290 lines
6.8 KiB
C
290 lines
6.8 KiB
C
/* Core dump and executable file functions above target vector, for GDB.
|
||
Copyright 1986, 1987, 1989, 1991, 1992 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
|
||
(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.
|
||
|
||
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. */
|
||
|
||
#include "defs.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 "gdbcmd.h"
|
||
#include "bfd.h"
|
||
#include "target.h"
|
||
#include "gdbcore.h"
|
||
#include "dis-asm.h"
|
||
|
||
extern char registers[];
|
||
|
||
/* Hook for `exec_file_command' command to call. */
|
||
|
||
void (*exec_file_display_hook) PARAMS ((char *)) = NULL;
|
||
|
||
/* Binary file diddling handle for the core file. */
|
||
|
||
bfd *core_bfd = NULL;
|
||
|
||
|
||
/* Backward compatability with old way of specifying core files. */
|
||
|
||
void
|
||
core_file_command (filename, from_tty)
|
||
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
|
||
(t->to_open) (filename, from_tty);
|
||
else
|
||
error ("GDB can't read core files on this machine.");
|
||
}
|
||
|
||
|
||
/* Call this to specify the hook for exec_file_command to call back.
|
||
This is called from the x-window display code. */
|
||
|
||
void
|
||
specify_exec_file_hook (hook)
|
||
void (*hook) PARAMS ((char *));
|
||
{
|
||
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 ()
|
||
{
|
||
#ifdef FIXME
|
||
if (exec_bfd)
|
||
bfd_tempclose (exec_bfd);
|
||
#endif
|
||
}
|
||
|
||
void
|
||
reopen_exec_file ()
|
||
{
|
||
#ifdef FIXME
|
||
if (exec_bfd)
|
||
bfd_reopen (exec_bfd);
|
||
#endif
|
||
}
|
||
|
||
/* If we have both a core file and an exec file,
|
||
print a warning if they don't go together. */
|
||
|
||
void
|
||
validate_files ()
|
||
{
|
||
if (exec_bfd && core_bfd)
|
||
{
|
||
if (!core_file_matches_executable_p (core_bfd, exec_bfd))
|
||
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.");
|
||
}
|
||
}
|
||
|
||
/* Return the name of the executable file as a string.
|
||
ERR nonzero means get error if there is none specified;
|
||
otherwise return 0 in that case. */
|
||
|
||
char *
|
||
get_exec_file (err)
|
||
int err;
|
||
{
|
||
if (exec_bfd) return bfd_get_filename(exec_bfd);
|
||
if (!err) return NULL;
|
||
|
||
error ("No executable file specified.\n\
|
||
Use the \"file\" or \"exec-file\" command.");
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* Report a memory error with error(). */
|
||
|
||
void
|
||
memory_error (status, memaddr)
|
||
int status;
|
||
CORE_ADDR memaddr;
|
||
{
|
||
|
||
if (status == EIO)
|
||
{
|
||
/* Actually, address between memaddr and memaddr + len
|
||
was out of bounds. */
|
||
error ("Cannot access memory at address %s.", local_hex_string(memaddr));
|
||
}
|
||
else
|
||
{
|
||
error ("Error accessing memory address %s: %s.",
|
||
local_hex_string (memaddr), safe_strerror (status));
|
||
}
|
||
}
|
||
|
||
/* Same as target_read_memory, but report an error if can't read. */
|
||
void
|
||
read_memory (memaddr, myaddr, len)
|
||
CORE_ADDR memaddr;
|
||
char *myaddr;
|
||
int 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 (memaddr, myaddr, len, info)
|
||
bfd_vma memaddr;
|
||
bfd_byte *myaddr;
|
||
int len;
|
||
disassemble_info *info;
|
||
{
|
||
return target_read_memory (memaddr, (char *) myaddr, len);
|
||
}
|
||
|
||
/* Like memory_error with slightly different parameters. */
|
||
void
|
||
dis_asm_memory_error (status, memaddr, info)
|
||
int status;
|
||
bfd_vma memaddr;
|
||
disassemble_info *info;
|
||
{
|
||
memory_error (status, memaddr);
|
||
}
|
||
|
||
/* Like print_address with slightly different parameters. */
|
||
void
|
||
dis_asm_print_address (addr, info)
|
||
bfd_vma addr;
|
||
struct disassemble_info *info;
|
||
{
|
||
print_address (addr, info->stream);
|
||
}
|
||
|
||
/* Same as target_write_memory, but report an error if can't write. */
|
||
void
|
||
write_memory (memaddr, myaddr, len)
|
||
CORE_ADDR memaddr;
|
||
char *myaddr;
|
||
int len;
|
||
{
|
||
int status;
|
||
|
||
status = target_write_memory (memaddr, myaddr, len);
|
||
if (status != 0)
|
||
memory_error (status, memaddr);
|
||
}
|
||
|
||
/* Read an integer from debugged memory, given address and number of bytes. */
|
||
|
||
LONGEST
|
||
read_memory_integer (memaddr, len)
|
||
CORE_ADDR memaddr;
|
||
int len;
|
||
{
|
||
char buf[sizeof (LONGEST)];
|
||
|
||
read_memory (memaddr, buf, len);
|
||
return extract_signed_integer (buf, len);
|
||
}
|
||
|
||
unsigned LONGEST
|
||
read_memory_unsigned_integer (memaddr, len)
|
||
CORE_ADDR memaddr;
|
||
int len;
|
||
{
|
||
char buf[sizeof (unsigned LONGEST)];
|
||
|
||
read_memory (memaddr, buf, len);
|
||
return extract_unsigned_integer (buf, len);
|
||
}
|
||
|
||
/* The current default bfd target. Points to storage allocated for
|
||
gnutarget_string. */
|
||
char *gnutarget;
|
||
|
||
/* Same thing, except it is "auto" not NULL for the default case. */
|
||
static char *gnutarget_string;
|
||
|
||
static void set_gnutarget_command
|
||
PARAMS ((char *, int, struct cmd_list_element *));
|
||
|
||
static void
|
||
set_gnutarget_command (ignore, from_tty, c)
|
||
char *ignore;
|
||
int from_tty;
|
||
struct cmd_list_element *c;
|
||
{
|
||
if (STREQ (gnutarget_string, "auto"))
|
||
gnutarget = NULL;
|
||
else
|
||
gnutarget = gnutarget_string;
|
||
}
|
||
|
||
/* Set the gnutarget. */
|
||
void
|
||
set_gnutarget (newtarget)
|
||
char *newtarget;
|
||
{
|
||
if (gnutarget_string != NULL)
|
||
free (gnutarget_string);
|
||
gnutarget_string = savestring (newtarget, strlen (newtarget));
|
||
set_gnutarget_command (NULL, 0, NULL);
|
||
}
|
||
|
||
void
|
||
_initialize_core()
|
||
{
|
||
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\
|
||
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);
|
||
|
||
if (getenv ("GNUTARGET"))
|
||
set_gnutarget (getenv ("GNUTARGET"));
|
||
else
|
||
set_gnutarget ("auto");
|
||
}
|