1 /* Handle shared libraries for GDB, the GNU Debugger.
3 Copyright (C) 1990-2018 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
69 = (const struct target_so_ops
**) gdbarch_data (gdbarch
, solib_data
);
74 /* Set the solib operations for GDBARCH to NEW_OPS. */
77 set_solib_ops (struct gdbarch
*gdbarch
, const struct target_so_ops
*new_ops
)
79 const struct target_so_ops
**ops
80 = (const struct target_so_ops
**) gdbarch_data (gdbarch
, solib_data
);
86 /* external data declarations */
88 /* FIXME: gdbarch needs to control this variable, or else every
89 configuration needs to call set_solib_ops. */
90 struct target_so_ops
*current_target_so_ops
;
92 /* Local function prototypes */
94 /* If non-empty, this is a search path for loading non-absolute shared library
95 symbol files. This takes precedence over the environment variables PATH
96 and LD_LIBRARY_PATH. */
97 static char *solib_search_path
= NULL
;
99 show_solib_search_path (struct ui_file
*file
, int from_tty
,
100 struct cmd_list_element
*c
, const char *value
)
102 fprintf_filtered (file
, _("The search path for loading non-absolute "
103 "shared library symbol files is %s.\n"),
107 /* Same as HAVE_DOS_BASED_FILE_SYSTEM, but useable as an rvalue. */
108 #if (HAVE_DOS_BASED_FILE_SYSTEM)
109 # define DOS_BASED_FILE_SYSTEM 1
111 # define DOS_BASED_FILE_SYSTEM 0
114 /* Return the full pathname of a binary file (the main executable
115 or a shared library file), or NULL if not found. The returned
116 pathname is malloc'ed and must be freed by the caller. If FD
117 is non-NULL, *FD is set to either -1 or an open file handle for
120 Global variable GDB_SYSROOT is used as a prefix directory
121 to search for binary files if they have an absolute path.
122 If GDB_SYSROOT starts with "target:" and target filesystem
123 is the local filesystem then the "target:" prefix will be
124 stripped before the search starts. This ensures that the
125 same search algorithm is used for local files regardless of
126 whether a "target:" prefix was used.
128 Global variable SOLIB_SEARCH_PATH is used as a prefix directory
129 (or set of directories, as in LD_LIBRARY_PATH) to search for all
130 shared libraries if not found in either the sysroot (if set) or
131 the local filesystem. SOLIB_SEARCH_PATH is not used when searching
132 for the main executable.
135 * If a sysroot is set and path is absolute:
136 * Search for sysroot/path.
138 * Look for it literally (unmodified).
139 * If IS_SOLIB is non-zero:
140 * Look in SOLIB_SEARCH_PATH.
141 * If available, use target defined search function.
142 * If NO sysroot is set, perform the following two searches:
143 * Look in inferior's $PATH.
144 * If IS_SOLIB is non-zero:
145 * Look in inferior's $LD_LIBRARY_PATH.
147 * The last check avoids doing this search when targetting remote
148 * machines since a sysroot will almost always be set.
152 solib_find_1 (const char *in_pathname
, int *fd
, int is_solib
)
154 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
156 char *temp_pathname
= NULL
;
157 const char *fskind
= effective_target_file_system_kind ();
158 const char *sysroot
= gdb_sysroot
;
159 int prefix_len
, orig_prefix_len
;
161 /* If the absolute prefix starts with "target:" but the filesystem
162 accessed by the target_fileio_* methods is the local filesystem
163 then we strip the "target:" prefix now and work with the local
164 filesystem. This ensures that the same search algorithm is used
165 for all local files regardless of whether a "target:" prefix was
167 if (is_target_filename (sysroot
) && target_filesystem_is_local ())
168 sysroot
+= strlen (TARGET_SYSROOT_PREFIX
);
170 /* Strip any trailing slashes from the absolute prefix. */
171 prefix_len
= orig_prefix_len
= strlen (sysroot
);
173 while (prefix_len
> 0 && IS_DIR_SEPARATOR (sysroot
[prefix_len
- 1]))
176 std::string sysroot_holder
;
179 else if (prefix_len
!= orig_prefix_len
)
181 sysroot_holder
= std::string (sysroot
, prefix_len
);
182 sysroot
= sysroot_holder
.c_str ();
185 /* If we're on a non-DOS-based system, backslashes won't be
186 understood as directory separator, so, convert them to forward
187 slashes, iff we're supposed to handle DOS-based file system
188 semantics for target paths. */
189 if (!DOS_BASED_FILE_SYSTEM
&& fskind
== file_system_kind_dos_based
)
193 /* Avoid clobbering our input. */
194 p
= (char *) alloca (strlen (in_pathname
) + 1);
195 strcpy (p
, in_pathname
);
205 /* Note, we're interested in IS_TARGET_ABSOLUTE_PATH, not
206 IS_ABSOLUTE_PATH. The latter is for host paths only, while
207 IN_PATHNAME is a target path. For example, if we're supposed to
208 be handling DOS-like semantics we want to consider a
209 'c:/foo/bar.dll' path as an absolute path, even on a Unix box.
