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c906108c SS |
1 | /* GDB routines for manipulating objfiles. |
2 | Copyright 1992, 1993, 1994, 1995 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Support, using pieces from other GDB modules. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* This file contains support routines for creating, manipulating, and | |
22 | destroying objfile structures. */ | |
23 | ||
24 | #include "defs.h" | |
25 | #include "bfd.h" /* Binary File Description */ | |
26 | #include "symtab.h" | |
27 | #include "symfile.h" | |
28 | #include "objfiles.h" | |
29 | #include "gdb-stabs.h" | |
30 | #include "target.h" | |
31 | ||
32 | #include <sys/types.h> | |
33 | #include "gdb_stat.h" | |
34 | #include <fcntl.h> | |
35 | #include "obstack.h" | |
36 | #include "gdb_string.h" | |
37 | ||
7a292a7a SS |
38 | #include "breakpoint.h" |
39 | ||
c906108c SS |
40 | /* Prototypes for local functions */ |
41 | ||
42 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
43 | ||
44 | static int | |
45 | open_existing_mapped_file PARAMS ((char *, long, int)); | |
46 | ||
47 | static int | |
48 | open_mapped_file PARAMS ((char *filename, long mtime, int mapped)); | |
49 | ||
50 | static PTR | |
51 | map_to_file PARAMS ((int)); | |
52 | ||
53 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ | |
54 | ||
55 | static void | |
56 | add_to_objfile_sections PARAMS ((bfd *, sec_ptr, PTR)); | |
57 | ||
58 | /* Externally visible variables that are owned by this module. | |
59 | See declarations in objfile.h for more info. */ | |
60 | ||
61 | struct objfile *object_files; /* Linked list of all objfiles */ | |
62 | struct objfile *current_objfile; /* For symbol file being read in */ | |
63 | struct objfile *symfile_objfile; /* Main symbol table loaded from */ | |
64 | struct objfile *rt_common_objfile; /* For runtime common symbols */ | |
65 | ||
66 | int mapped_symbol_files; /* Try to use mapped symbol files */ | |
67 | ||
68 | /* Locate all mappable sections of a BFD file. | |
69 | objfile_p_char is a char * to get it through | |
70 | bfd_map_over_sections; we cast it back to its proper type. */ | |
71 | ||
72 | #ifndef TARGET_KEEP_SECTION | |
73 | #define TARGET_KEEP_SECTION(ASECT) 0 | |
74 | #endif | |
75 | ||
76 | static void | |
77 | add_to_objfile_sections (abfd, asect, objfile_p_char) | |
78 | bfd *abfd; | |
79 | sec_ptr asect; | |
80 | PTR objfile_p_char; | |
81 | { | |
82 | struct objfile *objfile = (struct objfile *) objfile_p_char; | |
83 | struct obj_section section; | |
84 | flagword aflag; | |
85 | ||
86 | aflag = bfd_get_section_flags (abfd, asect); | |
87 | ||
88 | if (!(aflag & SEC_ALLOC) && !(TARGET_KEEP_SECTION(asect))) | |
89 | return; | |
90 | ||
91 | if (0 == bfd_section_size (abfd, asect)) | |
92 | return; | |
93 | section.offset = 0; | |
94 | section.objfile = objfile; | |
95 | section.the_bfd_section = asect; | |
96 | section.ovly_mapped = 0; | |
97 | section.addr = bfd_section_vma (abfd, asect); | |
98 | section.endaddr = section.addr + bfd_section_size (abfd, asect); | |
99 | obstack_grow (&objfile->psymbol_obstack, (char *) §ion, sizeof(section)); | |
100 | objfile->sections_end = (struct obj_section *) (((unsigned long) objfile->sections_end) + 1); | |
101 | } | |
102 | ||
103 | /* Builds a section table for OBJFILE. | |
104 | Returns 0 if OK, 1 on error (in which case bfd_error contains the | |
105 | error). */ | |
106 | ||
107 | int | |
108 | build_objfile_section_table (objfile) | |
109 | struct objfile *objfile; | |
110 | { | |
111 | /* objfile->sections can be already set when reading a mapped symbol | |
112 | file. I believe that we do need to rebuild the section table in | |
113 | this case (we rebuild other things derived from the bfd), but we | |
114 | can't free the old one (it's in the psymbol_obstack). So we just | |
115 | waste some memory. */ | |
116 | ||
117 | objfile->sections_end = 0; | |
118 | bfd_map_over_sections (objfile->obfd, add_to_objfile_sections, (char *)objfile); | |
119 | objfile->sections = (struct obj_section *) | |
120 | obstack_finish (&objfile->psymbol_obstack); | |
121 | objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end; | |
122 | return(0); | |
123 | } | |
124 | ||
125 | /* Given a pointer to an initialized bfd (ABFD) and a flag that indicates | |
126 | whether or not an objfile is to be mapped (MAPPED), allocate a new objfile | |
