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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
42a4f53d | 2 | Copyright (C) 2008-2019 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 | |
47d48711 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
a80b95ba TG |
20 | |
21 | #include "defs.h" | |
22 | #include "symtab.h" | |
23 | #include "gdbtypes.h" | |
24 | #include "bfd.h" | |
25 | #include "symfile.h" | |
26 | #include "objfiles.h" | |
a80b95ba TG |
27 | #include "gdbcmd.h" |
28 | #include "gdbcore.h" | |
29 | #include "mach-o.h" | |
a80b95ba | 30 | #include "aout/stab_gnu.h" |
0747795c | 31 | #include "common/vec.h" |
ccefe4c4 | 32 | #include "psympriv.h" |
e4c5f296 | 33 | #include "complaints.h" |
29f77997 | 34 | #include "gdb_bfd.h" |
af533a5f | 35 | #include <string> |
2cc9b304 | 36 | #include <algorithm> |
a80b95ba | 37 | |
a80b95ba | 38 | /* If non-zero displays debugging message. */ |
ccce17b0 | 39 | static unsigned int mach_o_debug_level = 0; |
a80b95ba | 40 | |
a80b95ba TG |
41 | /* Dwarf debugging information are never in the final executable. They stay |
42 | in object files and the executable contains the list of object files read | |
43 | during the link. | |
44 | Each time an oso (other source) is found in the executable, the reader | |
45 | creates such a structure. They are read after the processing of the | |
025bb325 MS |
46 | executable. */ |
47 | ||
2cc9b304 | 48 | struct oso_el |
a80b95ba | 49 | { |
2cc9b304 TT |
50 | oso_el (asymbol **oso_sym_, asymbol **end_sym_, unsigned int nbr_syms_) |
51 | : name((*oso_sym_)->name), | |
52 | mtime((*oso_sym_)->value), | |
53 | oso_sym(oso_sym_), | |
54 | end_sym(end_sym_), | |
55 | nbr_syms(nbr_syms_) | |
56 | { | |
57 | } | |
58 | ||
e4c5f296 | 59 | /* Object file name. Can also be a member name. */ |
a80b95ba TG |
60 | const char *name; |
61 | ||
62 | /* Associated time stamp. */ | |
63 | unsigned long mtime; | |
64 | ||
e4c5f296 TG |
65 | /* Stab symbols range for this OSO. */ |
66 | asymbol **oso_sym; | |
67 | asymbol **end_sym; | |
a80b95ba | 68 | |
e4c5f296 TG |
69 | /* Number of interesting stabs in the range. */ |
70 | unsigned int nbr_syms; | |
2cc9b304 | 71 | }; |
a80b95ba | 72 | |
2d33f7b8 TG |
73 | static void |
74 | macho_new_init (struct objfile *objfile) | |
75 | { | |
76 | } | |
77 | ||
78 | static void | |
79 | macho_symfile_init (struct objfile *objfile) | |
80 | { | |
81 | objfile->flags |= OBJF_REORDERED; | |
2d33f7b8 TG |
82 | } |
83 | ||
e4c5f296 TG |
84 | /* Add symbol SYM to the minimal symbol table of OBJFILE. */ |
85 | ||
86 | static void | |
8dddcb8f TT |
87 | macho_symtab_add_minsym (minimal_symbol_reader &reader, |
88 | struct objfile *objfile, const asymbol *sym) | |
e4c5f296 TG |
89 | { |
90 | if (sym->name == NULL || *sym->name == '\0') | |
91 | { | |
92 | /* Skip names that don't exist (shouldn't happen), or names | |
93 | that are null strings (may happen). */ | |
94 | return; | |
95 | } | |
96 | ||
97 | if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) | |
98 | { | |
99 | CORE_ADDR symaddr; | |
e4c5f296 TG |
100 | enum minimal_symbol_type ms_type; |
101 | ||
e4c5f296 TG |
102 | /* Bfd symbols are section relative. */ |
103 | symaddr = sym->value + sym->section->vma; | |
104 | ||
45dfa85a | 105 | if (sym->section == bfd_abs_section_ptr) |
e4c5f296 TG |
106 | ms_type = mst_abs; |
107 | else if (sym->section->flags & SEC_CODE) | |
108 | { | |
109 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
110 | ms_type = mst_text; | |
111 | else | |
112 | ms_type = mst_file_text; | |
113 | } | |
114 | else if (sym->section->flags & SEC_ALLOC) | |
115 | { | |
116 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
117 | { | |
118 | if (sym->section->flags & SEC_LOAD) | |
119 | ms_type = mst_data; | |
120 | else | |
121 | ms_type = mst_bss; | |
122 | } | |
123 | else if (sym->flags & BSF_LOCAL) | |
124 | { | |
125 | /* Not a special stabs-in-elf symbol, do regular | |
126 | symbol processing. */ | |
127 | if (sym->section->flags & SEC_LOAD) | |
128 | ms_type = mst_file_data; | |
129 | else | |
130 | ms_type = mst_file_bss; | |
131 | } | |
132 | else | |
133 | ms_type = mst_unknown; | |
134 | } | |
135 | else | |
136 | return; /* Skip this symbol. */ | |
137 | ||
8dddcb8f TT |
138 | reader.record_with_info (sym->name, symaddr, ms_type, |
139 | gdb_bfd_section_index (objfile->obfd, | |
140 | sym->section)); | |
e4c5f296 TG |
141 | } |
142 | } | |
143 | ||
a80b95ba | 144 | /* Build the minimal symbol table from SYMBOL_TABLE of length |
