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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
0b302171 | 2 | Copyright (C) 2008-2012 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. */ | |
42 | static int mach_o_debug_level = 0; | |
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; | |
82 | init_entry_point_info (objfile); | |
83 | } | |
84 | ||
85 | /* Add a new OSO to the vector of OSO to load. */ | |
f192ea96 | 86 | |
a80b95ba | 87 | static void |
e4c5f296 TG |
88 | macho_register_oso (struct objfile *objfile, |
89 | asymbol **oso_sym, asymbol **end_sym, | |
90 | unsigned int nbr_syms) | |
a80b95ba TG |
91 | { |
92 | oso_el el; | |
93 | ||
e4c5f296 TG |
94 | el.name = (*oso_sym)->name; |
95 | el.mtime = (*oso_sym)->value; | |
96 | el.oso_sym = oso_sym; | |
97 | el.end_sym = end_sym; | |
98 | el.nbr_syms = nbr_syms; | |
a80b95ba TG |
99 | VEC_safe_push (oso_el, oso_vector, &el); |
100 | } | |
101 | ||
e4c5f296 TG |
102 | /* Add symbol SYM to the minimal symbol table of OBJFILE. */ |
103 | ||
104 | static void | |
105 | macho_symtab_add_minsym (struct objfile *objfile, const asymbol *sym) | |
106 | { | |
107 | if (sym->name == NULL || *sym->name == '\0') | |
108 | { | |
109 | /* Skip names that don't exist (shouldn't happen), or names | |
110 | that are null strings (may happen). */ | |
111 | return; | |
112 | } | |
113 | ||
114 | if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) | |
115 | { | |
116 | CORE_ADDR symaddr; | |
117 | CORE_ADDR offset; | |
118 | enum minimal_symbol_type ms_type; | |
119 | ||
120 | offset = ANOFFSET (objfile->section_offsets, sym->section->index); | |
121 | ||
122 | /* Bfd symbols are section relative. */ | |
123 | symaddr = sym->value + sym->section->vma; | |
124 | ||
125 | /* Select global/local/weak symbols. Note that bfd puts abs | |
126 | symbols in their own section, so all symbols we are | |
127 | interested in will have a section. */ | |
128 | /* Relocate all non-absolute and non-TLS symbols by the | |
129 | section offset. */ | |
45dfa85a | 130 | if (sym->section != bfd_abs_section_ptr |
e4c5f296 TG |
131 | && !(sym->section->flags & SEC_THREAD_LOCAL)) |
132 | symaddr += offset; | |
133 | ||
45dfa85a | 134 | if (sym->section == bfd_abs_section_ptr) |
e4c5f296 TG |
135 | ms_type = mst_abs; |
136 | else if (sym->section->flags & SEC_CODE) | |
137 | { | |
138 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
139 | ms_type = mst_text; | |
140 | else | |
141 | ms_type = mst_file_text; | |
142 | } | |
143 | else if (sym->section->flags & SEC_ALLOC) | |
144 | { | |
145 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
146 | { | |
147 | if (sym->section->flags & SEC_LOAD) | |
148 | ms_type = mst_data; | |
149 | else | |
150 | ms_type = mst_bss; | |
151 | } | |
152 | else if (sym->flags & BSF_LOCAL) | |
153 | { | |
154 | /* Not a special stabs-in-elf symbol, do regular | |
155 | symbol processing. */ | |
156 | if (sym->section->flags & SEC_LOAD) | |
157 | ms_type = mst_file_data; | |
158 | else | |
159 | ms_type = mst_file_bss; | |
160 | } | |
161 | else | |
162 | ms_type = mst_unknown; | |
163 | } | |
164 | else | |
165 | return; /* Skip this symbol. */ | |
166 | ||
167 | prim_record_minimal_symbol_and_info | |
168 | (sym->name, symaddr, ms_type, sym->section->index, | |
169 | sym->section, objfile); | |
170 | } | |
171 | } | |
172 | ||
a80b95ba | 173 | /* Build the minimal symbol table from SYMBOL_TABLE of length |
e4c5f296 | 174 | NUMBER_OF_SYMBOLS for OBJFILE. Registers OSO filenames found. */ |
f192ea96 | 175 | |
a80b95ba TG |
176 | static void |
177 | macho_symtab_read (struct objfile *objfile, | |
178 | long number_of_symbols, asymbol **symbol_table) | |
179 | { | |
e4c5f296 TG |
180 | long i; |
181 | const asymbol *dir_so = NULL; | |
182 | const asymbol *file_so = NULL; | |
183 | asymbol **oso_file = NULL; | |
b0d32fb6 | 184 | unsigned int nbr_syms = 0; |
a80b95ba | 185 | |
e4c5f296 TG |
186 | /* Current state while reading stabs. */ |
187 | enum | |
188 | { | |
189 | /* Not within an SO part. Only non-debugging symbols should be present, | |
190 | and will be added to the minimal symbols table. */ | |
191 | S_NO_SO, | |
bb00b29d | 192 | |
e4c5f296 TG |
193 | /* First SO read. Introduce an SO section, and may be followed by a second |
194 | SO. The SO section should contain onl debugging symbols. */ | |
195 | S_FIRST_SO, | |
a80b95ba | 196 | |
e4c5f296 TG |
