-/* Copyright (C) 1990 Free Software Foundation, Inc.
+/* Handle shared libraries for GDB, the GNU Debugger.
+ Copyright 1990, 91, 92, 93, 94, 95, 96, 98, 1999, 2000
+ Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
-/*
-** symbol definitions
-*/
#include <sys/types.h>
-#include <string.h>
-#include <link.h>
-#include <sys/param.h>
#include <fcntl.h>
-#include <stdio.h>
-#include "defs.h"
-#include "param.h"
+#include "gdb_string.h"
#include "symtab.h"
+#include "bfd.h"
+#include "symfile.h"
+#include "objfiles.h"
#include "gdbcore.h"
#include "command.h"
#include "target.h"
#include "frame.h"
-#include "regex.h"
+#include "gdb_regex.h"
#include "inferior.h"
+#include "environ.h"
+#include "language.h"
+#include "gdbcmd.h"
+
+#include "solist.h"
+
+/* external data declarations */
+
+/* FIXME: gdbarch needs to control this variable */
+struct target_so_ops *current_target_so_ops;
-extern char *getenv();
+/* local data declarations */
+
+static struct so_list *so_list_head; /* List of known shared objects */
+
+static int solib_cleanup_queued = 0; /* make_run_cleanup called */
+
+/* Local function prototypes */
+
+static void do_clear_solib (PTR);
+
+/* If non-zero, this is a prefix that will be added to the front of the name
+ shared libraries with an absolute filename for loading. */
+static char *solib_absolute_prefix = NULL;
+
+/* If non-empty, this is a search path for loading non-absolute shared library
+ symbol files. This takes precedence over the environment variables PATH
+ and LD_LIBRARY_PATH. */
+static char *solib_search_path = NULL;
/*
-** local data declarations
-*/
-#define MAX_PATH_SIZE 256
-struct so_list {
- struct link_map inferior_lm; /* inferior link map */
- struct link_map *inferior_lm_add;
- long ld_text;
- char inferior_so_name[MAX_PATH_SIZE]; /* Shared Object Library Name */
- struct so_list *next; /* Next Structure */
- char symbols_loaded; /* Flag: loaded? */
- char from_tty; /* Flag: print msgs? */
- bfd *so_bfd;
- struct section_table *sections;
- struct section_table *sections_end;
-};
-
-static struct so_list *so_list_head = 0;
+
+ GLOBAL FUNCTION
+
+ solib_open -- Find a shared library file and open it.
+
+ SYNOPSIS
+
+ int solib_open (char *in_patname, char **found_pathname);
+
+ DESCRIPTION
+
+ Global variable SOLIB_ABSOLUTE_PREFIX is used as a prefix directory
+ to search for shared libraries if they have an absolute path.
+
+ Global variable SOLIB_SEARCH_PATH is used as a prefix directory
+ (or set of directories, as in LD_LIBRARY_PATH) to search for all
+ shared libraries if not found in SOLIB_ABSOLUTE_PREFIX.
+
+ Search order:
+ * If path is absolute, look in SOLIB_ABSOLUTE_PREFIX.
+ * If path is absolute or relative, look for it literally (unmodified).
+ * Look in SOLIB_SEARCH_PATH.
+ * Look in inferior's $PATH.
+ * Look in inferior's $LD_LIBRARY_PATH.
+
+ RETURNS
+
+ file handle for opened solib, or -1 for failure. */
+
+int
+solib_open (char *in_pathname, char **found_pathname)
+{
+ int found_file = -1;
+ char *temp_pathname = NULL;
+
+ if (strchr (in_pathname, SLASH_CHAR))
+ {
+ if (! ROOTED_P (in_pathname) || solib_absolute_prefix == NULL)
+ temp_pathname = in_pathname;
+ else
+ {
+ int prefix_len = strlen (solib_absolute_prefix);
+
+ /* Remove trailing slashes from absolute prefix. */
+ while (prefix_len > 0
+ && SLASH_P (solib_absolute_prefix[prefix_len - 1]))
+ prefix_len--;
+
+ /* Cat the prefixed pathname together. */
+ temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1);
+ strncpy (temp_pathname, solib_absolute_prefix, prefix_len);
+ temp_pathname[prefix_len] = '\0';
+ strcat (temp_pathname, in_pathname);
+ }
+
+ /* Now see if we can open it. */
+ found_file = open (temp_pathname, O_RDONLY, 0);
+ }
+
+ /* If not found, next search the solib_search_path (if any). */
+ if (found_file < 0 && solib_search_path != NULL)
+ found_file = openp (solib_search_path,
+ 1, in_pathname, O_RDONLY, 0, &temp_pathname);
+
+ /* If not found, next search the inferior's $PATH environment variable. */
+ if (found_file < 0 && solib_search_path != NULL)
+ found_file = openp (get_in_environ (inferior_environ, "PATH"),
+ 1, in_pathname, O_RDONLY, 0, &temp_pathname);
+
+ /* If not found, next search the inferior's $LD_LIBRARY_PATH
+ environment variable. */
+ if (found_file < 0 && solib_search_path != NULL)
+ found_file = openp (get_in_environ (inferior_environ, "LD_LIBRARY_PATH"),
+ 1, in_pathname, O_RDONLY, 0, &temp_pathname);
+
+ /* Done. If not found, tough luck. Return found_file and
+ (optionally) found_pathname. */
+ if (found_pathname != NULL && temp_pathname != NULL)
+ *found_pathname = strsave (temp_pathname);
+ return found_file;
+}
+
/*
-** Build a section map for a shared library, record its text size in
-** the so_list structure and set up the text section of the shared lib.
