Commit | Line | Data |
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c906108c | 1 | /* GDB routines for manipulating objfiles. |
af5f3db6 | 2 | |
6aba47ca | 3 | Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
0fb0cc75 | 4 | 2002, 2003, 2004, 2007, 2008, 2009 Free Software Foundation, Inc. |
af5f3db6 | 5 | |
c906108c SS |
6 | Contributed by Cygnus Support, using pieces from other GDB modules. |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 13 | (at your option) any later version. |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b | 20 | You should have received a copy of the GNU General Public License |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
22 | |
23 | /* This file contains support routines for creating, manipulating, and | |
24 | destroying objfile structures. */ | |
25 | ||
26 | #include "defs.h" | |
27 | #include "bfd.h" /* Binary File Description */ | |
28 | #include "symtab.h" | |
29 | #include "symfile.h" | |
30 | #include "objfiles.h" | |
31 | #include "gdb-stabs.h" | |
32 | #include "target.h" | |
af5f3db6 | 33 | #include "bcache.h" |
5b123146 | 34 | #include "mdebugread.h" |
9bdcbae7 DJ |
35 | #include "expression.h" |
36 | #include "parser-defs.h" | |
37 | ||
0d0e1a63 | 38 | #include "gdb_assert.h" |
c906108c SS |
39 | #include <sys/types.h> |
40 | #include "gdb_stat.h" | |
41 | #include <fcntl.h> | |
04ea0df1 | 42 | #include "gdb_obstack.h" |
c906108c | 43 | #include "gdb_string.h" |
2de7ced7 | 44 | #include "hashtab.h" |
c906108c | 45 | |
7a292a7a | 46 | #include "breakpoint.h" |
fe898f56 | 47 | #include "block.h" |
de4f826b | 48 | #include "dictionary.h" |
cb5d864f | 49 | #include "source.h" |
801e3a5b | 50 | #include "addrmap.h" |
5e2b427d | 51 | #include "arch-utils.h" |
30510692 | 52 | #include "exec.h" |
a845f5cb | 53 | #include "observer.h" |
7a292a7a | 54 | |
c906108c SS |
55 | /* Prototypes for local functions */ |
56 | ||
0d0e1a63 MK |
57 | static void objfile_alloc_data (struct objfile *objfile); |
58 | static void objfile_free_data (struct objfile *objfile); | |
59 | ||
c906108c SS |
60 | /* Externally visible variables that are owned by this module. |
61 | See declarations in objfile.h for more info. */ | |
62 | ||
c5aa993b | 63 | struct objfile *object_files; /* Linked list of all objfiles */ |
c906108c SS |
64 | struct objfile *current_objfile; /* For symbol file being read in */ |
65 | struct objfile *symfile_objfile; /* Main symbol table loaded from */ | |
66 | struct objfile *rt_common_objfile; /* For runtime common symbols */ | |
67 | ||
a845f5cb PP |
68 | /* Records whether any objfiles appeared or disappeared since we last updated |
69 | address to obj section map. */ | |
70 | ||
bb272892 | 71 | static int objfiles_changed_p; |
a845f5cb | 72 | |
c906108c SS |
73 | /* Locate all mappable sections of a BFD file. |
74 | objfile_p_char is a char * to get it through | |
75 | bfd_map_over_sections; we cast it back to its proper type. */ | |
76 | ||
96baa820 JM |
77 | /* Called via bfd_map_over_sections to build up the section table that |
78 | the objfile references. The objfile contains pointers to the start | |
79 | of the table (objfile->sections) and to the first location after | |
80 | the end of the table (objfile->sections_end). */ | |
81 | ||
c906108c | 82 | static void |
7be0c536 AC |
83 | add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect, |
84 | void *objfile_p_char) | |
c906108c SS |
85 | { |
86 | struct objfile *objfile = (struct objfile *) objfile_p_char; | |
87 | struct obj_section section; | |
88 | flagword aflag; | |
89 | ||
90 | aflag = bfd_get_section_flags (abfd, asect); | |
91 | ||
ed7c5e43 | 92 | if (!(aflag & SEC_ALLOC)) |
c906108c SS |
93 | return; |
94 | ||
95 | if (0 == bfd_section_size (abfd, asect)) | |
96 | return; | |
c906108c SS |
97 | section.objfile = objfile; |
98 | section.the_bfd_section = asect; | |
99 | section.ovly_mapped = 0; | |
8b92e4d5 | 100 | obstack_grow (&objfile->objfile_obstack, (char *) §ion, sizeof (section)); |
f1f6aadf PA |
101 | objfile->sections_end |
102 | = (struct obj_section *) (((size_t) objfile->sections_end) + 1); | |
c906108c SS |
103 | } |
104 | ||
105 | /* Builds a section table for OBJFILE. | |
106 | Returns 0 if OK, 1 on error (in which case bfd_error contains the | |
96baa820 JM |
107 | error). |
108 | ||
109 | Note that while we are building the table, which goes into the | |
110 | psymbol obstack, we hijack the sections_end pointer to instead hold | |
111 | a count of the number of sections. When bfd_map_over_sections | |
112 | returns, this count is used to compute the pointer to the end of | |
113 | the sections table, which then overwrites the count. | |
114 | ||
115 | Also note that the OFFSET and OVLY_MAPPED in each table entry | |
116 | are initialized to zero. | |
117 | ||
118 | Also note that if anything else writes to the psymbol obstack while | |
119 | we are building the table, we're pretty much hosed. */ | |
c906108c SS |
120 | |
121 | int | |
fba45db2 | 122 | build_objfile_section_table (struct objfile *objfile) |
c906108c SS |
123 | { |
124 | /* objfile->sections can be already set when reading a mapped symbol | |
125 | file. I believe that we do need to rebuild the section table in | |
126 | this case (we rebuild other things derived from the bfd), but we | |
8b92e4d5 | 127 | can't free the old one (it's in the objfile_obstack). So we just |
