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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
28e7fd62 | 2 | Copyright (C) 2008-2013 Free Software Foundation, Inc. |
a80b95ba TG |
3 | |
4 | Contributed by AdaCore. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "symtab.h" | |
24 | #include "gdbtypes.h" | |
25 | #include "bfd.h" | |
26 | #include "symfile.h" | |
27 | #include "objfiles.h" | |
28 | #include "buildsym.h" | |
29 | #include "gdbcmd.h" | |
30 | #include "gdbcore.h" | |
31 | #include "mach-o.h" | |
32 | #include "gdb_assert.h" | |
33 | #include "aout/stab_gnu.h" | |
34 | #include "vec.h" | |
ccefe4c4 | 35 | #include "psympriv.h" |
e4c5f296 | 36 | #include "complaints.h" |
29f77997 | 37 | #include "gdb_bfd.h" |
a80b95ba TG |
38 | |
39 | #include <string.h> | |
40 | ||
41 | /* If non-zero displays debugging message. */ | |
ccce17b0 | 42 | static unsigned int mach_o_debug_level = 0; |
a80b95ba | 43 | |
a80b95ba TG |
44 | /* Dwarf debugging information are never in the final executable. They stay |
45 | in object files and the executable contains the list of object files read | |
46 | during the link. | |
47 | Each time an oso (other source) is found in the executable, the reader | |
48 | creates such a structure. They are read after the processing of the | |
025bb325 MS |
49 | executable. */ |
50 | ||
a80b95ba TG |
51 | typedef struct oso_el |
52 | { | |
e4c5f296 | 53 | /* Object file name. Can also be a member name. */ |
a80b95ba TG |
54 | const char *name; |
55 | ||
56 | /* Associated time stamp. */ | |
57 | unsigned long mtime; | |
58 | ||
e4c5f296 TG |
59 | /* Stab symbols range for this OSO. */ |
60 | asymbol **oso_sym; | |
61 | asymbol **end_sym; | |
a80b95ba | 62 | |
e4c5f296 TG |
63 | /* Number of interesting stabs in the range. */ |
64 | unsigned int nbr_syms; | |
a80b95ba TG |
65 | } |
66 | oso_el; | |
67 | ||
2d33f7b8 TG |
68 | /* Vector of object files to be read after the executable. This is one |
69 | global variable but it's life-time is the one of macho_symfile_read. */ | |
a80b95ba TG |
70 | DEF_VEC_O (oso_el); |
71 | static VEC (oso_el) *oso_vector; | |
72 | ||
2d33f7b8 TG |
73 | static void |
74 | macho_new_init (struct objfile *objfile) | |
75 | { | |
76 | } | |
77 | ||
78 | static void | |
79 | macho_symfile_init (struct objfile *objfile) | |
80 | { | |
81 | objfile->flags |= OBJF_REORDERED; | |
2d33f7b8 TG |
82 | } |
83 | ||
84 | /* Add a new OSO to the vector of OSO to load. */ | |
f192ea96 | 85 | |
a80b95ba | 86 | static void |
e4c5f296 TG |
87 | macho_register_oso (struct objfile *objfile, |
88 | asymbol **oso_sym, asymbol **end_sym, | |
89 | unsigned int nbr_syms) | |
a80b95ba TG |
90 | { |
91 | oso_el el; | |
92 | ||
e4c5f296 TG |
93 | el.name = (*oso_sym)->name; |
94 | el.mtime = (*oso_sym)->value; | |
95 | el.oso_sym = oso_sym; | |
96 | el.end_sym = end_sym; | |
97 | el.nbr_syms = nbr_syms; | |
a80b95ba TG |
98 | VEC_safe_push (oso_el, oso_vector, &el); |
99 | } | |
100 | ||
e4c5f296 TG |
101 | /* Add symbol SYM to the minimal symbol table of OBJFILE. */ |
102 | ||
103 | static void | |
104 | macho_symtab_add_minsym (struct objfile *objfile, const asymbol *sym) | |
105 | { | |
106 | if (sym->name == NULL || *sym->name == '\0') | |
107 | { | |
108 | /* Skip names that don't exist (shouldn't happen), or names | |
109 | that are null strings (may happen). */ | |
110 | return; | |
111 | } | |
112 | ||
113 | if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) | |
114 | { | |
115 | CORE_ADDR symaddr; | |
116 | CORE_ADDR offset; | |
117 | enum minimal_symbol_type ms_type; | |
118 | ||
119 | offset = ANOFFSET (objfile->section_offsets, sym->section->index); | |
120 | ||
121 | /* Bfd symbols are section relative. */ | |
122 | symaddr = sym->value + sym->section->vma; | |
123 | ||
124 | /* Select global/local/weak symbols. Note that bfd puts abs | |
125 | symbols in their own section, so all symbols we are | |
126 | interested in will have a section. */ | |
127 | /* Relocate all non-absolute and non-TLS symbols by the | |
128 | section offset. */ | |
45dfa85a | 129 | if (sym->section != bfd_abs_section_ptr |
e4c5f296 TG |
130 | && !(sym->section->flags & SEC_THREAD_LOCAL)) |
131 | symaddr += offset; | |
132 | ||
45dfa85a | 133 | if (sym->section == bfd_abs_section_ptr) |
e4c5f296 TG |
134 | ms_type = mst_abs; |
135 | else if (sym->section->flags & SEC_CODE) | |
136 | { | |
137 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
138 | ms_type = mst_text; | |
139 | else | |
140 | ms_type = mst_file_text; | |
141 | } | |
142 | else if (sym->section->flags & SEC_ALLOC) | |
143 | { | |
144 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
145 | { | |
