1 /* Handle shared libraries for GDB, the GNU Debugger.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
26 #include "gdb_string.h"
31 #include "exceptions.h"
36 #include "gdb_regex.h"
41 #include "completer.h"
42 #include "filenames.h" /* for DOSish file names */
46 #include "readline/readline.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 struct target_so_ops
*
67 solib_ops (struct gdbarch
*gdbarch
)
69 struct target_so_ops
**ops
= gdbarch_data (gdbarch
, solib_data
);
73 /* Set the solib operations for GDBARCH to NEW_OPS. */
76 set_solib_ops (struct gdbarch
*gdbarch
, struct target_so_ops
*new_ops
)
78 struct target_so_ops
**ops
= gdbarch_data (gdbarch
, solib_data
);
83 /* external data declarations */
85 /* FIXME: gdbarch needs to control this variable, or else every
86 configuration needs to call set_solib_ops. */
87 struct target_so_ops
*current_target_so_ops
;
89 /* List of known shared objects */
90 #define so_list_head current_program_space->so_list
92 /* Local function prototypes */
94 /* If non-empty, this is a search path for loading non-absolute shared library
95 symbol files. This takes precedence over the environment variables PATH
96 and LD_LIBRARY_PATH. */
97 static char *solib_search_path
= NULL
;
99 show_solib_search_path (struct ui_file
*file
, int from_tty
,
100 struct cmd_list_element
*c
, const char *value
)
102 fprintf_filtered (file
, _("\
103 The search path for loading non-absolute shared library symbol files is %s.\n"),
111 solib_find -- Find a shared library file.
115 char *solib_find (char *in_pathname, int *fd);
119 Global variable GDB_SYSROOT is used as a prefix directory
120 to search for shared libraries if they have an absolute path.
122 Global variable SOLIB_SEARCH_PATH is used as a prefix directory
123 (or set of directories, as in LD_LIBRARY_PATH) to search for all
124 shared libraries if not found in GDB_SYSROOT.
127 * If there is a gdb_sysroot and path is absolute:
128 * Search for gdb_sysroot/path.
130 * Look for it literally (unmodified).
131 * Look in SOLIB_SEARCH_PATH.
132 * If available, use target defined search function.
133 * If gdb_sysroot is NOT set, perform the following two searches:
134 * Look in inferior's $PATH.
135 * Look in inferior's $LD_LIBRARY_PATH.
137 * The last check avoids doing this search when targetting remote
138 * machines since gdb_sysroot will almost always be set.
142 Full pathname of the shared library file, or NULL if not found.
143 (The pathname is malloc'ed; it needs to be freed by the caller.)
144 *FD is set to either -1 or an open file handle for the library. */
147 solib_find (char *in_pathname
, int *fd
)
149 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
151 char *temp_pathname
= NULL
;
152 int gdb_sysroot_is_empty
;
153 const char *solib_symbols_extension
154 = gdbarch_solib_symbols_extension (target_gdbarch
);
156 /* If solib_symbols_extension is set, replace the file's
158 if (solib_symbols_extension
)
160 char *p
= in_pathname
+ strlen (in_pathname
);
161 while (p
> in_pathname
&& *p
!= '.')
168 new_pathname
= alloca (p
- in_pathname
+ 1
169 + strlen (solib_symbols_extension
) + 1);
170 memcpy (new_pathname
, in_pathname
, p
- in_pathname
+ 1);
171 strcpy (new_pathname
+ (p
- in_pathname
) + 1,
172 solib_symbols_extension
);
174 in_pathname
= new_pathname
;
178 gdb_sysroot_is_empty
= (gdb_sysroot
== NULL
|| *gdb_sysroot
== 0);
180 if (! IS_ABSOLUTE_PATH (in_pathname
) || gdb_sysroot_is_empty
)
181 temp_pathname
= in_pathname
;
184 int prefix_len
= strlen (gdb_sysroot
);
186 /* Remove trailing slashes from absolute prefix. */
187 while (prefix_len
> 0
188 && IS_DIR_SEPARATOR (gdb_sysroot
[prefix_len
- 1]))
191 /* Cat the prefixed pathname together. */
192 temp_pathname
= alloca (prefix_len
+ strlen (in_pathname
) + 1);
193 strncpy (temp_pathname
, gdb_sysroot
, prefix_len
);
194 temp_pathname
[prefix_len
] = '\0';
195 strcat (temp_pathname
, in_pathname
);
198 /* Handle remote files. */
199 if (remote_filename_p (temp_pathname
))
202 return xstrdup (temp_pathname
);
205 /* Now see if we can open it. */
206 found_file
= open (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
208 /* We try to find the library in various ways. After each attempt
209 (except for the one above), either found_file >= 0 and
210 temp_pathname is a malloc'd string, or found_file < 0 and
211 temp_pathname does not point to storage that needs to be
215 temp_pathname
= NULL
;
217 temp_pathname
= xstrdup (temp_pathname
);
219 /* If the search in gdb_sysroot failed, and the path name is
220 absolute at this point, make it relative. (openp will try and open the
221 file according to its absolute path otherwise, which is not what we want.)