127 | struct, fill it in as best we can, link it into the list of all known | |
128 | objfiles, and return a pointer to the new objfile struct. | |
129 | ||
130 | USER_LOADED is simply recorded in the objfile. This record offers a way for | |
131 | run_command to remove old objfile entries which are no longer valid (i.e., | |
132 | are associated with an old inferior), but to preserve ones that the user | |
133 | explicitly loaded via the add-symbol-file command. | |
134 | ||
135 | IS_SOLIB is also simply recorded in the objfile. */ | |
136 | ||
137 | struct objfile * | |
138 | allocate_objfile (abfd, mapped, user_loaded, is_solib) | |
139 | bfd *abfd; | |
140 | int mapped; | |
141 | int user_loaded; | |
142 | int is_solib; | |
143 | { | |
144 | struct objfile *objfile = NULL; | |
145 | struct objfile *last_one = NULL; | |
146 | ||
147 | mapped |= mapped_symbol_files; | |
148 | ||
149 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
150 | if (abfd != NULL) | |
151 | { | |
152 | ||
153 | /* If we can support mapped symbol files, try to open/reopen the | |
154 | mapped file that corresponds to the file from which we wish to | |
155 | read symbols. If the objfile is to be mapped, we must malloc | |
156 | the structure itself using the mmap version, and arrange that | |
157 | all memory allocation for the objfile uses the mmap routines. | |
158 | If we are reusing an existing mapped file, from which we get | |
159 | our objfile pointer, we have to make sure that we update the | |
160 | pointers to the alloc/free functions in the obstack, in case | |
161 | these functions have moved within the current gdb. */ | |
162 | ||
163 | int fd; | |
164 | ||
165 | fd = open_mapped_file (bfd_get_filename (abfd), bfd_get_mtime (abfd), | |
166 | mapped); | |
167 | if (fd >= 0) | |
168 | { | |
169 | PTR md; | |
170 | ||
171 | if ((md = map_to_file (fd)) == NULL) | |
172 | { | |
173 | close (fd); | |
174 | } | |
175 | else if ((objfile = (struct objfile *) mmalloc_getkey (md, 0)) != NULL) | |
176 | { | |
177 | /* Update memory corruption handler function addresses. */ | |
178 | init_malloc (md); | |
179 | objfile -> md = md; | |
180 | objfile -> mmfd = fd; | |
181 | /* Update pointers to functions to *our* copies */ | |
182 | obstack_chunkfun (&objfile -> psymbol_cache.cache, xmmalloc); | |
183 | obstack_freefun (&objfile -> psymbol_cache.cache, mfree); | |
184 | obstack_chunkfun (&objfile -> psymbol_obstack, xmmalloc); | |
185 | obstack_freefun (&objfile -> psymbol_obstack, mfree); | |
186 | obstack_chunkfun (&objfile -> symbol_obstack, xmmalloc); | |
187 | obstack_freefun (&objfile -> symbol_obstack, mfree); | |
188 | obstack_chunkfun (&objfile -> type_obstack, xmmalloc); | |
189 | obstack_freefun (&objfile -> type_obstack, mfree); | |
190 | /* If already in objfile list, unlink it. */ | |
191 | unlink_objfile (objfile); | |
192 | /* Forget things specific to a particular gdb, may have changed. */ | |
193 | objfile -> sf = NULL; | |
194 | } | |
195 | else | |
196 | { | |
197 | ||
198 | /* Set up to detect internal memory corruption. MUST be | |
199 | done before the first malloc. See comments in | |
200 | init_malloc() and mmcheck(). */ | |
201 | ||
202 | init_malloc (md); | |
203 | ||
204 | objfile = (struct objfile *) | |
205 | xmmalloc (md, sizeof (struct objfile)); | |
206 | memset (objfile, 0, sizeof (struct objfile)); | |
207 | objfile -> md = md; | |
208 | objfile -> mmfd = fd; | |
209 | objfile -> flags |= OBJF_MAPPED; | |
210 | mmalloc_setkey (objfile -> md, 0, objfile); | |
211 | obstack_specify_allocation_with_arg (&objfile -> psymbol_cache.cache, | |
212 | 0, 0, xmmalloc, mfree, | |
213 | objfile -> md); | |
214 | obstack_specify_allocation_with_arg (&objfile -> psymbol_obstack, | |
215 | 0, 0, xmmalloc, mfree, | |
216 | objfile -> md); | |
217 | obstack_specify_allocation_with_arg (&objfile -> symbol_obstack, | |
218 | 0, 0, xmmalloc, mfree, | |
219 | objfile -> md); | |
220 | obstack_specify_allocation_with_arg (&objfile -> type_obstack, | |
221 | 0, 0, xmmalloc, mfree, | |
222 | objfile -> md); | |
223 | } | |
224 | } | |
225 | ||
226 | if (mapped && (objfile == NULL)) | |
227 | { | |
228 | warning ("symbol table for '%s' will not be mapped", | |
229 | bfd_get_filename (abfd)); | |
230 | } | |
231 | } | |
232 | #else /* !defined(USE_MMALLOC) || !defined(HAVE_MMAP) */ | |
233 | ||
234 | if (mapped) | |
235 | { | |
