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1ab3bf1b JG |
1 | /* GDB routines for manipulating objfiles. |
2 | Copyright 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | /* This file contains support routines for creating, manipulating, and | |
22 | destroying objfile structures. */ | |
23 | ||
1ab3bf1b JG |
24 | #include "defs.h" |
25 | #include "bfd.h" /* Binary File Description */ | |
26 | #include "symtab.h" | |
27 | #include "symfile.h" | |
5e2e79f8 | 28 | #include "objfiles.h" |
610a7e74 | 29 | #include "gdb-stabs.h" |
c5198d93 | 30 | #include "target.h" |
1ab3bf1b | 31 | |
318bf84f FF |
32 | #include <sys/types.h> |
33 | #include <sys/stat.h> | |
34 | #include <fcntl.h> | |
1ab3bf1b JG |
35 | #include <obstack.h> |
36 | ||
318bf84f FF |
37 | /* Prototypes for local functions */ |
38 | ||
1867b3be FF |
39 | #if !defined(NO_MMALLOC) && defined(HAVE_MMAP) |
40 | ||
41 | static int | |
42 | open_existing_mapped_file PARAMS ((char *, long, int)); | |
43 | ||
318bf84f | 44 | static int |
b0246b3b | 45 | open_mapped_file PARAMS ((char *filename, long mtime, int mapped)); |
318bf84f FF |
46 | |
47 | static CORE_ADDR | |
48 | map_to_address PARAMS ((void)); | |
49 | ||
1867b3be FF |
50 | #endif /* !defined(NO_MMALLOC) && defined(HAVE_MMAP) */ |
51 | ||
52 | /* Message to be printed before the error message, when an error occurs. */ | |
53 | ||
54 | extern char *error_pre_print; | |
55 | ||
5e2e79f8 FF |
56 | /* Externally visible variables that are owned by this module. |
57 | See declarations in objfile.h for more info. */ | |
1ab3bf1b JG |
58 | |
59 | struct objfile *object_files; /* Linked list of all objfiles */ | |
5e2e79f8 FF |
60 | struct objfile *current_objfile; /* For symbol file being read in */ |
61 | struct objfile *symfile_objfile; /* Main symbol table loaded from */ | |
62 | ||
318bf84f | 63 | int mapped_symbol_files; /* Try to use mapped symbol files */ |
1ab3bf1b | 64 | |
73d0fc78 RP |
65 | /* Locate all mappable sections of a BFD file. |
66 | objfile_p_char is a char * to get it through | |
67 | bfd_map_over_sections; we cast it back to its proper type. */ | |
68 | ||
69 | static void | |
70 | add_to_objfile_sections (abfd, asect, objfile_p_char) | |
71 | bfd *abfd; | |
72 | sec_ptr asect; | |
73 | PTR objfile_p_char; | |
74 | { | |
75 | struct objfile *objfile = (struct objfile *) objfile_p_char; | |
76 | struct obj_section section; | |
77 | flagword aflag; | |
78 | ||
79 | aflag = bfd_get_section_flags (abfd, asect); | |
80 | /* FIXME, we need to handle BSS segment here...it alloc's but doesn't load */ | |
81 | if (!(aflag & SEC_LOAD)) | |
82 | return; | |
83 | if (0 == bfd_section_size (abfd, asect)) | |
84 | return; | |
85 | section.offset = 0; | |
4365c36c | 86 | section.objfile = objfile; |
73d0fc78 RP |
87 | section.sec_ptr = asect; |
88 | section.addr = bfd_section_vma (abfd, asect); | |
89 | section.endaddr = section.addr + bfd_section_size (abfd, asect); | |
90 | obstack_grow (&objfile->psymbol_obstack, §ion, sizeof(section)); | |
5573d7d4 | 91 | objfile->sections_end = (struct obj_section *) (((unsigned long) objfile->sections_end) + 1); |
73d0fc78 RP |
92 | } |
93 | ||
94 | /* Builds a section table for OBJFILE. | |
95 | Returns 0 if OK, 1 on error. */ | |
96 | ||
97 | static int | |
98 | build_objfile_section_table (objfile) | |
99 | struct objfile *objfile; | |
100 | { | |
101 | if (objfile->sections) | |
102 | abort(); | |
103 | ||
104 | objfile->sections_end = 0; | |
105 | bfd_map_over_sections (objfile->obfd, add_to_objfile_sections, (char *)objfile); | |
ccd87bf2 JK |
106 | objfile->sections = (struct obj_section *) |
107 | obstack_finish (&objfile->psymbol_obstack); | |
5573d7d4 | 108 | objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end; |
