1 /* Handle shared libraries for GDB, the GNU Debugger.
3 Copyright (C) 1990-2015 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include <sys/types.h>
32 #include "gdb_regex.h"
37 #include "completer.h"
38 #include "filenames.h" /* for DOSish file names */
42 #include "readline/readline.h"
46 #include "filesystem.h"
48 #include "filestuff.h"
50 /* Architecture-specific operations. */
52 /* Per-architecture data key. */
53 static struct gdbarch_data
*solib_data
;
56 solib_init (struct obstack
*obstack
)
58 struct target_so_ops
**ops
;
60 ops
= OBSTACK_ZALLOC (obstack
, struct target_so_ops
*);
61 *ops
= current_target_so_ops
;
65 static const struct target_so_ops
*
66 solib_ops (struct gdbarch
*gdbarch
)
68 const struct target_so_ops
**ops
= gdbarch_data (gdbarch
, solib_data
);
73 /* Set the solib operations for GDBARCH to NEW_OPS. */
76 set_solib_ops (struct gdbarch
*gdbarch
, const struct target_so_ops
*new_ops
)
78 const struct target_so_ops
**ops
= gdbarch_data (gdbarch
, solib_data
);
84 /* external data declarations */
86 /* FIXME: gdbarch needs to control this variable, or else every
87 configuration needs to call set_solib_ops. */
88 struct target_so_ops
*current_target_so_ops
;
90 /* List of known shared objects */
91 #define so_list_head current_program_space->so_list
93 /* Local function prototypes */
95 /* If non-empty, this is a search path for loading non-absolute shared library
96 symbol files. This takes precedence over the environment variables PATH
97 and LD_LIBRARY_PATH. */
98 static char *solib_search_path
= NULL
;
100 show_solib_search_path (struct ui_file
*file
, int from_tty
,
101 struct cmd_list_element
*c
, const char *value
)
103 fprintf_filtered (file
, _("The search path for loading non-absolute "
104 "shared library symbol files is %s.\n"),
108 /* Same as HAVE_DOS_BASED_FILE_SYSTEM, but useable as an rvalue. */
109 #if (HAVE_DOS_BASED_FILE_SYSTEM)
110 # define DOS_BASED_FILE_SYSTEM 1
112 # define DOS_BASED_FILE_SYSTEM 0
115 /* Return the full pathname of a binary file (the main executable
116 or a shared library file), or NULL if not found. The returned
117 pathname is malloc'ed and must be freed by the caller. If FD
118 is non-NULL, *FD is set to either -1 or an open file handle for
121 Global variable GDB_SYSROOT is used as a prefix directory
122 to search for binary files if they have an absolute path.
123 If GDB_SYSROOT starts with "target:" and target filesystem
124 is the local filesystem then the "target:" prefix will be
125 stripped before the search starts. This ensures that the
126 same search algorithm is used for local files regardless of
127 whether a "target:" prefix was used.
129 Global variable SOLIB_SEARCH_PATH is used as a prefix directory
130 (or set of directories, as in LD_LIBRARY_PATH) to search for all
131 shared libraries if not found in either the sysroot (if set) or
132 the local filesystem. SOLIB_SEARCH_PATH is not used when searching
133 for the main executable.
136 * If a sysroot is set and path is absolute:
137 * Search for sysroot/path.
139 * Look for it literally (unmodified).
140 * If IS_SOLIB is non-zero:
141 * Look in SOLIB_SEARCH_PATH.
142 * If available, use target defined search function.
143 * If NO sysroot is set, perform the following two searches:
144 * Look in inferior's $PATH.
145 * If IS_SOLIB is non-zero:
146 * Look in inferior's $LD_LIBRARY_PATH.
148 * The last check avoids doing this search when targetting remote
149 * machines since a sysroot will almost always be set.
153 solib_find_1 (char *in_pathname
, int *fd
, int is_solib
)
155 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
157 char *temp_pathname
= NULL
;
158 const char *fskind
= effective_target_file_system_kind ();
159 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
160 char *sysroot
= gdb_sysroot
;
161 int prefix_len
, orig_prefix_len
;
163 /* If the absolute prefix starts with "target:" but the filesystem
164 accessed by the target_fileio_* methods is the local filesystem
165 then we strip the "target:" prefix now and work with the local
166 filesystem. This ensures that the same search algorithm is used
167 for all local files regardless of whether a "target:" prefix was
169 if (is_target_filename (sysroot
) && target_filesystem_is_local ())
170 sysroot
+= strlen (TARGET_SYSROOT_PREFIX
);
172 /* Strip any trailing slashes from the absolute prefix. */
173 prefix_len
= orig_prefix_len
= strlen (sysroot
);
175 while (prefix_len
> 0 && IS_DIR_SEPARATOR (sysroot
[prefix_len
- 1]))
180 else if (prefix_len
!= orig_prefix_len
)
182 sysroot
= savestring (sysroot
, prefix_len
);
183 make_cleanup (xfree
, sysroot
);
186 /* If we're on a non-DOS-based system, backslashes won't be
187 understood as directory separator, so, convert them to forward
188 slashes, iff we're supposed to handle DOS-based file system
189 semantics for target paths. */
190 if (!DOS_BASED_FILE_SYSTEM
&& fskind
== file_system_kind_dos_based
)
194 /* Avoid clobbering our input. */
195 p
= alloca (strlen (in_pathname
) + 1);
196 strcpy (p
, in_pathname
);
206 /* Note, we're interested in IS_TARGET_ABSOLUTE_PATH, not
207 IS_ABSOLUTE_PATH. The latter is for host paths only, while
208 IN_PATHNAME is a target path. For example, if we're supposed to
209 be handling DOS-like semantics we want to consider a
210 'c:/foo/bar.dll' path as an absolute path, even on a Unix box.
211 With such a path, before giving up on the sysroot, we'll try:
213 1st attempt, c:/foo/bar.dll ==> /sysroot/c:/foo/bar.dll
214 2nd attempt, c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll
215 3rd attempt, c:/foo/bar.dll ==> /sysroot/foo/bar.dll
218 if (!IS_TARGET_ABSOLUTE_PATH (fskind
, in_pathname
) || sysroot
== NULL
)
219 temp_pathname
= xstrdup (in_pathname
);
222 int need_dir_separator
;
224 /* Concatenate the sysroot and the target reported filename. We
225 may need to glue them with a directory separator. Cases to
228 | sysroot | separator | in_pathname |
229 |-----------------+-----------+----------------|
230 | /some/dir | / | c:/foo/bar.dll |
231 | /some/dir | | /foo/bar.dll |
232 | target: | | c:/foo/bar.dll |
233 | target: | | /foo/bar.dll |
234 | target:some/dir | / | c:/foo/bar.dll |
235 | target:some/dir | | /foo/bar.dll |
237 IOW, we don't need to add a separator if IN_PATHNAME already
238 has one, or when the the sysroot is exactly "target:".
