1 /* Core dump and executable file functions above target vector, for GDB.
2 Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1996, 1997, 1998,
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 #include "gdb_string.h"
38 /* Local function declarations. */
40 extern void _initialize_core (void);
41 static void call_extra_exec_file_hooks (char *filename
);
43 /* You can have any number of hooks for `exec_file_command' command to call.
44 If there's only one hook, it is set in exec_file_display hook.
45 If there are two or more hooks, they are set in exec_file_extra_hooks[],
46 and exec_file_display_hook is set to a function that calls all of them.
47 This extra complexity is needed to preserve compatibility with
48 old code that assumed that only one hook could be set, and which called
49 exec_file_display_hook directly. */
51 typedef void (*hook_type
) (char *);
53 hook_type exec_file_display_hook
; /* the original hook */
54 static hook_type
*exec_file_extra_hooks
; /* array of additional hooks */
55 static int exec_file_hook_count
= 0; /* size of array */
57 /* Binary file diddling handle for the core file. */
62 /* Backward compatability with old way of specifying core files. */
65 core_file_command (char *filename
, int from_tty
)
69 dont_repeat (); /* Either way, seems bogus. */
71 t
= find_core_target ();
73 error ("GDB can't read core files on this machine.");
76 (t
->to_detach
) (filename
, from_tty
);
78 (t
->to_open
) (filename
, from_tty
);
82 /* If there are two or more functions that wish to hook into exec_file_command,
83 * this function will call all of the hook functions. */
86 call_extra_exec_file_hooks (char *filename
)
90 for (i
= 0; i
< exec_file_hook_count
; i
++)
91 (*exec_file_extra_hooks
[i
]) (filename
);
94 /* Call this to specify the hook for exec_file_command to call back.
95 This is called from the x-window display code. */
98 specify_exec_file_hook (void (*hook
) (char *))
100 hook_type
*new_array
;
102 if (exec_file_display_hook
!= NULL
)
104 /* There's already a hook installed. Arrange to have both it
105 * and the subsequent hooks called. */
106 if (exec_file_hook_count
== 0)
108 /* If this is the first extra hook, initialize the hook array. */
109 exec_file_extra_hooks
= (hook_type
*) xmalloc (sizeof (hook_type
));
110 exec_file_extra_hooks
[0] = exec_file_display_hook
;
111 exec_file_display_hook
= call_extra_exec_file_hooks
;
112 exec_file_hook_count
= 1;
115 /* Grow the hook array by one and add the new hook to the end.
116 Yes, it's inefficient to grow it by one each time but since
117 this is hardly ever called it's not a big deal. */
118 exec_file_hook_count
++;
120 (hook_type
*) xrealloc (exec_file_extra_hooks
,
121 exec_file_hook_count
* sizeof (hook_type
));
122 exec_file_extra_hooks
= new_array
;
123 exec_file_extra_hooks
[exec_file_hook_count
- 1] = hook
;
126 exec_file_display_hook
= hook
;
129 /* The exec file must be closed before running an inferior.
130 If it is needed again after the inferior dies, it must
134 close_exec_file (void)
138 bfd_tempclose (exec_bfd
);
143 reopen_exec_file (void)
147 bfd_reopen (exec_bfd
);
154 /* Don't do anything if the current target isn't exec. */
155 if (exec_bfd
== NULL
|| strcmp (target_shortname
, "exec") != 0)
158 /* If the timestamp of the exec file has changed, reopen it. */
159 filename
= xstrdup (bfd_get_filename (exec_bfd
));
160 make_cleanup (xfree
, filename
);
161 mtime
= bfd_get_mtime (exec_bfd
);
162 res
= stat (filename
, &st
);
164 if (mtime
&& mtime
!= st
.st_mtime
)
166 exec_open (filename
, 0);
171 /* If we have both a core file and an exec file,
172 print a warning if they don't go together. */
175 validate_files (void)
177 if (exec_bfd
&& core_bfd
)
179 if (!core_file_matches_executable_p (core_bfd
, exec_bfd
))
180 warning ("core file may not match specified executable file.");
181 else if (bfd_get_mtime (exec_bfd
) > bfd_get_mtime (core_bfd
))
182 warning ("exec file is newer than core file.");
186 /* Return the name of the executable file as a string.
