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 | ||
c5aa993b JM |
184 | objfile->obfd = abfd; |
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 | ||
572d275c | 455 | /* We always close the bfd, unless the OBJF_KEEPBFD flag is set. */ |
c906108c | 456 | |
572d275c | 457 | if (objfile->obfd != NULL && !(objfile->flags & OBJF_KEEPBFD)) |
c906108c SS |
458 | { |
459 | char *name = bfd_get_filename (objfile->obfd); | |
c5aa993b | 460 | if (!bfd_close (objfile->obfd)) |
8a3fe4f8 | 461 | warning (_("cannot close \"%s\": %s"), |
c906108c | 462 | name, bfd_errmsg (bfd_get_error ())); |
b8c9b27d | 463 | xfree (name); |
c906108c SS |
464 | } |
465 | ||
466 | /* Remove it from the chain of all objfiles. */ | |
467 | ||
468 | unlink_objfile (objfile); | |
469 | ||
470 | /* If we are going to free the runtime common objfile, mark it | |
471 | as unallocated. */ | |
472 | ||
473 | if (objfile == rt_common_objfile) | |
474 | rt_common_objfile = NULL; | |
475 | ||
476 | /* Before the symbol table code was redone to make it easier to | |
477 | selectively load and remove information particular to a specific | |
478 | linkage unit, gdb used to do these things whenever the monolithic | |
479 | symbol table was blown away. How much still needs to be done | |
480 | is unknown, but we play it safe for now and keep each action until | |
481 | it is shown to be no longer needed. */ | |
c5aa993b | 482 | |
cb5d864f FF |
483 | /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
484 | for example), so we need to call this here. */ | |
c906108c SS |
485 | clear_pc_function_cache (); |
486 | ||
9bdcbae7 DJ |
487 | /* Clear globals which might have pointed into a removed objfile. |
488 | FIXME: It's not clear which of these are supposed to persist | |
489 | between expressions and which ought to be reset each time. */ | |
490 | expression_context_block = NULL; | |
491 | innermost_block = NULL; | |
492 | ||
cb5d864f FF |
493 | /* Check to see if the current_source_symtab belongs to this objfile, |
494 | and if so, call clear_current_source_symtab_and_line. */ | |
495 | ||
496 | { | |
497 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
498 | struct symtab *s; | |
499 | ||
500 | ALL_OBJFILE_SYMTABS (objfile, s) | |
501 | { | |
502 | if (s == cursal.symtab) | |
503 | clear_current_source_symtab_and_line (); | |
504 | } | |
505 | } | |
506 | ||
78a4a9b9 | 507 | /* The last thing we do is free the objfile struct itself. */ |
c906108c | 508 | |
78a4a9b9 | 509 | if (objfile->name != NULL) |
c906108c | 510 | { |
2dc74dc1 | 511 | xfree (objfile->name); |
c906108c | 512 | } |
78a4a9b9 | 513 | if (objfile->global_psymbols.list) |
2dc74dc1 | 514 | xfree (objfile->global_psymbols.list); |
78a4a9b9 | 515 | if (objfile->static_psymbols.list) |
2dc74dc1 | 516 | xfree (objfile->static_psymbols.list); |
78a4a9b9 AC |
517 | /* Free the obstacks for non-reusable objfiles */ |
518 | bcache_xfree (objfile->psymbol_cache); | |
519 | bcache_xfree (objfile->macro_cache); | |
520 | if (objfile->demangled_names_hash) | |
521 | htab_delete (objfile->demangled_names_hash); | |
b99607ea | 522 | obstack_free (&objfile->objfile_obstack, 0); |
2dc74dc1 | 523 | xfree (objfile); |
78a4a9b9 | 524 | objfile = NULL; |
bb272892 | 525 | objfiles_changed_p = 1; /* Rebuild section map next time we need it. */ |