197 | /* Second non-null SO found, just after the first one. Means that the first |
198 | is in fact a directory name. */ | |
199 | S_SECOND_SO, | |
a80b95ba | 200 | |
e4c5f296 TG |
201 | /* Non-null OSO found. Debugging info are DWARF in this OSO file. */ |
202 | S_DWARF_FILE, | |
3188d986 | 203 | |
e4c5f296 TG |
204 | S_STAB_FILE |
205 | } state = S_NO_SO; | |
a80b95ba | 206 | |
e4c5f296 TG |
207 | for (i = 0; i < number_of_symbols; i++) |
208 | { | |
209 | const asymbol *sym = symbol_table[i]; | |
210 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
a80b95ba | 211 | |
e4c5f296 TG |
212 | switch (state) |
213 | { | |
214 | case S_NO_SO: | |
215 | if (mach_o_sym->n_type == N_SO) | |
216 | { | |
217 | /* Start of object stab. */ | |
218 | if (sym->name == NULL || sym->name[0] == 0) | |
219 | { | |
220 | /* Unexpected empty N_SO. */ | |
221 | complaint (&symfile_complaints, | |
222 | _("Unexpected empty N_SO stab")); | |
223 | } | |
224 | else | |
225 | { | |
226 | file_so = sym; | |
227 | dir_so = NULL; | |
228 | state = S_FIRST_SO; | |
229 | } | |
230 | } | |
231 | else if (sym->flags & BSF_DEBUGGING) | |
232 | { | |
13b8d0c6 TG |
233 | if (mach_o_sym->n_type == N_OPT) |
234 | { | |
235 | /* No complaint for OPT. */ | |
236 | break; | |
237 | } | |
238 | ||
e4c5f296 TG |
239 | /* Debugging symbols are not expected here. */ |
240 | complaint (&symfile_complaints, | |
13b8d0c6 TG |
241 | _("%s: Unexpected debug stab outside SO markers"), |
242 | objfile->name); | |
e4c5f296 TG |
243 | } |
244 | else | |
245 | { | |
246 | /* Non-debugging symbols go to the minimal symbol table. */ | |
247 | macho_symtab_add_minsym (objfile, sym); | |
248 | } | |
249 | break; | |
a80b95ba | 250 | |
e4c5f296 TG |
251 | case S_FIRST_SO: |
252 | case S_SECOND_SO: | |
253 | if (mach_o_sym->n_type == N_SO) | |
254 | { | |
255 | if (sym->name == NULL || sym->name[0] == 0) | |
256 | { | |
257 | /* Unexpected empty N_SO. */ | |
258 | complaint (&symfile_complaints, _("Empty SO section")); | |
259 | state = S_NO_SO; | |
260 | } | |
261 | else if (state == S_FIRST_SO) | |
262 | { | |
263 | /* Second SO stab for the file name. */ | |
264 | dir_so = file_so; | |
265 | file_so = sym; | |
266 | state = S_SECOND_SO; | |
267 | } | |
268 | else | |
269 | complaint (&symfile_complaints, _("Three SO in a raw")); | |
270 | } | |
271 | else if (mach_o_sym->n_type == N_OSO) | |
272 | { | |
273 | if (sym->name == NULL || sym->name[0] == 0) | |
274 | { | |
275 | /* Empty OSO. Means that this file was compiled with | |
276 | stabs. */ | |
277 | state = S_STAB_FILE; | |
278 | warning (_("stabs debugging not supported for %s"), | |
279 | file_so->name); | |
280 | } | |
281 | else | |
282 | { | |
283 | /* Non-empty OSO for a Dwarf file. */ | |
284 | oso_file = symbol_table + i; | |
285 | nbr_syms = 0; | |
286 | state = S_DWARF_FILE; | |
287 | } | |
288 | } | |
289 | else | |
290 | complaint (&symfile_complaints, | |
291 | _("Unexpected stab after SO")); | |
292 | break; | |
a80b95ba | 293 | |
e4c5f296 TG |
294 | case S_STAB_FILE: |
295 | case S_DWARF_FILE: | |
296 | if (mach_o_sym->n_type == N_SO) | |
297 | { | |
298 | if (sym->name == NULL || sym->name[0] == 0) | |
299 | { | |
300 | /* End of file. */ | |
301 | if (state == S_DWARF_FILE) | |
302 | macho_register_oso (objfile, oso_file, symbol_table + i, | |
303 | nbr_syms); | |
304 | state = S_NO_SO; | |
305 | } | |
306 | else | |
307 | { | |
308 | complaint (&symfile_complaints, _("Missing nul SO")); | |
309 | file_so = sym; | |
310 | dir_so = NULL; | |
311 | state = S_FIRST_SO; | |
312 | } | |
313 | } | |
314 | else if (sym->flags & BSF_DEBUGGING) | |
315 | { | |
316 | if (state == S_STAB_FILE) | |
317 | { | |
318 | /* FIXME: to be implemented. */ | |
319 | } | |
320 | else | |
321 | { | |
322 | switch (mach_o_sym->n_type) | |
323 | { | |
324 | case N_FUN: | |
325 | if (sym->name == NULL || sym->name[0] == 0) | |
326 | break; | |
327 | /* Fall through. */ | |
328 | case N_STSYM: | |
329 | /* Interesting symbol. */ | |
330 | nbr_syms++; | |
331 | break; | |
332 | case N_ENSYM: | |
333 | case N_BNSYM: | |
334 | case N_GSYM: | |
335 | break; | |
336 | default: | |
337 | complaint (&symfile_complaints, | |
338 | _("unhandled stab for dwarf OSO file")); | |
339 | break; | |
340 | } | |
341 | } | |
342 | } | |
343 | else | |
344 | complaint (&symfile_complaints, | |
345 | _("non-debugging symbol within SO")); | |
346 | break; | |
347 | } | |
a80b95ba TG |
348 | } |
349 | ||
e4c5f296 TG |
