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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
7b6bb8da | 2 | Copyright (C) 2008, 2009, 2010, 2011 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" |
a80b95ba TG |
36 | |
37 | #include <string.h> | |
38 | ||
39 | /* If non-zero displays debugging message. */ | |
40 | static int mach_o_debug_level = 0; | |
41 | ||
a80b95ba TG |
42 | /* Dwarf debugging information are never in the final executable. They stay |
43 | in object files and the executable contains the list of object files read | |
44 | during the link. | |
45 | Each time an oso (other source) is found in the executable, the reader | |
46 | creates such a structure. They are read after the processing of the | |
025bb325 MS |
47 | executable. */ |
48 | ||
a80b95ba TG |
49 | typedef struct oso_el |
50 | { | |
51 | /* Object file name. */ | |
52 | const char *name; | |
53 | ||
54 | /* Associated time stamp. */ | |
55 | unsigned long mtime; | |
56 | ||
57 | /* Number of sections. This is the length of SYMBOLS and OFFSETS array. */ | |
58 | int num_sections; | |
59 | ||
60 | /* Each seaction of the object file is represented by a symbol and its | |
3188d986 TG |
61 | offset. If the offset is 0, we assume that the symbol is at offset 0 |
62 | in the OSO object file and a symbol lookup in the main file is | |
63 | required to get the offset. */ | |
a80b95ba TG |
64 | asymbol **symbols; |
65 | bfd_vma *offsets; | |
66 | } | |
67 | oso_el; | |
68 | ||
2d33f7b8 TG |
69 | /* Vector of object files to be read after the executable. This is one |
70 | global variable but it's life-time is the one of macho_symfile_read. */ | |
a80b95ba TG |
71 | DEF_VEC_O (oso_el); |
72 | static VEC (oso_el) *oso_vector; | |
73 | ||
2d33f7b8 TG |
74 | static void |
75 | macho_new_init (struct objfile *objfile) | |
76 | { | |
77 | } | |
78 | ||
79 | static void | |
80 | macho_symfile_init (struct objfile *objfile) | |
81 | { | |
82 | objfile->flags |= OBJF_REORDERED; | |
83 | init_entry_point_info (objfile); | |
84 | } | |
85 | ||
86 | /* Add a new OSO to the vector of OSO to load. */ | |
f192ea96 | 87 | |
a80b95ba | 88 | static void |
2d33f7b8 TG |
89 | macho_register_oso (const asymbol *oso_sym, int nbr_sections, |
90 | asymbol **symbols, bfd_vma *offsets) | |
a80b95ba TG |
91 | { |
92 | oso_el el; | |
93 | ||
94 | el.name = oso_sym->name; | |
95 | el.mtime = oso_sym->value; | |
96 | el.num_sections = nbr_sections; | |
97 | el.symbols = symbols; | |
98 | el.offsets = offsets; | |
99 | VEC_safe_push (oso_el, oso_vector, &el); | |
100 | } | |
101 | ||
102 | /* Build the minimal symbol table from SYMBOL_TABLE of length | |
103 | NUMBER_OF_SYMBOLS for OBJFILE. | |
104 | Read OSO files at the end. */ | |
f192ea96 | 105 | |
a80b95ba TG |
106 | static void |
107 | macho_symtab_read (struct objfile *objfile, | |
108 | long number_of_symbols, asymbol **symbol_table) | |
109 | { | |
110 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
111 | long storage_needed; | |
a80b95ba TG |
112 | long i, j; |
113 | CORE_ADDR offset; | |
114 | enum minimal_symbol_type ms_type; | |
115 | unsigned int nbr_sections = bfd_count_sections (objfile->obfd); | |
116 | asymbol **first_symbol = NULL; | |
117 | bfd_vma *first_offset = NULL; | |
118 | const asymbol *oso_file = NULL; | |
119 | ||
120 | for (i = 0; i < number_of_symbols; i++) | |
121 | { | |
bb00b29d TG |
122 | asymbol *sym = symbol_table[i]; |
123 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
124 | ||
a80b95ba TG |
125 | offset = ANOFFSET (objfile->section_offsets, sym->section->index); |
126 | ||
127 | if (sym->flags & BSF_DEBUGGING) | |
128 | { | |
a80b95ba TG |
129 | bfd_vma addr; |
130 | ||
3188d986 TG |
131 | /* Debugging symbols are used to collect OSO file names as well |
132 | as section offsets. */ | |
