1 /* Handle shared libraries for GDB, the GNU Debugger.
3 Copyright (C) 1990-2021 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"
34 #include "gdbsupport/environ.h"
37 #include "completer.h"
38 #include "elf/external.h"
39 #include "elf/common.h"
40 #include "filenames.h" /* for DOSish file names */
43 #include "observable.h"
44 #include "readline/tilde.h"
48 #include "filesystem.h"
50 #include "gdbsupport/filestuff.h"
52 #include "cli/cli-style.h"
54 /* Architecture-specific operations. */
56 /* Per-architecture data key. */
57 static struct gdbarch_data
*solib_data
;
60 solib_init (struct obstack
*obstack
)
62 struct target_so_ops
**ops
;
64 ops
= OBSTACK_ZALLOC (obstack
, struct target_so_ops
*);
65 *ops
= current_target_so_ops
;
69 static const struct target_so_ops
*
70 solib_ops (struct gdbarch
*gdbarch
)
72 const struct target_so_ops
**ops
73 = (const struct target_so_ops
**) gdbarch_data (gdbarch
, solib_data
);
78 /* Set the solib operations for GDBARCH to NEW_OPS. */
81 set_solib_ops (struct gdbarch
*gdbarch
, const struct target_so_ops
*new_ops
)
83 const struct target_so_ops
**ops
84 = (const struct target_so_ops
**) gdbarch_data (gdbarch
, solib_data
);
90 /* external data declarations */
92 /* FIXME: gdbarch needs to control this variable, or else every
93 configuration needs to call set_solib_ops. */
94 struct target_so_ops
*current_target_so_ops
;
96 /* Local function prototypes */
98 /* If non-empty, this is a search path for loading non-absolute shared library
99 symbol files. This takes precedence over the environment variables PATH
100 and LD_LIBRARY_PATH. */
101 static char *solib_search_path
= NULL
;
103 show_solib_search_path (struct ui_file
*file
, int from_tty
,
104 struct cmd_list_element
*c
, const char *value
)
106 fprintf_filtered (file
, _("The search path for loading non-absolute "
107 "shared library symbol files is %s.\n"),
111 /* Same as HAVE_DOS_BASED_FILE_SYSTEM, but useable as an rvalue. */
112 #if (HAVE_DOS_BASED_FILE_SYSTEM)
113 # define DOS_BASED_FILE_SYSTEM 1
115 # define DOS_BASED_FILE_SYSTEM 0
118 /* Return the full pathname of a binary file (the main executable or a
119 shared library file), or NULL if not found. If FD is non-NULL, *FD
120 is set to either -1 or an open file handle for the binary file.
122 Global variable GDB_SYSROOT is used as a prefix directory
123 to search for binary files if they have an absolute path.
124 If GDB_SYSROOT starts with "target:" and target filesystem
125 is the local filesystem then the "target:" prefix will be
126 stripped before the search starts. This ensures that the
127 same search algorithm is used for local files regardless of
128 whether a "target:" prefix was used.
130 Global variable SOLIB_SEARCH_PATH is used as a prefix directory
131 (or set of directories, as in LD_LIBRARY_PATH) to search for all
132 shared libraries if not found in either the sysroot (if set) or
133 the local filesystem. SOLIB_SEARCH_PATH is not used when searching
134 for the main executable.
137 * If a sysroot is set and path is absolute:
138 * Search for sysroot/path.
140 * Look for it literally (unmodified).
141 * If IS_SOLIB is non-zero:
142 * Look in SOLIB_SEARCH_PATH.
143 * If available, use target defined search function.
144 * If NO sysroot is set, perform the following two searches:
145 * Look in inferior's $PATH.
146 * If IS_SOLIB is non-zero:
147 * Look in inferior's $LD_LIBRARY_PATH.
149 * The last check avoids doing this search when targeting remote
150 * machines since a sysroot will almost always be set.
153 static gdb::unique_xmalloc_ptr
<char>
154 solib_find_1 (const char *in_pathname
, int *fd
, bool is_solib
)
156 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
158 gdb::unique_xmalloc_ptr
<char> temp_pathname
;
159 const char *fskind
= effective_target_file_system_kind ();
160 const char *sysroot
= gdb_sysroot
;
161 int prefix_len
, orig_prefix_len
;
163 /* If the absolute prefix starts with "target:" but the filesystem
164 accessed by the target_fileio_* methods is the local filesystem
165 then we strip the "target:" prefix now and work with the local
166 filesystem. This ensures that the same search algorithm is used
167 for all local files regardless of whether a "target:" prefix was
169 if (is_target_filename (sysroot
) && target_filesystem_is_local ())
170 sysroot
+= strlen (TARGET_SYSROOT_PREFIX
);
172 /* Strip any trailing slashes from the absolute prefix. */
173 prefix_len
= orig_prefix_len
= strlen (sysroot
);
175 while (prefix_len
> 0 && IS_DIR_SEPARATOR (sysroot
[prefix_len
- 1]))
178 std::string sysroot_holder
;
181 else if (prefix_len
!= orig_prefix_len
)
183 sysroot_holder
= std::string (sysroot
, prefix_len
);
184 sysroot
= sysroot_holder
.c_str ();
187 /* If we're on a non-DOS-based system, backslashes won't be
188 understood as directory separator, so, convert them to forward
189 slashes, iff we're supposed to handle DOS-based file system
190 semantics for target paths. */
191 if (!DOS_BASED_FILE_SYSTEM
&& fskind
== file_system_kind_dos_based
)
195 /* Avoid clobbering our input. */
196 p
= (char *) alloca (strlen (in_pathname
) + 1);
197 strcpy (p
, in_pathname
);
207 /* Note, we're interested in IS_TARGET_ABSOLUTE_PATH, not
208 IS_ABSOLUTE_PATH. The latter is for host paths only, while
209 IN_PATHNAME is a target path. For example, if we're supposed to
210 be handling DOS-like semantics we want to consider a
211 'c:/foo/bar.dll' path as an absolute path, even on a Unix box.
