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" |
7a292a7a | 56 | |
8e260fc0 TT |
57 | /* Keep a registry of per-objfile data-pointers required by other GDB |
58 | modules. */ | |
c906108c | 59 | |
6b81941e | 60 | DEFINE_REGISTRY (objfile, REGISTRY_ACCESS_FIELD) |
0d0e1a63 | 61 | |
c906108c | 62 | /* Externally visible variables that are owned by this module. |
0df8b418 | 63 | See declarations in objfile.h for more info. */ |
c906108c | 64 | |
c906108c SS |
65 | struct objfile *rt_common_objfile; /* For runtime common symbols */ |
66 | ||
6c95b8df PA |
67 | struct objfile_pspace_info |
68 | { | |
69 | int objfiles_changed_p; | |
70 | struct obj_section **sections; | |
71 | int num_sections; | |
72 | }; | |
73 | ||
74 | /* Per-program-space data key. */ | |
75 | static const struct program_space_data *objfiles_pspace_data; | |
76 | ||
77 | static void | |
78 | objfiles_pspace_data_cleanup (struct program_space *pspace, void *arg) | |
79 | { | |
80 | struct objfile_pspace_info *info; | |
81 | ||
82 | info = program_space_data (pspace, objfiles_pspace_data); | |
83 | if (info != NULL) | |
84 | { | |
85 | xfree (info->sections); | |
86 | xfree (info); | |
87 | } | |
88 | } | |
89 | ||
90 | /* Get the current svr4 data. If none is found yet, add it now. This | |
91 | function always returns a valid object. */ | |
92 | ||
93 | static struct objfile_pspace_info * | |
94 | get_objfile_pspace_data (struct program_space *pspace) | |
95 | { | |
96 | struct objfile_pspace_info *info; | |
97 | ||
98 | info = program_space_data (pspace, objfiles_pspace_data); | |
99 | if (info == NULL) | |
100 | { | |
101 | info = XZALLOC (struct objfile_pspace_info); | |
102 | set_program_space_data (pspace, objfiles_pspace_data, info); | |
103 | } | |
104 | ||
105 | return info; | |
106 | } | |
107 | ||
706e3705 TT |
108 | \f |
109 | ||
110 | /* Per-BFD data key. */ | |
111 | ||
112 | static const struct bfd_data *objfiles_bfd_data; | |
113 | ||
114 | /* Create the per-BFD storage object for OBJFILE. If ABFD is not | |
115 | NULL, and it already has a per-BFD storage object, use that. | |
116 | Otherwise, allocate a new per-BFD storage object. If ABFD is not | |
117 | NULL, the object is allocated on the BFD; otherwise it is allocated | |
118 | on OBJFILE's obstack. Note that it is not safe to call this | |
119 | multiple times for a given OBJFILE -- it can only be called when | |
120 | allocating or re-initializing OBJFILE. */ | |
121 | ||
122 | static struct objfile_per_bfd_storage * | |
123 | get_objfile_bfd_data (struct objfile *objfile, struct bfd *abfd) | |
124 | { | |
125 | struct objfile_per_bfd_storage *storage = NULL; | |
126 | ||
127 | if (abfd != NULL) | |
128 | storage = bfd_data (abfd, objfiles_bfd_data); | |
129 | ||
130 | if (storage == NULL) | |
131 | { | |
132 | if (abfd != NULL) | |
133 | { | |
134 | storage = bfd_zalloc (abfd, sizeof (struct objfile_per_bfd_storage)); | |
135 | set_bfd_data (abfd, objfiles_bfd_data, storage); | |
136 | } | |
137 | else | |
138 | storage = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
139 | struct objfile_per_bfd_storage); | |
140 | ||
141 | obstack_init (&storage->storage_obstack); | |
142 | storage->filename_cache = bcache_xmalloc (NULL, NULL); | |
6532ff36 | 143 | storage->macro_cache = bcache_xmalloc (NULL, NULL); |
706e3705 TT |
144 | } |
145 | ||
146 | return storage; | |
147 | } | |
148 | ||
149 | /* Free STORAGE. */ | |
150 | ||
151 | static void | |
152 | free_objfile_per_bfd_storage (struct objfile_per_bfd_storage *storage) | |
153 | { | |
154 | bcache_xfree (storage->filename_cache); | |
6532ff36 | 155 | bcache_xfree (storage->macro_cache); |
706e3705 TT |
156 | obstack_free (&storage->storage_obstack, 0); |
157 | } | |
158 | ||
159 | /* A wrapper for free_objfile_per_bfd_storage that can be passed as a | |
160 | cleanup function to the BFD registry. */ | |
161 | ||
162 | static void | |
163 | objfile_bfd_data_free (struct bfd *unused, void *d) | |
164 | { | |
165 | free_objfile_per_bfd_storage (d); | |
166 | } | |
167 | ||
168 | /* See objfiles.h. */ | |
169 | ||
170 | void | |
171 | set_objfile_per_bfd (struct objfile *objfile) | |
172 | { | |
173 | objfile->per_bfd = get_objfile_bfd_data (objfile, objfile->obfd); | |
174 | } | |
175 | ||
176 | \f | |
177 | ||
96baa820 JM |
178 | /* Called via bfd_map_over_sections to build up the section table that |
179 | the objfile references. The objfile contains pointers to the start | |
180 | of the table (objfile->sections) and to the first location after | |
0df8b418 | 181 | the end of the table (objfile->sections_end). */ |
96baa820 | 182 | |
c906108c | 183 | static void |
7be0c536 | 184 | add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect, |
d82ea6a8 | 185 | void *objfilep) |
c906108c | 186 | { |
d82ea6a8 | 187 | struct objfile *objfile = (struct objfile *) objfilep; |
c906108c SS |
188 | struct obj_section section; |
189 | flagword aflag; | |
190 | ||
191 | aflag = bfd_get_section_flags (abfd, asect); | |
ed7c5e43 | 192 | if (!(aflag & SEC_ALLOC)) |
c906108c | 193 | return; |
d82ea6a8 | 194 | if (bfd_section_size (abfd, asect) == 0) |
c906108c | 195 | return; |
d82ea6a8 | 196 | |
c906108c SS |
197 | section.objfile = objfile; |
198 | section.the_bfd_section = asect; | |
199 | section.ovly_mapped = 0; | |
3e43a32a MS |
200 | obstack_grow (&objfile->objfile_obstack, |
201 | (char *) §ion, sizeof (section)); | |
f1f6aadf PA |
202 | objfile->sections_end |
203 | = (struct obj_section *) (((size_t) objfile->sections_end) + 1); | |
c906108c SS |
204 | } |
205 | ||
206 | /* Builds a section table for OBJFILE. | |
96baa820 JM |
207 | |
208 | Note that while we are building the table, which goes into the | |
d82ea6a8 | 209 | objfile obstack, we hijack the sections_end pointer to instead hold |
96baa820 JM |
210 | a count of the number of sections. When bfd_map_over_sections |
211 | returns, this count is used to compute the pointer to the end of | |
212 | the sections table, which then overwrites the count. | |
213 | ||
214 | Also note that the OFFSET and OVLY_MAPPED in each table entry | |
215 | are initialized to zero. | |
216 | ||
d82ea6a8 | 217 | Also note that if anything else writes to the objfile obstack while |
0df8b418 | 218 | we are building the table, we're pretty much hosed. */ |
c906108c | 219 | |
d82ea6a8 | 220 | void |
fba45db2 | 221 | build_objfile_section_table (struct objfile *objfile) |
c906108c | 222 | { |
c906108c | 223 | objfile->sections_end = 0; |
f1f6aadf PA |
224 | bfd_map_over_sections (objfile->obfd, |
225 | add_to_objfile_sections, (void *) objfile); | |
226 | objfile->sections = obstack_finish (&objfile->objfile_obstack); | |
227 | objfile->sections_end = objfile->sections + (size_t) objfile->sections_end; | |
c906108c SS |
228 | } |
229 | ||
