/* Core dump and executable file functions above target vector, for GDB.
- Copyright 1986, 1987, 1989, 1991-1994, 2000
+
+ Copyright (C) 1986-1987, 1989, 1991-1994, 1996-2001, 2003, 2006-2012
Free Software Foundation, Inc.
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdb_string.h"
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
-#include "frame.h" /* required by inferior.h */
#include "inferior.h"
#include "symtab.h"
#include "command.h"
#include "target.h"
#include "gdbcore.h"
#include "dis-asm.h"
-#include "language.h"
#include "gdb_stat.h"
-#include "symfile.h"
-#include "objfiles.h"
#include "completer.h"
+#include "exceptions.h"
+#include "observer.h"
/* Local function declarations. */
extern void _initialize_core (void);
static void call_extra_exec_file_hooks (char *filename);
-/* You can have any number of hooks for `exec_file_command' command to call.
- If there's only one hook, it is set in exec_file_display hook.
- If there are two or more hooks, they are set in exec_file_extra_hooks[],
- and exec_file_display_hook is set to a function that calls all of them.
- This extra complexity is needed to preserve compatibility with
- old code that assumed that only one hook could be set, and which called
- exec_file_display_hook directly. */
+/* You can have any number of hooks for `exec_file_command' command to
+ call. If there's only one hook, it is set in exec_file_display
+ hook. If there are two or more hooks, they are set in
+ exec_file_extra_hooks[], and deprecated_exec_file_display_hook is
+ set to a function that calls all of them. This extra complexity is
+ needed to preserve compatibility with old code that assumed that
+ only one hook could be set, and which called
+ deprecated_exec_file_display_hook directly. */
typedef void (*hook_type) (char *);
-hook_type exec_file_display_hook; /* the original hook */
-static hook_type *exec_file_extra_hooks; /* array of additional hooks */
-static int exec_file_hook_count = 0; /* size of array */
+hook_type deprecated_exec_file_display_hook; /* The original hook. */
+static hook_type *exec_file_extra_hooks; /* Array of additional
+ hooks. */
+static int exec_file_hook_count = 0; /* Size of array. */
/* Binary file diddling handle for the core file. */
bfd *core_bfd = NULL;
+
+/* corelow.c target. It is never NULL after GDB initialization. */
+
+struct target_ops *core_target;
\f
/* Backward compatability with old way of specifying core files. */
void
core_file_command (char *filename, int from_tty)
{
- struct target_ops *t;
-
- dont_repeat (); /* Either way, seems bogus. */
-
- t = find_core_target ();
- if (t != NULL)
- if (!filename)
- (t->to_detach) (filename, from_tty);
- else
- {
- /* Yes, we were given the path of a core file. Do we already
- have a symbol file? If not, can we determine it from the
- core file? If we can, do so.
- */
-#ifdef HPUXHPPA
- if (symfile_objfile == NULL)
- {
- char *symfile;
- symfile = t->to_core_file_to_sym_file (filename);
- if (symfile)
- {
- char *symfile_copy = xstrdup (symfile);
-
- make_cleanup (free, symfile_copy);
- symbol_file_command (symfile_copy, from_tty);
- }
- else
- warning ("Unknown symbols for '%s'; use the 'symbol-file' command.", filename);
- }
-#endif
- (t->to_open) (filename, from_tty);
- }
+ dont_repeat (); /* Either way, seems bogus. */
+
+ gdb_assert (core_target != NULL);
+
+ if (!filename)
+ (core_target->to_detach) (core_target, filename, from_tty);
else
- error ("GDB can't read core files on this machine.");
+ (core_target->to_open) (filename, from_tty);
}
\f
-/* If there are two or more functions that wish to hook into exec_file_command,
- * this function will call all of the hook functions. */
+/* If there are two or more functions that wish to hook into
+ exec_file_command, this function will call all of the hook
+ functions. */
static void
call_extra_exec_file_hooks (char *filename)
{
hook_type *new_array;
- if (exec_file_display_hook != NULL)
+ if (deprecated_exec_file_display_hook != NULL)
{
/* There's already a hook installed. Arrange to have both it
- * and the subsequent hooks called. */
+ and the subsequent hooks called. */
if (exec_file_hook_count == 0)
{
- /* If this is the first extra hook, initialize the hook array. */
- exec_file_extra_hooks = (hook_type *) xmalloc (sizeof (hook_type));
- exec_file_extra_hooks[0] = exec_file_display_hook;
- exec_file_display_hook = call_extra_exec_file_hooks;
+ /* If this is the first extra hook, initialize the hook
+ array. */
+ exec_file_extra_hooks = (hook_type *)
+ xmalloc (sizeof (hook_type));
+ exec_file_extra_hooks[0] = deprecated_exec_file_display_hook;
+ deprecated_exec_file_display_hook = call_extra_exec_file_hooks;
exec_file_hook_count = 1;
}
Yes, it's inefficient to grow it by one each time but since
this is hardly ever called it's not a big deal. */
exec_file_hook_count++;
- new_array =
- (hook_type *) xrealloc (exec_file_extra_hooks,
- exec_file_hook_count * sizeof (hook_type));
+ new_array = (hook_type *)
+ xrealloc (exec_file_extra_hooks,
+ exec_file_hook_count * sizeof (hook_type));
exec_file_extra_hooks = new_array;
exec_file_extra_hooks[exec_file_hook_count - 1] = hook;
}
else
- exec_file_display_hook = hook;
-}
-
-/* The exec file must be closed before running an inferior.