c906108c SS |
526 | } |
527 | ||
74b7792f AC |
528 | static void |
529 | do_free_objfile_cleanup (void *obj) | |
530 | { | |
531 | free_objfile (obj); | |
532 | } | |
533 | ||
534 | struct cleanup * | |
535 | make_cleanup_free_objfile (struct objfile *obj) | |
536 | { | |
537 | return make_cleanup (do_free_objfile_cleanup, obj); | |
538 | } | |
c906108c SS |
539 | |
540 | /* Free all the object files at once and clean up their users. */ | |
541 | ||
542 | void | |
fba45db2 | 543 | free_all_objfiles (void) |
c906108c SS |
544 | { |
545 | struct objfile *objfile, *temp; | |
546 | ||
547 | ALL_OBJFILES_SAFE (objfile, temp) | |
c5aa993b JM |
548 | { |
549 | free_objfile (objfile); | |
550 | } | |
c906108c SS |
551 | clear_symtab_users (); |
552 | } | |
553 | \f | |
554 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
555 | entries in new_offsets. */ | |
556 | void | |
fba45db2 | 557 | objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets) |
c906108c | 558 | { |
30510692 | 559 | struct obj_section *s; |
d4f3574e | 560 | struct section_offsets *delta = |
a39a16c4 MM |
561 | ((struct section_offsets *) |
562 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
c906108c SS |
563 | |
564 | { | |
565 | int i; | |
566 | int something_changed = 0; | |
567 | for (i = 0; i < objfile->num_sections; ++i) | |
568 | { | |
a4c8257b | 569 | delta->offsets[i] = |
c906108c SS |
570 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); |
571 | if (ANOFFSET (delta, i) != 0) | |
572 | something_changed = 1; | |
573 | } | |
574 | if (!something_changed) | |
575 | return; | |
576 | } | |
577 | ||
578 | /* OK, get all the symtabs. */ | |
579 | { | |
580 | struct symtab *s; | |
581 | ||
582 | ALL_OBJFILE_SYMTABS (objfile, s) | |
c5aa993b JM |
583 | { |
584 | struct linetable *l; | |
585 | struct blockvector *bv; | |
586 | int i; | |
587 | ||
588 | /* First the line table. */ | |
589 | l = LINETABLE (s); | |
590 | if (l) | |
591 | { | |
592 | for (i = 0; i < l->nitems; ++i) | |
593 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
594 | } | |
c906108c | 595 | |
c5aa993b JM |
596 | /* Don't relocate a shared blockvector more than once. */ |
597 | if (!s->primary) | |
598 | continue; | |
c906108c | 599 | |
c5aa993b | 600 | bv = BLOCKVECTOR (s); |
b101f7a1 UW |
601 | if (BLOCKVECTOR_MAP (bv)) |
602 | addrmap_relocate (BLOCKVECTOR_MAP (bv), | |
603 | ANOFFSET (delta, s->block_line_section)); | |
604 | ||
c5aa993b JM |
605 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) |
606 | { | |
607 | struct block *b; | |
e88c90f2 | 608 | struct symbol *sym; |
de4f826b | 609 | struct dict_iterator iter; |
c5aa993b JM |
610 | |
611 | b = BLOCKVECTOR_BLOCK (bv, i); | |
612 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
613 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); | |
614 | ||
de4f826b | 615 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
c5aa993b | 616 | { |
7a78d0ee KB |
617 | fixup_symbol_section (sym, objfile); |
618 | ||
c5aa993b | 619 | /* The RS6000 code from which this was taken skipped |
176620f1 | 620 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. |
c5aa993b JM |
621 | But I'm leaving out that test, on the theory that |
622 | they can't possibly pass the tests below. */ | |
623 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
