1 /* GDB routines for manipulating objfiles.
3 Copyright (C) 1992-2016 Free Software Foundation, Inc.
5 Contributed by Cygnus Support, using pieces from other GDB modules.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* This file contains support routines for creating, manipulating, and
23 destroying objfile structures. */
26 #include "bfd.h" /* Binary File Description */
30 #include "gdb-stabs.h"
33 #include "expression.h"
34 #include "parser-defs.h"
36 #include <sys/types.h>
39 #include "gdb_obstack.h"
42 #include "breakpoint.h"
44 #include "dictionary.h"
47 #include "arch-utils.h"
50 #include "complaints.h"
58 /* Keep a registry of per-objfile data-pointers required by other GDB
61 DEFINE_REGISTRY (objfile
, REGISTRY_ACCESS_FIELD
)
63 /* Externally visible variables that are owned by this module.
64 See declarations in objfile.h for more info. */
66 struct objfile_pspace_info
68 struct obj_section
**sections
;
71 /* Nonzero if object files have been added since the section map
73 int new_objfiles_available
;
75 /* Nonzero if the section map MUST be updated before use. */
76 int section_map_dirty
;
78 /* Nonzero if section map updates should be inhibited if possible. */
82 /* Per-program-space data key. */
83 static const struct program_space_data
*objfiles_pspace_data
;
86 objfiles_pspace_data_cleanup (struct program_space
*pspace
, void *arg
)
88 struct objfile_pspace_info
*info
= (struct objfile_pspace_info
*) arg
;
90 xfree (info
->sections
);
94 /* Get the current svr4 data. If none is found yet, add it now. This
95 function always returns a valid object. */
97 static struct objfile_pspace_info
*
98 get_objfile_pspace_data (struct program_space
*pspace
)
100 struct objfile_pspace_info
*info
;
102 info
= ((struct objfile_pspace_info
*)
103 program_space_data (pspace
, objfiles_pspace_data
));
106 info
= XCNEW (struct objfile_pspace_info
);
107 set_program_space_data (pspace
, objfiles_pspace_data
, info
);
115 /* Per-BFD data key. */
117 static const struct bfd_data
*objfiles_bfd_data
;
119 /* Create the per-BFD storage object for OBJFILE. If ABFD is not
120 NULL, and it already has a per-BFD storage object, use that.
121 Otherwise, allocate a new per-BFD storage object. If ABFD is not
122 NULL, the object is allocated on the BFD; otherwise it is allocated
123 on OBJFILE's obstack. Note that it is not safe to call this
124 multiple times for a given OBJFILE -- it can only be called when
125 allocating or re-initializing OBJFILE. */
127 static struct objfile_per_bfd_storage
*
128 get_objfile_bfd_data (struct objfile
*objfile
, struct bfd
*abfd
)
130 struct objfile_per_bfd_storage
*storage
= NULL
;
133 storage
= ((struct objfile_per_bfd_storage
*)
134 bfd_data (abfd
, objfiles_bfd_data
));
138 /* If the object requires gdb to do relocations, we simply fall
139 back to not sharing data across users. These cases are rare
140 enough that this seems reasonable. */
141 if (abfd
!= NULL
&& !gdb_bfd_requires_relocations (abfd
))
144 = ((struct objfile_per_bfd_storage
*)
145 bfd_zalloc (abfd
, sizeof (struct objfile_per_bfd_storage
)));
146 set_bfd_data (abfd
, objfiles_bfd_data
, storage
);
149 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
150 struct objfile_per_bfd_storage
);
152 /* Look up the gdbarch associated with the BFD. */
154 storage
->gdbarch
= gdbarch_from_bfd (abfd
);
156 obstack_init (&storage
->storage_obstack
);
157 storage
->filename_cache
= bcache_xmalloc (NULL
, NULL
);
158 storage
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
159 storage
->language_of_main
= language_unknown
;
168 free_objfile_per_bfd_storage (struct objfile_per_bfd_storage
*storage
)
170 bcache_xfree (storage
->filename_cache
);
171 bcache_xfree (storage
->macro_cache
);
172 if (storage
->demangled_names_hash
)
173 htab_delete (storage
->demangled_names_hash
);
174 obstack_free (&storage
->storage_obstack
, 0);
177 /* A wrapper for free_objfile_per_bfd_storage that can be passed as a
178 cleanup function to the BFD registry. */
181 objfile_bfd_data_free (struct bfd
*unused
, void *d
)
183 free_objfile_per_bfd_storage ((struct objfile_per_bfd_storage
*) d
);
186 /* See objfiles.h. */
189 set_objfile_per_bfd (struct objfile
*objfile
)
191 objfile
->per_bfd
= get_objfile_bfd_data (objfile
, objfile
->obfd
);
194 /* Set the objfile's per-BFD notion of the "main" name and
198 set_objfile_main_name (struct objfile
*objfile
,
199 const char *name
, enum language lang
)
201 if (objfile
->per_bfd
->name_of_main
== NULL
202 || strcmp (objfile
->per_bfd
->name_of_main
, name
) != 0)
203 objfile
->per_bfd
->name_of_main
204 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
, name
,
206 objfile
->per_bfd
->language_of_main
= lang
;
209 /* Helper structure to map blocks to static link properties in hash tables. */
211 struct static_link_htab_entry
213 const struct block
*block
;
214 const struct dynamic_prop
*static_link
;
217 /* Return a hash code for struct static_link_htab_entry *P. */
220 static_link_htab_entry_hash (const void *p
)
222 const struct static_link_htab_entry
*e
223 = (const struct static_link_htab_entry
*) p
;
225 return htab_hash_pointer (e
->block
);
228 /* Return whether P1 an P2 (pointers to struct static_link_htab_entry) are
229 mappings for the same block. */
232 static_link_htab_entry_eq (const void *p1
, const void *p2
)
234 const struct static_link_htab_entry
*e1
235 = (const struct static_link_htab_entry
*) p1
;
236 const struct static_link_htab_entry
*e2
237 = (const struct static_link_htab_entry
*) p2
;
239 return e1
->block
== e2
->block
;
242 /* Register STATIC_LINK as the static link for BLOCK, which is part of OBJFILE.