-*/
-static void
-solib_map_sections(so)
-struct so_list *so;
+
+ LOCAL FUNCTION
+
+ solib_map_sections -- open bfd and build sections for shared lib
+
+ SYNOPSIS
+
+ static int solib_map_sections (struct so_list *so)
+
+ DESCRIPTION
+
+ Given a pointer to one of the shared objects in our list
+ of mapped objects, use the recorded name to open a bfd
+ descriptor for the object, build a section table, and then
+ relocate all the section addresses by the base address at
+ which the shared object was mapped.
+
+ FIXMES
+
+ In most (all?) cases the shared object file name recorded in the
+ dynamic linkage tables will be a fully qualified pathname. For
+ cases where it isn't, do we really mimic the systems search
+ mechanism correctly in the below code (particularly the tilde
+ expansion stuff?).
+ */
+
+static int
+solib_map_sections (PTR arg)
{
+ struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */
char *filename;
char *scratch_pathname;
int scratch_chan;
struct section_table *p;
-
- filename = tilde_expand (so->inferior_so_name);
- make_cleanup (free, filename);
-
- scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
- &scratch_pathname);
- if (scratch_chan < 0)
- scratch_chan = openp (getenv ("LD_LIBRARY_PATH"), 1, filename, O_RDONLY, 0,
- &scratch_pathname);
+ struct cleanup *old_chain;
+ bfd *abfd;
+
+ filename = tilde_expand (so->so_name);
+
+ old_chain = make_cleanup (xfree, filename);
+ scratch_chan = solib_open (filename, &scratch_pathname);
+
if (scratch_chan < 0)
- perror_with_name (filename);
-
- so->so_bfd = bfd_fdopenr (scratch_pathname, NULL, scratch_chan);
- if (!so->so_bfd)
- error ("Could not open `%s' as an executable file: %s",
- scratch_pathname, bfd_errmsg (bfd_error));
- if (!bfd_check_format (so->so_bfd, bfd_object))
- error ("\"%s\": not in executable format: %s.",
- scratch_pathname, bfd_errmsg (bfd_error));
- if (build_section_table (so->so_bfd, &so->sections, &so->sections_end))
- error ("Can't find the file sections in `%s': %s",
- exec_bfd->filename, bfd_errmsg (bfd_error));
+ {
+ perror_with_name (filename);
+ }
+
+ /* Leave scratch_pathname allocated. abfd->name will point to it. */
+ abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan);
+ if (!abfd)
+ {
+ close (scratch_chan);
+ error ("Could not open `%s' as an executable file: %s",
+ scratch_pathname, bfd_errmsg (bfd_get_error ()));
+ }
+
+ /* Leave bfd open, core_xfer_memory and "info files" need it. */
+ so->abfd = abfd;
+ abfd->cacheable = true;
+
+ /* copy full path name into so_name, so that later symbol_file_add
+ can find it */
+ if (strlen (scratch_pathname) >= SO_NAME_MAX_PATH_SIZE)
+ error ("Full path name length of shared library exceeds SO_NAME_MAX_PATH_SIZE in so_list structure.");
+ strcpy (so->so_name, scratch_pathname);
+
+ if (!bfd_check_format (abfd, bfd_object))
+ {
+ error ("\"%s\": not in executable format: %s.",
+ scratch_pathname, bfd_errmsg (bfd_get_error ()));
+ }
+ if (build_section_table (abfd, &so->sections, &so->sections_end))
+ {
+ error ("Can't find the file sections in `%s': %s",
+ bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
+ }
for (p = so->sections; p < so->sections_end; p++)
{
- if (strcmp (bfd_section_name (so->so_bfd, p->sec_ptr), ".text") == 0)
+ /* Relocate the section binding addresses as recorded in the shared
+ object's file by the base address to which the object was actually
+ mapped. */
+ TARGET_SO_RELOCATE_SECTION_ADDRESSES (so, p);
+ if (STREQ (p->the_bfd_section->name, ".text"))
{
- /* Determine length of text section and relocate it. */
- so->ld_text = p->endaddr - p->addr;
- p->addr += (CORE_ADDR)so->inferior_lm.lm_addr;
- p->endaddr += (CORE_ADDR)so->inferior_lm.lm_addr;
+ so->textsection = p;
}
- else
- /* All other sections are ignored for now. */
- p->addr = p->endaddr = 0;
}
+
+ /* Free the file names, close the file now. */
+ do_cleanups (old_chain);
+
+ return (1);
}
-/*=======================================================================*/
-
-/* find_solib
-**
-**Description:
-**
-** This module contains the routine which finds the names of any loaded
-** "images" in the current process. The argument in must be NULL on the
-** first call, and then the returned value must be passed in on
-** subsequent calls. This provides the capability to "step" down the
-** list of loaded objects. On the last object, a NULL value is returned.
