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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
0fb0cc75 | 2 | Copyright (C) 2008, 2009 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" | |
35 | ||
36 | #include <string.h> | |
37 | ||
38 | /* If non-zero displays debugging message. */ | |
39 | static int mach_o_debug_level = 0; | |
40 | ||
41 | static void | |
42 | macho_new_init (struct objfile *objfile) | |
43 | { | |
44 | } | |
45 | ||
46 | static void | |
47 | macho_symfile_init (struct objfile *objfile) | |
48 | { | |
49 | objfile->flags |= OBJF_REORDERED; | |
50 | init_entry_point_info (objfile); | |
51 | } | |
52 | ||
53 | /* Dwarf debugging information are never in the final executable. They stay | |
54 | in object files and the executable contains the list of object files read | |
55 | during the link. | |
56 | Each time an oso (other source) is found in the executable, the reader | |
57 | creates such a structure. They are read after the processing of the | |
58 | executable. | |
59 | */ | |
60 | typedef struct oso_el | |
61 | { | |
62 | /* Object file name. */ | |
63 | const char *name; | |
64 | ||
65 | /* Associated time stamp. */ | |
66 | unsigned long mtime; | |
67 | ||
68 | /* Number of sections. This is the length of SYMBOLS and OFFSETS array. */ | |
69 | int num_sections; | |
70 | ||
71 | /* Each seaction of the object file is represented by a symbol and its | |
3188d986 TG |
72 | offset. If the offset is 0, we assume that the symbol is at offset 0 |
73 | in the OSO object file and a symbol lookup in the main file is | |
74 | required to get the offset. */ | |
a80b95ba TG |
75 | asymbol **symbols; |
76 | bfd_vma *offsets; | |
77 | } | |
78 | oso_el; | |
79 | ||
80 | /* Vector of object files to be read after the executable. */ | |
81 | DEF_VEC_O (oso_el); | |
82 | static VEC (oso_el) *oso_vector; | |
83 | ||
84 | /* Add a new OSO to the vector. */ | |
f192ea96 | 85 | |
a80b95ba TG |
86 | static void |
87 | macho_add_oso (const asymbol *oso_sym, int nbr_sections, | |
88 | asymbol **symbols, bfd_vma *offsets) | |
89 | { | |
90 | oso_el el; | |
91 | ||
92 | el.name = oso_sym->name; | |
93 | el.mtime = oso_sym->value; | |
94 | el.num_sections = nbr_sections; | |
95 | el.symbols = symbols; | |
96 | el.offsets = offsets; | |
97 | VEC_safe_push (oso_el, oso_vector, &el); | |
98 | } | |
99 | ||
100 | /* Build the minimal symbol table from SYMBOL_TABLE of length | |
101 | NUMBER_OF_SYMBOLS for OBJFILE. | |
102 | Read OSO files at the end. */ | |
f192ea96 | 103 | |
a80b95ba TG |
104 | static void |
105 | macho_symtab_read (struct objfile *objfile, | |
106 | long number_of_symbols, asymbol **symbol_table) | |
107 | { | |
108 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
109 | long storage_needed; | |
a80b95ba TG |
110 | long i, j; |
111 | CORE_ADDR offset; | |
112 | enum minimal_symbol_type ms_type; | |
113 | unsigned int nbr_sections = bfd_count_sections (objfile->obfd); | |
114 | asymbol **first_symbol = NULL; | |
115 | bfd_vma *first_offset = NULL; | |
116 | const asymbol *oso_file = NULL; | |
117 | ||
118 | for (i = 0; i < number_of_symbols; i++) | |
119 | { | |
bb00b29d TG |
120 | asymbol *sym = symbol_table[i]; |
121 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