c906108c SS |
128 | waste some memory. */ |
129 | ||
130 | objfile->sections_end = 0; | |
f1f6aadf PA |
131 | bfd_map_over_sections (objfile->obfd, |
132 | add_to_objfile_sections, (void *) objfile); | |
133 | objfile->sections = obstack_finish (&objfile->objfile_obstack); | |
134 | objfile->sections_end = objfile->sections + (size_t) objfile->sections_end; | |
c5aa993b | 135 | return (0); |
c906108c SS |
136 | } |
137 | ||
2df3850c JM |
138 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits |
139 | allocate a new objfile struct, fill it in as best we can, link it | |
140 | into the list of all known objfiles, and return a pointer to the | |
141 | new objfile struct. | |
c906108c | 142 | |
2df3850c | 143 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
78a4a9b9 AC |
144 | requests for specific operations. Other bits like OBJF_SHARED are |
145 | simply copied through to the new objfile flags member. */ | |
c906108c | 146 | |
eb9a305d DC |
147 | /* NOTE: carlton/2003-02-04: This function is called with args NULL, 0 |
148 | by jv-lang.c, to create an artificial objfile used to hold | |
149 | information about dynamically-loaded Java classes. Unfortunately, | |
150 | that branch of this function doesn't get tested very frequently, so | |
151 | it's prone to breakage. (E.g. at one time the name was set to NULL | |
152 | in that situation, which broke a loop over all names in the dynamic | |
153 | library loader.) If you change this function, please try to leave | |
154 | things in a consistent state even if abfd is NULL. */ | |
155 | ||
c906108c | 156 | struct objfile * |
fba45db2 | 157 | allocate_objfile (bfd *abfd, int flags) |
c906108c SS |
158 | { |
159 | struct objfile *objfile = NULL; | |
160 | struct objfile *last_one = NULL; | |
161 | ||
c906108c SS |
162 | /* If we don't support mapped symbol files, didn't ask for the file to be |
163 | mapped, or failed to open the mapped file for some reason, then revert | |
164 | back to an unmapped objfile. */ | |
165 | ||
166 | if (objfile == NULL) | |
167 | { | |
168 | objfile = (struct objfile *) xmalloc (sizeof (struct objfile)); | |
169 | memset (objfile, 0, sizeof (struct objfile)); | |
af5f3db6 AC |
170 | objfile->psymbol_cache = bcache_xmalloc (); |
171 | objfile->macro_cache = bcache_xmalloc (); | |
1ab21617 EZ |
172 | /* We could use obstack_specify_allocation here instead, but |
173 | gdb_obstack.h specifies the alloc/dealloc functions. */ | |
174 | obstack_init (&objfile->objfile_obstack); | |
15831452 | 175 | terminate_minimal_symbol_table (objfile); |
c906108c SS |
176 | } |
177 | ||
0d0e1a63 MK |
178 | objfile_alloc_data (objfile); |
179 | ||
c906108c SS |
180 | /* Update the per-objfile information that comes from the bfd, ensuring |
181 | that any data that is reference is saved in the per-objfile data | |
182 | region. */ | |
183 | ||
3db741ef | 184 | objfile->obfd = gdb_bfd_ref (abfd); |
c5aa993b | 185 | if (objfile->name != NULL) |
c906108c | 186 | { |
2dc74dc1 | 187 | xfree (objfile->name); |
c906108c SS |
188 | } |
189 | if (abfd != NULL) | |
190 | { | |
5e2b427d UW |
191 | /* Look up the gdbarch associated with the BFD. */ |
192 | objfile->gdbarch = gdbarch_from_bfd (abfd); | |
193 | ||
982526a1 | 194 | objfile->name = xstrdup (bfd_get_filename (abfd)); |
c5aa993b | 195 | objfile->mtime = bfd_get_mtime (abfd); |
c906108c SS |
196 | |
197 | /* Build section table. */ | |
198 | ||
199 | if (build_objfile_section_table (objfile)) | |
200 | { | |
8a3fe4f8 | 201 | error (_("Can't find the file sections in `%s': %s"), |
c5aa993b | 202 | objfile->name, bfd_errmsg (bfd_get_error ())); |
c906108c SS |
203 | } |
204 | } | |
eb9a305d DC |
205 | else |
206 | { | |
982526a1 | 207 | objfile->name = xstrdup ("<<anonymous objfile>>"); |
eb9a305d | 208 | } |
c906108c | 209 | |
b8fbeb18 EZ |
210 | /* Initialize the section indexes for this objfile, so that we can |
211 | later detect if they are used w/o being properly assigned to. */ | |
212 | ||
5c4e30ca DC |
213 | objfile->sect_index_text = -1; |
214 | objfile->sect_index_data = -1; | |
215 | objfile->sect_index_bss = -1; | |
216 | objfile->sect_index_rodata = -1; | |
217 | ||
218 | /* We don't yet have a C++-specific namespace symtab. */ | |
219 | ||
220 | objfile->cp_namespace_symtab = NULL; | |
b8fbeb18 | 221 | |
c906108c SS |
222 | /* Add this file onto the tail of the linked list of other such files. */ |
223 | ||
c5aa993b | 224 | objfile->next = NULL; |
c906108c SS |
225 | if (object_files == NULL) |
226 | object_files = objfile; | |
227 | else | |
228 | { | |
229 | for (last_one = object_files; | |
c5aa993b JM |
230 | last_one->next; |
231 | last_one = last_one->next); | |
232 | last_one->next = objfile; | |
c906108c SS |
233 | } |
234 | ||
2df3850c JM |
235 | /* Save passed in flag bits. */ |
236 | objfile->flags |= flags; | |
c906108c | 237 | |
bb272892 PP |
238 | objfiles_changed_p = 1; /* Rebuild section map next time we need it. */ |
239 | ||
c906108c SS |
240 | return (objfile); |
241 | } | |
242 | ||
5e2b427d UW |
243 | /* Retrieve the gdbarch associated with OBJFILE. */ |
244 | struct gdbarch * | |
245 | get_objfile_arch (struct objfile *objfile) | |
246 | { | |
247 | return objfile->gdbarch; | |
248 | } | |
249 | ||
9ab9195f EZ |
250 | /* Initialize entry point information for this objfile. */ |
251 | ||
252 | void | |