0bb4e8c4 | 624 | || SYMBOL_CLASS (sym) == LOC_STATIC) |
c5aa993b JM |
625 | && SYMBOL_SECTION (sym) >= 0) |
626 | { | |
627 | SYMBOL_VALUE_ADDRESS (sym) += | |
628 | ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
629 | } | |
c5aa993b JM |
630 | } |
631 | } | |
632 | } | |
c906108c SS |
633 | } |
634 | ||
635 | { | |
636 | struct partial_symtab *p; | |
637 | ||
638 | ALL_OBJFILE_PSYMTABS (objfile, p) | |
c5aa993b | 639 | { |
b8fbeb18 EZ |
640 | p->textlow += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
641 | p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
c5aa993b | 642 | } |
c906108c SS |
643 | } |
644 | ||
645 | { | |
646 | struct partial_symbol **psym; | |
647 | ||
648 | for (psym = objfile->global_psymbols.list; | |
649 | psym < objfile->global_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 | for (psym = objfile->static_psymbols.list; |
658 | psym < objfile->static_psymbols.next; | |
659 | psym++) | |
7a78d0ee KB |
660 | { |
661 | fixup_psymbol_section (*psym, objfile); | |
662 | if (SYMBOL_SECTION (*psym) >= 0) | |
663 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, | |
664 | SYMBOL_SECTION (*psym)); | |
665 | } | |
c906108c SS |
666 | } |
667 | ||
668 | { | |
669 | struct minimal_symbol *msym; | |
670 | ALL_OBJFILE_MSYMBOLS (objfile, msym) | |
671 | if (SYMBOL_SECTION (msym) >= 0) | |
c5aa993b | 672 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); |
c906108c SS |
673 | } |
674 | /* Relocating different sections by different amounts may cause the symbols | |
675 | to be out of order. */ | |
676 | msymbols_sort (objfile); | |
677 | ||
678 | { | |
679 | int i; | |
680 | for (i = 0; i < objfile->num_sections; ++i) | |
a4c8257b | 681 | (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); |
c906108c SS |
682 | } |
683 | ||
36b0c0e0 PS |
684 | if (objfile->ei.entry_point != ~(CORE_ADDR) 0) |
685 | { | |
686 | /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT | |
687 | only as a fallback. */ | |
688 | struct obj_section *s; | |
689 | s = find_pc_section (objfile->ei.entry_point); | |
690 | if (s) | |
691 | objfile->ei.entry_point += ANOFFSET (delta, s->the_bfd_section->index); | |
692 | else | |
693 | objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
694 | } | |
695 | ||
30510692 DJ |
696 | /* Update the table in exec_ops, used to read memory. */ |
697 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
698 | { | |
699 | int idx = s->the_bfd_section->index; | |
700 | ||
701 | exec_set_section_address (bfd_get_filename (objfile->obfd), idx, | |
f1f6aadf | 702 | obj_section_addr (s)); |
30510692 DJ |
703 | } |
704 | ||
c906108c | 705 | /* Relocate breakpoints as necessary, after things are relocated. */ |
69de3c6a | 706 | breakpoint_re_set (); |
bb272892 | 707 | objfiles_changed_p = 1; /* Rebuild section map next time we need it. */ |
c906108c SS |
708 | } |
709 | \f | |
710 | /* Many places in gdb want to test just to see if we have any partial | |
711 | symbols available. This function returns zero if none are currently | |
712 | available, nonzero otherwise. */ | |
713 | ||
714 | int | |
fba45db2 | 715 | have_partial_symbols (void) |
c906108c SS |
716 | { |
717 | struct objfile *ofp; | |
718 | ||
719 | ALL_OBJFILES (ofp) | |
c5aa993b JM |
720 | { |
721 | if (ofp->psymtabs != NULL) | |
722 | { | |
723 | return 1; | |
