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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 | ||
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
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. | |
c906108c | 11 | |
c5aa993b JM |
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. | |
c906108c | 16 | |
c5aa993b JM |
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, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
21 | |
22 | /* This file contains support routines for creating, manipulating, and | |
23 | destroying objfile structures. */ | |
24 | ||
25 | #include "defs.h" | |
26 | #include "bfd.h" /* Binary File Description */ | |
27 | #include "symtab.h" | |
28 | #include "symfile.h" | |
29 | #include "objfiles.h" | |
30 | #include "gdb-stabs.h" | |
31 | #include "target.h" | |
32 | ||
33 | #include <sys/types.h> | |
34 | #include "gdb_stat.h" | |
35 | #include <fcntl.h> | |
36 | #include "obstack.h" | |
37 | #include "gdb_string.h" | |
38 | ||
7a292a7a SS |
39 | #include "breakpoint.h" |
40 | ||
c906108c SS |
41 | /* Prototypes for local functions */ |
42 | ||
43 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
44 | ||
45 | static int | |
46 | open_existing_mapped_file PARAMS ((char *, long, int)); | |
47 | ||
48 | static int | |
49 | open_mapped_file PARAMS ((char *filename, long mtime, int mapped)); | |
50 | ||
51 | static PTR | |
c5aa993b | 52 | map_to_file PARAMS ((int)); |
c906108c | 53 | |
c5aa993b | 54 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c SS |
55 | |
56 | static void | |
57 | add_to_objfile_sections PARAMS ((bfd *, sec_ptr, PTR)); | |
58 | ||
59 | /* Externally visible variables that are owned by this module. | |
60 | See declarations in objfile.h for more info. */ | |
61 | ||
c5aa993b | 62 | struct objfile *object_files; /* Linked list of all objfiles */ |
c906108c SS |
63 | struct objfile *current_objfile; /* For symbol file being read in */ |
64 | struct objfile *symfile_objfile; /* Main symbol table loaded from */ | |
65 | struct objfile *rt_common_objfile; /* For runtime common symbols */ | |
66 | ||
c5aa993b | 67 | int mapped_symbol_files; /* Try to use mapped symbol files */ |
c906108c SS |
68 | |
69 | /* Locate all mappable sections of a BFD file. | |
70 | objfile_p_char is a char * to get it through | |
71 | bfd_map_over_sections; we cast it back to its proper type. */ | |
72 | ||
73 | #ifndef TARGET_KEEP_SECTION | |
74 | #define TARGET_KEEP_SECTION(ASECT) 0 | |
75 | #endif | |
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 SS |
82 | static void |
83 | add_to_objfile_sections (abfd, asect, objfile_p_char) | |
84 | bfd *abfd; | |
85 | sec_ptr asect; | |
86 | PTR objfile_p_char; | |
87 | { | |
88 | struct objfile *objfile = (struct objfile *) objfile_p_char; | |
89 | struct obj_section section; | |
90 | flagword aflag; | |
91 | ||
92 | aflag = bfd_get_section_flags (abfd, asect); | |
93 | ||
c5aa993b | 94 | if (!(aflag & SEC_ALLOC) && !(TARGET_KEEP_SECTION (asect))) |
c906108c SS |
95 | return; |
96 | ||
97 | if (0 == bfd_section_size (abfd, asect)) | |
98 | return; | |
99 | section.offset = 0; | |
100 | section.objfile = objfile; | |
101 | section.the_bfd_section = asect; | |
102 | section.ovly_mapped = 0; | |
103 | section.addr = bfd_section_vma (abfd, asect); | |
104 | section.endaddr = section.addr + bfd_section_size (abfd, asect); | |
c5aa993b | 105 | obstack_grow (&objfile->psymbol_obstack, (char *) §ion, sizeof (section)); |
c906108c SS |
106 | objfile->sections_end = (struct obj_section *) (((unsigned long) objfile->sections_end) + 1); |
107 | } | |
108 | ||
109 | /* Builds a section table for OBJFILE. | |
110 | Returns 0 if OK, 1 on error (in which case bfd_error contains the | |
96baa820 JM |
111 | error). |
112 | ||
113 | Note that while we are building the table, which goes into the | |
114 | psymbol obstack, we hijack the sections_end pointer to instead hold | |
115 | a count of the number of sections. When bfd_map_over_sections | |
116 | returns, this count is used to compute the pointer to the end of | |
117 | the sections table, which then overwrites the count. | |
118 | ||
119 | Also note that the OFFSET and OVLY_MAPPED in each table entry | |
120 | are initialized to zero. | |
121 | ||
122 | Also note that if anything else writes to the psymbol obstack while | |
123 | we are building the table, we're pretty much hosed. */ | |
c906108c SS |
124 | |
125 | int | |
126 | build_objfile_section_table (objfile) | |
127 | struct objfile *objfile; | |
128 | { | |
129 | /* objfile->sections can be already set when reading a mapped symbol | |
130 | file. I believe that we do need to rebuild the section table in | |
131 | this case (we rebuild other things derived from the bfd), but we | |
