Commit | Line | Data |
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c906108c | 1 | /* GDB routines for manipulating objfiles. |
af5f3db6 | 2 | |
28e7fd62 | 3 | Copyright (C) 1992-2013 Free Software Foundation, Inc. |
af5f3db6 | 4 | |
c906108c SS |
5 | Contributed by Cygnus Support, using pieces from other GDB modules. |
6 | ||
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | /* This file contains support routines for creating, manipulating, and | |
0df8b418 | 23 | destroying objfile structures. */ |
c906108c SS |
24 | |
25 | #include "defs.h" | |
26 | #include "bfd.h" /* Binary File Description */ | |
27 | #include "symtab.h" | |
28 | #include "symfile.h" | |
29 | #include "objfiles.h" | |
30 | #include "gdb-stabs.h" | |
31 | #include "target.h" | |
af5f3db6 | 32 | #include "bcache.h" |
9bdcbae7 DJ |
33 | #include "expression.h" |
34 | #include "parser-defs.h" | |
35 | ||
0d0e1a63 | 36 | #include "gdb_assert.h" |
c906108c | 37 | #include <sys/types.h> |
53ce3c39 | 38 | #include <sys/stat.h> |
c906108c | 39 | #include <fcntl.h> |
04ea0df1 | 40 | #include "gdb_obstack.h" |
0e9f083f | 41 | #include <string.h> |
2de7ced7 | 42 | #include "hashtab.h" |
c906108c | 43 | |
7a292a7a | 44 | #include "breakpoint.h" |
fe898f56 | 45 | #include "block.h" |
de4f826b | 46 | #include "dictionary.h" |
cb5d864f | 47 | #include "source.h" |
801e3a5b | 48 | #include "addrmap.h" |
5e2b427d | 49 | #include "arch-utils.h" |
30510692 | 50 | #include "exec.h" |
a845f5cb | 51 | #include "observer.h" |
6fbf07cd | 52 | #include "complaints.h" |
ccefe4c4 | 53 | #include "psymtab.h" |
0133421a | 54 | #include "solist.h" |
cbb099e8 | 55 | #include "gdb_bfd.h" |
afedecd3 | 56 | #include "btrace.h" |
7a292a7a | 57 | |
8e260fc0 TT |
58 | /* Keep a registry of per-objfile data-pointers required by other GDB |
59 | modules. */ | |
c906108c | 60 | |
6b81941e | 61 | DEFINE_REGISTRY (objfile, REGISTRY_ACCESS_FIELD) |
0d0e1a63 | 62 | |
c906108c | 63 | /* Externally visible variables that are owned by this module. |
0df8b418 | 64 | See declarations in objfile.h for more info. */ |
c906108c | 65 | |
6c95b8df PA |
66 | struct objfile_pspace_info |
67 | { | |
6c95b8df PA |
68 | struct obj_section **sections; |
69 | int num_sections; | |
607ece04 GB |
70 | |
71 | /* Nonzero if object files have been added since the section map | |
72 | was last updated. */ | |
73 | int new_objfiles_available; | |
74 | ||
75 | /* Nonzero if the section map MUST be updated before use. */ | |
76 | int section_map_dirty; | |
77 | ||
78 | /* Nonzero if section map updates should be inhibited if possible. */ | |
79 | int inhibit_updates; | |
6c95b8df PA |
80 | }; |
81 | ||
82 | /* Per-program-space data key. */ | |
83 | static const struct program_space_data *objfiles_pspace_data; | |
84 | ||
85 | static void | |
86 | objfiles_pspace_data_cleanup (struct program_space *pspace, void *arg) | |
87 | { | |
487ad57c | 88 | struct objfile_pspace_info *info = arg; |
6c95b8df | 89 | |
487ad57c YQ |
90 | xfree (info->sections); |
91 | xfree (info); | |
6c95b8df PA |
92 | } |
93 | ||
94 | /* Get the current svr4 data. If none is found yet, add it now. This | |
95 | function always returns a valid object. */ | |
96 | ||
97 | static struct objfile_pspace_info * | |
98 | get_objfile_pspace_data (struct program_space *pspace) | |
99 | { | |
100 | struct objfile_pspace_info *info; | |
101 | ||
102 | info = program_space_data (pspace, objfiles_pspace_data); | |
103 | if (info == NULL) | |
104 | { | |
105 | info = XZALLOC (struct objfile_pspace_info); | |
106 | set_program_space_data (pspace, objfiles_pspace_data, info); | |
107 | } | |
108 | ||
109 | return info; | |
110 | } | |
111 | ||
706e3705 TT |
112 | \f |
113 | ||
114 | /* Per-BFD data key. */ | |
115 | ||
116 | static const struct bfd_data *objfiles_bfd_data; | |
117 | ||
118 | /* Create the per-BFD storage object for OBJFILE. If ABFD is not | |
119 | NULL, and it already has a per-BFD storage object, use that. | |
120 | Otherwise, allocate a new per-BFD storage object. If ABFD is not | |
121 | NULL, the object is allocated on the BFD; otherwise it is allocated | |
122 | on OBJFILE's obstack. Note that it is not safe to call this | |
123 | multiple times for a given OBJFILE -- it can only be called when | |
124 | allocating or re-initializing OBJFILE. */ | |
125 | ||
126 | static struct objfile_per_bfd_storage * | |
127 | get_objfile_bfd_data (struct objfile *objfile, struct bfd *abfd) | |
128 | { | |
129 | struct objfile_per_bfd_storage *storage = NULL; | |
130 | ||
131 | if (abfd != NULL) | |
132 | storage = bfd_data (abfd, objfiles_bfd_data); | |
133 | ||
134 | if (storage == NULL) | |
135 | { | |
1da77581 TT |
136 | /* If the object requires gdb to do relocations, we simply fall |
137 | back to not sharing data across users. These cases are rare | |
138 | enough that this seems reasonable. */ | |
139 | if (abfd != NULL && !gdb_bfd_requires_relocations (abfd)) | |
706e3705 TT |
140 | { |
141 | storage = bfd_zalloc (abfd, sizeof (struct objfile_per_bfd_storage)); | |
142 | set_bfd_data (abfd, objfiles_bfd_data, storage); | |
143 | } | |
144 | else | |
145 | storage = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
146 | struct objfile_per_bfd_storage); | |
147 | ||
1da77581 TT |
148 | /* Look up the gdbarch associated with the BFD. */ |
149 | if (abfd != NULL) | |
150 | storage->gdbarch = gdbarch_from_bfd (abfd); | |
151 | ||
706e3705 TT |
152 | obstack_init (&storage->storage_obstack); |
153 | storage->filename_cache = bcache_xmalloc (NULL, NULL); | |
6532ff36 | 154 | storage->macro_cache = bcache_xmalloc (NULL, NULL); |
706e3705 TT |
155 | } |
156 | ||
157 | return storage; | |
158 | } | |
159 | ||
160 | /* Free STORAGE. */ | |
161 | ||
162 | static void | |
163 | free_objfile_per_bfd_storage (struct objfile_per_bfd_storage *storage) | |
164 | { | |
165 | bcache_xfree (storage->filename_cache); | |
6532ff36 | 166 | bcache_xfree (storage->macro_cache); |
84a1243b TT |
167 | if (storage->demangled_names_hash) |
168 | htab_delete (storage->demangled_names_hash); | |
706e3705 TT |
169 | obstack_free (&storage->storage_obstack, 0); |
170 | } | |
171 | ||
172 | /* A wrapper for free_objfile_per_bfd_storage that can be passed as a | |
173 | cleanup function to the BFD registry. */ | |
174 | ||
175 | static void | |
176 | objfile_bfd_data_free (struct bfd *unused, void *d) | |
177 | { | |
178 | free_objfile_per_bfd_storage (d); | |
179 | } | |
180 | ||
181 | /* See objfiles.h. */ | |
182 | ||
183 | void | |
184 | set_objfile_per_bfd (struct objfile *objfile) | |
185 | { | |
186 | objfile->per_bfd = get_objfile_bfd_data (objfile, objfile->obfd); | |
187 | } | |
188 | ||
189 | \f | |
190 | ||
96baa820 JM |
191 | /* Called via bfd_map_over_sections to build up the section table that |
192 | the objfile references. The objfile contains pointers to the start | |
193 | of the table (objfile->sections) and to the first location after | |
0df8b418 | 194 | the end of the table (objfile->sections_end). */ |
96baa820 | 195 | |
65cf3563 TT |
196 | static void |
197 | add_to_objfile_sections_full (struct bfd *abfd, struct bfd_section *asect, | |
198 | struct objfile *objfile, int force) | |
199 | { | |
200 | struct obj_section *section; | |
201 | ||
202 | if (!force) | |
203 | { | |
204 | flagword aflag; | |
205 | ||
206 | aflag = bfd_get_section_flags (abfd, asect); | |
207 | if (!(aflag & SEC_ALLOC)) | |
208 | return; | |
209 | } | |
210 | ||
