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
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"
50 /* Architecture-specific operations. */
52 /* Per-architecture data key. */
53 static struct gdbarch_data
*solib_data
;
56 solib_init (struct obstack
*obstack
)
58 struct target_so_ops
**ops
;
60 ops
= OBSTACK_ZALLOC (obstack
, struct target_so_ops
*);
61 *ops
= current_target_so_ops
;
65 static struct target_so_ops
*
66 solib_ops (struct gdbarch
*gdbarch
)
68 struct target_so_ops
**ops
= gdbarch_data (gdbarch
, solib_data
);
72 /* Set the solib operations for GDBARCH to NEW_OPS. */
75 set_solib_ops (struct gdbarch
*gdbarch
, struct target_so_ops
*new_ops
)
77 struct target_so_ops
**ops
= gdbarch_data (gdbarch
, solib_data
);
82 /* external data declarations */
84 /* FIXME: gdbarch needs to control this variable, or else every
85 configuration needs to call set_solib_ops. */
86 struct target_so_ops
*current_target_so_ops
;
88 /* local data declarations */
90 static struct so_list
*so_list_head
; /* List of known shared objects */
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
;
154 gdb_sysroot_is_empty
= (gdb_sysroot
== NULL
|| *gdb_sysroot
== 0);
156 if (! IS_ABSOLUTE_PATH (in_pathname
) || gdb_sysroot_is_empty
)
157 temp_pathname
= in_pathname
;
160 int prefix_len
= strlen (gdb_sysroot
);
162 /* Remove trailing slashes from absolute prefix. */
163 while (prefix_len
> 0
164 && IS_DIR_SEPARATOR (gdb_sysroot
[prefix_len
- 1]))
167 /* Cat the prefixed pathname together. */
168 temp_pathname
= alloca (prefix_len
+ strlen (in_pathname
) + 1);
169 strncpy (temp_pathname
, gdb_sysroot
, prefix_len
);
170 temp_pathname
[prefix_len
] = '\0';
171 strcat (temp_pathname
, in_pathname
);
174 /* Handle remote files. */
175 if (remote_filename_p (temp_pathname
))
178 return xstrdup (temp_pathname
);
181 /* Now see if we can open it. */
182 found_file
= open (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
184 /* We try to find the library in various ways. After each attempt
185 (except for the one above), either found_file >= 0 and
186 temp_pathname is a malloc'd string, or found_file < 0 and
187 temp_pathname does not point to storage that needs to be
191 temp_pathname
= NULL
;
193 temp_pathname
= xstrdup (temp_pathname
);
195 /* If the search in gdb_sysroot failed, and the path name is
196 absolute at this point, make it relative. (openp will try and open the
197 file according to its absolute path otherwise, which is not what we want.)
198 Affects subsequent searches for this solib. */
199 if (found_file
< 0 && IS_ABSOLUTE_PATH (in_pathname
))
201 /* First, get rid of any drive letters etc. */
202 while (!IS_DIR_SEPARATOR (*in_pathname
))
205 /* Next, get rid of all leading dir separators. */
206 while (IS_DIR_SEPARATOR (*in_pathname
))
210 /* If not found, search the solib_search_path (if any). */
211 if (found_file
< 0 && solib_search_path
!= NULL
)
212 found_file
= openp (solib_search_path
, OPF_TRY_CWD_FIRST
,
213 in_pathname
, O_RDONLY
| O_BINARY
, &temp_pathname
);
215 /* If not found, next search the solib_search_path (if any) for the basename
216 only (ignoring the path). This is to allow reading solibs from a path
217 that differs from the opened path. */
218 if (found_file
< 0 && solib_search_path
!= NULL
)
219 found_file
= openp (solib_search_path
, OPF_TRY_CWD_FIRST
,
220 lbasename (in_pathname
), O_RDONLY
| O_BINARY
,
223 /* If not found, try to use target supplied solib search method */
224 if (found_file
< 0 && ops
->find_and_open_solib
)
225 found_file
= ops
->find_and_open_solib (in_pathname
, O_RDONLY
| O_BINARY
,
228 /* If not found, next search the inferior's $PATH environment variable. */
229 if (found_file
< 0 && gdb_sysroot_is_empty
)
230 found_file
= openp (get_in_environ (inferior_environ
, "PATH"),
231 OPF_TRY_CWD_FIRST
, in_pathname
, O_RDONLY
| O_BINARY
,
234 /* If not found, next search the inferior's $LD_LIBRARY_PATH
235 environment variable. */
236 if (found_file
< 0 && gdb_sysroot_is_empty
)
237 found_file
= openp (get_in_environ (inferior_environ
, "LD_LIBRARY_PATH"),
238 OPF_TRY_CWD_FIRST
, in_pathname
, O_RDONLY
| O_BINARY
,
242 return temp_pathname
;
245 /* Open and return a BFD for the shared library PATHNAME. If FD is not -1,
246 it is used as file handle to open the file. Throws an error if the file
247 could not be opened. Handles both local and remote file access.