210 With such a path, before giving up on the sysroot, we'll try:
212 1st attempt, c:/foo/bar.dll ==> /sysroot/c:/foo/bar.dll
213 2nd attempt, c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll
214 3rd attempt, c:/foo/bar.dll ==> /sysroot/foo/bar.dll
217 if (!IS_TARGET_ABSOLUTE_PATH (fskind
, in_pathname
) || sysroot
== NULL
)
218 temp_pathname
= xstrdup (in_pathname
);
221 int need_dir_separator
;
223 /* Concatenate the sysroot and the target reported filename. We
224 may need to glue them with a directory separator. Cases to
227 | sysroot | separator | in_pathname |
228 |-----------------+-----------+----------------|
229 | /some/dir | / | c:/foo/bar.dll |
230 | /some/dir | | /foo/bar.dll |
231 | target: | | c:/foo/bar.dll |
232 | target: | | /foo/bar.dll |
233 | target:some/dir | / | c:/foo/bar.dll |
234 | target:some/dir | | /foo/bar.dll |
236 IOW, we don't need to add a separator if IN_PATHNAME already
237 has one, or when the the sysroot is exactly "target:".
238 There's no need to check for drive spec explicitly, as we only
239 get here if IN_PATHNAME is considered an absolute path. */
240 need_dir_separator
= !(IS_DIR_SEPARATOR (in_pathname
[0])
241 || strcmp (TARGET_SYSROOT_PREFIX
, sysroot
) == 0);
243 /* Cat the prefixed pathname together. */
244 temp_pathname
= concat (sysroot
,
245 need_dir_separator
? SLASH_STRING
: "",
246 in_pathname
, (char *) NULL
);
249 /* Handle files to be accessed via the target. */
250 if (is_target_filename (temp_pathname
))
254 return temp_pathname
;
257 /* Now see if we can open it. */
258 found_file
= gdb_open_cloexec (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
260 xfree (temp_pathname
);
262 /* If the search in gdb_sysroot failed, and the path name has a
263 drive spec (e.g, c:/foo), try stripping ':' from the drive spec,
264 and retrying in the sysroot:
265 c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll. */
269 && HAS_TARGET_DRIVE_SPEC (fskind
, in_pathname
))
271 int need_dir_separator
= !IS_DIR_SEPARATOR (in_pathname
[2]);
272 char *drive
= savestring (in_pathname
, 1);
274 temp_pathname
= concat (sysroot
,
277 need_dir_separator
? SLASH_STRING
: "",
278 in_pathname
+ 2, (char *) NULL
);
281 found_file
= gdb_open_cloexec (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
284 xfree (temp_pathname
);
286 /* If the search in gdb_sysroot still failed, try fully
287 stripping the drive spec, and trying once more in the
288 sysroot before giving up.
290 c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */
292 temp_pathname
= concat (sysroot
,
293 need_dir_separator
? SLASH_STRING
: "",
294 in_pathname
+ 2, (char *) NULL
);
296 found_file
= gdb_open_cloexec (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
298 xfree (temp_pathname
);
302 /* We try to find the library in various ways. After each attempt,
303 either found_file >= 0 and temp_pathname is a malloc'd string, or
304 found_file < 0 and temp_pathname does not point to storage that
305 needs to be freed. */
308 temp_pathname
= NULL
;
310 /* If the search in gdb_sysroot failed, and the path name is
311 absolute at this point, make it relative. (openp will try and open the
312 file according to its absolute path otherwise, which is not what we want.)
313 Affects subsequent searches for this solib. */
314 if (found_file
< 0 && IS_TARGET_ABSOLUTE_PATH (fskind
, in_pathname
))
316 /* First, get rid of any drive letters etc. */
317 while (!IS_TARGET_DIR_SEPARATOR (fskind
, *in_pathname
))
320 /* Next, get rid of all leading dir separators. */
321 while (IS_TARGET_DIR_SEPARATOR (fskind
, *in_pathname
))
325 /* If not found, and we're looking for a solib, search the
326 solib_search_path (if any). */
327 if (is_solib
&& found_file
< 0 && solib_search_path
!= NULL
)
328 found_file
= openp (solib_search_path
,
329 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
330 in_pathname
, O_RDONLY
| O_BINARY
, &temp_pathname
);
332 /* If not found, and we're looking for a solib, next search the
333 solib_search_path (if any) for the basename only (ignoring the
334 path). This is to allow reading solibs from a path that differs
335 from the opened path. */
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 target_lbasename (fskind
, in_pathname
),
340 O_RDONLY
| O_BINARY
, &temp_pathname
);
342 /* If not found, and we're looking for a solib, try to use target
343 supplied solib search method. */
344 if (is_solib
&& found_file
< 0 && ops
->find_and_open_solib
)
345 found_file
= ops
->find_and_open_solib (in_pathname
, O_RDONLY
| O_BINARY
,
348 /* If not found, next search the inferior's $PATH environment variable. */
349 if (found_file
< 0 && sysroot
== NULL
)
350 found_file
= openp (current_inferior ()->environment
.get ("PATH"),
351 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
, in_pathname
,
352 O_RDONLY
| O_BINARY
, &temp_pathname
);
354 /* If not found, and we're looking for a solib, next search the
355 inferior's $LD_LIBRARY_PATH environment variable. */
356 if (is_solib
&& found_file
< 0 && sysroot
== NULL
)
357 found_file
= openp (current_inferior ()->environment
.get
359 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
, in_pathname
,
360 O_RDONLY
| O_BINARY
, &temp_pathname
);
370 return temp_pathname
;
373 /* Return the full pathname of the main executable, or NULL if not
374 found. The returned pathname is malloc'ed and must be freed by
375 the caller. If FD is non-NULL, *FD is set to either -1 or an open
376 file handle for the main executable. */
379 exec_file_find (const char *in_pathname
, int *fd
)
382 const char *fskind
= effective_target_file_system_kind ();
384 if (in_pathname
== NULL
)
387 if (*gdb_sysroot
!= '\0' && IS_TARGET_ABSOLUTE_PATH (fskind
, in_pathname
))
389 result
= solib_find_1 (in_pathname
, fd
, 0);
391 if (result
== NULL
&& fskind
== file_system_kind_dos_based
)
395 new_pathname
= (char *) alloca (strlen (in_pathname
) + 5);
396 strcpy (new_pathname
, in_pathname
);
397 strcat (new_pathname
, ".exe");
399 result
= solib_find_1 (new_pathname
, fd
, 0);