212 With such a path, before giving up on the sysroot, we'll try:
214 1st attempt, c:/foo/bar.dll ==> /sysroot/c:/foo/bar.dll
215 2nd attempt, c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll
216 3rd attempt, c:/foo/bar.dll ==> /sysroot/foo/bar.dll
219 if (!IS_TARGET_ABSOLUTE_PATH (fskind
, in_pathname
) || sysroot
== NULL
)
220 temp_pathname
.reset (xstrdup (in_pathname
));
223 bool need_dir_separator
;
225 /* Concatenate the sysroot and the target reported filename. We
226 may need to glue them with a directory separator. Cases to
229 | sysroot | separator | in_pathname |
230 |-----------------+-----------+----------------|
231 | /some/dir | / | c:/foo/bar.dll |
232 | /some/dir | | /foo/bar.dll |
233 | target: | | c:/foo/bar.dll |
234 | target: | | /foo/bar.dll |
235 | target:some/dir | / | c:/foo/bar.dll |
236 | target:some/dir | | /foo/bar.dll |
238 IOW, we don't need to add a separator if IN_PATHNAME already
239 has one, or when the sysroot is exactly "target:".
240 There's no need to check for drive spec explicitly, as we only
241 get here if IN_PATHNAME is considered an absolute path. */
242 need_dir_separator
= !(IS_DIR_SEPARATOR (in_pathname
[0])
243 || strcmp (TARGET_SYSROOT_PREFIX
, sysroot
) == 0);
245 /* Cat the prefixed pathname together. */
246 temp_pathname
.reset (concat (sysroot
,
247 need_dir_separator
? SLASH_STRING
: "",
248 in_pathname
, (char *) NULL
));
251 /* Handle files to be accessed via the target. */
252 if (is_target_filename (temp_pathname
.get ()))
256 return temp_pathname
;
259 /* Now see if we can open it. */
260 found_file
= gdb_open_cloexec (temp_pathname
.get (), O_RDONLY
| O_BINARY
, 0);
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 bool need_dir_separator
= !IS_DIR_SEPARATOR (in_pathname
[2]);
272 char drive
[2] = { in_pathname
[0], '\0' };
274 temp_pathname
.reset (concat (sysroot
,
277 need_dir_separator
? SLASH_STRING
: "",
278 in_pathname
+ 2, (char *) NULL
));
280 found_file
= gdb_open_cloexec (temp_pathname
.get (),
281 O_RDONLY
| O_BINARY
, 0);
284 /* If the search in gdb_sysroot still failed, try fully
285 stripping the drive spec, and trying once more in the
286 sysroot before giving up.
288 c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */
290 temp_pathname
.reset (concat (sysroot
,
291 need_dir_separator
? SLASH_STRING
: "",
292 in_pathname
+ 2, (char *) NULL
));
294 found_file
= gdb_open_cloexec (temp_pathname
.get (),
295 O_RDONLY
| O_BINARY
, 0);
299 /* We try to find the library in various ways. After each attempt,
300 either found_file >= 0 and temp_pathname is a malloc'd string, or
301 found_file < 0 and temp_pathname does not point to storage that
302 needs to be freed. */
305 temp_pathname
.reset (NULL
);
307 /* If the search in gdb_sysroot failed, and the path name is
308 absolute at this point, make it relative. (openp will try and open the
309 file according to its absolute path otherwise, which is not what we want.)
310 Affects subsequent searches for this solib. */
311 if (found_file
< 0 && IS_TARGET_ABSOLUTE_PATH (fskind
, in_pathname
))
313 /* First, get rid of any drive letters etc. */
314 while (!IS_TARGET_DIR_SEPARATOR (fskind
, *in_pathname
))
317 /* Next, get rid of all leading dir separators. */
318 while (IS_TARGET_DIR_SEPARATOR (fskind
, *in_pathname
))
322 /* If not found, and we're looking for a solib, search the
323 solib_search_path (if any). */
324 if (is_solib
&& found_file
< 0 && solib_search_path
!= NULL
)
325 found_file
= openp (solib_search_path
,
326 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
327 in_pathname
, O_RDONLY
| O_BINARY
, &temp_pathname
);
329 /* If not found, and we're looking for a solib, next search the
330 solib_search_path (if any) for the basename only (ignoring the
331 path). This is to allow reading solibs from a path that differs
332 from the opened path. */
333 if (is_solib
&& found_file
< 0 && solib_search_path
!= NULL
)
334 found_file
= openp (solib_search_path
,
335 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
336 target_lbasename (fskind
, in_pathname
),
337 O_RDONLY
| O_BINARY
, &temp_pathname
);
339 /* If not found, and we're looking for a solib, try to use target
340 supplied solib search method. */
341 if (is_solib
&& found_file
< 0 && ops
->find_and_open_solib
)
342 found_file
= ops
->find_and_open_solib (in_pathname
, O_RDONLY
| O_BINARY
,
345 /* If not found, next search the inferior's $PATH environment variable. */
346 if (found_file
< 0 && sysroot
== NULL
)
347 found_file
= openp (current_inferior ()->environment
.get ("PATH"),
348 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
, in_pathname
,
349 O_RDONLY
| O_BINARY
, &temp_pathname
);
351 /* If not found, and we're looking for a solib, next search the
352 inferior's $LD_LIBRARY_PATH environment variable. */
353 if (is_solib
&& found_file
< 0 && sysroot
== NULL
)
354 found_file
= openp (current_inferior ()->environment
.get
356 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
, in_pathname
,
357 O_RDONLY
| O_BINARY
, &temp_pathname
);
367 return temp_pathname
;
370 /* Return the full pathname of the main executable, or NULL if not
371 found. If FD is non-NULL, *FD is set to either -1 or an open file
372 handle for the main executable. */
374 gdb::unique_xmalloc_ptr
<char>
375 exec_file_find (const char *in_pathname
, int *fd
)
377 gdb::unique_xmalloc_ptr
<char> result
;
378 const char *fskind
= effective_target_file_system_kind ();
380 if (in_pathname
== NULL
)
383 if (*gdb_sysroot
!= '\0' && IS_TARGET_ABSOLUTE_PATH (fskind
, in_pathname
))
385 result
= solib_find_1 (in_pathname
, fd
, false);
387 if (result
== NULL
&& fskind
== file_system_kind_dos_based
)
391 new_pathname
= (char *) alloca (strlen (in_pathname
) + 5);
392 strcpy (new_pathname
, in_pathname
);
393 strcat (new_pathname
, ".exe");
395 result
= solib_find_1 (new_pathname
, fd
, false);
400 /* It's possible we don't have a full path, but rather just a
401 filename. Some targets, such as HP-UX, don't provide the
404 Attempt to qualify the filename against the source path.
405 (If that fails, we'll just fall back on the original
406 filename. Not much more we can do...) */
408 if (!source_full_path_of (in_pathname
, &result
))
409 result
.reset (xstrdup (in_pathname
));
417 /* Return the full pathname of a shared library file, or NULL if not
418 found. If FD is non-NULL, *FD is set to either -1 or an open file
419 handle for the shared library.