249 PATHNAME must be malloc'ed by the caller. If successful, the new BFD's
250 name will point to it. If unsuccessful, PATHNAME will be freed and the
251 FD will be closed (unless FD was -1). */
254 solib_bfd_fopen (char *pathname
, int fd
)
258 if (remote_filename_p (pathname
))
260 gdb_assert (fd
== -1);
261 abfd
= remote_bfd_open (pathname
, gnutarget
);
265 abfd
= bfd_fopen (pathname
, gnutarget
, FOPEN_RB
, fd
);
268 bfd_set_cacheable (abfd
, 1);
275 make_cleanup (xfree
, pathname
);
276 error (_("Could not open `%s' as an executable file: %s"),
277 pathname
, bfd_errmsg (bfd_get_error ()));
283 /* Find shared library PATHNAME and open a BFD for it. */
286 solib_bfd_open (char *pathname
)
288 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
289 char *found_pathname
;
293 /* Use target-specific override if present. */
295 return ops
->bfd_open (pathname
);
297 /* Search for shared library file. */
298 found_pathname
= solib_find (pathname
, &found_file
);
299 if (found_pathname
== NULL
)
300 perror_with_name (pathname
);
302 /* Open bfd for shared library. */
303 abfd
= solib_bfd_fopen (found_pathname
, found_file
);
305 /* Check bfd format. */
306 if (!bfd_check_format (abfd
, bfd_object
))
309 make_cleanup (xfree
, found_pathname
);
310 error (_("`%s': not in executable format: %s"),
311 found_pathname
, bfd_errmsg (bfd_get_error ()));
322 solib_map_sections -- open bfd and build sections for shared lib
326 static int solib_map_sections (struct so_list *so)
330 Given a pointer to one of the shared objects in our list
331 of mapped objects, use the recorded name to open a bfd
332 descriptor for the object, build a section table, and then
333 relocate all the section addresses by the base address at
334 which the shared object was mapped.
338 In most (all?) cases the shared object file name recorded in the
339 dynamic linkage tables will be a fully qualified pathname. For
340 cases where it isn't, do we really mimic the systems search
341 mechanism correctly in the below code (particularly the tilde
346 solib_map_sections (void *arg
)
348 struct so_list
*so
= (struct so_list
*) arg
; /* catch_errors bogon */
350 struct target_section
*p
;
351 struct cleanup
*old_chain
;
354 filename
= tilde_expand (so
->so_name
);
355 old_chain
= make_cleanup (xfree
, filename
);
356 abfd
= solib_bfd_open (filename
);
357 do_cleanups (old_chain
);
359 /* Leave bfd open, core_xfer_memory and "info files" need it. */
362 /* copy full path name into so_name, so that later symbol_file_add
364 if (strlen (bfd_get_filename (abfd
)) >= SO_NAME_MAX_PATH_SIZE
)
365 error (_("Shared library file name is too long."));
366 strcpy (so
->so_name
, bfd_get_filename (abfd
));
368 if (build_section_table (abfd
, &so
->sections
, &so
->sections_end
))
370 error (_("Can't find the file sections in `%s': %s"),
371 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
374 for (p
= so
->sections
; p
< so
->sections_end
; p
++)
376 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
378 /* Relocate the section binding addresses as recorded in the shared
379 object's file by the base address to which the object was actually
381 ops
->relocate_section_addresses (so
, p
);
383 /* If the target didn't provide information about the address
384 range of the shared object, assume we want the location of
385 the .text section. */
386 if (so
->addr_low
== 0 && so
->addr_high
== 0
387 && strcmp (p
->the_bfd_section
->name
, ".text") == 0)
389 so
->addr_low
= p
->addr
;
390 so
->addr_high
= p
->endaddr
;
399 free_so --- free a `struct so_list' object
403 void free_so (struct so_list *so)