236 | warning ("mapped symbol tables are not supported on this machine; missing or broken mmap()."); | |
237 | ||
238 | /* Turn off the global flag so we don't try to do mapped symbol tables | |
239 | any more, which shuts up gdb unless the user specifically gives the | |
240 | "mapped" keyword again. */ | |
241 | ||
242 | mapped_symbol_files = 0; | |
243 | } | |
244 | ||
245 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ | |
246 | ||
247 | /* If we don't support mapped symbol files, didn't ask for the file to be | |
248 | mapped, or failed to open the mapped file for some reason, then revert | |
249 | back to an unmapped objfile. */ | |
250 | ||
251 | if (objfile == NULL) | |
252 | { | |
253 | objfile = (struct objfile *) xmalloc (sizeof (struct objfile)); | |
254 | memset (objfile, 0, sizeof (struct objfile)); | |
255 | objfile -> md = NULL; | |
256 | obstack_specify_allocation (&objfile -> psymbol_cache.cache, 0, 0, | |
257 | xmalloc, free); | |
258 | obstack_specify_allocation (&objfile -> psymbol_obstack, 0, 0, xmalloc, | |
259 | free); | |
260 | obstack_specify_allocation (&objfile -> symbol_obstack, 0, 0, xmalloc, | |
261 | free); | |
262 | obstack_specify_allocation (&objfile -> type_obstack, 0, 0, xmalloc, | |
263 | free); | |
264 | } | |
265 | ||
266 | /* Update the per-objfile information that comes from the bfd, ensuring | |
267 | that any data that is reference is saved in the per-objfile data | |
268 | region. */ | |
269 | ||
270 | objfile -> obfd = abfd; | |
271 | if (objfile -> name != NULL) | |
272 | { | |
273 | mfree (objfile -> md, objfile -> name); | |
274 | } | |
275 | if (abfd != NULL) | |
276 | { | |
277 | objfile -> name = mstrsave (objfile -> md, bfd_get_filename (abfd)); | |
278 | objfile -> mtime = bfd_get_mtime (abfd); | |
279 | ||
280 | /* Build section table. */ | |
281 | ||
282 | if (build_objfile_section_table (objfile)) | |
283 | { | |
284 | error ("Can't find the file sections in `%s': %s", | |
285 | objfile -> name, bfd_errmsg (bfd_get_error ())); | |
286 | } | |
287 | } | |
288 | ||
289 | /* Add this file onto the tail of the linked list of other such files. */ | |
290 | ||
291 | objfile -> next = NULL; | |
292 | if (object_files == NULL) | |
293 | object_files = objfile; | |
294 | else | |
295 | { | |
296 | for (last_one = object_files; | |
297 | last_one -> next; | |
298 | last_one = last_one -> next); | |
299 | last_one -> next = objfile; | |
300 | } | |
301 | ||
302 | /* Record whether this objfile was created because the user explicitly | |
303 | caused it (e.g., used the add-symbol-file command). | |
304 | */ | |
305 | objfile -> user_loaded = user_loaded; | |
306 | ||
307 | /* Record whether this objfile definitely represents a solib. */ | |
308 | objfile -> is_solib = is_solib; | |
309 | ||
310 | return (objfile); | |
311 | } | |
312 | ||
313 | /* Put OBJFILE at the front of the list. */ | |
314 | ||
315 | void | |
316 | objfile_to_front (objfile) | |
317 | struct objfile *objfile; | |
318 | { | |
319 | struct objfile **objp; | |
320 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
321 | { | |
322 | if (*objp == objfile) | |
323 | { | |
324 | /* Unhook it from where it is. */ | |
325 | *objp = objfile->next; | |
326 | /* Put it in the front. */ | |
327 | objfile->next = object_files; | |
328 | object_files = objfile; | |
329 | break; | |
330 | } | |
331 | } | |
332 | } | |
333 | ||
334 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the | |
335 | list. | |
336 | ||
337 | It is not a bug, or error, to call this function if OBJFILE is not known | |
338 | to be in the current list. This is done in the case of mapped objfiles, | |
339 | for example, just to ensure that the mapped objfile doesn't appear twice | |
340 | in the list. Since the list is threaded, linking in a mapped objfile | |
341 | twice would create a circular list. | |
342 | ||
343 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
344 | unlinking it, just to ensure that we have completely severed any linkages | |
345 | between the OBJFILE and the list. */ | |
346 | ||
347 | void | |
348 | unlink_objfile (objfile) | |
349 | struct objfile *objfile; | |
350 | { | |
351 | struct objfile** objpp; | |
352 | ||
353 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp) -> next)) | |
354 | { | |
355 | if (*objpp == objfile) | |
356 | { | |
357 | *objpp = (*objpp) -> next; | |
358 | objfile -> next = NULL; | |
359 | break; | |
360 | } | |
361 | } | |
