1 /* GDB routines for manipulating objfiles.
3 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 2001, 2002, 2003 Free Software Foundation, Inc.
6 Contributed by Cygnus Support, using pieces from other GDB modules.
8 This file is part of GDB.
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.
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.
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. */
25 /* This file contains support routines for creating, manipulating, and
26 destroying objfile structures. */
29 #include "bfd.h" /* Binary File Description */
33 #include "gdb-stabs.h"
37 #include <sys/types.h>
40 #include "gdb_obstack.h"
41 #include "gdb_string.h"
44 #include "breakpoint.h"
46 /* Prototypes for local functions */
48 #if defined(USE_MMALLOC) && defined(HAVE_MMAP)
52 static int open_existing_mapped_file (char *, long, int);
54 static int open_mapped_file (char *filename
, long mtime
, int flags
);
56 static void *map_to_file (int);
58 #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
60 static void add_to_objfile_sections (bfd
*, sec_ptr
, void *);
62 /* Externally visible variables that are owned by this module.
63 See declarations in objfile.h for more info. */
65 struct objfile
*object_files
; /* Linked list of all objfiles */
66 struct objfile
*current_objfile
; /* For symbol file being read in */
67 struct objfile
*symfile_objfile
; /* Main symbol table loaded from */
68 struct objfile
*rt_common_objfile
; /* For runtime common symbols */
70 int mapped_symbol_files
; /* Try to use mapped symbol files */
72 /* Locate all mappable sections of a BFD file.
73 objfile_p_char is a char * to get it through
74 bfd_map_over_sections; we cast it back to its proper type. */
76 #ifndef TARGET_KEEP_SECTION
77 #define TARGET_KEEP_SECTION(ASECT) 0
80 /* Called via bfd_map_over_sections to build up the section table that
81 the objfile references. The objfile contains pointers to the start
82 of the table (objfile->sections) and to the first location after
83 the end of the table (objfile->sections_end). */
86 add_to_objfile_sections (bfd
*abfd
, sec_ptr asect
, void *objfile_p_char
)
88 struct objfile
*objfile
= (struct objfile
*) objfile_p_char
;
89 struct obj_section section
;
92 aflag
= bfd_get_section_flags (abfd
, asect
);
94 if (!(aflag
& SEC_ALLOC
) && !(TARGET_KEEP_SECTION (asect
)))
97 if (0 == bfd_section_size (abfd
, asect
))
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
);
105 obstack_grow (&objfile
->psymbol_obstack
, (char *) §ion
, sizeof (section
));
106 objfile
->sections_end
= (struct obj_section
*) (((unsigned long) objfile
->sections_end
) + 1);
109 /* Builds a section table for OBJFILE.
110 Returns 0 if OK, 1 on error (in which case bfd_error contains the
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.
119 Also note that the OFFSET and OVLY_MAPPED in each table entry
120 are initialized to zero.