133 | ||
bb00b29d | 134 | switch (mach_o_sym->n_type) |
a80b95ba TG |
135 | { |
136 | case N_SO: | |
3188d986 TG |
137 | /* An empty SO entry terminates a chunk for an OSO file. */ |
138 | if ((sym->name == NULL || sym->name[0] == 0) && oso_file != NULL) | |
a80b95ba | 139 | { |
2d33f7b8 TG |
140 | macho_register_oso (oso_file, nbr_sections, |
141 | first_symbol, first_offset); | |
a80b95ba TG |
142 | first_symbol = NULL; |
143 | first_offset = NULL; | |
144 | oso_file = NULL; | |
145 | } | |
146 | break; | |
147 | case N_FUN: | |
148 | case N_STSYM: | |
149 | if (sym->name == NULL || sym->name[0] == '\0') | |
150 | break; | |
151 | /* Fall through. */ | |
152 | case N_BNSYM: | |
153 | gdb_assert (oso_file != NULL); | |
154 | addr = sym->value | |
155 | + bfd_get_section_vma (sym->section->bfd, sym->section); | |
156 | if (addr != 0 | |
157 | && first_symbol[sym->section->index] == NULL) | |
158 | { | |
3188d986 | 159 | /* These STAB entries can directly relocate a section. */ |
a80b95ba TG |
160 | first_symbol[sym->section->index] = sym; |
161 | first_offset[sym->section->index] = addr + offset; | |
162 | } | |
163 | break; | |
164 | case N_GSYM: | |
165 | gdb_assert (oso_file != NULL); | |
166 | if (first_symbol[sym->section->index] == NULL) | |
3188d986 TG |
167 | { |
168 | /* This STAB entry needs a symbol look-up to relocate | |
169 | the section. */ | |
170 | first_symbol[sym->section->index] = sym; | |
171 | first_offset[sym->section->index] = 0; | |
172 | } | |
a80b95ba TG |
173 | break; |
174 | case N_OSO: | |
3188d986 | 175 | /* New OSO file. */ |
a80b95ba TG |
176 | gdb_assert (oso_file == NULL); |
177 | first_symbol = (asymbol **)xmalloc (nbr_sections | |
178 | * sizeof (asymbol *)); | |
179 | first_offset = (bfd_vma *)xmalloc (nbr_sections | |
180 | * sizeof (bfd_vma)); | |
181 | for (j = 0; j < nbr_sections; j++) | |
182 | first_symbol[j] = NULL; | |
183 | oso_file = sym; | |
184 | break; | |
185 | } | |
186 | continue; | |
187 | } | |
188 | ||
189 | if (sym->name == NULL || *sym->name == '\0') | |
190 | { | |
191 | /* Skip names that don't exist (shouldn't happen), or names | |
025bb325 | 192 | that are null strings (may happen). */ |
a80b95ba TG |
193 | continue; |
194 | } | |
195 | ||
196 | if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) | |
197 | { | |
198 | struct minimal_symbol *msym; | |
199 | CORE_ADDR symaddr; | |
200 | ||
025bb325 | 201 | /* Bfd symbols are section relative. */ |
a80b95ba TG |
202 | symaddr = sym->value + sym->section->vma; |
203 | ||
204 | /* Select global/local/weak symbols. Note that bfd puts abs | |
205 | symbols in their own section, so all symbols we are | |
025bb325 | 206 | interested in will have a section. */ |
a80b95ba TG |
207 | /* Relocate all non-absolute and non-TLS symbols by the |
208 | section offset. */ | |
209 | if (sym->section != &bfd_abs_section | |
210 | && !(sym->section->flags & SEC_THREAD_LOCAL)) | |
211 | symaddr += offset; | |
212 | ||
213 | if (sym->section == &bfd_abs_section) | |
214 | ms_type = mst_abs; | |
215 | else if (sym->section->flags & SEC_CODE) | |
216 | { | |
217 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
218 | ms_type = mst_text; | |
219 | else | |
220 | ms_type = mst_file_text; | |
221 | } | |
222 | else if (sym->section->flags & SEC_ALLOC) | |
223 | { | |
224 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
225 | { | |
226 | if (sym->section->flags & SEC_LOAD) | |
227 | ms_type = mst_data; | |
228 | else | |
229 | ms_type = mst_bss; | |
230 | } | |
231 | else if (sym->flags & BSF_LOCAL) | |
232 | { | |
233 | /* Not a special stabs-in-elf symbol, do regular | |
234 | symbol processing. */ | |
235 | if (sym->section->flags & SEC_LOAD) | |
236 | ms_type = mst_file_data; | |
237 | else | |
238 | ms_type = mst_file_bss; | |