407 Free the storage associated with the `struct so_list' object SO.
408 If we have opened a BFD for SO, close it.
410 The caller is responsible for removing SO from whatever list it is
411 a member of. If we have placed SO's sections in some target's
412 section table, the caller is responsible for removing them.
414 This function doesn't mess with objfiles at all. If there is an
415 objfile associated with SO that needs to be removed, the caller is
416 responsible for taking care of that. */
419 free_so (struct so_list
*so
)
421 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
422 char *bfd_filename
= 0;
425 xfree (so
->sections
);
429 bfd_filename
= bfd_get_filename (so
->abfd
);
430 if (! bfd_close (so
->abfd
))
431 warning (_("cannot close \"%s\": %s"),
432 bfd_filename
, bfd_errmsg (bfd_get_error ()));
436 xfree (bfd_filename
);
444 /* Return address of first so_list entry in master shared object list. */
446 master_so_list (void)
452 symbol_add_stub (struct so_list
*so
, int flags
)
454 struct section_addr_info
*sap
;
456 /* Have we already loaded this shared object? */
457 ALL_OBJFILES (so
->objfile
)
459 if (strcmp (so
->objfile
->name
, so
->so_name
) == 0)
463 sap
= build_section_addr_info_from_section_table (so
->sections
,
466 so
->objfile
= symbol_file_add_from_bfd (so
->abfd
, flags
,
467 sap
, OBJF_SHARED
| OBJF_KEEPBFD
);
468 free_section_addr_info (sap
);
473 /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS,
474 be chatty about it. Return non-zero if any symbols were actually
478 solib_read_symbols (struct so_list
*so
, int flags
)
480 const int from_tty
= flags
& SYMFILE_VERBOSE
;
482 if (so
->symbols_loaded
)
485 printf_unfiltered (_("Symbols already loaded for %s\n"), so
->so_name
);
487 else if (so
->abfd
== NULL
)
490 printf_unfiltered (_("Symbol file not found for %s\n"), so
->so_name
);
494 volatile struct gdb_exception exception
;
495 TRY_CATCH (exception
, RETURN_MASK_ALL
)
497 symbol_add_stub (so
, flags
);
499 if (exception
.reason
!= 0)
501 exception_fprintf (gdb_stderr
, exception
,
502 "Error while reading shared library symbols:\n");
505 if (from_tty
&& print_symbol_loading
)
506 printf_unfiltered (_("Loaded symbols for %s\n"), so
->so_name
);
507 so
->symbols_loaded
= 1;
516 update_solib_list --- synchronize GDB's shared object list with inferior's
520 void update_solib_list (int from_tty, struct target_ops *TARGET)
522 Extract the list of currently loaded shared objects from the
523 inferior, and compare it with the list of shared objects currently
524 in GDB's so_list_head list. Edit so_list_head to bring it in sync
525 with the inferior's new list.
527 If we notice that the inferior has unloaded some shared objects,
528 free any symbolic info GDB had read about those shared objects.
530 Don't load symbolic info for any new shared objects; just add them
531 to the list, and leave their symbols_loaded flag clear.
