| /* Core dump and executable file functions above target vector, for GDB. |
| Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1996, 1997, 1998, |
| 1999, 2000, 2001 |
| 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., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "gdb_string.h" |
| #include <errno.h> |
| #include <signal.h> |
| #include <fcntl.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 "gdb_stat.h" |
| #include "completer.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. */ |
| |
| 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 */ |
| |
| /* 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 (char *filename, int from_tty) |
| { |
| struct target_ops *t; |
| |
| dont_repeat (); /* Either way, seems bogus. */ |
| |
| t = find_core_target (); |
| if (t == NULL) |
| error ("GDB can't read core files on this machine."); |
| |
| if (!filename) |
| (t->to_detach) (filename, from_tty); |
| else |
| (t->to_open) (filename, from_tty); |
| } |
| |
| |
| /* 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) |
| { |
| int i; |
| |
| for (i = 0; i < exec_file_hook_count; i++) |
| (*exec_file_extra_hooks[i]) (filename); |
| } |
| |
| /* 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 (void (*hook) (char *)) |
| { |
| hook_type *new_array; |
| |
| if (exec_file_display_hook != NULL) |
| { |
| /* There's already a hook installed. Arrange to have both it |
| * 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; |
| exec_file_hook_count = 1; |
| } |
| |
| /* Grow the hook array by one and add the new hook to the end. |
| 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)); |
| 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 |
| } |
| |
| 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; |
| |
| /* Don't do anything if the current target isn't exec. */ |
| if (exec_bfd == NULL || strcmp (target_shortname, "exec") != 0) |
| return; |
| |
| /* If the timestamp of the exec file has changed, reopen it. */ |
| filename = xstrdup (bfd_get_filename (exec_bfd)); |
| make_cleanup (xfree, filename); |
| mtime = bfd_get_mtime (exec_bfd); |
| res = stat (filename, &st); |
| |
| if (mtime && mtime != st.st_mtime) |
| { |
| exec_open (filename, 0); |
| } |
| #endif |
| } |
| |
| /* If we have both a core file and an exec file, |
| print a warning if they don't go together. */ |
| |
| void |
| validate_files (void) |
| { |
| 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 (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 (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); |
| } |
| 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); |
| } |
| |
| /* Same as target_read_memory, but report an error if can't read. */ |
| void |
| read_memory (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 (bfd_vma memaddr, bfd_byte *myaddr, unsigned 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 (int status, bfd_vma memaddr, disassemble_info *info) |
| { |
| memory_error (status, memaddr); |
| } |
| |
| /* Like print_address with slightly different parameters. */ |
| void |
| dis_asm_print_address (bfd_vma addr, struct disassemble_info *info) |
| { |
| print_address (addr, info->stream); |
| } |
| |
| /* Read an integer from debugged memory, given address and number of bytes. */ |
| |
| struct captured_read_memory_integer_arguments |
| { |
| CORE_ADDR memaddr; |
| int len; |
| LONGEST result; |
| }; |
| |
| 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; |
| |
| args->result = read_memory_integer (memaddr, len); |
| |
| return 0; |
| } |
| |
| int |
| safe_read_memory_integer (CORE_ADDR memaddr, int len, LONGEST *return_value) |
| { |
| int status; |
| struct captured_read_memory_integer_arguments args; |
| args.memaddr = memaddr; |
| args.len = len; |
| |
| status = catch_errors (do_captured_read_memory_integer, &args, |
| "", RETURN_MASK_ALL); |
| if (!status) |
| *return_value = args.result; |
| |
| return status; |
| } |
| |
| LONGEST |
| read_memory_integer (CORE_ADDR memaddr, int len) |
| { |
| char buf[sizeof (LONGEST)]; |
| |
| read_memory (memaddr, buf, len); |
| return extract_signed_integer (buf, len); |
| } |
| |
| ULONGEST |
| read_memory_unsigned_integer (CORE_ADDR memaddr, int len) |
| { |
| char buf[sizeof (ULONGEST)]; |
| |
| read_memory (memaddr, buf, len); |
| return extract_unsigned_integer (buf, len); |
| } |
| |
| void |
| read_memory_string (CORE_ADDR memaddr, char *buffer, int max_len) |
| { |
| register char *cp; |
| register int i; |
| int cnt; |
| |
| cp = buffer; |
| while (1) |
| { |
| if (cp - buffer >= max_len) |
| { |
| buffer[max_len - 1] = '\0'; |
| break; |
| } |
| cnt = max_len - (cp - buffer); |
| if (cnt > 8) |
| cnt = 8; |
| read_memory (memaddr + (int) (cp - buffer), cp, cnt); |
| for (i = 0; i < cnt && *cp; i++, cp++) |
| ; /* null body */ |
| |
| if (i < cnt && !*cp) |
| break; |
| } |
| } |
| |
| /* Same as target_write_memory, but report an error if can't write. */ |
| void |
| write_memory (CORE_ADDR memaddr, char *myaddr, int len) |
| { |
| int status; |
| |
| status = target_write_memory (memaddr, myaddr, len); |
| if (status != 0) |
| memory_error (status, memaddr); |
| } |
| |
| /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer. */ |
| void |
| write_memory_unsigned_integer (CORE_ADDR addr, int len, ULONGEST value) |
| { |
| char *buf = alloca (len); |
| store_unsigned_integer (buf, len, 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, LONGEST value) |
| { |
| char *buf = alloca (len); |
| store_signed_integer (buf, len, value); |
| write_memory (addr, 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 (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 (char *, int, struct cmd_list_element *); |
| |
| static void |
| set_gnutarget_command (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 (char *newtarget) |
| { |
| if (gnutarget_string != NULL) |
| xfree (gnutarget_string); |
| gnutarget_string = savestring (newtarget, strlen (newtarget)); |
| set_gnutarget_command (NULL, 0, NULL); |
| } |
| |
| void |
| _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\ |
| 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); |
| set_cmd_sfunc (c, set_gnutarget_command); |
| add_show_from_set (c, &showlist); |
| |
| if (getenv ("GNUTARGET")) |
| set_gnutarget (getenv ("GNUTARGET")); |
| else |
| set_gnutarget ("auto"); |
| } |