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
;
164 /* If the absolute prefix starts with "target:" but the
165 filesystem accessed by the target_fileio_* methods
166 is the local filesystem then we strip the "target:"
167 prefix now and work with the local filesystem. This
168 ensures that the same search algorithm is used for
169 all local files regardless of whether a "target:"
171 if (is_target_filename (sysroot
) && target_filesystem_is_local ())
172 sysroot
+= strlen (TARGET_SYSROOT_PREFIX
);
174 if (*sysroot
== '\0')
180 int prefix_len
= strlen (sysroot
);
182 /* Remove trailing slashes from absolute prefix. */
183 while (prefix_len
> 0
184 && IS_DIR_SEPARATOR (sysroot
[prefix_len
- 1]))
187 sysroot
= savestring (sysroot
, prefix_len
);
188 make_cleanup (xfree
, sysroot
);
191 /* If we're on a non-DOS-based system, backslashes won't be
192 understood as directory separator, so, convert them to forward
193 slashes, iff we're supposed to handle DOS-based file system
194 semantics for target paths. */
195 if (!DOS_BASED_FILE_SYSTEM
&& fskind
== file_system_kind_dos_based
)
199 /* Avoid clobbering our input. */
200 p
= alloca (strlen (in_pathname
) + 1);
201 strcpy (p
, in_pathname
);
211 /* Note, we're interested in IS_TARGET_ABSOLUTE_PATH, not
212 IS_ABSOLUTE_PATH. The latter is for host paths only, while
213 IN_PATHNAME is a target path. For example, if we're supposed to
214 be handling DOS-like semantics we want to consider a
215 'c:/foo/bar.dll' path as an absolute path, even on a Unix box.
216 With such a path, before giving up on the sysroot, we'll try:
218 1st attempt, c:/foo/bar.dll ==> /sysroot/c:/foo/bar.dll
219 2nd attempt, c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll
220 3rd attempt, c:/foo/bar.dll ==> /sysroot/foo/bar.dll
223 if (!IS_TARGET_ABSOLUTE_PATH (fskind
, in_pathname
) || sysroot
== NULL
)
224 temp_pathname
= xstrdup (in_pathname
);
227 int need_dir_separator
;
229 /* Concatenate the sysroot and the target reported filename. We
230 may need to glue them with a directory separator. Cases to
233 | sysroot | separator | in_pathname |
234 |-----------------+-----------+----------------|
235 | /some/dir | / | c:/foo/bar.dll |
236 | /some/dir | | /foo/bar.dll |
237 | target: | | c:/foo/bar.dll |
238 | target: | | /foo/bar.dll |
239 | target:some/dir | / | c:/foo/bar.dll |
240 | target:some/dir | | /foo/bar.dll |
242 IOW, we don't need to add a separator if IN_PATHNAME already
243 has one, or when the the sysroot is exactly "target:".
244 There's no need to check for drive spec explicitly, as we only
245 get here if IN_PATHNAME is considered an absolute path. */
246 need_dir_separator
= !(IS_DIR_SEPARATOR (in_pathname
[0])
247 || strcmp (TARGET_SYSROOT_PREFIX
, sysroot
) == 0);
249 /* Cat the prefixed pathname together. */
250 temp_pathname
= concat (sysroot
,
251 need_dir_separator
? SLASH_STRING
: "",
252 in_pathname
, (char *) NULL
);
255 /* Handle files to be accessed via the target. */
256 if (is_target_filename (temp_pathname
))
260 do_cleanups (old_chain
);
261 return temp_pathname
;
264 /* Now see if we can open it. */
265 found_file
= gdb_open_cloexec (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
267 xfree (temp_pathname
);
269 /* If the search in gdb_sysroot failed, and the path name has a
270 drive spec (e.g, c:/foo), try stripping ':' from the drive spec,
271 and retrying in the sysroot:
272 c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll. */
276 && HAS_TARGET_DRIVE_SPEC (fskind
, in_pathname
))
278 int need_dir_separator
= !IS_DIR_SEPARATOR (in_pathname
[2]);
279 char *drive
= savestring (in_pathname
, 1);
281 temp_pathname
= concat (sysroot
,
284 need_dir_separator
? SLASH_STRING
: "",
285 in_pathname
+ 2, (char *) NULL
);
288 found_file
= gdb_open_cloexec (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
291 xfree (temp_pathname
);
293 /* If the search in gdb_sysroot still failed, try fully
294 stripping the drive spec, and trying once more in the
295 sysroot before giving up.
297 c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */
299 temp_pathname
= concat (sysroot
,
300 need_dir_separator
? SLASH_STRING
: "",
301 in_pathname
+ 2, (char *) NULL
);
303 found_file
= gdb_open_cloexec (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
305 xfree (temp_pathname
);
309 do_cleanups (old_chain
);
311 /* We try to find the library in various ways. After each attempt,
312 either found_file >= 0 and temp_pathname is a malloc'd string, or
313 found_file < 0 and temp_pathname does not point to storage that
314 needs to be freed. */
317 temp_pathname
= NULL
;
319 /* If the search in gdb_sysroot failed, and the path name is
320 absolute at this point, make it relative. (openp will try and open the
321 file according to its absolute path otherwise, which is not what we want.)