222 Affects subsequent searches for this solib. */
223 if (found_file
< 0 && IS_ABSOLUTE_PATH (in_pathname
))
225 /* First, get rid of any drive letters etc. */
226 while (!IS_DIR_SEPARATOR (*in_pathname
))
229 /* Next, get rid of all leading dir separators. */
230 while (IS_DIR_SEPARATOR (*in_pathname
))
234 /* If not found, search the solib_search_path (if any). */
235 if (found_file
< 0 && solib_search_path
!= NULL
)
236 found_file
= openp (solib_search_path
, OPF_TRY_CWD_FIRST
,
237 in_pathname
, O_RDONLY
| O_BINARY
, &temp_pathname
);
239 /* If not found, next search the solib_search_path (if any) for the basename
240 only (ignoring the path). This is to allow reading solibs from a path
241 that differs from the opened path. */
242 if (found_file
< 0 && solib_search_path
!= NULL
)
243 found_file
= openp (solib_search_path
, OPF_TRY_CWD_FIRST
,
244 lbasename (in_pathname
), O_RDONLY
| O_BINARY
,
247 /* If not found, try to use target supplied solib search method */
248 if (found_file
< 0 && ops
->find_and_open_solib
)
249 found_file
= ops
->find_and_open_solib (in_pathname
, O_RDONLY
| O_BINARY
,
252 /* If not found, next search the inferior's $PATH environment variable. */
253 if (found_file
< 0 && gdb_sysroot_is_empty
)
254 found_file
= openp (get_in_environ (current_inferior ()->environment
,
256 OPF_TRY_CWD_FIRST
, in_pathname
, O_RDONLY
| O_BINARY
,
259 /* If not found, next search the inferior's $LD_LIBRARY_PATH
260 environment variable. */
261 if (found_file
< 0 && gdb_sysroot_is_empty
)
262 found_file
= openp (get_in_environ (current_inferior ()->environment
,
264 OPF_TRY_CWD_FIRST
, in_pathname
, O_RDONLY
| O_BINARY
,
268 return temp_pathname
;
271 /* Open and return a BFD for the shared library PATHNAME. If FD is not -1,
272 it is used as file handle to open the file. Throws an error if the file
273 could not be opened. Handles both local and remote file access.