146 | if (sym->section->flags & SEC_LOAD) | |
147 | ms_type = mst_data; | |
148 | else | |
149 | ms_type = mst_bss; | |
150 | } | |
151 | else if (sym->flags & BSF_LOCAL) | |
152 | { | |
153 | /* Not a special stabs-in-elf symbol, do regular | |
154 | symbol processing. */ | |
155 | if (sym->section->flags & SEC_LOAD) | |
156 | ms_type = mst_file_data; | |
157 | else | |
158 | ms_type = mst_file_bss; | |
159 | } | |
160 | else | |
161 | ms_type = mst_unknown; | |
162 | } | |
163 | else | |
164 | return; /* Skip this symbol. */ | |
165 | ||
166 | prim_record_minimal_symbol_and_info | |
167 | (sym->name, symaddr, ms_type, sym->section->index, | |
168 | sym->section, objfile); | |
169 | } | |
170 | } | |
171 | ||
a80b95ba | 172 | /* Build the minimal symbol table from SYMBOL_TABLE of length |
e4c5f296 | 173 | NUMBER_OF_SYMBOLS for OBJFILE. Registers OSO filenames found. */ |
f192ea96 | 174 | |
a80b95ba TG |
175 | static void |
176 | macho_symtab_read (struct objfile *objfile, | |
177 | long number_of_symbols, asymbol **symbol_table) | |
178 | { | |
e4c5f296 TG |
179 | long i; |
180 | const asymbol *dir_so = NULL; | |
181 | const asymbol *file_so = NULL; | |
182 | asymbol **oso_file = NULL; | |
b0d32fb6 | 183 | unsigned int nbr_syms = 0; |
a80b95ba | 184 | |
e4c5f296 TG |
185 | /* Current state while reading stabs. */ |
186 | enum | |
187 | { | |
188 | /* Not within an SO part. Only non-debugging symbols should be present, | |
189 | and will be added to the minimal symbols table. */ | |
190 | S_NO_SO, | |
bb00b29d | 191 | |
e4c5f296 TG |
192 | /* First SO read. Introduce an SO section, and may be followed by a second |
193 | SO. The SO section should contain onl debugging symbols. */ | |
194 | S_FIRST_SO, | |
a80b95ba | 195 | |
e4c5f296 TG |
196 | /* Second non-null SO found, just after the first one. Means that the first |
197 | is in fact a directory name. */ | |
198 | S_SECOND_SO, | |
a80b95ba | 199 | |
e4c5f296 TG |
200 | /* Non-null OSO found. Debugging info are DWARF in this OSO file. */ |
201 | S_DWARF_FILE, | |
3188d986 | 202 | |
e4c5f296 TG |
203 | S_STAB_FILE |
204 | } state = S_NO_SO; | |
a80b95ba | 205 | |
e4c5f296 TG |
206 | for (i = 0; i < number_of_symbols; i++) |
207 | { | |
208 | const asymbol *sym = symbol_table[i]; | |
209 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
a80b95ba | 210 | |
e4c5f296 TG |
211 | switch (state) |
212 | { | |
213 | case S_NO_SO: | |
214 | if (mach_o_sym->n_type == N_SO) | |
215 | { | |
216 | /* Start of object stab. */ | |
217 | if (sym->name == NULL || sym->name[0] == 0) | |
218 | { | |
219 | /* Unexpected empty N_SO. */ | |
220 | complaint (&symfile_complaints, | |
221 | _("Unexpected empty N_SO stab")); | |
222 | } | |
223 | else | |
224 | { | |
225 | file_so = sym; | |
226 | dir_so = NULL; | |
227 | state = S_FIRST_SO; | |
228 | } | |
229 | } | |
230 | else if (sym->flags & BSF_DEBUGGING) | |
231 | { | |
13b8d0c6 TG |
232 | if (mach_o_sym->n_type == N_OPT) |
233 | { | |
234 | /* No complaint for OPT. */ | |
235 | break; | |
236 | } | |
237 | ||
e4c5f296 TG |
238 | /* Debugging symbols are not expected here. */ |
239 | complaint (&symfile_complaints, | |
13b8d0c6 TG |
240 | _("%s: Unexpected debug stab outside SO markers"), |
241 | objfile->name); | |
e4c5f296 TG |
242 | } |
243 | else | |
244 | { | |
245 | /* Non-debugging symbols go to the minimal symbol table. */ | |
246 | macho_symtab_add_minsym (objfile, sym); | |
247 | } | |
248 | break; | |
a80b95ba | 249 | |
e4c5f296 TG |
250 | case S_FIRST_SO: |
251 | case S_SECOND_SO: | |
252 | if (mach_o_sym->n_type == N_SO) | |
253 | { | |
254 | if (sym->name == NULL || sym->name[0] == 0) | |
255 | { | |
256 | /* Unexpected empty N_SO. */ | |
257 | complaint (&symfile_complaints, _("Empty SO section")); | |
258 | state = S_NO_SO; | |
259 | } | |
260 | else if (state == S_FIRST_SO) | |
261 | { | |
262 | /* Second SO stab for the file name. */ | |
263 | dir_so = file_so; | |
264 | file_so = sym; | |
265 | state = S_SECOND_SO; | |
266 | } | |
267 | else | |
268 | complaint (&symfile_complaints, _("Three SO in a raw")); | |
269 | } | |
270 | else if (mach_o_sym->n_type == N_OSO) | |
271 | { | |
272 | if (sym->name == NULL || sym->name[0] == 0) | |
273 | { | |
274 | /* Empty OSO. Means that this file was compiled with | |
275 | stabs. */ | |
276 | state = S_STAB_FILE; | |
277 | warning (_("stabs debugging not supported for %s"), | |
278 | file_so->name); | |
279 | } | |
280 | else | |
281 | { | |
282 | /* Non-empty OSO for a Dwarf file. */ | |
283 | oso_file = symbol_table + i; | |
284 | nbr_syms = 0; | |
285 | state = S_DWARF_FILE; | |
286 | } | |
287 | } | |
288 | else | |
289 | complaint (&symfile_complaints, | |