122 | ||
a80b95ba TG |
123 | offset = ANOFFSET (objfile->section_offsets, sym->section->index); |
124 | ||
125 | if (sym->flags & BSF_DEBUGGING) | |
126 | { | |
a80b95ba TG |
127 | bfd_vma addr; |
128 | ||
3188d986 TG |
129 | /* Debugging symbols are used to collect OSO file names as well |
130 | as section offsets. */ | |
131 | ||
bb00b29d | 132 | switch (mach_o_sym->n_type) |
a80b95ba TG |
133 | { |
134 | case N_SO: | |
3188d986 TG |
135 | /* An empty SO entry terminates a chunk for an OSO file. */ |
136 | if ((sym->name == NULL || sym->name[0] == 0) && oso_file != NULL) | |
a80b95ba TG |
137 | { |
138 | macho_add_oso (oso_file, nbr_sections, | |
3188d986 | 139 | first_symbol, first_offset); |
a80b95ba TG |
140 | first_symbol = NULL; |
141 | first_offset = NULL; | |
142 | oso_file = NULL; | |
143 | } | |
144 | break; | |
145 | case N_FUN: | |
146 | case N_STSYM: | |
147 | if (sym->name == NULL || sym->name[0] == '\0') | |
148 | break; | |
149 | /* Fall through. */ | |
150 | case N_BNSYM: | |
151 | gdb_assert (oso_file != NULL); | |
152 | addr = sym->value | |
153 | + bfd_get_section_vma (sym->section->bfd, sym->section); | |
154 | if (addr != 0 | |
155 | && first_symbol[sym->section->index] == NULL) | |
156 | { | |
3188d986 | 157 | /* These STAB entries can directly relocate a section. */ |
a80b95ba TG |
158 | first_symbol[sym->section->index] = sym; |
159 | first_offset[sym->section->index] = addr + offset; | |
160 | } | |
161 | break; | |
162 | case N_GSYM: | |
163 | gdb_assert (oso_file != NULL); | |
164 | if (first_symbol[sym->section->index] == NULL) | |
3188d986 TG |
165 | { |
166 | /* This STAB entry needs a symbol look-up to relocate | |
167 | the section. */ | |
168 | first_symbol[sym->section->index] = sym; | |
169 | first_offset[sym->section->index] = 0; | |
170 | } | |
a80b95ba TG |
171 | break; |
172 | case N_OSO: | |
3188d986 | 173 | /* New OSO file. */ |
a80b95ba TG |
174 | gdb_assert (oso_file == NULL); |
175 | first_symbol = (asymbol **)xmalloc (nbr_sections | |
176 | * sizeof (asymbol *)); | |
177 | first_offset = (bfd_vma *)xmalloc (nbr_sections | |
178 | * sizeof (bfd_vma)); | |
179 | for (j = 0; j < nbr_sections; j++) | |
180 | first_symbol[j] = NULL; | |
181 | oso_file = sym; | |
182 | break; | |
183 | } | |
184 | continue; | |
185 | } | |
186 | ||
187 | if (sym->name == NULL || *sym->name == '\0') | |
188 | { | |
189 | /* Skip names that don't exist (shouldn't happen), or names | |
190 | that are null strings (may happen). */ | |
191 | continue; | |
192 | } | |
193 | ||
194 | if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) | |
195 | { | |
196 | struct minimal_symbol *msym; | |
197 | CORE_ADDR symaddr; | |
198 | ||
199 | /* Bfd symbols are section relative. */ | |
200 | symaddr = sym->value + sym->section->vma; | |
201 | ||
202 | /* Select global/local/weak symbols. Note that bfd puts abs | |
203 | symbols in their own section, so all symbols we are | |
204 | interested in will have a section. */ | |
205 | /* Relocate all non-absolute and non-TLS symbols by the | |
206 | section offset. */ | |
207 | if (sym->section != &bfd_abs_section | |
208 | && !(sym->section->flags & SEC_THREAD_LOCAL)) | |
209 | symaddr += offset; | |
210 | ||
211 | if (sym->section == &bfd_abs_section) | |
