Commit | Line | Data |
---|---|---|
c906108c | 1 | /* GDB routines for manipulating objfiles. |
af5f3db6 AC |
2 | |
3 | Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, | |
2de7ced7 | 4 | 2001, 2002, 2003 Free Software Foundation, Inc. |
af5f3db6 | 5 | |
c906108c SS |
6 | Contributed by Cygnus Support, using pieces from other GDB modules. |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b JM |
20 | You should have received a copy of the GNU General Public License |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
24 | |
25 | /* This file contains support routines for creating, manipulating, and | |
26 | destroying objfile structures. */ | |
27 | ||
28 | #include "defs.h" | |
29 | #include "bfd.h" /* Binary File Description */ | |
30 | #include "symtab.h" | |
31 | #include "symfile.h" | |
32 | #include "objfiles.h" | |
33 | #include "gdb-stabs.h" | |
34 | #include "target.h" | |
af5f3db6 | 35 | #include "bcache.h" |
c906108c SS |
36 | |
37 | #include <sys/types.h> | |
38 | #include "gdb_stat.h" | |
39 | #include <fcntl.h> | |
04ea0df1 | 40 | #include "gdb_obstack.h" |
c906108c | 41 | #include "gdb_string.h" |
2de7ced7 | 42 | #include "hashtab.h" |
c906108c | 43 | |
7a292a7a | 44 | #include "breakpoint.h" |
fe898f56 | 45 | #include "block.h" |
de4f826b | 46 | #include "dictionary.h" |
7a292a7a | 47 | |
c906108c SS |
48 | /* Prototypes for local functions */ |
49 | ||
50 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
51 | ||
ed1801df AC |
52 | #include "mmalloc.h" |
53 | ||
a14ed312 | 54 | static int open_existing_mapped_file (char *, long, int); |
c906108c | 55 | |
a14ed312 | 56 | static int open_mapped_file (char *filename, long mtime, int flags); |
c906108c | 57 | |
4efb68b1 | 58 | static void *map_to_file (int); |
c906108c | 59 | |
c5aa993b | 60 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c | 61 | |
4efb68b1 | 62 | static void add_to_objfile_sections (bfd *, sec_ptr, void *); |
c906108c SS |
63 | |
64 | /* Externally visible variables that are owned by this module. | |
65 | See declarations in objfile.h for more info. */ | |
66 | ||
c5aa993b | 67 | struct objfile *object_files; /* Linked list of all objfiles */ |
c906108c SS |
68 | struct objfile *current_objfile; /* For symbol file being read in */ |
69 | struct objfile *symfile_objfile; /* Main symbol table loaded from */ | |
70 | struct objfile *rt_common_objfile; /* For runtime common symbols */ | |
71 | ||
c5aa993b | 72 | int mapped_symbol_files; /* Try to use mapped symbol files */ |
c906108c SS |
73 | |
74 | /* Locate all mappable sections of a BFD file. | |
75 | objfile_p_char is a char * to get it through | |
76 | bfd_map_over_sections; we cast it back to its proper type. */ | |
77 | ||
78 | #ifndef TARGET_KEEP_SECTION | |
79 | #define TARGET_KEEP_SECTION(ASECT) 0 | |
80 | #endif | |
81 | ||
96baa820 JM |
82 | /* Called via bfd_map_over_sections to build up the section table that |
83 | the objfile references. The objfile contains pointers to the start | |
84 | of the table (objfile->sections) and to the first location after | |
85 | the end of the table (objfile->sections_end). */ | |
86 | ||
c906108c | 87 | static void |
4efb68b1 | 88 | add_to_objfile_sections (bfd *abfd, sec_ptr asect, void *objfile_p_char) |
c906108c SS |
89 | { |
90 | struct objfile *objfile = (struct objfile *) objfile_p_char; | |
91 | struct obj_section section; | |
92 | flagword aflag; | |
93 | ||
94 | aflag = bfd_get_section_flags (abfd, asect); | |
95 | ||
c5aa993b | 96 | if (!(aflag & SEC_ALLOC) && !(TARGET_KEEP_SECTION (asect))) |
c906108c SS |
97 | return; |
98 | ||
99 | if (0 == bfd_section_size (abfd, asect)) | |
100 | return; | |
101 | section.offset = 0; | |
102 | section.objfile = objfile; | |
103 | section.the_bfd_section = asect; | |
104 | section.ovly_mapped = 0; | |
105 | section.addr = bfd_section_vma (abfd, asect); | |
106 | section.endaddr = section.addr + bfd_section_size (abfd, asect); | |
c5aa993b | 107 | obstack_grow (&objfile->psymbol_obstack, (char *) §ion, sizeof (section)); |
c906108c SS |
108 | objfile->sections_end = (struct obj_section *) (((unsigned long) objfile->sections_end) + 1); |
109 | } | |
110 | ||
111 | /* Builds a section table for OBJFILE. | |
112 | Returns 0 if OK, 1 on error (in which case bfd_error contains the | |
96baa820 JM |
113 | error). |
114 | ||
115 | Note that while we are building the table, which goes into the | |
116 | psymbol obstack, we hijack the sections_end pointer to instead hold | |
117 | a count of the number of sections. When bfd_map_over_sections | |
118 | returns, this count is used to compute the pointer to the end of | |
119 | the sections table, which then overwrites the count. | |
120 | ||
121 | Also note that the OFFSET and OVLY_MAPPED in each table entry | |
122 | are initialized to zero. | |
123 | ||
124 | Also note that if anything else writes to the psymbol obstack while | |
125 | we are building the table, we're pretty much hosed. */ | |
c906108c SS |
126 | |
127 | int | |
fba45db2 | 128 | build_objfile_section_table (struct objfile *objfile) |
c906108c SS |
129 | { |
130 | /* objfile->sections can be already set when reading a mapped symbol | |
131 | file. I believe that we do need to rebuild the section table in | |
132 | this case (we rebuild other things derived from the bfd), but we | |
133 | can't free the old one (it's in the psymbol_obstack). So we just | |
134 | waste some memory. */ | |