290 | _("Unexpected stab after SO")); | |
291 | break; | |
a80b95ba | 292 | |
e4c5f296 TG |
293 | case S_STAB_FILE: |
294 | case S_DWARF_FILE: | |
295 | if (mach_o_sym->n_type == N_SO) | |
296 | { | |
297 | if (sym->name == NULL || sym->name[0] == 0) | |
298 | { | |
299 | /* End of file. */ | |
300 | if (state == S_DWARF_FILE) | |
301 | macho_register_oso (objfile, oso_file, symbol_table + i, | |
302 | nbr_syms); | |
303 | state = S_NO_SO; | |
304 | } | |
305 | else | |
306 | { | |
307 | complaint (&symfile_complaints, _("Missing nul SO")); | |
308 | file_so = sym; | |
309 | dir_so = NULL; | |
310 | state = S_FIRST_SO; | |
311 | } | |
312 | } | |
313 | else if (sym->flags & BSF_DEBUGGING) | |
314 | { | |
315 | if (state == S_STAB_FILE) | |
316 | { | |
317 | /* FIXME: to be implemented. */ | |
318 | } | |
319 | else | |
320 | { | |
321 | switch (mach_o_sym->n_type) | |
322 | { | |
323 | case N_FUN: | |
324 | if (sym->name == NULL || sym->name[0] == 0) | |
325 | break; | |
326 | /* Fall through. */ | |
327 | case N_STSYM: | |
328 | /* Interesting symbol. */ | |
329 | nbr_syms++; | |
330 | break; | |
331 | case N_ENSYM: | |
332 | case N_BNSYM: | |
333 | case N_GSYM: | |
334 | break; | |
335 | default: | |
336 | complaint (&symfile_complaints, | |
337 | _("unhandled stab for dwarf OSO file")); | |
338 | break; | |
339 | } | |
340 | } | |
341 | } | |
342 | else | |
343 | complaint (&symfile_complaints, | |
344 | _("non-debugging symbol within SO")); | |
345 | break; | |
346 | } | |
a80b95ba TG |
347 | } |
348 | ||
e4c5f296 TG |
349 | if (state != S_NO_SO) |
350 | complaint (&symfile_complaints, _("missing nul SO")); | |
a80b95ba TG |
351 | } |
352 | ||
353 | /* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'), | |
354 | returns the length of the archive name. | |
355 | Returns -1 otherwise. */ | |
f192ea96 | 356 | |
a80b95ba TG |
357 | static int |
358 | get_archive_prefix_len (const char *name) | |
359 | { | |
360 | char *lparen; | |
361 | int name_len = strlen (name); | |
362 | ||
363 | if (name_len == 0 || name[name_len - 1] != ')') | |
364 | return -1; | |
e4c5f296 | 365 | |
a80b95ba TG |
366 | lparen = strrchr (name, '('); |
367 | if (lparen == NULL || lparen == name) | |
368 | return -1; | |
369 | return lparen - name; | |
370 | } | |
371 | ||
e4c5f296 TG |
372 | /* Compare function to qsort OSOs, so that members of a library are |
373 | gathered. */ | |
374 | ||
f192ea96 TG |
375 | static int |
376 | oso_el_compare_name (const void *vl, const void *vr) | |
377 | { | |
378 | const oso_el *l = (const oso_el *)vl; | |
379 | const oso_el *r = (const oso_el *)vr; | |
380 | ||
381 | return strcmp (l->name, r->name); | |
382 | } | |
383 | ||
e4c5f296 TG |
384 | /* Hash table entry structure for the stabs symbols in the main object file. |
385 | This is used to speed up lookup for symbols in the OSO. */ | |
38947cca | 386 | |
e4c5f296 TG |
387 | struct macho_sym_hash_entry |
388 | { | |
389 | struct bfd_hash_entry base; | |
390 | const asymbol *sym; | |
391 | }; | |
38947cca | 392 | |
e4c5f296 | 393 | /* Routine to create an entry in the hash table. */ |
38947cca | 394 | |
e4c5f296 TG |
395 | static struct bfd_hash_entry * |
396 | macho_sym_hash_newfunc (struct bfd_hash_entry *entry, | |
397 | struct bfd_hash_table *table, | |
398 | const char *string) | |
38947cca | 399 | { |
e4c5f296 TG |
400 | struct macho_sym_hash_entry *ret = (struct macho_sym_hash_entry *) entry; |
401 | ||
402 | /* Allocate the structure if it has not already been allocated by a | |
403 | subclass. */ | |
404 | if (ret == NULL) | |
405 | ret = (struct macho_sym_hash_entry *) bfd_hash_allocate (table, | |
406 | sizeof (* ret)); | |
407 | if (ret == NULL) | |
408 | return NULL; | |
38947cca | 409 | |
e4c5f296 TG |
410 | /* Call the allocation method of the superclass. */ |
411 | ret = (struct macho_sym_hash_entry *) | |
412 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string); | |
38947cca | 413 | |
e4c5f296 | 414 | if (ret) |
38947cca | 415 | { |
e4c5f296 TG |
416 | /* Initialize the local fields. */ |
417 | ret->sym = NULL; | |
418 | } | |
38947cca | 419 | |
e4c5f296 TG |
420 | return (struct bfd_hash_entry *) ret; |
421 | } | |
38947cca | 422 | |
e4c5f296 TG |
423 | /* Get the value of SYM from the minimal symtab of MAIN_OBJFILE. This is used |
424 | to get the value of global and common symbols. */ | |
38947cca | 425 | |
e4c5f296 TG |
426 | static CORE_ADDR |
427 | macho_resolve_oso_sym_with_minsym (struct objfile *main_objfile, asymbol *sym) | |
428 | { | |
429 | /* For common symbol and global symbols, use the min symtab. */ | |
430 | struct minimal_symbol *msym; | |
431 | const char *name = sym->name; | |
432 | ||