2df3850c JM |
230 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits |
231 | allocate a new objfile struct, fill it in as best we can, link it | |
232 | into the list of all known objfiles, and return a pointer to the | |
233 | new objfile struct. | |
c906108c | 234 | |
2df3850c | 235 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
78a4a9b9 | 236 | requests for specific operations. Other bits like OBJF_SHARED are |
0df8b418 | 237 | simply copied through to the new objfile flags member. */ |
c906108c | 238 | |
eb9a305d DC |
239 | /* NOTE: carlton/2003-02-04: This function is called with args NULL, 0 |
240 | by jv-lang.c, to create an artificial objfile used to hold | |
241 | information about dynamically-loaded Java classes. Unfortunately, | |
242 | that branch of this function doesn't get tested very frequently, so | |
243 | it's prone to breakage. (E.g. at one time the name was set to NULL | |
244 | in that situation, which broke a loop over all names in the dynamic | |
245 | library loader.) If you change this function, please try to leave | |
246 | things in a consistent state even if abfd is NULL. */ | |
247 | ||
c906108c | 248 | struct objfile * |
fba45db2 | 249 | allocate_objfile (bfd *abfd, int flags) |
c906108c | 250 | { |
2f6e5d7e | 251 | struct objfile *objfile; |
c906108c | 252 | |
6a0fa043 | 253 | objfile = (struct objfile *) xzalloc (sizeof (struct objfile)); |
710e1a31 | 254 | objfile->psymbol_cache = psymbol_bcache_init (); |
2f6e5d7e TG |
255 | /* We could use obstack_specify_allocation here instead, but |
256 | gdb_obstack.h specifies the alloc/dealloc functions. */ | |
257 | obstack_init (&objfile->objfile_obstack); | |
258 | terminate_minimal_symbol_table (objfile); | |
c906108c | 259 | |
0d0e1a63 MK |
260 | objfile_alloc_data (objfile); |
261 | ||
c906108c SS |
262 | /* Update the per-objfile information that comes from the bfd, ensuring |
263 | that any data that is reference is saved in the per-objfile data | |
8ac244b4 | 264 | region. */ |
c906108c | 265 | |
cbb099e8 | 266 | objfile->obfd = abfd; |
8ac244b4 | 267 | gdb_bfd_ref (abfd); |
c906108c SS |
268 | if (abfd != NULL) |
269 | { | |
5e2b427d UW |
270 | /* Look up the gdbarch associated with the BFD. */ |
271 | objfile->gdbarch = gdbarch_from_bfd (abfd); | |
272 | ||
e1507e95 | 273 | objfile->name = bfd_get_filename (abfd); |
c5aa993b | 274 | objfile->mtime = bfd_get_mtime (abfd); |
c906108c SS |
275 | |
276 | /* Build section table. */ | |
d82ea6a8 | 277 | build_objfile_section_table (objfile); |
c906108c | 278 | } |
eb9a305d DC |
279 | else |
280 | { | |
e1507e95 | 281 | objfile->name = "<<anonymous objfile>>"; |
eb9a305d | 282 | } |
c906108c | 283 | |
706e3705 | 284 | objfile->per_bfd = get_objfile_bfd_data (objfile, abfd); |
6c95b8df PA |
285 | objfile->pspace = current_program_space; |
286 | ||
b8fbeb18 | 287 | /* Initialize the section indexes for this objfile, so that we can |
0df8b418 | 288 | later detect if they are used w/o being properly assigned to. */ |
b8fbeb18 | 289 | |
5c4e30ca DC |
290 | objfile->sect_index_text = -1; |
291 | objfile->sect_index_data = -1; | |
292 | objfile->sect_index_bss = -1; | |
293 | objfile->sect_index_rodata = -1; | |
294 | ||
0df8b418 | 295 | /* Add this file onto the tail of the linked list of other such files. */ |
c906108c | 296 | |
c5aa993b | 297 | objfile->next = NULL; |
c906108c SS |
298 | if (object_files == NULL) |
299 | object_files = objfile; | |
300 | else | |
301 | { | |
2f6e5d7e TG |
302 | struct objfile *last_one; |
303 | ||
c906108c | 304 | for (last_one = object_files; |
c5aa993b JM |
305 | last_one->next; |
306 | last_one = last_one->next); | |
307 | last_one->next = objfile; | |
c906108c SS |
308 | } |
309 | ||
0df8b418 | 310 | /* Save passed in flag bits. */ |
2df3850c | 311 | objfile->flags |= flags; |
c906108c | 312 | |
6c95b8df PA |
313 | /* Rebuild section map next time we need it. */ |
314 | get_objfile_pspace_data (objfile->pspace)->objfiles_changed_p = 1; | |
bb272892 | 315 | |
6c95b8df | 316 | return objfile; |
c906108c SS |
317 | } |
318 | ||
5e2b427d UW |
319 | /* Retrieve the gdbarch associated with OBJFILE. */ |
320 | struct gdbarch * | |
321 | get_objfile_arch (struct objfile *objfile) | |
322 | { | |
323 | return objfile->gdbarch; | |
324 | } | |
325 | ||
abd0a5fa JK |
326 | /* If there is a valid and known entry point, function fills *ENTRY_P with it |
327 | and returns non-zero; otherwise it returns zero. */ | |
9ab9195f | 328 | |
abd0a5fa JK |
329 | int |
330 | entry_point_address_query (CORE_ADDR *entry_p) | |
9ab9195f | 331 | { |
abd0a5fa | 332 | if (symfile_objfile == NULL || !symfile_objfile->ei.entry_point_p) |
3612b192 DJ |
333 | return 0; |
334 | ||
8c2b9656 | 335 | *entry_p = symfile_objfile->ei.entry_point; |
3612b192 | 336 | |
abd0a5fa JK |
337 | return 1; |
338 | } | |
339 | ||
340 | /* Get current entry point address. Call error if it is not known. */ | |
341 | ||
342 | CORE_ADDR | |
343 | entry_point_address (void) | |
344 | { | |
345 | CORE_ADDR retval; | |
346 | ||
347 | if (!entry_point_address_query (&retval)) | |
348 | error (_("Entry point address is not known.")); | |
349 | ||
350 | return retval; | |
9ab9195f | 351 | } |
15831452 | 352 | |
15d123c9 TG |
353 | /* Iterator on PARENT and every separate debug objfile of PARENT. |
354 | The usage pattern is: | |
355 | for (objfile = parent; | |
356 | objfile; | |
357 | objfile = objfile_separate_debug_iterate (parent, objfile)) | |
358 | ... | |
359 | */ | |
360 | ||
361 | struct objfile * | |
362 | objfile_separate_debug_iterate (const struct objfile *parent, | |
363 | const struct objfile *objfile) | |
364 | { | |
365 | struct objfile *res; | |
366 | ||
399f313b | 367 | /* If any, return the first child. */ |
15d123c9 TG |
368 | res = objfile->separate_debug_objfile; |
369 | if (res) | |
370 | return res; | |
371 | ||
15d123c9 TG |
372 | /* Common case where there is no separate debug objfile. */ |
373 | if (objfile == parent) | |
374 | return NULL; | |
375 | ||
399f313b TG |
376 | /* Return the brother if any. Note that we don't iterate on brothers of |
377 | the parents. */ | |
378 | res = objfile->separate_debug_objfile_link; | |
379 | if (res) | |
380 | return res; | |
381 | ||
15d123c9 TG |
382 | for (res = objfile->separate_debug_objfile_backlink; |
383 | res != parent; | |
384 | res = res->separate_debug_objfile_backlink) | |
385 | { | |
386 | gdb_assert (res != NULL); | |
387 | if (res->separate_debug_objfile_link) | |
388 | return res->separate_debug_objfile_link; | |
389 | } | |
390 | return NULL; | |
391 | } | |
15831452 | 392 | |
5b5d99cf JB |
393 | /* Put one object file before a specified on in the global list. |
394 | This can be used to make sure an object file is destroyed before | |