724 | } | |
725 | } | |
c906108c SS |
726 | return 0; |
727 | } | |
728 | ||
729 | /* Many places in gdb want to test just to see if we have any full | |
730 | symbols available. This function returns zero if none are currently | |
731 | available, nonzero otherwise. */ | |
732 | ||
733 | int | |
fba45db2 | 734 | have_full_symbols (void) |
c906108c SS |
735 | { |
736 | struct objfile *ofp; | |
737 | ||
738 | ALL_OBJFILES (ofp) | |
c5aa993b JM |
739 | { |
740 | if (ofp->symtabs != NULL) | |
741 | { | |
742 | return 1; | |
743 | } | |
744 | } | |
c906108c SS |
745 | return 0; |
746 | } | |
747 | ||
748 | ||
749 | /* This operations deletes all objfile entries that represent solibs that | |
750 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
751 | command. | |
c5aa993b | 752 | */ |
c906108c | 753 | void |
fba45db2 | 754 | objfile_purge_solibs (void) |
c906108c | 755 | { |
c5aa993b JM |
756 | struct objfile *objf; |
757 | struct objfile *temp; | |
c906108c SS |
758 | |
759 | ALL_OBJFILES_SAFE (objf, temp) | |
760 | { | |
761 | /* We assume that the solib package has been purged already, or will | |
762 | be soon. | |
c5aa993b | 763 | */ |
2df3850c | 764 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
c906108c SS |
765 | free_objfile (objf); |
766 | } | |
767 | } | |
768 | ||
769 | ||
770 | /* Many places in gdb want to test just to see if we have any minimal | |
771 | symbols available. This function returns zero if none are currently | |
772 | available, nonzero otherwise. */ | |
773 | ||
774 | int | |
fba45db2 | 775 | have_minimal_symbols (void) |
c906108c SS |
776 | { |
777 | struct objfile *ofp; | |
778 | ||
779 | ALL_OBJFILES (ofp) | |
c5aa993b | 780 | { |
15831452 | 781 | if (ofp->minimal_symbol_count > 0) |
c5aa993b JM |
782 | { |
783 | return 1; | |
784 | } | |
785 | } | |
c906108c SS |
786 | return 0; |
787 | } | |
788 | ||
a845f5cb PP |
789 | /* Qsort comparison function. */ |
790 | ||
791 | static int | |
792 | qsort_cmp (const void *a, const void *b) | |
793 | { | |
794 | const struct obj_section *sect1 = *(const struct obj_section **) a; | |
795 | const struct obj_section *sect2 = *(const struct obj_section **) b; | |
796 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
797 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
798 | ||
799 | if (sect1_addr < sect2_addr) | |
800 | { | |
801 | gdb_assert (obj_section_endaddr (sect1) <= sect2_addr); | |
802 | return -1; | |
803 | } | |
804 | else if (sect1_addr > sect2_addr) | |
805 | { | |
806 | gdb_assert (sect1_addr >= obj_section_endaddr (sect2)); | |
807 | return 1; | |
808 | } | |
809 | /* This can happen for separate debug-info files. */ | |
810 | gdb_assert (obj_section_endaddr (sect1) == obj_section_endaddr (sect2)); | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
815 | /* Update PMAP, PMAP_SIZE with non-TLS sections from all objfiles. */ | |
816 | ||
817 | static void | |
818 | update_section_map (struct obj_section ***pmap, int *pmap_size) | |
819 | { | |
820 | int map_size, idx; | |
821 | struct obj_section *s, **map; | |
822 | struct objfile *objfile; | |
823 | ||
bb272892 | 824 | gdb_assert (objfiles_changed_p != 0); |
a845f5cb PP |
825 | |
826 | map = *pmap; | |
827 | xfree (map); | |
828 | ||
829 | #define insert_p(objf, sec) \ | |