122 Also note that if anything else writes to the psymbol obstack while
123 we are building the table, we're pretty much hosed. */
126 build_objfile_section_table (struct objfile
*objfile
)
128 /* objfile->sections can be already set when reading a mapped symbol
129 file. I believe that we do need to rebuild the section table in
130 this case (we rebuild other things derived from the bfd), but we
131 can't free the old one (it's in the psymbol_obstack). So we just
132 waste some memory. */
134 objfile
->sections_end
= 0;
135 bfd_map_over_sections (objfile
->obfd
, add_to_objfile_sections
, (char *) objfile
);
136 objfile
->sections
= (struct obj_section
*)
137 obstack_finish (&objfile
->psymbol_obstack
);
138 objfile
->sections_end
= objfile
->sections
+ (unsigned long) objfile
->sections_end
;
142 /* Given a pointer to an initialized bfd (ABFD) and some flag bits
143 allocate a new objfile struct, fill it in as best we can, link it
144 into the list of all known objfiles, and return a pointer to the
147 The FLAGS word contains various bits (OBJF_*) that can be taken as
148 requests for specific operations, like trying to open a mapped
149 version of the objfile (OBJF_MAPPED). Other bits like
150 OBJF_SHARED are simply copied through to the new objfile flags
153 /* NOTE: carlton/2003-02-04: This function is called with args NULL, 0
154 by jv-lang.c, to create an artificial objfile used to hold
155 information about dynamically-loaded Java classes. Unfortunately,
156 that branch of this function doesn't get tested very frequently, so
157 it's prone to breakage. (E.g. at one time the name was set to NULL
158 in that situation, which broke a loop over all names in the dynamic
159 library loader.) If you change this function, please try to leave
160 things in a consistent state even if abfd is NULL. */
163 allocate_objfile (bfd
*abfd
, int flags
)
165 struct objfile
*objfile
= NULL
;
166 struct objfile
*last_one
= NULL
;
168 if (mapped_symbol_files
)
169 flags
|= OBJF_MAPPED
;
171 #if defined(USE_MMALLOC) && defined(HAVE_MMAP)
175 /* If we can support mapped symbol files, try to open/reopen the
176 mapped file that corresponds to the file from which we wish to
177 read symbols. If the objfile is to be mapped, we must malloc
178 the structure itself using the mmap version, and arrange that
179 all memory allocation for the objfile uses the mmap routines.
180 If we are reusing an existing mapped file, from which we get
181 our objfile pointer, we have to make sure that we update the
182 pointers to the alloc/free functions in the obstack, in case
183 these functions have moved within the current gdb. */
187 fd
= open_mapped_file (bfd_get_filename (abfd
), bfd_get_mtime (abfd
),
193 if ((md
= map_to_file (fd
)) == NULL
)
197 else if ((objfile
= (struct objfile
*) mmalloc_getkey (md
, 0)) != NULL
)
199 /* Update memory corruption handler function addresses. */
203 /* Update pointers to functions to *our* copies */
204 if (objfile
->demangled_names_hash
)
205 htab_set_functions_ex
206 (objfile
->demangled_names_hash
, htab_hash_string
,
207 (int (*) (const void *, const void *)) streq
, NULL
,
208 objfile
->md
, xmcalloc
, xmfree
);
209 obstack_chunkfun (&objfile
->psymbol_cache
.cache
, xmmalloc
);
210 obstack_freefun (&objfile
->psymbol_cache
.cache
, xmfree
);
211 obstack_chunkfun (&objfile
->macro_cache
.cache
, xmmalloc
);
212 obstack_freefun (&objfile
->macro_cache
.cache
, xmfree
);
213 obstack_chunkfun (&objfile
->psymbol_obstack
, xmmalloc
);
214 obstack_freefun (&objfile
->psymbol_obstack
, xmfree
);
215 obstack_chunkfun (&objfile
->symbol_obstack
, xmmalloc
);
216 obstack_freefun (&objfile
->symbol_obstack
, xmfree
);
217 obstack_chunkfun (&objfile
->type_obstack
, xmmalloc
);
218 obstack_freefun (&objfile
->type_obstack
, xmfree
);
219 /* If already in objfile list, unlink it. */
220 unlink_objfile (objfile
);
221 /* Forget things specific to a particular gdb, may have changed. */
227 /* Set up to detect internal memory corruption. MUST be
228 done before the first malloc. See comments in
229 init_malloc() and mmcheck(). */
233 objfile
= (struct objfile