239 There's no need to check for drive spec explicitly, as we only
240 get here if IN_PATHNAME is considered an absolute path. */
241 need_dir_separator
= !(IS_DIR_SEPARATOR (in_pathname
[0])
242 || strcmp (TARGET_SYSROOT_PREFIX
, sysroot
) == 0);
244 /* Cat the prefixed pathname together. */
245 temp_pathname
= concat (sysroot
,
246 need_dir_separator
? SLASH_STRING
: "",
247 in_pathname
, (char *) NULL
);
250 /* Handle files to be accessed via the target. */
251 if (is_target_filename (temp_pathname
))
255 do_cleanups (old_chain
);
256 return temp_pathname
;
259 /* Now see if we can open it. */
260 found_file
= gdb_open_cloexec (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
262 xfree (temp_pathname
);
264 /* If the search in gdb_sysroot failed, and the path name has a
265 drive spec (e.g, c:/foo), try stripping ':' from the drive spec,
266 and retrying in the sysroot:
267 c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll. */
271 && HAS_TARGET_DRIVE_SPEC (fskind
, in_pathname
))
273 int need_dir_separator
= !IS_DIR_SEPARATOR (in_pathname
[2]);
274 char *drive
= savestring (in_pathname
, 1);
276 temp_pathname
= concat (sysroot
,
279 need_dir_separator
? SLASH_STRING
: "",
280 in_pathname
+ 2, (char *) NULL
);
283 found_file
= gdb_open_cloexec (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
286 xfree (temp_pathname
);
288 /* If the search in gdb_sysroot still failed, try fully
289 stripping the drive spec, and trying once more in the
290 sysroot before giving up.
292 c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */
294 temp_pathname
= concat (sysroot
,
295 need_dir_separator
? SLASH_STRING
: "",
296 in_pathname
+ 2, (char *) NULL
);
298 found_file
= gdb_open_cloexec (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
300 xfree (temp_pathname
);
304 do_cleanups (old_chain
);
306 /* We try to find the library in various ways. After each attempt,
307 either found_file >= 0 and temp_pathname is a malloc'd string, or
308 found_file < 0 and temp_pathname does not point to storage that
309 needs to be freed. */
312 temp_pathname
= NULL
;
314 /* If the search in gdb_sysroot failed, and the path name is
315 absolute at this point, make it relative. (openp will try and open the
316 file according to its absolute path otherwise, which is not what we want.)
317 Affects subsequent searches for this solib. */
318 if (found_file
< 0 && IS_TARGET_ABSOLUTE_PATH (fskind
, in_pathname
))
320 /* First, get rid of any drive letters etc. */
321 while (!IS_TARGET_DIR_SEPARATOR (fskind
, *in_pathname
))
324 /* Next, get rid of all leading dir separators. */
325 while (IS_TARGET_DIR_SEPARATOR (fskind
, *in_pathname
))
329 /* If not found, and we're looking for a solib, search the
330 solib_search_path (if any). */
331 if (is_solib
&& found_file
< 0 && solib_search_path
!= NULL
)
332 found_file
= openp (solib_search_path
,
333 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
334 in_pathname
, O_RDONLY
| O_BINARY
, &temp_pathname
);
336 /* If not found, and we're looking for a solib, next search the
337 solib_search_path (if any) for the basename only (ignoring the
338 path). This is to allow reading solibs from a path that differs
339 from the opened path. */
340 if (is_solib
&& found_file
< 0 && solib_search_path
!= NULL
)
341 found_file
= openp (solib_search_path
,
342 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
343 target_lbasename (fskind
, in_pathname
),
344 O_RDONLY
| O_BINARY
, &temp_pathname
);
346 /* If not found, and we're looking for a solib, try to use target
347 supplied solib search method. */
348 if (is_solib
&& found_file
< 0 && ops
->find_and_open_solib
)
349 found_file
= ops
->find_and_open_solib (in_pathname
, O_RDONLY
| O_BINARY
,
352 /* If not found, next search the inferior's $PATH environment variable. */
353 if (found_file
< 0 && sysroot
== NULL
)
354 found_file
= openp (get_in_environ (current_inferior ()->environment
,
356 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
, in_pathname
,
357 O_RDONLY
| O_BINARY
, &temp_pathname
);
359 /* If not found, and we're looking for a solib, next search the
360 inferior's $LD_LIBRARY_PATH environment variable. */
361 if (is_solib
&& found_file
< 0 && sysroot
== NULL
)
362 found_file
= openp (get_in_environ (current_inferior ()->environment
,
364 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
, in_pathname
,
365 O_RDONLY
| O_BINARY
, &temp_pathname
);
375 return temp_pathname
;
378 /* Return the full pathname of the main executable, or NULL if not
379 found. The returned pathname is malloc'ed and must be freed by
380 the caller. If FD is non-NULL, *FD is set to either -1 or an open
381 file handle for the main executable.
383 The search algorithm used is described in solib_find_1's comment
387 exec_file_find (char *in_pathname
, int *fd
)
389 char *result
= solib_find_1 (in_pathname
, fd
, 0);
393 const char *fskind
= effective_target_file_system_kind ();
395 if (fskind
== file_system_kind_dos_based
)
399 new_pathname
= alloca (strlen (in_pathname
) + 5);
400 strcpy (new_pathname
, in_pathname
);
401 strcat (new_pathname
, ".exe");
403 result
= solib_find_1 (new_pathname
, fd
, 0);
410 /* Return the full pathname of a shared library file, or NULL if not
411 found. The returned pathname is malloc'ed and must be freed by
412 the caller. If FD is non-NULL, *FD is set to either -1 or an open
413 file handle for the shared library.
415 The search algorithm used is described in solib_find_1's comment
419 solib_find (char *in_pathname
, int *fd
)
421 const char *solib_symbols_extension
422 = gdbarch_solib_symbols_extension (target_gdbarch ());
424 /* If solib_symbols_extension is set, replace the file's
426 if (solib_symbols_extension
!= NULL
)
428 char *p
= in_pathname
+ strlen (in_pathname
);
430 while (p
> in_pathname
&& *p
!= '.')