e4c5f296 | 145 | NUMBER_OF_SYMBOLS for OBJFILE. Registers OSO filenames found. */ |
f192ea96 | 146 | |
a80b95ba | 147 | static void |
8dddcb8f TT |
148 | macho_symtab_read (minimal_symbol_reader &reader, |
149 | struct objfile *objfile, | |
8b89a20a | 150 | long number_of_symbols, asymbol **symbol_table, |
2cc9b304 | 151 | std::vector<oso_el> *oso_vector_ptr) |
a80b95ba | 152 | { |
e4c5f296 | 153 | long i; |
e4c5f296 TG |
154 | const asymbol *file_so = NULL; |
155 | asymbol **oso_file = NULL; | |
b0d32fb6 | 156 | unsigned int nbr_syms = 0; |
a80b95ba | 157 | |
e4c5f296 TG |
158 | /* Current state while reading stabs. */ |
159 | enum | |
160 | { | |
161 | /* Not within an SO part. Only non-debugging symbols should be present, | |
162 | and will be added to the minimal symbols table. */ | |
163 | S_NO_SO, | |
bb00b29d | 164 | |
e4c5f296 TG |
165 | /* First SO read. Introduce an SO section, and may be followed by a second |
166 | SO. The SO section should contain onl debugging symbols. */ | |
167 | S_FIRST_SO, | |
a80b95ba | 168 | |
e4c5f296 TG |
169 | /* Second non-null SO found, just after the first one. Means that the first |
170 | is in fact a directory name. */ | |
171 | S_SECOND_SO, | |
a80b95ba | 172 | |
e4c5f296 TG |
173 | /* Non-null OSO found. Debugging info are DWARF in this OSO file. */ |
174 | S_DWARF_FILE, | |
3188d986 | 175 | |
e4c5f296 TG |
176 | S_STAB_FILE |
177 | } state = S_NO_SO; | |
a80b95ba | 178 | |
e4c5f296 TG |
179 | for (i = 0; i < number_of_symbols; i++) |
180 | { | |
181 | const asymbol *sym = symbol_table[i]; | |
182 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
a80b95ba | 183 | |
e4c5f296 TG |
184 | switch (state) |
185 | { | |
186 | case S_NO_SO: | |
187 | if (mach_o_sym->n_type == N_SO) | |
188 | { | |
189 | /* Start of object stab. */ | |
190 | if (sym->name == NULL || sym->name[0] == 0) | |
191 | { | |
192 | /* Unexpected empty N_SO. */ | |
b98664d3 | 193 | complaint (_("Unexpected empty N_SO stab")); |
e4c5f296 TG |
194 | } |
195 | else | |
196 | { | |
197 | file_so = sym; | |
e4c5f296 TG |
198 | state = S_FIRST_SO; |
199 | } | |
200 | } | |
201 | else if (sym->flags & BSF_DEBUGGING) | |
202 | { | |
13b8d0c6 TG |
203 | if (mach_o_sym->n_type == N_OPT) |
204 | { | |
205 | /* No complaint for OPT. */ | |
206 | break; | |
207 | } | |
208 | ||
e4c5f296 | 209 | /* Debugging symbols are not expected here. */ |
b98664d3 | 210 | complaint (_("%s: Unexpected debug stab outside SO markers"), |
4262abfb | 211 | objfile_name (objfile)); |
e4c5f296 TG |
212 | } |
213 | else | |
214 | { | |
215 | /* Non-debugging symbols go to the minimal symbol table. */ | |
8dddcb8f | 216 | macho_symtab_add_minsym (reader, objfile, sym); |
e4c5f296 TG |
217 | } |
218 | break; | |
a80b95ba | 219 | |
e4c5f296 TG |
220 | case S_FIRST_SO: |
221 | case S_SECOND_SO: | |
222 | if (mach_o_sym->n_type == N_SO) | |
223 | { | |
224 | if (sym->name == NULL || sym->name[0] == 0) | |
225 | { | |
226 | /* Unexpected empty N_SO. */ | |
b98664d3 | 227 | complaint (_("Empty SO section")); |
e4c5f296 TG |
228 | state = S_NO_SO; |
229 | } | |
230 | else if (state == S_FIRST_SO) | |
231 | { | |
232 | /* Second SO stab for the file name. */ | |
e4c5f296 TG |
233 | file_so = sym; |
234 | state = S_SECOND_SO; | |
235 | } | |
236 | else | |
b98664d3 | 237 | complaint (_("Three SO in a raw")); |
e4c5f296 TG |
238 | } |
239 | else if (mach_o_sym->n_type == N_OSO) | |
240 | { | |
241 | if (sym->name == NULL || sym->name[0] == 0) | |
242 | { | |
243 | /* Empty OSO. Means that this file was compiled with | |
244 | stabs. */ | |
245 | state = S_STAB_FILE; | |
246 | warning (_("stabs debugging not supported for %s"), | |
247 | file_so->name); | |
248 | } | |
249 | else | |
250 | { | |
251 | /* Non-empty OSO for a Dwarf file. */ | |
252 | oso_file = symbol_table + i; | |
253 | nbr_syms = 0; | |
254 | state = S_DWARF_FILE; | |
255 | } | |
256 | } | |
257 | else | |
b98664d3 | 258 | complaint (_("Unexpected stab after SO")); |
e4c5f296 | 259 | break; |
a80b95ba | 260 | |
e4c5f296 TG |
261 | case S_STAB_FILE: |
262 | case S_DWARF_FILE: | |
263 | if (mach_o_sym->n_type == N_SO) | |
264 | { | |
265 | if (sym->name == NULL || sym->name[0] == 0) | |
266 | { | |
267 | /* End of file. */ | |
268 | if (state == S_DWARF_FILE) | |
2cc9b304 TT |
269 | oso_vector_ptr->emplace_back (oso_file, symbol_table + i, |
270 | nbr_syms); | |
e4c5f296 TG |
271 | state = S_NO_SO; |
272 | } | |
273 | else | |
274 | { | |
b98664d3 | 275 | complaint (_("Missing nul SO")); |
e4c5f296 | 276 | file_so = sym; |
e4c5f296 TG |
277 | state = S_FIRST_SO; |
278 | } | |