*)
234 xmmalloc (md
, sizeof (struct objfile
));
235 memset (objfile
, 0, sizeof (struct objfile
));
238 objfile
->flags
|= OBJF_MAPPED
;
239 mmalloc_setkey (objfile
->md
, 0, objfile
);
240 obstack_specify_allocation_with_arg (&objfile
->psymbol_cache
.cache
,
241 0, 0, xmmalloc
, xmfree
,
243 obstack_specify_allocation_with_arg (&objfile
->macro_cache
.cache
,
244 0, 0, xmmalloc
, xmfree
,
246 obstack_specify_allocation_with_arg (&objfile
->psymbol_obstack
,
247 0, 0, xmmalloc
, xmfree
,
249 obstack_specify_allocation_with_arg (&objfile
->symbol_obstack
,
250 0, 0, xmmalloc
, xmfree
,
252 obstack_specify_allocation_with_arg (&objfile
->type_obstack
,
253 0, 0, xmmalloc
, xmfree
,
258 if ((flags
& OBJF_MAPPED
) && (objfile
== NULL
))
260 warning ("symbol table for '%s' will not be mapped",
261 bfd_get_filename (abfd
));
262 flags
&= ~OBJF_MAPPED
;
265 #else /* !defined(USE_MMALLOC) || !defined(HAVE_MMAP) */
267 if (flags
& OBJF_MAPPED
)
269 warning ("mapped symbol tables are not supported on this machine; missing or broken mmap().");
271 /* Turn off the global flag so we don't try to do mapped symbol tables
272 any more, which shuts up gdb unless the user specifically gives the
273 "mapped" keyword again. */
275 mapped_symbol_files
= 0;
276 flags
&= ~OBJF_MAPPED
;
279 #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
281 /* If we don't support mapped symbol files, didn't ask for the file to be
282 mapped, or failed to open the mapped file for some reason, then revert
283 back to an unmapped objfile. */
287 objfile
= (struct objfile
*) xmalloc (sizeof (struct objfile
));
288 memset (objfile
, 0, sizeof (struct objfile
));
290 objfile
->psymbol_cache
= bcache_xmalloc ();
291 objfile
->macro_cache
= bcache_xmalloc ();
292 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0, xmalloc
,
294 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0, xmalloc
,
296 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0, xmalloc
,
298 flags
&= ~OBJF_MAPPED
;
300 terminate_minimal_symbol_table (objfile
);
303 /* Update the per-objfile information that comes from the bfd, ensuring
304 that any data that is reference is saved in the per-objfile data
307 objfile
->obfd
= abfd
;
308 if (objfile
->name
!= NULL
)
310 xmfree (objfile
->md
, objfile
->name
);
314 objfile
->name
= mstrsave (objfile
->md
, bfd_get_filename (abfd
));
315 objfile
->mtime
= bfd_get_mtime (abfd
);
317 /* Build section table. */
319 if (build_objfile_section_table (objfile
))
321 error ("Can't find the file sections in `%s': %s",
322 objfile
->name
, bfd_errmsg (bfd_get_error ()));
327 objfile
->name
= "<<anonymous objfile>>";
330 /* Initialize the section indexes for this objfile, so that we can
331 later detect if they are used w/o being properly assigned to. */
333 objfile
->sect_index_text
= -1;
334 objfile
->sect_index_data
= -1;
335 objfile
->sect_index_bss
= -1;
336 objfile
->sect_index_rodata
= -1;
338 /* Add this file onto the tail of the linked list of other such files. */
340 objfile
->next
= NULL
;
341 if (object_files
== NULL
)
342 object_files
= objfile
;
345 for (last_one
= object_files
;
347 last_one
= last_one
->next
);
348 last_one
->next
= objfile
;
351 /* Save passed in flag bits. */
352 objfile
->flags
|= flags
;
358 /* Create the terminating entry of OBJFILE's minimal symbol table.
359 If OBJFILE->msymbols is zero, allocate a single entry from
360 OBJFILE->symbol_obstack; otherwise, just initialize
361 OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */
363 terminate_minimal_symbol_table (struct objfile
*objfile
)
365 if (! objfile
->msymbols
)
366 objfile
->msymbols
= ((struct minimal_symbol
*)
367 obstack_alloc (&objfile
->symbol_obstack
,
368 sizeof (objfile
->msymbols
[0])));
371 struct minimal_symbol
*m
372 = &objfile
->msymbols
[objfile
->minimal_symbol_count
];
374 memset (m
, 0, sizeof (*m
));
375 SYMBOL_NAME (m
) = NULL
;
376 SYMBOL_VALUE_ADDRESS (m
) = 0;
377 MSYMBOL_INFO (m
) = NULL
;
378 MSYMBOL_TYPE (m
) = mst_unknown
;
379 SYMBOL_INIT_LANGUAGE_SPECIFIC (m
, language_unknown
);
384 /* Put one object file before a specified on in the global list.