275 PATHNAME must be malloc'ed by the caller. If successful, the new BFD's
276 name will point to it. If unsuccessful, PATHNAME will be freed and the
277 FD will be closed (unless FD was -1). */
280 solib_bfd_fopen (char *pathname
, int fd
)
284 if (remote_filename_p (pathname
))
286 gdb_assert (fd
== -1);
287 abfd
= remote_bfd_open (pathname
, gnutarget
);
291 abfd
= bfd_fopen (pathname
, gnutarget
, FOPEN_RB
, fd
);
294 bfd_set_cacheable (abfd
, 1);
301 make_cleanup (xfree
, pathname
);
302 error (_("Could not open `%s' as an executable file: %s"),
303 pathname
, bfd_errmsg (bfd_get_error ()));
309 /* Find shared library PATHNAME and open a BFD for it. */
312 solib_bfd_open (char *pathname
)
314 char *found_pathname
;
317 const struct bfd_arch_info
*b
;
319 /* Search for shared library file. */
320 found_pathname
= solib_find (pathname
, &found_file
);
321 if (found_pathname
== NULL
)
322 perror_with_name (pathname
);
324 /* Open bfd for shared library. */
325 abfd
= solib_bfd_fopen (found_pathname
, found_file
);
327 /* Check bfd format. */
328 if (!bfd_check_format (abfd
, bfd_object
))
331 make_cleanup (xfree
, found_pathname
);
332 error (_("`%s': not in executable format: %s"),
333 found_pathname
, bfd_errmsg (bfd_get_error ()));
336 /* Check bfd arch. */
337 b
= gdbarch_bfd_arch_info (target_gdbarch
);
338 if (!b
->compatible (b
, bfd_get_arch_info (abfd
)))
339 warning (_("`%s': Shared library architecture %s is not compatible "
340 "with target architecture %s."), found_pathname
,
341 bfd_get_arch_info (abfd
)->printable_name
, b
->printable_name
);
351 solib_map_sections -- open bfd and build sections for shared lib
355 static int solib_map_sections (struct so_list *so)
359 Given a pointer to one of the shared objects in our list
360 of mapped objects, use the recorded name to open a bfd
361 descriptor for the object, build a section table, and then
362 relocate all the section addresses by the base address at
363 which the shared object was mapped.
367 In most (all?) cases the shared object file name recorded in the
368 dynamic linkage tables will be a fully qualified pathname. For
369 cases where it isn't, do we really mimic the systems search
370 mechanism correctly in the below code (particularly the tilde
375 solib_map_sections (void *arg
)
377 struct so_list
*so
= (struct so_list
*) arg
; /* catch_errors bogon */
378 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
380 struct target_section
*p
;
381 struct cleanup
*old_chain
;
384 filename
= tilde_expand (so
->so_name
);
385 old_chain
= make_cleanup (xfree
, filename
);
386 abfd
= ops
->bfd_open (filename
);
387 do_cleanups (old_chain
);
389 /* Leave bfd open, core_xfer_memory and "info files" need it. */
390 so
->abfd
= gdb_bfd_ref (abfd
);
392 /* copy full path name into so_name, so that later symbol_file_add
394 if (strlen (bfd_get_filename (abfd
)) >= SO_NAME_MAX_PATH_SIZE
)
395 error (_("Shared library file name is too long."));
396 strcpy (so
->so_name
, bfd_get_filename (abfd
));
398 if (build_section_table (abfd
, &so
->sections
, &so
->sections_end
))
400 error (_("Can't find the file sections in `%s': %s"),
401 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
404 for (p
= so
->sections
; p
< so
->sections_end
; p
++)
406 /* Relocate the section binding addresses as recorded in the shared
407 object's file by the base address to which the object was actually
409 ops
->relocate_section_addresses (so
, p
);
411 /* If the target didn't provide information about the address
412 range of the shared object, assume we want the location of
413 the .text section. */
414 if (so
->addr_low
== 0 && so
->addr_high
== 0
415 && strcmp (p
->the_bfd_section
->name
, ".text") == 0)
417 so
->addr_low
= p
->addr
;
418 so
->addr_high
= p
->endaddr
;
427 free_so --- free a `struct so_list' object
431 void free_so (struct so_list *so)
435 Free the storage associated with the `struct so_list' object SO.
436 If we have opened a BFD for SO, close it.
438 The caller is responsible for removing SO from whatever list it is
439 a member of. If we have placed SO's sections in some target's
440 section table, the caller is responsible for removing them.