279 | } | |
280 | else if (sym->flags & BSF_DEBUGGING) | |
281 | { | |
282 | if (state == S_STAB_FILE) | |
283 | { | |
284 | /* FIXME: to be implemented. */ | |
285 | } | |
286 | else | |
287 | { | |
288 | switch (mach_o_sym->n_type) | |
289 | { | |
290 | case N_FUN: | |
291 | if (sym->name == NULL || sym->name[0] == 0) | |
292 | break; | |
293 | /* Fall through. */ | |
294 | case N_STSYM: | |
295 | /* Interesting symbol. */ | |
296 | nbr_syms++; | |
297 | break; | |
298 | case N_ENSYM: | |
299 | case N_BNSYM: | |
300 | case N_GSYM: | |
301 | break; | |
302 | default: | |
b98664d3 | 303 | complaint (_("unhandled stab for dwarf OSO file")); |
e4c5f296 TG |
304 | break; |
305 | } | |
306 | } | |
307 | } | |
308 | else | |
b98664d3 | 309 | complaint (_("non-debugging symbol within SO")); |
e4c5f296 TG |
310 | break; |
311 | } | |
a80b95ba TG |
312 | } |
313 | ||
e4c5f296 | 314 | if (state != S_NO_SO) |
b98664d3 | 315 | complaint (_("missing nul SO")); |
a80b95ba TG |
316 | } |
317 | ||
318 | /* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'), | |
319 | returns the length of the archive name. | |
320 | Returns -1 otherwise. */ | |
f192ea96 | 321 | |
a80b95ba TG |
322 | static int |
323 | get_archive_prefix_len (const char *name) | |
324 | { | |
2e7bf1d7 | 325 | const char *lparen; |
a80b95ba TG |
326 | int name_len = strlen (name); |
327 | ||
328 | if (name_len == 0 || name[name_len - 1] != ')') | |
329 | return -1; | |
e4c5f296 | 330 | |
a80b95ba TG |
331 | lparen = strrchr (name, '('); |
332 | if (lparen == NULL || lparen == name) | |
333 | return -1; | |
334 | return lparen - name; | |
335 | } | |
336 | ||
2cc9b304 TT |
337 | /* Compare function to std::sort OSOs, so that members of a library |
338 | are gathered. */ | |
e4c5f296 | 339 | |
2cc9b304 TT |
340 | static bool |
341 | oso_el_compare_name (const oso_el &l, const oso_el &r) | |
f192ea96 | 342 | { |
2cc9b304 | 343 | return strcmp (l.name, r.name) < 0; |
f192ea96 TG |
344 | } |
345 | ||
e4c5f296 TG |
346 | /* Hash table entry structure for the stabs symbols in the main object file. |
347 | This is used to speed up lookup for symbols in the OSO. */ | |
38947cca | 348 | |
e4c5f296 TG |
349 | struct macho_sym_hash_entry |
350 | { | |
351 | struct bfd_hash_entry base; | |
352 | const asymbol *sym; | |
353 | }; | |
38947cca | 354 | |
e4c5f296 | 355 | /* Routine to create an entry in the hash table. */ |
38947cca | 356 | |
e4c5f296 TG |
357 | static struct bfd_hash_entry * |
358 | macho_sym_hash_newfunc (struct bfd_hash_entry *entry, | |
359 | struct bfd_hash_table *table, | |
360 | const char *string) | |
38947cca | 361 | { |
e4c5f296 TG |
362 | struct macho_sym_hash_entry *ret = (struct macho_sym_hash_entry *) entry; |
363 | ||
364 | /* Allocate the structure if it has not already been allocated by a | |
365 | subclass. */ | |
366 | if (ret == NULL) | |
367 | ret = (struct macho_sym_hash_entry *) bfd_hash_allocate (table, | |
368 | sizeof (* ret)); | |
369 | if (ret == NULL) | |
370 | return NULL; | |
38947cca | 371 | |
e4c5f296 TG |
372 | /* Call the allocation method of the superclass. */ |
373 | ret = (struct macho_sym_hash_entry *) | |
374 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string); | |
38947cca | 375 | |
e4c5f296 | 376 | if (ret) |
38947cca | 377 | { |
e4c5f296 TG |
378 | /* Initialize the local fields. */ |
379 | ret->sym = NULL; | |
380 | } | |
38947cca | 381 | |
e4c5f296 TG |
382 | return (struct bfd_hash_entry *) ret; |
383 | } | |
38947cca | 384 | |
e4c5f296 TG |
385 | /* Get the value of SYM from the minimal symtab of MAIN_OBJFILE. This is used |
386 | to get the value of global and common symbols. */ | |
38947cca | 387 | |
e4c5f296 TG |
388 | static CORE_ADDR |
389 | macho_resolve_oso_sym_with_minsym (struct objfile *main_objfile, asymbol *sym) | |
390 | { | |
391 | /* For common symbol and global symbols, use the min symtab. */ | |
3b7344d5 | 392 | struct bound_minimal_symbol msym; |
e4c5f296 TG |
393 | const char *name = sym->name; |
394 | ||
395 | if (name[0] == bfd_get_symbol_leading_char (main_objfile->obfd)) | |
396 | ++name; | |
397 | msym = lookup_minimal_symbol (name, NULL, main_objfile); | |
3b7344d5 | 398 | if (msym.minsym == NULL) |
e4c5f296 TG |
399 | { |
400 | warning (_("can't find symbol '%s' in minsymtab"), name); | |
401 | return 0; | |
38947cca | 402 | } |
e4c5f296 | 403 | else |
77e371c0 | 404 | return BMSYMBOL_VALUE_ADDRESS (msym); |
38947cca JB |
405 | } |
406 | ||
e4c5f296 | 407 | /* Add oso file OSO/ABFD as a symbol file. */ |
f192ea96 TG |
408 | |
409 | static void | |