421 The search algorithm used is described in solib_find_1's comment
424 gdb::unique_xmalloc_ptr
<char>
425 solib_find (const char *in_pathname
, int *fd
)
427 const char *solib_symbols_extension
428 = gdbarch_solib_symbols_extension (target_gdbarch ());
430 /* If solib_symbols_extension is set, replace the file's
432 if (solib_symbols_extension
!= NULL
)
434 const char *p
= in_pathname
+ strlen (in_pathname
);
436 while (p
> in_pathname
&& *p
!= '.')
444 = (char *) alloca (p
- in_pathname
+ 1
445 + strlen (solib_symbols_extension
) + 1);
446 memcpy (new_pathname
, in_pathname
, p
- in_pathname
+ 1);
447 strcpy (new_pathname
+ (p
- in_pathname
) + 1,
448 solib_symbols_extension
);
450 in_pathname
= new_pathname
;
454 return solib_find_1 (in_pathname
, fd
, true);
457 /* Open and return a BFD for the shared library PATHNAME. If FD is not -1,
458 it is used as file handle to open the file. Throws an error if the file
459 could not be opened. Handles both local and remote file access.
461 If unsuccessful, the FD will be closed (unless FD was -1). */
464 solib_bfd_fopen (const char *pathname
, int fd
)
466 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (pathname
, gnutarget
, fd
));
468 if (abfd
!= NULL
&& !gdb_bfd_has_target_filename (abfd
.get ()))
469 bfd_set_cacheable (abfd
.get (), 1);
473 /* Arrange to free PATHNAME when the error is thrown. */
474 error (_("Could not open `%s' as an executable file: %s"),
475 pathname
, bfd_errmsg (bfd_get_error ()));
481 /* Find shared library PATHNAME and open a BFD for it. */
484 solib_bfd_open (const char *pathname
)
487 const struct bfd_arch_info
*b
;
489 /* Search for shared library file. */
490 gdb::unique_xmalloc_ptr
<char> found_pathname
491 = solib_find (pathname
, &found_file
);
492 if (found_pathname
== NULL
)
494 /* Return failure if the file could not be found, so that we can
495 accumulate messages about missing libraries. */
499 perror_with_name (pathname
);
502 /* Open bfd for shared library. */
503 gdb_bfd_ref_ptr
abfd (solib_bfd_fopen (found_pathname
.get (), found_file
));
505 /* Check bfd format. */
506 if (!bfd_check_format (abfd
.get (), bfd_object
))
507 error (_("`%s': not in executable format: %s"),
508 bfd_get_filename (abfd
.get ()), bfd_errmsg (bfd_get_error ()));
510 /* Check bfd arch. */
511 b
= gdbarch_bfd_arch_info (target_gdbarch ());
512 if (!b
->compatible (b
, bfd_get_arch_info (abfd
.get ())))
513 warning (_("`%s': Shared library architecture %s is not compatible "
514 "with target architecture %s."), bfd_get_filename (abfd
.get ()),
515 bfd_get_arch_info (abfd
.get ())->printable_name
,
521 /* Given a pointer to one of the shared objects in our list of mapped
522 objects, use the recorded name to open a bfd descriptor for the
523 object, build a section table, relocate all the section addresses
524 by the base address at which the shared object was mapped, and then
525 add the sections to the target's section table.
527 FIXME: In most (all?) cases the shared object file name recorded in
528 the dynamic linkage tables will be a fully qualified pathname. For
529 cases where it isn't, do we really mimic the systems search
530 mechanism correctly in the below code (particularly the tilde
531 expansion stuff?). */
534 solib_map_sections (struct so_list
*so
)
536 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
538 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (so
->so_name
));
539 gdb_bfd_ref_ptr
abfd (ops
->bfd_open (filename
.get ()));
544 /* Leave bfd open, core_xfer_memory and "info files" need it. */
545 so
->abfd
= abfd
.release ();
547 /* Copy the full path name into so_name, allowing symbol_file_add
548 to find it later. This also affects the =library-loaded GDB/MI
549 event, and in particular the part of that notification providing
550 the library's host-side path. If we let the target dictate
551 that objfile's path, and the target is different from the host,
552 GDB/MI will not provide the correct host-side path. */
553 if (strlen (bfd_get_filename (so
->abfd
)) >= SO_NAME_MAX_PATH_SIZE
)
554 error (_("Shared library file name is too long."));
555 strcpy (so
->so_name
, bfd_get_filename (so
->abfd
));
557 if (so
->sections
== nullptr)
558 so
->sections
= new target_section_table
;
559 *so
->sections
= build_section_table (so
->abfd
);
561 for (target_section
&p
: *so
->sections
)
563 /* Relocate the section binding addresses as recorded in the shared
564 object's file by the base address to which the object was actually
566 ops
->relocate_section_addresses (so
, &p
);
568 /* If the target didn't provide information about the address
569 range of the shared object, assume we want the location of
570 the .text section. */
571 if (so
->addr_low
== 0 && so
->addr_high
== 0
572 && strcmp (p
.the_bfd_section
->name
, ".text") == 0)
574 so
->addr_low
= p
.addr
;
575 so
->addr_high
= p
.endaddr
;
579 /* Add the shared object's sections to the current set of file
580 section tables. Do this immediately after mapping the object so
581 that later nodes in the list can query this object, as is needed
583 current_program_space
->add_target_sections (so
, *so
->sections
);
588 /* Free symbol-file related contents of SO and reset for possible reloading
589 of SO. If we have opened a BFD for SO, close it. If we have placed SO's
590 sections in some target's section table, the caller is responsible for
593 This function doesn't mess with objfiles at all. If there is an
594 objfile associated with SO that needs to be removed, the caller is
595 responsible for taking care of that. */
598 clear_so (struct so_list
*so
)
600 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
605 gdb_bfd_unref (so
->abfd
);
608 /* Our caller closed the objfile, possibly via objfile_purge_solibs. */
609 so
->symbols_loaded
= 0;
612 so
->addr_low
= so
->addr_high
= 0;
614 /* Restore the target-supplied file name. SO_NAME may be the path
615 of the symbol file. */
616 strcpy (so
->so_name
, so
->so_original_name
);
618 /* Do the same for target-specific data. */
619 if (ops
->clear_so
!= NULL
)
623 /* Free the storage associated with the `struct so_list' object SO.
