the backend | |
6964 | has had a chance to set a default segment size. */ | |
6965 | if (info->execstack) | |
6966 | elf_stack_flags (output_bfd) = PF_R | PF_W | PF_X; | |
6967 | else if (info->noexecstack) | |
6968 | elf_stack_flags (output_bfd) = PF_R | PF_W; | |
6969 | else | |
6970 | { | |
6971 | bfd *inputobj; | |
6972 | asection *notesec = NULL; | |
6973 | int exec = 0; | |
6974 | ||
6975 | for (inputobj = info->input_bfds; | |
6976 | inputobj; | |
6977 | inputobj = inputobj->link.next) | |
6978 | { | |
6979 | asection *s; | |
6980 | ||
6981 | if (inputobj->flags | |
6982 | & (DYNAMIC | EXEC_P | BFD_PLUGIN | BFD_LINKER_CREATED)) | |
6983 | continue; | |
57963c05 AM |
6984 | s = inputobj->sections; |
6985 | if (s == NULL || s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
6986 | continue; | |
6987 | ||
902e9fc7 MR |
6988 | s = bfd_get_section_by_name (inputobj, ".note.GNU-stack"); |
6989 | if (s) | |
6990 | { | |
6991 | if (s->flags & SEC_CODE) | |
6992 | exec = PF_X; | |
6993 | notesec = s; | |
6994 | } | |
6995 | else if (bed->default_execstack) | |
6996 | exec = PF_X; | |
6997 | } | |
6998 | if (notesec || info->stacksize > 0) | |
6999 | elf_stack_flags (output_bfd) = PF_R | PF_W | exec; | |
7000 | if (notesec && exec && bfd_link_relocatable (info) | |
7001 | && notesec->output_section != bfd_abs_section_ptr) | |
7002 | notesec->output_section->flags |= SEC_CODE; | |
7003 | } | |
7004 | ||
7005 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) | |
7006 | { | |
7007 | struct elf_info_failed eif; | |
7008 | struct elf_link_hash_entry *h; | |
7009 | asection *dynstr; | |
7010 | asection *s; | |
7011 | ||
7012 | *sinterpptr = bfd_get_linker_section (dynobj, ".interp"); | |
7013 | BFD_ASSERT (*sinterpptr != NULL || !bfd_link_executable (info) || info->nointerp); | |
7014 | ||
902e9fc7 MR |
7015 | if (info->symbolic) |
7016 | { | |
7017 | if (!_bfd_elf_add_dynamic_entry (info, DT_SYMBOLIC, 0)) | |
0a1b45a2 | 7018 | return false; |
902e9fc7 MR |
7019 | info->flags |= DF_SYMBOLIC; |
7020 | } | |
7021 | ||
7022 | if (rpath != NULL) | |
7023 | { | |
7024 | size_t indx; | |
7025 | bfd_vma tag; | |
7026 | ||
7027 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath, | |
0a1b45a2 | 7028 | true); |
902e9fc7 | 7029 | if (indx == (size_t) -1) |
0a1b45a2 | 7030 | return false; |
902e9fc7 MR |
7031 | |
7032 | tag = info->new_dtags ? DT_RUNPATH : DT_RPATH; | |
7033 | if (!_bfd_elf_add_dynamic_entry (info, tag, indx)) | |
0a1b45a2 | 7034 | return false; |
902e9fc7 MR |
7035 | } |
7036 | ||
7037 | if (filter_shlib != NULL) | |
7038 | { | |
7039 | size_t indx; | |
7040 | ||
7041 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
0a1b45a2 | 7042 | filter_shlib, true); |
902e9fc7 MR |
7043 | if (indx == (size_t) -1 |
7044 | || !_bfd_elf_add_dynamic_entry (info, DT_FILTER, indx)) | |
0a1b45a2 | 7045 | return false; |
902e9fc7 MR |
7046 | } |
7047 | ||
7048 | if (auxiliary_filters != NULL) | |
7049 | { | |
7050 | const char * const *p; | |
7051 | ||
7052 | for (p = auxiliary_filters; *p != NULL; p++) | |
7053 | { | |
7054 | size_t indx; | |
7055 | ||
7056 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
0a1b45a2 | 7057 | *p, true); |
902e9fc7 MR |
7058 | if (indx == (size_t) -1 |
7059 | || !_bfd_elf_add_dynamic_entry (info, DT_AUXILIARY, indx)) | |
0a1b45a2 | 7060 | return false; |
902e9fc7 MR |
7061 | } |
7062 | } | |
7063 | ||
7064 | if (audit != NULL) | |
7065 | { | |
7066 | size_t indx; | |
7067 | ||
7068 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, audit, | |
0a1b45a2 | 7069 | true); |
902e9fc7 MR |
7070 | if (indx == (size_t) -1 |
7071 | || !_bfd_elf_add_dynamic_entry (info, DT_AUDIT, indx)) | |
0a1b45a2 | 7072 | return false; |
902e9fc7 MR |
7073 | } |
7074 | ||
7075 | if (depaudit != NULL) | |
7076 | { | |
7077 | size_t indx; | |
7078 | ||
7079 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, depaudit, | |
0a1b45a2 | 7080 | true); |
902e9fc7 MR |
7081 | if (indx == (size_t) -1 |
7082 | || !_bfd_elf_add_dynamic_entry (info, DT_DEPAUDIT, indx)) | |
0a1b45a2 | 7083 | return false; |
902e9fc7 MR |
7084 | } |
7085 | ||
7086 | eif.info = info; | |
0a1b45a2 | 7087 | eif.failed = false; |
902e9fc7 MR |
7088 | |
7089 | /* Find all symbols which were defined in a dynamic object and make | |
7090 | the backend pick a reasonable value for them. */ | |
7091 | elf_link_hash_traverse (elf_hash_table (info), | |
7092 | _bfd_elf_adjust_dynamic_symbol, | |
7093 | &eif); | |
7094 | if (eif.failed) | |
0a1b45a2 | 7095 | return false; |
902e9fc7 MR |
7096 | |
7097 | /* Add some entries to the .dynamic section. We fill in some of the | |
7098 | values later, in bfd_elf_final_link, but we must add the entries | |
7099 | now so that we know the final size of the .dynamic section. */ | |
7100 | ||
7101 | /* If there are initialization and/or finalization functions to | |
7102 | call then add the corresponding DT_INIT/DT_FINI entries. */ | |
7103 | h = (info->init_function | |
7104 | ? elf_link_hash_lookup (elf_hash_table (info), | |
0a1b45a2 AM |
7105 | info->init_function, false, |
7106 | false, false) | |
902e9fc7 MR |
7107 | : NULL); |
7108 | if (h != NULL | |
7109 | && (h->ref_regular | |
7110 | || h->def_regular)) | |
7111 | { | |
7112 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT, 0)) | |
0a1b45a2 | 7113 | return false; |
902e9fc7 MR |
7114 | } |
7115 | h = (info->fini_function | |
7116 | ? elf_link_hash_lookup (elf_hash_table (info), | |
0a1b45a2 AM |
7117 | info->fini_function, false, |
7118 | false, false) | |
902e9fc7 MR |
7119 | : NULL); |
7120 | if (h != NULL | |
7121 | && (h->ref_regular | |
7122 | || h->def_regular)) | |
7123 | { | |
7124 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI, 0)) | |
0a1b45a2 | 7125 | return false; |
902e9fc7 MR |
7126 | } |
7127 | ||
7128 | s = bfd_get_section_by_name (output_bfd, ".preinit_array"); | |
7129 | if (s != NULL && s->linker_has_input) | |
7130 | { | |
7131 | /* DT_PREINIT_ARRAY is not allowed in shared library. */ | |
7132 | if (! bfd_link_executable (info)) | |
7133 | { | |
7134 | bfd *sub; | |
7135 | asection *o; | |
7136 | ||
57963c05 AM |
7137 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
7138 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour | |
7139 | && (o = sub->sections) != NULL | |
7140 | && o->sec_info_type != SEC_INFO_TYPE_JUST_SYMS) | |
902e9fc7 MR |
7141 | for (o = sub->sections; o != NULL; o = o->next) |
7142 | if (elf_section_data (o)->this_hdr.sh_type | |
7143 | == SHT_PREINIT_ARRAY) | |
7144 | { | |
7145 | _bfd_error_handler | |
871b3ab2 | 7146 | (_("%pB: .preinit_array section is not allowed in DSO"), |
902e9fc7 MR |
7147 | sub); |
7148 | break; | |
7149 | } | |
7150 | ||
7151 | bfd_set_error (bfd_error_nonrepresentable_section); | |
0a1b45a2 | 7152 | return false; |
902e9fc7 MR |
7153 | } |
7154 | ||
7155 | if (!_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAY, 0) | |
7156 | || !_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAYSZ, 0)) | |
0a1b45a2 | 7157 | return false; |
902e9fc7 MR |
7158 | } |
7159 | s = bfd_get_section_by_name (output_bfd, ".init_array"); | |
7160 | if (s != NULL && s->linker_has_input) | |
7161 | { | |
7162 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAY, 0) | |
7163 | || !_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAYSZ, 0)) | |
0a1b45a2 | 7164 | return false; |
902e9fc7 MR |
7165 | } |
7166 | s = bfd_get_section_by_name (output_bfd, ".fini_array"); | |
7167 | if (s != NULL && s->linker_has_input) | |
7168 | { | |
7169 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAY, 0) | |
7170 | || !_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAYSZ, 0)) | |
0a1b45a2 | 7171 | return false; |
902e9fc7 MR |
7172 | } |
7173 | ||
7174 | dynstr = bfd_get_linker_section (dynobj, ".dynstr"); | |
7175 | /* If .dynstr is excluded from the link, we don't want any of | |
7176 | these tags. Strictly, we should be checking each section | |
7177 | individually; This quick check covers for the case where | |
7178 | someone does a /DISCARD/ : { *(*) }. */ | |
7179 | if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr) | |
7180 | { | |
7181 | bfd_size_type strsize; | |
7182 | ||
7183 | strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); | |
7184 | if ((info->emit_hash | |
7185 | && !_bfd_elf_add_dynamic_entry (info, DT_HASH, 0)) | |
7186 | || (info->emit_gnu_hash | |
f16a9783 MS |
7187 | && (bed->record_xhash_symbol == NULL |
7188 | && !_bfd_elf_add_dynamic_entry (info, DT_GNU_HASH, 0))) | |
902e9fc7 MR |
7189 | || !_bfd_elf_add_dynamic_entry (info, DT_STRTAB, 0) |
7190 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
7191 | || !_bfd_elf_add_dynamic_entry (info, DT_STRSZ, strsize) | |
7192 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMENT, | |
6a0a0dd0 VDM |
7193 | bed->s->sizeof_sym) |
7194 | || (info->gnu_flags_1 | |
7195 | && !_bfd_elf_add_dynamic_entry (info, DT_GNU_FLAGS_1, | |
7196 | info->gnu_flags_1))) | |
0a1b45a2 | 7197 | return false; |
902e9fc7 MR |
7198 | } |
7199 | } | |
7200 | ||
7201 | if (! _bfd_elf_maybe_strip_eh_frame_hdr (info)) | |
0a1b45a2 | 7202 | return false; |
902e9fc7 MR |
7203 | |
7204 | /* The backend must work out the sizes of all the other dynamic | |
7205 | sections. */ | |
7206 | if (dynobj != NULL | |
7207 | && bed->elf_backend_size_dynamic_sections != NULL | |
7208 | && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) | |
0a1b45a2 | 7209 | return false; |
902e9fc7 MR |
7210 | |
7211 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) | |
7212 | { | |
902e9fc7 MR |
7213 | if (elf_tdata (output_bfd)->cverdefs) |
7214 | { | |
7215 | unsigned int crefs = elf_tdata (output_bfd)->cverdefs; | |
7216 | ||
7217 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERDEF, 0) | |
7218 | || !_bfd_elf_add_dynamic_entry (info, DT_VERDEFNUM, crefs)) | |
0a1b45a2 | 7219 | return false; |
902e9fc7 MR |
7220 | } |
7221 | ||
7222 | if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS)) | |
7223 | { | |
7224 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS, info->flags)) | |
0a1b45a2 | 7225 | return false; |
902e9fc7 MR |
7226 | } |
7227 | else if (info->flags & DF_BIND_NOW) | |
7228 | { | |
7229 | if (!_bfd_elf_add_dynamic_entry (info, DT_BIND_NOW, 0)) | |
0a1b45a2 | 7230 | return false; |
902e9fc7 MR |
7231 | } |
7232 | ||
7233 | if (info->flags_1) | |
7234 | { | |
7235 | if (bfd_link_executable (info)) | |
7236 | info->flags_1 &= ~ (DF_1_INITFIRST | |
7237 | | DF_1_NODELETE | |
7238 | | DF_1_NOOPEN); | |
7239 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS_1, info->flags_1)) | |
0a1b45a2 | 7240 | return false; |
902e9fc7 MR |
7241 | } |
7242 | ||
7243 | if (elf_tdata (output_bfd)->cverrefs) | |
7244 | { | |
7245 | unsigned int crefs = elf_tdata (output_bfd)->cverrefs; | |
7246 | ||
7247 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERNEED, 0) | |
7248 | || !_bfd_elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs)) | |
0a1b45a2 | 7249 | return false; |
902e9fc7 | 7250 | } |
5a580b3a | 7251 | |
8423293d AM |
7252 | if ((elf_tdata (output_bfd)->cverrefs == 0 |
7253 | && elf_tdata (output_bfd)->cverdefs == 0) | |
63f452a8 | 7254 | || _bfd_elf_link_renumber_dynsyms (output_bfd, info, NULL) <= 1) |
8423293d | 7255 | { |
902e9fc7 MR |
7256 | asection *s; |
7257 | ||
3d4d4302 | 7258 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
8423293d AM |
7259 | s->flags |= SEC_EXCLUDE; |
7260 | } | |
7261 | } | |
0a1b45a2 | 7262 | return true; |
8423293d AM |
7263 | } |
7264 | ||
74541ad4 AM |
7265 | /* Find the first non-excluded output section. We'll use its |
7266 | section symbol for some emitted relocs. */ | |
7267 | void | |
7268 | _bfd_elf_init_1_index_section (bfd *output_bfd, struct bfd_link_info *info) | |
7269 | { | |
7270 | asection *s; | |
f26a3287 | 7271 | asection *found = NULL; |
74541ad4 AM |
7272 | |
7273 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
7274 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC | |
d00dd7dc | 7275 | && !_bfd_elf_omit_section_dynsym_default (output_bfd, info, s)) |
74541ad4 | 7276 | { |
f26a3287 AM |
7277 | found = s; |
7278 | if ((s->flags & SEC_THREAD_LOCAL) == 0) | |
7279 | break; | |
74541ad4 | 7280 | } |
f26a3287 | 7281 | elf_hash_table (info)->text_index_section = found; |
74541ad4 AM |
7282 | } |
7283 | ||
7284 | /* Find two non-excluded output sections, one for code, one for data. | |
7285 | We'll use their section symbols for some emitted relocs. */ | |
7286 | void | |
7287 | _bfd_elf_init_2_index_sections (bfd *output_bfd, struct bfd_link_info *info) | |
7288 | { | |
7289 | asection *s; | |
f26a3287 | 7290 | asection *found = NULL; |
74541ad4 | 7291 | |
266b05cf | 7292 | /* Data first, since setting text_index_section changes |
7f923b7f | 7293 | _bfd_elf_omit_section_dynsym_default. */ |
74541ad4 | 7294 | for (s = output_bfd->sections; s != NULL; s = s->next) |
f26a3287 AM |
7295 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC |
7296 | && !(s->flags & SEC_READONLY) | |
d00dd7dc | 7297 | && !_bfd_elf_omit_section_dynsym_default (output_bfd, info, s)) |
74541ad4 | 7298 | { |
f26a3287 AM |
7299 | found = s; |
7300 | if ((s->flags & SEC_THREAD_LOCAL) == 0) | |
7301 | break; | |
74541ad4 | 7302 | } |
f26a3287 | 7303 | elf_hash_table (info)->data_index_section = found; |
74541ad4 AM |
7304 | |
7305 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
f26a3287 AM |
7306 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC |
7307 | && (s->flags & SEC_READONLY) | |
d00dd7dc | 7308 | && !_bfd_elf_omit_section_dynsym_default (output_bfd, info, s)) |
74541ad4 | 7309 | { |
f26a3287 | 7310 | found = s; |
74541ad4 AM |
7311 | break; |
7312 | } | |
f26a3287 | 7313 | elf_hash_table (info)->text_index_section = found; |
74541ad4 AM |
7314 | } |
7315 | ||
f16a9783 MS |
7316 | #define GNU_HASH_SECTION_NAME(bed) \ |
7317 | (bed)->record_xhash_symbol != NULL ? ".MIPS.xhash" : ".gnu.hash" | |
7318 | ||
0a1b45a2 | 7319 | bool |
8423293d AM |
7320 | bfd_elf_size_dynsym_hash_dynstr (bfd *output_bfd, struct bfd_link_info *info) |
7321 | { | |
74541ad4 | 7322 | const struct elf_backend_data *bed; |
23ec1e32 | 7323 | unsigned long section_sym_count; |
96d01d93 | 7324 | bfd_size_type dynsymcount = 0; |
74541ad4 | 7325 | |
8423293d | 7326 | if (!is_elf_hash_table (info->hash)) |
0a1b45a2 | 7327 | return true; |
8423293d | 7328 | |
74541ad4 AM |
7329 | bed = get_elf_backend_data (output_bfd); |
7330 | (*bed->elf_backend_init_index_section) (output_bfd, info); | |
7331 | ||
23ec1e32 MR |
7332 | /* Assign dynsym indices. In a shared library we generate a section |
7333 | symbol for each output section, which come first. Next come all | |
7334 | of the back-end allocated local dynamic syms, followed by the rest | |
7335 | of the global symbols. | |
7336 | ||
7337 | This is usually not needed for static binaries, however backends | |
7338 | can request to always do it, e.g. the MIPS backend uses dynamic | |
7339 | symbol counts to lay out GOT, which will be produced in the | |
7340 | presence of GOT relocations even in static binaries (holding fixed | |
7341 | data in that case, to satisfy those relocations). */ | |
7342 | ||
7343 | if (elf_hash_table (info)->dynamic_sections_created | |
7344 | || bed->always_renumber_dynsyms) | |
7345 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info, | |
7346 | §ion_sym_count); | |
7347 | ||
8423293d AM |
7348 | if (elf_hash_table (info)->dynamic_sections_created) |
7349 | { | |
7350 | bfd *dynobj; | |
8423293d | 7351 | asection *s; |
8423293d AM |
7352 | unsigned int dtagcount; |
7353 | ||
7354 | dynobj = elf_hash_table (info)->dynobj; | |
7355 | ||
5a580b3a | 7356 | /* Work out the size of the symbol version section. */ |
3d4d4302 | 7357 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
5a580b3a | 7358 | BFD_ASSERT (s != NULL); |
d5486c43 | 7359 | if ((s->flags & SEC_EXCLUDE) == 0) |
5a580b3a | 7360 | { |
eea6121a | 7361 | s->size = dynsymcount * sizeof (Elf_External_Versym); |
a50b1753 | 7362 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
5a580b3a | 7363 | if (s->contents == NULL) |
0a1b45a2 | 7364 | return false; |
5a580b3a AM |
7365 | |
7366 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERSYM, 0)) | |
0a1b45a2 | 7367 | return false; |
5a580b3a AM |
7368 | } |
7369 | ||
7370 | /* Set the size of the .dynsym and .hash sections. We counted | |
7371 | the number of dynamic symbols in elf_link_add_object_symbols. | |
7372 | We will build the contents of .dynsym and .hash when we build | |
7373 | the final symbol table, because until then we do not know the | |
7374 | correct value to give the symbols. We built the .dynstr | |
7375 | section as we went along in elf_link_add_object_symbols. */ | |
cae1fbbb | 7376 | s = elf_hash_table (info)->dynsym; |
5a580b3a | 7377 | BFD_ASSERT (s != NULL); |
eea6121a | 7378 | s->size = dynsymcount * bed->s->sizeof_sym; |
5a580b3a | 7379 | |
d5486c43 L |
7380 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
7381 | if (s->contents == NULL) | |
0a1b45a2 | 7382 | return false; |
5a580b3a | 7383 | |
d5486c43 L |
7384 | /* The first entry in .dynsym is a dummy symbol. Clear all the |
7385 | section syms, in case we don't output them all. */ | |
7386 | ++section_sym_count; | |
7387 | memset (s->contents, 0, section_sym_count * bed->s->sizeof_sym); | |
5a580b3a | 7388 | |
fdc90cb4 JJ |
7389 | elf_hash_table (info)->bucketcount = 0; |
7390 | ||
5a580b3a AM |
7391 | /* Compute the size of the hashing table. As a side effect this |
7392 | computes the hash values for all the names we export. */ | |
fdc90cb4 JJ |
7393 | if (info->emit_hash) |
7394 | { | |
7395 | unsigned long int *hashcodes; | |
14b1c01e | 7396 | struct hash_codes_info hashinf; |
fdc90cb4 JJ |
7397 | bfd_size_type amt; |
7398 | unsigned long int nsyms; | |
7399 | size_t bucketcount; | |
7400 | size_t hash_entry_size; | |
7401 | ||
7402 | /* Compute the hash values for all exported symbols. At the same | |
7403 | time store the values in an array so that we could use them for | |
7404 | optimizations. */ | |
7405 | amt = dynsymcount * sizeof (unsigned long int); | |
a50b1753 | 7406 | hashcodes = (unsigned long int *) bfd_malloc (amt); |
fdc90cb4 | 7407 | if (hashcodes == NULL) |
0a1b45a2 | 7408 | return false; |
14b1c01e | 7409 | hashinf.hashcodes = hashcodes; |
0a1b45a2 | 7410 | hashinf.error = false; |
5a580b3a | 7411 | |
fdc90cb4 JJ |
7412 | /* Put all hash values in HASHCODES. */ |
7413 | elf_link_hash_traverse (elf_hash_table (info), | |
14b1c01e AM |
7414 | elf_collect_hash_codes, &hashinf); |
7415 | if (hashinf.error) | |
4dd07732 AM |
7416 | { |
7417 | free (hashcodes); | |
0a1b45a2 | 7418 | return false; |
4dd07732 | 7419 | } |
5a580b3a | 7420 | |
14b1c01e | 7421 | nsyms = hashinf.hashcodes - hashcodes; |
fdc90cb4 JJ |
7422 | bucketcount |
7423 | = compute_bucket_count (info, hashcodes, nsyms, 0); | |
7424 | free (hashcodes); | |
7425 | ||
4b48e2f6 | 7426 | if (bucketcount == 0 && nsyms > 0) |
0a1b45a2 | 7427 | return false; |
5a580b3a | 7428 | |
fdc90cb4 JJ |
7429 | elf_hash_table (info)->bucketcount = bucketcount; |
7430 | ||
3d4d4302 | 7431 | s = bfd_get_linker_section (dynobj, ".hash"); |
fdc90cb4 JJ |
7432 | BFD_ASSERT (s != NULL); |
7433 | hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize; | |
7434 | s->size = ((2 + bucketcount + dynsymcount) * hash_entry_size); | |
a50b1753 | 7435 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 | 7436 | if (s->contents == NULL) |
0a1b45a2 | 7437 | return false; |
fdc90cb4 JJ |
7438 | |
7439 | bfd_put (8 * hash_entry_size, output_bfd, bucketcount, s->contents); | |
7440 | bfd_put (8 * hash_entry_size, output_bfd, dynsymcount, | |
7441 | s->contents + hash_entry_size); | |
7442 | } | |
7443 | ||
7444 | if (info->emit_gnu_hash) | |
7445 | { | |
7446 | size_t i, cnt; | |
7447 | unsigned char *contents; | |
7448 | struct collect_gnu_hash_codes cinfo; | |
7449 | bfd_size_type amt; | |
7450 | size_t bucketcount; | |
7451 | ||
7452 | memset (&cinfo, 0, sizeof (cinfo)); | |
7453 | ||
7454 | /* Compute the hash values for all exported symbols. At the same | |
7455 | time store the values in an array so that we could use them for | |
7456 | optimizations. */ | |
7457 | amt = dynsymcount * 2 * sizeof (unsigned long int); | |
a50b1753 | 7458 | cinfo.hashcodes = (long unsigned int *) bfd_malloc (amt); |
fdc90cb4 | 7459 | if (cinfo.hashcodes == NULL) |
0a1b45a2 | 7460 | return false; |
fdc90cb4 JJ |
7461 | |
7462 | cinfo.hashval = cinfo.hashcodes + dynsymcount; | |
7463 | cinfo.min_dynindx = -1; | |
7464 | cinfo.output_bfd = output_bfd; | |
7465 | cinfo.bed = bed; | |
7466 | ||
7467 | /* Put all hash values in HASHCODES. */ | |
7468 | elf_link_hash_traverse (elf_hash_table (info), | |
7469 | elf_collect_gnu_hash_codes, &cinfo); | |
14b1c01e | 7470 | if (cinfo.error) |
4dd07732 AM |
7471 | { |
7472 | free (cinfo.hashcodes); | |
0a1b45a2 | 7473 | return false; |
4dd07732 | 7474 | } |
fdc90cb4 JJ |
7475 | |
7476 | bucketcount | |
7477 | = compute_bucket_count (info, cinfo.hashcodes, cinfo.nsyms, 1); | |
7478 | ||
7479 | if (bucketcount == 0) | |
7480 | { | |
7481 | free (cinfo.hashcodes); | |
0a1b45a2 | 7482 | return false; |
fdc90cb4 JJ |
7483 | } |
7484 | ||
f16a9783 | 7485 | s = bfd_get_linker_section (dynobj, GNU_HASH_SECTION_NAME (bed)); |
fdc90cb4 JJ |
7486 | BFD_ASSERT (s != NULL); |
7487 | ||
7488 | if (cinfo.nsyms == 0) | |
7489 | { | |
f16a9783 | 7490 | /* Empty .gnu.hash or .MIPS.xhash section is special. */ |
fdc90cb4 JJ |
7491 | BFD_ASSERT (cinfo.min_dynindx == -1); |
7492 | free (cinfo.hashcodes); | |
7493 | s->size = 5 * 4 + bed->s->arch_size / 8; | |
a50b1753 | 7494 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 | 7495 | if (contents == NULL) |
0a1b45a2 | 7496 | return false; |
fdc90cb4 JJ |
7497 | s->contents = contents; |
7498 | /* 1 empty bucket. */ | |
7499 | bfd_put_32 (output_bfd, 1, contents); | |
7500 | /* SYMIDX above the special symbol 0. */ | |
7501 | bfd_put_32 (output_bfd, 1, contents + 4); | |
7502 | /* Just one word for bitmask. */ | |
7503 | bfd_put_32 (output_bfd, 1, contents + 8); | |
7504 | /* Only hash fn bloom filter. */ | |
7505 | bfd_put_32 (output_bfd, 0, contents + 12); | |
7506 | /* No hashes are valid - empty bitmask. */ | |
7507 | bfd_put (bed->s->arch_size, output_bfd, 0, contents + 16); | |
7508 | /* No hashes in the only bucket. */ | |
7509 | bfd_put_32 (output_bfd, 0, | |
7510 | contents + 16 + bed->s->arch_size / 8); | |
7511 | } | |
7512 | else | |
7513 | { | |
9e6619e2 | 7514 | unsigned long int maskwords, maskbitslog2, x; |
0b33793d | 7515 | BFD_ASSERT (cinfo.min_dynindx != -1); |
fdc90cb4 | 7516 | |
9e6619e2 AM |
7517 | x = cinfo.nsyms; |
7518 | maskbitslog2 = 1; | |
7519 | while ((x >>= 1) != 0) | |
7520 | ++maskbitslog2; | |
fdc90cb4 JJ |
7521 | if (maskbitslog2 < 3) |
7522 | maskbitslog2 = 5; | |
7523 | else if ((1 << (maskbitslog2 - 2)) & cinfo.nsyms) | |
7524 | maskbitslog2 = maskbitslog2 + 3; | |
7525 | else | |
7526 | maskbitslog2 = maskbitslog2 + 2; | |
7527 | if (bed->s->arch_size == 64) | |
7528 | { | |
7529 | if (maskbitslog2 == 5) | |
7530 | maskbitslog2 = 6; | |
7531 | cinfo.shift1 = 6; | |
7532 | } | |
7533 | else | |
7534 | cinfo.shift1 = 5; | |
7535 | cinfo.mask = (1 << cinfo.shift1) - 1; | |
2ccdbfcc | 7536 | cinfo.shift2 = maskbitslog2; |
fdc90cb4 JJ |
7537 | cinfo.maskbits = 1 << maskbitslog2; |
7538 | maskwords = 1 << (maskbitslog2 - cinfo.shift1); | |
7539 | amt = bucketcount * sizeof (unsigned long int) * 2; | |
7540 | amt += maskwords * sizeof (bfd_vma); | |
a50b1753 | 7541 | cinfo.bitmask = (bfd_vma *) bfd_malloc (amt); |
fdc90cb4 JJ |
7542 | if (cinfo.bitmask == NULL) |
7543 | { | |
7544 | free (cinfo.hashcodes); | |
0a1b45a2 | 7545 | return false; |
fdc90cb4 JJ |
7546 | } |
7547 | ||
a50b1753 | 7548 | cinfo.counts = (long unsigned int *) (cinfo.bitmask + maskwords); |
fdc90cb4 JJ |
7549 | cinfo.indx = cinfo.counts + bucketcount; |
7550 | cinfo.symindx = dynsymcount - cinfo.nsyms; | |
7551 | memset (cinfo.bitmask, 0, maskwords * sizeof (bfd_vma)); | |
7552 | ||
7553 | /* Determine how often each hash bucket is used. */ | |
7554 | memset (cinfo.counts, 0, bucketcount * sizeof (cinfo.counts[0])); | |
7555 | for (i = 0; i < cinfo.nsyms; ++i) | |
7556 | ++cinfo.counts[cinfo.hashcodes[i] % bucketcount]; | |
7557 | ||
7558 | for (i = 0, cnt = cinfo.symindx; i < bucketcount; ++i) | |
7559 | if (cinfo.counts[i] != 0) | |
7560 | { | |
7561 | cinfo.indx[i] = cnt; | |
7562 | cnt += cinfo.counts[i]; | |
7563 | } | |
7564 | BFD_ASSERT (cnt == dynsymcount); | |
7565 | cinfo.bucketcount = bucketcount; | |
7566 | cinfo.local_indx = cinfo.min_dynindx; | |
7567 | ||
7568 | s->size = (4 + bucketcount + cinfo.nsyms) * 4; | |
7569 | s->size += cinfo.maskbits / 8; | |
f16a9783 MS |
7570 | if (bed->record_xhash_symbol != NULL) |
7571 | s->size += cinfo.nsyms * 4; | |
a50b1753 | 7572 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
7573 | if (contents == NULL) |
7574 | { | |
7575 | free (cinfo.bitmask); | |
7576 | free (cinfo.hashcodes); | |
0a1b45a2 | 7577 | return false; |
fdc90cb4 JJ |
7578 | } |
7579 | ||
7580 | s->contents = contents; | |
7581 | bfd_put_32 (output_bfd, bucketcount, contents); | |
7582 | bfd_put_32 (output_bfd, cinfo.symindx, contents + 4); | |
7583 | bfd_put_32 (output_bfd, maskwords, contents + 8); | |
7584 | bfd_put_32 (output_bfd, cinfo.shift2, contents + 12); | |
7585 | contents += 16 + cinfo.maskbits / 8; | |
7586 | ||
7587 | for (i = 0; i < bucketcount; ++i) | |
7588 | { | |
7589 | if (cinfo.counts[i] == 0) | |
7590 | bfd_put_32 (output_bfd, 0, contents); | |
7591 | else | |
7592 | bfd_put_32 (output_bfd, cinfo.indx[i], contents); | |
7593 | contents += 4; | |
7594 | } | |
7595 | ||
7596 | cinfo.contents = contents; | |
7597 | ||
f16a9783 MS |
7598 | cinfo.xlat = contents + cinfo.nsyms * 4 - s->contents; |
7599 | /* Renumber dynamic symbols, if populating .gnu.hash section. | |
7600 | If using .MIPS.xhash, populate the translation table. */ | |
fdc90cb4 | 7601 | elf_link_hash_traverse (elf_hash_table (info), |
f16a9783 | 7602 | elf_gnu_hash_process_symidx, &cinfo); |
fdc90cb4 JJ |
7603 | |
7604 | contents = s->contents + 16; | |
7605 | for (i = 0; i < maskwords; ++i) | |
7606 | { | |
7607 | bfd_put (bed->s->arch_size, output_bfd, cinfo.bitmask[i], | |
7608 | contents); | |
7609 | contents += bed->s->arch_size / 8; | |
7610 | } | |
7611 | ||
7612 | free (cinfo.bitmask); | |
7613 | free (cinfo.hashcodes); | |
7614 | } | |
7615 | } | |
5a580b3a | 7616 | |
3d4d4302 | 7617 | s = bfd_get_linker_section (dynobj, ".dynstr"); |
5a580b3a AM |
7618 | BFD_ASSERT (s != NULL); |
7619 | ||
4ad4eba5 | 7620 | elf_finalize_dynstr (output_bfd, info); |
5a580b3a | 7621 | |
eea6121a | 7622 | s->size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
5a580b3a AM |
7623 | |
7624 | for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount) | |
7625 | if (!_bfd_elf_add_dynamic_entry (info, DT_NULL, 0)) | |
0a1b45a2 | 7626 | return false; |
5a580b3a AM |
7627 | } |
7628 | ||
0a1b45a2 | 7629 | return true; |
5a580b3a | 7630 | } |
4d269e42 | 7631 | \f |
4d269e42 AM |
7632 | /* Make sure sec_info_type is cleared if sec_info is cleared too. */ |
7633 | ||
7634 | static void | |
7635 | merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED, | |
7636 | asection *sec) | |
7637 | { | |
dbaa2011 AM |
7638 | BFD_ASSERT (sec->sec_info_type == SEC_INFO_TYPE_MERGE); |
7639 | sec->sec_info_type = SEC_INFO_TYPE_NONE; | |
4d269e42 AM |
7640 | } |
7641 | ||
7642 | /* Finish SHF_MERGE section merging. */ | |
7643 | ||
0a1b45a2 | 7644 | bool |
630993ec | 7645 | _bfd_elf_merge_sections (bfd *obfd, struct bfd_link_info *info) |
4d269e42 AM |
7646 | { |
7647 | bfd *ibfd; | |
7648 | asection *sec; | |
7649 | ||
7650 | if (!is_elf_hash_table (info->hash)) | |
0a1b45a2 | 7651 | return false; |
4d269e42 | 7652 | |
c72f2fb2 | 7653 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
630993ec AM |
7654 | if ((ibfd->flags & DYNAMIC) == 0 |
7655 | && bfd_get_flavour (ibfd) == bfd_target_elf_flavour | |
017e6bce AM |
7656 | && (elf_elfheader (ibfd)->e_ident[EI_CLASS] |
7657 | == get_elf_backend_data (obfd)->s->elfclass)) | |
4d269e42 AM |
7658 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
7659 | if ((sec->flags & SEC_MERGE) != 0 | |
7660 | && !bfd_is_abs_section (sec->output_section)) | |
7661 | { | |
7662 | struct bfd_elf_section_data *secdata; | |
7663 | ||
7664 | secdata = elf_section_data (sec); | |
630993ec | 7665 | if (! _bfd_add_merge_section (obfd, |
4d269e42 AM |
7666 | &elf_hash_table (info)->merge_info, |
7667 | sec, &secdata->sec_info)) | |
0a1b45a2 | 7668 | return false; |
4d269e42 | 7669 | else if (secdata->sec_info) |
dbaa2011 | 7670 | sec->sec_info_type = SEC_INFO_TYPE_MERGE; |
4d269e42 AM |
7671 | } |
7672 | ||
7673 | if (elf_hash_table (info)->merge_info != NULL) | |
630993ec | 7674 | _bfd_merge_sections (obfd, info, elf_hash_table (info)->merge_info, |
4d269e42 | 7675 | merge_sections_remove_hook); |
0a1b45a2 | 7676 | return true; |
4d269e42 AM |
7677 | } |
7678 | ||
7679 | /* Create an entry in an ELF linker hash table. */ | |
7680 | ||
7681 | struct bfd_hash_entry * | |
7682 | _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry, | |
7683 | struct bfd_hash_table *table, | |
7684 | const char *string) | |
7685 | { | |
7686 | /* Allocate the structure if it has not already been allocated by a | |
7687 | subclass. */ | |
7688 | if (entry == NULL) | |
7689 | { | |
a50b1753 | 7690 | entry = (struct bfd_hash_entry *) |
ca4be51c | 7691 | bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)); |
4d269e42 AM |
7692 | if (entry == NULL) |
7693 | return entry; | |
7694 | } | |
7695 | ||
7696 | /* Call the allocation method of the superclass. */ | |
7697 | entry = _bfd_link_hash_newfunc (entry, table, string); | |
7698 | if (entry != NULL) | |
7699 | { | |
7700 | struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry; | |
7701 | struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table; | |
7702 | ||
7703 | /* Set local fields. */ | |
7704 | ret->indx = -1; | |
7705 | ret->dynindx = -1; | |
7706 | ret->got = htab->init_got_refcount; | |
7707 | ret->plt = htab->init_plt_refcount; | |
7708 | memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry) | |
7709 | - offsetof (struct elf_link_hash_entry, size))); | |
7710 | /* Assume that we have been called by a non-ELF symbol reader. | |
7711 | This flag is then reset by the code which reads an ELF input | |
7712 | file. This ensures that a symbol created by a non-ELF symbol | |
7713 | reader will have the flag set correctly. */ | |
7714 | ret->non_elf = 1; | |
7715 | } | |
7716 | ||
7717 | return entry; | |
7718 | } | |
7719 | ||
7720 | /* Copy data from an indirect symbol to its direct symbol, hiding the | |
7721 | old indirect symbol. Also used for copying flags to a weakdef. */ | |
7722 | ||
7723 | void | |
7724 | _bfd_elf_link_hash_copy_indirect (struct bfd_link_info *info, | |
7725 | struct elf_link_hash_entry *dir, | |
7726 | struct elf_link_hash_entry *ind) | |
7727 | { | |
7728 | struct elf_link_hash_table *htab; | |
7729 | ||
ad172eaa L |
7730 | if (ind->dyn_relocs != NULL) |
7731 | { | |
7732 | if (dir->dyn_relocs != NULL) | |
7733 | { | |
7734 | struct elf_dyn_relocs **pp; | |
7735 | struct elf_dyn_relocs *p; | |
7736 | ||
7737 | /* Add reloc counts against the indirect sym to the direct sym | |
7738 | list. Merge any entries against the same section. */ | |
7739 | for (pp = &ind->dyn_relocs; (p = *pp) != NULL; ) | |
7740 | { | |
7741 | struct elf_dyn_relocs *q; | |
7742 | ||
7743 | for (q = dir->dyn_relocs; q != NULL; q = q->next) | |
7744 | if (q->sec == p->sec) | |
7745 | { | |
7746 | q->pc_count += p->pc_count; | |
7747 | q->count += p->count; | |
7748 | *pp = p->next; | |
7749 | break; | |
7750 | } | |
7751 | if (q == NULL) | |
7752 | pp = &p->next; | |
7753 | } | |
7754 | *pp = dir->dyn_relocs; | |
7755 | } | |
7756 | ||
7757 | dir->dyn_relocs = ind->dyn_relocs; | |
7758 | ind->dyn_relocs = NULL; | |
7759 | } | |
7760 | ||
4d269e42 | 7761 | /* Copy down any references that we may have already seen to the |
e81830c5 | 7762 | symbol which just became indirect. */ |
4d269e42 | 7763 | |
422f1182 | 7764 | if (dir->versioned != versioned_hidden) |
e81830c5 AM |
7765 | dir->ref_dynamic |= ind->ref_dynamic; |
7766 | dir->ref_regular |= ind->ref_regular; | |
7767 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
7768 | dir->non_got_ref |= ind->non_got_ref; | |
7769 | dir->needs_plt |= ind->needs_plt; | |
7770 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
4d269e42 AM |
7771 | |
7772 | if (ind->root.type != bfd_link_hash_indirect) | |
7773 | return; | |
7774 | ||
7775 | /* Copy over the global and procedure linkage table refcount entries. | |
7776 | These may have been already set up by a check_relocs routine. */ | |
7777 | htab = elf_hash_table (info); | |
7778 | if (ind->got.refcount > htab->init_got_refcount.refcount) | |
7779 | { | |
7780 | if (dir->got.refcount < 0) | |
7781 | dir->got.refcount = 0; | |
7782 | dir->got.refcount += ind->got.refcount; | |
7783 | ind->got.refcount = htab->init_got_refcount.refcount; | |
7784 | } | |
7785 | ||
7786 | if (ind->plt.refcount > htab->init_plt_refcount.refcount) | |
7787 | { | |
7788 | if (dir->plt.refcount < 0) | |
7789 | dir->plt.refcount = 0; | |
7790 | dir->plt.refcount += ind->plt.refcount; | |
7791 | ind->plt.refcount = htab->init_plt_refcount.refcount; | |
7792 | } | |
7793 | ||
7794 | if (ind->dynindx != -1) | |
7795 | { | |
7796 | if (dir->dynindx != -1) | |
7797 | _bfd_elf_strtab_delref (htab->dynstr, dir->dynstr_index); | |
7798 | dir->dynindx = ind->dynindx; | |
7799 | dir->dynstr_index = ind->dynstr_index; | |
7800 | ind->dynindx = -1; | |
7801 | ind->dynstr_index = 0; | |
7802 | } | |
7803 | } | |
7804 | ||
7805 | void | |
7806 | _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info, | |
7807 | struct elf_link_hash_entry *h, | |
0a1b45a2 | 7808 | bool force_local) |
4d269e42 | 7809 | { |
3aa14d16 L |
7810 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
7811 | if (h->type != STT_GNU_IFUNC) | |
7812 | { | |
7813 | h->plt = elf_hash_table (info)->init_plt_offset; | |
7814 | h->needs_plt = 0; | |
7815 | } | |
4d269e42 AM |
7816 | if (force_local) |
7817 | { | |
7818 | h->forced_local = 1; | |
7819 | if (h->dynindx != -1) | |
7820 | { | |
4d269e42 AM |
7821 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
7822 | h->dynstr_index); | |
641338d8 AM |
7823 | h->dynindx = -1; |
7824 | h->dynstr_index = 0; | |
4d269e42 AM |
7825 | } |
7826 | } | |
7827 | } | |
7828 | ||
34a87bb0 L |
7829 | /* Hide a symbol. */ |
7830 | ||
7831 | void | |
7832 | _bfd_elf_link_hide_symbol (bfd *output_bfd, | |
7833 | struct bfd_link_info *info, | |
7834 | struct bfd_link_hash_entry *h) | |
7835 | { | |
7836 | if (is_elf_hash_table (info->hash)) | |
7837 | { | |
7838 | const struct elf_backend_data *bed | |
7839 | = get_elf_backend_data (output_bfd); | |
7840 | struct elf_link_hash_entry *eh | |
7841 | = (struct elf_link_hash_entry *) h; | |
0a1b45a2 | 7842 | bed->elf_backend_hide_symbol (info, eh, true); |
34a87bb0 L |
7843 | eh->def_dynamic = 0; |
7844 | eh->ref_dynamic = 0; | |
7845 | eh->dynamic_def = 0; | |
7846 | } | |
7847 | } | |
7848 | ||
7bf52ea2 AM |
7849 | /* Initialize an ELF linker hash table. *TABLE has been zeroed by our |
7850 | caller. */ | |
4d269e42 | 7851 | |
0a1b45a2 | 7852 | bool |
4d269e42 AM |
7853 | _bfd_elf_link_hash_table_init |
7854 | (struct elf_link_hash_table *table, | |
7855 | bfd *abfd, | |
7856 | struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *, | |
7857 | struct bfd_hash_table *, | |
7858 | const char *), | |
4dfe6ac6 NC |
7859 | unsigned int entsize, |
7860 | enum elf_target_id target_id) | |
4d269e42 | 7861 | { |
0a1b45a2 | 7862 | bool ret; |
4d269e42 AM |
7863 | int can_refcount = get_elf_backend_data (abfd)->can_refcount; |
7864 | ||
4d269e42 AM |
7865 | table->init_got_refcount.refcount = can_refcount - 1; |
7866 | table->init_plt_refcount.refcount = can_refcount - 1; | |
7867 | table->init_got_offset.offset = -(bfd_vma) 1; | |
7868 | table->init_plt_offset.offset = -(bfd_vma) 1; | |
7869 | /* The first dynamic symbol is a dummy. */ | |
7870 | table->dynsymcount = 1; | |
7871 | ||
7872 | ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); | |
4dfe6ac6 | 7873 | |
4d269e42 | 7874 | table->root.type = bfd_link_elf_hash_table; |
4dfe6ac6 | 7875 | table->hash_table_id = target_id; |
90c14f0c | 7876 | table->target_os = get_elf_backend_data (abfd)->target_os; |
4d269e42 AM |
7877 | |
7878 | return ret; | |
7879 | } | |
7880 | ||
7881 | /* Create an ELF linker hash table. */ | |
7882 | ||
7883 | struct bfd_link_hash_table * | |
7884 | _bfd_elf_link_hash_table_create (bfd *abfd) | |
7885 | { | |
7886 | struct elf_link_hash_table *ret; | |
986f0783 | 7887 | size_t amt = sizeof (struct elf_link_hash_table); |
4d269e42 | 7888 | |
7bf52ea2 | 7889 | ret = (struct elf_link_hash_table *) bfd_zmalloc (amt); |
4d269e42 AM |
7890 | if (ret == NULL) |
7891 | return NULL; | |
7892 | ||
7893 | if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc, | |
4dfe6ac6 NC |
7894 | sizeof (struct elf_link_hash_entry), |
7895 | GENERIC_ELF_DATA)) | |
4d269e42 AM |
7896 | { |
7897 | free (ret); | |
7898 | return NULL; | |
7899 | } | |
d495ab0d | 7900 | ret->root.hash_table_free = _bfd_elf_link_hash_table_free; |
4d269e42 AM |
7901 | |
7902 | return &ret->root; | |
7903 | } | |
7904 | ||
9f7c3e5e AM |
7905 | /* Destroy an ELF linker hash table. */ |
7906 | ||
7907 | void | |
d495ab0d | 7908 | _bfd_elf_link_hash_table_free (bfd *obfd) |
9f7c3e5e | 7909 | { |
d495ab0d AM |
7910 | struct elf_link_hash_table *htab; |
7911 | ||
7912 | htab = (struct elf_link_hash_table *) obfd->link.hash; | |
9f7c3e5e AM |
7913 | if (htab->dynstr != NULL) |
7914 | _bfd_elf_strtab_free (htab->dynstr); | |
7915 | _bfd_merge_sections_free (htab->merge_info); | |
d495ab0d | 7916 | _bfd_generic_link_hash_table_free (obfd); |
9f7c3e5e AM |
7917 | } |
7918 | ||
4d269e42 AM |
7919 | /* This is a hook for the ELF emulation code in the generic linker to |
7920 | tell the backend linker what file name to use for the DT_NEEDED | |
7921 | entry for a dynamic object. */ | |
7922 | ||
7923 | void | |
7924 | bfd_elf_set_dt_needed_name (bfd *abfd, const char *name) | |
7925 | { | |
7926 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7927 | && bfd_get_format (abfd) == bfd_object) | |
7928 | elf_dt_name (abfd) = name; | |
7929 | } | |
7930 | ||
7931 | int | |
7932 | bfd_elf_get_dyn_lib_class (bfd *abfd) | |
7933 | { | |
7934 | int lib_class; | |
7935 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7936 | && bfd_get_format (abfd) == bfd_object) | |
7937 | lib_class = elf_dyn_lib_class (abfd); | |
7938 | else | |
7939 | lib_class = 0; | |
7940 | return lib_class; | |
7941 | } | |
7942 | ||
7943 | void | |
7944 | bfd_elf_set_dyn_lib_class (bfd *abfd, enum dynamic_lib_link_class lib_class) | |
7945 | { | |
7946 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7947 | && bfd_get_format (abfd) == bfd_object) | |
7948 | elf_dyn_lib_class (abfd) = lib_class; | |
7949 | } | |
7950 | ||
7951 | /* Get the list of DT_NEEDED entries for a link. This is a hook for | |
7952 | the linker ELF emulation code. */ | |
7953 | ||
7954 | struct bfd_link_needed_list * | |
7955 | bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED, | |
7956 | struct bfd_link_info *info) | |
7957 | { | |
7958 | if (! is_elf_hash_table (info->hash)) | |
7959 | return NULL; | |
7960 | return elf_hash_table (info)->needed; | |
7961 | } | |
7962 | ||
7963 | /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a | |
7964 | hook for the linker ELF emulation code. */ | |
7965 | ||
7966 | struct bfd_link_needed_list * | |
7967 | bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED, | |
7968 | struct bfd_link_info *info) | |
7969 | { | |
7970 | if (! is_elf_hash_table (info->hash)) | |
7971 | return NULL; | |
7972 | return elf_hash_table (info)->runpath; | |
7973 | } | |
7974 | ||
7975 | /* Get the name actually used for a dynamic object for a link. This | |
7976 | is the SONAME entry if there is one. Otherwise, it is the string | |
7977 | passed to bfd_elf_set_dt_needed_name, or it is the filename. */ | |
7978 | ||
7979 | const char * | |
7980 | bfd_elf_get_dt_soname (bfd *abfd) | |
7981 | { | |
7982 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7983 | && bfd_get_format (abfd) == bfd_object) | |
7984 | return elf_dt_name (abfd); | |
7985 | return NULL; | |
7986 | } | |
7987 | ||
7988 | /* Get the list of DT_NEEDED entries from a BFD. This is a hook for | |
7989 | the ELF linker emulation code. */ | |
7990 | ||
0a1b45a2 | 7991 | bool |
4d269e42 AM |
7992 | bfd_elf_get_bfd_needed_list (bfd *abfd, |
7993 | struct bfd_link_needed_list **pneeded) | |
7994 | { | |
7995 | asection *s; | |
7996 | bfd_byte *dynbuf = NULL; | |
cb33740c | 7997 | unsigned int elfsec; |
4d269e42 AM |
7998 | unsigned long shlink; |
7999 | bfd_byte *extdyn, *extdynend; | |
8000 | size_t extdynsize; | |
8001 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
8002 | ||
8003 | *pneeded = NULL; | |
8004 | ||
8005 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour | |
8006 | || bfd_get_format (abfd) != bfd_object) | |
0a1b45a2 | 8007 | return true; |
4d269e42 AM |
8008 | |
8009 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