192b62ce TT |
410 | macho_add_oso_symfile (oso_el *oso, const gdb_bfd_ref_ptr &abfd, |
411 | const char *name, | |
b15cc25c PA |
412 | struct objfile *main_objfile, |
413 | symfile_add_flags symfile_flags) | |
f192ea96 | 414 | { |
e4c5f296 | 415 | int storage; |
f192ea96 | 416 | int i; |
e4c5f296 TG |
417 | asymbol **symbol_table; |
418 | asymbol **symp; | |
419 | struct bfd_hash_table table; | |
420 | int nbr_sections; | |
421 | ||
422 | /* Per section flag to mark which section have been rebased. */ | |
423 | unsigned char *sections_rebased; | |
f192ea96 TG |
424 | |
425 | if (mach_o_debug_level > 0) | |
e4c5f296 TG |
426 | printf_unfiltered |
427 | (_("Loading debugging symbols from oso: %s\n"), oso->name); | |
2d33f7b8 | 428 | |
192b62ce | 429 | if (!bfd_check_format (abfd.get (), bfd_object)) |
f192ea96 TG |
430 | { |
431 | warning (_("`%s': can't read symbols: %s."), oso->name, | |
432 | bfd_errmsg (bfd_get_error ())); | |
f192ea96 TG |
433 | return; |
434 | } | |
435 | ||
192b62ce | 436 | if (abfd->my_archive == NULL && oso->mtime != bfd_get_mtime (abfd.get ())) |
e4c5f296 TG |
437 | { |
438 | warning (_("`%s': file time stamp mismatch."), oso->name); | |
e4c5f296 TG |
439 | return; |
440 | } | |
441 | ||
442 | if (!bfd_hash_table_init_n (&table, macho_sym_hash_newfunc, | |
443 | sizeof (struct macho_sym_hash_entry), | |
444 | oso->nbr_syms)) | |
445 | { | |
446 | warning (_("`%s': can't create hash table"), oso->name); | |
e4c5f296 TG |
447 | return; |
448 | } | |
449 | ||
192b62ce | 450 | bfd_set_cacheable (abfd.get (), 1); |
f18b4cab | 451 | |
e4c5f296 | 452 | /* Read symbols table. */ |
192b62ce | 453 | storage = bfd_get_symtab_upper_bound (abfd.get ()); |
e4c5f296 | 454 | symbol_table = (asymbol **) xmalloc (storage); |
192b62ce | 455 | bfd_canonicalize_symtab (abfd.get (), symbol_table); |
f192ea96 | 456 | |
e4c5f296 | 457 | /* Init section flags. */ |
192b62ce | 458 | nbr_sections = bfd_count_sections (abfd.get ()); |
e4c5f296 TG |
459 | sections_rebased = (unsigned char *) alloca (nbr_sections); |
460 | for (i = 0; i < nbr_sections; i++) | |
461 | sections_rebased[i] = 0; | |
f192ea96 | 462 | |
e4c5f296 TG |
463 | /* Put symbols for the OSO file in the hash table. */ |
464 | for (symp = oso->oso_sym; symp != oso->end_sym; symp++) | |
f192ea96 | 465 | { |
e4c5f296 TG |
466 | const asymbol *sym = *symp; |
467 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
f18b4cab | 468 | |
e4c5f296 | 469 | switch (mach_o_sym->n_type) |
f18b4cab | 470 | { |
e4c5f296 TG |
471 | case N_ENSYM: |
472 | case N_BNSYM: | |
473 | case N_GSYM: | |
474 | sym = NULL; | |
475 | break; | |
476 | case N_FUN: | |
477 | if (sym->name == NULL || sym->name[0] == 0) | |
478 | sym = NULL; | |
479 | break; | |
480 | case N_STSYM: | |
481 | break; | |
482 | default: | |
483 | sym = NULL; | |
484 | break; | |
485 | } | |
486 | if (sym != NULL) | |
487 | { | |
488 | struct macho_sym_hash_entry *ent; | |
489 | ||
490 | ent = (struct macho_sym_hash_entry *) | |
491 | bfd_hash_lookup (&table, sym->name, TRUE, FALSE); | |
492 | if (ent->sym != NULL) | |
b98664d3 | 493 | complaint (_("Duplicated symbol %s in symbol table"), sym->name); |
e4c5f296 | 494 | else |
f18b4cab | 495 | { |
e4c5f296 TG |
496 | if (mach_o_debug_level > 4) |
497 | { | |
498 | struct gdbarch *arch = get_objfile_arch (main_objfile); | |
499 | printf_unfiltered | |
500 | (_("Adding symbol %s (addr: %s)\n"), | |
501 | sym->name, paddress (arch, sym->value)); | |
502 | } | |
503 | ent->sym = sym; | |
f18b4cab | 504 | } |
f18b4cab | 505 | } |
e4c5f296 | 506 | } |
f18b4cab | 507 | |
e4c5f296 TG |
508 | /* Relocate symbols of the OSO. */ |
509 | for (i = 0; symbol_table[i]; i++) | |
510 | { | |
511 | asymbol *sym = symbol_table[i]; | |
512 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
513 | ||
514 | if (mach_o_sym->n_type & BFD_MACH_O_N_STAB) | |
515 | continue; | |
516 | if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF | |
517 | && sym->value != 0) | |
f18b4cab | 518 | { |
e4c5f296 TG |
519 | /* For common symbol use the min symtab and modify the OSO |
520 | symbol table. */ | |
521 | CORE_ADDR res; | |
522 | ||
523 | res = macho_resolve_oso_sym_with_minsym (main_objfile, sym); | |
524 | if (res != 0) | |
525 | { | |
45dfa85a | 526 | sym->section = bfd_com_section_ptr; |
e4c5f296 TG |
527 | sym->value = res; |
528 | } | |
f18b4cab | 529 | } |
e4c5f296 TG |
530 | else if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT) |
531 | { | |
532 | /* Normal symbol. */ | |
533 | asection *sec = sym->section; | |