211 | section = &objfile->sections[gdb_bfd_section_index (abfd, asect)]; | |
212 | section->objfile = objfile; | |
213 | section->the_bfd_section = asect; | |
214 | section->ovly_mapped = 0; | |
215 | } | |
216 | ||
c906108c | 217 | static void |
7be0c536 | 218 | add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect, |
d82ea6a8 | 219 | void *objfilep) |
c906108c | 220 | { |
65cf3563 | 221 | add_to_objfile_sections_full (abfd, asect, objfilep, 0); |
c906108c SS |
222 | } |
223 | ||
224 | /* Builds a section table for OBJFILE. | |
96baa820 | 225 | |
65cf3563 TT |
226 | Note that the OFFSET and OVLY_MAPPED in each table entry are |
227 | initialized to zero. */ | |
c906108c | 228 | |
d82ea6a8 | 229 | void |
fba45db2 | 230 | build_objfile_section_table (struct objfile *objfile) |
c906108c | 231 | { |
65cf3563 TT |
232 | int count = gdb_bfd_count_sections (objfile->obfd); |
233 | ||
234 | objfile->sections = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
235 | count, | |
236 | struct obj_section); | |
237 | objfile->sections_end = (objfile->sections + count); | |
f1f6aadf PA |
238 | bfd_map_over_sections (objfile->obfd, |
239 | add_to_objfile_sections, (void *) objfile); | |
65cf3563 TT |
240 | |
241 | /* See gdb_bfd_section_index. */ | |
242 | add_to_objfile_sections_full (objfile->obfd, bfd_com_section_ptr, objfile, 1); | |
243 | add_to_objfile_sections_full (objfile->obfd, bfd_und_section_ptr, objfile, 1); | |
244 | add_to_objfile_sections_full (objfile->obfd, bfd_abs_section_ptr, objfile, 1); | |
245 | add_to_objfile_sections_full (objfile->obfd, bfd_ind_section_ptr, objfile, 1); | |
c906108c SS |
246 | } |
247 | ||
2df3850c JM |
248 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits |
249 | allocate a new objfile struct, fill it in as best we can, link it | |
250 | into the list of all known objfiles, and return a pointer to the | |
251 | new objfile struct. | |
c906108c | 252 | |
24ba069a JK |
253 | NAME should contain original non-canonicalized filename or other |
254 | identifier as entered by user. If there is no better source use | |
255 | bfd_get_filename (ABFD). NAME may be NULL only if ABFD is NULL. | |
256 | NAME content is copied into returned objfile. | |
257 | ||
2df3850c | 258 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
78a4a9b9 | 259 | requests for specific operations. Other bits like OBJF_SHARED are |
0df8b418 | 260 | simply copied through to the new objfile flags member. */ |
c906108c | 261 | |
eb9a305d DC |
262 | /* NOTE: carlton/2003-02-04: This function is called with args NULL, 0 |
263 | by jv-lang.c, to create an artificial objfile used to hold | |
264 | information about dynamically-loaded Java classes. Unfortunately, | |
265 | that branch of this function doesn't get tested very frequently, so | |
266 | it's prone to breakage. (E.g. at one time the name was set to NULL | |
267 | in that situation, which broke a loop over all names in the dynamic | |
268 | library loader.) If you change this function, please try to leave | |
269 | things in a consistent state even if abfd is NULL. */ | |
270 | ||
c906108c | 271 | struct objfile * |
24ba069a | 272 | allocate_objfile (bfd *abfd, const char *name, int flags) |
c906108c | 273 | { |
2f6e5d7e | 274 | struct objfile *objfile; |
04affae3 | 275 | char *expanded_name; |
c906108c | 276 | |
6a0fa043 | 277 | objfile = (struct objfile *) xzalloc (sizeof (struct objfile)); |
710e1a31 | 278 | objfile->psymbol_cache = psymbol_bcache_init (); |
2f6e5d7e TG |
279 | /* We could use obstack_specify_allocation here instead, but |
280 | gdb_obstack.h specifies the alloc/dealloc functions. */ | |
281 | obstack_init (&objfile->objfile_obstack); | |
282 | terminate_minimal_symbol_table (objfile); | |
c906108c | 283 | |
0d0e1a63 MK |
284 | objfile_alloc_data (objfile); |
285 | ||
24ba069a JK |
286 | if (name == NULL) |
287 | { | |
288 | gdb_assert (abfd == NULL); | |
40135bb1 | 289 | gdb_assert ((flags & OBJF_NOT_FILENAME) != 0); |
04affae3 | 290 | expanded_name = xstrdup ("<<anonymous objfile>>"); |
24ba069a | 291 | } |
04affae3 JK |
292 | else if ((flags & OBJF_NOT_FILENAME) != 0) |
293 | expanded_name = xstrdup (name); | |
294 | else | |
295 | expanded_name = gdb_abspath (name); | |
296 | objfile->original_name = obstack_copy0 (&objfile->objfile_obstack, | |
297 | expanded_name, | |
298 | strlen (expanded_name)); | |
299 | xfree (expanded_name); | |
300 | ||
301 | /* Update the per-objfile information that comes from the bfd, ensuring | |
302 | that any data that is reference is saved in the per-objfile data | |
303 | region. */ | |
24ba069a | 304 | |
d3e81981 DE |
305 | /* Update the per-objfile information that comes from the bfd, ensuring |
306 | that any data that is reference is saved in the per-objfile data | |
307 | region. */ | |
308 | ||
cbb099e8 | 309 | objfile->obfd = abfd; |
8ac244b4 | 310 | gdb_bfd_ref (abfd); |
c906108c SS |
311 | if (abfd != NULL) |
312 | { | |
c5aa993b | 313 | objfile->mtime = bfd_get_mtime (abfd); |
c906108c SS |
314 | |
315 | /* Build section table. */ | |
d82ea6a8 | 316 | build_objfile_section_table (objfile); |
c906108c SS |
317 | } |
318 | ||
706e3705 | 319 | objfile->per_bfd = get_objfile_bfd_data (objfile, abfd); |
6c95b8df PA |
320 | objfile->pspace = current_program_space; |
321 | ||
b8fbeb18 | 322 | /* Initialize the section indexes for this objfile, so that we can |
0df8b418 | 323 | later detect if they are used w/o being properly assigned to. */ |
b8fbeb18 | 324 | |
5c4e30ca DC |
325 | objfile->sect_index_text = -1; |
326 | objfile->sect_index_data = -1; | |
327 | objfile->sect_index_bss = -1; | |
328 | objfile->sect_index_rodata = -1; | |
329 | ||
0df8b418 | 330 | /* Add this file onto the tail of the linked list of other such files. */ |
c906108c | 331 | |
c5aa993b | 332 | objfile->next = NULL; |
c906108c SS |
333 | if (object_files == NULL) |
334 | object_files = objfile; | |
335 | else | |
336 | { | |
2f6e5d7e TG |
337 | struct objfile *last_one; |
338 | ||
c906108c | 339 | for (last_one = object_files; |
c5aa993b JM |
340 | last_one->next; |
341 | last_one = last_one->next); | |
342 | last_one->next = objfile; | |
c906108c SS |
343 | } |
344 | ||
0df8b418 | 345 | /* Save passed in flag bits. */ |
2df3850c | 346 | objfile->flags |= flags; |
c906108c | 347 | |
6c95b8df | 348 | /* Rebuild section map next time we need it. */ |
607ece04 | 349 | get_objfile_pspace_data (objfile->pspace)->new_objfiles_available = 1; |
bb272892 | 350 | |
6c95b8df | 351 | return objfile; |
c906108c SS |
352 | } |
353 | ||
5e2b427d UW |
354 | /* Retrieve the gdbarch associated with OBJFILE. */ |
355 | struct gdbarch * | |
356 | get_objfile_arch (struct objfile *objfile) | |
357 | { | |
df6d5441 | 358 | return objfile->per_bfd->gdbarch; |
5e2b427d UW |
359 | } |
360 | ||
abd0a5fa JK |
361 | /* If there is a valid and known entry point, function fills *ENTRY_P with it |
362 | and returns non-zero; otherwise it returns zero. */ | |
9ab9195f | 363 | |
abd0a5fa JK |
364 | int |
365 | entry_point_address_query (CORE_ADDR *entry_p) | |
9ab9195f | 366 | { |
abd0a5fa | 367 | if (symfile_objfile == NULL || !symfile_objfile->ei.entry_point_p) |
3612b192 DJ |
368 | return 0; |
369 | ||
8c2b9656 | 370 | *entry_p = symfile_objfile->ei.entry_point; |
3612b192 | 371 | |
abd0a5fa JK |
372 | return 1; |
373 | } | |
374 | ||
375 | /* Get current entry point address. Call error if it is not known. */ | |
376 | ||
377 | CORE_ADDR | |
378 | entry_point_address (void) | |