0df8b418 | 395 | another when using ALL_OBJFILES_SAFE to free all objfiles. */ |
5b5d99cf JB |
396 | void |
397 | put_objfile_before (struct objfile *objfile, struct objfile *before_this) | |
398 | { | |
399 | struct objfile **objp; | |
400 | ||
401 | unlink_objfile (objfile); | |
402 | ||
403 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
404 | { | |
405 | if (*objp == before_this) | |
406 | { | |
407 | objfile->next = *objp; | |
408 | *objp = objfile; | |
409 | return; | |
410 | } | |
411 | } | |
412 | ||
413 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 414 | _("put_objfile_before: before objfile not in list")); |
5b5d99cf JB |
415 | } |
416 | ||
c906108c SS |
417 | /* Put OBJFILE at the front of the list. */ |
418 | ||
419 | void | |
fba45db2 | 420 | objfile_to_front (struct objfile *objfile) |
c906108c SS |
421 | { |
422 | struct objfile **objp; | |
423 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
424 | { | |
425 | if (*objp == objfile) | |
426 | { | |
427 | /* Unhook it from where it is. */ | |
428 | *objp = objfile->next; | |
429 | /* Put it in the front. */ | |
430 | objfile->next = object_files; | |
431 | object_files = objfile; | |
432 | break; | |
433 | } | |
434 | } | |
435 | } | |
436 | ||
437 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the | |
438 | list. | |
439 | ||
440 | It is not a bug, or error, to call this function if OBJFILE is not known | |
441 | to be in the current list. This is done in the case of mapped objfiles, | |
442 | for example, just to ensure that the mapped objfile doesn't appear twice | |
443 | in the list. Since the list is threaded, linking in a mapped objfile | |
444 | twice would create a circular list. | |
445 | ||
446 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
447 | unlinking it, just to ensure that we have completely severed any linkages | |
0df8b418 | 448 | between the OBJFILE and the list. */ |
c906108c SS |
449 | |
450 | void | |
fba45db2 | 451 | unlink_objfile (struct objfile *objfile) |
c906108c | 452 | { |
c5aa993b | 453 | struct objfile **objpp; |
c906108c | 454 | |
c5aa993b | 455 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
c906108c | 456 | { |
c5aa993b | 457 | if (*objpp == objfile) |
c906108c | 458 | { |
c5aa993b JM |
459 | *objpp = (*objpp)->next; |
460 | objfile->next = NULL; | |
07cd4b97 | 461 | return; |
c906108c SS |
462 | } |
463 | } | |
07cd4b97 | 464 | |
8e65ff28 | 465 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 466 | _("unlink_objfile: objfile already unlinked")); |
c906108c SS |
467 | } |
468 | ||
15d123c9 TG |
469 | /* Add OBJFILE as a separate debug objfile of PARENT. */ |
470 | ||
471 | void | |
472 | add_separate_debug_objfile (struct objfile *objfile, struct objfile *parent) | |
473 | { | |
474 | gdb_assert (objfile && parent); | |
475 | ||
476 | /* Must not be already in a list. */ | |
477 | gdb_assert (objfile->separate_debug_objfile_backlink == NULL); | |
478 | gdb_assert (objfile->separate_debug_objfile_link == NULL); | |
8a92335b JK |
479 | gdb_assert (objfile->separate_debug_objfile == NULL); |
480 | gdb_assert (parent->separate_debug_objfile_backlink == NULL); | |
481 | gdb_assert (parent->separate_debug_objfile_link == NULL); | |
15d123c9 TG |
482 | |
483 | objfile->separate_debug_objfile_backlink = parent; | |
484 | objfile->separate_debug_objfile_link = parent->separate_debug_objfile; | |
485 | parent->separate_debug_objfile = objfile; | |
486 | ||
487 | /* Put the separate debug object before the normal one, this is so that | |
0df8b418 | 488 | usage of the ALL_OBJFILES_SAFE macro will stay safe. */ |
15d123c9 TG |
489 | put_objfile_before (objfile, parent); |
490 | } | |
491 | ||
492 | /* Free all separate debug objfile of OBJFILE, but don't free OBJFILE | |
493 | itself. */ | |
494 | ||
495 | void | |
496 | free_objfile_separate_debug (struct objfile *objfile) | |
497 | { | |
498 | struct objfile *child; | |
499 | ||
500 | for (child = objfile->separate_debug_objfile; child;) | |
501 | { | |
502 | struct objfile *next_child = child->separate_debug_objfile_link; | |
503 | free_objfile (child); | |
504 | child = next_child; | |
505 | } | |
506 | } | |
c906108c SS |
507 | |
508 | /* Destroy an objfile and all the symtabs and psymtabs under it. Note | |
4a146b47 EZ |
509 | that as much as possible is allocated on the objfile_obstack |
510 | so that the memory can be efficiently freed. | |
c906108c SS |
511 | |
512 | Things which we do NOT free because they are not in malloc'd memory | |
513 | or not in memory specific to the objfile include: | |
514 | ||
c5aa993b | 515 | objfile -> sf |
c906108c SS |
516 | |
517 | FIXME: If the objfile is using reusable symbol information (via mmalloc), | |
518 | then we need to take into account the fact that more than one process | |
519 | may be using the symbol information at the same time (when mmalloc is | |
520 | extended to support cooperative locking). When more than one process | |
521 | is using the mapped symbol info, we need to be more careful about when | |
0df8b418 | 522 | we free objects in the reusable area. */ |
c906108c SS |
523 | |
524 | void | |
fba45db2 | 525 | free_objfile (struct objfile *objfile) |
c906108c | 526 | { |
15d123c9 TG |
527 | /* Free all separate debug objfiles. */ |
528 | free_objfile_separate_debug (objfile); | |
529 | ||
5b5d99cf JB |
530 | if (objfile->separate_debug_objfile_backlink) |
531 | { | |
532 | /* We freed the separate debug file, make sure the base objfile | |
533 | doesn't reference it. */ | |
15d123c9 TG |
534 | struct objfile *child; |
535 | ||
536 | child = objfile->separate_debug_objfile_backlink->separate_debug_objfile; | |
537 | ||
538 | if (child == objfile) | |
539 | { | |
540 | /* OBJFILE is the first child. */ | |
541 | objfile->separate_debug_objfile_backlink->separate_debug_objfile = | |
542 | objfile->separate_debug_objfile_link; | |
543 | } | |
544 | else | |
545 | { | |
546 | /* Find OBJFILE in the list. */ | |
547 | while (1) | |
548 | { | |
549 | if (child->separate_debug_objfile_link == objfile) | |
550 | { | |
551 | child->separate_debug_objfile_link = | |
552 | objfile->separate_debug_objfile_link; | |
553 | break; | |
554 | } | |
555 | child = child->separate_debug_objfile_link; | |
556 | gdb_assert (child); | |
557 | } | |
558 | } | |
5b5d99cf JB |
559 | } |
560 | ||
ae5a43e0 DJ |
561 | /* Remove any references to this objfile in the global value |
562 | lists. */ | |
563 | preserve_values (objfile); | |
564 | ||
9f743ef6 JK |
565 | /* It still may reference data modules have associated with the objfile and |
566 | the symbol file data. */ | |
567 | forget_cached_source_info_for_objfile (objfile); | |
568 | ||
2f202fde JK |
569 | breakpoint_free_objfile (objfile); |
570 | ||
c906108c SS |
571 | /* First do any symbol file specific actions required when we are |