212 | ms_type = mst_abs; | |
213 | else if (sym->section->flags & SEC_CODE) | |
214 | { | |
215 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
216 | ms_type = mst_text; | |
217 | else | |
218 | ms_type = mst_file_text; | |
219 | } | |
220 | else if (sym->section->flags & SEC_ALLOC) | |
221 | { | |
222 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
223 | { | |
224 | if (sym->section->flags & SEC_LOAD) | |
225 | ms_type = mst_data; | |
226 | else | |
227 | ms_type = mst_bss; | |
228 | } | |
229 | else if (sym->flags & BSF_LOCAL) | |
230 | { | |
231 | /* Not a special stabs-in-elf symbol, do regular | |
232 | symbol processing. */ | |
233 | if (sym->section->flags & SEC_LOAD) | |
234 | ms_type = mst_file_data; | |
235 | else | |
236 | ms_type = mst_file_bss; | |
237 | } | |
238 | else | |
239 | ms_type = mst_unknown; | |
240 | } | |
241 | else | |
242 | continue; /* Skip this symbol. */ | |
243 | ||
244 | gdb_assert (sym->section->index < nbr_sections); | |
245 | if (oso_file != NULL | |
246 | && first_symbol[sym->section->index] == NULL) | |
247 | { | |
3188d986 | 248 | /* Standard symbols can directly relocate sections. */ |
a80b95ba TG |
249 | first_symbol[sym->section->index] = sym; |
250 | first_offset[sym->section->index] = symaddr; | |
251 | } | |
252 | ||
253 | msym = prim_record_minimal_symbol_and_info | |
254 | (sym->name, symaddr, ms_type, sym->section->index, | |
255 | sym->section, objfile); | |
256 | } | |
257 | } | |
258 | ||
3188d986 | 259 | /* Just in case there is no trailing SO entry. */ |
a80b95ba TG |
260 | if (oso_file != NULL) |
261 | macho_add_oso (oso_file, nbr_sections, first_symbol, first_offset); | |
262 | } | |
263 | ||
264 | /* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'), | |
265 | returns the length of the archive name. | |
266 | Returns -1 otherwise. */ | |
f192ea96 | 267 | |
a80b95ba TG |
268 | static int |
269 | get_archive_prefix_len (const char *name) | |
270 | { | |
271 | char *lparen; | |
272 | int name_len = strlen (name); | |
273 | ||
274 | if (name_len == 0 || name[name_len - 1] != ')') | |
275 | return -1; | |
276 | ||
277 | lparen = strrchr (name, '('); | |
278 | if (lparen == NULL || lparen == name) | |
279 | return -1; | |
280 | return lparen - name; | |
281 | } | |
282 | ||
f192ea96 TG |
283 | static int |
284 | oso_el_compare_name (const void *vl, const void *vr) | |
285 | { | |
286 | const oso_el *l = (const oso_el *)vl; | |
287 | const oso_el *r = (const oso_el *)vr; | |
288 | ||
289 | return strcmp (l->name, r->name); | |
290 | } | |
291 | ||
292 | /* Add an oso file as a symbol file. */ | |
293 | ||
294 | static void | |
295 | macho_add_oso_symfile (oso_el *oso, bfd *abfd, struct objfile *main_objfile) | |
296 | { | |
297 | struct section_addr_info *addrs; | |
298 | int len; | |
299 | int i; | |
300 | char leading_char; | |
301 | ||
302 | if (mach_o_debug_level > 0) | |
303 | printf_unfiltered (_("Loading symbols from oso: %s\n"), oso->name); | |
304 | ||
305 | if (!bfd_check_format (abfd, bfd_object)) | |
306 | { | |
307 | warning (_("`%s': can't read symbols: %s."), oso->name, | |
308 | bfd_errmsg (bfd_get_error ())); | |
309 | bfd_close (abfd); | |
310 | return; | |
311 | } | |
312 | ||
313 | bfd_set_cacheable (abfd, 1); | |