437 new_pathname
= alloca (p
- in_pathname
+ 1
438 + strlen (solib_symbols_extension
) + 1);
439 memcpy (new_pathname
, in_pathname
, p
- in_pathname
+ 1);
440 strcpy (new_pathname
+ (p
- in_pathname
) + 1,
441 solib_symbols_extension
);
443 in_pathname
= new_pathname
;
447 return solib_find_1 (in_pathname
, fd
, 1);
450 /* Open and return a BFD for the shared library PATHNAME. If FD is not -1,
451 it is used as file handle to open the file. Throws an error if the file
452 could not be opened. Handles both local and remote file access.
454 PATHNAME must be malloc'ed by the caller. It will be freed by this
455 function. If unsuccessful, the FD will be closed (unless FD was
459 solib_bfd_fopen (char *pathname
, int fd
)
461 bfd
*abfd
= gdb_bfd_open (pathname
, gnutarget
, fd
);
463 if (abfd
!= NULL
&& !gdb_bfd_has_target_filename (abfd
))
464 bfd_set_cacheable (abfd
, 1);
468 make_cleanup (xfree
, pathname
);
469 error (_("Could not open `%s' as an executable file: %s"),
470 pathname
, bfd_errmsg (bfd_get_error ()));
478 /* Find shared library PATHNAME and open a BFD for it. */
481 solib_bfd_open (char *pathname
)
483 char *found_pathname
;
486 const struct bfd_arch_info
*b
;
488 /* Search for shared library file. */
489 found_pathname
= solib_find (pathname
, &found_file
);
490 if (found_pathname
== NULL
)
492 /* Return failure if the file could not be found, so that we can
493 accumulate messages about missing libraries. */
497 perror_with_name (pathname
);
500 /* Open bfd for shared library. */
501 abfd
= solib_bfd_fopen (found_pathname
, found_file
);
503 /* Check bfd format. */
504 if (!bfd_check_format (abfd
, bfd_object
))
506 make_cleanup_bfd_unref (abfd
);
507 error (_("`%s': not in executable format: %s"),
508 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
511 /* Check bfd arch. */
512 b
= gdbarch_bfd_arch_info (target_gdbarch ());
513 if (!b
->compatible (b
, bfd_get_arch_info (abfd
)))
514 warning (_("`%s': Shared library architecture %s is not compatible "
515 "with target architecture %s."), bfd_get_filename (abfd
),
516 bfd_get_arch_info (abfd
)->printable_name
, b
->printable_name
);
521 /* Boolean for command 'set validate-build-id'. */
522 static int validate_build_id
= 1;
524 /* Implement 'show validate-build-id'. */
527 show_validate_build_id (struct ui_file
*file
, int from_tty
,
528 struct cmd_list_element
*c
, const char *value
)
530 fprintf_filtered (file
, _("Validation a build-id matches to load a shared "
535 /* Given a pointer to one of the shared objects in our list of mapped
536 objects, use the recorded name to open a bfd descriptor for the
537 object, build a section table, relocate all the section addresses
538 by the base address at which the shared object was mapped, and then
539 add the sections to the target's section table.
541 FIXME: In most (all?) cases the shared object file name recorded in
542 the dynamic linkage tables will be a fully qualified pathname. For
543 cases where it isn't, do we really mimic the systems search
544 mechanism correctly in the below code (particularly the tilde
545 expansion stuff?). */
548 solib_map_sections (struct so_list
*so
)
550 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
551 char *filename
, *validate_error
;
552 struct target_section
*p
;
553 struct cleanup
*old_chain
;
556 filename
= tilde_expand (so
->so_name
);
557 old_chain
= make_cleanup (xfree
, filename
);
558 abfd
= ops
->bfd_open (filename
);
559 do_cleanups (old_chain
);
564 /* Leave bfd open, core_xfer_memory and "info files" need it. */
567 gdb_assert (ops
->validate
!= NULL
);
569 validate_error
= ops
->validate (so
);
570 if (validate_error
!= NULL
)
572 if (validate_build_id
)
574 warning (_("Shared object \"%s\" could not be validated (%s) and "
576 "or use 'set validate-build-id off'."),
577 so
->so_name
, validate_error
);
578 xfree (validate_error
);
579 gdb_bfd_unref (so
->abfd
);
583 warning (_("Shared object \"%s\" could not be validated (%s) "
584 "but it is being loaded due to "
585 "'set validate-build-id off'."),
586 so
->so_name
, validate_error
);
587 xfree (validate_error
);
590 /* Copy the full path name into so_name, allowing symbol_file_add
591 to find it later. This also affects the =library-loaded GDB/MI
592 event, and in particular the part of that notification providing
593 the library's host-side path. If we let the target dictate
594 that objfile's path, and the target is different from the host,
595 GDB/MI will not provide the correct host-side path. */
596 if (strlen (bfd_get_filename (abfd
)) >= SO_NAME_MAX_PATH_SIZE
)
597 error (_("Shared library file name is too long."));
598 strcpy (so
->so_name
, bfd_get_filename (abfd
));
600 if (build_section_table (abfd
, &so
->sections
, &so
->sections_end
))
602 error (_("Can't find the file sections in `%s': %s"),
603 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
606 for (p
= so
->sections
; p
< so
->sections_end
; p
++)
608 /* Relocate the section binding addresses as recorded in the shared
609 object's file by the base address to which the object was actually
611 ops
->relocate_section_addresses (so
, p
);
613 /* If the target didn't provide information about the address
614 range of the shared object, assume we want the location of
615 the .text section. */
616 if (so
->addr_low
== 0 && so
->addr_high
== 0
617 && strcmp (p
->the_bfd_section
->name
, ".text") == 0)
619 so
->addr_low
= p
->addr
;
620 so
->addr_high
= p
->endaddr
;
624 /* Add the shared object's sections to the current set of file
625 section tables. Do this immediately after mapping the object so
626 that later nodes in the list can query this object, as is needed
628 add_target_sections (so
, so
->sections
, so
->sections_end
);
633 /* Free symbol-file related contents of SO and reset for possible reloading
634 of SO. If we have opened a BFD for SO, close it. If we have placed SO's
635 sections in some target's section table, the caller is responsible for
638 This function doesn't mess with objfiles at all. If there is an
639 objfile associated with SO that needs to be removed, the caller is
640 responsible for taking care of that. */
643 clear_so (struct so_list
*so
)
645 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
649 xfree (so
->sections
);
650 so
->sections
= so
->sections_end
= NULL
;
653 gdb_bfd_unref (so
->abfd
);
656 /* Our caller closed the objfile, possibly via objfile_purge_solibs. */
657 so
->symbols_loaded
= 0;
660 so
->addr_low
= so
->addr_high
= 0;
662 /* Restore the target-supplied file name. SO_NAME may be the path
663 of the symbol file. */
664 strcpy (so
->so_name
, so
->so_original_name
);
666 xfree (so
->build_id
);
669 /* Do the same for target-specific data. */
670 if (ops
->clear_so
!= NULL
)
674 /* Free the storage associated with the `struct so_list' object SO.