404 /* It's possible we don't have a full path, but rather just a
405 filename. Some targets, such as HP-UX, don't provide the
408 Attempt to qualify the filename against the source path.
409 (If that fails, we'll just fall back on the original
410 filename. Not much more we can do...) */
412 if (!source_full_path_of (in_pathname
, &result
))
413 result
= xstrdup (in_pathname
);
421 /* Return the full pathname of a shared library file, or NULL if not
422 found. The returned pathname is malloc'ed and must be freed by
423 the caller. If FD is non-NULL, *FD is set to either -1 or an open
424 file handle for the shared library.
426 The search algorithm used is described in solib_find_1's comment
430 solib_find (const char *in_pathname
, int *fd
)
432 const char *solib_symbols_extension
433 = gdbarch_solib_symbols_extension (target_gdbarch ());
435 /* If solib_symbols_extension is set, replace the file's
437 if (solib_symbols_extension
!= NULL
)
439 const char *p
= in_pathname
+ strlen (in_pathname
);
441 while (p
> in_pathname
&& *p
!= '.')
449 = (char *) alloca (p
- in_pathname
+ 1
450 + strlen (solib_symbols_extension
) + 1);
451 memcpy (new_pathname
, in_pathname
, p
- in_pathname
+ 1);
452 strcpy (new_pathname
+ (p
- in_pathname
) + 1,
453 solib_symbols_extension
);
455 in_pathname
= new_pathname
;
459 return solib_find_1 (in_pathname
, fd
, 1);
462 /* Open and return a BFD for the shared library PATHNAME. If FD is not -1,
463 it is used as file handle to open the file. Throws an error if the file
464 could not be opened. Handles both local and remote file access.
466 PATHNAME must be malloc'ed by the caller. It will be freed by this
467 function. If unsuccessful, the FD will be closed (unless FD was
471 solib_bfd_fopen (char *pathname
, int fd
)
473 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (pathname
, gnutarget
, fd
));
475 if (abfd
!= NULL
&& !gdb_bfd_has_target_filename (abfd
.get ()))
476 bfd_set_cacheable (abfd
.get (), 1);
480 /* Arrange to free PATHNAME when the error is thrown. */
481 gdb::unique_xmalloc_ptr
<char> free_pathname (pathname
);
482 error (_("Could not open `%s' as an executable file: %s"),
483 pathname
, bfd_errmsg (bfd_get_error ()));
491 /* Find shared library PATHNAME and open a BFD for it. */
494 solib_bfd_open (char *pathname
)
496 char *found_pathname
;
498 const struct bfd_arch_info
*b
;
500 /* Search for shared library file. */
501 found_pathname
= solib_find (pathname
, &found_file
);
502 if (found_pathname
== NULL
)
504 /* Return failure if the file could not be found, so that we can
505 accumulate messages about missing libraries. */
509 perror_with_name (pathname
);
512 /* Open bfd for shared library. */
513 gdb_bfd_ref_ptr
abfd (solib_bfd_fopen (found_pathname
, found_file
));
515 /* Check bfd format. */
516 if (!bfd_check_format (abfd
.get (), bfd_object
))
517 error (_("`%s': not in executable format: %s"),
518 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
520 /* Check bfd arch. */
521 b
= gdbarch_bfd_arch_info (target_gdbarch ());
522 if (!b
->compatible (b
, bfd_get_arch_info (abfd
.get ())))
523 warning (_("`%s': Shared library architecture %s is not compatible "
524 "with target architecture %s."), bfd_get_filename (abfd
),
525 bfd_get_arch_info (abfd
.get ())->printable_name
,
531 /* Given a pointer to one of the shared objects in our list of mapped
532 objects, use the recorded name to open a bfd descriptor for the
533 object, build a section table, relocate all the section addresses
534 by the base address at which the shared object was mapped, and then
535 add the sections to the target's section table.