379 | { | |
380 | CORE_ADDR retval; | |
381 | ||
382 | if (!entry_point_address_query (&retval)) | |
383 | error (_("Entry point address is not known.")); | |
384 | ||
385 | return retval; | |
9ab9195f | 386 | } |
15831452 | 387 | |
15d123c9 TG |
388 | /* Iterator on PARENT and every separate debug objfile of PARENT. |
389 | The usage pattern is: | |
390 | for (objfile = parent; | |
391 | objfile; | |
392 | objfile = objfile_separate_debug_iterate (parent, objfile)) | |
393 | ... | |
394 | */ | |
395 | ||
396 | struct objfile * | |
397 | objfile_separate_debug_iterate (const struct objfile *parent, | |
398 | const struct objfile *objfile) | |
399 | { | |
400 | struct objfile *res; | |
401 | ||
399f313b | 402 | /* If any, return the first child. */ |
15d123c9 TG |
403 | res = objfile->separate_debug_objfile; |
404 | if (res) | |
405 | return res; | |
406 | ||
15d123c9 TG |
407 | /* Common case where there is no separate debug objfile. */ |
408 | if (objfile == parent) | |
409 | return NULL; | |
410 | ||
399f313b TG |
411 | /* Return the brother if any. Note that we don't iterate on brothers of |
412 | the parents. */ | |
413 | res = objfile->separate_debug_objfile_link; | |
414 | if (res) | |
415 | return res; | |
416 | ||
15d123c9 TG |
417 | for (res = objfile->separate_debug_objfile_backlink; |
418 | res != parent; | |
419 | res = res->separate_debug_objfile_backlink) | |
420 | { | |
421 | gdb_assert (res != NULL); | |
422 | if (res->separate_debug_objfile_link) | |
423 | return res->separate_debug_objfile_link; | |
424 | } | |
425 | return NULL; | |
426 | } | |
15831452 | 427 | |
5b5d99cf JB |
428 | /* Put one object file before a specified on in the global list. |
429 | This can be used to make sure an object file is destroyed before | |
0df8b418 | 430 | another when using ALL_OBJFILES_SAFE to free all objfiles. */ |
5b5d99cf JB |
431 | void |
432 | put_objfile_before (struct objfile *objfile, struct objfile *before_this) | |
433 | { | |
434 | struct objfile **objp; | |
435 | ||
436 | unlink_objfile (objfile); | |
437 | ||
438 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
439 | { | |
440 | if (*objp == before_this) | |
441 | { | |
442 | objfile->next = *objp; | |
443 | *objp = objfile; | |
444 | return; | |
445 | } | |
446 | } | |
447 | ||
448 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 449 | _("put_objfile_before: before objfile not in list")); |
5b5d99cf JB |
450 | } |
451 | ||
c906108c SS |
452 | /* Put OBJFILE at the front of the list. */ |
453 | ||
454 | void | |
fba45db2 | 455 | objfile_to_front (struct objfile *objfile) |
c906108c SS |
456 | { |
457 | struct objfile **objp; | |
458 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
459 | { | |
460 | if (*objp == objfile) | |
461 | { | |
462 | /* Unhook it from where it is. */ | |
463 | *objp = objfile->next; | |
464 | /* Put it in the front. */ | |
465 | objfile->next = object_files; | |
466 | object_files = objfile; | |
467 | break; | |
468 | } | |
469 | } | |
470 | } | |
471 | ||
472 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the | |
473 | list. | |
474 | ||
475 | It is not a bug, or error, to call this function if OBJFILE is not known | |
476 | to be in the current list. This is done in the case of mapped objfiles, | |
477 | for example, just to ensure that the mapped objfile doesn't appear twice | |
478 | in the list. Since the list is threaded, linking in a mapped objfile | |
479 | twice would create a circular list. | |
480 | ||
481 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
482 | unlinking it, just to ensure that we have completely severed any linkages | |
0df8b418 | 483 | between the OBJFILE and the list. */ |
c906108c SS |
484 | |
485 | void | |
fba45db2 | 486 | unlink_objfile (struct objfile *objfile) |
c906108c | 487 | { |
c5aa993b | 488 | struct objfile **objpp; |
c906108c | 489 | |
c5aa993b | 490 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
c906108c | 491 | { |
c5aa993b | 492 | if (*objpp == objfile) |
c906108c | 493 | { |
c5aa993b JM |
494 | *objpp = (*objpp)->next; |
495 | objfile->next = NULL; | |
07cd4b97 | 496 | return; |
c906108c SS |
497 | } |
498 | } | |
07cd4b97 | 499 | |
8e65ff28 | 500 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 501 | _("unlink_objfile: objfile already unlinked")); |
c906108c SS |
502 | } |
503 | ||
15d123c9 TG |
504 | /* Add OBJFILE as a separate debug objfile of PARENT. */ |
505 | ||
506 | void | |
507 | add_separate_debug_objfile (struct objfile *objfile, struct objfile *parent) | |
508 | { | |
509 | gdb_assert (objfile && parent); | |
510 | ||
511 | /* Must not be already in a list. */ | |
512 | gdb_assert (objfile->separate_debug_objfile_backlink == NULL); | |
513 | gdb_assert (objfile->separate_debug_objfile_link == NULL); | |
8a92335b JK |
514 | gdb_assert (objfile->separate_debug_objfile == NULL); |
515 | gdb_assert (parent->separate_debug_objfile_backlink == NULL); | |
516 | gdb_assert (parent->separate_debug_objfile_link == NULL); | |
15d123c9 TG |
517 | |
518 | objfile->separate_debug_objfile_backlink = parent; | |
519 | objfile->separate_debug_objfile_link = parent->separate_debug_objfile; | |
520 | parent->separate_debug_objfile = objfile; | |
521 | ||
522 | /* Put the separate debug object before the normal one, this is so that | |
0df8b418 | 523 | usage of the ALL_OBJFILES_SAFE macro will stay safe. */ |
15d123c9 TG |
524 | put_objfile_before (objfile, parent); |
525 | } | |
526 | ||
527 | /* Free all separate debug objfile of OBJFILE, but don't free OBJFILE | |
528 | itself. */ | |
529 | ||
530 | void | |
531 | free_objfile_separate_debug (struct objfile *objfile) | |
532 | { | |
533 | struct objfile *child; | |
534 | ||
535 | for (child = objfile->separate_debug_objfile; child;) | |
536 | { | |
537 | struct objfile *next_child = child->separate_debug_objfile_link; | |
538 | free_objfile (child); | |
539 | child = next_child; | |
540 | } | |
541 | } | |
c906108c SS |
542 | |
543 | /* Destroy an objfile and all the symtabs and psymtabs under it. Note | |
4a146b47 EZ |
544 | that as much as possible is allocated on the objfile_obstack |
545 | so that the memory can be efficiently freed. | |
c906108c SS |
546 | |
547 | Things which we do NOT free because they are not in malloc'd memory | |
548 | or not in memory specific to the objfile include: | |
549 | ||
c5aa993b | 550 | objfile -> sf |
c906108c SS |
551 | |
552 | FIXME: If the objfile is using reusable symbol information (via mmalloc), | |
553 | then we need to take into account the fact that more than one process | |
554 | may be using the symbol information at the same time (when mmalloc is | |
555 | extended to support cooperative locking). When more than one process | |
556 | is using the mapped symbol info, we need to be more careful about when | |
0df8b418 | 557 | we free objects in the reusable area. */ |
c906108c SS |
558 | |
559 | void | |
fba45db2 | 560 | free_objfile (struct objfile *objfile) |
c906108c | 561 | { |
63644780 NB |
562 | /* First notify observers that this objfile is about to be freed. */ |
563 | observer_notify_free_objfile (objfile); | |
564 | ||
15d123c9 TG |
565 | /* Free all separate debug objfiles. */ |
566 | free_objfile_separate_debug (objfile); | |
567 | ||
5b5d99cf JB |
568 | if (objfile->separate_debug_objfile_backlink) |
569 | { | |
570 | /* We freed the separate debug file, make sure the base objfile | |
571 | doesn't reference it. */ | |
15d123c9 TG |
572 | struct objfile *child; |