350 | if (state != S_NO_SO) |
351 | complaint (&symfile_complaints, _("missing nul SO")); | |
a80b95ba TG |
352 | } |
353 | ||
354 | /* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'), | |
355 | returns the length of the archive name. | |
356 | Returns -1 otherwise. */ | |
f192ea96 | 357 | |
a80b95ba TG |
358 | static int |
359 | get_archive_prefix_len (const char *name) | |
360 | { | |
361 | char *lparen; | |
362 | int name_len = strlen (name); | |
363 | ||
364 | if (name_len == 0 || name[name_len - 1] != ')') | |
365 | return -1; | |
e4c5f296 | 366 | |
a80b95ba TG |
367 | lparen = strrchr (name, '('); |
368 | if (lparen == NULL || lparen == name) | |
369 | return -1; | |
370 | return lparen - name; | |
371 | } | |
372 | ||
e4c5f296 TG |
373 | /* Compare function to qsort OSOs, so that members of a library are |
374 | gathered. */ | |
375 | ||
f192ea96 TG |
376 | static int |
377 | oso_el_compare_name (const void *vl, const void *vr) | |
378 | { | |
379 | const oso_el *l = (const oso_el *)vl; | |
380 | const oso_el *r = (const oso_el *)vr; | |
381 | ||
382 | return strcmp (l->name, r->name); | |
383 | } | |
384 | ||
e4c5f296 TG |
385 | /* Hash table entry structure for the stabs symbols in the main object file. |
386 | This is used to speed up lookup for symbols in the OSO. */ | |
38947cca | 387 | |
e4c5f296 TG |
388 | struct macho_sym_hash_entry |
389 | { | |
390 | struct bfd_hash_entry base; | |
391 | const asymbol *sym; | |
392 | }; | |
38947cca | 393 | |
e4c5f296 | 394 | /* Routine to create an entry in the hash table. */ |
38947cca | 395 | |
e4c5f296 TG |
396 | static struct bfd_hash_entry * |
397 | macho_sym_hash_newfunc (struct bfd_hash_entry *entry, | |
398 | struct bfd_hash_table *table, | |
399 | const char *string) | |
38947cca | 400 | { |
e4c5f296 TG |
401 | struct macho_sym_hash_entry *ret = (struct macho_sym_hash_entry *) entry; |
402 | ||
403 | /* Allocate the structure if it has not already been allocated by a | |
404 | subclass. */ | |
405 | if (ret == NULL) | |
406 | ret = (struct macho_sym_hash_entry *) bfd_hash_allocate (table, | |
407 | sizeof (* ret)); | |
408 | if (ret == NULL) | |
409 | return NULL; | |
38947cca | 410 | |
e4c5f296 TG |
411 | /* Call the allocation method of the superclass. */ |
412 | ret = (struct macho_sym_hash_entry *) | |
413 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string); | |
38947cca | 414 | |
e4c5f296 | 415 | if (ret) |
38947cca | 416 | { |
e4c5f296 TG |
417 | /* Initialize the local fields. */ |
418 | ret->sym = NULL; | |
419 | } | |
38947cca | 420 | |
e4c5f296 TG |
421 | return (struct bfd_hash_entry *) ret; |
422 | } | |
38947cca | 423 | |
e4c5f296 TG |
424 | /* Get the value of SYM from the minimal symtab of MAIN_OBJFILE. This is used |
425 | to get the value of global and common symbols. */ | |
38947cca | 426 | |
e4c5f296 TG |
427 | static CORE_ADDR |
428 | macho_resolve_oso_sym_with_minsym (struct objfile *main_objfile, asymbol *sym) | |
429 | { | |
430 | /* For common symbol and global symbols, use the min symtab. */ | |
431 | struct minimal_symbol *msym; | |
432 | const char *name = sym->name; | |
433 | ||
434 | if (name[0] == bfd_get_symbol_leading_char (main_objfile->obfd)) | |
435 | ++name; | |
436 | msym = lookup_minimal_symbol (name, NULL, main_objfile); | |
437 | if (msym == NULL) | |
438 | { | |
439 | warning (_("can't find symbol '%s' in minsymtab"), name); | |
440 | return 0; | |
38947cca | 441 | } |
e4c5f296 TG |
442 | else |
443 | return SYMBOL_VALUE_ADDRESS (msym); | |
38947cca JB |
444 | } |
445 | ||
e4c5f296 | 446 | /* Add oso file OSO/ABFD as a symbol file. */ |
f192ea96 TG |
447 | |
448 | static void | |
bdfed3bc TG |
449 | macho_add_oso_symfile (oso_el *oso, bfd *abfd, |
450 | struct objfile *main_objfile, int symfile_flags) | |
f192ea96 | 451 | { |
e4c5f296 | 452 | int storage; |
f192ea96 | 453 | int i; |
e4c5f296 TG |
454 | asymbol **symbol_table; |
455 | asymbol **symp; | |
456 | struct bfd_hash_table table; | |
457 | int nbr_sections; | |
8ac244b4 | 458 | struct cleanup *cleanup; |
e4c5f296 TG |
459 | |
460 | /* Per section flag to mark which section have been rebased. */ | |
461 | unsigned char *sections_rebased; | |
f192ea96 TG |
462 | |
463 | if (mach_o_debug_level > 0) | |
e4c5f296 TG |
464 | printf_unfiltered |
465 | (_("Loading debugging symbols from oso: %s\n"), oso->name); | |
2d33f7b8 | 466 | |
f192ea96 TG |
467 | if (!bfd_check_format (abfd, bfd_object)) |