73d0fc78 RP |
109 | return(0); |
110 | } | |
111 | ||
b0246b3b FF |
112 | /* Given a pointer to an initialized bfd (ABFD) and a flag that indicates |
113 | whether or not an objfile is to be mapped (MAPPED), allocate a new objfile | |
114 | struct, fill it in as best we can, link it into the list of all known | |
115 | objfiles, and return a pointer to the new objfile struct. */ | |
1ab3bf1b JG |
116 | |
117 | struct objfile * | |
b0246b3b | 118 | allocate_objfile (abfd, mapped) |
1ab3bf1b | 119 | bfd *abfd; |
318bf84f | 120 | int mapped; |
1ab3bf1b | 121 | { |
318bf84f FF |
122 | struct objfile *objfile = NULL; |
123 | int fd; | |
124 | void *md; | |
125 | CORE_ADDR mapto; | |
126 | ||
127 | mapped |= mapped_symbol_files; | |
128 | ||
129 | #if !defined(NO_MMALLOC) && defined(HAVE_MMAP) | |
130 | ||
131 | /* If we can support mapped symbol files, try to open/reopen the mapped file | |
132 | that corresponds to the file from which we wish to read symbols. If the | |
133 | objfile is to be mapped, we must malloc the structure itself using the | |
134 | mmap version, and arrange that all memory allocation for the objfile uses | |
135 | the mmap routines. If we are reusing an existing mapped file, from which | |
136 | we get our objfile pointer, we have to make sure that we update the | |
137 | pointers to the alloc/free functions in the obstack, in case these | |
138 | functions have moved within the current gdb. */ | |
139 | ||
b0246b3b FF |
140 | fd = open_mapped_file (bfd_get_filename (abfd), bfd_get_mtime (abfd), |
141 | mapped); | |
318bf84f FF |
142 | if (fd >= 0) |
143 | { | |
b0246b3b | 144 | if (((mapto = map_to_address ()) == 0) || |
318bf84f FF |
145 | ((md = mmalloc_attach (fd, (void *) mapto)) == NULL)) |
146 | { | |
4ed3a9ea | 147 | close (fd); |
318bf84f FF |
148 | } |
149 | else if ((objfile = (struct objfile *) mmalloc_getkey (md, 0)) != NULL) | |
150 | { | |
3624c875 FF |
151 | /* Update memory corruption handler function addresses. */ |
152 | init_malloc (md); | |
318bf84f | 153 | objfile -> md = md; |
2d6d969c | 154 | objfile -> mmfd = fd; |
318bf84f FF |
155 | /* Update pointers to functions to *our* copies */ |
156 | obstack_chunkfun (&objfile -> psymbol_obstack, xmmalloc); | |
157 | obstack_freefun (&objfile -> psymbol_obstack, mfree); | |
158 | obstack_chunkfun (&objfile -> symbol_obstack, xmmalloc); | |
159 | obstack_freefun (&objfile -> symbol_obstack, mfree); | |
160 | obstack_chunkfun (&objfile -> type_obstack, xmmalloc); | |
161 | obstack_freefun (&objfile -> type_obstack, mfree); | |
6c316cfd FF |
162 | /* If already in objfile list, unlink it. */ |
163 | unlink_objfile (objfile); | |
164 | /* Forget things specific to a particular gdb, may have changed. */ | |
165 | objfile -> sf = NULL; | |
318bf84f FF |
166 | } |
167 | else | |
168 | { | |
3624c875 FF |
169 | /* Set up to detect internal memory corruption. MUST be done before |
170 | the first malloc. See comments in init_malloc() and mmcheck(). */ | |
171 | init_malloc (md); | |
318bf84f | 172 | objfile = (struct objfile *) xmmalloc (md, sizeof (struct objfile)); |
4ed3a9ea | 173 | memset (objfile, 0, sizeof (struct objfile)); |
318bf84f | 174 | objfile -> md = md; |
2d6d969c | 175 | objfile -> mmfd = fd; |
318bf84f FF |
176 | objfile -> flags |= OBJF_MAPPED; |
177 | mmalloc_setkey (objfile -> md, 0, objfile); | |
cd46ffad FF |
178 | obstack_specify_allocation_with_arg (&objfile -> psymbol_obstack, |
179 | 0, 0, xmmalloc, mfree, | |
180 | objfile -> md); | |
181 | obstack_specify_allocation_with_arg (&objfile -> symbol_obstack, | |
182 | 0, 0, xmmalloc, mfree, | |
183 | objfile -> md); | |
184 | obstack_specify_allocation_with_arg (&objfile -> type_obstack, | |