572 | finished with a particular symbol file. Note that if the objfile | |
573 | is using reusable symbol information (via mmalloc) then each of | |
574 | these routines is responsible for doing the correct thing, either | |
575 | freeing things which are valid only during this particular gdb | |
0df8b418 | 576 | execution, or leaving them to be reused during the next one. */ |
c906108c | 577 | |
c5aa993b | 578 | if (objfile->sf != NULL) |
c906108c | 579 | { |
c5aa993b | 580 | (*objfile->sf->sym_finish) (objfile); |
c906108c SS |
581 | } |
582 | ||
9f743ef6 JK |
583 | /* Discard any data modules have associated with the objfile. The function |
584 | still may reference objfile->obfd. */ | |
c5bc3a77 DJ |
585 | objfile_free_data (objfile); |
586 | ||
706e3705 TT |
587 | if (objfile->obfd) |
588 | gdb_bfd_unref (objfile->obfd); | |
589 | else | |
590 | free_objfile_per_bfd_storage (objfile->per_bfd); | |
c906108c | 591 | |
0df8b418 | 592 | /* Remove it from the chain of all objfiles. */ |
c906108c SS |
593 | |
594 | unlink_objfile (objfile); | |
595 | ||
adb7f338 JK |
596 | if (objfile == symfile_objfile) |
597 | symfile_objfile = NULL; | |
c906108c SS |
598 | |
599 | if (objfile == rt_common_objfile) | |
600 | rt_common_objfile = NULL; | |
601 | ||
602 | /* Before the symbol table code was redone to make it easier to | |
603 | selectively load and remove information particular to a specific | |
604 | linkage unit, gdb used to do these things whenever the monolithic | |
605 | symbol table was blown away. How much still needs to be done | |
606 | is unknown, but we play it safe for now and keep each action until | |
0df8b418 | 607 | it is shown to be no longer needed. */ |
c5aa993b | 608 | |
cb5d864f FF |
609 | /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
610 | for example), so we need to call this here. */ | |
c906108c SS |
611 | clear_pc_function_cache (); |
612 | ||
9bdcbae7 DJ |
613 | /* Clear globals which might have pointed into a removed objfile. |
614 | FIXME: It's not clear which of these are supposed to persist | |
615 | between expressions and which ought to be reset each time. */ | |
616 | expression_context_block = NULL; | |
617 | innermost_block = NULL; | |
618 | ||
cb5d864f | 619 | /* Check to see if the current_source_symtab belongs to this objfile, |
0df8b418 | 620 | and if so, call clear_current_source_symtab_and_line. */ |
cb5d864f FF |
621 | |
622 | { | |
623 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
cb5d864f | 624 | |
00174a86 TT |
625 | if (cursal.symtab && cursal.symtab->objfile == objfile) |
626 | clear_current_source_symtab_and_line (); | |
cb5d864f FF |
627 | } |
628 | ||
0df8b418 | 629 | /* The last thing we do is free the objfile struct itself. */ |
c906108c | 630 | |
78a4a9b9 | 631 | if (objfile->global_psymbols.list) |
2dc74dc1 | 632 | xfree (objfile->global_psymbols.list); |
78a4a9b9 | 633 | if (objfile->static_psymbols.list) |
2dc74dc1 | 634 | xfree (objfile->static_psymbols.list); |
0df8b418 | 635 | /* Free the obstacks for non-reusable objfiles. */ |
710e1a31 | 636 | psymbol_bcache_free (objfile->psymbol_cache); |
78a4a9b9 AC |
637 | if (objfile->demangled_names_hash) |
638 | htab_delete (objfile->demangled_names_hash); | |
b99607ea | 639 | obstack_free (&objfile->objfile_obstack, 0); |
6c95b8df PA |
640 | |
641 | /* Rebuild section map next time we need it. */ | |
642 | get_objfile_pspace_data (objfile->pspace)->objfiles_changed_p = 1; | |
643 | ||
2dc74dc1 | 644 | xfree (objfile); |
c906108c SS |
645 | } |
646 | ||
74b7792f AC |
647 | static void |
648 | do_free_objfile_cleanup (void *obj) | |
649 | { | |
650 | free_objfile (obj); | |
651 | } | |
652 | ||
653 | struct cleanup * | |
654 | make_cleanup_free_objfile (struct objfile *obj) | |
655 | { | |
656 | return make_cleanup (do_free_objfile_cleanup, obj); | |
657 | } | |
c906108c SS |
658 | |
659 | /* Free all the object files at once and clean up their users. */ | |
660 | ||
661 | void | |
fba45db2 | 662 | free_all_objfiles (void) |
c906108c SS |
663 | { |
664 | struct objfile *objfile, *temp; | |
0133421a JK |
665 | struct so_list *so; |
666 | ||
667 | /* Any objfile referencewould become stale. */ | |
668 | for (so = master_so_list (); so; so = so->next) | |
669 | gdb_assert (so->objfile == NULL); | |
c906108c SS |
670 | |
671 | ALL_OBJFILES_SAFE (objfile, temp) | |
c5aa993b JM |
672 | { |
673 | free_objfile (objfile); | |
674 | } | |
c1e56572 | 675 | clear_symtab_users (0); |
c906108c SS |
676 | } |
677 | \f | |
34eaf542 TT |
678 | /* A helper function for objfile_relocate1 that relocates a single |
679 | symbol. */ | |
680 | ||
681 | static void | |
682 | relocate_one_symbol (struct symbol *sym, struct objfile *objfile, | |
683 | struct section_offsets *delta) | |
684 | { | |
685 | fixup_symbol_section (sym, objfile); | |
686 | ||
687 | /* The RS6000 code from which this was taken skipped | |
688 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. | |
689 | But I'm leaving out that test, on the theory that | |
690 | they can't possibly pass the tests below. */ | |
691 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
692 | || SYMBOL_CLASS (sym) == LOC_STATIC) | |
693 | && SYMBOL_SECTION (sym) >= 0) | |
694 | { | |
695 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
696 | } | |
697 | } | |
698 | ||
c906108c | 699 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS |
b260e109 JK |
700 | entries in new_offsets. SEPARATE_DEBUG_OBJFILE is not touched here. |
701 | Return non-zero iff any change happened. */ | |
567995e1 | 702 | |
b260e109 | 703 | static int |
5cc80db3 MS |
704 | objfile_relocate1 (struct objfile *objfile, |
705 | struct section_offsets *new_offsets) | |
c906108c | 706 | { |
30510692 | 707 | struct obj_section *s; |
d4f3574e | 708 | struct section_offsets *delta = |
a39a16c4 MM |
709 | ((struct section_offsets *) |
710 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
c906108c | 711 | |
5cc80db3 MS |
712 | int i; |
713 | int something_changed = 0; | |
714 | ||
715 | for (i = 0; i < objfile->num_sections; ++i) | |
716 | { | |
717 | delta->offsets[i] = | |
718 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); | |
719 | if (ANOFFSET (delta, i) != 0) | |
720 | something_changed = 1; | |
721 | } | |
722 | if (!something_changed) | |
723 | return 0; | |
c906108c SS |
724 | |
725 | /* OK, get all the symtabs. */ | |
726 | { | |
727 | struct symtab *s; | |
728 | ||
729 | ALL_OBJFILE_SYMTABS (objfile, s) | |
c5aa993b JM |
730 | { |
731 | struct linetable *l; | |
732 | struct blockvector *bv; | |
733 | int i; | |
734 | ||
735 | /* First the line table. */ | |
736 | l = LINETABLE (s); | |
737 | if (l) | |
738 | { | |
739 | for (i = 0; i < l->nitems; ++i) | |
740 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