385 This can be used to make sure an object file is destroyed before
386 another when using ALL_OBJFILES_SAFE to free all objfiles. */
388 put_objfile_before (struct objfile
*objfile
, struct objfile
*before_this
)
390 struct objfile
**objp
;
392 unlink_objfile (objfile
);
394 for (objp
= &object_files
; *objp
!= NULL
; objp
= &((*objp
)->next
))
396 if (*objp
== before_this
)
398 objfile
->next
= *objp
;
404 internal_error (__FILE__
, __LINE__
,
405 "put_objfile_before: before objfile not in list");
408 /* Put OBJFILE at the front of the list. */
411 objfile_to_front (struct objfile
*objfile
)
413 struct objfile
**objp
;
414 for (objp
= &object_files
; *objp
!= NULL
; objp
= &((*objp
)->next
))
416 if (*objp
== objfile
)
418 /* Unhook it from where it is. */
419 *objp
= objfile
->next
;
420 /* Put it in the front. */
421 objfile
->next
= object_files
;
422 object_files
= objfile
;
428 /* Unlink OBJFILE from the list of known objfiles, if it is found in the
431 It is not a bug, or error, to call this function if OBJFILE is not known
432 to be in the current list. This is done in the case of mapped objfiles,
433 for example, just to ensure that the mapped objfile doesn't appear twice
434 in the list. Since the list is threaded, linking in a mapped objfile
435 twice would create a circular list.
437 If OBJFILE turns out to be in the list, we zap it's NEXT pointer after
438 unlinking it, just to ensure that we have completely severed any linkages
439 between the OBJFILE and the list. */
442 unlink_objfile (struct objfile
*objfile
)
444 struct objfile
**objpp
;
446 for (objpp
= &object_files
; *objpp
!= NULL
; objpp
= &((*objpp
)->next
))
448 if (*objpp
== objfile
)
450 *objpp
= (*objpp
)->next
;
451 objfile
->next
= NULL
;
456 internal_error (__FILE__
, __LINE__
,
457 "unlink_objfile: objfile already unlinked");
461 /* Destroy an objfile and all the symtabs and psymtabs under it. Note
462 that as much as possible is allocated on the symbol_obstack and
463 psymbol_obstack, so that the memory can be efficiently freed.
465 Things which we do NOT free because they are not in malloc'd memory
466 or not in memory specific to the objfile include:
470 FIXME: If the objfile is using reusable symbol information (via mmalloc),
471 then we need to take into account the fact that more than one process
472 may be using the symbol information at the same time (when mmalloc is
473 extended to support cooperative locking). When more than one process
474 is using the mapped symbol info, we need to be more careful about when
475 we free objects in the reusable area. */
478 free_objfile (struct objfile
*objfile
)
480 if (objfile
->separate_debug_objfile
)
482 free_objfile (objfile
->separate_debug_objfile
);
485 if (objfile
->separate_debug_objfile_backlink
)
487 /* We freed the separate debug file, make sure the base objfile
488 doesn't reference it. */
489 objfile
->separate_debug_objfile_backlink
->separate_debug_objfile
= NULL
;
492 /* First do any symbol file specific actions required when we are
493 finished with a particular symbol file. Note that if the objfile
494 is using reusable symbol information (via mmalloc) then each of
495 these routines is responsible for doing the correct thing, either
496 freeing things which are valid only during this particular gdb
497 execution, or leaving them to be reused during the next one. */
499 if (objfile
->sf
!= NULL
)
501 (*objfile
->sf
->sym_finish
) (objfile
);
504 /* We always close the bfd. */
506 if (objfile
->obfd
!= NULL
)
508 char *name
= bfd_get_filename (objfile
->obfd
);
509 if (!bfd_close (objfile
->obfd
))
510 warning ("cannot close \"%s\": %s",
511 name
, bfd_errmsg (bfd_get_error ()));
515 /* Remove it from the chain of all objfiles. */