624 If we have opened a BFD for SO, close it.
626 The caller is responsible for removing SO from whatever list it is
627 a member of. If we have placed SO's sections in some target's
628 section table, the caller is responsible for removing them.
630 This function doesn't mess with objfiles at all. If there is an
631 objfile associated with SO that needs to be removed, the caller is
632 responsible for taking care of that. */
635 free_so (struct so_list
*so
)
637 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
646 /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS,
647 be chatty about it. Return true if any symbols were actually loaded. */
650 solib_read_symbols (struct so_list
*so
, symfile_add_flags flags
)
652 if (so
->symbols_loaded
)
654 /* If needed, we've already warned in our caller. */
656 else if (so
->abfd
== NULL
)
658 /* We've already warned about this library, when trying to open
664 flags
|= current_inferior ()->symfile_flags
;
668 /* Have we already loaded this shared object? */
669 so
->objfile
= nullptr;
670 for (objfile
*objfile
: current_program_space
->objfiles ())
672 if (filename_cmp (objfile_name (objfile
), so
->so_name
) == 0
673 && objfile
->addr_low
== so
->addr_low
)
675 so
->objfile
= objfile
;
679 if (so
->objfile
== NULL
)
681 section_addr_info sap
682 = build_section_addr_info_from_section_table (*so
->sections
);
683 so
->objfile
= symbol_file_add_from_bfd (so
->abfd
, so
->so_name
,
686 so
->objfile
->addr_low
= so
->addr_low
;
689 so
->symbols_loaded
= 1;
691 catch (const gdb_exception_error
&e
)
693 exception_fprintf (gdb_stderr
, e
, _("Error while reading shared"
694 " library symbols for %s:\n"),
704 /* Return true if KNOWN->objfile is used by any other so_list object
705 in the list of shared libraries. Return false otherwise. */
708 solib_used (const struct so_list
*const known
)
710 for (const struct so_list
*pivot
: current_program_space
->solibs ())
711 if (pivot
!= known
&& pivot
->objfile
== known
->objfile
)
719 update_solib_list (int from_tty
)
721 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
722 struct so_list
*inferior
= ops
->current_sos();
723 struct so_list
*gdb
, **gdb_link
;
725 /* We can reach here due to changing solib-search-path or the
726 sysroot, before having any inferior. */
727 if (target_has_execution () && inferior_ptid
!= null_ptid
)
729 struct inferior
*inf
= current_inferior ();
731 /* If we are attaching to a running process for which we
732 have not opened a symbol file, we may be able to get its
735 && current_program_space
->symfile_object_file
== NULL
)
739 ops
->open_symbol_file_object (from_tty
);
741 catch (const gdb_exception
&ex
)
743 exception_fprintf (gdb_stderr
, ex
,
744 "Error reading attached "
745 "process's symbol file.\n");
750 /* GDB and the inferior's dynamic linker each maintain their own
751 list of currently loaded shared objects; we want to bring the
752 former in sync with the latter. Scan both lists, seeing which
753 shared objects appear where. There are three cases:
755 - A shared object appears on both lists. This means that GDB
756 knows about it already, and it's still loaded in the inferior.
757 Nothing needs to happen.
759 - A shared object appears only on GDB's list. This means that
760 the inferior has unloaded it. We should remove the shared
761 object from GDB's tables.
763 - A shared object appears only on the inferior's list. This
764 means that it's just been loaded. We should add it to GDB's
767 So we walk GDB's list, checking each entry to see if it appears
768 in the inferior's list too. If it does, no action is needed, and
769 we remove it from the inferior's list. If it doesn't, the
770 inferior has unloaded it, and we remove it from GDB's list. By
771 the time we're done walking GDB's list, the inferior's list
772 contains only the new shared objects, which we then add. */
774 gdb
= current_program_space
->so_list
;
775 gdb_link
= ¤t_program_space
->so_list
;
778 struct so_list
*i
= inferior
;
779 struct so_list
**i_link
= &inferior
;
781 /* Check to see whether the shared object *gdb also appears in
782 the inferior's current list. */
787 if (ops
->same (gdb
, i
))
792 if (! filename_cmp (gdb
->so_original_name
, i
->so_original_name
))
800 /* If the shared object appears on the inferior's list too, then
801 it's still loaded, so we don't need to do anything. Delete
802 it from the inferior's list, and leave it on GDB's list. */
807 gdb_link
= &gdb
->next
;
811 /* If it's not on the inferior's list, remove it from GDB's tables. */
814 /* Notify any observer that the shared object has been
815 unloaded before we remove it from GDB's tables. */
816 gdb::observers::solib_unloaded
.notify (gdb
);
818 current_program_space
->deleted_solibs
.push_back (gdb
->so_name
);
820 *gdb_link
= gdb
->next
;
822 /* Unless the user loaded it explicitly, free SO's objfile. */
823 if (gdb
->objfile
&& ! (gdb
->objfile
->flags
& OBJF_USERLOADED
)
824 && !solib_used (gdb
))
825 gdb
->objfile
->unlink ();
827 /* Some targets' section tables might be referring to
828 sections from so->abfd; remove them. */
829 current_program_space
->remove_target_sections (gdb
);
836 /* Now the inferior's list contains only shared objects that don't
837 appear in GDB's list --- those that are newly loaded. Add them
838 to GDB's shared object list. */
842 const char *not_found_filename
= NULL
;
846 /* Add the new shared objects to GDB's list. */
847 *gdb_link
= inferior
;
849 /* Fill in the rest of each of the `struct so_list' nodes. */
850 for (i
= inferior
; i
; i
= i
->next
)
853 i
->pspace
= current_program_space
;
854 current_program_space
->added_solibs
.push_back (i
);
858 /* Fill in the rest of the `struct so_list' node. */
859 if (!solib_map_sections (i
))
862 if (not_found_filename
== NULL
)
863 not_found_filename
= i
->so_original_name
;
867 catch (const gdb_exception_error
&e
)
869 exception_fprintf (gdb_stderr
, e
,
870 _("Error while mapping shared "
871 "library sections:\n"));
874 /* Notify any observer that the shared object has been
875 loaded now that we've added it to GDB's tables. */
876 gdb::observers::solib_loaded
.notify (i
);
879 /* If a library was not found, issue an appropriate warning
880 message. We have to use a single call to warning in case the
881 front end does something special with warnings, e.g., pop up
882 a dialog box. It Would Be Nice if we could get a "warning: "
883 prefix on each line in the CLI front end, though - it doesn't
887 warning (_("Could not load shared library symbols for %s.\n"
888 "Do you need \"set solib-search-path\" "
889 "or \"set sysroot\"?"),
891 else if (not_found
> 1)
893 Could not load shared library symbols for %d libraries, e.g. %s.\n\
894 Use the \"info sharedlibrary\" command to see the complete listing.\n\
895 Do you need \"set solib-search-path\" or \"set sysroot\"?"),
896 not_found
, not_found_filename
);
901 /* Return non-zero if NAME is the libpthread shared library.