322 Affects subsequent searches for this solib. */
323 if (found_file
< 0 && IS_TARGET_ABSOLUTE_PATH (fskind
, in_pathname
))
325 /* First, get rid of any drive letters etc. */
326 while (!IS_TARGET_DIR_SEPARATOR (fskind
, *in_pathname
))
329 /* Next, get rid of all leading dir separators. */
330 while (IS_TARGET_DIR_SEPARATOR (fskind
, *in_pathname
))
334 /* If not found, and we're looking for a solib, search the
335 solib_search_path (if any). */
336 if (is_solib
&& found_file
< 0 && solib_search_path
!= NULL
)
337 found_file
= openp (solib_search_path
,
338 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
339 in_pathname
, O_RDONLY
| O_BINARY
, &temp_pathname
);
341 /* If not found, and we're looking for a solib, next search the
342 solib_search_path (if any) for the basename only (ignoring the
343 path). This is to allow reading solibs from a path that differs
344 from the opened path. */
345 if (is_solib
&& found_file
< 0 && solib_search_path
!= NULL
)
346 found_file
= openp (solib_search_path
,
347 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
348 target_lbasename (fskind
, in_pathname
),
349 O_RDONLY
| O_BINARY
, &temp_pathname
);
351 /* If not found, and we're looking for a solib, try to use target
352 supplied solib search method. */
353 if (is_solib
&& found_file
< 0 && ops
->find_and_open_solib
)
354 found_file
= ops
->find_and_open_solib (in_pathname
, O_RDONLY
| O_BINARY
,
357 /* If not found, next search the inferior's $PATH environment variable. */
358 if (found_file
< 0 && sysroot
== NULL
)
359 found_file
= openp (get_in_environ (current_inferior ()->environment
,
361 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
, in_pathname
,
362 O_RDONLY
| O_BINARY
, &temp_pathname
);
364 /* If not found, and we're looking for a solib, next search the
365 inferior's $LD_LIBRARY_PATH environment variable. */
366 if (is_solib
&& found_file
< 0 && sysroot
== NULL
)
367 found_file
= openp (get_in_environ (current_inferior ()->environment
,
369 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
, in_pathname
,
370 O_RDONLY
| O_BINARY
, &temp_pathname
);
380 return temp_pathname
;
383 /* Return the full pathname of the main executable, or NULL if not
384 found. The returned pathname is malloc'ed and must be freed by
385 the caller. If FD is non-NULL, *FD is set to either -1 or an open
386 file handle for the main executable.
388 The search algorithm used is described in solib_find_1's comment
392 exec_file_find (char *in_pathname
, int *fd
)
394 char *result
= solib_find_1 (in_pathname
, fd
, 0);
398 const char *fskind
= effective_target_file_system_kind ();
400 if (fskind
== file_system_kind_dos_based
)
404 new_pathname
= alloca (strlen (in_pathname
) + 5);
405 strcpy (new_pathname
, in_pathname
);
406 strcat (new_pathname
, ".exe");
408 result
= solib_find_1 (new_pathname
, fd
, 0);
415 /* Return the full pathname of a shared library file, or NULL if not
416 found. The returned pathname is malloc'ed and must be freed by
417 the caller. If FD is non-NULL, *FD is set to either -1 or an open
418 file handle for the shared library.
420 The search algorithm used is described in solib_find_1's comment
424 solib_find (char *in_pathname
, int *fd
)
426 const char *solib_symbols_extension
427 = gdbarch_solib_symbols_extension (target_gdbarch ());
429 /* If solib_symbols_extension is set, replace the file's
431 if (solib_symbols_extension
!= NULL
)
433 char *p
= in_pathname
+ strlen (in_pathname
);
435 while (p
> in_pathname
&& *p
!= '.')
442 new_pathname
= alloca (p
- in_pathname
+ 1
443 + strlen (solib_symbols_extension
) + 1);
444 memcpy (new_pathname
, in_pathname
, p
- in_pathname
+ 1);
445 strcpy (new_pathname
+ (p
- in_pathname
) + 1,
446 solib_symbols_extension
);
448 in_pathname
= new_pathname
;
452 return solib_find_1 (in_pathname
, fd
, 1);
455 /* Open and return a BFD for the shared library PATHNAME. If FD is not -1,
456 it is used as file handle to open the file. Throws an error if the file
457 could not be opened. Handles both local and remote file access.
459 PATHNAME must be malloc'ed by the caller. It will be freed by this
460 function. If unsuccessful, the FD will be closed (unless FD was
464 solib_bfd_fopen (char *pathname
, int fd
)
466 bfd
*abfd
= gdb_bfd_open (pathname
, gnutarget
, fd
);
468 if (abfd
!= NULL
&& !gdb_bfd_has_target_filename (abfd
))
469 bfd_set_cacheable (abfd
, 1);
473 make_cleanup (xfree
, pathname
);
474 error (_("Could not open `%s' as an executable file: %s"),
475 pathname
, bfd_errmsg (bfd_get_error ()));
483 /* Find shared library PATHNAME and open a BFD for it. */
486 solib_bfd_open (char *pathname
)
488 char *found_pathname
;
491 const struct bfd_arch_info
*b
;
493 /* Search for shared library file. */
494 found_pathname
= solib_find (pathname
, &found_file
);
495 if (found_pathname
== NULL
)
497 /* Return failure if the file could not be found, so that we can
498 accumulate messages about missing libraries. */
502 perror_with_name (pathname
);
505 /* Open bfd for shared library. */
506 abfd
= solib_bfd_fopen (found_pathname
, found_file
);
508 /* Check bfd format. */
509 if (!bfd_check_format (abfd
, bfd_object
))
511 make_cleanup_bfd_unref (abfd
);
512 error (_("`%s': not in executable format: %s"),
513 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
516 /* Check bfd arch. */
517 b
= gdbarch_bfd_arch_info (target_gdbarch ());
518 if (!b
->compatible (b
, bfd_get_arch_info (abfd
)))
519 warning (_("`%s': Shared library architecture %s is not compatible "
520 "with target architecture %s."), bfd_get_filename (abfd
),
521 bfd_get_arch_info (abfd
)->printable_name
, b
->printable_name
);
526 /* Given a pointer to one of the shared objects in our list of mapped
527 objects, use the recorded name to open a bfd descriptor for the
528 object, build a section table, relocate all the section addresses
529 by the base address at which the shared object was mapped, and then
530 add the sections to the target's section table.
