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"
51 /* Architecture-specific operations. */
53 /* Per-architecture data key. */
54 static struct gdbarch_data
*solib_data
;
57 solib_init (struct obstack
*obstack
)
59 struct target_so_ops
**ops
;
61 ops
= OBSTACK_ZALLOC (obstack
, struct target_so_ops
*);
62 *ops
= current_target_so_ops
;
66 static const struct target_so_ops
*
67 solib_ops (struct gdbarch
*gdbarch
)
69 const struct target_so_ops
**ops
70 = (const struct target_so_ops
**) gdbarch_data (gdbarch
, solib_data
);
75 /* Set the solib operations for GDBARCH to NEW_OPS. */
78 set_solib_ops (struct gdbarch
*gdbarch
, const struct target_so_ops
*new_ops
)
80 const struct target_so_ops
**ops
81 = (const struct target_so_ops
**) gdbarch_data (gdbarch
, solib_data
);
87 /* external data declarations */
89 /* FIXME: gdbarch needs to control this variable, or else every
90 configuration needs to call set_solib_ops. */
91 struct target_so_ops
*current_target_so_ops
;
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 or a
116 shared library file), or NULL if not found. If FD is non-NULL, *FD
117 is set to either -1 or an open file handle for the binary file.
119 Global variable GDB_SYSROOT is used as a prefix directory
120 to search for binary files if they have an absolute path.
121 If GDB_SYSROOT starts with "target:" and target filesystem
122 is the local filesystem then the "target:" prefix will be
123 stripped before the search starts. This ensures that the
124 same search algorithm is used for local files regardless of
125 whether a "target:" prefix was used.
127 Global variable SOLIB_SEARCH_PATH is used as a prefix directory
128 (or set of directories, as in LD_LIBRARY_PATH) to search for all
129 shared libraries if not found in either the sysroot (if set) or
130 the local filesystem. SOLIB_SEARCH_PATH is not used when searching
131 for the main executable.
134 * If a sysroot is set and path is absolute:
135 * Search for sysroot/path.
137 * Look for it literally (unmodified).
138 * If IS_SOLIB is non-zero:
139 * Look in SOLIB_SEARCH_PATH.
140 * If available, use target defined search function.
141 * If NO sysroot is set, perform the following two searches:
142 * Look in inferior's $PATH.
143 * If IS_SOLIB is non-zero:
144 * Look in inferior's $LD_LIBRARY_PATH.
146 * The last check avoids doing this search when targetting remote
147 * machines since a sysroot will almost always be set.
150 static gdb::unique_xmalloc_ptr
<char>
151 solib_find_1 (const char *in_pathname
, int *fd
, int is_solib
)
153 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
155 char *temp_pathname
= NULL
;
156 const char *fskind
= effective_target_file_system_kind ();
157 const char *sysroot
= gdb_sysroot
;
158 int prefix_len
, orig_prefix_len
;
160 /* If the absolute prefix starts with "target:" but the filesystem
161 accessed by the target_fileio_* methods is the local filesystem
162 then we strip the "target:" prefix now and work with the local
163 filesystem. This ensures that the same search algorithm is used
164 for all local files regardless of whether a "target:" prefix was
166 if (is_target_filename (sysroot
) && target_filesystem_is_local ())
167 sysroot
+= strlen (TARGET_SYSROOT_PREFIX
);
169 /* Strip any trailing slashes from the absolute prefix. */
170 prefix_len
= orig_prefix_len
= strlen (sysroot
);
172 while (prefix_len
> 0 && IS_DIR_SEPARATOR (sysroot
[prefix_len
- 1]))
175 std::string sysroot_holder
;
178 else if (prefix_len
!= orig_prefix_len
)
180 sysroot_holder
= std::string (sysroot
, prefix_len
);
181 sysroot
= sysroot_holder
.c_str ();
184 /* If we're on a non-DOS-based system, backslashes won't be
185 understood as directory separator, so, convert them to forward
186 slashes, iff we're supposed to handle DOS-based file system
187 semantics for target paths. */
188 if (!DOS_BASED_FILE_SYSTEM
&& fskind
== file_system_kind_dos_based
)
192 /* Avoid clobbering our input. */
193 p
= (char *) alloca (strlen (in_pathname
) + 1);
194 strcpy (p
, in_pathname
);
204 /* Note, we're interested in IS_TARGET_ABSOLUTE_PATH, not
205 IS_ABSOLUTE_PATH. The latter is for host paths only, while
206 IN_PATHNAME is a target path. For example, if we're supposed to
207 be handling DOS-like semantics we want to consider a
208 'c:/foo/bar.dll' path as an absolute path, even on a Unix box.
209 With such a path, before giving up on the sysroot, we'll try:
211 1st attempt, c:/foo/bar.dll ==> /sysroot/c:/foo/bar.dll
212 2nd attempt, c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll
213 3rd attempt, c:/foo/bar.dll ==> /sysroot/foo/bar.dll
216 if (!IS_TARGET_ABSOLUTE_PATH (fskind
, in_pathname
) || sysroot
== NULL
)
217 temp_pathname
= xstrdup (in_pathname
);
220 int need_dir_separator
;
222 /* Concatenate the sysroot and the target reported filename. We
223 may need to glue them with a directory separator. Cases to
226 | sysroot | separator | in_pathname |
227 |-----------------+-----------+----------------|
228 | /some/dir | / | c:/foo/bar.dll |
229 | /some/dir | | /foo/bar.dll |
230 | target: | | c:/foo/bar.dll |
231 | target: | | /foo/bar.dll |
232 | target:some/dir | / | c:/foo/bar.dll |
233 | target:some/dir | | /foo/bar.dll |
235 IOW, we don't need to add a separator if IN_PATHNAME already
236 has one, or when the the sysroot is exactly "target:".