903 Uses a fairly simplistic heuristic approach where we check
904 the file name against "/libpthread". This can lead to false
905 positives, but this should be good enough in practice.
907 As of glibc-2.34, functions formerly residing in libpthread have
908 been moved to libc, so "/libc." needs to be checked too. (Matching
909 the "." will avoid matching libraries such as libcrypt.) */
912 libpthread_name_p (const char *name
)
914 return (strstr (name
, "/libpthread") != NULL
915 || strstr (name
, "/libc.") != NULL
);
918 /* Return non-zero if SO is the libpthread shared library. */
921 libpthread_solib_p (struct so_list
*so
)
923 return libpthread_name_p (so
->so_name
);
926 /* Read in symbolic information for any shared objects whose names
927 match PATTERN. (If we've already read a shared object's symbol
928 info, leave it alone.) If PATTERN is zero, read them all.
930 If READSYMS is 0, defer reading symbolic information until later
931 but still do any needed low level processing.
933 FROM_TTY is described for update_solib_list, above. */
936 solib_add (const char *pattern
, int from_tty
, int readsyms
)
938 if (print_symbol_loading_p (from_tty
, 0, 0))
942 printf_unfiltered (_("Loading symbols for shared libraries: %s\n"),
946 printf_unfiltered (_("Loading symbols for shared libraries.\n"));
949 current_program_space
->solib_add_generation
++;
953 char *re_err
= re_comp (pattern
);
956 error (_("Invalid regexp: %s"), re_err
);
959 update_solib_list (from_tty
);
961 /* Walk the list of currently loaded shared libraries, and read
962 symbols for any that match the pattern --- or any whose symbols
963 aren't already loaded, if no pattern was given. */
965 bool any_matches
= false;
966 bool loaded_any_symbols
= false;
967 symfile_add_flags add_flags
= SYMFILE_DEFER_BP_RESET
;
970 add_flags
|= SYMFILE_VERBOSE
;
972 for (struct so_list
*gdb
: current_program_space
->solibs ())
973 if (! pattern
|| re_exec (gdb
->so_name
))
975 /* Normally, we would read the symbols from that library
976 only if READSYMS is set. However, we're making a small
977 exception for the pthread library, because we sometimes
978 need the library symbols to be loaded in order to provide
979 thread support (x86-linux for instance). */
980 const int add_this_solib
=
981 (readsyms
|| libpthread_solib_p (gdb
));
986 if (gdb
->symbols_loaded
)
988 /* If no pattern was given, be quiet for shared
989 libraries we have already loaded. */
990 if (pattern
&& (from_tty
|| info_verbose
))
991 printf_unfiltered (_("Symbols already loaded for %s\n"),
994 else if (solib_read_symbols (gdb
, add_flags
))
995 loaded_any_symbols
= true;
999 if (loaded_any_symbols
)
1000 breakpoint_re_set ();
1002 if (from_tty
&& pattern
&& ! any_matches
)
1004 ("No loaded shared libraries match the pattern `%s'.\n", pattern
);
1006 if (loaded_any_symbols
)
1008 /* Getting new symbols may change our opinion about what is
1010 reinit_frame_cache ();
1015 /* Implement the "info sharedlibrary" command. Walk through the
1016 shared library list and print information about each attached
1017 library matching PATTERN. If PATTERN is elided, print them
1021 info_sharedlibrary_command (const char *pattern
, int from_tty
)
1023 bool so_missing_debug_info
= false;
1026 struct gdbarch
*gdbarch
= target_gdbarch ();
1027 struct ui_out
*uiout
= current_uiout
;
1031 char *re_err
= re_comp (pattern
);
1034 error (_("Invalid regexp: %s"), re_err
);
1037 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
1038 addr_width
= 4 + (gdbarch_ptr_bit (gdbarch
) / 4);
1040 update_solib_list (from_tty
);
1042 /* ui_out_emit_table table_emitter needs to know the number of rows,
1043 so we need to make two passes over the libs. */
1046 for (struct so_list
*so
: current_program_space
->solibs ())
1050 if (pattern
&& ! re_exec (so
->so_name
))
1057 ui_out_emit_table
table_emitter (uiout
, 4, nr_libs
, "SharedLibraryTable");
1059 /* The "- 1" is because ui_out adds one space between columns. */
1060 uiout
->table_header (addr_width
- 1, ui_left
, "from", "From");
1061 uiout
->table_header (addr_width
- 1, ui_left
, "to", "To");
1062 uiout
->table_header (12 - 1, ui_left
, "syms-read", "Syms Read");
1063 uiout
->table_header (0, ui_noalign
, "name", "Shared Object Library");
1065 uiout
->table_body ();
1067 for (struct so_list
*so
: current_program_space
->solibs ())
1069 if (! so
->so_name
[0])
1071 if (pattern
&& ! re_exec (so
->so_name
))
1074 ui_out_emit_tuple
tuple_emitter (uiout
, "lib");
1076 if (so
->addr_high
!= 0)
1078 uiout
->field_core_addr ("from", gdbarch
, so
->addr_low
);
1079 uiout
->field_core_addr ("to", gdbarch
, so
->addr_high
);
1083 uiout
->field_skip ("from");
1084 uiout
->field_skip ("to");
1087 if (! top_level_interpreter ()->interp_ui_out ()->is_mi_like_p ()
1088 && so
->symbols_loaded
1089 && !objfile_has_symbols (so
->objfile
))
1091 so_missing_debug_info
= true;
1092 uiout
->field_string ("syms-read", "Yes (*)");
1095 uiout
->field_string ("syms-read", so
->symbols_loaded
? "Yes" : "No");
1097 uiout
->field_string ("name", so
->so_name
, file_name_style
.style ());
1106 uiout
->message (_("No shared libraries matched.\n"));
1108 uiout
->message (_("No shared libraries loaded at this time.\n"));
1112 if (so_missing_debug_info
)
1113 uiout
->message (_("(*): Shared library is missing "
1114 "debugging information.\n"));
1121 solib_contains_address_p (const struct so_list
*const solib
,
1124 if (solib
->sections
== nullptr)
1127 for (target_section
&p
: *solib
->sections
)
1128 if (p
.addr
<= address
&& address
< p
.endaddr
)