532 FIXME: In most (all?) cases the shared object file name recorded in
533 the dynamic linkage tables will be a fully qualified pathname. For
534 cases where it isn't, do we really mimic the systems search
535 mechanism correctly in the below code (particularly the tilde
536 expansion stuff?). */
539 solib_map_sections (struct so_list
*so
)
541 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
543 struct target_section
*p
;
544 struct cleanup
*old_chain
;
547 filename
= tilde_expand (so
->so_name
);
548 old_chain
= make_cleanup (xfree
, filename
);
549 abfd
= ops
->bfd_open (filename
);
550 do_cleanups (old_chain
);
555 /* Leave bfd open, core_xfer_memory and "info files" need it. */
558 /* Copy the full path name into so_name, allowing symbol_file_add
559 to find it later. This also affects the =library-loaded GDB/MI
560 event, and in particular the part of that notification providing
561 the library's host-side path. If we let the target dictate
562 that objfile's path, and the target is different from the host,
563 GDB/MI will not provide the correct host-side path. */
564 if (strlen (bfd_get_filename (abfd
)) >= SO_NAME_MAX_PATH_SIZE
)
565 error (_("Shared library file name is too long."));
566 strcpy (so
->so_name
, bfd_get_filename (abfd
));
568 if (build_section_table (abfd
, &so
->sections
, &so
->sections_end
))
570 error (_("Can't find the file sections in `%s': %s"),
571 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
574 for (p
= so
->sections
; p
< so
->sections_end
; p
++)
576 /* Relocate the section binding addresses as recorded in the shared
577 object's file by the base address to which the object was actually
579 ops
->relocate_section_addresses (so
, p
);
581 /* If the target didn't provide information about the address
582 range of the shared object, assume we want the location of
583 the .text section. */
584 if (so
->addr_low
== 0 && so
->addr_high
== 0
585 && strcmp (p
->the_bfd_section
->name
, ".text") == 0)
587 so
->addr_low
= p
->addr
;
588 so
->addr_high
= p
->endaddr
;
592 /* Add the shared object's sections to the current set of file
593 section tables. Do this immediately after mapping the object so
594 that later nodes in the list can query this object, as is needed
596 add_target_sections (so
, so
->sections
, so
->sections_end
);
601 /* Free symbol-file related contents of SO and reset for possible reloading
602 of SO. If we have opened a BFD for SO, close it. If we have placed SO's
603 sections in some target's section table, the caller is responsible for
606 This function doesn't mess with objfiles at all. If there is an
607 objfile associated with SO that needs to be removed, the caller is
608 responsible for taking care of that. */
611 clear_so (struct so_list
*so
)
613 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
617 xfree (so
->sections
);
618 so
->sections
= so
->sections_end
= NULL
;
621 gdb_bfd_unref (so
->abfd
);
624 /* Our caller closed the objfile, possibly via objfile_purge_solibs. */
625 so
->symbols_loaded
= 0;
628 so
->addr_low
= so
->addr_high
= 0;
630 /* Restore the target-supplied file name. SO_NAME may be the path
631 of the symbol file. */
632 strcpy (so
->so_name
, so
->so_original_name
);
634 /* Do the same for target-specific data. */
635 if (ops
->clear_so
!= NULL
)
639 /* Free the storage associated with the `struct so_list' object SO.
640 If we have opened a BFD for SO, close it.
642 The caller is responsible for removing SO from whatever list it is
643 a member of. If we have placed SO's sections in some target's
644 section table, the caller is responsible for removing them.
646 This function doesn't mess with objfiles at all. If there is an
647 objfile associated with SO that needs to be removed, the caller is
648 responsible for taking care of that. */
651 free_so (struct so_list
*so
)
653 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
662 /* Return address of first so_list entry in master shared object list. */
664 master_so_list (void)
669 /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS,
670 be chatty about it. Return non-zero if any symbols were actually
674 solib_read_symbols (struct so_list
*so
, int flags
)
676 if (so
->symbols_loaded
)
678 /* If needed, we've already warned in our caller. */
680 else if (so
->abfd
== NULL
)
682 /* We've already warned about this library, when trying to open
688 flags
|= current_inferior ()->symfile_flags
;
692 struct section_addr_info
*sap
;
694 /* Have we already loaded this shared object? */
695 ALL_OBJFILES (so
->objfile
)
697 if (filename_cmp (objfile_name (so
->objfile
), so
->so_name
) == 0
698 && so
->objfile
->addr_low
== so
->addr_low
)
701 if (so
->objfile
!= NULL
)
704 sap
= build_section_addr_info_from_section_table (so
->sections
,
706 so
->objfile
= symbol_file_add_from_bfd (so
->abfd
, so
->so_name
,
707 flags
, sap
, OBJF_SHARED
,
709 so
->objfile
->addr_low
= so
->addr_low
;
710 free_section_addr_info (sap
);
712 so
->symbols_loaded
= 1;
714 CATCH (e
, RETURN_MASK_ERROR
)
716 exception_fprintf (gdb_stderr
, e
, _("Error while reading shared"
717 " library symbols for %s:\n"),
728 /* Return 1 if KNOWN->objfile is used by any other so_list object in the
729 SO_LIST_HEAD list. Return 0 otherwise. */
732 solib_used (const struct so_list
*const known
)
734 const struct so_list
*pivot
;
736 for (pivot
= so_list_head
; pivot
!= NULL
; pivot
= pivot
->next
)
737 if (pivot
!= known
&& pivot
->objfile
== known
->objfile
)
742 /* Synchronize GDB's shared object list with inferior's.
744 Extract the list of currently loaded shared objects from the
745 inferior, and compare it with the list of shared objects currently
746 in GDB's so_list_head list. Edit so_list_head to bring it in sync
747 with the inferior's new list.
749 If we notice that the inferior has unloaded some shared objects,
750 free any symbolic info GDB had read about those shared objects.