243 Must not be called more than once for each BLOCK. */
246 objfile_register_static_link (struct objfile
*objfile
,
247 const struct block
*block
,
248 const struct dynamic_prop
*static_link
)
251 struct static_link_htab_entry lookup_entry
;
252 struct static_link_htab_entry
*entry
;
254 if (objfile
->static_links
== NULL
)
255 objfile
->static_links
= htab_create_alloc
256 (1, &static_link_htab_entry_hash
, static_link_htab_entry_eq
, NULL
,
259 /* Create a slot for the mapping, make sure it's the first mapping for this
260 block and then create the mapping itself. */
261 lookup_entry
.block
= block
;
262 slot
= htab_find_slot (objfile
->static_links
, &lookup_entry
, INSERT
);
263 gdb_assert (*slot
== NULL
);
265 entry
= (struct static_link_htab_entry
*) obstack_alloc
266 (&objfile
->objfile_obstack
, sizeof (*entry
));
267 entry
->block
= block
;
268 entry
->static_link
= static_link
;
269 *slot
= (void *) entry
;
272 /* Look for a static link for BLOCK, which is part of OBJFILE. Return NULL if
275 const struct dynamic_prop
*
276 objfile_lookup_static_link (struct objfile
*objfile
,
277 const struct block
*block
)
279 struct static_link_htab_entry
*entry
;
280 struct static_link_htab_entry lookup_entry
;
282 if (objfile
->static_links
== NULL
)
284 lookup_entry
.block
= block
;
286 = (struct static_link_htab_entry
*) htab_find (objfile
->static_links
,
291 gdb_assert (entry
->block
== block
);
292 return entry
->static_link
;
297 /* Called via bfd_map_over_sections to build up the section table that
298 the objfile references. The objfile contains pointers to the start
299 of the table (objfile->sections) and to the first location after
300 the end of the table (objfile->sections_end). */
303 add_to_objfile_sections_full (struct bfd
*abfd
, struct bfd_section
*asect
,
304 struct objfile
*objfile
, int force
)
306 struct obj_section
*section
;
312 aflag
= bfd_get_section_flags (abfd
, asect
);
313 if (!(aflag
& SEC_ALLOC
))
317 section
= &objfile
->sections
[gdb_bfd_section_index (abfd
, asect
)];
318 section
->objfile
= objfile
;
319 section
->the_bfd_section
= asect
;
320 section
->ovly_mapped
= 0;
324 add_to_objfile_sections (struct bfd
*abfd
, struct bfd_section
*asect
,
327 add_to_objfile_sections_full (abfd
, asect
, (struct objfile
*) objfilep
, 0);
330 /* Builds a section table for OBJFILE.
332 Note that the OFFSET and OVLY_MAPPED in each table entry are
333 initialized to zero. */
336 build_objfile_section_table (struct objfile
*objfile
)
338 int count
= gdb_bfd_count_sections (objfile
->obfd
);
340 objfile
->sections
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
343 objfile
->sections_end
= (objfile
->sections
+ count
);
344 bfd_map_over_sections (objfile
->obfd
,
345 add_to_objfile_sections
, (void *) objfile
);
347 /* See gdb_bfd_section_index. */
348 add_to_objfile_sections_full (objfile
->obfd
, bfd_com_section_ptr
, objfile
, 1);
349 add_to_objfile_sections_full (objfile
->obfd
, bfd_und_section_ptr
, objfile
, 1);
350 add_to_objfile_sections_full (objfile
->obfd
, bfd_abs_section_ptr
, objfile
, 1);
351 add_to_objfile_sections_full (objfile
->obfd
, bfd_ind_section_ptr
, objfile
, 1);
354 /* Given a pointer to an initialized bfd (ABFD) and some flag bits
355 allocate a new objfile struct, fill it in as best we can, link it
356 into the list of all known objfiles, and return a pointer to the
359 NAME should contain original non-canonicalized filename or other
360 identifier as entered by user. If there is no better source use
361 bfd_get_filename (ABFD). NAME may be NULL only if ABFD is NULL.