675 If we have opened a BFD for SO, close it.
677 The caller is responsible for removing SO from whatever list it is
678 a member of. If we have placed SO's sections in some target's
679 section table, the caller is responsible for removing them.
681 This function doesn't mess with objfiles at all. If there is an
682 objfile associated with SO that needs to be removed, the caller is
683 responsible for taking care of that. */
686 free_so (struct so_list
*so
)
688 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
697 /* Return address of first so_list entry in master shared object list. */
699 master_so_list (void)
704 /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS,
705 be chatty about it. Return non-zero if any symbols were actually
709 solib_read_symbols (struct so_list
*so
, int flags
)
711 if (so
->symbols_loaded
)
713 /* If needed, we've already warned in our caller. */
715 else if (so
->abfd
== NULL
)
717 /* We've already warned about this library, when trying to open
723 flags
|= current_inferior ()->symfile_flags
;
727 struct section_addr_info
*sap
;
729 /* Have we already loaded this shared object? */
730 ALL_OBJFILES (so
->objfile
)
732 if (filename_cmp (objfile_name (so
->objfile
), so
->so_name
) == 0
733 && so
->objfile
->addr_low
== so
->addr_low
)
736 if (so
->objfile
!= NULL
)
739 sap
= build_section_addr_info_from_section_table (so
->sections
,
741 so
->objfile
= symbol_file_add_from_bfd (so
->abfd
, so
->so_name
,
742 flags
, sap
, OBJF_SHARED
,
744 so
->objfile
->addr_low
= so
->addr_low
;
745 free_section_addr_info (sap
);
747 so
->symbols_loaded
= 1;
749 CATCH (e
, RETURN_MASK_ERROR
)
751 exception_fprintf (gdb_stderr
, e
, _("Error while reading shared"
752 " library symbols for %s:\n"),
763 /* Return 1 if KNOWN->objfile is used by any other so_list object in the
764 SO_LIST_HEAD list. Return 0 otherwise. */
767 solib_used (const struct so_list
*const known
)
769 const struct so_list
*pivot
;
771 for (pivot
= so_list_head
; pivot
!= NULL
; pivot
= pivot
->next
)
772 if (pivot
!= known
&& pivot
->objfile
== known
->objfile
)
777 /* Synchronize GDB's shared object list with inferior's.
779 Extract the list of currently loaded shared objects from the
780 inferior, and compare it with the list of shared objects currently
781 in GDB's so_list_head list. Edit so_list_head to bring it in sync
782 with the inferior's new list.
784 If we notice that the inferior has unloaded some shared objects,
785 free any symbolic info GDB had read about those shared objects.
787 Don't load symbolic info for any new shared objects; just add them
788 to the list, and leave their symbols_loaded flag clear.
790 If FROM_TTY is non-null, feel free to print messages about what
793 If TARGET is non-null, add the sections of all new shared objects
794 to TARGET's section table. Note that this doesn't remove any
795 sections for shared objects that have been unloaded, and it
796 doesn't check to see if the new shared objects are already present in
797 the section table. But we only use this for core files and
798 processes we've just attached to, so that's okay. */
801 update_solib_list (int from_tty
, struct target_ops
*target
)
803 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
804 struct so_list
*inferior
= ops
->current_sos();
805 struct so_list
*gdb
, **gdb_link
;
807 /* We can reach here due to changing solib-search-path or the
808 sysroot, before having any inferior. */
809 if (target_has_execution
&& !ptid_equal (inferior_ptid
, null_ptid
))
811 struct inferior
*inf
= current_inferior ();
813 /* If we are attaching to a running process for which we
814 have not opened a symbol file, we may be able to get its
816 if (inf
->attach_flag
&& symfile_objfile
== NULL
)
817 catch_errors (ops
->open_symbol_file_object
, &from_tty
,
818 "Error reading attached process's symbol file.\n",
822 /* GDB and the inferior's dynamic linker each maintain their own
823 list of currently loaded shared objects; we want to bring the
824 former in sync with the latter. Scan both lists, seeing which
825 shared objects appear where. There are three cases:
827 - A shared object appears on both lists. This means that GDB
828 knows about it already, and it's still loaded in the inferior.
829 Nothing needs to happen.
831 - A shared object appears only on GDB's list. This means that
832 the inferior has unloaded it. We should remove the shared
833 object from GDB's tables.
835 - A shared object appears only on the inferior's list. This
836 means that it's just been loaded. We should add it to GDB's
839 So we walk GDB's list, checking each entry to see if it appears
840 in the inferior's list too. If it does, no action is needed, and
841 we remove it from the inferior's list. If it doesn't, the
842 inferior has unloaded it, and we remove it from GDB's list. By
843 the time we're done walking GDB's list, the inferior's list
844 contains only the new shared objects, which we then add. */
847 gdb_link
= &so_list_head
;
850 struct so_list
*i
= inferior
;
851 struct so_list
**i_link
= &inferior
;
853 /* Check to see whether the shared object *gdb also appears in
854 the inferior's current list. */
859 if (ops
->same (gdb
, i
))
864 if (! filename_cmp (gdb
->so_original_name
, i
->so_original_name
))
872 /* If the shared object appears on the inferior's list too, then
873 it's still loaded, so we don't need to do anything. Delete
874 it from the inferior's list, and leave it on GDB's list. */
879 gdb_link
= &gdb
->next
;
883 /* If it's not on the inferior's list, remove it from GDB's tables. */
886 /* Notify any observer that the shared object has been
887 unloaded before we remove it from GDB's tables. */
888 observer_notify_solib_unloaded (gdb
);
890 VEC_safe_push (char_ptr
, current_program_space
->deleted_solibs
,
891 xstrdup (gdb
->so_name
));
893 *gdb_link
= gdb
->next
;
895 /* Unless the user loaded it explicitly, free SO's objfile. */
896 if (gdb
->objfile
&& ! (gdb
->objfile
->flags
& OBJF_USERLOADED
)
897 && !solib_used (gdb
))
898 free_objfile (gdb
->objfile
);
900 /* Some targets' section tables might be referring to
901 sections from so->abfd; remove them. */
902 remove_target_sections (gdb
);
909 /* Now the inferior's list contains only shared objects that don't
910 appear in GDB's list --- those that are newly loaded. Add them
911 to GDB's shared object list. */
915 const char *not_found_filename
= NULL
;
919 /* Add the new shared objects to GDB's list. */
920 *gdb_link
= inferior
;
922 /* Fill in the rest of each of the `struct so_list' nodes. */
923 for (i
= inferior
; i
; i
= i
->next
)
926 i
->pspace
= current_program_space
;
927 VEC_safe_push (so_list_ptr
, current_program_space
->added_solibs
, i
);
931 /* Fill in the rest of the `struct so_list' node. */
932 if (!solib_map_sections (i
))
935 if (not_found_filename
== NULL
)
936 not_found_filename
= i
->so_original_name
;
940 CATCH (e
, RETURN_MASK_ERROR
)
942 exception_fprintf (gdb_stderr
, e
,
943 _("Error while mapping shared "
944 "library sections:\n"));
948 /* Notify any observer that the shared object has been
949 loaded now that we've added it to GDB's tables. */
950 observer_notify_solib_loaded (i
);
953 /* If a library was not found, issue an appropriate warning
954 message. We have to use a single call to warning in case the
955 front end does something special with warnings, e.g., pop up
956 a dialog box. It Would Be Nice if we could get a "warning: "
957 prefix on each line in the CLI front end, though - it doesn't
961 warning (_("Could not load shared library symbols for %s.\n"
962 "Do you need \"set solib-search-path\" "
963 "or \"set sysroot\"?"),
965 else if (not_found
> 1)
967 Could not load shared library symbols for %d libraries, e.g. %s.\n\
968 Use the \"info sharedlibrary\" command to see the complete listing.\n\
969 Do you need \"set solib-search-path\" or \"set sysroot\"?"),
970 not_found
, not_found_filename
);
975 /* Return non-zero if NAME is the libpthread shared library.