239 | } | |
240 | else | |
241 | ms_type = mst_unknown; | |
242 | } | |
243 | else | |
025bb325 | 244 | continue; /* Skip this symbol. */ |
a80b95ba TG |
245 | |
246 | gdb_assert (sym->section->index < nbr_sections); | |
247 | if (oso_file != NULL | |
248 | && first_symbol[sym->section->index] == NULL) | |
249 | { | |
3188d986 | 250 | /* Standard symbols can directly relocate sections. */ |
a80b95ba TG |
251 | first_symbol[sym->section->index] = sym; |
252 | first_offset[sym->section->index] = symaddr; | |
253 | } | |
254 | ||
255 | msym = prim_record_minimal_symbol_and_info | |
256 | (sym->name, symaddr, ms_type, sym->section->index, | |
257 | sym->section, objfile); | |
258 | } | |
259 | } | |
260 | ||
3188d986 | 261 | /* Just in case there is no trailing SO entry. */ |
a80b95ba | 262 | if (oso_file != NULL) |
2d33f7b8 | 263 | macho_register_oso (oso_file, nbr_sections, first_symbol, first_offset); |
a80b95ba TG |
264 | } |
265 | ||
266 | /* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'), | |
267 | returns the length of the archive name. | |
268 | Returns -1 otherwise. */ | |
f192ea96 | 269 | |
a80b95ba TG |
270 | static int |
271 | get_archive_prefix_len (const char *name) | |
272 | { | |
273 | char *lparen; | |
274 | int name_len = strlen (name); | |
275 | ||
276 | if (name_len == 0 || name[name_len - 1] != ')') | |
277 | return -1; | |
278 | ||
279 | lparen = strrchr (name, '('); | |
280 | if (lparen == NULL || lparen == name) | |
281 | return -1; | |
282 | return lparen - name; | |
283 | } | |
284 | ||
f192ea96 TG |
285 | static int |
286 | oso_el_compare_name (const void *vl, const void *vr) | |
287 | { | |
288 | const oso_el *l = (const oso_el *)vl; | |
289 | const oso_el *r = (const oso_el *)vr; | |
290 | ||
291 | return strcmp (l->name, r->name); | |
292 | } | |
293 | ||
38947cca JB |
294 | /* Relocate all of ABFD's common symbols immediately. |
295 | ||
296 | This modifies the section and address of all common symbols to become | |
297 | absolute symbols with their address set to match the address given by | |
298 | the main objfile's symbol table. | |
299 | ||
300 | The reason why the common symbols have to be handled separately | |
301 | is because relocation is performed relative to section start. | |
302 | But there is no section in this case. So the "relocation" of | |
303 | these common symbols is performed by finding their address in | |
304 | the main objfile's symbol table, where we know it's been relocated. | |
305 | ||
306 | ABFD is an OSO's bfd. | |
307 | MAIN_OBJFILE is the object file from which the OSO is a part. */ | |
308 | ||
309 | static void | |
310 | macho_relocate_common_syms(bfd *abfd, struct objfile *main_objfile) | |
311 | { | |
312 | int storage; | |
313 | int i; | |
314 | char leading_char; | |
315 | asymbol **symbol_table; | |
316 | ||
317 | storage = bfd_get_symtab_upper_bound (abfd); | |
318 | symbol_table = (asymbol **) xmalloc (storage); | |
319 | bfd_canonicalize_symtab (abfd, symbol_table); | |
320 | ||
321 | leading_char = bfd_get_symbol_leading_char (abfd); | |
322 | ||
323 | for (i = 0; symbol_table[i]; i++) | |
324 | { | |
325 | asymbol *sym = symbol_table[i]; | |
326 | ||
327 | if (bfd_is_com_section (sym->section)) | |
328 | { | |
329 | /* This one must be solved. */ | |
330 | struct minimal_symbol *msym; | |
331 | const char *name = sym->name; | |
332 | ||
333 | if (name[0] == leading_char) | |
334 | name++; | |
335 | ||
336 | msym = lookup_minimal_symbol (name, NULL, main_objfile); | |
337 | if (msym == NULL) | |
338 | { | |
339 | warning (_("can't find symbol '%s' in minsymtab"), name); | |
340 | continue; | |
341 | } | |
342 | else | |
343 | { | |
344 | sym->section = &bfd_abs_section; | |
345 | sym->value = SYMBOL_VALUE_ADDRESS (msym); | |
346 | } | |