468 | { | |
469 | warning (_("`%s': can't read symbols: %s."), oso->name, | |
470 | bfd_errmsg (bfd_get_error ())); | |
cbb099e8 | 471 | gdb_bfd_unref (abfd); |
f192ea96 TG |
472 | return; |
473 | } | |
474 | ||
e4c5f296 TG |
475 | if (abfd->my_archive == NULL && oso->mtime != bfd_get_mtime (abfd)) |
476 | { | |
477 | warning (_("`%s': file time stamp mismatch."), oso->name); | |
cbb099e8 | 478 | gdb_bfd_unref (abfd); |
e4c5f296 TG |
479 | return; |
480 | } | |
481 | ||
482 | if (!bfd_hash_table_init_n (&table, macho_sym_hash_newfunc, | |
483 | sizeof (struct macho_sym_hash_entry), | |
484 | oso->nbr_syms)) | |
485 | { | |
486 | warning (_("`%s': can't create hash table"), oso->name); | |
cbb099e8 | 487 | gdb_bfd_unref (abfd); |
e4c5f296 TG |
488 | return; |
489 | } | |
490 | ||
f192ea96 | 491 | bfd_set_cacheable (abfd, 1); |
f18b4cab | 492 | |
e4c5f296 TG |
493 | /* Read symbols table. */ |
494 | storage = bfd_get_symtab_upper_bound (abfd); | |
495 | symbol_table = (asymbol **) xmalloc (storage); | |
496 | bfd_canonicalize_symtab (abfd, symbol_table); | |
f192ea96 | 497 | |
e4c5f296 TG |
498 | /* Init section flags. */ |
499 | nbr_sections = bfd_count_sections (abfd); | |
500 | sections_rebased = (unsigned char *) alloca (nbr_sections); | |
501 | for (i = 0; i < nbr_sections; i++) | |
502 | sections_rebased[i] = 0; | |
f192ea96 | 503 | |
e4c5f296 TG |
504 | /* Put symbols for the OSO file in the hash table. */ |
505 | for (symp = oso->oso_sym; symp != oso->end_sym; symp++) | |
f192ea96 | 506 | { |
e4c5f296 TG |
507 | const asymbol *sym = *symp; |
508 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
f18b4cab | 509 | |
e4c5f296 | 510 | switch (mach_o_sym->n_type) |
f18b4cab | 511 | { |
e4c5f296 TG |
512 | case N_ENSYM: |
513 | case N_BNSYM: | |
514 | case N_GSYM: | |
515 | sym = NULL; | |
516 | break; | |
517 | case N_FUN: | |
518 | if (sym->name == NULL || sym->name[0] == 0) | |
519 | sym = NULL; | |
520 | break; | |
521 | case N_STSYM: | |
522 | break; | |
523 | default: | |
524 | sym = NULL; | |
525 | break; | |
526 | } | |
527 | if (sym != NULL) | |
528 | { | |
529 | struct macho_sym_hash_entry *ent; | |
530 | ||
531 | ent = (struct macho_sym_hash_entry *) | |
532 | bfd_hash_lookup (&table, sym->name, TRUE, FALSE); | |
533 | if (ent->sym != NULL) | |
534 | complaint (&symfile_complaints, | |
535 | _("Duplicated symbol %s in symbol table"), sym->name); | |
536 | else | |
f18b4cab | 537 | { |
e4c5f296 TG |
538 | if (mach_o_debug_level > 4) |
539 | { | |
540 | struct gdbarch *arch = get_objfile_arch (main_objfile); | |
541 | printf_unfiltered | |
542 | (_("Adding symbol %s (addr: %s)\n"), | |
543 | sym->name, paddress (arch, sym->value)); | |
544 | } | |
545 | ent->sym = sym; | |
f18b4cab | 546 | } |
f18b4cab | 547 | } |
e4c5f296 | 548 | } |
f18b4cab | 549 | |
e4c5f296 TG |
550 | /* Relocate symbols of the OSO. */ |
551 | for (i = 0; symbol_table[i]; i++) | |
552 | { | |
553 | asymbol *sym = symbol_table[i]; | |
554 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
555 | ||
556 | if (mach_o_sym->n_type & BFD_MACH_O_N_STAB) | |
557 | continue; | |
558 | if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF | |
559 | && sym->value != 0) | |
f18b4cab | 560 | { |
e4c5f296 TG |
561 | /* For common symbol use the min symtab and modify the OSO |
562 | symbol table. */ | |
563 | CORE_ADDR res; | |
564 | ||
565 | res = macho_resolve_oso_sym_with_minsym (main_objfile, sym); | |
566 | if (res != 0) | |
567 | { | |
45dfa85a | 568 | sym->section = bfd_com_section_ptr; |
e4c5f296 TG |
569 | sym->value = res; |
570 | } | |
f18b4cab | 571 | } |
e4c5f296 TG |
572 | else if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT) |
573 | { | |
574 | /* Normal symbol. */ | |
575 | asection *sec = sym->section; | |
576 | bfd_mach_o_section *msec; | |
577 | unsigned int sec_type; | |
578 | ||
579 | /* Skip buggy ones. */ | |
580 | if (sec == NULL || sections_rebased[sec->index] != 0) | |
581 | continue; | |
582 | ||
583 | /* Only consider regular, non-debugging sections. */ | |
584 | msec = bfd_mach_o_get_mach_o_section (sec); | |
585 | sec_type = msec->flags & BFD_MACH_O_SECTION_TYPE_MASK; | |
586 | if ((sec_type == BFD_MACH_O_S_REGULAR | |
587 | || sec_type == BFD_MACH_O_S_ZEROFILL) | |
588 | && (msec->flags & BFD_MACH_O_S_ATTR_DEBUG) == 0) | |
589 | { | |
590 | CORE_ADDR addr = 0; | |
591 | ||
592 | if ((mach_o_sym->n_type & BFD_MACH_O_N_EXT) != 0) | |
593 | { | |
