/* Handle shared libraries for GDB, the GNU Debugger.
- Copyright 1990, 91, 92, 93, 94, 95, 96, 98, 1999, 2000
- Free Software Foundation, Inc.
+
+ Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+ 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
This file is part of GDB.
#include "environ.h"
#include "language.h"
#include "gdbcmd.h"
+#include "completer.h"
+#include "filenames.h" /* for DOSish file names */
#include "solist.h"
+#include <readline/readline.h>
/* external data declarations */
/* Local function prototypes */
-static void do_clear_solib (PTR);
+static void do_clear_solib (void *);
/* 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. */
and LD_LIBRARY_PATH. */
static char *solib_search_path = NULL;
+/*
+
+ 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;
+ char *p = in_pathname;
+
+ while (*p && !IS_DIR_SEPARATOR (*p))
+ p++;
+
+ if (*p)
+ {
+ if (! IS_ABSOLUTE_PATH (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
+ && IS_DIR_SEPARATOR (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 the search in solib_absolute_prefix failed, and the path name is
+ absolute at this point, make it relative. (openp will try and open the
+ file according to its absolute path otherwise, which is not what we want.)
+ Affects subsequent searches for this solib. */
+ if (found_file < 0 && IS_ABSOLUTE_PATH (in_pathname))
+ {
+ /* First, get rid of any drive letters etc. */
+ while (!IS_DIR_SEPARATOR (*in_pathname))
+ in_pathname++;
+
+ /* Next, get rid of all leading dir separators. */
+ while (IS_DIR_SEPARATOR (*in_pathname))
+ in_pathname++;
+ }
+
+ /* 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 solib_search_path (if any) for the basename
+ only (ignoring the path). This is to allow reading solibs from a path
+ that differs from the opened path. */
+ if (found_file < 0 && solib_search_path != NULL)
+ found_file = openp (solib_search_path,
+ 1, lbasename (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 = xstrdup (temp_pathname);
+ return found_file;
+}
+
+
/*
LOCAL FUNCTION
*/
static int
-solib_map_sections (PTR arg)
+solib_map_sections (void *arg)
{
struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */
char *filename;
filename = tilde_expand (so->so_name);
- if (solib_absolute_prefix && ROOTED_P (filename))
- /* Prefix shared libraries with absolute filenames with
- SOLIB_ABSOLUTE_PREFIX. */
- {
- char *pfxed_fn;
- int pfx_len;
-
- pfx_len = strlen (solib_absolute_prefix);
-
- /* Remove trailing slashes. */
- while (pfx_len > 0 && SLASH_P (solib_absolute_prefix[pfx_len - 1]))
- pfx_len--;
-
- pfxed_fn = xmalloc (pfx_len + strlen (filename) + 1);
- strcpy (pfxed_fn, solib_absolute_prefix);
- strcat (pfxed_fn, filename);
- free (filename);
-
- filename = pfxed_fn;
- }
-
- old_chain = make_cleanup (free, filename);
+ old_chain = make_cleanup (xfree, filename);
+ scratch_chan = solib_open (filename, &scratch_pathname);
- scratch_chan = -1;
-
- if (solib_search_path)
- scratch_chan = openp (solib_search_path,
- 1, filename, O_RDONLY, 0, &scratch_pathname);
- if (scratch_chan < 0)
- scratch_chan = openp (get_in_environ (inferior_environ, "PATH"),
- 1, filename, O_RDONLY, 0, &scratch_pathname);
- if (scratch_chan < 0)
- {
- scratch_chan = openp (get_in_environ
- (inferior_environ, "LD_LIBRARY_PATH"),
- 1, filename, O_RDONLY, 0, &scratch_pathname);
- }
if (scratch_chan < 0)
{
perror_with_name (filename);
}
- /* Leave scratch_pathname allocated. abfd->name will point to it. */
+ /* Leave scratch_pathname allocated. abfd->name will point to it. */
abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan);
if (!abfd)
{
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;
+ abfd->cacheable = 1;
- /* copy full path name into so_name, so that later symbol_file_add can find
- it */
+ /* 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);
/* Relocate the section binding addresses as recorded in the shared
object's file by the base address to which the object was actually
mapped. */
- p->addr += TARGET_SO_LM_ADDR (so);
- p->endaddr += TARGET_SO_LM_ADDR (so);
- so->lmend = max (p->endaddr, so->lmend);
+ TARGET_SO_RELOCATE_SECTION_ADDRESSES (so, p);
if (STREQ (p->the_bfd_section->name, ".text"))
{
so->textsection = p;
char *bfd_filename = 0;
if (so->sections)
- free (so->sections);
+ xfree (so->sections);
if (so->abfd)
{
}
if (bfd_filename)
- free (bfd_filename);