573 | ||
574 | child = objfile->separate_debug_objfile_backlink->separate_debug_objfile; | |
575 | ||
576 | if (child == objfile) | |
577 | { | |
578 | /* OBJFILE is the first child. */ | |
579 | objfile->separate_debug_objfile_backlink->separate_debug_objfile = | |
580 | objfile->separate_debug_objfile_link; | |
581 | } | |
582 | else | |
583 | { | |
584 | /* Find OBJFILE in the list. */ | |
585 | while (1) | |
586 | { | |
587 | if (child->separate_debug_objfile_link == objfile) | |
588 | { | |
589 | child->separate_debug_objfile_link = | |
590 | objfile->separate_debug_objfile_link; | |
591 | break; | |
592 | } | |
593 | child = child->separate_debug_objfile_link; | |
594 | gdb_assert (child); | |
595 | } | |
596 | } | |
5b5d99cf JB |
597 | } |
598 | ||
ae5a43e0 DJ |
599 | /* Remove any references to this objfile in the global value |
600 | lists. */ | |
601 | preserve_values (objfile); | |
602 | ||
9f743ef6 JK |
603 | /* It still may reference data modules have associated with the objfile and |
604 | the symbol file data. */ | |
605 | forget_cached_source_info_for_objfile (objfile); | |
606 | ||
2f202fde | 607 | breakpoint_free_objfile (objfile); |
afedecd3 | 608 | btrace_free_objfile (objfile); |
2f202fde | 609 | |
c906108c SS |
610 | /* First do any symbol file specific actions required when we are |
611 | finished with a particular symbol file. Note that if the objfile | |
612 | is using reusable symbol information (via mmalloc) then each of | |
613 | these routines is responsible for doing the correct thing, either | |
614 | freeing things which are valid only during this particular gdb | |
0df8b418 | 615 | execution, or leaving them to be reused during the next one. */ |
c906108c | 616 | |
c5aa993b | 617 | if (objfile->sf != NULL) |
c906108c | 618 | { |
c5aa993b | 619 | (*objfile->sf->sym_finish) (objfile); |
c906108c SS |
620 | } |
621 | ||
9f743ef6 JK |
622 | /* Discard any data modules have associated with the objfile. The function |
623 | still may reference objfile->obfd. */ | |
c5bc3a77 DJ |
624 | objfile_free_data (objfile); |
625 | ||
706e3705 TT |
626 | if (objfile->obfd) |
627 | gdb_bfd_unref (objfile->obfd); | |
628 | else | |
629 | free_objfile_per_bfd_storage (objfile->per_bfd); | |
c906108c | 630 | |
0df8b418 | 631 | /* Remove it from the chain of all objfiles. */ |
c906108c SS |
632 | |
633 | unlink_objfile (objfile); | |
634 | ||
adb7f338 JK |
635 | if (objfile == symfile_objfile) |
636 | symfile_objfile = NULL; | |
c906108c | 637 | |
c906108c SS |
638 | /* Before the symbol table code was redone to make it easier to |
639 | selectively load and remove information particular to a specific | |
640 | linkage unit, gdb used to do these things whenever the monolithic | |
641 | symbol table was blown away. How much still needs to be done | |
642 | is unknown, but we play it safe for now and keep each action until | |
0df8b418 | 643 | it is shown to be no longer needed. */ |
c5aa993b | 644 | |
cb5d864f FF |
645 | /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
646 | for example), so we need to call this here. */ | |
c906108c SS |
647 | clear_pc_function_cache (); |
648 | ||
9bdcbae7 DJ |
649 | /* Clear globals which might have pointed into a removed objfile. |
650 | FIXME: It's not clear which of these are supposed to persist | |
651 | between expressions and which ought to be reset each time. */ | |
652 | expression_context_block = NULL; | |
653 | innermost_block = NULL; | |
654 | ||
cb5d864f | 655 | /* Check to see if the current_source_symtab belongs to this objfile, |
0df8b418 | 656 | and if so, call clear_current_source_symtab_and_line. */ |
cb5d864f FF |
657 | |
658 | { | |
659 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
cb5d864f | 660 | |
00174a86 TT |
661 | if (cursal.symtab && cursal.symtab->objfile == objfile) |
662 | clear_current_source_symtab_and_line (); | |
cb5d864f FF |
663 | } |
664 | ||
78a4a9b9 | 665 | if (objfile->global_psymbols.list) |
2dc74dc1 | 666 | xfree (objfile->global_psymbols.list); |
78a4a9b9 | 667 | if (objfile->static_psymbols.list) |
2dc74dc1 | 668 | xfree (objfile->static_psymbols.list); |
0df8b418 | 669 | /* Free the obstacks for non-reusable objfiles. */ |
710e1a31 | 670 | psymbol_bcache_free (objfile->psymbol_cache); |
b99607ea | 671 | obstack_free (&objfile->objfile_obstack, 0); |
6c95b8df PA |
672 | |
673 | /* Rebuild section map next time we need it. */ | |
607ece04 | 674 | get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1; |
6c95b8df | 675 | |
020f7036 | 676 | /* The last thing we do is free the objfile struct itself. */ |
2dc74dc1 | 677 | xfree (objfile); |
c906108c SS |
678 | } |
679 | ||
74b7792f AC |
680 | static void |
681 | do_free_objfile_cleanup (void *obj) | |
682 | { | |
683 | free_objfile (obj); | |
684 | } | |
685 | ||
686 | struct cleanup * | |
687 | make_cleanup_free_objfile (struct objfile *obj) | |
688 | { | |
689 | return make_cleanup (do_free_objfile_cleanup, obj); | |
690 | } | |
c906108c SS |
691 | |
692 | /* Free all the object files at once and clean up their users. */ | |
693 | ||
694 | void | |
fba45db2 | 695 | free_all_objfiles (void) |
c906108c SS |
696 | { |
697 | struct objfile *objfile, *temp; | |
0133421a JK |
698 | struct so_list *so; |
699 | ||
700 | /* Any objfile referencewould become stale. */ | |
701 | for (so = master_so_list (); so; so = so->next) | |
702 | gdb_assert (so->objfile == NULL); | |
c906108c SS |
703 | |
704 | ALL_OBJFILES_SAFE (objfile, temp) | |
c5aa993b JM |
705 | { |
706 | free_objfile (objfile); | |
707 | } | |
c1e56572 | 708 | clear_symtab_users (0); |
c906108c SS |
709 | } |
710 | \f | |
34eaf542 TT |
711 | /* A helper function for objfile_relocate1 that relocates a single |
712 | symbol. */ | |
713 | ||
714 | static void | |
715 | relocate_one_symbol (struct symbol *sym, struct objfile *objfile, | |
716 | struct section_offsets *delta) | |
717 | { | |
718 | fixup_symbol_section (sym, objfile); | |
719 | ||
720 | /* The RS6000 code from which this was taken skipped | |
721 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. | |
722 | But I'm leaving out that test, on the theory that | |
723 | they can't possibly pass the tests below. */ | |
724 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
725 | || SYMBOL_CLASS (sym) == LOC_STATIC) | |
726 | && SYMBOL_SECTION (sym) >= 0) | |
727 | { | |
728 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
729 | } | |
730 | } | |
731 | ||
c906108c | 732 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS |
b260e109 JK |
733 | entries in new_offsets. SEPARATE_DEBUG_OBJFILE is not touched here. |
734 | Return non-zero iff any change happened. */ | |
567995e1 | 735 | |
b260e109 | 736 | static int |
5cc80db3 | 737 | objfile_relocate1 (struct objfile *objfile, |
3189cb12 | 738 | const struct section_offsets *new_offsets) |
c906108c | 739 | { |
30510692 | 740 | struct obj_section *s; |
d4f3574e | 741 | struct section_offsets *delta = |
a39a16c4 MM |
742 | ((struct section_offsets *) |
743 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
c906108c | 744 | |
5cc80db3 MS |
745 | int i; |
746 | int something_changed = 0; | |
747 | ||
748 | for (i = 0; i < objfile->num_sections; ++i) | |
749 | { | |
750 | delta->offsets[i] = | |
751 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); | |
752 | if (ANOFFSET (delta, i) != 0) | |
753 | something_changed = 1; | |
754 | } | |
755 | if (!something_changed) | |
756 | return 0; | |
c906108c SS |