237 There's no need to check for drive spec explicitly, as we only
238 get here if IN_PATHNAME is considered an absolute path. */
239 need_dir_separator
= !(IS_DIR_SEPARATOR (in_pathname
[0])
240 || strcmp (TARGET_SYSROOT_PREFIX
, sysroot
) == 0);
242 /* Cat the prefixed pathname together. */
243 temp_pathname
= concat (sysroot
,
244 need_dir_separator
? SLASH_STRING
: "",
245 in_pathname
, (char *) NULL
);
248 /* Handle files to be accessed via the target. */
249 if (is_target_filename (temp_pathname
))
253 return gdb::unique_xmalloc_ptr
<char> (temp_pathname
);
256 /* Now see if we can open it. */
257 found_file
= gdb_open_cloexec (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
259 xfree (temp_pathname
);
261 /* If the search in gdb_sysroot failed, and the path name has a
262 drive spec (e.g, c:/foo), try stripping ':' from the drive spec,
263 and retrying in the sysroot:
264 c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll. */
268 && HAS_TARGET_DRIVE_SPEC (fskind
, in_pathname
))
270 int need_dir_separator
= !IS_DIR_SEPARATOR (in_pathname
[2]);
271 char *drive
= savestring (in_pathname
, 1);
273 temp_pathname
= concat (sysroot
,
276 need_dir_separator
? SLASH_STRING
: "",
277 in_pathname
+ 2, (char *) NULL
);
280 found_file
= gdb_open_cloexec (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
283 xfree (temp_pathname
);
285 /* If the search in gdb_sysroot still failed, try fully
286 stripping the drive spec, and trying once more in the
287 sysroot before giving up.
289 c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */
291 temp_pathname
= concat (sysroot
,
292 need_dir_separator
? SLASH_STRING
: "",
293 in_pathname
+ 2, (char *) NULL
);
295 found_file
= gdb_open_cloexec (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
297 xfree (temp_pathname
);
301 /* We try to find the library in various ways. After each attempt,
302 either found_file >= 0 and temp_pathname is a malloc'd string, or
303 found_file < 0 and temp_pathname does not point to storage that
304 needs to be freed. */
307 temp_pathname
= NULL
;
309 /* If the search in gdb_sysroot failed, and the path name is
310 absolute at this point, make it relative. (openp will try and open the
311 file according to its absolute path otherwise, which is not what we want.)
312 Affects subsequent searches for this solib. */
313 if (found_file
< 0 && IS_TARGET_ABSOLUTE_PATH (fskind
, in_pathname
))
315 /* First, get rid of any drive letters etc. */
316 while (!IS_TARGET_DIR_SEPARATOR (fskind
, *in_pathname
))
319 /* Next, get rid of all leading dir separators. */
320 while (IS_TARGET_DIR_SEPARATOR (fskind
, *in_pathname
))
324 /* If not found, and we're looking for a solib, search the
325 solib_search_path (if any). */
326 if (is_solib
&& found_file
< 0 && solib_search_path
!= NULL
)
327 found_file
= openp (solib_search_path
,
328 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
329 in_pathname
, O_RDONLY
| O_BINARY
, &temp_pathname
);
331 /* If not found, and we're looking for a solib, next search the
332 solib_search_path (if any) for the basename only (ignoring the
333 path). This is to allow reading solibs from a path that differs
334 from the opened path. */
335 if (is_solib
&& found_file
< 0 && solib_search_path
!= NULL
)
336 found_file
= openp (solib_search_path
,
337 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
338 target_lbasename (fskind
, in_pathname
),
339 O_RDONLY
| O_BINARY
, &temp_pathname
);
341 /* If not found, and we're looking for a solib, try to use target
342 supplied solib search method. */
343 if (is_solib
&& found_file
< 0 && ops
->find_and_open_solib
)
344 found_file
= ops
->find_and_open_solib (in_pathname
, O_RDONLY
| O_BINARY
,
347 /* If not found, next search the inferior's $PATH environment variable. */
348 if (found_file
< 0 && sysroot
== NULL
)
349 found_file
= openp (current_inferior ()->environment
.get ("PATH"),
350 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
, in_pathname
,
351 O_RDONLY
| O_BINARY
, &temp_pathname
);
353 /* If not found, and we're looking for a solib, next search the
354 inferior's $LD_LIBRARY_PATH environment variable. */
355 if (is_solib
&& found_file
< 0 && sysroot
== NULL
)
356 found_file
= openp (current_inferior ()->environment
.get
358 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
, in_pathname
,
359 O_RDONLY
| O_BINARY
, &temp_pathname
);
369 return gdb::unique_xmalloc_ptr
<char> (temp_pathname
);
372 /* Return the full pathname of the main executable, or NULL if not
373 found. If FD is non-NULL, *FD is set to either -1 or an open file
374 handle for the main executable. */
376 gdb::unique_xmalloc_ptr
<char>
377 exec_file_find (const char *in_pathname
, int *fd
)
379 gdb::unique_xmalloc_ptr
<char> result
;
380 const char *fskind
= effective_target_file_system_kind ();
382 if (in_pathname
== NULL
)
385 if (*gdb_sysroot
!= '\0' && IS_TARGET_ABSOLUTE_PATH (fskind
, in_pathname
))
387 result
= solib_find_1 (in_pathname
, fd
, 0);
389 if (result
== NULL
&& fskind
== file_system_kind_dos_based
)
393 new_pathname
= (char *) alloca (strlen (in_pathname
) + 5);
394 strcpy (new_pathname
, in_pathname
);
395 strcat (new_pathname
, ".exe");
397 result
= solib_find_1 (new_pathname
, fd
, 0);
402 /* It's possible we don't have a full path, but rather just a
403 filename. Some targets, such as HP-UX, don't provide the
406 Attempt to qualify the filename against the source path.
407 (If that fails, we'll just fall back on the original
408 filename. Not much more we can do...) */
410 char *full_path
= NULL
;
411 if (source_full_path_of (in_pathname
, &full_path
))
412 result
.reset (full_path
);
414 result
.reset (xstrdup (in_pathname
));
422 /* Return the full pathname of a shared library file, or NULL if not
423 found. If FD is non-NULL, *FD is set to either -1 or an open file
424 handle for the shared library.