314 | ||
315 | /* Compute addr length. */ | |
316 | len = 0; | |
317 | for (i = 0; i < oso->num_sections; i++) | |
318 | if (oso->symbols[i] != NULL) | |
319 | len++; | |
320 | ||
321 | addrs = alloc_section_addr_info (len); | |
322 | ||
323 | leading_char = bfd_get_symbol_leading_char (main_objfile->obfd); | |
324 | ||
325 | len = 0; | |
326 | for (i = 0; i < oso->num_sections; i++) | |
327 | if (oso->symbols[i] != NULL) | |
328 | { | |
329 | if (oso->offsets[i]) | |
330 | addrs->other[len].addr = oso->offsets[i]; | |
331 | else | |
332 | { | |
333 | struct minimal_symbol *msym; | |
334 | const char *name = oso->symbols[i]->name; | |
335 | ||
336 | if (name[0] == leading_char) | |
337 | ++name; | |
338 | ||
339 | if (mach_o_debug_level > 3) | |
340 | printf_unfiltered (_("resolve sect %s with %s\n"), | |
341 | oso->symbols[i]->section->name, | |
342 | oso->symbols[i]->name); | |
343 | msym = lookup_minimal_symbol (name, NULL, main_objfile); | |
344 | if (msym == NULL) | |
345 | { | |
346 | warning (_("can't find symbol '%s' in minsymtab"), | |
347 | oso->symbols[i]->name); | |
348 | addrs->other[len].addr = 0; | |
349 | } | |
350 | else | |
351 | addrs->other[len].addr = SYMBOL_VALUE_ADDRESS (msym); | |
352 | } | |
353 | addrs->other[len].name = (char *)oso->symbols[i]->section->name; | |
354 | len++; | |
355 | } | |
356 | ||
357 | if (mach_o_debug_level > 1) | |
358 | { | |
359 | int j; | |
360 | for (j = 0; j < addrs->num_sections; j++) | |
361 | printf_unfiltered (_(" %s: %s\n"), | |
362 | core_addr_to_string (addrs->other[j].addr), | |
363 | addrs->other[j].name); | |
364 | } | |
365 | ||
366 | symbol_file_add_from_bfd (abfd, 0, addrs, 0); | |
367 | } | |
368 | ||
a80b95ba | 369 | /* Read symbols from the vector of oso files. */ |
f192ea96 | 370 | |
a80b95ba TG |
371 | static void |
372 | macho_oso_symfile (struct objfile *main_objfile) | |
373 | { | |
374 | int ix; | |
375 | VEC (oso_el) *vec; | |
376 | oso_el *oso; | |
a80b95ba TG |
377 | |
378 | vec = oso_vector; | |
379 | oso_vector = NULL; | |
380 | ||
f192ea96 TG |
381 | /* Sort oso by name so that files from libraries are gathered. */ |
382 | qsort (VEC_address (oso_el, vec), VEC_length (oso_el, vec), | |
383 | sizeof (oso_el), oso_el_compare_name); | |
a80b95ba | 384 | |
f192ea96 | 385 | for (ix = 0; VEC_iterate (oso_el, vec, ix, oso);) |
a80b95ba | 386 | { |
a80b95ba | 387 | int pfx_len; |
a80b95ba TG |
388 | |
389 | /* Check if this is a library name. */ | |
390 | pfx_len = get_archive_prefix_len (oso->name); | |
391 | if (pfx_len > 0) | |
392 | { | |
393 | bfd *archive_bfd; | |
394 | bfd *member_bfd; | |
f192ea96 TG |
395 | char *archive_name = XNEWVEC (char, pfx_len + 1); |
396 | int last_ix; | |
397 | oso_el *oso2; | |
398 | int ix2; | |
a80b95ba | 399 | |
a80b95ba TG |
400 | memcpy (archive_name, oso->name, pfx_len); |
401 | archive_name[pfx_len] = '\0'; | |
402 | ||
f192ea96 TG |
403 | /* Compute number of oso for this archive. */ |
404 | for (last_ix = ix; | |
405 | VEC_iterate (oso_el, vec, last_ix, oso2); last_ix++) | |
406 | { | |
407 | if (strncmp (oso2->name, archive_name, pfx_len) != 0) | |
408 | break; | |
409 | } | |
410 | ||
a80b95ba TG |
411 | /* Open the archive and check the format. */ |
412 | archive_bfd = bfd_openr (archive_name, gnutarget); | |