135 | ||
136 | objfile->sections_end = 0; | |
c5aa993b | 137 | bfd_map_over_sections (objfile->obfd, add_to_objfile_sections, (char *) objfile); |
c906108c SS |
138 | objfile->sections = (struct obj_section *) |
139 | obstack_finish (&objfile->psymbol_obstack); | |
140 | objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end; | |
c5aa993b | 141 | return (0); |
c906108c SS |
142 | } |
143 | ||
2df3850c JM |
144 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits |
145 | allocate a new objfile struct, fill it in as best we can, link it | |
146 | into the list of all known objfiles, and return a pointer to the | |
147 | new objfile struct. | |
c906108c | 148 | |
2df3850c JM |
149 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
150 | requests for specific operations, like trying to open a mapped | |
151 | version of the objfile (OBJF_MAPPED). Other bits like | |
152 | OBJF_SHARED are simply copied through to the new objfile flags | |
153 | member. */ | |
c906108c | 154 | |
eb9a305d DC |
155 | /* NOTE: carlton/2003-02-04: This function is called with args NULL, 0 |
156 | by jv-lang.c, to create an artificial objfile used to hold | |
157 | information about dynamically-loaded Java classes. Unfortunately, | |
158 | that branch of this function doesn't get tested very frequently, so | |
159 | it's prone to breakage. (E.g. at one time the name was set to NULL | |
160 | in that situation, which broke a loop over all names in the dynamic | |
161 | library loader.) If you change this function, please try to leave | |
162 | things in a consistent state even if abfd is NULL. */ | |
163 | ||
c906108c | 164 | struct objfile * |
fba45db2 | 165 | allocate_objfile (bfd *abfd, int flags) |
c906108c SS |
166 | { |
167 | struct objfile *objfile = NULL; | |
168 | struct objfile *last_one = NULL; | |
169 | ||
2df3850c JM |
170 | if (mapped_symbol_files) |
171 | flags |= OBJF_MAPPED; | |
c906108c SS |
172 | |
173 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
174 | if (abfd != NULL) | |
c5aa993b | 175 | { |
c906108c | 176 | |
c5aa993b JM |
177 | /* If we can support mapped symbol files, try to open/reopen the |
178 | mapped file that corresponds to the file from which we wish to | |
179 | read symbols. If the objfile is to be mapped, we must malloc | |
180 | the structure itself using the mmap version, and arrange that | |
181 | all memory allocation for the objfile uses the mmap routines. | |
182 | If we are reusing an existing mapped file, from which we get | |
183 | our objfile pointer, we have to make sure that we update the | |
184 | pointers to the alloc/free functions in the obstack, in case | |
185 | these functions have moved within the current gdb. */ | |
186 | ||
187 | int fd; | |
188 | ||
189 | fd = open_mapped_file (bfd_get_filename (abfd), bfd_get_mtime (abfd), | |
2df3850c | 190 | flags); |
c5aa993b JM |
191 | if (fd >= 0) |
192 | { | |
4efb68b1 | 193 | void *md; |
c906108c | 194 | |
c5aa993b JM |
195 | if ((md = map_to_file (fd)) == NULL) |
196 | { | |
197 | close (fd); | |
198 | } | |
199 | else if ((objfile = (struct objfile *) mmalloc_getkey (md, 0)) != NULL) | |
200 | { | |
201 | /* Update memory corruption handler function addresses. */ | |
202 | init_malloc (md); | |
203 | objfile->md = md; | |
204 | objfile->mmfd = fd; | |
205 | /* Update pointers to functions to *our* copies */ | |
2de7ced7 DJ |
206 | if (objfile->demangled_names_hash) |
207 | htab_set_functions_ex | |
208 | (objfile->demangled_names_hash, htab_hash_string, | |
209 | (int (*) (const void *, const void *)) streq, NULL, | |
210 | objfile->md, xmcalloc, xmfree); | |
c5aa993b | 211 | obstack_chunkfun (&objfile->psymbol_cache.cache, xmmalloc); |
aac7f4ea | 212 | obstack_freefun (&objfile->psymbol_cache.cache, xmfree); |
99d9066e JB |
213 | obstack_chunkfun (&objfile->macro_cache.cache, xmmalloc); |
214 | obstack_freefun (&objfile->macro_cache.cache, xmfree); | |
c5aa993b | 215 | obstack_chunkfun (&objfile->psymbol_obstack, xmmalloc); |
aac7f4ea | 216 | obstack_freefun (&objfile->psymbol_obstack, xmfree); |
c5aa993b | 217 | obstack_chunkfun (&objfile->symbol_obstack, xmmalloc); |
aac7f4ea | 218 | obstack_freefun (&objfile->symbol_obstack, xmfree); |
c5aa993b | 219 | obstack_chunkfun (&objfile->type_obstack, xmmalloc); |
aac7f4ea | 220 | obstack_freefun (&objfile->type_obstack, xmfree); |
c5aa993b JM |
221 | /* If already in objfile list, unlink it. */ |
222 | unlink_objfile (objfile); | |
223 | /* Forget things specific to a particular gdb, may have changed. */ | |
224 | objfile->sf = NULL; | |
225 | } | |
226 | else | |
227 | { | |
c906108c | 228 | |
c5aa993b JM |
229 | /* Set up to detect internal memory corruption. MUST be |
230 | done before the first malloc. See comments in | |
231 | init_malloc() and mmcheck(). */ | |
232 | ||
233 | init_malloc (md); | |
234 | ||
235 | objfile = (struct objfile *) | |
236 | xmmalloc (md, sizeof (struct objfile)); | |
237 | memset (objfile, 0, sizeof (struct objfile)); | |
238 | objfile->md = md; | |
239 | objfile->mmfd = fd; | |
240 | objfile->flags |= OBJF_MAPPED; | |
241 | mmalloc_setkey (objfile->md, 0, objfile); | |
242 | obstack_specify_allocation_with_arg (&objfile->psymbol_cache.cache, | |
aac7f4ea | 243 | 0, 0, xmmalloc, xmfree, |
c5aa993b | 244 | objfile->md); |
99d9066e JB |
245 | obstack_specify_allocation_with_arg (&objfile->macro_cache.cache, |
246 | 0, 0, xmmalloc, xmfree, | |
247 | objfile->md); | |