362 NAME content is copied into returned objfile.
364 The FLAGS word contains various bits (OBJF_*) that can be taken as
365 requests for specific operations. Other bits like OBJF_SHARED are
366 simply copied through to the new objfile flags member. */
369 allocate_objfile (bfd
*abfd
, const char *name
, objfile_flags flags
)
371 struct objfile
*objfile
;
374 objfile
= XCNEW (struct objfile
);
375 objfile
->psymbol_cache
= psymbol_bcache_init ();
376 /* We could use obstack_specify_allocation here instead, but
377 gdb_obstack.h specifies the alloc/dealloc functions. */
378 obstack_init (&objfile
->objfile_obstack
);
380 objfile_alloc_data (objfile
);
384 gdb_assert (abfd
== NULL
);
385 gdb_assert ((flags
& OBJF_NOT_FILENAME
) != 0);
386 expanded_name
= xstrdup ("<<anonymous objfile>>");
388 else if ((flags
& OBJF_NOT_FILENAME
) != 0
389 || is_target_filename (name
))
390 expanded_name
= xstrdup (name
);
392 expanded_name
= gdb_abspath (name
);
393 objfile
->original_name
394 = (char *) obstack_copy0 (&objfile
->objfile_obstack
,
396 strlen (expanded_name
));
397 xfree (expanded_name
);
399 /* Update the per-objfile information that comes from the bfd, ensuring
400 that any data that is reference is saved in the per-objfile data
403 objfile
->obfd
= abfd
;
407 objfile
->mtime
= bfd_get_mtime (abfd
);
409 /* Build section table. */
410 build_objfile_section_table (objfile
);
413 objfile
->per_bfd
= get_objfile_bfd_data (objfile
, abfd
);
414 objfile
->pspace
= current_program_space
;
416 terminate_minimal_symbol_table (objfile
);
418 /* Initialize the section indexes for this objfile, so that we can
419 later detect if they are used w/o being properly assigned to. */
421 objfile
->sect_index_text
= -1;
422 objfile
->sect_index_data
= -1;
423 objfile
->sect_index_bss
= -1;
424 objfile
->sect_index_rodata
= -1;
426 /* Add this file onto the tail of the linked list of other such files. */
428 objfile
->next
= NULL
;
429 if (object_files
== NULL
)
430 object_files
= objfile
;
433 struct objfile
*last_one
;
435 for (last_one
= object_files
;
437 last_one
= last_one
->next
);
438 last_one
->next
= objfile
;
441 /* Save passed in flag bits. */
442 objfile
->flags
|= flags
;
444 /* Rebuild section map next time we need it. */
445 get_objfile_pspace_data (objfile
->pspace
)->new_objfiles_available
= 1;
450 /* Retrieve the gdbarch associated with OBJFILE. */
453 get_objfile_arch (const struct objfile
*objfile
)
455 return objfile
->per_bfd
->gdbarch
;
458 /* If there is a valid and known entry point, function fills *ENTRY_P with it
459 and returns non-zero; otherwise it returns zero. */
462 entry_point_address_query (CORE_ADDR
*entry_p
)
464 if (symfile_objfile
== NULL
|| !symfile_objfile
->per_bfd
->ei
.entry_point_p
)
467 *entry_p
= (symfile_objfile
->per_bfd
->ei
.entry_point
468 + ANOFFSET (symfile_objfile
->section_offsets
,
469 symfile_objfile
->per_bfd
->ei
.the_bfd_section_index
));
474 /* Get current entry point address. Call error if it is not known. */
477 entry_point_address (void)
481 if (!entry_point_address_query (&retval
))
482 error (_("Entry point address is not known."));
487 /* Iterator on PARENT and every separate debug objfile of PARENT.
488 The usage pattern is:
489 for (objfile = parent;
491 objfile = objfile_separate_debug_iterate (parent, objfile))
496 objfile_separate_debug_iterate (const struct objfile
*parent
,
497 const struct objfile
*objfile
)
501 /* If any, return the first child. */
502 res
= objfile
->separate_debug_objfile
;
506 /* Common case where there is no separate debug objfile. */
507 if (objfile
== parent
)
510 /* Return the brother if any. Note that we don't iterate on brothers of
512 res
= objfile
->separate_debug_objfile_link
;
516 for (res
= objfile
->separate_debug_objfile_backlink
;
518 res
= res
->separate_debug_objfile_backlink
)
520 gdb_assert (res
!= NULL
);
521 if (res
->separate_debug_objfile_link
)
522 return res
->separate_debug_objfile_link
;
527 /* Put one object file before a specified on in the global list.
528 This can be used to make sure an object file is destroyed before
529 another when using ALL_OBJFILES_SAFE to free all objfiles. */
531 put_objfile_before (struct objfile
*objfile
, struct objfile
*before_this
)
533 struct objfile
**objp
;
535 unlink_objfile (objfile
);
537 for (objp
= &object_files
; *objp
!= NULL
; objp
= &((*objp
)->next
))
539 if (*objp
== before_this
)
541 objfile
->next
= *objp
;
547 internal_error (__FILE__
, __LINE__
,
548 _("put_objfile_before: before objfile not in list"));
551 /* Unlink OBJFILE from the list of known objfiles, if it is found in the
554 It is not a bug, or error, to call this function if OBJFILE is not known
555 to be in the current list. This is done in the case of mapped objfiles,
556 for example, just to ensure that the mapped objfile doesn't appear twice
557 in the list. Since the list is threaded, linking in a mapped objfile
558 twice would create a circular list.
560 If OBJFILE turns out to be in the list, we zap it's NEXT pointer after
561 unlinking it, just to ensure that we have completely severed any linkages
562 between the OBJFILE and the list. */
565 unlink_objfile (struct objfile
*objfile
)
567 struct objfile
**objpp
;
569 for (objpp
= &object_files
; *objpp
!= NULL
; objpp
= &((*objpp
)->next
))
571 if (*objpp
== objfile
)
573 *objpp
= (*objpp
)->next
;
574 objfile
->next
= NULL
;
579 internal_error (__FILE__
, __LINE__
,
580 _("unlink_objfile: objfile already unlinked"));
583 /* Add OBJFILE as a separate debug objfile of PARENT. */
586 add_separate_debug_objfile (struct objfile
*objfile
, struct objfile
*parent
)
588 gdb_assert (objfile
&& parent
);
590 /* Must not be already in a list. */
591 gdb_assert (objfile
->separate_debug_objfile_backlink
== NULL
);
592 gdb_assert (objfile
->separate_debug_objfile_link
== NULL
);
593 gdb_assert (objfile
->separate_debug_objfile
== NULL
);
594 gdb_assert (parent
->separate_debug_objfile_backlink
== NULL
);
595 gdb_assert (parent
->separate_debug_objfile_link
== NULL
);
597 objfile
->separate_debug_objfile_backlink