185 | 0, 0, xmmalloc, mfree, | |
186 | objfile -> md); | |
318bf84f FF |
187 | } |
188 | } | |
189 | ||
190 | if (mapped && (objfile == NULL)) | |
191 | { | |
b0246b3b FF |
192 | warning ("symbol table for '%s' will not be mapped", |
193 | bfd_get_filename (abfd)); | |
318bf84f | 194 | } |
1ab3bf1b | 195 | |
318bf84f | 196 | #else /* defined(NO_MMALLOC) || !defined(HAVE_MMAP) */ |
1ab3bf1b | 197 | |
318bf84f | 198 | if (mapped) |
1ab3bf1b | 199 | { |
318bf84f FF |
200 | warning ("this version of gdb does not support mapped symbol tables."); |
201 | ||
202 | /* Turn off the global flag so we don't try to do mapped symbol tables | |
203 | any more, which shuts up gdb unless the user specifically gives the | |
204 | "mapped" keyword again. */ | |
205 | ||
206 | mapped_symbol_files = 0; | |
1ab3bf1b | 207 | } |
318bf84f FF |
208 | |
209 | #endif /* !defined(NO_MMALLOC) && defined(HAVE_MMAP) */ | |
210 | ||
211 | /* If we don't support mapped symbol files, didn't ask for the file to be | |
212 | mapped, or failed to open the mapped file for some reason, then revert | |
213 | back to an unmapped objfile. */ | |
214 | ||
215 | if (objfile == NULL) | |
1ab3bf1b JG |
216 | { |
217 | objfile = (struct objfile *) xmalloc (sizeof (struct objfile)); | |
4ed3a9ea | 218 | memset (objfile, 0, sizeof (struct objfile)); |
318bf84f | 219 | objfile -> md = NULL; |
cd46ffad FF |
220 | obstack_specify_allocation (&objfile -> psymbol_obstack, 0, 0, xmalloc, |
221 | free); | |
222 | obstack_specify_allocation (&objfile -> symbol_obstack, 0, 0, xmalloc, | |
223 | free); | |
224 | obstack_specify_allocation (&objfile -> type_obstack, 0, 0, xmalloc, | |
225 | free); | |
1ab3bf1b JG |
226 | } |
227 | ||
b0246b3b FF |
228 | /* Update the per-objfile information that comes from the bfd, ensuring |
229 | that any data that is reference is saved in the per-objfile data | |
230 | region. */ | |
1ab3bf1b JG |
231 | |
232 | objfile -> obfd = abfd; | |
2d6d969c FF |
233 | if (objfile -> name != NULL) |
234 | { | |
235 | mfree (objfile -> md, objfile -> name); | |
236 | } | |
b0246b3b | 237 | objfile -> name = mstrsave (objfile -> md, bfd_get_filename (abfd)); |
1ab3bf1b JG |
238 | objfile -> mtime = bfd_get_mtime (abfd); |
239 | ||
73d0fc78 RP |
240 | /* Build section table. */ |
241 | ||
242 | if (build_objfile_section_table (objfile)) | |
243 | { | |
244 | error ("Can't find the file sections in `%s': %s", | |
245 | objfile -> name, bfd_errmsg (bfd_error)); | |
246 | } | |
247 | ||
1ab3bf1b JG |
248 | /* Push this file onto the head of the linked list of other such files. */ |
249 | ||
250 | objfile -> next = object_files; | |
251 | object_files = objfile; | |
252 | ||
253 | return (objfile); | |
254 | } | |
255 | ||
6c316cfd FF |
256 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the |
257 | list. | |
258 | ||
259 | It is not a bug, or error, to call this function if OBJFILE is not known | |
260 | to be in the current list. This is done in the case of mapped objfiles, | |
261 | for example, just to ensure that the mapped objfile doesn't appear twice | |
262 | in the list. Since the list is threaded, linking in a mapped objfile | |
263 | twice would create a circular list. | |
264 | ||
265 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
266 | unlinking it, just to ensure that we have completely severed any linkages | |
267 | between the OBJFILE and the list. */ | |
268 | ||
269 | void | |
270 | unlink_objfile (objfile) | |
271 | struct objfile *objfile; | |
272 | { | |
273 | struct objfile** objpp; | |
274 | ||
275 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp) -> next)) | |
276 | { | |
277 | if (*objpp == objfile) | |
278 | { | |
279 | *objpp = (*objpp) -> next; | |