362 | } | |
363 | ||
364 | ||
365 | /* Destroy an objfile and all the symtabs and psymtabs under it. Note | |
366 | that as much as possible is allocated on the symbol_obstack and | |
367 | psymbol_obstack, so that the memory can be efficiently freed. | |
368 | ||
369 | Things which we do NOT free because they are not in malloc'd memory | |
370 | or not in memory specific to the objfile include: | |
371 | ||
372 | objfile -> sf | |
373 | ||
374 | FIXME: If the objfile is using reusable symbol information (via mmalloc), | |
375 | then we need to take into account the fact that more than one process | |
376 | may be using the symbol information at the same time (when mmalloc is | |
377 | extended to support cooperative locking). When more than one process | |
378 | is using the mapped symbol info, we need to be more careful about when | |
379 | we free objects in the reusable area. */ | |
380 | ||
381 | void | |
382 | free_objfile (objfile) | |
383 | struct objfile *objfile; | |
384 | { | |
385 | /* First do any symbol file specific actions required when we are | |
386 | finished with a particular symbol file. Note that if the objfile | |
387 | is using reusable symbol information (via mmalloc) then each of | |
388 | these routines is responsible for doing the correct thing, either | |
389 | freeing things which are valid only during this particular gdb | |
390 | execution, or leaving them to be reused during the next one. */ | |
391 | ||
392 | if (objfile -> sf != NULL) | |
393 | { | |
394 | (*objfile -> sf -> sym_finish) (objfile); | |
395 | } | |
396 | ||
397 | /* We always close the bfd. */ | |
398 | ||
399 | if (objfile -> obfd != NULL) | |
400 | { | |
401 | char *name = bfd_get_filename (objfile->obfd); | |
402 | if (!bfd_close (objfile -> obfd)) | |
403 | warning ("cannot close \"%s\": %s", | |
404 | name, bfd_errmsg (bfd_get_error ())); | |
405 | free (name); | |
406 | } | |
407 | ||
408 | /* Remove it from the chain of all objfiles. */ | |
409 | ||
410 | unlink_objfile (objfile); | |
411 | ||
412 | /* If we are going to free the runtime common objfile, mark it | |
413 | as unallocated. */ | |
414 | ||
415 | if (objfile == rt_common_objfile) | |
416 | rt_common_objfile = NULL; | |
417 | ||
418 | /* Before the symbol table code was redone to make it easier to | |
419 | selectively load and remove information particular to a specific | |
420 | linkage unit, gdb used to do these things whenever the monolithic | |
421 | symbol table was blown away. How much still needs to be done | |
422 | is unknown, but we play it safe for now and keep each action until | |
423 | it is shown to be no longer needed. */ | |
424 | ||
425 | #if defined (CLEAR_SOLIB) | |
426 | CLEAR_SOLIB (); | |
427 | /* CLEAR_SOLIB closes the bfd's for any shared libraries. But | |
428 | the to_sections for a core file might refer to those bfd's. So | |
429 | detach any core file. */ | |
430 | { | |
431 | struct target_ops *t = find_core_target (); | |
432 | if (t != NULL) | |
433 | (t->to_detach) (NULL, 0); | |
434 | } | |
435 | #endif | |
436 | /* I *think* all our callers call clear_symtab_users. If so, no need | |
437 | to call this here. */ | |
438 | clear_pc_function_cache (); | |
439 | ||
440 | /* The last thing we do is free the objfile struct itself for the | |
441 | non-reusable case, or detach from the mapped file for the reusable | |
442 | case. Note that the mmalloc_detach or the mfree is the last thing | |
443 | we can do with this objfile. */ | |
444 | ||
445 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
446 | ||
447 | if (objfile -> flags & OBJF_MAPPED) | |
448 | { | |
449 | /* Remember the fd so we can close it. We can't close it before | |
450 | doing the detach, and after the detach the objfile is gone. */ | |
451 | int mmfd; | |
452 | ||
453 | mmfd = objfile -> mmfd; | |
454 | mmalloc_detach (objfile -> md); | |
455 | objfile = NULL; | |
456 | close (mmfd); | |
457 | } | |
458 | ||
459 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ | |
460 | ||
461 | /* If we still have an objfile, then either we don't support reusable | |
462 | objfiles or this one was not reusable. So free it normally. */ | |
463 | ||
464 | if (objfile != NULL) | |
465 | { | |
466 | if (objfile -> name != NULL) | |
467 | { | |
468 | mfree (objfile -> md, objfile -> name); | |
469 | } | |
470 | if (objfile->global_psymbols.list) | |