132 | can't free the old one (it's in the psymbol_obstack). So we just | |
133 | waste some memory. */ | |
134 | ||
135 | objfile->sections_end = 0; | |
c5aa993b | 136 | bfd_map_over_sections (objfile->obfd, add_to_objfile_sections, (char *) objfile); |
c906108c SS |
137 | objfile->sections = (struct obj_section *) |
138 | obstack_finish (&objfile->psymbol_obstack); | |
139 | objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end; | |
c5aa993b | 140 | return (0); |
c906108c SS |
141 | } |
142 | ||
143 | /* Given a pointer to an initialized bfd (ABFD) and a flag that indicates | |
144 | whether or not an objfile is to be mapped (MAPPED), allocate a new objfile | |
145 | struct, fill it in as best we can, link it into the list of all known | |
146 | objfiles, and return a pointer to the new objfile struct. | |
147 | ||
148 | USER_LOADED is simply recorded in the objfile. This record offers a way for | |
149 | run_command to remove old objfile entries which are no longer valid (i.e., | |
150 | are associated with an old inferior), but to preserve ones that the user | |
151 | explicitly loaded via the add-symbol-file command. | |
152 | ||
153 | IS_SOLIB is also simply recorded in the objfile. */ | |
154 | ||
155 | struct objfile * | |
156 | allocate_objfile (abfd, mapped, user_loaded, is_solib) | |
157 | bfd *abfd; | |
158 | int mapped; | |
c5aa993b JM |
159 | int user_loaded; |
160 | int is_solib; | |
c906108c SS |
161 | { |
162 | struct objfile *objfile = NULL; | |
163 | struct objfile *last_one = NULL; | |
164 | ||
165 | mapped |= mapped_symbol_files; | |
166 | ||
167 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
168 | if (abfd != NULL) | |
c5aa993b | 169 | { |
c906108c | 170 | |
c5aa993b JM |
171 | /* If we can support mapped symbol files, try to open/reopen the |
172 | mapped file that corresponds to the file from which we wish to | |
173 | read symbols. If the objfile is to be mapped, we must malloc | |
174 | the structure itself using the mmap version, and arrange that | |
175 | all memory allocation for the objfile uses the mmap routines. | |
176 | If we are reusing an existing mapped file, from which we get | |
177 | our objfile pointer, we have to make sure that we update the | |
178 | pointers to the alloc/free functions in the obstack, in case | |
179 | these functions have moved within the current gdb. */ | |
180 | ||
181 | int fd; | |
182 | ||
183 | fd = open_mapped_file (bfd_get_filename (abfd), bfd_get_mtime (abfd), | |
184 | mapped); | |
185 | if (fd >= 0) | |
186 | { | |
187 | PTR md; | |
c906108c | 188 | |
c5aa993b JM |
189 | if ((md = map_to_file (fd)) == NULL) |
190 | { | |
191 | close (fd); | |
192 | } | |
193 | else if ((objfile = (struct objfile *) mmalloc_getkey (md, 0)) != NULL) | |
194 | { | |
195 | /* Update memory corruption handler function addresses. */ | |
196 | init_malloc (md); | |
197 | objfile->md = md; | |
198 | objfile->mmfd = fd; | |
199 | /* Update pointers to functions to *our* copies */ | |
200 | obstack_chunkfun (&objfile->psymbol_cache.cache, xmmalloc); | |
201 | obstack_freefun (&objfile->psymbol_cache.cache, mfree); | |
202 | obstack_chunkfun (&objfile->psymbol_obstack, xmmalloc); | |
203 | obstack_freefun (&objfile->psymbol_obstack, mfree); | |
204 | obstack_chunkfun (&objfile->symbol_obstack, xmmalloc); | |
205 | obstack_freefun (&objfile->symbol_obstack, mfree); | |
206 | obstack_chunkfun (&objfile->type_obstack, xmmalloc); | |
207 | obstack_freefun (&objfile->type_obstack, mfree); | |
208 | /* If already in objfile list, unlink it. */ | |
209 | unlink_objfile (objfile); | |
210 | /* Forget things specific to a particular gdb, may have changed. */ | |
211 | objfile->sf = NULL; | |
212 | } | |
213 | else | |
214 | { | |
c906108c | 215 | |
c5aa993b JM |
216 | /* Set up to detect internal memory corruption. MUST be |
217 | done before the first malloc. See comments in | |
218 | init_malloc() and mmcheck(). */ | |
219 | ||
220 | init_malloc (md); | |
221 | ||
222 | objfile = (struct objfile *) | |
223 | xmmalloc (md, sizeof (struct objfile)); | |
224 | memset (objfile, 0, sizeof (struct objfile)); | |
225 | objfile->md = md; | |
226 | objfile->mmfd = fd; | |
227 | objfile->flags |= OBJF_MAPPED; | |
228 | mmalloc_setkey (objfile->md, 0, objfile); | |
229 | obstack_specify_allocation_with_arg (&objfile->psymbol_cache.cache, | |
230 | 0, 0, xmmalloc, mfree, | |
231 | objfile->md); | |
232 | obstack_specify_allocation_with_arg (&objfile->psymbol_obstack, | |
233 | 0, 0, xmmalloc, mfree, | |
234 | objfile->md); | |
235 | obstack_specify_allocation_with_arg (&objfile->symbol_obstack, | |
236 | 0, 0, xmmalloc, mfree, | |
237 | objfile->md); | |
238 | obstack_specify_allocation_with_arg (&objfile->type_obstack, | |