- If it is needed again after the inferior dies, it must
- be reopened. */
-
-void
-close_exec_file (void)
-{
-#if 0 /* FIXME */
- if (exec_bfd)
- bfd_tempclose (exec_bfd);
-#endif
+ deprecated_exec_file_display_hook = hook;
}
void
reopen_exec_file (void)
{
-#if 0 /* FIXME */
- if (exec_bfd)
- bfd_reopen (exec_bfd);
-#else
char *filename;
int res;
struct stat st;
- long mtime;
+ struct cleanup *cleanups;
- /* Don't do anything if the current target isn't exec. */
- if (exec_bfd == NULL || strcmp (target_shortname, "exec") != 0)
+ /* Don't do anything if there isn't an exec file. */
+ if (exec_bfd == NULL)
return;
- /* If the timestamp of the exec file has changed, reopen it. */
+ /* If the timestamp of the exec file has changed, reopen it. */
filename = xstrdup (bfd_get_filename (exec_bfd));
- make_cleanup (free, filename);
- mtime = bfd_get_mtime (exec_bfd);
+ cleanups = make_cleanup (xfree, filename);
res = stat (filename, &st);
- if (mtime && mtime != st.st_mtime)
- exec_file_command (filename, 0);
-#endif
+ if (exec_bfd_mtime && exec_bfd_mtime != st.st_mtime)
+ exec_file_attach (filename, 0);
+ else
+ /* If we accessed the file since last opening it, close it now;
+ this stops GDB from holding the executable open after it
+ exits. */
+ bfd_cache_close_all ();
+
+ do_cleanups (cleanups);
}
\f
/* If we have both a core file and an exec file,
if (exec_bfd && core_bfd)
{
if (!core_file_matches_executable_p (core_bfd, exec_bfd))
- warning ("core file may not match specified executable file.");
+ warning (_("core file may not match specified executable file."));
else if (bfd_get_mtime (exec_bfd) > bfd_get_mtime (core_bfd))
- warning ("exec file is newer than core file.");
+ warning (_("exec file is newer than core file."));
}
}
if (!err)
return NULL;
- error ("No executable file specified.\n\
-Use the \"file\" or \"exec-file\" command.");
+ error (_("No executable file specified.\n\
+Use the \"file\" or \"exec-file\" command."));
return NULL;
}
\f
-/* Report a memory error with error(). */
+/* Report a memory error by throwing a MEMORY_ERROR error. */
void
memory_error (int status, CORE_ADDR memaddr)
{
- struct ui_file *tmp_stream = mem_fileopen ();
- make_cleanup_ui_file_delete (tmp_stream);
-
if (status == EIO)
- {
- /* Actually, address between memaddr and memaddr + len
- was out of bounds. */
- fprintf_unfiltered (tmp_stream, "Cannot access memory at address ");
- print_address_numeric (memaddr, 1, tmp_stream);
- }
+ /* Actually, address between memaddr and memaddr + len was out of
+ bounds. */
+ throw_error (MEMORY_ERROR,
+ _("Cannot access memory at address %s"),
+ paddress (target_gdbarch, memaddr));
else
- {
- fprintf_filtered (tmp_stream, "Error accessing memory address ");
- print_address_numeric (memaddr, 1, tmp_stream);
- fprintf_filtered (tmp_stream, ": %s.",
- safe_strerror (status));
- }
-
- error_stream (tmp_stream);
+ throw_error (MEMORY_ERROR,
+ _("Error accessing memory address %s: %s."),
+ paddress (target_gdbarch, memaddr),
+ safe_strerror (status));
}
/* Same as target_read_memory, but report an error if can't read. */
+
void
-read_memory (CORE_ADDR memaddr, char *myaddr, int len)
+read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
{
int status;
+
status = target_read_memory (memaddr, myaddr, len);
if (status != 0)
memory_error (status, memaddr);
}
-/* Like target_read_memory, but slightly different parameters. */
-int
-dis_asm_read_memory (bfd_vma memaddr, bfd_byte *myaddr, unsigned int len,
- disassemble_info *info)
-{
- return target_read_memory (memaddr, (char *) myaddr, len);
-}
+/* Same as target_read_stack, but report an error if can't read. */
-/* Like memory_error with slightly different parameters. */
void
-dis_asm_memory_error (int status, bfd_vma memaddr, disassemble_info *info)
+read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
{
- memory_error (status, memaddr);
+ int status;
+
+ status = target_read_stack (memaddr, myaddr, len);
+ if (status != 0)
+ memory_error (status, memaddr);
}
-/* Like print_address with slightly different parameters. */
-void
-dis_asm_print_address (bfd_vma addr, struct disassemble_info *info)
+/* Argument / return result struct for use with
+ do_captured_read_memory_integer(). MEMADDR and LEN are filled in
+ by gdb_read_memory_integer(). RESULT is the contents that were
+ successfully read from MEMADDR of length LEN. */
+
+struct captured_read_memory_integer_arguments
{
- print_address (addr, info->stream);
+ CORE_ADDR memaddr;
+ int len;
+ enum bfd_endian byte_order;
+ LONGEST result;
+};
+
+/* Helper function for gdb_read_memory_integer(). DATA must be a
+ pointer to a captured_read_memory_integer_arguments struct.