471 | mfree (objfile->md, objfile->global_psymbols.list); | |
472 | if (objfile->static_psymbols.list) | |
473 | mfree (objfile->md, objfile->static_psymbols.list); | |
474 | /* Free the obstacks for non-reusable objfiles */ | |
475 | obstack_free (&objfile -> psymbol_cache.cache, 0); | |
476 | obstack_free (&objfile -> psymbol_obstack, 0); | |
477 | obstack_free (&objfile -> symbol_obstack, 0); | |
478 | obstack_free (&objfile -> type_obstack, 0); | |
479 | mfree (objfile -> md, objfile); | |
480 | objfile = NULL; | |
481 | } | |
482 | } | |
483 | ||
484 | ||
485 | /* Free all the object files at once and clean up their users. */ | |
486 | ||
487 | void | |
488 | free_all_objfiles () | |
489 | { | |
490 | struct objfile *objfile, *temp; | |
491 | ||
492 | ALL_OBJFILES_SAFE (objfile, temp) | |
493 | { | |
494 | free_objfile (objfile); | |
495 | } | |
496 | clear_symtab_users (); | |
497 | } | |
498 | \f | |
499 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
500 | entries in new_offsets. */ | |
501 | void | |
502 | objfile_relocate (objfile, new_offsets) | |
503 | struct objfile *objfile; | |
504 | struct section_offsets *new_offsets; | |
505 | { | |
506 | struct section_offsets *delta = (struct section_offsets *) | |
507 | alloca (sizeof (struct section_offsets) | |
508 | + objfile->num_sections * sizeof (delta->offsets)); | |
509 | ||
510 | { | |
511 | int i; | |
512 | int something_changed = 0; | |
513 | for (i = 0; i < objfile->num_sections; ++i) | |
514 | { | |
515 | ANOFFSET (delta, i) = | |
516 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); | |
517 | if (ANOFFSET (delta, i) != 0) | |
518 | something_changed = 1; | |
519 | } | |
520 | if (!something_changed) | |
521 | return; | |
522 | } | |
523 | ||
524 | /* OK, get all the symtabs. */ | |
525 | { | |
526 | struct symtab *s; | |
527 | ||
528 | ALL_OBJFILE_SYMTABS (objfile, s) | |
529 | { | |
530 | struct linetable *l; | |
531 | struct blockvector *bv; | |
532 | int i; | |
533 | ||
534 | /* First the line table. */ | |
535 | l = LINETABLE (s); | |
536 | if (l) | |
537 | { | |
538 | for (i = 0; i < l->nitems; ++i) | |
539 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
540 | } | |
541 | ||
542 | /* Don't relocate a shared blockvector more than once. */ | |
543 | if (!s->primary) | |
544 | continue; | |
545 | ||
546 | bv = BLOCKVECTOR (s); | |
547 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) | |
548 | { | |
549 | struct block *b; | |
550 | int j; | |
551 | ||
552 | b = BLOCKVECTOR_BLOCK (bv, i); | |
553 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
554 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); | |
555 | ||
556 | for (j = 0; j < BLOCK_NSYMS (b); ++j) | |
557 | { | |
558 | struct symbol *sym = BLOCK_SYM (b, j); | |
559 | /* The RS6000 code from which this was taken skipped | |
560 | any symbols in STRUCT_NAMESPACE or UNDEF_NAMESPACE. | |
561 | But I'm leaving out that test, on the theory that | |
562 | they can't possibly pass the tests below. */ | |
563 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
564 | || SYMBOL_CLASS (sym) == LOC_STATIC | |
565 | || SYMBOL_CLASS (sym) == LOC_INDIRECT) | |
566 | && SYMBOL_SECTION (sym) >= 0) | |
567 | { | |
568 | SYMBOL_VALUE_ADDRESS (sym) += | |
569 | ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
570 | } | |
571 | #ifdef MIPS_EFI_SYMBOL_NAME | |
572 | /* Relocate Extra Function Info for ecoff. */ | |
573 | ||
574 | else | |
575 | if (SYMBOL_CLASS (sym) == LOC_CONST | |
576 | && SYMBOL_NAMESPACE (sym) == LABEL_NAMESPACE | |
577 | && STRCMP (SYMBOL_NAME (sym), MIPS_EFI_SYMBOL_NAME) == 0) | |
578 | ecoff_relocate_efi (sym, ANOFFSET (delta, | |
579 | s->block_line_section)); | |
580 | #endif | |
581 | } | |
582 | } | |
583 | } | |
584 | } | |
585 | ||
586 | { | |
587 | struct partial_symtab *p; | |
588 | ||
589 | ALL_OBJFILE_PSYMTABS (objfile, p) | |
590 | { | |
591 | p->textlow += ANOFFSET (delta, SECT_OFF_TEXT); | |
592 | p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT); | |
593 | } | |
594 | } | |
595 | ||
596 | { | |
597 | struct partial_symbol **psym; | |
598 | ||
599 | for (psym = objfile->global_psymbols.list; | |
600 | psym < objfile->global_psymbols.next; | |
601 | psym++) | |
602 | if (SYMBOL_SECTION (*psym) >= 0) | |
603 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, | |
604 | SYMBOL_SECTION (*psym)); | |
605 | for (psym = objfile->static_psymbols.list; | |
606 | psym < objfile->static_psymbols.next; | |