253 | init_entry_point_info (struct objfile *objfile) | |
254 | { | |
255 | /* Save startup file's range of PC addresses to help blockframe.c | |
256 | decide where the bottom of the stack is. */ | |
257 | ||
258 | if (bfd_get_file_flags (objfile->obfd) & EXEC_P) | |
259 | { | |
260 | /* Executable file -- record its entry point so we'll recognize | |
261 | the startup file because it contains the entry point. */ | |
262 | objfile->ei.entry_point = bfd_get_start_address (objfile->obfd); | |
263 | } | |
574dffa2 DJ |
264 | else if (bfd_get_file_flags (objfile->obfd) & DYNAMIC |
265 | && bfd_get_start_address (objfile->obfd) != 0) | |
266 | /* Some shared libraries may have entry points set and be | |
267 | runnable. There's no clear way to indicate this, so just check | |
268 | for values other than zero. */ | |
269 | objfile->ei.entry_point = bfd_get_start_address (objfile->obfd); | |
9ab9195f EZ |
270 | else |
271 | { | |
272 | /* Examination of non-executable.o files. Short-circuit this stuff. */ | |
273 | objfile->ei.entry_point = INVALID_ENTRY_POINT; | |
274 | } | |
9ab9195f EZ |
275 | } |
276 | ||
277 | /* Get current entry point address. */ | |
278 | ||
279 | CORE_ADDR | |
280 | entry_point_address (void) | |
281 | { | |
3612b192 DJ |
282 | struct gdbarch *gdbarch; |
283 | CORE_ADDR entry_point; | |
284 | ||
285 | if (symfile_objfile == NULL) | |
286 | return 0; | |
287 | ||
288 | gdbarch = get_objfile_arch (symfile_objfile); | |
289 | ||
290 | entry_point = symfile_objfile->ei.entry_point; | |
291 | ||
292 | /* Make certain that the address points at real code, and not a | |
293 | function descriptor. */ | |
294 | entry_point = gdbarch_convert_from_func_ptr_addr (gdbarch, entry_point, | |
295 | ¤t_target); | |
296 | ||
297 | /* Remove any ISA markers, so that this matches entries in the | |
298 | symbol table. */ | |
299 | entry_point = gdbarch_addr_bits_remove (gdbarch, entry_point); | |
300 | ||
301 | return entry_point; | |
9ab9195f | 302 | } |
15831452 JB |
303 | |
304 | /* Create the terminating entry of OBJFILE's minimal symbol table. | |
305 | If OBJFILE->msymbols is zero, allocate a single entry from | |
4a146b47 | 306 | OBJFILE->objfile_obstack; otherwise, just initialize |
15831452 JB |
307 | OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */ |
308 | void | |
309 | terminate_minimal_symbol_table (struct objfile *objfile) | |
310 | { | |
311 | if (! objfile->msymbols) | |
312 | objfile->msymbols = ((struct minimal_symbol *) | |
4a146b47 | 313 | obstack_alloc (&objfile->objfile_obstack, |
15831452 JB |
314 | sizeof (objfile->msymbols[0]))); |
315 | ||
316 | { | |
317 | struct minimal_symbol *m | |
318 | = &objfile->msymbols[objfile->minimal_symbol_count]; | |
319 | ||
320 | memset (m, 0, sizeof (*m)); | |
5bf0017e EZ |
321 | /* Don't rely on these enumeration values being 0's. */ |
322 | MSYMBOL_TYPE (m) = mst_unknown; | |
15831452 JB |
323 | SYMBOL_INIT_LANGUAGE_SPECIFIC (m, language_unknown); |
324 | } | |
325 | } | |
326 | ||
327 | ||
5b5d99cf JB |
328 | /* Put one object file before a specified on in the global list. |
329 | This can be used to make sure an object file is destroyed before | |
330 | another when using ALL_OBJFILES_SAFE to free all objfiles. */ | |
331 | void | |
332 | put_objfile_before (struct objfile *objfile, struct objfile *before_this) | |
333 | { | |
334 | struct objfile **objp; | |
335 | ||
336 | unlink_objfile (objfile); | |
337 | ||
338 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
339 | { | |
340 | if (*objp == before_this) | |
341 | { | |
342 | objfile->next = *objp; | |
343 | *objp = objfile; | |
344 | return; | |
345 | } | |
346 | } | |
347 | ||
348 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 349 | _("put_objfile_before: before objfile not in list")); |
5b5d99cf JB |
350 | } |
351 | ||
c906108c SS |
352 | /* Put OBJFILE at the front of the list. */ |
353 | ||
354 | void | |
fba45db2 | 355 | objfile_to_front (struct objfile *objfile) |
c906108c SS |
356 | { |
357 | struct objfile **objp; | |
358 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
359 | { | |
360 | if (*objp == objfile) | |
361 | { | |
362 | /* Unhook it from where it is. */ | |
363 | *objp = objfile->next; | |
364 | /* Put it in the front. */ | |
365 | objfile->next = object_files; | |
366 | object_files = objfile; | |
367 | break; | |
368 | } | |
369 | } | |
370 | } | |
371 | ||
372 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the | |
373 | list. | |
374 | ||
375 | It is not a bug, or error, to call this function if OBJFILE is not known | |
376 | to be in the current list. This is done in the case of mapped objfiles, | |
377 | for example, just to ensure that the mapped objfile doesn't appear twice | |
378 | in the list. Since the list is threaded, linking in a mapped objfile | |
379 | twice would create a circular list. | |
380 | ||
381 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
382 | unlinking it, just to ensure that we have completely severed any linkages | |
383 | between the OBJFILE and the list. */ | |
384 | ||
385 | void | |
fba45db2 | 386 | unlink_objfile (struct objfile *objfile) |
c906108c | 387 | { |
c5aa993b | 388 | struct objfile **objpp; |
c906108c | 389 | |
c5aa993b | 390 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
c906108c | 391 | { |
c5aa993b | 392 | if (*objpp == objfile) |
c906108c | 393 | { |