757 | |
758 | /* OK, get all the symtabs. */ | |
759 | { | |
760 | struct symtab *s; | |
761 | ||
762 | ALL_OBJFILE_SYMTABS (objfile, s) | |
c5aa993b JM |
763 | { |
764 | struct linetable *l; | |
765 | struct blockvector *bv; | |
766 | int i; | |
767 | ||
768 | /* First the line table. */ | |
769 | l = LINETABLE (s); | |
770 | if (l) | |
771 | { | |
772 | for (i = 0; i < l->nitems; ++i) | |
773 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
774 | } | |
c906108c | 775 | |
c5aa993b JM |
776 | /* Don't relocate a shared blockvector more than once. */ |
777 | if (!s->primary) | |
778 | continue; | |
c906108c | 779 | |
c5aa993b | 780 | bv = BLOCKVECTOR (s); |
b101f7a1 UW |
781 | if (BLOCKVECTOR_MAP (bv)) |
782 | addrmap_relocate (BLOCKVECTOR_MAP (bv), | |
783 | ANOFFSET (delta, s->block_line_section)); | |
784 | ||
c5aa993b JM |
785 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) |
786 | { | |
787 | struct block *b; | |
e88c90f2 | 788 | struct symbol *sym; |
de4f826b | 789 | struct dict_iterator iter; |
c5aa993b JM |
790 | |
791 | b = BLOCKVECTOR_BLOCK (bv, i); | |
792 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
793 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); | |
794 | ||
8157b174 TT |
795 | /* We only want to iterate over the local symbols, not any |
796 | symbols in included symtabs. */ | |
797 | ALL_DICT_SYMBOLS (BLOCK_DICT (b), iter, sym) | |
c5aa993b | 798 | { |
34eaf542 | 799 | relocate_one_symbol (sym, objfile, delta); |
c5aa993b JM |
800 | } |
801 | } | |
802 | } | |
c906108c SS |
803 | } |
804 | ||
34eaf542 TT |
805 | /* Relocate isolated symbols. */ |
806 | { | |
807 | struct symbol *iter; | |
808 | ||
809 | for (iter = objfile->template_symbols; iter; iter = iter->hash_next) | |
810 | relocate_one_symbol (iter, objfile, delta); | |
811 | } | |
812 | ||
9b14d7aa JK |
813 | if (objfile->psymtabs_addrmap) |
814 | addrmap_relocate (objfile->psymtabs_addrmap, | |
815 | ANOFFSET (delta, SECT_OFF_TEXT (objfile))); | |
816 | ||
ccefe4c4 TT |
817 | if (objfile->sf) |
818 | objfile->sf->qf->relocate (objfile, new_offsets, delta); | |
c906108c SS |
819 | |
820 | { | |
821 | struct minimal_symbol *msym; | |
5cc80db3 | 822 | |
c906108c SS |
823 | ALL_OBJFILE_MSYMBOLS (objfile, msym) |
824 | if (SYMBOL_SECTION (msym) >= 0) | |
c5aa993b | 825 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); |
c906108c SS |
826 | } |
827 | /* Relocating different sections by different amounts may cause the symbols | |
828 | to be out of order. */ | |
829 | msymbols_sort (objfile); | |
830 | ||
abd0a5fa | 831 | if (objfile->ei.entry_point_p) |
36b0c0e0 PS |
832 | { |
833 | /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT | |
834 | only as a fallback. */ | |
835 | struct obj_section *s; | |
836 | s = find_pc_section (objfile->ei.entry_point); | |
837 | if (s) | |
65cf3563 TT |
838 | { |
839 | int idx = gdb_bfd_section_index (objfile->obfd, s->the_bfd_section); | |
840 | ||
841 | objfile->ei.entry_point += ANOFFSET (delta, idx); | |
842 | } | |
36b0c0e0 PS |
843 | else |
844 | objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
845 | } | |
846 | ||
f1f2b5f4 PA |
847 | { |
848 | int i; | |
5cc80db3 | 849 | |
f1f2b5f4 PA |
850 | for (i = 0; i < objfile->num_sections; ++i) |
851 | (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); | |
852 | } | |
853 | ||
854 | /* Rebuild section map next time we need it. */ | |
607ece04 | 855 | get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1; |
f1f2b5f4 | 856 | |
30510692 DJ |
857 | /* Update the table in exec_ops, used to read memory. */ |
858 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
859 | { | |
65cf3563 | 860 | int idx = s - objfile->sections; |
30510692 DJ |
861 | |
862 | exec_set_section_address (bfd_get_filename (objfile->obfd), idx, | |
f1f6aadf | 863 | obj_section_addr (s)); |
30510692 | 864 | } |
b260e109 | 865 | |
55aa24fb SDJ |
866 | /* Relocating probes. */ |
867 | if (objfile->sf && objfile->sf->sym_probe_fns) | |
868 | objfile->sf->sym_probe_fns->sym_relocate_probe (objfile, | |
869 | new_offsets, delta); | |
870 | ||
b260e109 JK |
871 | /* Data changed. */ |
872 | return 1; | |
567995e1 JK |
873 | } |
874 | ||
875 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
876 | entries in new_offsets. Process also OBJFILE's SEPARATE_DEBUG_OBJFILEs. | |
877 | ||
878 | The number and ordering of sections does differ between the two objfiles. | |
879 | Only their names match. Also the file offsets will differ (objfile being | |
880 | possibly prelinked but separate_debug_objfile is probably not prelinked) but | |
881 | the in-memory absolute address as specified by NEW_OFFSETS must match both | |
882 | files. */ | |
883 | ||
884 | void | |
3189cb12 DE |
885 | objfile_relocate (struct objfile *objfile, |
886 | const struct section_offsets *new_offsets) | |
567995e1 JK |
887 | { |
888 | struct objfile *debug_objfile; | |
b260e109 | 889 | int changed = 0; |
567995e1 | 890 | |
b260e109 | 891 | changed |= objfile_relocate1 (objfile, new_offsets); |
567995e1 JK |
892 | |
893 | for (debug_objfile = objfile->separate_debug_objfile; | |
894 | debug_objfile; | |
895 | debug_objfile = objfile_separate_debug_iterate (objfile, debug_objfile)) | |
896 | { | |
897 | struct section_addr_info *objfile_addrs; | |
898 | struct section_offsets *new_debug_offsets; | |
567995e1 JK |
899 | struct cleanup *my_cleanups; |
900 | ||
901 | objfile_addrs = build_section_addr_info_from_objfile (objfile); | |
902 | my_cleanups = make_cleanup (xfree, objfile_addrs); | |
903 | ||
904 | /* Here OBJFILE_ADDRS contain the correct absolute addresses, the | |
905 | relative ones must be already created according to debug_objfile. */ | |
906 | ||
907 | addr_info_make_relative (objfile_addrs, debug_objfile->obfd); | |
908 | ||
909 | gdb_assert (debug_objfile->num_sections | |
d445b2f6 | 910 | == gdb_bfd_count_sections (debug_objfile->obfd)); |
4fc06681 MS |
911 | new_debug_offsets = |
912 | xmalloc (SIZEOF_N_SECTION_OFFSETS (debug_objfile->num_sections)); | |
567995e1 JK |
913 | make_cleanup (xfree, new_debug_offsets); |
914 | relative_addr_info_to_section_offsets (new_debug_offsets, | |
915 | debug_objfile->num_sections, | |
916 | objfile_addrs); | |
917 | ||
b260e109 | 918 | changed |= objfile_relocate1 (debug_objfile, new_debug_offsets); |
567995e1 JK |
919 | |
920 | do_cleanups (my_cleanups); | |
921 | } | |
30510692 | 922 | |
0df8b418 | 923 | /* Relocate breakpoints as necessary, after things are relocated. */ |
b260e109 JK |
924 | if (changed) |
925 | breakpoint_re_set (); | |
c906108c | 926 | } |
4141a416 JB |
927 | |
928 | /* Rebase (add to the offsets) OBJFILE by SLIDE. SEPARATE_DEBUG_OBJFILE is | |
929 | not touched here. | |
930 | Return non-zero iff any change happened. */ | |
931 | ||
932 | static int | |
933 | objfile_rebase1 (struct objfile *objfile, CORE_ADDR slide) | |
934 | { | |
935 | struct section_offsets *new_offsets = | |
936 | ((struct section_offsets *) | |
937 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
938 | int i; | |
939 | ||
940 | for (i = 0; i < objfile->num_sections; ++i) | |
941 | new_offsets->offsets[i] = slide; | |
942 | ||
943 | return objfile_relocate1 (objfile, new_offsets); | |
944 | } | |
945 | ||
946 | /* Rebase (add to the offsets) OBJFILE by SLIDE. Process also OBJFILE's | |
947 | SEPARATE_DEBUG_OBJFILEs. */ | |
948 | ||
949 | void | |
950 | objfile_rebase (struct objfile *objfile, CORE_ADDR slide) | |
951 | { | |