8010 | if (s == NULL || s->size == 0) | |
0a1b45a2 | 8011 | return true; |
4d269e42 AM |
8012 | |
8013 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) | |
8014 | goto error_return; | |
8015 | ||
8016 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 8017 | if (elfsec == SHN_BAD) |
4d269e42 AM |
8018 | goto error_return; |
8019 | ||
8020 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
c152c796 | 8021 | |
4d269e42 AM |
8022 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
8023 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
8024 | ||
8025 | extdyn = dynbuf; | |
8026 | extdynend = extdyn + s->size; | |
8027 | for (; extdyn < extdynend; extdyn += extdynsize) | |
8028 | { | |
8029 | Elf_Internal_Dyn dyn; | |
8030 | ||
8031 | (*swap_dyn_in) (abfd, extdyn, &dyn); | |
8032 | ||
8033 | if (dyn.d_tag == DT_NULL) | |
8034 | break; | |
8035 | ||
8036 | if (dyn.d_tag == DT_NEEDED) | |
8037 | { | |
8038 | const char *string; | |
8039 | struct bfd_link_needed_list *l; | |
8040 | unsigned int tagv = dyn.d_un.d_val; | |
986f0783 | 8041 | size_t amt; |
4d269e42 AM |
8042 | |
8043 | string = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
8044 | if (string == NULL) | |
8045 | goto error_return; | |
8046 | ||
8047 | amt = sizeof *l; | |
a50b1753 | 8048 | l = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4d269e42 AM |
8049 | if (l == NULL) |
8050 | goto error_return; | |
8051 | ||
8052 | l->by = abfd; | |
8053 | l->name = string; | |
8054 | l->next = *pneeded; | |
8055 | *pneeded = l; | |
8056 | } | |
8057 | } | |
8058 | ||
8059 | free (dynbuf); | |
8060 | ||
0a1b45a2 | 8061 | return true; |
4d269e42 AM |
8062 | |
8063 | error_return: | |
c9594989 | 8064 | free (dynbuf); |
0a1b45a2 | 8065 | return false; |
4d269e42 AM |
8066 | } |
8067 | ||
8068 | struct elf_symbuf_symbol | |
8069 | { | |
8070 | unsigned long st_name; /* Symbol name, index in string tbl */ | |
8071 | unsigned char st_info; /* Type and binding attributes */ | |
8072 | unsigned char st_other; /* Visibilty, and target specific */ | |
8073 | }; | |
8074 | ||
8075 | struct elf_symbuf_head | |
8076 | { | |
8077 | struct elf_symbuf_symbol *ssym; | |
ef53be89 | 8078 | size_t count; |
4d269e42 AM |
8079 | unsigned int st_shndx; |
8080 | }; | |
8081 | ||
8082 | struct elf_symbol | |
8083 | { | |
8084 | union | |
8085 | { | |
8086 | Elf_Internal_Sym *isym; | |
8087 | struct elf_symbuf_symbol *ssym; | |
dcea6a95 | 8088 | void *p; |
4d269e42 AM |
8089 | } u; |
8090 | const char *name; | |
8091 | }; | |
8092 | ||
8093 | /* Sort references to symbols by ascending section number. */ | |
8094 | ||
8095 | static int | |
8096 | elf_sort_elf_symbol (const void *arg1, const void *arg2) | |
8097 | { | |
8098 | const Elf_Internal_Sym *s1 = *(const Elf_Internal_Sym **) arg1; | |
8099 | const Elf_Internal_Sym *s2 = *(const Elf_Internal_Sym **) arg2; | |
8100 | ||
dcea6a95 AM |
8101 | if (s1->st_shndx != s2->st_shndx) |
8102 | return s1->st_shndx > s2->st_shndx ? 1 : -1; | |
8103 | /* Final sort by the address of the sym in the symbuf ensures | |
8104 | a stable sort. */ | |
8105 | if (s1 != s2) | |
8106 | return s1 > s2 ? 1 : -1; | |
8107 | return 0; | |
4d269e42 AM |
8108 | } |
8109 | ||
8110 | static int | |
8111 | elf_sym_name_compare (const void *arg1, const void *arg2) | |
8112 | { | |
8113 | const struct elf_symbol *s1 = (const struct elf_symbol *) arg1; | |
8114 | const struct elf_symbol *s2 = (const struct elf_symbol *) arg2; | |
dcea6a95 AM |
8115 | int ret = strcmp (s1->name, s2->name); |
8116 | if (ret != 0) | |
8117 | return ret; | |
8118 | if (s1->u.p != s2->u.p) | |
8119 | return s1->u.p > s2->u.p ? 1 : -1; | |
8120 | return 0; | |
4d269e42 AM |
8121 | } |
8122 | ||
8123 | static struct elf_symbuf_head * | |
ef53be89 | 8124 | elf_create_symbuf (size_t symcount, Elf_Internal_Sym *isymbuf) |
4d269e42 | 8125 | { |
14b1c01e | 8126 | Elf_Internal_Sym **ind, **indbufend, **indbuf; |
4d269e42 AM |
8127 | struct elf_symbuf_symbol *ssym; |
8128 | struct elf_symbuf_head *ssymbuf, *ssymhead; | |
446f7ed5 | 8129 | size_t i, shndx_count, total_size, amt; |
4d269e42 | 8130 | |
446f7ed5 AM |
8131 | amt = symcount * sizeof (*indbuf); |
8132 | indbuf = (Elf_Internal_Sym **) bfd_malloc (amt); | |
4d269e42 AM |
8133 | if (indbuf == NULL) |
8134 | return NULL; | |
8135 | ||
8136 | for (ind = indbuf, i = 0; i < symcount; i++) | |
3818d4ab | 8137 | if (isymbuf[i].st_shndx != SHN_UNDEF) |
4d269e42 AM |
8138 | *ind++ = &isymbuf[i]; |
8139 | indbufend = ind; | |
8140 | ||
8141 | qsort (indbuf, indbufend - indbuf, sizeof (Elf_Internal_Sym *), | |
8142 | elf_sort_elf_symbol); | |
8143 | ||
8144 | shndx_count = 0; | |
8145 | if (indbufend > indbuf) | |
8146 | for (ind = indbuf, shndx_count++; ind < indbufend - 1; ind++) | |
8147 | if (ind[0]->st_shndx != ind[1]->st_shndx) | |
8148 | shndx_count++; | |
8149 | ||
3ae181ee L |
8150 | total_size = ((shndx_count + 1) * sizeof (*ssymbuf) |
8151 | + (indbufend - indbuf) * sizeof (*ssym)); | |
a50b1753 | 8152 | ssymbuf = (struct elf_symbuf_head *) bfd_malloc (total_size); |
4d269e42 AM |
8153 | if (ssymbuf == NULL) |
8154 | { | |
8155 | free (indbuf); | |
8156 | return NULL; | |
8157 | } | |
8158 | ||
3ae181ee | 8159 | ssym = (struct elf_symbuf_symbol *) (ssymbuf + shndx_count + 1); |
4d269e42 AM |
8160 | ssymbuf->ssym = NULL; |
8161 | ssymbuf->count = shndx_count; | |
8162 | ssymbuf->st_shndx = 0; | |
8163 | for (ssymhead = ssymbuf, ind = indbuf; ind < indbufend; ssym++, ind++) | |
8164 | { | |
8165 | if (ind == indbuf || ssymhead->st_shndx != (*ind)->st_shndx) | |
8166 | { | |
8167 | ssymhead++; | |
8168 | ssymhead->ssym = ssym; | |
8169 | ssymhead->count = 0; | |
8170 | ssymhead->st_shndx = (*ind)->st_shndx; | |
8171 | } | |
8172 | ssym->st_name = (*ind)->st_name; | |
8173 | ssym->st_info = (*ind)->st_info; | |
8174 | ssym->st_other = (*ind)->st_other; | |
8175 | ssymhead->count++; | |
8176 | } | |
ef53be89 | 8177 | BFD_ASSERT ((size_t) (ssymhead - ssymbuf) == shndx_count |
3ae181ee L |
8178 | && (((bfd_hostptr_t) ssym - (bfd_hostptr_t) ssymbuf) |
8179 | == total_size)); | |
4d269e42 AM |
8180 | |
8181 | free (indbuf); | |
8182 | return ssymbuf; | |
8183 | } | |
8184 | ||
8185 | /* Check if 2 sections define the same set of local and global | |
8186 | symbols. */ | |
8187 | ||
0a1b45a2 | 8188 | static bool |
4d269e42 AM |
8189 | bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2, |
8190 | struct bfd_link_info *info) | |
8191 | { | |
8192 | bfd *bfd1, *bfd2; | |
8193 | const struct elf_backend_data *bed1, *bed2; | |
8194 | Elf_Internal_Shdr *hdr1, *hdr2; | |
ef53be89 | 8195 | size_t symcount1, symcount2; |
4d269e42 AM |
8196 | Elf_Internal_Sym *isymbuf1, *isymbuf2; |
8197 | struct elf_symbuf_head *ssymbuf1, *ssymbuf2; | |
8198 | Elf_Internal_Sym *isym, *isymend; | |
8199 | struct elf_symbol *symtable1 = NULL, *symtable2 = NULL; | |
3818d4ab | 8200 | size_t count1, count2, sec_count1, sec_count2, i; |
cb33740c | 8201 | unsigned int shndx1, shndx2; |
0a1b45a2 AM |
8202 | bool result; |
8203 | bool ignore_section_symbol_p; | |
4d269e42 AM |
8204 | |
8205 | bfd1 = sec1->owner; | |
8206 | bfd2 = sec2->owner; | |
8207 | ||
4d269e42 AM |
8208 | /* Both sections have to be in ELF. */ |
8209 | if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour | |
8210 | || bfd_get_flavour (bfd2) != bfd_target_elf_flavour) | |
0a1b45a2 | 8211 | return false; |
4d269e42 AM |
8212 | |
8213 | if (elf_section_type (sec1) != elf_section_type (sec2)) | |
0a1b45a2 | 8214 | return false; |
4d269e42 | 8215 | |
4d269e42 AM |
8216 | shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1); |
8217 | shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2); | |
cb33740c | 8218 | if (shndx1 == SHN_BAD || shndx2 == SHN_BAD) |
0a1b45a2 | 8219 | return false; |
4d269e42 AM |
8220 | |
8221 | bed1 = get_elf_backend_data (bfd1); | |
8222 | bed2 = get_elf_backend_data (bfd2); | |
8223 | hdr1 = &elf_tdata (bfd1)->symtab_hdr; | |
8224 | symcount1 = hdr1->sh_size / bed1->s->sizeof_sym; | |
8225 | hdr2 = &elf_tdata (bfd2)->symtab_hdr; | |
8226 | symcount2 = hdr2->sh_size / bed2->s->sizeof_sym; | |
8227 | ||
8228 | if (symcount1 == 0 || symcount2 == 0) | |
0a1b45a2 | 8229 | return false; |
4d269e42 | 8230 | |
0a1b45a2 | 8231 | result = false; |
4d269e42 AM |
8232 | isymbuf1 = NULL; |
8233 | isymbuf2 = NULL; | |
a50b1753 NC |
8234 | ssymbuf1 = (struct elf_symbuf_head *) elf_tdata (bfd1)->symbuf; |
8235 | ssymbuf2 = (struct elf_symbuf_head *) elf_tdata (bfd2)->symbuf; | |
4d269e42 | 8236 | |
3818d4ab L |
8237 | /* Ignore section symbols only when matching non-debugging sections |
8238 | or linkonce section with comdat section. */ | |
8239 | ignore_section_symbol_p | |
8240 | = ((sec1->flags & SEC_DEBUGGING) == 0 | |
8241 | || ((elf_section_flags (sec1) & SHF_GROUP) | |
8242 | != (elf_section_flags (sec2) & SHF_GROUP))); | |
8243 | ||
4d269e42 AM |
8244 | if (ssymbuf1 == NULL) |
8245 | { | |
8246 | isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0, | |
8247 | NULL, NULL, NULL); | |
8248 | if (isymbuf1 == NULL) | |
8249 | goto done; | |
8250 | ||
67411cbf | 8251 | if (info != NULL && !info->reduce_memory_overheads) |
dcea6a95 AM |
8252 | { |
8253 | ssymbuf1 = elf_create_symbuf (symcount1, isymbuf1); | |
8254 | elf_tdata (bfd1)->symbuf = ssymbuf1; | |
8255 | } | |
4d269e42 AM |
8256 | } |
8257 | ||
8258 | if (ssymbuf1 == NULL || ssymbuf2 == NULL) | |
8259 | { | |
8260 | isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0, | |
8261 | NULL, NULL, NULL); | |
8262 | if (isymbuf2 == NULL) | |
8263 | goto done; | |
8264 | ||
67411cbf | 8265 | if (ssymbuf1 != NULL && info != NULL && !info->reduce_memory_overheads) |
dcea6a95 AM |
8266 | { |
8267 | ssymbuf2 = elf_create_symbuf (symcount2, isymbuf2); | |
8268 | elf_tdata (bfd2)->symbuf = ssymbuf2; | |
8269 | } | |
4d269e42 AM |
8270 | } |
8271 | ||
8272 | if (ssymbuf1 != NULL && ssymbuf2 != NULL) | |
8273 | { | |
8274 | /* Optimized faster version. */ | |
ef53be89 | 8275 | size_t lo, hi, mid; |
4d269e42 AM |
8276 | struct elf_symbol *symp; |
8277 | struct elf_symbuf_symbol *ssym, *ssymend; | |
8278 | ||
8279 | lo = 0; | |
8280 | hi = ssymbuf1->count; | |
8281 | ssymbuf1++; | |
8282 | count1 = 0; | |
3818d4ab | 8283 | sec_count1 = 0; |
4d269e42 AM |
8284 | while (lo < hi) |
8285 | { | |
8286 | mid = (lo + hi) / 2; | |
cb33740c | 8287 | if (shndx1 < ssymbuf1[mid].st_shndx) |
4d269e42 | 8288 | hi = mid; |
cb33740c | 8289 | else if (shndx1 > ssymbuf1[mid].st_shndx) |
4d269e42 AM |
8290 | lo = mid + 1; |
8291 | else | |
8292 | { | |
8293 | count1 = ssymbuf1[mid].count; | |
8294 | ssymbuf1 += mid; | |
8295 | break; | |
8296 | } | |
8297 | } | |
3818d4ab L |
8298 | if (ignore_section_symbol_p) |
8299 | { | |
8300 | for (i = 0; i < count1; i++) | |
8301 | if (ELF_ST_TYPE (ssymbuf1->ssym[i].st_info) == STT_SECTION) | |
8302 | sec_count1++; | |
8303 | count1 -= sec_count1; | |
8304 | } | |
4d269e42 AM |
8305 | |
8306 | lo = 0; | |
8307 | hi = ssymbuf2->count; | |
8308 | ssymbuf2++; | |
8309 | count2 = 0; | |
3818d4ab | 8310 | sec_count2 = 0; |
4d269e42 AM |
8311 | while (lo < hi) |
8312 | { | |
8313 | mid = (lo + hi) / 2; | |
cb33740c | 8314 | if (shndx2 < ssymbuf2[mid].st_shndx) |
4d269e42 | 8315 | hi = mid; |
cb33740c | 8316 | else if (shndx2 > ssymbuf2[mid].st_shndx) |
4d269e42 AM |
8317 | lo = mid + 1; |
8318 | else | |
8319 | { | |
8320 | count2 = ssymbuf2[mid].count; | |
8321 | ssymbuf2 += mid; | |
8322 | break; | |
8323 | } | |
8324 | } | |
3818d4ab L |
8325 | if (ignore_section_symbol_p) |
8326 | { | |
8327 | for (i = 0; i < count2; i++) | |
8328 | if (ELF_ST_TYPE (ssymbuf2->ssym[i].st_info) == STT_SECTION) | |
8329 | sec_count2++; | |
8330 | count2 -= sec_count2; | |
8331 | } | |
4d269e42 AM |
8332 | |
8333 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
8334 | goto done; | |
8335 | ||
ca4be51c AM |
8336 | symtable1 |
8337 | = (struct elf_symbol *) bfd_malloc (count1 * sizeof (*symtable1)); | |
8338 | symtable2 | |
8339 | = (struct elf_symbol *) bfd_malloc (count2 * sizeof (*symtable2)); | |
4d269e42 AM |
8340 | if (symtable1 == NULL || symtable2 == NULL) |
8341 | goto done; | |
8342 | ||
8343 | symp = symtable1; | |
3818d4ab L |
8344 | for (ssym = ssymbuf1->ssym, ssymend = ssym + count1 + sec_count1; |
8345 | ssym < ssymend; ssym++) | |
8346 | if (sec_count1 == 0 | |
8347 | || ELF_ST_TYPE (ssym->st_info) != STT_SECTION) | |
8348 | { | |
8349 | symp->u.ssym = ssym; | |
8350 | symp->name = bfd_elf_string_from_elf_section (bfd1, | |
8351 | hdr1->sh_link, | |
8352 | ssym->st_name); | |
8353 | symp++; | |
8354 | } | |
4d269e42 AM |
8355 | |
8356 | symp = symtable2; | |
3818d4ab L |
8357 | for (ssym = ssymbuf2->ssym, ssymend = ssym + count2 + sec_count2; |
8358 | ssym < ssymend; ssym++) | |
8359 | if (sec_count2 == 0 | |
8360 | || ELF_ST_TYPE (ssym->st_info) != STT_SECTION) | |
8361 | { | |
8362 | symp->u.ssym = ssym; | |
8363 | symp->name = bfd_elf_string_from_elf_section (bfd2, | |
8364 | hdr2->sh_link, | |
8365 | ssym->st_name); | |
8366 | symp++; | |
8367 | } | |
4d269e42 AM |
8368 | |
8369 | /* Sort symbol by name. */ | |
8370 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
8371 | elf_sym_name_compare); | |
8372 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
8373 | elf_sym_name_compare); | |
8374 | ||
8375 | for (i = 0; i < count1; i++) | |
8376 | /* Two symbols must have the same binding, type and name. */ | |
8377 | if (symtable1 [i].u.ssym->st_info != symtable2 [i].u.ssym->st_info | |
8378 | || symtable1 [i].u.ssym->st_other != symtable2 [i].u.ssym->st_other | |
8379 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
8380 | goto done; | |
8381 | ||
0a1b45a2 | 8382 | result = true; |
4d269e42 AM |
8383 | goto done; |
8384 | } | |
8385 | ||
a50b1753 NC |
8386 | symtable1 = (struct elf_symbol *) |
8387 | bfd_malloc (symcount1 * sizeof (struct elf_symbol)); | |
8388 | symtable2 = (struct elf_symbol *) | |
8389 | bfd_malloc (symcount2 * sizeof (struct elf_symbol)); | |
4d269e42 AM |
8390 | if (symtable1 == NULL || symtable2 == NULL) |
8391 | goto done; | |
8392 | ||
8393 | /* Count definitions in the section. */ | |
8394 | count1 = 0; | |
8395 | for (isym = isymbuf1, isymend = isym + symcount1; isym < isymend; isym++) | |
3818d4ab L |
8396 | if (isym->st_shndx == shndx1 |
8397 | && (!ignore_section_symbol_p | |
8398 | || ELF_ST_TYPE (isym->st_info) != STT_SECTION)) | |
4d269e42 AM |
8399 | symtable1[count1++].u.isym = isym; |
8400 | ||
8401 | count2 = 0; | |
8402 | for (isym = isymbuf2, isymend = isym + symcount2; isym < isymend; isym++) | |
3818d4ab L |
8403 | if (isym->st_shndx == shndx2 |
8404 | && (!ignore_section_symbol_p | |
8405 | || ELF_ST_TYPE (isym->st_info) != STT_SECTION)) | |
4d269e42 AM |
8406 | symtable2[count2++].u.isym = isym; |
8407 | ||
8408 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
8409 | goto done; | |
8410 | ||
8411 | for (i = 0; i < count1; i++) | |
8412 | symtable1[i].name | |
8413 | = bfd_elf_string_from_elf_section (bfd1, hdr1->sh_link, | |
8414 | symtable1[i].u.isym->st_name); | |
8415 | ||
8416 | for (i = 0; i < count2; i++) | |
8417 | symtable2[i].name | |
8418 | = bfd_elf_string_from_elf_section (bfd2, hdr2->sh_link, | |
8419 | symtable2[i].u.isym->st_name); | |
8420 | ||
8421 | /* Sort symbol by name. */ | |
8422 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
8423 | elf_sym_name_compare); | |
8424 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
8425 | elf_sym_name_compare); | |
8426 | ||
8427 | for (i = 0; i < count1; i++) | |
8428 | /* Two symbols must have the same binding, type and name. */ | |
8429 | if (symtable1 [i].u.isym->st_info != symtable2 [i].u.isym->st_info | |
8430 | || symtable1 [i].u.isym->st_other != symtable2 [i].u.isym->st_other | |
8431 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
8432 | goto done; | |
8433 | ||
0a1b45a2 | 8434 | result = true; |
4d269e42 | 8435 | |
dc1e8a47 | 8436 | done: |
c9594989 AM |
8437 | free (symtable1); |
8438 | free (symtable2); | |
8439 | free (isymbuf1); | |
8440 | free (isymbuf2); | |
4d269e42 AM |
8441 | |
8442 | return result; | |
8443 | } | |
8444 | ||
8445 | /* Return TRUE if 2 section types are compatible. */ | |
8446 | ||
0a1b45a2 | 8447 | bool |
4d269e42 AM |
8448 | _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec, |
8449 | bfd *bbfd, const asection *bsec) | |
8450 | { | |
8451 | if (asec == NULL | |
8452 | || bsec == NULL | |
8453 | || abfd->xvec->flavour != bfd_target_elf_flavour | |
8454 | || bbfd->xvec->flavour != bfd_target_elf_flavour) | |
0a1b45a2 | 8455 | return true; |
4d269e42 AM |
8456 | |
8457 | return elf_section_type (asec) == elf_section_type (bsec); | |
8458 | } | |
8459 | \f | |
c152c796 AM |
8460 | /* Final phase of ELF linker. */ |
8461 | ||
8462 | /* A structure we use to avoid passing large numbers of arguments. */ | |
8463 | ||
8464 | struct elf_final_link_info | |
8465 | { | |
8466 | /* General link information. */ | |
8467 | struct bfd_link_info *info; | |
8468 | /* Output BFD. */ | |
8469 | bfd *output_bfd; | |
8470 | /* Symbol string table. */ | |
ef10c3ac | 8471 | struct elf_strtab_hash *symstrtab; |
c152c796 AM |
8472 | /* .hash section. */ |
8473 | asection *hash_sec; | |
8474 | /* symbol version section (.gnu.version). */ | |
8475 | asection *symver_sec; | |
8476 | /* Buffer large enough to hold contents of any section. */ | |
8477 | bfd_byte *contents; | |
8478 | /* Buffer large enough to hold external relocs of any section. */ | |
8479 | void *external_relocs; | |
8480 | /* Buffer large enough to hold internal relocs of any section. */ | |
8481 | Elf_Internal_Rela *internal_relocs; | |
8482 | /* Buffer large enough to hold external local symbols of any input | |
8483 | BFD. */ | |
8484 | bfd_byte *external_syms; | |
8485 | /* And a buffer for symbol section indices. */ | |
8486 | Elf_External_Sym_Shndx *locsym_shndx; | |
8487 | /* Buffer large enough to hold internal local symbols of any input | |
8488 | BFD. */ | |
8489 | Elf_Internal_Sym *internal_syms; | |
8490 | /* Array large enough to hold a symbol index for each local symbol | |
8491 | of any input BFD. */ | |
8492 | long *indices; | |
8493 | /* Array large enough to hold a section pointer for each local | |
8494 | symbol of any input BFD. */ | |
8495 | asection **sections; | |
ef10c3ac | 8496 | /* Buffer for SHT_SYMTAB_SHNDX section. */ |
c152c796 | 8497 | Elf_External_Sym_Shndx *symshndxbuf; |
ffbc01cc AM |
8498 | /* Number of STT_FILE syms seen. */ |
8499 | size_t filesym_count; | |
496afd17 L |
8500 | /* Local symbol hash table. */ |
8501 | struct bfd_hash_table local_hash_table; | |
c152c796 AM |
8502 | }; |
8503 | ||
496afd17 L |
8504 | struct local_hash_entry |
8505 | { | |
8506 | /* Base hash table entry structure. */ | |
8507 | struct bfd_hash_entry root; | |
8508 | /* Size of the local symbol name. */ | |
8509 | size_t size; | |
8510 | /* Number of the duplicated local symbol names. */ | |
8511 | long count; | |
8512 | }; | |
8513 | ||
8514 | /* Create an entry in the local symbol hash table. */ | |
8515 | ||
8516 | static struct bfd_hash_entry * | |
8517 | local_hash_newfunc (struct bfd_hash_entry *entry, | |
8518 | struct bfd_hash_table *table, | |
8519 | const char *string) | |
8520 | { | |
8521 | ||
8522 | /* Allocate the structure if it has not already been allocated by a | |
8523 | subclass. */ | |
8524 | if (entry == NULL) | |
8525 | { | |
8526 | entry = bfd_hash_allocate (table, | |
8527 | sizeof (struct local_hash_entry)); | |
8528 | if (entry == NULL) | |
8529 | return entry; | |
8530 | } | |
8531 | ||
8532 | /* Call the allocation method of the superclass. */ | |
8533 | entry = bfd_hash_newfunc (entry, table, string); | |
8534 | if (entry != NULL) | |
8535 | { | |
8536 | ((struct local_hash_entry *) entry)->count = 0; | |
8537 | ((struct local_hash_entry *) entry)->size = 0; | |
8538 | } | |
8539 | ||
8540 | return entry; | |
8541 | } | |
8542 | ||
c152c796 AM |
8543 | /* This struct is used to pass information to elf_link_output_extsym. */ |
8544 | ||
8545 | struct elf_outext_info | |
8546 | { | |
0a1b45a2 AM |
8547 | bool failed; |
8548 | bool localsyms; | |
8549 | bool file_sym_done; | |
8b127cbc | 8550 | struct elf_final_link_info *flinfo; |
c152c796 AM |
8551 | }; |
8552 | ||
d9352518 DB |
8553 | |
8554 | /* Support for evaluating a complex relocation. | |
8555 | ||
8556 | Complex relocations are generalized, self-describing relocations. The | |
8557 | implementation of them consists of two parts: complex symbols, and the | |
a0c8462f | 8558 | relocations themselves. |
d9352518 | 8559 | |
4b69ce9b | 8560 | The relocations use a reserved elf-wide relocation type code (R_RELC |
d9352518 DB |
8561 | external / BFD_RELOC_RELC internal) and an encoding of relocation field |
8562 | information (start bit, end bit, word width, etc) into the addend. This | |
8563 | information is extracted from CGEN-generated operand tables within gas. | |
8564 | ||
4b69ce9b | 8565 | Complex symbols are mangled symbols (STT_RELC external / BSF_RELC |
d9352518 DB |
8566 | internal) representing prefix-notation expressions, including but not |
8567 | limited to those sorts of expressions normally encoded as addends in the | |
8568 | addend field. The symbol mangling format is: | |
8569 | ||
8570 | <node> := <literal> | |
07d6d2b8 AM |
8571 | | <unary-operator> ':' <node> |
8572 | | <binary-operator> ':' <node> ':' <node> | |
d9352518 DB |
8573 | ; |
8574 | ||
8575 | <literal> := 's' <digits=N> ':' <N character symbol name> | |
07d6d2b8 | 8576 | | 'S' <digits=N> ':' <N character section name> |
d9352518 DB |
8577 | | '#' <hexdigits> |
8578 | ; | |
8579 | ||
8580 | <binary-operator> := as in C | |
8581 | <unary-operator> := as in C, plus "0-" for unambiguous negation. */ | |
8582 | ||
8583 | static void | |
a0c8462f AM |
8584 | set_symbol_value (bfd *bfd_with_globals, |
8585 | Elf_Internal_Sym *isymbuf, | |
8586 | size_t locsymcount, | |
8587 | size_t symidx, | |
8588 | bfd_vma val) | |
d9352518 | 8589 | { |
8977835c AM |
8590 | struct elf_link_hash_entry **sym_hashes; |
8591 | struct elf_link_hash_entry *h; | |
8592 | size_t extsymoff = locsymcount; | |
d9352518 | 8593 | |
8977835c | 8594 | if (symidx < locsymcount) |
d9352518 | 8595 | { |
8977835c AM |
8596 | Elf_Internal_Sym *sym; |
8597 | ||
8598 | sym = isymbuf + symidx; | |
8599 | if (ELF_ST_BIND (sym->st_info) == STB_LOCAL) | |
8600 | { | |
8601 | /* It is a local symbol: move it to the | |
8602 | "absolute" section and give it a value. */ | |
8603 | sym->st_shndx = SHN_ABS; | |
8604 | sym->st_value = val; | |
8605 | return; | |
8606 | } | |
8607 | BFD_ASSERT (elf_bad_symtab (bfd_with_globals)); | |
8608 | extsymoff = 0; | |
d9352518 | 8609 | } |
8977835c AM |
8610 | |
8611 | /* It is a global symbol: set its link type | |
8612 | to "defined" and give it a value. */ | |
8613 | ||
8614 | sym_hashes = elf_sym_hashes (bfd_with_globals); | |
8615 | h = sym_hashes [symidx - extsymoff]; | |
8616 | while (h->root.type == bfd_link_hash_indirect | |
8617 | || h->root.type == bfd_link_hash_warning) | |
8618 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8619 | h->root.type = bfd_link_hash_defined; | |
8620 | h->root.u.def.value = val; | |
8621 | h->root.u.def.section = bfd_abs_section_ptr; | |
d9352518 DB |
8622 | } |
8623 | ||
0a1b45a2 | 8624 | static bool |
a0c8462f AM |
8625 | resolve_symbol (const char *name, |
8626 | bfd *input_bfd, | |
8b127cbc | 8627 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
8628 | bfd_vma *result, |
8629 | Elf_Internal_Sym *isymbuf, | |
8630 | size_t locsymcount) | |
d9352518 | 8631 | { |
a0c8462f AM |
8632 | Elf_Internal_Sym *sym; |
8633 | struct bfd_link_hash_entry *global_entry; | |
8634 | const char *candidate = NULL; | |
8635 | Elf_Internal_Shdr *symtab_hdr; | |
8636 | size_t i; | |
8637 | ||
d9352518 DB |
8638 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
8639 | ||
8640 | for (i = 0; i < locsymcount; ++ i) | |
8641 | { | |
8977835c | 8642 | sym = isymbuf + i; |
d9352518 DB |
8643 | |
8644 | if (ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
8645 | continue; | |
8646 | ||
8647 | candidate = bfd_elf_string_from_elf_section (input_bfd, | |
8648 | symtab_hdr->sh_link, | |
8649 | sym->st_name); | |
8650 | #ifdef DEBUG | |
0f02bbd9 AM |
8651 | printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n", |
8652 | name, candidate, (unsigned long) sym->st_value); | |
d9352518 DB |
8653 | #endif |
8654 | if (candidate && strcmp (candidate, name) == 0) | |
8655 | { | |
8b127cbc | 8656 | asection *sec = flinfo->sections [i]; |
d9352518 | 8657 | |
0f02bbd9 AM |
8658 | *result = _bfd_elf_rel_local_sym (input_bfd, sym, &sec, 0); |
8659 | *result += sec->output_offset + sec->output_section->vma; | |
d9352518 | 8660 | #ifdef DEBUG |
0f02bbd9 AM |
8661 | printf ("Found symbol with value %8.8lx\n", |
8662 | (unsigned long) *result); | |
d9352518 | 8663 | #endif |
0a1b45a2 | 8664 | return true; |
d9352518 DB |
8665 | } |
8666 | } | |
8667 | ||
8668 | /* Hmm, haven't found it yet. perhaps it is a global. */ | |
8b127cbc | 8669 | global_entry = bfd_link_hash_lookup (flinfo->info->hash, name, |
0a1b45a2 | 8670 | false, false, true); |
d9352518 | 8671 | if (!global_entry) |
0a1b45a2 | 8672 | return false; |
a0c8462f | 8673 | |
d9352518 DB |
8674 | if (global_entry->type == bfd_link_hash_defined |
8675 | || global_entry->type == bfd_link_hash_defweak) | |
8676 | { | |
a0c8462f AM |
8677 | *result = (global_entry->u.def.value |
8678 | + global_entry->u.def.section->output_section->vma | |
8679 | + global_entry->u.def.section->output_offset); | |
d9352518 | 8680 | #ifdef DEBUG |
0f02bbd9 AM |
8681 | printf ("Found GLOBAL symbol '%s' with value %8.8lx\n", |
8682 | global_entry->root.string, (unsigned long) *result); | |
d9352518 | 8683 | #endif |
0a1b45a2 | 8684 | return true; |
a0c8462f | 8685 | } |
d9352518 | 8686 | |
0a1b45a2 | 8687 | return false; |
d9352518 DB |
8688 | } |
8689 | ||
37b01f6a DG |
8690 | /* Looks up NAME in SECTIONS. If found sets RESULT to NAME's address (in |
8691 | bytes) and returns TRUE, otherwise returns FALSE. Accepts pseudo-section | |
8692 | names like "foo.end" which is the end address of section "foo". */ | |
07d6d2b8 | 8693 | |
0a1b45a2 | 8694 | static bool |
a0c8462f AM |
8695 | resolve_section (const char *name, |
8696 | asection *sections, | |
37b01f6a DG |
8697 | bfd_vma *result, |
8698 | bfd * abfd) | |
d9352518 | 8699 | { |
a0c8462f AM |
8700 | asection *curr; |
8701 | unsigned int len; | |
d9352518 | 8702 | |
a0c8462f | 8703 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
8704 | if (strcmp (curr->name, name) == 0) |
8705 | { | |
8706 | *result = curr->vma; | |
0a1b45a2 | 8707 | return true; |
d9352518 DB |
8708 | } |
8709 | ||
8710 | /* Hmm. still haven't found it. try pseudo-section names. */ | |
37b01f6a | 8711 | /* FIXME: This could be coded more efficiently... */ |
a0c8462f | 8712 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
8713 | { |
8714 | len = strlen (curr->name); | |
a0c8462f | 8715 | if (len > strlen (name)) |
d9352518 DB |
8716 | continue; |
8717 | ||
8718 | if (strncmp (curr->name, name, len) == 0) | |
8719 | { | |
3f3328b8 | 8720 | if (startswith (name + len, ".end")) |
d9352518 | 8721 | { |
61826503 | 8722 | *result = (curr->vma |
bb294208 | 8723 | + curr->size / bfd_octets_per_byte (abfd, curr)); |
0a1b45a2 | 8724 | return true; |
d9352518 DB |
8725 | } |
8726 | ||
8727 | /* Insert more pseudo-section names here, if you like. */ | |
8728 | } | |
8729 | } | |
a0c8462f | 8730 | |
0a1b45a2 | 8731 | return false; |
d9352518 DB |
8732 | } |
8733 | ||
8734 | static void | |
a0c8462f | 8735 | undefined_reference (const char *reftype, const char *name) |
d9352518 | 8736 | { |
695344c0 | 8737 | /* xgettext:c-format */ |
a0c8462f AM |
8738 | _bfd_error_handler (_("undefined %s reference in complex symbol: %s"), |
8739 | reftype, name); | |
4b69ce9b | 8740 | bfd_set_error (bfd_error_bad_value); |
d9352518 DB |
8741 | } |
8742 | ||
0a1b45a2 | 8743 | static bool |
a0c8462f AM |
8744 | eval_symbol (bfd_vma *result, |
8745 | const char **symp, | |
8746 | bfd *input_bfd, | |
8b127cbc | 8747 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
8748 | bfd_vma dot, |
8749 | Elf_Internal_Sym *isymbuf, | |
8750 | size_t locsymcount, | |
8751 | int signed_p) | |
d9352518 | 8752 | { |
4b93929b NC |
8753 | size_t len; |
8754 | size_t symlen; | |
a0c8462f AM |
8755 | bfd_vma a; |
8756 | bfd_vma b; | |
4b93929b | 8757 | char symbuf[4096]; |
0f02bbd9 | 8758 | const char *sym = *symp; |
a0c8462f | 8759 | const char *symend; |
0a1b45a2 | 8760 | bool symbol_is_section = false; |
d9352518 DB |
8761 | |
8762 | len = strlen (sym); | |
8763 | symend = sym + len; | |
8764 | ||
4b93929b | 8765 | if (len < 1 || len > sizeof (symbuf)) |
d9352518 DB |
8766 | { |
8767 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 8768 | return false; |
d9352518 | 8769 | } |
a0c8462f | 8770 | |
d9352518 DB |
8771 | switch (* sym) |
8772 | { | |
8773 | case '.': | |
0f02bbd9 AM |
8774 | *result = dot; |
8775 | *symp = sym + 1; | |
0a1b45a2 | 8776 | return true; |
d9352518 DB |
8777 | |
8778 | case '#': | |
0f02bbd9 AM |
8779 | ++sym; |
8780 | *result = strtoul (sym, (char **) symp, 16); | |
0a1b45a2 | 8781 | return true; |
d9352518 DB |
8782 | |
8783 | case 'S': | |
0a1b45a2 | 8784 | symbol_is_section = true; |
1a0670f3 | 8785 | /* Fall through. */ |
a0c8462f | 8786 | case 's': |
0f02bbd9 AM |
8787 | ++sym; |
8788 | symlen = strtol (sym, (char **) symp, 10); | |
8789 | sym = *symp + 1; /* Skip the trailing ':'. */ | |
d9352518 | 8790 | |
4b93929b | 8791 | if (symend < sym || symlen + 1 > sizeof (symbuf)) |
d9352518 DB |
8792 | { |
8793 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 8794 | return false; |
d9352518 DB |
8795 | } |
8796 | ||
8797 | memcpy (symbuf, sym, symlen); | |
a0c8462f | 8798 | symbuf[symlen] = '\0'; |
0f02bbd9 | 8799 | *symp = sym + symlen; |
a0c8462f AM |
8800 | |
8801 | /* Is it always possible, with complex symbols, that gas "mis-guessed" | |
d9352518 DB |
8802 | the symbol as a section, or vice-versa. so we're pretty liberal in our |
8803 | interpretation here; section means "try section first", not "must be a | |
8804 | section", and likewise with symbol. */ | |
8805 | ||
a0c8462f | 8806 | if (symbol_is_section) |
d9352518 | 8807 | { |
37b01f6a | 8808 | if (!resolve_section (symbuf, flinfo->output_bfd->sections, result, input_bfd) |
8b127cbc | 8809 | && !resolve_symbol (symbuf, input_bfd, flinfo, result, |
8977835c | 8810 | isymbuf, locsymcount)) |
d9352518 DB |
8811 | { |
8812 | undefined_reference ("section", symbuf); | |
0a1b45a2 | 8813 | return false; |
d9352518 | 8814 | } |
a0c8462f AM |
8815 | } |
8816 | else | |
d9352518 | 8817 | { |
8b127cbc | 8818 | if (!resolve_symbol (symbuf, input_bfd, flinfo, result, |
8977835c | 8819 | isymbuf, locsymcount) |
8b127cbc | 8820 | && !resolve_section (symbuf, flinfo->output_bfd->sections, |
37b01f6a | 8821 | result, input_bfd)) |
d9352518 DB |
8822 | { |
8823 | undefined_reference ("symbol", symbuf); | |
0a1b45a2 | 8824 | return false; |
d9352518 DB |
8825 | } |
8826 | } | |
8827 | ||
0a1b45a2 | 8828 | return true; |
a0c8462f | 8829 | |
d9352518 DB |
8830 | /* All that remains are operators. */ |
8831 | ||
8832 | #define UNARY_OP(op) \ | |
3f3328b8 | 8833 | if (startswith (sym, #op)) \ |
d9352518 DB |
8834 | { \ |
8835 | sym += strlen (#op); \ | |
a0c8462f AM |
8836 | if (*sym == ':') \ |
8837 | ++sym; \ | |
0f02bbd9 | 8838 | *symp = sym; \ |
8b127cbc | 8839 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 8840 | isymbuf, locsymcount, signed_p)) \ |
0a1b45a2 | 8841 | return false; \ |
a0c8462f | 8842 | if (signed_p) \ |
0f02bbd9 | 8843 | *result = op ((bfd_signed_vma) a); \ |
a0c8462f AM |
8844 | else \ |
8845 | *result = op a; \ | |
0a1b45a2 | 8846 | return true; \ |
d9352518 DB |
8847 | } |
8848 | ||
4b69ce9b | 8849 | #define BINARY_OP_HEAD(op) \ |
3f3328b8 | 8850 | if (startswith (sym, #op)) \ |
d9352518 DB |
8851 | { \ |
8852 | sym += strlen (#op); \ | |
a0c8462f AM |
8853 | if (*sym == ':') \ |
8854 | ++sym; \ | |
0f02bbd9 | 8855 | *symp = sym; \ |
8b127cbc | 8856 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 8857 | isymbuf, locsymcount, signed_p)) \ |
0a1b45a2 | 8858 | return false; \ |
0f02bbd9 | 8859 | ++*symp; \ |
8b127cbc | 8860 | if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 8861 | isymbuf, locsymcount, signed_p)) \ |
0a1b45a2 | 8862 | return false; |
4b69ce9b | 8863 | #define BINARY_OP_TAIL(op) \ |
a0c8462f | 8864 | if (signed_p) \ |
0f02bbd9 | 8865 | *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \ |
a0c8462f AM |
8866 | else \ |
8867 | *result = a op b; \ | |
0a1b45a2 | 8868 | return true; \ |
d9352518 | 8869 | } |
4b69ce9b | 8870 | #define BINARY_OP(op) BINARY_OP_HEAD(op) BINARY_OP_TAIL(op) |
d9352518 DB |
8871 | |
8872 | default: | |
8873 | UNARY_OP (0-); | |
4b69ce9b AM |
8874 | BINARY_OP_HEAD (<<); |
8875 | if (b >= sizeof (a) * CHAR_BIT) | |
8876 | { | |
8877 | *result = 0; | |
0a1b45a2 | 8878 | return true; |
4b69ce9b AM |
8879 | } |
8880 | signed_p = 0; | |
8881 | BINARY_OP_TAIL (<<); | |
8882 | BINARY_OP_HEAD (>>); | |
8883 | if (b >= sizeof (a) * CHAR_BIT) | |
8884 | { | |
8885 | *result = signed_p && (bfd_signed_vma) a < 0 ? -1 : 0; | |
0a1b45a2 | 8886 | return true; |
4b69ce9b AM |
8887 | } |
8888 | BINARY_OP_TAIL (>>); | |
d9352518 DB |
8889 | BINARY_OP (==); |
8890 | BINARY_OP (!=); | |
8891 | BINARY_OP (<=); | |
8892 | BINARY_OP (>=); | |
8893 | BINARY_OP (&&); | |
8894 | BINARY_OP (||); | |
8895 | UNARY_OP (~); | |
8896 | UNARY_OP (!); | |
8897 | BINARY_OP (*); | |
4b69ce9b AM |
8898 | BINARY_OP_HEAD (/); |
8899 | if (b == 0) | |
8900 | { | |
8901 | _bfd_error_handler (_("division by zero")); | |
8902 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 8903 | return false; |
4b69ce9b AM |
8904 | } |
8905 | BINARY_OP_TAIL (/); | |
8906 | BINARY_OP_HEAD (%); | |
8907 | if (b == 0) | |
8908 | { | |
8909 | _bfd_error_handler (_("division by zero")); | |
8910 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 8911 | return false; |
4b69ce9b AM |
8912 | } |
8913 | BINARY_OP_TAIL (%); | |
d9352518 DB |
8914 | BINARY_OP (^); |
8915 | BINARY_OP (|); | |
8916 | BINARY_OP (&); | |
8917 | BINARY_OP (+); | |
8918 | BINARY_OP (-); | |
8919 | BINARY_OP (<); | |
8920 | BINARY_OP (>); | |
8921 | #undef UNARY_OP | |
8922 | #undef BINARY_OP | |
8923 | _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym); | |
8924 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 8925 | return false; |
d9352518 DB |
8926 | } |
8927 | } | |
8928 | ||
d9352518 | 8929 | static void |
a0c8462f AM |
8930 | put_value (bfd_vma size, |
8931 | unsigned long chunksz, | |
8932 | bfd *input_bfd, | |
8933 | bfd_vma x, | |
8934 | bfd_byte *location) | |
d9352518 DB |
8935 | { |
8936 | location += (size - chunksz); | |
8937 | ||
41cd1ad1 | 8938 | for (; size; size -= chunksz, location -= chunksz) |
d9352518 DB |
8939 | { |
8940 | switch (chunksz) | |
8941 | { | |
d9352518 DB |
8942 | case 1: |
8943 | bfd_put_8 (input_bfd, x, location); | |
41cd1ad1 | 8944 | x >>= 8; |
d9352518 DB |
8945 | break; |
8946 | case 2: | |
8947 | bfd_put_16 (input_bfd, x, location); | |
41cd1ad1 | 8948 | x >>= 16; |
d9352518 DB |
8949 | break; |
8950 | case 4: | |
8951 | bfd_put_32 (input_bfd, x, location); | |
65164438 NC |
8952 | /* Computed this way because x >>= 32 is undefined if x is a 32-bit value. */ |
8953 | x >>= 16; | |
8954 | x >>= 16; | |
d9352518 | 8955 | break; |
d9352518 | 8956 | #ifdef BFD64 |
41cd1ad1 | 8957 | case 8: |
d9352518 | 8958 | bfd_put_64 (input_bfd, x, location); |
41cd1ad1 NC |
8959 | /* Computed this way because x >>= 64 is undefined if x is a 64-bit value. */ |
8960 | x >>= 32; | |
8961 | x >>= 32; | |
8962 | break; | |
d9352518 | 8963 | #endif |
41cd1ad1 NC |
8964 | default: |
8965 | abort (); | |
d9352518 DB |
8966 | break; |
8967 | } | |
8968 | } | |
8969 | } | |
8970 | ||
a0c8462f AM |
8971 | static bfd_vma |
8972 | get_value (bfd_vma size, | |
8973 | unsigned long chunksz, | |
8974 | bfd *input_bfd, | |
8975 | bfd_byte *location) | |
d9352518 | 8976 | { |
9b239e0e | 8977 | int shift; |
d9352518 DB |
8978 | bfd_vma x = 0; |
8979 | ||
9b239e0e NC |
8980 | /* Sanity checks. */ |
8981 | BFD_ASSERT (chunksz <= sizeof (x) | |
8982 | && size >= chunksz | |
8983 | && chunksz != 0 | |
8984 | && (size % chunksz) == 0 | |
8985 | && input_bfd != NULL | |
8986 | && location != NULL); | |
8987 | ||
8988 | if (chunksz == sizeof (x)) | |
8989 | { | |
8990 | BFD_ASSERT (size == chunksz); | |
8991 | ||
8992 | /* Make sure that we do not perform an undefined shift operation. | |
8993 | We know that size == chunksz so there will only be one iteration | |
8994 | of the loop below. */ | |
8995 | shift = 0; | |
8996 | } | |
8997 | else | |
8998 | shift = 8 * chunksz; | |
8999 | ||
a0c8462f | 9000 | for (; size; size -= chunksz, location += chunksz) |
d9352518 DB |
9001 | { |
9002 | switch (chunksz) | |
9003 | { | |
d9352518 | 9004 | case 1: |
9b239e0e | 9005 | x = (x << shift) | bfd_get_8 (input_bfd, location); |
d9352518 DB |
9006 | break; |
9007 | case 2: | |
9b239e0e | 9008 | x = (x << shift) | bfd_get_16 (input_bfd, location); |
d9352518 DB |
9009 | break; |
9010 | case 4: | |
9b239e0e | 9011 | x = (x << shift) | bfd_get_32 (input_bfd, location); |
d9352518 | 9012 | break; |
d9352518 | 9013 | #ifdef BFD64 |
9b239e0e NC |
9014 | case 8: |
9015 | x = (x << shift) | bfd_get_64 (input_bfd, location); | |
d9352518 | 9016 | break; |
9b239e0e NC |
9017 | #endif |
9018 | default: | |
9019 | abort (); | |
d9352518 DB |
9020 | } |
9021 | } | |
9022 | return x; | |
9023 | } | |
9024 | ||
a0c8462f AM |
9025 | static void |
9026 | decode_complex_addend (unsigned long *start, /* in bits */ | |
9027 | unsigned long *oplen, /* in bits */ | |
9028 | unsigned long *len, /* in bits */ | |
9029 | unsigned long *wordsz, /* in bytes */ | |
9030 | unsigned long *chunksz, /* in bytes */ | |
9031 | unsigned long *lsb0_p, | |
9032 | unsigned long *signed_p, | |
9033 | unsigned long *trunc_p, | |
9034 | unsigned long encoded) | |
d9352518 | 9035 | { |
07d6d2b8 AM |
9036 | * start = encoded & 0x3F; |
9037 | * len = (encoded >> 6) & 0x3F; | |
d9352518 DB |
9038 | * oplen = (encoded >> 12) & 0x3F; |
9039 | * wordsz = (encoded >> 18) & 0xF; | |
9040 | * chunksz = (encoded >> 22) & 0xF; | |
9041 | * lsb0_p = (encoded >> 27) & 1; | |
9042 | * signed_p = (encoded >> 28) & 1; | |
9043 | * trunc_p = (encoded >> 29) & 1; | |
9044 | } | |
9045 | ||
cdfeee4f | 9046 | bfd_reloc_status_type |
0f02bbd9 | 9047 | bfd_elf_perform_complex_relocation (bfd *input_bfd, |
bb294208 | 9048 | asection *input_section, |
0f02bbd9 AM |
9049 | bfd_byte *contents, |
9050 | Elf_Internal_Rela *rel, | |
9051 | bfd_vma relocation) | |
d9352518 | 9052 | { |
0f02bbd9 AM |
9053 | bfd_vma shift, x, mask; |
9054 | unsigned long start, oplen, len, wordsz, chunksz, lsb0_p, signed_p, trunc_p; | |
cdfeee4f | 9055 | bfd_reloc_status_type r; |
bb294208 | 9056 | bfd_size_type octets; |
d9352518 DB |
9057 | |
9058 | /* Perform this reloc, since it is complex. | |
9059 | (this is not to say that it necessarily refers to a complex | |
9060 | symbol; merely that it is a self-describing CGEN based reloc. | |
9061 | i.e. the addend has the complete reloc information (bit start, end, | |
a0c8462f | 9062 | word size, etc) encoded within it.). */ |
d9352518 | 9063 | |
a0c8462f AM |
9064 | decode_complex_addend (&start, &oplen, &len, &wordsz, |
9065 | &chunksz, &lsb0_p, &signed_p, | |
9066 | &trunc_p, rel->r_addend); | |
d9352518 DB |
9067 | |
9068 | mask = (((1L << (len - 1)) - 1) << 1) | 1; | |
9069 | ||
9070 | if (lsb0_p) | |
9071 | shift = (start + 1) - len; | |
9072 | else | |
9073 | shift = (8 * wordsz) - (start + len); | |
9074 | ||
bb294208 AM |
9075 | octets = rel->r_offset * bfd_octets_per_byte (input_bfd, input_section); |
9076 | x = get_value (wordsz, chunksz, input_bfd, contents + octets); | |
d9352518 DB |
9077 | |
9078 | #ifdef DEBUG | |
9079 | printf ("Doing complex reloc: " | |
9080 | "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, " | |
9081 | "chunksz %ld, start %ld, len %ld, oplen %ld\n" | |
9082 | " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n", | |
9083 | lsb0_p, signed_p, trunc_p, wordsz, chunksz, start, len, | |
9ccb8af9 AM |
9084 | oplen, (unsigned long) x, (unsigned long) mask, |
9085 | (unsigned long) relocation); | |
d9352518 DB |
9086 | #endif |
9087 | ||
cdfeee4f | 9088 | r = bfd_reloc_ok; |
d9352518 | 9089 | if (! trunc_p) |
cdfeee4f AM |
9090 | /* Now do an overflow check. */ |
9091 | r = bfd_check_overflow ((signed_p | |
9092 | ? complain_overflow_signed | |
9093 | : complain_overflow_unsigned), | |
9094 | len, 0, (8 * wordsz), | |
9095 | relocation); | |
a0c8462f | 9096 | |
d9352518 DB |
9097 | /* Do the deed. */ |
9098 | x = (x & ~(mask << shift)) | ((relocation & mask) << shift); | |
9099 | ||
9100 | #ifdef DEBUG | |
9101 | printf (" relocation: %8.8lx\n" | |
9102 | " shifted mask: %8.8lx\n" | |
9103 | " shifted/masked reloc: %8.8lx\n" | |
9104 | " result: %8.8lx\n", | |
9ccb8af9 AM |
9105 | (unsigned long) relocation, (unsigned long) (mask << shift), |
9106 | (unsigned long) ((relocation & mask) << shift), (unsigned long) x); | |
d9352518 | 9107 | #endif |
bb294208 | 9108 | put_value (wordsz, chunksz, input_bfd, x, contents + octets); |
cdfeee4f | 9109 | return r; |
d9352518 DB |