830 | ((bfd_get_section_flags ((objf)->obfd, (sec)->the_bfd_section) \ | |
831 | & SEC_THREAD_LOCAL) == 0) | |
832 | ||
833 | map_size = 0; | |
834 | ALL_OBJSECTIONS (objfile, s) | |
835 | if (insert_p (objfile, s)) | |
836 | map_size += 1; | |
837 | ||
838 | map = xmalloc (map_size * sizeof (*map)); | |
839 | ||
840 | idx = 0; | |
841 | ALL_OBJSECTIONS (objfile, s) | |
842 | if (insert_p (objfile, s)) | |
843 | map[idx++] = s; | |
844 | ||
845 | #undef insert_p | |
846 | ||
847 | qsort (map, map_size, sizeof (*map), qsort_cmp); | |
848 | ||
849 | *pmap = map; | |
850 | *pmap_size = map_size; | |
851 | } | |
852 | ||
853 | /* Bsearch comparison function. */ | |
854 | ||
855 | static int | |
856 | bsearch_cmp (const void *key, const void *elt) | |
857 | { | |
858 | const CORE_ADDR pc = *(CORE_ADDR *) key; | |
859 | const struct obj_section *section = *(const struct obj_section **) elt; | |
860 | ||
861 | if (pc < obj_section_addr (section)) | |
862 | return -1; | |
863 | if (pc < obj_section_endaddr (section)) | |
864 | return 0; | |
865 | return 1; | |
866 | } | |
867 | ||
714835d5 | 868 | /* Returns a section whose range includes PC or NULL if none found. */ |
c906108c SS |
869 | |
870 | struct obj_section * | |
714835d5 | 871 | find_pc_section (CORE_ADDR pc) |
c906108c | 872 | { |
a845f5cb PP |
873 | static struct obj_section **sections; |
874 | static int num_sections; | |
875 | ||
876 | struct obj_section *s, **sp; | |
c5aa993b | 877 | |
714835d5 UW |
878 | /* Check for mapped overlay section first. */ |
879 | s = find_pc_mapped_section (pc); | |
880 | if (s) | |
881 | return s; | |
c906108c | 882 | |
bb272892 | 883 | if (objfiles_changed_p != 0) |
a845f5cb PP |
884 | { |
885 | update_section_map (§ions, &num_sections); | |
c906108c | 886 | |
a845f5cb PP |
887 | /* Don't need updates to section map until objfiles are added |
888 | or removed. */ | |
bb272892 | 889 | objfiles_changed_p = 0; |
a845f5cb PP |
890 | } |
891 | ||
892 | sp = (struct obj_section **) bsearch (&pc, sections, num_sections, | |
893 | sizeof (*sections), bsearch_cmp); | |
894 | if (sp != NULL) | |
895 | return *sp; | |
714835d5 | 896 | return NULL; |
c906108c | 897 | } |
c5aa993b | 898 | |
c906108c SS |
899 | |
900 | /* In SVR4, we recognize a trampoline by it's section name. | |
901 | That is, if the pc is in a section named ".plt" then we are in | |
902 | a trampoline. */ | |
903 | ||
904 | int | |
fba45db2 | 905 | in_plt_section (CORE_ADDR pc, char *name) |
c906108c SS |
906 | { |
907 | struct obj_section *s; | |
908 | int retval = 0; | |
c5aa993b JM |
909 | |
910 | s = find_pc_section (pc); | |
911 | ||
c906108c SS |
912 | retval = (s != NULL |
913 | && s->the_bfd_section->name != NULL | |
6314a349 | 914 | && strcmp (s->the_bfd_section->name, ".plt") == 0); |
c5aa993b | 915 | return (retval); |
c906108c | 916 | } |
0d0e1a63 MK |
917 | \f |
918 | ||
919 | /* Keep a registry of per-objfile data-pointers required by other GDB | |
920 | modules. */ | |
921 | ||
922 | struct objfile_data | |
923 | { | |
924 | unsigned index; | |
60c5725c | 925 | void (*cleanup) (struct objfile *, void *); |
0d0e1a63 MK |
926 | }; |
927 | ||
928 | struct objfile_data_registration | |
929 | { | |
930 | struct objfile_data *data; | |
931 | struct objfile_data_registration *next; | |
932 | }; | |
933 | ||
934 | struct objfile_data_registry | |