752 Don't load symbolic info for any new shared objects; just add them
753 to the list, and leave their symbols_loaded flag clear.
755 If FROM_TTY is non-null, feel free to print messages about what
758 If TARGET is non-null, add the sections of all new shared objects
759 to TARGET's section table. Note that this doesn't remove any
760 sections for shared objects that have been unloaded, and it
761 doesn't check to see if the new shared objects are already present in
762 the section table. But we only use this for core files and
763 processes we've just attached to, so that's okay. */
766 update_solib_list (int from_tty
, struct target_ops
*target
)
768 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
769 struct so_list
*inferior
= ops
->current_sos();
770 struct so_list
*gdb
, **gdb_link
;
772 /* We can reach here due to changing solib-search-path or the
773 sysroot, before having any inferior. */
774 if (target_has_execution
&& !ptid_equal (inferior_ptid
, null_ptid
))
776 struct inferior
*inf
= current_inferior ();
778 /* If we are attaching to a running process for which we
779 have not opened a symbol file, we may be able to get its
781 if (inf
->attach_flag
&& symfile_objfile
== NULL
)
782 catch_errors (ops
->open_symbol_file_object
, &from_tty
,
783 "Error reading attached process's symbol file.\n",
787 /* GDB and the inferior's dynamic linker each maintain their own
788 list of currently loaded shared objects; we want to bring the
789 former in sync with the latter. Scan both lists, seeing which
790 shared objects appear where. There are three cases:
792 - A shared object appears on both lists. This means that GDB
793 knows about it already, and it's still loaded in the inferior.
794 Nothing needs to happen.
796 - A shared object appears only on GDB's list. This means that
797 the inferior has unloaded it. We should remove the shared
798 object from GDB's tables.
800 - A shared object appears only on the inferior's list. This
801 means that it's just been loaded. We should add it to GDB's
804 So we walk GDB's list, checking each entry to see if it appears
805 in the inferior's list too. If it does, no action is needed, and
806 we remove it from the inferior's list. If it doesn't, the
807 inferior has unloaded it, and we remove it from GDB's list. By
808 the time we're done walking GDB's list, the inferior's list
809 contains only the new shared objects, which we then add. */
812 gdb_link
= &so_list_head
;
815 struct so_list
*i
= inferior
;
816 struct so_list
**i_link
= &inferior
;
818 /* Check to see whether the shared object *gdb also appears in
819 the inferior's current list. */
824 if (ops
->same (gdb
, i
))
829 if (! filename_cmp (gdb
->so_original_name
, i
->so_original_name
))
837 /* If the shared object appears on the inferior's list too, then
838 it's still loaded, so we don't need to do anything. Delete
839 it from the inferior's list, and leave it on GDB's list. */
844 gdb_link
= &gdb
->next
;
848 /* If it's not on the inferior's list, remove it from GDB's tables. */
851 /* Notify any observer that the shared object has been
852 unloaded before we remove it from GDB's tables. */
853 observer_notify_solib_unloaded (gdb
);
855 VEC_safe_push (char_ptr
, current_program_space
->deleted_solibs
,
856 xstrdup (gdb
->so_name
));
858 *gdb_link
= gdb
->next
;
860 /* Unless the user loaded it explicitly, free SO's objfile. */
861 if (gdb
->objfile
&& ! (gdb
->objfile
->flags
& OBJF_USERLOADED
)
862 && !solib_used (gdb
))
863 free_objfile (gdb
->objfile
);
865 /* Some targets' section tables might be referring to
866 sections from so->abfd; remove them. */
867 remove_target_sections (gdb
);
874 /* Now the inferior's list contains only shared objects that don't
875 appear in GDB's list --- those that are newly loaded. Add them
876 to GDB's shared object list. */
880 const char *not_found_filename
= NULL
;
884 /* Add the new shared objects to GDB's list. */
885 *gdb_link
= inferior
;
887 /* Fill in the rest of each of the `struct so_list' nodes. */
888 for (i
= inferior
; i
; i
= i
->next
)
891 i
->pspace
= current_program_space
;
892 VEC_safe_push (so_list_ptr
, current_program_space
->added_solibs
, i
);
896 /* Fill in the rest of the `struct so_list' node. */
897 if (!solib_map_sections (i
))
900 if (not_found_filename
== NULL
)
901 not_found_filename
= i
->so_original_name
;
905 CATCH (e
, RETURN_MASK_ERROR
)
907 exception_fprintf (gdb_stderr
, e
,
908 _("Error while mapping shared "
909 "library sections:\n"));
913 /* Notify any observer that the shared object has been
914 loaded now that we've added it to GDB's tables. */
915 observer_notify_solib_loaded (i
);
918 /* If a library was not found, issue an appropriate warning
919 message. We have to use a single call to warning in case the
920 front end does something special with warnings, e.g., pop up
921 a dialog box. It Would Be Nice if we could get a "warning: "
922 prefix on each line in the CLI front end, though - it doesn't
926 warning (_("Could not load shared library symbols for %s.\n"
927 "Do you need \"set solib-search-path\" "
928 "or \"set sysroot\"?"),
930 else if (not_found
> 1)
932 Could not load shared library symbols for %d libraries, e.g. %s.\n\
933 Use the \"info sharedlibrary\" command to see the complete listing.\n\
934 Do you need \"set solib-search-path\" or \"set sysroot\"?"),
935 not_found
, not_found_filename
);
940 /* Return non-zero if NAME is the libpthread shared library.
942 Uses a fairly simplistic heuristic approach where we check
943 the file name against "/libpthread". This can lead to false
944 positives, but this should be good enough in practice. */
947 libpthread_name_p (const char *name
)
949 return (strstr (name
, "/libpthread") != NULL
);
952 /* Return non-zero if SO is the libpthread shared library. */
955 libpthread_solib_p (struct so_list
*so
)
957 return libpthread_name_p (so
->so_name
);
960 /* Read in symbolic information for any shared objects whose names
961 match PATTERN. (If we've already read a shared object's symbol
962 info, leave it alone.) If PATTERN is zero, read them all.