433 | if (name[0] == bfd_get_symbol_leading_char (main_objfile->obfd)) | |
434 | ++name; | |
435 | msym = lookup_minimal_symbol (name, NULL, main_objfile); | |
436 | if (msym == NULL) | |
437 | { | |
438 | warning (_("can't find symbol '%s' in minsymtab"), name); | |
439 | return 0; | |
38947cca | 440 | } |
e4c5f296 TG |
441 | else |
442 | return SYMBOL_VALUE_ADDRESS (msym); | |
38947cca JB |
443 | } |
444 | ||
e4c5f296 | 445 | /* Add oso file OSO/ABFD as a symbol file. */ |
f192ea96 TG |
446 | |
447 | static void | |
bdfed3bc TG |
448 | macho_add_oso_symfile (oso_el *oso, bfd *abfd, |
449 | struct objfile *main_objfile, int symfile_flags) | |
f192ea96 | 450 | { |
e4c5f296 | 451 | int storage; |
f192ea96 | 452 | int i; |
e4c5f296 TG |
453 | asymbol **symbol_table; |
454 | asymbol **symp; | |
455 | struct bfd_hash_table table; | |
456 | int nbr_sections; | |
8ac244b4 | 457 | struct cleanup *cleanup; |
e4c5f296 TG |
458 | |
459 | /* Per section flag to mark which section have been rebased. */ | |
460 | unsigned char *sections_rebased; | |
f192ea96 TG |
461 | |
462 | if (mach_o_debug_level > 0) | |
e4c5f296 TG |
463 | printf_unfiltered |
464 | (_("Loading debugging symbols from oso: %s\n"), oso->name); | |
2d33f7b8 | 465 | |
f192ea96 TG |
466 | if (!bfd_check_format (abfd, bfd_object)) |
467 | { | |
468 | warning (_("`%s': can't read symbols: %s."), oso->name, | |
469 | bfd_errmsg (bfd_get_error ())); | |
cbb099e8 | 470 | gdb_bfd_unref (abfd); |
f192ea96 TG |
471 | return; |
472 | } | |
473 | ||
e4c5f296 TG |
474 | if (abfd->my_archive == NULL && oso->mtime != bfd_get_mtime (abfd)) |
475 | { | |
476 | warning (_("`%s': file time stamp mismatch."), oso->name); | |
cbb099e8 | 477 | gdb_bfd_unref (abfd); |
e4c5f296 TG |
478 | return; |
479 | } | |
480 | ||
481 | if (!bfd_hash_table_init_n (&table, macho_sym_hash_newfunc, | |
482 | sizeof (struct macho_sym_hash_entry), | |
483 | oso->nbr_syms)) | |
484 | { | |
485 | warning (_("`%s': can't create hash table"), oso->name); | |
cbb099e8 | 486 | gdb_bfd_unref (abfd); |
e4c5f296 TG |
487 | return; |
488 | } | |
489 | ||
f192ea96 | 490 | bfd_set_cacheable (abfd, 1); |
f18b4cab | 491 | |
e4c5f296 TG |
492 | /* Read symbols table. */ |
493 | storage = bfd_get_symtab_upper_bound (abfd); | |
494 | symbol_table = (asymbol **) xmalloc (storage); | |
495 | bfd_canonicalize_symtab (abfd, symbol_table); | |
f192ea96 | 496 | |
e4c5f296 TG |
497 | /* Init section flags. */ |
498 | nbr_sections = bfd_count_sections (abfd); | |
499 | sections_rebased = (unsigned char *) alloca (nbr_sections); | |
500 | for (i = 0; i < nbr_sections; i++) | |
501 | sections_rebased[i] = 0; | |
f192ea96 | 502 | |
e4c5f296 TG |
503 | /* Put symbols for the OSO file in the hash table. */ |
504 | for (symp = oso->oso_sym; symp != oso->end_sym; symp++) | |
f192ea96 | 505 | { |
e4c5f296 TG |
506 | const asymbol *sym = *symp; |
507 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
f18b4cab | 508 | |
e4c5f296 | 509 | switch (mach_o_sym->n_type) |
f18b4cab | 510 | { |
e4c5f296 TG |
511 | case N_ENSYM: |
512 | case N_BNSYM: | |
513 | case N_GSYM: | |
514 | sym = NULL; | |
515 | break; | |
516 | case N_FUN: | |
517 | if (sym->name == NULL || sym->name[0] == 0) | |
518 | sym = NULL; | |
519 | break; | |
520 | case N_STSYM: | |
521 | break; | |
522 | default: | |
523 | sym = NULL; | |
524 | break; | |
525 | } | |
526 | if (sym != NULL) | |
527 | { | |
528 | struct macho_sym_hash_entry *ent; | |
529 | ||
530 | ent = (struct macho_sym_hash_entry *) | |
531 | bfd_hash_lookup (&table, sym->name, TRUE, FALSE); | |
532 | if (ent->sym != NULL) | |
533 | complaint (&symfile_complaints, | |
534 | _("Duplicated symbol %s in symbol table"), sym->name); | |
535 | else | |
f18b4cab | 536 | { |
e4c5f296 TG |
537 | if (mach_o_debug_level > 4) |
538 | { | |
539 | struct gdbarch *arch = get_objfile_arch (main_objfile); | |
540 | printf_unfiltered | |
541 | (_("Adding symbol %s (addr: %s)\n"), | |
542 | sym->name, paddress (arch, sym->value)); | |
543 | } | |
544 | ent->sym = sym; | |
f18b4cab | 545 | } |
f18b4cab | 546 | } |
e4c5f296 | 547 | } |
f18b4cab | 548 | |
e4c5f296 TG |
549 | /* Relocate symbols of the OSO. */ |
550 | for (i = 0; symbol_table[i]; i++) | |
551 | { | |
552 | asymbol *sym = symbol_table[i]; | |
553 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
554 | ||
555 | if (mach_o_sym->n_type & BFD_MACH_O_N_STAB) | |
556 | continue; | |
557 | if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF | |
558 | && sym->value != 0) | |
f18b4cab | 559 | { |
e4c5f296 TG |
560 | /* For common symbol use the min symtab and modify the OSO |
561 | symbol table. */ | |
562 | CORE_ADDR res; | |
563 | ||
564 | res = macho_resolve_oso_sym_with_minsym (main_objfile, sym); | |