442 This function doesn't mess with objfiles at all. If there is an
443 objfile associated with SO that needs to be removed, the caller is
444 responsible for taking care of that. */
447 free_so (struct so_list
*so
)
449 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
452 xfree (so
->sections
);
454 gdb_bfd_unref (so
->abfd
);
462 /* Return address of first so_list entry in master shared object list. */
464 master_so_list (void)
470 symbol_add_stub (struct so_list
*so
, int flags
)
472 struct section_addr_info
*sap
;
474 /* Have we already loaded this shared object? */
475 ALL_OBJFILES (so
->objfile
)
477 if (strcmp (so
->objfile
->name
, so
->so_name
) == 0)
481 sap
= build_section_addr_info_from_section_table (so
->sections
,
484 so
->objfile
= symbol_file_add_from_bfd (so
->abfd
, flags
, sap
, OBJF_SHARED
);
485 free_section_addr_info (sap
);
490 /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS,
491 be chatty about it. Return non-zero if any symbols were actually
495 solib_read_symbols (struct so_list
*so
, int flags
)
497 const int from_tty
= flags
& SYMFILE_VERBOSE
;
499 if (so
->symbols_loaded
)
501 if (from_tty
|| info_verbose
)
502 printf_unfiltered (_("Symbols already loaded for %s\n"), so
->so_name
);
504 else if (so
->abfd
== NULL
)
506 if (from_tty
|| info_verbose
)
507 printf_unfiltered (_("Symbol file not found for %s\n"), so
->so_name
);
511 volatile struct gdb_exception exception
;
512 TRY_CATCH (exception
, RETURN_MASK_ALL
)
514 symbol_add_stub (so
, flags
);
516 if (exception
.reason
!= 0)
518 exception_fprintf (gdb_stderr
, exception
,
519 "Error while reading shared library symbols:\n");
522 if (from_tty
|| info_verbose
)
523 printf_unfiltered (_("Loaded symbols for %s\n"), so
->so_name
);
524 so
->symbols_loaded
= 1;
533 update_solib_list --- synchronize GDB's shared object list with inferior's
537 void update_solib_list (int from_tty, struct target_ops *TARGET)
539 Extract the list of currently loaded shared objects from the
540 inferior, and compare it with the list of shared objects currently
541 in GDB's so_list_head list. Edit so_list_head to bring it in sync
542 with the inferior's new list.
544 If we notice that the inferior has unloaded some shared objects,
545 free any symbolic info GDB had read about those shared objects.
547 Don't load symbolic info for any new shared objects; just add them
548 to the list, and leave their symbols_loaded flag clear.
550 If FROM_TTY is non-null, feel free to print messages about what
553 If TARGET is non-null, add the sections of all new shared objects
554 to TARGET's section table. Note that this doesn't remove any
555 sections for shared objects that have been unloaded, and it
556 doesn't check to see if the new shared objects are already present in
557 the section table. But we only use this for core files and
558 processes we've just attached to, so that's okay. */
561 update_solib_list (int from_tty
, struct target_ops
*target
)
563 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
564 struct so_list
*inferior
= ops
->current_sos();
565 struct so_list
*gdb
, **gdb_link
;
567 /* We can reach here due to changing solib-search-path or the
568 sysroot, before having any inferior. */
569 if (target_has_execution
&& !ptid_equal (inferior_ptid
, null_ptid
))
571 struct inferior
*inf
= current_inferior ();
573 /* If we are attaching to a running process for which we
574 have not opened a symbol file, we may be able to get its
576 if (inf
->attach_flag
&& symfile_objfile
== NULL
)
577 catch_errors (ops
->open_symbol_file_object
, &from_tty
,
578 "Error reading attached process's symbol file.\n",
582 /* GDB and the inferior's dynamic linker each maintain their own
583 list of currently loaded shared objects; we want to bring the
584 former in sync with the latter. Scan both lists, seeing which
585 shared objects appear where. There are three cases:
587 - A shared object appears on both lists. This means that GDB
588 knows about it already, and it's still loaded in the inferior.
589 Nothing needs to happen.
591 - A shared object appears only on GDB's list. This means that
592 the inferior has unloaded it. We should remove the shared
593 object from GDB's tables.