+ Return 1 if successful. Note that the catch_errors() interface
+ will return 0 if an error occurred while reading memory. This
+ choice of return code is so that we can distinguish between
+ success and failure. */
+
+static int
+do_captured_read_memory_integer (void *data)
+{
+ struct captured_read_memory_integer_arguments *args
+ = (struct captured_read_memory_integer_arguments*) data;
+ CORE_ADDR memaddr = args->memaddr;
+ int len = args->len;
+ enum bfd_endian byte_order = args->byte_order;
+
+ args->result = read_memory_integer (memaddr, len, byte_order);
+
+ return 1;
}
-/* Same as target_write_memory, but report an error if can't write. */
-void
-write_memory (CORE_ADDR memaddr, char *myaddr, int len)
+/* Read memory at MEMADDR of length LEN and put the contents in
+ RETURN_VALUE. Return 0 if MEMADDR couldn't be read and non-zero
+ if successful. */
+
+int
+safe_read_memory_integer (CORE_ADDR memaddr, int len,
+ enum bfd_endian byte_order,
+ LONGEST *return_value)
{
int status;
+ struct captured_read_memory_integer_arguments args;
- status = target_write_memory (memaddr, myaddr, len);
- if (status != 0)
- memory_error (status, memaddr);
-}
+ args.memaddr = memaddr;
+ args.len = len;
+ args.byte_order = byte_order;
+
+ status = catch_errors (do_captured_read_memory_integer, &args,
+ "", RETURN_MASK_ALL);
+ if (status)
+ *return_value = args.result;
-/* Read an integer from debugged memory, given address and number of bytes. */
+ return status;
+}
LONGEST
-read_memory_integer (CORE_ADDR memaddr, int len)
+read_memory_integer (CORE_ADDR memaddr, int len,
+ enum bfd_endian byte_order)
{
- char buf[sizeof (LONGEST)];
+ gdb_byte buf[sizeof (LONGEST)];
read_memory (memaddr, buf, len);
- return extract_signed_integer (buf, len);
+ return extract_signed_integer (buf, len, byte_order);
}
ULONGEST
-read_memory_unsigned_integer (CORE_ADDR memaddr, int len)
+read_memory_unsigned_integer (CORE_ADDR memaddr, int len,
+ enum bfd_endian byte_order)
{
- char buf[sizeof (ULONGEST)];
+ gdb_byte buf[sizeof (ULONGEST)];
read_memory (memaddr, buf, len);
- return extract_unsigned_integer (buf, len);
+ return extract_unsigned_integer (buf, len, byte_order);
}
void
read_memory_string (CORE_ADDR memaddr, char *buffer, int max_len)
{
- register char *cp;
- register int i;
+ char *cp;
+ int i;
int cnt;
cp = buffer;
break;
}
}
-\f
-#if 0
-/* Enable after 4.12. It is not tested. */
+CORE_ADDR
+read_memory_typed_address (CORE_ADDR addr, struct type *type)
+{
+ gdb_byte *buf = alloca (TYPE_LENGTH (type));
-/* Search code. Targets can just make this their search function, or
- if the protocol has a less general search function, they can call this
- in the cases it can't handle. */
+ read_memory (addr, buf, TYPE_LENGTH (type));
+ return extract_typed_address (buf, type);
+}
+
+/* Same as target_write_memory, but report an error if can't
+ write. */
void
-generic_search (int len, char *data, char *mask, CORE_ADDR startaddr,
- int increment, CORE_ADDR lorange, CORE_ADDR hirange,
- CORE_ADDR *addr_found, char *data_found)
+write_memory (CORE_ADDR memaddr,
+ const bfd_byte *myaddr, ssize_t len)
{
- int i;
- CORE_ADDR curaddr = startaddr;
+ int status;
- while (curaddr >= lorange && curaddr < hirange)
- {
- read_memory (curaddr, data_found, len);
- for (i = 0; i < len; ++i)
- if ((data_found[i] & mask[i]) != data[i])
- goto try_again;
- /* It matches. */
- *addr_found = curaddr;
- return;
-
- try_again:
- curaddr += increment;
- }