-** The arg and return value are "struct link_map" pointers, as defined
-** in <link.h>.
-**
-** NOTE: This only works under SunOS4.0.
-*/
-
-struct so_list *find_solib(so_list_ptr)
-struct so_list *so_list_ptr; /* so_list_head position ptr */
+/* LOCAL FUNCTION
+
+ free_so --- free a `struct so_list' object
+
+ SYNOPSIS
+
+ void free_so (struct so_list *so)
+
+ DESCRIPTION
+
+ Free the storage associated with the `struct so_list' object SO.
+ If we have opened a BFD for SO, close it.
+
+ The caller is responsible for removing SO from whatever list it is
+ a member of. If we have placed SO's sections in some target's
+ section table, the caller is responsible for removing them.
+
+ This function doesn't mess with objfiles at all. If there is an
+ objfile associated with SO that needs to be removed, the caller is
+ responsible for taking care of that. */
+
+void
+free_so (struct so_list *so)
{
-struct so_list *so_list_next = 0;
-struct link_map *inferior_lm = 0;
-struct link_dynamic inferior_dynamic_cpy;
-struct link_dynamic_2 inferior_ld_2_cpy;
-struct so_list *new;
-int i;
-
- if (!so_list_ptr) {
- if (!(so_list_next = so_list_head)) {
- i = lookup_misc_func ("_DYNAMIC");
- if (i >= 0) {
- read_memory(misc_function_vector[i].address,
- &inferior_dynamic_cpy,
- sizeof(struct link_dynamic));
- if (inferior_dynamic_cpy.ld_version == 3) {
- read_memory((CORE_ADDR)inferior_dynamic_cpy.ld_un.ld_2,
- &inferior_ld_2_cpy,
- sizeof(struct link_dynamic_2));
- inferior_lm = inferior_ld_2_cpy.ld_loaded;
- }
- }
- }
- } else {
- /*
- ** Advance to next local abbreviated load_map structure
- */
- if (!(inferior_lm = so_list_ptr->inferior_lm.lm_next)) {
- /* See if any were added, but be quiet if we can't read
- from the target any more. */
- int status;
-
- status = target_read_memory (
- (CORE_ADDR)so_list_ptr->inferior_lm_add,
- (char *)&so_list_ptr->inferior_lm,
- sizeof(struct link_map));
- if (status == 0)
- inferior_lm = so_list_ptr->inferior_lm.lm_next;
- else
- inferior_lm = 0;
- }
- so_list_next = so_list_ptr->next;
- }
- if ((!so_list_next) && inferior_lm) {
- /*
- ** Get Next LM Structure from inferior image and build
- ** an local abbreviated load_map structure
- */
- new = (struct so_list *) xmalloc(sizeof(struct so_list));
- new->inferior_lm_add = inferior_lm;
- read_memory((CORE_ADDR)inferior_lm,
- &new->inferior_lm,
- sizeof(struct link_map));
-
- read_memory((CORE_ADDR)new->inferior_lm.lm_name,
- new->inferior_so_name,
- MAX_PATH_SIZE - 1);
- new->inferior_so_name[MAX_PATH_SIZE - 1] = 0;
- /* Zero everything after the first terminating null */
- strncpy(new->inferior_so_name, new->inferior_so_name, MAX_PATH_SIZE);
-
-#if 0
- /* This doesn't work for core files, so instead get ld_text
- using solib_map_sections (below). */
- read_memory((CORE_ADDR)new->inferior_lm.lm_ld,
- &inferior_dynamic_cpy,
- sizeof(struct link_dynamic));
- read_memory((CORE_ADDR)inferior_dynamic_cpy.ld_un.ld_2,
- &inferior_ld_2_cpy,
- sizeof(struct link_dynamic_2));
- new->ld_text = inferior_ld_2_cpy.ld_text;
-#endif
-
- new->next = 0;
- new->symbols_loaded = 0;
- new->so_bfd = NULL;
- new->sections = NULL;
- if (so_list_ptr)
- so_list_ptr->next = new;
- else
- so_list_head = new;
-
- solib_map_sections (new);
-
- so_list_next = new;
- }
- return(so_list_next);
+ char *bfd_filename = 0;
+
+ if (so->sections)
+ xfree (so->sections);
+
+ if (so->abfd)
+ {
+ bfd_filename = bfd_get_filename (so->abfd);
+ if (! bfd_close (so->abfd))
+ warning ("cannot close \"%s\": %s",
+ bfd_filename, bfd_errmsg (bfd_get_error ()));
+ }
+
+ if (bfd_filename)
+ xfree (bfd_filename);
+
+ TARGET_SO_FREE_SO (so);
+
+ xfree (so);
}
+
/* A small stub to get us past the arg-passing pinhole of catch_errors. */
static int