977 Uses a fairly simplistic heuristic approach where we check
978 the file name against "/libpthread". This can lead to false
979 positives, but this should be good enough in practice. */
982 libpthread_name_p (const char *name
)
984 return (strstr (name
, "/libpthread") != NULL
);
987 /* Return non-zero if SO is the libpthread shared library. */
990 libpthread_solib_p (struct so_list
*so
)
992 return libpthread_name_p (so
->so_name
);
995 /* Read in symbolic information for any shared objects whose names
996 match PATTERN. (If we've already read a shared object's symbol
997 info, leave it alone.) If PATTERN is zero, read them all.
999 If READSYMS is 0, defer reading symbolic information until later
1000 but still do any needed low level processing.
1002 FROM_TTY and TARGET are as described for update_solib_list, above. */
1005 solib_add (const char *pattern
, int from_tty
,
1006 struct target_ops
*target
, int readsyms
)
1008 struct so_list
*gdb
;
1010 if (print_symbol_loading_p (from_tty
, 0, 0))
1012 if (pattern
!= NULL
)
1014 printf_unfiltered (_("Loading symbols for shared libraries: %s\n"),
1018 printf_unfiltered (_("Loading symbols for shared libraries.\n"));
1021 current_program_space
->solib_add_generation
++;
1025 char *re_err
= re_comp (pattern
);
1028 error (_("Invalid regexp: %s"), re_err
);
1031 update_solib_list (from_tty
, target
);
1033 /* Walk the list of currently loaded shared libraries, and read
1034 symbols for any that match the pattern --- or any whose symbols
1035 aren't already loaded, if no pattern was given. */
1037 int any_matches
= 0;
1038 int loaded_any_symbols
= 0;
1040 SYMFILE_DEFER_BP_RESET
| (from_tty
? SYMFILE_VERBOSE
: 0);
1042 for (gdb
= so_list_head
; gdb
; gdb
= gdb
->next
)
1043 if (! pattern
|| re_exec (gdb
->so_name
))
1045 /* Normally, we would read the symbols from that library
1046 only if READSYMS is set. However, we're making a small
1047 exception for the pthread library, because we sometimes
1048 need the library symbols to be loaded in order to provide
1049 thread support (x86-linux for instance). */
1050 const int add_this_solib
=
1051 (readsyms
|| libpthread_solib_p (gdb
));
1056 if (gdb
->symbols_loaded
)
1058 /* If no pattern was given, be quiet for shared
1059 libraries we have already loaded. */
1060 if (pattern
&& (from_tty
|| info_verbose
))
1061 printf_unfiltered (_("Symbols already loaded for %s\n"),
1064 else if (solib_read_symbols (gdb
, flags
))
1065 loaded_any_symbols
= 1;
1069 if (loaded_any_symbols
)
1070 breakpoint_re_set ();
1072 if (from_tty
&& pattern
&& ! any_matches
)
1074 ("No loaded shared libraries match the pattern `%s'.\n", pattern
);
1076 if (loaded_any_symbols
)
1078 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1080 /* Getting new symbols may change our opinion about what is
1082 reinit_frame_cache ();
1084 ops
->special_symbol_handling ();
1089 /* Implement the "info sharedlibrary" command. Walk through the
1090 shared library list and print information about each attached
1091 library matching PATTERN. If PATTERN is elided, print them
1095 info_sharedlibrary_command (char *pattern
, int from_tty
)
1097 struct so_list
*so
= NULL
; /* link map state variable */
1098 int so_missing_debug_info
= 0;
1101 struct cleanup
*table_cleanup
;
1102 struct gdbarch
*gdbarch
= target_gdbarch ();
1103 struct ui_out
*uiout
= current_uiout
;
1107 char *re_err
= re_comp (pattern
);
1110 error (_("Invalid regexp: %s"), re_err
);
1113 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
1114 addr_width
= 4 + (gdbarch_ptr_bit (gdbarch
) / 4);
1116 update_solib_list (from_tty
, 0);
1118 /* make_cleanup_ui_out_table_begin_end needs to know the number of
1119 rows, so we need to make two passes over the libs. */
1121 for (nr_libs
= 0, so
= so_list_head
; so
; so
= so
->next
)
1125 if (pattern
&& ! re_exec (so
->so_name
))
1132 make_cleanup_ui_out_table_begin_end (uiout
, 4, nr_libs
,
1133 "SharedLibraryTable");
1135 /* The "- 1" is because ui_out adds one space between columns. */
1136 ui_out_table_header (uiout
, addr_width
- 1, ui_left
, "from", "From");
1137 ui_out_table_header (uiout
, addr_width
- 1, ui_left
, "to", "To");
1138 ui_out_table_header (uiout
, 12 - 1, ui_left
, "syms-read", "Syms Read");
1139 ui_out_table_header (uiout
, 0, ui_noalign
,
1140 "name", "Shared Object Library");
1142 ui_out_table_body (uiout
);
1144 for (so
= so_list_head
; so
; so
= so
->next
)
1146 struct cleanup
*lib_cleanup
;
1148 if (! so
->so_name
[0])
1150 if (pattern
&& ! re_exec (so
->so_name
))
1153 lib_cleanup
= make_cleanup_ui_out_tuple_begin_end (uiout
, "lib");
1155 if (so
->addr_high
!= 0)
1157 ui_out_field_core_addr (uiout
, "from", gdbarch
, so
->addr_low
);
1158 ui_out_field_core_addr (uiout
, "to", gdbarch
, so
->addr_high
);
1162 ui_out_field_skip (uiout
, "from");
1163 ui_out_field_skip (uiout
, "to");
1166 if (! ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ()))
1167 && so
->symbols_loaded
1168 && !objfile_has_symbols (so
->objfile
))
1170 so_missing_debug_info
= 1;
1171 ui_out_field_string (uiout
, "syms-read", "Yes (*)");
1174 ui_out_field_string (uiout
, "syms-read",
1175 so
->symbols_loaded
? "Yes" : "No");
1177 ui_out_field_string (uiout
, "name", so
->so_name
);
1179 ui_out_text (uiout
, "\n");
1181 do_cleanups (lib_cleanup
);
1184 do_cleanups (table_cleanup
);
1189 ui_out_message (uiout
, 0,
1190 _("No shared libraries matched.\n"));
1192 ui_out_message (uiout
, 0,
1193 _("No shared libraries loaded at this time.\n"));
1197 if (so_missing_debug_info
)
1198 ui_out_message (uiout
, 0,
1199 _("(*): Shared library is missing "
1200 "debugging information.\n"));