c5aa993b | 248 | obstack_specify_allocation_with_arg (&objfile->psymbol_obstack, |
aac7f4ea | 249 | 0, 0, xmmalloc, xmfree, |
c5aa993b JM |
250 | objfile->md); |
251 | obstack_specify_allocation_with_arg (&objfile->symbol_obstack, | |
aac7f4ea | 252 | 0, 0, xmmalloc, xmfree, |
c5aa993b JM |
253 | objfile->md); |
254 | obstack_specify_allocation_with_arg (&objfile->type_obstack, | |
aac7f4ea | 255 | 0, 0, xmmalloc, xmfree, |
c5aa993b JM |
256 | objfile->md); |
257 | } | |
258 | } | |
c906108c | 259 | |
2df3850c | 260 | if ((flags & OBJF_MAPPED) && (objfile == NULL)) |
c5aa993b JM |
261 | { |
262 | warning ("symbol table for '%s' will not be mapped", | |
263 | bfd_get_filename (abfd)); | |
2df3850c | 264 | flags &= ~OBJF_MAPPED; |
c5aa993b JM |
265 | } |
266 | } | |
267 | #else /* !defined(USE_MMALLOC) || !defined(HAVE_MMAP) */ | |
c906108c | 268 | |
2df3850c | 269 | if (flags & OBJF_MAPPED) |
c906108c SS |
270 | { |
271 | warning ("mapped symbol tables are not supported on this machine; missing or broken mmap()."); | |
272 | ||
273 | /* Turn off the global flag so we don't try to do mapped symbol tables | |
c5aa993b JM |
274 | any more, which shuts up gdb unless the user specifically gives the |
275 | "mapped" keyword again. */ | |
c906108c SS |
276 | |
277 | mapped_symbol_files = 0; | |
2df3850c | 278 | flags &= ~OBJF_MAPPED; |
c906108c SS |
279 | } |
280 | ||
c5aa993b | 281 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c SS |
282 | |
283 | /* If we don't support mapped symbol files, didn't ask for the file to be | |
284 | mapped, or failed to open the mapped file for some reason, then revert | |
285 | back to an unmapped objfile. */ | |
286 | ||
287 | if (objfile == NULL) | |
288 | { | |
289 | objfile = (struct objfile *) xmalloc (sizeof (struct objfile)); | |
290 | memset (objfile, 0, sizeof (struct objfile)); | |
c5aa993b | 291 | objfile->md = NULL; |
af5f3db6 AC |
292 | objfile->psymbol_cache = bcache_xmalloc (); |
293 | objfile->macro_cache = bcache_xmalloc (); | |
c5aa993b | 294 | obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, xmalloc, |
b8c9b27d | 295 | xfree); |
c5aa993b | 296 | obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, xmalloc, |
b8c9b27d | 297 | xfree); |
c5aa993b | 298 | obstack_specify_allocation (&objfile->type_obstack, 0, 0, xmalloc, |
b8c9b27d | 299 | xfree); |
2df3850c | 300 | flags &= ~OBJF_MAPPED; |
15831452 JB |
301 | |
302 | terminate_minimal_symbol_table (objfile); | |
c906108c SS |
303 | } |
304 | ||
305 | /* Update the per-objfile information that comes from the bfd, ensuring | |
306 | that any data that is reference is saved in the per-objfile data | |
307 | region. */ | |
308 | ||
c5aa993b JM |
309 | objfile->obfd = abfd; |
310 | if (objfile->name != NULL) | |
c906108c | 311 | { |
aac7f4ea | 312 | xmfree (objfile->md, objfile->name); |
c906108c SS |
313 | } |
314 | if (abfd != NULL) | |
315 | { | |
c5aa993b JM |
316 | objfile->name = mstrsave (objfile->md, bfd_get_filename (abfd)); |
317 | objfile->mtime = bfd_get_mtime (abfd); | |
c906108c SS |
318 | |
319 | /* Build section table. */ | |
320 | ||
321 | if (build_objfile_section_table (objfile)) | |
322 | { | |
c5aa993b JM |
323 | error ("Can't find the file sections in `%s': %s", |
324 | objfile->name, bfd_errmsg (bfd_get_error ())); | |
c906108c SS |
325 | } |
326 | } | |
eb9a305d DC |
327 | else |
328 | { | |
a9c0dc7f | 329 | objfile->name = mstrsave (objfile->md, "<<anonymous objfile>>"); |
eb9a305d | 330 | } |
c906108c | 331 | |
b8fbeb18 EZ |
332 | /* Initialize the section indexes for this objfile, so that we can |
333 | later detect if they are used w/o being properly assigned to. */ | |
334 | ||
335 | objfile->sect_index_text = -1; | |
336 | objfile->sect_index_data = -1; | |
337 | objfile->sect_index_bss = -1; | |
338 | objfile->sect_index_rodata = -1; | |
339 | ||
c906108c SS |
340 | /* Add this file onto the tail of the linked list of other such files. */ |
341 | ||
c5aa993b | 342 | objfile->next = NULL; |
c906108c SS |
343 | if (object_files == NULL) |
344 | object_files = objfile; | |
345 | else | |
346 | { | |
347 | for (last_one = object_files; | |
c5aa993b JM |
348 | last_one->next; |
349 | last_one = last_one->next); | |
350 | last_one->next = objfile; | |
c906108c SS |
351 | } |
352 | ||
2df3850c JM |
353 | /* Save passed in flag bits. */ |
354 | objfile->flags |= flags; | |
c906108c SS |
355 | |
356 | return (objfile); | |
357 | } | |
358 | ||
15831452 JB |
359 | |
360 | /* Create the terminating entry of OBJFILE's minimal symbol table. | |
361 | If OBJFILE->msymbols is zero, allocate a single entry from | |
362 | OBJFILE->symbol_obstack; otherwise, just initialize | |
363 | OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */ | |
364 | void | |
365 | terminate_minimal_symbol_table (struct objfile *objfile) | |
366 | { | |
367 | if (! objfile->msymbols) | |
368 | objfile->msymbols = ((struct minimal_symbol *) | |
369 | obstack_alloc (&objfile->symbol_obstack, | |
370 | sizeof (objfile->msymbols[0]))); | |
371 | ||
372 | { | |
373 | struct minimal_symbol *m | |
374 | = &objfile->msymbols[objfile->minimal_symbol_count]; | |
375 | ||
376 | memset (m, 0, sizeof (*m)); | |
22abf04a | 377 | DEPRECATED_SYMBOL_NAME (m) = NULL; |
15831452 JB |
378 | SYMBOL_VALUE_ADDRESS (m) = 0; |
379 | MSYMBOL_INFO (m) = NULL; | |
380 | MSYMBOL_TYPE (m) = mst_unknown; | |
381 | SYMBOL_INIT_LANGUAGE_SPECIFIC (m, language_unknown); | |