239 | 0, 0, xmmalloc, mfree, | |
240 | objfile->md); | |
241 | } | |
242 | } | |
c906108c | 243 | |
c5aa993b JM |
244 | if (mapped && (objfile == NULL)) |
245 | { | |
246 | warning ("symbol table for '%s' will not be mapped", | |
247 | bfd_get_filename (abfd)); | |
248 | } | |
249 | } | |
250 | #else /* !defined(USE_MMALLOC) || !defined(HAVE_MMAP) */ | |
c906108c SS |
251 | |
252 | if (mapped) | |
253 | { | |
254 | warning ("mapped symbol tables are not supported on this machine; missing or broken mmap()."); | |
255 | ||
256 | /* Turn off the global flag so we don't try to do mapped symbol tables | |
c5aa993b JM |
257 | any more, which shuts up gdb unless the user specifically gives the |
258 | "mapped" keyword again. */ | |
c906108c SS |
259 | |
260 | mapped_symbol_files = 0; | |
261 | } | |
262 | ||
c5aa993b | 263 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c SS |
264 | |
265 | /* If we don't support mapped symbol files, didn't ask for the file to be | |
266 | mapped, or failed to open the mapped file for some reason, then revert | |
267 | back to an unmapped objfile. */ | |
268 | ||
269 | if (objfile == NULL) | |
270 | { | |
271 | objfile = (struct objfile *) xmalloc (sizeof (struct objfile)); | |
272 | memset (objfile, 0, sizeof (struct objfile)); | |
c5aa993b JM |
273 | objfile->md = NULL; |
274 | obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0, | |
c906108c | 275 | xmalloc, free); |
c5aa993b | 276 | obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, xmalloc, |
c906108c | 277 | free); |
c5aa993b | 278 | obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, xmalloc, |
c906108c | 279 | free); |
c5aa993b | 280 | obstack_specify_allocation (&objfile->type_obstack, 0, 0, xmalloc, |
c906108c SS |
281 | free); |
282 | } | |
283 | ||
284 | /* Update the per-objfile information that comes from the bfd, ensuring | |
285 | that any data that is reference is saved in the per-objfile data | |
286 | region. */ | |
287 | ||
c5aa993b JM |
288 | objfile->obfd = abfd; |
289 | if (objfile->name != NULL) | |
c906108c | 290 | { |
c5aa993b | 291 | mfree (objfile->md, objfile->name); |
c906108c SS |
292 | } |
293 | if (abfd != NULL) | |
294 | { | |
c5aa993b JM |
295 | objfile->name = mstrsave (objfile->md, bfd_get_filename (abfd)); |
296 | objfile->mtime = bfd_get_mtime (abfd); | |
c906108c SS |
297 | |
298 | /* Build section table. */ | |
299 | ||
300 | if (build_objfile_section_table (objfile)) | |
301 | { | |
c5aa993b JM |
302 | error ("Can't find the file sections in `%s': %s", |
303 | objfile->name, bfd_errmsg (bfd_get_error ())); | |
c906108c SS |
304 | } |
305 | } | |
306 | ||
307 | /* Add this file onto the tail of the linked list of other such files. */ | |
308 | ||
c5aa993b | 309 | objfile->next = NULL; |
c906108c SS |
310 | if (object_files == NULL) |
311 | object_files = objfile; | |
312 | else | |
313 | { | |
314 | for (last_one = object_files; | |
c5aa993b JM |
315 | last_one->next; |
316 | last_one = last_one->next); | |
317 | last_one->next = objfile; | |
c906108c SS |
318 | } |
319 | ||
320 | /* Record whether this objfile was created because the user explicitly | |
321 | caused it (e.g., used the add-symbol-file command). | |
c5aa993b JM |
322 | */ |
323 | objfile->user_loaded = user_loaded; | |
c906108c SS |
324 | |
325 | /* Record whether this objfile definitely represents a solib. */ | |
c5aa993b | 326 | objfile->is_solib = is_solib; |
c906108c SS |
327 | |
328 | return (objfile); | |
329 | } | |
330 | ||
331 | /* Put OBJFILE at the front of the list. */ | |
332 | ||
333 | void | |
334 | objfile_to_front (objfile) | |
335 | struct objfile *objfile; | |
336 | { | |
337 | struct objfile **objp; | |
338 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
339 | { | |
340 | if (*objp == objfile) | |
341 | { | |
342 | /* Unhook it from where it is. */ | |
343 | *objp = objfile->next; | |
344 | /* Put it in the front. */ | |
345 | objfile->next = object_files; | |
346 | object_files = objfile; | |
347 | break; | |
348 | } | |
349 | } | |
350 | } | |
351 | ||
352 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the | |
353 | list. | |
354 | ||
355 | It is not a bug, or error, to call this function if OBJFILE is not known | |
356 | to be in the current list. This is done in the case of mapped objfiles, | |
357 | for example, just to ensure that the mapped objfile doesn't appear twice | |
358 | in the list. Since the list is threaded, linking in a mapped objfile | |
359 | twice would create a circular list. | |
360 | ||
361 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
362 | unlinking it, just to ensure that we have completely severed any linkages | |
363 | between the OBJFILE and the list. */ | |
364 | ||
365 | void | |