-symbol_add_stub (arg)
- char *arg;
+symbol_add_stub (PTR arg)
{
- register struct so_list *so = (struct so_list *)arg; /* catch_errs bogon */
+ register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */
+ struct section_addr_info *sap;
+
+ /* Have we already loaded this shared object? */
+ ALL_OBJFILES (so->objfile)
+ {
+ if (strcmp (so->objfile->name, so->so_name) == 0)
+ return 1;
+ }
+
+ sap = build_section_addr_info_from_section_table (so->sections,
+ so->sections_end);
- symbol_file_add (so->inferior_so_name, so->from_tty,
- (unsigned int)so->inferior_lm.lm_addr, 0);
- return 1;
+ so->objfile = symbol_file_add (so->so_name, so->from_tty,
+ sap, 0, OBJF_SHARED);
+ free_section_addr_info (sap);
+
+ return (1);
}
-/* The real work of adding a shared library file to the symtab and
- the section list. */
+
+/* LOCAL FUNCTION
+
+ update_solib_list --- synchronize GDB's shared object list with inferior's
+
+ SYNOPSIS
+
+ void update_solib_list (int from_tty, struct target_ops *TARGET)
+
+ Extract the list of currently loaded shared objects from the
+ inferior, and compare it with the list of shared objects currently
+ in GDB's so_list_head list. Edit so_list_head to bring it in sync
+ with the inferior's new list.
+
+ If we notice that the inferior has unloaded some shared objects,
+ free any symbolic info GDB had read about those shared objects.
+
+ Don't load symbolic info for any new shared objects; just add them
+ to the list, and leave their symbols_loaded flag clear.
+
+ If FROM_TTY is non-null, feel free to print messages about what
+ we're doing.
+
+ If TARGET is non-null, add the sections of all new shared objects
+ to TARGET's section table. Note that this doesn't remove any
+ sections for shared objects that have been unloaded, and it
+ doesn't check to see if the new shared objects are already present in
+ the section table. But we only use this for core files and
+ processes we've just attached to, so that's okay. */
void
-solib_add (arg_string, from_tty, target)
- char *arg_string;
- int from_tty;
- struct target_ops *target;
-{
- register struct so_list *so = 0; /* link map state variable */
- char *val;
- int count, old;
- struct section_table *sec;
-
- if (arg_string == 0)
- re_comp (".");
- else if (val = (char *) re_comp (arg_string)) {
- error ("Invalid regexp: %s", val);
- }
+update_solib_list (int from_tty, struct target_ops *target)
+{
+ struct so_list *inferior = TARGET_SO_CURRENT_SOS ();
+ struct so_list *gdb, **gdb_link;
+
+ /* If we are attaching to a running process for which we
+ have not opened a symbol file, we may be able to get its
+ symbols now! */
+ if (attach_flag &&
+ symfile_objfile == NULL)
+ catch_errors (TARGET_SO_OPEN_SYMBOL_FILE_OBJECT, (PTR) &from_tty,
+ "Error reading attached process's symbol file.\n",
+ RETURN_MASK_ALL);
+
+ /* Since this function might actually add some elements to the
+ so_list_head list, arrange for it to be cleaned up when
+ appropriate. */
+ if (!solib_cleanup_queued)
+ {
+ make_run_cleanup (do_clear_solib, NULL);
+ solib_cleanup_queued = 1;
+ }
- /* Getting new symbols may change our opinion about what is
- frameless. */
- reinit_frame_cache ();
+ /* GDB and the inferior's dynamic linker each maintain their own
+ list of currently loaded shared objects; we want to bring the
+ former in sync with the latter. Scan both lists, seeing which
+ shared objects appear where. There are three cases:
+
+ - A shared object appears on both lists. This means that GDB
+ knows about it already, and it's still loaded in the inferior.
+ Nothing needs to happen.
+
+ - A shared object appears only on GDB's list. This means that
+ the inferior has unloaded it. We should remove the shared
+ object from GDB's tables.