607 | psym++) | |
608 | if (SYMBOL_SECTION (*psym) >= 0) | |
609 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, | |
610 | SYMBOL_SECTION (*psym)); | |
611 | } | |
612 | ||
613 | { | |
614 | struct minimal_symbol *msym; | |
615 | ALL_OBJFILE_MSYMBOLS (objfile, msym) | |
616 | if (SYMBOL_SECTION (msym) >= 0) | |
617 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); | |
618 | } | |
619 | /* Relocating different sections by different amounts may cause the symbols | |
620 | to be out of order. */ | |
621 | msymbols_sort (objfile); | |
622 | ||
623 | { | |
624 | int i; | |
625 | for (i = 0; i < objfile->num_sections; ++i) | |
626 | ANOFFSET (objfile->section_offsets, i) = ANOFFSET (new_offsets, i); | |
627 | } | |
628 | ||
629 | { | |
630 | struct obj_section *s; | |
631 | bfd *abfd; | |
632 | ||
633 | abfd = objfile->obfd; | |
634 | ||
635 | for (s = objfile->sections; | |
636 | s < objfile->sections_end; ++s) | |
637 | { | |
638 | flagword flags; | |
639 | ||
640 | flags = bfd_get_section_flags (abfd, s->the_bfd_section); | |
641 | ||
642 | if (flags & SEC_CODE) | |
643 | { | |
644 | s->addr += ANOFFSET (delta, SECT_OFF_TEXT); | |
645 | s->endaddr += ANOFFSET (delta, SECT_OFF_TEXT); | |
646 | } | |
647 | else if (flags & (SEC_DATA | SEC_LOAD)) | |
648 | { | |
649 | s->addr += ANOFFSET (delta, SECT_OFF_DATA); | |
650 | s->endaddr += ANOFFSET (delta, SECT_OFF_DATA); | |
651 | } | |
652 | else if (flags & SEC_ALLOC) | |
653 | { | |
654 | s->addr += ANOFFSET (delta, SECT_OFF_BSS); | |
655 | s->endaddr += ANOFFSET (delta, SECT_OFF_BSS); | |
656 | } | |
657 | } | |
658 | } | |
659 | ||
660 | if (objfile->ei.entry_point != ~(CORE_ADDR)0) | |
661 | objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT); | |
662 | ||
663 | if (objfile->ei.entry_func_lowpc != INVALID_ENTRY_LOWPC) | |
664 | { | |
665 | objfile->ei.entry_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); | |
666 | objfile->ei.entry_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT); | |
667 | } | |
668 | ||
669 | if (objfile->ei.entry_file_lowpc != INVALID_ENTRY_LOWPC) | |
670 | { | |
671 | objfile->ei.entry_file_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); | |
672 | objfile->ei.entry_file_highpc += ANOFFSET (delta, SECT_OFF_TEXT); | |
673 | } | |
674 | ||
675 | if (objfile->ei.main_func_lowpc != INVALID_ENTRY_LOWPC) | |
676 | { | |
677 | objfile->ei.main_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); | |
678 | objfile->ei.main_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT); | |
679 | } | |
680 | ||
681 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
682 | breakpoint_re_set (); | |
683 | } | |
684 | \f | |
685 | /* Many places in gdb want to test just to see if we have any partial | |
686 | symbols available. This function returns zero if none are currently | |
687 | available, nonzero otherwise. */ | |
688 | ||
689 | int | |
690 | have_partial_symbols () | |
691 | { | |
692 | struct objfile *ofp; | |
693 | ||
694 | ALL_OBJFILES (ofp) | |
695 | { | |
696 | if (ofp -> psymtabs != NULL) | |
697 | { | |
698 | return 1; | |
699 | } | |
700 | } | |
701 | return 0; | |
702 | } | |
703 | ||
704 | /* Many places in gdb want to test just to see if we have any full | |
705 | symbols available. This function returns zero if none are currently | |
706 | available, nonzero otherwise. */ | |
707 | ||
708 | int | |
709 | have_full_symbols () | |
710 | { | |
711 | struct objfile *ofp; | |
712 | ||
713 | ALL_OBJFILES (ofp) | |
714 | { | |
715 | if (ofp -> symtabs != NULL) | |
716 | { | |
717 | return 1; | |
718 | } | |
719 | } | |
720 | return 0; | |
721 | } | |
722 | ||
723 | ||
724 | /* This operations deletes all objfile entries that represent solibs that | |
725 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
726 | command. | |
727 | */ | |
728 | void | |
729 | objfile_purge_solibs () | |
730 | { | |
731 | struct objfile * objf; | |
732 | struct objfile * temp; | |
733 | ||
734 | ALL_OBJFILES_SAFE (objf, temp) | |
735 | { | |
736 | /* We assume that the solib package has been purged already, or will | |
737 | be soon. | |
738 | */ | |
739 | if (! objf->user_loaded && objf->is_solib) | |
740 | free_objfile (objf); | |
741 | } | |
742 | } | |
743 | ||
744 | ||
745 | /* Many places in gdb want to test just to see if we have any minimal | |
746 | symbols available. This function returns zero if none are currently | |