533 If FROM_TTY is non-null, feel free to print messages about what
536 If TARGET is non-null, add the sections of all new shared objects
537 to TARGET's section table. Note that this doesn't remove any
538 sections for shared objects that have been unloaded, and it
539 doesn't check to see if the new shared objects are already present in
540 the section table. But we only use this for core files and
541 processes we've just attached to, so that's okay. */
544 update_solib_list (int from_tty
, struct target_ops
*target
)
546 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
547 struct so_list
*inferior
= ops
->current_sos();
548 struct so_list
*gdb
, **gdb_link
;
550 /* We can reach here due to changing solib-search-path or the
551 sysroot, before having any inferior. */
552 if (target_has_execution
&& !ptid_equal (inferior_ptid
, null_ptid
))
554 struct inferior
*inf
= current_inferior ();
556 /* If we are attaching to a running process for which we
557 have not opened a symbol file, we may be able to get its
559 if (inf
->attach_flag
&& symfile_objfile
== NULL
)
560 catch_errors (ops
->open_symbol_file_object
, &from_tty
,
561 "Error reading attached process's symbol file.\n",
565 /* GDB and the inferior's dynamic linker each maintain their own
566 list of currently loaded shared objects; we want to bring the
567 former in sync with the latter. Scan both lists, seeing which
568 shared objects appear where. There are three cases:
570 - A shared object appears on both lists. This means that GDB
571 knows about it already, and it's still loaded in the inferior.
572 Nothing needs to happen.
574 - A shared object appears only on GDB's list. This means that
575 the inferior has unloaded it. We should remove the shared
576 object from GDB's tables.
578 - A shared object appears only on the inferior's list. This
579 means that it's just been loaded. We should add it to GDB's
582 So we walk GDB's list, checking each entry to see if it appears
583 in the inferior's list too. If it does, no action is needed, and
584 we remove it from the inferior's list. If it doesn't, the
585 inferior has unloaded it, and we remove it from GDB's list. By
586 the time we're done walking GDB's list, the inferior's list
587 contains only the new shared objects, which we then add. */
590 gdb_link
= &so_list_head
;
593 struct so_list
*i
= inferior
;
594 struct so_list
**i_link
= &inferior
;
596 /* Check to see whether the shared object *gdb also appears in
597 the inferior's current list. */
602 if (ops
->same (gdb
, i
))
607 if (! strcmp (gdb
->so_original_name
, i
->so_original_name
))
615 /* If the shared object appears on the inferior's list too, then
616 it's still loaded, so we don't need to do anything. Delete
617 it from the inferior's list, and leave it on GDB's list. */
622 gdb_link
= &gdb
->next
;
626 /* If it's not on the inferior's list, remove it from GDB's tables. */
629 /* Notify any observer that the shared object has been
630 unloaded before we remove it from GDB's tables. */
631 observer_notify_solib_unloaded (gdb
);
633 *gdb_link
= gdb
->next
;
635 /* Unless the user loaded it explicitly, free SO's objfile. */
636 if (gdb
->objfile
&& ! (gdb
->objfile
->flags
& OBJF_USERLOADED
))
637 free_objfile (gdb
->objfile
);
639 /* Some targets' section tables might be referring to
640 sections from so->abfd; remove them. */
641 remove_target_sections (gdb
->abfd
);
648 /* Now the inferior's list contains only shared objects that don't
649 appear in GDB's list --- those that are newly loaded. Add them
650 to GDB's shared object list. */
655 /* Add the new shared objects to GDB's list. */
656 *gdb_link
= inferior
;
658 /* Fill in the rest of each of the `struct so_list' nodes. */
659 for (i
= inferior
; i
; i
= i
->next
)
661 i
->from_tty
= from_tty
;
663 /* Fill in the rest of the `struct so_list' node. */
664 catch_errors (solib_map_sections
, i
,
665 "Error while mapping shared library sections:\n",
668 /* Add the shared object's sections to the current set of
669 file section tables. Do this immediately after mapping
670 the object so that later nodes in the list can query this
671 object, as is needed in solib-osf.c. */
672 add_target_sections (i
->sections
, i
->sections_end
);
674 /* Notify any observer that the shared object has been
675 loaded now that we've added it to GDB's tables. */
676 observer_notify_solib_loaded (i
);
682 /* Return non-zero if NAME is the libpthread shared library.