+
+ - A shared object appears only on the inferior's list. This
+ means that it's just been loaded. We should add it to GDB's
+ tables.
+
+ So we walk GDB's list, checking each entry to see if it appears
+ in the inferior's list too. If it does, no action is needed, and
+ we remove it from the inferior's list. If it doesn't, the
+ inferior has unloaded it, and we remove it from GDB's list. By
+ the time we're done walking GDB's list, the inferior's list
+ contains only the new shared objects, which we then add. */
+
+ gdb = so_list_head;
+ gdb_link = &so_list_head;
+ while (gdb)
+ {
+ struct so_list *i = inferior;
+ struct so_list **i_link = &inferior;
- if (from_tty) {
- printf_filtered ("Shared libraries");
- if (arg_string)
- printf_filtered (" matching regular expresion \"%s\"", arg_string);
- printf_filtered (":\n");
- }
-
- dont_repeat();
+ /* Check to see whether the shared object *gdb also appears in
+ the inferior's current list. */
+ while (i)
+ {
+ if (! strcmp (gdb->so_original_name, i->so_original_name))
+ break;
- while (so = find_solib(so)) {
- if (re_exec(so->inferior_so_name)) {
- if (so->symbols_loaded) {
- if (from_tty)
- printf("Symbols already loaded for %s\n", so->inferior_so_name);
- } else {
- so->symbols_loaded = 1;
- so->from_tty = from_tty;
- catch_errors (symbol_add_stub, (char *)so,
- "Error while reading shared library symbols; continuing.");
- }
- }
- }
+ i_link = &i->next;
+ i = *i_link;
+ }
+
+ /* If the shared object appears on the inferior's list too, then
+ it's still loaded, so we don't need to do anything. Delete
+ it from the inferior's list, and leave it on GDB's list. */
+ if (i)
+ {
+ *i_link = i->next;
+ free_so (i);
+ gdb_link = &gdb->next;
+ gdb = *gdb_link;
+ }
+
+ /* If it's not on the inferior's list, remove it from GDB's tables. */
+ else
+ {
+ *gdb_link = gdb->next;
+
+ /* Unless the user loaded it explicitly, free SO's objfile. */
+ if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED))
+ free_objfile (gdb->objfile);
- /* Now add the shared library sections to the section table of the
- specified target, if any. */
- if (target) {
- /* Count how many new section_table entries there are. */
- so = 0;
- count = 0;
- while (0 != (so = find_solib (so))) {
- count += so->sections_end - so->sections;
+ /* Some targets' section tables might be referring to
+ sections from so->abfd; remove them. */
+ remove_target_sections (gdb->abfd);
+
+ free_so (gdb);
+ gdb = *gdb_link;
+ }
}
- if (count) {
- /* Reallocate the target's section table including the new size. */
- if (target->sections) {
- old = target->sections_end - target->sections;
- target->sections = (struct section_table *)
- realloc ((char *)target->sections,
- (sizeof (struct section_table)) * (count + old));
- } else {
- old = 0;
- target->sections = (struct section_table *)
- malloc ((sizeof (struct section_table)) * count);
- }
- target->sections_end = target->sections + (count + old);
-
- /* Add these section table entries to the target's table. */
- while (0 != (so = find_solib (so))) {
- count = so->sections_end - so->sections;
- bcopy (so->sections, (char *)(target->sections + old),
- (sizeof (struct section_table)) * count);
- old += count;
- }
+ /* Now the inferior's list contains only shared objects that don't
+ appear in GDB's list --- those that are newly loaded. Add them
+ to GDB's shared object list. */
+ if (inferior)
+ {
+ struct so_list *i;
+
+ /* Add the new shared objects to GDB's list. */
+ *gdb_link = inferior;
+
+ /* Fill in the rest of each of the `struct so_list' nodes. */
+ for (i = inferior; i; i = i->next)
+ {
+ i->from_tty = from_tty;
+
+ /* Fill in the rest of the `struct so_list' node. */
+ catch_errors (solib_map_sections, i,
+ "Error while mapping shared library sections:\n",
+ RETURN_MASK_ALL);
+ }
+
+ /* If requested, add the shared objects' sections to the the
+ TARGET's section table. */
+ if (target)
+ {
+ int new_sections;
+
+ /* Figure out how many sections we'll need to add in total. */
+ new_sections = 0;
+ for (i = inferior; i; i = i->next)
+ new_sections += (i->sections_end - i->sections);
+
+ if (new_sections > 0)
+ {
+ int space = target_resize_to_sections (target, new_sections);
+
+ for (i = inferior; i; i = i->next)
+ {
+ int count = (i->sections_end - i->sections);
+ memcpy (target->to_sections + space,
+ i->sections,
+ count * sizeof (i->sections[0]));
+ space += count;
+ }
+ }
+ }
}
- }
}
-/*=======================================================================*/
-static void solib_info()
+/* GLOBAL FUNCTION
+
+ solib_add -- read in symbol info for newly added shared libraries
+
+ SYNOPSIS
+
+ void solib_add (char *pattern, int from_tty, struct target_ops *TARGET)
+
+ DESCRIPTION
+
+ Read in symbolic information for any shared objects whose names
+ match PATTERN. (If we've already read a shared object's symbol
+ info, leave it alone.) If PATTERN is zero, read them all.