= parent
;
598 objfile
->separate_debug_objfile_link
= parent
->separate_debug_objfile
;
599 parent
->separate_debug_objfile
= objfile
;
601 /* Put the separate debug object before the normal one, this is so that
602 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
603 put_objfile_before (objfile
, parent
);
606 /* Free all separate debug objfile of OBJFILE, but don't free OBJFILE
610 free_objfile_separate_debug (struct objfile
*objfile
)
612 struct objfile
*child
;
614 for (child
= objfile
->separate_debug_objfile
; child
;)
616 struct objfile
*next_child
= child
->separate_debug_objfile_link
;
617 free_objfile (child
);
622 /* Destroy an objfile and all the symtabs and psymtabs under it. */
625 free_objfile (struct objfile
*objfile
)
627 /* First notify observers that this objfile is about to be freed. */
628 observer_notify_free_objfile (objfile
);
630 /* Free all separate debug objfiles. */
631 free_objfile_separate_debug (objfile
);
633 if (objfile
->separate_debug_objfile_backlink
)
635 /* We freed the separate debug file, make sure the base objfile
636 doesn't reference it. */
637 struct objfile
*child
;
639 child
= objfile
->separate_debug_objfile_backlink
->separate_debug_objfile
;
641 if (child
== objfile
)
643 /* OBJFILE is the first child. */
644 objfile
->separate_debug_objfile_backlink
->separate_debug_objfile
=
645 objfile
->separate_debug_objfile_link
;
649 /* Find OBJFILE in the list. */
652 if (child
->separate_debug_objfile_link
== objfile
)
654 child
->separate_debug_objfile_link
=
655 objfile
->separate_debug_objfile_link
;
658 child
= child
->separate_debug_objfile_link
;
664 /* Remove any references to this objfile in the global value
666 preserve_values (objfile
);
668 /* It still may reference data modules have associated with the objfile and
669 the symbol file data. */
670 forget_cached_source_info_for_objfile (objfile
);
672 breakpoint_free_objfile (objfile
);
673 btrace_free_objfile (objfile
);
675 /* First do any symbol file specific actions required when we are
676 finished with a particular symbol file. Note that if the objfile
677 is using reusable symbol information (via mmalloc) then each of
678 these routines is responsible for doing the correct thing, either
679 freeing things which are valid only during this particular gdb
680 execution, or leaving them to be reused during the next one. */
682 if (objfile
->sf
!= NULL
)
684 (*objfile
->sf
->sym_finish
) (objfile
);
687 /* Discard any data modules have associated with the objfile. The function
688 still may reference objfile->obfd. */
689 objfile_free_data (objfile
);
692 gdb_bfd_unref (objfile
->obfd
);
694 free_objfile_per_bfd_storage (objfile
->per_bfd
);
696 /* Remove it from the chain of all objfiles. */
698 unlink_objfile (objfile
);
700 if (objfile
== symfile_objfile
)
701 symfile_objfile
= NULL
;
703 /* Before the symbol table code was redone to make it easier to
704 selectively load and remove information particular to a specific
705 linkage unit, gdb used to do these things whenever the monolithic
706 symbol table was blown away. How much still needs to be done
707 is unknown, but we play it safe for now and keep each action until
708 it is shown to be no longer needed. */
710 /* Not all our callers call clear_symtab_users (objfile_purge_solibs,
711 for example), so we need to call this here. */
712 clear_pc_function_cache ();
714 /* Clear globals which might have pointed into a removed objfile.
715 FIXME: It's not clear which of these are supposed to persist
716 between expressions and which ought to be reset each time. */
717 expression_context_block
= NULL
;
718 innermost_block
= NULL
;
720 /* Check to see if the current_source_symtab belongs to this objfile,
721 and if so, call clear_current_source_symtab_and_line. */
724 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
726 if (cursal
.symtab
&& SYMTAB_OBJFILE (cursal
.symtab
) == objfile
)
727 clear_current_source_symtab_and_line ();
730 if (objfile
->global_psymbols
.list
)
731 xfree (objfile
->global_psymbols
.list
);
732 if (objfile
->static_psymbols
.list
)
733 xfree (objfile
->static_psymbols
.list
);
734 /* Free the obstacks for non-reusable objfiles. */
735 psymbol_bcache_free (objfile
->psymbol_cache
);
736 obstack_free (&objfile
->objfile_obstack
, 0);
738 /* Rebuild section map next time we need it. */
739 get_objfile_pspace_data (objfile
->pspace
)->section_map_dirty
= 1;
741 /* Free the map for static links. There's no need to free static link
742 themselves since they were allocated on the objstack. */
743 if (objfile
->static_links
!= NULL
)
744 htab_delete (objfile
->static_links
);
746 /* The last thing we do is free the objfile struct itself. */
751 do_free_objfile_cleanup (void *obj
)
753 free_objfile ((struct objfile
*) obj
);
757 make_cleanup_free_objfile (struct objfile
*obj
)
759 return make_cleanup (do_free_objfile_cleanup
, obj
);
762 /* Free all the object files at once and clean up their users. */
765 free_all_objfiles (void)
767 struct objfile
*objfile
, *temp
;
770 /* Any objfile referencewould become stale. */
771 for (so
= master_so_list (); so
; so
= so
->next
)
772 gdb_assert (so
->objfile
== NULL
);
774 ALL_OBJFILES_SAFE (objfile
, temp
)
776 free_objfile (objfile
);
778 clear_symtab_users (0);
781 /* A helper function for objfile_relocate1 that relocates a single
785 relocate_one_symbol (struct symbol
*sym
, struct objfile
*objfile
,
786 struct section_offsets
*delta
)
788 fixup_symbol_section (sym
, objfile
);
790 /* The RS6000 code from which this was taken skipped
791 any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN.
792 But I'm leaving out that test, on the theory that
793 they can't possibly pass the tests below. */
794 if ((SYMBOL_CLASS (sym
) == LOC_LABEL
795 || SYMBOL_CLASS (sym
) == LOC_STATIC
)
796 && SYMBOL_SECTION (sym
) >= 0)
798 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (delta
, SYMBOL_SECTION (sym
));
802 /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS
803 entries in new_offsets. SEPARATE_DEBUG_OBJFILE is not touched here.