426 The search algorithm used is described in solib_find_1's comment
429 gdb::unique_xmalloc_ptr
<char>
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 If unsuccessful, the FD will be closed (unless FD was -1). */
469 solib_bfd_fopen (const char *pathname
, int fd
)
471 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (pathname
, gnutarget
, fd
));
473 if (abfd
!= NULL
&& !gdb_bfd_has_target_filename (abfd
.get ()))
474 bfd_set_cacheable (abfd
.get (), 1);
478 /* Arrange to free PATHNAME when the error is thrown. */
479 error (_("Could not open `%s' as an executable file: %s"),
480 pathname
, bfd_errmsg (bfd_get_error ()));
486 /* Find shared library PATHNAME and open a BFD for it. */
489 solib_bfd_open (char *pathname
)
492 const struct bfd_arch_info
*b
;
494 /* Search for shared library file. */
495 gdb::unique_xmalloc_ptr
<char> found_pathname
496 = solib_find (pathname
, &found_file
);
497 if (found_pathname
== NULL
)
499 /* Return failure if the file could not be found, so that we can
500 accumulate messages about missing libraries. */
504 perror_with_name (pathname
);
507 /* Open bfd for shared library. */
508 gdb_bfd_ref_ptr
abfd (solib_bfd_fopen (found_pathname
.get (), found_file
));
510 /* Check bfd format. */
511 if (!bfd_check_format (abfd
.get (), bfd_object
))
512 error (_("`%s': not in executable format: %s"),
513 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
515 /* Check bfd arch. */
516 b
= gdbarch_bfd_arch_info (target_gdbarch ());
517 if (!b
->compatible (b
, bfd_get_arch_info (abfd
.get ())))
518 warning (_("`%s': Shared library architecture %s is not compatible "
519 "with target architecture %s."), bfd_get_filename (abfd
),
520 bfd_get_arch_info (abfd
.get ())->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 ());
542 struct target_section
*p
;
544 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (so
->so_name
));
545 gdb_bfd_ref_ptr
abfd (ops
->bfd_open (filename
.get ()));
550 /* Leave bfd open, core_xfer_memory and "info files" need it. */
551 so
->abfd
= abfd
.release ();
553 /* Copy the full path name into so_name, allowing symbol_file_add
554 to find it later. This also affects the =library-loaded GDB/MI
555 event, and in particular the part of that notification providing
556 the library's host-side path. If we let the target dictate
557 that objfile's path, and the target is different from the host,
558 GDB/MI will not provide the correct host-side path. */
559 if (strlen (bfd_get_filename (so
->abfd
)) >= SO_NAME_MAX_PATH_SIZE
)
560 error (_("Shared library file name is too long."));
561 strcpy (so
->so_name
, bfd_get_filename (so
->abfd
));
563 if (build_section_table (so
->abfd
, &so
->sections
, &so
->sections_end
))
565 error (_("Can't find the file sections in `%s': %s"),
566 bfd_get_filename (so
->abfd
), bfd_errmsg (bfd_get_error ()));
569 for (p
= so
->sections
; p
< so
->sections_end
; p
++)
571 /* Relocate the section binding addresses as recorded in the shared
572 object's file by the base address to which the object was actually
574 ops
->relocate_section_addresses (so
, p
);
576 /* If the target didn't provide information about the address
577 range of the shared object, assume we want the location of
578 the .text section. */
579 if (so
->addr_low
== 0 && so
->addr_high
== 0
580 && strcmp (p
->the_bfd_section
->name
, ".text") == 0)
582 so
->addr_low
= p
->addr
;
583 so
->addr_high
= p
->endaddr
;
587 /* Add the shared object's sections to the current set of file
588 section tables. Do this immediately after mapping the object so
589 that later nodes in the list can query this object, as is needed
591 add_target_sections (so
, so
->sections
, so
->sections_end
);
596 /* Free symbol-file related contents of SO and reset for possible reloading
597 of SO. If we have opened a BFD for SO, close it. If we have placed SO's
598 sections in some target's section table, the caller is responsible for
601 This function doesn't mess with objfiles at all. If there is an
602 objfile associated with SO that needs to be removed, the caller is
603 responsible for taking care of that. */
606 clear_so (struct so_list
*so
)
608 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
612 xfree (so
->sections
);
613 so
->sections
= so
->sections_end
= NULL
;
616 gdb_bfd_unref (so
->abfd
);
619 /* Our caller closed the objfile, possibly via objfile_purge_solibs. */
620 so
->symbols_loaded
= 0;
623 so
->addr_low
= so
->addr_high
= 0;
625 /* Restore the target-supplied file name. SO_NAME may be the path
626 of the symbol file. */
627 strcpy (so
->so_name
, so
->so_original_name
);
629 /* Do the same for target-specific data. */
630 if (ops
->clear_so
!= NULL
)
634 /* Free the storage associated with the `struct so_list' object SO.
635 If we have opened a BFD for SO, close it.
637 The caller is responsible for removing SO from whatever list it is
638 a member of. If we have placed SO's sections in some target's
639 section table, the caller is responsible for removing them.