594 | /* Use the min symtab for global symbols. */ | |
595 | addr = macho_resolve_oso_sym_with_minsym (main_objfile, sym); | |
596 | } | |
597 | else | |
598 | { | |
599 | struct macho_sym_hash_entry *ent; | |
600 | ||
601 | ent = (struct macho_sym_hash_entry *) | |
602 | bfd_hash_lookup (&table, sym->name, FALSE, FALSE); | |
603 | if (ent != NULL) | |
604 | addr = bfd_asymbol_value (ent->sym); | |
605 | } | |
f18b4cab | 606 | |
e4c5f296 TG |
607 | /* Adjust the section. */ |
608 | if (addr != 0) | |
609 | { | |
610 | CORE_ADDR res = addr - sym->value; | |
611 | ||
612 | if (mach_o_debug_level > 3) | |
613 | { | |
614 | struct gdbarch *arch = get_objfile_arch (main_objfile); | |
615 | printf_unfiltered | |
616 | (_("resolve sect %s with %s (set to %s)\n"), | |
617 | sec->name, sym->name, | |
618 | paddress (arch, res)); | |
619 | } | |
620 | bfd_set_section_vma (abfd, sec, res); | |
621 | sections_rebased[sec->index] = 1; | |
622 | } | |
623 | } | |
624 | else | |
625 | { | |
626 | /* Mark the section as never rebased. */ | |
627 | sections_rebased[sec->index] = 2; | |
628 | } | |
629 | } | |
f192ea96 TG |
630 | } |
631 | ||
e4c5f296 | 632 | bfd_hash_table_free (&table); |
38947cca | 633 | |
bdfed3bc TG |
634 | /* We need to clear SYMFILE_MAINLINE to avoid interractive question |
635 | from symfile.c:symbol_file_add_with_addrs_or_offsets. */ | |
8ac244b4 | 636 | cleanup = make_cleanup_bfd_unref (abfd); |
e4c5f296 | 637 | symbol_file_add_from_bfd |
f18b4cab | 638 | (abfd, symfile_flags & ~(SYMFILE_MAINLINE | SYMFILE_VERBOSE), NULL, |
bdfed3bc | 639 | main_objfile->flags & (OBJF_REORDERED | OBJF_SHARED |
63524580 JK |
640 | | OBJF_READNOW | OBJF_USERLOADED), |
641 | main_objfile); | |
8ac244b4 | 642 | do_cleanups (cleanup); |
f192ea96 TG |
643 | } |
644 | ||
a80b95ba | 645 | /* Read symbols from the vector of oso files. */ |
f192ea96 | 646 | |
a80b95ba | 647 | static void |
2d33f7b8 | 648 | macho_symfile_read_all_oso (struct objfile *main_objfile, int symfile_flags) |
a80b95ba TG |
649 | { |
650 | int ix; | |
651 | VEC (oso_el) *vec; | |
652 | oso_el *oso; | |
a4453b7e | 653 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); |
a80b95ba TG |
654 | |
655 | vec = oso_vector; | |
656 | oso_vector = NULL; | |
e4c5f296 | 657 | |
f192ea96 TG |
658 | /* Sort oso by name so that files from libraries are gathered. */ |
659 | qsort (VEC_address (oso_el, vec), VEC_length (oso_el, vec), | |
660 | sizeof (oso_el), oso_el_compare_name); | |
a80b95ba | 661 | |
f192ea96 | 662 | for (ix = 0; VEC_iterate (oso_el, vec, ix, oso);) |
a80b95ba | 663 | { |
a80b95ba | 664 | int pfx_len; |
e4c5f296 | 665 | |
a80b95ba TG |
666 | /* Check if this is a library name. */ |
667 | pfx_len = get_archive_prefix_len (oso->name); | |
668 | if (pfx_len > 0) | |
669 | { | |
670 | bfd *archive_bfd; | |
671 | bfd *member_bfd; | |
f192ea96 TG |
672 | char *archive_name = XNEWVEC (char, pfx_len + 1); |
673 | int last_ix; | |
674 | oso_el *oso2; | |
675 | int ix2; | |
a80b95ba | 676 | |
a80b95ba TG |
677 | memcpy (archive_name, oso->name, pfx_len); |
678 | archive_name[pfx_len] = '\0'; | |
679 | ||
a4453b7e TT |
680 | make_cleanup (xfree, archive_name); |
681 | ||
f192ea96 TG |
682 | /* Compute number of oso for this archive. */ |
683 | for (last_ix = ix; | |
684 | VEC_iterate (oso_el, vec, last_ix, oso2); last_ix++) | |
685 | { | |
686 | if (strncmp (oso2->name, archive_name, pfx_len) != 0) | |
687 | break; | |
688 | } | |
e4c5f296 | 689 | |
a80b95ba | 690 | /* Open the archive and check the format. */ |
64c31149 | 691 | archive_bfd = gdb_bfd_openr (archive_name, gnutarget); |
a80b95ba TG |
692 | if (archive_bfd == NULL) |
693 | { | |
694 | warning (_("Could not open OSO archive file \"%s\""), | |
695 | archive_name); | |
f192ea96 | 696 | ix = last_ix; |
a80b95ba TG |
697 | continue; |
698 | } | |
699 | if (!bfd_check_format (archive_bfd, bfd_archive)) | |
700 | { | |
701 | warning (_("OSO archive file \"%s\" not an archive."), | |
702 | archive_name); | |
cbb099e8 | 703 | gdb_bfd_unref (archive_bfd); |
f192ea96 | 704 | ix = last_ix; |
a80b95ba TG |
705 | continue; |
706 | } | |
a4453b7e | 707 | |
64c31149 | 708 | member_bfd = gdb_bfd_openr_next_archived_file (archive_bfd, NULL); |
e4c5f296 | 709 | |
a80b95ba TG |
710 | if (member_bfd == NULL) |
711 | { | |
712 | warning (_("Could not read archive members out of " | |
713 | "OSO archive \"%s\""), archive_name); | |
cbb099e8 | 714 | gdb_bfd_unref (archive_bfd); |
