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