347 | } | |
348 | } | |
349 | ||
350 | xfree (symbol_table); | |
351 | } | |
352 | ||
f192ea96 TG |
353 | /* Add an oso file as a symbol file. */ |
354 | ||
355 | static void | |
bdfed3bc TG |
356 | macho_add_oso_symfile (oso_el *oso, bfd *abfd, |
357 | struct objfile *main_objfile, int symfile_flags) | |
f192ea96 | 358 | { |
bdfed3bc | 359 | struct objfile *objfile; |
f192ea96 TG |
360 | int i; |
361 | char leading_char; | |
362 | ||
363 | if (mach_o_debug_level > 0) | |
364 | printf_unfiltered (_("Loading symbols from oso: %s\n"), oso->name); | |
2d33f7b8 | 365 | |
f192ea96 TG |
366 | if (!bfd_check_format (abfd, bfd_object)) |
367 | { | |
368 | warning (_("`%s': can't read symbols: %s."), oso->name, | |
369 | bfd_errmsg (bfd_get_error ())); | |
370 | bfd_close (abfd); | |
371 | return; | |
372 | } | |
373 | ||
374 | bfd_set_cacheable (abfd, 1); | |
f18b4cab TG |
375 | |
376 | /* Relocate sections. */ | |
f192ea96 TG |
377 | |
378 | leading_char = bfd_get_symbol_leading_char (main_objfile->obfd); | |
379 | ||
f192ea96 | 380 | for (i = 0; i < oso->num_sections; i++) |
f192ea96 | 381 | { |
f18b4cab TG |
382 | asection *sect; |
383 | const char *sectname; | |
384 | bfd_vma vma; | |
385 | ||
386 | /* Empty slot. */ | |
387 | if (oso->symbols[i] == NULL) | |
388 | continue; | |
389 | ||
390 | if (oso->offsets[i]) | |
391 | vma = oso->offsets[i]; | |
392 | else | |
393 | { | |
394 | struct minimal_symbol *msym; | |
395 | const char *name = oso->symbols[i]->name; | |
396 | ||
397 | if (name[0] == leading_char) | |
398 | ++name; | |
399 | ||
400 | if (mach_o_debug_level > 3) | |
401 | printf_unfiltered (_("resolve sect %s with %s\n"), | |
402 | oso->symbols[i]->section->name, | |
403 | oso->symbols[i]->name); | |
404 | msym = lookup_minimal_symbol (name, NULL, main_objfile); | |
405 | if (msym == NULL) | |
406 | { | |
407 | warning (_("can't find symbol '%s' in minsymtab"), name); | |
408 | continue; | |
409 | } | |
410 | else | |
411 | vma = SYMBOL_VALUE_ADDRESS (msym); | |
412 | } | |
413 | sectname = (char *)oso->symbols[i]->section->name; | |
414 | ||
415 | sect = bfd_get_section_by_name (abfd, sectname); | |
416 | if (sect == NULL) | |
417 | { | |
418 | warning (_("can't find section '%s' in OSO file %s"), | |
419 | sectname, oso->name); | |
420 | continue; | |
421 | } | |
422 | bfd_set_section_vma (abfd, sect, vma); | |
423 | ||
424 | if (mach_o_debug_level > 1) | |
f192ea96 | 425 | printf_unfiltered (_(" %s: %s\n"), |
f18b4cab | 426 | core_addr_to_string (vma), sectname); |
f192ea96 TG |
427 | } |
428 | ||
38947cca JB |
429 | /* Deal with the common symbols now, as they need special handing. |
430 | Doing it now sets them up so that we don't accidently try to | |
431 | relocate them during the normal relocation phase. */ | |
432 | macho_relocate_common_syms (abfd, main_objfile); | |
433 | ||
bdfed3bc TG |
434 | /* Make sure that the filename was malloc'ed. The current filename comes |
435 | either from an OSO symbol name or from an archive name. Memory for both | |
436 | is not managed by gdb. */ | |
437 | abfd->filename = xstrdup (abfd->filename); | |
438 | ||
439 | /* We need to clear SYMFILE_MAINLINE to avoid interractive question | |
440 | from symfile.c:symbol_file_add_with_addrs_or_offsets. */ | |
441 | objfile = symbol_file_add_from_bfd | |
f18b4cab | 442 | (abfd, symfile_flags & ~(SYMFILE_MAINLINE | SYMFILE_VERBOSE), NULL, |
bdfed3bc | 443 | main_objfile->flags & (OBJF_REORDERED | OBJF_SHARED |
63524580 JK |
444 | | OBJF_READNOW | OBJF_USERLOADED), |
445 | main_objfile); | |
f192ea96 TG |
446 | } |
447 | ||
a80b95ba | 448 | /* Read symbols from the vector of oso files. */ |
f192ea96 | 449 | |
a80b95ba | 450 | static void |
2d33f7b8 | 451 | macho_symfile_read_all_oso (struct objfile *main_objfile, int symfile_flags) |
a80b95ba TG |