413 | if (archive_bfd == NULL) | |
414 | { | |
415 | warning (_("Could not open OSO archive file \"%s\""), | |
416 | archive_name); | |
f192ea96 | 417 | ix = last_ix; |
a80b95ba TG |
418 | continue; |
419 | } | |
420 | if (!bfd_check_format (archive_bfd, bfd_archive)) | |
421 | { | |
422 | warning (_("OSO archive file \"%s\" not an archive."), | |
423 | archive_name); | |
424 | bfd_close (archive_bfd); | |
f192ea96 | 425 | ix = last_ix; |
a80b95ba TG |
426 | continue; |
427 | } | |
428 | member_bfd = bfd_openr_next_archived_file (archive_bfd, NULL); | |
429 | ||
430 | if (member_bfd == NULL) | |
431 | { | |
432 | warning (_("Could not read archive members out of " | |
433 | "OSO archive \"%s\""), archive_name); | |
434 | bfd_close (archive_bfd); | |
f192ea96 | 435 | ix = last_ix; |
a80b95ba TG |
436 | continue; |
437 | } | |
f192ea96 TG |
438 | |
439 | /* Load all oso in this library. */ | |
a80b95ba TG |
440 | while (member_bfd != NULL) |
441 | { | |
f192ea96 | 442 | bfd *prev; |
a80b95ba | 443 | const char *member_name = member_bfd->filename; |
f192ea96 TG |
444 | int member_len = strlen (member_name); |
445 | ||
ab7e10a0 | 446 | /* If this member is referenced, add it as a symfile. */ |
f192ea96 TG |
447 | for (ix2 = ix; ix2 < last_ix; ix2++) |
448 | { | |
449 | oso2 = VEC_index (oso_el, vec, ix2); | |
450 | ||
451 | if (oso2->name | |
452 | && strlen (oso2->name) == pfx_len + member_len + 2 | |
453 | && !memcmp (member_name, oso2->name + pfx_len + 1, | |
454 | member_len)) | |
455 | { | |
456 | macho_add_oso_symfile (oso2, member_bfd, main_objfile); | |
457 | oso2->name = NULL; | |
458 | break; | |
459 | } | |
460 | } | |
461 | ||
462 | prev = member_bfd; | |
a80b95ba TG |
463 | member_bfd = bfd_openr_next_archived_file |
464 | (archive_bfd, member_bfd); | |
ab7e10a0 TG |
465 | |
466 | /* Free previous member if not referenced by an oso. */ | |
467 | if (ix2 >= last_ix) | |
f192ea96 | 468 | bfd_close (prev); |
a80b95ba | 469 | } |
f192ea96 TG |
470 | for (ix2 = ix; ix2 < last_ix; ix2++) |
471 | { | |
472 | oso_el *oso2 = VEC_index (oso_el, vec, ix2); | |
473 | ||
474 | if (oso2->name != NULL) | |
475 | warning (_("Could not find specified archive member " | |
476 | "for OSO name \"%s\""), oso->name); | |
477 | } | |
478 | ix = last_ix; | |
a80b95ba TG |
479 | } |
480 | else | |
481 | { | |
f192ea96 | 482 | bfd *abfd; |
a80b95ba TG |
483 | |
484 | abfd = bfd_openr (oso->name, gnutarget); | |
485 | if (!abfd) | |
f192ea96 TG |
486 | warning (_("`%s': can't open to read symbols: %s."), oso->name, |
487 | bfd_errmsg (bfd_get_error ())); | |
488 | else | |
489 | macho_add_oso_symfile (oso, abfd, main_objfile); | |
490 | ||
491 | ix++; | |
492 | } | |
493 | } | |
494 | ||
495 | for (ix = 0; VEC_iterate (oso_el, vec, ix, oso); ix++) | |
496 | { | |
a80b95ba TG |
497 | xfree (oso->symbols); |
498 | xfree (oso->offsets); | |
499 | } | |
500 | VEC_free (oso_el, vec); | |
501 | } | |
502 | ||
503 | /* DSYM (debug symbols) files contain the debug info of an executable. | |
504 | This is a separate file created by dsymutil(1) and is similar to debug | |
505 | link feature on ELF. | |
506 | DSYM files are located in a subdirectory. Append DSYM_SUFFIX to the | |