595 - A shared object appears only on the inferior's list. This
596 means that it's just been loaded. We should add it to GDB's
599 So we walk GDB's list, checking each entry to see if it appears
600 in the inferior's list too. If it does, no action is needed, and
601 we remove it from the inferior's list. If it doesn't, the
602 inferior has unloaded it, and we remove it from GDB's list. By
603 the time we're done walking GDB's list, the inferior's list
604 contains only the new shared objects, which we then add. */
607 gdb_link
= &so_list_head
;
610 struct so_list
*i
= inferior
;
611 struct so_list
**i_link
= &inferior
;
613 /* Check to see whether the shared object *gdb also appears in
614 the inferior's current list. */
619 if (ops
->same (gdb
, i
))
624 if (! strcmp (gdb
->so_original_name
, i
->so_original_name
))
632 /* If the shared object appears on the inferior's list too, then
633 it's still loaded, so we don't need to do anything. Delete
634 it from the inferior's list, and leave it on GDB's list. */
639 gdb_link
= &gdb
->next
;
643 /* If it's not on the inferior's list, remove it from GDB's tables. */
646 /* Notify any observer that the shared object has been
647 unloaded before we remove it from GDB's tables. */
648 observer_notify_solib_unloaded (gdb
);
650 *gdb_link
= gdb
->next
;
652 /* Unless the user loaded it explicitly, free SO's objfile. */
653 if (gdb
->objfile
&& ! (gdb
->objfile
->flags
& OBJF_USERLOADED
))
654 free_objfile (gdb
->objfile
);
656 /* Some targets' section tables might be referring to
657 sections from so->abfd; remove them. */
658 remove_target_sections (gdb
->abfd
);
665 /* Now the inferior's list contains only shared objects that don't
666 appear in GDB's list --- those that are newly loaded. Add them
667 to GDB's shared object list. */
672 /* Add the new shared objects to GDB's list. */
673 *gdb_link
= inferior
;
675 /* Fill in the rest of each of the `struct so_list' nodes. */
676 for (i
= inferior
; i
; i
= i
->next
)
678 i
->from_tty
= from_tty
;
679 i
->pspace
= current_program_space
;
681 /* Fill in the rest of the `struct so_list' node. */
682 catch_errors (solib_map_sections
, i
,
683 "Error while mapping shared library sections:\n",
686 /* Add the shared object's sections to the current set of
687 file section tables. Do this immediately after mapping
688 the object so that later nodes in the list can query this
689 object, as is needed in solib-osf.c. */
690 add_target_sections (i
->sections
, i
->sections_end
);
692 /* Notify any observer that the shared object has been
693 loaded now that we've added it to GDB's tables. */
694 observer_notify_solib_loaded (i
);
700 /* Return non-zero if NAME is the libpthread shared library.
702 Uses a fairly simplistic heuristic approach where we check
703 the file name against "/libpthread". This can lead to false
704 positives, but this should be good enough in practice. */
707 libpthread_name_p (const char *name
)
709 return (strstr (name
, "/libpthread") != NULL
);
712 /* Return non-zero if SO is the libpthread shared library. */
715 libpthread_solib_p (struct so_list
*so
)
717 return libpthread_name_p (so
->so_name
);
722 solib_add -- read in symbol info for newly added shared libraries
726 void solib_add (char *pattern, int from_tty, struct target_ops
727 *TARGET, int readsyms)
731 Read in symbolic information for any shared objects whose names
732 match PATTERN. (If we've already read a shared object's symbol
733 info, leave it alone.) If PATTERN is zero, read them all.
735 If READSYMS is 0, defer reading symbolic information until later
736 but still do any needed low level processing.
738 FROM_TTY and TARGET are as described for update_solib_list, above. */
741 solib_add (char *pattern
, int from_tty
, struct target_ops
*target
, int readsyms
)
747 char *re_err
= re_comp (pattern
);
750 error (_("Invalid regexp: %s"), re_err
);
753 update_solib_list (from_tty
, target
);
755 /* Walk the list of currently loaded shared libraries, and read
756 symbols for any that match the pattern --- or any whose symbols
757 aren't already loaded, if no pattern was given. */
760 int loaded_any_symbols
= 0;
762 SYMFILE_DEFER_BP_RESET
| (from_tty
? SYMFILE_VERBOSE
: 0);
764 for (gdb
= so_list_head
; gdb
; gdb
= gdb
->next
)
765 if (! pattern
|| re_exec (gdb
->so_name
))
767 /* Normally, we would read the symbols from that library
768 only if READSYMS is set. However, we're making a small
769 exception for the pthread library, because we sometimes
770 need the library symbols to be loaded in order to provide
771 thread support (x86-linux for instance). */
772 const int add_this_solib
=
773 (readsyms
|| libpthread_solib_p (gdb
));
776 if (add_this_solib
&& solib_read_symbols (gdb
, flags
))
777 loaded_any_symbols
= 1;
780 if (loaded_any_symbols
)
781 breakpoint_re_set ();
783 if (from_tty
&& pattern
&& ! any_matches
)