1134 /* If ADDRESS is in a shared lib in program space PSPACE, return its
1137 Provides a hook for other gdb routines to discover whether or not a
1138 particular address is within the mapped address space of a shared
1141 For example, this routine is called at one point to disable
1142 breakpoints which are in shared libraries that are not currently
1146 solib_name_from_address (struct program_space
*pspace
, CORE_ADDR address
)
1148 struct so_list
*so
= NULL
;
1150 for (so
= pspace
->so_list
; so
; so
= so
->next
)
1151 if (solib_contains_address_p (so
, address
))
1152 return (so
->so_name
);
1160 solib_keep_data_in_core (CORE_ADDR vaddr
, unsigned long size
)
1162 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1164 if (ops
->keep_data_in_core
)
1165 return ops
->keep_data_in_core (vaddr
, size
) != 0;
1170 /* Called by free_all_symtabs */
1175 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1177 disable_breakpoints_in_shlibs ();
1179 while (current_program_space
->so_list
)
1181 struct so_list
*so
= current_program_space
->so_list
;
1183 current_program_space
->so_list
= so
->next
;
1184 gdb::observers::solib_unloaded
.notify (so
);
1185 current_program_space
->remove_target_sections (so
);
1189 ops
->clear_solib ();
1192 /* Shared library startup support. When GDB starts up the inferior,
1193 it nurses it along (through the shell) until it is ready to execute
1194 its first instruction. At this point, this function gets
1198 solib_create_inferior_hook (int from_tty
)
1200 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1202 ops
->solib_create_inferior_hook (from_tty
);
1208 in_solib_dynsym_resolve_code (CORE_ADDR pc
)
1210 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1212 return ops
->in_dynsym_resolve_code (pc
) != 0;
1215 /* Implements the "sharedlibrary" command. */
1218 sharedlibrary_command (const char *args
, int from_tty
)
1221 solib_add (args
, from_tty
, 1);
1224 /* Implements the command "nosharedlibrary", which discards symbols
1225 that have been auto-loaded from shared libraries. Symbols from
1226 shared libraries that were added by explicit request of the user
1227 are not discarded. Also called from remote.c. */
1230 no_shared_libraries (const char *ignored
, int from_tty
)
1232 /* The order of the two routines below is important: clear_solib notifies
1233 the solib_unloaded observers, and some of these observers might need
1234 access to their associated objfiles. Therefore, we can not purge the
1235 solibs' objfiles before clear_solib has been called. */
1238 objfile_purge_solibs ();
1244 update_solib_breakpoints (void)
1246 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1248 if (ops
->update_breakpoints
!= NULL
)
1249 ops
->update_breakpoints ();
1255 handle_solib_event (void)
1257 const struct target_so_ops
*ops
= solib_ops (target_gdbarch ());
1259 if (ops
->handle_event
!= NULL
)
1260 ops
->handle_event ();
1262 current_inferior ()->pspace
->clear_solib_cache ();
1264 /* Check for any newly added shared libraries if we're supposed to
1265 be adding them automatically. Switch terminal for any messages
1266 produced by breakpoint_re_set. */
1267 target_terminal::ours_for_output ();
1268 solib_add (NULL
, 0, auto_solib_add
);
1269 target_terminal::inferior ();
1272 /* Reload shared libraries, but avoid reloading the same symbol file
1273 we already have loaded. */
1276 reload_shared_libraries_1 (int from_tty
)
1278 if (print_symbol_loading_p (from_tty
, 0, 0))
1279 printf_unfiltered (_("Loading symbols for shared libraries.\n"));
1281 for (struct so_list
*so
: current_program_space
->solibs ())
1283 const char *found_pathname
= NULL
;
1284 bool was_loaded
= so
->symbols_loaded
!= 0;
1285 symfile_add_flags add_flags
= SYMFILE_DEFER_BP_RESET
;
1288 add_flags
|= SYMFILE_VERBOSE
;
1290 gdb::unique_xmalloc_ptr
<char> filename
1291 (tilde_expand (so
->so_original_name
));
1292 gdb_bfd_ref_ptr
abfd (solib_bfd_open (filename
.get ()));
1294 found_pathname
= bfd_get_filename (abfd
.get ());
1296 /* If this shared library is no longer associated with its previous
1297 symbol file, close that. */
1298 if ((found_pathname
== NULL
&& was_loaded
)
1299 || (found_pathname
!= NULL
1300 && filename_cmp (found_pathname
, so
->so_name
) != 0))
1302 if (so
->objfile
&& ! (so
->objfile
->flags
& OBJF_USERLOADED
)
1303 && !solib_used (so
))
1304 so
->objfile
->unlink ();
1305 current_program_space
->remove_target_sections (so
);
1309 /* If this shared library is now associated with a new symbol
1311 if (found_pathname
!= NULL
1313 || filename_cmp (found_pathname
, so
->so_name
) != 0))
1315 bool got_error
= false;
1319 solib_map_sections (so
);
1322 catch (const gdb_exception_error
&e
)
1324 exception_fprintf (gdb_stderr
, e
,
1325 _("Error while mapping "
1326 "shared library sections:\n"));
1331 && (auto_solib_add
|| was_loaded
|| libpthread_solib_p (so
)))
1332 solib_read_symbols (so
, add_flags
);
1338 reload_shared_libraries (const char *ignored
, int from_tty
,
1339 struct cmd_list_element
*e
)
1341 const struct target_so_ops
*ops
;
1343 reload_shared_libraries_1 (from_tty
);
1345 ops
= solib_ops (target_gdbarch ());
1347 /* Creating inferior hooks here has two purposes. First, if we reload
1348 shared libraries then the address of solib breakpoint we've computed
1349 previously might be no longer valid. For example, if we forgot to set
1350 solib-absolute-prefix and are setting it right now, then the previous
1351 breakpoint address is plain wrong. Second, installing solib hooks
1352 also implicitly figures were ld.so is and loads symbols for it.