366 | unlink_objfile (objfile) | |
367 | struct objfile *objfile; | |
368 | { | |
c5aa993b | 369 | struct objfile **objpp; |
c906108c | 370 | |
c5aa993b | 371 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
c906108c | 372 | { |
c5aa993b | 373 | if (*objpp == objfile) |
c906108c | 374 | { |
c5aa993b JM |
375 | *objpp = (*objpp)->next; |
376 | objfile->next = NULL; | |
c906108c SS |
377 | break; |
378 | } | |
379 | } | |
380 | } | |
381 | ||
382 | ||
383 | /* Destroy an objfile and all the symtabs and psymtabs under it. Note | |
384 | that as much as possible is allocated on the symbol_obstack and | |
385 | psymbol_obstack, so that the memory can be efficiently freed. | |
386 | ||
387 | Things which we do NOT free because they are not in malloc'd memory | |
388 | or not in memory specific to the objfile include: | |
389 | ||
c5aa993b | 390 | objfile -> sf |
c906108c SS |
391 | |
392 | FIXME: If the objfile is using reusable symbol information (via mmalloc), | |
393 | then we need to take into account the fact that more than one process | |
394 | may be using the symbol information at the same time (when mmalloc is | |
395 | extended to support cooperative locking). When more than one process | |
396 | is using the mapped symbol info, we need to be more careful about when | |
397 | we free objects in the reusable area. */ | |
398 | ||
399 | void | |
400 | free_objfile (objfile) | |
401 | struct objfile *objfile; | |
402 | { | |
403 | /* First do any symbol file specific actions required when we are | |
404 | finished with a particular symbol file. Note that if the objfile | |
405 | is using reusable symbol information (via mmalloc) then each of | |
406 | these routines is responsible for doing the correct thing, either | |
407 | freeing things which are valid only during this particular gdb | |
408 | execution, or leaving them to be reused during the next one. */ | |
409 | ||
c5aa993b | 410 | if (objfile->sf != NULL) |
c906108c | 411 | { |
c5aa993b | 412 | (*objfile->sf->sym_finish) (objfile); |
c906108c SS |
413 | } |
414 | ||
415 | /* We always close the bfd. */ | |
416 | ||
c5aa993b | 417 | if (objfile->obfd != NULL) |
c906108c SS |
418 | { |
419 | char *name = bfd_get_filename (objfile->obfd); | |
c5aa993b | 420 | if (!bfd_close (objfile->obfd)) |
c906108c SS |
421 | warning ("cannot close \"%s\": %s", |
422 | name, bfd_errmsg (bfd_get_error ())); | |
423 | free (name); | |
424 | } | |
425 | ||
426 | /* Remove it from the chain of all objfiles. */ | |
427 | ||
428 | unlink_objfile (objfile); | |
429 | ||
430 | /* If we are going to free the runtime common objfile, mark it | |
431 | as unallocated. */ | |
432 | ||
433 | if (objfile == rt_common_objfile) | |
434 | rt_common_objfile = NULL; | |
435 | ||
436 | /* Before the symbol table code was redone to make it easier to | |
437 | selectively load and remove information particular to a specific | |
438 | linkage unit, gdb used to do these things whenever the monolithic | |
439 | symbol table was blown away. How much still needs to be done | |
440 | is unknown, but we play it safe for now and keep each action until | |
441 | it is shown to be no longer needed. */ | |
c5aa993b | 442 | |
c906108c SS |
443 | #if defined (CLEAR_SOLIB) |
444 | CLEAR_SOLIB (); | |
445 | /* CLEAR_SOLIB closes the bfd's for any shared libraries. But | |
446 | the to_sections for a core file might refer to those bfd's. So | |
447 | detach any core file. */ | |
448 | { | |
449 | struct target_ops *t = find_core_target (); | |
450 | if (t != NULL) | |
451 | (t->to_detach) (NULL, 0); | |
452 | } | |
453 | #endif | |
454 | /* I *think* all our callers call clear_symtab_users. If so, no need | |
455 | to call this here. */ | |
456 | clear_pc_function_cache (); | |
457 | ||
458 | /* The last thing we do is free the objfile struct itself for the | |
459 | non-reusable case, or detach from the mapped file for the reusable | |
460 | case. Note that the mmalloc_detach or the mfree is the last thing | |
461 | we can do with this objfile. */ | |
462 | ||
463 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
464 | ||
c5aa993b | 465 | if (objfile->flags & OBJF_MAPPED) |
c906108c SS |
466 | { |
467 | /* Remember the fd so we can close it. We can't close it before | |
c5aa993b | 468 | doing the detach, and after the detach the objfile is gone. */ |
c906108c SS |
469 | int mmfd; |
470 | ||
c5aa993b JM |
471 | mmfd = objfile->mmfd; |
472 | mmalloc_detach (objfile->md); | |
c906108c SS |
473 | objfile = NULL; |
474 | close (mmfd); | |
475 | } | |
476 | ||
c5aa993b | 477 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c SS |
478 | |
479 | /* If we still have an objfile, then either we don't support reusable | |
