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- /* Core dump and executable file functions above target vector, for GDB.
- Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994
- 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 <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 "gdbcmd.h"
- #include "bfd.h"
- #include "target.h"
- #include "gdbcore.h"
- #include "dis-asm.h"
- #include "language.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_begin ();
- printf_filtered ("Cannot access memory at address ");
- print_address_numeric (memaddr, 1, gdb_stdout);
- printf_filtered (".\n");
- return_to_top_level (RETURN_ERROR);
- }
- else
- {
- error_begin ();
- printf_filtered ("Error accessing memory address ");
- print_address_numeric (memaddr, 1, gdb_stdout);
- printf_filtered (": %s.\n",
- safe_strerror (status));
- return_to_top_level (RETURN_ERROR);
- }
- }
-
- /* 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;
- {
- if (dis_asm_read_memory_hook)
- return dis_asm_read_memory_hook (memaddr, myaddr, len, 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);
- }
-
- #if 0
- /* Enable after 4.12. It is not tested. */
-
- /* 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. */
- void
- generic_search (len, data, mask, startaddr, increment, lorange, hirange
- addr_found, data_found)
- int len;
- char *data;
- char *mask;
- CORE_ADDR startaddr;
- int increment;
- CORE_ADDR lorange;
- CORE_ADDR hirange;
- CORE_ADDR *addr_found;
- char *data_found;
- {
- int i;
- CORE_ADDR curaddr = startaddr;
-
- 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;
- }
- #endif /* 0 */
-
- /* 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");
- }
-