534 | bfd_mach_o_section *msec; | |
535 | unsigned int sec_type; | |
536 | ||
537 | /* Skip buggy ones. */ | |
538 | if (sec == NULL || sections_rebased[sec->index] != 0) | |
539 | continue; | |
540 | ||
541 | /* Only consider regular, non-debugging sections. */ | |
542 | msec = bfd_mach_o_get_mach_o_section (sec); | |
543 | sec_type = msec->flags & BFD_MACH_O_SECTION_TYPE_MASK; | |
544 | if ((sec_type == BFD_MACH_O_S_REGULAR | |
545 | || sec_type == BFD_MACH_O_S_ZEROFILL) | |
546 | && (msec->flags & BFD_MACH_O_S_ATTR_DEBUG) == 0) | |
547 | { | |
548 | CORE_ADDR addr = 0; | |
549 | ||
550 | if ((mach_o_sym->n_type & BFD_MACH_O_N_EXT) != 0) | |
551 | { | |
552 | /* Use the min symtab for global symbols. */ | |
553 | addr = macho_resolve_oso_sym_with_minsym (main_objfile, sym); | |
554 | } | |
555 | else | |
556 | { | |
557 | struct macho_sym_hash_entry *ent; | |
558 | ||
559 | ent = (struct macho_sym_hash_entry *) | |
560 | bfd_hash_lookup (&table, sym->name, FALSE, FALSE); | |
561 | if (ent != NULL) | |
562 | addr = bfd_asymbol_value (ent->sym); | |
563 | } | |
f18b4cab | 564 | |
e4c5f296 TG |
565 | /* Adjust the section. */ |
566 | if (addr != 0) | |
567 | { | |
568 | CORE_ADDR res = addr - sym->value; | |
569 | ||
570 | if (mach_o_debug_level > 3) | |
571 | { | |
572 | struct gdbarch *arch = get_objfile_arch (main_objfile); | |
573 | printf_unfiltered | |
574 | (_("resolve sect %s with %s (set to %s)\n"), | |
575 | sec->name, sym->name, | |
576 | paddress (arch, res)); | |
577 | } | |
192b62ce | 578 | bfd_set_section_vma (abfd.get (), sec, res); |
e4c5f296 TG |
579 | sections_rebased[sec->index] = 1; |
580 | } | |
581 | } | |
582 | else | |
583 | { | |
584 | /* Mark the section as never rebased. */ | |
585 | sections_rebased[sec->index] = 2; | |
586 | } | |
587 | } | |
f192ea96 TG |
588 | } |
589 | ||
e4c5f296 | 590 | bfd_hash_table_free (&table); |
38947cca | 591 | |
bdfed3bc TG |
592 | /* We need to clear SYMFILE_MAINLINE to avoid interractive question |
593 | from symfile.c:symbol_file_add_with_addrs_or_offsets. */ | |
e4c5f296 | 594 | symbol_file_add_from_bfd |
192b62ce TT |
595 | (abfd.get (), name, symfile_flags & ~(SYMFILE_MAINLINE | SYMFILE_VERBOSE), |
596 | NULL, | |
bdfed3bc | 597 | main_objfile->flags & (OBJF_REORDERED | OBJF_SHARED |
63524580 JK |
598 | | OBJF_READNOW | OBJF_USERLOADED), |
599 | main_objfile); | |
f192ea96 TG |
600 | } |
601 | ||
8b89a20a JB |
602 | /* Read symbols from the vector of oso files. |
603 | ||
604 | Note that this function sorts OSO_VECTOR_PTR. */ | |
f192ea96 | 605 | |
a80b95ba | 606 | static void |
2cc9b304 | 607 | macho_symfile_read_all_oso (std::vector<oso_el> *oso_vector_ptr, |
8b89a20a | 608 | struct objfile *main_objfile, |
b15cc25c | 609 | symfile_add_flags symfile_flags) |
a80b95ba TG |
610 | { |
611 | int ix; | |
a80b95ba | 612 | oso_el *oso; |
a80b95ba | 613 | |
f192ea96 | 614 | /* Sort oso by name so that files from libraries are gathered. */ |
2cc9b304 TT |
615 | std::sort (oso_vector_ptr->begin (), oso_vector_ptr->end (), |
616 | oso_el_compare_name); | |
a80b95ba | 617 | |
12a0d0f6 | 618 | for (ix = 0; ix < oso_vector_ptr->size ();) |
a80b95ba | 619 | { |
a80b95ba | 620 | int pfx_len; |
e4c5f296 | 621 | |
2cc9b304 TT |
622 | oso = &(*oso_vector_ptr)[ix]; |
623 | ||
a80b95ba TG |
624 | /* Check if this is a library name. */ |
625 | pfx_len = get_archive_prefix_len (oso->name); | |
626 | if (pfx_len > 0) | |
627 | { | |
f192ea96 TG |
628 | int last_ix; |
629 | oso_el *oso2; | |
630 | int ix2; | |
a80b95ba | 631 | |
af533a5f | 632 | std::string archive_name (oso->name, pfx_len); |
a4453b7e | 633 | |
f192ea96 | 634 | /* Compute number of oso for this archive. */ |
2cc9b304 | 635 | for (last_ix = ix; last_ix < oso_vector_ptr->size (); last_ix++) |
f192ea96 | 636 | { |
2cc9b304 | 637 | oso2 = &(*oso_vector_ptr)[last_ix]; |
af533a5f | 638 | if (strncmp (oso2->name, archive_name.c_str (), pfx_len) != 0) |
f192ea96 TG |
639 | break; |
640 | } | |
e4c5f296 | 641 | |
a80b95ba | 642 | /* Open the archive and check the format. */ |
192b62ce TT |
643 | gdb_bfd_ref_ptr archive_bfd (gdb_bfd_open (archive_name.c_str (), |
644 | gnutarget, -1)); | |
a80b95ba TG |
645 | if (archive_bfd == NULL) |
646 | { | |
647 | warning (_("Could not open OSO archive file \"%s\""), | |
af533a5f | 648 | archive_name.c_str ()); |
f192ea96 | 649 | ix = last_ix; |
a80b95ba TG |
650 | continue; |
651 | } | |
192b62ce | 652 | if (!bfd_check_format (archive_bfd.get (), bfd_archive)) |
a80b95ba TG |
653 | { |
654 | warning (_("OSO archive file \"%s\" not an archive."), | |