804 Return non-zero iff any change happened. */
807 objfile_relocate1 (struct objfile
*objfile
,
808 const struct section_offsets
*new_offsets
)
810 struct obj_section
*s
;
811 struct section_offsets
*delta
=
812 ((struct section_offsets
*)
813 alloca (SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
)));
816 int something_changed
= 0;
818 for (i
= 0; i
< objfile
->num_sections
; ++i
)
821 ANOFFSET (new_offsets
, i
) - ANOFFSET (objfile
->section_offsets
, i
);
822 if (ANOFFSET (delta
, i
) != 0)
823 something_changed
= 1;
825 if (!something_changed
)
828 /* OK, get all the symtabs. */
830 struct compunit_symtab
*cust
;
833 ALL_OBJFILE_FILETABS (objfile
, cust
, s
)
838 /* First the line table. */
839 l
= SYMTAB_LINETABLE (s
);
842 for (i
= 0; i
< l
->nitems
; ++i
)
843 l
->item
[i
].pc
+= ANOFFSET (delta
,
844 COMPUNIT_BLOCK_LINE_SECTION
849 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
851 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (cust
);
852 int block_line_section
= COMPUNIT_BLOCK_LINE_SECTION (cust
);
854 if (BLOCKVECTOR_MAP (bv
))
855 addrmap_relocate (BLOCKVECTOR_MAP (bv
),
856 ANOFFSET (delta
, block_line_section
));
858 for (i
= 0; i
< BLOCKVECTOR_NBLOCKS (bv
); ++i
)
862 struct dict_iterator iter
;
864 b
= BLOCKVECTOR_BLOCK (bv
, i
);
865 BLOCK_START (b
) += ANOFFSET (delta
, block_line_section
);
866 BLOCK_END (b
) += ANOFFSET (delta
, block_line_section
);
868 /* We only want to iterate over the local symbols, not any
869 symbols in included symtabs. */
870 ALL_DICT_SYMBOLS (BLOCK_DICT (b
), iter
, sym
)
872 relocate_one_symbol (sym
, objfile
, delta
);
878 /* Relocate isolated symbols. */
882 for (iter
= objfile
->template_symbols
; iter
; iter
= iter
->hash_next
)
883 relocate_one_symbol (iter
, objfile
, delta
);
886 if (objfile
->psymtabs_addrmap
)
887 addrmap_relocate (objfile
->psymtabs_addrmap
,
888 ANOFFSET (delta
, SECT_OFF_TEXT (objfile
)));
891 objfile
->sf
->qf
->relocate (objfile
, new_offsets
, delta
);
896 for (i
= 0; i
< objfile
->num_sections
; ++i
)
897 (objfile
->section_offsets
)->offsets
[i
] = ANOFFSET (new_offsets
, i
);
900 /* Rebuild section map next time we need it. */
901 get_objfile_pspace_data (objfile
->pspace
)->section_map_dirty
= 1;
903 /* Update the table in exec_ops, used to read memory. */
904 ALL_OBJFILE_OSECTIONS (objfile
, s
)
906 int idx
= s
- objfile
->sections
;
908 exec_set_section_address (bfd_get_filename (objfile
->obfd
), idx
,
909 obj_section_addr (s
));
916 /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS
917 entries in new_offsets. Process also OBJFILE's SEPARATE_DEBUG_OBJFILEs.
919 The number and ordering of sections does differ between the two objfiles.
920 Only their names match. Also the file offsets will differ (objfile being
921 possibly prelinked but separate_debug_objfile is probably not prelinked) but
922 the in-memory absolute address as specified by NEW_OFFSETS must match both
926 objfile_relocate (struct objfile
*objfile
,
927 const struct section_offsets
*new_offsets
)
929 struct objfile
*debug_objfile
;
932 changed
|= objfile_relocate1 (objfile
, new_offsets
);
934 for (debug_objfile
= objfile
->separate_debug_objfile
;
936 debug_objfile
= objfile_separate_debug_iterate (objfile
, debug_objfile
))
938 struct section_addr_info
*objfile_addrs
;
939 struct cleanup
*my_cleanups
;
941 objfile_addrs
= build_section_addr_info_from_objfile (objfile
);
942 my_cleanups
= make_cleanup (xfree
, objfile_addrs
);
944 /* Here OBJFILE_ADDRS contain the correct absolute addresses, the
945 relative ones must be already created according to debug_objfile. */
947 addr_info_make_relative (objfile_addrs
, debug_objfile
->obfd
);
949 gdb_assert (debug_objfile
->num_sections
950 == gdb_bfd_count_sections (debug_objfile
->obfd
));
951 std::vector
<struct section_offsets
>
952 new_debug_offsets (SIZEOF_N_SECTION_OFFSETS (debug_objfile
->num_sections
));
953 relative_addr_info_to_section_offsets (new_debug_offsets
.data (),
954 debug_objfile
->num_sections
,
957 changed
|= objfile_relocate1 (debug_objfile
, new_debug_offsets
.data ());
959 do_cleanups (my_cleanups
);
962 /* Relocate breakpoints as necessary, after things are relocated. */
964 breakpoint_re_set ();
967 /* Rebase (add to the offsets) OBJFILE by SLIDE. SEPARATE_DEBUG_OBJFILE is
969 Return non-zero iff any change happened. */
972 objfile_rebase1 (struct objfile
*objfile
, CORE_ADDR slide
)
974 struct section_offsets
*new_offsets
=
975 ((struct section_offsets
*)
976 alloca (SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
)));
979 for (i
= 0; i
< objfile
->num_sections
; ++i
)
980 new_offsets
->offsets
[i
] = slide
;
982 return objfile_relocate1 (objfile
, new_offsets
);
985 /* Rebase (add to the offsets) OBJFILE by SLIDE. Process also OBJFILE's
986 SEPARATE_DEBUG_OBJFILEs. */
989 objfile_rebase (struct objfile
*objfile
, CORE_ADDR slide
)
991 struct objfile
*debug_objfile
;
994 changed
|= objfile_rebase1 (objfile
, slide
);
996 for (debug_objfile
= objfile
->separate_debug_objfile
;
998 debug_objfile
= objfile_separate_debug_iterate (objfile
, debug_objfile
))
999 changed
|= objfile_rebase1 (debug_objfile
, slide
);
1001 /* Relocate breakpoints as necessary, after things are relocated. */
1003 breakpoint_re_set ();
1006 /* Return non-zero if OBJFILE has partial symbols. */
1009 objfile_has_partial_symbols (struct objfile
*objfile