480 | objfiles or this one was not reusable. So free it normally. */ | |
481 | ||
482 | if (objfile != NULL) | |
483 | { | |
c5aa993b | 484 | if (objfile->name != NULL) |
c906108c | 485 | { |
c5aa993b | 486 | mfree (objfile->md, objfile->name); |
c906108c SS |
487 | } |
488 | if (objfile->global_psymbols.list) | |
489 | mfree (objfile->md, objfile->global_psymbols.list); | |
490 | if (objfile->static_psymbols.list) | |
491 | mfree (objfile->md, objfile->static_psymbols.list); | |
492 | /* Free the obstacks for non-reusable objfiles */ | |
c5aa993b JM |
493 | obstack_free (&objfile->psymbol_cache.cache, 0); |
494 | obstack_free (&objfile->psymbol_obstack, 0); | |
495 | obstack_free (&objfile->symbol_obstack, 0); | |
496 | obstack_free (&objfile->type_obstack, 0); | |
497 | mfree (objfile->md, objfile); | |
c906108c SS |
498 | objfile = NULL; |
499 | } | |
500 | } | |
501 | ||
502 | ||
503 | /* Free all the object files at once and clean up their users. */ | |
504 | ||
505 | void | |
506 | free_all_objfiles () | |
507 | { | |
508 | struct objfile *objfile, *temp; | |
509 | ||
510 | ALL_OBJFILES_SAFE (objfile, temp) | |
c5aa993b JM |
511 | { |
512 | free_objfile (objfile); | |
513 | } | |
c906108c SS |
514 | clear_symtab_users (); |
515 | } | |
516 | \f | |
517 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
518 | entries in new_offsets. */ | |
519 | void | |
520 | objfile_relocate (objfile, new_offsets) | |
521 | struct objfile *objfile; | |
522 | struct section_offsets *new_offsets; | |
523 | { | |
d4f3574e SS |
524 | struct section_offsets *delta = |
525 | (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); | |
c906108c SS |
526 | |
527 | { | |
528 | int i; | |
529 | int something_changed = 0; | |
530 | for (i = 0; i < objfile->num_sections; ++i) | |
531 | { | |
532 | ANOFFSET (delta, i) = | |
533 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); | |
534 | if (ANOFFSET (delta, i) != 0) | |
535 | something_changed = 1; | |
536 | } | |
537 | if (!something_changed) | |
538 | return; | |
539 | } | |
540 | ||
541 | /* OK, get all the symtabs. */ | |
542 | { | |
543 | struct symtab *s; | |
544 | ||
545 | ALL_OBJFILE_SYMTABS (objfile, s) | |
c5aa993b JM |
546 | { |
547 | struct linetable *l; | |
548 | struct blockvector *bv; | |
549 | int i; | |
550 | ||
551 | /* First the line table. */ | |
552 | l = LINETABLE (s); | |
553 | if (l) | |
554 | { | |
555 | for (i = 0; i < l->nitems; ++i) | |
556 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
557 | } | |
c906108c | 558 | |
c5aa993b JM |
559 | /* Don't relocate a shared blockvector more than once. */ |
560 | if (!s->primary) | |
561 | continue; | |
c906108c | 562 | |
c5aa993b JM |
563 | bv = BLOCKVECTOR (s); |
564 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) | |
565 | { | |
566 | struct block *b; | |
567 | int j; | |
568 | ||
569 | b = BLOCKVECTOR_BLOCK (bv, i); | |
570 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
571 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); | |
572 | ||
573 | for (j = 0; j < BLOCK_NSYMS (b); ++j) | |
574 | { | |
575 | struct symbol *sym = BLOCK_SYM (b, j); | |
576 | /* The RS6000 code from which this was taken skipped | |
577 | any symbols in STRUCT_NAMESPACE or UNDEF_NAMESPACE. | |
578 | But I'm leaving out that test, on the theory that | |
579 | they can't possibly pass the tests below. */ | |
580 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
581 | || SYMBOL_CLASS (sym) == LOC_STATIC | |
582 | || SYMBOL_CLASS (sym) == LOC_INDIRECT) | |
583 | && SYMBOL_SECTION (sym) >= 0) | |
584 | { | |
585 | SYMBOL_VALUE_ADDRESS (sym) += | |
586 | ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
587 | } | |
c906108c | 588 | #ifdef MIPS_EFI_SYMBOL_NAME |
c5aa993b | 589 | /* Relocate Extra Function Info for ecoff. */ |
c906108c | 590 | |
c5aa993b JM |
591 | else if (SYMBOL_CLASS (sym) == LOC_CONST |
592 | && SYMBOL_NAMESPACE (sym) == LABEL_NAMESPACE | |
593 | && STRCMP (SYMBOL_NAME (sym), MIPS_EFI_SYMBOL_NAME) == 0) | |
594 | ecoff_relocate_efi (sym, ANOFFSET (delta, | |
c906108c SS |
595 | s->block_line_section)); |
596 | #endif | |
c5aa993b JM |
597 | } |
598 | } | |
599 | } | |
c906108c SS |
600 | } |
601 | ||
602 | { | |
603 | struct partial_symtab *p; | |
604 | ||
605 | ALL_OBJFILE_PSYMTABS (objfile, p) | |
c5aa993b JM |
606 | { |
607 | p->textlow += ANOFFSET (delta, SECT_OFF_TEXT); | |
608 | p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT); | |
609 | } | |
c906108c SS |
610 | } |
611 | ||
612 | { | |
613 | struct partial_symbol **psym; | |
614 | ||
615 | for (psym = objfile->global_psymbols.list; | |
616 | psym < objfile->global_psymbols.next; | |
617 | psym++) | |
618 | if (SYMBOL_SECTION (*psym) >= 0) | |
c5aa993b | 619 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, |