af533a5f | 655 | archive_name.c_str ()); |
f192ea96 | 656 | ix = last_ix; |
a80b95ba TG |
657 | continue; |
658 | } | |
a4453b7e | 659 | |
192b62ce TT |
660 | gdb_bfd_ref_ptr member_bfd |
661 | (gdb_bfd_openr_next_archived_file (archive_bfd.get (), NULL)); | |
e4c5f296 | 662 | |
a80b95ba TG |
663 | if (member_bfd == NULL) |
664 | { | |
665 | warning (_("Could not read archive members out of " | |
af533a5f | 666 | "OSO archive \"%s\""), archive_name.c_str ()); |
f192ea96 | 667 | ix = last_ix; |
a80b95ba TG |
668 | continue; |
669 | } | |
f192ea96 TG |
670 | |
671 | /* Load all oso in this library. */ | |
a80b95ba TG |
672 | while (member_bfd != NULL) |
673 | { | |
a80b95ba | 674 | const char *member_name = member_bfd->filename; |
f192ea96 TG |
675 | int member_len = strlen (member_name); |
676 | ||
ab7e10a0 | 677 | /* If this member is referenced, add it as a symfile. */ |
f192ea96 TG |
678 | for (ix2 = ix; ix2 < last_ix; ix2++) |
679 | { | |
2cc9b304 | 680 | oso2 = &(*oso_vector_ptr)[ix2]; |
f192ea96 TG |
681 | |
682 | if (oso2->name | |
683 | && strlen (oso2->name) == pfx_len + member_len + 2 | |
684 | && !memcmp (member_name, oso2->name + pfx_len + 1, | |
685 | member_len)) | |
686 | { | |
bdfed3bc | 687 | macho_add_oso_symfile (oso2, member_bfd, |
24ba069a | 688 | bfd_get_filename (member_bfd), |
bdfed3bc | 689 | main_objfile, symfile_flags); |
f192ea96 TG |
690 | oso2->name = NULL; |
691 | break; | |
692 | } | |
693 | } | |
694 | ||
192b62ce TT |
695 | member_bfd = gdb_bfd_openr_next_archived_file (archive_bfd.get (), |
696 | member_bfd.get ()); | |
a80b95ba | 697 | } |
f192ea96 TG |
698 | for (ix2 = ix; ix2 < last_ix; ix2++) |
699 | { | |
b926417a | 700 | oso2 = &(*oso_vector_ptr)[ix2]; |
f192ea96 TG |
701 | |
702 | if (oso2->name != NULL) | |
703 | warning (_("Could not find specified archive member " | |
704 | "for OSO name \"%s\""), oso->name); | |
705 | } | |
706 | ix = last_ix; | |
a80b95ba TG |
707 | } |
708 | else | |
709 | { | |
192b62ce TT |
710 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (oso->name, gnutarget, -1)); |
711 | if (abfd == NULL) | |
f192ea96 TG |
712 | warning (_("`%s': can't open to read symbols: %s."), oso->name, |
713 | bfd_errmsg (bfd_get_error ())); | |
714 | else | |
24ba069a JK |
715 | macho_add_oso_symfile (oso, abfd, oso->name, main_objfile, |
716 | symfile_flags); | |
f192ea96 TG |
717 | |
718 | ix++; | |
719 | } | |
720 | } | |
a80b95ba TG |
721 | } |
722 | ||
723 | /* DSYM (debug symbols) files contain the debug info of an executable. | |
724 | This is a separate file created by dsymutil(1) and is similar to debug | |
725 | link feature on ELF. | |
726 | DSYM files are located in a subdirectory. Append DSYM_SUFFIX to the | |
727 | executable name and the executable base name to get the DSYM file name. */ | |
728 | #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/" | |
729 | ||
24ba069a | 730 | /* Check if a dsym file exists for OBJFILE. If so, returns a bfd for it |
b577b6af | 731 | and return *FILENAMEP with its original filename. |
24ba069a JK |
732 | Return NULL if no valid dsym file is found (FILENAMEP is not used in |
733 | such case). */ | |
f192ea96 | 734 | |
192b62ce | 735 | static gdb_bfd_ref_ptr |
b577b6af | 736 | macho_check_dsym (struct objfile *objfile, std::string *filenamep) |
a80b95ba | 737 | { |
4262abfb | 738 | size_t name_len = strlen (objfile_name (objfile)); |
a80b95ba | 739 | size_t dsym_len = strlen (DSYM_SUFFIX); |
4262abfb | 740 | const char *base_name = lbasename (objfile_name (objfile)); |
a80b95ba | 741 | size_t base_len = strlen (base_name); |
224c3ddb | 742 | char *dsym_filename = (char *) alloca (name_len + dsym_len + base_len + 1); |
65ccb109 TG |
743 | bfd_mach_o_load_command *main_uuid; |
744 | bfd_mach_o_load_command *dsym_uuid; | |
a80b95ba | 745 | |
4262abfb | 746 | strcpy (dsym_filename, objfile_name (objfile)); |
a80b95ba TG |
747 | strcpy (dsym_filename + name_len, DSYM_SUFFIX); |
748 | strcpy (dsym_filename + name_len + dsym_len, base_name); | |
749 | ||
750 | if (access (dsym_filename, R_OK) != 0) | |
751 | return NULL; | |
752 | ||
65ccb109 TG |
753 | if (bfd_mach_o_lookup_command (objfile->obfd, |
754 | BFD_MACH_O_LC_UUID, &main_uuid) == 0) | |
a80b95ba | 755 | { |
4262abfb | 756 | warning (_("can't find UUID in %s"), objfile_name (objfile)); |
a80b95ba TG |
757 | return NULL; |
758 | } | |
192b62ce | 759 | gdb_bfd_ref_ptr dsym_bfd (gdb_bfd_openr (dsym_filename, gnutarget)); |
a80b95ba TG |
760 | if (dsym_bfd == NULL) |
761 | { | |
762 | warning (_("can't open dsym file %s"), dsym_filename); | |