1204 /* Return 1 if ADDRESS lies within SOLIB. */
1207 solib_contains_address_p (const struct so_list
*const solib
,
1210 struct target_section
*p
;
1212 for (p
= solib
->sections
; p
< solib
->sections_end
; p
++)
1213 if (p
->addr
<= address
&& address
< p
->endaddr
)
1219 /* If ADDRESS is in a shared lib in program space PSPACE, return its
1222 Provides a hook for other gdb routines to discover whether or not a
1223 particular address is within the mapped address space of a shared
1226 For example, this routine is called at one point to disable
1227 breakpoints which are in shared libraries that are not currently
1231 solib_name_from_address (struct program_space
*pspace
, CORE_ADDR address
)
1233 struct so_list
*so
= NULL
;
1235 for (so
= pspace
->so_list
; so
; so
= so
->next
)
1236 if (solib_contains_address_p (so
, address
))
1237 return (so
->so_name
);
1242 /* Return whether the data starting at VADDR, size SIZE, must be kept
1243 in a core file for shared libraries loaded before "gcore" is used
1244 to be handled correctly when the core file is loaded. This only
1245 applies when the section would otherwise not be kept in the core
1246 file (in particular, for readonly sections). */
1249 solib_keep_data_in_core (CORE_ADDR vaddr
, unsigned long size
)
1251 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1253 if (ops
->keep_data_in_core
)
1254 return ops
->keep_data_in_core (vaddr
, size
);
1259 /* Called by free_all_symtabs */
1264 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1266 /* This function is expected to handle ELF shared libraries. It is
1267 also used on Solaris, which can run either ELF or a.out binaries
1268 (for compatibility with SunOS 4), both of which can use shared
1269 libraries. So we don't know whether we have an ELF executable or
1270 an a.out executable until the user chooses an executable file.
1272 ELF shared libraries don't get mapped into the address space
1273 until after the program starts, so we'd better not try to insert
1274 breakpoints in them immediately. We have to wait until the
1275 dynamic linker has loaded them; we'll hit a bp_shlib_event
1276 breakpoint (look for calls to create_solib_event_breakpoint) when
1279 SunOS shared libraries seem to be different --- they're present
1280 as soon as the process begins execution, so there's no need to
1281 put off inserting breakpoints. There's also nowhere to put a
1282 bp_shlib_event breakpoint, so if we put it off, we'll never get
1285 So: disable breakpoints only if we're using ELF shared libs. */
1286 if (exec_bfd
!= NULL
1287 && bfd_get_flavour (exec_bfd
) != bfd_target_aout_flavour
)
1288 disable_breakpoints_in_shlibs ();
1290 while (so_list_head
)
1292 struct so_list
*so
= so_list_head
;
1294 so_list_head
= so
->next
;
1295 observer_notify_solib_unloaded (so
);
1296 remove_target_sections (so
);
1300 ops
->clear_solib ();
1303 /* Shared library startup support. When GDB starts up the inferior,
1304 it nurses it along (through the shell) until it is ready to execute
1305 its first instruction. At this point, this function gets
1309 solib_create_inferior_hook (int from_tty
)
1311 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1313 ops
->solib_create_inferior_hook (from_tty
);
1316 /* Check to see if an address is in the dynamic loader's dynamic
1317 symbol resolution code. Return 1 if so, 0 otherwise. */
1320 in_solib_dynsym_resolve_code (CORE_ADDR pc
)
1322 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1324 return ops
->in_dynsym_resolve_code (pc
);
1327 /* Implements the "sharedlibrary" command. */
1330 sharedlibrary_command (char *args
, int from_tty
)
1333 solib_add (args
, from_tty
, (struct target_ops
*) 0, 1);
1336 /* Implements the command "nosharedlibrary", which discards symbols
1337 that have been auto-loaded from shared libraries. Symbols from
1338 shared libraries that were added by explicit request of the user
1339 are not discarded. Also called from remote.c. */
1342 no_shared_libraries (char *ignored
, int from_tty
)
1344 /* The order of the two routines below is important: clear_solib notifies
1345 the solib_unloaded observers, and some of these observers might need
1346 access to their associated objfiles. Therefore, we can not purge the
1347 solibs' objfiles before clear_solib has been called. */
1350 objfile_purge_solibs ();
1356 update_solib_breakpoints (void)
1358 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1360 if (ops
->update_breakpoints
!= NULL
)
1361 ops
->update_breakpoints ();
1367 handle_solib_event (void)
1369 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1371 if (ops
->handle_event
!= NULL
)
1372 ops
->handle_event ();
1374 clear_program_space_solib_cache (current_inferior ()->pspace
);
1376 /* Check for any newly added shared libraries if we're supposed to
1377 be adding them automatically. Switch terminal for any messages
1378 produced by breakpoint_re_set. */
1379 target_terminal_ours_for_output ();
1380 solib_add (NULL
, 0, ¤t_target
, auto_solib_add
);
1381 target_terminal_inferior ();
1384 /* Reload shared libraries, but avoid reloading the same symbol file
1385 we already have loaded. */
1388 reload_shared_libraries_1 (int from_tty
)
1391 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
1393 if (print_symbol_loading_p (from_tty
, 0, 0))
1394 printf_unfiltered (_("Loading symbols for shared libraries.\n"));
1396 for (so
= so_list_head
; so
!= NULL
; so
= so
->next
)
1398 char *filename
, *found_pathname
= NULL
;
1400 int was_loaded
= so
->symbols_loaded
;
1402 SYMFILE_DEFER_BP_RESET
| (from_tty
? SYMFILE_VERBOSE
: 0);
1404 filename
= tilde_expand (so
->so_original_name
);
