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- /* 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 "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. */
-
- long
- read_memory_integer (memaddr, len)
- CORE_ADDR memaddr;
- int len;
- {
- char cbuf;
- short sbuf;
- int ibuf;
- long lbuf;
-
- if (len == sizeof (char))
- {
- read_memory (memaddr, &cbuf, len);
- return cbuf;
- }
- if (len == sizeof (short))
- {
- read_memory (memaddr, (char *)&sbuf, len);
- SWAP_TARGET_AND_HOST (&sbuf, sizeof (short));
- return sbuf;
- }
- if (len == sizeof (int))
- {
- read_memory (memaddr, (char *)&ibuf, len);
- SWAP_TARGET_AND_HOST (&ibuf, sizeof (int));
- return ibuf;
- }
- if (len == sizeof (lbuf))
- {
- read_memory (memaddr, (char *)&lbuf, len);
- SWAP_TARGET_AND_HOST (&lbuf, sizeof (lbuf));
- return lbuf;
- }
- error ("Cannot handle integers of %d bytes.", len);
- return -1; /* for lint */
- }
-
- void
- _initialize_core()
- {
-
- add_com ("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.");
-
- }
-