+
+ FROM_TTY and TARGET are as described for update_solib_list, above. */
+
+void
+solib_add (char *pattern, int from_tty, struct target_ops *target)
{
-register struct so_list *so = 0; /* link map state variable */
+ struct so_list *gdb;
- while (so = find_solib(so)) {
- if (so == so_list_head) {
- printf(" Address Range Syms Read Shared Object Library\n");
- }
- printf(" 0x%08x - 0x%08x %s %s\n",
- so->inferior_lm.lm_addr,
- so->inferior_lm.lm_addr + so->ld_text - 1,
- (so->symbols_loaded ? "Yes" : "No "),
- so->inferior_so_name);
- }
- if (!so_list_head) {
- printf("No shared libraries loaded at this time.\n");
+ if (pattern)
+ {
+ char *re_err = re_comp (pattern);
+
+ if (re_err)
+ error ("Invalid regexp: %s", re_err);
}
+
+ update_solib_list (from_tty, target);
+
+ /* Walk the list of currently loaded shared libraries, and read
+ symbols for any that match the pattern --- or any whose symbols
+ aren't already loaded, if no pattern was given. */
+ {
+ int any_matches = 0;
+ int loaded_any_symbols = 0;
+
+ for (gdb = so_list_head; gdb; gdb = gdb->next)
+ if (! pattern || re_exec (gdb->so_name))
+ {
+ any_matches = 1;
+
+ if (gdb->symbols_loaded)
+ {
+ if (from_tty)
+ printf_unfiltered ("Symbols already loaded for %s\n",
+ gdb->so_name);
+ }
+ else
+ {
+ if (catch_errors
+ (symbol_add_stub, gdb,
+ "Error while reading shared library symbols:\n",
+ RETURN_MASK_ALL))
+ {
+ if (from_tty)
+ printf_unfiltered ("Loaded symbols for %s\n",
+ gdb->so_name);
+ gdb->symbols_loaded = 1;
+ loaded_any_symbols = 1;
+ }
+ }
+ }
+
+ if (from_tty && pattern && ! any_matches)
+ printf_unfiltered
+ ("No loaded shared libraries match the pattern `%s'.\n", pattern);
+
+ if (loaded_any_symbols)
+ {
+ /* Getting new symbols may change our opinion about what is
+ frameless. */
+ reinit_frame_cache ();
+
+ TARGET_SO_SPECIAL_SYMBOL_HANDLING ();
+ }
+ }
}
+
/*
-** Called by Insert Breakpoint to see if Address is Shared Library Address
-*/
-int
-solib_address(address)
- CORE_ADDR address;
+
+ LOCAL FUNCTION
+
+ info_sharedlibrary_command -- code for "info sharedlibrary"
+
+ SYNOPSIS
+
+ static void info_sharedlibrary_command ()
+
+ DESCRIPTION
+
+ Walk through the shared library list and print information
+ about each attached library.