382 | } | |
383 | } | |
384 | ||
385 | ||
5b5d99cf JB |
386 | /* Put one object file before a specified on in the global list. |
387 | This can be used to make sure an object file is destroyed before | |
388 | another when using ALL_OBJFILES_SAFE to free all objfiles. */ | |
389 | void | |
390 | put_objfile_before (struct objfile *objfile, struct objfile *before_this) | |
391 | { | |
392 | struct objfile **objp; | |
393 | ||
394 | unlink_objfile (objfile); | |
395 | ||
396 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
397 | { | |
398 | if (*objp == before_this) | |
399 | { | |
400 | objfile->next = *objp; | |
401 | *objp = objfile; | |
402 | return; | |
403 | } | |
404 | } | |
405 | ||
406 | internal_error (__FILE__, __LINE__, | |
407 | "put_objfile_before: before objfile not in list"); | |
408 | } | |
409 | ||
c906108c SS |
410 | /* Put OBJFILE at the front of the list. */ |
411 | ||
412 | void | |
fba45db2 | 413 | objfile_to_front (struct objfile *objfile) |
c906108c SS |
414 | { |
415 | struct objfile **objp; | |
416 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
417 | { | |
418 | if (*objp == objfile) | |
419 | { | |
420 | /* Unhook it from where it is. */ | |
421 | *objp = objfile->next; | |
422 | /* Put it in the front. */ | |
423 | objfile->next = object_files; | |
424 | object_files = objfile; | |
425 | break; | |
426 | } | |
427 | } | |
428 | } | |
429 | ||
430 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the | |
431 | list. | |
432 | ||
433 | It is not a bug, or error, to call this function if OBJFILE is not known | |
434 | to be in the current list. This is done in the case of mapped objfiles, | |
435 | for example, just to ensure that the mapped objfile doesn't appear twice | |
436 | in the list. Since the list is threaded, linking in a mapped objfile | |
437 | twice would create a circular list. | |
438 | ||
439 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
440 | unlinking it, just to ensure that we have completely severed any linkages | |
441 | between the OBJFILE and the list. */ | |
442 | ||
443 | void | |
fba45db2 | 444 | unlink_objfile (struct objfile *objfile) |
c906108c | 445 | { |
c5aa993b | 446 | struct objfile **objpp; |
c906108c | 447 | |
c5aa993b | 448 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
c906108c | 449 | { |
c5aa993b | 450 | if (*objpp == objfile) |
c906108c | 451 | { |
c5aa993b JM |
452 | *objpp = (*objpp)->next; |
453 | objfile->next = NULL; | |
07cd4b97 | 454 | return; |
c906108c SS |
455 | } |
456 | } | |
07cd4b97 | 457 | |
8e65ff28 AC |
458 | internal_error (__FILE__, __LINE__, |
459 | "unlink_objfile: objfile already unlinked"); | |
c906108c SS |
460 | } |
461 | ||
462 | ||
463 | /* Destroy an objfile and all the symtabs and psymtabs under it. Note | |
464 | that as much as possible is allocated on the symbol_obstack and | |
465 | psymbol_obstack, so that the memory can be efficiently freed. | |
466 | ||
467 | Things which we do NOT free because they are not in malloc'd memory | |
468 | or not in memory specific to the objfile include: | |
469 | ||
c5aa993b | 470 | objfile -> sf |
c906108c SS |
471 | |
472 | FIXME: If the objfile is using reusable symbol information (via mmalloc), | |
473 | then we need to take into account the fact that more than one process | |
474 | may be using the symbol information at the same time (when mmalloc is | |
475 | extended to support cooperative locking). When more than one process | |
476 | is using the mapped symbol info, we need to be more careful about when | |
477 | we free objects in the reusable area. */ | |
478 | ||
479 | void | |
fba45db2 | 480 | free_objfile (struct objfile *objfile) |
c906108c | 481 | { |
5b5d99cf JB |
482 | if (objfile->separate_debug_objfile) |
483 | { | |
484 | free_objfile (objfile->separate_debug_objfile); | |
485 | } | |
486 | ||
487 | if (objfile->separate_debug_objfile_backlink) | |
488 | { | |
489 | /* We freed the separate debug file, make sure the base objfile | |
490 | doesn't reference it. */ | |
491 | objfile->separate_debug_objfile_backlink->separate_debug_objfile = NULL; | |
492 | } | |
493 | ||
c906108c SS |
494 | /* First do any symbol file specific actions required when we are |
495 | finished with a particular symbol file. Note that if the objfile | |
496 | is using reusable symbol information (via mmalloc) then each of | |
497 | these routines is responsible for doing the correct thing, either | |
498 | freeing things which are valid only during this particular gdb | |
499 | execution, or leaving them to be reused during the next one. */ | |
500 | ||
c5aa993b | 501 | if (objfile->sf != NULL) |
c906108c | 502 | { |
c5aa993b | 503 | (*objfile->sf->sym_finish) (objfile); |
c906108c SS |
504 | } |
505 | ||
506 | /* We always close the bfd. */ | |
507 | ||
c5aa993b | 508 | if (objfile->obfd != NULL) |
c906108c SS |
509 | { |
510 | char *name = bfd_get_filename (objfile->obfd); | |
c5aa993b | 511 | if (!bfd_close (objfile->obfd)) |
c906108c SS |
512 | warning ("cannot close \"%s\": %s", |
513 | name, bfd_errmsg (bfd_get_error ())); | |
b8c9b27d | 514 | xfree (name); |
c906108c SS |
515 | } |
516 | ||
517 | /* Remove it from the chain of all objfiles. */ | |
518 | ||
519 | unlink_objfile (objfile); | |
520 | ||
521 | /* If we are going to free the runtime common objfile, mark it | |
522 | as unallocated. */ | |
523 | ||
524 | if (objfile == rt_common_objfile) | |