9110 | } |
9111 | ||
0e287786 AM |
9112 | /* Functions to read r_offset from external (target order) reloc |
9113 | entry. Faster than bfd_getl32 et al, because we let the compiler | |
9114 | know the value is aligned. */ | |
53df40a4 | 9115 | |
0e287786 AM |
9116 | static bfd_vma |
9117 | ext32l_r_offset (const void *p) | |
53df40a4 AM |
9118 | { |
9119 | union aligned32 | |
9120 | { | |
9121 | uint32_t v; | |
9122 | unsigned char c[4]; | |
9123 | }; | |
9124 | const union aligned32 *a | |
0e287786 | 9125 | = (const union aligned32 *) &((const Elf32_External_Rel *) p)->r_offset; |
53df40a4 AM |
9126 | |
9127 | uint32_t aval = ( (uint32_t) a->c[0] | |
9128 | | (uint32_t) a->c[1] << 8 | |
9129 | | (uint32_t) a->c[2] << 16 | |
9130 | | (uint32_t) a->c[3] << 24); | |
0e287786 | 9131 | return aval; |
53df40a4 AM |
9132 | } |
9133 | ||
0e287786 AM |
9134 | static bfd_vma |
9135 | ext32b_r_offset (const void *p) | |
53df40a4 AM |
9136 | { |
9137 | union aligned32 | |
9138 | { | |
9139 | uint32_t v; | |
9140 | unsigned char c[4]; | |
9141 | }; | |
9142 | const union aligned32 *a | |
0e287786 | 9143 | = (const union aligned32 *) &((const Elf32_External_Rel *) p)->r_offset; |
53df40a4 AM |
9144 | |
9145 | uint32_t aval = ( (uint32_t) a->c[0] << 24 | |
9146 | | (uint32_t) a->c[1] << 16 | |
9147 | | (uint32_t) a->c[2] << 8 | |
9148 | | (uint32_t) a->c[3]); | |
0e287786 | 9149 | return aval; |
53df40a4 AM |
9150 | } |
9151 | ||
9152 | #ifdef BFD_HOST_64_BIT | |
0e287786 AM |
9153 | static bfd_vma |
9154 | ext64l_r_offset (const void *p) | |
53df40a4 AM |
9155 | { |
9156 | union aligned64 | |
9157 | { | |
9158 | uint64_t v; | |
9159 | unsigned char c[8]; | |
9160 | }; | |
9161 | const union aligned64 *a | |
0e287786 | 9162 | = (const union aligned64 *) &((const Elf64_External_Rel *) p)->r_offset; |
53df40a4 AM |
9163 | |
9164 | uint64_t aval = ( (uint64_t) a->c[0] | |
9165 | | (uint64_t) a->c[1] << 8 | |
9166 | | (uint64_t) a->c[2] << 16 | |
9167 | | (uint64_t) a->c[3] << 24 | |
9168 | | (uint64_t) a->c[4] << 32 | |
9169 | | (uint64_t) a->c[5] << 40 | |
9170 | | (uint64_t) a->c[6] << 48 | |
9171 | | (uint64_t) a->c[7] << 56); | |
0e287786 | 9172 | return aval; |
53df40a4 AM |
9173 | } |
9174 | ||
0e287786 AM |
9175 | static bfd_vma |
9176 | ext64b_r_offset (const void *p) | |
53df40a4 AM |
9177 | { |
9178 | union aligned64 | |
9179 | { | |
9180 | uint64_t v; | |
9181 | unsigned char c[8]; | |
9182 | }; | |
9183 | const union aligned64 *a | |
0e287786 | 9184 | = (const union aligned64 *) &((const Elf64_External_Rel *) p)->r_offset; |
53df40a4 AM |
9185 | |
9186 | uint64_t aval = ( (uint64_t) a->c[0] << 56 | |
9187 | | (uint64_t) a->c[1] << 48 | |
9188 | | (uint64_t) a->c[2] << 40 | |
9189 | | (uint64_t) a->c[3] << 32 | |
9190 | | (uint64_t) a->c[4] << 24 | |
9191 | | (uint64_t) a->c[5] << 16 | |
9192 | | (uint64_t) a->c[6] << 8 | |
9193 | | (uint64_t) a->c[7]); | |
0e287786 | 9194 | return aval; |
53df40a4 AM |
9195 | } |
9196 | #endif | |
9197 | ||
c152c796 AM |
9198 | /* When performing a relocatable link, the input relocations are |
9199 | preserved. But, if they reference global symbols, the indices | |
d4730f92 BS |
9200 | referenced must be updated. Update all the relocations found in |
9201 | RELDATA. */ | |
c152c796 | 9202 | |
0a1b45a2 | 9203 | static bool |
c152c796 | 9204 | elf_link_adjust_relocs (bfd *abfd, |
9eaff861 | 9205 | asection *sec, |
28dbcedc | 9206 | struct bfd_elf_section_reloc_data *reldata, |
0a1b45a2 | 9207 | bool sort, |
10bbbc1d | 9208 | struct bfd_link_info *info) |
c152c796 AM |
9209 | { |
9210 | unsigned int i; | |
9211 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
9212 | bfd_byte *erela; | |
9213 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); | |
9214 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
9215 | bfd_vma r_type_mask; | |
9216 | int r_sym_shift; | |
d4730f92 BS |
9217 | unsigned int count = reldata->count; |
9218 | struct elf_link_hash_entry **rel_hash = reldata->hashes; | |
c152c796 | 9219 | |
d4730f92 | 9220 | if (reldata->hdr->sh_entsize == bed->s->sizeof_rel) |
c152c796 AM |
9221 | { |
9222 | swap_in = bed->s->swap_reloc_in; | |
9223 | swap_out = bed->s->swap_reloc_out; | |
9224 | } | |
d4730f92 | 9225 | else if (reldata->hdr->sh_entsize == bed->s->sizeof_rela) |
c152c796 AM |
9226 | { |
9227 | swap_in = bed->s->swap_reloca_in; | |
9228 | swap_out = bed->s->swap_reloca_out; | |
9229 | } | |
9230 | else | |
9231 | abort (); | |
9232 | ||
9233 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
9234 | abort (); | |
9235 | ||
9236 | if (bed->s->arch_size == 32) | |
9237 | { | |
9238 | r_type_mask = 0xff; | |
9239 | r_sym_shift = 8; | |
9240 | } | |
9241 | else | |
9242 | { | |
9243 | r_type_mask = 0xffffffff; | |
9244 | r_sym_shift = 32; | |
9245 | } | |
9246 | ||
d4730f92 BS |
9247 | erela = reldata->hdr->contents; |
9248 | for (i = 0; i < count; i++, rel_hash++, erela += reldata->hdr->sh_entsize) | |
c152c796 AM |
9249 | { |
9250 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; | |
9251 | unsigned int j; | |
9252 | ||
9253 | if (*rel_hash == NULL) | |
9254 | continue; | |
9255 | ||
10bbbc1d NC |
9256 | if ((*rel_hash)->indx == -2 |
9257 | && info->gc_sections | |
9258 | && ! info->gc_keep_exported) | |
9259 | { | |
9260 | /* PR 21524: Let the user know if a symbol was removed by garbage collection. */ | |
9793eb77 | 9261 | _bfd_error_handler (_("%pB:%pA: error: relocation references symbol %s which was removed by garbage collection"), |
10bbbc1d NC |
9262 | abfd, sec, |
9263 | (*rel_hash)->root.root.string); | |
9793eb77 | 9264 | _bfd_error_handler (_("%pB:%pA: error: try relinking with --gc-keep-exported enabled"), |
d42c267e | 9265 | abfd, sec); |
10bbbc1d | 9266 | bfd_set_error (bfd_error_invalid_operation); |
0a1b45a2 | 9267 | return false; |
10bbbc1d | 9268 | } |
c152c796 AM |
9269 | BFD_ASSERT ((*rel_hash)->indx >= 0); |
9270 | ||
9271 | (*swap_in) (abfd, erela, irela); | |
9272 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
9273 | irela[j].r_info = ((bfd_vma) (*rel_hash)->indx << r_sym_shift | |
9274 | | (irela[j].r_info & r_type_mask)); | |
9275 | (*swap_out) (abfd, irela, erela); | |
9276 | } | |
53df40a4 | 9277 | |
9eaff861 AO |
9278 | if (bed->elf_backend_update_relocs) |
9279 | (*bed->elf_backend_update_relocs) (sec, reldata); | |
9280 | ||
0e287786 | 9281 | if (sort && count != 0) |
53df40a4 | 9282 | { |
0e287786 AM |
9283 | bfd_vma (*ext_r_off) (const void *); |
9284 | bfd_vma r_off; | |
9285 | size_t elt_size; | |
9286 | bfd_byte *base, *end, *p, *loc; | |
bca6d0e3 | 9287 | bfd_byte *buf = NULL; |
28dbcedc AM |
9288 | |
9289 | if (bed->s->arch_size == 32) | |
9290 | { | |
9291 | if (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE) | |
0e287786 | 9292 | ext_r_off = ext32l_r_offset; |
28dbcedc | 9293 | else if (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
0e287786 | 9294 | ext_r_off = ext32b_r_offset; |
28dbcedc AM |
9295 | else |
9296 | abort (); | |
9297 | } | |
53df40a4 | 9298 | else |
28dbcedc | 9299 | { |
53df40a4 | 9300 | #ifdef BFD_HOST_64_BIT |
28dbcedc | 9301 | if (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE) |
0e287786 | 9302 | ext_r_off = ext64l_r_offset; |
28dbcedc | 9303 | else if (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
0e287786 | 9304 | ext_r_off = ext64b_r_offset; |
28dbcedc | 9305 | else |
53df40a4 | 9306 | #endif |
28dbcedc AM |
9307 | abort (); |
9308 | } | |
0e287786 | 9309 | |
bca6d0e3 AM |
9310 | /* Must use a stable sort here. A modified insertion sort, |
9311 | since the relocs are mostly sorted already. */ | |
0e287786 AM |
9312 | elt_size = reldata->hdr->sh_entsize; |
9313 | base = reldata->hdr->contents; | |
9314 | end = base + count * elt_size; | |
bca6d0e3 | 9315 | if (elt_size > sizeof (Elf64_External_Rela)) |
0e287786 AM |
9316 | abort (); |
9317 | ||
9318 | /* Ensure the first element is lowest. This acts as a sentinel, | |
9319 | speeding the main loop below. */ | |
9320 | r_off = (*ext_r_off) (base); | |
9321 | for (p = loc = base; (p += elt_size) < end; ) | |
9322 | { | |
9323 | bfd_vma r_off2 = (*ext_r_off) (p); | |
9324 | if (r_off > r_off2) | |
9325 | { | |
9326 | r_off = r_off2; | |
9327 | loc = p; | |
9328 | } | |
9329 | } | |
9330 | if (loc != base) | |
9331 | { | |
9332 | /* Don't just swap *base and *loc as that changes the order | |
9333 | of the original base[0] and base[1] if they happen to | |
9334 | have the same r_offset. */ | |
bca6d0e3 AM |
9335 | bfd_byte onebuf[sizeof (Elf64_External_Rela)]; |
9336 | memcpy (onebuf, loc, elt_size); | |
0e287786 | 9337 | memmove (base + elt_size, base, loc - base); |
bca6d0e3 | 9338 | memcpy (base, onebuf, elt_size); |
0e287786 AM |
9339 | } |
9340 | ||
b29b8669 | 9341 | for (p = base + elt_size; (p += elt_size) < end; ) |
0e287786 AM |
9342 | { |
9343 | /* base to p is sorted, *p is next to insert. */ | |
9344 | r_off = (*ext_r_off) (p); | |
9345 | /* Search the sorted region for location to insert. */ | |
9346 | loc = p - elt_size; | |
9347 | while (r_off < (*ext_r_off) (loc)) | |
9348 | loc -= elt_size; | |
9349 | loc += elt_size; | |
9350 | if (loc != p) | |
9351 | { | |
bca6d0e3 AM |
9352 | /* Chances are there is a run of relocs to insert here, |
9353 | from one of more input files. Files are not always | |
9354 | linked in order due to the way elf_link_input_bfd is | |
9355 | called. See pr17666. */ | |
9356 | size_t sortlen = p - loc; | |
9357 | bfd_vma r_off2 = (*ext_r_off) (loc); | |
9358 | size_t runlen = elt_size; | |
9359 | size_t buf_size = 96 * 1024; | |
9360 | while (p + runlen < end | |
9361 | && (sortlen <= buf_size | |
9362 | || runlen + elt_size <= buf_size) | |
9363 | && r_off2 > (*ext_r_off) (p + runlen)) | |
9364 | runlen += elt_size; | |
9365 | if (buf == NULL) | |
9366 | { | |
9367 | buf = bfd_malloc (buf_size); | |
9368 | if (buf == NULL) | |
0a1b45a2 | 9369 | return false; |
bca6d0e3 AM |
9370 | } |
9371 | if (runlen < sortlen) | |
9372 | { | |
9373 | memcpy (buf, p, runlen); | |
9374 | memmove (loc + runlen, loc, sortlen); | |
9375 | memcpy (loc, buf, runlen); | |
9376 | } | |
9377 | else | |
9378 | { | |
9379 | memcpy (buf, loc, sortlen); | |
9380 | memmove (loc, p, runlen); | |
9381 | memcpy (loc + runlen, buf, sortlen); | |
9382 | } | |
b29b8669 | 9383 | p += runlen - elt_size; |
0e287786 AM |
9384 | } |
9385 | } | |
9386 | /* Hashes are no longer valid. */ | |
28dbcedc AM |
9387 | free (reldata->hashes); |
9388 | reldata->hashes = NULL; | |
bca6d0e3 | 9389 | free (buf); |
53df40a4 | 9390 | } |
0a1b45a2 | 9391 | return true; |
c152c796 AM |
9392 | } |
9393 | ||
9394 | struct elf_link_sort_rela | |
9395 | { | |
9396 | union { | |
9397 | bfd_vma offset; | |
9398 | bfd_vma sym_mask; | |
9399 | } u; | |
9400 | enum elf_reloc_type_class type; | |
9401 | /* We use this as an array of size int_rels_per_ext_rel. */ | |
9402 | Elf_Internal_Rela rela[1]; | |
9403 | }; | |
9404 | ||
dcea6a95 AM |
9405 | /* qsort stability here and for cmp2 is only an issue if multiple |
9406 | dynamic relocations are emitted at the same address. But targets | |
9407 | that apply a series of dynamic relocations each operating on the | |
9408 | result of the prior relocation can't use -z combreloc as | |
9409 | implemented anyway. Such schemes tend to be broken by sorting on | |
9410 | symbol index. That leaves dynamic NONE relocs as the only other | |
9411 | case where ld might emit multiple relocs at the same address, and | |
9412 | those are only emitted due to target bugs. */ | |
9413 | ||
c152c796 AM |
9414 | static int |
9415 | elf_link_sort_cmp1 (const void *A, const void *B) | |
9416 | { | |
a50b1753 NC |
9417 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
9418 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 AM |
9419 | int relativea, relativeb; |
9420 | ||
9421 | relativea = a->type == reloc_class_relative; | |
9422 | relativeb = b->type == reloc_class_relative; | |
9423 | ||
9424 | if (relativea < relativeb) | |
9425 | return 1; | |
9426 | if (relativea > relativeb) | |
9427 | return -1; | |
9428 | if ((a->rela->r_info & a->u.sym_mask) < (b->rela->r_info & b->u.sym_mask)) | |
9429 | return -1; | |
9430 | if ((a->rela->r_info & a->u.sym_mask) > (b->rela->r_info & b->u.sym_mask)) | |
9431 | return 1; | |
9432 | if (a->rela->r_offset < b->rela->r_offset) | |
9433 | return -1; | |
9434 | if (a->rela->r_offset > b->rela->r_offset) | |
9435 | return 1; | |
9436 | return 0; | |
9437 | } | |
9438 | ||
9439 | static int | |
9440 | elf_link_sort_cmp2 (const void *A, const void *B) | |
9441 | { | |
a50b1753 NC |
9442 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
9443 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 | 9444 | |
7e612e98 | 9445 | if (a->type < b->type) |
c152c796 | 9446 | return -1; |
7e612e98 | 9447 | if (a->type > b->type) |
c152c796 | 9448 | return 1; |
7e612e98 | 9449 | if (a->u.offset < b->u.offset) |
c152c796 | 9450 | return -1; |
7e612e98 | 9451 | if (a->u.offset > b->u.offset) |
c152c796 AM |
9452 | return 1; |
9453 | if (a->rela->r_offset < b->rela->r_offset) | |
9454 | return -1; | |
9455 | if (a->rela->r_offset > b->rela->r_offset) | |
9456 | return 1; | |
9457 | return 0; | |
9458 | } | |
9459 | ||
9460 | static size_t | |
9461 | elf_link_sort_relocs (bfd *abfd, struct bfd_link_info *info, asection **psec) | |
9462 | { | |
3410fea8 | 9463 | asection *dynamic_relocs; |
fc66a176 L |
9464 | asection *rela_dyn; |
9465 | asection *rel_dyn; | |
c152c796 AM |
9466 | bfd_size_type count, size; |
9467 | size_t i, ret, sort_elt, ext_size; | |
9468 | bfd_byte *sort, *s_non_relative, *p; | |
9469 | struct elf_link_sort_rela *sq; | |
9470 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
9471 | int i2e = bed->s->int_rels_per_ext_rel; | |
61826503 | 9472 | unsigned int opb = bfd_octets_per_byte (abfd, NULL); |
c152c796 AM |
9473 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
9474 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
9475 | struct bfd_link_order *lo; | |
9476 | bfd_vma r_sym_mask; | |
0a1b45a2 | 9477 | bool use_rela; |
c152c796 | 9478 | |
3410fea8 NC |
9479 | /* Find a dynamic reloc section. */ |
9480 | rela_dyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
9481 | rel_dyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
9482 | if (rela_dyn != NULL && rela_dyn->size > 0 | |
9483 | && rel_dyn != NULL && rel_dyn->size > 0) | |
c152c796 | 9484 | { |
0a1b45a2 | 9485 | bool use_rela_initialised = false; |
3410fea8 NC |
9486 | |
9487 | /* This is just here to stop gcc from complaining. | |
c8e44c6d | 9488 | Its initialization checking code is not perfect. */ |
0a1b45a2 | 9489 | use_rela = true; |
3410fea8 NC |
9490 | |
9491 | /* Both sections are present. Examine the sizes | |
9492 | of the indirect sections to help us choose. */ | |
9493 | for (lo = rela_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
9494 | if (lo->type == bfd_indirect_link_order) | |
9495 | { | |
9496 | asection *o = lo->u.indirect.section; | |
9497 | ||
9498 | if ((o->size % bed->s->sizeof_rela) == 0) | |
9499 | { | |
9500 | if ((o->size % bed->s->sizeof_rel) == 0) | |
9501 | /* Section size is divisible by both rel and rela sizes. | |
9502 | It is of no help to us. */ | |
9503 | ; | |
9504 | else | |
9505 | { | |
9506 | /* Section size is only divisible by rela. */ | |
535b785f | 9507 | if (use_rela_initialised && !use_rela) |
3410fea8 | 9508 | { |
9793eb77 | 9509 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d AM |
9510 | "they are in more than one size"), |
9511 | abfd); | |
3410fea8 NC |
9512 | bfd_set_error (bfd_error_invalid_operation); |
9513 | return 0; | |
9514 | } | |
9515 | else | |
9516 | { | |
0a1b45a2 AM |
9517 | use_rela = true; |
9518 | use_rela_initialised = true; | |
3410fea8 NC |
9519 | } |
9520 | } | |
9521 | } | |
9522 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
9523 | { | |
9524 | /* Section size is only divisible by rel. */ | |
535b785f | 9525 | if (use_rela_initialised && use_rela) |
3410fea8 | 9526 | { |
9793eb77 | 9527 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d AM |
9528 | "they are in more than one size"), |
9529 | abfd); | |
3410fea8 NC |
9530 | bfd_set_error (bfd_error_invalid_operation); |
9531 | return 0; | |
9532 | } | |
9533 | else | |
9534 | { | |
0a1b45a2 AM |
9535 | use_rela = false; |
9536 | use_rela_initialised = true; | |
3410fea8 NC |
9537 | } |
9538 | } | |
9539 | else | |
9540 | { | |
c8e44c6d AM |
9541 | /* The section size is not divisible by either - |
9542 | something is wrong. */ | |
9793eb77 | 9543 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d | 9544 | "they are of an unknown size"), abfd); |
3410fea8 NC |
9545 | bfd_set_error (bfd_error_invalid_operation); |
9546 | return 0; | |
9547 | } | |
9548 | } | |
9549 | ||
9550 | for (lo = rel_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
9551 | if (lo->type == bfd_indirect_link_order) | |
9552 | { | |
9553 | asection *o = lo->u.indirect.section; | |
9554 | ||
9555 | if ((o->size % bed->s->sizeof_rela) == 0) | |
9556 | { | |
9557 | if ((o->size % bed->s->sizeof_rel) == 0) | |
9558 | /* Section size is divisible by both rel and rela sizes. | |
9559 | It is of no help to us. */ | |
9560 | ; | |
9561 | else | |
9562 | { | |
9563 | /* Section size is only divisible by rela. */ | |
535b785f | 9564 | if (use_rela_initialised && !use_rela) |
3410fea8 | 9565 | { |
9793eb77 | 9566 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d AM |
9567 | "they are in more than one size"), |
9568 | abfd); | |
3410fea8 NC |
9569 | bfd_set_error (bfd_error_invalid_operation); |
9570 | return 0; | |
9571 | } | |
9572 | else | |
9573 | { | |
0a1b45a2 AM |
9574 | use_rela = true; |
9575 | use_rela_initialised = true; | |
3410fea8 NC |
9576 | } |
9577 | } | |
9578 | } | |
9579 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
9580 | { | |
9581 | /* Section size is only divisible by rel. */ | |
535b785f | 9582 | if (use_rela_initialised && use_rela) |
3410fea8 | 9583 | { |
9793eb77 | 9584 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d AM |
9585 | "they are in more than one size"), |
9586 | abfd); | |
3410fea8 NC |
9587 | bfd_set_error (bfd_error_invalid_operation); |
9588 | return 0; | |
9589 | } | |
9590 | else | |
9591 | { | |
0a1b45a2 AM |
9592 | use_rela = false; |
9593 | use_rela_initialised = true; | |
3410fea8 NC |
9594 | } |
9595 | } | |
9596 | else | |
9597 | { | |
c8e44c6d AM |
9598 | /* The section size is not divisible by either - |
9599 | something is wrong. */ | |
9793eb77 | 9600 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d | 9601 | "they are of an unknown size"), abfd); |
3410fea8 NC |
9602 | bfd_set_error (bfd_error_invalid_operation); |
9603 | return 0; | |
9604 | } | |
9605 | } | |
9606 | ||
9607 | if (! use_rela_initialised) | |
9608 | /* Make a guess. */ | |
0a1b45a2 | 9609 | use_rela = true; |
c152c796 | 9610 | } |
fc66a176 | 9611 | else if (rela_dyn != NULL && rela_dyn->size > 0) |
0a1b45a2 | 9612 | use_rela = true; |
fc66a176 | 9613 | else if (rel_dyn != NULL && rel_dyn->size > 0) |
0a1b45a2 | 9614 | use_rela = false; |
c152c796 | 9615 | else |
fc66a176 | 9616 | return 0; |
3410fea8 NC |
9617 | |
9618 | if (use_rela) | |
c152c796 | 9619 | { |
3410fea8 | 9620 | dynamic_relocs = rela_dyn; |
c152c796 AM |
9621 | ext_size = bed->s->sizeof_rela; |
9622 | swap_in = bed->s->swap_reloca_in; | |
9623 | swap_out = bed->s->swap_reloca_out; | |
9624 | } | |
3410fea8 NC |
9625 | else |
9626 | { | |
9627 | dynamic_relocs = rel_dyn; | |
9628 | ext_size = bed->s->sizeof_rel; | |
9629 | swap_in = bed->s->swap_reloc_in; | |
9630 | swap_out = bed->s->swap_reloc_out; | |
9631 | } | |
c152c796 AM |
9632 | |
9633 | size = 0; | |
3410fea8 | 9634 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 | 9635 | if (lo->type == bfd_indirect_link_order) |
3410fea8 | 9636 | size += lo->u.indirect.section->size; |
c152c796 | 9637 | |
3410fea8 | 9638 | if (size != dynamic_relocs->size) |
c152c796 AM |
9639 | return 0; |
9640 | ||
9641 | sort_elt = (sizeof (struct elf_link_sort_rela) | |
9642 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
3410fea8 NC |
9643 | |
9644 | count = dynamic_relocs->size / ext_size; | |
5e486aa1 NC |
9645 | if (count == 0) |
9646 | return 0; | |
a50b1753 | 9647 | sort = (bfd_byte *) bfd_zmalloc (sort_elt * count); |
3410fea8 | 9648 | |
c152c796 AM |
9649 | if (sort == NULL) |
9650 | { | |
9651 | (*info->callbacks->warning) | |
9793eb77 | 9652 | (info, _("not enough memory to sort relocations"), 0, abfd, 0, 0); |
c152c796 AM |
9653 | return 0; |
9654 | } | |
9655 | ||
9656 | if (bed->s->arch_size == 32) | |
9657 | r_sym_mask = ~(bfd_vma) 0xff; | |
9658 | else | |
9659 | r_sym_mask = ~(bfd_vma) 0xffffffff; | |
9660 | ||
3410fea8 | 9661 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
9662 | if (lo->type == bfd_indirect_link_order) |
9663 | { | |
9664 | bfd_byte *erel, *erelend; | |
9665 | asection *o = lo->u.indirect.section; | |
9666 | ||
1da212d6 AM |
9667 | if (o->contents == NULL && o->size != 0) |
9668 | { | |
9669 | /* This is a reloc section that is being handled as a normal | |
9670 | section. See bfd_section_from_shdr. We can't combine | |
9671 | relocs in this case. */ | |
9672 | free (sort); | |
9673 | return 0; | |
9674 | } | |
c152c796 | 9675 | erel = o->contents; |
eea6121a | 9676 | erelend = o->contents + o->size; |
c8e44c6d | 9677 | p = sort + o->output_offset * opb / ext_size * sort_elt; |
3410fea8 | 9678 | |
c152c796 AM |
9679 | while (erel < erelend) |
9680 | { | |
9681 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
3410fea8 | 9682 | |
c152c796 | 9683 | (*swap_in) (abfd, erel, s->rela); |
7e612e98 | 9684 | s->type = (*bed->elf_backend_reloc_type_class) (info, o, s->rela); |
c152c796 AM |
9685 | s->u.sym_mask = r_sym_mask; |
9686 | p += sort_elt; | |
9687 | erel += ext_size; | |
9688 | } | |
9689 | } | |
9690 | ||
9691 | qsort (sort, count, sort_elt, elf_link_sort_cmp1); | |
9692 | ||
9693 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
9694 | { | |
9695 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
9696 | if (s->type != reloc_class_relative) | |
9697 | break; | |
9698 | } | |
9699 | ret = i; | |
9700 | s_non_relative = p; | |
9701 | ||
9702 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
9703 | for (; i < count; i++, p += sort_elt) | |
9704 | { | |
9705 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
9706 | if (((sp->rela->r_info ^ sq->rela->r_info) & r_sym_mask) != 0) | |
9707 | sq = sp; | |
9708 | sp->u.offset = sq->rela->r_offset; | |
9709 | } | |
9710 | ||
9711 | qsort (s_non_relative, count - ret, sort_elt, elf_link_sort_cmp2); | |
9712 | ||
c8e44c6d AM |
9713 | struct elf_link_hash_table *htab = elf_hash_table (info); |
9714 | if (htab->srelplt && htab->srelplt->output_section == dynamic_relocs) | |
9715 | { | |
9716 | /* We have plt relocs in .rela.dyn. */ | |
9717 | sq = (struct elf_link_sort_rela *) sort; | |
9718 | for (i = 0; i < count; i++) | |
9719 | if (sq[count - i - 1].type != reloc_class_plt) | |
9720 | break; | |
9721 | if (i != 0 && htab->srelplt->size == i * ext_size) | |
9722 | { | |
9723 | struct bfd_link_order **plo; | |
9724 | /* Put srelplt link_order last. This is so the output_offset | |
9725 | set in the next loop is correct for DT_JMPREL. */ | |
9726 | for (plo = &dynamic_relocs->map_head.link_order; *plo != NULL; ) | |
9727 | if ((*plo)->type == bfd_indirect_link_order | |
9728 | && (*plo)->u.indirect.section == htab->srelplt) | |
9729 | { | |
9730 | lo = *plo; | |
9731 | *plo = lo->next; | |
9732 | } | |
9733 | else | |
9734 | plo = &(*plo)->next; | |
9735 | *plo = lo; | |
9736 | lo->next = NULL; | |
9737 | dynamic_relocs->map_tail.link_order = lo; | |
9738 | } | |
9739 | } | |
9740 | ||
9741 | p = sort; | |
3410fea8 | 9742 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
9743 | if (lo->type == bfd_indirect_link_order) |
9744 | { | |
9745 | bfd_byte *erel, *erelend; | |
9746 | asection *o = lo->u.indirect.section; | |
9747 | ||
9748 | erel = o->contents; | |
eea6121a | 9749 | erelend = o->contents + o->size; |
c8e44c6d | 9750 | o->output_offset = (p - sort) / sort_elt * ext_size / opb; |
c152c796 AM |
9751 | while (erel < erelend) |
9752 | { | |
9753 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
9754 | (*swap_out) (abfd, s->rela, erel); | |
9755 | p += sort_elt; | |
9756 | erel += ext_size; | |
9757 | } | |
9758 | } | |
9759 | ||
9760 | free (sort); | |
3410fea8 | 9761 | *psec = dynamic_relocs; |
c152c796 AM |
9762 | return ret; |
9763 | } | |
9764 | ||
ef10c3ac | 9765 | /* Add a symbol to the output symbol string table. */ |
c152c796 | 9766 | |
6e0b88f1 | 9767 | static int |
37bb890f | 9768 | elf_link_output_symstrtab (void *finf, |
ef10c3ac L |
9769 | const char *name, |
9770 | Elf_Internal_Sym *elfsym, | |
9771 | asection *input_sec, | |
9772 | struct elf_link_hash_entry *h) | |
c152c796 | 9773 | { |
37bb890f | 9774 | struct elf_final_link_info *flinfo = finf; |
6e0b88f1 | 9775 | int (*output_symbol_hook) |
c152c796 AM |
9776 | (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *, |
9777 | struct elf_link_hash_entry *); | |
ef10c3ac | 9778 | struct elf_link_hash_table *hash_table; |
c152c796 | 9779 | const struct elf_backend_data *bed; |
ef10c3ac | 9780 | bfd_size_type strtabsize; |
c152c796 | 9781 | |
8539e4e8 AM |
9782 | BFD_ASSERT (elf_onesymtab (flinfo->output_bfd)); |
9783 | ||
8b127cbc | 9784 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 AM |
9785 | output_symbol_hook = bed->elf_backend_link_output_symbol_hook; |
9786 | if (output_symbol_hook != NULL) | |
9787 | { | |
8b127cbc | 9788 | int ret = (*output_symbol_hook) (flinfo->info, name, elfsym, input_sec, h); |
6e0b88f1 AM |
9789 | if (ret != 1) |
9790 | return ret; | |
c152c796 AM |
9791 | } |
9792 | ||
06f44071 AM |
9793 | if (ELF_ST_TYPE (elfsym->st_info) == STT_GNU_IFUNC) |
9794 | elf_tdata (flinfo->output_bfd)->has_gnu_osabi |= elf_gnu_osabi_ifunc; | |
9795 | if (ELF_ST_BIND (elfsym->st_info) == STB_GNU_UNIQUE) | |
9796 | elf_tdata (flinfo->output_bfd)->has_gnu_osabi |= elf_gnu_osabi_unique; | |
9797 | ||
ef10c3ac L |
9798 | if (name == NULL |
9799 | || *name == '\0' | |
9800 | || (input_sec->flags & SEC_EXCLUDE)) | |
9801 | elfsym->st_name = (unsigned long) -1; | |
c152c796 AM |
9802 | else |
9803 | { | |
ef10c3ac L |
9804 | /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize |
9805 | to get the final offset for st_name. */ | |
3f2e9699 | 9806 | char *versioned_name = (char *) name; |
496afd17 L |
9807 | if (h != NULL) |
9808 | { | |
9809 | if (h->versioned == versioned && h->def_dynamic) | |
9810 | { | |
9811 | /* Keep only one '@' for versioned symbols defined in | |
9812 | shared objects. */ | |
9813 | char *version = strrchr (name, ELF_VER_CHR); | |
9814 | char *base_end = strchr (name, ELF_VER_CHR); | |
9815 | if (version != base_end) | |
9816 | { | |
9817 | size_t base_len; | |
9818 | size_t len = strlen (name); | |
9819 | versioned_name = bfd_alloc (flinfo->output_bfd, len); | |
9820 | if (versioned_name == NULL) | |
9821 | return 0; | |
9822 | base_len = base_end - name; | |
9823 | memcpy (versioned_name, name, base_len); | |
9824 | memcpy (versioned_name + base_len, version, | |
9825 | len - base_len); | |
9826 | } | |
9827 | } | |
9828 | } | |
9829 | else if (flinfo->info->unique_symbol | |
9830 | && ELF_ST_BIND (elfsym->st_info) == STB_LOCAL) | |
3f2e9699 | 9831 | { |
496afd17 | 9832 | struct local_hash_entry *lh; |
4467df35 L |
9833 | size_t count_len; |
9834 | size_t base_len; | |
9835 | char buf[30]; | |
496afd17 | 9836 | switch (ELF_ST_TYPE (elfsym->st_info)) |
3f2e9699 | 9837 | { |
496afd17 L |
9838 | case STT_FILE: |
9839 | case STT_SECTION: | |
9840 | break; | |
9841 | default: | |
9842 | lh = (struct local_hash_entry *) bfd_hash_lookup | |
0a1b45a2 | 9843 | (&flinfo->local_hash_table, name, true, false); |
496afd17 | 9844 | if (lh == NULL) |
3f2e9699 | 9845 | return 0; |
4467df35 L |
9846 | /* Always append ".COUNT" to local symbols to avoid |
9847 | potential conflicts with local symbol "XXX.COUNT". */ | |
9848 | sprintf (buf, "%lx", lh->count); | |
9849 | base_len = lh->size; | |
9850 | if (!base_len) | |
496afd17 | 9851 | { |
4467df35 L |
9852 | base_len = strlen (name); |
9853 | lh->size = base_len; | |
496afd17 | 9854 | } |
4467df35 L |
9855 | count_len = strlen (buf); |
9856 | versioned_name = bfd_alloc (flinfo->output_bfd, | |
9857 | base_len + count_len + 2); | |
9858 | if (versioned_name == NULL) | |
9859 | return 0; | |
9860 | memcpy (versioned_name, name, base_len); | |
9861 | versioned_name[base_len] = '.'; | |
9862 | memcpy (versioned_name + base_len + 1, buf, | |
9863 | count_len + 1); | |
496afd17 L |
9864 | lh->count++; |
9865 | break; | |
3f2e9699 L |
9866 | } |
9867 | } | |
ef10c3ac L |
9868 | elfsym->st_name |
9869 | = (unsigned long) _bfd_elf_strtab_add (flinfo->symstrtab, | |
0a1b45a2 | 9870 | versioned_name, false); |
c152c796 | 9871 | if (elfsym->st_name == (unsigned long) -1) |
6e0b88f1 | 9872 | return 0; |
c152c796 AM |
9873 | } |
9874 | ||
ef10c3ac L |
9875 | hash_table = elf_hash_table (flinfo->info); |
9876 | strtabsize = hash_table->strtabsize; | |
9877 | if (strtabsize <= hash_table->strtabcount) | |
c152c796 | 9878 | { |
ef10c3ac L |
9879 | strtabsize += strtabsize; |
9880 | hash_table->strtabsize = strtabsize; | |
9881 | strtabsize *= sizeof (*hash_table->strtab); | |
9882 | hash_table->strtab | |
9883 | = (struct elf_sym_strtab *) bfd_realloc (hash_table->strtab, | |
9884 | strtabsize); | |
9885 | if (hash_table->strtab == NULL) | |
6e0b88f1 | 9886 | return 0; |
c152c796 | 9887 | } |
ef10c3ac L |
9888 | hash_table->strtab[hash_table->strtabcount].sym = *elfsym; |
9889 | hash_table->strtab[hash_table->strtabcount].dest_index | |
9890 | = hash_table->strtabcount; | |
9891 | hash_table->strtab[hash_table->strtabcount].destshndx_index | |
9892 | = flinfo->symshndxbuf ? bfd_get_symcount (flinfo->output_bfd) : 0; | |
9893 | ||
ed48ec2e | 9894 | flinfo->output_bfd->symcount += 1; |
ef10c3ac L |
9895 | hash_table->strtabcount += 1; |
9896 | ||
9897 | return 1; | |
9898 | } | |
9899 | ||
9900 | /* Swap symbols out to the symbol table and flush the output symbols to | |
9901 | the file. */ | |
9902 | ||
0a1b45a2 | 9903 | static bool |
ef10c3ac L |
9904 | elf_link_swap_symbols_out (struct elf_final_link_info *flinfo) |
9905 | { | |
9906 | struct elf_link_hash_table *hash_table = elf_hash_table (flinfo->info); | |
986f0783 | 9907 | size_t amt; |
ef53be89 | 9908 | size_t i; |
ef10c3ac L |
9909 | const struct elf_backend_data *bed; |
9910 | bfd_byte *symbuf; | |
9911 | Elf_Internal_Shdr *hdr; | |
9912 | file_ptr pos; | |
0a1b45a2 | 9913 | bool ret; |
ef10c3ac L |
9914 | |
9915 | if (!hash_table->strtabcount) | |
0a1b45a2 | 9916 | return true; |
ef10c3ac L |
9917 | |
9918 | BFD_ASSERT (elf_onesymtab (flinfo->output_bfd)); | |
9919 | ||
9920 | bed = get_elf_backend_data (flinfo->output_bfd); | |
c152c796 | 9921 | |
ef10c3ac L |
9922 | amt = bed->s->sizeof_sym * hash_table->strtabcount; |
9923 | symbuf = (bfd_byte *) bfd_malloc (amt); | |
9924 | if (symbuf == NULL) | |
0a1b45a2 | 9925 | return false; |
1b786873 | 9926 | |
ef10c3ac | 9927 | if (flinfo->symshndxbuf) |
c152c796 | 9928 | { |
ef53be89 AM |
9929 | amt = sizeof (Elf_External_Sym_Shndx); |
9930 | amt *= bfd_get_symcount (flinfo->output_bfd); | |
ef10c3ac L |
9931 | flinfo->symshndxbuf = (Elf_External_Sym_Shndx *) bfd_zmalloc (amt); |
9932 | if (flinfo->symshndxbuf == NULL) | |
c152c796 | 9933 | { |
ef10c3ac | 9934 | free (symbuf); |
0a1b45a2 | 9935 | return false; |
c152c796 | 9936 | } |
c152c796 AM |
9937 | } |
9938 | ||
3d16b64e | 9939 | /* Now swap out the symbols. */ |
ef10c3ac L |
9940 | for (i = 0; i < hash_table->strtabcount; i++) |
9941 | { | |
9942 | struct elf_sym_strtab *elfsym = &hash_table->strtab[i]; | |
9943 | if (elfsym->sym.st_name == (unsigned long) -1) | |
9944 | elfsym->sym.st_name = 0; | |
9945 | else | |
9946 | elfsym->sym.st_name | |
9947 | = (unsigned long) _bfd_elf_strtab_offset (flinfo->symstrtab, | |
9948 | elfsym->sym.st_name); | |
3d16b64e NA |
9949 | |
9950 | /* Inform the linker of the addition of this symbol. */ | |
9951 | ||
9952 | if (flinfo->info->callbacks->ctf_new_symbol) | |
9953 | flinfo->info->callbacks->ctf_new_symbol (elfsym->dest_index, | |
9954 | &elfsym->sym); | |
9955 | ||
ef10c3ac L |
9956 | bed->s->swap_symbol_out (flinfo->output_bfd, &elfsym->sym, |
9957 | ((bfd_byte *) symbuf | |
9958 | + (elfsym->dest_index | |
9959 | * bed->s->sizeof_sym)), | |
9960 | (flinfo->symshndxbuf | |
9961 | + elfsym->destshndx_index)); | |
9962 | } | |
9963 | ||
9964 | hdr = &elf_tdata (flinfo->output_bfd)->symtab_hdr; | |
9965 | pos = hdr->sh_offset + hdr->sh_size; | |
9966 | amt = hash_table->strtabcount * bed->s->sizeof_sym; | |
9967 | if (bfd_seek (flinfo->output_bfd, pos, SEEK_SET) == 0 | |
9968 | && bfd_bwrite (symbuf, amt, flinfo->output_bfd) == amt) | |
9969 | { | |
9970 | hdr->sh_size += amt; | |
0a1b45a2 | 9971 | ret = true; |
ef10c3ac L |
9972 | } |
9973 | else | |
0a1b45a2 | 9974 | ret = false; |
c152c796 | 9975 | |
ef10c3ac L |
9976 | free (symbuf); |
9977 | ||
9978 | free (hash_table->strtab); | |
9979 | hash_table->strtab = NULL; | |
9980 | ||
9981 | return ret; | |
c152c796 AM |
9982 | } |
9983 | ||
c0d5a53d L |
9984 | /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */ |
9985 | ||
0a1b45a2 | 9986 | static bool |
c0d5a53d L |
9987 | check_dynsym (bfd *abfd, Elf_Internal_Sym *sym) |
9988 | { | |
4fbb74a6 AM |
9989 | if (sym->st_shndx >= (SHN_LORESERVE & 0xffff) |
9990 | && sym->st_shndx < SHN_LORESERVE) | |
c0d5a53d L |
9991 | { |
9992 | /* The gABI doesn't support dynamic symbols in output sections | |
a0c8462f | 9993 | beyond 64k. */ |
4eca0228 | 9994 | _bfd_error_handler |
695344c0 | 9995 | /* xgettext:c-format */ |
9793eb77 | 9996 | (_("%pB: too many sections: %d (>= %d)"), |
4fbb74a6 | 9997 | abfd, bfd_count_sections (abfd), SHN_LORESERVE & 0xffff); |
c0d5a53d | 9998 | bfd_set_error (bfd_error_nonrepresentable_section); |
0a1b45a2 | 9999 | return false; |
c0d5a53d | 10000 | } |
0a1b45a2 | 10001 | return true; |
c0d5a53d L |
10002 | } |
10003 | ||
c152c796 AM |
10004 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
10005 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
10006 | versioned symbol that would normally require an explicit version. | |
10007 | We also handle the case that a DSO references a hidden symbol | |
10008 | which may be satisfied by a versioned symbol in another DSO. */ | |
10009 | ||
0a1b45a2 | 10010 | static bool |
c152c796 AM |
10011 | elf_link_check_versioned_symbol (struct bfd_link_info *info, |
10012 | const struct elf_backend_data *bed, | |
10013 | struct elf_link_hash_entry *h) | |
10014 | { | |
10015 | bfd *abfd; | |
10016 | struct elf_link_loaded_list *loaded; | |
10017 | ||
10018 | if (!is_elf_hash_table (info->hash)) | |
0a1b45a2 | 10019 | return false; |
c152c796 | 10020 | |
90c984fc L |
10021 | /* Check indirect symbol. */ |
10022 | while (h->root.type == bfd_link_hash_indirect) | |
10023 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10024 | ||
c152c796 AM |
10025 | switch (h->root.type) |
10026 | { | |
10027 | default: | |
10028 | abfd = NULL; | |
10029 | break; | |
10030 | ||
10031 | case bfd_link_hash_undefined: | |
10032 | case bfd_link_hash_undefweak: | |
10033 | abfd = h->root.u.undef.abfd; | |
f4ab0e2d L |
10034 | if (abfd == NULL |
10035 | || (abfd->flags & DYNAMIC) == 0 | |
e56f61be | 10036 | || (elf_dyn_lib_class (abfd) & DYN_DT_NEEDED) == 0) |
0a1b45a2 | 10037 | return false; |
c152c796 AM |
10038 | break; |
10039 | ||
10040 | case bfd_link_hash_defined: | |
10041 | case bfd_link_hash_defweak: | |
10042 | abfd = h->root.u.def.section->owner; | |
10043 | break; | |
10044 | ||
10045 | case bfd_link_hash_common: | |
10046 | abfd = h->root.u.c.p->section->owner; | |
10047 | break; | |
10048 | } | |
10049 | BFD_ASSERT (abfd != NULL); | |
10050 | ||
e310298c | 10051 | for (loaded = elf_hash_table (info)->dyn_loaded; |
c152c796 AM |
10052 | loaded != NULL; |
10053 | loaded = loaded->next) | |
10054 | { | |
10055 | bfd *input; | |
10056 | Elf_Internal_Shdr *hdr; | |
ef53be89 AM |
10057 | size_t symcount; |
10058 | size_t extsymcount; | |
10059 | size_t extsymoff; | |
c152c796 AM |
10060 | Elf_Internal_Shdr *versymhdr; |
10061 | Elf_Internal_Sym *isym; | |
10062 | Elf_Internal_Sym *isymend; | |
10063 | Elf_Internal_Sym *isymbuf; | |
10064 | Elf_External_Versym *ever; | |
10065 | Elf_External_Versym *extversym; | |
10066 | ||
10067 | input = loaded->abfd; | |
10068 | ||
10069 | /* We check each DSO for a possible hidden versioned definition. */ | |
10070 | if (input == abfd | |
c152c796 AM |
10071 | || elf_dynversym (input) == 0) |
10072 | continue; | |
10073 | ||
10074 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
10075 | ||
10076 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
10077 | if (elf_bad_symtab (input)) | |
10078 | { | |
10079 | extsymcount = symcount; | |
10080 | extsymoff = 0; | |
10081 | } | |
10082 | else | |
10083 | { | |
10084 | extsymcount = symcount - hdr->sh_info; | |
10085 | extsymoff = hdr->sh_info; | |
10086 | } | |
10087 | ||
10088 | if (extsymcount == 0) | |
10089 | continue; | |
10090 | ||
10091 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, | |
10092 | NULL, NULL, NULL); | |
10093 | if (isymbuf == NULL) | |
0a1b45a2 | 10094 | return false; |
c152c796 AM |
10095 | |
10096 | /* Read in any version definitions. */ | |
10097 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
c152c796 | 10098 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 |
2bb3687b AM |
10099 | || (extversym = (Elf_External_Versym *) |
10100 | _bfd_malloc_and_read (input, versymhdr->sh_size, | |
10101 | versymhdr->sh_size)) == NULL) | |
c152c796 | 10102 | { |
c152c796 | 10103 | free (isymbuf); |
0a1b45a2 | 10104 | return false; |
c152c796 AM |
10105 | } |
10106 | ||
10107 | ever = extversym + extsymoff; | |
10108 | isymend = isymbuf + extsymcount; | |
10109 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
10110 | { | |
10111 | const char *name; | |
10112 | Elf_Internal_Versym iver; | |
10113 | unsigned short version_index; | |
10114 | ||
10115 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL | |
10116 | || isym->st_shndx == SHN_UNDEF) | |
10117 | continue; | |
10118 | ||
10119 | name = bfd_elf_string_from_elf_section (input, | |
10120 | hdr->sh_link, | |
10121 | isym->st_name); | |
10122 | if (strcmp (name, h->root.root.string) != 0) | |
10123 | continue; | |
10124 | ||
10125 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
10126 | ||
d023c380 L |
10127 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 |
10128 | && !(h->def_regular | |
10129 | && h->forced_local)) | |
c152c796 AM |
10130 | { |
10131 | /* If we have a non-hidden versioned sym, then it should | |
d023c380 L |
10132 | have provided a definition for the undefined sym unless |
10133 | it is defined in a non-shared object and forced local. | |
10134 | */ | |
c152c796 AM |
10135 | abort (); |
10136 | } | |
10137 | ||
10138 | version_index = iver.vs_vers & VERSYM_VERSION; | |
10139 | if (version_index == 1 || version_index == 2) | |
10140 | { | |
10141 | /* This is the base or first version. We can use it. */ | |
10142 | free (extversym); | |
10143 | free (isymbuf); | |
0a1b45a2 | 10144 | return true; |
c152c796 AM |
10145 | } |
10146 | } | |
10147 | ||
10148 | free (extversym); | |
10149 | free (isymbuf); | |
10150 | } | |
10151 | ||
0a1b45a2 | 10152 | return false; |
c152c796 AM |
10153 | } |
10154 | ||
b8871f35 L |
10155 | /* Convert ELF common symbol TYPE. */ |
10156 | ||
10157 | static int | |
10158 | elf_link_convert_common_type (struct bfd_link_info *info, int type) | |
10159 | { | |
10160 | /* Commom symbol can only appear in relocatable link. */ | |
10161 | if (!bfd_link_relocatable (info)) | |
10162 | abort (); | |
10163 | switch (info->elf_stt_common) | |
10164 | { | |
10165 | case unchanged: | |
10166 | break; | |
10167 | case elf_stt_common: | |
10168 | type = STT_COMMON; | |
10169 | break; | |
10170 | case no_elf_stt_common: | |
10171 | type = STT_OBJECT; | |
10172 | break; | |
10173 | } | |
10174 | return type; | |
10175 | } | |
10176 | ||
c152c796 AM |
10177 | /* Add an external symbol to the symbol table. This is called from |
10178 | the hash table traversal routine. When generating a shared object, | |
10179 | we go through the symbol table twice. The first time we output | |
10180 | anything that might have been forced to local scope in a version | |
10181 | script. The second time we output the symbols that are still | |
10182 | global symbols. */ | |
10183 | ||
0a1b45a2 | 10184 | static bool |
7686d77d | 10185 | elf_link_output_extsym (struct bfd_hash_entry *bh, void *data) |
c152c796 | 10186 | { |
7686d77d | 10187 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; |
a50b1753 | 10188 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; |
8b127cbc | 10189 | struct elf_final_link_info *flinfo = eoinfo->flinfo; |
0a1b45a2 | 10190 | bool strip; |
c152c796 AM |
10191 | Elf_Internal_Sym sym; |
10192 | asection *input_sec; | |
10193 | const struct elf_backend_data *bed; | |
6e0b88f1 AM |
10194 | long indx; |
10195 | int ret; | |
b8871f35 | 10196 | unsigned int type; |
c152c796 AM |
10197 | |
10198 | if (h->root.type == bfd_link_hash_warning) | |
10199 | { | |