952 | struct objfile *debug_objfile; | |
953 | int changed = 0; | |
954 | ||
955 | changed |= objfile_rebase1 (objfile, slide); | |
956 | ||
957 | for (debug_objfile = objfile->separate_debug_objfile; | |
958 | debug_objfile; | |
959 | debug_objfile = objfile_separate_debug_iterate (objfile, debug_objfile)) | |
960 | changed |= objfile_rebase1 (debug_objfile, slide); | |
961 | ||
962 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
963 | if (changed) | |
964 | breakpoint_re_set (); | |
965 | } | |
c906108c | 966 | \f |
55333a84 DE |
967 | /* Return non-zero if OBJFILE has partial symbols. */ |
968 | ||
969 | int | |
970 | objfile_has_partial_symbols (struct objfile *objfile) | |
971 | { | |
b11896a5 TT |
972 | if (!objfile->sf) |
973 | return 0; | |
3e03848b JK |
974 | |
975 | /* If we have not read psymbols, but we have a function capable of reading | |
976 | them, then that is an indication that they are in fact available. Without | |
977 | this function the symbols may have been already read in but they also may | |
978 | not be present in this objfile. */ | |
979 | if ((objfile->flags & OBJF_PSYMTABS_READ) == 0 | |
980 | && objfile->sf->sym_read_psymbols != NULL) | |
981 | return 1; | |
982 | ||
b11896a5 | 983 | return objfile->sf->qf->has_symbols (objfile); |
55333a84 DE |
984 | } |
985 | ||
986 | /* Return non-zero if OBJFILE has full symbols. */ | |
987 | ||
988 | int | |
989 | objfile_has_full_symbols (struct objfile *objfile) | |
990 | { | |
991 | return objfile->symtabs != NULL; | |
992 | } | |
993 | ||
e361b228 | 994 | /* Return non-zero if OBJFILE has full or partial symbols, either directly |
15d123c9 | 995 | or through a separate debug file. */ |
e361b228 TG |
996 | |
997 | int | |
998 | objfile_has_symbols (struct objfile *objfile) | |
999 | { | |
15d123c9 | 1000 | struct objfile *o; |
e361b228 | 1001 | |
15d123c9 TG |
1002 | for (o = objfile; o; o = objfile_separate_debug_iterate (objfile, o)) |
1003 | if (objfile_has_partial_symbols (o) || objfile_has_full_symbols (o)) | |
1004 | return 1; | |
e361b228 TG |
1005 | return 0; |
1006 | } | |
1007 | ||
1008 | ||
c906108c SS |
1009 | /* Many places in gdb want to test just to see if we have any partial |
1010 | symbols available. This function returns zero if none are currently | |
0df8b418 | 1011 | available, nonzero otherwise. */ |
c906108c SS |
1012 | |
1013 | int | |
fba45db2 | 1014 | have_partial_symbols (void) |
c906108c SS |
1015 | { |
1016 | struct objfile *ofp; | |
1017 | ||
1018 | ALL_OBJFILES (ofp) | |
c5aa993b | 1019 | { |
55333a84 DE |
1020 | if (objfile_has_partial_symbols (ofp)) |
1021 | return 1; | |
c5aa993b | 1022 | } |
c906108c SS |
1023 | return 0; |
1024 | } | |
1025 | ||
1026 | /* Many places in gdb want to test just to see if we have any full | |
1027 | symbols available. This function returns zero if none are currently | |
0df8b418 | 1028 | available, nonzero otherwise. */ |
c906108c SS |
1029 | |
1030 | int | |
fba45db2 | 1031 | have_full_symbols (void) |
c906108c SS |
1032 | { |
1033 | struct objfile *ofp; | |
1034 | ||
1035 | ALL_OBJFILES (ofp) | |
c5aa993b | 1036 | { |
55333a84 DE |
1037 | if (objfile_has_full_symbols (ofp)) |
1038 | return 1; | |
c5aa993b | 1039 | } |
c906108c SS |
1040 | return 0; |
1041 | } | |
1042 | ||
1043 | ||
1044 | /* This operations deletes all objfile entries that represent solibs that | |
1045 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
0df8b418 MS |
1046 | command. */ |
1047 | ||
c906108c | 1048 | void |
fba45db2 | 1049 | objfile_purge_solibs (void) |
c906108c | 1050 | { |
c5aa993b JM |
1051 | struct objfile *objf; |
1052 | struct objfile *temp; | |
c906108c SS |
1053 | |
1054 | ALL_OBJFILES_SAFE (objf, temp) | |
1055 | { | |
1056 | /* We assume that the solib package has been purged already, or will | |
0df8b418 MS |
1057 | be soon. */ |
1058 | ||
2df3850c | 1059 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
c906108c SS |
1060 | free_objfile (objf); |
1061 | } | |
1062 | } | |
1063 | ||
1064 | ||
1065 | /* Many places in gdb want to test just to see if we have any minimal | |
1066 | symbols available. This function returns zero if none are currently | |
0df8b418 | 1067 | available, nonzero otherwise. */ |
c906108c SS |
1068 | |
1069 | int | |
fba45db2 | 1070 | have_minimal_symbols (void) |
c906108c SS |
1071 | { |
1072 | struct objfile *ofp; | |
1073 | ||
1074 | ALL_OBJFILES (ofp) | |
c5aa993b | 1075 | { |
15831452 | 1076 | if (ofp->minimal_symbol_count > 0) |
c5aa993b JM |
1077 | { |
1078 | return 1; | |
1079 | } | |
1080 | } | |
c906108c SS |
1081 | return 0; |
1082 | } | |
1083 | ||
a845f5cb PP |
1084 | /* Qsort comparison function. */ |
1085 | ||
1086 | static int | |
1087 | qsort_cmp (const void *a, const void *b) | |
1088 | { | |
1089 | const struct obj_section *sect1 = *(const struct obj_section **) a; | |
1090 | const struct obj_section *sect2 = *(const struct obj_section **) b; | |
1091 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1092 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1093 | ||
1094 | if (sect1_addr < sect2_addr) | |
6fbf07cd | 1095 | return -1; |
a845f5cb | 1096 | else if (sect1_addr > sect2_addr) |
6fbf07cd PP |
1097 | return 1; |
1098 | else | |
5cc80db3 MS |
1099 | { |
1100 | /* Sections are at the same address. This could happen if | |
1101 | A) we have an objfile and a separate debuginfo. | |
1102 | B) we are confused, and have added sections without proper relocation, | |
0df8b418 | 1103 | or something like that. */ |
5cc80db3 MS |
1104 | |
1105 | const struct objfile *const objfile1 = sect1->objfile; | |
1106 | const struct objfile *const objfile2 = sect2->objfile; | |
1107 | ||
1108 | if (objfile1->separate_debug_objfile == objfile2 | |
1109 | || objfile2->separate_debug_objfile == objfile1) | |
1110 | { | |
1111 | /* Case A. The ordering doesn't matter: separate debuginfo files | |
1112 | will be filtered out later. */ | |
1113 | ||
1114 | return 0; | |
1115 | } | |
1116 | ||
1117 | /* Case B. Maintain stable sort order, so bugs in GDB are easier to | |
1118 | triage. This section could be slow (since we iterate over all | |
1119 | objfiles in each call to qsort_cmp), but this shouldn't happen | |
1120 | very often (GDB is already in a confused state; one hopes this | |
1121 | doesn't happen at all). If you discover that significant time is | |
1122 | spent in the loops below, do 'set complaints 100' and examine the | |
1123 | resulting complaints. */ | |
1124 | ||
1125 | if (objfile1 == objfile2) | |
1126 | { | |
1127 | /* Both sections came from the same objfile. We are really confused. | |
1128 | Sort on sequence order of sections within the objfile. */ | |
1129 | ||
1130 | const struct obj_section *osect; | |
1131 | ||
1132 | ALL_OBJFILE_OSECTIONS (objfile1, osect) | |
1133 | if (osect == sect1) | |
1134 | return -1; | |
1135 | else if (osect == sect2) | |
1136 | return 1; | |
1137 | ||
1138 | /* We should have found one of the sections before getting here. */ | |
f3574227 | 1139 | gdb_assert_not_reached ("section not found"); |
5cc80db3 MS |
1140 | } |
1141 | else | |
1142 | { | |
1143 | /* Sort on sequence number of the objfile in the chain. */ | |
1144 | ||
1145 | const struct objfile *objfile; | |
1146 | ||
1147 | ALL_OBJFILES (objfile) | |
1148 | if (objfile == objfile1) | |
1149 | return -1; | |
1150 | else if (objfile == objfile2) | |
1151 | return 1; | |
1152 | ||
1153 | /* We should have found one of the objfiles before getting here. */ | |