c906108c SS |
620 | SYMBOL_SECTION (*psym)); |
621 | for (psym = objfile->static_psymbols.list; | |
622 | psym < objfile->static_psymbols.next; | |
623 | psym++) | |
624 | if (SYMBOL_SECTION (*psym) >= 0) | |
c5aa993b | 625 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, |
c906108c SS |
626 | SYMBOL_SECTION (*psym)); |
627 | } | |
628 | ||
629 | { | |
630 | struct minimal_symbol *msym; | |
631 | ALL_OBJFILE_MSYMBOLS (objfile, msym) | |
632 | if (SYMBOL_SECTION (msym) >= 0) | |
c5aa993b | 633 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); |
c906108c SS |
634 | } |
635 | /* Relocating different sections by different amounts may cause the symbols | |
636 | to be out of order. */ | |
637 | msymbols_sort (objfile); | |
638 | ||
639 | { | |
640 | int i; | |
641 | for (i = 0; i < objfile->num_sections; ++i) | |
642 | ANOFFSET (objfile->section_offsets, i) = ANOFFSET (new_offsets, i); | |
643 | } | |
644 | ||
645 | { | |
646 | struct obj_section *s; | |
647 | bfd *abfd; | |
648 | ||
649 | abfd = objfile->obfd; | |
650 | ||
96baa820 | 651 | ALL_OBJFILE_OSECTIONS (objfile, s) |
c906108c SS |
652 | { |
653 | flagword flags; | |
654 | ||
655 | flags = bfd_get_section_flags (abfd, s->the_bfd_section); | |
656 | ||
657 | if (flags & SEC_CODE) | |
658 | { | |
c5aa993b | 659 | s->addr += ANOFFSET (delta, SECT_OFF_TEXT); |
c906108c SS |
660 | s->endaddr += ANOFFSET (delta, SECT_OFF_TEXT); |
661 | } | |
662 | else if (flags & (SEC_DATA | SEC_LOAD)) | |
663 | { | |
c5aa993b | 664 | s->addr += ANOFFSET (delta, SECT_OFF_DATA); |
c906108c SS |
665 | s->endaddr += ANOFFSET (delta, SECT_OFF_DATA); |
666 | } | |
667 | else if (flags & SEC_ALLOC) | |
668 | { | |
c5aa993b | 669 | s->addr += ANOFFSET (delta, SECT_OFF_BSS); |
c906108c SS |
670 | s->endaddr += ANOFFSET (delta, SECT_OFF_BSS); |
671 | } | |
672 | } | |
673 | } | |
674 | ||
c5aa993b | 675 | if (objfile->ei.entry_point != ~(CORE_ADDR) 0) |
c906108c SS |
676 | objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT); |
677 | ||
678 | if (objfile->ei.entry_func_lowpc != INVALID_ENTRY_LOWPC) | |
679 | { | |
c5aa993b | 680 | objfile->ei.entry_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); |
c906108c SS |
681 | objfile->ei.entry_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT); |
682 | } | |
683 | ||
684 | if (objfile->ei.entry_file_lowpc != INVALID_ENTRY_LOWPC) | |
685 | { | |
c5aa993b | 686 | objfile->ei.entry_file_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); |
c906108c SS |
687 | objfile->ei.entry_file_highpc += ANOFFSET (delta, SECT_OFF_TEXT); |
688 | } | |
689 | ||
690 | if (objfile->ei.main_func_lowpc != INVALID_ENTRY_LOWPC) | |
691 | { | |
c5aa993b | 692 | objfile->ei.main_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); |
c906108c SS |
693 | objfile->ei.main_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT); |
694 | } | |
695 | ||
696 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
697 | breakpoint_re_set (); | |
698 | } | |
699 | \f | |
700 | /* Many places in gdb want to test just to see if we have any partial | |
701 | symbols available. This function returns zero if none are currently | |
702 | available, nonzero otherwise. */ | |
703 | ||
704 | int | |
705 | have_partial_symbols () | |
706 | { | |
707 | struct objfile *ofp; | |
708 | ||
709 | ALL_OBJFILES (ofp) | |
c5aa993b JM |
710 | { |
711 | if (ofp->psymtabs != NULL) | |
712 | { | |
713 | return 1; | |
714 | } | |
715 | } | |
c906108c SS |
716 | return 0; |
717 | } | |
718 | ||
719 | /* Many places in gdb want to test just to see if we have any full | |
720 | symbols available. This function returns zero if none are currently | |
721 | available, nonzero otherwise. */ | |
722 | ||
723 | int | |
724 | have_full_symbols () | |
725 | { | |
726 | struct objfile *ofp; | |
727 | ||
728 | ALL_OBJFILES (ofp) | |
c5aa993b JM |
729 | { |
730 | if (ofp->symtabs != NULL) | |
731 | { | |
732 | return 1; | |
733 | } | |
734 | } | |
c906108c SS |
735 | return 0; |
736 | } | |
737 | ||
738 | ||
739 | /* This operations deletes all objfile entries that represent solibs that | |
740 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
741 | command. | |
c5aa993b | 742 | */ |
c906108c SS |
743 | void |
744 | objfile_purge_solibs () | |
745 | { | |
c5aa993b JM |
746 | struct objfile *objf; |
747 | struct objfile *temp; | |
c906108c SS |
748 | |
749 | ALL_OBJFILES_SAFE (objf, temp) | |
750 | { | |
751 | /* We assume that the solib package has been purged already, or will | |
752 | be soon. | |
c5aa993b JM |
753 | */ |
754 | if (!objf->user_loaded && objf->is_solib) | |
c906108c SS |
755 | free_objfile (objf); |
756 | } | |
757 | } | |
758 | ||
759 | ||
760 | /* Many places in gdb want to test just to see if we have any minimal | |