10200 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10201 | if (h->root.type == bfd_link_hash_new) | |
0a1b45a2 | 10202 | return true; |
c152c796 AM |
10203 | } |
10204 | ||
10205 | /* Decide whether to output this symbol in this pass. */ | |
10206 | if (eoinfo->localsyms) | |
10207 | { | |
4deb8f71 | 10208 | if (!h->forced_local) |
0a1b45a2 | 10209 | return true; |
c152c796 AM |
10210 | } |
10211 | else | |
10212 | { | |
4deb8f71 | 10213 | if (h->forced_local) |
0a1b45a2 | 10214 | return true; |
c152c796 AM |
10215 | } |
10216 | ||
8b127cbc | 10217 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 | 10218 | |
12ac1cf5 | 10219 | if (h->root.type == bfd_link_hash_undefined) |
c152c796 | 10220 | { |
12ac1cf5 NC |
10221 | /* If we have an undefined symbol reference here then it must have |
10222 | come from a shared library that is being linked in. (Undefined | |
98da7939 L |
10223 | references in regular files have already been handled unless |
10224 | they are in unreferenced sections which are removed by garbage | |
10225 | collection). */ | |
0a1b45a2 | 10226 | bool ignore_undef = false; |
12ac1cf5 NC |
10227 | |
10228 | /* Some symbols may be special in that the fact that they're | |
10229 | undefined can be safely ignored - let backend determine that. */ | |
10230 | if (bed->elf_backend_ignore_undef_symbol) | |
10231 | ignore_undef = bed->elf_backend_ignore_undef_symbol (h); | |
10232 | ||
10233 | /* If we are reporting errors for this situation then do so now. */ | |
89a2ee5a | 10234 | if (!ignore_undef |
c54f1524 | 10235 | && h->ref_dynamic_nonweak |
8b127cbc AM |
10236 | && (!h->ref_regular || flinfo->info->gc_sections) |
10237 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h) | |
10238 | && flinfo->info->unresolved_syms_in_shared_libs != RM_IGNORE) | |
95a51568 FS |
10239 | { |
10240 | flinfo->info->callbacks->undefined_symbol | |
10241 | (flinfo->info, h->root.root.string, | |
10242 | h->ref_regular ? NULL : h->root.u.undef.abfd, NULL, 0, | |
10243 | flinfo->info->unresolved_syms_in_shared_libs == RM_DIAGNOSE | |
10244 | && !flinfo->info->warn_unresolved_syms); | |
10245 | } | |
97196564 L |
10246 | |
10247 | /* Strip a global symbol defined in a discarded section. */ | |
10248 | if (h->indx == -3) | |
0a1b45a2 | 10249 | return true; |
c152c796 AM |
10250 | } |
10251 | ||
10252 | /* We should also warn if a forced local symbol is referenced from | |
10253 | shared libraries. */ | |
0e1862bb | 10254 | if (bfd_link_executable (flinfo->info) |
f5385ebf AM |
10255 | && h->forced_local |
10256 | && h->ref_dynamic | |
371a5866 | 10257 | && h->def_regular |
f5385ebf | 10258 | && !h->dynamic_def |
ee659f1f | 10259 | && h->ref_dynamic_nonweak |
8b127cbc | 10260 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h)) |
c152c796 | 10261 | { |
17d078c5 AM |
10262 | bfd *def_bfd; |
10263 | const char *msg; | |
90c984fc L |
10264 | struct elf_link_hash_entry *hi = h; |
10265 | ||
10266 | /* Check indirect symbol. */ | |
10267 | while (hi->root.type == bfd_link_hash_indirect) | |
10268 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
17d078c5 AM |
10269 | |
10270 | if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
695344c0 | 10271 | /* xgettext:c-format */ |
871b3ab2 | 10272 | msg = _("%pB: internal symbol `%s' in %pB is referenced by DSO"); |
17d078c5 | 10273 | else if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) |
695344c0 | 10274 | /* xgettext:c-format */ |
871b3ab2 | 10275 | msg = _("%pB: hidden symbol `%s' in %pB is referenced by DSO"); |
17d078c5 | 10276 | else |
695344c0 | 10277 | /* xgettext:c-format */ |
871b3ab2 | 10278 | msg = _("%pB: local symbol `%s' in %pB is referenced by DSO"); |
8b127cbc | 10279 | def_bfd = flinfo->output_bfd; |
90c984fc L |
10280 | if (hi->root.u.def.section != bfd_abs_section_ptr) |
10281 | def_bfd = hi->root.u.def.section->owner; | |
c08bb8dd AM |
10282 | _bfd_error_handler (msg, flinfo->output_bfd, |
10283 | h->root.root.string, def_bfd); | |
17d078c5 | 10284 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 AM |
10285 | eoinfo->failed = true; |
10286 | return false; | |
c152c796 AM |
10287 | } |
10288 | ||
10289 | /* We don't want to output symbols that have never been mentioned by | |
10290 | a regular file, or that we have been told to strip. However, if | |
10291 | h->indx is set to -2, the symbol is used by a reloc and we must | |
10292 | output it. */ | |
0a1b45a2 | 10293 | strip = false; |
c152c796 | 10294 | if (h->indx == -2) |
d983c8c5 | 10295 | ; |
f5385ebf | 10296 | else if ((h->def_dynamic |
77cfaee6 AM |
10297 | || h->ref_dynamic |
10298 | || h->root.type == bfd_link_hash_new) | |
f5385ebf AM |
10299 | && !h->def_regular |
10300 | && !h->ref_regular) | |
0a1b45a2 | 10301 | strip = true; |
8b127cbc | 10302 | else if (flinfo->info->strip == strip_all) |
0a1b45a2 | 10303 | strip = true; |
8b127cbc AM |
10304 | else if (flinfo->info->strip == strip_some |
10305 | && bfd_hash_lookup (flinfo->info->keep_hash, | |
0a1b45a2 AM |
10306 | h->root.root.string, false, false) == NULL) |
10307 | strip = true; | |
d56d55e7 AM |
10308 | else if ((h->root.type == bfd_link_hash_defined |
10309 | || h->root.type == bfd_link_hash_defweak) | |
8b127cbc | 10310 | && ((flinfo->info->strip_discarded |
dbaa2011 | 10311 | && discarded_section (h->root.u.def.section)) |
ca4be51c AM |
10312 | || ((h->root.u.def.section->flags & SEC_LINKER_CREATED) == 0 |
10313 | && h->root.u.def.section->owner != NULL | |
d56d55e7 | 10314 | && (h->root.u.def.section->owner->flags & BFD_PLUGIN) != 0))) |
0a1b45a2 | 10315 | strip = true; |
9e2278f5 AM |
10316 | else if ((h->root.type == bfd_link_hash_undefined |
10317 | || h->root.type == bfd_link_hash_undefweak) | |
10318 | && h->root.u.undef.abfd != NULL | |
10319 | && (h->root.u.undef.abfd->flags & BFD_PLUGIN) != 0) | |
0a1b45a2 | 10320 | strip = true; |
c152c796 | 10321 | |
b8871f35 L |
10322 | type = h->type; |
10323 | ||
c152c796 | 10324 | /* If we're stripping it, and it's not a dynamic symbol, there's |
d983c8c5 AM |
10325 | nothing else to do. However, if it is a forced local symbol or |
10326 | an ifunc symbol we need to give the backend finish_dynamic_symbol | |
10327 | function a chance to make it dynamic. */ | |
c152c796 AM |
10328 | if (strip |
10329 | && h->dynindx == -1 | |
b8871f35 | 10330 | && type != STT_GNU_IFUNC |
f5385ebf | 10331 | && !h->forced_local) |
0a1b45a2 | 10332 | return true; |
c152c796 AM |
10333 | |
10334 | sym.st_value = 0; | |
10335 | sym.st_size = h->size; | |
10336 | sym.st_other = h->other; | |
c152c796 AM |
10337 | switch (h->root.type) |
10338 | { | |
10339 | default: | |
10340 | case bfd_link_hash_new: | |
10341 | case bfd_link_hash_warning: | |
10342 | abort (); | |
0a1b45a2 | 10343 | return false; |
c152c796 AM |
10344 | |
10345 | case bfd_link_hash_undefined: | |
10346 | case bfd_link_hash_undefweak: | |
10347 | input_sec = bfd_und_section_ptr; | |
10348 | sym.st_shndx = SHN_UNDEF; | |
10349 | break; | |
10350 | ||
10351 | case bfd_link_hash_defined: | |
10352 | case bfd_link_hash_defweak: | |
10353 | { | |
10354 | input_sec = h->root.u.def.section; | |
10355 | if (input_sec->output_section != NULL) | |
10356 | { | |
10357 | sym.st_shndx = | |
8b127cbc | 10358 | _bfd_elf_section_from_bfd_section (flinfo->output_bfd, |
c152c796 AM |
10359 | input_sec->output_section); |
10360 | if (sym.st_shndx == SHN_BAD) | |
10361 | { | |
4eca0228 | 10362 | _bfd_error_handler |
695344c0 | 10363 | /* xgettext:c-format */ |
871b3ab2 | 10364 | (_("%pB: could not find output section %pA for input section %pA"), |
8b127cbc | 10365 | flinfo->output_bfd, input_sec->output_section, input_sec); |
17d078c5 | 10366 | bfd_set_error (bfd_error_nonrepresentable_section); |
0a1b45a2 AM |
10367 | eoinfo->failed = true; |
10368 | return false; | |
c152c796 AM |
10369 | } |
10370 | ||
10371 | /* ELF symbols in relocatable files are section relative, | |
10372 | but in nonrelocatable files they are virtual | |
10373 | addresses. */ | |
10374 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
0e1862bb | 10375 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10376 | { |
10377 | sym.st_value += input_sec->output_section->vma; | |
10378 | if (h->type == STT_TLS) | |
10379 | { | |
8b127cbc | 10380 | asection *tls_sec = elf_hash_table (flinfo->info)->tls_sec; |
430a16a5 NC |
10381 | if (tls_sec != NULL) |
10382 | sym.st_value -= tls_sec->vma; | |
c152c796 AM |
10383 | } |
10384 | } | |
10385 | } | |
10386 | else | |
10387 | { | |
10388 | BFD_ASSERT (input_sec->owner == NULL | |
10389 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
10390 | sym.st_shndx = SHN_UNDEF; | |
10391 | input_sec = bfd_und_section_ptr; | |
10392 | } | |
10393 | } | |
10394 | break; | |
10395 | ||
10396 | case bfd_link_hash_common: | |
10397 | input_sec = h->root.u.c.p->section; | |
a4d8e49b | 10398 | sym.st_shndx = bed->common_section_index (input_sec); |
c152c796 AM |
10399 | sym.st_value = 1 << h->root.u.c.p->alignment_power; |
10400 | break; | |
10401 | ||
10402 | case bfd_link_hash_indirect: | |
10403 | /* These symbols are created by symbol versioning. They point | |
10404 | to the decorated version of the name. For example, if the | |
10405 | symbol foo@@GNU_1.2 is the default, which should be used when | |
10406 | foo is used with no version, then we add an indirect symbol | |
10407 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
10408 | since the indirected symbol is already in the hash table. */ | |
0a1b45a2 | 10409 | return true; |
c152c796 AM |
10410 | } |
10411 | ||
b8871f35 L |
10412 | if (type == STT_COMMON || type == STT_OBJECT) |
10413 | switch (h->root.type) | |
10414 | { | |
10415 | case bfd_link_hash_common: | |
10416 | type = elf_link_convert_common_type (flinfo->info, type); | |
10417 | break; | |
10418 | case bfd_link_hash_defined: | |
10419 | case bfd_link_hash_defweak: | |
10420 | if (bed->common_definition (&sym)) | |
10421 | type = elf_link_convert_common_type (flinfo->info, type); | |
10422 | else | |
10423 | type = STT_OBJECT; | |
10424 | break; | |
10425 | case bfd_link_hash_undefined: | |
10426 | case bfd_link_hash_undefweak: | |
10427 | break; | |
10428 | default: | |
10429 | abort (); | |
10430 | } | |
10431 | ||
4deb8f71 | 10432 | if (h->forced_local) |
b8871f35 L |
10433 | { |
10434 | sym.st_info = ELF_ST_INFO (STB_LOCAL, type); | |
10435 | /* Turn off visibility on local symbol. */ | |
10436 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); | |
10437 | } | |
10438 | /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */ | |
10439 | else if (h->unique_global && h->def_regular) | |
10440 | sym.st_info = ELF_ST_INFO (STB_GNU_UNIQUE, type); | |
10441 | else if (h->root.type == bfd_link_hash_undefweak | |
10442 | || h->root.type == bfd_link_hash_defweak) | |
10443 | sym.st_info = ELF_ST_INFO (STB_WEAK, type); | |
10444 | else | |
10445 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, type); | |
10446 | sym.st_target_internal = h->target_internal; | |
10447 | ||
c152c796 AM |
10448 | /* Give the processor backend a chance to tweak the symbol value, |
10449 | and also to finish up anything that needs to be done for this | |
10450 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for | |
3aa14d16 | 10451 | forced local syms when non-shared is due to a historical quirk. |
5f35ea9c | 10452 | STT_GNU_IFUNC symbol must go through PLT. */ |
3aa14d16 | 10453 | if ((h->type == STT_GNU_IFUNC |
5f35ea9c | 10454 | && h->def_regular |
0e1862bb | 10455 | && !bfd_link_relocatable (flinfo->info)) |
3aa14d16 L |
10456 | || ((h->dynindx != -1 |
10457 | || h->forced_local) | |
0e1862bb | 10458 | && ((bfd_link_pic (flinfo->info) |
3aa14d16 L |
10459 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
10460 | || h->root.type != bfd_link_hash_undefweak)) | |
10461 | || !h->forced_local) | |
8b127cbc | 10462 | && elf_hash_table (flinfo->info)->dynamic_sections_created)) |
c152c796 AM |
10463 | { |
10464 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
8b127cbc | 10465 | (flinfo->output_bfd, flinfo->info, h, &sym))) |
c152c796 | 10466 | { |
0a1b45a2 AM |
10467 | eoinfo->failed = true; |
10468 | return false; | |
c152c796 AM |
10469 | } |
10470 | } | |
10471 | ||
10472 | /* If we are marking the symbol as undefined, and there are no | |
10473 | non-weak references to this symbol from a regular object, then | |
10474 | mark the symbol as weak undefined; if there are non-weak | |
10475 | references, mark the symbol as strong. We can't do this earlier, | |
10476 | because it might not be marked as undefined until the | |
10477 | finish_dynamic_symbol routine gets through with it. */ | |
10478 | if (sym.st_shndx == SHN_UNDEF | |
f5385ebf | 10479 | && h->ref_regular |
c152c796 AM |
10480 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
10481 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
10482 | { | |
10483 | int bindtype; | |
b8871f35 | 10484 | type = ELF_ST_TYPE (sym.st_info); |
2955ec4c L |
10485 | |
10486 | /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */ | |
10487 | if (type == STT_GNU_IFUNC) | |
10488 | type = STT_FUNC; | |
c152c796 | 10489 | |
f5385ebf | 10490 | if (h->ref_regular_nonweak) |
c152c796 AM |
10491 | bindtype = STB_GLOBAL; |
10492 | else | |
10493 | bindtype = STB_WEAK; | |
2955ec4c | 10494 | sym.st_info = ELF_ST_INFO (bindtype, type); |
c152c796 AM |
10495 | } |
10496 | ||
bda987c2 CD |
10497 | /* If this is a symbol defined in a dynamic library, don't use the |
10498 | symbol size from the dynamic library. Relinking an executable | |
10499 | against a new library may introduce gratuitous changes in the | |
10500 | executable's symbols if we keep the size. */ | |
10501 | if (sym.st_shndx == SHN_UNDEF | |
10502 | && !h->def_regular | |
10503 | && h->def_dynamic) | |
10504 | sym.st_size = 0; | |
10505 | ||
c152c796 AM |
10506 | /* If a non-weak symbol with non-default visibility is not defined |
10507 | locally, it is a fatal error. */ | |
0e1862bb | 10508 | if (!bfd_link_relocatable (flinfo->info) |
c152c796 AM |
10509 | && ELF_ST_VISIBILITY (sym.st_other) != STV_DEFAULT |
10510 | && ELF_ST_BIND (sym.st_info) != STB_WEAK | |
10511 | && h->root.type == bfd_link_hash_undefined | |
f5385ebf | 10512 | && !h->def_regular) |
c152c796 | 10513 | { |
17d078c5 AM |
10514 | const char *msg; |
10515 | ||
10516 | if (ELF_ST_VISIBILITY (sym.st_other) == STV_PROTECTED) | |
695344c0 | 10517 | /* xgettext:c-format */ |
871b3ab2 | 10518 | msg = _("%pB: protected symbol `%s' isn't defined"); |
17d078c5 | 10519 | else if (ELF_ST_VISIBILITY (sym.st_other) == STV_INTERNAL) |
695344c0 | 10520 | /* xgettext:c-format */ |
871b3ab2 | 10521 | msg = _("%pB: internal symbol `%s' isn't defined"); |
17d078c5 | 10522 | else |
695344c0 | 10523 | /* xgettext:c-format */ |
871b3ab2 | 10524 | msg = _("%pB: hidden symbol `%s' isn't defined"); |
4eca0228 | 10525 | _bfd_error_handler (msg, flinfo->output_bfd, h->root.root.string); |
17d078c5 | 10526 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 AM |
10527 | eoinfo->failed = true; |
10528 | return false; | |
c152c796 AM |
10529 | } |
10530 | ||
10531 | /* If this symbol should be put in the .dynsym section, then put it | |
10532 | there now. We already know the symbol index. We also fill in | |
10533 | the entry in the .hash section. */ | |
1c2649ed EB |
10534 | if (h->dynindx != -1 |
10535 | && elf_hash_table (flinfo->info)->dynamic_sections_created | |
10536 | && elf_hash_table (flinfo->info)->dynsym != NULL | |
10537 | && !discarded_section (elf_hash_table (flinfo->info)->dynsym)) | |
c152c796 | 10538 | { |
c152c796 AM |
10539 | bfd_byte *esym; |
10540 | ||
90c984fc L |
10541 | /* Since there is no version information in the dynamic string, |
10542 | if there is no version info in symbol version section, we will | |
1659f720 | 10543 | have a run-time problem if not linking executable, referenced |
4deb8f71 | 10544 | by shared library, or not bound locally. */ |
1659f720 | 10545 | if (h->verinfo.verdef == NULL |
0e1862bb | 10546 | && (!bfd_link_executable (flinfo->info) |
1659f720 L |
10547 | || h->ref_dynamic |
10548 | || !h->def_regular)) | |
90c984fc L |
10549 | { |
10550 | char *p = strrchr (h->root.root.string, ELF_VER_CHR); | |
10551 | ||
10552 | if (p && p [1] != '\0') | |
10553 | { | |
4eca0228 | 10554 | _bfd_error_handler |
695344c0 | 10555 | /* xgettext:c-format */ |
9793eb77 | 10556 | (_("%pB: no symbol version section for versioned symbol `%s'"), |
90c984fc | 10557 | flinfo->output_bfd, h->root.root.string); |
0a1b45a2 AM |
10558 | eoinfo->failed = true; |
10559 | return false; | |
90c984fc L |
10560 | } |
10561 | } | |
10562 | ||
c152c796 | 10563 | sym.st_name = h->dynstr_index; |
cae1fbbb L |
10564 | esym = (elf_hash_table (flinfo->info)->dynsym->contents |
10565 | + h->dynindx * bed->s->sizeof_sym); | |
8b127cbc | 10566 | if (!check_dynsym (flinfo->output_bfd, &sym)) |
c0d5a53d | 10567 | { |
0a1b45a2 AM |
10568 | eoinfo->failed = true; |
10569 | return false; | |
c0d5a53d | 10570 | } |
3d16b64e NA |
10571 | |
10572 | /* Inform the linker of the addition of this symbol. */ | |
10573 | ||
10574 | if (flinfo->info->callbacks->ctf_new_dynsym) | |
10575 | flinfo->info->callbacks->ctf_new_dynsym (h->dynindx, &sym); | |
10576 | ||
8b127cbc | 10577 | bed->s->swap_symbol_out (flinfo->output_bfd, &sym, esym, 0); |
c152c796 | 10578 | |
8b127cbc | 10579 | if (flinfo->hash_sec != NULL) |
fdc90cb4 JJ |
10580 | { |
10581 | size_t hash_entry_size; | |
10582 | bfd_byte *bucketpos; | |
10583 | bfd_vma chain; | |
41198d0c L |
10584 | size_t bucketcount; |
10585 | size_t bucket; | |
10586 | ||
8b127cbc | 10587 | bucketcount = elf_hash_table (flinfo->info)->bucketcount; |
41198d0c | 10588 | bucket = h->u.elf_hash_value % bucketcount; |
fdc90cb4 JJ |
10589 | |
10590 | hash_entry_size | |
8b127cbc AM |
10591 | = elf_section_data (flinfo->hash_sec)->this_hdr.sh_entsize; |
10592 | bucketpos = ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 | 10593 | + (bucket + 2) * hash_entry_size); |
8b127cbc AM |
10594 | chain = bfd_get (8 * hash_entry_size, flinfo->output_bfd, bucketpos); |
10595 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, h->dynindx, | |
10596 | bucketpos); | |
10597 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, chain, | |
10598 | ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 JJ |
10599 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); |
10600 | } | |
c152c796 | 10601 | |
8b127cbc | 10602 | if (flinfo->symver_sec != NULL && flinfo->symver_sec->contents != NULL) |
c152c796 AM |
10603 | { |
10604 | Elf_Internal_Versym iversym; | |
10605 | Elf_External_Versym *eversym; | |
10606 | ||
5fa370e4 | 10607 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
c152c796 | 10608 | { |
7b20f099 AM |
10609 | if (h->verinfo.verdef == NULL |
10610 | || (elf_dyn_lib_class (h->verinfo.verdef->vd_bfd) | |
10611 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | DYN_NO_NEEDED))) | |
eb6e6af8 | 10612 | iversym.vs_vers = 1; |
c152c796 AM |
10613 | else |
10614 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
10615 | } | |
10616 | else | |
10617 | { | |
10618 | if (h->verinfo.vertree == NULL) | |
10619 | iversym.vs_vers = 1; | |
10620 | else | |
10621 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
8b127cbc | 10622 | if (flinfo->info->create_default_symver) |
3e3b46e5 | 10623 | iversym.vs_vers++; |
c152c796 AM |
10624 | } |
10625 | ||
422f1182 | 10626 | /* Turn on VERSYM_HIDDEN only if the hidden versioned symbol is |
6e33951e | 10627 | defined locally. */ |
422f1182 | 10628 | if (h->versioned == versioned_hidden && h->def_regular) |
c152c796 AM |
10629 | iversym.vs_vers |= VERSYM_HIDDEN; |
10630 | ||
8b127cbc | 10631 | eversym = (Elf_External_Versym *) flinfo->symver_sec->contents; |
c152c796 | 10632 | eversym += h->dynindx; |
8b127cbc | 10633 | _bfd_elf_swap_versym_out (flinfo->output_bfd, &iversym, eversym); |
c152c796 AM |
10634 | } |
10635 | } | |
10636 | ||
d983c8c5 AM |
10637 | /* If the symbol is undefined, and we didn't output it to .dynsym, |
10638 | strip it from .symtab too. Obviously we can't do this for | |
10639 | relocatable output or when needed for --emit-relocs. */ | |
10640 | else if (input_sec == bfd_und_section_ptr | |
10641 | && h->indx != -2 | |
66cae560 NC |
10642 | /* PR 22319 Do not strip global undefined symbols marked as being needed. */ |
10643 | && (h->mark != 1 || ELF_ST_BIND (sym.st_info) != STB_GLOBAL) | |
0e1862bb | 10644 | && !bfd_link_relocatable (flinfo->info)) |
0a1b45a2 | 10645 | return true; |
66cae560 | 10646 | |
d983c8c5 AM |
10647 | /* Also strip others that we couldn't earlier due to dynamic symbol |
10648 | processing. */ | |
10649 | if (strip) | |
0a1b45a2 | 10650 | return true; |
d983c8c5 | 10651 | if ((input_sec->flags & SEC_EXCLUDE) != 0) |
0a1b45a2 | 10652 | return true; |
c152c796 | 10653 | |
2ec55de3 AM |
10654 | /* Output a FILE symbol so that following locals are not associated |
10655 | with the wrong input file. We need one for forced local symbols | |
10656 | if we've seen more than one FILE symbol or when we have exactly | |
10657 | one FILE symbol but global symbols are present in a file other | |
10658 | than the one with the FILE symbol. We also need one if linker | |
10659 | defined symbols are present. In practice these conditions are | |
10660 | always met, so just emit the FILE symbol unconditionally. */ | |
10661 | if (eoinfo->localsyms | |
10662 | && !eoinfo->file_sym_done | |
10663 | && eoinfo->flinfo->filesym_count != 0) | |
10664 | { | |
10665 | Elf_Internal_Sym fsym; | |
10666 | ||
10667 | memset (&fsym, 0, sizeof (fsym)); | |
10668 | fsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
10669 | fsym.st_shndx = SHN_ABS; | |
ef10c3ac L |
10670 | if (!elf_link_output_symstrtab (eoinfo->flinfo, NULL, &fsym, |
10671 | bfd_und_section_ptr, NULL)) | |
0a1b45a2 | 10672 | return false; |
2ec55de3 | 10673 | |
0a1b45a2 | 10674 | eoinfo->file_sym_done = true; |
2ec55de3 AM |
10675 | } |
10676 | ||
8b127cbc | 10677 | indx = bfd_get_symcount (flinfo->output_bfd); |
ef10c3ac L |
10678 | ret = elf_link_output_symstrtab (flinfo, h->root.root.string, &sym, |
10679 | input_sec, h); | |
6e0b88f1 | 10680 | if (ret == 0) |
c152c796 | 10681 | { |
0a1b45a2 AM |
10682 | eoinfo->failed = true; |
10683 | return false; | |
c152c796 | 10684 | } |
6e0b88f1 AM |
10685 | else if (ret == 1) |
10686 | h->indx = indx; | |
10687 | else if (h->indx == -2) | |
10688 | abort(); | |
c152c796 | 10689 | |
0a1b45a2 | 10690 | return true; |
c152c796 AM |
10691 | } |
10692 | ||
cdd3575c AM |
10693 | /* Return TRUE if special handling is done for relocs in SEC against |
10694 | symbols defined in discarded sections. */ | |
10695 | ||
0a1b45a2 | 10696 | static bool |
c152c796 AM |
10697 | elf_section_ignore_discarded_relocs (asection *sec) |
10698 | { | |
10699 | const struct elf_backend_data *bed; | |
10700 | ||
cdd3575c AM |
10701 | switch (sec->sec_info_type) |
10702 | { | |
dbaa2011 AM |
10703 | case SEC_INFO_TYPE_STABS: |
10704 | case SEC_INFO_TYPE_EH_FRAME: | |
2f0c68f2 | 10705 | case SEC_INFO_TYPE_EH_FRAME_ENTRY: |
0a1b45a2 | 10706 | return true; |
cdd3575c AM |
10707 | default: |
10708 | break; | |
10709 | } | |
c152c796 AM |
10710 | |
10711 | bed = get_elf_backend_data (sec->owner); | |
10712 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
10713 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
0a1b45a2 | 10714 | return true; |
c152c796 | 10715 | |
0a1b45a2 | 10716 | return false; |
c152c796 AM |
10717 | } |
10718 | ||
9e66c942 AM |
10719 | /* Return a mask saying how ld should treat relocations in SEC against |
10720 | symbols defined in discarded sections. If this function returns | |
10721 | COMPLAIN set, ld will issue a warning message. If this function | |
10722 | returns PRETEND set, and the discarded section was link-once and the | |
10723 | same size as the kept link-once section, ld will pretend that the | |
10724 | symbol was actually defined in the kept section. Otherwise ld will | |
10725 | zero the reloc (at least that is the intent, but some cooperation by | |
10726 | the target dependent code is needed, particularly for REL targets). */ | |
10727 | ||
8a696751 AM |
10728 | unsigned int |
10729 | _bfd_elf_default_action_discarded (asection *sec) | |
cdd3575c | 10730 | { |
9e66c942 | 10731 | if (sec->flags & SEC_DEBUGGING) |
69d54b1b | 10732 | return PRETEND; |
cdd3575c AM |
10733 | |
10734 | if (strcmp (".eh_frame", sec->name) == 0) | |
9e66c942 | 10735 | return 0; |
cdd3575c AM |
10736 | |
10737 | if (strcmp (".gcc_except_table", sec->name) == 0) | |
9e66c942 | 10738 | return 0; |
cdd3575c | 10739 | |
9e66c942 | 10740 | return COMPLAIN | PRETEND; |
cdd3575c AM |
10741 | } |
10742 | ||
3d7f7666 L |
10743 | /* Find a match between a section and a member of a section group. */ |
10744 | ||
10745 | static asection * | |
c0f00686 L |
10746 | match_group_member (asection *sec, asection *group, |
10747 | struct bfd_link_info *info) | |
3d7f7666 L |
10748 | { |
10749 | asection *first = elf_next_in_group (group); | |
10750 | asection *s = first; | |
10751 | ||
10752 | while (s != NULL) | |
10753 | { | |
c0f00686 | 10754 | if (bfd_elf_match_symbols_in_sections (s, sec, info)) |
3d7f7666 L |
10755 | return s; |
10756 | ||
83180ade | 10757 | s = elf_next_in_group (s); |
3d7f7666 L |
10758 | if (s == first) |
10759 | break; | |
10760 | } | |
10761 | ||
10762 | return NULL; | |
10763 | } | |
10764 | ||
01b3c8ab | 10765 | /* Check if the kept section of a discarded section SEC can be used |
c2370991 AM |
10766 | to replace it. Return the replacement if it is OK. Otherwise return |
10767 | NULL. */ | |
01b3c8ab L |
10768 | |
10769 | asection * | |
c0f00686 | 10770 | _bfd_elf_check_kept_section (asection *sec, struct bfd_link_info *info) |
01b3c8ab L |
10771 | { |
10772 | asection *kept; | |
10773 | ||
10774 | kept = sec->kept_section; | |
10775 | if (kept != NULL) | |
10776 | { | |
c2370991 | 10777 | if ((kept->flags & SEC_GROUP) != 0) |
c0f00686 | 10778 | kept = match_group_member (sec, kept, info); |
58349d00 L |
10779 | if (kept != NULL) |
10780 | { | |
10781 | if ((sec->rawsize != 0 ? sec->rawsize : sec->size) | |
10782 | != (kept->rawsize != 0 ? kept->rawsize : kept->size)) | |
10783 | kept = NULL; | |
10784 | else | |
10785 | { | |
10786 | /* Get the real kept section. */ | |
10787 | asection *next; | |
10788 | for (next = kept->kept_section; | |
10789 | next != NULL; | |
10790 | next = next->kept_section) | |
10791 | kept = next; | |
10792 | } | |
10793 | } | |
c2370991 | 10794 | sec->kept_section = kept; |
01b3c8ab L |
10795 | } |
10796 | return kept; | |
10797 | } | |
10798 | ||
c152c796 AM |
10799 | /* Link an input file into the linker output file. This function |
10800 | handles all the sections and relocations of the input file at once. | |
10801 | This is so that we only have to read the local symbols once, and | |
10802 | don't have to keep them in memory. */ | |
10803 | ||
0a1b45a2 | 10804 | static bool |
8b127cbc | 10805 | elf_link_input_bfd (struct elf_final_link_info *flinfo, bfd *input_bfd) |
c152c796 | 10806 | { |
ece5ef60 | 10807 | int (*relocate_section) |
c152c796 AM |
10808 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
10809 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); | |
10810 | bfd *output_bfd; | |
10811 | Elf_Internal_Shdr *symtab_hdr; | |
10812 | size_t locsymcount; | |
10813 | size_t extsymoff; | |
10814 | Elf_Internal_Sym *isymbuf; | |
10815 | Elf_Internal_Sym *isym; | |
10816 | Elf_Internal_Sym *isymend; | |
10817 | long *pindex; | |
10818 | asection **ppsection; | |
10819 | asection *o; | |
10820 | const struct elf_backend_data *bed; | |
c152c796 | 10821 | struct elf_link_hash_entry **sym_hashes; |
310fd250 L |
10822 | bfd_size_type address_size; |
10823 | bfd_vma r_type_mask; | |
10824 | int r_sym_shift; | |
0a1b45a2 | 10825 | bool have_file_sym = false; |
c152c796 | 10826 | |
8b127cbc | 10827 | output_bfd = flinfo->output_bfd; |
c152c796 AM |
10828 | bed = get_elf_backend_data (output_bfd); |
10829 | relocate_section = bed->elf_backend_relocate_section; | |
10830 | ||
10831 | /* If this is a dynamic object, we don't want to do anything here: | |
10832 | we don't want the local symbols, and we don't want the section | |
10833 | contents. */ | |
10834 | if ((input_bfd->flags & DYNAMIC) != 0) | |
0a1b45a2 | 10835 | return true; |
c152c796 | 10836 | |
c152c796 AM |
10837 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
10838 | if (elf_bad_symtab (input_bfd)) | |
10839 | { | |
10840 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
10841 | extsymoff = 0; | |
10842 | } | |
10843 | else | |
10844 | { | |
10845 | locsymcount = symtab_hdr->sh_info; | |
10846 | extsymoff = symtab_hdr->sh_info; | |
10847 | } | |
10848 | ||
99fabbc9 JL |
10849 | /* Enable GNU OSABI features in the output BFD that are used in the input |
10850 | BFD. */ | |
10851 | if (bed->elf_osabi == ELFOSABI_NONE | |
10852 | || bed->elf_osabi == ELFOSABI_GNU | |
10853 | || bed->elf_osabi == ELFOSABI_FREEBSD) | |
10854 | elf_tdata (output_bfd)->has_gnu_osabi | |
04f89674 L |
10855 | |= (elf_tdata (input_bfd)->has_gnu_osabi |
10856 | & (bfd_link_relocatable (flinfo->info) | |
10857 | ? -1 : ~elf_gnu_osabi_retain)); | |
99fabbc9 | 10858 | |
c152c796 AM |
10859 | /* Read the local symbols. */ |
10860 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
10861 | if (isymbuf == NULL && locsymcount != 0) | |
10862 | { | |
10863 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
8b127cbc AM |
10864 | flinfo->internal_syms, |
10865 | flinfo->external_syms, | |
10866 | flinfo->locsym_shndx); | |
c152c796 | 10867 | if (isymbuf == NULL) |
0a1b45a2 | 10868 | return false; |
c152c796 AM |
10869 | } |
10870 | ||
10871 | /* Find local symbol sections and adjust values of symbols in | |
10872 | SEC_MERGE sections. Write out those local symbols we know are | |
10873 | going into the output file. */ | |
10874 | isymend = isymbuf + locsymcount; | |
8b127cbc | 10875 | for (isym = isymbuf, pindex = flinfo->indices, ppsection = flinfo->sections; |
c152c796 AM |
10876 | isym < isymend; |
10877 | isym++, pindex++, ppsection++) | |
10878 | { | |
10879 | asection *isec; | |
10880 | const char *name; | |
10881 | Elf_Internal_Sym osym; | |
6e0b88f1 AM |
10882 | long indx; |
10883 | int ret; | |
c152c796 AM |
10884 | |
10885 | *pindex = -1; | |
10886 | ||
10887 | if (elf_bad_symtab (input_bfd)) | |
10888 | { | |
10889 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
10890 | { | |
10891 | *ppsection = NULL; | |
10892 | continue; | |
10893 | } | |
10894 | } | |
10895 | ||
10896 | if (isym->st_shndx == SHN_UNDEF) | |
10897 | isec = bfd_und_section_ptr; | |
c152c796 AM |
10898 | else if (isym->st_shndx == SHN_ABS) |
10899 | isec = bfd_abs_section_ptr; | |
10900 | else if (isym->st_shndx == SHN_COMMON) | |
10901 | isec = bfd_com_section_ptr; | |
10902 | else | |
10903 | { | |
cb33740c AM |
10904 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
10905 | if (isec == NULL) | |
10906 | { | |
10907 | /* Don't attempt to output symbols with st_shnx in the | |
10908 | reserved range other than SHN_ABS and SHN_COMMON. */ | |
6835821b | 10909 | isec = bfd_und_section_ptr; |
cb33740c | 10910 | } |
dbaa2011 | 10911 | else if (isec->sec_info_type == SEC_INFO_TYPE_MERGE |
cb33740c AM |
10912 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
10913 | isym->st_value = | |
10914 | _bfd_merged_section_offset (output_bfd, &isec, | |
10915 | elf_section_data (isec)->sec_info, | |
10916 | isym->st_value); | |
c152c796 AM |
10917 | } |
10918 | ||
10919 | *ppsection = isec; | |
10920 | ||
d983c8c5 AM |
10921 | /* Don't output the first, undefined, symbol. In fact, don't |
10922 | output any undefined local symbol. */ | |
10923 | if (isec == bfd_und_section_ptr) | |
c152c796 AM |
10924 | continue; |
10925 | ||
10926 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
10927 | { | |
10928 | /* We never output section symbols. Instead, we use the | |
10929 | section symbol of the corresponding section in the output | |
10930 | file. */ | |
10931 | continue; | |
10932 | } | |
10933 | ||
10934 | /* If we are stripping all symbols, we don't want to output this | |
10935 | one. */ | |
8b127cbc | 10936 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
10937 | continue; |
10938 | ||
10939 | /* If we are discarding all local symbols, we don't want to | |
10940 | output this one. If we are generating a relocatable output | |
10941 | file, then some of the local symbols may be required by | |
10942 | relocs; we output them below as we discover that they are | |
10943 | needed. */ | |
8b127cbc | 10944 | if (flinfo->info->discard == discard_all) |
c152c796 AM |
10945 | continue; |
10946 | ||
10947 | /* If this symbol is defined in a section which we are | |
f02571c5 | 10948 | discarding, we don't need to keep it. */ |
abf874aa CL |
10949 | if (isym->st_shndx != SHN_UNDEF |
10950 | && isym->st_shndx < SHN_LORESERVE | |
10951 | && isec->output_section == NULL | |
10952 | && flinfo->info->non_contiguous_regions | |
10953 | && flinfo->info->non_contiguous_regions_warnings) | |
10954 | { | |
10955 | _bfd_error_handler (_("warning: --enable-non-contiguous-regions " | |
10956 | "discards section `%s' from '%s'\n"), | |
765cf5f6 | 10957 | isec->name, bfd_get_filename (isec->owner)); |
abf874aa CL |
10958 | continue; |
10959 | } | |
10960 | ||
f02571c5 | 10961 | if (isym->st_shndx != SHN_UNDEF |
4fbb74a6 AM |
10962 | && isym->st_shndx < SHN_LORESERVE |
10963 | && bfd_section_removed_from_list (output_bfd, | |
10964 | isec->output_section)) | |
e75a280b L |
10965 | continue; |
10966 | ||
c152c796 AM |
10967 | /* Get the name of the symbol. */ |
10968 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
10969 | isym->st_name); | |
10970 | if (name == NULL) | |
0a1b45a2 | 10971 | return false; |
c152c796 AM |
10972 | |
10973 | /* See if we are discarding symbols with this name. */ | |
8b127cbc | 10974 | if ((flinfo->info->strip == strip_some |
0a1b45a2 | 10975 | && (bfd_hash_lookup (flinfo->info->keep_hash, name, false, false) |
c152c796 | 10976 | == NULL)) |
8b127cbc | 10977 | || (((flinfo->info->discard == discard_sec_merge |
0e1862bb L |
10978 | && (isec->flags & SEC_MERGE) |
10979 | && !bfd_link_relocatable (flinfo->info)) | |
8b127cbc | 10980 | || flinfo->info->discard == discard_l) |
c152c796 AM |
10981 | && bfd_is_local_label_name (input_bfd, name))) |
10982 | continue; | |
10983 | ||
ffbc01cc AM |
10984 | if (ELF_ST_TYPE (isym->st_info) == STT_FILE) |
10985 | { | |
ce875075 AM |
10986 | if (input_bfd->lto_output) |
10987 | /* -flto puts a temp file name here. This means builds | |
10988 | are not reproducible. Discard the symbol. */ | |
10989 | continue; | |
0a1b45a2 | 10990 | have_file_sym = true; |
ffbc01cc AM |
10991 | flinfo->filesym_count += 1; |
10992 | } | |
10993 | if (!have_file_sym) | |
10994 | { | |
10995 | /* In the absence of debug info, bfd_find_nearest_line uses | |
10996 | FILE symbols to determine the source file for local | |
10997 | function symbols. Provide a FILE symbol here if input | |
10998 | files lack such, so that their symbols won't be | |
10999 | associated with a previous input file. It's not the | |
11000 | source file, but the best we can do. */ | |
5b4293ba | 11001 | const char *filename; |
0a1b45a2 | 11002 | have_file_sym = true; |
ffbc01cc AM |
11003 | flinfo->filesym_count += 1; |
11004 | memset (&osym, 0, sizeof (osym)); | |
11005 | osym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
11006 | osym.st_shndx = SHN_ABS; | |
5b4293ba AM |
11007 | if (input_bfd->lto_output) |
11008 | filename = NULL; | |
11009 | else | |
11010 | filename = lbasename (bfd_get_filename (input_bfd)); | |
11011 | if (!elf_link_output_symstrtab (flinfo, filename, &osym, | |
11012 | bfd_abs_section_ptr, NULL)) | |
0a1b45a2 | 11013 | return false; |
ffbc01cc AM |
11014 | } |
11015 | ||
c152c796 AM |
11016 | osym = *isym; |
11017 | ||
11018 | /* Adjust the section index for the output file. */ | |
11019 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
11020 | isec->output_section); | |
11021 | if (osym.st_shndx == SHN_BAD) | |
0a1b45a2 | 11022 | return false; |
c152c796 | 11023 | |
c152c796 AM |
11024 | /* ELF symbols in relocatable files are section relative, but |
11025 | in executable files they are virtual addresses. Note that | |
11026 | this code assumes that all ELF sections have an associated | |
11027 | BFD section with a reasonable value for output_offset; below | |
11028 | we assume that they also have a reasonable value for | |
11029 | output_section. Any special sections must be set up to meet | |
11030 | these requirements. */ | |
11031 | osym.st_value += isec->output_offset; | |
0e1862bb | 11032 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
11033 | { |
11034 | osym.st_value += isec->output_section->vma; | |
11035 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
11036 | { | |
11037 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
102def4d AM |
11038 | if (elf_hash_table (flinfo->info)->tls_sec != NULL) |
11039 | osym.st_value -= elf_hash_table (flinfo->info)->tls_sec->vma; | |
11040 | else | |
11041 | osym.st_info = ELF_ST_INFO (ELF_ST_BIND (osym.st_info), | |
11042 | STT_NOTYPE); | |
c152c796 AM |
11043 | } |
11044 | } | |
11045 | ||
6e0b88f1 | 11046 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac | 11047 | ret = elf_link_output_symstrtab (flinfo, name, &osym, isec, NULL); |
6e0b88f1 | 11048 | if (ret == 0) |
0a1b45a2 | 11049 | return false; |
6e0b88f1 AM |
11050 | else if (ret == 1) |
11051 | *pindex = indx; | |
c152c796 AM |
11052 | } |
11053 | ||
310fd250 L |
11054 | if (bed->s->arch_size == 32) |
11055 | { | |
11056 | r_type_mask = 0xff; | |
11057 | r_sym_shift = 8; | |
11058 | address_size = 4; | |
11059 | } | |
11060 | else | |
11061 | { | |
11062 | r_type_mask = 0xffffffff; | |
11063 | r_sym_shift = 32; | |
11064 | address_size = 8; | |
11065 | } | |
11066 | ||
c152c796 AM |
11067 | /* Relocate the contents of each section. */ |
11068 | sym_hashes = elf_sym_hashes (input_bfd); | |
11069 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
11070 | { | |
11071 | bfd_byte *contents; | |
11072 | ||
11073 | if (! o->linker_mark) | |
11074 | { | |
11075 | /* This section was omitted from the link. */ | |
11076 | continue; | |
11077 | } | |
11078 | ||
7bdf4127 | 11079 | if (!flinfo->info->resolve_section_groups |
bcacc0f5 AM |
11080 | && (o->flags & (SEC_LINKER_CREATED | SEC_GROUP)) == SEC_GROUP) |
11081 | { | |
11082 | /* Deal with the group signature symbol. */ | |
11083 | struct bfd_elf_section_data *sec_data = elf_section_data (o); | |
11084 | unsigned long symndx = sec_data->this_hdr.sh_info; | |
11085 | asection *osec = o->output_section; | |
11086 | ||
7bdf4127 | 11087 | BFD_ASSERT (bfd_link_relocatable (flinfo->info)); |
bcacc0f5 AM |
11088 | if (symndx >= locsymcount |
11089 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 11090 | && flinfo->sections[symndx] == NULL)) |
bcacc0f5 AM |
11091 | { |
11092 | struct elf_link_hash_entry *h = sym_hashes[symndx - extsymoff]; | |
11093 | while (h->root.type == bfd_link_hash_indirect | |
11094 | || h->root.type == bfd_link_hash_warning) | |
11095 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
11096 | /* Arrange for symbol to be output. */ | |
11097 | h->indx = -2; | |
11098 | elf_section_data (osec)->this_hdr.sh_info = -2; | |
11099 | } | |
11100 | else if (ELF_ST_TYPE (isymbuf[symndx].st_info) == STT_SECTION) | |
11101 | { | |
11102 | /* We'll use the output section target_index. */ | |
8b127cbc | 11103 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 AM |
11104 | elf_section_data (osec)->this_hdr.sh_info = sec->target_index; |
11105 | } | |
11106 | else | |
11107 | { | |
8b127cbc | 11108 | if (flinfo->indices[symndx] == -1) |
bcacc0f5 AM |
11109 | { |
11110 | /* Otherwise output the local symbol now. */ | |
11111 | Elf_Internal_Sym sym = isymbuf[symndx]; | |
8b127cbc | 11112 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 | 11113 | const char *name; |
6e0b88f1 AM |
11114 | long indx; |
11115 | int ret; | |
bcacc0f5 AM |
11116 | |
11117 | name = bfd_elf_string_from_elf_section (input_bfd, | |
11118 | symtab_hdr->sh_link, | |
11119 | sym.st_name); | |
11120 | if (name == NULL) | |
0a1b45a2 | 11121 | return false; |
bcacc0f5 AM |
11122 | |
11123 | sym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
11124 | sec); | |
11125 | if (sym.st_shndx == SHN_BAD) | |
0a1b45a2 | 11126 | return false; |
bcacc0f5 AM |
11127 | |
11128 | sym.st_value += o->output_offset; | |
11129 | ||
6e0b88f1 | 11130 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac L |
11131 | ret = elf_link_output_symstrtab (flinfo, name, &sym, o, |
11132 | NULL); | |
6e0b88f1 | 11133 | if (ret == 0) |
0a1b45a2 | 11134 | return false; |
6e0b88f1 | 11135 | else if (ret == 1) |
8b127cbc | 11136 | flinfo->indices[symndx] = indx; |
6e0b88f1 AM |
11137 | else |
11138 | abort (); | |
bcacc0f5 AM |
11139 | } |
11140 | elf_section_data (osec)->this_hdr.sh_info | |
8b127cbc | 11141 | = flinfo->indices[symndx]; |
bcacc0f5 AM |
11142 | } |
11143 | } | |
11144 | ||
c152c796 | 11145 | if ((o->flags & SEC_HAS_CONTENTS) == 0 |
eea6121a | 11146 | || (o->size == 0 && (o->flags & SEC_RELOC) == 0)) |
c152c796 AM |
11147 | continue; |
11148 | ||
11149 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
11150 | { | |