+ */
+
+static void
+info_sharedlibrary_command (char *ignore, int from_tty)
{
-register struct so_list *so = 0; /* link map state variable */
+ register struct so_list *so = NULL; /* link map state variable */
+ int header_done = 0;
+ int addr_width;
+ char *addr_fmt;
+ int arch_size;
+
+ if (exec_bfd == NULL)
+ {
+ printf_unfiltered ("No executable file.\n");
+ return;
+ }
+
+ arch_size = bfd_get_arch_size (exec_bfd);
+ /* Default to 32-bit in case of failure (non-elf). */
+ if (arch_size == 32 || arch_size == -1)
+ {
+ addr_width = 8 + 4;
+ addr_fmt = "08l";
+ }
+ else if (arch_size == 64)
+ {
+ addr_width = 16 + 4;
+ addr_fmt = "016l";
+ }
+ else
+ {
+ internal_error ("%s:%d: bfd_get_arch_size() returned unknown size %d",
+ __FILE__, __LINE__, arch_size);
+ }
- while (so = find_solib(so)) {
- if ((address >= (CORE_ADDR) so->inferior_lm.lm_addr) &&
- (address < (CORE_ADDR) so->inferior_lm.lm_addr + so->ld_text))
- return 1;
+ update_solib_list (from_tty, 0);
+
+ for (so = so_list_head; so; so = so->next)
+ {
+ if (so->so_name[0])
+ {
+ if (!header_done)
+ {
+ printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width, "From",
+ addr_width, "To", "Syms Read",
+ "Shared Object Library");
+ header_done++;
+ }
+
+ printf_unfiltered ("%-*s", addr_width,
+ so->textsection != NULL
+ ? local_hex_string_custom (
+ (unsigned long) so->textsection->addr,
+ addr_fmt)
+ : "");
+ printf_unfiltered ("%-*s", addr_width,
+ so->textsection != NULL
+ ? local_hex_string_custom (
+ (unsigned long) so->textsection->endaddr,
+ addr_fmt)
+ : "");
+ printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No");
+ printf_unfiltered ("%s\n", so->so_name);
+ }
+ }
+ if (so_list_head == NULL)
+ {
+ printf_unfiltered ("No shared libraries loaded at this time.\n");
}
- return 0;
}
/*
-** Called by free_all_symtabs
-*/
-void
-clear_solib()
-{
-struct so_list *next;
-
- while (so_list_head) {
- if (so_list_head->sections)
- free (so_list_head->sections);
- if (so_list_head->so_bfd)
- bfd_close (so_list_head->so_bfd);
- next = so_list_head->next;
- free(so_list_head);
- so_list_head = next;
- }
-}
-/* Called by child_create_inferior when the inferior is stopped at its
- first instruction. */
+ GLOBAL FUNCTION
+
+ solib_address -- check to see if an address is in a shared lib
-void
-solib_create_inferior_hook()
+ SYNOPSIS
+
+ char * solib_address (CORE_ADDR address)
+
+ DESCRIPTION
+
+ Provides a hook for other gdb routines to discover whether or
+ not a particular address is within the mapped address space of
+ a shared library.
+
+ For example, this routine is called at one point to disable
+ breakpoints which are in shared libraries that are not currently
+ mapped in.
+ */
+
+char *
+solib_address (CORE_ADDR address)
{
- struct link_dynamic inferior_dynamic_cpy;
- CORE_ADDR inferior_debug_addr;
- struct ld_debug inferior_debug_cpy;
- int in_debugger;
- CORE_ADDR in_debugger_addr;
- CORE_ADDR breakpoint_addr;
- int i;
-
- /* FIXME: We should look around in the executable code to find _DYNAMIC,
- if it isn't in the symbol table. It's not that hard to find...
- Then we can debug stripped executables using shared library symbols. */
- i = lookup_misc_func ("_DYNAMIC");
- if (i < 0) /* Can't find shared lib ptr. */
- return;
-
- /* Get link_dynamic structure */
- read_memory(misc_function_vector[i].address,
- &inferior_dynamic_cpy,
- sizeof(struct link_dynamic));
- /* Calc address of debugger interface structure */
- inferior_debug_addr = (CORE_ADDR)inferior_dynamic_cpy.ldd;
- /* Calc address of `in_debugger' member of debugger interface structure */
- in_debugger_addr = inferior_debug_addr + (CORE_ADDR)((char *)&inferior_debug_cpy.ldd_in_debugger - (char *)&inferior_debug_cpy);
- /* Write a value of 1 to this member. */
- in_debugger = 1;
- write_memory(in_debugger_addr, &in_debugger, sizeof(in_debugger));
-
- /* Now run the target. Seeing `in_debugger' set, it will set a
- breakpoint at some convenient place, remember the original contents
- of that place, and eventually take a SIGTRAP when it runs into the
- breakpoint. We handle this by restoring the contents of the
- breakpointed location (which is only known after it stops),
- chasing around to locate the shared libraries that have been
- loaded, then resuming. */
-
- clear_proceed_status ();
- stop_soon_quietly = 1;
- target_resume (0, 0);
- wait_for_inferior ();
- while (stop_signal != SIGTRAP)
+ register struct so_list *so = 0; /* link map state variable */
+
+ for (so = so_list_head; so; so = so->next)
{
- /* FIXME, what if child has exit()ed? Must exit loop somehow */
- target_resume (0, stop_signal);
- wait_for_inferior ();
+ struct section_table *p;
+
+ for (p = so->sections; p < so->sections_end; p++)
+ {
+ if (p->addr <= address && address < p->endaddr)
+ return (so->so_name);
+ }
}
- stop_soon_quietly = 0;
-
- /* Set `in_debugger' to zero now. WHY, is this needed? */
- in_debugger = 0;
- write_memory(in_debugger_addr, &in_debugger, sizeof(in_debugger));
- read_memory(inferior_debug_addr, &inferior_debug_cpy, sizeof(inferior_debug_cpy));
- /* FIXME: maybe we should add the common symbols from the ldd_cp chain
- * to the misc_function_vector ?