761 | symbols available. This function returns zero if none are currently | |
762 | available, nonzero otherwise. */ | |
763 | ||
764 | int | |
765 | have_minimal_symbols () | |
766 | { | |
767 | struct objfile *ofp; | |
768 | ||
769 | ALL_OBJFILES (ofp) | |
c5aa993b JM |
770 | { |
771 | if (ofp->msymbols != NULL) | |
772 | { | |
773 | return 1; | |
774 | } | |
775 | } | |
c906108c SS |
776 | return 0; |
777 | } | |
778 | ||
779 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
780 | ||
781 | /* Given the name of a mapped symbol file in SYMSFILENAME, and the timestamp | |
782 | of the corresponding symbol file in MTIME, try to open an existing file | |
783 | with the name SYMSFILENAME and verify it is more recent than the base | |
784 | file by checking it's timestamp against MTIME. | |
785 | ||
786 | If SYMSFILENAME does not exist (or can't be stat'd), simply returns -1. | |
787 | ||
788 | If SYMSFILENAME does exist, but is out of date, we check to see if the | |
789 | user has specified creation of a mapped file. If so, we don't issue | |
790 | any warning message because we will be creating a new mapped file anyway, | |
791 | overwriting the old one. If not, then we issue a warning message so that | |
792 | the user will know why we aren't using this existing mapped symbol file. | |
793 | In either case, we return -1. | |
794 | ||
795 | If SYMSFILENAME does exist and is not out of date, but can't be opened for | |
796 | some reason, then prints an appropriate system error message and returns -1. | |
797 | ||
798 | Otherwise, returns the open file descriptor. */ | |
799 | ||
800 | static int | |
801 | open_existing_mapped_file (symsfilename, mtime, mapped) | |
802 | char *symsfilename; | |
803 | long mtime; | |
804 | int mapped; | |
805 | { | |
806 | int fd = -1; | |
807 | struct stat sbuf; | |
808 | ||
809 | if (stat (symsfilename, &sbuf) == 0) | |
810 | { | |
811 | if (sbuf.st_mtime < mtime) | |
812 | { | |
813 | if (!mapped) | |
814 | { | |
815 | warning ("mapped symbol file `%s' is out of date, ignored it", | |
816 | symsfilename); | |
817 | } | |
818 | } | |
819 | else if ((fd = open (symsfilename, O_RDWR)) < 0) | |
820 | { | |
821 | if (error_pre_print) | |
822 | { | |
823 | printf_unfiltered (error_pre_print); | |
824 | } | |
825 | print_sys_errmsg (symsfilename, errno); | |
826 | } | |
827 | } | |
828 | return (fd); | |
829 | } | |
830 | ||
831 | /* Look for a mapped symbol file that corresponds to FILENAME and is more | |
832 | recent than MTIME. If MAPPED is nonzero, the user has asked that gdb | |
833 | use a mapped symbol file for this file, so create a new one if one does | |
834 | not currently exist. | |
835 | ||
836 | If found, then return an open file descriptor for the file, otherwise | |
837 | return -1. | |
838 | ||
839 | This routine is responsible for implementing the policy that generates | |
840 | the name of the mapped symbol file from the name of a file containing | |
841 | symbols that gdb would like to read. Currently this policy is to append | |
842 | ".syms" to the name of the file. | |
843 | ||
844 | This routine is also responsible for implementing the policy that | |
845 | determines where the mapped symbol file is found (the search path). | |
846 | This policy is that when reading an existing mapped file, a file of | |
847 | the correct name in the current directory takes precedence over a | |
848 | file of the correct name in the same directory as the symbol file. | |
849 | When creating a new mapped file, it is always created in the current | |
850 | directory. This helps to minimize the chances of a user unknowingly | |
851 | creating big mapped files in places like /bin and /usr/local/bin, and | |
852 | allows a local copy to override a manually installed global copy (in | |
853 | /bin for example). */ | |
854 | ||
855 | static int | |
856 | open_mapped_file (filename, mtime, mapped) | |
857 | char *filename; | |
858 | long mtime; | |
859 | int mapped; | |
860 | { | |
861 | int fd; | |
862 | char *symsfilename; | |
863 | ||
864 | /* First try to open an existing file in the current directory, and | |
865 | then try the directory where the symbol file is located. */ | |
866 | ||
867 | symsfilename = concat ("./", basename (filename), ".syms", (char *) NULL); | |
868 | if ((fd = open_existing_mapped_file (symsfilename, mtime, mapped)) < 0) | |
869 | { | |
870 | free (symsfilename); | |
871 | symsfilename = concat (filename, ".syms", (char *) NULL); | |
872 | fd = open_existing_mapped_file (symsfilename, mtime, mapped); | |
873 | } | |
874 | ||
875 | /* If we don't have an open file by now, then either the file does not | |
876 | already exist, or the base file has changed since it was created. In | |