641 This function doesn't mess with objfiles at all. If there is an
642 objfile associated with SO that needs to be removed, the caller is
643 responsible for taking care of that. */
646 free_so (struct so_list
*so
)
648 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
657 /* Return address of first so_list entry in master shared object list. */
659 master_so_list (void)
664 /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS,
665 be chatty about it. Return non-zero if any symbols were actually
669 solib_read_symbols (struct so_list
*so
, symfile_add_flags flags
)
671 if (so
->symbols_loaded
)
673 /* If needed, we've already warned in our caller. */
675 else if (so
->abfd
== NULL
)
677 /* We've already warned about this library, when trying to open
683 flags
|= current_inferior ()->symfile_flags
;
687 struct section_addr_info
*sap
;
689 /* Have we already loaded this shared object? */
690 ALL_OBJFILES (so
->objfile
)
692 if (filename_cmp (objfile_name (so
->objfile
), so
->so_name
) == 0
693 && so
->objfile
->addr_low
== so
->addr_low
)
696 if (so
->objfile
== NULL
)
698 sap
= build_section_addr_info_from_section_table (so
->sections
,
700 so
->objfile
= symbol_file_add_from_bfd (so
->abfd
, so
->so_name
,
701 flags
, sap
, OBJF_SHARED
,
703 so
->objfile
->addr_low
= so
->addr_low
;
704 free_section_addr_info (sap
);
707 so
->symbols_loaded
= 1;
709 CATCH (e
, RETURN_MASK_ERROR
)
711 exception_fprintf (gdb_stderr
, e
, _("Error while reading shared"
712 " library symbols for %s:\n"),
723 /* Return 1 if KNOWN->objfile is used by any other so_list object in the
724 SO_LIST_HEAD list. Return 0 otherwise. */
727 solib_used (const struct so_list
*const known
)
729 const struct so_list
*pivot
;
731 for (pivot
= so_list_head
; pivot
!= NULL
; pivot
= pivot
->next
)
732 if (pivot
!= known
&& pivot
->objfile
== known
->objfile
)
740 update_solib_list (int from_tty
)
742 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
743 struct so_list
*inferior
= ops
->current_sos();
744 struct so_list
*gdb
, **gdb_link
;
746 /* We can reach here due to changing solib-search-path or the
747 sysroot, before having any inferior. */
748 if (target_has_execution
&& !ptid_equal (inferior_ptid
, null_ptid
))
750 struct inferior
*inf
= current_inferior ();
752 /* If we are attaching to a running process for which we
753 have not opened a symbol file, we may be able to get its
755 if (inf
->attach_flag
&& symfile_objfile
== NULL
)
759 ops
->open_symbol_file_object (from_tty
);
761 CATCH (ex
, RETURN_MASK_ALL
)
763 exception_fprintf (gdb_stderr
, ex
,
764 "Error reading attached "
765 "process's symbol file.\n");
771 /* GDB and the inferior's dynamic linker each maintain their own
772 list of currently loaded shared objects; we want to bring the
773 former in sync with the latter. Scan both lists, seeing which
774 shared objects appear where. There are three cases:
776 - A shared object appears on both lists. This means that GDB
777 knows about it already, and it's still loaded in the inferior.
778 Nothing needs to happen.
780 - A shared object appears only on GDB's list. This means that
781 the inferior has unloaded it. We should remove the shared
782 object from GDB's tables.
784 - A shared object appears only on the inferior's list. This
785 means that it's just been loaded. We should add it to GDB's
788 So we walk GDB's list, checking each entry to see if it appears
789 in the inferior's list too. If it does, no action is needed, and
790 we remove it from the inferior's list. If it doesn't, the
791 inferior has unloaded it, and we remove it from GDB's list. By
792 the time we're done walking GDB's list, the inferior's list
793 contains only the new shared objects, which we then add. */
796 gdb_link
= &so_list_head
;
799 struct so_list
*i
= inferior
;
800 struct so_list
**i_link
= &inferior
;
802 /* Check to see whether the shared object *gdb also appears in
803 the inferior's current list. */
808 if (ops
->same (gdb
, i
))
813 if (! filename_cmp (gdb
->so_original_name
, i
->so_original_name
))
821 /* If the shared object appears on the inferior's list too, then
822 it's still loaded, so we don't need to do anything. Delete
823 it from the inferior's list, and leave it on GDB's list. */
828 gdb_link
= &gdb
->next
;
832 /* If it's not on the inferior's list, remove it from GDB's tables. */
835 /* Notify any observer that the shared object has been
836 unloaded before we remove it from GDB's tables. */
837 observer_notify_solib_unloaded (gdb
);
839 VEC_safe_push (char_ptr
, current_program_space
->deleted_solibs
,
840 xstrdup (gdb
->so_name
));
842 *gdb_link
= gdb
->next
;
844 /* Unless the user loaded it explicitly, free SO's objfile. */
845 if (gdb
->objfile
&& ! (gdb
->objfile
->flags
& OBJF_USERLOADED
)
846 && !solib_used (gdb
))
849 /* Some targets' section tables might be referring to
850 sections from so->abfd; remove them. */
851 remove_target_sections (gdb
);
858 /* Now the inferior's list contains only shared objects that don't
859 appear in GDB's list --- those that are newly loaded. Add them
860 to GDB's shared object list. */
864 const char *not_found_filename
= NULL
;
868 /* Add the new shared objects to GDB's list. */
869 *gdb_link
= inferior
;
871 /* Fill in the rest of each of the `struct so_list' nodes. */
872 for (i
= inferior
; i
; i
= i
->next
)
875 i
->pspace
= current_program_space
;
876 VEC_safe_push (so_list_ptr
, current_program_space
->added_solibs
, i
);
880 /* Fill in the rest of the `struct so_list' node. */
881 if (!solib_map_sections (i
))
884 if (not_found_filename
== NULL
)
885 not_found_filename
= i
->so_original_name
;
889 CATCH (e
, RETURN_MASK_ERROR
)
891 exception_fprintf (gdb_stderr
, e
,
892 _("Error while mapping shared "
893 "library sections:\n"));
897 /* Notify any observer that the shared object has been
898 loaded now that we've added it to GDB's tables. */
899 observer_notify_solib_loaded (i
);
902 /* If a library was not found, issue an appropriate warning
903 message. We have to use a single call to warning in case the
904 front end does something special with warnings, e.g., pop up
905 a dialog box. It Would Be Nice if we could get a "warning: "
906 prefix on each line in the CLI front end, though - it doesn't
910 warning (_("Could not load shared library symbols for %s.\n"
911 "Do you need \"set solib-search-path\" "
912 "or \"set sysroot\"?"),
914 else if (not_found
> 1)
916 Could not load shared library symbols for %d libraries, e.g. %s.\n\
917 Use the \"info sharedlibrary\" command to see the complete listing.\n\
918 Do you need \"set solib-search-path\" or \"set sysroot\"?"),
919 not_found
, not_found_filename
);
924 /* Return non-zero if NAME is the libpthread shared library.