)
1014 /* If we have not read psymbols, but we have a function capable of reading
1015 them, then that is an indication that they are in fact available. Without
1016 this function the symbols may have been already read in but they also may
1017 not be present in this objfile. */
1018 if ((objfile
->flags
& OBJF_PSYMTABS_READ
) == 0
1019 && objfile
->sf
->sym_read_psymbols
!= NULL
)
1022 return objfile
->sf
->qf
->has_symbols (objfile
);
1025 /* Return non-zero if OBJFILE has full symbols. */
1028 objfile_has_full_symbols (struct objfile
*objfile
)
1030 return objfile
->compunit_symtabs
!= NULL
;
1033 /* Return non-zero if OBJFILE has full or partial symbols, either directly
1034 or through a separate debug file. */
1037 objfile_has_symbols (struct objfile
*objfile
)
1041 for (o
= objfile
; o
; o
= objfile_separate_debug_iterate (objfile
, o
))
1042 if (objfile_has_partial_symbols (o
) || objfile_has_full_symbols (o
))
1048 /* Many places in gdb want to test just to see if we have any partial
1049 symbols available. This function returns zero if none are currently
1050 available, nonzero otherwise. */
1053 have_partial_symbols (void)
1055 struct objfile
*ofp
;
1059 if (objfile_has_partial_symbols (ofp
))
1065 /* Many places in gdb want to test just to see if we have any full
1066 symbols available. This function returns zero if none are currently
1067 available, nonzero otherwise. */
1070 have_full_symbols (void)
1072 struct objfile
*ofp
;
1076 if (objfile_has_full_symbols (ofp
))
1083 /* This operations deletes all objfile entries that represent solibs that
1084 weren't explicitly loaded by the user, via e.g., the add-symbol-file
1088 objfile_purge_solibs (void)
1090 struct objfile
*objf
;
1091 struct objfile
*temp
;
1093 ALL_OBJFILES_SAFE (objf
, temp
)
1095 /* We assume that the solib package has been purged already, or will
1098 if (!(objf
->flags
& OBJF_USERLOADED
) && (objf
->flags
& OBJF_SHARED
))
1099 free_objfile (objf
);
1104 /* Many places in gdb want to test just to see if we have any minimal
1105 symbols available. This function returns zero if none are currently
1106 available, nonzero otherwise. */
1109 have_minimal_symbols (void)
1111 struct objfile
*ofp
;
1115 if (ofp
->per_bfd
->minimal_symbol_count
> 0)
1123 /* Qsort comparison function. */
1126 qsort_cmp (const void *a
, const void *b
)
1128 const struct obj_section
*sect1
= *(const struct obj_section
**) a
;
1129 const struct obj_section
*sect2
= *(const struct obj_section
**) b
;
1130 const CORE_ADDR sect1_addr
= obj_section_addr (sect1
);
1131 const CORE_ADDR sect2_addr
= obj_section_addr (sect2
);
1133 if (sect1_addr
< sect2_addr
)
1135 else if (sect1_addr
> sect2_addr
)
1139 /* Sections are at the same address. This could happen if
1140 A) we have an objfile and a separate debuginfo.
1141 B) we are confused, and have added sections without proper relocation,
1142 or something like that. */
1144 const struct objfile
*const objfile1
= sect1
->objfile
;
1145 const struct objfile
*const objfile2
= sect2
->objfile
;
1147 if (objfile1
->separate_debug_objfile
== objfile2
1148 || objfile2
->separate_debug_objfile
== objfile1
)
1150 /* Case A. The ordering doesn't matter: separate debuginfo files
1151 will be filtered out later. */
1156 /* Case B. Maintain stable sort order, so bugs in GDB are easier to
1157 triage. This section could be slow (since we iterate over all
1158 objfiles in each call to qsort_cmp), but this shouldn't happen
1159 very often (GDB is already in a confused state; one hopes this
1160 doesn't happen at all). If you discover that significant time is
1161 spent in the loops below, do 'set complaints 100' and examine the
1162 resulting complaints. */
1164 if (objfile1
== objfile2
)
1166 /* Both sections came from the same objfile. We are really confused.
1167 Sort on sequence order of sections within the objfile. */
1169 const struct obj_section
*osect
;
1171 ALL_OBJFILE_OSECTIONS (objfile1
, osect
)
1174 else if (osect
== sect2
)
1177 /* We should have found one of the sections before getting here. */
1178 gdb_assert_not_reached ("section not found");
1182 /* Sort on sequence number of the objfile in the chain. */
1184 const struct objfile
*objfile
;
1186 ALL_OBJFILES (objfile
)
1187 if (objfile
== objfile1
)
1189 else if (objfile
== objfile2
)
1192 /* We should have found one of the objfiles before getting here. */
1193 gdb_assert_not_reached ("objfile not found");
1198 gdb_assert_not_reached ("unexpected code path");
1202 /* Select "better" obj_section to keep. We prefer the one that came from
1203 the real object, rather than the one from separate debuginfo.
1204 Most of the time the two sections are exactly identical, but with
1205 prelinking the .rel.dyn section in the real object may have different
1208 static struct obj_section
*
1209 preferred_obj_section (struct obj_section
*a
, struct obj_section
*b
)
1211 gdb_assert (obj_section_addr (a
) == obj_section_addr (b
));
1212 gdb_assert ((a
->objfile
->separate_debug_objfile
== b
->objfile
)
1213 || (b
->objfile
->separate_debug_objfile
== a
->objfile
));
1214 gdb_assert ((a
->objfile
->separate_debug_objfile_backlink
== b
->objfile
)
1215 || (b
->objfile
->separate_debug_objfile_backlink
== a
->objfile
));
1217 if (a
->objfile
->separate_debug_objfile
!= NULL
)
1222 /* Return 1 if SECTION should be inserted into the section map.