684 Uses a fairly simplistic heuristic approach where we check
685 the file name against "/libpthread". This can lead to false
686 positives, but this should be good enough in practice. */
689 libpthread_name_p (const char *name
)
691 return (strstr (name
, "/libpthread") != NULL
);
694 /* Return non-zero if SO is the libpthread shared library. */
697 libpthread_solib_p (struct so_list
*so
)
699 return libpthread_name_p (so
->so_name
);
704 solib_add -- read in symbol info for newly added shared libraries
708 void solib_add (char *pattern, int from_tty, struct target_ops
709 *TARGET, int readsyms)
713 Read in symbolic information for any shared objects whose names
714 match PATTERN. (If we've already read a shared object's symbol
715 info, leave it alone.) If PATTERN is zero, read them all.
717 If READSYMS is 0, defer reading symbolic information until later
718 but still do any needed low level processing.
720 FROM_TTY and TARGET are as described for update_solib_list, above. */
723 solib_add (char *pattern
, int from_tty
, struct target_ops
*target
, int readsyms
)
729 char *re_err
= re_comp (pattern
);
732 error (_("Invalid regexp: %s"), re_err
);
735 update_solib_list (from_tty
, target
);
737 /* Walk the list of currently loaded shared libraries, and read
738 symbols for any that match the pattern --- or any whose symbols
739 aren't already loaded, if no pattern was given. */
742 int loaded_any_symbols
= 0;
744 SYMFILE_DEFER_BP_RESET
| (from_tty
? SYMFILE_VERBOSE
: 0);
746 for (gdb
= so_list_head
; gdb
; gdb
= gdb
->next
)
747 if (! pattern
|| re_exec (gdb
->so_name
))
749 /* Normally, we would read the symbols from that library
750 only if READSYMS is set. However, we're making a small
751 exception for the pthread library, because we sometimes
752 need the library symbols to be loaded in order to provide
753 thread support (x86-linux for instance). */
754 const int add_this_solib
=
755 (readsyms
|| libpthread_solib_p (gdb
));
758 if (add_this_solib
&& solib_read_symbols (gdb
, flags
))
759 loaded_any_symbols
= 1;
762 if (loaded_any_symbols
)
763 breakpoint_re_set ();
765 if (from_tty
&& pattern
&& ! any_matches
)
767 ("No loaded shared libraries match the pattern `%s'.\n", pattern
);
769 if (loaded_any_symbols
)
771 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
773 /* Getting new symbols may change our opinion about what is
775 reinit_frame_cache ();
777 ops
->special_symbol_handling ();
787 info_sharedlibrary_command -- code for "info sharedlibrary"
791 static void info_sharedlibrary_command ()
795 Walk through the shared library list and print information
796 about each attached library.