- *addr_found = (CORE_ADDR) 0;
- return;
+ status = target_write_memory (memaddr, myaddr, len);
+ if (status != 0)
+ memory_error (status, memaddr);
+}
+
+/* Same as write_memory, but notify 'memory_changed' observers. */
+
+void
+write_memory_with_notification (CORE_ADDR memaddr, const bfd_byte *myaddr,
+ ssize_t len)
+{
+ write_memory (memaddr, myaddr, len);
+ observer_notify_memory_changed (memaddr, len, myaddr);
+}
+
+/* Store VALUE at ADDR in the inferior as a LEN-byte unsigned
+ integer. */
+void
+write_memory_unsigned_integer (CORE_ADDR addr, int len,
+ enum bfd_endian byte_order,
+ ULONGEST value)
+{
+ gdb_byte *buf = alloca (len);
+
+ store_unsigned_integer (buf, len, byte_order, value);
+ write_memory (addr, buf, len);
+}
+
+/* Store VALUE at ADDR in the inferior as a LEN-byte signed
+ integer. */
+void
+write_memory_signed_integer (CORE_ADDR addr, int len,
+ enum bfd_endian byte_order,
+ LONGEST value)
+{
+ gdb_byte *buf = alloca (len);
+
+ store_signed_integer (buf, len, byte_order, value);
+ write_memory (addr, buf, len);
}
-#endif /* 0 */
\f
/* The current default bfd target. Points to storage allocated for
gnutarget_string. */
/* Same thing, except it is "auto" not NULL for the default case. */
static char *gnutarget_string;
+static void
+show_gnutarget_string (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c,
+ const char *value)
+{
+ fprintf_filtered (file,
+ _("The current BFD target is \"%s\".\n"), value);
+}
-static void set_gnutarget_command (char *, int, struct cmd_list_element *);
+static void set_gnutarget_command (char *, int,
+ struct cmd_list_element *);
static void
-set_gnutarget_command (char *ignore, int from_tty, struct cmd_list_element *c)
+set_gnutarget_command (char *ignore, int from_tty,
+ struct cmd_list_element *c)
{
- if (STREQ (gnutarget_string, "auto"))
+ if (strcmp (gnutarget_string, "auto") == 0)
gnutarget = NULL;
else
gnutarget = gnutarget_string;
set_gnutarget (char *newtarget)
{
if (gnutarget_string != NULL)
- free (gnutarget_string);
- gnutarget_string = savestring (newtarget, strlen (newtarget));
+ xfree (gnutarget_string);
+ gnutarget_string = xstrdup (newtarget);
set_gnutarget_command (NULL, 0, NULL);
}
_initialize_core (void)
{
struct cmd_list_element *c;
- c = add_cmd ("core-file", class_files, core_file_command,
- "Use FILE as core dump for examining memory and registers.\n\
+
+ c = add_cmd ("core-file", class_files, core_file_command, _("\
+Use FILE as core dump for examining memory and registers.\n\
No arg means have no core file. This command has been superseded by the\n\
-`target core' and `detach' commands.", &cmdlist);
- c->completer = filename_completer;
-
- c = add_set_cmd ("gnutarget", class_files, var_string_noescape,
- (char *) &gnutarget_string,
- "Set the current BFD target.\n\
-Use `set gnutarget auto' to specify automatic detection.",
- &setlist);
- c->function.sfunc = set_gnutarget_command;
- add_show_from_set (c, &showlist);
+`target core' and `detach' commands."), &cmdlist);
+ set_cmd_completer (c, filename_completer);
+
+
+ add_setshow_string_noescape_cmd ("gnutarget", class_files,
+ &gnutarget_string, _("\
+Set the current BFD target."), _("\
+Show the current BFD target."), _("\
+Use `set gnutarget auto' to specify automatic detection."),
+ set_gnutarget_command,
+ show_gnutarget_string,
+ &setlist, &showlist);
if (getenv ("GNUTARGET"))
set_gnutarget (getenv ("GNUTARGET"));
projects / deliverable / binutils-gdb.git / blobdiff