f3574227 | 1154 | gdb_assert_not_reached ("objfile not found"); |
5cc80db3 MS |
1155 | } |
1156 | } | |
6fbf07cd PP |
1157 | |
1158 | /* Unreachable. */ | |
f3574227 | 1159 | gdb_assert_not_reached ("unexpected code path"); |
a845f5cb PP |
1160 | return 0; |
1161 | } | |
1162 | ||
3aad21cf PP |
1163 | /* Select "better" obj_section to keep. We prefer the one that came from |
1164 | the real object, rather than the one from separate debuginfo. | |
1165 | Most of the time the two sections are exactly identical, but with | |
1166 | prelinking the .rel.dyn section in the real object may have different | |
1167 | size. */ | |
1168 | ||
1169 | static struct obj_section * | |
1170 | preferred_obj_section (struct obj_section *a, struct obj_section *b) | |
1171 | { | |
1172 | gdb_assert (obj_section_addr (a) == obj_section_addr (b)); | |
1173 | gdb_assert ((a->objfile->separate_debug_objfile == b->objfile) | |
1174 | || (b->objfile->separate_debug_objfile == a->objfile)); | |
1175 | gdb_assert ((a->objfile->separate_debug_objfile_backlink == b->objfile) | |
1176 | || (b->objfile->separate_debug_objfile_backlink == a->objfile)); | |
1177 | ||
1178 | if (a->objfile->separate_debug_objfile != NULL) | |
1179 | return a; | |
1180 | return b; | |
1181 | } | |
1182 | ||
6fbf07cd PP |
1183 | /* Return 1 if SECTION should be inserted into the section map. |
1184 | We want to insert only non-overlay and non-TLS section. */ | |
1185 | ||
1186 | static int | |
1187 | insert_section_p (const struct bfd *abfd, | |
1188 | const struct bfd_section *section) | |
1189 | { | |
1190 | const bfd_vma lma = bfd_section_lma (abfd, section); | |
1191 | ||
50f8ea94 | 1192 | if (overlay_debugging && lma != 0 && lma != bfd_section_vma (abfd, section) |
6fbf07cd PP |
1193 | && (bfd_get_file_flags (abfd) & BFD_IN_MEMORY) == 0) |
1194 | /* This is an overlay section. IN_MEMORY check is needed to avoid | |
1195 | discarding sections from the "system supplied DSO" (aka vdso) | |
1196 | on some Linux systems (e.g. Fedora 11). */ | |
1197 | return 0; | |
1198 | if ((bfd_get_section_flags (abfd, section) & SEC_THREAD_LOCAL) != 0) | |
1199 | /* This is a TLS section. */ | |
1200 | return 0; | |
1201 | ||
1202 | return 1; | |
1203 | } | |
1204 | ||
1205 | /* Filter out overlapping sections where one section came from the real | |
1206 | objfile, and the other from a separate debuginfo file. | |
1207 | Return the size of table after redundant sections have been eliminated. */ | |
1208 | ||
1209 | static int | |
1210 | filter_debuginfo_sections (struct obj_section **map, int map_size) | |
1211 | { | |
1212 | int i, j; | |
1213 | ||
1214 | for (i = 0, j = 0; i < map_size - 1; i++) | |
1215 | { | |
1216 | struct obj_section *const sect1 = map[i]; | |
1217 | struct obj_section *const sect2 = map[i + 1]; | |
1218 | const struct objfile *const objfile1 = sect1->objfile; | |
1219 | const struct objfile *const objfile2 = sect2->objfile; | |
1220 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1221 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1222 | ||
1223 | if (sect1_addr == sect2_addr | |
1224 | && (objfile1->separate_debug_objfile == objfile2 | |
1225 | || objfile2->separate_debug_objfile == objfile1)) | |
1226 | { | |
1227 | map[j++] = preferred_obj_section (sect1, sect2); | |
1228 | ++i; | |
1229 | } | |
1230 | else | |
1231 | map[j++] = sect1; | |
1232 | } | |
1233 | ||
1234 | if (i < map_size) | |
1235 | { | |
1236 | gdb_assert (i == map_size - 1); | |
1237 | map[j++] = map[i]; | |
1238 | } | |
1239 | ||
1240 | /* The map should not have shrunk to less than half the original size. */ | |
1241 | gdb_assert (map_size / 2 <= j); | |
1242 | ||
1243 | return j; | |
1244 | } | |
1245 | ||
1246 | /* Filter out overlapping sections, issuing a warning if any are found. | |
1247 | Overlapping sections could really be overlay sections which we didn't | |
1248 | classify as such in insert_section_p, or we could be dealing with a | |
1249 | corrupt binary. */ | |
1250 | ||
1251 | static int | |
1252 | filter_overlapping_sections (struct obj_section **map, int map_size) | |
1253 | { | |
1254 | int i, j; | |
1255 | ||
1256 | for (i = 0, j = 0; i < map_size - 1; ) | |
1257 | { | |
1258 | int k; | |
1259 | ||
1260 | map[j++] = map[i]; | |
1261 | for (k = i + 1; k < map_size; k++) | |
1262 | { | |
1263 | struct obj_section *const sect1 = map[i]; | |
1264 | struct obj_section *const sect2 = map[k]; | |
1265 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1266 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1267 | const CORE_ADDR sect1_endaddr = obj_section_endaddr (sect1); | |
1268 | ||
1269 | gdb_assert (sect1_addr <= sect2_addr); | |
1270 | ||
1271 | if (sect1_endaddr <= sect2_addr) | |
1272 | break; | |
1273 | else | |
1274 | { | |
1275 | /* We have an overlap. Report it. */ | |
1276 | ||
1277 | struct objfile *const objf1 = sect1->objfile; | |
1278 | struct objfile *const objf2 = sect2->objfile; | |
1279 | ||
6fbf07cd PP |
1280 | const struct bfd_section *const bfds1 = sect1->the_bfd_section; |
1281 | const struct bfd_section *const bfds2 = sect2->the_bfd_section; | |
1282 | ||
1283 | const CORE_ADDR sect2_endaddr = obj_section_endaddr (sect2); | |
1284 | ||
1285 | struct gdbarch *const gdbarch = get_objfile_arch (objf1); | |
1286 | ||
1287 | complaint (&symfile_complaints, | |
1288 | _("unexpected overlap between:\n" | |
1289 | " (A) section `%s' from `%s' [%s, %s)\n" | |
1290 | " (B) section `%s' from `%s' [%s, %s).\n" | |
1291 | "Will ignore section B"), | |
4262abfb | 1292 | bfd_section_name (abfd1, bfds1), objfile_name (objf1), |
6fbf07cd PP |
1293 | paddress (gdbarch, sect1_addr), |
1294 | paddress (gdbarch, sect1_endaddr), | |
4262abfb | 1295 | bfd_section_name (abfd2, bfds2), objfile_name (objf2), |
6fbf07cd PP |
1296 | paddress (gdbarch, sect2_addr), |
1297 | paddress (gdbarch, sect2_endaddr)); | |
1298 | } | |
1299 | } | |
1300 | i = k; | |
1301 | } | |
1302 | ||
1303 | if (i < map_size) | |
1304 | { | |
1305 | gdb_assert (i == map_size - 1); | |
1306 | map[j++] = map[i]; | |
1307 | } | |
1308 | ||
1309 | return j; | |
1310 | } | |
1311 | ||
1312 | ||
1313 | /* Update PMAP, PMAP_SIZE with sections from all objfiles, excluding any | |
1314 | TLS, overlay and overlapping sections. */ | |
a845f5cb PP |
1315 | |
1316 | static void | |
6c95b8df PA |
1317 | update_section_map (struct program_space *pspace, |
1318 | struct obj_section ***pmap, int *pmap_size) | |
a845f5cb | 1319 | { |
607ece04 | 1320 | struct objfile_pspace_info *pspace_info; |
6fbf07cd | 1321 | int alloc_size, map_size, i; |
a845f5cb PP |
1322 | struct obj_section *s, **map; |
1323 | struct objfile *objfile; | |
1324 | ||
607ece04 GB |
1325 | pspace_info = get_objfile_pspace_data (pspace); |
1326 | gdb_assert (pspace_info->section_map_dirty != 0 | |
1327 | || pspace_info->new_objfiles_available != 0); | |
a845f5cb PP |
1328 | |
1329 | map = *pmap; | |
1330 | xfree (map); | |
1331 | ||
6fbf07cd | 1332 | alloc_size = 0; |
6c95b8df PA |
1333 | ALL_PSPACE_OBJFILES (pspace, objfile) |
1334 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
1335 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1336 | alloc_size += 1; | |
a845f5cb | 1337 | |
65a97ab3 PP |
1338 | /* This happens on detach/attach (e.g. in gdb.base/attach.exp). */ |
1339 | if (alloc_size == 0) | |
1340 | { | |
1341 | *pmap = NULL; | |
1342 | *pmap_size = 0; | |
1343 | return; | |
1344 | } | |
1345 | ||
6fbf07cd | 1346 | map = xmalloc (alloc_size * sizeof (*map)); |