537 FIXME: In most (all?) cases the shared object file name recorded in
538 the dynamic linkage tables will be a fully qualified pathname. For
539 cases where it isn't, do we really mimic the systems search
540 mechanism correctly in the below code (particularly the tilde
541 expansion stuff?). */
544 solib_map_sections (struct so_list
*so
)
546 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
547 struct target_section
*p
;
549 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (so
->so_name
));
550 gdb_bfd_ref_ptr
abfd (ops
->bfd_open (filename
.get ()));
555 /* Leave bfd open, core_xfer_memory and "info files" need it. */
556 so
->abfd
= abfd
.release ();
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 (so
->abfd
)) >= SO_NAME_MAX_PATH_SIZE
)
565 error (_("Shared library file name is too long."));
566 strcpy (so
->so_name
, bfd_get_filename (so
->abfd
));
568 if (build_section_table (so
->abfd
, &so
->sections
, &so
->sections_end
))
570 error (_("Can't find the file sections in `%s': %s"),
571 bfd_get_filename (so
->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
, symfile_add_flags 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
)
703 sap
= build_section_addr_info_from_section_table (so
->sections
,
705 so
->objfile
= symbol_file_add_from_bfd (so
->abfd
, so
->so_name
,
706 flags
, sap
, OBJF_SHARED
,
708 so
->objfile
->addr_low
= so
->addr_low
;
709 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
)
745 update_solib_list (int from_tty
)
747 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
748 struct so_list
*inferior
= ops
->current_sos();
749 struct so_list
*gdb
, **gdb_link
;
751 /* We can reach here due to changing solib-search-path or the
752 sysroot, before having any inferior. */
753 if (target_has_execution
&& !ptid_equal (inferior_ptid
, null_ptid
))
755 struct inferior
*inf
= current_inferior ();
757 /* If we are attaching to a running process for which we
758 have not opened a symbol file, we may be able to get its
760 if (inf
->attach_flag
&& symfile_objfile
== NULL
)
764 ops
->open_symbol_file_object (from_tty
);
766 CATCH (ex
, RETURN_MASK_ALL
)
768 exception_fprintf (gdb_stderr
, ex
,
769 "Error reading attached "
770 "process's symbol file.\n");
776 /* GDB and the inferior's dynamic linker each maintain their own
777 list of currently loaded shared objects; we want to bring the
778 former in sync with the latter. Scan both lists, seeing which
779 shared objects appear where. There are three cases:
781 - A shared object appears on both lists. This means that GDB
782 knows about it already, and it's still loaded in the inferior.
783 Nothing needs to happen.
785 - A shared object appears only on GDB's list. This means that
786 the inferior has unloaded it. We should remove the shared
787 object from GDB's tables.
789 - A shared object appears only on the inferior's list. This
790 means that it's just been loaded. We should add it to GDB's
793 So we walk GDB's list, checking each entry to see if it appears
794 in the inferior's list too. If it does, no action is needed, and
795 we remove it from the inferior's list. If it doesn't, the
796 inferior has unloaded it, and we remove it from GDB's list. By
797 the time we're done walking GDB's list, the inferior's list
798 contains only the new shared objects, which we then add. */
801 gdb_link
= &so_list_head
;
804 struct so_list
*i
= inferior
;
805 struct so_list
**i_link
= &inferior
;
807 /* Check to see whether the shared object *gdb also appears in
808 the inferior's current list. */
813 if (ops
->same (gdb
, i
))
818 if (! filename_cmp (gdb
->so_original_name
, i
->so_original_name
))
826 /* If the shared object appears on the inferior's list too, then
827 it's still loaded, so we don't need to do anything. Delete
828 it from the inferior's list, and leave it on GDB's list. */
833 gdb_link
= &gdb
->next
;
837 /* If it's not on the inferior's list, remove it from GDB's tables. */
840 /* Notify any observer that the shared object has been
841 unloaded before we remove it from GDB's tables. */
842 observer_notify_solib_unloaded (gdb
);
844 VEC_safe_push (char_ptr
, current_program_space
->deleted_solibs
,
845 xstrdup (gdb
->so_name
));
847 *gdb_link
= gdb
->next
;
849 /* Unless the user loaded it explicitly, free SO's objfile. */
850 if (gdb
->objfile
&& ! (gdb
->objfile
->flags
& OBJF_USERLOADED
)
851 && !solib_used (gdb
))
854 /* Some targets' section tables might be referring to
855 sections from so->abfd; remove them. */
856 remove_target_sections (gdb
);
863 /* Now the inferior's list contains only shared objects that don't
864 appear in GDB's list --- those that are newly loaded. Add them
865 to GDB's shared object list. */
869 const char *not_found_filename
= NULL
;
873 /* Add the new shared objects to GDB's list. */
874 *gdb_link
= inferior
;
876 /* Fill in the rest of each of the `struct so_list' nodes. */
877 for (i
= inferior
; i
; i
= i
->next
)
880 i
->pspace
= current_program_space
;
881 VEC_safe_push (so_list_ptr
, current_program_space
->added_solibs
, i
);
885 /* Fill in the rest of the `struct so_list' node. */
886 if (!solib_map_sections (i
))
889 if (not_found_filename
== NULL
)
890 not_found_filename
= i
->so_original_name
;
894 CATCH (e
, RETURN_MASK_ERROR
)
896 exception_fprintf (gdb_stderr
, e
,
897 _("Error while mapping shared "
898 "library sections:\n"));
902 /* Notify any observer that the shared object has been
903 loaded now that we've added it to GDB's tables. */
904 observer_notify_solib_loaded (i
);
907 /* If a library was not found, issue an appropriate warning
908 message. We have to use a single call to warning in case the
909 front end does something special with warnings, e.g., pop up
910 a dialog box. It Would Be Nice if we could get a "warning: "
911 prefix on each line in the CLI front end, though - it doesn't
915 warning (_("Could not load shared library symbols for %s.\n"
916 "Do you need \"set solib-search-path\" "
917 "or \"set sysroot\"?"),
919 else if (not_found
> 1)
921 Could not load shared library symbols for %d libraries, e.g. %s.\n\
922 Use the \"info sharedlibrary\" command to see the complete listing.\n\
923 Do you need \"set solib-search-path\" or \"set sysroot\"?"),
924 not_found
, not_found_filename
);
929 /* Return non-zero if NAME is the libpthread shared library.