11151 | /* Section was created by _bfd_elf_link_create_dynamic_sections | |
11152 | or somesuch. */ | |
11153 | continue; | |
11154 | } | |
11155 | ||
11156 | /* Get the contents of the section. They have been cached by a | |
11157 | relaxation routine. Note that o is a section in an input | |
11158 | file, so the contents field will not have been set by any of | |
11159 | the routines which work on output files. */ | |
11160 | if (elf_section_data (o)->this_hdr.contents != NULL) | |
53291d1f AM |
11161 | { |
11162 | contents = elf_section_data (o)->this_hdr.contents; | |
11163 | if (bed->caches_rawsize | |
11164 | && o->rawsize != 0 | |
11165 | && o->rawsize < o->size) | |
11166 | { | |
11167 | memcpy (flinfo->contents, contents, o->rawsize); | |
11168 | contents = flinfo->contents; | |
11169 | } | |
11170 | } | |
c152c796 AM |
11171 | else |
11172 | { | |
8b127cbc | 11173 | contents = flinfo->contents; |
4a114e3e | 11174 | if (! bfd_get_full_section_contents (input_bfd, o, &contents)) |
0a1b45a2 | 11175 | return false; |
c152c796 AM |
11176 | } |
11177 | ||
11178 | if ((o->flags & SEC_RELOC) != 0) | |
11179 | { | |
11180 | Elf_Internal_Rela *internal_relocs; | |
0f02bbd9 | 11181 | Elf_Internal_Rela *rel, *relend; |
0f02bbd9 | 11182 | int action_discarded; |
ece5ef60 | 11183 | int ret; |
c152c796 AM |
11184 | |
11185 | /* Get the swapped relocs. */ | |
11186 | internal_relocs | |
8b127cbc | 11187 | = _bfd_elf_link_read_relocs (input_bfd, o, flinfo->external_relocs, |
0a1b45a2 | 11188 | flinfo->internal_relocs, false); |
c152c796 AM |
11189 | if (internal_relocs == NULL |
11190 | && o->reloc_count > 0) | |
0a1b45a2 | 11191 | return false; |
c152c796 | 11192 | |
310fd250 L |
11193 | /* We need to reverse-copy input .ctors/.dtors sections if |
11194 | they are placed in .init_array/.finit_array for output. */ | |
11195 | if (o->size > address_size | |
3f3328b8 | 11196 | && ((startswith (o->name, ".ctors") |
310fd250 L |
11197 | && strcmp (o->output_section->name, |
11198 | ".init_array") == 0) | |
3f3328b8 | 11199 | || (startswith (o->name, ".dtors") |
310fd250 L |
11200 | && strcmp (o->output_section->name, |
11201 | ".fini_array") == 0)) | |
11202 | && (o->name[6] == 0 || o->name[6] == '.')) | |
c152c796 | 11203 | { |
056bafd4 MR |
11204 | if (o->size * bed->s->int_rels_per_ext_rel |
11205 | != o->reloc_count * address_size) | |
310fd250 | 11206 | { |
4eca0228 | 11207 | _bfd_error_handler |
695344c0 | 11208 | /* xgettext:c-format */ |
871b3ab2 | 11209 | (_("error: %pB: size of section %pA is not " |
310fd250 L |
11210 | "multiple of address size"), |
11211 | input_bfd, o); | |
8c6716e5 | 11212 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 11213 | return false; |
310fd250 L |
11214 | } |
11215 | o->flags |= SEC_ELF_REVERSE_COPY; | |
c152c796 AM |
11216 | } |
11217 | ||
0f02bbd9 | 11218 | action_discarded = -1; |
c152c796 | 11219 | if (!elf_section_ignore_discarded_relocs (o)) |
0f02bbd9 AM |
11220 | action_discarded = (*bed->action_discarded) (o); |
11221 | ||
11222 | /* Run through the relocs evaluating complex reloc symbols and | |
11223 | looking for relocs against symbols from discarded sections | |
11224 | or section symbols from removed link-once sections. | |
11225 | Complain about relocs against discarded sections. Zero | |
11226 | relocs against removed link-once sections. */ | |
11227 | ||
11228 | rel = internal_relocs; | |
056bafd4 | 11229 | relend = rel + o->reloc_count; |
0f02bbd9 | 11230 | for ( ; rel < relend; rel++) |
c152c796 | 11231 | { |
0f02bbd9 AM |
11232 | unsigned long r_symndx = rel->r_info >> r_sym_shift; |
11233 | unsigned int s_type; | |
11234 | asection **ps, *sec; | |
11235 | struct elf_link_hash_entry *h = NULL; | |
11236 | const char *sym_name; | |
c152c796 | 11237 | |
0f02bbd9 AM |
11238 | if (r_symndx == STN_UNDEF) |
11239 | continue; | |
c152c796 | 11240 | |
0f02bbd9 AM |
11241 | if (r_symndx >= locsymcount |
11242 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 11243 | && flinfo->sections[r_symndx] == NULL)) |
0f02bbd9 AM |
11244 | { |
11245 | h = sym_hashes[r_symndx - extsymoff]; | |
ee75fd95 | 11246 | |
0f02bbd9 AM |
11247 | /* Badly formatted input files can contain relocs that |
11248 | reference non-existant symbols. Check here so that | |
11249 | we do not seg fault. */ | |
11250 | if (h == NULL) | |
c152c796 | 11251 | { |
4eca0228 | 11252 | _bfd_error_handler |
695344c0 | 11253 | /* xgettext:c-format */ |
2dcf00ce | 11254 | (_("error: %pB contains a reloc (%#" PRIx64 ") for section %pA " |
0f02bbd9 | 11255 | "that references a non-existent global symbol"), |
2dcf00ce | 11256 | input_bfd, (uint64_t) rel->r_info, o); |
0f02bbd9 | 11257 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 11258 | return false; |
0f02bbd9 | 11259 | } |
3b36f7e6 | 11260 | |
0f02bbd9 AM |
11261 | while (h->root.type == bfd_link_hash_indirect |
11262 | || h->root.type == bfd_link_hash_warning) | |
11263 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c152c796 | 11264 | |
0f02bbd9 | 11265 | s_type = h->type; |
cdd3575c | 11266 | |
9e2dec47 | 11267 | /* If a plugin symbol is referenced from a non-IR file, |
ca4be51c AM |
11268 | mark the symbol as undefined. Note that the |
11269 | linker may attach linker created dynamic sections | |
11270 | to the plugin bfd. Symbols defined in linker | |
11271 | created sections are not plugin symbols. */ | |
bc4e12de | 11272 | if ((h->root.non_ir_ref_regular |
4070765b | 11273 | || h->root.non_ir_ref_dynamic) |
9e2dec47 L |
11274 | && (h->root.type == bfd_link_hash_defined |
11275 | || h->root.type == bfd_link_hash_defweak) | |
11276 | && (h->root.u.def.section->flags | |
11277 | & SEC_LINKER_CREATED) == 0 | |
11278 | && h->root.u.def.section->owner != NULL | |
11279 | && (h->root.u.def.section->owner->flags | |
11280 | & BFD_PLUGIN) != 0) | |
11281 | { | |
11282 | h->root.type = bfd_link_hash_undefined; | |
11283 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
11284 | } | |
11285 | ||
0f02bbd9 AM |
11286 | ps = NULL; |
11287 | if (h->root.type == bfd_link_hash_defined | |
11288 | || h->root.type == bfd_link_hash_defweak) | |
11289 | ps = &h->root.u.def.section; | |
11290 | ||
11291 | sym_name = h->root.root.string; | |
11292 | } | |
11293 | else | |
11294 | { | |
11295 | Elf_Internal_Sym *sym = isymbuf + r_symndx; | |
11296 | ||
11297 | s_type = ELF_ST_TYPE (sym->st_info); | |
8b127cbc | 11298 | ps = &flinfo->sections[r_symndx]; |
0f02bbd9 AM |
11299 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, |
11300 | sym, *ps); | |
11301 | } | |
c152c796 | 11302 | |
c301e700 | 11303 | if ((s_type == STT_RELC || s_type == STT_SRELC) |
0e1862bb | 11304 | && !bfd_link_relocatable (flinfo->info)) |
0f02bbd9 AM |
11305 | { |
11306 | bfd_vma val; | |
11307 | bfd_vma dot = (rel->r_offset | |
11308 | + o->output_offset + o->output_section->vma); | |
11309 | #ifdef DEBUG | |
11310 | printf ("Encountered a complex symbol!"); | |
11311 | printf (" (input_bfd %s, section %s, reloc %ld\n", | |
765cf5f6 | 11312 | bfd_get_filename (input_bfd), o->name, |
9ccb8af9 | 11313 | (long) (rel - internal_relocs)); |
0f02bbd9 AM |
11314 | printf (" symbol: idx %8.8lx, name %s\n", |
11315 | r_symndx, sym_name); | |
11316 | printf (" reloc : info %8.8lx, addr %8.8lx\n", | |
11317 | (unsigned long) rel->r_info, | |
11318 | (unsigned long) rel->r_offset); | |
11319 | #endif | |
8b127cbc | 11320 | if (!eval_symbol (&val, &sym_name, input_bfd, flinfo, dot, |
0f02bbd9 | 11321 | isymbuf, locsymcount, s_type == STT_SRELC)) |
0a1b45a2 | 11322 | return false; |
0f02bbd9 AM |
11323 | |
11324 | /* Symbol evaluated OK. Update to absolute value. */ | |
11325 | set_symbol_value (input_bfd, isymbuf, locsymcount, | |
11326 | r_symndx, val); | |
11327 | continue; | |
11328 | } | |
11329 | ||
11330 | if (action_discarded != -1 && ps != NULL) | |
11331 | { | |
cdd3575c AM |
11332 | /* Complain if the definition comes from a |
11333 | discarded section. */ | |
dbaa2011 | 11334 | if ((sec = *ps) != NULL && discarded_section (sec)) |
cdd3575c | 11335 | { |
cf35638d | 11336 | BFD_ASSERT (r_symndx != STN_UNDEF); |
0f02bbd9 | 11337 | if (action_discarded & COMPLAIN) |
8b127cbc | 11338 | (*flinfo->info->callbacks->einfo) |
695344c0 | 11339 | /* xgettext:c-format */ |
871b3ab2 AM |
11340 | (_("%X`%s' referenced in section `%pA' of %pB: " |
11341 | "defined in discarded section `%pA' of %pB\n"), | |
e1fffbe6 | 11342 | sym_name, o, input_bfd, sec, sec->owner); |
cdd3575c | 11343 | |
87e5235d | 11344 | /* Try to do the best we can to support buggy old |
e0ae6d6f | 11345 | versions of gcc. Pretend that the symbol is |
87e5235d AM |
11346 | really defined in the kept linkonce section. |
11347 | FIXME: This is quite broken. Modifying the | |
11348 | symbol here means we will be changing all later | |
e0ae6d6f | 11349 | uses of the symbol, not just in this section. */ |
0f02bbd9 | 11350 | if (action_discarded & PRETEND) |
87e5235d | 11351 | { |
01b3c8ab L |
11352 | asection *kept; |
11353 | ||
c0f00686 | 11354 | kept = _bfd_elf_check_kept_section (sec, |
8b127cbc | 11355 | flinfo->info); |
01b3c8ab | 11356 | if (kept != NULL) |
87e5235d AM |
11357 | { |
11358 | *ps = kept; | |
11359 | continue; | |
11360 | } | |
11361 | } | |
c152c796 AM |
11362 | } |
11363 | } | |
11364 | } | |
11365 | ||
11366 | /* Relocate the section by invoking a back end routine. | |
11367 | ||
11368 | The back end routine is responsible for adjusting the | |
11369 | section contents as necessary, and (if using Rela relocs | |
11370 | and generating a relocatable output file) adjusting the | |
11371 | reloc addend as necessary. | |
11372 | ||
11373 | The back end routine does not have to worry about setting | |
11374 | the reloc address or the reloc symbol index. | |
11375 | ||
11376 | The back end routine is given a pointer to the swapped in | |
11377 | internal symbols, and can access the hash table entries | |
11378 | for the external symbols via elf_sym_hashes (input_bfd). | |
11379 | ||
11380 | When generating relocatable output, the back end routine | |
11381 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
11382 | output symbol is going to be a section symbol | |
11383 | corresponding to the output section, which will require | |
11384 | the addend to be adjusted. */ | |
11385 | ||
8b127cbc | 11386 | ret = (*relocate_section) (output_bfd, flinfo->info, |
c152c796 AM |
11387 | input_bfd, o, contents, |
11388 | internal_relocs, | |
11389 | isymbuf, | |
8b127cbc | 11390 | flinfo->sections); |
ece5ef60 | 11391 | if (!ret) |
0a1b45a2 | 11392 | return false; |
c152c796 | 11393 | |
ece5ef60 | 11394 | if (ret == 2 |
0e1862bb | 11395 | || bfd_link_relocatable (flinfo->info) |
8b127cbc | 11396 | || flinfo->info->emitrelocations) |
c152c796 AM |
11397 | { |
11398 | Elf_Internal_Rela *irela; | |
d4730f92 | 11399 | Elf_Internal_Rela *irelaend, *irelamid; |
c152c796 AM |
11400 | bfd_vma last_offset; |
11401 | struct elf_link_hash_entry **rel_hash; | |
d4730f92 BS |
11402 | struct elf_link_hash_entry **rel_hash_list, **rela_hash_list; |
11403 | Elf_Internal_Shdr *input_rel_hdr, *input_rela_hdr; | |
c152c796 | 11404 | unsigned int next_erel; |
0a1b45a2 | 11405 | bool rela_normal; |
d4730f92 | 11406 | struct bfd_elf_section_data *esdi, *esdo; |
c152c796 | 11407 | |
d4730f92 BS |
11408 | esdi = elf_section_data (o); |
11409 | esdo = elf_section_data (o->output_section); | |
0a1b45a2 | 11410 | rela_normal = false; |
c152c796 AM |
11411 | |
11412 | /* Adjust the reloc addresses and symbol indices. */ | |
11413 | ||
11414 | irela = internal_relocs; | |
056bafd4 | 11415 | irelaend = irela + o->reloc_count; |
d4730f92 BS |
11416 | rel_hash = esdo->rel.hashes + esdo->rel.count; |
11417 | /* We start processing the REL relocs, if any. When we reach | |
11418 | IRELAMID in the loop, we switch to the RELA relocs. */ | |
11419 | irelamid = irela; | |
11420 | if (esdi->rel.hdr != NULL) | |
11421 | irelamid += (NUM_SHDR_ENTRIES (esdi->rel.hdr) | |
11422 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 11423 | rel_hash_list = rel_hash; |
d4730f92 | 11424 | rela_hash_list = NULL; |
c152c796 | 11425 | last_offset = o->output_offset; |
0e1862bb | 11426 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
11427 | last_offset += o->output_section->vma; |
11428 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) | |
11429 | { | |
11430 | unsigned long r_symndx; | |
11431 | asection *sec; | |
11432 | Elf_Internal_Sym sym; | |
11433 | ||
11434 | if (next_erel == bed->s->int_rels_per_ext_rel) | |
11435 | { | |
11436 | rel_hash++; | |
11437 | next_erel = 0; | |
11438 | } | |
11439 | ||
d4730f92 BS |
11440 | if (irela == irelamid) |
11441 | { | |
11442 | rel_hash = esdo->rela.hashes + esdo->rela.count; | |
11443 | rela_hash_list = rel_hash; | |
11444 | rela_normal = bed->rela_normal; | |
11445 | } | |
11446 | ||
c152c796 | 11447 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
8b127cbc | 11448 | flinfo->info, o, |
c152c796 AM |
11449 | irela->r_offset); |
11450 | if (irela->r_offset >= (bfd_vma) -2) | |
11451 | { | |
11452 | /* This is a reloc for a deleted entry or somesuch. | |
11453 | Turn it into an R_*_NONE reloc, at the same | |
11454 | offset as the last reloc. elf_eh_frame.c and | |
e460dd0d | 11455 | bfd_elf_discard_info rely on reloc offsets |
c152c796 AM |
11456 | being ordered. */ |
11457 | irela->r_offset = last_offset; | |
11458 | irela->r_info = 0; | |
11459 | irela->r_addend = 0; | |
11460 | continue; | |
11461 | } | |
11462 | ||
11463 | irela->r_offset += o->output_offset; | |
11464 | ||
11465 | /* Relocs in an executable have to be virtual addresses. */ | |
0e1862bb | 11466 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
11467 | irela->r_offset += o->output_section->vma; |
11468 | ||
11469 | last_offset = irela->r_offset; | |
11470 | ||
11471 | r_symndx = irela->r_info >> r_sym_shift; | |
11472 | if (r_symndx == STN_UNDEF) | |
11473 | continue; | |
11474 | ||
11475 | if (r_symndx >= locsymcount | |
11476 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 11477 | && flinfo->sections[r_symndx] == NULL)) |
c152c796 AM |
11478 | { |
11479 | struct elf_link_hash_entry *rh; | |
11480 | unsigned long indx; | |
11481 | ||
11482 | /* This is a reloc against a global symbol. We | |
11483 | have not yet output all the local symbols, so | |
11484 | we do not know the symbol index of any global | |
11485 | symbol. We set the rel_hash entry for this | |
11486 | reloc to point to the global hash table entry | |
11487 | for this symbol. The symbol index is then | |
ee75fd95 | 11488 | set at the end of bfd_elf_final_link. */ |
c152c796 AM |
11489 | indx = r_symndx - extsymoff; |
11490 | rh = elf_sym_hashes (input_bfd)[indx]; | |
11491 | while (rh->root.type == bfd_link_hash_indirect | |
11492 | || rh->root.type == bfd_link_hash_warning) | |
11493 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
11494 | ||
11495 | /* Setting the index to -2 tells | |
11496 | elf_link_output_extsym that this symbol is | |
11497 | used by a reloc. */ | |
11498 | BFD_ASSERT (rh->indx < 0); | |
11499 | rh->indx = -2; | |
c152c796 AM |
11500 | *rel_hash = rh; |
11501 | ||
11502 | continue; | |
11503 | } | |
11504 | ||
11505 | /* This is a reloc against a local symbol. */ | |
11506 | ||
11507 | *rel_hash = NULL; | |
11508 | sym = isymbuf[r_symndx]; | |
8b127cbc | 11509 | sec = flinfo->sections[r_symndx]; |
c152c796 AM |
11510 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
11511 | { | |
11512 | /* I suppose the backend ought to fill in the | |
11513 | section of any STT_SECTION symbol against a | |
6a8d1586 | 11514 | processor specific section. */ |
cf35638d | 11515 | r_symndx = STN_UNDEF; |
6a8d1586 AM |
11516 | if (bfd_is_abs_section (sec)) |
11517 | ; | |
c152c796 AM |
11518 | else if (sec == NULL || sec->owner == NULL) |
11519 | { | |
11520 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 11521 | return false; |
c152c796 AM |
11522 | } |
11523 | else | |
11524 | { | |
6a8d1586 AM |
11525 | asection *osec = sec->output_section; |
11526 | ||
11527 | /* If we have discarded a section, the output | |
11528 | section will be the absolute section. In | |
ab96bf03 AM |
11529 | case of discarded SEC_MERGE sections, use |
11530 | the kept section. relocate_section should | |
11531 | have already handled discarded linkonce | |
11532 | sections. */ | |
6a8d1586 AM |
11533 | if (bfd_is_abs_section (osec) |
11534 | && sec->kept_section != NULL | |
11535 | && sec->kept_section->output_section != NULL) | |
11536 | { | |
11537 | osec = sec->kept_section->output_section; | |
11538 | irela->r_addend -= osec->vma; | |
11539 | } | |
11540 | ||
11541 | if (!bfd_is_abs_section (osec)) | |
11542 | { | |
11543 | r_symndx = osec->target_index; | |
cf35638d | 11544 | if (r_symndx == STN_UNDEF) |
74541ad4 | 11545 | { |
051d833a AM |
11546 | irela->r_addend += osec->vma; |
11547 | osec = _bfd_nearby_section (output_bfd, osec, | |
11548 | osec->vma); | |
11549 | irela->r_addend -= osec->vma; | |
11550 | r_symndx = osec->target_index; | |
74541ad4 | 11551 | } |
6a8d1586 | 11552 | } |
c152c796 AM |
11553 | } |
11554 | ||
11555 | /* Adjust the addend according to where the | |
11556 | section winds up in the output section. */ | |
11557 | if (rela_normal) | |
11558 | irela->r_addend += sec->output_offset; | |
11559 | } | |
11560 | else | |
11561 | { | |
8b127cbc | 11562 | if (flinfo->indices[r_symndx] == -1) |
c152c796 AM |
11563 | { |
11564 | unsigned long shlink; | |
11565 | const char *name; | |
11566 | asection *osec; | |
6e0b88f1 | 11567 | long indx; |
c152c796 | 11568 | |
8b127cbc | 11569 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
11570 | { |
11571 | /* You can't do ld -r -s. */ | |
11572 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 11573 | return false; |
c152c796 AM |
11574 | } |
11575 | ||
11576 | /* This symbol was skipped earlier, but | |
11577 | since it is needed by a reloc, we | |
11578 | must output it now. */ | |
11579 | shlink = symtab_hdr->sh_link; | |
11580 | name = (bfd_elf_string_from_elf_section | |
11581 | (input_bfd, shlink, sym.st_name)); | |
11582 | if (name == NULL) | |
0a1b45a2 | 11583 | return false; |
c152c796 AM |
11584 | |
11585 | osec = sec->output_section; | |
11586 | sym.st_shndx = | |
11587 | _bfd_elf_section_from_bfd_section (output_bfd, | |
11588 | osec); | |
11589 | if (sym.st_shndx == SHN_BAD) | |
0a1b45a2 | 11590 | return false; |
c152c796 AM |
11591 | |
11592 | sym.st_value += sec->output_offset; | |
0e1862bb | 11593 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
11594 | { |
11595 | sym.st_value += osec->vma; | |
11596 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
11597 | { | |
102def4d AM |
11598 | struct elf_link_hash_table *htab |
11599 | = elf_hash_table (flinfo->info); | |
11600 | ||
c152c796 AM |
11601 | /* STT_TLS symbols are relative to PT_TLS |
11602 | segment base. */ | |
102def4d AM |
11603 | if (htab->tls_sec != NULL) |
11604 | sym.st_value -= htab->tls_sec->vma; | |
11605 | else | |
11606 | sym.st_info | |
11607 | = ELF_ST_INFO (ELF_ST_BIND (sym.st_info), | |
11608 | STT_NOTYPE); | |
c152c796 AM |
11609 | } |
11610 | } | |
11611 | ||
6e0b88f1 | 11612 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac L |
11613 | ret = elf_link_output_symstrtab (flinfo, name, |
11614 | &sym, sec, | |
11615 | NULL); | |
6e0b88f1 | 11616 | if (ret == 0) |
0a1b45a2 | 11617 | return false; |
6e0b88f1 | 11618 | else if (ret == 1) |
8b127cbc | 11619 | flinfo->indices[r_symndx] = indx; |
6e0b88f1 AM |
11620 | else |
11621 | abort (); | |
c152c796 AM |
11622 | } |
11623 | ||
8b127cbc | 11624 | r_symndx = flinfo->indices[r_symndx]; |
c152c796 AM |
11625 | } |
11626 | ||
11627 | irela->r_info = ((bfd_vma) r_symndx << r_sym_shift | |
11628 | | (irela->r_info & r_type_mask)); | |
11629 | } | |
11630 | ||
11631 | /* Swap out the relocs. */ | |
d4730f92 BS |
11632 | input_rel_hdr = esdi->rel.hdr; |
11633 | if (input_rel_hdr && input_rel_hdr->sh_size != 0) | |
c152c796 | 11634 | { |
d4730f92 BS |
11635 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
11636 | input_rel_hdr, | |
11637 | internal_relocs, | |
11638 | rel_hash_list)) | |
0a1b45a2 | 11639 | return false; |
c152c796 AM |
11640 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) |
11641 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 11642 | rel_hash_list += NUM_SHDR_ENTRIES (input_rel_hdr); |
d4730f92 BS |
11643 | } |
11644 | ||
11645 | input_rela_hdr = esdi->rela.hdr; | |
11646 | if (input_rela_hdr && input_rela_hdr->sh_size != 0) | |
11647 | { | |
eac338cf | 11648 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
d4730f92 | 11649 | input_rela_hdr, |
eac338cf | 11650 | internal_relocs, |
d4730f92 | 11651 | rela_hash_list)) |
0a1b45a2 | 11652 | return false; |
c152c796 AM |
11653 | } |
11654 | } | |
11655 | } | |
11656 | ||
11657 | /* Write out the modified section contents. */ | |
11658 | if (bed->elf_backend_write_section | |
8b127cbc | 11659 | && (*bed->elf_backend_write_section) (output_bfd, flinfo->info, o, |
c7b8f16e | 11660 | contents)) |
c152c796 AM |
11661 | { |
11662 | /* Section written out. */ | |
11663 | } | |
11664 | else switch (o->sec_info_type) | |
11665 | { | |
dbaa2011 | 11666 | case SEC_INFO_TYPE_STABS: |
c152c796 AM |
11667 | if (! (_bfd_write_section_stabs |
11668 | (output_bfd, | |
8b127cbc | 11669 | &elf_hash_table (flinfo->info)->stab_info, |
c152c796 | 11670 | o, &elf_section_data (o)->sec_info, contents))) |
0a1b45a2 | 11671 | return false; |
c152c796 | 11672 | break; |
dbaa2011 | 11673 | case SEC_INFO_TYPE_MERGE: |
c152c796 AM |
11674 | if (! _bfd_write_merged_section (output_bfd, o, |
11675 | elf_section_data (o)->sec_info)) | |
0a1b45a2 | 11676 | return false; |
c152c796 | 11677 | break; |
dbaa2011 | 11678 | case SEC_INFO_TYPE_EH_FRAME: |
c152c796 | 11679 | { |
8b127cbc | 11680 | if (! _bfd_elf_write_section_eh_frame (output_bfd, flinfo->info, |
c152c796 | 11681 | o, contents)) |
0a1b45a2 | 11682 | return false; |
c152c796 AM |
11683 | } |
11684 | break; | |
2f0c68f2 CM |
11685 | case SEC_INFO_TYPE_EH_FRAME_ENTRY: |
11686 | { | |
11687 | if (! _bfd_elf_write_section_eh_frame_entry (output_bfd, | |
11688 | flinfo->info, | |
11689 | o, contents)) | |
0a1b45a2 | 11690 | return false; |
2f0c68f2 CM |
11691 | } |
11692 | break; | |
c152c796 AM |
11693 | default: |
11694 | { | |
310fd250 L |
11695 | if (! (o->flags & SEC_EXCLUDE)) |
11696 | { | |
11697 | file_ptr offset = (file_ptr) o->output_offset; | |
11698 | bfd_size_type todo = o->size; | |
37b01f6a | 11699 | |
bb294208 | 11700 | offset *= bfd_octets_per_byte (output_bfd, o); |
37b01f6a | 11701 | |
310fd250 L |
11702 | if ((o->flags & SEC_ELF_REVERSE_COPY)) |
11703 | { | |
11704 | /* Reverse-copy input section to output. */ | |
11705 | do | |
11706 | { | |
11707 | todo -= address_size; | |
11708 | if (! bfd_set_section_contents (output_bfd, | |
11709 | o->output_section, | |
11710 | contents + todo, | |
11711 | offset, | |
11712 | address_size)) | |
0a1b45a2 | 11713 | return false; |
310fd250 L |
11714 | if (todo == 0) |
11715 | break; | |
11716 | offset += address_size; | |
11717 | } | |
11718 | while (1); | |
11719 | } | |
11720 | else if (! bfd_set_section_contents (output_bfd, | |
11721 | o->output_section, | |
11722 | contents, | |
11723 | offset, todo)) | |
0a1b45a2 | 11724 | return false; |
310fd250 | 11725 | } |
c152c796 AM |
11726 | } |
11727 | break; | |
11728 | } | |
11729 | } | |
11730 | ||
0a1b45a2 | 11731 | return true; |
c152c796 AM |
11732 | } |
11733 | ||
11734 | /* Generate a reloc when linking an ELF file. This is a reloc | |
3a800eb9 | 11735 | requested by the linker, and does not come from any input file. This |
c152c796 AM |
11736 | is used to build constructor and destructor tables when linking |
11737 | with -Ur. */ | |
11738 | ||
0a1b45a2 | 11739 | static bool |
c152c796 AM |
11740 | elf_reloc_link_order (bfd *output_bfd, |
11741 | struct bfd_link_info *info, | |
11742 | asection *output_section, | |
11743 | struct bfd_link_order *link_order) | |
11744 | { | |
11745 | reloc_howto_type *howto; | |
11746 | long indx; | |
11747 | bfd_vma offset; | |
11748 | bfd_vma addend; | |
d4730f92 | 11749 | struct bfd_elf_section_reloc_data *reldata; |
c152c796 AM |
11750 | struct elf_link_hash_entry **rel_hash_ptr; |
11751 | Elf_Internal_Shdr *rel_hdr; | |
11752 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
11753 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; | |
11754 | bfd_byte *erel; | |
11755 | unsigned int i; | |
d4730f92 | 11756 | struct bfd_elf_section_data *esdo = elf_section_data (output_section); |
c152c796 AM |
11757 | |
11758 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
11759 | if (howto == NULL) | |
11760 | { | |
11761 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 11762 | return false; |
c152c796 AM |
11763 | } |
11764 | ||
11765 | addend = link_order->u.reloc.p->addend; | |
11766 | ||
d4730f92 BS |
11767 | if (esdo->rel.hdr) |
11768 | reldata = &esdo->rel; | |
11769 | else if (esdo->rela.hdr) | |
11770 | reldata = &esdo->rela; | |
11771 | else | |
11772 | { | |
11773 | reldata = NULL; | |
11774 | BFD_ASSERT (0); | |
11775 | } | |
11776 | ||
c152c796 | 11777 | /* Figure out the symbol index. */ |
d4730f92 | 11778 | rel_hash_ptr = reldata->hashes + reldata->count; |
c152c796 AM |
11779 | if (link_order->type == bfd_section_reloc_link_order) |
11780 | { | |
11781 | indx = link_order->u.reloc.p->u.section->target_index; | |
11782 | BFD_ASSERT (indx != 0); | |
11783 | *rel_hash_ptr = NULL; | |
11784 | } | |
11785 | else | |
11786 | { | |
11787 | struct elf_link_hash_entry *h; | |
11788 | ||
11789 | /* Treat a reloc against a defined symbol as though it were | |
11790 | actually against the section. */ | |
11791 | h = ((struct elf_link_hash_entry *) | |
11792 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
11793 | link_order->u.reloc.p->u.name, | |
0a1b45a2 | 11794 | false, false, true)); |
c152c796 AM |
11795 | if (h != NULL |
11796 | && (h->root.type == bfd_link_hash_defined | |
11797 | || h->root.type == bfd_link_hash_defweak)) | |
11798 | { | |
11799 | asection *section; | |
11800 | ||
11801 | section = h->root.u.def.section; | |
11802 | indx = section->output_section->target_index; | |
11803 | *rel_hash_ptr = NULL; | |
11804 | /* It seems that we ought to add the symbol value to the | |
11805 | addend here, but in practice it has already been added | |
11806 | because it was passed to constructor_callback. */ | |
11807 | addend += section->output_section->vma + section->output_offset; | |
11808 | } | |
11809 | else if (h != NULL) | |
11810 | { | |
11811 | /* Setting the index to -2 tells elf_link_output_extsym that | |
11812 | this symbol is used by a reloc. */ | |
11813 | h->indx = -2; | |
11814 | *rel_hash_ptr = h; | |
11815 | indx = 0; | |
11816 | } | |
11817 | else | |
11818 | { | |
1a72702b AM |
11819 | (*info->callbacks->unattached_reloc) |
11820 | (info, link_order->u.reloc.p->u.name, NULL, NULL, 0); | |
c152c796 AM |
11821 | indx = 0; |
11822 | } | |
11823 | } | |
11824 | ||
11825 | /* If this is an inplace reloc, we must write the addend into the | |
11826 | object file. */ | |
11827 | if (howto->partial_inplace && addend != 0) | |
11828 | { | |
11829 | bfd_size_type size; | |
11830 | bfd_reloc_status_type rstat; | |
11831 | bfd_byte *buf; | |
0a1b45a2 | 11832 | bool ok; |
c152c796 | 11833 | const char *sym_name; |
bb294208 | 11834 | bfd_size_type octets; |
c152c796 | 11835 | |
a50b1753 NC |
11836 | size = (bfd_size_type) bfd_get_reloc_size (howto); |
11837 | buf = (bfd_byte *) bfd_zmalloc (size); | |
6346d5ca | 11838 | if (buf == NULL && size != 0) |
0a1b45a2 | 11839 | return false; |
c152c796 AM |
11840 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); |
11841 | switch (rstat) | |
11842 | { | |
11843 | case bfd_reloc_ok: | |
11844 | break; | |
11845 | ||
11846 | default: | |
11847 | case bfd_reloc_outofrange: | |
11848 | abort (); | |
11849 | ||
11850 | case bfd_reloc_overflow: | |
11851 | if (link_order->type == bfd_section_reloc_link_order) | |
fd361982 | 11852 | sym_name = bfd_section_name (link_order->u.reloc.p->u.section); |
c152c796 AM |
11853 | else |
11854 | sym_name = link_order->u.reloc.p->u.name; | |
1a72702b AM |
11855 | (*info->callbacks->reloc_overflow) (info, NULL, sym_name, |
11856 | howto->name, addend, NULL, NULL, | |
11857 | (bfd_vma) 0); | |
c152c796 AM |
11858 | break; |
11859 | } | |
37b01f6a | 11860 | |
bb294208 AM |
11861 | octets = link_order->offset * bfd_octets_per_byte (output_bfd, |
11862 | output_section); | |
c152c796 | 11863 | ok = bfd_set_section_contents (output_bfd, output_section, buf, |
bb294208 | 11864 | octets, size); |
c152c796 AM |
11865 | free (buf); |
11866 | if (! ok) | |
0a1b45a2 | 11867 | return false; |
c152c796 AM |
11868 | } |
11869 | ||
11870 | /* The address of a reloc is relative to the section in a | |
11871 | relocatable file, and is a virtual address in an executable | |
11872 | file. */ | |
11873 | offset = link_order->offset; | |
0e1862bb | 11874 | if (! bfd_link_relocatable (info)) |
c152c796 AM |
11875 | offset += output_section->vma; |
11876 | ||
11877 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) | |
11878 | { | |
11879 | irel[i].r_offset = offset; | |
11880 | irel[i].r_info = 0; | |
11881 | irel[i].r_addend = 0; | |
11882 | } | |
11883 | if (bed->s->arch_size == 32) | |
11884 | irel[0].r_info = ELF32_R_INFO (indx, howto->type); | |
11885 | else | |
11886 | irel[0].r_info = ELF64_R_INFO (indx, howto->type); | |
11887 | ||
d4730f92 | 11888 | rel_hdr = reldata->hdr; |
c152c796 AM |
11889 | erel = rel_hdr->contents; |
11890 | if (rel_hdr->sh_type == SHT_REL) | |
11891 | { | |
d4730f92 | 11892 | erel += reldata->count * bed->s->sizeof_rel; |
c152c796 AM |
11893 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); |
11894 | } | |
11895 | else | |
11896 | { | |
11897 | irel[0].r_addend = addend; | |
d4730f92 | 11898 | erel += reldata->count * bed->s->sizeof_rela; |
c152c796 AM |
11899 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); |
11900 | } | |
11901 | ||
d4730f92 | 11902 | ++reldata->count; |
c152c796 | 11903 | |
0a1b45a2 | 11904 | return true; |
c152c796 AM |
11905 | } |
11906 | ||
76359541 TP |
11907 | /* Generate an import library in INFO->implib_bfd from symbols in ABFD. |
11908 | Returns TRUE upon success, FALSE otherwise. */ | |
11909 | ||
0a1b45a2 | 11910 | static bool |
76359541 TP |
11911 | elf_output_implib (bfd *abfd, struct bfd_link_info *info) |
11912 | { | |
0a1b45a2 | 11913 | bool ret = false; |
76359541 TP |
11914 | bfd *implib_bfd; |
11915 | const struct elf_backend_data *bed; | |
11916 | flagword flags; | |
11917 | enum bfd_architecture arch; | |
11918 | unsigned int mach; | |
11919 | asymbol **sympp = NULL; | |
11920 | long symsize; | |
11921 | long symcount; | |
11922 | long src_count; | |
11923 | elf_symbol_type *osymbuf; | |
446f7ed5 | 11924 | size_t amt; |
76359541 TP |
11925 | |
11926 | implib_bfd = info->out_implib_bfd; | |
11927 | bed = get_elf_backend_data (abfd); | |
11928 | ||
11929 | if (!bfd_set_format (implib_bfd, bfd_object)) | |
0a1b45a2 | 11930 | return false; |
76359541 | 11931 | |
046734ff | 11932 | /* Use flag from executable but make it a relocatable object. */ |
76359541 TP |
11933 | flags = bfd_get_file_flags (abfd); |
11934 | flags &= ~HAS_RELOC; | |
11935 | if (!bfd_set_start_address (implib_bfd, 0) | |
046734ff | 11936 | || !bfd_set_file_flags (implib_bfd, flags & ~EXEC_P)) |
0a1b45a2 | 11937 | return false; |
76359541 TP |
11938 | |
11939 | /* Copy architecture of output file to import library file. */ | |
11940 | arch = bfd_get_arch (abfd); | |
11941 | mach = bfd_get_mach (abfd); | |
11942 | if (!bfd_set_arch_mach (implib_bfd, arch, mach) | |
11943 | && (abfd->target_defaulted | |
11944 | || bfd_get_arch (abfd) != bfd_get_arch (implib_bfd))) | |
0a1b45a2 | 11945 | return false; |
76359541 TP |
11946 | |
11947 | /* Get symbol table size. */ | |
11948 | symsize = bfd_get_symtab_upper_bound (abfd); | |
11949 | if (symsize < 0) | |
0a1b45a2 | 11950 | return false; |
76359541 TP |
11951 | |
11952 | /* Read in the symbol table. */ | |
ec9bd0a2 AM |
11953 | sympp = (asymbol **) bfd_malloc (symsize); |
11954 | if (sympp == NULL) | |
0a1b45a2 | 11955 | return false; |
ec9bd0a2 | 11956 | |
76359541 TP |
11957 | symcount = bfd_canonicalize_symtab (abfd, sympp); |
11958 | if (symcount < 0) | |
11959 | goto free_sym_buf; | |
11960 | ||
11961 | /* Allow the BFD backend to copy any private header data it | |
11962 | understands from the output BFD to the import library BFD. */ | |
11963 | if (! bfd_copy_private_header_data (abfd, implib_bfd)) | |
11964 | goto free_sym_buf; | |
11965 | ||
11966 | /* Filter symbols to appear in the import library. */ | |
11967 | if (bed->elf_backend_filter_implib_symbols) | |
11968 | symcount = bed->elf_backend_filter_implib_symbols (abfd, info, sympp, | |
11969 | symcount); | |
11970 | else | |
11971 | symcount = _bfd_elf_filter_global_symbols (abfd, info, sympp, symcount); | |
11972 | if (symcount == 0) | |
11973 | { | |
5df1bc57 | 11974 | bfd_set_error (bfd_error_no_symbols); |
871b3ab2 | 11975 | _bfd_error_handler (_("%pB: no symbol found for import library"), |
4eca0228 | 11976 | implib_bfd); |
76359541 TP |
11977 | goto free_sym_buf; |
11978 | } | |
11979 | ||
11980 | ||
11981 | /* Make symbols absolute. */ | |
446f7ed5 AM |
11982 | amt = symcount * sizeof (*osymbuf); |
11983 | osymbuf = (elf_symbol_type *) bfd_alloc (implib_bfd, amt); | |
ec9bd0a2 AM |
11984 | if (osymbuf == NULL) |
11985 | goto free_sym_buf; | |
11986 | ||
76359541 TP |
11987 | for (src_count = 0; src_count < symcount; src_count++) |
11988 | { | |
11989 | memcpy (&osymbuf[src_count], (elf_symbol_type *) sympp[src_count], | |
11990 | sizeof (*osymbuf)); | |
11991 | osymbuf[src_count].symbol.section = bfd_abs_section_ptr; | |
11992 | osymbuf[src_count].internal_elf_sym.st_shndx = SHN_ABS; | |
11993 | osymbuf[src_count].symbol.value += sympp[src_count]->section->vma; | |
11994 | osymbuf[src_count].internal_elf_sym.st_value = | |
11995 | osymbuf[src_count].symbol.value; | |
11996 | sympp[src_count] = &osymbuf[src_count].symbol; | |
11997 | } | |
11998 | ||
11999 | bfd_set_symtab (implib_bfd, sympp, symcount); | |
12000 | ||
12001 | /* Allow the BFD backend to copy any private data it understands | |
12002 | from the output BFD to the import library BFD. This is done last | |
12003 | to permit the routine to look at the filtered symbol table. */ | |
12004 | if (! bfd_copy_private_bfd_data (abfd, implib_bfd)) | |
12005 | goto free_sym_buf; | |
12006 | ||
12007 | if (!bfd_close (implib_bfd)) | |
12008 | goto free_sym_buf; | |
12009 | ||
0a1b45a2 | 12010 | ret = true; |
76359541 | 12011 | |
dc1e8a47 | 12012 | free_sym_buf: |
76359541 TP |
12013 | free (sympp); |
12014 | return ret; | |
12015 | } | |
12016 | ||
9f7c3e5e AM |
12017 | static void |
12018 | elf_final_link_free (bfd *obfd, struct elf_final_link_info *flinfo) | |
12019 | { | |
12020 | asection *o; | |
12021 | ||
12022 | if (flinfo->symstrtab != NULL) | |
ef10c3ac | 12023 | _bfd_elf_strtab_free (flinfo->symstrtab); |
c9594989 AM |
12024 | free (flinfo->contents); |
12025 | free (flinfo->external_relocs); | |
12026 | free (flinfo->internal_relocs); | |
12027 | free (flinfo->external_syms); | |
12028 | free (flinfo->locsym_shndx); | |
12029 | free (flinfo->internal_syms); | |
12030 | free (flinfo->indices); | |
12031 | free (flinfo->sections); | |
12032 | if (flinfo->symshndxbuf != (Elf_External_Sym_Shndx *) -1) | |
9f7c3e5e AM |
12033 | free (flinfo->symshndxbuf); |
12034 | for (o = obfd->sections; o != NULL; o = o->next) | |
12035 | { | |
12036 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
c9594989 AM |
12037 | free (esdo->rel.hashes); |
12038 | free (esdo->rela.hashes); | |
9f7c3e5e AM |
12039 | } |
12040 | } | |
0b52efa6 | 12041 | |
c152c796 AM |
12042 | /* Do the final step of an ELF link. */ |
12043 | ||
0a1b45a2 | 12044 | bool |
c152c796 AM |
12045 | bfd_elf_final_link (bfd *abfd, struct bfd_link_info *info) |
12046 | { | |
0a1b45a2 AM |
12047 | bool dynamic; |
12048 | bool emit_relocs; | |
c152c796 | 12049 | bfd *dynobj; |
8b127cbc | 12050 | struct elf_final_link_info flinfo; |
91d6fa6a NC |
12051 | asection *o; |
12052 | struct bfd_link_order *p; | |
12053 | bfd *sub; | |
c152c796 AM |
12054 | bfd_size_type max_contents_size; |
12055 | bfd_size_type max_external_reloc_size; | |
12056 | bfd_size_type max_internal_reloc_count; | |
12057 | bfd_size_type max_sym_count; | |
12058 | bfd_size_type max_sym_shndx_count; | |
c152c796 AM |
12059 | Elf_Internal_Sym elfsym; |
12060 | unsigned int i; | |
12061 | Elf_Internal_Shdr *symtab_hdr; | |
12062 | Elf_Internal_Shdr *symtab_shndx_hdr; | |
c152c796 AM |
12063 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
12064 | struct elf_outext_info eoinfo; | |
0a1b45a2 | 12065 | bool merged; |
c152c796 AM |
12066 | size_t relativecount = 0; |
12067 | asection *reldyn = 0; | |
12068 | bfd_size_type amt; | |
104d59d1 JM |
12069 | asection *attr_section = NULL; |
12070 | bfd_vma attr_size = 0; | |
12071 | const char *std_attrs_section; | |
64f52338 | 12072 | struct elf_link_hash_table *htab = elf_hash_table (info); |
0a1b45a2 AM |
12073 | bool sections_removed; |
12074 | bool ret; | |
c152c796 | 12075 | |
2cc15b10 | 12076 | if (!is_elf_hash_table (&htab->root)) |
0a1b45a2 | 12077 | return false; |
c152c796 | 12078 | |
0e1862bb | 12079 | if (bfd_link_pic (info)) |
c152c796 AM |
12080 | abfd->flags |= DYNAMIC; |
12081 | ||
64f52338 AM |
12082 | dynamic = htab->dynamic_sections_created; |
12083 | dynobj = htab->dynobj; | |
c152c796 | 12084 | |
0e1862bb | 12085 | emit_relocs = (bfd_link_relocatable (info) |
a4676736 | 12086 | || info->emitrelocations); |
c152c796 | 12087 | |
496afd17 | 12088 | memset (&flinfo, 0, sizeof (flinfo)); |
8b127cbc AM |
12089 | flinfo.info = info; |
12090 | flinfo.output_bfd = abfd; | |
ef10c3ac | 12091 | flinfo.symstrtab = _bfd_elf_strtab_init (); |
8b127cbc | 12092 | if (flinfo.symstrtab == NULL) |
0a1b45a2 | 12093 | return false; |
c152c796 AM |
12094 | |
12095 | if (! dynamic) | |
12096 | { | |
8b127cbc AM |
12097 | flinfo.hash_sec = NULL; |
12098 | flinfo.symver_sec = NULL; | |
c152c796 AM |
12099 | } |
12100 | else | |
12101 | { | |
3d4d4302 | 12102 | flinfo.hash_sec = bfd_get_linker_section (dynobj, ".hash"); |
202e2356 | 12103 | /* Note that dynsym_sec can be NULL (on VMS). */ |
3d4d4302 | 12104 | flinfo.symver_sec = bfd_get_linker_section (dynobj, ".gnu.version"); |
c152c796 AM |
12105 | /* Note that it is OK if symver_sec is NULL. */ |
12106 | } | |
12107 | ||
496afd17 L |
12108 | if (info->unique_symbol |
12109 | && !bfd_hash_table_init (&flinfo.local_hash_table, | |
12110 | local_hash_newfunc, | |
12111 | sizeof (struct local_hash_entry))) | |
0a1b45a2 | 12112 | return false; |
c152c796 | 12113 | |
104d59d1 JM |
12114 | /* The object attributes have been merged. Remove the input |
12115 | sections from the link, and set the contents of the output | |
1ff6de03 | 12116 | section. */ |
0a1b45a2 | 12117 | sections_removed = false; |
104d59d1 JM |
12118 | std_attrs_section = get_elf_backend_data (abfd)->obj_attrs_section; |
12119 | for (o = abfd->sections; o != NULL; o = o->next) | |
12120 | { | |
0a1b45a2 | 12121 | bool remove_section = false; |
b8a6ced7 | 12122 | |
104d59d1 JM |
12123 | if ((std_attrs_section && strcmp (o->name, std_attrs_section) == 0) |
12124 | || strcmp (o->name, ".gnu.attributes") == 0) | |
12125 | { | |
12126 | for (p = o->map_head.link_order; p != NULL; p = p->next) | |
12127 | { | |
12128 | asection *input_section; | |
12129 | ||
12130 | if (p->type != bfd_indirect_link_order) | |
12131 | continue; | |
12132 | input_section = p->u.indirect.section; | |
12133 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
12134 | elf_link_input_bfd ignores this section. */ | |
12135 | input_section->flags &= ~SEC_HAS_CONTENTS; | |
12136 | } | |
a0c8462f | 12137 | |
104d59d1 | 12138 | attr_size = bfd_elf_obj_attr_size (abfd); |
fd361982 | 12139 | bfd_set_section_size (o, attr_size); |
b8a6ced7 AM |
12140 | /* Skip this section later on. */ |
12141 | o->map_head.link_order = NULL; | |
104d59d1 | 12142 | if (attr_size) |
b8a6ced7 | 12143 | attr_section = o; |
104d59d1 | 12144 | else |
0a1b45a2 | 12145 | remove_section = true; |
104d59d1 | 12146 | } |
6e5e9d58 AM |
12147 | else if ((o->flags & SEC_GROUP) != 0 && o->size == 0) |
12148 | { | |
12149 | /* Remove empty group section from linker output. */ | |
0a1b45a2 | 12150 | remove_section = true; |
b8a6ced7 | 12151 | } |
5270eddc | 12152 | if (remove_section) |
b8a6ced7 | 12153 | { |
6e5e9d58 AM |
12154 | o->flags |= SEC_EXCLUDE; |
12155 | bfd_section_list_remove (abfd, o); | |
12156 | abfd->section_count--; | |
0a1b45a2 | 12157 | sections_removed = true; |
6e5e9d58 | 12158 | } |
104d59d1 | 12159 | } |
4c6ee646 AM |
12160 | if (sections_removed) |
12161 | _bfd_fix_excluded_sec_syms (abfd, info); | |
104d59d1 | 12162 | |
c152c796 AM |
12163 | /* Count up the number of relocations we will output for each output |
12164 | section, so that we know the sizes of the reloc sections. We | |
12165 | also figure out some maximum sizes. */ | |
12166 | max_contents_size = 0; | |
12167 | max_external_reloc_size = 0; | |
12168 | max_internal_reloc_count = 0; | |
12169 | max_sym_count = 0; | |
12170 | max_sym_shndx_count = 0; | |
0a1b45a2 | 12171 | merged = false; |
c152c796 AM |