a80b95ba TG |
763 | return NULL; |
764 | } | |
765 | ||
192b62ce | 766 | if (!bfd_check_format (dsym_bfd.get (), bfd_object)) |
a80b95ba | 767 | { |
a80b95ba | 768 | warning (_("bad dsym file format: %s"), bfd_errmsg (bfd_get_error ())); |
a80b95ba TG |
769 | return NULL; |
770 | } | |
771 | ||
192b62ce | 772 | if (bfd_mach_o_lookup_command (dsym_bfd.get (), |
65ccb109 | 773 | BFD_MACH_O_LC_UUID, &dsym_uuid) == 0) |
a80b95ba TG |
774 | { |
775 | warning (_("can't find UUID in %s"), dsym_filename); | |
a80b95ba TG |
776 | return NULL; |
777 | } | |
65ccb109 TG |
778 | if (memcmp (dsym_uuid->command.uuid.uuid, main_uuid->command.uuid.uuid, |
779 | sizeof (main_uuid->command.uuid.uuid))) | |
a80b95ba | 780 | { |
4262abfb JK |
781 | warning (_("dsym file UUID doesn't match the one in %s"), |
782 | objfile_name (objfile)); | |
a80b95ba TG |
783 | return NULL; |
784 | } | |
b577b6af | 785 | *filenamep = std::string (dsym_filename); |
a80b95ba | 786 | return dsym_bfd; |
a80b95ba TG |
787 | } |
788 | ||
789 | static void | |
b15cc25c | 790 | macho_symfile_read (struct objfile *objfile, symfile_add_flags symfile_flags) |
a80b95ba TG |
791 | { |
792 | bfd *abfd = objfile->obfd; | |
a80b95ba | 793 | long storage_needed; |
2cc9b304 | 794 | std::vector<oso_el> oso_vector; |
63177289 TT |
795 | /* We have to hold on to the symbol table until the call to |
796 | macho_symfile_read_all_oso at the end of this function. */ | |
797 | gdb::def_vector<asymbol *> symbol_table; | |
a80b95ba | 798 | |
a80b95ba TG |
799 | /* Get symbols from the symbol table only if the file is an executable. |
800 | The symbol table of object files is not relocated and is expected to | |
801 | be in the executable. */ | |
cf1061c0 | 802 | if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) |
a80b95ba | 803 | { |
b577b6af | 804 | std::string dsym_filename; |
24ba069a | 805 | |
a80b95ba TG |
806 | /* Process the normal symbol table first. */ |
807 | storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); | |
808 | if (storage_needed < 0) | |
809 | error (_("Can't read symbols from %s: %s"), | |
810 | bfd_get_filename (objfile->obfd), | |
811 | bfd_errmsg (bfd_get_error ())); | |
812 | ||
813 | if (storage_needed > 0) | |
814 | { | |
a80b95ba TG |
815 | long symcount; |
816 | ||
63177289 | 817 | symbol_table.resize (storage_needed / sizeof (asymbol *)); |
e4c5f296 | 818 | |
d25e8719 | 819 | minimal_symbol_reader reader (objfile); |
e4c5f296 | 820 | |
2cc9b304 TT |
821 | symcount = bfd_canonicalize_symtab (objfile->obfd, |
822 | symbol_table.data ()); | |
e4c5f296 | 823 | |
a80b95ba TG |
824 | if (symcount < 0) |
825 | error (_("Can't read symbols from %s: %s"), | |
826 | bfd_get_filename (objfile->obfd), | |
827 | bfd_errmsg (bfd_get_error ())); | |
e4c5f296 | 828 | |
2cc9b304 | 829 | macho_symtab_read (reader, objfile, symcount, symbol_table.data (), |
8dddcb8f | 830 | &oso_vector); |
e4c5f296 | 831 | |
d25e8719 | 832 | reader.install (); |
a80b95ba | 833 | } |
a80b95ba | 834 | |
cf1061c0 TG |
835 | /* Try to read .eh_frame / .debug_frame. */ |
836 | /* First, locate these sections. We ignore the result status | |
837 | as it only checks for debug info. */ | |
251d32d9 | 838 | dwarf2_has_info (objfile, NULL); |
cf1061c0 | 839 | dwarf2_build_frame_info (objfile); |
e4c5f296 | 840 | |
a80b95ba | 841 | /* Check for DSYM file. */ |
192b62ce | 842 | gdb_bfd_ref_ptr dsym_bfd (macho_check_dsym (objfile, &dsym_filename)); |
a80b95ba TG |
843 | if (dsym_bfd != NULL) |
844 | { | |
6414f3fd | 845 | struct bfd_section *asect, *dsect; |
a80b95ba TG |
846 | |
847 | if (mach_o_debug_level > 0) | |
848 | printf_unfiltered (_("dsym file found\n")); | |
849 | ||
6414f3fd TG |
850 | /* Set dsym section size. */ |
851 | for (asect = objfile->obfd->sections, dsect = dsym_bfd->sections; | |
852 | asect && dsect; | |
853 | asect = asect->next, dsect = dsect->next) | |
854 | { | |
855 | if (strcmp (asect->name, dsect->name) != 0) | |
856 | break; | |
192b62ce | 857 | bfd_set_section_size (dsym_bfd.get (), dsect, |
6414f3fd TG |
858 | bfd_get_section_size (asect)); |
859 | } | |
860 | ||
2480cfa0 | 861 | /* Add the dsym file as a separate file. */ |
b577b6af | 862 | symbol_file_add_separate (dsym_bfd.get (), dsym_filename.c_str (), |
192b62ce | 863 | symfile_flags, objfile); |
e4c5f296 | 864 | |
cf1061c0 | 865 | /* Don't try to read dwarf2 from main file or shared libraries. */ |
2480cfa0 | 866 | return; |
a80b95ba TG |
867 | } |
868 | } | |
869 | ||
251d32d9 | 870 | if (dwarf2_has_info (objfile, NULL)) |
a80b95ba TG |
871 | { |