931 Uses a fairly simplistic heuristic approach where we check
932 the file name against "/libpthread". This can lead to false
933 positives, but this should be good enough in practice. */
936 libpthread_name_p (const char *name
)
938 return (strstr (name
, "/libpthread") != NULL
);
941 /* Return non-zero if SO is the libpthread shared library. */
944 libpthread_solib_p (struct so_list
*so
)
946 return libpthread_name_p (so
->so_name
);
949 /* Read in symbolic information for any shared objects whose names
950 match PATTERN. (If we've already read a shared object's symbol
951 info, leave it alone.) If PATTERN is zero, read them all.
953 If READSYMS is 0, defer reading symbolic information until later
954 but still do any needed low level processing.
956 FROM_TTY is described for update_solib_list, above. */
959 solib_add (const char *pattern
, int from_tty
, int readsyms
)
963 if (print_symbol_loading_p (from_tty
, 0, 0))
967 printf_unfiltered (_("Loading symbols for shared libraries: %s\n"),
971 printf_unfiltered (_("Loading symbols for shared libraries.\n"));
974 current_program_space
->solib_add_generation
++;
978 char *re_err
= re_comp (pattern
);
981 error (_("Invalid regexp: %s"), re_err
);
984 update_solib_list (from_tty
);
986 /* Walk the list of currently loaded shared libraries, and read
987 symbols for any that match the pattern --- or any whose symbols
988 aren't already loaded, if no pattern was given. */
991 int loaded_any_symbols
= 0;
992 symfile_add_flags add_flags
= SYMFILE_DEFER_BP_RESET
;
995 add_flags
|= SYMFILE_VERBOSE
;
997 for (gdb
= so_list_head
; gdb
; gdb
= gdb
->next
)
998 if (! pattern
|| re_exec (gdb
->so_name
))
1000 /* Normally, we would read the symbols from that library
1001 only if READSYMS is set. However, we're making a small
1002 exception for the pthread library, because we sometimes
1003 need the library symbols to be loaded in order to provide
1004 thread support (x86-linux for instance). */
1005 const int add_this_solib
=
1006 (readsyms
|| libpthread_solib_p (gdb
));
1011 if (gdb
->symbols_loaded
)
1013 /* If no pattern was given, be quiet for shared
1014 libraries we have already loaded. */
1015 if (pattern
&& (from_tty
|| info_verbose
))
1016 printf_unfiltered (_("Symbols already loaded for %s\n"),
1019 else if (solib_read_symbols (gdb
, add_flags
))
1020 loaded_any_symbols
= 1;
1024 if (loaded_any_symbols
)
1025 breakpoint_re_set ();
1027 if (from_tty
&& pattern
&& ! any_matches
)
1029 ("No loaded shared libraries match the pattern `%s'.\n", pattern
);
1031 if (loaded_any_symbols
)
1033 /* Getting new symbols may change our opinion about what is
1035 reinit_frame_cache ();
1040 /* Implement the "info sharedlibrary" command. Walk through the
1041 shared library list and print information about each attached
1042 library matching PATTERN. If PATTERN is elided, print them
1046 info_sharedlibrary_command (const char *pattern
, int from_tty
)
1048 struct so_list
*so
= NULL
; /* link map state variable */
1049 int so_missing_debug_info
= 0;
1052 struct gdbarch
*gdbarch
= target_gdbarch ();
1053 struct ui_out
*uiout
= current_uiout
;
1057 char *re_err
= re_comp (pattern
);
1060 error (_("Invalid regexp: %s"), re_err
);
1063 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
1064 addr_width
= 4 + (gdbarch_ptr_bit (gdbarch
) / 4);
1066 update_solib_list (from_tty
);
1068 /* ui_out_emit_table table_emitter needs to know the number of rows,
1069 so we need to make two passes over the libs. */
1071 for (nr_libs
= 0, so
= so_list_head
; so
; so
= so
->next
)
1075 if (pattern
&& ! re_exec (so
->so_name
))
1082 ui_out_emit_table
table_emitter (uiout
, 4, nr_libs
, "SharedLibraryTable");
1084 /* The "- 1" is because ui_out adds one space between columns. */
1085 uiout
->table_header (addr_width
- 1, ui_left
, "from", "From");
1086 uiout
->table_header (addr_width
- 1, ui_left
, "to", "To");
1087 uiout
->table_header (12 - 1, ui_left
, "syms-read", "Syms Read");
1088 uiout
->table_header (0, ui_noalign
, "name", "Shared Object Library");
1090 uiout
->table_body ();
1094 if (! so
->so_name
[0])
1096 if (pattern
&& ! re_exec (so
->so_name
))
1099 ui_out_emit_tuple
tuple_emitter (uiout
, "lib");
1101 if (so
->addr_high
!= 0)
1103 uiout
->field_core_addr ("from", gdbarch
, so
->addr_low
);
1104 uiout
->field_core_addr ("to", gdbarch
, so
->addr_high
);
1108 uiout
->field_skip ("from");
1109 uiout
->field_skip ("to");
1112 if (! interp_ui_out (top_level_interpreter ())->is_mi_like_p ()
1113 && so
->symbols_loaded
1114 && !objfile_has_symbols (so
->objfile
))
1116 so_missing_debug_info
= 1;
1117 uiout
->field_string ("syms-read", "Yes (*)");
1120 uiout
->field_string ("syms-read", so
->symbols_loaded
? "Yes" : "No");
1122 uiout
->field_string ("name", so
->so_name
);
1131 uiout
->message (_("No shared libraries matched.\n"));
1133 uiout
->message (_("No shared libraries loaded at this time.\n"));
1137 if (so_missing_debug_info
)
1138 uiout
->message (_("(*): Shared library is missing "
1139 "debugging information.\n"));
1143 /* Return 1 if ADDRESS lies within SOLIB. */
1146 solib_contains_address_p (const struct so_list
*const solib
,
1149 struct target_section
*p
;
1151 for (p
= solib
->sections
; p
< solib
->sections_end
; p
++)
1152 if (p
->addr
<= address
&& address
< p
->endaddr
)
1158 /* If ADDRESS is in a shared lib in program space PSPACE, return its
1161 Provides a hook for other gdb routines to discover whether or not a
1162 particular address is within the mapped address space of a shared
1165 For example, this routine is called at one point to disable