935 | { | |
936 | struct objfile_data_registration *registrations; | |
937 | unsigned num_registrations; | |
938 | }; | |
939 | ||
940 | static struct objfile_data_registry objfile_data_registry = { NULL, 0 }; | |
941 | ||
942 | const struct objfile_data * | |
60c5725c | 943 | register_objfile_data_with_cleanup (void (*cleanup) (struct objfile *, void *)) |
0d0e1a63 MK |
944 | { |
945 | struct objfile_data_registration **curr; | |
946 | ||
947 | /* Append new registration. */ | |
948 | for (curr = &objfile_data_registry.registrations; | |
949 | *curr != NULL; curr = &(*curr)->next); | |
7be570e7 | 950 | |
0d0e1a63 MK |
951 | *curr = XMALLOC (struct objfile_data_registration); |
952 | (*curr)->next = NULL; | |
953 | (*curr)->data = XMALLOC (struct objfile_data); | |
954 | (*curr)->data->index = objfile_data_registry.num_registrations++; | |
60c5725c | 955 | (*curr)->data->cleanup = cleanup; |
0d0e1a63 MK |
956 | |
957 | return (*curr)->data; | |
958 | } | |
959 | ||
60c5725c DJ |
960 | const struct objfile_data * |
961 | register_objfile_data (void) | |
962 | { | |
963 | return register_objfile_data_with_cleanup (NULL); | |
964 | } | |
965 | ||
0d0e1a63 MK |
966 | static void |
967 | objfile_alloc_data (struct objfile *objfile) | |
968 | { | |
969 | gdb_assert (objfile->data == NULL); | |
970 | objfile->num_data = objfile_data_registry.num_registrations; | |
971 | objfile->data = XCALLOC (objfile->num_data, void *); | |
972 | } | |
973 | ||
974 | static void | |
975 | objfile_free_data (struct objfile *objfile) | |
976 | { | |
977 | gdb_assert (objfile->data != NULL); | |
60c5725c | 978 | clear_objfile_data (objfile); |
0d0e1a63 MK |
979 | xfree (objfile->data); |
980 | objfile->data = NULL; | |
981 | } | |
982 | ||
7b097ae3 MK |
983 | void |
984 | clear_objfile_data (struct objfile *objfile) | |
985 | { | |
60c5725c DJ |
986 | struct objfile_data_registration *registration; |
987 | int i; | |
988 | ||
7b097ae3 | 989 | gdb_assert (objfile->data != NULL); |
60c5725c DJ |
990 | |
991 | for (registration = objfile_data_registry.registrations, i = 0; | |
992 | i < objfile->num_data; | |
993 | registration = registration->next, i++) | |
994 | if (objfile->data[i] != NULL && registration->data->cleanup) | |
995 | registration->data->cleanup (objfile, objfile->data[i]); | |
996 | ||
7b097ae3 MK |
997 | memset (objfile->data, 0, objfile->num_data * sizeof (void *)); |
998 | } | |
999 | ||
0d0e1a63 MK |
1000 | void |
1001 | set_objfile_data (struct objfile *objfile, const struct objfile_data *data, | |
1002 | void *value) | |
1003 | { | |
1004 | gdb_assert (data->index < objfile->num_data); | |
1005 | objfile->data[data->index] = value; | |
1006 | } | |
1007 | ||
1008 | void * | |
1009 | objfile_data (struct objfile *objfile, const struct objfile_data *data) | |
1010 | { | |
1011 | gdb_assert (data->index < objfile->num_data); | |
1012 | return objfile->data[data->index]; | |
1013 | } | |
a845f5cb | 1014 | |
bb272892 PP |
1015 | /* Set objfiles_changed_p so section map will be rebuilt next time it |
1016 | is used. Called by reread_symbols. */ | |
a845f5cb PP |
1017 | |
1018 | void | |
bb272892 | 1019 | objfiles_changed (void) |
a845f5cb | 1020 | { |
bb272892 | 1021 | objfiles_changed_p = 1; /* Rebuild section map next time we need it. */ |
a845f5cb | 1022 | } |