565 | if (res != 0) | |
566 | { | |
45dfa85a | 567 | sym->section = bfd_com_section_ptr; |
e4c5f296 TG |
568 | sym->value = res; |
569 | } | |
f18b4cab | 570 | } |
e4c5f296 TG |
571 | else if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT) |
572 | { | |
573 | /* Normal symbol. */ | |
574 | asection *sec = sym->section; | |
575 | bfd_mach_o_section *msec; | |
576 | unsigned int sec_type; | |
577 | ||
578 | /* Skip buggy ones. */ | |
579 | if (sec == NULL || sections_rebased[sec->index] != 0) | |
580 | continue; | |
581 | ||
582 | /* Only consider regular, non-debugging sections. */ | |
583 | msec = bfd_mach_o_get_mach_o_section (sec); | |
584 | sec_type = msec->flags & BFD_MACH_O_SECTION_TYPE_MASK; | |
585 | if ((sec_type == BFD_MACH_O_S_REGULAR | |
586 | || sec_type == BFD_MACH_O_S_ZEROFILL) | |
587 | && (msec->flags & BFD_MACH_O_S_ATTR_DEBUG) == 0) | |
588 | { | |
589 | CORE_ADDR addr = 0; | |
590 | ||
591 | if ((mach_o_sym->n_type & BFD_MACH_O_N_EXT) != 0) | |
592 | { | |
593 | /* Use the min symtab for global symbols. */ | |
594 | addr = macho_resolve_oso_sym_with_minsym (main_objfile, sym); | |
595 | } | |
596 | else | |
597 | { | |
598 | struct macho_sym_hash_entry *ent; | |
599 | ||
600 | ent = (struct macho_sym_hash_entry *) | |
601 | bfd_hash_lookup (&table, sym->name, FALSE, FALSE); | |
602 | if (ent != NULL) | |
603 | addr = bfd_asymbol_value (ent->sym); | |
604 | } | |
f18b4cab | 605 | |
e4c5f296 TG |
606 | /* Adjust the section. */ |
607 | if (addr != 0) | |
608 | { | |
609 | CORE_ADDR res = addr - sym->value; | |
610 | ||
611 | if (mach_o_debug_level > 3) | |
612 | { | |
613 | struct gdbarch *arch = get_objfile_arch (main_objfile); | |
614 | printf_unfiltered | |
615 | (_("resolve sect %s with %s (set to %s)\n"), | |
616 | sec->name, sym->name, | |
617 | paddress (arch, res)); | |
618 | } | |
619 | bfd_set_section_vma (abfd, sec, res); | |
620 | sections_rebased[sec->index] = 1; | |
621 | } | |
622 | } | |
623 | else | |
624 | { | |
625 | /* Mark the section as never rebased. */ | |
626 | sections_rebased[sec->index] = 2; | |
627 | } | |
628 | } | |
f192ea96 TG |
629 | } |
630 | ||
e4c5f296 | 631 | bfd_hash_table_free (&table); |
38947cca | 632 | |
bdfed3bc TG |
633 | /* We need to clear SYMFILE_MAINLINE to avoid interractive question |
634 | from symfile.c:symbol_file_add_with_addrs_or_offsets. */ | |
8ac244b4 | 635 | cleanup = make_cleanup_bfd_unref (abfd); |
e4c5f296 | 636 | symbol_file_add_from_bfd |
f18b4cab | 637 | (abfd, symfile_flags & ~(SYMFILE_MAINLINE | SYMFILE_VERBOSE), NULL, |
bdfed3bc | 638 | main_objfile->flags & (OBJF_REORDERED | OBJF_SHARED |
63524580 JK |
639 | | OBJF_READNOW | OBJF_USERLOADED), |
640 | main_objfile); | |
8ac244b4 | 641 | do_cleanups (cleanup); |
f192ea96 TG |
642 | } |
643 | ||
a80b95ba | 644 | /* Read symbols from the vector of oso files. */ |
f192ea96 | 645 | |
a80b95ba | 646 | static void |
2d33f7b8 | 647 | macho_symfile_read_all_oso (struct objfile *main_objfile, int symfile_flags) |
a80b95ba TG |
648 | { |
649 | int ix; | |
650 | VEC (oso_el) *vec; | |
651 | oso_el *oso; | |
a4453b7e | 652 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); |
a80b95ba TG |
653 | |
654 | vec = oso_vector; | |
655 | oso_vector = NULL; | |
e4c5f296 | 656 | |
f192ea96 TG |
657 | /* Sort oso by name so that files from libraries are gathered. */ |
658 | qsort (VEC_address (oso_el, vec), VEC_length (oso_el, vec), | |
659 | sizeof (oso_el), oso_el_compare_name); | |
a80b95ba | 660 | |
f192ea96 | 661 | for (ix = 0; VEC_iterate (oso_el, vec, ix, oso);) |
a80b95ba | 662 | { |
a80b95ba | 663 | int pfx_len; |
e4c5f296 | 664 | |
a80b95ba TG |
665 | /* Check if this is a library name. */ |
666 | pfx_len = get_archive_prefix_len (oso->name); | |
667 | if (pfx_len > 0) | |
668 | { | |
669 | bfd *archive_bfd; | |
670 | bfd *member_bfd; | |
f192ea96 TG |
671 | char *archive_name = XNEWVEC (char, pfx_len + 1); |
672 | int last_ix; | |
673 | oso_el *oso2; | |
674 | int ix2; | |
a80b95ba | 675 | |
a80b95ba TG |
676 | memcpy (archive_name, oso->name, pfx_len); |
677 | archive_name[pfx_len] = '\0'; | |
678 | ||
a4453b7e TT |
679 | make_cleanup (xfree, archive_name); |
680 | ||
f192ea96 TG |
681 | /* Compute number of oso for this archive. */ |
682 | for (last_ix = ix; | |
683 | VEC_iterate (oso_el, vec, last_ix, oso2); last_ix++) | |
684 | { | |
685 | if (strncmp (oso2->name, archive_name, pfx_len) != 0) | |
686 | break; | |
687 | } | |
e4c5f296 | 688 | |
a80b95ba | 689 | /* Open the archive and check the format. */ |
1c00ec6b | 690 | archive_bfd = gdb_bfd_open (archive_name, gnutarget, -1); |
a80b95ba TG |
691 | if (archive_bfd == NULL) |
692 | { | |