1166 breakpoints which are in shared libraries that are not currently
1170 solib_name_from_address (struct program_space
*pspace
, CORE_ADDR address
)
1172 struct so_list
*so
= NULL
;
1174 for (so
= pspace
->so_list
; so
; so
= so
->next
)
1175 if (solib_contains_address_p (so
, address
))
1176 return (so
->so_name
);
1181 /* Return whether the data starting at VADDR, size SIZE, must be kept
1182 in a core file for shared libraries loaded before "gcore" is used
1183 to be handled correctly when the core file is loaded. This only
1184 applies when the section would otherwise not be kept in the core
1185 file (in particular, for readonly sections). */
1188 solib_keep_data_in_core (CORE_ADDR vaddr
, unsigned long size
)
1190 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1192 if (ops
->keep_data_in_core
)
1193 return ops
->keep_data_in_core (vaddr
, size
);
1198 /* Called by free_all_symtabs */
1203 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1205 disable_breakpoints_in_shlibs ();
1207 while (so_list_head
)
1209 struct so_list
*so
= so_list_head
;
1211 so_list_head
= so
->next
;
1212 observer_notify_solib_unloaded (so
);
1213 remove_target_sections (so
);
1217 ops
->clear_solib ();
1220 /* Shared library startup support. When GDB starts up the inferior,
1221 it nurses it along (through the shell) until it is ready to execute
1222 its first instruction. At this point, this function gets
1226 solib_create_inferior_hook (int from_tty
)
1228 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1230 ops
->solib_create_inferior_hook (from_tty
);
1233 /* Check to see if an address is in the dynamic loader's dynamic
1234 symbol resolution code. Return 1 if so, 0 otherwise. */
1237 in_solib_dynsym_resolve_code (CORE_ADDR pc
)
1239 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1241 return ops
->in_dynsym_resolve_code (pc
);
1244 /* Implements the "sharedlibrary" command. */
1247 sharedlibrary_command (const char *args
, int from_tty
)
1250 solib_add (args
, from_tty
, 1);
1253 /* Implements the command "nosharedlibrary", which discards symbols
1254 that have been auto-loaded from shared libraries. Symbols from
1255 shared libraries that were added by explicit request of the user
1256 are not discarded. Also called from remote.c. */
1259 no_shared_libraries (const char *ignored
, int from_tty
)
1261 /* The order of the two routines below is important: clear_solib notifies
1262 the solib_unloaded observers, and some of these observers might need
1263 access to their associated objfiles. Therefore, we can not purge the
1264 solibs' objfiles before clear_solib has been called. */
1267 objfile_purge_solibs ();
1273 update_solib_breakpoints (void)
1275 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1277 if (ops
->update_breakpoints
!= NULL
)
1278 ops
->update_breakpoints ();
1284 handle_solib_event (void)
1286 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1288 if (ops
->handle_event
!= NULL
)
1289 ops
->handle_event ();
1291 clear_program_space_solib_cache (current_inferior ()->pspace
);
1293 /* Check for any newly added shared libraries if we're supposed to
1294 be adding them automatically. Switch terminal for any messages
1295 produced by breakpoint_re_set. */
1296 target_terminal::ours_for_output ();
1297 solib_add (NULL
, 0, auto_solib_add
);
1298 target_terminal::inferior ();
1301 /* Reload shared libraries, but avoid reloading the same symbol file
1302 we already have loaded. */
1305 reload_shared_libraries_1 (int from_tty
)
1309 if (print_symbol_loading_p (from_tty
, 0, 0))
1310 printf_unfiltered (_("Loading symbols for shared libraries.\n"));
1312 for (so
= so_list_head
; so
!= NULL
; so
= so
->next
)
1314 char *found_pathname
= NULL
;
1315 int was_loaded
= so
->symbols_loaded
;
1316 symfile_add_flags add_flags
= SYMFILE_DEFER_BP_RESET
;
1319 add_flags
|= SYMFILE_VERBOSE
;
1321 gdb::unique_xmalloc_ptr
<char> filename
1322 (tilde_expand (so
->so_original_name
));
1323 gdb_bfd_ref_ptr
abfd (solib_bfd_open (filename
.get ()));
1325 found_pathname
= bfd_get_filename (abfd
.get ());
1327 /* If this shared library is no longer associated with its previous
1328 symbol file, close that. */
1329 if ((found_pathname
== NULL
&& was_loaded
)
1330 || (found_pathname
!= NULL
1331 && filename_cmp (found_pathname
, so
->so_name
) != 0))
1333 if (so
->objfile
&& ! (so
->objfile
->flags
& OBJF_USERLOADED
)
1334 && !solib_used (so
))
1336 remove_target_sections (so
);
1340 /* If this shared library is now associated with a new symbol
1342 if (found_pathname
!= NULL
1344 || filename_cmp (found_pathname
, so
->so_name
) != 0))
1350 solib_map_sections (so
);
1353 CATCH (e
, RETURN_MASK_ERROR
)
1355 exception_fprintf (gdb_stderr
, e
,
1356 _("Error while mapping "
1357 "shared library sections:\n"));
1363 && (auto_solib_add
|| was_loaded
|| libpthread_solib_p (so
)))
1364 solib_read_symbols (so
, add_flags
);
1370 reload_shared_libraries (const char *ignored
, int from_tty
,
1371 struct cmd_list_element
*e
)
1373 const struct target_so_ops
*ops
;
1375 reload_shared_libraries_1 (from_tty
);
1377 ops
= solib_ops (target_gdbarch ());
1379 /* Creating inferior hooks here has two purposes. First, if we reload
1380 shared libraries then the address of solib breakpoint we've computed
1381 previously might be no longer valid. For example, if we forgot to set
1382 solib-absolute-prefix and are setting it right now, then the previous
1383 breakpoint address is plain wrong. Second, installing solib hooks
1384 also implicitly figures were ld.so is and loads symbols for it.