+ xfree (bfd_filename);
TARGET_SO_FREE_SO (so);
- free (so);
+ xfree (so);
}
/* A small stub to get us past the arg-passing pinhole of catch_errors. */
static int
-symbol_add_stub (PTR arg)
+symbol_add_stub (void *arg)
{
register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */
struct section_addr_info *sap;
- CORE_ADDR lowest_addr = 0;
- int lowest_index;
- asection *lowest_sect = NULL;
/* Have we already loaded this shared object? */
ALL_OBJFILES (so->objfile)
return 1;
}
- /* Find the shared object's text segment. */
- if (so->textsection)
- {
- lowest_addr = so->textsection->addr;
- lowest_sect = bfd_get_section_by_name (so->abfd, ".text");
- lowest_index = lowest_sect->index;
- }
- else if (so->abfd != NULL)
- {
- /* If we didn't find a mapped non zero sized .text section, set
- up lowest_addr so that the relocation in symbol_file_add does
- no harm. */
- lowest_sect = bfd_get_section_by_name (so->abfd, ".text");
- if (lowest_sect == NULL)
- bfd_map_over_sections (so->abfd, find_lowest_section,
- (PTR) &lowest_sect);
- if (lowest_sect)
- {
- lowest_addr = bfd_section_vma (so->abfd, lowest_sect)
- + TARGET_SO_LM_ADDR (so);
- lowest_index = lowest_sect->index;
- }
- }
-
sap = build_section_addr_info_from_section_table (so->sections,
so->sections_end);
- sap->other[lowest_index].addr = lowest_addr;
-
so->objfile = symbol_file_add (so->so_name, so->from_tty,
sap, 0, OBJF_SHARED);
free_section_addr_info (sap);
symbols now! */
if (attach_flag &&
symfile_objfile == NULL)
- catch_errors (TARGET_SO_OPEN_SYMBOL_FILE_OBJECT, (PTR) &from_tty,
+ catch_errors (TARGET_SO_OPEN_SYMBOL_FILE_OBJECT, &from_tty,
"Error reading attached process's symbol file.\n",
RETURN_MASK_ALL);
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)
+ /* If requested, add the shared object's sections to the TARGET's
+ section table. Do this immediately after mapping the object so
+ that later nodes in the list can query this object, as is needed
+ in solib-osf.c. */
+ if (target)
{
- int space = target_resize_to_sections (target, new_sections);
-
- for (i = inferior; i; i = i->next)
+ int count = (i->sections_end - i->sections);
+ if (count > 0)
{
- int count = (i->sections_end - i->sections);
+ int space = target_resize_to_sections (target, count);
memcpy (target->to_sections + space,
i->sections,
count * sizeof (i->sections[0]));
- space += count;
}
}
}
SYNOPSIS
- void solib_add (char *pattern, int from_tty, struct target_ops *TARGET)
+ void solib_add (char *pattern, int from_tty, struct target_ops
+ *TARGET, int readsyms)
DESCRIPTION
match PATTERN. (If we've already read a shared object's symbol
info, leave it alone.) If PATTERN is zero, read them all.
+ If READSYMS is 0, defer reading symbolic information until later
+ but still do any needed low level processing.
+
FROM_TTY and TARGET are as described for update_solib_list, above. */
void
-solib_add (char *pattern, int from_tty, struct target_ops *target)
+solib_add (char *pattern, int from_tty, struct target_ops *target, int readsyms)
{
struct so_list *gdb;
printf_unfiltered ("Symbols already loaded for %s\n",
gdb->so_name);
}
- else
+ else if (readsyms)
{
if (catch_errors
(symbol_add_stub, gdb,
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)
+ if (TARGET_PTR_BIT == 32)
{
addr_width = 8 + 4;
addr_fmt = "08l";
}
- else if (arch_size == 64)
+ else if (TARGET_PTR_BIT == 64)
{
addr_width = 16 + 4;
addr_fmt = "016l";
}
+ else
+ {
+ internal_error (__FILE__, __LINE__,
+ "TARGET_PTR_BIT returned unknown size %d",
+ TARGET_PTR_BIT);
+ }
update_solib_list (from_tty, 0);
}
printf_unfiltered ("%-*s", addr_width,
- local_hex_string_custom (
- (unsigned long) TARGET_SO_LM_ADDR (so),
- addr_fmt));
+ so->textsection != NULL
+ ? local_hex_string_custom (
+ (LONGEST) so->textsection->addr,
+ addr_fmt)
+ : "");
printf_unfiltered ("%-*s", addr_width,
- local_hex_string_custom ((unsigned long) so->lmend,
- addr_fmt));
+ so->textsection != NULL
+ ? local_hex_string_custom (
+ (LONGEST) so->textsection->endaddr,
+ addr_fmt)
+ : "");
printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No");
printf_unfiltered ("%s\n", so->so_name);
}
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. Any address between the base mapping address
- and the first address beyond the end of the last mapping, is
- considered to be within the shared library address space, for
- our purposes.