785 ("No loaded shared libraries match the pattern `%s'.\n", pattern
);
787 if (loaded_any_symbols
)
789 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
791 /* Getting new symbols may change our opinion about what is
793 reinit_frame_cache ();
795 ops
->special_symbol_handling ();
805 info_sharedlibrary_command -- code for "info sharedlibrary"
809 static void info_sharedlibrary_command ()
813 Walk through the shared library list and print information
814 about each attached library matching PATTERN. If PATTERN is elided,
819 info_sharedlibrary_command (char *pattern
, int from_tty
)
821 struct so_list
*so
= NULL
; /* link map state variable */
823 int so_missing_debug_info
= 0;
826 struct cleanup
*table_cleanup
;
827 struct gdbarch
*gdbarch
= target_gdbarch
;
831 char *re_err
= re_comp (pattern
);
834 error (_("Invalid regexp: %s"), re_err
);
837 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
838 addr_width
= 4 + (gdbarch_ptr_bit (gdbarch
) / 4);
840 update_solib_list (from_tty
, 0);
842 /* make_cleanup_ui_out_table_begin_end needs to know the number of
843 rows, so we need to make two passes over the libs. */
845 for (nr_libs
= 0, so
= so_list_head
; so
; so
= so
->next
)
849 if (pattern
&& ! re_exec (so
->so_name
))
856 make_cleanup_ui_out_table_begin_end (uiout
, 4, nr_libs
,
857 "SharedLibraryTable");
859 /* The "- 1" is because ui_out adds one space between columns. */
860 ui_out_table_header (uiout
, addr_width
- 1, ui_left
, "from", "From");
861 ui_out_table_header (uiout
, addr_width
- 1, ui_left
, "to", "To");
862 ui_out_table_header (uiout
, 12 - 1, ui_left
, "syms-read", "Syms Read");
863 ui_out_table_header (uiout
, 0, ui_noalign
,
864 "name", "Shared Object Library");
866 ui_out_table_body (uiout
);
868 for (so
= so_list_head
; so
; so
= so
->next
)
870 struct cleanup
*lib_cleanup
;
872 if (! so
->so_name
[0])
874 if (pattern
&& ! re_exec (so
->so_name
))
877 lib_cleanup
= make_cleanup_ui_out_tuple_begin_end (uiout
, "lib");
879 if (so
->addr_high
!= 0)
881 ui_out_field_core_addr (uiout
, "from", gdbarch
, so
->addr_low
);
882 ui_out_field_core_addr (uiout
, "to", gdbarch
, so
->addr_high
);
886 ui_out_field_skip (uiout
, "from");
887 ui_out_field_skip (uiout
, "to");
890 if (! ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ()))
891 && so
->symbols_loaded
892 && !objfile_has_symbols (so
->objfile
))
894 so_missing_debug_info
= 1;
895 ui_out_field_string (uiout
, "syms-read", "Yes (*)");
898 ui_out_field_string (uiout
, "syms-read",
899 so
->symbols_loaded
? "Yes" : "No");
901 ui_out_field_string (uiout
, "name", so
->so_name
);
903 ui_out_text (uiout
, "\n");
905 do_cleanups (lib_cleanup
);
908 do_cleanups (table_cleanup
);
913 ui_out_message (uiout
, 0,
914 _("No shared libraries matched.\n"));
916 ui_out_message (uiout
, 0,
917 _("No shared libraries loaded at this time.\n"));
921 if (so_missing_debug_info
)
922 ui_out_message (uiout
, 0,
923 _("(*): Shared library is missing debugging information.\n"));
927 /* Return 1 if ADDRESS lies within SOLIB. */
930 solib_contains_address_p (const struct so_list
*const solib
,
933 struct target_section
*p
;
935 for (p
= solib
->sections
; p
< solib
->sections_end
; p
++)
936 if (p
->addr
<= address
&& address
< p
->endaddr
)
946 solib_name_from_address -- if an address is in a shared lib, return
951 char * solib_name_from_address (CORE_ADDR address)
955 Provides a hook for other gdb routines to discover whether or
956 not a particular address is within the mapped address space of
959 For example, this routine is called at one point to disable
960 breakpoints which are in shared libraries that are not currently
965 solib_name_from_address (struct program_space
*pspace
, CORE_ADDR address
)
967 struct so_list
*so
= NULL
;
969 for (so
= pspace
->so_list
; so
; so
= so
->next
)
970 if (solib_contains_address_p (so
, address
))
971 return (so
->so_name
);
976 /* Return whether the data starting at VADDR, size SIZE, must be kept
977 in a core file for shared libraries loaded before "gcore" is used
978 to be handled correctly when the core file is loaded. This only
979 applies when the section would otherwise not be kept in the core
980 file (in particular, for readonly sections). */
983 solib_keep_data_in_core (CORE_ADDR vaddr
, unsigned long size
)
985 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
987 if (ops
->keep_data_in_core
)
988 return ops
->keep_data_in_core (vaddr
, size
);
993 /* Called by free_all_symtabs */
998 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
1000 /* This function is expected to handle ELF shared libraries. It is
1001 also used on Solaris, which can run either ELF or a.out binaries
1002 (for compatibility with SunOS 4), both of which can use shared
1003 libraries. So we don't know whether we have an ELF executable or
1004 an a.out executable until the user chooses an executable file.