926 Uses a fairly simplistic heuristic approach where we check
927 the file name against "/libpthread". This can lead to false
928 positives, but this should be good enough in practice. */
931 libpthread_name_p (const char *name
)
933 return (strstr (name
, "/libpthread") != NULL
);
936 /* Return non-zero if SO is the libpthread shared library. */
939 libpthread_solib_p (struct so_list
*so
)
941 return libpthread_name_p (so
->so_name
);
944 /* Read in symbolic information for any shared objects whose names
945 match PATTERN. (If we've already read a shared object's symbol
946 info, leave it alone.) If PATTERN is zero, read them all.
948 If READSYMS is 0, defer reading symbolic information until later
949 but still do any needed low level processing.
951 FROM_TTY is described for update_solib_list, above. */
954 solib_add (const char *pattern
, int from_tty
, int readsyms
)
958 if (print_symbol_loading_p (from_tty
, 0, 0))
962 printf_unfiltered (_("Loading symbols for shared libraries: %s\n"),
966 printf_unfiltered (_("Loading symbols for shared libraries.\n"));
969 current_program_space
->solib_add_generation
++;
973 char *re_err
= re_comp (pattern
);
976 error (_("Invalid regexp: %s"), re_err
);
979 update_solib_list (from_tty
);
981 /* Walk the list of currently loaded shared libraries, and read
982 symbols for any that match the pattern --- or any whose symbols
983 aren't already loaded, if no pattern was given. */
986 int loaded_any_symbols
= 0;
987 symfile_add_flags add_flags
= SYMFILE_DEFER_BP_RESET
;
990 add_flags
|= SYMFILE_VERBOSE
;
992 for (gdb
= so_list_head
; gdb
; gdb
= gdb
->next
)
993 if (! pattern
|| re_exec (gdb
->so_name
))
995 /* Normally, we would read the symbols from that library
996 only if READSYMS is set. However, we're making a small
997 exception for the pthread library, because we sometimes
998 need the library symbols to be loaded in order to provide
999 thread support (x86-linux for instance). */
1000 const int add_this_solib
=
1001 (readsyms
|| libpthread_solib_p (gdb
));
1006 if (gdb
->symbols_loaded
)
1008 /* If no pattern was given, be quiet for shared
1009 libraries we have already loaded. */
1010 if (pattern
&& (from_tty
|| info_verbose
))
1011 printf_unfiltered (_("Symbols already loaded for %s\n"),
1014 else if (solib_read_symbols (gdb
, add_flags
))
1015 loaded_any_symbols
= 1;
1019 if (loaded_any_symbols
)
1020 breakpoint_re_set ();
1022 if (from_tty
&& pattern
&& ! any_matches
)
1024 ("No loaded shared libraries match the pattern `%s'.\n", pattern
);
1026 if (loaded_any_symbols
)
1028 /* Getting new symbols may change our opinion about what is
1030 reinit_frame_cache ();
1035 /* Implement the "info sharedlibrary" command. Walk through the
1036 shared library list and print information about each attached
1037 library matching PATTERN. If PATTERN is elided, print them
1041 info_sharedlibrary_command (const char *pattern
, int from_tty
)
1043 struct so_list
*so
= NULL
; /* link map state variable */
1044 int so_missing_debug_info
= 0;
1047 struct gdbarch
*gdbarch
= target_gdbarch ();
1048 struct ui_out
*uiout
= current_uiout
;
1052 char *re_err
= re_comp (pattern
);
1055 error (_("Invalid regexp: %s"), re_err
);
1058 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
1059 addr_width
= 4 + (gdbarch_ptr_bit (gdbarch
) / 4);
1061 update_solib_list (from_tty
);
1063 /* ui_out_emit_table table_emitter needs to know the number of rows,
1064 so we need to make two passes over the libs. */
1066 for (nr_libs
= 0, so
= so_list_head
; so
; so
= so
->next
)
1070 if (pattern
&& ! re_exec (so
->so_name
))
1077 ui_out_emit_table
table_emitter (uiout
, 4, nr_libs
, "SharedLibraryTable");
1079 /* The "- 1" is because ui_out adds one space between columns. */
1080 uiout
->table_header (addr_width
- 1, ui_left
, "from", "From");
1081 uiout
->table_header (addr_width
- 1, ui_left
, "to", "To");
1082 uiout
->table_header (12 - 1, ui_left
, "syms-read", "Syms Read");
1083 uiout
->table_header (0, ui_noalign
, "name", "Shared Object Library");
1085 uiout
->table_body ();
1089 if (! so
->so_name
[0])
1091 if (pattern
&& ! re_exec (so
->so_name
))
1094 ui_out_emit_tuple
tuple_emitter (uiout
, "lib");
1096 if (so
->addr_high
!= 0)
1098 uiout
->field_core_addr ("from", gdbarch
, so
->addr_low
);
1099 uiout
->field_core_addr ("to", gdbarch
, so
->addr_high
);
1103 uiout
->field_skip ("from");
1104 uiout
->field_skip ("to");
1107 if (! interp_ui_out (top_level_interpreter ())->is_mi_like_p ()
1108 && so
->symbols_loaded
1109 && !objfile_has_symbols (so
->objfile
))
1111 so_missing_debug_info
= 1;
1112 uiout
->field_string ("syms-read", "Yes (*)");
1115 uiout
->field_string ("syms-read", so
->symbols_loaded
? "Yes" : "No");
1117 uiout
->field_string ("name", so
->so_name
);
1126 uiout
->message (_("No shared libraries matched.\n"));
1128 uiout
->message (_("No shared libraries loaded at this time.\n"));
1132 if (so_missing_debug_info
)
1133 uiout