517 unlink_objfile (objfile
);
519 /* If we are going to free the runtime common objfile, mark it
522 if (objfile
== rt_common_objfile
)
523 rt_common_objfile
= NULL
;
525 /* Before the symbol table code was redone to make it easier to
526 selectively load and remove information particular to a specific
527 linkage unit, gdb used to do these things whenever the monolithic
528 symbol table was blown away. How much still needs to be done
529 is unknown, but we play it safe for now and keep each action until
530 it is shown to be no longer needed. */
532 /* I *think* all our callers call clear_symtab_users. If so, no need
533 to call this here. */
534 clear_pc_function_cache ();
536 /* The last thing we do is free the objfile struct itself for the
537 non-reusable case, or detach from the mapped file for the
538 reusable case. Note that the mmalloc_detach or the xmfree() is
539 the last thing we can do with this objfile. */
541 #if defined(USE_MMALLOC) && defined(HAVE_MMAP)
543 if (objfile
->flags
& OBJF_MAPPED
)
545 /* Remember the fd so we can close it. We can't close it before
546 doing the detach, and after the detach the objfile is gone. */
549 mmfd
= objfile
->mmfd
;
550 mmalloc_detach (objfile
->md
);
555 #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
557 /* If we still have an objfile, then either we don't support reusable
558 objfiles or this one was not reusable. So free it normally. */
562 if (objfile
->name
!= NULL
)
564 xmfree (objfile
->md
, objfile
->name
);
566 if (objfile
->global_psymbols
.list
)
567 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
568 if (objfile
->static_psymbols
.list
)
569 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
570 /* Free the obstacks for non-reusable objfiles */
571 bcache_xfree (objfile
->psymbol_cache
);
572 bcache_xfree (objfile
->macro_cache
);
573 if (objfile
->demangled_names_hash
)
574 htab_delete (objfile
->demangled_names_hash
);
575 obstack_free (&objfile
->psymbol_obstack
, 0);
576 obstack_free (&objfile
->symbol_obstack
, 0);
577 obstack_free (&objfile
->type_obstack
, 0);
578 xmfree (objfile
->md
, objfile
);
584 do_free_objfile_cleanup (void *obj
)
590 make_cleanup_free_objfile (struct objfile
*obj
)
592 return make_cleanup (do_free_objfile_cleanup
, obj
);
595 /* Free all the object files at once and clean up their users. */
598 free_all_objfiles (void)
600 struct objfile
*objfile
, *temp
;
602 ALL_OBJFILES_SAFE (objfile
, temp
)
604 free_objfile (objfile
);
606 clear_symtab_users ();
609 /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS
610 entries in new_offsets. */
612 objfile_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
)
614 struct section_offsets
*delta
=
615 (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
619 int something_changed
= 0;
620 for (i
= 0; i
< objfile
->num_sections
; ++i
)
623 ANOFFSET (new_offsets
, i
) - ANOFFSET (objfile
->section_offsets
, i
);
624 if (ANOFFSET (delta
, i
) != 0)
625 something_changed
= 1;
627 if (!something_changed
)
631 /* OK, get all the symtabs. */
635 ALL_OBJFILE_SYMTABS (objfile
, s
)
638 struct blockvector
*bv
;
641 /* First the line table. */
645 for (i
= 0; i
< l
->nitems
; ++i
)
646 l
->item
[i
].pc
+= ANOFFSET (delta
, s
->block_line_section
);
649 /* Don't relocate a shared blockvector more than once. */
653 bv
= BLOCKVECTOR (s
);
654 for (i
= 0; i
< BLOCKVECTOR_NBLOCKS (bv
); ++i
)
660 b
= BLOCKVECTOR_BLOCK (bv
, i
);
661 BLOCK_START (b
) += ANOFFSET (delta
, s
->block_line_section
);
662 BLOCK_END (b
) += ANOFFSET (delta
, s
->block_line_section
);
664 ALL_BLOCK_SYMBOLS (b
, j
, sym
)
666 fixup_symbol_section (sym
, objfile
);
668 /* The RS6000 code from which this was taken skipped
669 any symbols in STRUCT_NAMESPACE or UNDEF_NAMESPACE.