12172 | for (o = abfd->sections; o != NULL; o = o->next) |
12173 | { | |
12174 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
12175 | o->reloc_count = 0; | |
12176 | ||
8423293d | 12177 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
12178 | { |
12179 | unsigned int reloc_count = 0; | |
9eaff861 | 12180 | unsigned int additional_reloc_count = 0; |
c152c796 | 12181 | struct bfd_elf_section_data *esdi = NULL; |
c152c796 AM |
12182 | |
12183 | if (p->type == bfd_section_reloc_link_order | |
12184 | || p->type == bfd_symbol_reloc_link_order) | |
12185 | reloc_count = 1; | |
12186 | else if (p->type == bfd_indirect_link_order) | |
12187 | { | |
12188 | asection *sec; | |
12189 | ||
12190 | sec = p->u.indirect.section; | |
c152c796 AM |
12191 | |
12192 | /* Mark all sections which are to be included in the | |
12193 | link. This will normally be every section. We need | |
12194 | to do this so that we can identify any sections which | |
12195 | the linker has decided to not include. */ | |
0a1b45a2 | 12196 | sec->linker_mark = true; |
c152c796 AM |
12197 | |
12198 | if (sec->flags & SEC_MERGE) | |
0a1b45a2 | 12199 | merged = true; |
c152c796 | 12200 | |
eea6121a AM |
12201 | if (sec->rawsize > max_contents_size) |
12202 | max_contents_size = sec->rawsize; | |
12203 | if (sec->size > max_contents_size) | |
12204 | max_contents_size = sec->size; | |
c152c796 | 12205 | |
c152c796 AM |
12206 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour |
12207 | && (sec->owner->flags & DYNAMIC) == 0) | |
12208 | { | |
12209 | size_t sym_count; | |
12210 | ||
a961cdd5 AM |
12211 | /* We are interested in just local symbols, not all |
12212 | symbols. */ | |
c152c796 AM |
12213 | if (elf_bad_symtab (sec->owner)) |
12214 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
12215 | / bed->s->sizeof_sym); | |
12216 | else | |
12217 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
12218 | ||
12219 | if (sym_count > max_sym_count) | |
12220 | max_sym_count = sym_count; | |
12221 | ||
12222 | if (sym_count > max_sym_shndx_count | |
6a40cf0c | 12223 | && elf_symtab_shndx_list (sec->owner) != NULL) |
c152c796 AM |
12224 | max_sym_shndx_count = sym_count; |
12225 | ||
a961cdd5 AM |
12226 | if (esdo->this_hdr.sh_type == SHT_REL |
12227 | || esdo->this_hdr.sh_type == SHT_RELA) | |
12228 | /* Some backends use reloc_count in relocation sections | |
12229 | to count particular types of relocs. Of course, | |
12230 | reloc sections themselves can't have relocations. */ | |
12231 | ; | |
12232 | else if (emit_relocs) | |
12233 | { | |
12234 | reloc_count = sec->reloc_count; | |
12235 | if (bed->elf_backend_count_additional_relocs) | |
12236 | { | |
12237 | int c; | |
12238 | c = (*bed->elf_backend_count_additional_relocs) (sec); | |
12239 | additional_reloc_count += c; | |
12240 | } | |
12241 | } | |
12242 | else if (bed->elf_backend_count_relocs) | |
12243 | reloc_count = (*bed->elf_backend_count_relocs) (info, sec); | |
12244 | ||
12245 | esdi = elf_section_data (sec); | |
12246 | ||
c152c796 AM |
12247 | if ((sec->flags & SEC_RELOC) != 0) |
12248 | { | |
d4730f92 | 12249 | size_t ext_size = 0; |
c152c796 | 12250 | |
d4730f92 BS |
12251 | if (esdi->rel.hdr != NULL) |
12252 | ext_size = esdi->rel.hdr->sh_size; | |
12253 | if (esdi->rela.hdr != NULL) | |
12254 | ext_size += esdi->rela.hdr->sh_size; | |
7326c758 | 12255 | |
c152c796 AM |
12256 | if (ext_size > max_external_reloc_size) |
12257 | max_external_reloc_size = ext_size; | |
12258 | if (sec->reloc_count > max_internal_reloc_count) | |
12259 | max_internal_reloc_count = sec->reloc_count; | |
12260 | } | |
12261 | } | |
12262 | } | |
12263 | ||
12264 | if (reloc_count == 0) | |
12265 | continue; | |
12266 | ||
9eaff861 | 12267 | reloc_count += additional_reloc_count; |
c152c796 AM |
12268 | o->reloc_count += reloc_count; |
12269 | ||
0e1862bb | 12270 | if (p->type == bfd_indirect_link_order && emit_relocs) |
c152c796 | 12271 | { |
d4730f92 | 12272 | if (esdi->rel.hdr) |
9eaff861 | 12273 | { |
491d01d3 | 12274 | esdo->rel.count += NUM_SHDR_ENTRIES (esdi->rel.hdr); |
9eaff861 AO |
12275 | esdo->rel.count += additional_reloc_count; |
12276 | } | |
d4730f92 | 12277 | if (esdi->rela.hdr) |
9eaff861 | 12278 | { |
491d01d3 | 12279 | esdo->rela.count += NUM_SHDR_ENTRIES (esdi->rela.hdr); |
9eaff861 AO |
12280 | esdo->rela.count += additional_reloc_count; |
12281 | } | |
d4730f92 BS |
12282 | } |
12283 | else | |
12284 | { | |
12285 | if (o->use_rela_p) | |
12286 | esdo->rela.count += reloc_count; | |
2c2b4ed4 | 12287 | else |
d4730f92 | 12288 | esdo->rel.count += reloc_count; |
c152c796 | 12289 | } |
c152c796 AM |
12290 | } |
12291 | ||
9eaff861 | 12292 | if (o->reloc_count > 0) |
c152c796 AM |
12293 | o->flags |= SEC_RELOC; |
12294 | else | |
12295 | { | |
12296 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
12297 | set it (this is probably a bug) and if it is set | |
12298 | assign_section_numbers will create a reloc section. */ | |
12299 | o->flags &=~ SEC_RELOC; | |
12300 | } | |
12301 | ||
12302 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
12303 | zero. This is done in elf_fake_sections as well, but forcing | |
12304 | the VMA to 0 here will ensure that relocs against these | |
12305 | sections are handled correctly. */ | |
12306 | if ((o->flags & SEC_ALLOC) == 0 | |
12307 | && ! o->user_set_vma) | |
12308 | o->vma = 0; | |
12309 | } | |
12310 | ||
0e1862bb | 12311 | if (! bfd_link_relocatable (info) && merged) |
64f52338 | 12312 | elf_link_hash_traverse (htab, _bfd_elf_link_sec_merge_syms, abfd); |
c152c796 AM |
12313 | |
12314 | /* Figure out the file positions for everything but the symbol table | |
12315 | and the relocs. We set symcount to force assign_section_numbers | |
12316 | to create a symbol table. */ | |
ed48ec2e | 12317 | abfd->symcount = info->strip != strip_all || emit_relocs; |
c152c796 AM |
12318 | BFD_ASSERT (! abfd->output_has_begun); |
12319 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
12320 | goto error_return; | |
12321 | ||
ee75fd95 | 12322 | /* Set sizes, and assign file positions for reloc sections. */ |
c152c796 AM |
12323 | for (o = abfd->sections; o != NULL; o = o->next) |
12324 | { | |
d4730f92 | 12325 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
c152c796 AM |
12326 | if ((o->flags & SEC_RELOC) != 0) |
12327 | { | |
d4730f92 | 12328 | if (esdo->rel.hdr |
9eaff861 | 12329 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rel))) |
c152c796 AM |
12330 | goto error_return; |
12331 | ||
d4730f92 | 12332 | if (esdo->rela.hdr |
9eaff861 | 12333 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rela))) |
c152c796 AM |
12334 | goto error_return; |
12335 | } | |
12336 | ||
48db3297 AM |
12337 | /* _bfd_elf_compute_section_file_positions makes temporary use |
12338 | of target_index. Reset it. */ | |
12339 | o->target_index = 0; | |
12340 | ||
c152c796 AM |
12341 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them |
12342 | to count upwards while actually outputting the relocations. */ | |
d4730f92 BS |
12343 | esdo->rel.count = 0; |
12344 | esdo->rela.count = 0; | |
0ce398f1 | 12345 | |
1ff6de03 NA |
12346 | if ((esdo->this_hdr.sh_offset == (file_ptr) -1) |
12347 | && !bfd_section_is_ctf (o)) | |
0ce398f1 L |
12348 | { |
12349 | /* Cache the section contents so that they can be compressed | |
12350 | later. Use bfd_malloc since it will be freed by | |
12351 | bfd_compress_section_contents. */ | |
12352 | unsigned char *contents = esdo->this_hdr.contents; | |
12353 | if ((o->flags & SEC_ELF_COMPRESS) == 0 || contents != NULL) | |
12354 | abort (); | |
12355 | contents | |
12356 | = (unsigned char *) bfd_malloc (esdo->this_hdr.sh_size); | |
12357 | if (contents == NULL) | |
12358 | goto error_return; | |
12359 | esdo->this_hdr.contents = contents; | |
12360 | } | |
c152c796 AM |
12361 | } |
12362 | ||
1ff6de03 NA |
12363 | /* We have now assigned file positions for all the sections except .symtab, |
12364 | .strtab, and non-loaded reloc and compressed debugging sections. We start | |
12365 | the .symtab section at the current file position, and write directly to it. | |
12366 | We build the .strtab section in memory. */ | |
ed48ec2e | 12367 | abfd->symcount = 0; |
c152c796 AM |
12368 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
12369 | /* sh_name is set in prep_headers. */ | |
12370 | symtab_hdr->sh_type = SHT_SYMTAB; | |
12371 | /* sh_flags, sh_addr and sh_size all start off zero. */ | |
12372 | symtab_hdr->sh_entsize = bed->s->sizeof_sym; | |
12373 | /* sh_link is set in assign_section_numbers. */ | |
12374 | /* sh_info is set below. */ | |
12375 | /* sh_offset is set just below. */ | |
72de5009 | 12376 | symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align; |
c152c796 | 12377 | |
ef10c3ac L |
12378 | if (max_sym_count < 20) |
12379 | max_sym_count = 20; | |
64f52338 | 12380 | htab->strtabsize = max_sym_count; |
ef10c3ac | 12381 | amt = max_sym_count * sizeof (struct elf_sym_strtab); |
64f52338 AM |
12382 | htab->strtab = (struct elf_sym_strtab *) bfd_malloc (amt); |
12383 | if (htab->strtab == NULL) | |
c152c796 | 12384 | goto error_return; |
ef10c3ac L |
12385 | /* The real buffer will be allocated in elf_link_swap_symbols_out. */ |
12386 | flinfo.symshndxbuf | |
12387 | = (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF) | |
12388 | ? (Elf_External_Sym_Shndx *) -1 : NULL); | |
c152c796 | 12389 | |
8539e4e8 | 12390 | if (info->strip != strip_all || emit_relocs) |
c152c796 | 12391 | { |
8539e4e8 AM |
12392 | file_ptr off = elf_next_file_pos (abfd); |
12393 | ||
0a1b45a2 | 12394 | _bfd_elf_assign_file_position_for_section (symtab_hdr, off, true); |
8539e4e8 AM |
12395 | |
12396 | /* Note that at this point elf_next_file_pos (abfd) is | |
12397 | incorrect. We do not yet know the size of the .symtab section. | |
12398 | We correct next_file_pos below, after we do know the size. */ | |
12399 | ||
12400 | /* Start writing out the symbol table. The first symbol is always a | |
12401 | dummy symbol. */ | |
c152c796 AM |
12402 | elfsym.st_value = 0; |
12403 | elfsym.st_size = 0; | |
12404 | elfsym.st_info = 0; | |
12405 | elfsym.st_other = 0; | |
12406 | elfsym.st_shndx = SHN_UNDEF; | |
35fc36a8 | 12407 | elfsym.st_target_internal = 0; |
ef10c3ac L |
12408 | if (elf_link_output_symstrtab (&flinfo, NULL, &elfsym, |
12409 | bfd_und_section_ptr, NULL) != 1) | |
c152c796 | 12410 | goto error_return; |
c152c796 | 12411 | |
d1bcae83 L |
12412 | /* Output a symbol for each section if asked or they are used for |
12413 | relocs. These symbols usually have no names. We store the | |
12414 | index of each one in the index field of the section, so that | |
12415 | we can find it again when outputting relocs. */ | |
c77cb2a0 | 12416 | |
d1bcae83 | 12417 | if (bfd_keep_unused_section_symbols (abfd) || emit_relocs) |
c152c796 | 12418 | { |
0a1b45a2 | 12419 | bool name_local_sections |
d1bcae83 L |
12420 | = (bed->elf_backend_name_local_section_symbols |
12421 | && bed->elf_backend_name_local_section_symbols (abfd)); | |
12422 | const char *name = NULL; | |
12423 | ||
12424 | elfsym.st_size = 0; | |
12425 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
12426 | elfsym.st_other = 0; | |
12427 | elfsym.st_value = 0; | |
12428 | elfsym.st_target_internal = 0; | |
12429 | for (i = 1; i < elf_numsections (abfd); i++) | |
f0b5bb34 | 12430 | { |
d1bcae83 L |
12431 | o = bfd_section_from_elf_index (abfd, i); |
12432 | if (o != NULL) | |
12433 | { | |
12434 | o->target_index = bfd_get_symcount (abfd); | |
12435 | elfsym.st_shndx = i; | |
12436 | if (!bfd_link_relocatable (info)) | |
12437 | elfsym.st_value = o->vma; | |
12438 | if (name_local_sections) | |
12439 | name = o->name; | |
12440 | if (elf_link_output_symstrtab (&flinfo, name, &elfsym, o, | |
12441 | NULL) != 1) | |
12442 | goto error_return; | |
12443 | } | |
f0b5bb34 | 12444 | } |
c152c796 AM |
12445 | } |
12446 | } | |
12447 | ||
3f1b17bb MR |
12448 | /* On some targets like Irix 5 the symbol split between local and global |
12449 | ones recorded in the sh_info field needs to be done between section | |
12450 | and all other symbols. */ | |
12451 | if (bed->elf_backend_elfsym_local_is_section | |
12452 | && bed->elf_backend_elfsym_local_is_section (abfd)) | |
12453 | symtab_hdr->sh_info = bfd_get_symcount (abfd); | |
12454 | ||
c152c796 AM |
12455 | /* Allocate some memory to hold information read in from the input |
12456 | files. */ | |
12457 | if (max_contents_size != 0) | |
12458 | { | |
8b127cbc AM |
12459 | flinfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); |
12460 | if (flinfo.contents == NULL) | |
c152c796 AM |
12461 | goto error_return; |
12462 | } | |
12463 | ||
12464 | if (max_external_reloc_size != 0) | |
12465 | { | |
8b127cbc AM |
12466 | flinfo.external_relocs = bfd_malloc (max_external_reloc_size); |
12467 | if (flinfo.external_relocs == NULL) | |
c152c796 AM |
12468 | goto error_return; |
12469 | } | |
12470 | ||
12471 | if (max_internal_reloc_count != 0) | |
12472 | { | |
056bafd4 | 12473 | amt = max_internal_reloc_count * sizeof (Elf_Internal_Rela); |
8b127cbc AM |
12474 | flinfo.internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); |
12475 | if (flinfo.internal_relocs == NULL) | |
c152c796 AM |
12476 | goto error_return; |
12477 | } | |
12478 | ||
12479 | if (max_sym_count != 0) | |
12480 | { | |
12481 | amt = max_sym_count * bed->s->sizeof_sym; | |
8b127cbc AM |
12482 | flinfo.external_syms = (bfd_byte *) bfd_malloc (amt); |
12483 | if (flinfo.external_syms == NULL) | |
c152c796 AM |
12484 | goto error_return; |
12485 | ||
12486 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
8b127cbc AM |
12487 | flinfo.internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt); |
12488 | if (flinfo.internal_syms == NULL) | |
c152c796 AM |
12489 | goto error_return; |
12490 | ||
12491 | amt = max_sym_count * sizeof (long); | |
8b127cbc AM |
12492 | flinfo.indices = (long int *) bfd_malloc (amt); |
12493 | if (flinfo.indices == NULL) | |
c152c796 AM |
12494 | goto error_return; |
12495 | ||
12496 | amt = max_sym_count * sizeof (asection *); | |
8b127cbc AM |
12497 | flinfo.sections = (asection **) bfd_malloc (amt); |
12498 | if (flinfo.sections == NULL) | |
c152c796 AM |
12499 | goto error_return; |
12500 | } | |
12501 | ||
12502 | if (max_sym_shndx_count != 0) | |
12503 | { | |
12504 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
8b127cbc AM |
12505 | flinfo.locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt); |
12506 | if (flinfo.locsym_shndx == NULL) | |
c152c796 AM |
12507 | goto error_return; |
12508 | } | |
12509 | ||
64f52338 | 12510 | if (htab->tls_sec) |
c152c796 | 12511 | { |
66631823 | 12512 | bfd_vma base, end = 0; /* Both bytes. */ |
c152c796 AM |
12513 | asection *sec; |
12514 | ||
64f52338 | 12515 | for (sec = htab->tls_sec; |
c152c796 AM |
12516 | sec && (sec->flags & SEC_THREAD_LOCAL); |
12517 | sec = sec->next) | |
12518 | { | |
3a800eb9 | 12519 | bfd_size_type size = sec->size; |
66631823 | 12520 | unsigned int opb = bfd_octets_per_byte (abfd, sec); |
c152c796 | 12521 | |
3a800eb9 AM |
12522 | if (size == 0 |
12523 | && (sec->flags & SEC_HAS_CONTENTS) == 0) | |
c152c796 | 12524 | { |
91d6fa6a NC |
12525 | struct bfd_link_order *ord = sec->map_tail.link_order; |
12526 | ||
12527 | if (ord != NULL) | |
66631823 | 12528 | size = ord->offset * opb + ord->size; |
c152c796 | 12529 | } |
66631823 | 12530 | end = sec->vma + size / opb; |
c152c796 | 12531 | } |
64f52338 | 12532 | base = htab->tls_sec->vma; |
7dc98aea RO |
12533 | /* Only align end of TLS section if static TLS doesn't have special |
12534 | alignment requirements. */ | |
12535 | if (bed->static_tls_alignment == 1) | |
64f52338 AM |
12536 | end = align_power (end, htab->tls_sec->alignment_power); |
12537 | htab->tls_size = end - base; | |
c152c796 AM |
12538 | } |
12539 | ||
2f0c68f2 | 12540 | if (!_bfd_elf_fixup_eh_frame_hdr (info)) |
0a1b45a2 | 12541 | return false; |
2f0c68f2 | 12542 | |
c152c796 AM |
12543 | /* Since ELF permits relocations to be against local symbols, we |
12544 | must have the local symbols available when we do the relocations. | |
12545 | Since we would rather only read the local symbols once, and we | |
12546 | would rather not keep them in memory, we handle all the | |
12547 | relocations for a single input file at the same time. | |
12548 | ||
12549 | Unfortunately, there is no way to know the total number of local | |
12550 | symbols until we have seen all of them, and the local symbol | |
12551 | indices precede the global symbol indices. This means that when | |
12552 | we are generating relocatable output, and we see a reloc against | |
12553 | a global symbol, we can not know the symbol index until we have | |
12554 | finished examining all the local symbols to see which ones we are | |
12555 | going to output. To deal with this, we keep the relocations in | |
12556 | memory, and don't output them until the end of the link. This is | |
12557 | an unfortunate waste of memory, but I don't see a good way around | |
12558 | it. Fortunately, it only happens when performing a relocatable | |
12559 | link, which is not the common case. FIXME: If keep_memory is set | |
12560 | we could write the relocs out and then read them again; I don't | |
12561 | know how bad the memory loss will be. */ | |
12562 | ||
c72f2fb2 | 12563 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
0a1b45a2 | 12564 | sub->output_has_begun = false; |
c152c796 AM |
12565 | for (o = abfd->sections; o != NULL; o = o->next) |
12566 | { | |
8423293d | 12567 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
12568 | { |
12569 | if (p->type == bfd_indirect_link_order | |
12570 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) | |
12571 | == bfd_target_elf_flavour) | |
12572 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) | |
12573 | { | |
12574 | if (! sub->output_has_begun) | |
12575 | { | |
8b127cbc | 12576 | if (! elf_link_input_bfd (&flinfo, sub)) |
c152c796 | 12577 | goto error_return; |
0a1b45a2 | 12578 | sub->output_has_begun = true; |
c152c796 AM |
12579 | } |
12580 | } | |
12581 | else if (p->type == bfd_section_reloc_link_order | |
12582 | || p->type == bfd_symbol_reloc_link_order) | |
12583 | { | |
12584 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
12585 | goto error_return; | |
12586 | } | |
12587 | else | |
12588 | { | |
12589 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
351f65ca L |
12590 | { |
12591 | if (p->type == bfd_indirect_link_order | |
12592 | && (bfd_get_flavour (sub) | |
12593 | == bfd_target_elf_flavour) | |
12594 | && (elf_elfheader (sub)->e_ident[EI_CLASS] | |
12595 | != bed->s->elfclass)) | |
12596 | { | |
12597 | const char *iclass, *oclass; | |
12598 | ||
aebf9be7 | 12599 | switch (bed->s->elfclass) |
351f65ca | 12600 | { |
aebf9be7 NC |
12601 | case ELFCLASS64: oclass = "ELFCLASS64"; break; |
12602 | case ELFCLASS32: oclass = "ELFCLASS32"; break; | |
12603 | case ELFCLASSNONE: oclass = "ELFCLASSNONE"; break; | |
12604 | default: abort (); | |
351f65ca | 12605 | } |
aebf9be7 NC |
12606 | |
12607 | switch (elf_elfheader (sub)->e_ident[EI_CLASS]) | |
351f65ca | 12608 | { |
aebf9be7 NC |
12609 | case ELFCLASS64: iclass = "ELFCLASS64"; break; |
12610 | case ELFCLASS32: iclass = "ELFCLASS32"; break; | |
12611 | case ELFCLASSNONE: iclass = "ELFCLASSNONE"; break; | |
12612 | default: abort (); | |
351f65ca L |
12613 | } |
12614 | ||
12615 | bfd_set_error (bfd_error_wrong_format); | |
4eca0228 | 12616 | _bfd_error_handler |
695344c0 | 12617 | /* xgettext:c-format */ |
871b3ab2 | 12618 | (_("%pB: file class %s incompatible with %s"), |
351f65ca L |
12619 | sub, iclass, oclass); |
12620 | } | |
12621 | ||
12622 | goto error_return; | |
12623 | } | |
c152c796 AM |
12624 | } |
12625 | } | |
12626 | } | |
12627 | ||
c0f00686 L |
12628 | /* Free symbol buffer if needed. */ |
12629 | if (!info->reduce_memory_overheads) | |
12630 | { | |
c72f2fb2 | 12631 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c9594989 | 12632 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour) |
c0f00686 L |
12633 | { |
12634 | free (elf_tdata (sub)->symbuf); | |
12635 | elf_tdata (sub)->symbuf = NULL; | |
12636 | } | |
12637 | } | |
12638 | ||
0a1b45a2 | 12639 | ret = true; |
496afd17 | 12640 | |
c152c796 AM |
12641 | /* Output any global symbols that got converted to local in a |
12642 | version script or due to symbol visibility. We do this in a | |
12643 | separate step since ELF requires all local symbols to appear | |
12644 | prior to any global symbols. FIXME: We should only do this if | |
12645 | some global symbols were, in fact, converted to become local. | |
12646 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
0a1b45a2 | 12647 | eoinfo.failed = false; |
8b127cbc | 12648 | eoinfo.flinfo = &flinfo; |
0a1b45a2 AM |
12649 | eoinfo.localsyms = true; |
12650 | eoinfo.file_sym_done = false; | |
7686d77d | 12651 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 | 12652 | if (eoinfo.failed) |
496afd17 | 12653 | { |
0a1b45a2 | 12654 | ret = false; |
496afd17 L |
12655 | goto return_local_hash_table; |
12656 | } | |
c152c796 | 12657 | |
4e617b1e PB |
12658 | /* If backend needs to output some local symbols not present in the hash |
12659 | table, do it now. */ | |
8539e4e8 AM |
12660 | if (bed->elf_backend_output_arch_local_syms |
12661 | && (info->strip != strip_all || emit_relocs)) | |
4e617b1e | 12662 | { |
4e617b1e | 12663 | if (! ((*bed->elf_backend_output_arch_local_syms) |
37bb890f | 12664 | (abfd, info, &flinfo, elf_link_output_symstrtab))) |
496afd17 | 12665 | { |
0a1b45a2 | 12666 | ret = false; |
496afd17 L |
12667 | goto return_local_hash_table; |
12668 | } | |
4e617b1e PB |
12669 | } |
12670 | ||
c152c796 AM |
12671 | /* That wrote out all the local symbols. Finish up the symbol table |
12672 | with the global symbols. Even if we want to strip everything we | |
12673 | can, we still need to deal with those global symbols that got | |
12674 | converted to local in a version script. */ | |
12675 | ||
12676 | /* The sh_info field records the index of the first non local symbol. */ | |
3f1b17bb MR |
12677 | if (!symtab_hdr->sh_info) |
12678 | symtab_hdr->sh_info = bfd_get_symcount (abfd); | |
c152c796 AM |
12679 | |
12680 | if (dynamic | |
64f52338 AM |
12681 | && htab->dynsym != NULL |
12682 | && htab->dynsym->output_section != bfd_abs_section_ptr) | |
c152c796 AM |
12683 | { |
12684 | Elf_Internal_Sym sym; | |
64f52338 | 12685 | bfd_byte *dynsym = htab->dynsym->contents; |
90ac2420 | 12686 | |
64f52338 AM |
12687 | o = htab->dynsym->output_section; |
12688 | elf_section_data (o)->this_hdr.sh_info = htab->local_dynsymcount + 1; | |
c152c796 AM |
12689 | |
12690 | /* Write out the section symbols for the output sections. */ | |
0e1862bb | 12691 | if (bfd_link_pic (info) |
64f52338 | 12692 | || htab->is_relocatable_executable) |
c152c796 AM |
12693 | { |
12694 | asection *s; | |
12695 | ||
12696 | sym.st_size = 0; | |
12697 | sym.st_name = 0; | |
12698 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
12699 | sym.st_other = 0; | |
35fc36a8 | 12700 | sym.st_target_internal = 0; |
c152c796 AM |
12701 | |
12702 | for (s = abfd->sections; s != NULL; s = s->next) | |
12703 | { | |
12704 | int indx; | |
12705 | bfd_byte *dest; | |
12706 | long dynindx; | |
12707 | ||
c152c796 | 12708 | dynindx = elf_section_data (s)->dynindx; |
8c37241b JJ |
12709 | if (dynindx <= 0) |
12710 | continue; | |
12711 | indx = elf_section_data (s)->this_idx; | |
c152c796 AM |
12712 | BFD_ASSERT (indx > 0); |
12713 | sym.st_shndx = indx; | |
c0d5a53d | 12714 | if (! check_dynsym (abfd, &sym)) |
496afd17 | 12715 | { |
0a1b45a2 | 12716 | ret = false; |
496afd17 L |
12717 | goto return_local_hash_table; |
12718 | } | |
c152c796 AM |
12719 | sym.st_value = s->vma; |
12720 | dest = dynsym + dynindx * bed->s->sizeof_sym; | |
3d16b64e NA |
12721 | |
12722 | /* Inform the linker of the addition of this symbol. */ | |
12723 | ||
12724 | if (info->callbacks->ctf_new_dynsym) | |
12725 | info->callbacks->ctf_new_dynsym (dynindx, &sym); | |
12726 | ||
c152c796 AM |
12727 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); |
12728 | } | |
c152c796 AM |
12729 | } |
12730 | ||
12731 | /* Write out the local dynsyms. */ | |
64f52338 | 12732 | if (htab->dynlocal) |
c152c796 AM |
12733 | { |
12734 | struct elf_link_local_dynamic_entry *e; | |
64f52338 | 12735 | for (e = htab->dynlocal; e ; e = e->next) |
c152c796 AM |
12736 | { |
12737 | asection *s; | |
12738 | bfd_byte *dest; | |
12739 | ||
935bd1e0 | 12740 | /* Copy the internal symbol and turn off visibility. |
c152c796 AM |
12741 | Note that we saved a word of storage and overwrote |
12742 | the original st_name with the dynstr_index. */ | |
12743 | sym = e->isym; | |
935bd1e0 | 12744 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); |
4d68fd75 | 12745 | sym.st_shndx = SHN_UNDEF; |
c152c796 | 12746 | |
cb33740c AM |
12747 | s = bfd_section_from_elf_index (e->input_bfd, |
12748 | e->isym.st_shndx); | |
4d68fd75 AM |
12749 | if (s != NULL |
12750 | && s->output_section != NULL | |
12751 | && elf_section_data (s->output_section) != NULL) | |
c152c796 | 12752 | { |
c152c796 AM |
12753 | sym.st_shndx = |
12754 | elf_section_data (s->output_section)->this_idx; | |
c0d5a53d | 12755 | if (! check_dynsym (abfd, &sym)) |
496afd17 | 12756 | { |
0a1b45a2 | 12757 | ret = false; |
496afd17 L |
12758 | goto return_local_hash_table; |
12759 | } | |
c152c796 AM |
12760 | sym.st_value = (s->output_section->vma |
12761 | + s->output_offset | |
12762 | + e->isym.st_value); | |
12763 | } | |
12764 | ||
3d16b64e NA |
12765 | /* Inform the linker of the addition of this symbol. */ |
12766 | ||
12767 | if (info->callbacks->ctf_new_dynsym) | |
12768 | info->callbacks->ctf_new_dynsym (e->dynindx, &sym); | |
12769 | ||
c152c796 AM |
12770 | dest = dynsym + e->dynindx * bed->s->sizeof_sym; |
12771 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); | |
12772 | } | |
12773 | } | |
c152c796 AM |
12774 | } |
12775 | ||
12776 | /* We get the global symbols from the hash table. */ | |
0a1b45a2 AM |
12777 | eoinfo.failed = false; |
12778 | eoinfo.localsyms = false; | |
8b127cbc | 12779 | eoinfo.flinfo = &flinfo; |
7686d77d | 12780 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 | 12781 | if (eoinfo.failed) |
496afd17 | 12782 | { |
0a1b45a2 | 12783 | ret = false; |
496afd17 L |
12784 | goto return_local_hash_table; |
12785 | } | |
c152c796 AM |
12786 | |
12787 | /* If backend needs to output some symbols not present in the hash | |
12788 | table, do it now. */ | |
8539e4e8 AM |
12789 | if (bed->elf_backend_output_arch_syms |
12790 | && (info->strip != strip_all || emit_relocs)) | |
c152c796 | 12791 | { |
c152c796 | 12792 | if (! ((*bed->elf_backend_output_arch_syms) |
37bb890f | 12793 | (abfd, info, &flinfo, elf_link_output_symstrtab))) |
496afd17 | 12794 | { |
0a1b45a2 | 12795 | ret = false; |
496afd17 L |
12796 | goto return_local_hash_table; |
12797 | } | |
c152c796 AM |
12798 | } |
12799 | ||
ef10c3ac L |
12800 | /* Finalize the .strtab section. */ |
12801 | _bfd_elf_strtab_finalize (flinfo.symstrtab); | |
12802 | ||
12803 | /* Swap out the .strtab section. */ | |
12804 | if (!elf_link_swap_symbols_out (&flinfo)) | |
496afd17 | 12805 | { |
0a1b45a2 | 12806 | ret = false; |
496afd17 L |
12807 | goto return_local_hash_table; |
12808 | } | |
c152c796 AM |
12809 | |
12810 | /* Now we know the size of the symtab section. */ | |
c152c796 AM |
12811 | if (bfd_get_symcount (abfd) > 0) |
12812 | { | |
ee3b52e9 L |
12813 | /* Finish up and write out the symbol string table (.strtab) |
12814 | section. */ | |
ad32986f | 12815 | Elf_Internal_Shdr *symstrtab_hdr = NULL; |
8539e4e8 AM |
12816 | file_ptr off = symtab_hdr->sh_offset + symtab_hdr->sh_size; |
12817 | ||
ad32986f | 12818 | if (elf_symtab_shndx_list (abfd)) |
8539e4e8 | 12819 | { |
ad32986f | 12820 | symtab_shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; |
8539e4e8 | 12821 | |
ad32986f NC |
12822 | if (symtab_shndx_hdr != NULL && symtab_shndx_hdr->sh_name != 0) |
12823 | { | |
12824 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
12825 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
12826 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
12827 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
12828 | symtab_shndx_hdr->sh_size = amt; | |
8539e4e8 | 12829 | |
ad32986f | 12830 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, |
0a1b45a2 | 12831 | off, true); |
ad32986f NC |
12832 | |
12833 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
12834 | || (bfd_bwrite (flinfo.symshndxbuf, amt, abfd) != amt)) | |
496afd17 | 12835 | { |
0a1b45a2 | 12836 | ret = false; |
496afd17 L |
12837 | goto return_local_hash_table; |
12838 | } | |
ad32986f | 12839 | } |
8539e4e8 | 12840 | } |
ee3b52e9 L |
12841 | |
12842 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
12843 | /* sh_name was set in prep_headers. */ | |
12844 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
84865015 | 12845 | symstrtab_hdr->sh_flags = bed->elf_strtab_flags; |
ee3b52e9 | 12846 | symstrtab_hdr->sh_addr = 0; |
ef10c3ac | 12847 | symstrtab_hdr->sh_size = _bfd_elf_strtab_size (flinfo.symstrtab); |
ee3b52e9 L |
12848 | symstrtab_hdr->sh_entsize = 0; |
12849 | symstrtab_hdr->sh_link = 0; | |
12850 | symstrtab_hdr->sh_info = 0; | |
12851 | /* sh_offset is set just below. */ | |
12852 | symstrtab_hdr->sh_addralign = 1; | |
12853 | ||
12854 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, | |
0a1b45a2 | 12855 | off, true); |
ee3b52e9 L |
12856 | elf_next_file_pos (abfd) = off; |
12857 | ||
c152c796 | 12858 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 |
ef10c3ac | 12859 | || ! _bfd_elf_strtab_emit (abfd, flinfo.symstrtab)) |
496afd17 | 12860 | { |
0a1b45a2 | 12861 | ret = false; |
496afd17 L |
12862 | goto return_local_hash_table; |
12863 | } | |
c152c796 AM |
12864 | } |
12865 | ||
76359541 TP |
12866 | if (info->out_implib_bfd && !elf_output_implib (abfd, info)) |
12867 | { | |
871b3ab2 | 12868 | _bfd_error_handler (_("%pB: failed to generate import library"), |
4eca0228 | 12869 | info->out_implib_bfd); |
0a1b45a2 | 12870 | ret = false; |
496afd17 | 12871 | goto return_local_hash_table; |
76359541 TP |
12872 | } |
12873 | ||
c152c796 AM |
12874 | /* Adjust the relocs to have the correct symbol indices. */ |
12875 | for (o = abfd->sections; o != NULL; o = o->next) | |
12876 | { | |
d4730f92 | 12877 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
0a1b45a2 | 12878 | bool sort; |
10bbbc1d | 12879 | |
c152c796 AM |
12880 | if ((o->flags & SEC_RELOC) == 0) |
12881 | continue; | |
12882 | ||
28dbcedc | 12883 | sort = bed->sort_relocs_p == NULL || (*bed->sort_relocs_p) (o); |
bca6d0e3 | 12884 | if (esdo->rel.hdr != NULL |
10bbbc1d | 12885 | && !elf_link_adjust_relocs (abfd, o, &esdo->rel, sort, info)) |
496afd17 | 12886 | { |
0a1b45a2 | 12887 | ret = false; |
496afd17 L |
12888 | goto return_local_hash_table; |
12889 | } | |
bca6d0e3 | 12890 | if (esdo->rela.hdr != NULL |
10bbbc1d | 12891 | && !elf_link_adjust_relocs (abfd, o, &esdo->rela, sort, info)) |
496afd17 | 12892 | { |
0a1b45a2 | 12893 | ret = false; |
496afd17 L |
12894 | goto return_local_hash_table; |
12895 | } | |
c152c796 AM |
12896 | |
12897 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
12898 | trying to swap the relocs out itself. */ | |
12899 | o->reloc_count = 0; | |
12900 | } | |
12901 | ||
12902 | if (dynamic && info->combreloc && dynobj != NULL) | |
12903 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
12904 | ||
12905 | /* If we are linking against a dynamic object, or generating a | |
12906 | shared library, finish up the dynamic linking information. */ | |
12907 | if (dynamic) | |
12908 | { | |
12909 | bfd_byte *dyncon, *dynconend; | |
12910 | ||
12911 | /* Fix up .dynamic entries. */ | |
3d4d4302 | 12912 | o = bfd_get_linker_section (dynobj, ".dynamic"); |
c152c796 AM |
12913 | BFD_ASSERT (o != NULL); |
12914 | ||
12915 | dyncon = o->contents; | |
eea6121a | 12916 | dynconend = o->contents + o->size; |
c152c796 AM |
12917 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) |
12918 | { | |
12919 | Elf_Internal_Dyn dyn; | |
12920 | const char *name; | |
12921 | unsigned int type; | |
64487780 AM |
12922 | bfd_size_type sh_size; |
12923 | bfd_vma sh_addr; | |
c152c796 AM |
12924 | |
12925 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
12926 | ||
12927 | switch (dyn.d_tag) | |
12928 | { | |
12929 | default: | |
12930 | continue; | |
12931 | case DT_NULL: | |
12932 | if (relativecount > 0 && dyncon + bed->s->sizeof_dyn < dynconend) | |
12933 | { | |
12934 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
12935 | { | |
12936 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
12937 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
12938 | default: continue; | |
12939 | } | |
12940 | dyn.d_un.d_val = relativecount; | |
12941 | relativecount = 0; | |
12942 | break; | |
12943 | } | |
12944 | continue; | |
12945 | ||
12946 | case DT_INIT: | |
12947 | name = info->init_function; | |
12948 | goto get_sym; | |
12949 | case DT_FINI: | |
12950 | name = info->fini_function; | |
12951 | get_sym: | |
12952 | { | |
12953 | struct elf_link_hash_entry *h; | |
12954 | ||
0a1b45a2 | 12955 | h = elf_link_hash_lookup (htab, name, false, false, true); |
c152c796 AM |
12956 | if (h != NULL |
12957 | && (h->root.type == bfd_link_hash_defined | |
12958 | || h->root.type == bfd_link_hash_defweak)) | |
12959 | { | |
bef26483 | 12960 | dyn.d_un.d_ptr = h->root.u.def.value; |
c152c796 AM |
12961 | o = h->root.u.def.section; |
12962 | if (o->output_section != NULL) | |
bef26483 | 12963 | dyn.d_un.d_ptr += (o->output_section->vma |
c152c796 AM |
12964 | + o->output_offset); |
12965 | else | |
12966 | { | |
12967 | /* The symbol is imported from another shared | |
12968 | library and does not apply to this one. */ | |
bef26483 | 12969 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
12970 | } |
12971 | break; | |
12972 | } | |
12973 | } | |
12974 | continue; | |
12975 | ||
12976 | case DT_PREINIT_ARRAYSZ: | |
12977 | name = ".preinit_array"; | |
4ade44b7 | 12978 | goto get_out_size; |
c152c796 AM |
12979 | case DT_INIT_ARRAYSZ: |
12980 | name = ".init_array"; | |
4ade44b7 | 12981 | goto get_out_size; |
c152c796 AM |
12982 | case DT_FINI_ARRAYSZ: |
12983 | name = ".fini_array"; | |
4ade44b7 | 12984 | get_out_size: |
c152c796 AM |
12985 | o = bfd_get_section_by_name (abfd, name); |
12986 | if (o == NULL) | |
12987 | { | |
4eca0228 | 12988 | _bfd_error_handler |
4ade44b7 | 12989 | (_("could not find section %s"), name); |
c152c796 AM |
12990 | goto error_return; |
12991 | } | |
eea6121a | 12992 | if (o->size == 0) |
4eca0228 | 12993 | _bfd_error_handler |
c152c796 | 12994 | (_("warning: %s section has zero size"), name); |
eea6121a | 12995 | dyn.d_un.d_val = o->size; |
c152c796 AM |
12996 | break; |
12997 | ||
12998 | case DT_PREINIT_ARRAY: | |
12999 | name = ".preinit_array"; | |
4ade44b7 | 13000 | goto get_out_vma; |
c152c796 AM |
13001 | case DT_INIT_ARRAY: |
13002 | name = ".init_array"; | |
4ade44b7 | 13003 | goto get_out_vma; |
c152c796 AM |
13004 | case DT_FINI_ARRAY: |
13005 | name = ".fini_array"; | |
4ade44b7 AM |
13006 | get_out_vma: |
13007 | o = bfd_get_section_by_name (abfd, name); | |
13008 | goto do_vma; | |
c152c796 AM |
13009 | |
13010 | case DT_HASH: | |
13011 | name = ".hash"; | |
13012 | goto get_vma; | |
fdc90cb4 JJ |
13013 | case DT_GNU_HASH: |
13014 | name = ".gnu.hash"; | |
13015 | goto get_vma; | |
c152c796 AM |
13016 | case DT_STRTAB: |
13017 | name = ".dynstr"; | |
13018 | goto get_vma; | |
13019 | case DT_SYMTAB: | |
13020 | name = ".dynsym"; | |
13021 | goto get_vma; | |
13022 | case DT_VERDEF: | |
13023 | name = ".gnu.version_d"; | |
13024 | goto get_vma; | |
13025 | case DT_VERNEED: | |
13026 | name = ".gnu.version_r"; | |
13027 | goto get_vma; | |
13028 | case DT_VERSYM: | |
13029 | name = ".gnu.version"; | |
13030 | get_vma: | |
4ade44b7 AM |
13031 | o = bfd_get_linker_section (dynobj, name); |
13032 | do_vma: | |
b3293efa | 13033 | if (o == NULL || bfd_is_abs_section (o->output_section)) |
c152c796 | 13034 | { |
4eca0228 | 13035 | _bfd_error_handler |
4ade44b7 | 13036 | (_("could not find section %s"), name); |
c152c796 AM |
13037 | goto error_return; |
13038 | } | |
894891db NC |
13039 | if (elf_section_data (o->output_section)->this_hdr.sh_type == SHT_NOTE) |
13040 | { | |
4eca0228 | 13041 | _bfd_error_handler |
894891db NC |
13042 | (_("warning: section '%s' is being made into a note"), name); |
13043 | bfd_set_error (bfd_error_nonrepresentable_section); | |
13044 | goto error_return; | |
13045 | } | |
4ade44b7 | 13046 | dyn.d_un.d_ptr = o->output_section->vma + o->output_offset; |
c152c796 AM |
13047 | break; |
13048 | ||
13049 | case DT_REL: | |
13050 | case DT_RELA: | |
13051 | case DT_RELSZ: | |
13052 | case DT_RELASZ: | |
13053 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
13054 | type = SHT_REL; | |
13055 | else | |
13056 | type = SHT_RELA; | |
64487780 AM |
13057 | sh_size = 0; |
13058 | sh_addr = 0; | |
c152c796 AM |
13059 | for (i = 1; i < elf_numsections (abfd); i++) |
13060 | { | |
13061 | Elf_Internal_Shdr *hdr; | |
13062 | ||
13063 | hdr = elf_elfsections (abfd)[i]; | |
13064 | if (hdr->sh_type == type | |
13065 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
13066 | { | |
64487780 AM |
13067 | sh_size += hdr->sh_size; |
13068 | if (sh_addr == 0 | |
13069 | || sh_addr > hdr->sh_addr) | |
13070 | sh_addr = hdr->sh_addr; | |
c152c796 AM |
13071 | } |
13072 | } | |
64487780 | 13073 | |
64f52338 AM |
13074 | if (bed->dtrel_excludes_plt && htab->srelplt != NULL) |
13075 | { | |
66631823 CE |
13076 | unsigned int opb = bfd_octets_per_byte (abfd, o); |
13077 | ||
64f52338 AM |
13078 | /* Don't count procedure linkage table relocs in the |
13079 | overall reloc count. */ | |
64487780 AM |
13080 | sh_size -= htab->srelplt->size; |
13081 | if (sh_size == 0) | |
13082 | /* If the size is zero, make the address zero too. | |
13083 | This is to avoid a glibc bug. If the backend | |
13084 | emits DT_RELA/DT_RELASZ even when DT_RELASZ is | |
13085 | zero, then we'll put DT_RELA at the end of | |
13086 | DT_JMPREL. glibc will interpret the end of | |
13087 | DT_RELA matching the end of DT_JMPREL as the | |
13088 | case where DT_RELA includes DT_JMPREL, and for | |
13089 | LD_BIND_NOW will decide that processing DT_RELA | |
13090 | will process the PLT relocs too. Net result: | |
13091 | No PLT relocs applied. */ | |
13092 | sh_addr = 0; | |
13093 | ||
64f52338 AM |
13094 | /* If .rela.plt is the first .rela section, exclude |
13095 | it from DT_RELA. */ | |
64487780 | 13096 | else if (sh_addr == (htab->srelplt->output_section->vma |
66631823 | 13097 | + htab->srelplt->output_offset) * opb) |
64487780 | 13098 | sh_addr += htab->srelplt->size; |
64f52338 | 13099 | } |
64487780 AM |
13100 | |
13101 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
13102 | dyn.d_un.d_val = sh_size; | |
13103 | else | |
13104 | dyn.d_un.d_ptr = sh_addr; | |
c152c796 AM |
13105 | break; |
13106 | } | |
13107 | bed->s->swap_dyn_out (dynobj, &dyn, dyncon); | |
13108 | } | |
13109 | } | |
13110 | ||
13111 | /* If we have created any dynamic sections, then output them. */ | |
13112 | if (dynobj != NULL) | |
13113 | { | |
13114 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
13115 | goto error_return; | |
13116 | ||
943284cc | 13117 | /* Check for DT_TEXTREL (late, in case the backend removes it). */ |
a6dbf402 | 13118 | if (bfd_link_textrel_check (info) |
3d4d4302 | 13119 | && (o = bfd_get_linker_section (dynobj, ".dynamic")) != NULL) |
943284cc DJ |
13120 | { |
13121 | bfd_byte *dyncon, *dynconend; | |
13122 | ||
943284cc DJ |
13123 | dyncon = o->contents; |
13124 | dynconend = o->contents + o->size; | |
13125 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) | |
13126 | { | |
13127 | Elf_Internal_Dyn dyn; | |
13128 | ||
13129 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
13130 | ||
13131 | if (dyn.d_tag == DT_TEXTREL) | |
13132 | { | |
a6dbf402 | 13133 | if (info->textrel_check == textrel_check_error) |
c192a133 | 13134 | info->callbacks->einfo |
9793eb77 | 13135 | (_("%P%X: read-only segment has dynamic relocations\n")); |
a6dbf402 L |
13136 | else if (bfd_link_dll (info)) |
13137 | info->callbacks->einfo | |
13138 | (_("%P: warning: creating DT_TEXTREL in a shared object\n")); | |
c192a133 AM |
13139 | else |
13140 | info->callbacks->einfo | |
a6dbf402 | 13141 | (_("%P: warning: creating DT_TEXTREL in a PIE\n")); |
943284cc DJ |
13142 | break; |
13143 | } | |
13144 | } | |
13145 | } | |
13146 | ||
c152c796 AM |
13147 | for (o = dynobj->sections; o != NULL; o = o->next) |
13148 | { | |
13149 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
eea6121a | 13150 | || o->size == 0 |
c152c796 AM |
13151 | || o->output_section == bfd_abs_section_ptr) |
13152 | continue; | |
13153 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
13154 | { | |
13155 | /* At this point, we are only interested in sections | |
13156 | created by _bfd_elf_link_create_dynamic_sections. */ | |
13157 | continue; | |
13158 | } | |
64f52338 | 13159 | if (htab->stab_info.stabstr == o) |
3722b82f | 13160 | continue; |
64f52338 | 13161 | if (htab->eh_info.hdr_sec == o) |
eea6121a | 13162 | continue; |