1385 Absent this call, if we've just connected to a target and set
1386 solib-absolute-prefix or solib-search-path, we'll lose all information
1388 if (target_has_execution
)
1390 /* Reset or free private data structures not associated with
1392 ops
->clear_solib ();
1394 /* Remove any previous solib event breakpoint. This is usually
1395 done in common code, at breakpoint_init_inferior time, but
1396 we're not really starting up the inferior here. */
1397 remove_solib_event_breakpoints ();
1399 solib_create_inferior_hook (from_tty
);
1402 /* Sometimes the platform-specific hook loads initial shared
1403 libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be
1404 incorrectly 0 but such solib targets should be fixed anyway. If we
1405 made all the inferior hook methods consistent, this call could be
1406 removed. Call it only after the solib target has been initialized by
1407 solib_create_inferior_hook. */
1409 solib_add (NULL
, 0, auto_solib_add
);
1411 breakpoint_re_set ();
1413 /* We may have loaded or unloaded debug info for some (or all)
1414 shared libraries. However, frames may still reference them. For
1415 example, a frame's unwinder might still point at DWARF FDE
1416 structures that are now freed. Also, getting new symbols may
1417 change our opinion about what is frameless. */
1418 reinit_frame_cache ();
1421 /* Wrapper for reload_shared_libraries that replaces "remote:"
1422 at the start of gdb_sysroot with "target:". */
1425 gdb_sysroot_changed (const char *ignored
, int from_tty
,
1426 struct cmd_list_element
*e
)
1428 const char *old_prefix
= "remote:";
1429 const char *new_prefix
= TARGET_SYSROOT_PREFIX
;
1431 if (startswith (gdb_sysroot
, old_prefix
))
1433 static int warning_issued
= 0;
1435 gdb_assert (strlen (old_prefix
) == strlen (new_prefix
));
1436 memcpy (gdb_sysroot
, new_prefix
, strlen (new_prefix
));
1438 if (!warning_issued
)
1440 warning (_("\"%s\" is deprecated, use \"%s\" instead."),
1441 old_prefix
, new_prefix
);
1442 warning (_("sysroot set to \"%s\"."), gdb_sysroot
);
1448 reload_shared_libraries (ignored
, from_tty
, e
);
1452 show_auto_solib_add (struct ui_file
*file
, int from_tty
,
1453 struct cmd_list_element
*c
, const char *value
)
1455 fprintf_filtered (file
, _("Autoloading of shared library symbols is %s.\n"),
1460 /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call
1461 the library-specific handler if it is installed for the current target. */
1464 solib_global_lookup (struct objfile
*objfile
,
1466 const domain_enum domain
)
1468 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1470 if (ops
->lookup_lib_global_symbol
!= NULL
)
1471 return ops
->lookup_lib_global_symbol (objfile
, name
, domain
);
1472 return (struct block_symbol
) {NULL
, NULL
};
1475 /* Lookup the value for a specific symbol from dynamic symbol table. Look
1476 up symbol from ABFD. MATCH_SYM is a callback function to determine
1477 whether to pick up a symbol. DATA is the input of this callback
1478 function. Return NULL if symbol is not found. */
1481 gdb_bfd_lookup_symbol_from_symtab (bfd
*abfd
,
1482 int (*match_sym
) (const asymbol
*,
1486 long storage_needed
= bfd_get_symtab_upper_bound (abfd
);
1487 CORE_ADDR symaddr
= 0;
1489 if (storage_needed
> 0)
1493 asymbol
**symbol_table
= (asymbol
**) xmalloc (storage_needed
);
1494 struct cleanup
*back_to
= make_cleanup (xfree
, symbol_table
);
1495 unsigned int number_of_symbols
=
1496 bfd_canonicalize_symtab (abfd
, symbol_table
);
1498 for (i
= 0; i
< number_of_symbols
; i
++)
1500 asymbol
*sym
= *symbol_table
++;
1502 if (match_sym (sym
, data
))
1504 struct gdbarch
*gdbarch
= target_gdbarch ();
1505 symaddr
= sym
->value
;
1507 /* Some ELF targets fiddle with addresses of symbols they
1508 consider special. They use minimal symbols to do that
1509 and this is needed for correct breakpoint placement,
1510 but we do not have full data here to build a complete
1511 minimal symbol, so just set the address and let the
1512 targets cope with that. */
1513 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1514 && gdbarch_elf_make_msymbol_special_p (gdbarch
))
1516 struct minimal_symbol msym
;
1518 memset (&msym
, 0, sizeof (msym
));
1519 SET_MSYMBOL_VALUE_ADDRESS (&msym
, symaddr
);
1520 gdbarch_elf_make_msymbol_special (gdbarch
, sym
, &msym
);
1521 symaddr