693 | warning (_("Could not open OSO archive file \"%s\""), | |
694 | archive_name); | |
f192ea96 | 695 | ix = last_ix; |
a80b95ba TG |
696 | continue; |
697 | } | |
698 | if (!bfd_check_format (archive_bfd, bfd_archive)) | |
699 | { | |
700 | warning (_("OSO archive file \"%s\" not an archive."), | |
701 | archive_name); | |
cbb099e8 | 702 | gdb_bfd_unref (archive_bfd); |
f192ea96 | 703 | ix = last_ix; |
a80b95ba TG |
704 | continue; |
705 | } | |
a4453b7e | 706 | |
64c31149 | 707 | member_bfd = gdb_bfd_openr_next_archived_file (archive_bfd, NULL); |
e4c5f296 | 708 | |
a80b95ba TG |
709 | if (member_bfd == NULL) |
710 | { | |
711 | warning (_("Could not read archive members out of " | |
712 | "OSO archive \"%s\""), archive_name); | |
cbb099e8 | 713 | gdb_bfd_unref (archive_bfd); |
f192ea96 | 714 | ix = last_ix; |
a80b95ba TG |
715 | continue; |
716 | } | |
f192ea96 TG |
717 | |
718 | /* Load all oso in this library. */ | |
a80b95ba TG |
719 | while (member_bfd != NULL) |
720 | { | |
f192ea96 | 721 | bfd *prev; |
a80b95ba | 722 | const char *member_name = member_bfd->filename; |
f192ea96 TG |
723 | int member_len = strlen (member_name); |
724 | ||
ab7e10a0 | 725 | /* If this member is referenced, add it as a symfile. */ |
f192ea96 TG |
726 | for (ix2 = ix; ix2 < last_ix; ix2++) |
727 | { | |
728 | oso2 = VEC_index (oso_el, vec, ix2); | |
729 | ||
730 | if (oso2->name | |
731 | && strlen (oso2->name) == pfx_len + member_len + 2 | |
732 | && !memcmp (member_name, oso2->name + pfx_len + 1, | |
733 | member_len)) | |
734 | { | |
bdfed3bc TG |
735 | macho_add_oso_symfile (oso2, member_bfd, |
736 | main_objfile, symfile_flags); | |
f192ea96 TG |
737 | oso2->name = NULL; |
738 | break; | |
739 | } | |
740 | } | |
741 | ||
742 | prev = member_bfd; | |
64c31149 TT |
743 | member_bfd = gdb_bfd_openr_next_archived_file (archive_bfd, |
744 | member_bfd); | |
ab7e10a0 TG |
745 | |
746 | /* Free previous member if not referenced by an oso. */ | |
747 | if (ix2 >= last_ix) | |
cbb099e8 | 748 | gdb_bfd_unref (prev); |
a80b95ba | 749 | } |
f192ea96 TG |
750 | for (ix2 = ix; ix2 < last_ix; ix2++) |
751 | { | |
752 | oso_el *oso2 = VEC_index (oso_el, vec, ix2); | |
753 | ||
754 | if (oso2->name != NULL) | |
755 | warning (_("Could not find specified archive member " | |
756 | "for OSO name \"%s\""), oso->name); | |
757 | } | |
758 | ix = last_ix; | |
a80b95ba TG |
759 | } |
760 | else | |
761 | { | |
f192ea96 | 762 | bfd *abfd; |
a80b95ba | 763 | |
1c00ec6b | 764 | abfd = gdb_bfd_open (oso->name, gnutarget, -1); |
a80b95ba | 765 | if (!abfd) |
f192ea96 TG |
766 | warning (_("`%s': can't open to read symbols: %s."), oso->name, |
767 | bfd_errmsg (bfd_get_error ())); | |
768 | else | |
bdfed3bc | 769 | macho_add_oso_symfile (oso, abfd, main_objfile, symfile_flags); |
f192ea96 TG |
770 | |
771 | ix++; | |
772 | } | |
773 | } | |
774 | ||
a80b95ba | 775 | VEC_free (oso_el, vec); |
a4453b7e | 776 | do_cleanups (cleanup); |
a80b95ba TG |
777 | } |
778 | ||
779 | /* DSYM (debug symbols) files contain the debug info of an executable. | |
780 | This is a separate file created by dsymutil(1) and is similar to debug | |
781 | link feature on ELF. | |
782 | DSYM files are located in a subdirectory. Append DSYM_SUFFIX to the | |
783 | executable name and the executable base name to get the DSYM file name. */ | |
784 | #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/" | |
785 | ||
786 | /* Check if a dsym file exists for OBJFILE. If so, returns a bfd for it. | |
787 | Return NULL if no valid dsym file is found. */ | |
f192ea96 | 788 | |
a80b95ba TG |
789 | static bfd * |
790 | macho_check_dsym (struct objfile *objfile) | |
791 | { | |
792 | size_t name_len = strlen (objfile->name); | |
793 | size_t dsym_len = strlen (DSYM_SUFFIX); | |
794 | const char *base_name = lbasename (objfile->name); | |
795 | size_t base_len = strlen (base_name); | |
796 | char *dsym_filename = alloca (name_len + dsym_len + base_len + 1); | |
797 | bfd *dsym_bfd; | |
65ccb109 TG |
798 | bfd_mach_o_load_command *main_uuid; |
799 | bfd_mach_o_load_command *dsym_uuid; | |
a80b95ba TG |
800 | |
801 | strcpy (dsym_filename, objfile->name); | |
802 | strcpy (dsym_filename + name_len, DSYM_SUFFIX); | |
803 | strcpy (dsym_filename + name_len + dsym_len, base_name); | |
804 | ||
805 | if (access (dsym_filename, R_OK) != 0) | |
806 | return NULL; | |
807 | ||
65ccb109 TG |
808 | if (bfd_mach_o_lookup_command (objfile->obfd, |
809 | BFD_MACH_O_LC_UUID, &main_uuid) == 0) | |
a80b95ba TG |
810 | { |
811 | warning (_("can't find UUID in %s"), objfile->name); | |
812 | return NULL; | |
813 | } | |
64c31149 | 814 | dsym_bfd = gdb_bfd_openr (dsym_filename, gnutarget); |
a80b95ba TG |
815 | if (dsym_bfd == NULL) |