741 | } | |
c906108c | 742 | |
c5aa993b JM |
743 | /* Don't relocate a shared blockvector more than once. */ |
744 | if (!s->primary) | |
745 | continue; | |
c906108c | 746 | |
c5aa993b | 747 | bv = BLOCKVECTOR (s); |
b101f7a1 UW |
748 | if (BLOCKVECTOR_MAP (bv)) |
749 | addrmap_relocate (BLOCKVECTOR_MAP (bv), | |
750 | ANOFFSET (delta, s->block_line_section)); | |
751 | ||
c5aa993b JM |
752 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) |
753 | { | |
754 | struct block *b; | |
e88c90f2 | 755 | struct symbol *sym; |
de4f826b | 756 | struct dict_iterator iter; |
c5aa993b JM |
757 | |
758 | b = BLOCKVECTOR_BLOCK (bv, i); | |
759 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
760 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); | |
761 | ||
8157b174 TT |
762 | /* We only want to iterate over the local symbols, not any |
763 | symbols in included symtabs. */ | |
764 | ALL_DICT_SYMBOLS (BLOCK_DICT (b), iter, sym) | |
c5aa993b | 765 | { |
34eaf542 | 766 | relocate_one_symbol (sym, objfile, delta); |
c5aa993b JM |
767 | } |
768 | } | |
769 | } | |
c906108c SS |
770 | } |
771 | ||
34eaf542 TT |
772 | /* Relocate isolated symbols. */ |
773 | { | |
774 | struct symbol *iter; | |
775 | ||
776 | for (iter = objfile->template_symbols; iter; iter = iter->hash_next) | |
777 | relocate_one_symbol (iter, objfile, delta); | |
778 | } | |
779 | ||
9b14d7aa JK |
780 | if (objfile->psymtabs_addrmap) |
781 | addrmap_relocate (objfile->psymtabs_addrmap, | |
782 | ANOFFSET (delta, SECT_OFF_TEXT (objfile))); | |
783 | ||
ccefe4c4 TT |
784 | if (objfile->sf) |
785 | objfile->sf->qf->relocate (objfile, new_offsets, delta); | |
c906108c SS |
786 | |
787 | { | |
788 | struct minimal_symbol *msym; | |
5cc80db3 | 789 | |
c906108c SS |
790 | ALL_OBJFILE_MSYMBOLS (objfile, msym) |
791 | if (SYMBOL_SECTION (msym) >= 0) | |
c5aa993b | 792 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); |
c906108c SS |
793 | } |
794 | /* Relocating different sections by different amounts may cause the symbols | |
795 | to be out of order. */ | |
796 | msymbols_sort (objfile); | |
797 | ||
abd0a5fa | 798 | if (objfile->ei.entry_point_p) |
36b0c0e0 PS |
799 | { |
800 | /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT | |
801 | only as a fallback. */ | |
802 | struct obj_section *s; | |
803 | s = find_pc_section (objfile->ei.entry_point); | |
804 | if (s) | |
805 | objfile->ei.entry_point += ANOFFSET (delta, s->the_bfd_section->index); | |
806 | else | |
807 | objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
808 | } | |
809 | ||
f1f2b5f4 PA |
810 | { |
811 | int i; | |
5cc80db3 | 812 | |
f1f2b5f4 PA |
813 | for (i = 0; i < objfile->num_sections; ++i) |
814 | (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); | |
815 | } | |
816 | ||
817 | /* Rebuild section map next time we need it. */ | |
6c95b8df | 818 | get_objfile_pspace_data (objfile->pspace)->objfiles_changed_p = 1; |
f1f2b5f4 | 819 | |
30510692 DJ |
820 | /* Update the table in exec_ops, used to read memory. */ |
821 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
822 | { | |
823 | int idx = s->the_bfd_section->index; | |
824 | ||
825 | exec_set_section_address (bfd_get_filename (objfile->obfd), idx, | |
f1f6aadf | 826 | obj_section_addr (s)); |
30510692 | 827 | } |
b260e109 | 828 | |
55aa24fb SDJ |
829 | /* Relocating probes. */ |
830 | if (objfile->sf && objfile->sf->sym_probe_fns) | |
831 | objfile->sf->sym_probe_fns->sym_relocate_probe (objfile, | |
832 | new_offsets, delta); | |
833 | ||
b260e109 JK |
834 | /* Data changed. */ |
835 | return 1; | |
567995e1 JK |
836 | } |
837 | ||
838 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
839 | entries in new_offsets. Process also OBJFILE's SEPARATE_DEBUG_OBJFILEs. | |
840 | ||
841 | The number and ordering of sections does differ between the two objfiles. | |
842 | Only their names match. Also the file offsets will differ (objfile being | |
843 | possibly prelinked but separate_debug_objfile is probably not prelinked) but | |
844 | the in-memory absolute address as specified by NEW_OFFSETS must match both | |
845 | files. */ | |
846 | ||
847 | void | |
848 | objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets) | |
849 | { | |
850 | struct objfile *debug_objfile; | |
b260e109 | 851 | int changed = 0; |
567995e1 | 852 | |
b260e109 | 853 | changed |= objfile_relocate1 (objfile, new_offsets); |
567995e1 JK |
854 | |
855 | for (debug_objfile = objfile->separate_debug_objfile; | |
856 | debug_objfile; | |
857 | debug_objfile = objfile_separate_debug_iterate (objfile, debug_objfile)) | |
858 | { | |
859 | struct section_addr_info *objfile_addrs; | |
860 | struct section_offsets *new_debug_offsets; | |
567995e1 JK |
861 | struct cleanup *my_cleanups; |
862 | ||
863 | objfile_addrs = build_section_addr_info_from_objfile (objfile); | |
864 | my_cleanups = make_cleanup (xfree, objfile_addrs); | |
865 | ||
866 | /* Here OBJFILE_ADDRS contain the correct absolute addresses, the | |
867 | relative ones must be already created according to debug_objfile. */ | |
868 | ||
869 | addr_info_make_relative (objfile_addrs, debug_objfile->obfd); | |
870 | ||
871 | gdb_assert (debug_objfile->num_sections | |
872 | == bfd_count_sections (debug_objfile->obfd)); | |
4fc06681 MS |
873 | new_debug_offsets = |
874 | xmalloc (SIZEOF_N_SECTION_OFFSETS (debug_objfile->num_sections)); | |
567995e1 JK |
875 | make_cleanup (xfree, new_debug_offsets); |
876 | relative_addr_info_to_section_offsets (new_debug_offsets, | |
877 | debug_objfile->num_sections, | |
878 | objfile_addrs); | |
879 | ||
b260e109 | 880 | changed |= objfile_relocate1 (debug_objfile, new_debug_offsets); |
567995e1 JK |
881 | |
882 | do_cleanups (my_cleanups); | |
883 | } | |
30510692 | 884 | |
0df8b418 | 885 | /* Relocate breakpoints as necessary, after things are relocated. */ |
b260e109 JK |
886 | if (changed) |
887 | breakpoint_re_set (); | |
c906108c | 888 | } |
4141a416 JB |
889 | |
890 | /* Rebase (add to the offsets) OBJFILE by SLIDE. SEPARATE_DEBUG_OBJFILE is | |
891 | not touched here. | |
892 | Return non-zero iff any change happened. */ | |
893 | ||
894 | static int | |
895 | objfile_rebase1 (struct objfile *objfile, CORE_ADDR slide) | |
896 | { | |
897 | struct section_offsets *new_offsets = | |
898 | ((struct section_offsets *) | |
899 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
900 | int i; | |
901 | ||
902 | for (i = 0; i < objfile->num_sections; ++i) | |
903 | new_offsets->offsets[i] = slide; | |
904 | ||
905 | return objfile_relocate1 (objfile, new_offsets); | |
906 | } | |
907 | ||
908 | /* Rebase (add to the offsets) OBJFILE by SLIDE. Process also OBJFILE's | |
909 | SEPARATE_DEBUG_OBJFILEs. */ | |
910 | ||
911 | void | |
912 | objfile_rebase (struct objfile *objfile, CORE_ADDR slide) | |