c5aa993b JM |
394 | *objpp = (*objpp)->next; |
395 | objfile->next = NULL; | |
07cd4b97 | 396 | return; |
c906108c SS |
397 | } |
398 | } | |
07cd4b97 | 399 | |
8e65ff28 | 400 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 401 | _("unlink_objfile: objfile already unlinked")); |
c906108c SS |
402 | } |
403 | ||
404 | ||
405 | /* Destroy an objfile and all the symtabs and psymtabs under it. Note | |
4a146b47 EZ |
406 | that as much as possible is allocated on the objfile_obstack |
407 | so that the memory can be efficiently freed. | |
c906108c SS |
408 | |
409 | Things which we do NOT free because they are not in malloc'd memory | |
410 | or not in memory specific to the objfile include: | |
411 | ||
c5aa993b | 412 | objfile -> sf |
c906108c SS |
413 | |
414 | FIXME: If the objfile is using reusable symbol information (via mmalloc), | |
415 | then we need to take into account the fact that more than one process | |
416 | may be using the symbol information at the same time (when mmalloc is | |
417 | extended to support cooperative locking). When more than one process | |
418 | is using the mapped symbol info, we need to be more careful about when | |
419 | we free objects in the reusable area. */ | |
420 | ||
421 | void | |
fba45db2 | 422 | free_objfile (struct objfile *objfile) |
c906108c | 423 | { |
5b5d99cf JB |
424 | if (objfile->separate_debug_objfile) |
425 | { | |
426 | free_objfile (objfile->separate_debug_objfile); | |
427 | } | |
428 | ||
429 | if (objfile->separate_debug_objfile_backlink) | |
430 | { | |
431 | /* We freed the separate debug file, make sure the base objfile | |
432 | doesn't reference it. */ | |
433 | objfile->separate_debug_objfile_backlink->separate_debug_objfile = NULL; | |
434 | } | |
435 | ||
ae5a43e0 DJ |
436 | /* Remove any references to this objfile in the global value |
437 | lists. */ | |
438 | preserve_values (objfile); | |
439 | ||
c906108c SS |
440 | /* First do any symbol file specific actions required when we are |
441 | finished with a particular symbol file. Note that if the objfile | |
442 | is using reusable symbol information (via mmalloc) then each of | |
443 | these routines is responsible for doing the correct thing, either | |
444 | freeing things which are valid only during this particular gdb | |
445 | execution, or leaving them to be reused during the next one. */ | |
446 | ||
c5aa993b | 447 | if (objfile->sf != NULL) |
c906108c | 448 | { |
c5aa993b | 449 | (*objfile->sf->sym_finish) (objfile); |
c906108c SS |
450 | } |
451 | ||
c5bc3a77 DJ |
452 | /* Discard any data modules have associated with the objfile. */ |
453 | objfile_free_data (objfile); | |
454 | ||
e3c69974 | 455 | gdb_bfd_unref (objfile->obfd); |
c906108c SS |
456 | |
457 | /* Remove it from the chain of all objfiles. */ | |
458 | ||
459 | unlink_objfile (objfile); | |
460 | ||
461 | /* If we are going to free the runtime common objfile, mark it | |
462 | as unallocated. */ | |
463 | ||
464 | if (objfile == rt_common_objfile) | |
465 | rt_common_objfile = NULL; | |
466 | ||
467 | /* Before the symbol table code was redone to make it easier to | |
468 | selectively load and remove information particular to a specific | |
469 | linkage unit, gdb used to do these things whenever the monolithic | |
470 | symbol table was blown away. How much still needs to be done | |
471 | is unknown, but we play it safe for now and keep each action until | |
472 | it is shown to be no longer needed. */ | |
c5aa993b | 473 | |
cb5d864f FF |
474 | /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
475 | for example), so we need to call this here. */ | |
c906108c SS |
476 | clear_pc_function_cache (); |
477 | ||
9bdcbae7 DJ |
478 | /* Clear globals which might have pointed into a removed objfile. |
479 | FIXME: It's not clear which of these are supposed to persist | |
480 | between expressions and which ought to be reset each time. */ | |
481 | expression_context_block = NULL; | |
482 | innermost_block = NULL; | |
483 | ||
cb5d864f FF |
484 | /* Check to see if the current_source_symtab belongs to this objfile, |
485 | and if so, call clear_current_source_symtab_and_line. */ | |
486 | ||
487 | { | |
488 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
489 | struct symtab *s; | |
490 | ||
491 | ALL_OBJFILE_SYMTABS (objfile, s) | |
492 | { | |
493 | if (s == cursal.symtab) | |
494 | clear_current_source_symtab_and_line (); | |
495 | } | |
496 | } | |
497 | ||
78a4a9b9 | 498 | /* The last thing we do is free the objfile struct itself. */ |
c906108c | 499 | |
78a4a9b9 | 500 | if (objfile->name != NULL) |
c906108c | 501 | { |
2dc74dc1 | 502 | xfree (objfile->name); |
c906108c | 503 | } |
78a4a9b9 | 504 | if (objfile->global_psymbols.list) |
2dc74dc1 | 505 | xfree (objfile->global_psymbols.list); |
78a4a9b9 | 506 | if (objfile->static_psymbols.list) |
2dc74dc1 | 507 | xfree (objfile->static_psymbols.list); |
78a4a9b9 AC |
508 | /* Free the obstacks for non-reusable objfiles */ |
509 | bcache_xfree (objfile->psymbol_cache); | |
510 | bcache_xfree (objfile->macro_cache); | |
511 | if (objfile->demangled_names_hash) | |
512 | htab_delete (objfile->demangled_names_hash); | |
b99607ea | 513 | obstack_free (&objfile->objfile_obstack, 0); |
2dc74dc1 | 514 | xfree (objfile); |
78a4a9b9 | 515 | objfile = NULL; |
bb272892 | 516 | objfiles_changed_p = 1; /* Rebuild section map next time we need it. */ |