187 ERR nonzero means get error if there is none specified;
188 otherwise return 0 in that case. */
191 get_exec_file (int err
)
194 return bfd_get_filename (exec_bfd
);
198 error ("No executable file specified.\n\
199 Use the \"file\" or \"exec-file\" command.");
204 /* Report a memory error with error(). */
207 memory_error (int status
, CORE_ADDR memaddr
)
209 struct ui_file
*tmp_stream
= mem_fileopen ();
210 make_cleanup_ui_file_delete (tmp_stream
);
214 /* Actually, address between memaddr and memaddr + len
215 was out of bounds. */
216 fprintf_unfiltered (tmp_stream
, "Cannot access memory at address ");
217 print_address_numeric (memaddr
, 1, tmp_stream
);
221 fprintf_filtered (tmp_stream
, "Error accessing memory address ");
222 print_address_numeric (memaddr
, 1, tmp_stream
);
223 fprintf_filtered (tmp_stream
, ": %s.",
224 safe_strerror (status
));
227 error_stream (tmp_stream
);
230 /* Same as target_read_memory, but report an error if can't read. */
232 read_memory (CORE_ADDR memaddr
, char *myaddr
, int len
)
235 status
= target_read_memory (memaddr
, myaddr
, len
);
237 memory_error (status
, memaddr
);
240 /* Like target_read_memory, but slightly different parameters. */
242 dis_asm_read_memory (bfd_vma memaddr
, bfd_byte
*myaddr
, unsigned int len
,
243 disassemble_info
*info
)
245 return target_read_memory (memaddr
, (char *) myaddr
, len
);
248 /* Like memory_error with slightly different parameters. */
250 dis_asm_memory_error (int status
, bfd_vma memaddr
, disassemble_info
*info
)
252 memory_error (status
, memaddr
);
255 /* Like print_address with slightly different parameters. */
257 dis_asm_print_address (bfd_vma addr
, struct disassemble_info
*info
)
259 print_address (addr
, info
->stream
);
262 /* Same as target_write_memory, but report an error if can't write. */
264 write_memory (CORE_ADDR memaddr
, char *myaddr
, int len
)
268 status
= target_write_memory (memaddr
, myaddr
, len
);
270 memory_error (status
, memaddr
);
273 /* Read an integer from debugged memory, given address and number of bytes. */
276 read_memory_integer (CORE_ADDR memaddr
, int len
)
278 char buf
[sizeof (LONGEST
)];
280 read_memory (memaddr
, buf
, len
);
281 return extract_signed_integer (buf
, len
);
285 read_memory_unsigned_integer (CORE_ADDR memaddr
, int len
)
287 char buf
[sizeof (ULONGEST
)];
289 read_memory (memaddr
, buf
, len
);
290 return extract_unsigned_integer (buf
, len
);
294 read_memory_string (CORE_ADDR memaddr
, char *buffer
, int max_len
)
303 if (cp
- buffer
>= max_len
)
305 buffer
[max_len
- 1] = '\0';
308 cnt
= max_len
- (cp
- buffer
);
311 read_memory (memaddr
+ (int) (cp
- buffer
), cp
, cnt
);
312 for (i
= 0; i
< cnt
&& *cp
; i
++, cp
++)
322 /* Enable after 4.12. It is not tested. */
324 /* Search code. Targets can just make this their search function, or
325 if the protocol has a less general search function, they can call this
326 in the cases it can't handle. */
328 generic_search (int len
, char *data
, char *mask
, CORE_ADDR startaddr
,
329 int increment
, CORE_ADDR lorange
, CORE_ADDR hirange
,
330 CORE_ADDR
*addr_found
, char *data_found
)
333 CORE_ADDR curaddr
= startaddr
;
335 while (curaddr
>= lorange
&& curaddr
< hirange
)
337 read_memory (curaddr
, data_found
, len
);
338 for (i
= 0; i
< len
; ++i
)
339 if ((data_found
[i
] & mask
[i
]) != data
[i
])
342 *addr_found
= curaddr
;
346 curaddr
+= increment
;
348 *addr_found
= (CORE_ADDR
) 0;
353 /* The current default bfd target. Points to storage allocated for
357 /* Same thing, except it is "auto" not NULL for the default case. */
358 static char *gnutarget_string
;
360 static void set_gnutarget_command (char *, int, struct cmd_list_element
*);
363 set_gnutarget_command (char *ignore
, int from_tty
, struct cmd_list_element
*c
)
365 if (STREQ (gnutarget_string
, "auto"))
368 gnutarget
= gnutarget_string
;
371 /* Set the gnutarget. */
373 set_gnutarget (char *newtarget
)
375 if (gnutarget_string
!= NULL
)
376 xfree (gnutarget_string
);
377 gnutarget_string
= savestring (newtarget
, strlen (newtarget
));
378 set_gnutarget_command (NULL
, 0, NULL
);
382 _initialize_core (void)
384 struct cmd_list_element
*c
;
385 c
= add_cmd ("core-file", class_files
, core_file_command
,
386 "Use FILE as core dump for examining memory and registers.\n\
387 No arg means have no core file. This command has been superseded by the\n\
388 `target core' and `detach' commands.", &cmdlist
);
389 c
->completer
= filename_completer
;
391 c
= add_set_cmd ("gnutarget", class_files
, var_string_noescape
,
392 (char *) &gnutarget_string
,
393 "Set the current BFD target.\n\
394 Use `set gnutarget auto' to specify automatic detection.",
396 c
->function
.sfunc
= set_gnutarget_command
;
397 add_show_from_set (c
, &showlist
);
399 if (getenv ("GNUTARGET"))
400 set_gnutarget (getenv ("GNUTARGET"));
402 set_gnutarget ("auto");