452 | { |
453 | int ix; | |
454 | VEC (oso_el) *vec; | |
455 | oso_el *oso; | |
a80b95ba TG |
456 | |
457 | vec = oso_vector; | |
458 | oso_vector = NULL; | |
459 | ||
f192ea96 TG |
460 | /* Sort oso by name so that files from libraries are gathered. */ |
461 | qsort (VEC_address (oso_el, vec), VEC_length (oso_el, vec), | |
462 | sizeof (oso_el), oso_el_compare_name); | |
a80b95ba | 463 | |
f192ea96 | 464 | for (ix = 0; VEC_iterate (oso_el, vec, ix, oso);) |
a80b95ba | 465 | { |
a80b95ba | 466 | int pfx_len; |
a80b95ba TG |
467 | |
468 | /* Check if this is a library name. */ | |
469 | pfx_len = get_archive_prefix_len (oso->name); | |
470 | if (pfx_len > 0) | |
471 | { | |
472 | bfd *archive_bfd; | |
473 | bfd *member_bfd; | |
f192ea96 TG |
474 | char *archive_name = XNEWVEC (char, pfx_len + 1); |
475 | int last_ix; | |
476 | oso_el *oso2; | |
477 | int ix2; | |
a80b95ba | 478 | |
a80b95ba TG |
479 | memcpy (archive_name, oso->name, pfx_len); |
480 | archive_name[pfx_len] = '\0'; | |
481 | ||
f192ea96 TG |
482 | /* Compute number of oso for this archive. */ |
483 | for (last_ix = ix; | |
484 | VEC_iterate (oso_el, vec, last_ix, oso2); last_ix++) | |
485 | { | |
486 | if (strncmp (oso2->name, archive_name, pfx_len) != 0) | |
487 | break; | |
488 | } | |
489 | ||
a80b95ba TG |
490 | /* Open the archive and check the format. */ |
491 | archive_bfd = bfd_openr (archive_name, gnutarget); | |
492 | if (archive_bfd == NULL) | |
493 | { | |
494 | warning (_("Could not open OSO archive file \"%s\""), | |
495 | archive_name); | |
f192ea96 | 496 | ix = last_ix; |
a80b95ba TG |
497 | continue; |
498 | } | |
499 | if (!bfd_check_format (archive_bfd, bfd_archive)) | |
500 | { | |
501 | warning (_("OSO archive file \"%s\" not an archive."), | |
502 | archive_name); | |
503 | bfd_close (archive_bfd); | |
f192ea96 | 504 | ix = last_ix; |
a80b95ba TG |
505 | continue; |
506 | } | |
507 | member_bfd = bfd_openr_next_archived_file (archive_bfd, NULL); | |
508 | ||
509 | if (member_bfd == NULL) | |
510 | { | |
511 | warning (_("Could not read archive members out of " | |
512 | "OSO archive \"%s\""), archive_name); | |
513 | bfd_close (archive_bfd); | |
f192ea96 | 514 | ix = last_ix; |
a80b95ba TG |
515 | continue; |
516 | } | |
f192ea96 TG |
517 | |
518 | /* Load all oso in this library. */ | |
a80b95ba TG |
519 | while (member_bfd != NULL) |
520 | { | |
f192ea96 | 521 | bfd *prev; |
a80b95ba | 522 | const char *member_name = member_bfd->filename; |
f192ea96 TG |
523 | int member_len = strlen (member_name); |
524 | ||
ab7e10a0 | 525 | /* If this member is referenced, add it as a symfile. */ |
f192ea96 TG |
526 | for (ix2 = ix; ix2 < last_ix; ix2++) |
527 | { | |
528 | oso2 = VEC_index (oso_el, vec, ix2); | |
529 | ||
530 | if (oso2->name | |
531 | && strlen (oso2->name) == pfx_len + member_len + 2 | |
532 | && !memcmp (member_name, oso2->name + pfx_len + 1, | |
533 | member_len)) | |
534 | { | |
bdfed3bc TG |
535 | macho_add_oso_symfile (oso2, member_bfd, |
536 | main_objfile, symfile_flags); | |
f192ea96 TG |
537 | oso2->name = NULL; |
538 | break; | |
539 | } | |
540 | } | |
541 | ||
542 | prev = member_bfd; | |
a80b95ba TG |
543 | member_bfd = bfd_openr_next_archived_file |
544 | (archive_bfd, member_bfd); | |
ab7e10a0 TG |
545 | |
546 | /* Free previous member if not referenced by an oso. */ | |
547 | if (ix2 >= last_ix) | |
f192ea96 | 548 | bfd_close (prev); |
a80b95ba | 549 | } |
f192ea96 TG |
550 | for (ix2 = ix; ix2 < last_ix; ix2++) |
551 | { | |
552 | oso_el *oso2 = VEC_index (oso_el, vec, ix2); | |
553 | ||
554 | if (oso2->name != NULL) | |
555 | warning (_("Could not find specified archive member " | |
556 | "for OSO name \"%s\""), oso->name); | |
557 | } | |
558 | ix = last_ix; | |
a80b95ba TG |
559 | } |
560 | else | |
561 | { | |