1006 ELF shared libraries don't get mapped into the address space
1007 until after the program starts, so we'd better not try to insert
1008 breakpoints in them immediately. We have to wait until the
1009 dynamic linker has loaded them; we'll hit a bp_shlib_event
1010 breakpoint (look for calls to create_solib_event_breakpoint) when
1013 SunOS shared libraries seem to be different --- they're present
1014 as soon as the process begins execution, so there's no need to
1015 put off inserting breakpoints. There's also nowhere to put a
1016 bp_shlib_event breakpoint, so if we put it off, we'll never get
1019 So: disable breakpoints only if we're using ELF shared libs. */
1020 if (exec_bfd
!= NULL
1021 && bfd_get_flavour (exec_bfd
) != bfd_target_aout_flavour
)
1022 disable_breakpoints_in_shlibs ();
1024 while (so_list_head
)
1026 struct so_list
*so
= so_list_head
;
1027 so_list_head
= so
->next
;
1028 observer_notify_solib_unloaded (so
);
1030 remove_target_sections (so
->abfd
);
1034 ops
->clear_solib ();
1039 solib_create_inferior_hook -- shared library startup support
1043 void solib_create_inferior_hook (int from_tty)
1047 When gdb starts up the inferior, it nurses it along (through the
1048 shell) until it is ready to execute it's first instruction. At this
1049 point, this function gets called via expansion of the macro
1050 SOLIB_CREATE_INFERIOR_HOOK. */
1053 solib_create_inferior_hook (int from_tty
)
1055 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
1056 ops
->solib_create_inferior_hook (from_tty
);
1061 in_solib_dynsym_resolve_code -- check to see if an address is in
1062 dynamic loader's dynamic symbol
1067 int in_solib_dynsym_resolve_code (CORE_ADDR pc)
1071 Determine if PC is in the dynamic linker's symbol resolution
1072 code. Return 1 if so, 0 otherwise.
1076 in_solib_dynsym_resolve_code (CORE_ADDR pc
)
1078 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
1079 return ops
->in_dynsym_resolve_code (pc
);
1086 sharedlibrary_command -- handle command to explicitly add library
1090 static void sharedlibrary_command (char *args, int from_tty)
1097 sharedlibrary_command (char *args
, int from_tty
)
1100 solib_add (args
, from_tty
, (struct target_ops
*) 0, 1);
1105 no_shared_libraries -- handle command to explicitly discard symbols
1106 from shared libraries.