913 | { | |
914 | struct objfile *debug_objfile; | |
915 | int changed = 0; | |
916 | ||
917 | changed |= objfile_rebase1 (objfile, slide); | |
918 | ||
919 | for (debug_objfile = objfile->separate_debug_objfile; | |
920 | debug_objfile; | |
921 | debug_objfile = objfile_separate_debug_iterate (objfile, debug_objfile)) | |
922 | changed |= objfile_rebase1 (debug_objfile, slide); | |
923 | ||
924 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
925 | if (changed) | |
926 | breakpoint_re_set (); | |
927 | } | |
c906108c | 928 | \f |
55333a84 DE |
929 | /* Return non-zero if OBJFILE has partial symbols. */ |
930 | ||
931 | int | |
932 | objfile_has_partial_symbols (struct objfile *objfile) | |
933 | { | |
b11896a5 TT |
934 | if (!objfile->sf) |
935 | return 0; | |
3e03848b JK |
936 | |
937 | /* If we have not read psymbols, but we have a function capable of reading | |
938 | them, then that is an indication that they are in fact available. Without | |
939 | this function the symbols may have been already read in but they also may | |
940 | not be present in this objfile. */ | |
941 | if ((objfile->flags & OBJF_PSYMTABS_READ) == 0 | |
942 | && objfile->sf->sym_read_psymbols != NULL) | |
943 | return 1; | |
944 | ||
b11896a5 | 945 | return objfile->sf->qf->has_symbols (objfile); |
55333a84 DE |
946 | } |
947 | ||
948 | /* Return non-zero if OBJFILE has full symbols. */ | |
949 | ||
950 | int | |
951 | objfile_has_full_symbols (struct objfile *objfile) | |
952 | { | |
953 | return objfile->symtabs != NULL; | |
954 | } | |
955 | ||
e361b228 | 956 | /* Return non-zero if OBJFILE has full or partial symbols, either directly |
15d123c9 | 957 | or through a separate debug file. */ |
e361b228 TG |
958 | |
959 | int | |
960 | objfile_has_symbols (struct objfile *objfile) | |
961 | { | |
15d123c9 | 962 | struct objfile *o; |
e361b228 | 963 | |
15d123c9 TG |
964 | for (o = objfile; o; o = objfile_separate_debug_iterate (objfile, o)) |
965 | if (objfile_has_partial_symbols (o) || objfile_has_full_symbols (o)) | |
966 | return 1; | |
e361b228 TG |
967 | return 0; |
968 | } | |
969 | ||
970 | ||
c906108c SS |
971 | /* Many places in gdb want to test just to see if we have any partial |
972 | symbols available. This function returns zero if none are currently | |
0df8b418 | 973 | available, nonzero otherwise. */ |
c906108c SS |
974 | |
975 | int | |
fba45db2 | 976 | have_partial_symbols (void) |
c906108c SS |
977 | { |
978 | struct objfile *ofp; | |
979 | ||
980 | ALL_OBJFILES (ofp) | |
c5aa993b | 981 | { |
55333a84 DE |
982 | if (objfile_has_partial_symbols (ofp)) |
983 | return 1; | |
c5aa993b | 984 | } |
c906108c SS |
985 | return 0; |
986 | } | |
987 | ||
988 | /* Many places in gdb want to test just to see if we have any full | |
989 | symbols available. This function returns zero if none are currently | |
0df8b418 | 990 | available, nonzero otherwise. */ |
c906108c SS |
991 | |
992 | int | |
fba45db2 | 993 | have_full_symbols (void) |
c906108c SS |
994 | { |
995 | struct objfile *ofp; | |
996 | ||
997 | ALL_OBJFILES (ofp) | |
c5aa993b | 998 | { |
55333a84 DE |
999 | if (objfile_has_full_symbols (ofp)) |
1000 | return 1; | |
c5aa993b | 1001 | } |
c906108c SS |
1002 | return 0; |
1003 | } | |
1004 | ||
1005 | ||
1006 | /* This operations deletes all objfile entries that represent solibs that | |
1007 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
0df8b418 MS |
1008 | command. */ |
1009 | ||
c906108c | 1010 | void |
fba45db2 | 1011 | objfile_purge_solibs (void) |
c906108c | 1012 | { |
c5aa993b JM |
1013 | struct objfile *objf; |
1014 | struct objfile *temp; | |
c906108c SS |
1015 | |
1016 | ALL_OBJFILES_SAFE (objf, temp) | |
1017 | { | |
1018 | /* We assume that the solib package has been purged already, or will | |
0df8b418 MS |
1019 | be soon. */ |
1020 | ||
2df3850c | 1021 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
c906108c SS |
1022 | free_objfile (objf); |
1023 | } | |
1024 | } | |
1025 | ||
1026 | ||
1027 | /* Many places in gdb want to test just to see if we have any minimal | |
1028 | symbols available. This function returns zero if none are currently | |
0df8b418 | 1029 | available, nonzero otherwise. */ |
c906108c SS |
1030 | |
1031 | int | |
fba45db2 | 1032 | have_minimal_symbols (void) |
c906108c SS |
1033 | { |
1034 | struct objfile *ofp; | |
1035 | ||
1036 | ALL_OBJFILES (ofp) | |
c5aa993b | 1037 | { |
15831452 | 1038 | if (ofp->minimal_symbol_count > 0) |
c5aa993b JM |
1039 | { |
1040 | return 1; | |
1041 | } | |
1042 | } | |
c906108c SS |
1043 | return 0; |
1044 | } | |
1045 | ||
a845f5cb PP |
1046 | /* Qsort comparison function. */ |
1047 | ||
1048 | static int | |
1049 | qsort_cmp (const void *a, const void *b) | |
1050 | { | |
1051 | const struct obj_section *sect1 = *(const struct obj_section **) a; | |
1052 | const struct obj_section *sect2 = *(const struct obj_section **) b; | |
1053 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1054 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1055 | ||
1056 | if (sect1_addr < sect2_addr) | |
6fbf07cd | 1057 | return -1; |
a845f5cb | 1058 | else if (sect1_addr > sect2_addr) |
6fbf07cd PP |
1059 | return 1; |
1060 | else | |
5cc80db3 MS |
1061 | { |
1062 | /* Sections are at the same address. This could happen if | |
1063 | A) we have an objfile and a separate debuginfo. | |
1064 | B) we are confused, and have added sections without proper relocation, | |
0df8b418 | 1065 | or something like that. */ |
5cc80db3 MS |
1066 | |
1067 | const struct objfile *const objfile1 = sect1->objfile; | |
1068 | const struct objfile *const objfile2 = sect2->objfile; | |
1069 | ||
1070 | if (objfile1->separate_debug_objfile == objfile2 | |
1071 | || objfile2->separate_debug_objfile == objfile1) | |
1072 | { | |
1073 | /* Case A. The ordering doesn't matter: separate debuginfo files | |
1074 | will be filtered out later. */ | |
1075 | ||
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | /* Case B. Maintain stable sort order, so bugs in GDB are easier to | |
1080 | triage. This section could be slow (since we iterate over all | |
1081 | objfiles in each call to qsort_cmp), but this shouldn't happen | |
1082 | very often (GDB is already in a confused state; one hopes this | |
1083 | doesn't happen at all). If you discover that significant time is | |
1084 | spent in the loops below, do 'set complaints 100' and examine the | |
1085 | resulting complaints. */ | |
1086 | ||
1087 | if (objfile1 == objfile2) | |
1088 | { | |
1089 | /* Both sections came from the same objfile. We are really confused. | |
1090 | Sort on sequence order of sections within the objfile. */ | |
1091 | ||
1092 | const struct obj_section *osect; | |
1093 | ||
1094 | ALL_OBJFILE_OSECTIONS (objfile1, osect) | |