->message (_("(*): Shared library is missing "
1134 "debugging information.\n"));
1138 /* Return 1 if ADDRESS lies within SOLIB. */
1141 solib_contains_address_p (const struct so_list
*const solib
,
1144 struct target_section
*p
;
1146 for (p
= solib
->sections
; p
< solib
->sections_end
; p
++)
1147 if (p
->addr
<= address
&& address
< p
->endaddr
)
1153 /* If ADDRESS is in a shared lib in program space PSPACE, return its
1156 Provides a hook for other gdb routines to discover whether or not a
1157 particular address is within the mapped address space of a shared
1160 For example, this routine is called at one point to disable
1161 breakpoints which are in shared libraries that are not currently
1165 solib_name_from_address (struct program_space
*pspace
, CORE_ADDR address
)
1167 struct so_list
*so
= NULL
;
1169 for (so
= pspace
->so_list
; so
; so
= so
->next
)
1170 if (solib_contains_address_p (so
, address
))
1171 return (so
->so_name
);
1176 /* Return whether the data starting at VADDR, size SIZE, must be kept
1177 in a core file for shared libraries loaded before "gcore" is used
1178 to be handled correctly when the core file is loaded. This only
1179 applies when the section would otherwise not be kept in the core
1180 file (in particular, for readonly sections). */
1183 solib_keep_data_in_core (CORE_ADDR vaddr
, unsigned long size
)
1185 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1187 if (ops
->keep_data_in_core
)
1188 return ops
->keep_data_in_core (vaddr
, size
);
1193 /* Called by free_all_symtabs */
1198 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1200 disable_breakpoints_in_shlibs ();
1202 while (so_list_head
)
1204 struct so_list
*so
= so_list_head
;
1206 so_list_head
= so
->next
;
1207 observer_notify_solib_unloaded (so
);
1208 remove_target_sections (so
);
1212 ops
->clear_solib ();
1215 /* Shared library startup support. When GDB starts up the inferior,
1216 it nurses it along (through the shell) until it is ready to execute
1217 its first instruction. At this point, this function gets
1221 solib_create_inferior_hook (int from_tty
)
1223 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1225 ops
->solib_create_inferior_hook (from_tty
);
1228 /* Check to see if an address is in the dynamic loader's dynamic
1229 symbol resolution code. Return 1 if so, 0 otherwise. */
1232 in_solib_dynsym_resolve_code (CORE_ADDR pc
)
1234 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1236 return ops
->in_dynsym_resolve_code (pc
);
1239 /* Implements the "sharedlibrary" command. */
1242 sharedlibrary_command (const char *args
, int from_tty
)
1245 solib_add (args
, from_tty
, 1);
1248 /* Implements the command "nosharedlibrary", which discards symbols
1249 that have been auto-loaded from shared libraries. Symbols from
1250 shared libraries that were added by explicit request of the user
1251 are not discarded. Also called from remote.c. */
1254 no_shared_libraries (const char *ignored
, int from_tty
)
1256 /* The order of the two routines below is important: clear_solib notifies
1257 the solib_unloaded observers, and some of these observers might need
1258 access to their associated objfiles. Therefore, we can not purge the
1259 solibs' objfiles before clear_solib has been called. */
1262 objfile_purge_solibs ();
1268 update_solib_breakpoints (void)
1270 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1272 if (ops
->update_breakpoints
!= NULL
)
1273 ops
->update_breakpoints ();
1279 handle_solib_event (void)
1281 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1283 if (ops
->handle_event
!= NULL
)
1284 ops
->handle_event ();
1286 clear_program_space_solib_cache (current_inferior ()->pspace
);
1288 /* Check for any newly added shared libraries if we're supposed to
1289 be adding them automatically. Switch terminal for any messages
1290 produced by breakpoint_re_set. */
1291 target_terminal::ours_for_output ();
1292 solib_add (NULL
, 0, auto_solib_add
);
1293 target_terminal::inferior ();
1296 /* Reload shared libraries, but avoid reloading the same symbol file
1297 we already have loaded. */
1300 reload_shared_libraries_1 (int from_tty
)
1304 if (print_symbol_loading_p (from_tty
, 0, 0))
1305 printf_unfiltered (_("Loading symbols for shared libraries.\n"));
1307 for (so
= so_list_head
; so
!= NULL
; so
= so
->next
)
1309 char *found_pathname
= NULL
;
1310 int was_loaded
= so
->symbols_loaded
;
1311 symfile_add_flags add_flags
= SYMFILE_DEFER_BP_RESET
;
1314 add_flags
|= SYMFILE_VERBOSE
;
1316 gdb::unique_xmalloc_ptr
<char> filename
1317 (tilde_expand (so
->so_original_name
));
1318 gdb_bfd_ref_ptr
abfd (solib_bfd_open (filename
.get ()));
1320 found_pathname
= bfd_get_filename (abfd
.get ());
1322 /* If this shared library is no longer associated with its previous
1323 symbol file, close that. */
1324 if ((found_pathname
== NULL
&& was_loaded
)
1325 || (found_pathname
!= NULL
1326 && filename_cmp (found_pathname
, so
->so_name