1110 Implements the command "nosharedlibrary", which discards symbols
1111 that have been auto-loaded from shared libraries. Symbols from
1112 shared libraries that were added by explicit request of the user
1113 are not discarded. Also called from remote.c. */
1116 no_shared_libraries (char *ignored
, int from_tty
)
1118 /* The order of the two routines below is important: clear_solib notifies
1119 the solib_unloaded observers, and some of these observers might need
1120 access to their associated objfiles. Therefore, we can not purge the
1121 solibs' objfiles before clear_solib has been called. */
1124 objfile_purge_solibs ();
1128 reload_shared_libraries (char *ignored
, int from_tty
,
1129 struct cmd_list_element
*e
)
1131 no_shared_libraries (NULL
, from_tty
);
1132 /* Creating inferior hooks here has two purposes. First, if we reload
1133 shared libraries then the address of solib breakpoint we've computed
1134 previously might be no longer valid. For example, if we forgot to set
1135 solib-absolute-prefix and are setting it right now, then the previous
1136 breakpoint address is plain wrong. Second, installing solib hooks
1137 also implicitly figures were ld.so is and loads symbols for it.
1138 Absent this call, if we've just connected to a target and set
1139 solib-absolute-prefix or solib-search-path, we'll lose all information
1141 if (target_has_execution
)
1143 #ifdef SOLIB_CREATE_INFERIOR_HOOK
1144 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
1146 solib_create_inferior_hook (from_tty
);
1150 /* Sometimes the platform-specific hook loads initial shared
1151 libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be
1152 incorrectly 0 but such solib targets should be fixed anyway. If we
1153 made all the inferior hook methods consistent, this call could be
1154 removed. Call it only after the solib target has been initialized by
1155 solib_create_inferior_hook. */
1157 solib_add (NULL
, 0, NULL
, auto_solib_add
);
1159 /* We have unloaded and then reloaded debug info for all shared libraries.
1160 However, frames may still reference them, for example a frame's
1161 unwinder might still point of DWARF FDE structures that are now freed.
1162 Reinit frame cache to avoid crashing. */
1163 reinit_frame_cache ();
1167 show_auto_solib_add (struct ui_file
*file
, int from_tty
,
1168 struct cmd_list_element
*c
, const char *value
)
1170 fprintf_filtered (file
, _("Autoloading of shared library symbols is %s.\n"),
1175 /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call
1176 the library-specific handler if it is installed for the current target. */
1179 solib_global_lookup (const struct objfile
*objfile
,
1181 const domain_enum domain
)
1183 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
1185 if (ops
->lookup_lib_global_symbol
!= NULL
)
1186 return ops
->lookup_lib_global_symbol (objfile
, name
, domain
);
1191 extern initialize_file_ftype _initialize_solib
; /* -Wmissing-prototypes */
1194 _initialize_solib (void)
1196 struct cmd_list_element
*c
;
1198 solib_data
= gdbarch_data_register_pre_init (solib_init
);
1200 add_com ("sharedlibrary", class_files
, sharedlibrary_command
,
1201 _("Load shared object library symbols for files matching REGEXP."));
1202 add_info ("sharedlibrary", info_sharedlibrary_command
,
1203 _("Status of loaded shared object libraries."));
1204 add_com ("nosharedlibrary", class_files
, no_shared_libraries
,
1205 _("Unload all shared object library symbols."));
1207 add_setshow_boolean_cmd ("auto-solib-add", class_support
,
1208 &auto_solib_add
, _("\
1209 Set autoloading of shared library symbols."), _("\
1210 Show autoloading of shared library symbols."), _("\
1211 If \"on\", symbols from all shared object libraries will be loaded\n\
1212 automatically when the inferior begins execution, when the dynamic linker\n\
1213 informs gdb that a new library has been loaded, or when attaching to the\n\
1214 inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."),
1216 show_auto_solib_add
,
1217 &setlist
, &showlist
);
1219 add_setshow_filename_cmd ("sysroot", class_support
,
1221 Set an alternate system root."), _("\
1222 Show the current system root."), _("\
1223 The system root is used to load absolute shared library symbol files.\n\
1224 For other (relative) files, you can add directories using\n\
1225 `set solib-search-path'."),
1226 reload_shared_libraries
,
1228 &setlist
, &showlist
);
1230 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1232 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1235 add_setshow_optional_filename_cmd ("solib-search-path", class_support
,
1236 &solib_search_path
, _("\
1237 Set the search path for loading non-absolute shared library symbol files."), _("\
1238 Show the search path for loading non-absolute shared library symbol files."), _("\
1239 This takes precedence over the environment variables PATH and LD_LIBRARY_PATH."),
1240 reload_shared_libraries
,
1241 show_solib_search_path
,
1242 &setlist
, &showlist
);