280 | objfile -> next = NULL; | |
281 | break; | |
282 | } | |
283 | } | |
284 | } | |
285 | ||
1ab3bf1b JG |
286 | |
287 | /* Destroy an objfile and all the symtabs and psymtabs under it. Note | |
288 | that as much as possible is allocated on the symbol_obstack and | |
80d68b1d FF |
289 | psymbol_obstack, so that the memory can be efficiently freed. |
290 | ||
291 | Things which we do NOT free because they are not in malloc'd memory | |
292 | or not in memory specific to the objfile include: | |
293 | ||
294 | objfile -> sf | |
295 | ||
2d6d969c FF |
296 | FIXME: If the objfile is using reusable symbol information (via mmalloc), |
297 | then we need to take into account the fact that more than one process | |
298 | may be using the symbol information at the same time (when mmalloc is | |
299 | extended to support cooperative locking). When more than one process | |
300 | is using the mapped symbol info, we need to be more careful about when | |
301 | we free objects in the reusable area. */ | |
1ab3bf1b JG |
302 | |
303 | void | |
304 | free_objfile (objfile) | |
305 | struct objfile *objfile; | |
306 | { | |
2d6d969c FF |
307 | int mmfd; |
308 | ||
309 | /* First do any symbol file specific actions required when we are | |
310 | finished with a particular symbol file. Note that if the objfile | |
311 | is using reusable symbol information (via mmalloc) then each of | |
312 | these routines is responsible for doing the correct thing, either | |
313 | freeing things which are valid only during this particular gdb | |
314 | execution, or leaving them to be reused during the next one. */ | |
1ab3bf1b | 315 | |
80d68b1d FF |
316 | if (objfile -> sf != NULL) |
317 | { | |
318 | (*objfile -> sf -> sym_finish) (objfile); | |
319 | } | |
2d6d969c FF |
320 | |
321 | /* We always close the bfd. */ | |
322 | ||
80d68b1d | 323 | if (objfile -> obfd != NULL) |
1ab3bf1b | 324 | { |
346168a2 | 325 | char *name = bfd_get_filename (objfile->obfd); |
1ab3bf1b | 326 | bfd_close (objfile -> obfd); |
346168a2 | 327 | free (name); |
1ab3bf1b JG |
328 | } |
329 | ||
2d6d969c | 330 | /* Remove it from the chain of all objfiles. */ |
1ab3bf1b | 331 | |
6c316cfd | 332 | unlink_objfile (objfile); |
1ab3bf1b | 333 | |
1ab3bf1b JG |
334 | /* Before the symbol table code was redone to make it easier to |
335 | selectively load and remove information particular to a specific | |
336 | linkage unit, gdb used to do these things whenever the monolithic | |
337 | symbol table was blown away. How much still needs to be done | |
338 | is unknown, but we play it safe for now and keep each action until | |
339 | it is shown to be no longer needed. */ | |
340 | ||
1ab3bf1b JG |
341 | #if defined (CLEAR_SOLIB) |
342 | CLEAR_SOLIB (); | |
c5198d93 JK |
343 | /* CLEAR_SOLIB closes the bfd's for any shared libraries. But |
344 | the to_sections for a core file might refer to those bfd's. So | |
345 | detach any core file. */ | |
346 | { | |
347 | struct target_ops *t = find_core_target (); | |
348 | if (t != NULL) | |
349 | (t->to_detach) (NULL, 0); | |
350 | } | |
1ab3bf1b JG |
351 | #endif |
352 | clear_pc_function_cache (); | |
353 | ||
2d6d969c FF |
354 | /* The last thing we do is free the objfile struct itself for the |
355 | non-reusable case, or detach from the mapped file for the reusable | |
356 | case. Note that the mmalloc_detach or the mfree is the last thing | |
357 | we can do with this objfile. */ | |
1ab3bf1b | 358 | |
55b3ef9a FF |
359 | #if !defined(NO_MMALLOC) && defined(HAVE_MMAP) |
360 | ||
2d6d969c FF |
361 | if (objfile -> flags & OBJF_MAPPED) |
362 | { | |
363 | /* Remember the fd so we can close it. We can't close it before | |
364 | doing the detach, and after the detach the objfile is gone. */ | |