f192ea96 | 562 | bfd *abfd; |
a80b95ba TG |
563 | |
564 | abfd = bfd_openr (oso->name, gnutarget); | |
565 | if (!abfd) | |
f192ea96 TG |
566 | warning (_("`%s': can't open to read symbols: %s."), oso->name, |
567 | bfd_errmsg (bfd_get_error ())); | |
568 | else | |
bdfed3bc | 569 | macho_add_oso_symfile (oso, abfd, main_objfile, symfile_flags); |
f192ea96 TG |
570 | |
571 | ix++; | |
572 | } | |
573 | } | |
574 | ||
575 | for (ix = 0; VEC_iterate (oso_el, vec, ix, oso); ix++) | |
576 | { | |
a80b95ba TG |
577 | xfree (oso->symbols); |
578 | xfree (oso->offsets); | |
579 | } | |
580 | VEC_free (oso_el, vec); | |
581 | } | |
582 | ||
583 | /* DSYM (debug symbols) files contain the debug info of an executable. | |
584 | This is a separate file created by dsymutil(1) and is similar to debug | |
585 | link feature on ELF. | |
586 | DSYM files are located in a subdirectory. Append DSYM_SUFFIX to the | |
587 | executable name and the executable base name to get the DSYM file name. */ | |
588 | #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/" | |
589 | ||
590 | /* Check if a dsym file exists for OBJFILE. If so, returns a bfd for it. | |
591 | Return NULL if no valid dsym file is found. */ | |
f192ea96 | 592 | |
a80b95ba TG |
593 | static bfd * |
594 | macho_check_dsym (struct objfile *objfile) | |
595 | { | |
596 | size_t name_len = strlen (objfile->name); | |
597 | size_t dsym_len = strlen (DSYM_SUFFIX); | |
598 | const char *base_name = lbasename (objfile->name); | |
599 | size_t base_len = strlen (base_name); | |
600 | char *dsym_filename = alloca (name_len + dsym_len + base_len + 1); | |
601 | bfd *dsym_bfd; | |
65ccb109 TG |
602 | bfd_mach_o_load_command *main_uuid; |
603 | bfd_mach_o_load_command *dsym_uuid; | |
a80b95ba TG |
604 | |
605 | strcpy (dsym_filename, objfile->name); | |
606 | strcpy (dsym_filename + name_len, DSYM_SUFFIX); | |
607 | strcpy (dsym_filename + name_len + dsym_len, base_name); | |
608 | ||
609 | if (access (dsym_filename, R_OK) != 0) | |
610 | return NULL; | |
611 | ||
65ccb109 TG |
612 | if (bfd_mach_o_lookup_command (objfile->obfd, |
613 | BFD_MACH_O_LC_UUID, &main_uuid) == 0) | |
a80b95ba TG |
614 | { |
615 | warning (_("can't find UUID in %s"), objfile->name); | |
616 | return NULL; | |
617 | } | |
a80b95ba TG |
618 | dsym_filename = xstrdup (dsym_filename); |
619 | dsym_bfd = bfd_openr (dsym_filename, gnutarget); | |
620 | if (dsym_bfd == NULL) | |
621 | { | |
622 | warning (_("can't open dsym file %s"), dsym_filename); | |
623 | xfree (dsym_filename); | |
624 | return NULL; | |
625 | } | |
626 | ||
627 | if (!bfd_check_format (dsym_bfd, bfd_object)) | |
628 | { | |
629 | bfd_close (dsym_bfd); | |
630 | warning (_("bad dsym file format: %s"), bfd_errmsg (bfd_get_error ())); | |
631 | xfree (dsym_filename); | |
632 | return NULL; | |
633 | } | |
634 | ||
65ccb109 TG |
635 | if (bfd_mach_o_lookup_command (dsym_bfd, |
636 | BFD_MACH_O_LC_UUID, &dsym_uuid) == 0) | |
a80b95ba TG |
637 | { |
638 | warning (_("can't find UUID in %s"), dsym_filename); | |
639 | bfd_close (dsym_bfd); | |
640 | xfree (dsym_filename); | |
641 | return NULL; | |
642 | } | |
65ccb109 TG |
643 | if (memcmp (dsym_uuid->command.uuid.uuid, main_uuid->command.uuid.uuid, |
644 | sizeof (main_uuid->command.uuid.uuid))) | |
a80b95ba TG |
645 | { |
646 | warning (_("dsym file UUID doesn't match the one in %s"), objfile->name); | |
647 | bfd_close (dsym_bfd); | |
648 | xfree (dsym_filename); | |
649 | return NULL; | |
650 | } | |
651 | return dsym_bfd; | |
a80b95ba TG |
652 | } |
653 | ||
654 | static void | |
f4352531 | 655 | macho_symfile_read (struct objfile *objfile, int symfile_flags) |
a80b95ba TG |
656 | { |
657 | bfd *abfd = objfile->obfd; | |
658 | struct cleanup *back_to; | |
659 | CORE_ADDR offset; | |
660 | long storage_needed; | |