f192ea96 | 715 | ix = last_ix; |
a80b95ba TG |
716 | continue; |
717 | } | |
f192ea96 TG |
718 | |
719 | /* Load all oso in this library. */ | |
a80b95ba TG |
720 | while (member_bfd != NULL) |
721 | { | |
f192ea96 | 722 | bfd *prev; |
a80b95ba | 723 | const char *member_name = member_bfd->filename; |
f192ea96 TG |
724 | int member_len = strlen (member_name); |
725 | ||
ab7e10a0 | 726 | /* If this member is referenced, add it as a symfile. */ |
f192ea96 TG |
727 | for (ix2 = ix; ix2 < last_ix; ix2++) |
728 | { | |
729 | oso2 = VEC_index (oso_el, vec, ix2); | |
730 | ||
731 | if (oso2->name | |
732 | && strlen (oso2->name) == pfx_len + member_len + 2 | |
733 | && !memcmp (member_name, oso2->name + pfx_len + 1, | |
734 | member_len)) | |
735 | { | |
bdfed3bc TG |
736 | macho_add_oso_symfile (oso2, member_bfd, |
737 | main_objfile, symfile_flags); | |
f192ea96 TG |
738 | oso2->name = NULL; |
739 | break; | |
740 | } | |
741 | } | |
742 | ||
743 | prev = member_bfd; | |
64c31149 TT |
744 | member_bfd = gdb_bfd_openr_next_archived_file (archive_bfd, |
745 | member_bfd); | |
ab7e10a0 TG |
746 | |
747 | /* Free previous member if not referenced by an oso. */ | |
748 | if (ix2 >= last_ix) | |
cbb099e8 | 749 | gdb_bfd_unref (prev); |
a80b95ba | 750 | } |
f192ea96 TG |
751 | for (ix2 = ix; ix2 < last_ix; ix2++) |
752 | { | |
753 | oso_el *oso2 = VEC_index (oso_el, vec, ix2); | |
754 | ||
755 | if (oso2->name != NULL) | |
756 | warning (_("Could not find specified archive member " | |
757 | "for OSO name \"%s\""), oso->name); | |
758 | } | |
759 | ix = last_ix; | |
a80b95ba TG |
760 | } |
761 | else | |
762 | { | |
f192ea96 | 763 | bfd *abfd; |
a80b95ba | 764 | |
64c31149 | 765 | abfd = gdb_bfd_openr (oso->name, gnutarget); |
a80b95ba | 766 | if (!abfd) |
f192ea96 TG |
767 | warning (_("`%s': can't open to read symbols: %s."), oso->name, |
768 | bfd_errmsg (bfd_get_error ())); | |
769 | else | |
bdfed3bc | 770 | macho_add_oso_symfile (oso, abfd, main_objfile, symfile_flags); |
f192ea96 TG |
771 | |
772 | ix++; | |
773 | } | |
774 | } | |
775 | ||
a80b95ba | 776 | VEC_free (oso_el, vec); |
a4453b7e | 777 | do_cleanups (cleanup); |
a80b95ba TG |
778 | } |
779 | ||
780 | /* DSYM (debug symbols) files contain the debug info of an executable. | |
781 | This is a separate file created by dsymutil(1) and is similar to debug | |
782 | link feature on ELF. | |
783 | DSYM files are located in a subdirectory. Append DSYM_SUFFIX to the | |
784 | executable name and the executable base name to get the DSYM file name. */ | |
785 | #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/" | |
786 | ||
787 | /* Check if a dsym file exists for OBJFILE. If so, returns a bfd for it. | |
788 | Return NULL if no valid dsym file is found. */ | |
f192ea96 | 789 | |
a80b95ba TG |
790 | static bfd * |
791 | macho_check_dsym (struct objfile *objfile) | |
792 | { | |
793 | size_t name_len = strlen (objfile->name); | |
794 | size_t dsym_len = strlen (DSYM_SUFFIX); | |
795 | const char *base_name = lbasename (objfile->name); | |
796 | size_t base_len = strlen (base_name); | |
797 | char *dsym_filename = alloca (name_len + dsym_len + base_len + 1); | |
798 | bfd *dsym_bfd; | |
65ccb109 TG |
799 | bfd_mach_o_load_command *main_uuid; |
800 | bfd_mach_o_load_command *dsym_uuid; | |
a80b95ba TG |
801 | |
802 | strcpy (dsym_filename, objfile->name); | |
803 | strcpy (dsym_filename + name_len, DSYM_SUFFIX); | |
804 | strcpy (dsym_filename + name_len + dsym_len, base_name); | |
805 | ||
806 | if (access (dsym_filename, R_OK) != 0) | |
807 | return NULL; | |
808 | ||
65ccb109 TG |
809 | if (bfd_mach_o_lookup_command (objfile->obfd, |
810 | BFD_MACH_O_LC_UUID, &main_uuid) == 0) | |
a80b95ba TG |
811 | { |
812 | warning (_("can't find UUID in %s"), objfile->name); | |
813 | return NULL; | |
814 | } | |
64c31149 | 815 | dsym_bfd = gdb_bfd_openr (dsym_filename, gnutarget); |
a80b95ba TG |
816 | if (dsym_bfd == NULL) |
817 | { | |
818 | warning (_("can't open dsym file %s"), dsym_filename); | |
a80b95ba TG |
819 | return NULL; |
820 | } | |
821 | ||
822 | if (!bfd_check_format (dsym_bfd, bfd_object)) | |
823 | { | |
cbb099e8 | 824 | gdb_bfd_unref (dsym_bfd); |
a80b95ba | 825 | warning (_("bad dsym file format: %s"), bfd_errmsg (bfd_get_error ())); |
a80b95ba TG |
826 | return NULL; |
827 | } | |
828 | ||
65ccb109 TG |
829 | if (bfd_mach_o_lookup_command (dsym_bfd, |
830 | BFD_MACH_O_LC_UUID, &dsym_uuid) == 0) | |