964 If READSYMS is 0, defer reading symbolic information until later
965 but still do any needed low level processing.
967 FROM_TTY and TARGET are as described for update_solib_list, above. */
970 solib_add (const char *pattern
, int from_tty
,
971 struct target_ops
*target
, int readsyms
)
975 if (print_symbol_loading_p (from_tty
, 0, 0))
979 printf_unfiltered (_("Loading symbols for shared libraries: %s\n"),
983 printf_unfiltered (_("Loading symbols for shared libraries.\n"));
986 current_program_space
->solib_add_generation
++;
990 char *re_err
= re_comp (pattern
);
993 error (_("Invalid regexp: %s"), re_err
);
996 update_solib_list (from_tty
, target
);
998 /* Walk the list of currently loaded shared libraries, and read
999 symbols for any that match the pattern --- or any whose symbols
1000 aren't already loaded, if no pattern was given. */
1002 int any_matches
= 0;
1003 int loaded_any_symbols
= 0;
1005 SYMFILE_DEFER_BP_RESET
| (from_tty
? SYMFILE_VERBOSE
: 0);
1007 for (gdb
= so_list_head
; gdb
; gdb
= gdb
->next
)
1008 if (! pattern
|| re_exec (gdb
->so_name
))
1010 /* Normally, we would read the symbols from that library
1011 only if READSYMS is set. However, we're making a small
1012 exception for the pthread library, because we sometimes
1013 need the library symbols to be loaded in order to provide
1014 thread support (x86-linux for instance). */
1015 const int add_this_solib
=
1016 (readsyms
|| libpthread_solib_p (gdb
));
1021 if (gdb
->symbols_loaded
)
1023 /* If no pattern was given, be quiet for shared
1024 libraries we have already loaded. */
1025 if (pattern
&& (from_tty
|| info_verbose
))
1026 printf_unfiltered (_("Symbols already loaded for %s\n"),
1029 else if (solib_read_symbols (gdb
, flags
))
1030 loaded_any_symbols
= 1;
1034 if (loaded_any_symbols
)
1035 breakpoint_re_set ();
1037 if (from_tty
&& pattern
&& ! any_matches
)
1039 ("No loaded shared libraries match the pattern `%s'.\n", pattern
);
1041 if (loaded_any_symbols
)
1043 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1045 /* Getting new symbols may change our opinion about what is
1047 reinit_frame_cache ();
1049 ops
->special_symbol_handling ();
1054 /* Implement the "info sharedlibrary" command. Walk through the
1055 shared library list and print information about each attached
1056 library matching PATTERN. If PATTERN is elided, print them
1060 info_sharedlibrary_command (char *pattern
, int from_tty
)
1062 struct so_list
*so
= NULL
; /* link map state variable */
1063 int so_missing_debug_info
= 0;
1066 struct cleanup
*table_cleanup
;
1067 struct gdbarch
*gdbarch
= target_gdbarch ();
1068 struct ui_out
*uiout
= current_uiout
;
1072 char *re_err
= re_comp (pattern
);
1075 error (_("Invalid regexp: %s"), re_err
);
1078 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
1079 addr_width
= 4 + (gdbarch_ptr_bit (gdbarch
) / 4);
1081 update_solib_list (from_tty
, 0);
1083 /* make_cleanup_ui_out_table_begin_end needs to know the number of
1084 rows, so we need to make two passes over the libs. */
1086 for (nr_libs
= 0, so
= so_list_head
; so
; so
= so
->next
)
1090 if (pattern
&& ! re_exec (so
->so_name
))
1097 make_cleanup_ui_out_table_begin_end (uiout
, 4, nr_libs
,
1098 "SharedLibraryTable");
1100 /* The "- 1" is because ui_out adds one space between columns. */
1101 ui_out_table_header (uiout
, addr_width
- 1, ui_left
, "from", "From");
1102 ui_out_table_header (uiout
, addr_width
- 1, ui_left
, "to", "To");
1103 ui_out_table_header (uiout
, 12 - 1, ui_left
, "syms-read", "Syms Read");
1104 ui_out_table_header (uiout
, 0, ui_noalign
,
1105 "name", "Shared Object Library");
1107 ui_out_table_body (uiout
);
1109 for (so
= so_list_head
; so
; so
= so
->next
)
1111 struct cleanup
*lib_cleanup
;
1113 if (! so
->so_name
[0])
1115 if (pattern
&& ! re_exec (so
->so_name
))
1118 lib_cleanup
= make_cleanup_ui_out_tuple_begin_end (uiout
, "lib");
1120 if (so
->addr_high
!= 0)
1122 ui_out_field_core_addr (uiout
, "from", gdbarch
, so
->addr_low
);
1123 ui_out_field_core_addr (uiout
, "to", gdbarch
, so
->addr_high
);
1127 ui_out_field_skip (uiout
, "from");
1128 ui_out_field_skip (uiout
, "to");
1131 if (! ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ()))
1132 && so
->symbols_loaded
1133 && !objfile_has_symbols (so
->objfile
))
1135 so_missing_debug_info
= 1;
1136 ui_out_field_string (uiout
, "syms-read", "Yes (*)");
1139 ui_out_field_string (uiout
, "syms-read",
1140 so
->symbols_loaded
? "Yes" : "No");
1142 ui_out_field_string (uiout
, "name", so
->so_name
);
1144 ui_out_text (uiout
, "\n");
1146 do_cleanups (lib_cleanup
);
1149 do_cleanups (table_cleanup
);
1154 ui_out_message (uiout
, 0,
1155 _("No shared libraries matched.\n"));
1157 ui_out_message (uiout
, 0,
1158 _("No shared libraries loaded at this time.\n"));
1162 if (so_missing_debug_info
)
1163 ui_out_message (uiout
, 0,
1164 _("(*): Shared library is missing "
1165 "debugging information.\n"));
1169 /* Return 1 if ADDRESS lies within SOLIB. */
1172 solib_contains_address_p (const struct so_list
*const solib
,
1175 struct target_section
*p
;
1177 for (p
= solib
->sections
; p
< solib
->sections_end
; p
++)
1178 if (p
->addr
<= address
&& address
< p
->endaddr
)
1184 /* If ADDRESS is in a shared lib in program space PSPACE, return its