a845f5cb | 1347 | |
3aad21cf | 1348 | i = 0; |
6c95b8df PA |
1349 | ALL_PSPACE_OBJFILES (pspace, objfile) |
1350 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
1351 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1352 | map[i++] = s; | |
a845f5cb | 1353 | |
6fbf07cd PP |
1354 | qsort (map, alloc_size, sizeof (*map), qsort_cmp); |
1355 | map_size = filter_debuginfo_sections(map, alloc_size); | |
1356 | map_size = filter_overlapping_sections(map, map_size); | |
a845f5cb | 1357 | |
6fbf07cd PP |
1358 | if (map_size < alloc_size) |
1359 | /* Some sections were eliminated. Trim excess space. */ | |
1360 | map = xrealloc (map, map_size * sizeof (*map)); | |
3aad21cf | 1361 | else |
6fbf07cd | 1362 | gdb_assert (alloc_size == map_size); |
3aad21cf | 1363 | |
a845f5cb PP |
1364 | *pmap = map; |
1365 | *pmap_size = map_size; | |
1366 | } | |
1367 | ||
0df8b418 | 1368 | /* Bsearch comparison function. */ |
a845f5cb PP |
1369 | |
1370 | static int | |
1371 | bsearch_cmp (const void *key, const void *elt) | |
1372 | { | |
1373 | const CORE_ADDR pc = *(CORE_ADDR *) key; | |
1374 | const struct obj_section *section = *(const struct obj_section **) elt; | |
1375 | ||
1376 | if (pc < obj_section_addr (section)) | |
1377 | return -1; | |
1378 | if (pc < obj_section_endaddr (section)) | |
1379 | return 0; | |
1380 | return 1; | |
1381 | } | |
1382 | ||
714835d5 | 1383 | /* Returns a section whose range includes PC or NULL if none found. */ |
c906108c SS |
1384 | |
1385 | struct obj_section * | |
714835d5 | 1386 | find_pc_section (CORE_ADDR pc) |
c906108c | 1387 | { |
6c95b8df | 1388 | struct objfile_pspace_info *pspace_info; |
a845f5cb | 1389 | struct obj_section *s, **sp; |
c5aa993b | 1390 | |
714835d5 UW |
1391 | /* Check for mapped overlay section first. */ |
1392 | s = find_pc_mapped_section (pc); | |
1393 | if (s) | |
1394 | return s; | |
c906108c | 1395 | |
6c95b8df | 1396 | pspace_info = get_objfile_pspace_data (current_program_space); |
607ece04 GB |
1397 | if (pspace_info->section_map_dirty |
1398 | || (pspace_info->new_objfiles_available | |
1399 | && !pspace_info->inhibit_updates)) | |
a845f5cb | 1400 | { |
6c95b8df PA |
1401 | update_section_map (current_program_space, |
1402 | &pspace_info->sections, | |
1403 | &pspace_info->num_sections); | |
c906108c | 1404 | |
6c95b8df PA |
1405 | /* Don't need updates to section map until objfiles are added, |
1406 | removed or relocated. */ | |
607ece04 GB |
1407 | pspace_info->new_objfiles_available = 0; |
1408 | pspace_info->section_map_dirty = 0; | |
a845f5cb PP |
1409 | } |
1410 | ||
65a97ab3 PP |
1411 | /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to |
1412 | bsearch be non-NULL. */ | |
1413 | if (pspace_info->sections == NULL) | |
1414 | { | |
1415 | gdb_assert (pspace_info->num_sections == 0); | |
1416 | return NULL; | |
1417 | } | |
1418 | ||
6c95b8df PA |
1419 | sp = (struct obj_section **) bsearch (&pc, |
1420 | pspace_info->sections, | |
1421 | pspace_info->num_sections, | |
1422 | sizeof (*pspace_info->sections), | |
1423 | bsearch_cmp); | |
a845f5cb PP |
1424 | if (sp != NULL) |
1425 | return *sp; | |
714835d5 | 1426 | return NULL; |
c906108c | 1427 | } |
c5aa993b | 1428 | |
c906108c | 1429 | |
3e5d3a5a | 1430 | /* Return non-zero if PC is in a section called NAME. */ |
c906108c SS |
1431 | |
1432 | int | |
3e5d3a5a | 1433 | pc_in_section (CORE_ADDR pc, char *name) |
c906108c SS |
1434 | { |
1435 | struct obj_section *s; | |
1436 | int retval = 0; | |
c5aa993b JM |
1437 | |
1438 | s = find_pc_section (pc); | |
1439 | ||
c906108c SS |
1440 | retval = (s != NULL |
1441 | && s->the_bfd_section->name != NULL | |
3e5d3a5a | 1442 | && strcmp (s->the_bfd_section->name, name) == 0); |
c5aa993b | 1443 | return (retval); |
c906108c | 1444 | } |
0d0e1a63 MK |
1445 | \f |
1446 | ||
607ece04 | 1447 | /* Set section_map_dirty so section map will be rebuilt next time it |
bb272892 | 1448 | is used. Called by reread_symbols. */ |
a845f5cb PP |
1449 | |
1450 | void | |
bb272892 | 1451 | objfiles_changed (void) |
a845f5cb | 1452 | { |
6c95b8df | 1453 | /* Rebuild section map next time we need it. */ |
607ece04 GB |
1454 | get_objfile_pspace_data (current_program_space)->section_map_dirty = 1; |
1455 | } | |
1456 | ||
1457 | /* See comments in objfiles.h. */ | |
1458 | ||
1459 | void | |
1460 | inhibit_section_map_updates (struct program_space *pspace) | |
1461 | { | |
1462 | get_objfile_pspace_data (pspace)->inhibit_updates = 1; | |
1463 | } | |
1464 | ||
1465 | /* See comments in objfiles.h. */ | |
1466 | ||
1467 | void | |
1468 | resume_section_map_updates (struct program_space *pspace) | |
1469 | { | |
1470 | get_objfile_pspace_data (pspace)->inhibit_updates = 0; | |
1471 | } | |
1472 | ||
1473 | /* See comments in objfiles.h. */ | |
1474 | ||
1475 | void | |
1476 | resume_section_map_updates_cleanup (void *arg) | |
1477 | { | |
1478 | resume_section_map_updates (arg); | |
a845f5cb | 1479 | } |
e3c69974 | 1480 | |
63644780 NB |
1481 | /* Return 1 if ADDR maps into one of the sections of OBJFILE and 0 |
1482 | otherwise. */ | |
1483 | ||
1484 | int | |
1485 | is_addr_in_objfile (CORE_ADDR addr, const struct objfile *objfile) | |
1486 | { | |
1487 | struct obj_section *osect; | |
1488 | ||
1489 | if (objfile == NULL) | |
1490 | return 0; | |
1491 | ||
1492 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
1493 | { | |
1494 | if (section_is_overlay (osect) && !section_is_mapped (osect)) | |
1495 | continue; | |
1496 | ||
1497 | if (obj_section_addr (osect) <= addr | |
1498 | && addr < obj_section_endaddr (osect)) | |
1499 | return 1; | |
1500 | } | |
1501 | return 0; | |
1502 | } | |
1503 | ||
19630284 JB |
1504 | /* The default implementation for the "iterate_over_objfiles_in_search_order" |
1505 | gdbarch method. It is equivalent to use the ALL_OBJFILES macro, | |
1506 | searching the objfiles in the order they are stored internally, | |
1507 | ignoring CURRENT_OBJFILE. | |
1508 | ||
1509 | On most platorms, it should be close enough to doing the best | |
1510 | we can without some knowledge specific to the architecture. */ | |
1511 | ||
1512 | void | |
1513 | default_iterate_over_objfiles_in_search_order | |
1514 | (struct gdbarch *gdbarch, | |
1515 | iterate_over_objfiles_in_search_order_cb_ftype *cb, | |
1516 | void *cb_data, struct objfile *current_objfile) | |
1517 | { | |
1518 | int stop = 0; | |
1519 | struct objfile *objfile; | |
1520 | ||
1521 | ALL_OBJFILES (objfile) | |
1522 | { | |
1523 | stop = cb (objfile, cb_data); | |
1524 | if (stop) | |
1525 | return; | |
1526 | } | |
1527 | } | |
1528 | ||
4262abfb JK |
1529 | /* Return canonical name for OBJFILE. */ |
1530 | ||
1531 | const char * | |
1532 | objfile_name (const struct objfile *objfile) | |
1533 | { | |
24ba069a JK |
1534 | if (objfile->obfd != NULL) |
1535 | return bfd_get_filename (objfile->obfd); | |
1536 | ||
4262abfb JK |
1537 | return objfile->original_name; |
1538 | } | |
1539 | ||
6c95b8df PA |
1540 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
1541 | extern initialize_file_ftype _initialize_objfiles; | |
1542 | ||
1543 | void | |
1544 | _initialize_objfiles (void) | |
1545 | { | |
1546 | objfiles_pspace_data | |
8e260fc0 TT |
1547 | = register_program_space_data_with_cleanup (NULL, |
1548 | objfiles_pspace_data_cleanup); | |
706e3705 TT |
1549 | |
1550 | objfiles_bfd_data = register_bfd_data_with_cleanup (NULL, | |
1551 | objfile_bfd_data_free); | |
6c95b8df | 1552 | } |