c906108c SS |
517 | } |
518 | ||
74b7792f AC |
519 | static void |
520 | do_free_objfile_cleanup (void *obj) | |
521 | { | |
522 | free_objfile (obj); | |
523 | } | |
524 | ||
525 | struct cleanup * | |
526 | make_cleanup_free_objfile (struct objfile *obj) | |
527 | { | |
528 | return make_cleanup (do_free_objfile_cleanup, obj); | |
529 | } | |
c906108c SS |
530 | |
531 | /* Free all the object files at once and clean up their users. */ | |
532 | ||
533 | void | |
fba45db2 | 534 | free_all_objfiles (void) |
c906108c SS |
535 | { |
536 | struct objfile *objfile, *temp; | |
537 | ||
538 | ALL_OBJFILES_SAFE (objfile, temp) | |
c5aa993b JM |
539 | { |
540 | free_objfile (objfile); | |
541 | } | |
c906108c SS |
542 | clear_symtab_users (); |
543 | } | |
544 | \f | |
545 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
546 | entries in new_offsets. */ | |
547 | void | |
fba45db2 | 548 | objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets) |
c906108c | 549 | { |
30510692 | 550 | struct obj_section *s; |
d4f3574e | 551 | struct section_offsets *delta = |
a39a16c4 MM |
552 | ((struct section_offsets *) |
553 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
c906108c SS |
554 | |
555 | { | |
556 | int i; | |
557 | int something_changed = 0; | |
558 | for (i = 0; i < objfile->num_sections; ++i) | |
559 | { | |
a4c8257b | 560 | delta->offsets[i] = |
c906108c SS |
561 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); |
562 | if (ANOFFSET (delta, i) != 0) | |
563 | something_changed = 1; | |
564 | } | |
565 | if (!something_changed) | |
566 | return; | |
567 | } | |
568 | ||
569 | /* OK, get all the symtabs. */ | |
570 | { | |
571 | struct symtab *s; | |
572 | ||
573 | ALL_OBJFILE_SYMTABS (objfile, s) | |
c5aa993b JM |
574 | { |
575 | struct linetable *l; | |
576 | struct blockvector *bv; | |
577 | int i; | |
578 | ||
579 | /* First the line table. */ | |
580 | l = LINETABLE (s); | |
581 | if (l) | |
582 | { | |
583 | for (i = 0; i < l->nitems; ++i) | |
584 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
585 | } | |
c906108c | 586 | |
c5aa993b JM |
587 | /* Don't relocate a shared blockvector more than once. */ |
588 | if (!s->primary) | |
589 | continue; | |
c906108c | 590 | |
c5aa993b | 591 | bv = BLOCKVECTOR (s); |
b101f7a1 UW |
592 | if (BLOCKVECTOR_MAP (bv)) |
593 | addrmap_relocate (BLOCKVECTOR_MAP (bv), | |
594 | ANOFFSET (delta, s->block_line_section)); | |
595 | ||
c5aa993b JM |
596 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) |
597 | { | |
598 | struct block *b; | |
e88c90f2 | 599 | struct symbol *sym; |
de4f826b | 600 | struct dict_iterator iter; |
c5aa993b JM |
601 | |
602 | b = BLOCKVECTOR_BLOCK (bv, i); | |
603 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
604 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); | |
605 | ||
de4f826b | 606 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
c5aa993b | 607 | { |
7a78d0ee KB |
608 | fixup_symbol_section (sym, objfile); |
609 | ||
c5aa993b | 610 | /* The RS6000 code from which this was taken skipped |
176620f1 | 611 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. |
c5aa993b JM |
612 | But I'm leaving out that test, on the theory that |
613 | they can't possibly pass the tests below. */ | |
614 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
0bb4e8c4 | 615 | || SYMBOL_CLASS (sym) == LOC_STATIC) |
c5aa993b JM |
616 | && SYMBOL_SECTION (sym) >= 0) |
617 | { | |
618 | SYMBOL_VALUE_ADDRESS (sym) += | |
619 | ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
620 | } | |
c5aa993b JM |
621 | } |
622 | } | |
623 | } | |
c906108c SS |
624 | } |
625 | ||
626 | { | |
627 | struct partial_symtab *p; | |
628 | ||
629 | ALL_OBJFILE_PSYMTABS (objfile, p) | |
c5aa993b | 630 | { |
b8fbeb18 EZ |
631 | p->textlow += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
632 | p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
c5aa993b | 633 | } |
c906108c SS |
634 | } |
635 | ||
636 | { | |
637 | struct partial_symbol **psym; | |
638 | ||
639 | for (psym = objfile->global_psymbols.list; | |
640 | psym < objfile->global_psymbols.next; | |
641 | psym++) | |
7a78d0ee KB |
642 | { |
643 | fixup_psymbol_section (*psym, objfile); | |
644 | if (SYMBOL_SECTION (*psym) >= 0) | |
645 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, | |
646 | SYMBOL_SECTION (*psym)); | |
647 | } | |
c906108c SS |
648 | for (psym = objfile->static_psymbols.list; |
649 | psym < objfile->static_psymbols.next; | |
650 | psym++) | |
7a78d0ee KB |
651 | { |
652 | fixup_psymbol_section (*psym, objfile); | |
653 | if (SYMBOL_SECTION (*psym) >= 0) | |
654 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, | |
655 | SYMBOL_SECTION (*psym)); | |
656 | } | |
c906108c SS |
657 | } |
658 | ||
659 | { | |
660 | struct minimal_symbol *msym; | |
661 | ALL_OBJFILE_MSYMBOLS (objfile, msym) | |
662 | if (SYMBOL_SECTION (msym) >= 0) | |
c5aa993b | 663 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); |
c906108c SS |
664 | } |
665 | /* Relocating different sections by different amounts may cause the symbols | |
666 | to be out of order. */ | |
667 | msymbols_sort (objfile); | |
668 | ||
36b0c0e0 PS |
669 | if (objfile->ei.entry_point != ~(CORE_ADDR) 0) |
670 | { | |
671 | /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT | |
672 | only as a fallback. */ | |
673 | struct obj_section *s; | |