800 info_sharedlibrary_command (char *ignore
, int from_tty
)
802 struct so_list
*so
= NULL
; /* link map state variable */
806 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
807 addr_width
= 4 + (gdbarch_ptr_bit (target_gdbarch
) / 4);
809 update_solib_list (from_tty
, 0);
811 for (so
= so_list_head
; so
; so
= so
->next
)
817 printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width
, "From",
818 addr_width
, "To", "Syms Read",
819 "Shared Object Library");
823 printf_unfiltered ("%-*s", addr_width
,
825 ? hex_string_custom (
826 (LONGEST
) so
->addr_low
,
829 printf_unfiltered ("%-*s", addr_width
,
831 ? hex_string_custom (
832 (LONGEST
) so
->addr_high
,
835 printf_unfiltered ("%-12s", so
->symbols_loaded
? "Yes" : "No");
836 printf_unfiltered ("%s\n", so
->so_name
);
839 if (so_list_head
== NULL
)
841 printf_unfiltered (_("No shared libraries loaded at this time.\n"));
845 /* Return 1 if ADDRESS lies within SOLIB. */
848 solib_contains_address_p (const struct so_list
*const solib
,
851 struct target_section
*p
;
853 for (p
= solib
->sections
; p
< solib
->sections_end
; p
++)
854 if (p
->addr
<= address
&& address
< p
->endaddr
)
864 solib_name_from_address -- if an address is in a shared lib, return
869 char * solib_name_from_address (CORE_ADDR address)
873 Provides a hook for other gdb routines to discover whether or
874 not a particular address is within the mapped address space of
877 For example, this routine is called at one point to disable
878 breakpoints which are in shared libraries that are not currently
883 solib_name_from_address (CORE_ADDR address
)
885 struct so_list
*so
= 0; /* link map state variable */
887 for (so
= so_list_head
; so
; so
= so
->next
)
888 if (solib_contains_address_p (so
, address
))
889 return (so
->so_name
);
894 /* Called by free_all_symtabs */
899 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
901 /* This function is expected to handle ELF shared libraries. It is
902 also used on Solaris, which can run either ELF or a.out binaries
903 (for compatibility with SunOS 4), both of which can use shared
904 libraries. So we don't know whether we have an ELF executable or
905 an a.out executable until the user chooses an executable file.
907 ELF shared libraries don't get mapped into the address space
908 until after the program starts, so we'd better not try to insert
909 breakpoints in them immediately. We have to wait until the
910 dynamic linker has loaded them; we'll hit a bp_shlib_event
911 breakpoint (look for calls to create_solib_event_breakpoint) when
914 SunOS shared libraries seem to be different --- they're present
915 as soon as the process begins execution, so there's no need to
916 put off inserting breakpoints. There's also nowhere to put a
917 bp_shlib_event breakpoint, so if we put it off, we'll never get
920 So: disable breakpoints only if we're using ELF shared libs. */
922 && bfd_get_flavour (exec_bfd
) != bfd_target_aout_flavour
)
923 disable_breakpoints_in_shlibs ();
927 struct so_list
*so
= so_list_head
;
928 so_list_head
= so
->next
;
929 observer_notify_solib_unloaded (so
);
931 remove_target_sections (so
->abfd
);
940 solib_create_inferior_hook -- shared library startup support
944 void solib_create_inferior_hook ()
948 When gdb starts up the inferior, it nurses it along (through the
949 shell) until it is ready to execute it's first instruction. At this
950 point, this function gets called via expansion of the macro
951 SOLIB_CREATE_INFERIOR_HOOK. */
954 solib_create_inferior_hook (void)
956 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
957 ops
->solib_create_inferior_hook();
962 in_solib_dynsym_resolve_code -- check to see if an address is in
963 dynamic loader's dynamic symbol
968 int in_solib_dynsym_resolve_code (CORE_ADDR pc)
972 Determine if PC is in the dynamic linker's symbol resolution
973 code. Return 1 if so, 0 otherwise.
977 in_solib_dynsym_resolve_code (CORE_ADDR pc
)
979 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
980 return ops
->in_dynsym_resolve_code (pc
);
987 sharedlibrary_command -- handle command to explicitly add library
991 static void sharedlibrary_command (char *args, int from_tty)
998 sharedlibrary_command (char *args
, int from_tty
)
1001 solib_add (args
, from_tty
, (struct target_ops
*) 0, 1);
1006 no_shared_libraries -- handle command to explicitly discard symbols
1007 from shared libraries.