365 | mmfd = objfile -> mmfd; | |
366 | mmalloc_detach (objfile -> md); | |
55b3ef9a | 367 | objfile = NULL; |
4ed3a9ea | 368 | close (mmfd); |
2d6d969c | 369 | } |
55b3ef9a FF |
370 | |
371 | #endif /* !defined(NO_MMALLOC) && defined(HAVE_MMAP) */ | |
372 | ||
373 | /* If we still have an objfile, then either we don't support reusable | |
374 | objfiles or this one was not reusable. So free it normally. */ | |
375 | ||
376 | if (objfile != NULL) | |
2d6d969c FF |
377 | { |
378 | if (objfile -> name != NULL) | |
379 | { | |
380 | mfree (objfile -> md, objfile -> name); | |
381 | } | |
346168a2 JG |
382 | if (objfile->global_psymbols.list) |
383 | mfree (objfile->md, objfile->global_psymbols.list); | |
384 | if (objfile->static_psymbols.list) | |
385 | mfree (objfile->md, objfile->static_psymbols.list); | |
2d6d969c FF |
386 | /* Free the obstacks for non-reusable objfiles */ |
387 | obstack_free (&objfile -> psymbol_obstack, 0); | |
388 | obstack_free (&objfile -> symbol_obstack, 0); | |
389 | obstack_free (&objfile -> type_obstack, 0); | |
390 | mfree (objfile -> md, objfile); | |
55b3ef9a | 391 | objfile = NULL; |
2d6d969c | 392 | } |
1ab3bf1b JG |
393 | } |
394 | ||
cba0d141 | 395 | |
0eb22669 | 396 | /* Free all the object files at once and clean up their users. */ |
cba0d141 JG |
397 | |
398 | void | |
399 | free_all_objfiles () | |
400 | { | |
401 | struct objfile *objfile, *temp; | |
402 | ||
403 | ALL_OBJFILES_SAFE (objfile, temp) | |
404 | { | |
405 | free_objfile (objfile); | |
406 | } | |
0eb22669 | 407 | clear_symtab_users (); |
cba0d141 | 408 | } |
3c02636b JK |
409 | \f |
410 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
411 | entries in new_offsets. */ | |
412 | void | |
413 | objfile_relocate (objfile, new_offsets) | |
414 | struct objfile *objfile; | |
415 | struct section_offsets *new_offsets; | |
416 | { | |
417 | struct section_offsets *delta = (struct section_offsets *) alloca | |
418 | (sizeof (struct section_offsets) | |
419 | + objfile->num_sections * sizeof (delta->offsets)); | |
420 | ||
421 | { | |
422 | int i; | |
423 | int something_changed = 0; | |
424 | for (i = 0; i < objfile->num_sections; ++i) | |
425 | { | |
426 | ANOFFSET (delta, i) = | |
427 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); | |
428 | if (ANOFFSET (delta, i) != 0) | |
429 | something_changed = 1; | |
430 | } | |
431 | if (!something_changed) | |
432 | return; | |
433 | } | |
434 | ||
435 | /* OK, get all the symtabs. */ | |
436 | { | |
437 | struct symtab *s; | |
438 | ||
439 | for (s = objfile->symtabs; s; s = s->next) | |
440 | { | |
441 | struct linetable *l; | |
442 | struct blockvector *bv; | |
443 | int i; | |
444 | ||
445 | /* First the line table. */ | |
446 | l = LINETABLE (s); | |
447 | if (l) | |
448 | { | |
449 | for (i = 0; i < l->nitems; ++i) | |
450 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
451 | } | |
452 | ||
453 | /* Don't relocate a shared blockvector more than once. */ | |
454 | if (!s->primary) | |
455 | continue; | |
456 | ||
457 | bv = BLOCKVECTOR (s); | |
458 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) | |
459 | { | |
460 | struct block *b; | |
461 | int j; | |
462 | ||
463 | b = BLOCKVECTOR_BLOCK (bv, i); | |
464 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
465 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); | |
466 | ||
467 | for (j = 0; j < BLOCK_NSYMS (b); ++j) | |
468 | { | |
469 | struct symbol *sym = BLOCK_SYM (b, j); | |
470 | /* The RS6000 code from which this was taken skipped | |
471 | any symbols in STRUCT_NAMESPACE or UNDEF_NAMESPACE. | |
472 | But I'm leaving out that test, on the theory that | |
473 | they can't possibly pass the tests below. */ | |