= MSYMBOL_VALUE_RAW_ADDRESS (&msym
);
1524 /* BFD symbols are section relative. */
1525 symaddr
+= sym
->section
->vma
;
1529 do_cleanups (back_to
);
1535 /* Lookup the value for a specific symbol from symbol table. Look up symbol
1536 from ABFD. MATCH_SYM is a callback function to determine whether to pick
1537 up a symbol. DATA is the input of this callback function. Return NULL
1538 if symbol is not found. */
1541 bfd_lookup_symbol_from_dyn_symtab (bfd
*abfd
,
1542 int (*match_sym
) (const asymbol
*,
1546 long storage_needed
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1547 CORE_ADDR symaddr
= 0;
1549 if (storage_needed
> 0)
1552 asymbol
**symbol_table
= (asymbol
**) xmalloc (storage_needed
);
1553 struct cleanup
*back_to
= make_cleanup (xfree
, symbol_table
);
1554 unsigned int number_of_symbols
=
1555 bfd_canonicalize_dynamic_symtab (abfd
, symbol_table
);
1557 for (i
= 0; i
< number_of_symbols
; i
++)
1559 asymbol
*sym
= *symbol_table
++;
1561 if (match_sym (sym
, data
))
1563 /* BFD symbols are section relative. */
1564 symaddr
= sym
->value
+ sym
->section
->vma
;
1568 do_cleanups (back_to
);
1573 /* Lookup the value for a specific symbol from symbol table and dynamic
1574 symbol table. Look up symbol from ABFD. MATCH_SYM is a callback
1575 function to determine whether to pick up a symbol. DATA is the
1576 input of this callback function. Return NULL if symbol is not
1580 gdb_bfd_lookup_symbol (bfd
*abfd
,
1581 int (*match_sym
) (const asymbol
*, const void *),
1584 CORE_ADDR symaddr
= gdb_bfd_lookup_symbol_from_symtab (abfd
, match_sym
, data
);
1586 /* On FreeBSD, the dynamic linker is stripped by default. So we'll
1587 have to check the dynamic string table too. */
1589 symaddr
= bfd_lookup_symbol_from_dyn_symtab (abfd
, match_sym
, data
);
1594 /* SO_LIST_HEAD may contain user-loaded object files that can be removed
1595 out-of-band by the user. So upon notification of free_objfile remove
1596 all references to any user-loaded file that is about to be freed. */
1599 remove_user_added_objfile (struct objfile
*objfile
)
1603 if (objfile
!= 0 && objfile
->flags
& OBJF_USERLOADED
)
1605 for (so
= so_list_head
; so
!= NULL
; so
= so
->next
)
1606 if (so
->objfile
== objfile
)
1612 _initialize_solib (void)
1614 solib_data
= gdbarch_data_register_pre_init (solib_init
);
1616 observer_attach_free_objfile (remove_user_added_objfile
);
1618 add_com ("sharedlibrary", class_files
, sharedlibrary_command
,
1619 _("Load shared object library symbols for files matching REGEXP."));
1620 add_info ("sharedlibrary", info_sharedlibrary_command
,
1621 _("Status of loaded shared object libraries."));
1622 add_info_alias ("dll", "sharedlibrary", 1);
1623 add_com ("nosharedlibrary", class_files
, no_shared_libraries
,
1624 _("Unload all shared object library symbols."));
1626 add_setshow_boolean_cmd ("auto-solib-add", class_support
,
1627 &auto_solib_add
, _("\
1628 Set autoloading of shared library symbols."), _("\
1629 Show autoloading of shared library symbols."), _("\
1630 If \"on\", symbols from all shared object libraries will be loaded\n\
1631 automatically when the inferior begins execution, when the dynamic linker\n\
1632 informs gdb that a new library has been loaded, or when attaching to the\n\
1633 inferior. Otherwise, symbols must be loaded manually, using \
1636 show_auto_solib_add
,
1637 &setlist
, &showlist
);
1639 add_setshow_optional_filename_cmd ("sysroot", class_support
,
1641 Set an alternate system root."), _("\
1642 Show the current system root."), _("\
1643 The system root is used to load absolute shared library symbol files.\n\
1644 For other (relative) files, you can add directories using\n\
1645 `set solib-search-path'."),
1646 gdb_sysroot_changed
,
1648 &setlist
, &showlist
);
1650 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1652 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1655 add_setshow_optional_filename_cmd ("solib-search-path", class_support
,
1656 &solib_search_path
, _("\
1657 Set the search path for loading non-absolute shared library symbol files."),
1659 Show the search path for loading non-absolute shared library symbol files."),
1661 This takes precedence over the environment variables \
1662 PATH and LD_LIBRARY_PATH."),
1663 reload_shared_libraries
,
1664 show_solib_search_path
,
1665 &setlist
, &showlist
);