1187 Provides a hook for other gdb routines to discover whether or not a
1188 particular address is within the mapped address space of a shared
1191 For example, this routine is called at one point to disable
1192 breakpoints which are in shared libraries that are not currently
1196 solib_name_from_address (struct program_space
*pspace
, CORE_ADDR address
)
1198 struct so_list
*so
= NULL
;
1200 for (so
= pspace
->so_list
; so
; so
= so
->next
)
1201 if (solib_contains_address_p (so
, address
))
1202 return (so
->so_name
);
1207 /* Return whether the data starting at VADDR, size SIZE, must be kept
1208 in a core file for shared libraries loaded before "gcore" is used
1209 to be handled correctly when the core file is loaded. This only
1210 applies when the section would otherwise not be kept in the core
1211 file (in particular, for readonly sections). */
1214 solib_keep_data_in_core (CORE_ADDR vaddr
, unsigned long size
)
1216 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1218 if (ops
->keep_data_in_core
)
1219 return ops
->keep_data_in_core (vaddr
, size
);
1224 /* Called by free_all_symtabs */
1229 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1231 /* This function is expected to handle ELF shared libraries. It is
1232 also used on Solaris, which can run either ELF or a.out binaries
1233 (for compatibility with SunOS 4), both of which can use shared
1234 libraries. So we don't know whether we have an ELF executable or
1235 an a.out executable until the user chooses an executable file.
1237 ELF shared libraries don't get mapped into the address space
1238 until after the program starts, so we'd better not try to insert
1239 breakpoints in them immediately. We have to wait until the
1240 dynamic linker has loaded them; we'll hit a bp_shlib_event
1241 breakpoint (look for calls to create_solib_event_breakpoint) when
1244 SunOS shared libraries seem to be different --- they're present
1245 as soon as the process begins execution, so there's no need to
1246 put off inserting breakpoints. There's also nowhere to put a
1247 bp_shlib_event breakpoint, so if we put it off, we'll never get
1250 So: disable breakpoints only if we're using ELF shared libs. */
1251 if (exec_bfd
!= NULL
1252 && bfd_get_flavour (exec_bfd
) != bfd_target_aout_flavour
)
1253 disable_breakpoints_in_shlibs ();
1255 while (so_list_head
)
1257 struct so_list
*so
= so_list_head
;
1259 so_list_head
= so
->next
;
1260 observer_notify_solib_unloaded (so
);
1261 remove_target_sections (so
);
1265 ops
->clear_solib ();
1268 /* Shared library startup support. When GDB starts up the inferior,
1269 it nurses it along (through the shell) until it is ready to execute
1270 its first instruction. At this point, this function gets
1274 solib_create_inferior_hook (int from_tty
)
1276 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1278 ops
->solib_create_inferior_hook (from_tty
);
1281 /* Check to see if an address is in the dynamic loader's dynamic
1282 symbol resolution code. Return 1 if so, 0 otherwise. */
1285 in_solib_dynsym_resolve_code (CORE_ADDR pc
)
1287 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1289 return ops
->in_dynsym_resolve_code (pc
);
1292 /* Implements the "sharedlibrary" command. */
1295 sharedlibrary_command (char *args
, int from_tty
)
1298 solib_add (args
, from_tty
, (struct target_ops
*) 0, 1);
1301 /* Implements the command "nosharedlibrary", which discards symbols
1302 that have been auto-loaded from shared libraries. Symbols from
1303 shared libraries that were added by explicit request of the user
1304 are not discarded. Also called from remote.c. */
1307 no_shared_libraries (char *ignored
, int from_tty
)
1309 /* The order of the two routines below is important: clear_solib notifies
1310 the solib_unloaded observers, and some of these observers might need
1311 access to their associated objfiles. Therefore, we can not purge the
1312 solibs' objfiles before clear_solib has been called. */
1315 objfile_purge_solibs ();
1321 update_solib_breakpoints (void)
1323 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1325 if (ops
->update_breakpoints
!= NULL
)
1326 ops
->update_breakpoints ();
1332 handle_solib_event (void)
1334 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1336 if (ops
->handle_event
!= NULL
)
1337 ops
->handle_event ();
1339 clear_program_space_solib_cache (current_inferior ()->pspace
);
1341 /* Check for any newly added shared libraries if we're supposed to
1342 be adding them automatically. Switch terminal for any messages
1343 produced by breakpoint_re_set. */
1344 target_terminal_ours_for_output ();
1345 solib_add (NULL
, 0, ¤t_target
, auto_solib_add
);
1346 target_terminal_inferior ();
1349 /* Reload shared libraries, but avoid reloading the same symbol file
1350 we already have loaded. */
1353 reload_shared_libraries_1 (int from_tty
)
1356 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
1358 if (print_symbol_loading_p (from_tty
, 0, 0))
1359 printf_unfiltered (_("Loading symbols for shared libraries.\n"));
1361 for (so
= so_list_head
; so
!= NULL
; so
= so
->next
)
1363 char *filename
, *found_pathname
= NULL
;
1365 int was_loaded
= so
->symbols_loaded
;
1367 SYMFILE_DEFER_BP_RESET
| (from_tty
? SYMFILE_VERBOSE
: 0);
1369 filename