474 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
475 | || SYMBOL_CLASS (sym) == LOC_STATIC) | |
476 | && SYMBOL_SECTION (sym) >= 0) | |
477 | { | |
478 | SYMBOL_VALUE_ADDRESS (sym) += | |
479 | ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
480 | } | |
481 | } | |
482 | } | |
483 | } | |
484 | } | |
485 | ||
610a7e74 ILT |
486 | { |
487 | struct partial_symtab *p; | |
488 | ||
489 | ALL_OBJFILE_PSYMTABS (objfile, p) | |
490 | { | |
804506f6 JK |
491 | /* FIXME: specific to symbol readers which use gdb-stabs.h. |
492 | We can only get away with it since objfile_relocate is only | |
493 | used on XCOFF, which lacks psymtabs, and for gdb-stabs.h | |
494 | targets. */ | |
610a7e74 ILT |
495 | p->textlow += ANOFFSET (delta, SECT_OFF_TEXT); |
496 | p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT); | |
497 | } | |
498 | } | |
499 | ||
500 | { | |
501 | struct partial_symbol *psym; | |
502 | ||
503 | for (psym = objfile->global_psymbols.list; | |
504 | psym < objfile->global_psymbols.next; | |
505 | psym++) | |
506 | if (SYMBOL_SECTION (psym) >= 0) | |
507 | SYMBOL_VALUE_ADDRESS (psym) += ANOFFSET (delta, SYMBOL_SECTION (psym)); | |
508 | for (psym = objfile->static_psymbols.list; | |
509 | psym < objfile->static_psymbols.next; | |
510 | psym++) | |
511 | if (SYMBOL_SECTION (psym) >= 0) | |
512 | SYMBOL_VALUE_ADDRESS (psym) += ANOFFSET (delta, SYMBOL_SECTION (psym)); | |
513 | } | |
514 | ||
3c02636b JK |
515 | { |
516 | struct minimal_symbol *msym; | |
517 | ALL_OBJFILE_MSYMBOLS (objfile, msym) | |
610a7e74 ILT |
518 | if (SYMBOL_SECTION (msym) >= 0) |
519 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); | |
3c02636b JK |
520 | } |
521 | ||
522 | { | |
523 | int i; | |
524 | for (i = 0; i < objfile->num_sections; ++i) | |
525 | ANOFFSET (objfile->section_offsets, i) = ANOFFSET (new_offsets, i); | |
526 | } | |
527 | } | |
528 | \f | |
1ab3bf1b JG |
529 | /* Many places in gdb want to test just to see if we have any partial |
530 | symbols available. This function returns zero if none are currently | |
531 | available, nonzero otherwise. */ | |
532 | ||
533 | int | |
534 | have_partial_symbols () | |
535 | { | |
536 | struct objfile *ofp; | |
1ab3bf1b | 537 | |
84ffdec2 | 538 | ALL_OBJFILES (ofp) |
1ab3bf1b JG |
539 | { |
540 | if (ofp -> psymtabs != NULL) | |
541 | { | |
84ffdec2 | 542 | return 1; |
1ab3bf1b JG |
543 | } |
544 | } | |
84ffdec2 | 545 | return 0; |
1ab3bf1b JG |
546 | } |
547 | ||
548 | /* Many places in gdb want to test just to see if we have any full | |
549 | symbols available. This function returns zero if none are currently | |
550 | available, nonzero otherwise. */ | |
551 | ||
552 | int | |
553 | have_full_symbols () | |
554 | { | |
555 | struct objfile *ofp; | |
1ab3bf1b | 556 | |
84ffdec2 | 557 | ALL_OBJFILES (ofp) |
1ab3bf1b JG |
558 | { |
559 | if (ofp -> symtabs != NULL) | |
560 | { | |
84ffdec2 | 561 | return 1; |
1ab3bf1b JG |
562 | } |
563 | } | |
84ffdec2 | 564 | return 0; |
1ab3bf1b JG |
565 | } |
566 | ||
567 | /* Many places in gdb want to test just to see if we have any minimal | |
568 | symbols available. This function returns zero if none are currently | |
569 | available, nonzero otherwise. */ | |
570 | ||
571 | int | |
572 | have_minimal_symbols () | |
573 | { | |
574 | struct objfile *ofp; | |
1ab3bf1b | 575 | |
84ffdec2 | 576 | ALL_OBJFILES (ofp) |
1ab3bf1b JG |
577 | { |
578 | if (ofp -> msymbols != NULL) | |
579 | { | |
84ffdec2 | 580 | return 1; |
1ab3bf1b JG |
581 | } |
582 | } | |
84ffdec2 | 583 | return 0; |
1ab3bf1b JG |
584 | } |
585 | ||
1867b3be FF |
586 | #if !defined(NO_MMALLOC) && defined(HAVE_MMAP) |
587 | ||
588 | /* Given the name of a mapped symbol file in SYMSFILENAME, and the timestamp | |