1011 Implements the command "nosharedlibrary", which discards symbols
1012 that have been auto-loaded from shared libraries. Symbols from
1013 shared libraries that were added by explicit request of the user
1014 are not discarded. Also called from remote.c. */
1017 no_shared_libraries (char *ignored
, int from_tty
)
1019 /* The order of the two routines below is important: clear_solib notifies
1020 the solib_unloaded observers, and some of these observers might need
1021 access to their associated objfiles. Therefore, we can not purge the
1022 solibs' objfiles before clear_solib has been called. */
1025 objfile_purge_solibs ();
1029 reload_shared_libraries (char *ignored
, int from_tty
,
1030 struct cmd_list_element
*e
)
1032 no_shared_libraries (NULL
, from_tty
);
1033 solib_add (NULL
, from_tty
, NULL
, auto_solib_add
);
1034 /* Creating inferior hooks here has two purposes. First, if we reload
1035 shared libraries then the address of solib breakpoint we've computed
1036 previously might be no longer valid. For example, if we forgot to set
1037 solib-absolute-prefix and are setting it right now, then the previous
1038 breakpoint address is plain wrong. Second, installing solib hooks
1039 also implicitly figures were ld.so is and loads symbols for it.
1040 Absent this call, if we've just connected to a target and set
1041 solib-absolute-prefix or solib-search-path, we'll lose all information
1043 if (target_has_execution
)
1045 #ifdef SOLIB_CREATE_INFERIOR_HOOK
1046 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
1048 solib_create_inferior_hook ();
1051 /* We have unloaded and then reloaded debug info for all shared libraries.
1052 However, frames may still reference them, for example a frame's
1053 unwinder might still point of DWARF FDE structures that are now freed.
1054 Reinit frame cache to avoid crashing. */
1055 reinit_frame_cache ();
1059 show_auto_solib_add (struct ui_file
*file
, int from_tty
,
1060 struct cmd_list_element
*c
, const char *value
)
1062 fprintf_filtered (file
, _("Autoloading of shared library symbols is %s.\n"),
1067 /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call
1068 the library-specific handler if it is installed for the current target. */
1071 solib_global_lookup (const struct objfile
*objfile
,
1073 const char *linkage_name
,
1074 const domain_enum domain
)
1076 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
1078 if (ops
->lookup_lib_global_symbol
!= NULL
)
1079 return ops
->lookup_lib_global_symbol (objfile
, name
, linkage_name
, domain
);
1084 extern initialize_file_ftype _initialize_solib
; /* -Wmissing-prototypes */
1087 _initialize_solib (void)
1089 struct cmd_list_element
*c
;
1091 solib_data
= gdbarch_data_register_pre_init (solib_init
);
1093 add_com ("sharedlibrary", class_files
, sharedlibrary_command
,
1094 _("Load shared object library symbols for files matching REGEXP."));
1095 add_info ("sharedlibrary", info_sharedlibrary_command
,
1096 _("Status of loaded shared object libraries."));
1097 add_com ("nosharedlibrary", class_files
, no_shared_libraries
,
1098 _("Unload all shared object library symbols."));
1100 add_setshow_boolean_cmd ("auto-solib-add", class_support
,
1101 &auto_solib_add
, _("\
1102 Set autoloading of shared library symbols."), _("\
1103 Show autoloading of shared library symbols."), _("\
1104 If \"on\", symbols from all shared object libraries will be loaded\n\
1105 automatically when the inferior begins execution, when the dynamic linker\n\
1106 informs gdb that a new library has been loaded, or when attaching to the\n\
1107 inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."),
1109 show_auto_solib_add
,
1110 &setlist
, &showlist
);
1112 add_setshow_filename_cmd ("sysroot", class_support
,
1114 Set an alternate system root."), _("\
1115 Show the current system root."), _("\
1116 The system root is used to load absolute shared library symbol files.\n\
1117 For other (relative) files, you can add directories using\n\
1118 `set solib-search-path'."),
1119 reload_shared_libraries
,
1121 &setlist
, &showlist
);
1123 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1125 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1128 add_setshow_optional_filename_cmd ("solib-search-path", class_support
,
1129 &solib_search_path
, _("\
1130 Set the search path for loading non-absolute shared library symbol files."), _("\
1131 Show the search path for loading non-absolute shared library symbol files."), _("\
1132 This takes precedence over the environment variables PATH and LD_LIBRARY_PATH."),
1133 reload_shared_libraries
,
1134 show_solib_search_path
,
1135 &setlist
, &showlist
);