507 | executable name and the executable base name to get the DSYM file name. */ | |
508 | #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/" | |
509 | ||
510 | /* Check if a dsym file exists for OBJFILE. If so, returns a bfd for it. | |
511 | Return NULL if no valid dsym file is found. */ | |
f192ea96 | 512 | |
a80b95ba TG |
513 | static bfd * |
514 | macho_check_dsym (struct objfile *objfile) | |
515 | { | |
516 | size_t name_len = strlen (objfile->name); | |
517 | size_t dsym_len = strlen (DSYM_SUFFIX); | |
518 | const char *base_name = lbasename (objfile->name); | |
519 | size_t base_len = strlen (base_name); | |
520 | char *dsym_filename = alloca (name_len + dsym_len + base_len + 1); | |
521 | bfd *dsym_bfd; | |
65ccb109 TG |
522 | bfd_mach_o_load_command *main_uuid; |
523 | bfd_mach_o_load_command *dsym_uuid; | |
a80b95ba TG |
524 | |
525 | strcpy (dsym_filename, objfile->name); | |
526 | strcpy (dsym_filename + name_len, DSYM_SUFFIX); | |
527 | strcpy (dsym_filename + name_len + dsym_len, base_name); | |
528 | ||
529 | if (access (dsym_filename, R_OK) != 0) | |
530 | return NULL; | |
531 | ||
65ccb109 TG |
532 | if (bfd_mach_o_lookup_command (objfile->obfd, |
533 | BFD_MACH_O_LC_UUID, &main_uuid) == 0) | |
a80b95ba TG |
534 | { |
535 | warning (_("can't find UUID in %s"), objfile->name); | |
536 | return NULL; | |
537 | } | |
a80b95ba TG |
538 | dsym_filename = xstrdup (dsym_filename); |
539 | dsym_bfd = bfd_openr (dsym_filename, gnutarget); | |
540 | if (dsym_bfd == NULL) | |
541 | { | |
542 | warning (_("can't open dsym file %s"), dsym_filename); | |
543 | xfree (dsym_filename); | |
544 | return NULL; | |
545 | } | |
546 | ||
547 | if (!bfd_check_format (dsym_bfd, bfd_object)) | |
548 | { | |
549 | bfd_close (dsym_bfd); | |
550 | warning (_("bad dsym file format: %s"), bfd_errmsg (bfd_get_error ())); | |
551 | xfree (dsym_filename); | |
552 | return NULL; | |
553 | } | |
554 | ||
65ccb109 TG |
555 | if (bfd_mach_o_lookup_command (dsym_bfd, |
556 | BFD_MACH_O_LC_UUID, &dsym_uuid) == 0) | |
a80b95ba TG |
557 | { |
558 | warning (_("can't find UUID in %s"), dsym_filename); | |
559 | bfd_close (dsym_bfd); | |
560 | xfree (dsym_filename); | |
561 | return NULL; | |
562 | } | |
65ccb109 TG |
563 | if (memcmp (dsym_uuid->command.uuid.uuid, main_uuid->command.uuid.uuid, |
564 | sizeof (main_uuid->command.uuid.uuid))) | |
a80b95ba TG |
565 | { |
566 | warning (_("dsym file UUID doesn't match the one in %s"), objfile->name); | |
567 | bfd_close (dsym_bfd); | |
568 | xfree (dsym_filename); | |
569 | return NULL; | |
570 | } | |
571 | return dsym_bfd; | |
a80b95ba TG |
572 | } |
573 | ||
574 | static void | |
f4352531 | 575 | macho_symfile_read (struct objfile *objfile, int symfile_flags) |
a80b95ba TG |
576 | { |
577 | bfd *abfd = objfile->obfd; | |
578 | struct cleanup *back_to; | |
579 | CORE_ADDR offset; | |
580 | long storage_needed; | |
581 | bfd *dsym_bfd; | |
582 | ||
583 | init_minimal_symbol_collection (); | |
584 | back_to = make_cleanup_discard_minimal_symbols (); | |
585 | ||
586 | /* Get symbols from the symbol table only if the file is an executable. | |
587 | The symbol table of object files is not relocated and is expected to | |
588 | be in the executable. */ | |
cf1061c0 | 589 | if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) |