3d4d4302 | 13163 | if (strcmp (o->name, ".dynstr") != 0) |
c152c796 | 13164 | { |
bb294208 AM |
13165 | bfd_size_type octets = ((file_ptr) o->output_offset |
13166 | * bfd_octets_per_byte (abfd, o)); | |
13167 | if (!bfd_set_section_contents (abfd, o->output_section, | |
13168 | o->contents, octets, o->size)) | |
c152c796 AM |
13169 | goto error_return; |
13170 | } | |
13171 | else | |
13172 | { | |
13173 | /* The contents of the .dynstr section are actually in a | |
13174 | stringtab. */ | |
8539e4e8 AM |
13175 | file_ptr off; |
13176 | ||
c152c796 AM |
13177 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; |
13178 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
64f52338 | 13179 | || !_bfd_elf_strtab_emit (abfd, htab->dynstr)) |
c152c796 AM |
13180 | goto error_return; |
13181 | } | |
13182 | } | |
13183 | } | |
13184 | ||
7bdf4127 | 13185 | if (!info->resolve_section_groups) |
c152c796 | 13186 | { |
0a1b45a2 | 13187 | bool failed = false; |
c152c796 | 13188 | |
7bdf4127 | 13189 | BFD_ASSERT (bfd_link_relocatable (info)); |
c152c796 AM |
13190 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); |
13191 | if (failed) | |
13192 | goto error_return; | |
13193 | } | |
13194 | ||
13195 | /* If we have optimized stabs strings, output them. */ | |
64f52338 | 13196 | if (htab->stab_info.stabstr != NULL) |
c152c796 | 13197 | { |
64f52338 | 13198 | if (!_bfd_write_stab_strings (abfd, &htab->stab_info)) |
c152c796 AM |
13199 | goto error_return; |
13200 | } | |
13201 | ||
9f7c3e5e AM |
13202 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) |
13203 | goto error_return; | |
c152c796 | 13204 | |
1ff6de03 NA |
13205 | if (info->callbacks->emit_ctf) |
13206 | info->callbacks->emit_ctf (); | |
13207 | ||
9f7c3e5e | 13208 | elf_final_link_free (abfd, &flinfo); |
c152c796 | 13209 | |
104d59d1 JM |
13210 | if (attr_section) |
13211 | { | |
a50b1753 | 13212 | bfd_byte *contents = (bfd_byte *) bfd_malloc (attr_size); |
104d59d1 | 13213 | if (contents == NULL) |
496afd17 L |
13214 | { |
13215 | /* Bail out and fail. */ | |
0a1b45a2 | 13216 | ret = false; |
496afd17 L |
13217 | goto return_local_hash_table; |
13218 | } | |
104d59d1 JM |
13219 | bfd_elf_set_obj_attr_contents (abfd, contents, attr_size); |
13220 | bfd_set_section_contents (abfd, attr_section, contents, 0, attr_size); | |
13221 | free (contents); | |
13222 | } | |
13223 | ||
496afd17 L |
13224 | return_local_hash_table: |
13225 | if (info->unique_symbol) | |
13226 | bfd_hash_table_free (&flinfo.local_hash_table); | |
13227 | return ret; | |
c152c796 AM |
13228 | |
13229 | error_return: | |
9f7c3e5e | 13230 | elf_final_link_free (abfd, &flinfo); |
0a1b45a2 | 13231 | ret = false; |
496afd17 | 13232 | goto return_local_hash_table; |
c152c796 AM |
13233 | } |
13234 | \f | |
5241d853 RS |
13235 | /* Initialize COOKIE for input bfd ABFD. */ |
13236 | ||
0a1b45a2 | 13237 | static bool |
5241d853 RS |
13238 | init_reloc_cookie (struct elf_reloc_cookie *cookie, |
13239 | struct bfd_link_info *info, bfd *abfd) | |
13240 | { | |
13241 | Elf_Internal_Shdr *symtab_hdr; | |
13242 | const struct elf_backend_data *bed; | |
13243 | ||
13244 | bed = get_elf_backend_data (abfd); | |
13245 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
13246 | ||
13247 | cookie->abfd = abfd; | |
13248 | cookie->sym_hashes = elf_sym_hashes (abfd); | |
13249 | cookie->bad_symtab = elf_bad_symtab (abfd); | |
13250 | if (cookie->bad_symtab) | |
13251 | { | |
13252 | cookie->locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
13253 | cookie->extsymoff = 0; | |
13254 | } | |
13255 | else | |
13256 | { | |
13257 | cookie->locsymcount = symtab_hdr->sh_info; | |
13258 | cookie->extsymoff = symtab_hdr->sh_info; | |
13259 | } | |
13260 | ||
13261 | if (bed->s->arch_size == 32) | |
13262 | cookie->r_sym_shift = 8; | |
13263 | else | |
13264 | cookie->r_sym_shift = 32; | |
13265 | ||
13266 | cookie->locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
13267 | if (cookie->locsyms == NULL && cookie->locsymcount != 0) | |
13268 | { | |
13269 | cookie->locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
13270 | cookie->locsymcount, 0, | |
13271 | NULL, NULL, NULL); | |
13272 | if (cookie->locsyms == NULL) | |
13273 | { | |
13274 | info->callbacks->einfo (_("%P%X: can not read symbols: %E\n")); | |
0a1b45a2 | 13275 | return false; |
5241d853 RS |
13276 | } |
13277 | if (info->keep_memory) | |
13278 | symtab_hdr->contents = (bfd_byte *) cookie->locsyms; | |
13279 | } | |
0a1b45a2 | 13280 | return true; |
5241d853 RS |
13281 | } |
13282 | ||
13283 | /* Free the memory allocated by init_reloc_cookie, if appropriate. */ | |
13284 | ||
13285 | static void | |
13286 | fini_reloc_cookie (struct elf_reloc_cookie *cookie, bfd *abfd) | |
13287 | { | |
13288 | Elf_Internal_Shdr *symtab_hdr; | |
13289 | ||
13290 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
c9594989 | 13291 | if (symtab_hdr->contents != (unsigned char *) cookie->locsyms) |
5241d853 RS |
13292 | free (cookie->locsyms); |
13293 | } | |
13294 | ||
13295 | /* Initialize the relocation information in COOKIE for input section SEC | |
13296 | of input bfd ABFD. */ | |
13297 | ||
0a1b45a2 | 13298 | static bool |
5241d853 RS |
13299 | init_reloc_cookie_rels (struct elf_reloc_cookie *cookie, |
13300 | struct bfd_link_info *info, bfd *abfd, | |
13301 | asection *sec) | |
13302 | { | |
5241d853 RS |
13303 | if (sec->reloc_count == 0) |
13304 | { | |
13305 | cookie->rels = NULL; | |
13306 | cookie->relend = NULL; | |
13307 | } | |
13308 | else | |
13309 | { | |
5241d853 RS |
13310 | cookie->rels = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, |
13311 | info->keep_memory); | |
13312 | if (cookie->rels == NULL) | |
0a1b45a2 | 13313 | return false; |
5241d853 | 13314 | cookie->rel = cookie->rels; |
056bafd4 | 13315 | cookie->relend = cookie->rels + sec->reloc_count; |
5241d853 RS |
13316 | } |
13317 | cookie->rel = cookie->rels; | |
0a1b45a2 | 13318 | return true; |
5241d853 RS |
13319 | } |
13320 | ||
13321 | /* Free the memory allocated by init_reloc_cookie_rels, | |
13322 | if appropriate. */ | |
13323 | ||
13324 | static void | |
13325 | fini_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
13326 | asection *sec) | |
13327 | { | |
c9594989 | 13328 | if (elf_section_data (sec)->relocs != cookie->rels) |
5241d853 RS |
13329 | free (cookie->rels); |
13330 | } | |
13331 | ||
13332 | /* Initialize the whole of COOKIE for input section SEC. */ | |
13333 | ||
0a1b45a2 | 13334 | static bool |
5241d853 RS |
13335 | init_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, |
13336 | struct bfd_link_info *info, | |
13337 | asection *sec) | |
13338 | { | |
13339 | if (!init_reloc_cookie (cookie, info, sec->owner)) | |
13340 | goto error1; | |
13341 | if (!init_reloc_cookie_rels (cookie, info, sec->owner, sec)) | |
13342 | goto error2; | |
0a1b45a2 | 13343 | return true; |
5241d853 RS |
13344 | |
13345 | error2: | |
13346 | fini_reloc_cookie (cookie, sec->owner); | |
13347 | error1: | |
0a1b45a2 | 13348 | return false; |
5241d853 RS |
13349 | } |
13350 | ||
13351 | /* Free the memory allocated by init_reloc_cookie_for_section, | |
13352 | if appropriate. */ | |
13353 | ||
13354 | static void | |
13355 | fini_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
13356 | asection *sec) | |
13357 | { | |
13358 | fini_reloc_cookie_rels (cookie, sec); | |
13359 | fini_reloc_cookie (cookie, sec->owner); | |
13360 | } | |
13361 | \f | |
c152c796 AM |
13362 | /* Garbage collect unused sections. */ |
13363 | ||
07adf181 AM |
13364 | /* Default gc_mark_hook. */ |
13365 | ||
13366 | asection * | |
13367 | _bfd_elf_gc_mark_hook (asection *sec, | |
13368 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
13369 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, | |
13370 | struct elf_link_hash_entry *h, | |
13371 | Elf_Internal_Sym *sym) | |
13372 | { | |
13373 | if (h != NULL) | |
13374 | { | |
13375 | switch (h->root.type) | |
13376 | { | |
13377 | case bfd_link_hash_defined: | |
13378 | case bfd_link_hash_defweak: | |
13379 | return h->root.u.def.section; | |
13380 | ||
13381 | case bfd_link_hash_common: | |
13382 | return h->root.u.c.p->section; | |
13383 | ||
13384 | default: | |
13385 | break; | |
13386 | } | |
13387 | } | |
13388 | else | |
13389 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
13390 | ||
13391 | return NULL; | |
13392 | } | |
13393 | ||
9e223787 | 13394 | /* Return the debug definition section. */ |
b7c871ed L |
13395 | |
13396 | static asection * | |
13397 | elf_gc_mark_debug_section (asection *sec ATTRIBUTE_UNUSED, | |
13398 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
13399 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, | |
13400 | struct elf_link_hash_entry *h, | |
9e223787 | 13401 | Elf_Internal_Sym *sym) |
b7c871ed | 13402 | { |
9e223787 L |
13403 | if (h != NULL) |
13404 | { | |
13405 | /* Return the global debug definition section. */ | |
13406 | if ((h->root.type == bfd_link_hash_defined | |
13407 | || h->root.type == bfd_link_hash_defweak) | |
13408 | && (h->root.u.def.section->flags & SEC_DEBUGGING) != 0) | |
13409 | return h->root.u.def.section; | |
13410 | } | |
13411 | else | |
13412 | { | |
13413 | /* Return the local debug definition section. */ | |
13414 | asection *isec = bfd_section_from_elf_index (sec->owner, | |
13415 | sym->st_shndx); | |
13416 | if ((isec->flags & SEC_DEBUGGING) != 0) | |
13417 | return isec; | |
13418 | } | |
b7c871ed L |
13419 | |
13420 | return NULL; | |
13421 | } | |
13422 | ||
5241d853 RS |
13423 | /* COOKIE->rel describes a relocation against section SEC, which is |
13424 | a section we've decided to keep. Return the section that contains | |
13425 | the relocation symbol, or NULL if no section contains it. */ | |
13426 | ||
13427 | asection * | |
13428 | _bfd_elf_gc_mark_rsec (struct bfd_link_info *info, asection *sec, | |
13429 | elf_gc_mark_hook_fn gc_mark_hook, | |
1cce69b9 | 13430 | struct elf_reloc_cookie *cookie, |
0a1b45a2 | 13431 | bool *start_stop) |
5241d853 RS |
13432 | { |
13433 | unsigned long r_symndx; | |
3024a17a | 13434 | struct elf_link_hash_entry *h, *hw; |
5241d853 RS |
13435 | |
13436 | r_symndx = cookie->rel->r_info >> cookie->r_sym_shift; | |
cf35638d | 13437 | if (r_symndx == STN_UNDEF) |
5241d853 RS |
13438 | return NULL; |
13439 | ||
13440 | if (r_symndx >= cookie->locsymcount | |
13441 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
13442 | { | |
0a1b45a2 | 13443 | bool was_marked; |
5789f845 | 13444 | |
5241d853 | 13445 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; |
263ddf68 L |
13446 | if (h == NULL) |
13447 | { | |
871b3ab2 | 13448 | info->callbacks->einfo (_("%F%P: corrupt input: %pB\n"), |
263ddf68 L |
13449 | sec->owner); |
13450 | return NULL; | |
13451 | } | |
5241d853 RS |
13452 | while (h->root.type == bfd_link_hash_indirect |
13453 | || h->root.type == bfd_link_hash_warning) | |
13454 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5789f845 AM |
13455 | |
13456 | was_marked = h->mark; | |
1d5316ab | 13457 | h->mark = 1; |
3024a17a AM |
13458 | /* Keep all aliases of the symbol too. If an object symbol |
13459 | needs to be copied into .dynbss then all of its aliases | |
13460 | should be present as dynamic symbols, not just the one used | |
13461 | on the copy relocation. */ | |
13462 | hw = h; | |
13463 | while (hw->is_weakalias) | |
13464 | { | |
13465 | hw = hw->u.alias; | |
13466 | hw->mark = 1; | |
13467 | } | |
1cce69b9 | 13468 | |
5789f845 | 13469 | if (!was_marked && h->start_stop && !h->root.ldscript_def) |
1cce69b9 | 13470 | { |
8ee10e86 AM |
13471 | if (info->start_stop_gc) |
13472 | return NULL; | |
13473 | ||
7dba9362 AM |
13474 | /* To work around a glibc bug, mark XXX input sections |
13475 | when there is a reference to __start_XXX or __stop_XXX | |
13476 | symbols. */ | |
8ee10e86 | 13477 | else if (start_stop != NULL) |
1cce69b9 | 13478 | { |
cbd0eecf | 13479 | asection *s = h->u2.start_stop_section; |
0a1b45a2 | 13480 | *start_stop = true; |
a6a4679f | 13481 | return s; |
1cce69b9 AM |
13482 | } |
13483 | } | |
13484 | ||
5241d853 RS |
13485 | return (*gc_mark_hook) (sec, info, cookie->rel, h, NULL); |
13486 | } | |
13487 | ||
13488 | return (*gc_mark_hook) (sec, info, cookie->rel, NULL, | |
13489 | &cookie->locsyms[r_symndx]); | |
13490 | } | |
13491 | ||
13492 | /* COOKIE->rel describes a relocation against section SEC, which is | |
13493 | a section we've decided to keep. Mark the section that contains | |
9d0a14d3 | 13494 | the relocation symbol. */ |
5241d853 | 13495 | |
0a1b45a2 | 13496 | bool |
5241d853 RS |
13497 | _bfd_elf_gc_mark_reloc (struct bfd_link_info *info, |
13498 | asection *sec, | |
13499 | elf_gc_mark_hook_fn gc_mark_hook, | |
9d0a14d3 | 13500 | struct elf_reloc_cookie *cookie) |
5241d853 RS |
13501 | { |
13502 | asection *rsec; | |
0a1b45a2 | 13503 | bool start_stop = false; |
5241d853 | 13504 | |
1cce69b9 AM |
13505 | rsec = _bfd_elf_gc_mark_rsec (info, sec, gc_mark_hook, cookie, &start_stop); |
13506 | while (rsec != NULL) | |
5241d853 | 13507 | { |
1cce69b9 AM |
13508 | if (!rsec->gc_mark) |
13509 | { | |
13510 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour | |
13511 | || (rsec->owner->flags & DYNAMIC) != 0) | |
13512 | rsec->gc_mark = 1; | |
13513 | else if (!_bfd_elf_gc_mark (info, rsec, gc_mark_hook)) | |
0a1b45a2 | 13514 | return false; |
1cce69b9 AM |
13515 | } |
13516 | if (!start_stop) | |
13517 | break; | |
199af150 | 13518 | rsec = bfd_get_next_section_by_name (rsec->owner, rsec); |
5241d853 | 13519 | } |
0a1b45a2 | 13520 | return true; |
5241d853 RS |
13521 | } |
13522 | ||
07adf181 AM |
13523 | /* The mark phase of garbage collection. For a given section, mark |
13524 | it and any sections in this section's group, and all the sections | |
13525 | which define symbols to which it refers. */ | |
13526 | ||
0a1b45a2 | 13527 | bool |
ccfa59ea AM |
13528 | _bfd_elf_gc_mark (struct bfd_link_info *info, |
13529 | asection *sec, | |
6a5bb875 | 13530 | elf_gc_mark_hook_fn gc_mark_hook) |
c152c796 | 13531 | { |
0a1b45a2 | 13532 | bool ret; |
9d0a14d3 | 13533 | asection *group_sec, *eh_frame; |
c152c796 AM |
13534 | |
13535 | sec->gc_mark = 1; | |
13536 | ||
13537 | /* Mark all the sections in the group. */ | |
13538 | group_sec = elf_section_data (sec)->next_in_group; | |
13539 | if (group_sec && !group_sec->gc_mark) | |
ccfa59ea | 13540 | if (!_bfd_elf_gc_mark (info, group_sec, gc_mark_hook)) |
0a1b45a2 | 13541 | return false; |
c152c796 AM |
13542 | |
13543 | /* Look through the section relocs. */ | |
0a1b45a2 | 13544 | ret = true; |
9d0a14d3 RS |
13545 | eh_frame = elf_eh_frame_section (sec->owner); |
13546 | if ((sec->flags & SEC_RELOC) != 0 | |
13547 | && sec->reloc_count > 0 | |
13548 | && sec != eh_frame) | |
c152c796 | 13549 | { |
5241d853 | 13550 | struct elf_reloc_cookie cookie; |
c152c796 | 13551 | |
5241d853 | 13552 | if (!init_reloc_cookie_for_section (&cookie, info, sec)) |
0a1b45a2 | 13553 | ret = false; |
c152c796 | 13554 | else |
c152c796 | 13555 | { |
5241d853 | 13556 | for (; cookie.rel < cookie.relend; cookie.rel++) |
9d0a14d3 | 13557 | if (!_bfd_elf_gc_mark_reloc (info, sec, gc_mark_hook, &cookie)) |
5241d853 | 13558 | { |
0a1b45a2 | 13559 | ret = false; |
5241d853 RS |
13560 | break; |
13561 | } | |
13562 | fini_reloc_cookie_for_section (&cookie, sec); | |
c152c796 AM |
13563 | } |
13564 | } | |
9d0a14d3 RS |
13565 | |
13566 | if (ret && eh_frame && elf_fde_list (sec)) | |
13567 | { | |
13568 | struct elf_reloc_cookie cookie; | |
13569 | ||
13570 | if (!init_reloc_cookie_for_section (&cookie, info, eh_frame)) | |
0a1b45a2 | 13571 | ret = false; |
9d0a14d3 RS |
13572 | else |
13573 | { | |
13574 | if (!_bfd_elf_gc_mark_fdes (info, sec, eh_frame, | |
13575 | gc_mark_hook, &cookie)) | |
0a1b45a2 | 13576 | ret = false; |
9d0a14d3 RS |
13577 | fini_reloc_cookie_for_section (&cookie, eh_frame); |
13578 | } | |
13579 | } | |
13580 | ||
2f0c68f2 CM |
13581 | eh_frame = elf_section_eh_frame_entry (sec); |
13582 | if (ret && eh_frame && !eh_frame->gc_mark) | |
13583 | if (!_bfd_elf_gc_mark (info, eh_frame, gc_mark_hook)) | |
0a1b45a2 | 13584 | ret = false; |
2f0c68f2 | 13585 | |
c152c796 AM |
13586 | return ret; |
13587 | } | |
13588 | ||
3c758495 TG |
13589 | /* Scan and mark sections in a special or debug section group. */ |
13590 | ||
13591 | static void | |
13592 | _bfd_elf_gc_mark_debug_special_section_group (asection *grp) | |
13593 | { | |
13594 | /* Point to first section of section group. */ | |
13595 | asection *ssec; | |
13596 | /* Used to iterate the section group. */ | |
13597 | asection *msec; | |
13598 | ||
0a1b45a2 AM |
13599 | bool is_special_grp = true; |
13600 | bool is_debug_grp = true; | |
3c758495 TG |
13601 | |
13602 | /* First scan to see if group contains any section other than debug | |
13603 | and special section. */ | |
13604 | ssec = msec = elf_next_in_group (grp); | |
13605 | do | |
13606 | { | |
13607 | if ((msec->flags & SEC_DEBUGGING) == 0) | |
0a1b45a2 | 13608 | is_debug_grp = false; |
3c758495 TG |
13609 | |
13610 | if ((msec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) != 0) | |
0a1b45a2 | 13611 | is_special_grp = false; |
3c758495 TG |
13612 | |
13613 | msec = elf_next_in_group (msec); | |
13614 | } | |
13615 | while (msec != ssec); | |
13616 | ||
13617 | /* If this is a pure debug section group or pure special section group, | |
13618 | keep all sections in this group. */ | |
13619 | if (is_debug_grp || is_special_grp) | |
13620 | { | |
13621 | do | |
13622 | { | |
13623 | msec->gc_mark = 1; | |
13624 | msec = elf_next_in_group (msec); | |
13625 | } | |
13626 | while (msec != ssec); | |
13627 | } | |
13628 | } | |
13629 | ||
7f6ab9f8 AM |
13630 | /* Keep debug and special sections. */ |
13631 | ||
0a1b45a2 | 13632 | bool |
7f6ab9f8 | 13633 | _bfd_elf_gc_mark_extra_sections (struct bfd_link_info *info, |
b7d07216 | 13634 | elf_gc_mark_hook_fn mark_hook) |
7f6ab9f8 AM |
13635 | { |
13636 | bfd *ibfd; | |
13637 | ||
c72f2fb2 | 13638 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
7f6ab9f8 AM |
13639 | { |
13640 | asection *isec; | |
0a1b45a2 AM |
13641 | bool some_kept; |
13642 | bool debug_frag_seen; | |
13643 | bool has_kept_debug_info; | |
7f6ab9f8 AM |
13644 | |
13645 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
13646 | continue; | |
57963c05 AM |
13647 | isec = ibfd->sections; |
13648 | if (isec == NULL || isec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
13649 | continue; | |
7f6ab9f8 | 13650 | |
b40bf0a2 NC |
13651 | /* Ensure all linker created sections are kept, |
13652 | see if any other section is already marked, | |
13653 | and note if we have any fragmented debug sections. */ | |
0a1b45a2 | 13654 | debug_frag_seen = some_kept = has_kept_debug_info = false; |
7f6ab9f8 AM |
13655 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
13656 | { | |
13657 | if ((isec->flags & SEC_LINKER_CREATED) != 0) | |
13658 | isec->gc_mark = 1; | |
eb026f09 AM |
13659 | else if (isec->gc_mark |
13660 | && (isec->flags & SEC_ALLOC) != 0 | |
13661 | && elf_section_type (isec) != SHT_NOTE) | |
0a1b45a2 | 13662 | some_kept = true; |
b7d07216 L |
13663 | else |
13664 | { | |
13665 | /* Since all sections, except for backend specific ones, | |
13666 | have been garbage collected, call mark_hook on this | |
13667 | section if any of its linked-to sections is marked. */ | |
def97fb9 AM |
13668 | asection *linked_to_sec; |
13669 | for (linked_to_sec = elf_linked_to_section (isec); | |
13670 | linked_to_sec != NULL && !linked_to_sec->linker_mark; | |
b7d07216 | 13671 | linked_to_sec = elf_linked_to_section (linked_to_sec)) |
def97fb9 AM |
13672 | { |
13673 | if (linked_to_sec->gc_mark) | |
13674 | { | |
13675 | if (!_bfd_elf_gc_mark (info, isec, mark_hook)) | |
0a1b45a2 | 13676 | return false; |
def97fb9 AM |
13677 | break; |
13678 | } | |
13679 | linked_to_sec->linker_mark = 1; | |
13680 | } | |
13681 | for (linked_to_sec = elf_linked_to_section (isec); | |
13682 | linked_to_sec != NULL && linked_to_sec->linker_mark; | |
13683 | linked_to_sec = elf_linked_to_section (linked_to_sec)) | |
13684 | linked_to_sec->linker_mark = 0; | |
b7d07216 | 13685 | } |
b40bf0a2 | 13686 | |
535b785f | 13687 | if (!debug_frag_seen |
b40bf0a2 | 13688 | && (isec->flags & SEC_DEBUGGING) |
08dedd66 | 13689 | && startswith (isec->name, ".debug_line.")) |
0a1b45a2 | 13690 | debug_frag_seen = true; |
5242a0a0 L |
13691 | else if (strcmp (bfd_section_name (isec), |
13692 | "__patchable_function_entries") == 0 | |
13693 | && elf_linked_to_section (isec) == NULL) | |
13694 | info->callbacks->einfo (_("%F%P: %pB(%pA): error: " | |
13695 | "need linked-to section " | |
13696 | "for --gc-sections\n"), | |
13697 | isec->owner, isec); | |
7f6ab9f8 AM |
13698 | } |
13699 | ||
eb026f09 AM |
13700 | /* If no non-note alloc section in this file will be kept, then |
13701 | we can toss out the debug and special sections. */ | |
7f6ab9f8 AM |
13702 | if (!some_kept) |
13703 | continue; | |
13704 | ||
13705 | /* Keep debug and special sections like .comment when they are | |
3c758495 | 13706 | not part of a group. Also keep section groups that contain |
b7d07216 L |
13707 | just debug sections or special sections. NB: Sections with |
13708 | linked-to section has been handled above. */ | |
7f6ab9f8 | 13709 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
3c758495 TG |
13710 | { |
13711 | if ((isec->flags & SEC_GROUP) != 0) | |
13712 | _bfd_elf_gc_mark_debug_special_section_group (isec); | |
13713 | else if (((isec->flags & SEC_DEBUGGING) != 0 | |
13714 | || (isec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0) | |
b7d07216 L |
13715 | && elf_next_in_group (isec) == NULL |
13716 | && elf_linked_to_section (isec) == NULL) | |
3c758495 | 13717 | isec->gc_mark = 1; |
b7c871ed | 13718 | if (isec->gc_mark && (isec->flags & SEC_DEBUGGING) != 0) |
0a1b45a2 | 13719 | has_kept_debug_info = true; |
3c758495 | 13720 | } |
b40bf0a2 | 13721 | |
b40bf0a2 NC |
13722 | /* Look for CODE sections which are going to be discarded, |
13723 | and find and discard any fragmented debug sections which | |
13724 | are associated with that code section. */ | |
b7c871ed L |
13725 | if (debug_frag_seen) |
13726 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) | |
13727 | if ((isec->flags & SEC_CODE) != 0 | |
13728 | && isec->gc_mark == 0) | |
13729 | { | |
13730 | unsigned int ilen; | |
13731 | asection *dsec; | |
b40bf0a2 | 13732 | |
b7c871ed | 13733 | ilen = strlen (isec->name); |
b40bf0a2 | 13734 | |
b7c871ed | 13735 | /* Association is determined by the name of the debug |
07d6d2b8 | 13736 | section containing the name of the code section as |
b7c871ed L |
13737 | a suffix. For example .debug_line.text.foo is a |
13738 | debug section associated with .text.foo. */ | |
13739 | for (dsec = ibfd->sections; dsec != NULL; dsec = dsec->next) | |
13740 | { | |
13741 | unsigned int dlen; | |
b40bf0a2 | 13742 | |
b7c871ed L |
13743 | if (dsec->gc_mark == 0 |
13744 | || (dsec->flags & SEC_DEBUGGING) == 0) | |
13745 | continue; | |
b40bf0a2 | 13746 | |
b7c871ed | 13747 | dlen = strlen (dsec->name); |
b40bf0a2 | 13748 | |
b7c871ed L |
13749 | if (dlen > ilen |
13750 | && strncmp (dsec->name + (dlen - ilen), | |
13751 | isec->name, ilen) == 0) | |
b40bf0a2 | 13752 | dsec->gc_mark = 0; |
b7c871ed | 13753 | } |
b40bf0a2 | 13754 | } |
b7c871ed L |
13755 | |
13756 | /* Mark debug sections referenced by kept debug sections. */ | |
13757 | if (has_kept_debug_info) | |
13758 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) | |
13759 | if (isec->gc_mark | |
13760 | && (isec->flags & SEC_DEBUGGING) != 0) | |
13761 | if (!_bfd_elf_gc_mark (info, isec, | |
13762 | elf_gc_mark_debug_section)) | |
0a1b45a2 | 13763 | return false; |
7f6ab9f8 | 13764 | } |
0a1b45a2 | 13765 | return true; |
7f6ab9f8 AM |
13766 | } |
13767 | ||
0a1b45a2 | 13768 | static bool |
ccabcbe5 | 13769 | elf_gc_sweep (bfd *abfd, struct bfd_link_info *info) |
c152c796 AM |
13770 | { |
13771 | bfd *sub; | |
ccabcbe5 | 13772 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
c152c796 | 13773 | |
c72f2fb2 | 13774 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
13775 | { |
13776 | asection *o; | |
13777 | ||
b19a8f85 | 13778 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour |
81742b83 | 13779 | || elf_object_id (sub) != elf_hash_table_id (elf_hash_table (info)) |
b19a8f85 | 13780 | || !(*bed->relocs_compatible) (sub->xvec, abfd->xvec)) |
c152c796 | 13781 | continue; |
57963c05 AM |
13782 | o = sub->sections; |
13783 | if (o == NULL || o->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
13784 | continue; | |
c152c796 AM |
13785 | |
13786 | for (o = sub->sections; o != NULL; o = o->next) | |
13787 | { | |
a33dafc3 L |
13788 | /* When any section in a section group is kept, we keep all |
13789 | sections in the section group. If the first member of | |
13790 | the section group is excluded, we will also exclude the | |
13791 | group section. */ | |
13792 | if (o->flags & SEC_GROUP) | |
13793 | { | |
13794 | asection *first = elf_next_in_group (o); | |
13795 | o->gc_mark = first->gc_mark; | |
13796 | } | |
c152c796 | 13797 | |
1e7eae0d | 13798 | if (o->gc_mark) |
c152c796 AM |
13799 | continue; |
13800 | ||
13801 | /* Skip sweeping sections already excluded. */ | |
13802 | if (o->flags & SEC_EXCLUDE) | |
13803 | continue; | |
13804 | ||
13805 | /* Since this is early in the link process, it is simple | |
13806 | to remove a section from the output. */ | |
13807 | o->flags |= SEC_EXCLUDE; | |
13808 | ||
c55fe096 | 13809 | if (info->print_gc_sections && o->size != 0) |
695344c0 | 13810 | /* xgettext:c-format */ |
9793eb77 | 13811 | _bfd_error_handler (_("removing unused section '%pA' in file '%pB'"), |
c08bb8dd | 13812 | o, sub); |
c152c796 AM |
13813 | } |
13814 | } | |
13815 | ||
0a1b45a2 | 13816 | return true; |
c152c796 AM |
13817 | } |
13818 | ||
13819 | /* Propagate collected vtable information. This is called through | |
13820 | elf_link_hash_traverse. */ | |
13821 | ||
0a1b45a2 | 13822 | static bool |
c152c796 AM |
13823 | elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry *h, void *okp) |
13824 | { | |
c152c796 | 13825 | /* Those that are not vtables. */ |
cbd0eecf L |
13826 | if (h->start_stop |
13827 | || h->u2.vtable == NULL | |
13828 | || h->u2.vtable->parent == NULL) | |
0a1b45a2 | 13829 | return true; |
c152c796 AM |
13830 | |
13831 | /* Those vtables that do not have parents, we cannot merge. */ | |
cbd0eecf | 13832 | if (h->u2.vtable->parent == (struct elf_link_hash_entry *) -1) |
0a1b45a2 | 13833 | return true; |
c152c796 AM |
13834 | |
13835 | /* If we've already been done, exit. */ | |
cbd0eecf | 13836 | if (h->u2.vtable->used && h->u2.vtable->used[-1]) |
0a1b45a2 | 13837 | return true; |
c152c796 AM |
13838 | |
13839 | /* Make sure the parent's table is up to date. */ | |
cbd0eecf | 13840 | elf_gc_propagate_vtable_entries_used (h->u2.vtable->parent, okp); |
c152c796 | 13841 | |
cbd0eecf | 13842 | if (h->u2.vtable->used == NULL) |
c152c796 AM |
13843 | { |
13844 | /* None of this table's entries were referenced. Re-use the | |
13845 | parent's table. */ | |
cbd0eecf L |
13846 | h->u2.vtable->used = h->u2.vtable->parent->u2.vtable->used; |
13847 | h->u2.vtable->size = h->u2.vtable->parent->u2.vtable->size; | |
c152c796 AM |
13848 | } |
13849 | else | |
13850 | { | |
13851 | size_t n; | |
0a1b45a2 | 13852 | bool *cu, *pu; |
c152c796 AM |
13853 | |
13854 | /* Or the parent's entries into ours. */ | |
cbd0eecf | 13855 | cu = h->u2.vtable->used; |
0a1b45a2 | 13856 | cu[-1] = true; |
cbd0eecf | 13857 | pu = h->u2.vtable->parent->u2.vtable->used; |
c152c796 AM |
13858 | if (pu != NULL) |
13859 | { | |
13860 | const struct elf_backend_data *bed; | |
13861 | unsigned int log_file_align; | |
13862 | ||
13863 | bed = get_elf_backend_data (h->root.u.def.section->owner); | |
13864 | log_file_align = bed->s->log_file_align; | |
cbd0eecf | 13865 | n = h->u2.vtable->parent->u2.vtable->size >> log_file_align; |
c152c796 AM |
13866 | while (n--) |
13867 | { | |
13868 | if (*pu) | |
0a1b45a2 | 13869 | *cu = true; |
c152c796 AM |
13870 | pu++; |
13871 | cu++; | |
13872 | } | |
13873 | } | |
13874 | } | |
13875 | ||
0a1b45a2 | 13876 | return true; |
c152c796 AM |
13877 | } |
13878 | ||
0a1b45a2 | 13879 | static bool |
c152c796 AM |
13880 | elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry *h, void *okp) |
13881 | { | |
13882 | asection *sec; | |
13883 | bfd_vma hstart, hend; | |
13884 | Elf_Internal_Rela *relstart, *relend, *rel; | |
13885 | const struct elf_backend_data *bed; | |
13886 | unsigned int log_file_align; | |
13887 | ||
c152c796 AM |
13888 | /* Take care of both those symbols that do not describe vtables as |
13889 | well as those that are not loaded. */ | |
cbd0eecf L |
13890 | if (h->start_stop |
13891 | || h->u2.vtable == NULL | |
13892 | || h->u2.vtable->parent == NULL) | |
0a1b45a2 | 13893 | return true; |
c152c796 AM |
13894 | |
13895 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
13896 | || h->root.type == bfd_link_hash_defweak); | |
13897 | ||
13898 | sec = h->root.u.def.section; | |
13899 | hstart = h->root.u.def.value; | |
13900 | hend = hstart + h->size; | |
13901 | ||
0a1b45a2 | 13902 | relstart = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL, true); |
c152c796 | 13903 | if (!relstart) |
0a1b45a2 | 13904 | return *(bool *) okp = false; |
c152c796 AM |
13905 | bed = get_elf_backend_data (sec->owner); |
13906 | log_file_align = bed->s->log_file_align; | |
13907 | ||
056bafd4 | 13908 | relend = relstart + sec->reloc_count; |
c152c796 AM |
13909 | |
13910 | for (rel = relstart; rel < relend; ++rel) | |
13911 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
13912 | { | |
13913 | /* If the entry is in use, do nothing. */ | |
cbd0eecf L |
13914 | if (h->u2.vtable->used |
13915 | && (rel->r_offset - hstart) < h->u2.vtable->size) | |
c152c796 AM |
13916 | { |
13917 | bfd_vma entry = (rel->r_offset - hstart) >> log_file_align; | |
cbd0eecf | 13918 | if (h->u2.vtable->used[entry]) |
c152c796 AM |
13919 | continue; |
13920 | } | |
13921 | /* Otherwise, kill it. */ | |
13922 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
13923 | } | |
13924 | ||
0a1b45a2 | 13925 | return true; |
c152c796 AM |
13926 | } |
13927 | ||
87538722 AM |
13928 | /* Mark sections containing dynamically referenced symbols. When |
13929 | building shared libraries, we must assume that any visible symbol is | |
13930 | referenced. */ | |
715df9b8 | 13931 | |
0a1b45a2 | 13932 | bool |
64d03ab5 | 13933 | bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry *h, void *inf) |
715df9b8 | 13934 | { |
87538722 | 13935 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
d6f6f455 | 13936 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
87538722 | 13937 | |
715df9b8 EB |
13938 | if ((h->root.type == bfd_link_hash_defined |
13939 | || h->root.type == bfd_link_hash_defweak) | |
8ee10e86 AM |
13940 | && (!h->start_stop |
13941 | || h->root.ldscript_def | |
13942 | || !info->start_stop_gc) | |
d664fd41 | 13943 | && ((h->ref_dynamic && !h->forced_local) |
c4621b33 | 13944 | || ((h->def_regular || ELF_COMMON_DEF_P (h)) |
87538722 | 13945 | && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL |
fd91d419 | 13946 | && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN |
0e1862bb | 13947 | && (!bfd_link_executable (info) |
22185505 | 13948 | || info->gc_keep_exported |
b407645f AM |
13949 | || info->export_dynamic |
13950 | || (h->dynamic | |
13951 | && d != NULL | |
13952 | && (*d->match) (&d->head, NULL, h->root.root.string))) | |
422f1182 | 13953 | && (h->versioned >= versioned |
54e8959c L |
13954 | || !bfd_hide_sym_by_version (info->version_info, |
13955 | h->root.root.string))))) | |
715df9b8 EB |
13956 | h->root.u.def.section->flags |= SEC_KEEP; |
13957 | ||
0a1b45a2 | 13958 | return true; |
715df9b8 | 13959 | } |
3b36f7e6 | 13960 | |
74f0fb50 AM |
13961 | /* Keep all sections containing symbols undefined on the command-line, |
13962 | and the section containing the entry symbol. */ | |
13963 | ||
13964 | void | |
13965 | _bfd_elf_gc_keep (struct bfd_link_info *info) | |
13966 | { | |
13967 | struct bfd_sym_chain *sym; | |
13968 | ||
13969 | for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) | |
13970 | { | |
13971 | struct elf_link_hash_entry *h; | |
13972 | ||
13973 | h = elf_link_hash_lookup (elf_hash_table (info), sym->name, | |
0a1b45a2 | 13974 | false, false, false); |
74f0fb50 AM |
13975 | |
13976 | if (h != NULL | |
13977 | && (h->root.type == bfd_link_hash_defined | |
13978 | || h->root.type == bfd_link_hash_defweak) | |
2f5541f3 | 13979 | && !bfd_is_const_section (h->root.u.def.section)) |
74f0fb50 AM |
13980 | h->root.u.def.section->flags |= SEC_KEEP; |
13981 | } | |
13982 | } | |
13983 | ||
0a1b45a2 | 13984 | bool |
2f0c68f2 CM |
13985 | bfd_elf_parse_eh_frame_entries (bfd *abfd ATTRIBUTE_UNUSED, |
13986 | struct bfd_link_info *info) | |
13987 | { | |
13988 | bfd *ibfd = info->input_bfds; | |
13989 | ||
13990 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
13991 | { | |
13992 | asection *sec; | |
13993 | struct elf_reloc_cookie cookie; | |
13994 | ||
13995 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
13996 | continue; | |
57963c05 AM |
13997 | sec = ibfd->sections; |
13998 | if (sec == NULL || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
13999 | continue; | |
2f0c68f2 CM |
14000 | |
14001 | if (!init_reloc_cookie (&cookie, info, ibfd)) | |
0a1b45a2 | 14002 | return false; |
2f0c68f2 CM |
14003 | |
14004 | for (sec = ibfd->sections; sec; sec = sec->next) | |
14005 | { | |
08dedd66 | 14006 | if (startswith (bfd_section_name (sec), ".eh_frame_entry") |
2f0c68f2 CM |
14007 | && init_reloc_cookie_rels (&cookie, info, ibfd, sec)) |
14008 | { | |
14009 | _bfd_elf_parse_eh_frame_entry (info, sec, &cookie); | |
14010 | fini_reloc_cookie_rels (&cookie, sec); | |
14011 | } | |
14012 | } | |
14013 | } | |
0a1b45a2 | 14014 | return true; |
2f0c68f2 CM |
14015 | } |
14016 | ||
c152c796 AM |
14017 | /* Do mark and sweep of unused sections. */ |
14018 | ||
0a1b45a2 | 14019 | bool |
c152c796 AM |
14020 | bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info) |
14021 | { | |
0a1b45a2 | 14022 | bool ok = true; |
c152c796 | 14023 | bfd *sub; |
6a5bb875 | 14024 | elf_gc_mark_hook_fn gc_mark_hook; |
64d03ab5 | 14025 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
da44f4e5 | 14026 | struct elf_link_hash_table *htab; |
c152c796 | 14027 | |
64d03ab5 | 14028 | if (!bed->can_gc_sections |
715df9b8 | 14029 | || !is_elf_hash_table (info->hash)) |
c152c796 | 14030 | { |
9793eb77 | 14031 | _bfd_error_handler(_("warning: gc-sections option ignored")); |
0a1b45a2 | 14032 | return true; |
c152c796 AM |
14033 | } |
14034 | ||
74f0fb50 | 14035 | bed->gc_keep (info); |
da44f4e5 | 14036 | htab = elf_hash_table (info); |
74f0fb50 | 14037 | |
9d0a14d3 RS |
14038 | /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section |
14039 | at the .eh_frame section if we can mark the FDEs individually. */ | |
2f0c68f2 CM |
14040 | for (sub = info->input_bfds; |
14041 | info->eh_frame_hdr_type != COMPACT_EH_HDR && sub != NULL; | |
14042 | sub = sub->link.next) | |
9d0a14d3 RS |
14043 | { |
14044 | asection *sec; | |
14045 | struct elf_reloc_cookie cookie; | |
14046 | ||
57963c05 AM |
14047 | sec = sub->sections; |
14048 | if (sec == NULL || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
14049 | continue; | |
9d0a14d3 | 14050 | sec = bfd_get_section_by_name (sub, ".eh_frame"); |
9a2a56cc | 14051 | while (sec && init_reloc_cookie_for_section (&cookie, info, sec)) |
9d0a14d3 RS |
14052 | { |
14053 | _bfd_elf_parse_eh_frame (sub, info, sec, &cookie); | |
9a2a56cc AM |
14054 | if (elf_section_data (sec)->sec_info |
14055 | && (sec->flags & SEC_LINKER_CREATED) == 0) | |
9d0a14d3 RS |
14056 | elf_eh_frame_section (sub) = sec; |
14057 | fini_reloc_cookie_for_section (&cookie, sec); | |
199af150 | 14058 | sec = bfd_get_next_section_by_name (NULL, sec); |
9d0a14d3 RS |
14059 | } |
14060 | } | |
9d0a14d3 | 14061 | |
c152c796 | 14062 | /* Apply transitive closure to the vtable entry usage info. */ |
da44f4e5 | 14063 | elf_link_hash_traverse (htab, elf_gc_propagate_vtable_entries_used, &ok); |
c152c796 | 14064 | if (!ok) |
0a1b45a2 | 14065 | return false; |
c152c796 AM |
14066 | |
14067 | /* Kill the vtable relocations that were not used. */ | |
da44f4e5 | 14068 | elf_link_hash_traverse (htab, elf_gc_smash_unused_vtentry_relocs, &ok); |
c152c796 | 14069 | if (!ok) |
0a1b45a2 | 14070 | return false; |
c152c796 | 14071 | |
715df9b8 | 14072 | /* Mark dynamically referenced symbols. */ |
22185505 | 14073 | if (htab->dynamic_sections_created || info->gc_keep_exported) |
da44f4e5 | 14074 | elf_link_hash_traverse (htab, bed->gc_mark_dynamic_ref, info); |
c152c796 | 14075 | |
715df9b8 | 14076 | /* Grovel through relocs to find out who stays ... */ |
64d03ab5 | 14077 | gc_mark_hook = bed->gc_mark_hook; |
c72f2fb2 | 14078 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
14079 | { |
14080 | asection *o; | |
14081 | ||
b19a8f85 | 14082 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour |
81742b83 | 14083 | || elf_object_id (sub) != elf_hash_table_id (htab) |
b19a8f85 | 14084 | || !(*bed->relocs_compatible) (sub->xvec, abfd->xvec)) |
c152c796 AM |
14085 | continue; |
14086 | ||
57963c05 AM |
14087 | o = sub->sections; |
14088 | if (o == NULL || o->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
14089 | continue; | |
14090 | ||
7f6ab9f8 AM |
14091 | /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep). |
14092 | Also treat note sections as a root, if the section is not part | |
8b6f4cd3 L |
14093 | of a group. We must keep all PREINIT_ARRAY, INIT_ARRAY as |
14094 | well as FINI_ARRAY sections for ld -r. */ | |
c152c796 | 14095 | for (o = sub->sections; o != NULL; o = o->next) |
7f6ab9f8 AM |
14096 | if (!o->gc_mark |
14097 | && (o->flags & SEC_EXCLUDE) == 0 | |
24007750 | 14098 | && ((o->flags & SEC_KEEP) != 0 |
8b6f4cd3 L |
14099 | || (bfd_link_relocatable (info) |
14100 | && ((elf_section_data (o)->this_hdr.sh_type | |
14101 | == SHT_PREINIT_ARRAY) | |
14102 | || (elf_section_data (o)->this_hdr.sh_type | |
14103 | == SHT_INIT_ARRAY) | |
14104 | || (elf_section_data (o)->this_hdr.sh_type | |
14105 | == SHT_FINI_ARRAY))) | |
7f6ab9f8 | 14106 | || (elf_section_data (o)->this_hdr.sh_type == SHT_NOTE |
7026832e | 14107 | && elf_next_in_group (o) == NULL |
99fabbc9 JL |
14108 | && elf_linked_to_section (o) == NULL) |
14109 | || ((elf_tdata (sub)->has_gnu_osabi & elf_gnu_osabi_retain) | |
14110 | && (elf_section_flags (o) & SHF_GNU_RETAIN)))) | |
7f6ab9f8 AM |
14111 | { |
14112 | if (!_bfd_elf_gc_mark (info, o, gc_mark_hook)) | |
0a1b45a2 | 14113 | return false; |
7f6ab9f8 | 14114 | } |
c152c796 AM |
14115 | } |
14116 | ||
6a5bb875 | 14117 | /* Allow the backend to mark additional target specific sections. */ |
7f6ab9f8 | 14118 | bed->gc_mark_extra_sections (info, gc_mark_hook); |
6a5bb875 | 14119 | |
c152c796 | 14120 | /* ... and mark SEC_EXCLUDE for those that go. */ |
ccabcbe5 | 14121 | return elf_gc_sweep (abfd, info); |
c152c796 AM |
14122 | } |
14123 | \f | |
14124 | /* Called from check_relocs to record the existence of a VTINHERIT reloc. */ | |
14125 | ||
0a1b45a2 | 14126 | bool |
c152c796 AM |
14127 | bfd_elf_gc_record_vtinherit (bfd *abfd, |
14128 | asection *sec, | |
14129 | struct elf_link_hash_entry *h, | |
14130 | bfd_vma offset) | |
14131 | { | |
14132 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
14133 | struct elf_link_hash_entry **search, *child; | |
ef53be89 | 14134 | size_t extsymcount; |
c152c796 AM |
14135 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
14136 | ||
14137 | /* The sh_info field of the symtab header tells us where the | |
14138 | external symbols start. We don't care about the local symbols at | |
14139 | this point. */ | |
14140 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size / bed->s->sizeof_sym; | |
14141 | if (!elf_bad_symtab (abfd)) | |
14142 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
14143 | ||
14144 | sym_hashes = elf_sym_hashes (abfd); | |
14145 | sym_hashes_end = sym_hashes + extsymcount; | |
14146 | ||
14147 | /* Hunt down the child symbol, which is in this section at the same | |
14148 | offset as the relocation. */ | |
14149 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
14150 | { | |
14151 | if ((child = *search) != NULL | |
14152 | && (child->root.type == bfd_link_hash_defined | |
14153 | || child->root.type == bfd_link_hash_defweak) | |
14154 | && child->root.u.def.section == sec | |
14155 | && child->root.u.def.value == offset) | |
14156 | goto win; | |
14157 | } | |
14158 | ||
695344c0 | 14159 | /* xgettext:c-format */ |
9793eb77 | 14160 | _bfd_error_handler (_("%pB: %pA+%#" PRIx64 ": no symbol found for INHERIT"), |
2dcf00ce | 14161 | abfd, sec, (uint64_t) offset); |
c152c796 | 14162 | bfd_set_error (bfd_error_invalid_operation); |
0a1b45a2 | 14163 | return false; |
c152c796 AM |
14164 | |
14165 | win: | |
cbd0eecf | 14166 | if (!child->u2.vtable) |
f6e332e6 | 14167 | { |
cbd0eecf L |
14168 | child->u2.vtable = ((struct elf_link_virtual_table_entry *) |
14169 | bfd_zalloc (abfd, sizeof (*child->u2.vtable))); | |
14170 | if (!child->u2.vtable) | |
0a1b45a2 | 14171 | return false; |
f6e332e6 | 14172 | } |
c152c796 AM |
14173 | if (!h) |