747 | available, nonzero otherwise. */ | |
748 | ||
749 | int | |
750 | have_minimal_symbols () | |
751 | { | |
752 | struct objfile *ofp; | |
753 | ||
754 | ALL_OBJFILES (ofp) | |
755 | { | |
756 | if (ofp -> msymbols != NULL) | |
757 | { | |
758 | return 1; | |
759 | } | |
760 | } | |
761 | return 0; | |
762 | } | |
763 | ||
764 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
765 | ||
766 | /* Given the name of a mapped symbol file in SYMSFILENAME, and the timestamp | |
767 | of the corresponding symbol file in MTIME, try to open an existing file | |
768 | with the name SYMSFILENAME and verify it is more recent than the base | |
769 | file by checking it's timestamp against MTIME. | |
770 | ||
771 | If SYMSFILENAME does not exist (or can't be stat'd), simply returns -1. | |
772 | ||
773 | If SYMSFILENAME does exist, but is out of date, we check to see if the | |
774 | user has specified creation of a mapped file. If so, we don't issue | |
775 | any warning message because we will be creating a new mapped file anyway, | |
776 | overwriting the old one. If not, then we issue a warning message so that | |
777 | the user will know why we aren't using this existing mapped symbol file. | |
778 | In either case, we return -1. | |
779 | ||
780 | If SYMSFILENAME does exist and is not out of date, but can't be opened for | |
781 | some reason, then prints an appropriate system error message and returns -1. | |
782 | ||
783 | Otherwise, returns the open file descriptor. */ | |
784 | ||
785 | static int | |
786 | open_existing_mapped_file (symsfilename, mtime, mapped) | |
787 | char *symsfilename; | |
788 | long mtime; | |
789 | int mapped; | |
790 | { | |
791 | int fd = -1; | |
792 | struct stat sbuf; | |
793 | ||
794 | if (stat (symsfilename, &sbuf) == 0) | |
795 | { | |
796 | if (sbuf.st_mtime < mtime) | |
797 | { | |
798 | if (!mapped) | |
799 | { | |
800 | warning ("mapped symbol file `%s' is out of date, ignored it", | |
801 | symsfilename); | |
802 | } | |
803 | } | |
804 | else if ((fd = open (symsfilename, O_RDWR)) < 0) | |
805 | { | |
806 | if (error_pre_print) | |
807 | { | |
808 | printf_unfiltered (error_pre_print); | |
809 | } | |
810 | print_sys_errmsg (symsfilename, errno); | |
811 | } | |
812 | } | |
813 | return (fd); | |
814 | } | |
815 | ||
816 | /* Look for a mapped symbol file that corresponds to FILENAME and is more | |
817 | recent than MTIME. If MAPPED is nonzero, the user has asked that gdb | |
818 | use a mapped symbol file for this file, so create a new one if one does | |
819 | not currently exist. | |
820 | ||
821 | If found, then return an open file descriptor for the file, otherwise | |
822 | return -1. | |
823 | ||
824 | This routine is responsible for implementing the policy that generates | |
825 | the name of the mapped symbol file from the name of a file containing | |
826 | symbols that gdb would like to read. Currently this policy is to append | |
827 | ".syms" to the name of the file. | |
828 | ||
829 | This routine is also responsible for implementing the policy that | |
830 | determines where the mapped symbol file is found (the search path). | |
831 | This policy is that when reading an existing mapped file, a file of | |
832 | the correct name in the current directory takes precedence over a | |
833 | file of the correct name in the same directory as the symbol file. | |
834 | When creating a new mapped file, it is always created in the current | |
835 | directory. This helps to minimize the chances of a user unknowingly | |
836 | creating big mapped files in places like /bin and /usr/local/bin, and | |
837 | allows a local copy to override a manually installed global copy (in | |
838 | /bin for example). */ | |
839 | ||
840 | static int | |
841 | open_mapped_file (filename, mtime, mapped) | |
842 | char *filename; | |
843 | long mtime; | |
844 | int mapped; | |
845 | { | |
846 | int fd; | |
847 | char *symsfilename; | |
848 | ||
849 | /* First try to open an existing file in the current directory, and | |
850 | then try the directory where the symbol file is located. */ | |
851 | ||
852 | symsfilename = concat ("./", basename (filename), ".syms", (char *) NULL); | |
853 | if ((fd = open_existing_mapped_file (symsfilename, mtime, mapped)) < 0) | |
854 | { | |
855 | free (symsfilename); | |
856 | symsfilename = concat (filename, ".syms", (char *) NULL); | |