1095 | if (osect == sect1) | |
1096 | return -1; | |
1097 | else if (osect == sect2) | |
1098 | return 1; | |
1099 | ||
1100 | /* We should have found one of the sections before getting here. */ | |
f3574227 | 1101 | gdb_assert_not_reached ("section not found"); |
5cc80db3 MS |
1102 | } |
1103 | else | |
1104 | { | |
1105 | /* Sort on sequence number of the objfile in the chain. */ | |
1106 | ||
1107 | const struct objfile *objfile; | |
1108 | ||
1109 | ALL_OBJFILES (objfile) | |
1110 | if (objfile == objfile1) | |
1111 | return -1; | |
1112 | else if (objfile == objfile2) | |
1113 | return 1; | |
1114 | ||
1115 | /* We should have found one of the objfiles before getting here. */ | |
f3574227 | 1116 | gdb_assert_not_reached ("objfile not found"); |
5cc80db3 MS |
1117 | } |
1118 | } | |
6fbf07cd PP |
1119 | |
1120 | /* Unreachable. */ | |
f3574227 | 1121 | gdb_assert_not_reached ("unexpected code path"); |
a845f5cb PP |
1122 | return 0; |
1123 | } | |
1124 | ||
3aad21cf PP |
1125 | /* Select "better" obj_section to keep. We prefer the one that came from |
1126 | the real object, rather than the one from separate debuginfo. | |
1127 | Most of the time the two sections are exactly identical, but with | |
1128 | prelinking the .rel.dyn section in the real object may have different | |
1129 | size. */ | |
1130 | ||
1131 | static struct obj_section * | |
1132 | preferred_obj_section (struct obj_section *a, struct obj_section *b) | |
1133 | { | |
1134 | gdb_assert (obj_section_addr (a) == obj_section_addr (b)); | |
1135 | gdb_assert ((a->objfile->separate_debug_objfile == b->objfile) | |
1136 | || (b->objfile->separate_debug_objfile == a->objfile)); | |
1137 | gdb_assert ((a->objfile->separate_debug_objfile_backlink == b->objfile) | |
1138 | || (b->objfile->separate_debug_objfile_backlink == a->objfile)); | |
1139 | ||
1140 | if (a->objfile->separate_debug_objfile != NULL) | |
1141 | return a; | |
1142 | return b; | |
1143 | } | |
1144 | ||
6fbf07cd PP |
1145 | /* Return 1 if SECTION should be inserted into the section map. |
1146 | We want to insert only non-overlay and non-TLS section. */ | |
1147 | ||
1148 | static int | |
1149 | insert_section_p (const struct bfd *abfd, | |
1150 | const struct bfd_section *section) | |
1151 | { | |
1152 | const bfd_vma lma = bfd_section_lma (abfd, section); | |
1153 | ||
50f8ea94 | 1154 | if (overlay_debugging && lma != 0 && lma != bfd_section_vma (abfd, section) |
6fbf07cd PP |
1155 | && (bfd_get_file_flags (abfd) & BFD_IN_MEMORY) == 0) |
1156 | /* This is an overlay section. IN_MEMORY check is needed to avoid | |
1157 | discarding sections from the "system supplied DSO" (aka vdso) | |
1158 | on some Linux systems (e.g. Fedora 11). */ | |
1159 | return 0; | |
1160 | if ((bfd_get_section_flags (abfd, section) & SEC_THREAD_LOCAL) != 0) | |
1161 | /* This is a TLS section. */ | |
1162 | return 0; | |
1163 | ||
1164 | return 1; | |
1165 | } | |
1166 | ||
1167 | /* Filter out overlapping sections where one section came from the real | |
1168 | objfile, and the other from a separate debuginfo file. | |
1169 | Return the size of table after redundant sections have been eliminated. */ | |
1170 | ||
1171 | static int | |
1172 | filter_debuginfo_sections (struct obj_section **map, int map_size) | |
1173 | { | |
1174 | int i, j; | |
1175 | ||
1176 | for (i = 0, j = 0; i < map_size - 1; i++) | |
1177 | { | |
1178 | struct obj_section *const sect1 = map[i]; | |
1179 | struct obj_section *const sect2 = map[i + 1]; | |
1180 | const struct objfile *const objfile1 = sect1->objfile; | |
1181 | const struct objfile *const objfile2 = sect2->objfile; | |
1182 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1183 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1184 | ||
1185 | if (sect1_addr == sect2_addr | |
1186 | && (objfile1->separate_debug_objfile == objfile2 | |
1187 | || objfile2->separate_debug_objfile == objfile1)) | |
1188 | { | |
1189 | map[j++] = preferred_obj_section (sect1, sect2); | |
1190 | ++i; | |
1191 | } | |
1192 | else | |
1193 | map[j++] = sect1; | |
1194 | } | |
1195 | ||
1196 | if (i < map_size) | |
1197 | { | |
1198 | gdb_assert (i == map_size - 1); | |
1199 | map[j++] = map[i]; | |
1200 | } | |
1201 | ||
1202 | /* The map should not have shrunk to less than half the original size. */ | |
1203 | gdb_assert (map_size / 2 <= j); | |
1204 | ||
1205 | return j; | |
1206 | } | |
1207 | ||
1208 | /* Filter out overlapping sections, issuing a warning if any are found. | |
1209 | Overlapping sections could really be overlay sections which we didn't | |
1210 | classify as such in insert_section_p, or we could be dealing with a | |
1211 | corrupt binary. */ | |
1212 | ||
1213 | static int | |
1214 | filter_overlapping_sections (struct obj_section **map, int map_size) | |
1215 | { | |
1216 | int i, j; | |
1217 | ||
1218 | for (i = 0, j = 0; i < map_size - 1; ) | |
1219 | { | |
1220 | int k; | |
1221 | ||
1222 | map[j++] = map[i]; | |
1223 | for (k = i + 1; k < map_size; k++) | |
1224 | { | |
1225 | struct obj_section *const sect1 = map[i]; | |
1226 | struct obj_section *const sect2 = map[k]; | |
1227 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1228 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1229 | const CORE_ADDR sect1_endaddr = obj_section_endaddr (sect1); | |
1230 | ||
1231 | gdb_assert (sect1_addr <= sect2_addr); | |
1232 | ||
1233 | if (sect1_endaddr <= sect2_addr) | |
1234 | break; | |
1235 | else | |
1236 | { | |
1237 | /* We have an overlap. Report it. */ | |
1238 | ||
1239 | struct objfile *const objf1 = sect1->objfile; | |
1240 | struct objfile *const objf2 = sect2->objfile; | |
1241 | ||
6fbf07cd PP |
1242 | const struct bfd_section *const bfds1 = sect1->the_bfd_section; |
1243 | const struct bfd_section *const bfds2 = sect2->the_bfd_section; | |
1244 | ||
1245 | const CORE_ADDR sect2_endaddr = obj_section_endaddr (sect2); | |
1246 | ||
1247 | struct gdbarch *const gdbarch = get_objfile_arch (objf1); | |
1248 | ||
1249 | complaint (&symfile_complaints, | |
1250 | _("unexpected overlap between:\n" | |
1251 | " (A) section `%s' from `%s' [%s, %s)\n" | |
1252 | " (B) section `%s' from `%s' [%s, %s).\n" | |
1253 | "Will ignore section B"), | |
1254 | bfd_section_name (abfd1, bfds1), objf1->name, | |
1255 | paddress (gdbarch, sect1_addr), | |
1256 | paddress (gdbarch, sect1_endaddr), | |
1257 | bfd_section_name (abfd2, bfds2), objf2->name, | |
1258 | paddress (gdbarch, sect2_addr), | |
1259 | paddress (gdbarch, sect2_endaddr)); | |
1260 | } | |
1261 | } | |
1262 | i = k; | |
1263 | } | |
1264 | ||
1265 | if (i < map_size) | |
1266 | { | |
1267 | gdb_assert (i == map_size - 1); | |
1268 | map[j++] = map[i]; | |
1269 | } | |
1270 | ||
1271 | return j; | |
1272 | } | |
1273 | ||
1274 | ||