661 | bfd *dsym_bfd; | |
662 | ||
663 | init_minimal_symbol_collection (); | |
664 | back_to = make_cleanup_discard_minimal_symbols (); | |
665 | ||
666 | /* Get symbols from the symbol table only if the file is an executable. | |
667 | The symbol table of object files is not relocated and is expected to | |
668 | be in the executable. */ | |
cf1061c0 | 669 | if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) |
a80b95ba TG |
670 | { |
671 | /* Process the normal symbol table first. */ | |
672 | storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); | |
673 | if (storage_needed < 0) | |
674 | error (_("Can't read symbols from %s: %s"), | |
675 | bfd_get_filename (objfile->obfd), | |
676 | bfd_errmsg (bfd_get_error ())); | |
677 | ||
678 | if (storage_needed > 0) | |
679 | { | |
680 | asymbol **symbol_table; | |
681 | long symcount; | |
682 | ||
683 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
684 | make_cleanup (xfree, symbol_table); | |
685 | symcount = bfd_canonicalize_symtab (objfile->obfd, symbol_table); | |
686 | ||
687 | if (symcount < 0) | |
688 | error (_("Can't read symbols from %s: %s"), | |
689 | bfd_get_filename (objfile->obfd), | |
690 | bfd_errmsg (bfd_get_error ())); | |
691 | ||
692 | macho_symtab_read (objfile, symcount, symbol_table); | |
693 | } | |
694 | ||
695 | install_minimal_symbols (objfile); | |
696 | ||
cf1061c0 TG |
697 | /* Try to read .eh_frame / .debug_frame. */ |
698 | /* First, locate these sections. We ignore the result status | |
699 | as it only checks for debug info. */ | |
251d32d9 | 700 | dwarf2_has_info (objfile, NULL); |
cf1061c0 TG |
701 | dwarf2_build_frame_info (objfile); |
702 | ||
a80b95ba TG |
703 | /* Check for DSYM file. */ |
704 | dsym_bfd = macho_check_dsym (objfile); | |
705 | if (dsym_bfd != NULL) | |
706 | { | |
707 | int ix; | |
708 | oso_el *oso; | |
6414f3fd | 709 | struct bfd_section *asect, *dsect; |
a80b95ba TG |
710 | |
711 | if (mach_o_debug_level > 0) | |
712 | printf_unfiltered (_("dsym file found\n")); | |
713 | ||
714 | /* Remove oso. They won't be used. */ | |
715 | for (ix = 0; VEC_iterate (oso_el, oso_vector, ix, oso); ix++) | |
716 | { | |
717 | xfree (oso->symbols); | |
718 | xfree (oso->offsets); | |
719 | } | |
720 | VEC_free (oso_el, oso_vector); | |
721 | oso_vector = NULL; | |
722 | ||
6414f3fd TG |
723 | /* Set dsym section size. */ |
724 | for (asect = objfile->obfd->sections, dsect = dsym_bfd->sections; | |
725 | asect && dsect; | |
726 | asect = asect->next, dsect = dsect->next) | |
727 | { | |
728 | if (strcmp (asect->name, dsect->name) != 0) | |
729 | break; | |
730 | bfd_set_section_size (dsym_bfd, dsect, | |
731 | bfd_get_section_size (asect)); | |
732 | } | |
733 | ||
2480cfa0 TG |
734 | /* Add the dsym file as a separate file. */ |
735 | symbol_file_add_separate (dsym_bfd, symfile_flags, objfile); | |
a80b95ba | 736 | |
cf1061c0 | 737 | /* Don't try to read dwarf2 from main file or shared libraries. */ |
2480cfa0 | 738 | return; |
a80b95ba TG |
739 | } |
740 | } | |
741 | ||
251d32d9 | 742 | if (dwarf2_has_info (objfile, NULL)) |
a80b95ba TG |
743 | { |
744 | /* DWARF 2 sections */ | |
f29dff0a | 745 | dwarf2_build_psymtabs (objfile); |
a80b95ba TG |
746 | } |
747 | ||
a80b95ba TG |
748 | /* Then the oso. */ |
749 | if (oso_vector != NULL) | |
2d33f7b8 | 750 | macho_symfile_read_all_oso (objfile, symfile_flags); |
a80b95ba TG |
751 | } |
752 | ||
f18b4cab TG |
753 | static bfd_byte * |
754 | macho_symfile_relocate (struct objfile *objfile, asection *sectp, | |
755 | bfd_byte *buf) | |
756 | { | |
757 | bfd *abfd = objfile->obfd; | |
758 | ||
759 | /* We're only interested in sections with relocation | |
760 | information. */ | |
761 | if ((sectp->flags & SEC_RELOC) == 0) | |
762 | return NULL; | |
763 | ||