857 | fd = open_existing_mapped_file (symsfilename, mtime, mapped); | |
858 | } | |
859 | ||
860 | /* If we don't have an open file by now, then either the file does not | |
861 | already exist, or the base file has changed since it was created. In | |
862 | either case, if the user has specified use of a mapped file, then | |
863 | create a new mapped file, truncating any existing one. If we can't | |
864 | create one, print a system error message saying why we can't. | |
865 | ||
866 | By default the file is rw for everyone, with the user's umask taking | |
867 | care of turning off the permissions the user wants off. */ | |
868 | ||
869 | if ((fd < 0) && mapped) | |
870 | { | |
871 | free (symsfilename); | |
872 | symsfilename = concat ("./", basename (filename), ".syms", | |
873 | (char *) NULL); | |
874 | if ((fd = open (symsfilename, O_RDWR | O_CREAT | O_TRUNC, 0666)) < 0) | |
875 | { | |
876 | if (error_pre_print) | |
877 | { | |
878 | printf_unfiltered (error_pre_print); | |
879 | } | |
880 | print_sys_errmsg (symsfilename, errno); | |
881 | } | |
882 | } | |
883 | ||
884 | free (symsfilename); | |
885 | return (fd); | |
886 | } | |
887 | ||
888 | static PTR | |
889 | map_to_file (fd) | |
890 | int fd; | |
891 | { | |
892 | PTR md; | |
893 | CORE_ADDR mapto; | |
894 | ||
895 | md = mmalloc_attach (fd, (PTR) 0); | |
896 | if (md != NULL) | |
897 | { | |
898 | mapto = (CORE_ADDR) mmalloc_getkey (md, 1); | |
899 | md = mmalloc_detach (md); | |
900 | if (md != NULL) | |
901 | { | |
902 | /* FIXME: should figure out why detach failed */ | |
903 | md = NULL; | |
904 | } | |
905 | else if (mapto != (CORE_ADDR) NULL) | |
906 | { | |
907 | /* This mapping file needs to be remapped at "mapto" */ | |
908 | md = mmalloc_attach (fd, (PTR) mapto); | |
909 | } | |
910 | else | |
911 | { | |
912 | /* This is a freshly created mapping file. */ | |
913 | mapto = (CORE_ADDR) mmalloc_findbase (20 * 1024 * 1024); | |
914 | if (mapto != 0) | |
915 | { | |
916 | /* To avoid reusing the freshly created mapping file, at the | |
917 | address selected by mmap, we must truncate it before trying | |
918 | to do an attach at the address we want. */ | |
919 | ftruncate (fd, 0); | |
920 | md = mmalloc_attach (fd, (PTR) mapto); | |
921 | if (md != NULL) | |
922 | { | |
923 | mmalloc_setkey (md, 1, (PTR) mapto); | |
924 | } | |
925 | } | |
926 | } | |
927 | } | |
928 | return (md); | |
929 | } | |
930 | ||
931 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ | |
932 | ||
933 | /* Returns a section whose range includes PC and SECTION, | |
934 | or NULL if none found. Note the distinction between the return type, | |
935 | struct obj_section (which is defined in gdb), and the input type | |
936 | struct sec (which is a bfd-defined data type). The obj_section | |
937 | contains a pointer to the bfd struct sec section. */ | |
938 | ||
939 | struct obj_section * | |
940 | find_pc_sect_section (pc, section) | |
941 | CORE_ADDR pc; | |
942 | struct sec *section; | |
943 | { | |
944 | struct obj_section *s; | |
945 | struct objfile *objfile; | |
946 | ||
947 | ALL_OBJFILES (objfile) | |
948 | for (s = objfile->sections; s < objfile->sections_end; ++s) | |
949 | #if defined(HPUXHPPA) | |
950 | if ((section == 0 || section == s->the_bfd_section) && | |
951 | s->addr <= pc && pc <= s->endaddr) | |
952 | #else | |
953 | if ((section == 0 || section == s->the_bfd_section) && | |
954 | s->addr <= pc && pc < s->endaddr) | |
955 | #endif | |
956 | return(s); | |
957 | ||
958 | return(NULL); | |
959 | } | |
960 | ||
961 | /* Returns a section whose range includes PC or NULL if none found. | |
962 | Backward compatibility, no section. */ | |
963 | ||
964 | struct obj_section * | |
965 | find_pc_section(pc) | |
966 | CORE_ADDR pc; | |
967 | { | |
968 | return find_pc_sect_section (pc, find_pc_mapped_section (pc)); | |
969 | } | |
970 | ||
971 | ||
972 | /* In SVR4, we recognize a trampoline by it's section name. | |
973 | That is, if the pc is in a section named ".plt" then we are in | |
974 | a trampoline. */ | |
975 | ||
976 | int | |
977 | in_plt_section(pc, name) | |
978 | CORE_ADDR pc; | |
979 | char *name; | |
980 | { | |
981 | struct obj_section *s; | |
982 | int retval = 0; | |
983 | ||
984 | s = find_pc_section(pc); | |
985 | ||
986 | retval = (s != NULL | |
987 | && s->the_bfd_section->name != NULL | |
988 | && STREQ (s->the_bfd_section->name, ".plt")); | |
989 | return(retval); | |
990 | } |