525 | rt_common_objfile = NULL; | |
526 | ||
527 | /* Before the symbol table code was redone to make it easier to | |
528 | selectively load and remove information particular to a specific | |
529 | linkage unit, gdb used to do these things whenever the monolithic | |
530 | symbol table was blown away. How much still needs to be done | |
531 | is unknown, but we play it safe for now and keep each action until | |
532 | it is shown to be no longer needed. */ | |
c5aa993b | 533 | |
c906108c SS |
534 | /* I *think* all our callers call clear_symtab_users. If so, no need |
535 | to call this here. */ | |
536 | clear_pc_function_cache (); | |
537 | ||
538 | /* The last thing we do is free the objfile struct itself for the | |
aac7f4ea AC |
539 | non-reusable case, or detach from the mapped file for the |
540 | reusable case. Note that the mmalloc_detach or the xmfree() is | |
541 | the last thing we can do with this objfile. */ | |
c906108c SS |
542 | |
543 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
544 | ||
c5aa993b | 545 | if (objfile->flags & OBJF_MAPPED) |
c906108c SS |
546 | { |
547 | /* Remember the fd so we can close it. We can't close it before | |
c5aa993b | 548 | doing the detach, and after the detach the objfile is gone. */ |
c906108c SS |
549 | int mmfd; |
550 | ||
c5aa993b JM |
551 | mmfd = objfile->mmfd; |
552 | mmalloc_detach (objfile->md); | |
c906108c SS |
553 | objfile = NULL; |
554 | close (mmfd); | |
555 | } | |
556 | ||
c5aa993b | 557 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c SS |
558 | |
559 | /* If we still have an objfile, then either we don't support reusable | |
560 | objfiles or this one was not reusable. So free it normally. */ | |
561 | ||
562 | if (objfile != NULL) | |
563 | { | |
c5aa993b | 564 | if (objfile->name != NULL) |
c906108c | 565 | { |
aac7f4ea | 566 | xmfree (objfile->md, objfile->name); |
c906108c SS |
567 | } |
568 | if (objfile->global_psymbols.list) | |
aac7f4ea | 569 | xmfree (objfile->md, objfile->global_psymbols.list); |
c906108c | 570 | if (objfile->static_psymbols.list) |
aac7f4ea | 571 | xmfree (objfile->md, objfile->static_psymbols.list); |
c906108c | 572 | /* Free the obstacks for non-reusable objfiles */ |
af5f3db6 AC |
573 | bcache_xfree (objfile->psymbol_cache); |
574 | bcache_xfree (objfile->macro_cache); | |
2de7ced7 DJ |
575 | if (objfile->demangled_names_hash) |
576 | htab_delete (objfile->demangled_names_hash); | |
c5aa993b JM |
577 | obstack_free (&objfile->psymbol_obstack, 0); |
578 | obstack_free (&objfile->symbol_obstack, 0); | |
579 | obstack_free (&objfile->type_obstack, 0); | |
aac7f4ea | 580 | xmfree (objfile->md, objfile); |
c906108c SS |
581 | objfile = NULL; |
582 | } | |
583 | } | |
584 | ||
74b7792f AC |
585 | static void |
586 | do_free_objfile_cleanup (void *obj) | |
587 | { | |
588 | free_objfile (obj); | |
589 | } | |
590 | ||
591 | struct cleanup * | |
592 | make_cleanup_free_objfile (struct objfile *obj) | |
593 | { | |
594 | return make_cleanup (do_free_objfile_cleanup, obj); | |
595 | } | |
c906108c SS |
596 | |
597 | /* Free all the object files at once and clean up their users. */ | |
598 | ||
599 | void | |
fba45db2 | 600 | free_all_objfiles (void) |
c906108c SS |
601 | { |
602 | struct objfile *objfile, *temp; | |
603 | ||
604 | ALL_OBJFILES_SAFE (objfile, temp) | |
c5aa993b JM |
605 | { |
606 | free_objfile (objfile); | |
607 | } | |
c906108c SS |
608 | clear_symtab_users (); |
609 | } | |
610 | \f | |
611 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
612 | entries in new_offsets. */ | |
613 | void | |
fba45db2 | 614 | objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets) |
c906108c | 615 | { |
d4f3574e | 616 | struct section_offsets *delta = |
a39a16c4 MM |
617 | ((struct section_offsets *) |
618 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
c906108c SS |
619 | |
620 | { | |
621 | int i; | |
622 | int something_changed = 0; | |
623 | for (i = 0; i < objfile->num_sections; ++i) | |
624 | { | |
a4c8257b | 625 | delta->offsets[i] = |
c906108c SS |
626 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); |
627 | if (ANOFFSET (delta, i) != 0) | |
628 | something_changed = 1; | |
629 | } | |
630 | if (!something_changed) | |
631 | return; | |
632 | } | |
633 | ||
634 | /* OK, get all the symtabs. */ | |
635 | { | |
636 | struct symtab *s; | |
637 | ||
638 | ALL_OBJFILE_SYMTABS (objfile, s) | |
c5aa993b JM |
639 | { |
640 | struct linetable *l; | |
641 | struct blockvector *bv; | |
642 | int i; | |
643 | ||
644 | /* First the line table. */ | |
645 | l = LINETABLE (s); | |
646 | if (l) | |
647 | { | |
648 | for (i = 0; i < l->nitems; ++i) | |
649 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
650 | } | |
c906108c | 651 | |
c5aa993b JM |
652 | /* Don't relocate a shared blockvector more than once. */ |
653 | if (!s->primary) | |
654 | continue; | |
c906108c | 655 | |
c5aa993b JM |
656 | bv = BLOCKVECTOR (s); |
657 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) | |
658 | { | |
659 | struct block *b; | |
e88c90f2 | 660 | struct symbol *sym; |
de4f826b | 661 | struct dict_iterator iter; |
c5aa993b JM |
662 | |
663 | b = BLOCKVECTOR_BLOCK (bv, i); | |
664 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
665 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); | |
666 | ||
de4f826b | 667 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
c5aa993b | 668 | { |
7a78d0ee KB |
669 | fixup_symbol_section (sym, objfile); |