1223 We want to insert only non-overlay and non-TLS section. */
1226 insert_section_p (const struct bfd
*abfd
,
1227 const struct bfd_section
*section
)
1229 const bfd_vma lma
= bfd_section_lma (abfd
, section
);
1231 if (overlay_debugging
&& lma
!= 0 && lma
!= bfd_section_vma (abfd
, section
)
1232 && (bfd_get_file_flags (abfd
) & BFD_IN_MEMORY
) == 0)
1233 /* This is an overlay section. IN_MEMORY check is needed to avoid
1234 discarding sections from the "system supplied DSO" (aka vdso)
1235 on some Linux systems (e.g. Fedora 11). */
1237 if ((bfd_get_section_flags (abfd
, section
) & SEC_THREAD_LOCAL
) != 0)
1238 /* This is a TLS section. */
1244 /* Filter out overlapping sections where one section came from the real
1245 objfile, and the other from a separate debuginfo file.
1246 Return the size of table after redundant sections have been eliminated. */
1249 filter_debuginfo_sections (struct obj_section
**map
, int map_size
)
1253 for (i
= 0, j
= 0; i
< map_size
- 1; i
++)
1255 struct obj_section
*const sect1
= map
[i
];
1256 struct obj_section
*const sect2
= map
[i
+ 1];
1257 const struct objfile
*const objfile1
= sect1
->objfile
;
1258 const struct objfile
*const objfile2
= sect2
->objfile
;
1259 const CORE_ADDR sect1_addr
= obj_section_addr (sect1
);
1260 const CORE_ADDR sect2_addr
= obj_section_addr (sect2
);
1262 if (sect1_addr
== sect2_addr
1263 && (objfile1
->separate_debug_objfile
== objfile2
1264 || objfile2
->separate_debug_objfile
== objfile1
))
1266 map
[j
++] = preferred_obj_section (sect1
, sect2
);
1275 gdb_assert (i
== map_size
- 1);
1279 /* The map should not have shrunk to less than half the original size. */
1280 gdb_assert (map_size
/ 2 <= j
);
1285 /* Filter out overlapping sections, issuing a warning if any are found.
1286 Overlapping sections could really be overlay sections which we didn't
1287 classify as such in insert_section_p, or we could be dealing with a
1291 filter_overlapping_sections (struct obj_section
**map
, int map_size
)
1295 for (i
= 0, j
= 0; i
< map_size
- 1; )
1300 for (k
= i
+ 1; k
< map_size
; k
++)
1302 struct obj_section
*const sect1
= map
[i
];
1303 struct obj_section
*const sect2
= map
[k
];
1304 const CORE_ADDR sect1_addr
= obj_section_addr (sect1
);
1305 const CORE_ADDR sect2_addr
= obj_section_addr (sect2
);
1306 const CORE_ADDR sect1_endaddr
= obj_section_endaddr (sect1
);
1308 gdb_assert (sect1_addr
<= sect2_addr
);
1310 if (sect1_endaddr
<= sect2_addr
)
1314 /* We have an overlap. Report it. */
1316 struct objfile
*const objf1
= sect1
->objfile
;
1317 struct objfile
*const objf2
= sect2
->objfile
;
1319 const struct bfd_section
*const bfds1
= sect1
->the_bfd_section
;
1320 const struct bfd_section
*const bfds2
= sect2
->the_bfd_section
;
1322 const CORE_ADDR sect2_endaddr
= obj_section_endaddr (sect2
);
1324 struct gdbarch
*const gdbarch
= get_objfile_arch (objf1
);
1326 complaint (&symfile_complaints
,
1327 _("unexpected overlap between:\n"
1328 " (A) section `%s' from `%s' [%s, %s)\n"
1329 " (B) section `%s' from `%s' [%s, %s).\n"
1330 "Will ignore section B"),
1331 bfd_section_name (abfd1
, bfds1
), objfile_name (objf1
),
1332 paddress (gdbarch
, sect1_addr
),
1333 paddress (gdbarch
, sect1_endaddr
),
1334 bfd_section_name (abfd2
, bfds2
), objfile_name (objf2
),
1335 paddress (gdbarch
, sect2_addr
),
1336 paddress (gdbarch
, sect2_endaddr
));
1344 gdb_assert (i
== map_size
- 1);
1352 /* Update PMAP, PMAP_SIZE with sections from all objfiles, excluding any
1353 TLS, overlay and overlapping sections. */
1356 update_section_map (struct program_space
*pspace
,
1357 struct obj_section
***pmap
, int *pmap_size
)
1359 struct objfile_pspace_info
*pspace_info
;
1360 int alloc_size
, map_size
, i
;
1361 struct obj_section
*s
, **map
;
1362 struct objfile
*objfile
;
1364 pspace_info
= get_objfile_pspace_data (pspace
);
1365 gdb_assert (pspace_info
->section_map_dirty
!= 0
1366 || pspace_info
->new_objfiles_available
!= 0);
1372 ALL_PSPACE_OBJFILES (pspace
, objfile
)
1373 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1374 if (insert_section_p (objfile
->obfd
, s
->the_bfd_section
))
1377 /* This happens on detach/attach (e.g. in gdb.base/attach.exp). */
1378 if (alloc_size
== 0)
1385 map
= XNEWVEC (struct obj_section
*, alloc_size
);
1388 ALL_PSPACE_OBJFILES (pspace
, objfile
)
1389 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1390 if (insert_section_p (objfile
->obfd
, s
->the_bfd_section
))
1393 qsort (map
, alloc_size
, sizeof (*map
), qsort_cmp
);
1394 map_size
= filter_debuginfo_sections(map
, alloc_size
);
1395 map_size
= filter_overlapping_sections(map
, map_size
);
1397 if (map_size
< alloc_size
)
1398 /* Some sections were eliminated. Trim excess space. */
1399 map
= XRESIZEVEC (struct obj_section
*, map
, map_size
);
1401 gdb_assert (alloc_size
== map_size
);
1404 *pmap_size
= map_size
;