674 | s = find_pc_section (objfile->ei.entry_point); | |
675 | if (s) | |
676 | objfile->ei.entry_point += ANOFFSET (delta, s->the_bfd_section->index); | |
677 | else | |
678 | objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
679 | } | |
680 | ||
f1f2b5f4 PA |
681 | { |
682 | int i; | |
683 | for (i = 0; i < objfile->num_sections; ++i) | |
684 | (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); | |
685 | } | |
686 | ||
687 | /* Rebuild section map next time we need it. */ | |
688 | objfiles_changed_p = 1; | |
689 | ||
30510692 DJ |
690 | /* Update the table in exec_ops, used to read memory. */ |
691 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
692 | { | |
693 | int idx = s->the_bfd_section->index; | |
694 | ||
695 | exec_set_section_address (bfd_get_filename (objfile->obfd), idx, | |
f1f6aadf | 696 | obj_section_addr (s)); |
30510692 DJ |
697 | } |
698 | ||
c906108c | 699 | /* Relocate breakpoints as necessary, after things are relocated. */ |
69de3c6a | 700 | breakpoint_re_set (); |
c906108c SS |
701 | } |
702 | \f | |
55333a84 DE |
703 | /* Return non-zero if OBJFILE has partial symbols. */ |
704 | ||
705 | int | |
706 | objfile_has_partial_symbols (struct objfile *objfile) | |
707 | { | |
708 | return objfile->psymtabs != NULL; | |
709 | } | |
710 | ||
711 | /* Return non-zero if OBJFILE has full symbols. */ | |
712 | ||
713 | int | |
714 | objfile_has_full_symbols (struct objfile *objfile) | |
715 | { | |
716 | return objfile->symtabs != NULL; | |
717 | } | |
718 | ||
c906108c SS |
719 | /* Many places in gdb want to test just to see if we have any partial |
720 | symbols available. This function returns zero if none are currently | |
721 | available, nonzero otherwise. */ | |
722 | ||
723 | int | |
fba45db2 | 724 | have_partial_symbols (void) |
c906108c SS |
725 | { |
726 | struct objfile *ofp; | |
727 | ||
728 | ALL_OBJFILES (ofp) | |
c5aa993b | 729 | { |
55333a84 DE |
730 | if (objfile_has_partial_symbols (ofp)) |
731 | return 1; | |
c5aa993b | 732 | } |
c906108c SS |
733 | return 0; |
734 | } | |
735 | ||
736 | /* Many places in gdb want to test just to see if we have any full | |
737 | symbols available. This function returns zero if none are currently | |
738 | available, nonzero otherwise. */ | |
739 | ||
740 | int | |
fba45db2 | 741 | have_full_symbols (void) |
c906108c SS |
742 | { |
743 | struct objfile *ofp; | |
744 | ||
745 | ALL_OBJFILES (ofp) | |
c5aa993b | 746 | { |
55333a84 DE |
747 | if (objfile_has_full_symbols (ofp)) |
748 | return 1; | |
c5aa993b | 749 | } |
c906108c SS |
750 | return 0; |
751 | } | |
752 | ||
753 | ||
754 | /* This operations deletes all objfile entries that represent solibs that | |
755 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
756 | command. | |
c5aa993b | 757 | */ |
c906108c | 758 | void |
fba45db2 | 759 | objfile_purge_solibs (void) |
c906108c | 760 | { |
c5aa993b JM |
761 | struct objfile *objf; |
762 | struct objfile *temp; | |
c906108c SS |
763 | |
764 | ALL_OBJFILES_SAFE (objf, temp) | |
765 | { | |
766 | /* We assume that the solib package has been purged already, or will | |
767 | be soon. | |
c5aa993b | 768 | */ |
2df3850c | 769 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
c906108c SS |
770 | free_objfile (objf); |
771 | } | |
772 | } | |
773 | ||
774 | ||
775 | /* Many places in gdb want to test just to see if we have any minimal | |
776 | symbols available. This function returns zero if none are currently | |
777 | available, nonzero otherwise. */ | |
778 | ||
779 | int | |
fba45db2 | 780 | have_minimal_symbols (void) |
c906108c SS |
781 | { |
782 | struct objfile *ofp; | |
783 | ||
784 | ALL_OBJFILES (ofp) | |
c5aa993b | 785 | { |
15831452 | 786 | if (ofp->minimal_symbol_count > 0) |
c5aa993b JM |
787 | { |
788 | return 1; | |
789 | } | |
790 | } | |
c906108c SS |
791 | return 0; |
792 | } | |
793 | ||
a845f5cb PP |
794 | /* Qsort comparison function. */ |
795 | ||
796 | static int | |
797 | qsort_cmp (const void *a, const void *b) | |
798 | { | |
799 | const struct obj_section *sect1 = *(const struct obj_section **) a; | |
800 | const struct obj_section *sect2 = *(const struct obj_section **) b; | |
801 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
802 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
803 | ||
804 | if (sect1_addr < sect2_addr) | |
805 | { | |
806 | gdb_assert (obj_section_endaddr (sect1) <= sect2_addr); | |
807 | return -1; | |
808 | } | |
809 | else if (sect1_addr > sect2_addr) | |
810 | { | |
811 | gdb_assert (sect1_addr >= obj_section_endaddr (sect2)); | |
812 | return 1; | |
813 | } | |
a845f5cb PP |
814 | |
815 | return 0; | |
816 | } | |
817 | ||
3aad21cf PP |
818 | /* Select "better" obj_section to keep. We prefer the one that came from |
819 | the real object, rather than the one from separate debuginfo. | |
820 | Most of the time the two sections are exactly identical, but with | |
821 | prelinking the .rel.dyn section in the real object may have different | |
822 | size. */ | |
823 | ||
824 | static struct obj_section * | |
825 | preferred_obj_section (struct obj_section *a, struct obj_section *b) | |
826 | { | |
827 | gdb_assert (obj_section_addr (a) == obj_section_addr (b)); | |
828 | gdb_assert ((a->objfile->separate_debug_objfile == b->objfile) | |
829 | || (b->objfile->separate_debug_objfile == a->objfile)); | |