670 | ||
c5aa993b | 671 | /* The RS6000 code from which this was taken skipped |
176620f1 | 672 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. |
c5aa993b JM |
673 | But I'm leaving out that test, on the theory that |
674 | they can't possibly pass the tests below. */ | |
675 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
676 | || SYMBOL_CLASS (sym) == LOC_STATIC | |
677 | || SYMBOL_CLASS (sym) == LOC_INDIRECT) | |
678 | && SYMBOL_SECTION (sym) >= 0) | |
679 | { | |
680 | SYMBOL_VALUE_ADDRESS (sym) += | |
681 | ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
682 | } | |
c906108c | 683 | #ifdef MIPS_EFI_SYMBOL_NAME |
c5aa993b | 684 | /* Relocate Extra Function Info for ecoff. */ |
c906108c | 685 | |
c5aa993b | 686 | else if (SYMBOL_CLASS (sym) == LOC_CONST |
176620f1 | 687 | && SYMBOL_DOMAIN (sym) == LABEL_DOMAIN |
22abf04a | 688 | && strcmp (DEPRECATED_SYMBOL_NAME (sym), MIPS_EFI_SYMBOL_NAME) == 0) |
c5aa993b | 689 | ecoff_relocate_efi (sym, ANOFFSET (delta, |
c906108c SS |
690 | s->block_line_section)); |
691 | #endif | |
c5aa993b JM |
692 | } |
693 | } | |
694 | } | |
c906108c SS |
695 | } |
696 | ||
697 | { | |
698 | struct partial_symtab *p; | |
699 | ||
700 | ALL_OBJFILE_PSYMTABS (objfile, p) | |
c5aa993b | 701 | { |
b8fbeb18 EZ |
702 | p->textlow += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
703 | p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
c5aa993b | 704 | } |
c906108c SS |
705 | } |
706 | ||
707 | { | |
708 | struct partial_symbol **psym; | |
709 | ||
710 | for (psym = objfile->global_psymbols.list; | |
711 | psym < objfile->global_psymbols.next; | |
712 | psym++) | |
7a78d0ee KB |
713 | { |
714 | fixup_psymbol_section (*psym, objfile); | |
715 | if (SYMBOL_SECTION (*psym) >= 0) | |
716 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, | |
717 | SYMBOL_SECTION (*psym)); | |
718 | } | |
c906108c SS |
719 | for (psym = objfile->static_psymbols.list; |
720 | psym < objfile->static_psymbols.next; | |
721 | psym++) | |
7a78d0ee KB |
722 | { |
723 | fixup_psymbol_section (*psym, objfile); | |
724 | if (SYMBOL_SECTION (*psym) >= 0) | |
725 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, | |
726 | SYMBOL_SECTION (*psym)); | |
727 | } | |
c906108c SS |
728 | } |
729 | ||
730 | { | |
731 | struct minimal_symbol *msym; | |
732 | ALL_OBJFILE_MSYMBOLS (objfile, msym) | |
733 | if (SYMBOL_SECTION (msym) >= 0) | |
c5aa993b | 734 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); |
c906108c SS |
735 | } |
736 | /* Relocating different sections by different amounts may cause the symbols | |
737 | to be out of order. */ | |
738 | msymbols_sort (objfile); | |
739 | ||
740 | { | |
741 | int i; | |
742 | for (i = 0; i < objfile->num_sections; ++i) | |
a4c8257b | 743 | (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); |
c906108c SS |
744 | } |
745 | ||
36b0c0e0 PS |
746 | if (objfile->ei.entry_point != ~(CORE_ADDR) 0) |
747 | { | |
748 | /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT | |
749 | only as a fallback. */ | |
750 | struct obj_section *s; | |
751 | s = find_pc_section (objfile->ei.entry_point); | |
752 | if (s) | |
753 | objfile->ei.entry_point += ANOFFSET (delta, s->the_bfd_section->index); | |
754 | else | |
755 | objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
756 | } | |
757 | ||
c906108c SS |
758 | { |
759 | struct obj_section *s; | |
760 | bfd *abfd; | |
761 | ||
762 | abfd = objfile->obfd; | |
763 | ||
96baa820 | 764 | ALL_OBJFILE_OSECTIONS (objfile, s) |
c906108c | 765 | { |
78f0949b KB |
766 | int idx = s->the_bfd_section->index; |
767 | ||
768 | s->addr += ANOFFSET (delta, idx); | |
769 | s->endaddr += ANOFFSET (delta, idx); | |
c906108c SS |
770 | } |
771 | } | |
772 | ||
c906108c SS |
773 | if (objfile->ei.entry_func_lowpc != INVALID_ENTRY_LOWPC) |
774 | { | |
b8fbeb18 EZ |
775 | objfile->ei.entry_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
776 | objfile->ei.entry_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
777 | } |
778 | ||
779 | if (objfile->ei.entry_file_lowpc != INVALID_ENTRY_LOWPC) | |
780 | { | |
b8fbeb18 EZ |
781 | objfile->ei.entry_file_lowpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
782 | objfile->ei.entry_file_highpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
783 | } |
784 | ||
785 | if (objfile->ei.main_func_lowpc != INVALID_ENTRY_LOWPC) | |
786 | { | |
b8fbeb18 EZ |
787 | objfile->ei.main_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
788 | objfile->ei.main_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
789 | } |
790 | ||
791 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
792 | breakpoint_re_set (); | |
793 | } | |
794 | \f | |
795 | /* Many places in gdb want to test just to see if we have any partial | |
796 | symbols available. This function returns zero if none are currently | |
797 | available, nonzero otherwise. */ | |
798 | ||
799 | int | |
fba45db2 | 800 | have_partial_symbols (void) |
c906108c SS |
801 | { |
802 | struct objfile *ofp; | |
803 | ||
804 | ALL_OBJFILES (ofp) | |
c5aa993b JM |
805 | { |
806 | if (ofp->psymtabs != NULL) | |
807 | { | |
808 | return 1; | |
809 | } | |
810 | } | |
c906108c SS |
811 | return 0; |
812 | } | |
813 | ||
814 | /* Many places in gdb want to test just to see if we have any full | |
815 | symbols available. This function returns zero if none are currently | |
816 | available, nonzero otherwise. */ | |
817 | ||