14174 | { | |
14175 | /* This *should* only be the absolute section. It could potentially | |
14176 | be that someone has defined a non-global vtable though, which | |
14177 | would be bad. It isn't worth paging in the local symbols to be | |
14178 | sure though; that case should simply be handled by the assembler. */ | |
14179 | ||
cbd0eecf | 14180 | child->u2.vtable->parent = (struct elf_link_hash_entry *) -1; |
c152c796 AM |
14181 | } |
14182 | else | |
cbd0eecf | 14183 | child->u2.vtable->parent = h; |
c152c796 | 14184 | |
0a1b45a2 | 14185 | return true; |
c152c796 AM |
14186 | } |
14187 | ||
14188 | /* Called from check_relocs to record the existence of a VTENTRY reloc. */ | |
14189 | ||
0a1b45a2 | 14190 | bool |
a0ea3a14 | 14191 | bfd_elf_gc_record_vtentry (bfd *abfd, asection *sec, |
c152c796 AM |
14192 | struct elf_link_hash_entry *h, |
14193 | bfd_vma addend) | |
14194 | { | |
14195 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14196 | unsigned int log_file_align = bed->s->log_file_align; | |
14197 | ||
a0ea3a14 L |
14198 | if (!h) |
14199 | { | |
14200 | /* xgettext:c-format */ | |
14201 | _bfd_error_handler (_("%pB: section '%pA': corrupt VTENTRY entry"), | |
14202 | abfd, sec); | |
14203 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 14204 | return false; |
a0ea3a14 L |
14205 | } |
14206 | ||
cbd0eecf | 14207 | if (!h->u2.vtable) |
f6e332e6 | 14208 | { |
cbd0eecf L |
14209 | h->u2.vtable = ((struct elf_link_virtual_table_entry *) |
14210 | bfd_zalloc (abfd, sizeof (*h->u2.vtable))); | |
14211 | if (!h->u2.vtable) | |
0a1b45a2 | 14212 | return false; |
f6e332e6 AM |
14213 | } |
14214 | ||
cbd0eecf | 14215 | if (addend >= h->u2.vtable->size) |
c152c796 AM |
14216 | { |
14217 | size_t size, bytes, file_align; | |
0a1b45a2 | 14218 | bool *ptr = h->u2.vtable->used; |
c152c796 AM |
14219 | |
14220 | /* While the symbol is undefined, we have to be prepared to handle | |
14221 | a zero size. */ | |
14222 | file_align = 1 << log_file_align; | |
14223 | if (h->root.type == bfd_link_hash_undefined) | |
14224 | size = addend + file_align; | |
14225 | else | |
14226 | { | |
14227 | size = h->size; | |
14228 | if (addend >= size) | |
14229 | { | |
14230 | /* Oops! We've got a reference past the defined end of | |
14231 | the table. This is probably a bug -- shall we warn? */ | |
14232 | size = addend + file_align; | |
14233 | } | |
14234 | } | |
14235 | size = (size + file_align - 1) & -file_align; | |
14236 | ||
14237 | /* Allocate one extra entry for use as a "done" flag for the | |
14238 | consolidation pass. */ | |
0a1b45a2 | 14239 | bytes = ((size >> log_file_align) + 1) * sizeof (bool); |
c152c796 AM |
14240 | |
14241 | if (ptr) | |
14242 | { | |
0a1b45a2 | 14243 | ptr = (bool *) bfd_realloc (ptr - 1, bytes); |
c152c796 AM |
14244 | |
14245 | if (ptr != NULL) | |
14246 | { | |
14247 | size_t oldbytes; | |
14248 | ||
cbd0eecf | 14249 | oldbytes = (((h->u2.vtable->size >> log_file_align) + 1) |
0a1b45a2 | 14250 | * sizeof (bool)); |
c152c796 AM |
14251 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); |
14252 | } | |
14253 | } | |
14254 | else | |
0a1b45a2 | 14255 | ptr = (bool *) bfd_zmalloc (bytes); |
c152c796 AM |
14256 | |
14257 | if (ptr == NULL) | |
0a1b45a2 | 14258 | return false; |
c152c796 AM |
14259 | |
14260 | /* And arrange for that done flag to be at index -1. */ | |
cbd0eecf L |
14261 | h->u2.vtable->used = ptr + 1; |
14262 | h->u2.vtable->size = size; | |
c152c796 AM |
14263 | } |
14264 | ||
0a1b45a2 | 14265 | h->u2.vtable->used[addend >> log_file_align] = true; |
c152c796 | 14266 | |
0a1b45a2 | 14267 | return true; |
c152c796 AM |
14268 | } |
14269 | ||
ae17ab41 CM |
14270 | /* Map an ELF section header flag to its corresponding string. */ |
14271 | typedef struct | |
14272 | { | |
14273 | char *flag_name; | |
14274 | flagword flag_value; | |
14275 | } elf_flags_to_name_table; | |
14276 | ||
3f75e1d6 | 14277 | static const elf_flags_to_name_table elf_flags_to_names [] = |
ae17ab41 CM |
14278 | { |
14279 | { "SHF_WRITE", SHF_WRITE }, | |
14280 | { "SHF_ALLOC", SHF_ALLOC }, | |
14281 | { "SHF_EXECINSTR", SHF_EXECINSTR }, | |
14282 | { "SHF_MERGE", SHF_MERGE }, | |
14283 | { "SHF_STRINGS", SHF_STRINGS }, | |
14284 | { "SHF_INFO_LINK", SHF_INFO_LINK}, | |
14285 | { "SHF_LINK_ORDER", SHF_LINK_ORDER}, | |
14286 | { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING}, | |
14287 | { "SHF_GROUP", SHF_GROUP }, | |
14288 | { "SHF_TLS", SHF_TLS }, | |
14289 | { "SHF_MASKOS", SHF_MASKOS }, | |
14290 | { "SHF_EXCLUDE", SHF_EXCLUDE }, | |
14291 | }; | |
14292 | ||
b9c361e0 | 14293 | /* Returns TRUE if the section is to be included, otherwise FALSE. */ |
0a1b45a2 | 14294 | bool |
ae17ab41 | 14295 | bfd_elf_lookup_section_flags (struct bfd_link_info *info, |
8b127cbc | 14296 | struct flag_info *flaginfo, |
b9c361e0 | 14297 | asection *section) |
ae17ab41 | 14298 | { |
8b127cbc | 14299 | const bfd_vma sh_flags = elf_section_flags (section); |
ae17ab41 | 14300 | |
8b127cbc | 14301 | if (!flaginfo->flags_initialized) |
ae17ab41 | 14302 | { |
8b127cbc AM |
14303 | bfd *obfd = info->output_bfd; |
14304 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
14305 | struct flag_info_list *tf = flaginfo->flag_list; | |
b9c361e0 JL |
14306 | int with_hex = 0; |
14307 | int without_hex = 0; | |
14308 | ||
8b127cbc | 14309 | for (tf = flaginfo->flag_list; tf != NULL; tf = tf->next) |
ae17ab41 | 14310 | { |
b9c361e0 | 14311 | unsigned i; |
8b127cbc | 14312 | flagword (*lookup) (char *); |
ae17ab41 | 14313 | |
8b127cbc AM |
14314 | lookup = bed->elf_backend_lookup_section_flags_hook; |
14315 | if (lookup != NULL) | |
ae17ab41 | 14316 | { |
8b127cbc | 14317 | flagword hexval = (*lookup) ((char *) tf->name); |
b9c361e0 JL |
14318 | |
14319 | if (hexval != 0) | |
14320 | { | |
14321 | if (tf->with == with_flags) | |
14322 | with_hex |= hexval; | |
14323 | else if (tf->with == without_flags) | |
14324 | without_hex |= hexval; | |
0a1b45a2 | 14325 | tf->valid = true; |
b9c361e0 JL |
14326 | continue; |
14327 | } | |
ae17ab41 | 14328 | } |
8b127cbc | 14329 | for (i = 0; i < ARRAY_SIZE (elf_flags_to_names); ++i) |
ae17ab41 | 14330 | { |
8b127cbc | 14331 | if (strcmp (tf->name, elf_flags_to_names[i].flag_name) == 0) |
b9c361e0 JL |
14332 | { |
14333 | if (tf->with == with_flags) | |
14334 | with_hex |= elf_flags_to_names[i].flag_value; | |
14335 | else if (tf->with == without_flags) | |
14336 | without_hex |= elf_flags_to_names[i].flag_value; | |
0a1b45a2 | 14337 | tf->valid = true; |
b9c361e0 JL |
14338 | break; |
14339 | } | |
14340 | } | |
8b127cbc | 14341 | if (!tf->valid) |
b9c361e0 | 14342 | { |
68ffbac6 | 14343 | info->callbacks->einfo |
9793eb77 | 14344 | (_("unrecognized INPUT_SECTION_FLAG %s\n"), tf->name); |
0a1b45a2 | 14345 | return false; |
ae17ab41 CM |
14346 | } |
14347 | } | |
0a1b45a2 | 14348 | flaginfo->flags_initialized = true; |
8b127cbc AM |
14349 | flaginfo->only_with_flags |= with_hex; |
14350 | flaginfo->not_with_flags |= without_hex; | |
ae17ab41 | 14351 | } |
ae17ab41 | 14352 | |
8b127cbc | 14353 | if ((flaginfo->only_with_flags & sh_flags) != flaginfo->only_with_flags) |
0a1b45a2 | 14354 | return false; |
b9c361e0 | 14355 | |
8b127cbc | 14356 | if ((flaginfo->not_with_flags & sh_flags) != 0) |
0a1b45a2 | 14357 | return false; |
b9c361e0 | 14358 | |
0a1b45a2 | 14359 | return true; |
ae17ab41 CM |
14360 | } |
14361 | ||
c152c796 AM |
14362 | struct alloc_got_off_arg { |
14363 | bfd_vma gotoff; | |
10455f89 | 14364 | struct bfd_link_info *info; |
c152c796 AM |
14365 | }; |
14366 | ||
14367 | /* We need a special top-level link routine to convert got reference counts | |
14368 | to real got offsets. */ | |
14369 | ||
0a1b45a2 | 14370 | static bool |
c152c796 AM |
14371 | elf_gc_allocate_got_offsets (struct elf_link_hash_entry *h, void *arg) |
14372 | { | |
a50b1753 | 14373 | struct alloc_got_off_arg *gofarg = (struct alloc_got_off_arg *) arg; |
10455f89 HPN |
14374 | bfd *obfd = gofarg->info->output_bfd; |
14375 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
c152c796 | 14376 | |
c152c796 AM |
14377 | if (h->got.refcount > 0) |
14378 | { | |
14379 | h->got.offset = gofarg->gotoff; | |
10455f89 | 14380 | gofarg->gotoff += bed->got_elt_size (obfd, gofarg->info, h, NULL, 0); |
c152c796 AM |
14381 | } |
14382 | else | |
14383 | h->got.offset = (bfd_vma) -1; | |
14384 | ||
0a1b45a2 | 14385 | return true; |
c152c796 AM |
14386 | } |
14387 | ||
14388 | /* And an accompanying bit to work out final got entry offsets once | |
14389 | we're done. Should be called from final_link. */ | |
14390 | ||
0a1b45a2 | 14391 | bool |
c152c796 AM |
14392 | bfd_elf_gc_common_finalize_got_offsets (bfd *abfd, |
14393 | struct bfd_link_info *info) | |
14394 | { | |
14395 | bfd *i; | |
14396 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14397 | bfd_vma gotoff; | |
c152c796 AM |
14398 | struct alloc_got_off_arg gofarg; |
14399 | ||
10455f89 HPN |
14400 | BFD_ASSERT (abfd == info->output_bfd); |
14401 | ||
c152c796 | 14402 | if (! is_elf_hash_table (info->hash)) |
0a1b45a2 | 14403 | return false; |
c152c796 AM |
14404 | |
14405 | /* The GOT offset is relative to the .got section, but the GOT header is | |
14406 | put into the .got.plt section, if the backend uses it. */ | |
14407 | if (bed->want_got_plt) | |
14408 | gotoff = 0; | |
14409 | else | |
14410 | gotoff = bed->got_header_size; | |
14411 | ||
14412 | /* Do the local .got entries first. */ | |
c72f2fb2 | 14413 | for (i = info->input_bfds; i; i = i->link.next) |
c152c796 AM |
14414 | { |
14415 | bfd_signed_vma *local_got; | |
ef53be89 | 14416 | size_t j, locsymcount; |
c152c796 AM |
14417 | Elf_Internal_Shdr *symtab_hdr; |
14418 | ||
14419 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) | |
14420 | continue; | |
14421 | ||
14422 | local_got = elf_local_got_refcounts (i); | |
14423 | if (!local_got) | |
14424 | continue; | |
14425 | ||
14426 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
14427 | if (elf_bad_symtab (i)) | |
14428 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
14429 | else | |
14430 | locsymcount = symtab_hdr->sh_info; | |
14431 | ||
14432 | for (j = 0; j < locsymcount; ++j) | |
14433 | { | |
14434 | if (local_got[j] > 0) | |
14435 | { | |
14436 | local_got[j] = gotoff; | |
10455f89 | 14437 | gotoff += bed->got_elt_size (abfd, info, NULL, i, j); |
c152c796 AM |
14438 | } |
14439 | else | |
14440 | local_got[j] = (bfd_vma) -1; | |
14441 | } | |
14442 | } | |
14443 | ||
14444 | /* Then the global .got entries. .plt refcounts are handled by | |
14445 | adjust_dynamic_symbol */ | |
14446 | gofarg.gotoff = gotoff; | |
10455f89 | 14447 | gofarg.info = info; |
c152c796 AM |
14448 | elf_link_hash_traverse (elf_hash_table (info), |
14449 | elf_gc_allocate_got_offsets, | |
14450 | &gofarg); | |
0a1b45a2 | 14451 | return true; |
c152c796 AM |
14452 | } |
14453 | ||
14454 | /* Many folk need no more in the way of final link than this, once | |
14455 | got entry reference counting is enabled. */ | |
14456 | ||
0a1b45a2 | 14457 | bool |
c152c796 AM |
14458 | bfd_elf_gc_common_final_link (bfd *abfd, struct bfd_link_info *info) |
14459 | { | |
14460 | if (!bfd_elf_gc_common_finalize_got_offsets (abfd, info)) | |
0a1b45a2 | 14461 | return false; |
c152c796 AM |
14462 | |
14463 | /* Invoke the regular ELF backend linker to do all the work. */ | |
14464 | return bfd_elf_final_link (abfd, info); | |
14465 | } | |
14466 | ||
0a1b45a2 | 14467 | bool |
c152c796 AM |
14468 | bfd_elf_reloc_symbol_deleted_p (bfd_vma offset, void *cookie) |
14469 | { | |
a50b1753 | 14470 | struct elf_reloc_cookie *rcookie = (struct elf_reloc_cookie *) cookie; |
c152c796 AM |
14471 | |
14472 | if (rcookie->bad_symtab) | |
14473 | rcookie->rel = rcookie->rels; | |
14474 | ||
14475 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
14476 | { | |
14477 | unsigned long r_symndx; | |
14478 | ||
14479 | if (! rcookie->bad_symtab) | |
14480 | if (rcookie->rel->r_offset > offset) | |
0a1b45a2 | 14481 | return false; |
c152c796 AM |
14482 | if (rcookie->rel->r_offset != offset) |
14483 | continue; | |
14484 | ||
14485 | r_symndx = rcookie->rel->r_info >> rcookie->r_sym_shift; | |
2c2fa401 | 14486 | if (r_symndx == STN_UNDEF) |
0a1b45a2 | 14487 | return true; |
c152c796 AM |
14488 | |
14489 | if (r_symndx >= rcookie->locsymcount | |
14490 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
14491 | { | |
14492 | struct elf_link_hash_entry *h; | |
14493 | ||
14494 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
14495 | ||
14496 | while (h->root.type == bfd_link_hash_indirect | |
14497 | || h->root.type == bfd_link_hash_warning) | |
14498 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
14499 | ||
14500 | if ((h->root.type == bfd_link_hash_defined | |
14501 | || h->root.type == bfd_link_hash_defweak) | |
5b69e357 AM |
14502 | && (h->root.u.def.section->owner != rcookie->abfd |
14503 | || h->root.u.def.section->kept_section != NULL | |
14504 | || discarded_section (h->root.u.def.section))) | |
0a1b45a2 | 14505 | return true; |
c152c796 AM |
14506 | } |
14507 | else | |
14508 | { | |
14509 | /* It's not a relocation against a global symbol, | |
14510 | but it could be a relocation against a local | |
14511 | symbol for a discarded section. */ | |
14512 | asection *isec; | |
14513 | Elf_Internal_Sym *isym; | |
14514 | ||
14515 | /* Need to: get the symbol; get the section. */ | |
14516 | isym = &rcookie->locsyms[r_symndx]; | |
cb33740c | 14517 | isec = bfd_section_from_elf_index (rcookie->abfd, isym->st_shndx); |
5b69e357 AM |
14518 | if (isec != NULL |
14519 | && (isec->kept_section != NULL | |
14520 | || discarded_section (isec))) | |
0a1b45a2 | 14521 | return true; |
c152c796 | 14522 | } |
0a1b45a2 | 14523 | return false; |
c152c796 | 14524 | } |
0a1b45a2 | 14525 | return false; |
c152c796 AM |
14526 | } |
14527 | ||
14528 | /* Discard unneeded references to discarded sections. | |
75938853 AM |
14529 | Returns -1 on error, 1 if any section's size was changed, 0 if |
14530 | nothing changed. This function assumes that the relocations are in | |
14531 | sorted order, which is true for all known assemblers. */ | |
c152c796 | 14532 | |
75938853 | 14533 | int |
c152c796 AM |
14534 | bfd_elf_discard_info (bfd *output_bfd, struct bfd_link_info *info) |
14535 | { | |
14536 | struct elf_reloc_cookie cookie; | |
18cd5bce | 14537 | asection *o; |
c152c796 | 14538 | bfd *abfd; |
75938853 | 14539 | int changed = 0; |
c152c796 AM |
14540 | |
14541 | if (info->traditional_format | |
14542 | || !is_elf_hash_table (info->hash)) | |
75938853 | 14543 | return 0; |
c152c796 | 14544 | |
18cd5bce AM |
14545 | o = bfd_get_section_by_name (output_bfd, ".stab"); |
14546 | if (o != NULL) | |
c152c796 | 14547 | { |
18cd5bce | 14548 | asection *i; |
c152c796 | 14549 | |
18cd5bce | 14550 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
8da3dbc5 | 14551 | { |
18cd5bce AM |
14552 | if (i->size == 0 |
14553 | || i->reloc_count == 0 | |
14554 | || i->sec_info_type != SEC_INFO_TYPE_STABS) | |
14555 | continue; | |
c152c796 | 14556 | |
18cd5bce AM |
14557 | abfd = i->owner; |
14558 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
14559 | continue; | |
c152c796 | 14560 | |
18cd5bce | 14561 | if (!init_reloc_cookie_for_section (&cookie, info, i)) |
75938853 | 14562 | return -1; |
c152c796 | 14563 | |
18cd5bce AM |
14564 | if (_bfd_discard_section_stabs (abfd, i, |
14565 | elf_section_data (i)->sec_info, | |
5241d853 RS |
14566 | bfd_elf_reloc_symbol_deleted_p, |
14567 | &cookie)) | |
75938853 | 14568 | changed = 1; |
18cd5bce AM |
14569 | |
14570 | fini_reloc_cookie_for_section (&cookie, i); | |
c152c796 | 14571 | } |
18cd5bce AM |
14572 | } |
14573 | ||
2f0c68f2 CM |
14574 | o = NULL; |
14575 | if (info->eh_frame_hdr_type != COMPACT_EH_HDR) | |
14576 | o = bfd_get_section_by_name (output_bfd, ".eh_frame"); | |
18cd5bce AM |
14577 | if (o != NULL) |
14578 | { | |
14579 | asection *i; | |
d7153c4a | 14580 | int eh_changed = 0; |
66631823 | 14581 | unsigned int eh_alignment; /* Octets. */ |
c152c796 | 14582 | |
18cd5bce | 14583 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
c152c796 | 14584 | { |
18cd5bce AM |
14585 | if (i->size == 0) |
14586 | continue; | |
14587 | ||
14588 | abfd = i->owner; | |
14589 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
14590 | continue; | |
14591 | ||
14592 | if (!init_reloc_cookie_for_section (&cookie, info, i)) | |
75938853 | 14593 | return -1; |
18cd5bce AM |
14594 | |
14595 | _bfd_elf_parse_eh_frame (abfd, info, i, &cookie); | |
14596 | if (_bfd_elf_discard_section_eh_frame (abfd, info, i, | |
c152c796 AM |
14597 | bfd_elf_reloc_symbol_deleted_p, |
14598 | &cookie)) | |
d7153c4a AM |
14599 | { |
14600 | eh_changed = 1; | |
14601 | if (i->size != i->rawsize) | |
14602 | changed = 1; | |
14603 | } | |
18cd5bce AM |
14604 | |
14605 | fini_reloc_cookie_for_section (&cookie, i); | |
c152c796 | 14606 | } |
9866ffe2 | 14607 | |
66631823 CE |
14608 | eh_alignment = ((1 << o->alignment_power) |
14609 | * bfd_octets_per_byte (output_bfd, o)); | |
9866ffe2 AM |
14610 | /* Skip over zero terminator, and prevent empty sections from |
14611 | adding alignment padding at the end. */ | |
14612 | for (i = o->map_tail.s; i != NULL; i = i->map_tail.s) | |
14613 | if (i->size == 0) | |
14614 | i->flags |= SEC_EXCLUDE; | |
14615 | else if (i->size > 4) | |
14616 | break; | |
14617 | /* The last non-empty eh_frame section doesn't need padding. */ | |
14618 | if (i != NULL) | |
14619 | i = i->map_tail.s; | |
14620 | /* Any prior sections must pad the last FDE out to the output | |
14621 | section alignment. Otherwise we might have zero padding | |
14622 | between sections, which would be seen as a terminator. */ | |
14623 | for (; i != NULL; i = i->map_tail.s) | |
14624 | if (i->size == 4) | |
14625 | /* All but the last zero terminator should have been removed. */ | |
14626 | BFD_FAIL (); | |
14627 | else | |
14628 | { | |
14629 | bfd_size_type size | |
14630 | = (i->size + eh_alignment - 1) & -eh_alignment; | |
14631 | if (i->size != size) | |
af471f82 | 14632 | { |
9866ffe2 AM |
14633 | i->size = size; |
14634 | changed = 1; | |
14635 | eh_changed = 1; | |
af471f82 | 14636 | } |
9866ffe2 | 14637 | } |
d7153c4a AM |
14638 | if (eh_changed) |
14639 | elf_link_hash_traverse (elf_hash_table (info), | |
14640 | _bfd_elf_adjust_eh_frame_global_symbol, NULL); | |
18cd5bce | 14641 | } |
c152c796 | 14642 | |
18cd5bce AM |
14643 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next) |
14644 | { | |
14645 | const struct elf_backend_data *bed; | |
57963c05 | 14646 | asection *s; |
c152c796 | 14647 | |
18cd5bce AM |
14648 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
14649 | continue; | |
57963c05 AM |
14650 | s = abfd->sections; |
14651 | if (s == NULL || s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
14652 | continue; | |
18cd5bce AM |
14653 | |
14654 | bed = get_elf_backend_data (abfd); | |
14655 | ||
14656 | if (bed->elf_backend_discard_info != NULL) | |
14657 | { | |
14658 | if (!init_reloc_cookie (&cookie, info, abfd)) | |
75938853 | 14659 | return -1; |
18cd5bce AM |
14660 | |
14661 | if ((*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
75938853 | 14662 | changed = 1; |
18cd5bce AM |
14663 | |
14664 | fini_reloc_cookie (&cookie, abfd); | |
14665 | } | |
c152c796 AM |
14666 | } |
14667 | ||
2f0c68f2 CM |
14668 | if (info->eh_frame_hdr_type == COMPACT_EH_HDR) |
14669 | _bfd_elf_end_eh_frame_parsing (info); | |
14670 | ||
14671 | if (info->eh_frame_hdr_type | |
0e1862bb | 14672 | && !bfd_link_relocatable (info) |
c152c796 | 14673 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) |
75938853 | 14674 | changed = 1; |
c152c796 | 14675 | |
75938853 | 14676 | return changed; |
c152c796 | 14677 | } |
082b7297 | 14678 | |
0a1b45a2 | 14679 | bool |
0c511000 | 14680 | _bfd_elf_section_already_linked (bfd *abfd, |
c77ec726 | 14681 | asection *sec, |
c0f00686 | 14682 | struct bfd_link_info *info) |
082b7297 L |
14683 | { |
14684 | flagword flags; | |
c77ec726 | 14685 | const char *name, *key; |
082b7297 L |
14686 | struct bfd_section_already_linked *l; |
14687 | struct bfd_section_already_linked_hash_entry *already_linked_list; | |
0c511000 | 14688 | |
c77ec726 | 14689 | if (sec->output_section == bfd_abs_section_ptr) |
0a1b45a2 | 14690 | return false; |
0c511000 | 14691 | |
c77ec726 | 14692 | flags = sec->flags; |
0c511000 | 14693 | |
c77ec726 AM |
14694 | /* Return if it isn't a linkonce section. A comdat group section |
14695 | also has SEC_LINK_ONCE set. */ | |
14696 | if ((flags & SEC_LINK_ONCE) == 0) | |
0a1b45a2 | 14697 | return false; |
0c511000 | 14698 | |
c77ec726 AM |
14699 | /* Don't put group member sections on our list of already linked |
14700 | sections. They are handled as a group via their group section. */ | |
14701 | if (elf_sec_group (sec) != NULL) | |
0a1b45a2 | 14702 | return false; |
0c511000 | 14703 | |
c77ec726 AM |
14704 | /* For a SHT_GROUP section, use the group signature as the key. */ |
14705 | name = sec->name; | |
14706 | if ((flags & SEC_GROUP) != 0 | |
14707 | && elf_next_in_group (sec) != NULL | |
14708 | && elf_group_name (elf_next_in_group (sec)) != NULL) | |
14709 | key = elf_group_name (elf_next_in_group (sec)); | |
14710 | else | |
14711 | { | |
14712 | /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */ | |
08dedd66 | 14713 | if (startswith (name, ".gnu.linkonce.") |
c77ec726 AM |
14714 | && (key = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL) |
14715 | key++; | |
0c511000 | 14716 | else |
c77ec726 AM |
14717 | /* Must be a user linkonce section that doesn't follow gcc's |
14718 | naming convention. In this case we won't be matching | |
14719 | single member groups. */ | |
14720 | key = name; | |
0c511000 | 14721 | } |
6d2cd210 | 14722 | |
c77ec726 | 14723 | already_linked_list = bfd_section_already_linked_table_lookup (key); |
082b7297 L |
14724 | |
14725 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
14726 | { | |
c2370991 | 14727 | /* We may have 2 different types of sections on the list: group |
c77ec726 AM |
14728 | sections with a signature of <key> (<key> is some string), |
14729 | and linkonce sections named .gnu.linkonce.<type>.<key>. | |
14730 | Match like sections. LTO plugin sections are an exception. | |
14731 | They are always named .gnu.linkonce.t.<key> and match either | |
14732 | type of section. */ | |
14733 | if (((flags & SEC_GROUP) == (l->sec->flags & SEC_GROUP) | |
14734 | && ((flags & SEC_GROUP) != 0 | |
14735 | || strcmp (name, l->sec->name) == 0)) | |
e8a83e93 MB |
14736 | || (l->sec->owner->flags & BFD_PLUGIN) != 0 |
14737 | || (sec->owner->flags & BFD_PLUGIN) != 0) | |
082b7297 L |
14738 | { |
14739 | /* The section has already been linked. See if we should | |
6d2cd210 | 14740 | issue a warning. */ |
c77ec726 | 14741 | if (!_bfd_handle_already_linked (sec, l, info)) |
0a1b45a2 | 14742 | return false; |
082b7297 | 14743 | |
c77ec726 | 14744 | if (flags & SEC_GROUP) |
3d7f7666 | 14745 | { |
c77ec726 AM |
14746 | asection *first = elf_next_in_group (sec); |
14747 | asection *s = first; | |
3d7f7666 | 14748 | |
c77ec726 | 14749 | while (s != NULL) |
3d7f7666 | 14750 | { |
c77ec726 AM |
14751 | s->output_section = bfd_abs_section_ptr; |
14752 | /* Record which group discards it. */ | |
14753 | s->kept_section = l->sec; | |
14754 | s = elf_next_in_group (s); | |
14755 | /* These lists are circular. */ | |
14756 | if (s == first) | |
14757 | break; | |
3d7f7666 L |
14758 | } |
14759 | } | |
082b7297 | 14760 | |
0a1b45a2 | 14761 | return true; |
082b7297 L |
14762 | } |
14763 | } | |
14764 | ||
c77ec726 AM |
14765 | /* A single member comdat group section may be discarded by a |
14766 | linkonce section and vice versa. */ | |
14767 | if ((flags & SEC_GROUP) != 0) | |
3d7f7666 | 14768 | { |
c77ec726 | 14769 | asection *first = elf_next_in_group (sec); |
c2370991 | 14770 | |
c77ec726 AM |
14771 | if (first != NULL && elf_next_in_group (first) == first) |
14772 | /* Check this single member group against linkonce sections. */ | |
14773 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
14774 | if ((l->sec->flags & SEC_GROUP) == 0 | |
14775 | && bfd_elf_match_symbols_in_sections (l->sec, first, info)) | |
14776 | { | |
14777 | first->output_section = bfd_abs_section_ptr; | |
14778 | first->kept_section = l->sec; | |
14779 | sec->output_section = bfd_abs_section_ptr; | |
14780 | break; | |
14781 | } | |
14782 | } | |
14783 | else | |
14784 | /* Check this linkonce section against single member groups. */ | |
14785 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
14786 | if (l->sec->flags & SEC_GROUP) | |
6d2cd210 | 14787 | { |
c77ec726 | 14788 | asection *first = elf_next_in_group (l->sec); |
6d2cd210 | 14789 | |
c77ec726 AM |
14790 | if (first != NULL |
14791 | && elf_next_in_group (first) == first | |
14792 | && bfd_elf_match_symbols_in_sections (first, sec, info)) | |
14793 | { | |
14794 | sec->output_section = bfd_abs_section_ptr; | |
14795 | sec->kept_section = first; | |
14796 | break; | |
14797 | } | |
6d2cd210 | 14798 | } |
0c511000 | 14799 | |
c77ec726 AM |
14800 | /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F' |
14801 | referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4 | |
14802 | specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce' | |
14803 | prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its | |
14804 | matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded | |
14805 | but its `.gnu.linkonce.t.F' is discarded means we chose one-only | |
14806 | `.gnu.linkonce.t.F' section from a different bfd not requiring any | |
14807 | `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded. | |
14808 | The reverse order cannot happen as there is never a bfd with only the | |
14809 | `.gnu.linkonce.r.F' section. The order of sections in a bfd does not | |
14810 | matter as here were are looking only for cross-bfd sections. */ | |
14811 | ||
08dedd66 | 14812 | if ((flags & SEC_GROUP) == 0 && startswith (name, ".gnu.linkonce.r.")) |
c77ec726 AM |
14813 | for (l = already_linked_list->entry; l != NULL; l = l->next) |
14814 | if ((l->sec->flags & SEC_GROUP) == 0 | |
08dedd66 | 14815 | && startswith (l->sec->name, ".gnu.linkonce.t.")) |
c77ec726 AM |
14816 | { |
14817 | if (abfd != l->sec->owner) | |
14818 | sec->output_section = bfd_abs_section_ptr; | |
14819 | break; | |
14820 | } | |
80c29487 | 14821 | |
082b7297 | 14822 | /* This is the first section with this name. Record it. */ |
c77ec726 | 14823 | if (!bfd_section_already_linked_table_insert (already_linked_list, sec)) |
bb6198d2 | 14824 | info->callbacks->einfo (_("%F%P: already_linked_table: %E\n")); |
c77ec726 | 14825 | return sec->output_section == bfd_abs_section_ptr; |
082b7297 | 14826 | } |
81e1b023 | 14827 | |
0a1b45a2 | 14828 | bool |
a4d8e49b L |
14829 | _bfd_elf_common_definition (Elf_Internal_Sym *sym) |
14830 | { | |
14831 | return sym->st_shndx == SHN_COMMON; | |
14832 | } | |
14833 | ||
14834 | unsigned int | |
14835 | _bfd_elf_common_section_index (asection *sec ATTRIBUTE_UNUSED) | |
14836 | { | |
14837 | return SHN_COMMON; | |
14838 | } | |
14839 | ||
14840 | asection * | |
14841 | _bfd_elf_common_section (asection *sec ATTRIBUTE_UNUSED) | |
14842 | { | |
14843 | return bfd_com_section_ptr; | |
14844 | } | |
10455f89 HPN |
14845 | |
14846 | bfd_vma | |
14847 | _bfd_elf_default_got_elt_size (bfd *abfd, | |
14848 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
14849 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, | |
14850 | bfd *ibfd ATTRIBUTE_UNUSED, | |
14851 | unsigned long symndx ATTRIBUTE_UNUSED) | |
14852 | { | |
14853 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14854 | return bed->s->arch_size / 8; | |
14855 | } | |
83bac4b0 NC |
14856 | |
14857 | /* Routines to support the creation of dynamic relocs. */ | |
14858 | ||
83bac4b0 NC |
14859 | /* Returns the name of the dynamic reloc section associated with SEC. */ |
14860 | ||
14861 | static const char * | |
14862 | get_dynamic_reloc_section_name (bfd * abfd, | |
14863 | asection * sec, | |
0a1b45a2 | 14864 | bool is_rela) |
83bac4b0 | 14865 | { |
ddcf1fcf | 14866 | char *name; |
fd361982 | 14867 | const char *old_name = bfd_section_name (sec); |
ddcf1fcf | 14868 | const char *prefix = is_rela ? ".rela" : ".rel"; |
83bac4b0 | 14869 | |
ddcf1fcf | 14870 | if (old_name == NULL) |
83bac4b0 NC |
14871 | return NULL; |
14872 | ||
ddcf1fcf | 14873 | name = bfd_alloc (abfd, strlen (prefix) + strlen (old_name) + 1); |
68ffbac6 | 14874 | sprintf (name, "%s%s", prefix, old_name); |
83bac4b0 NC |
14875 | |
14876 | return name; | |
14877 | } | |
14878 | ||
14879 | /* Returns the dynamic reloc section associated with SEC. | |
14880 | If necessary compute the name of the dynamic reloc section based | |
14881 | on SEC's name (looked up in ABFD's string table) and the setting | |
14882 | of IS_RELA. */ | |
14883 | ||
14884 | asection * | |
0a1b45a2 AM |
14885 | _bfd_elf_get_dynamic_reloc_section (bfd *abfd, |
14886 | asection *sec, | |
14887 | bool is_rela) | |
83bac4b0 | 14888 | { |
0a1b45a2 | 14889 | asection *reloc_sec = elf_section_data (sec)->sreloc; |
83bac4b0 NC |
14890 | |
14891 | if (reloc_sec == NULL) | |
14892 | { | |
0a1b45a2 | 14893 | const char *name = get_dynamic_reloc_section_name (abfd, sec, is_rela); |
83bac4b0 NC |
14894 | |
14895 | if (name != NULL) | |
14896 | { | |
3d4d4302 | 14897 | reloc_sec = bfd_get_linker_section (abfd, name); |
83bac4b0 NC |
14898 | |
14899 | if (reloc_sec != NULL) | |
14900 | elf_section_data (sec)->sreloc = reloc_sec; | |
14901 | } | |
14902 | } | |
14903 | ||
14904 | return reloc_sec; | |
14905 | } | |
14906 | ||
14907 | /* Returns the dynamic reloc section associated with SEC. If the | |
14908 | section does not exist it is created and attached to the DYNOBJ | |
14909 | bfd and stored in the SRELOC field of SEC's elf_section_data | |
14910 | structure. | |
f8076f98 | 14911 | |
83bac4b0 NC |
14912 | ALIGNMENT is the alignment for the newly created section and |
14913 | IS_RELA defines whether the name should be .rela.<SEC's name> | |
14914 | or .rel.<SEC's name>. The section name is looked up in the | |
14915 | string table associated with ABFD. */ | |
14916 | ||
14917 | asection * | |
ca4be51c AM |
14918 | _bfd_elf_make_dynamic_reloc_section (asection *sec, |
14919 | bfd *dynobj, | |
14920 | unsigned int alignment, | |
14921 | bfd *abfd, | |
0a1b45a2 | 14922 | bool is_rela) |
83bac4b0 NC |
14923 | { |
14924 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
14925 | ||
14926 | if (reloc_sec == NULL) | |
14927 | { | |
14928 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
14929 | ||
14930 | if (name == NULL) | |
14931 | return NULL; | |
14932 | ||
3d4d4302 | 14933 | reloc_sec = bfd_get_linker_section (dynobj, name); |
83bac4b0 NC |
14934 | |
14935 | if (reloc_sec == NULL) | |
14936 | { | |
3d4d4302 AM |
14937 | flagword flags = (SEC_HAS_CONTENTS | SEC_READONLY |
14938 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
83bac4b0 NC |
14939 | if ((sec->flags & SEC_ALLOC) != 0) |
14940 | flags |= SEC_ALLOC | SEC_LOAD; | |
14941 | ||
3d4d4302 | 14942 | reloc_sec = bfd_make_section_anyway_with_flags (dynobj, name, flags); |
83bac4b0 NC |
14943 | if (reloc_sec != NULL) |
14944 | { | |
8877b5e5 AM |
14945 | /* _bfd_elf_get_sec_type_attr chooses a section type by |
14946 | name. Override as it may be wrong, eg. for a user | |
14947 | section named "auto" we'll get ".relauto" which is | |
14948 | seen to be a .rela section. */ | |
14949 | elf_section_type (reloc_sec) = is_rela ? SHT_RELA : SHT_REL; | |
fd361982 | 14950 | if (!bfd_set_section_alignment (reloc_sec, alignment)) |
83bac4b0 NC |
14951 | reloc_sec = NULL; |
14952 | } | |
14953 | } | |
14954 | ||
14955 | elf_section_data (sec)->sreloc = reloc_sec; | |
14956 | } | |
14957 | ||
14958 | return reloc_sec; | |
14959 | } | |
1338dd10 | 14960 | |
bffebb6b AM |
14961 | /* Copy the ELF symbol type and other attributes for a linker script |
14962 | assignment from HSRC to HDEST. Generally this should be treated as | |
14963 | if we found a strong non-dynamic definition for HDEST (except that | |
14964 | ld ignores multiple definition errors). */ | |
1338dd10 | 14965 | void |
bffebb6b AM |
14966 | _bfd_elf_copy_link_hash_symbol_type (bfd *abfd, |
14967 | struct bfd_link_hash_entry *hdest, | |
14968 | struct bfd_link_hash_entry *hsrc) | |
1338dd10 | 14969 | { |
bffebb6b AM |
14970 | struct elf_link_hash_entry *ehdest = (struct elf_link_hash_entry *) hdest; |
14971 | struct elf_link_hash_entry *ehsrc = (struct elf_link_hash_entry *) hsrc; | |
14972 | Elf_Internal_Sym isym; | |
1338dd10 PB |
14973 | |
14974 | ehdest->type = ehsrc->type; | |
35fc36a8 | 14975 | ehdest->target_internal = ehsrc->target_internal; |
bffebb6b AM |
14976 | |
14977 | isym.st_other = ehsrc->other; | |
0a1b45a2 | 14978 | elf_merge_st_other (abfd, ehdest, isym.st_other, NULL, true, false); |
1338dd10 | 14979 | } |
351f65ca L |
14980 | |
14981 | /* Append a RELA relocation REL to section S in BFD. */ | |
14982 | ||
14983 | void | |
14984 | elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
14985 | { | |
14986 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14987 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); | |
14988 | BFD_ASSERT (loc + bed->s->sizeof_rela <= s->contents + s->size); | |
14989 | bed->s->swap_reloca_out (abfd, rel, loc); | |
14990 | } | |
14991 | ||
14992 | /* Append a REL relocation REL to section S in BFD. */ | |
14993 | ||
14994 | void | |
14995 | elf_append_rel (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
14996 | { | |
14997 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14998 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rel); | |
14999 | BFD_ASSERT (loc + bed->s->sizeof_rel <= s->contents + s->size); | |
59d6ffb2 | 15000 | bed->s->swap_reloc_out (abfd, rel, loc); |
351f65ca | 15001 | } |
7dba9362 AM |
15002 | |
15003 | /* Define __start, __stop, .startof. or .sizeof. symbol. */ | |
15004 | ||
15005 | struct bfd_link_hash_entry * | |
15006 | bfd_elf_define_start_stop (struct bfd_link_info *info, | |
15007 | const char *symbol, asection *sec) | |
15008 | { | |
487b6440 | 15009 | struct elf_link_hash_entry *h; |
7dba9362 | 15010 | |
487b6440 | 15011 | h = elf_link_hash_lookup (elf_hash_table (info), symbol, |
0a1b45a2 | 15012 | false, false, true); |
e1b5d517 | 15013 | /* NB: Common symbols will be turned into definition later. */ |
487b6440 | 15014 | if (h != NULL |
8ee10e86 | 15015 | && !h->root.ldscript_def |
487b6440 AM |
15016 | && (h->root.type == bfd_link_hash_undefined |
15017 | || h->root.type == bfd_link_hash_undefweak | |
e1b5d517 L |
15018 | || ((h->ref_regular || h->def_dynamic) |
15019 | && !h->def_regular | |
15020 | && h->root.type != bfd_link_hash_common))) | |
7dba9362 | 15021 | { |
0a1b45a2 | 15022 | bool was_dynamic = h->ref_dynamic || h->def_dynamic; |
e1b5d517 | 15023 | h->verinfo.verdef = NULL; |
487b6440 AM |
15024 | h->root.type = bfd_link_hash_defined; |
15025 | h->root.u.def.section = sec; | |
15026 | h->root.u.def.value = 0; | |
15027 | h->def_regular = 1; | |
15028 | h->def_dynamic = 0; | |
15029 | h->start_stop = 1; | |
15030 | h->u2.start_stop_section = sec; | |
15031 | if (symbol[0] == '.') | |
15032 | { | |
15033 | /* .startof. and .sizeof. symbols are local. */ | |
559192d8 AM |
15034 | const struct elf_backend_data *bed; |
15035 | bed = get_elf_backend_data (info->output_bfd); | |
0a1b45a2 | 15036 | (*bed->elf_backend_hide_symbol) (info, h, true); |
487b6440 | 15037 | } |
36b8fda5 AM |
15038 | else |
15039 | { | |
15040 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
cae64165 RM |
15041 | h->other = ((h->other & ~ELF_ST_VISIBILITY (-1)) |
15042 | | info->start_stop_visibility); | |
bf3077a6 | 15043 | if (was_dynamic) |
36b8fda5 AM |
15044 | bfd_elf_link_record_dynamic_symbol (info, h); |
15045 | } | |
487b6440 | 15046 | return &h->root; |
7dba9362 | 15047 | } |
487b6440 | 15048 | return NULL; |
7dba9362 | 15049 | } |
5dbc8b37 L |
15050 | |
15051 | /* Find dynamic relocs for H that apply to read-only sections. */ | |
15052 | ||
15053 | asection * | |
15054 | _bfd_elf_readonly_dynrelocs (struct elf_link_hash_entry *h) | |
15055 | { | |
15056 | struct elf_dyn_relocs *p; | |
15057 | ||
15058 | for (p = h->dyn_relocs; p != NULL; p = p->next) | |
15059 | { | |
15060 | asection *s = p->sec->output_section; | |
15061 | ||
15062 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
15063 | return p->sec; | |
15064 | } | |
15065 | return NULL; | |
15066 | } | |
d49e5065 L |
15067 | |
15068 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to | |
15069 | read-only sections. */ | |
15070 | ||
0a1b45a2 | 15071 | bool |
d49e5065 L |
15072 | _bfd_elf_maybe_set_textrel (struct elf_link_hash_entry *h, void *inf) |
15073 | { | |
15074 | asection *sec; | |
15075 | ||
15076 | if (h->root.type == bfd_link_hash_indirect) | |
0a1b45a2 | 15077 | return true; |
d49e5065 L |
15078 | |
15079 | sec = _bfd_elf_readonly_dynrelocs (h); | |
15080 | if (sec != NULL) | |
15081 | { | |
15082 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
15083 | ||
15084 | info->flags |= DF_TEXTREL; | |
15085 | /* xgettext:c-format */ | |
15086 | info->callbacks->minfo (_("%pB: dynamic relocation against `%pT' " | |
15087 | "in read-only section `%pA'\n"), | |
15088 | sec->owner, h->root.root.string, sec); | |
15089 | ||
15090 | if (bfd_link_textrel_check (info)) | |
15091 | /* xgettext:c-format */ | |
15092 | info->callbacks->einfo (_("%P: %pB: warning: relocation against `%s' " | |
15093 | "in read-only section `%pA'\n"), | |
15094 | sec->owner, h->root.root.string, sec); | |
15095 | ||
15096 | /* Not an error, just cut short the traversal. */ | |
0a1b45a2 | 15097 | return false; |
d49e5065 | 15098 | } |
0a1b45a2 | 15099 | return true; |
d49e5065 | 15100 | } |
3084d7a2 L |
15101 | |
15102 | /* Add dynamic tags. */ | |
15103 | ||
0a1b45a2 | 15104 | bool |
3084d7a2 | 15105 | _bfd_elf_add_dynamic_tags (bfd *output_bfd, struct bfd_link_info *info, |
0a1b45a2 | 15106 | bool need_dynamic_reloc) |
3084d7a2 L |
15107 | { |
15108 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
15109 | ||
15110 | if (htab->dynamic_sections_created) | |
15111 | { | |
15112 | /* Add some entries to the .dynamic section. We fill in the | |
15113 | values later, in finish_dynamic_sections, but we must add | |
15114 | the entries now so that we get the correct size for the | |
15115 | .dynamic section. The DT_DEBUG entry is filled in by the | |
15116 | dynamic linker and used by the debugger. */ | |
15117 | #define add_dynamic_entry(TAG, VAL) \ | |
15118 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
15119 | ||
15120 | const struct elf_backend_data *bed | |
15121 | = get_elf_backend_data (output_bfd); | |
15122 | ||
15123 | if (bfd_link_executable (info)) | |
15124 | { | |
15125 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
0a1b45a2 | 15126 | return false; |
3084d7a2 L |
15127 | } |
15128 | ||
15129 | if (htab->dt_pltgot_required || htab->splt->size != 0) | |
15130 | { | |
15131 | /* DT_PLTGOT is used by prelink even if there is no PLT | |
15132 | relocation. */ | |
15133 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
0a1b45a2 | 15134 | return false; |
3084d7a2 L |
15135 | } |
15136 | ||
15137 | if (htab->dt_jmprel_required || htab->srelplt->size != 0) | |
15138 | { | |
15139 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
15140 | || !add_dynamic_entry (DT_PLTREL, | |
15141 | (bed->rela_plts_and_copies_p | |
15142 | ? DT_RELA : DT_REL)) | |
15143 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
0a1b45a2 | 15144 | return false; |
3084d7a2 L |
15145 | } |
15146 | ||
15147 | if (htab->tlsdesc_plt | |
15148 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
15149 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
0a1b45a2 | 15150 | return false; |
3084d7a2 L |
15151 | |
15152 | if (need_dynamic_reloc) | |
15153 | { | |
15154 | if (bed->rela_plts_and_copies_p) | |
15155 | { | |
15156 | if (!add_dynamic_entry (DT_RELA, 0) | |
15157 | || !add_dynamic_entry (DT_RELASZ, 0) | |
15158 | || !add_dynamic_entry (DT_RELAENT, | |
15159 | bed->s->sizeof_rela)) | |
0a1b45a2 | 15160 | return false; |
3084d7a2 L |
15161 | } |
15162 | else | |
15163 | { | |
15164 | if (!add_dynamic_entry (DT_REL, 0) | |
15165 | || !add_dynamic_entry (DT_RELSZ, 0) | |
15166 | || !add_dynamic_entry (DT_RELENT, | |
15167 | bed->s->sizeof_rel)) | |
0a1b45a2 | 15168 | return false; |
3084d7a2 L |
15169 | } |
15170 | ||
15171 | /* If any dynamic relocs apply to a read-only section, | |
15172 | then we need a DT_TEXTREL entry. */ | |
15173 | if ((info->flags & DF_TEXTREL) == 0) | |
15174 | elf_link_hash_traverse (htab, _bfd_elf_maybe_set_textrel, | |
15175 | info); | |
15176 | ||
15177 | if ((info->flags & DF_TEXTREL) != 0) | |
15178 | { | |
15179 | if (htab->ifunc_resolvers) | |
15180 | info->callbacks->einfo | |
15181 | (_("%P: warning: GNU indirect functions with DT_TEXTREL " | |
15182 | "may result in a segfault at runtime; recompile with %s\n"), | |
15183 | bfd_link_dll (info) ? "-fPIC" : "-fPIE"); | |
15184 | ||
15185 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
0a1b45a2 | 15186 | return false; |
3084d7a2 L |
15187 | } |
15188 | } | |
15189 | } | |
15190 | #undef add_dynamic_entry | |
15191 | ||
0a1b45a2 | 15192 | return true; |
3084d7a2 | 15193 | } |