) != 0))
1328 if (so
->objfile
&& ! (so
->objfile
->flags
& OBJF_USERLOADED
)
1329 && !solib_used (so
))
1331 remove_target_sections (so
);
1335 /* If this shared library is now associated with a new symbol
1337 if (found_pathname
!= NULL
1339 || filename_cmp (found_pathname
, so
->so_name
) != 0))
1345 solib_map_sections (so
);
1348 CATCH (e
, RETURN_MASK_ERROR
)
1350 exception_fprintf (gdb_stderr
, e
,
1351 _("Error while mapping "
1352 "shared library sections:\n"));
1358 && (auto_solib_add
|| was_loaded
|| libpthread_solib_p (so
)))
1359 solib_read_symbols (so
, add_flags
);
1365 reload_shared_libraries (const char *ignored
, int from_tty
,
1366 struct cmd_list_element
*e
)
1368 const struct target_so_ops
*ops
;
1370 reload_shared_libraries_1 (from_tty
);
1372 ops
= solib_ops (target_gdbarch ());
1374 /* Creating inferior hooks here has two purposes. First, if we reload
1375 shared libraries then the address of solib breakpoint we've computed
1376 previously might be no longer valid. For example, if we forgot to set
1377 solib-absolute-prefix and are setting it right now, then the previous
1378 breakpoint address is plain wrong. Second, installing solib hooks
1379 also implicitly figures were ld.so is and loads symbols for it.
1380 Absent this call, if we've just connected to a target and set
1381 solib-absolute-prefix or solib-search-path, we'll lose all information
1383 if (target_has_execution
)
1385 /* Reset or free private data structures not associated with
1387 ops
->clear_solib ();
1389 /* Remove any previous solib event breakpoint. This is usually
1390 done in common code, at breakpoint_init_inferior time, but
1391 we're not really starting up the inferior here. */
1392 remove_solib_event_breakpoints ();
1394 solib_create_inferior_hook (from_tty
);
1397 /* Sometimes the platform-specific hook loads initial shared
1398 libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be
1399 incorrectly 0 but such solib targets should be fixed anyway. If we
1400 made all the inferior hook methods consistent, this call could be
1401 removed. Call it only after the solib target has been initialized by
1402 solib_create_inferior_hook. */
1404 solib_add (NULL
, 0, auto_solib_add
);
1406 breakpoint_re_set ();
1408 /* We may have loaded or unloaded debug info for some (or all)
1409 shared libraries. However, frames may still reference them. For
1410 example, a frame's unwinder might still point at DWARF FDE
1411 structures that are now freed. Also, getting new symbols may
1412 change our opinion about what is frameless. */
1413 reinit_frame_cache ();
1416 /* Wrapper for reload_shared_libraries that replaces "remote:"
1417 at the start of gdb_sysroot with "target:". */
1420 gdb_sysroot_changed (const char *ignored
, int from_tty
,
1421 struct cmd_list_element
*e
)
1423 const char *old_prefix
= "remote:";
1424 const char *new_prefix
= TARGET_SYSROOT_PREFIX
;
1426 if (startswith (gdb_sysroot
, old_prefix
))
1428 static int warning_issued
= 0;
1430 gdb_assert (strlen (old_prefix
) == strlen (new_prefix
));
1431 memcpy (gdb_sysroot
, new_prefix
, strlen (new_prefix
));
1433 if (!warning_issued
)
1435 warning (_("\"%s\" is deprecated, use \"%s\" instead."),
1436 old_prefix
, new_prefix
);
1437 warning (_("sysroot set to \"%s\"."), gdb_sysroot
);
1443 reload_shared_libraries (ignored
, from_tty
, e
);
1447 show_auto_solib_add (struct ui_file
*file
, int from_tty
,
1448 struct cmd_list_element
*c
, const char *value
)
1450 fprintf_filtered (file
, _("Autoloading of shared library symbols is %s.\n"),
1455 /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call
1456 the library-specific handler if it is installed for the current target. */
1459 solib_global_lookup (struct objfile
*objfile
,
1461 const domain_enum domain
)
1463 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1465 if (ops
->lookup_lib_global_symbol
!= NULL
)
1466 return ops
->lookup_lib_global_symbol (objfile
, name
, domain
);
1467 return (struct block_symbol
) {NULL
, NULL
};
1470 /* Lookup the value for a specific symbol from dynamic symbol table. Look
1471 up symbol from ABFD. MATCH_SYM is a callback function to determine
1472 whether to pick up a symbol. DATA is the input of this callback
1473 function. Return NULL if symbol is not found. */
1476 gdb_bfd_lookup_symbol_from_symtab (bfd
*abfd
,
1477 int (*match_sym
) (const asymbol
*,
1481 long storage_needed
= bfd_get_symtab_upper_bound (abfd
);
1482 CORE_ADDR symaddr
= 0;
1484 if (storage_needed
> 0)
1488 asymbol
**symbol_table
= (asymbol
**) xmalloc (storage_needed
);
1489 struct cleanup
*back_to
= make_cleanup (xfree
, symbol_table
);
1490 unsigned int number_of_symbols
=
1491 bfd_canonicalize_symtab (abfd
, symbol_table
);
1493 for (i
= 0; i
< number_of_symbols
; i
++)
1495 asymbol
*sym
= *symbol_table
++;
1497 if (match_sym (sym
, data
))
1499 struct gdbarch
*gdbarch
= target_gdbarch ();
1500 symaddr
= sym
->value
;
1502 /* Some ELF targets fiddle with addresses of symbols they