589 | of the corresponding symbol file in MTIME, try to open an existing file | |
590 | with the name SYMSFILENAME and verify it is more recent than the base | |
591 | file by checking it's timestamp against MTIME. | |
592 | ||
593 | If SYMSFILENAME does not exist (or can't be stat'd), simply returns -1. | |
594 | ||
595 | If SYMSFILENAME does exist, but is out of date, we check to see if the | |
596 | user has specified creation of a mapped file. If so, we don't issue | |
597 | any warning message because we will be creating a new mapped file anyway, | |
598 | overwriting the old one. If not, then we issue a warning message so that | |
599 | the user will know why we aren't using this existing mapped symbol file. | |
600 | In either case, we return -1. | |
601 | ||
602 | If SYMSFILENAME does exist and is not out of date, but can't be opened for | |
603 | some reason, then prints an appropriate system error message and returns -1. | |
604 | ||
605 | Otherwise, returns the open file descriptor. */ | |
606 | ||
607 | static int | |
608 | open_existing_mapped_file (symsfilename, mtime, mapped) | |
609 | char *symsfilename; | |
610 | long mtime; | |
611 | int mapped; | |
612 | { | |
613 | int fd = -1; | |
614 | struct stat sbuf; | |
615 | ||
616 | if (stat (symsfilename, &sbuf) == 0) | |
617 | { | |
618 | if (sbuf.st_mtime < mtime) | |
619 | { | |
620 | if (!mapped) | |
621 | { | |
a679650f FF |
622 | warning ("mapped symbol file `%s' is out of date, ignored it", |
623 | symsfilename); | |
1867b3be FF |
624 | } |
625 | } | |
626 | else if ((fd = open (symsfilename, O_RDWR)) < 0) | |
627 | { | |
628 | if (error_pre_print) | |
629 | { | |
630 | printf (error_pre_print); | |
631 | } | |
632 | print_sys_errmsg (symsfilename, errno); | |
633 | } | |
634 | } | |
635 | return (fd); | |
636 | } | |
637 | ||
b0246b3b | 638 | /* Look for a mapped symbol file that corresponds to FILENAME and is more |
318bf84f | 639 | recent than MTIME. If MAPPED is nonzero, the user has asked that gdb |
b0246b3b FF |
640 | use a mapped symbol file for this file, so create a new one if one does |
641 | not currently exist. | |
318bf84f FF |
642 | |
643 | If found, then return an open file descriptor for the file, otherwise | |
644 | return -1. | |
645 | ||
646 | This routine is responsible for implementing the policy that generates | |
647 | the name of the mapped symbol file from the name of a file containing | |
1867b3be FF |
648 | symbols that gdb would like to read. Currently this policy is to append |
649 | ".syms" to the name of the file. | |
650 | ||
651 | This routine is also responsible for implementing the policy that | |
652 | determines where the mapped symbol file is found (the search path). | |
653 | This policy is that when reading an existing mapped file, a file of | |
654 | the correct name in the current directory takes precedence over a | |
655 | file of the correct name in the same directory as the symbol file. | |
656 | When creating a new mapped file, it is always created in the current | |
657 | directory. This helps to minimize the chances of a user unknowingly | |
658 | creating big mapped files in places like /bin and /usr/local/bin, and | |
659 | allows a local copy to override a manually installed global copy (in | |
660 | /bin for example). */ | |
318bf84f FF |
661 | |
662 | static int | |
b0246b3b FF |
663 | open_mapped_file (filename, mtime, mapped) |
664 | char *filename; | |
318bf84f FF |
665 | long mtime; |
666 | int mapped; | |
667 | { | |
668 | int fd; | |
1867b3be | 669 | char *symsfilename; |
318bf84f | 670 | |
1867b3be FF |
671 | /* First try to open an existing file in the current directory, and |
672 | then try the directory where the symbol file is located. */ | |