1353 Absent this call, if we've just connected to a target and set
1354 solib-absolute-prefix or solib-search-path, we'll lose all information
1356 if (target_has_execution ())
1358 /* Reset or free private data structures not associated with
1360 ops
->clear_solib ();
1362 /* Remove any previous solib event breakpoint. This is usually
1363 done in common code, at breakpoint_init_inferior time, but
1364 we're not really starting up the inferior here. */
1365 remove_solib_event_breakpoints ();
1367 solib_create_inferior_hook (from_tty
);
1370 /* Sometimes the platform-specific hook loads initial shared
1371 libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be
1372 incorrectly 0 but such solib targets should be fixed anyway. If we
1373 made all the inferior hook methods consistent, this call could be
1374 removed. Call it only after the solib target has been initialized by
1375 solib_create_inferior_hook. */
1377 solib_add (NULL
, 0, auto_solib_add
);
1379 breakpoint_re_set ();
1381 /* We may have loaded or unloaded debug info for some (or all)
1382 shared libraries. However, frames may still reference them. For
1383 example, a frame's unwinder might still point at DWARF FDE
1384 structures that are now freed. Also, getting new symbols may
1385 change our opinion about what is frameless. */
1386 reinit_frame_cache ();
1389 /* Wrapper for reload_shared_libraries that replaces "remote:"
1390 at the start of gdb_sysroot with "target:". */
1393 gdb_sysroot_changed (const char *ignored
, int from_tty
,
1394 struct cmd_list_element
*e
)
1396 const char *old_prefix
= "remote:";
1397 const char *new_prefix
= TARGET_SYSROOT_PREFIX
;
1399 if (startswith (gdb_sysroot
, old_prefix
))
1401 static bool warning_issued
= false;
1403 gdb_assert (strlen (old_prefix
) == strlen (new_prefix
));
1404 memcpy (gdb_sysroot
, new_prefix
, strlen (new_prefix
));
1406 if (!warning_issued
)
1408 warning (_("\"%s\" is deprecated, use \"%s\" instead."),
1409 old_prefix
, new_prefix
);
1410 warning (_("sysroot set to \"%s\"."), gdb_sysroot
);
1412 warning_issued
= true;
1416 reload_shared_libraries (ignored
, from_tty
, e
);
1420 show_auto_solib_add (struct ui_file
*file
, int from_tty
,
1421 struct cmd_list_element
*c
, const char *value
)
1423 fprintf_filtered (file
, _("Autoloading of shared library symbols is %s.\n"),
1428 /* Lookup the value for a specific symbol from dynamic symbol table. Look
1429 up symbol from ABFD. MATCH_SYM is a callback function to determine
1430 whether to pick up a symbol. DATA is the input of this callback
1431 function. Return NULL if symbol is not found. */
1434 gdb_bfd_lookup_symbol_from_symtab (bfd
*abfd
,
1435 int (*match_sym
) (const asymbol
*,
1439 long storage_needed
= bfd_get_symtab_upper_bound (abfd
);
1440 CORE_ADDR symaddr
= 0;
1442 if (storage_needed
> 0)
1446 gdb::def_vector
<asymbol
*> storage (storage_needed
/ sizeof (asymbol
*));
1447 asymbol
**symbol_table
= storage
.data ();
1448 unsigned int number_of_symbols
=
1449 bfd_canonicalize_symtab (abfd
, symbol_table
);
1451 for (i
= 0; i
< number_of_symbols
; i
++)
1453 asymbol
*sym
= *symbol_table
++;
1455 if (match_sym (sym
, data
))
1457 struct gdbarch
*gdbarch
= target_gdbarch ();
1458 symaddr
= sym
->value
;
1460 /* Some ELF targets fiddle with addresses of symbols they
1461 consider special. They use minimal symbols to do that
1462 and this is needed for correct breakpoint placement,
1463 but we do not have full data here to build a complete
1464 minimal symbol, so just set the address and let the
1465 targets cope with that. */
1466 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1467 && gdbarch_elf_make_msymbol_special_p (gdbarch
))
1469 struct minimal_symbol msym
{};
1471 SET_MSYMBOL_VALUE_ADDRESS (&msym
, symaddr
);
1472 gdbarch_elf_make_msymbol_special (gdbarch
, sym
, &msym
);
1473 symaddr
= MSYMBOL_VALUE_RAW_ADDRESS (&msym
);
1476 /* BFD symbols are section relative. */
1477 symaddr
+= sym
->section
->vma
;
1489 gdb_bfd_scan_elf_dyntag (const int desired_dyntag
, bfd
*abfd
, CORE_ADDR
*ptr
,
1490 CORE_ADDR
*ptr_addr
)
1492 int arch_size
, step
, sect_size
;
1493 long current_dyntag
;
1494 CORE_ADDR dyn_ptr
, dyn_addr
;
1495 gdb_byte
*bufend
, *bufstart
, *buf
;
1496 Elf32_External_Dyn
*x_dynp_32
;
1497 Elf64_External_Dyn
*x_dynp_64
;
1498 struct bfd_section
*sect
;
1503 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
1506 arch_size
= bfd_get_arch_size (abfd
);
1507 if (arch_size
== -1)
1510 /* Find the start address of the .dynamic section. */
1511 sect
= bfd_get_section_by_name (abfd
, ".dynamic");
1516 for (const target_section
&target_section
1517 : current_program_space
->target_sections ())
1518 if (sect
== target_section
.the_bfd_section
)
1520 dyn_addr
= target_section
.addr
;
1526 /* ABFD may come from OBJFILE acting only as a symbol file without being
1527 loaded into the target (see add_symbol_file_command). This case is
1528 such fallback to the file VMA address without the possibility of
1529 having the section relocated to its actual in-memory address. */
1531 dyn_addr
= bfd_section_vma (sect
);
1534 /* Read in .dynamic from the BFD. We will get the actual value
1535 from memory later. */
1536 sect_size
= bfd_section_size (sect
);
1537 buf
= bufstart
= (gdb_byte
*) alloca (sect_size
);
1538 if (!bfd_get_section_contents (abfd
, sect
,
1542 /* Iterate over BUF and scan for DYNTAG. If found, set PTR and return. */
1543 step
= (arch_size
== 32) ? sizeof (Elf32_External_Dyn
)