a80b95ba TG |
590 | { |
591 | /* Process the normal symbol table first. */ | |
592 | storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); | |
593 | if (storage_needed < 0) | |
594 | error (_("Can't read symbols from %s: %s"), | |
595 | bfd_get_filename (objfile->obfd), | |
596 | bfd_errmsg (bfd_get_error ())); | |
597 | ||
598 | if (storage_needed > 0) | |
599 | { | |
600 | asymbol **symbol_table; | |
601 | long symcount; | |
602 | ||
603 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
604 | make_cleanup (xfree, symbol_table); | |
605 | symcount = bfd_canonicalize_symtab (objfile->obfd, symbol_table); | |
606 | ||
607 | if (symcount < 0) | |
608 | error (_("Can't read symbols from %s: %s"), | |
609 | bfd_get_filename (objfile->obfd), | |
610 | bfd_errmsg (bfd_get_error ())); | |
611 | ||
612 | macho_symtab_read (objfile, symcount, symbol_table); | |
613 | } | |
614 | ||
615 | install_minimal_symbols (objfile); | |
616 | ||
cf1061c0 TG |
617 | /* Try to read .eh_frame / .debug_frame. */ |
618 | /* First, locate these sections. We ignore the result status | |
619 | as it only checks for debug info. */ | |
620 | dwarf2_has_info (objfile); | |
621 | dwarf2_build_frame_info (objfile); | |
622 | ||
a80b95ba TG |
623 | /* Check for DSYM file. */ |
624 | dsym_bfd = macho_check_dsym (objfile); | |
625 | if (dsym_bfd != NULL) | |
626 | { | |
627 | int ix; | |
628 | oso_el *oso; | |
6414f3fd | 629 | struct bfd_section *asect, *dsect; |
a80b95ba TG |
630 | |
631 | if (mach_o_debug_level > 0) | |
632 | printf_unfiltered (_("dsym file found\n")); | |
633 | ||
634 | /* Remove oso. They won't be used. */ | |
635 | for (ix = 0; VEC_iterate (oso_el, oso_vector, ix, oso); ix++) | |
636 | { | |
637 | xfree (oso->symbols); | |
638 | xfree (oso->offsets); | |
639 | } | |
640 | VEC_free (oso_el, oso_vector); | |
641 | oso_vector = NULL; | |
642 | ||
6414f3fd TG |
643 | /* Set dsym section size. */ |
644 | for (asect = objfile->obfd->sections, dsect = dsym_bfd->sections; | |
645 | asect && dsect; | |
646 | asect = asect->next, dsect = dsect->next) | |
647 | { | |
648 | if (strcmp (asect->name, dsect->name) != 0) | |
649 | break; | |
650 | bfd_set_section_size (dsym_bfd, dsect, | |
651 | bfd_get_section_size (asect)); | |
652 | } | |
653 | ||
2480cfa0 TG |
654 | /* Add the dsym file as a separate file. */ |
655 | symbol_file_add_separate (dsym_bfd, symfile_flags, objfile); | |
a80b95ba | 656 | |
cf1061c0 | 657 | /* Don't try to read dwarf2 from main file or shared libraries. */ |
2480cfa0 | 658 | return; |
a80b95ba TG |
659 | } |
660 | } | |
661 | ||
662 | if (dwarf2_has_info (objfile)) | |
663 | { | |
664 | /* DWARF 2 sections */ | |
f29dff0a | 665 | dwarf2_build_psymtabs (objfile); |
a80b95ba TG |
666 | } |
667 | ||
cf1061c0 TG |
668 | /* Do not try to read .eh_frame/.debug_frame as they are not relocated |
669 | and dwarf2_build_frame_info cannot deal with unrelocated sections. */ | |
a80b95ba TG |
670 | |
671 | /* Then the oso. */ | |
672 | if (oso_vector != NULL) | |
673 | macho_oso_symfile (objfile); | |
674 | } | |
675 | ||
676 | static void | |
677 | macho_symfile_finish (struct objfile *objfile) | |
678 | { | |
679 | } | |
680 | ||
681 | static void | |
682 | macho_symfile_offsets (struct objfile *objfile, | |