670 But I'm leaving out that test, on the theory that
671 they can't possibly pass the tests below. */
672 if ((SYMBOL_CLASS (sym
) == LOC_LABEL
673 || SYMBOL_CLASS (sym
) == LOC_STATIC
674 || SYMBOL_CLASS (sym
) == LOC_INDIRECT
)
675 && SYMBOL_SECTION (sym
) >= 0)
677 SYMBOL_VALUE_ADDRESS (sym
) +=
678 ANOFFSET (delta
, SYMBOL_SECTION (sym
));
680 #ifdef MIPS_EFI_SYMBOL_NAME
681 /* Relocate Extra Function Info for ecoff. */
683 else if (SYMBOL_CLASS (sym
) == LOC_CONST
684 && SYMBOL_NAMESPACE (sym
) == LABEL_NAMESPACE
685 && strcmp (SYMBOL_NAME (sym
), MIPS_EFI_SYMBOL_NAME
) == 0)
686 ecoff_relocate_efi (sym
, ANOFFSET (delta
,
687 s
->block_line_section
));
695 struct partial_symtab
*p
;
697 ALL_OBJFILE_PSYMTABS (objfile
, p
)
699 p
->textlow
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
700 p
->texthigh
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
705 struct partial_symbol
**psym
;
707 for (psym
= objfile
->global_psymbols
.list
;
708 psym
< objfile
->global_psymbols
.next
;
711 fixup_psymbol_section (*psym
, objfile
);
712 if (SYMBOL_SECTION (*psym
) >= 0)
713 SYMBOL_VALUE_ADDRESS (*psym
) += ANOFFSET (delta
,
714 SYMBOL_SECTION (*psym
));
716 for (psym
= objfile
->static_psymbols
.list
;
717 psym
< objfile
->static_psymbols
.next
;
720 fixup_psymbol_section (*psym
, objfile
);
721 if (SYMBOL_SECTION (*psym
) >= 0)
722 SYMBOL_VALUE_ADDRESS (*psym
) += ANOFFSET (delta
,
723 SYMBOL_SECTION (*psym
));
728 struct minimal_symbol
*msym
;
729 ALL_OBJFILE_MSYMBOLS (objfile
, msym
)
730 if (SYMBOL_SECTION (msym
) >= 0)
731 SYMBOL_VALUE_ADDRESS (msym
) += ANOFFSET (delta
, SYMBOL_SECTION (msym
));
733 /* Relocating different sections by different amounts may cause the symbols
734 to be out of order. */
735 msymbols_sort (objfile
);
739 for (i
= 0; i
< objfile
->num_sections
; ++i
)
740 (objfile
->section_offsets
)->offsets
[i
] = ANOFFSET (new_offsets
, i
);
743 if (objfile
->ei
.entry_point
!= ~(CORE_ADDR
) 0)
745 /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT
746 only as a fallback. */
747 struct obj_section
*s
;
748 s
= find_pc_section (objfile
->ei
.entry_point
);
750 objfile
->ei
.entry_point
+= ANOFFSET (delta
, s
->the_bfd_section
->index
);
752 objfile
->ei
.entry_point
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
756 struct obj_section
*s
;
759 abfd
= objfile
->obfd
;
761 ALL_OBJFILE_OSECTIONS (objfile
, s
)
763 int idx
= s
->the_bfd_section
->index
;
765 s
->addr
+= ANOFFSET (delta
, idx
);
766 s
->endaddr
+= ANOFFSET (delta
, idx
);
770 if (objfile
->ei
.entry_func_lowpc
!= INVALID_ENTRY_LOWPC
)
772 objfile
->ei
.entry_func_lowpc
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
773 objfile
->ei
.entry_func_highpc
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
776 if (objfile
->ei
.entry_file_lowpc
!= INVALID_ENTRY_LOWPC
)
778 objfile
->ei
.entry_file_lowpc
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
779 objfile
->ei
.entry_file_highpc
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
782 if (objfile
->ei
.main_func_lowpc
!= INVALID_ENTRY_LOWPC
)
784 objfile
->ei
.main_func_lowpc
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
785 objfile
->ei
.main_func_highpc
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
788 /* Relocate breakpoints as necessary, after things are relocated. */
789 breakpoint_re_set ();
792 /* Many places in gdb want to test just to see if we have any partial