830 | gdb_assert ((a->objfile->separate_debug_objfile_backlink == b->objfile) | |
831 | || (b->objfile->separate_debug_objfile_backlink == a->objfile)); | |
832 | ||
833 | if (a->objfile->separate_debug_objfile != NULL) | |
834 | return a; | |
835 | return b; | |
836 | } | |
837 | ||
a845f5cb PP |
838 | /* Update PMAP, PMAP_SIZE with non-TLS sections from all objfiles. */ |
839 | ||
840 | static void | |
841 | update_section_map (struct obj_section ***pmap, int *pmap_size) | |
842 | { | |
3aad21cf | 843 | int map_size, i, j; |
a845f5cb PP |
844 | struct obj_section *s, **map; |
845 | struct objfile *objfile; | |
846 | ||
bb272892 | 847 | gdb_assert (objfiles_changed_p != 0); |
a845f5cb PP |
848 | |
849 | map = *pmap; | |
850 | xfree (map); | |
851 | ||
852 | #define insert_p(objf, sec) \ | |
853 | ((bfd_get_section_flags ((objf)->obfd, (sec)->the_bfd_section) \ | |
854 | & SEC_THREAD_LOCAL) == 0) | |
855 | ||
856 | map_size = 0; | |
857 | ALL_OBJSECTIONS (objfile, s) | |
858 | if (insert_p (objfile, s)) | |
859 | map_size += 1; | |
860 | ||
861 | map = xmalloc (map_size * sizeof (*map)); | |
862 | ||
3aad21cf | 863 | i = 0; |
a845f5cb PP |
864 | ALL_OBJSECTIONS (objfile, s) |
865 | if (insert_p (objfile, s)) | |
3aad21cf | 866 | map[i++] = s; |
a845f5cb PP |
867 | |
868 | #undef insert_p | |
869 | ||
870 | qsort (map, map_size, sizeof (*map), qsort_cmp); | |
871 | ||
3aad21cf PP |
872 | /* With separate debuginfo files, we may have up to two (almost) |
873 | identical copies of some obj_sections in the map. | |
874 | Filter out duplicates. */ | |
875 | for (i = 0, j = 0; i < map_size; ++i) | |
876 | { | |
877 | struct obj_section *sect1 = map[i]; | |
878 | struct obj_section *sect2 = (i + 1 < map_size) ? map[i + 1] : NULL; | |
879 | ||
880 | if (sect2 == NULL | |
881 | || obj_section_addr (sect1) != obj_section_addr (sect2)) | |
882 | map[j++] = sect1; | |
883 | else | |
884 | { | |
885 | map[j++] = preferred_obj_section (sect1, sect2); | |
886 | ++i; | |
887 | } | |
888 | } | |
889 | ||
890 | if (j < map_size) | |
891 | { | |
892 | /* Some duplicates were eliminated. | |
893 | The new size shouldn't be less than half of the original. */ | |
894 | gdb_assert (map_size / 2 <= j); | |
895 | map_size = j; | |
896 | ||
897 | map = xrealloc (map, map_size * sizeof (*map)); /* Trim excess space. */ | |
898 | } | |
899 | else | |
900 | gdb_assert (j == map_size); | |
901 | ||
a845f5cb PP |
902 | *pmap = map; |
903 | *pmap_size = map_size; | |
904 | } | |
905 | ||
906 | /* Bsearch comparison function. */ | |
907 | ||
908 | static int | |
909 | bsearch_cmp (const void *key, const void *elt) | |
910 | { | |
911 | const CORE_ADDR pc = *(CORE_ADDR *) key; | |
912 | const struct obj_section *section = *(const struct obj_section **) elt; | |
913 | ||
914 | if (pc < obj_section_addr (section)) | |
915 | return -1; | |
916 | if (pc < obj_section_endaddr (section)) | |
917 | return 0; | |
918 | return 1; | |
919 | } | |
920 | ||
714835d5 | 921 | /* Returns a section whose range includes PC or NULL if none found. */ |
c906108c SS |
922 | |
923 | struct obj_section * | |
714835d5 | 924 | find_pc_section (CORE_ADDR pc) |
c906108c | 925 | { |
a845f5cb PP |
926 | static struct obj_section **sections; |
927 | static int num_sections; | |
928 | ||
929 | struct obj_section *s, **sp; | |
c5aa993b | 930 | |
714835d5 UW |
931 | /* Check for mapped overlay section first. */ |
932 | s = find_pc_mapped_section (pc); | |
933 | if (s) | |
934 | return s; | |
c906108c | 935 | |
bb272892 | 936 | if (objfiles_changed_p != 0) |
a845f5cb PP |
937 | { |
938 | update_section_map (§ions, &num_sections); | |
c906108c | 939 | |
a845f5cb PP |
940 | /* Don't need updates to section map until objfiles are added |
941 | or removed. */ | |
bb272892 | 942 | objfiles_changed_p = 0; |
a845f5cb PP |
943 | } |
944 | ||
945 | sp = (struct obj_section **) bsearch (&pc, sections, num_sections, | |
946 | sizeof (*sections), bsearch_cmp); | |
947 | if (sp != NULL) | |
948 | return *sp; | |
714835d5 | 949 | return NULL; |
c906108c | 950 | } |
c5aa993b | 951 | |
c906108c SS |
952 | |
953 | /* In SVR4, we recognize a trampoline by it's section name. | |
954 | That is, if the pc is in a section named ".plt" then we are in | |
955 | a trampoline. */ | |
956 | ||
957 | int | |
fba45db2 | 958 | in_plt_section (CORE_ADDR pc, char *name) |
c906108c SS |
959 | { |
960 | struct obj_section *s; | |
961 | int retval = 0; | |
c5aa993b JM |
962 | |
963 | s = find_pc_section (pc); | |
964 | ||
c906108c SS |
965 | retval = (s != NULL |
966 | && s->the_bfd_section->name != NULL | |
6314a349 | 967 | && strcmp (s->the_bfd_section->name, ".plt") == 0); |
c5aa993b | 968 | return (retval); |
c906108c | 969 | } |
0d0e1a63 MK |
970 | \f |
971 | ||
972 | /* Keep a registry of per-objfile data-pointers required by other GDB | |
973 | modules. */ | |
974 | ||
975 | struct objfile_data | |
976 | { | |
977 | unsigned index; | |
c1bd65d0 DE |
978 | void (*save) (struct objfile *, void *); |
979 | void (*free) (struct objfile *, void *); | |
0d0e1a63 MK |
980 | }; |
981 | ||
982 | struct objfile_data_registration | |
983 | { | |
984 | struct objfile_data *data; | |
985 | struct objfile_data_registration *next; | |
986 | }; | |
987 | ||
988 | struct objfile_data_registry | |
989 | { | |
990 | struct objfile_data_registration *registrations; | |
991 | unsigned num_registrations; | |