683 | struct section_addr_info *addrs) | |
684 | { | |
685 | unsigned int i; | |
686 | unsigned int num_sections; | |
687 | struct obj_section *osect; | |
688 | ||
689 | /* Allocate section_offsets. */ | |
690 | objfile->num_sections = bfd_count_sections (objfile->obfd); | |
691 | objfile->section_offsets = (struct section_offsets *) | |
692 | obstack_alloc (&objfile->objfile_obstack, | |
693 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
694 | memset (objfile->section_offsets, 0, | |
695 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
696 | ||
697 | /* This code is run when we first add the objfile with | |
698 | symfile_add_with_addrs_or_offsets, when "addrs" not "offsets" are | |
699 | passed in. The place in symfile.c where the addrs are applied | |
700 | depends on the addrs having section names. But in the dyld code | |
701 | we build an anonymous array of addrs, so that code is a no-op. | |
702 | Because of that, we have to apply the addrs to the sections here. | |
703 | N.B. if an objfile slides after we've already created it, then it | |
704 | goes through objfile_relocate. */ | |
705 | ||
706 | for (i = 0; i < addrs->num_sections; i++) | |
707 | { | |
708 | if (addrs->other[i].name == NULL) | |
709 | continue; | |
710 | ||
711 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
712 | { | |
713 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
714 | ||
715 | if (strcmp (bfd_sect_name, addrs->other[i].name) == 0) | |
716 | { | |
717 | obj_section_offset (osect) = addrs->other[i].addr; | |
718 | break; | |
719 | } | |
720 | } | |
721 | } | |
722 | ||
723 | objfile->sect_index_text = 0; | |
724 | ||
725 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
726 | { | |
727 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
728 | int sect_index = osect->the_bfd_section->index; | |
cf1061c0 TG |
729 | |
730 | if (strncmp (bfd_sect_name, "LC_SEGMENT.", 11) == 0) | |
731 | bfd_sect_name += 11; | |
732 | if (strcmp (bfd_sect_name, "__TEXT") == 0 | |
733 | || strcmp (bfd_sect_name, "__TEXT.__text") == 0) | |
a80b95ba TG |
734 | objfile->sect_index_text = sect_index; |
735 | } | |
736 | } | |
737 | ||
738 | static struct sym_fns macho_sym_fns = { | |
739 | bfd_target_mach_o_flavour, | |
740 | ||
741 | macho_new_init, /* sym_new_init: init anything gbl to entire symtab */ | |
742 | macho_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
743 | macho_symfile_read, /* sym_read: read a symbol file into symtab */ | |
744 | macho_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
745 | macho_symfile_offsets, /* sym_offsets: xlate external to internal form */ | |
033c64b7 TG |
746 | default_symfile_segments, /* sym_segments: Get segment information from |
747 | a file. */ | |
a80b95ba TG |
748 | NULL /* next: pointer to next struct sym_fns */ |
749 | }; | |
750 | ||
751 | void | |
752 | _initialize_machoread () | |
753 | { | |
754 | add_symtab_fns (&macho_sym_fns); | |
755 | ||
756 | add_setshow_zinteger_cmd ("mach-o", class_obscure, | |
757 | &mach_o_debug_level, _("\ | |
758 | Set if printing Mach-O symbols processing."), _("\ | |
759 | Show if printing Mach-O symbols processing."), NULL, | |
760 | NULL, NULL, | |
761 | &setdebuglist, &showdebuglist); | |
762 | } |