1405 make_cleanup (xfree
, filename
);
1406 abfd
= solib_bfd_open (filename
);
1409 found_pathname
= xstrdup (bfd_get_filename (abfd
));
1410 make_cleanup (xfree
, found_pathname
);
1411 gdb_bfd_unref (abfd
);
1414 /* If this shared library is no longer associated with its previous
1415 symbol file, close that. */
1416 if ((found_pathname
== NULL
&& was_loaded
)
1417 || (found_pathname
!= NULL
1418 && filename_cmp (found_pathname
, so
->so_name
) != 0))
1420 if (so
->objfile
&& ! (so
->objfile
->flags
& OBJF_USERLOADED
)
1421 && !solib_used (so
))
1422 free_objfile (so
->objfile
);
1423 remove_target_sections (so
);
1427 /* If this shared library is now associated with a new symbol
1429 if (found_pathname
!= NULL
1431 || filename_cmp (found_pathname
, so
->so_name
) != 0))
1437 solib_map_sections (so
);
1440 CATCH (e
, RETURN_MASK_ERROR
)
1442 exception_fprintf (gdb_stderr
, e
,
1443 _("Error while mapping "
1444 "shared library sections:\n"));
1450 && (auto_solib_add
|| was_loaded
|| libpthread_solib_p (so
)))
1451 solib_read_symbols (so
, flags
);
1455 do_cleanups (old_chain
);
1459 reload_shared_libraries (char *ignored
, int from_tty
,
1460 struct cmd_list_element
*e
)
1462 const struct target_so_ops
*ops
;
1464 reload_shared_libraries_1 (from_tty
);
1466 ops
= solib_ops (target_gdbarch ());
1468 /* Creating inferior hooks here has two purposes. First, if we reload
1469 shared libraries then the address of solib breakpoint we've computed
1470 previously might be no longer valid. For example, if we forgot to set
1471 solib-absolute-prefix and are setting it right now, then the previous
1472 breakpoint address is plain wrong. Second, installing solib hooks
1473 also implicitly figures were ld.so is and loads symbols for it.
1474 Absent this call, if we've just connected to a target and set
1475 solib-absolute-prefix or solib-search-path, we'll lose all information
1477 if (target_has_execution
)
1479 /* Reset or free private data structures not associated with
1481 ops
->clear_solib ();
1483 /* Remove any previous solib event breakpoint. This is usually
1484 done in common code, at breakpoint_init_inferior time, but
1485 we're not really starting up the inferior here. */
1486 remove_solib_event_breakpoints ();
1488 solib_create_inferior_hook (from_tty
);
1491 /* Sometimes the platform-specific hook loads initial shared
1492 libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be
1493 incorrectly 0 but such solib targets should be fixed anyway. If we
1494 made all the inferior hook methods consistent, this call could be
1495 removed. Call it only after the solib target has been initialized by
1496 solib_create_inferior_hook. */
1498 solib_add (NULL
, 0, NULL
, auto_solib_add
);
1500 breakpoint_re_set ();
1502 /* We may have loaded or unloaded debug info for some (or all)
1503 shared libraries. However, frames may still reference them. For
1504 example, a frame's unwinder might still point at DWARF FDE
1505 structures that are now freed. Also, getting new symbols may
1506 change our opinion about what is frameless. */
1507 reinit_frame_cache ();
1509 ops
->special_symbol_handling ();
1512 /* Wrapper for reload_shared_libraries that replaces "remote:"
1513 at the start of gdb_sysroot with "target:". */
1516 gdb_sysroot_changed (char *ignored
, int from_tty
,
1517 struct cmd_list_element
*e
)
1519 const char *old_prefix
= "remote:";
1520 const char *new_prefix
= TARGET_SYSROOT_PREFIX
;
1522 if (startswith (gdb_sysroot
, old_prefix
))
1524 static int warning_issued
= 0;
1526 gdb_assert (strlen (old_prefix
) == strlen (new_prefix
));
1527 memcpy (gdb_sysroot
, new_prefix
, strlen (new_prefix
));
1529 if (!warning_issued
)
1531 warning (_("\"%s\" is deprecated, use \"%s\" instead."),
1532 old_prefix
, new_prefix
);
1533 warning (_("sysroot set to \"%s\"."), gdb_sysroot
);
1539 reload_shared_libraries (ignored
, from_tty
, e
);
1543 show_auto_solib_add (struct ui_file
*file
, int from_tty
,
1544 struct cmd_list_element
*c
, const char *value
)
1546 fprintf_filtered (file
, _("Autoloading of shared library symbols is %s.\n"),
1551 /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call
1552 the library-specific handler if it is installed for the current target. */
1555 solib_global_lookup (struct objfile
*objfile
,
1557 const domain_enum domain
)
1559 const struct target_so_ops
*ops
= solib_ops (get_objfile_arch (objfile
));
1561 if (ops
->lookup_lib_global_symbol
!= NULL
)
1562 return ops
->lookup_lib_global_symbol (objfile
, name
, domain
);
1566 /* Lookup the value for a specific symbol from dynamic symbol table. Look
1567 up symbol from ABFD. MATCH_SYM is a callback function to determine
1568 whether to pick up a symbol. DATA is the input of this callback
1569 function. Return NULL if symbol is not found. */
1572 gdb_bfd_lookup_symbol_from_symtab (bfd
*abfd
,
1573 int (*match_sym
) (asymbol
*, void *),
1576 long storage_needed
= bfd_get_symtab_upper_bound (abfd
);
1577 CORE_ADDR symaddr
= 0;
1579 if (storage_needed
> 0)
1583 asymbol
**symbol_table
= (asymbol
**) xmalloc (storage_needed
);
1584 struct cleanup
*back_to
= make_cleanup (xfree
, symbol_table
);
1585 unsigned int number_of_symbols
=
1586 bfd_canonicalize_symtab (abfd
, symbol_table
);
1588 for (i
= 0; i
< number_of_symbols
; i
++)
1590 asymbol
*sym
= *symbol_table
++;
1592 if (match_sym (sym
, data
))
1594 struct gdbarch
*gdbarch
= target_gdbarch ();
1595 symaddr
= sym
->value
;
1597 /* Some ELF targets fiddle with addresses of symbols they
1598 consider special. They use minimal symbols to do that
1599 and this is needed for correct breakpoint placement,
1600 but we do not have full data here to build a complete