1544 : sizeof (Elf64_External_Dyn
);
1545 for (bufend
= buf
+ sect_size
;
1549 if (arch_size
== 32)
1551 x_dynp_32
= (Elf32_External_Dyn
*) buf
;
1552 current_dyntag
= bfd_h_get_32 (abfd
, (bfd_byte
*) x_dynp_32
->d_tag
);
1553 dyn_ptr
= bfd_h_get_32 (abfd
, (bfd_byte
*) x_dynp_32
->d_un
.d_ptr
);
1557 x_dynp_64
= (Elf64_External_Dyn
*) buf
;
1558 current_dyntag
= bfd_h_get_64 (abfd
, (bfd_byte
*) x_dynp_64
->d_tag
);
1559 dyn_ptr
= bfd_h_get_64 (abfd
, (bfd_byte
*) x_dynp_64
->d_un
.d_ptr
);
1561 if (current_dyntag
== DT_NULL
)
1563 if (current_dyntag
== desired_dyntag
)
1565 /* If requested, try to read the runtime value of this .dynamic
1569 struct type
*ptr_type
;
1570 gdb_byte ptr_buf
[8];
1571 CORE_ADDR ptr_addr_1
;
1573 ptr_type
= builtin_type (target_gdbarch ())->builtin_data_ptr
;
1574 ptr_addr_1
= dyn_addr
+ (buf
- bufstart
) + arch_size
/ 8;
1575 if (target_read_memory (ptr_addr_1
, ptr_buf
, arch_size
/ 8) == 0)
1576 dyn_ptr
= extract_typed_address (ptr_buf
, ptr_type
);
1579 *ptr_addr
= dyn_addr
+ (buf
- bufstart
);
1588 /* Lookup the value for a specific symbol from symbol table. Look up symbol
1589 from ABFD. MATCH_SYM is a callback function to determine whether to pick
1590 up a symbol. DATA is the input of this callback function. Return NULL
1591 if symbol is not found. */
1594 bfd_lookup_symbol_from_dyn_symtab (bfd
*abfd
,
1595 int (*match_sym
) (const asymbol
*,
1599 long storage_needed
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1600 CORE_ADDR symaddr
= 0;
1602 if (storage_needed
> 0)
1605 gdb::def_vector
<asymbol
*> storage (storage_needed
/ sizeof (asymbol
*));
1606 asymbol
**symbol_table
= storage
.data ();
1607 unsigned int number_of_symbols
=
1608 bfd_canonicalize_dynamic_symtab (abfd
, symbol_table
);
1610 for (i
= 0; i
< number_of_symbols
; i
++)
1612 asymbol
*sym
= *symbol_table
++;
1614 if (match_sym (sym
, data
))
1616 /* BFD symbols are section relative. */
1617 symaddr
= sym
->value
+ sym
->section
->vma
;
1625 /* Lookup the value for a specific symbol from symbol table and dynamic
1626 symbol table. Look up symbol from ABFD. MATCH_SYM is a callback
1627 function to determine whether to pick up a symbol. DATA is the
1628 input of this callback function. Return NULL if symbol is not
1632 gdb_bfd_lookup_symbol (bfd
*abfd
,
1633 int (*match_sym
) (const asymbol
*, const void *),
1636 CORE_ADDR symaddr
= gdb_bfd_lookup_symbol_from_symtab (abfd
, match_sym
, data
);
1638 /* On FreeBSD, the dynamic linker is stripped by default. So we'll
1639 have to check the dynamic string table too. */
1641 symaddr
= bfd_lookup_symbol_from_dyn_symtab (abfd
, match_sym
, data
);
1646 /* The shared library list may contain user-loaded object files that
1647 can be removed out-of-band by the user. So upon notification of
1648 free_objfile remove all references to any user-loaded file that is
1649 about to be freed. */
1652 remove_user_added_objfile (struct objfile
*objfile
)
1654 if (objfile
!= 0 && objfile
->flags
& OBJF_USERLOADED
)
1656 for (struct so_list
*so
: current_program_space
->solibs ())
1657 if (so
->objfile
== objfile
)
1662 void _initialize_solib ();
1664 _initialize_solib ()
1666 solib_data
= gdbarch_data_register_pre_init (solib_init
);
1668 gdb::observers::free_objfile
.attach (remove_user_added_objfile
,
1670 gdb::observers::inferior_execd
.attach ([] (inferior
*inf
)
1672 solib_create_inferior_hook (0);
1675 add_com ("sharedlibrary", class_files
, sharedlibrary_command
,
1676 _("Load shared object library symbols for files matching REGEXP."));
1677 cmd_list_element
*info_sharedlibrary_cmd
1678 = add_info ("sharedlibrary", info_sharedlibrary_command
,
1679 _("Status of loaded shared object libraries."));
1680 add_info_alias ("dll", info_sharedlibrary_cmd
, 1);
1681 add_com ("nosharedlibrary", class_files
, no_shared_libraries
,
1682 _("Unload all shared object library symbols."));
1684 add_setshow_boolean_cmd ("auto-solib-add", class_support
,
1685 &auto_solib_add
, _("\
1686 Set autoloading of shared library symbols."), _("\
1687 Show autoloading of shared library symbols."), _("\
1688 If \"on\", symbols from all shared object libraries will be loaded\n\
1689 automatically when the inferior begins execution, when the dynamic linker\n\
1690 informs gdb that a new library has been loaded, or when attaching to the\n\
1691 inferior. Otherwise, symbols must be loaded manually, using \
1694 show_auto_solib_add
,
1695 &setlist
, &showlist
);
1697 set_show_commands sysroot_cmds
1698 = add_setshow_optional_filename_cmd ("sysroot", class_support
,
1700 Set an alternate system root."), _("\
1701 Show the current system root."), _("\
1702 The system root is used to load absolute shared library symbol files.\n\
1703 For other (relative) files, you can add directories using\n\
1704 `set solib-search-path'."),
1705 gdb_sysroot_changed
,
1707 &setlist
, &showlist
);
1709 add_alias_cmd ("solib-absolute-prefix", sysroot_cmds
.set
, class_support
, 0,
1711 add_alias_cmd ("solib-absolute-prefix", sysroot_cmds
.show
, class_support
, 0,
1714 add_setshow_optional_filename_cmd ("solib-search-path", class_support
,
1715 &solib_search_path
, _("\
1716 Set the search path for loading non-absolute shared library symbol files."),
1718 Show the search path for loading non-absolute shared library symbol files."),
1720 This takes precedence over the environment variables \
1721 PATH and LD_LIBRARY_PATH."),
1722 reload_shared_libraries
,
1723 show_solib_search_path
,
1724 &setlist
, &showlist
);