+ a shared library.
For example, this routine is called at one point to disable
breakpoints which are in shared libraries that are not currently
for (so = so_list_head; so; so = so->next)
{
- if (TARGET_SO_LM_ADDR (so) <= address && address < so->lmend)
- return (so->so_name);
+ struct section_table *p;
+
+ for (p = so->sections; p < so->sections_end; p++)
+ {
+ if (p->addr <= address && address < p->endaddr)
+ return (so->so_name);
+ }
}
return (0);
{
struct so_list *so = so_list_head;
so_list_head = so->next;
+ if (so->abfd)
+ remove_target_sections (so->abfd);
free_so (so);
}
}
static void
-do_clear_solib (PTR dummy)
+do_clear_solib (void *dummy)
{
solib_cleanup_queued = 0;
clear_solib ();
TARGET_SO_SOLIB_CREATE_INFERIOR_HOOK ();
}
+/* GLOBAL FUNCTION
+
+ in_solib_dynsym_resolve_code -- check to see if an address is in
+ dynamic loader's dynamic symbol
+ resolution code
+
+ SYNOPSIS
+
+ int in_solib_dynsym_resolve_code (CORE_ADDR pc)
+
+ DESCRIPTION
+
+ Determine if PC is in the dynamic linker's symbol resolution
+ code. Return 1 if so, 0 otherwise.
+*/
+
+int
+in_solib_dynsym_resolve_code (CORE_ADDR pc)
+{
+ return TARGET_SO_IN_DYNSYM_RESOLVE_CODE (pc);
+}
/*
sharedlibrary_command (char *args, int from_tty)
{
dont_repeat ();
- solib_add (args, from_tty, (struct target_ops *) 0);
+ solib_add (args, from_tty, (struct target_ops *) 0, 1);
}
+/* LOCAL FUNCTION
+
+ no_shared_libraries -- handle command to explicitly discard symbols
+ from shared libraries.
+
+ DESCRIPTION
+
+ Implements the command "nosharedlibrary", which discards symbols
+ that have been auto-loaded from shared libraries. Symbols from
+ shared libraries that were added by explicit request of the user
+ are not discarded. Also called from remote.c. */
+
+void
+no_shared_libraries (char *ignored, int from_tty)
+{
+ objfile_purge_solibs ();
+ do_clear_solib (NULL);
+}
+
+static void
+reload_shared_libraries (char *ignored, int from_tty)
+{
+ no_shared_libraries (NULL, from_tty);
+ solib_add (NULL, from_tty, NULL, auto_solib_add);
+}
void
_initialize_solib (void)
{
+ struct cmd_list_element *c;
+
add_com ("sharedlibrary", class_files, sharedlibrary_command,
"Load shared object library symbols for files matching REGEXP.");
add_info ("sharedlibrary", info_sharedlibrary_command,
"Status of loaded shared object libraries.");
+ add_com ("nosharedlibrary", class_files, no_shared_libraries,
+ "Unload all shared object library symbols.");
add_show_from_set
- (add_set_cmd ("auto-solib-add", class_support, var_zinteger,
+ (add_set_cmd ("auto-solib-add", class_support, var_boolean,
(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'.",
+If \"on\", symbols from all shared object libraries will be loaded\n\
+automatically when the inferior begins execution, when the dynamic linker\n\
+informs gdb that a new library has been loaded, or when attaching to the\n\
+inferior. Otherwise, symbols 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\
+ c = 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\
+ &setlist);
+ add_show_from_set (c, &showlist);
+ set_cmd_cfunc (c, reload_shared_libraries);
+ set_cmd_completer (c, filename_completer);
+
+ /* Set the default value of "solib-absolute-prefix" from the sysroot, if
+ one is set. */
+ solib_absolute_prefix = xstrdup (gdb_sysroot);
+
+ c = 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);
-
+ &setlist);
+ add_show_from_set (c, &showlist);
+ set_cmd_cfunc (c, reload_shared_libraries);
+ set_cmd_completer (c, filename_completer);
}
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