= tilde_expand (so
->so_original_name
);
1370 make_cleanup (xfree
, filename
);
1371 abfd
= solib_bfd_open (filename
);
1374 found_pathname
= xstrdup (bfd_get_filename (abfd
));
1375 make_cleanup (xfree
, found_pathname
);
1376 gdb_bfd_unref (abfd
);
1379 /* If this shared library is no longer associated with its previous
1380 symbol file, close that. */
1381 if ((found_pathname
== NULL
&& was_loaded
)
1382 || (found_pathname
!= NULL
1383 && filename_cmp (found_pathname
, so
->so_name
) != 0))
1385 if (so
->objfile
&& ! (so
->objfile
->flags
& OBJF_USERLOADED
)
1386 && !solib_used (so
))
1387 free_objfile (so
->objfile
);
1388 remove_target_sections (so
);
1392 /* If this shared library is now associated with a new symbol
1394 if (found_pathname
!= NULL
1396 || filename_cmp (found_pathname
, so
->so_name
) != 0))
1402 solib_map_sections (so
);
1405 CATCH (e
, RETURN_MASK_ERROR
)
1407 exception_fprintf (gdb_stderr
, e
,
1408 _("Error while mapping "
1409 "shared library sections:\n"));
1415 && (auto_solib_add
|| was_loaded
|| libpthread_solib_p (so
)))
1416 solib_read_symbols (so
, flags
);
1420 do_cleanups (old_chain
);
1424 reload_shared_libraries (char *ignored
, int from_tty
,
1425 struct cmd_list_element
*e
)
1427 const struct target_so_ops
*ops
;
1429 reload_shared_libraries_1 (from_tty
);
1431 ops
= solib_ops (target_gdbarch ());
1433 /* Creating inferior hooks here has two purposes. First, if we reload
1434 shared libraries then the address of solib breakpoint we've computed
1435 previously might be no longer valid. For example, if we forgot to set
1436 solib-absolute-prefix and are setting it right now, then the previous
1437 breakpoint address is plain wrong. Second, installing solib hooks
1438 also implicitly figures were ld.so is and loads symbols for it.
1439 Absent this call, if we've just connected to a target and set
1440 solib-absolute-prefix or solib-search-path, we'll lose all information
1442 if (target_has_execution
)
1444 /* Reset or free private data structures not associated with
1446 ops
->clear_solib ();
1448 /* Remove any previous solib event breakpoint. This is usually
1449 done in common code, at breakpoint_init_inferior time, but
1450 we're not really starting up the inferior here. */
1451 remove_solib_event_breakpoints ();
1453 solib_create_inferior_hook (from_tty
);
1456 /* Sometimes the platform-specific hook loads initial shared
1457 libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be
1458 incorrectly 0 but such solib targets should be fixed anyway. If we
1459 made all the inferior hook methods consistent, this call could be
1460 removed. Call it only after the solib target has been initialized by
1461 solib_create_inferior_hook. */
1463 solib_add (NULL
, 0, NULL
, auto_solib_add
);
1465 breakpoint_re_set ();
1467 /* We may have loaded or unloaded debug info for some (or all)
1468 shared libraries. However, frames may still reference them. For
1469 example, a frame's unwinder might still point at DWARF FDE
1470 structures that are now freed. Also, getting new symbols may
1471 change our opinion about what is frameless. */
1472 reinit_frame_cache ();
1474 ops
->special_symbol_handling ();
1477 /* Wrapper for reload_shared_libraries that replaces "remote:"
1478 at the start of gdb_sysroot with "target:". */
1481 gdb_sysroot_changed (char *ignored
, int from_tty
,
1482 struct cmd_list_element
*e
)
1484 const char *old_prefix
= "remote:";
1485 const char *new_prefix
= TARGET_SYSROOT_PREFIX
;
1487 if (startswith (gdb_sysroot
, old_prefix
))
1489 static int warning_issued
= 0;
1491 gdb_assert (strlen (old_prefix
) == strlen (new_prefix
));
1492 memcpy (gdb_sysroot
, new_prefix
, strlen (new_prefix
));
1494 if (!warning_issued
)
1496 warning (_("\"%s\" is deprecated, use \"%s\" instead."),
1497 old_prefix
, new_prefix
);
1498 warning (_("sysroot set to \"%s\"."), gdb_sysroot
);
1504 reload_shared_libraries (ignored
, from_tty
, e
);
1508 show_auto_solib_add (struct ui_file
*file
, int from_tty
,
1509 struct cmd_list_element
*c
, const char *value
)
1511 fprintf_filtered (file
, _("Autoloading of shared library symbols is %s.\n"),
1516 /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call
1517 the library-specific handler if it is installed for the current target. */
1520 solib_global_lookup (struct objfile
*objfile
,
1522 const domain_enum domain
)
1524 const struct target_so_ops
*ops
= solib_ops (get_objfile_arch (objfile
));
1526 if (ops
->lookup_lib_global_symbol
!= NULL
)
1527 return ops
->lookup_lib_global_symbol (objfile
, name
, domain
);
1531 /* Lookup the value for a specific symbol from dynamic symbol table. Look
1532 up symbol from ABFD. MATCH_SYM is a callback function to determine
1533 whether to pick up a symbol. DATA is the input of this callback
1534 function. Return NULL if symbol is not found. */
1537 gdb_bfd_lookup_symbol_from_symtab (bfd
*abfd
,
1538 int (*match_sym
) (asymbol
*, void *),
1541 long storage_needed
= bfd_get_symtab_upper_bound (abfd
);
1542 CORE_ADDR symaddr
= 0;
1544 if (storage_needed
> 0)
1548 asymbol
**symbol_table
= (asymbol
**) xmalloc (storage_needed
);
1549 struct cleanup
*back_to
= make_cleanup (xfree
, symbol_table
);
1550 unsigned int number_of_symbols
=
1551 bfd_canonicalize_symtab (abfd