1503 consider special. They use minimal symbols to do that
1504 and this is needed for correct breakpoint placement,
1505 but we do not have full data here to build a complete
1506 minimal symbol, so just set the address and let the
1507 targets cope with that. */
1508 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1509 && gdbarch_elf_make_msymbol_special_p (gdbarch
))
1511 struct minimal_symbol msym
;
1513 memset (&msym
, 0, sizeof (msym
));
1514 SET_MSYMBOL_VALUE_ADDRESS (&msym
, symaddr
);
1515 gdbarch_elf_make_msymbol_special (gdbarch
, sym
, &msym
);
1516 symaddr
= MSYMBOL_VALUE_RAW_ADDRESS (&msym
);
1519 /* BFD symbols are section relative. */
1520 symaddr
+= sym
->section
->vma
;
1524 do_cleanups (back_to
);
1530 /* Lookup the value for a specific symbol from symbol table. Look up symbol
1531 from ABFD. MATCH_SYM is a callback function to determine whether to pick
1532 up a symbol. DATA is the input of this callback function. Return NULL
1533 if symbol is not found. */
1536 bfd_lookup_symbol_from_dyn_symtab (bfd
*abfd
,
1537 int (*match_sym
) (const asymbol
*,
1541 long storage_needed
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1542 CORE_ADDR symaddr
= 0;
1544 if (storage_needed
> 0)
1547 asymbol
**symbol_table
= (asymbol
**) xmalloc (storage_needed
);
1548 struct cleanup
*back_to
= make_cleanup (xfree
, symbol_table
);
1549 unsigned int number_of_symbols
=
1550 bfd_canonicalize_dynamic_symtab (abfd
, symbol_table
);
1552 for (i
= 0; i
< number_of_symbols
; i
++)
1554 asymbol
*sym
= *symbol_table
++;
1556 if (match_sym (sym
, data
))
1558 /* BFD symbols are section relative. */
1559 symaddr
= sym
->value
+ sym
->section
->vma
;
1563 do_cleanups (back_to
);
1568 /* Lookup the value for a specific symbol from symbol table and dynamic
1569 symbol table. Look up symbol from ABFD. MATCH_SYM is a callback
1570 function to determine whether to pick up a symbol. DATA is the
1571 input of this callback function. Return NULL if symbol is not
1575 gdb_bfd_lookup_symbol (bfd
*abfd
,
1576 int (*match_sym
) (const asymbol
*, const void *),
1579 CORE_ADDR symaddr
= gdb_bfd_lookup_symbol_from_symtab (abfd
, match_sym
, data
);
1581 /* On FreeBSD, the dynamic linker is stripped by default. So we'll
1582 have to check the dynamic string table too. */
1584 symaddr
= bfd_lookup_symbol_from_dyn_symtab (abfd
, match_sym
, data
);
1589 /* SO_LIST_HEAD may contain user-loaded object files that can be removed
1590 out-of-band by the user. So upon notification of free_objfile remove
1591 all references to any user-loaded file that is about to be freed. */
1594 remove_user_added_objfile (struct objfile
*objfile
)
1598 if (objfile
!= 0 && objfile
->flags
& OBJF_USERLOADED
)
1600 for (so
= so_list_head
; so
!= NULL
; so
= so
->next
)
1601 if (so
->objfile
== objfile
)
1607 _initialize_solib (void)
1609 solib_data
= gdbarch_data_register_pre_init (solib_init
);
1611 observer_attach_free_objfile (remove_user_added_objfile
);
1613 add_com ("sharedlibrary", class_files
, sharedlibrary_command
,
1614 _("Load shared object library symbols for files matching REGEXP."));
1615 add_info ("sharedlibrary", info_sharedlibrary_command
,
1616 _("Status of loaded shared object libraries."));
1617 add_info_alias ("dll", "sharedlibrary", 1);
1618 add_com ("nosharedlibrary", class_files
, no_shared_libraries
,
1619 _("Unload all shared object library symbols."));
1621 add_setshow_boolean_cmd ("auto-solib-add", class_support
,
1622 &auto_solib_add
, _("\
1623 Set autoloading of shared library symbols."), _("\
1624 Show autoloading of shared library symbols."), _("\
1625 If \"on\", symbols from all shared object libraries will be loaded\n\
1626 automatically when the inferior begins execution, when the dynamic linker\n\
1627 informs gdb that a new library has been loaded, or when attaching to the\n\
1628 inferior. Otherwise, symbols must be loaded manually, using \
1631 show_auto_solib_add
,
1632 &setlist
, &showlist
);
1634 add_setshow_optional_filename_cmd ("sysroot", class_support
,
1636 Set an alternate system root."), _("\
1637 Show the current system root."), _("\
1638 The system root is used to load absolute shared library symbol files.\n\
1639 For other (relative) files, you can add directories using\n\
1640 `set solib-search-path'."),
1641 gdb_sysroot_changed
,
1643 &setlist
, &showlist
);
1645 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1647 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1650 add_setshow_optional_filename_cmd ("solib-search-path", class_support
,
1651 &solib_search_path
, _("\
1652 Set the search path for loading non-absolute shared library symbol files."),
1654 Show the search path for loading non-absolute shared library symbol files."),
1656 This takes precedence over the environment variables \
1657 PATH and LD_LIBRARY_PATH."),
1658 reload_shared_libraries
,
1659 show_solib_search_path
,
1660 &setlist
, &showlist
);