a80b95ba TG |
831 | { |
832 | warning (_("can't find UUID in %s"), dsym_filename); | |
cbb099e8 | 833 | gdb_bfd_unref (dsym_bfd); |
a80b95ba TG |
834 | return NULL; |
835 | } | |
65ccb109 TG |
836 | if (memcmp (dsym_uuid->command.uuid.uuid, main_uuid->command.uuid.uuid, |
837 | sizeof (main_uuid->command.uuid.uuid))) | |
a80b95ba TG |
838 | { |
839 | warning (_("dsym file UUID doesn't match the one in %s"), objfile->name); | |
cbb099e8 | 840 | gdb_bfd_unref (dsym_bfd); |
a80b95ba TG |
841 | return NULL; |
842 | } | |
843 | return dsym_bfd; | |
a80b95ba TG |
844 | } |
845 | ||
846 | static void | |
f4352531 | 847 | macho_symfile_read (struct objfile *objfile, int symfile_flags) |
a80b95ba TG |
848 | { |
849 | bfd *abfd = objfile->obfd; | |
a80b95ba TG |
850 | CORE_ADDR offset; |
851 | long storage_needed; | |
852 | bfd *dsym_bfd; | |
853 | ||
a80b95ba TG |
854 | /* Get symbols from the symbol table only if the file is an executable. |
855 | The symbol table of object files is not relocated and is expected to | |
856 | be in the executable. */ | |
cf1061c0 | 857 | if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) |
a80b95ba TG |
858 | { |
859 | /* Process the normal symbol table first. */ | |
860 | storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); | |
861 | if (storage_needed < 0) | |
862 | error (_("Can't read symbols from %s: %s"), | |
863 | bfd_get_filename (objfile->obfd), | |
864 | bfd_errmsg (bfd_get_error ())); | |
865 | ||
866 | if (storage_needed > 0) | |
867 | { | |
868 | asymbol **symbol_table; | |
869 | long symcount; | |
e4c5f296 | 870 | struct cleanup *back_to; |
a80b95ba TG |
871 | |
872 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
873 | make_cleanup (xfree, symbol_table); | |
e4c5f296 TG |
874 | |
875 | init_minimal_symbol_collection (); | |
876 | back_to = make_cleanup_discard_minimal_symbols (); | |
877 | ||
a80b95ba | 878 | symcount = bfd_canonicalize_symtab (objfile->obfd, symbol_table); |
e4c5f296 | 879 | |
a80b95ba TG |
880 | if (symcount < 0) |
881 | error (_("Can't read symbols from %s: %s"), | |
882 | bfd_get_filename (objfile->obfd), | |
883 | bfd_errmsg (bfd_get_error ())); | |
e4c5f296 | 884 | |
a80b95ba | 885 | macho_symtab_read (objfile, symcount, symbol_table); |
e4c5f296 TG |
886 | |
887 | install_minimal_symbols (objfile); | |
888 | do_cleanups (back_to); | |
a80b95ba | 889 | } |
a80b95ba | 890 | |
cf1061c0 TG |
891 | /* Try to read .eh_frame / .debug_frame. */ |
892 | /* First, locate these sections. We ignore the result status | |
893 | as it only checks for debug info. */ | |
251d32d9 | 894 | dwarf2_has_info (objfile, NULL); |
cf1061c0 | 895 | dwarf2_build_frame_info (objfile); |
e4c5f296 | 896 | |
a80b95ba TG |
897 | /* Check for DSYM file. */ |
898 | dsym_bfd = macho_check_dsym (objfile); | |
899 | if (dsym_bfd != NULL) | |
900 | { | |
901 | int ix; | |
902 | oso_el *oso; | |
6414f3fd | 903 | struct bfd_section *asect, *dsect; |
8ac244b4 | 904 | struct cleanup *cleanup; |
a80b95ba TG |
905 | |
906 | if (mach_o_debug_level > 0) | |
907 | printf_unfiltered (_("dsym file found\n")); | |
908 | ||
909 | /* Remove oso. They won't be used. */ | |
a80b95ba TG |
910 | VEC_free (oso_el, oso_vector); |
911 | oso_vector = NULL; | |
912 | ||
6414f3fd TG |
913 | /* Set dsym section size. */ |
914 | for (asect = objfile->obfd->sections, dsect = dsym_bfd->sections; | |
915 | asect && dsect; | |
916 | asect = asect->next, dsect = dsect->next) | |
917 | { | |
918 | if (strcmp (asect->name, dsect->name) != 0) | |
919 | break; | |
920 | bfd_set_section_size (dsym_bfd, dsect, | |
921 | bfd_get_section_size (asect)); | |
922 | } | |
923 | ||
2480cfa0 | 924 | /* Add the dsym file as a separate file. */ |
8ac244b4 | 925 | cleanup = make_cleanup_bfd_unref (dsym_bfd); |
2480cfa0 | 926 | symbol_file_add_separate (dsym_bfd, symfile_flags, objfile); |
8ac244b4 | 927 | do_cleanups (cleanup); |
e4c5f296 | 928 | |
cf1061c0 | 929 | /* Don't try to read dwarf2 from main file or shared libraries. */ |
2480cfa0 | 930 | return; |
a80b95ba TG |
931 | } |
932 | } | |
933 | ||
251d32d9 | 934 | if (dwarf2_has_info (objfile, NULL)) |
a80b95ba TG |
935 | { |
936 | /* DWARF 2 sections */ | |
f29dff0a | 937 | dwarf2_build_psymtabs (objfile); |
a80b95ba TG |
938 | } |
939 | ||
a80b95ba TG |
940 | /* Then the oso. */ |
941 | if (oso_vector != NULL) | |
2d33f7b8 | 942 | macho_symfile_read_all_oso (objfile, symfile_flags); |
a80b95ba TG |
943 | } |