877 | either case, if the user has specified use of a mapped file, then | |
878 | create a new mapped file, truncating any existing one. If we can't | |
879 | create one, print a system error message saying why we can't. | |
880 | ||
881 | By default the file is rw for everyone, with the user's umask taking | |
882 | care of turning off the permissions the user wants off. */ | |
883 | ||
884 | if ((fd < 0) && mapped) | |
885 | { | |
886 | free (symsfilename); | |
887 | symsfilename = concat ("./", basename (filename), ".syms", | |
888 | (char *) NULL); | |
889 | if ((fd = open (symsfilename, O_RDWR | O_CREAT | O_TRUNC, 0666)) < 0) | |
890 | { | |
891 | if (error_pre_print) | |
892 | { | |
893 | printf_unfiltered (error_pre_print); | |
894 | } | |
895 | print_sys_errmsg (symsfilename, errno); | |
896 | } | |
897 | } | |
898 | ||
899 | free (symsfilename); | |
900 | return (fd); | |
901 | } | |
902 | ||
903 | static PTR | |
904 | map_to_file (fd) | |
905 | int fd; | |
906 | { | |
907 | PTR md; | |
908 | CORE_ADDR mapto; | |
909 | ||
910 | md = mmalloc_attach (fd, (PTR) 0); | |
911 | if (md != NULL) | |
912 | { | |
913 | mapto = (CORE_ADDR) mmalloc_getkey (md, 1); | |
914 | md = mmalloc_detach (md); | |
915 | if (md != NULL) | |
916 | { | |
917 | /* FIXME: should figure out why detach failed */ | |
918 | md = NULL; | |
919 | } | |
920 | else if (mapto != (CORE_ADDR) NULL) | |
921 | { | |
922 | /* This mapping file needs to be remapped at "mapto" */ | |
923 | md = mmalloc_attach (fd, (PTR) mapto); | |
924 | } | |
925 | else | |
926 | { | |
927 | /* This is a freshly created mapping file. */ | |
928 | mapto = (CORE_ADDR) mmalloc_findbase (20 * 1024 * 1024); | |
929 | if (mapto != 0) | |
930 | { | |
931 | /* To avoid reusing the freshly created mapping file, at the | |
c5aa993b JM |
932 | address selected by mmap, we must truncate it before trying |
933 | to do an attach at the address we want. */ | |
c906108c SS |
934 | ftruncate (fd, 0); |
935 | md = mmalloc_attach (fd, (PTR) mapto); | |
936 | if (md != NULL) | |
937 | { | |
938 | mmalloc_setkey (md, 1, (PTR) mapto); | |
939 | } | |
940 | } | |
941 | } | |
942 | } | |
943 | return (md); | |
944 | } | |
945 | ||
c5aa993b | 946 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c SS |
947 | |
948 | /* Returns a section whose range includes PC and SECTION, | |
949 | or NULL if none found. Note the distinction between the return type, | |
950 | struct obj_section (which is defined in gdb), and the input type | |
951 | struct sec (which is a bfd-defined data type). The obj_section | |
952 | contains a pointer to the bfd struct sec section. */ | |
953 | ||
954 | struct obj_section * | |
955 | find_pc_sect_section (pc, section) | |
956 | CORE_ADDR pc; | |
957 | struct sec *section; | |
958 | { | |
959 | struct obj_section *s; | |
960 | struct objfile *objfile; | |
c5aa993b | 961 | |
96baa820 | 962 | ALL_OBJSECTIONS (objfile, s) |
c5aa993b JM |
963 | if ((section == 0 || section == s->the_bfd_section) && |
964 | s->addr <= pc && pc < s->endaddr) | |
c5aa993b | 965 | return (s); |
c906108c | 966 | |
c5aa993b | 967 | return (NULL); |
c906108c SS |
968 | } |
969 | ||
970 | /* Returns a section whose range includes PC or NULL if none found. | |
971 | Backward compatibility, no section. */ | |
972 | ||
973 | struct obj_section * | |
c5aa993b | 974 | find_pc_section (pc) |
c906108c SS |
975 | CORE_ADDR pc; |
976 | { | |
977 | return find_pc_sect_section (pc, find_pc_mapped_section (pc)); | |
978 | } | |
c5aa993b | 979 | |
c906108c SS |
980 | |
981 | /* In SVR4, we recognize a trampoline by it's section name. | |
982 | That is, if the pc is in a section named ".plt" then we are in | |
983 | a trampoline. */ | |
984 | ||
985 | int | |
c5aa993b | 986 | in_plt_section (pc, name) |
c906108c SS |
987 | CORE_ADDR pc; |
988 | char *name; | |
989 | { | |
990 | struct obj_section *s; | |
991 | int retval = 0; | |
c5aa993b JM |
992 | |
993 | s = find_pc_section (pc); | |
994 | ||
c906108c SS |
995 | retval = (s != NULL |
996 | && s->the_bfd_section->name != NULL | |
997 | && STREQ (s->the_bfd_section->name, ".plt")); | |
c5aa993b | 998 | return (retval); |
c906108c | 999 | } |
7be570e7 JM |
1000 | |
1001 | /* Return nonzero if NAME is in the import list of OBJFILE. Else | |
1002 | return zero. */ | |
1003 | ||
1004 | int | |
1005 | is_in_import_list (name, objfile) | |
1006 | char *name; | |
1007 | struct objfile *objfile; | |
1008 | { | |
1009 | register int i; | |
1010 | ||
1011 | if (!objfile || !name || !*name) | |
1012 | return 0; | |
1013 | ||
1014 | for (i = 0; i < objfile->import_list_size; i++) | |
1015 | if (objfile->import_list[i] && STREQ (name, objfile->import_list[i])) | |
1016 | return 1; | |
1017 | return 0; | |
1018 | } | |
1019 |