764 | if (mach_o_debug_level > 0) | |
765 | printf_unfiltered (_("Relocate section '%s' of %s\n"), | |
766 | sectp->name, objfile->name); | |
767 | ||
f18b4cab TG |
768 | return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); |
769 | } | |
770 | ||
a80b95ba TG |
771 | static void |
772 | macho_symfile_finish (struct objfile *objfile) | |
773 | { | |
774 | } | |
775 | ||
776 | static void | |
777 | macho_symfile_offsets (struct objfile *objfile, | |
778 | struct section_addr_info *addrs) | |
779 | { | |
780 | unsigned int i; | |
781 | unsigned int num_sections; | |
782 | struct obj_section *osect; | |
783 | ||
784 | /* Allocate section_offsets. */ | |
785 | objfile->num_sections = bfd_count_sections (objfile->obfd); | |
786 | objfile->section_offsets = (struct section_offsets *) | |
787 | obstack_alloc (&objfile->objfile_obstack, | |
788 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
789 | memset (objfile->section_offsets, 0, | |
790 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
791 | ||
792 | /* This code is run when we first add the objfile with | |
793 | symfile_add_with_addrs_or_offsets, when "addrs" not "offsets" are | |
794 | passed in. The place in symfile.c where the addrs are applied | |
795 | depends on the addrs having section names. But in the dyld code | |
796 | we build an anonymous array of addrs, so that code is a no-op. | |
797 | Because of that, we have to apply the addrs to the sections here. | |
798 | N.B. if an objfile slides after we've already created it, then it | |
799 | goes through objfile_relocate. */ | |
800 | ||
801 | for (i = 0; i < addrs->num_sections; i++) | |
802 | { | |
803 | if (addrs->other[i].name == NULL) | |
804 | continue; | |
805 | ||
806 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
807 | { | |
808 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
809 | ||
810 | if (strcmp (bfd_sect_name, addrs->other[i].name) == 0) | |
811 | { | |
812 | obj_section_offset (osect) = addrs->other[i].addr; | |
813 | break; | |
814 | } | |
815 | } | |
816 | } | |
817 | ||
818 | objfile->sect_index_text = 0; | |
819 | ||
820 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
821 | { | |
822 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
823 | int sect_index = osect->the_bfd_section->index; | |
cf1061c0 TG |
824 | |
825 | if (strncmp (bfd_sect_name, "LC_SEGMENT.", 11) == 0) | |
826 | bfd_sect_name += 11; | |
827 | if (strcmp (bfd_sect_name, "__TEXT") == 0 | |
828 | || strcmp (bfd_sect_name, "__TEXT.__text") == 0) | |
a80b95ba TG |
829 | objfile->sect_index_text = sect_index; |
830 | } | |
831 | } | |
832 | ||
00b5771c | 833 | static const struct sym_fns macho_sym_fns = { |
a80b95ba TG |
834 | bfd_target_mach_o_flavour, |
835 | ||
3e43a32a MS |
836 | macho_new_init, /* init anything gbl to entire symtab */ |
837 | macho_symfile_init, /* read initial info, setup for sym_read() */ | |
838 | macho_symfile_read, /* read a symbol file into symtab */ | |
b11896a5 | 839 | NULL, /* sym_read_psymbols */ |
3e43a32a MS |
840 | macho_symfile_finish, /* finished with file, cleanup */ |
841 | macho_symfile_offsets, /* xlate external to internal form */ | |
842 | default_symfile_segments, /* Get segment information from a file. */ | |
843 | NULL, | |
844 | macho_symfile_relocate, /* Relocate a debug section. */ | |
00b5771c | 845 | &psym_functions |
a80b95ba TG |
846 | }; |
847 | ||
848 | void | |
849 | _initialize_machoread () | |
850 | { | |
851 | add_symtab_fns (&macho_sym_fns); | |
852 | ||
853 | add_setshow_zinteger_cmd ("mach-o", class_obscure, | |
3e43a32a MS |
854 | &mach_o_debug_level, |
855 | _("Set if printing Mach-O symbols processing."), | |
856 | _("Show if printing Mach-O symbols processing."), | |
857 | NULL, NULL, NULL, | |
a80b95ba TG |
858 | &setdebuglist, &showdebuglist); |
859 | } |