818 | int | |
fba45db2 | 819 | have_full_symbols (void) |
c906108c SS |
820 | { |
821 | struct objfile *ofp; | |
822 | ||
823 | ALL_OBJFILES (ofp) | |
c5aa993b JM |
824 | { |
825 | if (ofp->symtabs != NULL) | |
826 | { | |
827 | return 1; | |
828 | } | |
829 | } | |
c906108c SS |
830 | return 0; |
831 | } | |
832 | ||
833 | ||
834 | /* This operations deletes all objfile entries that represent solibs that | |
835 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
836 | command. | |
c5aa993b | 837 | */ |
c906108c | 838 | void |
fba45db2 | 839 | objfile_purge_solibs (void) |
c906108c | 840 | { |
c5aa993b JM |
841 | struct objfile *objf; |
842 | struct objfile *temp; | |
c906108c SS |
843 | |
844 | ALL_OBJFILES_SAFE (objf, temp) | |
845 | { | |
846 | /* We assume that the solib package has been purged already, or will | |
847 | be soon. | |
c5aa993b | 848 | */ |
2df3850c | 849 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
c906108c SS |
850 | free_objfile (objf); |
851 | } | |
852 | } | |
853 | ||
854 | ||
855 | /* Many places in gdb want to test just to see if we have any minimal | |
856 | symbols available. This function returns zero if none are currently | |
857 | available, nonzero otherwise. */ | |
858 | ||
859 | int | |
fba45db2 | 860 | have_minimal_symbols (void) |
c906108c SS |
861 | { |
862 | struct objfile *ofp; | |
863 | ||
864 | ALL_OBJFILES (ofp) | |
c5aa993b | 865 | { |
15831452 | 866 | if (ofp->minimal_symbol_count > 0) |
c5aa993b JM |
867 | { |
868 | return 1; | |
869 | } | |
870 | } | |
c906108c SS |
871 | return 0; |
872 | } | |
873 | ||
874 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
875 | ||
876 | /* Given the name of a mapped symbol file in SYMSFILENAME, and the timestamp | |
877 | of the corresponding symbol file in MTIME, try to open an existing file | |
878 | with the name SYMSFILENAME and verify it is more recent than the base | |
879 | file by checking it's timestamp against MTIME. | |
880 | ||
881 | If SYMSFILENAME does not exist (or can't be stat'd), simply returns -1. | |
882 | ||
883 | If SYMSFILENAME does exist, but is out of date, we check to see if the | |
884 | user has specified creation of a mapped file. If so, we don't issue | |
885 | any warning message because we will be creating a new mapped file anyway, | |
886 | overwriting the old one. If not, then we issue a warning message so that | |
887 | the user will know why we aren't using this existing mapped symbol file. | |
888 | In either case, we return -1. | |
889 | ||
890 | If SYMSFILENAME does exist and is not out of date, but can't be opened for | |
891 | some reason, then prints an appropriate system error message and returns -1. | |
892 | ||
893 | Otherwise, returns the open file descriptor. */ | |
894 | ||
895 | static int | |
fba45db2 | 896 | open_existing_mapped_file (char *symsfilename, long mtime, int flags) |
c906108c SS |
897 | { |
898 | int fd = -1; | |
899 | struct stat sbuf; | |
900 | ||
901 | if (stat (symsfilename, &sbuf) == 0) | |
902 | { | |
903 | if (sbuf.st_mtime < mtime) | |
904 | { | |
2df3850c | 905 | if (!(flags & OBJF_MAPPED)) |
c906108c SS |
906 | { |
907 | warning ("mapped symbol file `%s' is out of date, ignored it", | |
908 | symsfilename); | |
909 | } | |
910 | } | |
911 | else if ((fd = open (symsfilename, O_RDWR)) < 0) | |
912 | { | |
913 | if (error_pre_print) | |
914 | { | |
915 | printf_unfiltered (error_pre_print); | |
916 | } | |
917 | print_sys_errmsg (symsfilename, errno); | |
918 | } | |
919 | } | |
920 | return (fd); | |
921 | } | |
922 | ||
923 | /* Look for a mapped symbol file that corresponds to FILENAME and is more | |
924 | recent than MTIME. If MAPPED is nonzero, the user has asked that gdb | |
925 | use a mapped symbol file for this file, so create a new one if one does | |
926 | not currently exist. | |
927 | ||
928 | If found, then return an open file descriptor for the file, otherwise | |
929 | return -1. | |
930 | ||
931 | This routine is responsible for implementing the policy that generates | |
932 | the name of the mapped symbol file from the name of a file containing | |
933 | symbols that gdb would like to read. Currently this policy is to append | |
934 | ".syms" to the name of the file. | |
935 | ||
936 | This routine is also responsible for implementing the policy that | |
937 | determines where the mapped symbol file is found (the search path). | |
938 | This policy is that when reading an existing mapped file, a file of | |
939 | the correct name in the current directory takes precedence over a | |
940 | file of the correct name in the same directory as the symbol file. | |
941 | When creating a new mapped file, it is always created in the current | |
942 | directory. This helps to minimize the chances of a user unknowingly | |
943 | creating big mapped files in places like /bin and /usr/local/bin, and | |
944 | allows a local copy to override a manually installed global copy (in | |
945 | /bin for example). */ | |
946 | ||
947 | static int | |
fba45db2 | 948 | open_mapped_file (char *filename, long mtime, int flags) |
c906108c SS |
949 | { |
950 | int fd; | |
951 | char *symsfilename; | |
952 | ||
953 | /* First try to open an existing file in the current directory, and | |
954 | then try the directory where the symbol file is located. */ | |
955 | ||
bdda63b0 | 956 | symsfilename = concat ("./", lbasename (filename), ".syms", (char *) NULL); |