816 | { | |
817 | warning (_("can't open dsym file %s"), dsym_filename); | |
a80b95ba TG |
818 | return NULL; |
819 | } | |
820 | ||
821 | if (!bfd_check_format (dsym_bfd, bfd_object)) | |
822 | { | |
cbb099e8 | 823 | gdb_bfd_unref (dsym_bfd); |
a80b95ba | 824 | warning (_("bad dsym file format: %s"), bfd_errmsg (bfd_get_error ())); |
a80b95ba TG |
825 | return NULL; |
826 | } | |
827 | ||
65ccb109 TG |
828 | if (bfd_mach_o_lookup_command (dsym_bfd, |
829 | BFD_MACH_O_LC_UUID, &dsym_uuid) == 0) | |
a80b95ba TG |
830 | { |
831 | warning (_("can't find UUID in %s"), dsym_filename); | |
cbb099e8 | 832 | gdb_bfd_unref (dsym_bfd); |
a80b95ba TG |
833 | return NULL; |
834 | } | |
65ccb109 TG |
835 | if (memcmp (dsym_uuid->command.uuid.uuid, main_uuid->command.uuid.uuid, |
836 | sizeof (main_uuid->command.uuid.uuid))) | |
a80b95ba TG |
837 | { |
838 | warning (_("dsym file UUID doesn't match the one in %s"), objfile->name); | |
cbb099e8 | 839 | gdb_bfd_unref (dsym_bfd); |
a80b95ba TG |
840 | return NULL; |
841 | } | |
842 | return dsym_bfd; | |
a80b95ba TG |
843 | } |
844 | ||
845 | static void | |
f4352531 | 846 | macho_symfile_read (struct objfile *objfile, int symfile_flags) |
a80b95ba TG |
847 | { |
848 | bfd *abfd = objfile->obfd; | |
a80b95ba TG |
849 | CORE_ADDR offset; |
850 | long storage_needed; | |
851 | bfd *dsym_bfd; | |
852 | ||
a80b95ba TG |
853 | /* Get symbols from the symbol table only if the file is an executable. |
854 | The symbol table of object files is not relocated and is expected to | |
855 | be in the executable. */ | |
cf1061c0 | 856 | if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) |
a80b95ba TG |
857 | { |
858 | /* Process the normal symbol table first. */ | |
859 | storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); | |
860 | if (storage_needed < 0) | |
861 | error (_("Can't read symbols from %s: %s"), | |
862 | bfd_get_filename (objfile->obfd), | |
863 | bfd_errmsg (bfd_get_error ())); | |
864 | ||
865 | if (storage_needed > 0) | |
866 | { | |
867 | asymbol **symbol_table; | |
868 | long symcount; | |
e4c5f296 | 869 | struct cleanup *back_to; |
a80b95ba TG |
870 | |
871 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
872 | make_cleanup (xfree, symbol_table); | |
e4c5f296 TG |
873 | |
874 | init_minimal_symbol_collection (); | |
875 | back_to = make_cleanup_discard_minimal_symbols (); | |
876 | ||
a80b95ba | 877 | symcount = bfd_canonicalize_symtab (objfile->obfd, symbol_table); |
e4c5f296 | 878 | |
a80b95ba TG |
879 | if (symcount < 0) |
880 | error (_("Can't read symbols from %s: %s"), | |
881 | bfd_get_filename (objfile->obfd), | |
882 | bfd_errmsg (bfd_get_error ())); | |
e4c5f296 | 883 | |
a80b95ba | 884 | macho_symtab_read (objfile, symcount, symbol_table); |
e4c5f296 TG |
885 | |
886 | install_minimal_symbols (objfile); | |
887 | do_cleanups (back_to); | |
a80b95ba | 888 | } |
a80b95ba | 889 | |
cf1061c0 TG |
890 | /* Try to read .eh_frame / .debug_frame. */ |
891 | /* First, locate these sections. We ignore the result status | |
892 | as it only checks for debug info. */ | |
251d32d9 | 893 | dwarf2_has_info (objfile, NULL); |
cf1061c0 | 894 | dwarf2_build_frame_info (objfile); |
e4c5f296 | 895 | |
a80b95ba TG |
896 | /* Check for DSYM file. */ |
897 | dsym_bfd = macho_check_dsym (objfile); | |
898 | if (dsym_bfd != NULL) | |
899 | { | |
900 | int ix; | |
901 | oso_el *oso; | |
6414f3fd | 902 | struct bfd_section *asect, *dsect; |
8ac244b4 | 903 | struct cleanup *cleanup; |
a80b95ba TG |
904 | |
905 | if (mach_o_debug_level > 0) | |
906 | printf_unfiltered (_("dsym file found\n")); | |
907 | ||
908 | /* Remove oso. They won't be used. */ | |
a80b95ba TG |
909 | VEC_free (oso_el, oso_vector); |
910 | oso_vector = NULL; | |
911 | ||
6414f3fd TG |
912 | /* Set dsym section size. */ |
913 | for (asect = objfile->obfd->sections, dsect = dsym_bfd->sections; | |
914 | asect && dsect; | |
915 | asect = asect->next, dsect = dsect->next) | |
916 | { | |
917 | if (strcmp (asect->name, dsect->name) != 0) | |
918 | break; | |
919 | bfd_set_section_size (dsym_bfd, dsect, | |
920 | bfd_get_section_size (asect)); | |
921 | } | |
922 | ||
2480cfa0 | 923 | /* Add the dsym file as a separate file. */ |
8ac244b4 | 924 | cleanup = make_cleanup_bfd_unref (dsym_bfd); |
2480cfa0 | 925 | symbol_file_add_separate (dsym_bfd, symfile_flags, objfile); |
8ac244b4 | 926 | do_cleanups (cleanup); |
e4c5f296 | 927 | |
cf1061c0 | 928 | /* Don't try to read dwarf2 from main file or shared libraries. */ |
2480cfa0 | 929 | return; |
a80b95ba TG |
930 | } |
931 | } | |
932 | ||
251d32d9 | 933 | if (dwarf2_has_info (objfile, NULL)) |
a80b95ba TG |
934 | { |
935 | /* DWARF 2 sections */ | |