1601 minimal symbol, so just set the address and let the
1602 targets cope with that. */
1603 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1604 && gdbarch_elf_make_msymbol_special_p (gdbarch
))
1606 struct minimal_symbol msym
;
1608 memset (&msym
, 0, sizeof (msym
));
1609 SET_MSYMBOL_VALUE_ADDRESS (&msym
, symaddr
);
1610 gdbarch_elf_make_msymbol_special (gdbarch
, sym
, &msym
);
1611 symaddr
= MSYMBOL_VALUE_RAW_ADDRESS (&msym
);
1614 /* BFD symbols are section relative. */
1615 symaddr
+= sym
->section
->vma
;
1619 do_cleanups (back_to
);
1625 /* Lookup the value for a specific symbol from symbol table. Look up symbol
1626 from ABFD. MATCH_SYM is a callback function to determine whether to pick
1627 up a symbol. DATA is the input of this callback function. Return NULL
1628 if symbol is not found. */
1631 bfd_lookup_symbol_from_dyn_symtab (bfd
*abfd
,
1632 int (*match_sym
) (asymbol
*, void *),
1635 long storage_needed
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1636 CORE_ADDR symaddr
= 0;
1638 if (storage_needed
> 0)
1641 asymbol
**symbol_table
= (asymbol
**) xmalloc (storage_needed
);
1642 struct cleanup
*back_to
= make_cleanup (xfree
, symbol_table
);
1643 unsigned int number_of_symbols
=
1644 bfd_canonicalize_dynamic_symtab (abfd
, symbol_table
);
1646 for (i
= 0; i
< number_of_symbols
; i
++)
1648 asymbol
*sym
= *symbol_table
++;
1650 if (match_sym (sym
, data
))
1652 /* BFD symbols are section relative. */
1653 symaddr
= sym
->value
+ sym
->section
->vma
;
1657 do_cleanups (back_to
);
1662 /* Lookup the value for a specific symbol from symbol table and dynamic
1663 symbol table. Look up symbol from ABFD. MATCH_SYM is a callback
1664 function to determine whether to pick up a symbol. DATA is the
1665 input of this callback function. Return NULL if symbol is not
1669 gdb_bfd_lookup_symbol (bfd
*abfd
,
1670 int (*match_sym
) (asymbol
*, void *),
1673 CORE_ADDR symaddr
= gdb_bfd_lookup_symbol_from_symtab (abfd
, match_sym
, data
);
1675 /* On FreeBSD, the dynamic linker is stripped by default. So we'll
1676 have to check the dynamic string table too. */
1678 symaddr
= bfd_lookup_symbol_from_dyn_symtab (abfd
, match_sym
, data
);
1683 /* SO_LIST_HEAD may contain user-loaded object files that can be removed
1684 out-of-band by the user. So upon notification of free_objfile remove
1685 all references to any user-loaded file that is about to be freed. */
1688 remove_user_added_objfile (struct objfile
*objfile
)
1692 if (objfile
!= 0 && objfile
->flags
& OBJF_USERLOADED
)
1694 for (so
= so_list_head
; so
!= NULL
; so
= so
->next
)
1695 if (so
->objfile
== objfile
)
1700 /* Default implementation does not perform any validation. */
1703 default_solib_validate (const struct so_list
*const so
)
1705 return NULL
; /* No validation. */
1708 extern initialize_file_ftype _initialize_solib
; /* -Wmissing-prototypes */
1711 _initialize_solib (void)
1713 solib_data
= gdbarch_data_register_pre_init (solib_init
);
1715 observer_attach_free_objfile (remove_user_added_objfile
);
1717 add_com ("sharedlibrary", class_files
, sharedlibrary_command
,
1718 _("Load shared object library symbols for files matching REGEXP."));
1719 add_info ("sharedlibrary", info_sharedlibrary_command
,
1720 _("Status of loaded shared object libraries."));
1721 add_info_alias ("dll", "sharedlibrary", 1);
1722 add_com ("nosharedlibrary", class_files
, no_shared_libraries
,
1723 _("Unload all shared object library symbols."));
1725 add_setshow_boolean_cmd ("auto-solib-add", class_support
,
1726 &auto_solib_add
, _("\
1727 Set autoloading of shared library symbols."), _("\
1728 Show autoloading of shared library symbols."), _("\
1729 If \"on\", symbols from all shared object libraries will be loaded\n\
1730 automatically when the inferior begins execution, when the dynamic linker\n\
1731 informs gdb that a new library has been loaded, or when attaching to the\n\
1732 inferior. Otherwise, symbols must be loaded manually, using \
1735 show_auto_solib_add
,
1736 &setlist
, &showlist
);
1738 add_setshow_optional_filename_cmd ("sysroot", class_support
,
1740 Set an alternate system root."), _("\
1741 Show the current system root."), _("\
1742 The system root is used to load absolute shared library symbol files.\n\
1743 For other (relative) files, you can add directories using\n\
1744 `set solib-search-path'."),
1745 gdb_sysroot_changed
,
1747 &setlist
, &showlist
);
1749 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1751 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1754 add_setshow_optional_filename_cmd ("solib-search-path", class_support
,
1755 &solib_search_path
, _("\
1756 Set the search path for loading non-absolute shared library symbol files."),
1758 Show the search path for loading non-absolute shared library symbol files."),
1760 This takes precedence over the environment variables \
1761 PATH and LD_LIBRARY_PATH."),
1762 reload_shared_libraries
,
1763 show_solib_search_path
,
1764 &setlist
, &showlist
);
1766 add_setshow_boolean_cmd ("validate-build-id", class_support
,
1767 &validate_build_id
, _("\
1768 Set validation a build-id matches to load a shared library."), _("\
1769 SHow validation a build-id matches to load a shared library."), _("\
1770 Inferior shared library and symbol file may contain unique build-id.\n\
1771 If both build-ids are present but they do not match then this setting\n\
1772 enables (off) or disables (on) loading of such symbol file.\n\
1773 Loading non-matching symbol file may confuse debugging including breakage\n\
1774 of backtrace output."),
1776 show_validate_build_id
,
1777 &setlist
, &showlist
);