992 | }; | |
993 | ||
994 | static struct objfile_data_registry objfile_data_registry = { NULL, 0 }; | |
995 | ||
996 | const struct objfile_data * | |
c1bd65d0 DE |
997 | register_objfile_data_with_cleanup (void (*save) (struct objfile *, void *), |
998 | void (*free) (struct objfile *, void *)) | |
0d0e1a63 MK |
999 | { |
1000 | struct objfile_data_registration **curr; | |
1001 | ||
1002 | /* Append new registration. */ | |
1003 | for (curr = &objfile_data_registry.registrations; | |
1004 | *curr != NULL; curr = &(*curr)->next); | |
7be570e7 | 1005 | |
0d0e1a63 MK |
1006 | *curr = XMALLOC (struct objfile_data_registration); |
1007 | (*curr)->next = NULL; | |
1008 | (*curr)->data = XMALLOC (struct objfile_data); | |
1009 | (*curr)->data->index = objfile_data_registry.num_registrations++; | |
c1bd65d0 DE |
1010 | (*curr)->data->save = save; |
1011 | (*curr)->data->free = free; | |
0d0e1a63 MK |
1012 | |
1013 | return (*curr)->data; | |
1014 | } | |
1015 | ||
60c5725c DJ |
1016 | const struct objfile_data * |
1017 | register_objfile_data (void) | |
1018 | { | |
c1bd65d0 | 1019 | return register_objfile_data_with_cleanup (NULL, NULL); |
60c5725c DJ |
1020 | } |
1021 | ||
0d0e1a63 MK |
1022 | static void |
1023 | objfile_alloc_data (struct objfile *objfile) | |
1024 | { | |
1025 | gdb_assert (objfile->data == NULL); | |
1026 | objfile->num_data = objfile_data_registry.num_registrations; | |
1027 | objfile->data = XCALLOC (objfile->num_data, void *); | |
1028 | } | |
1029 | ||
1030 | static void | |
1031 | objfile_free_data (struct objfile *objfile) | |
1032 | { | |
1033 | gdb_assert (objfile->data != NULL); | |
60c5725c | 1034 | clear_objfile_data (objfile); |
0d0e1a63 MK |
1035 | xfree (objfile->data); |
1036 | objfile->data = NULL; | |
1037 | } | |
1038 | ||
7b097ae3 MK |
1039 | void |
1040 | clear_objfile_data (struct objfile *objfile) | |
1041 | { | |
60c5725c DJ |
1042 | struct objfile_data_registration *registration; |
1043 | int i; | |
1044 | ||
7b097ae3 | 1045 | gdb_assert (objfile->data != NULL); |
60c5725c | 1046 | |
c1bd65d0 DE |
1047 | /* Process all the save handlers. */ |
1048 | ||
1049 | for (registration = objfile_data_registry.registrations, i = 0; | |
1050 | i < objfile->num_data; | |
1051 | registration = registration->next, i++) | |
1052 | if (objfile->data[i] != NULL && registration->data->save != NULL) | |
1053 | registration->data->save (objfile, objfile->data[i]); | |
1054 | ||
1055 | /* Now process all the free handlers. */ | |
1056 | ||
60c5725c DJ |
1057 | for (registration = objfile_data_registry.registrations, i = 0; |
1058 | i < objfile->num_data; | |
1059 | registration = registration->next, i++) | |
c1bd65d0 DE |
1060 | if (objfile->data[i] != NULL && registration->data->free != NULL) |
1061 | registration->data->free (objfile, objfile->data[i]); | |
60c5725c | 1062 | |
7b097ae3 MK |
1063 | memset (objfile->data, 0, objfile->num_data * sizeof (void *)); |
1064 | } | |
1065 | ||
0d0e1a63 MK |
1066 | void |
1067 | set_objfile_data (struct objfile *objfile, const struct objfile_data *data, | |
1068 | void *value) | |
1069 | { | |
1070 | gdb_assert (data->index < objfile->num_data); | |
1071 | objfile->data[data->index] = value; | |
1072 | } | |
1073 | ||
1074 | void * | |
1075 | objfile_data (struct objfile *objfile, const struct objfile_data *data) | |
1076 | { | |
1077 | gdb_assert (data->index < objfile->num_data); | |
1078 | return objfile->data[data->index]; | |
1079 | } | |
a845f5cb | 1080 | |
bb272892 PP |
1081 | /* Set objfiles_changed_p so section map will be rebuilt next time it |
1082 | is used. Called by reread_symbols. */ | |
a845f5cb PP |
1083 | |
1084 | void | |
bb272892 | 1085 | objfiles_changed (void) |
a845f5cb | 1086 | { |
bb272892 | 1087 | objfiles_changed_p = 1; /* Rebuild section map next time we need it. */ |
a845f5cb | 1088 | } |
e3c69974 | 1089 | |
3db741ef PP |
1090 | /* Add reference to ABFD. Returns ABFD. */ |
1091 | struct bfd * | |
1092 | gdb_bfd_ref (struct bfd *abfd) | |
1093 | { | |
1094 | int *p_refcount = bfd_usrdata (abfd); | |
1095 | ||
1096 | if (p_refcount != NULL) | |
1097 | { | |
1098 | *p_refcount += 1; | |
1099 | return abfd; | |
1100 | } | |
1101 | ||
1102 | p_refcount = xmalloc (sizeof (*p_refcount)); | |
1103 | *p_refcount = 1; | |
1104 | bfd_usrdata (abfd) = p_refcount; | |
1105 | ||
1106 | return abfd; | |
1107 | } | |
1108 | ||
1109 | /* Unreference and possibly close ABFD. */ | |
e3c69974 PP |
1110 | void |
1111 | gdb_bfd_unref (struct bfd *abfd) | |
1112 | { | |
1113 | int *p_refcount; | |
1114 | char *name; | |
1115 | ||
1116 | if (abfd == NULL) | |
1117 | return; | |
1118 | ||
4f6f9936 | 1119 | p_refcount = bfd_usrdata (abfd); |
e3c69974 | 1120 | |
3db741ef PP |
1121 | /* Valid range for p_refcount: a pointer to int counter, which has a |
1122 | value of 1 (single owner) or 2 (shared). */ | |
1123 | gdb_assert (*p_refcount == 1 || *p_refcount == 2); | |
1124 | ||
1125 | *p_refcount -= 1; | |
1126 | if (*p_refcount > 0) | |
1127 | return; | |
e3c69974 | 1128 | |
e3c69974 | 1129 | xfree (p_refcount); |
4f6f9936 | 1130 | bfd_usrdata (abfd) = NULL; /* Paranoia. */ |
e3c69974 PP |
1131 | |
1132 | name = bfd_get_filename (abfd); | |
1133 | if (!bfd_close (abfd)) | |
1134 | warning (_("cannot close \"%s\": %s"), | |
1135 | name, bfd_errmsg (bfd_get_error ())); | |
1136 | xfree (name); | |
1137 | } |