- */
- breakpoint_addr = (CORE_ADDR)inferior_debug_cpy.ldd_bp_addr;
- if (stop_pc - DECR_PC_AFTER_BREAK == breakpoint_addr)
+
+ return (0);
+}
+
+/* Called by free_all_symtabs */
+
+void
+clear_solib (void)
+{
+ /* This function is expected to handle ELF shared libraries. It is
+ also used on Solaris, which can run either ELF or a.out binaries
+ (for compatibility with SunOS 4), both of which can use shared
+ libraries. So we don't know whether we have an ELF executable or
+ an a.out executable until the user chooses an executable file.
+
+ ELF shared libraries don't get mapped into the address space
+ until after the program starts, so we'd better not try to insert
+ breakpoints in them immediately. We have to wait until the
+ dynamic linker has loaded them; we'll hit a bp_shlib_event
+ breakpoint (look for calls to create_solib_event_breakpoint) when
+ it's ready.
+
+ SunOS shared libraries seem to be different --- they're present
+ as soon as the process begins execution, so there's no need to
+ put off inserting breakpoints. There's also nowhere to put a
+ bp_shlib_event breakpoint, so if we put it off, we'll never get
+ around to it.
+
+ So: disable breakpoints only if we're using ELF shared libs. */
+ if (exec_bfd != NULL
+ && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour)
+ disable_breakpoints_in_shlibs (1);
+
+ while (so_list_head)
{
- write_memory(breakpoint_addr, &inferior_debug_cpy.ldd_bp_inst, sizeof(inferior_debug_cpy.ldd_bp_inst));
- if (DECR_PC_AFTER_BREAK)
- {
- stop_pc -= DECR_PC_AFTER_BREAK;
- write_register (PC_REGNUM, stop_pc);
- }
+ struct so_list *so = so_list_head;
+ so_list_head = so->next;
+ free_so (so);
}
- solib_add ((char *)0, 0, (struct target_ops *)0);
+
+ TARGET_SO_CLEAR_SOLIB ();
}
-void
-sharedlibrary_command (args, from_tty)
+static void
+do_clear_solib (PTR dummy)
{
- solib_add (args, from_tty, (struct target_ops *)0);
+ solib_cleanup_queued = 0;
+ clear_solib ();
}
+/* GLOBAL FUNCTION
+
+ solib_create_inferior_hook -- shared library startup support
+
+ SYNOPSIS
+
+ void solib_create_inferior_hook()
+
+ DESCRIPTION
+
+ When gdb starts up the inferior, it nurses it along (through the
+ shell) until it is ready to execute it's first instruction. At this
+ point, this function gets called via expansion of the macro
+ SOLIB_CREATE_INFERIOR_HOOK. */
+
void
-_initialize_solib()
+solib_create_inferior_hook (void)
+{
+ TARGET_SO_SOLIB_CREATE_INFERIOR_HOOK ();
+}
+
+
+/*
+
+ LOCAL FUNCTION
+
+ sharedlibrary_command -- handle command to explicitly add library
+
+ SYNOPSIS
+
+ static void sharedlibrary_command (char *args, int from_tty)
+
+ DESCRIPTION
+
+ */
+
+static void
+sharedlibrary_command (char *args, int from_tty)
{
+ dont_repeat ();
+ solib_add (args, from_tty, (struct target_ops *) 0);
+}
+
- add_com("sharedlibrary", class_files, sharedlibrary_command,
+void
+_initialize_solib (void)
+{
+ add_com ("sharedlibrary", class_files, sharedlibrary_command,
"Load shared object library symbols for files matching REGEXP.");
- add_info("sharedlibrary", solib_info,
- "Status of loaded shared object libraries");
+ add_info ("sharedlibrary", info_sharedlibrary_command,
+ "Status of loaded shared object libraries.");
+
+ add_show_from_set
+ (add_set_cmd ("auto-solib-add", class_support, var_zinteger,
+ (char *) &auto_solib_add,
+ "Set autoloading of shared library symbols.\n\
+If nonzero, symbols from all shared object libraries will be loaded\n\
+automatically when the inferior begins execution or when the dynamic linker\n\
+informs gdb that a new library has been loaded. Otherwise, symbols\n\
+must be loaded manually, using `sharedlibrary'.",
+ &setlist),
+ &showlist);
+
+ add_show_from_set
+ (add_set_cmd ("solib-absolute-prefix", class_support, var_filename,
+ (char *) &solib_absolute_prefix,
+ "Set prefix for loading absolute shared library symbol files.\n\
+For other (relative) files, you can add values using `set solib-search-path'.",
+ &setlist),
+ &showlist);
+ add_show_from_set
+ (add_set_cmd ("solib-search-path", class_support, var_string,
+ (char *) &solib_search_path,
+ "Set the search path for loading non-absolute shared library symbol files.\n\
+This takes precedence over the environment variables PATH and LD_LIBRARY_PATH.",
+ &setlist),
+ &showlist);
+
}