, symbol_table
);
1553 for (i
= 0; i
< number_of_symbols
; i
++)
1555 asymbol
*sym
= *symbol_table
++;
1557 if (match_sym (sym
, data
))
1559 struct gdbarch
*gdbarch
= target_gdbarch ();
1560 symaddr
= sym
->value
;
1562 /* Some ELF targets fiddle with addresses of symbols they
1563 consider special. They use minimal symbols to do that
1564 and this is needed for correct breakpoint placement,
1565 but we do not have full data here to build a complete
1566 minimal symbol, so just set the address and let the
1567 targets cope with that. */
1568 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1569 && gdbarch_elf_make_msymbol_special_p (gdbarch
))
1571 struct minimal_symbol msym
;
1573 memset (&msym
, 0, sizeof (msym
));
1574 SET_MSYMBOL_VALUE_ADDRESS (&msym
, symaddr
);
1575 gdbarch_elf_make_msymbol_special (gdbarch
, sym
, &msym
);
1576 symaddr
= MSYMBOL_VALUE_RAW_ADDRESS (&msym
);
1579 /* BFD symbols are section relative. */
1580 symaddr
+= sym
->section
->vma
;
1584 do_cleanups (back_to
);
1590 /* Lookup the value for a specific symbol from symbol table. Look up symbol
1591 from ABFD. MATCH_SYM is a callback function to determine whether to pick
1592 up a symbol. DATA is the input of this callback function. Return NULL
1593 if symbol is not found. */
1596 bfd_lookup_symbol_from_dyn_symtab (bfd
*abfd
,
1597 int (*match_sym
) (asymbol
*, void *),
1600 long storage_needed
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1601 CORE_ADDR symaddr
= 0;
1603 if (storage_needed
> 0)
1606 asymbol
**symbol_table
= (asymbol
**) xmalloc (storage_needed
);
1607 struct cleanup
*back_to
= make_cleanup (xfree
, symbol_table
);
1608 unsigned int number_of_symbols
=
1609 bfd_canonicalize_dynamic_symtab (abfd
, symbol_table
);
1611 for (i
= 0; i
< number_of_symbols
; i
++)
1613 asymbol
*sym
= *symbol_table
++;
1615 if (match_sym (sym
, data
))
1617 /* BFD symbols are section relative. */
1618 symaddr
= sym
->value
+ sym
->section
->vma
;
1622 do_cleanups (back_to
);
1627 /* Lookup the value for a specific symbol from symbol table and dynamic
1628 symbol table. Look up symbol from ABFD. MATCH_SYM is a callback
1629 function to determine whether to pick up a symbol. DATA is the
1630 input of this callback function. Return NULL if symbol is not
1634 gdb_bfd_lookup_symbol (bfd
*abfd
,
1635 int (*match_sym
) (asymbol
*, void *),
1638 CORE_ADDR symaddr
= gdb_bfd_lookup_symbol_from_symtab (abfd
, match_sym
, data
);
1640 /* On FreeBSD, the dynamic linker is stripped by default. So we'll
1641 have to check the dynamic string table too. */
1643 symaddr
= bfd_lookup_symbol_from_dyn_symtab (abfd
, match_sym
, data
);
1648 /* SO_LIST_HEAD may contain user-loaded object files that can be removed
1649 out-of-band by the user. So upon notification of free_objfile remove
1650 all references to any user-loaded file that is about to be freed. */
1653 remove_user_added_objfile (struct objfile
*objfile
)
1657 if (objfile
!= 0 && objfile
->flags
& OBJF_USERLOADED
)
1659 for (so
= so_list_head
; so
!= NULL
; so
= so
->next
)
1660 if (so
->objfile
== objfile
)
1665 extern initialize_file_ftype _initialize_solib
; /* -Wmissing-prototypes */
1668 _initialize_solib (void)
1670 solib_data
= gdbarch_data_register_pre_init (solib_init
);
1672 observer_attach_free_objfile (remove_user_added_objfile
);
1674 add_com ("sharedlibrary", class_files
, sharedlibrary_command
,
1675 _("Load shared object library symbols for files matching REGEXP."));
1676 add_info ("sharedlibrary", info_sharedlibrary_command
,
1677 _("Status of loaded shared object libraries."));
1678 add_info_alias ("dll", "sharedlibrary", 1);
1679 add_com ("nosharedlibrary", class_files
, no_shared_libraries
,
1680 _("Unload all shared object library symbols."));
1682 add_setshow_boolean_cmd ("auto-solib-add", class_support
,
1683 &auto_solib_add
, _("\
1684 Set autoloading of shared library symbols."), _("\
1685 Show autoloading of shared library symbols."), _("\
1686 If \"on\", symbols from all shared object libraries will be loaded\n\
1687 automatically when the inferior begins execution, when the dynamic linker\n\
1688 informs gdb that a new library has been loaded, or when attaching to the\n\
1689 inferior. Otherwise, symbols must be loaded manually, using \
1692 show_auto_solib_add
,
1693 &setlist
, &showlist
);
1695 add_setshow_optional_filename_cmd ("sysroot", class_support
,
1697 Set an alternate system root."), _("\
1698 Show the current system root."), _("\
1699 The system root is used to load absolute shared library symbol files.\n\
1700 For other (relative) files, you can add directories using\n\
1701 `set solib-search-path'."),
1702 gdb_sysroot_changed
,
1704 &setlist
, &showlist
);
1706 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1708 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1711 add_setshow_optional_filename_cmd ("solib-search-path", class_support
,
1712 &solib_search_path
, _("\
1713 Set the search path for loading non-absolute shared library symbol files."),
1715 Show the search path for loading non-absolute shared library symbol files."),
1717 This takes precedence over the environment variables \
1718 PATH and LD_LIBRARY_PATH."),
1719 reload_shared_libraries
,
1720 show_solib_search_path
,
1721 &setlist
, &showlist
);