f29dff0a | 936 | dwarf2_build_psymtabs (objfile); |
a80b95ba TG |
937 | } |
938 | ||
a80b95ba TG |
939 | /* Then the oso. */ |
940 | if (oso_vector != NULL) | |
2d33f7b8 | 941 | macho_symfile_read_all_oso (objfile, symfile_flags); |
a80b95ba TG |
942 | } |
943 | ||
f18b4cab TG |
944 | static bfd_byte * |
945 | macho_symfile_relocate (struct objfile *objfile, asection *sectp, | |
946 | bfd_byte *buf) | |
947 | { | |
948 | bfd *abfd = objfile->obfd; | |
949 | ||
950 | /* We're only interested in sections with relocation | |
951 | information. */ | |
952 | if ((sectp->flags & SEC_RELOC) == 0) | |
953 | return NULL; | |
954 | ||
955 | if (mach_o_debug_level > 0) | |
956 | printf_unfiltered (_("Relocate section '%s' of %s\n"), | |
957 | sectp->name, objfile->name); | |
958 | ||
f18b4cab TG |
959 | return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); |
960 | } | |
961 | ||
a80b95ba TG |
962 | static void |
963 | macho_symfile_finish (struct objfile *objfile) | |
964 | { | |
965 | } | |
966 | ||
967 | static void | |
968 | macho_symfile_offsets (struct objfile *objfile, | |
969 | struct section_addr_info *addrs) | |
970 | { | |
971 | unsigned int i; | |
972 | unsigned int num_sections; | |
973 | struct obj_section *osect; | |
974 | ||
975 | /* Allocate section_offsets. */ | |
976 | objfile->num_sections = bfd_count_sections (objfile->obfd); | |
977 | objfile->section_offsets = (struct section_offsets *) | |
978 | obstack_alloc (&objfile->objfile_obstack, | |
979 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
980 | memset (objfile->section_offsets, 0, | |
981 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
982 | ||
983 | /* This code is run when we first add the objfile with | |
984 | symfile_add_with_addrs_or_offsets, when "addrs" not "offsets" are | |
985 | passed in. The place in symfile.c where the addrs are applied | |
986 | depends on the addrs having section names. But in the dyld code | |
987 | we build an anonymous array of addrs, so that code is a no-op. | |
988 | Because of that, we have to apply the addrs to the sections here. | |
989 | N.B. if an objfile slides after we've already created it, then it | |
990 | goes through objfile_relocate. */ | |
991 | ||
992 | for (i = 0; i < addrs->num_sections; i++) | |
993 | { | |
994 | if (addrs->other[i].name == NULL) | |
995 | continue; | |
996 | ||
997 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
998 | { | |
999 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
1000 | ||
1001 | if (strcmp (bfd_sect_name, addrs->other[i].name) == 0) | |
1002 | { | |
1003 | obj_section_offset (osect) = addrs->other[i].addr; | |
1004 | break; | |
1005 | } | |
1006 | } | |
1007 | } | |
1008 | ||
1009 | objfile->sect_index_text = 0; | |
1010 | ||
1011 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
1012 | { | |
1013 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
1014 | int sect_index = osect->the_bfd_section->index; | |
e4c5f296 | 1015 | |
cf1061c0 TG |
1016 | if (strncmp (bfd_sect_name, "LC_SEGMENT.", 11) == 0) |
1017 | bfd_sect_name += 11; | |
1018 | if (strcmp (bfd_sect_name, "__TEXT") == 0 | |
1019 | || strcmp (bfd_sect_name, "__TEXT.__text") == 0) | |
a80b95ba TG |
1020 | objfile->sect_index_text = sect_index; |
1021 | } | |
1022 | } | |
1023 | ||
00b5771c | 1024 | static const struct sym_fns macho_sym_fns = { |
a80b95ba TG |
1025 | bfd_target_mach_o_flavour, |
1026 | ||
3e43a32a MS |
1027 | macho_new_init, /* init anything gbl to entire symtab */ |
1028 | macho_symfile_init, /* read initial info, setup for sym_read() */ | |
1029 | macho_symfile_read, /* read a symbol file into symtab */ | |
b11896a5 | 1030 | NULL, /* sym_read_psymbols */ |
3e43a32a MS |
1031 | macho_symfile_finish, /* finished with file, cleanup */ |
1032 | macho_symfile_offsets, /* xlate external to internal form */ | |
1033 | default_symfile_segments, /* Get segment information from a file. */ | |
1034 | NULL, | |
1035 | macho_symfile_relocate, /* Relocate a debug section. */ | |
55aa24fb | 1036 | NULL, /* sym_get_probes */ |
00b5771c | 1037 | &psym_functions |
a80b95ba TG |
1038 | }; |
1039 | ||
c381a3f6 JB |
1040 | /* -Wmissing-prototypes */ |
1041 | extern initialize_file_ftype _initialize_machoread; | |
1042 | ||
a80b95ba TG |
1043 | void |
1044 | _initialize_machoread () | |
1045 | { | |
1046 | add_symtab_fns (&macho_sym_fns); | |
1047 | ||
ccce17b0 YQ |
1048 | add_setshow_zuinteger_cmd ("mach-o", class_obscure, |
1049 | &mach_o_debug_level, | |
1050 | _("Set if printing Mach-O symbols processing."), | |
1051 | _("Show if printing Mach-O symbols processing."), | |
1052 | NULL, NULL, NULL, | |
1053 | &setdebuglist, &showdebuglist); | |
a80b95ba | 1054 | } |