2df3850c | 957 | if ((fd = open_existing_mapped_file (symsfilename, mtime, flags)) < 0) |
c906108c | 958 | { |
b8c9b27d | 959 | xfree (symsfilename); |
c906108c | 960 | symsfilename = concat (filename, ".syms", (char *) NULL); |
2fc18c15 | 961 | fd = open_existing_mapped_file (symsfilename, mtime, flags); |
c906108c SS |
962 | } |
963 | ||
964 | /* If we don't have an open file by now, then either the file does not | |
965 | already exist, or the base file has changed since it was created. In | |
966 | either case, if the user has specified use of a mapped file, then | |
967 | create a new mapped file, truncating any existing one. If we can't | |
968 | create one, print a system error message saying why we can't. | |
969 | ||
970 | By default the file is rw for everyone, with the user's umask taking | |
971 | care of turning off the permissions the user wants off. */ | |
972 | ||
2fc18c15 | 973 | if ((fd < 0) && (flags & OBJF_MAPPED)) |
c906108c | 974 | { |
b8c9b27d | 975 | xfree (symsfilename); |
bdda63b0 | 976 | symsfilename = concat ("./", lbasename (filename), ".syms", |
c906108c SS |
977 | (char *) NULL); |
978 | if ((fd = open (symsfilename, O_RDWR | O_CREAT | O_TRUNC, 0666)) < 0) | |
979 | { | |
980 | if (error_pre_print) | |
981 | { | |
982 | printf_unfiltered (error_pre_print); | |
983 | } | |
984 | print_sys_errmsg (symsfilename, errno); | |
985 | } | |
986 | } | |
987 | ||
b8c9b27d | 988 | xfree (symsfilename); |
c906108c SS |
989 | return (fd); |
990 | } | |
991 | ||
4efb68b1 | 992 | static void * |
fba45db2 | 993 | map_to_file (int fd) |
c906108c | 994 | { |
4efb68b1 | 995 | void *md; |
c906108c SS |
996 | CORE_ADDR mapto; |
997 | ||
4efb68b1 | 998 | md = mmalloc_attach (fd, 0); |
c906108c SS |
999 | if (md != NULL) |
1000 | { | |
1001 | mapto = (CORE_ADDR) mmalloc_getkey (md, 1); | |
1002 | md = mmalloc_detach (md); | |
1003 | if (md != NULL) | |
1004 | { | |
1005 | /* FIXME: should figure out why detach failed */ | |
1006 | md = NULL; | |
1007 | } | |
1008 | else if (mapto != (CORE_ADDR) NULL) | |
1009 | { | |
1010 | /* This mapping file needs to be remapped at "mapto" */ | |
4efb68b1 | 1011 | md = mmalloc_attach (fd, mapto); |
c906108c SS |
1012 | } |
1013 | else | |
1014 | { | |
1015 | /* This is a freshly created mapping file. */ | |
1016 | mapto = (CORE_ADDR) mmalloc_findbase (20 * 1024 * 1024); | |
1017 | if (mapto != 0) | |
1018 | { | |
1019 | /* To avoid reusing the freshly created mapping file, at the | |
c5aa993b JM |
1020 | address selected by mmap, we must truncate it before trying |
1021 | to do an attach at the address we want. */ | |
c906108c | 1022 | ftruncate (fd, 0); |
4efb68b1 | 1023 | md = mmalloc_attach (fd, mapto); |
c906108c SS |
1024 | if (md != NULL) |
1025 | { | |
4efb68b1 | 1026 | mmalloc_setkey (md, 1, mapto); |
c906108c SS |
1027 | } |
1028 | } | |
1029 | } | |
1030 | } | |
1031 | return (md); | |
1032 | } | |
1033 | ||
c5aa993b | 1034 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c SS |
1035 | |
1036 | /* Returns a section whose range includes PC and SECTION, | |
1037 | or NULL if none found. Note the distinction between the return type, | |
1038 | struct obj_section (which is defined in gdb), and the input type | |
1039 | struct sec (which is a bfd-defined data type). The obj_section | |
1040 | contains a pointer to the bfd struct sec section. */ | |
1041 | ||
1042 | struct obj_section * | |
fba45db2 | 1043 | find_pc_sect_section (CORE_ADDR pc, struct sec *section) |
c906108c SS |
1044 | { |
1045 | struct obj_section *s; | |
1046 | struct objfile *objfile; | |
c5aa993b | 1047 | |
96baa820 | 1048 | ALL_OBJSECTIONS (objfile, s) |
c5aa993b JM |
1049 | if ((section == 0 || section == s->the_bfd_section) && |
1050 | s->addr <= pc && pc < s->endaddr) | |
c5aa993b | 1051 | return (s); |
c906108c | 1052 | |
c5aa993b | 1053 | return (NULL); |
c906108c SS |
1054 | } |
1055 | ||
1056 | /* Returns a section whose range includes PC or NULL if none found. | |
1057 | Backward compatibility, no section. */ | |
1058 | ||
1059 | struct obj_section * | |
fba45db2 | 1060 | find_pc_section (CORE_ADDR pc) |
c906108c SS |
1061 | { |
1062 | return find_pc_sect_section (pc, find_pc_mapped_section (pc)); | |
1063 | } | |
c5aa993b | 1064 | |
c906108c SS |
1065 | |
1066 | /* In SVR4, we recognize a trampoline by it's section name. | |
1067 | That is, if the pc is in a section named ".plt" then we are in | |
1068 | a trampoline. */ | |
1069 | ||
1070 | int | |
fba45db2 | 1071 | in_plt_section (CORE_ADDR pc, char *name) |
c906108c SS |
1072 | { |
1073 | struct obj_section *s; | |
1074 | int retval = 0; | |
c5aa993b JM |
1075 | |
1076 | s = find_pc_section (pc); | |
1077 | ||
c906108c SS |
1078 | retval = (s != NULL |
1079 | && s->the_bfd_section->name != NULL | |
1080 | && STREQ (s->the_bfd_section->name, ".plt")); | |
c5aa993b | 1081 | return (retval); |
c906108c | 1082 | } |
7be570e7 JM |
1083 | |
1084 | /* Return nonzero if NAME is in the import list of OBJFILE. Else | |
1085 | return zero. */ | |
1086 | ||
1087 | int | |
fba45db2 | 1088 | is_in_import_list (char *name, struct objfile *objfile) |
7be570e7 JM |
1089 | { |
1090 | register int i; | |
1091 | ||
1092 | if (!objfile || !name || !*name) | |
1093 | return 0; | |
1094 | ||
1095 | for (i = 0; i < objfile->import_list_size; i++) | |
1096 | if (objfile->import_list[i] && STREQ (name, objfile->import_list[i])) | |
1097 | return 1; | |
1098 | return 0; | |
1099 | } | |
1100 |