944 | ||
f18b4cab TG |
945 | static bfd_byte * |
946 | macho_symfile_relocate (struct objfile *objfile, asection *sectp, | |
947 | bfd_byte *buf) | |
948 | { | |
949 | bfd *abfd = objfile->obfd; | |
950 | ||
951 | /* We're only interested in sections with relocation | |
952 | information. */ | |
953 | if ((sectp->flags & SEC_RELOC) == 0) | |
954 | return NULL; | |
955 | ||
956 | if (mach_o_debug_level > 0) | |
957 | printf_unfiltered (_("Relocate section '%s' of %s\n"), | |
958 | sectp->name, objfile->name); | |
959 | ||
f18b4cab TG |
960 | return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); |
961 | } | |
962 | ||
a80b95ba TG |
963 | static void |
964 | macho_symfile_finish (struct objfile *objfile) | |
965 | { | |
966 | } | |
967 | ||
968 | static void | |
969 | macho_symfile_offsets (struct objfile *objfile, | |
970 | struct section_addr_info *addrs) | |
971 | { | |
972 | unsigned int i; | |
973 | unsigned int num_sections; | |
974 | struct obj_section *osect; | |
975 | ||
976 | /* Allocate section_offsets. */ | |
977 | objfile->num_sections = bfd_count_sections (objfile->obfd); | |
978 | objfile->section_offsets = (struct section_offsets *) | |
979 | obstack_alloc (&objfile->objfile_obstack, | |
980 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
981 | memset (objfile->section_offsets, 0, | |
982 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
983 | ||
984 | /* This code is run when we first add the objfile with | |
985 | symfile_add_with_addrs_or_offsets, when "addrs" not "offsets" are | |
986 | passed in. The place in symfile.c where the addrs are applied | |
987 | depends on the addrs having section names. But in the dyld code | |
988 | we build an anonymous array of addrs, so that code is a no-op. | |
989 | Because of that, we have to apply the addrs to the sections here. | |
990 | N.B. if an objfile slides after we've already created it, then it | |
991 | goes through objfile_relocate. */ | |
992 | ||
993 | for (i = 0; i < addrs->num_sections; i++) | |
994 | { | |
995 | if (addrs->other[i].name == NULL) | |
996 | continue; | |
997 | ||
998 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
999 | { | |
1000 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
1001 | ||
1002 | if (strcmp (bfd_sect_name, addrs->other[i].name) == 0) | |
1003 | { | |
1004 | obj_section_offset (osect) = addrs->other[i].addr; | |
1005 | break; | |
1006 | } | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | objfile->sect_index_text = 0; | |
1011 | ||
1012 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
1013 | { | |
1014 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
1015 | int sect_index = osect->the_bfd_section->index; | |
e4c5f296 | 1016 | |
cf1061c0 TG |
1017 | if (strncmp (bfd_sect_name, "LC_SEGMENT.", 11) == 0) |
1018 | bfd_sect_name += 11; | |
1019 | if (strcmp (bfd_sect_name, "__TEXT") == 0 | |
1020 | || strcmp (bfd_sect_name, "__TEXT.__text") == 0) | |
a80b95ba TG |
1021 | objfile->sect_index_text = sect_index; |
1022 | } | |
1023 | } | |
1024 | ||
00b5771c | 1025 | static const struct sym_fns macho_sym_fns = { |
a80b95ba TG |
1026 | bfd_target_mach_o_flavour, |
1027 | ||
3e43a32a MS |
1028 | macho_new_init, /* init anything gbl to entire symtab */ |
1029 | macho_symfile_init, /* read initial info, setup for sym_read() */ | |
1030 | macho_symfile_read, /* read a symbol file into symtab */ | |
b11896a5 | 1031 | NULL, /* sym_read_psymbols */ |
3e43a32a MS |
1032 | macho_symfile_finish, /* finished with file, cleanup */ |
1033 | macho_symfile_offsets, /* xlate external to internal form */ | |
1034 | default_symfile_segments, /* Get segment information from a file. */ | |
1035 | NULL, | |
1036 | macho_symfile_relocate, /* Relocate a debug section. */ | |
55aa24fb | 1037 | NULL, /* sym_get_probes */ |
00b5771c | 1038 | &psym_functions |
a80b95ba TG |
1039 | }; |
1040 | ||
c381a3f6 JB |
1041 | /* -Wmissing-prototypes */ |
1042 | extern initialize_file_ftype _initialize_machoread; | |
1043 | ||
a80b95ba TG |
1044 | void |
1045 | _initialize_machoread () | |
1046 | { | |
1047 | add_symtab_fns (&macho_sym_fns); | |
1048 | ||
1049 | add_setshow_zinteger_cmd ("mach-o", class_obscure, | |
3e43a32a MS |
1050 | &mach_o_debug_level, |
1051 | _("Set if printing Mach-O symbols processing."), | |
1052 | _("Show if printing Mach-O symbols processing."), | |
1053 | NULL, NULL, NULL, | |
a80b95ba TG |
1054 | &setdebuglist, &showdebuglist); |
1055 | } |