1407 /* Bsearch comparison function. */
1410 bsearch_cmp (const void *key
, const void *elt
)
1412 const CORE_ADDR pc
= *(CORE_ADDR
*) key
;
1413 const struct obj_section
*section
= *(const struct obj_section
**) elt
;
1415 if (pc
< obj_section_addr (section
))
1417 if (pc
< obj_section_endaddr (section
))
1422 /* Returns a section whose range includes PC or NULL if none found. */
1424 struct obj_section
*
1425 find_pc_section (CORE_ADDR pc
)
1427 struct objfile_pspace_info
*pspace_info
;
1428 struct obj_section
*s
, **sp
;
1430 /* Check for mapped overlay section first. */
1431 s
= find_pc_mapped_section (pc
);
1435 pspace_info
= get_objfile_pspace_data (current_program_space
);
1436 if (pspace_info
->section_map_dirty
1437 || (pspace_info
->new_objfiles_available
1438 && !pspace_info
->inhibit_updates
))
1440 update_section_map (current_program_space
,
1441 &pspace_info
->sections
,
1442 &pspace_info
->num_sections
);
1444 /* Don't need updates to section map until objfiles are added,
1445 removed or relocated. */
1446 pspace_info
->new_objfiles_available
= 0;
1447 pspace_info
->section_map_dirty
= 0;
1450 /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to
1451 bsearch be non-NULL. */
1452 if (pspace_info
->sections
== NULL
)
1454 gdb_assert (pspace_info
->num_sections
== 0);
1458 sp
= (struct obj_section
**) bsearch (&pc
,
1459 pspace_info
->sections
,
1460 pspace_info
->num_sections
,
1461 sizeof (*pspace_info
->sections
),
1469 /* Return non-zero if PC is in a section called NAME. */
1472 pc_in_section (CORE_ADDR pc
, char *name
)
1474 struct obj_section
*s
;
1477 s
= find_pc_section (pc
);
1480 && s
->the_bfd_section
->name
!= NULL
1481 && strcmp (s
->the_bfd_section
->name
, name
) == 0);
1486 /* Set section_map_dirty so section map will be rebuilt next time it
1487 is used. Called by reread_symbols. */
1490 objfiles_changed (void)
1492 /* Rebuild section map next time we need it. */
1493 get_objfile_pspace_data (current_program_space
)->section_map_dirty
= 1;
1496 /* See comments in objfiles.h. */
1499 inhibit_section_map_updates (struct program_space
*pspace
)
1501 get_objfile_pspace_data (pspace
)->inhibit_updates
= 1;
1504 /* See comments in objfiles.h. */
1507 resume_section_map_updates (struct program_space
*pspace
)
1509 get_objfile_pspace_data (pspace
)->inhibit_updates
= 0;
1512 /* See comments in objfiles.h. */
1515 resume_section_map_updates_cleanup (void *arg
)
1517 resume_section_map_updates ((struct program_space
*) arg
);
1520 /* Return 1 if ADDR maps into one of the sections of OBJFILE and 0
1524 is_addr_in_objfile (CORE_ADDR addr
, const struct objfile
*objfile
)
1526 struct obj_section
*osect
;
1528 if (objfile
== NULL
)
1531 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
1533 if (section_is_overlay (osect
) && !section_is_mapped (osect
))
1536 if (obj_section_addr (osect
) <= addr
1537 && addr
< obj_section_endaddr (osect
))
1544 shared_objfile_contains_address_p (struct program_space
*pspace
,
1547 struct objfile
*objfile
;
1549 ALL_PSPACE_OBJFILES (pspace
, objfile
)
1551 if ((objfile
->flags
& OBJF_SHARED
) != 0
1552 && is_addr_in_objfile (address
, objfile
))
1559 /* The default implementation for the "iterate_over_objfiles_in_search_order"
1560 gdbarch method. It is equivalent to use the ALL_OBJFILES macro,
1561 searching the objfiles in the order they are stored internally,
1562 ignoring CURRENT_OBJFILE.
1564 On most platorms, it should be close enough to doing the best
1565 we can without some knowledge specific to the architecture. */
1568 default_iterate_over_objfiles_in_search_order
1569 (struct gdbarch
*gdbarch
,
1570 iterate_over_objfiles_in_search_order_cb_ftype
*cb
,
1571 void *cb_data
, struct objfile
*current_objfile
)
1574 struct objfile
*objfile
;
1576 ALL_OBJFILES (objfile
)
1578 stop
= cb (objfile
, cb_data
);
1584 /* See objfiles.h. */
1587 objfile_name (const struct objfile
*objfile
)
1589 if (objfile
->obfd
!= NULL
)
1590 return bfd_get_filename (objfile
->obfd
);
1592 return objfile
->original_name
;
1595 /* See objfiles.h. */
1598 objfile_filename (const struct objfile
*objfile
)
1600 if (objfile
->obfd
!= NULL
)
1601 return bfd_get_filename (objfile
->obfd
);
1606 /* See objfiles.h. */
1609 objfile_debug_name (const struct objfile
*objfile
)
1611 return lbasename (objfile
->original_name
);
1614 /* See objfiles.h. */
1617 objfile_flavour_name (struct objfile
*objfile
)
1619 if (objfile
->obfd
!= NULL
)
1620 return bfd_flavour_name (bfd_get_flavour (objfile
->obfd
));
1624 /* Provide a prototype to silence -Wmissing-prototypes. */
1625 extern initialize_file_ftype _initialize_objfiles
;
1628 _initialize_objfiles (void)
1630 objfiles_pspace_data
1631 = register_program_space_data_with_cleanup (NULL
,
1632 objfiles_pspace_data_cleanup
);
1634 objfiles_bfd_data
= register_bfd_data_with_cleanup (NULL
,
1635 objfile_bfd_data_free
);