793 symbols available. This function returns zero if none are currently
794 available, nonzero otherwise. */
797 have_partial_symbols (void)
803 if (ofp
->psymtabs
!= NULL
)
811 /* Many places in gdb want to test just to see if we have any full
812 symbols available. This function returns zero if none are currently
813 available, nonzero otherwise. */
816 have_full_symbols (void)
822 if (ofp
->symtabs
!= NULL
)
831 /* This operations deletes all objfile entries that represent solibs that
832 weren't explicitly loaded by the user, via e.g., the add-symbol-file
836 objfile_purge_solibs (void)
838 struct objfile
*objf
;
839 struct objfile
*temp
;
841 ALL_OBJFILES_SAFE (objf
, temp
)
843 /* We assume that the solib package has been purged already, or will
846 if (!(objf
->flags
& OBJF_USERLOADED
) && (objf
->flags
& OBJF_SHARED
))
852 /* Many places in gdb want to test just to see if we have any minimal
853 symbols available. This function returns zero if none are currently
854 available, nonzero otherwise. */
857 have_minimal_symbols (void)
863 if (ofp
->minimal_symbol_count
> 0)
871 #if defined(USE_MMALLOC) && defined(HAVE_MMAP)
873 /* Given the name of a mapped symbol file in SYMSFILENAME, and the timestamp
874 of the corresponding symbol file in MTIME, try to open an existing file
875 with the name SYMSFILENAME and verify it is more recent than the base
876 file by checking it's timestamp against MTIME.
878 If SYMSFILENAME does not exist (or can't be stat'd), simply returns -1.
880 If SYMSFILENAME does exist, but is out of date, we check to see if the
881 user has specified creation of a mapped file. If so, we don't issue
882 any warning message because we will be creating a new mapped file anyway,
883 overwriting the old one. If not, then we issue a warning message so that
884 the user will know why we aren't using this existing mapped symbol file.
885 In either case, we return -1.
887 If SYMSFILENAME does exist and is not out of date, but can't be opened for
888 some reason, then prints an appropriate system error message and returns -1.
890 Otherwise, returns the open file descriptor. */
893 open_existing_mapped_file (char *symsfilename
, long mtime
, int flags
)
898 if (stat (symsfilename
, &sbuf
) == 0)
900 if (sbuf
.st_mtime
< mtime
)
902 if (!(flags
& OBJF_MAPPED
))
904 warning ("mapped symbol file `%s' is out of date, ignored it",
908 else if ((fd
= open (symsfilename
, O_RDWR
)) < 0)
912 printf_unfiltered (error_pre_print
);
914 print_sys_errmsg (symsfilename
, errno
);
920 /* Look for a mapped symbol file that corresponds to FILENAME and is more
921 recent than MTIME. If MAPPED is nonzero, the user has asked that gdb
922 use a mapped symbol file for this file, so create a new one if one does
925 If found, then return an open file descriptor for the file, otherwise
928 This routine is responsible for implementing the policy that generates
929 the name of the mapped symbol file from the name of a file containing
930 symbols that gdb would like to read. Currently this policy is to append
931 ".syms" to the name of the file.
933 This routine is also responsible for implementing the policy that
934 determines where the mapped symbol file is found (the search path).
935 This policy is that when reading an existing mapped file, a file of
936 the correct name in the current directory takes precedence over a
937 file of the correct name in the same directory as the symbol file.