1275 | /* Update PMAP, PMAP_SIZE with sections from all objfiles, excluding any | |
1276 | TLS, overlay and overlapping sections. */ | |
a845f5cb PP |
1277 | |
1278 | static void | |
6c95b8df PA |
1279 | update_section_map (struct program_space *pspace, |
1280 | struct obj_section ***pmap, int *pmap_size) | |
a845f5cb | 1281 | { |
6fbf07cd | 1282 | int alloc_size, map_size, i; |
a845f5cb PP |
1283 | struct obj_section *s, **map; |
1284 | struct objfile *objfile; | |
1285 | ||
6c95b8df | 1286 | gdb_assert (get_objfile_pspace_data (pspace)->objfiles_changed_p != 0); |
a845f5cb PP |
1287 | |
1288 | map = *pmap; | |
1289 | xfree (map); | |
1290 | ||
6fbf07cd | 1291 | alloc_size = 0; |
6c95b8df PA |
1292 | ALL_PSPACE_OBJFILES (pspace, objfile) |
1293 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
1294 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1295 | alloc_size += 1; | |
a845f5cb | 1296 | |
65a97ab3 PP |
1297 | /* This happens on detach/attach (e.g. in gdb.base/attach.exp). */ |
1298 | if (alloc_size == 0) | |
1299 | { | |
1300 | *pmap = NULL; | |
1301 | *pmap_size = 0; | |
1302 | return; | |
1303 | } | |
1304 | ||
6fbf07cd | 1305 | map = xmalloc (alloc_size * sizeof (*map)); |
a845f5cb | 1306 | |
3aad21cf | 1307 | i = 0; |
6c95b8df PA |
1308 | ALL_PSPACE_OBJFILES (pspace, objfile) |
1309 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
1310 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1311 | map[i++] = s; | |
a845f5cb | 1312 | |
6fbf07cd PP |
1313 | qsort (map, alloc_size, sizeof (*map), qsort_cmp); |
1314 | map_size = filter_debuginfo_sections(map, alloc_size); | |
1315 | map_size = filter_overlapping_sections(map, map_size); | |
a845f5cb | 1316 | |
6fbf07cd PP |
1317 | if (map_size < alloc_size) |
1318 | /* Some sections were eliminated. Trim excess space. */ | |
1319 | map = xrealloc (map, map_size * sizeof (*map)); | |
3aad21cf | 1320 | else |
6fbf07cd | 1321 | gdb_assert (alloc_size == map_size); |
3aad21cf | 1322 | |
a845f5cb PP |
1323 | *pmap = map; |
1324 | *pmap_size = map_size; | |
1325 | } | |
1326 | ||
0df8b418 | 1327 | /* Bsearch comparison function. */ |
a845f5cb PP |
1328 | |
1329 | static int | |
1330 | bsearch_cmp (const void *key, const void *elt) | |
1331 | { | |
1332 | const CORE_ADDR pc = *(CORE_ADDR *) key; | |
1333 | const struct obj_section *section = *(const struct obj_section **) elt; | |
1334 | ||
1335 | if (pc < obj_section_addr (section)) | |
1336 | return -1; | |
1337 | if (pc < obj_section_endaddr (section)) | |
1338 | return 0; | |
1339 | return 1; | |
1340 | } | |
1341 | ||
714835d5 | 1342 | /* Returns a section whose range includes PC or NULL if none found. */ |
c906108c SS |
1343 | |
1344 | struct obj_section * | |
714835d5 | 1345 | find_pc_section (CORE_ADDR pc) |
c906108c | 1346 | { |
6c95b8df | 1347 | struct objfile_pspace_info *pspace_info; |
a845f5cb | 1348 | struct obj_section *s, **sp; |
c5aa993b | 1349 | |
714835d5 UW |
1350 | /* Check for mapped overlay section first. */ |
1351 | s = find_pc_mapped_section (pc); | |
1352 | if (s) | |
1353 | return s; | |
c906108c | 1354 | |
6c95b8df PA |
1355 | pspace_info = get_objfile_pspace_data (current_program_space); |
1356 | if (pspace_info->objfiles_changed_p != 0) | |
a845f5cb | 1357 | { |
6c95b8df PA |
1358 | update_section_map (current_program_space, |
1359 | &pspace_info->sections, | |
1360 | &pspace_info->num_sections); | |
c906108c | 1361 | |
6c95b8df PA |
1362 | /* Don't need updates to section map until objfiles are added, |
1363 | removed or relocated. */ | |
1364 | pspace_info->objfiles_changed_p = 0; | |
a845f5cb PP |
1365 | } |
1366 | ||
65a97ab3 PP |
1367 | /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to |
1368 | bsearch be non-NULL. */ | |
1369 | if (pspace_info->sections == NULL) | |
1370 | { | |
1371 | gdb_assert (pspace_info->num_sections == 0); | |
1372 | return NULL; | |
1373 | } | |
1374 | ||
6c95b8df PA |
1375 | sp = (struct obj_section **) bsearch (&pc, |
1376 | pspace_info->sections, | |
1377 | pspace_info->num_sections, | |
1378 | sizeof (*pspace_info->sections), | |
1379 | bsearch_cmp); | |
a845f5cb PP |
1380 | if (sp != NULL) |
1381 | return *sp; | |
714835d5 | 1382 | return NULL; |
c906108c | 1383 | } |
c5aa993b | 1384 | |
c906108c SS |
1385 | |
1386 | /* In SVR4, we recognize a trampoline by it's section name. | |
1387 | That is, if the pc is in a section named ".plt" then we are in | |
1388 | a trampoline. */ | |
1389 | ||
1390 | int | |
fba45db2 | 1391 | in_plt_section (CORE_ADDR pc, char *name) |
c906108c SS |
1392 | { |
1393 | struct obj_section *s; | |
1394 | int retval = 0; | |
c5aa993b JM |
1395 | |
1396 | s = find_pc_section (pc); | |
1397 | ||
c906108c SS |
1398 | retval = (s != NULL |
1399 | && s->the_bfd_section->name != NULL | |
6314a349 | 1400 | && strcmp (s->the_bfd_section->name, ".plt") == 0); |
c5aa993b | 1401 | return (retval); |
c906108c | 1402 | } |
0d0e1a63 MK |
1403 | \f |
1404 | ||
bb272892 PP |
1405 | /* Set objfiles_changed_p so section map will be rebuilt next time it |
1406 | is used. Called by reread_symbols. */ | |
a845f5cb PP |
1407 | |
1408 | void | |
bb272892 | 1409 | objfiles_changed (void) |
a845f5cb | 1410 | { |
6c95b8df PA |
1411 | /* Rebuild section map next time we need it. */ |
1412 | get_objfile_pspace_data (current_program_space)->objfiles_changed_p = 1; | |
a845f5cb | 1413 | } |
e3c69974 | 1414 | |
19630284 JB |
1415 | /* The default implementation for the "iterate_over_objfiles_in_search_order" |
1416 | gdbarch method. It is equivalent to use the ALL_OBJFILES macro, | |
1417 | searching the objfiles in the order they are stored internally, | |
1418 | ignoring CURRENT_OBJFILE. | |
1419 | ||
1420 | On most platorms, it should be close enough to doing the best | |
1421 | we can without some knowledge specific to the architecture. */ | |
1422 | ||
1423 | void | |
1424 | default_iterate_over_objfiles_in_search_order | |
1425 | (struct gdbarch *gdbarch, | |
1426 | iterate_over_objfiles_in_search_order_cb_ftype *cb, | |
1427 | void *cb_data, struct objfile *current_objfile) | |
1428 | { | |
1429 | int stop = 0; | |
1430 | struct objfile *objfile; | |
1431 | ||
1432 | ALL_OBJFILES (objfile) | |
1433 | { | |
1434 | stop = cb (objfile, cb_data); | |
1435 | if (stop) | |
1436 | return; | |
1437 | } | |
1438 | } | |
1439 | ||
6c95b8df PA |
1440 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
1441 | extern initialize_file_ftype _initialize_objfiles; | |
1442 | ||
1443 | void | |
1444 | _initialize_objfiles (void) | |
1445 | { | |
1446 | objfiles_pspace_data | |
8e260fc0 TT |
1447 | = register_program_space_data_with_cleanup (NULL, |
1448 | objfiles_pspace_data_cleanup); | |
706e3705 TT |
1449 | |
1450 | objfiles_bfd_data = register_bfd_data_with_cleanup (NULL, | |
1451 | objfile_bfd_data_free); | |
6c95b8df | 1452 | } |