318bf84f | 673 | |
1867b3be FF |
674 | symsfilename = concat ("./", basename (filename), ".syms", (char *) NULL); |
675 | if ((fd = open_existing_mapped_file (symsfilename, mtime, mapped)) < 0) | |
318bf84f | 676 | { |
1867b3be FF |
677 | free (symsfilename); |
678 | symsfilename = concat (filename, ".syms", (char *) NULL); | |
679 | fd = open_existing_mapped_file (symsfilename, mtime, mapped); | |
318bf84f FF |
680 | } |
681 | ||
1867b3be FF |
682 | /* If we don't have an open file by now, then either the file does not |
683 | already exist, or the base file has changed since it was created. In | |
684 | either case, if the user has specified use of a mapped file, then | |
685 | create a new mapped file, truncating any existing one. If we can't | |
686 | create one, print a system error message saying why we can't. | |
318bf84f FF |
687 | |
688 | By default the file is rw for everyone, with the user's umask taking | |
689 | care of turning off the permissions the user wants off. */ | |
690 | ||
1867b3be | 691 | if ((fd < 0) && mapped) |
318bf84f | 692 | { |
1867b3be FF |
693 | free (symsfilename); |
694 | symsfilename = concat ("./", basename (filename), ".syms", | |
695 | (char *) NULL); | |
696 | if ((fd = open (symsfilename, O_RDWR | O_CREAT | O_TRUNC, 0666)) < 0) | |
697 | { | |
698 | if (error_pre_print) | |
699 | { | |
700 | printf (error_pre_print); | |
701 | } | |
702 | print_sys_errmsg (symsfilename, errno); | |
703 | } | |
318bf84f FF |
704 | } |
705 | ||
1867b3be | 706 | free (symsfilename); |
318bf84f FF |
707 | return (fd); |
708 | } | |
709 | ||
710 | /* Return the base address at which we would like the next objfile's | |
711 | mapped data to start. | |
712 | ||
713 | For now, we use the kludge that the configuration specifies a base | |
714 | address to which it is safe to map the first mmalloc heap, and an | |
715 | increment to add to this address for each successive heap. There are | |
716 | a lot of issues to deal with here to make this work reasonably, including: | |
717 | ||
718 | Avoid memory collisions with existing mapped address spaces | |
719 | ||
720 | Reclaim address spaces when their mmalloc heaps are unmapped | |
721 | ||
722 | When mmalloc heaps are shared between processes they have to be | |
723 | mapped at the same addresses in each | |
724 | ||
725 | Once created, a mmalloc heap that is to be mapped back in must be | |
726 | mapped at the original address. I.E. each objfile will expect to | |
727 | be remapped at it's original address. This becomes a problem if | |
728 | the desired address is already in use. | |
729 | ||
730 | etc, etc, etc. | |
731 | ||
732 | */ | |
733 | ||
734 | ||
735 | static CORE_ADDR | |
736 | map_to_address () | |
737 | { | |
738 | ||
739 | #if defined(MMAP_BASE_ADDRESS) && defined (MMAP_INCREMENT) | |
740 | ||
741 | static CORE_ADDR next = MMAP_BASE_ADDRESS; | |
742 | CORE_ADDR mapto = next; | |
743 | ||
744 | next += MMAP_INCREMENT; | |
745 | return (mapto); | |
746 | ||
747 | #else | |
748 | ||
749 | return (0); | |
750 | ||
751 | #endif | |
752 | ||
753 | } | |
1867b3be FF |
754 | |
755 | #endif /* !defined(NO_MMALLOC) && defined(HAVE_MMAP) */ | |
73d0fc78 RP |
756 | |
757 | /* Returns a section whose range includes PC or NULL if none found. */ | |
758 | ||
4365c36c | 759 | struct obj_section * |
73d0fc78 RP |
760 | find_pc_section(pc) |
761 | CORE_ADDR pc; | |
762 | { | |
763 | struct obj_section *s; | |
764 | struct objfile *objfile; | |
765 | ||
766 | ALL_OBJFILES (objfile) | |
767 | for (s = objfile->sections; s < objfile->sections_end; ++s) | |
768 | if (s->addr <= pc | |
769 | && pc < s->endaddr) | |
4365c36c | 770 | return(s); |
73d0fc78 RP |
771 | |
772 | return(NULL); | |
773 | } |