938 When creating a new mapped file, it is always created in the current
939 directory. This helps to minimize the chances of a user unknowingly
940 creating big mapped files in places like /bin and /usr/local/bin, and
941 allows a local copy to override a manually installed global copy (in
942 /bin for example). */
945 open_mapped_file (char *filename
, long mtime
, int flags
)
950 /* First try to open an existing file in the current directory, and
951 then try the directory where the symbol file is located. */
953 symsfilename
= concat ("./", lbasename (filename
), ".syms", (char *) NULL
);
954 if ((fd
= open_existing_mapped_file (symsfilename
, mtime
, flags
)) < 0)
956 xfree (symsfilename
);
957 symsfilename
= concat (filename
, ".syms", (char *) NULL
);
958 fd
= open_existing_mapped_file (symsfilename
, mtime
, flags
);
961 /* If we don't have an open file by now, then either the file does not
962 already exist, or the base file has changed since it was created. In
963 either case, if the user has specified use of a mapped file, then
964 create a new mapped file, truncating any existing one. If we can't
965 create one, print a system error message saying why we can't.
967 By default the file is rw for everyone, with the user's umask taking
968 care of turning off the permissions the user wants off. */
970 if ((fd
< 0) && (flags
& OBJF_MAPPED
))
972 xfree (symsfilename
);
973 symsfilename
= concat ("./", lbasename (filename
), ".syms",
975 if ((fd
= open (symsfilename
, O_RDWR
| O_CREAT
| O_TRUNC
, 0666)) < 0)
979 printf_unfiltered (error_pre_print
);
981 print_sys_errmsg (symsfilename
, errno
);
985 xfree (symsfilename
);
995 md
= mmalloc_attach (fd
, 0);
998 mapto
= (CORE_ADDR
) mmalloc_getkey (md
, 1);
999 md
= mmalloc_detach (md
);
1002 /* FIXME: should figure out why detach failed */
1005 else if (mapto
!= (CORE_ADDR
) NULL
)
1007 /* This mapping file needs to be remapped at "mapto" */
1008 md
= mmalloc_attach (fd
, mapto
);
1012 /* This is a freshly created mapping file. */
1013 mapto
= (CORE_ADDR
) mmalloc_findbase (20 * 1024 * 1024);
1016 /* To avoid reusing the freshly created mapping file, at the
1017 address selected by mmap, we must truncate it before trying
1018 to do an attach at the address we want. */
1020 md
= mmalloc_attach (fd
, mapto
);
1023 mmalloc_setkey (md
, 1, mapto
);
1031 #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
1033 /* Returns a section whose range includes PC and SECTION,
1034 or NULL if none found. Note the distinction between the return type,
1035 struct obj_section (which is defined in gdb), and the input type
1036 struct sec (which is a bfd-defined data type). The obj_section
1037 contains a pointer to the bfd struct sec section. */
1039 struct obj_section
*
1040 find_pc_sect_section (CORE_ADDR pc
, struct sec
*section
)
1042 struct obj_section
*s
;
1043 struct objfile
*objfile
;
1045 ALL_OBJSECTIONS (objfile
, s
)
1046 if ((section
== 0 || section
== s
->the_bfd_section
) &&
1047 s
->addr
<= pc
&& pc
< s
->endaddr
)
1053 /* Returns a section whose range includes PC or NULL if none found.
1054 Backward compatibility, no section. */
1056 struct obj_section
*
1057 find_pc_section (CORE_ADDR pc
)
1059 return find_pc_sect_section (pc
, find_pc_mapped_section (pc
));
1063 /* In SVR4, we recognize a trampoline by it's section name.
1064 That is, if the pc is in a section named ".plt" then we are in
1068 in_plt_section (CORE_ADDR pc
, char *name
)
1070 struct obj_section
*s
;
1073 s
= find_pc_section (pc
);
1076 && s
->the_bfd_section
->name
!= NULL
1077 && STREQ (s
->the_bfd_section
->name
, ".plt"));
1081 /* Return nonzero if NAME is in the import list of OBJFILE. Else
1085 is_in_import_list (char *name
, struct objfile
*objfile
)
1089 if (!objfile
|| !name
|| !*name
)
1092 for (i
= 0; i
< objfile
->import_list_size
; i
++)
1093 if (objfile
->import_list
[i
] && STREQ (name
, objfile
->import_list
[i
]))