872 | /* DWARF 2 sections */ | |
f29dff0a | 873 | dwarf2_build_psymtabs (objfile); |
a80b95ba TG |
874 | } |
875 | ||
a80b95ba | 876 | /* Then the oso. */ |
2cc9b304 | 877 | if (!oso_vector.empty ()) |
8b89a20a | 878 | macho_symfile_read_all_oso (&oso_vector, objfile, symfile_flags); |
a80b95ba TG |
879 | } |
880 | ||
f18b4cab TG |
881 | static bfd_byte * |
882 | macho_symfile_relocate (struct objfile *objfile, asection *sectp, | |
883 | bfd_byte *buf) | |
884 | { | |
885 | bfd *abfd = objfile->obfd; | |
886 | ||
887 | /* We're only interested in sections with relocation | |
888 | information. */ | |
889 | if ((sectp->flags & SEC_RELOC) == 0) | |
890 | return NULL; | |
891 | ||
892 | if (mach_o_debug_level > 0) | |
893 | printf_unfiltered (_("Relocate section '%s' of %s\n"), | |
4262abfb | 894 | sectp->name, objfile_name (objfile)); |
f18b4cab | 895 | |
f18b4cab TG |
896 | return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); |
897 | } | |
898 | ||
a80b95ba TG |
899 | static void |
900 | macho_symfile_finish (struct objfile *objfile) | |
901 | { | |
902 | } | |
903 | ||
904 | static void | |
905 | macho_symfile_offsets (struct objfile *objfile, | |
37e136b1 | 906 | const section_addr_info &addrs) |
a80b95ba TG |
907 | { |
908 | unsigned int i; | |
a80b95ba TG |
909 | struct obj_section *osect; |
910 | ||
911 | /* Allocate section_offsets. */ | |
912 | objfile->num_sections = bfd_count_sections (objfile->obfd); | |
913 | objfile->section_offsets = (struct section_offsets *) | |
914 | obstack_alloc (&objfile->objfile_obstack, | |
915 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
916 | memset (objfile->section_offsets, 0, | |
917 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
918 | ||
919 | /* This code is run when we first add the objfile with | |
920 | symfile_add_with_addrs_or_offsets, when "addrs" not "offsets" are | |
921 | passed in. The place in symfile.c where the addrs are applied | |
922 | depends on the addrs having section names. But in the dyld code | |
923 | we build an anonymous array of addrs, so that code is a no-op. | |
924 | Because of that, we have to apply the addrs to the sections here. | |
925 | N.B. if an objfile slides after we've already created it, then it | |
926 | goes through objfile_relocate. */ | |
927 | ||
37e136b1 | 928 | for (i = 0; i < addrs.size (); i++) |
a80b95ba | 929 | { |
a80b95ba TG |
930 | ALL_OBJFILE_OSECTIONS (objfile, osect) |
931 | { | |
932 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
933 | ||
37e136b1 | 934 | if (bfd_sect_name == addrs[i].name) |
a80b95ba | 935 | { |
37e136b1 | 936 | obj_section_offset (osect) = addrs[i].addr; |
a80b95ba TG |
937 | break; |
938 | } | |
939 | } | |
940 | } | |
941 | ||
942 | objfile->sect_index_text = 0; | |
943 | ||
944 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
945 | { | |
946 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
65cf3563 | 947 | int sect_index = osect - objfile->sections;; |
e4c5f296 | 948 | |
61012eef | 949 | if (startswith (bfd_sect_name, "LC_SEGMENT.")) |
cf1061c0 TG |
950 | bfd_sect_name += 11; |
951 | if (strcmp (bfd_sect_name, "__TEXT") == 0 | |
952 | || strcmp (bfd_sect_name, "__TEXT.__text") == 0) | |
a80b95ba TG |
953 | objfile->sect_index_text = sect_index; |
954 | } | |
955 | } | |
956 | ||
00b5771c | 957 | static const struct sym_fns macho_sym_fns = { |
3e43a32a MS |
958 | macho_new_init, /* init anything gbl to entire symtab */ |
959 | macho_symfile_init, /* read initial info, setup for sym_read() */ | |
960 | macho_symfile_read, /* read a symbol file into symtab */ | |
b11896a5 | 961 | NULL, /* sym_read_psymbols */ |
3e43a32a MS |
962 | macho_symfile_finish, /* finished with file, cleanup */ |
963 | macho_symfile_offsets, /* xlate external to internal form */ | |
964 | default_symfile_segments, /* Get segment information from a file. */ | |
965 | NULL, | |
966 | macho_symfile_relocate, /* Relocate a debug section. */ | |
55aa24fb | 967 | NULL, /* sym_get_probes */ |
00b5771c | 968 | &psym_functions |
a80b95ba TG |
969 | }; |
970 | ||
971 | void | |
dd9aa048 | 972 | _initialize_machoread (void) |
a80b95ba | 973 | { |
c256e171 | 974 | add_symtab_fns (bfd_target_mach_o_flavour, &macho_sym_fns); |
a80b95ba | 975 | |
ccce17b0 YQ |
976 | add_setshow_zuinteger_cmd ("mach-o", class_obscure, |
977 | &mach_o_debug_level, | |
978 | _("Set if printing Mach-O symbols processing."), | |
979 | _("Show if printing Mach-O symbols processing."), | |
980 | NULL, NULL, NULL, | |
981 | &setdebuglist, &showdebuglist); | |
a80b95ba | 982 | } |