1 /* Core dump and executable file functions above target vector, for GDB.
2 Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 #include "gdb_string.h"
26 #include "frame.h" /* required by inferior.h */
37 extern char registers[];
39 /* Local function declarations. */
41 static void call_extra_exec_file_hooks PARAMS ((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) PARAMS ((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 (filename, from_tty)
71 dont_repeat (); /* Either way, seems bogus. */
73 t = find_core_target ();
76 (t->to_detach) (filename, from_tty);
78 (t->to_open) (filename, from_tty);
80 error ("GDB can't read core files on this machine.");
84 /* If there are two or more functions that wish to hook into exec_file_command,
85 * this function will call all of the hook functions. */
88 call_extra_exec_file_hooks (filename)
93 for (i = 0; i < exec_file_hook_count; i++)
94 (*exec_file_extra_hooks[i])(filename);
97 /* Call this to specify the hook for exec_file_command to call back.
98 This is called from the x-window display code. */
101 specify_exec_file_hook (hook)
102 void (*hook) PARAMS ((char *));
104 hook_type *new_array;
106 if (exec_file_display_hook != NULL)
108 /* There's already a hook installed. Arrange to have both it
109 * and the subsequent hooks called. */
110 if (exec_file_hook_count == 0)
112 /* If this is the first extra hook, initialize the hook array. */
113 exec_file_extra_hooks = (hook_type *) xmalloc (sizeof(hook_type));
114 exec_file_extra_hooks[0] = exec_file_display_hook;
115 exec_file_display_hook = call_extra_exec_file_hooks;
116 exec_file_hook_count = 1;
119 /* Grow the hook array by one and add the new hook to the end.
120 Yes, it's inefficient to grow it by one each time but since
121 this is hardly ever called it's not a big deal. */
122 exec_file_hook_count++;
124 (hook_type *) xrealloc (exec_file_extra_hooks,
125 exec_file_hook_count * sizeof(hook_type));
126 exec_file_extra_hooks = new_array;
127 exec_file_extra_hooks[exec_file_hook_count - 1] = hook;
130 exec_file_display_hook = hook;
133 /* The exec file must be closed before running an inferior.
134 If it is needed again after the inferior dies, it must
142 bfd_tempclose (exec_bfd);
151 bfd_reopen (exec_bfd);
155 /* If we have both a core file and an exec file,
156 print a warning if they don't go together. */
161 if (exec_bfd && core_bfd)
163 if (!core_file_matches_executable_p (core_bfd, exec_bfd))
164 warning ("core file may not match specified executable file.");
165 else if (bfd_get_mtime(exec_bfd) > bfd_get_mtime(core_bfd))
166 warning ("exec file is newer than core file.");
170 /* Return the name of the executable file as a string.
171 ERR nonzero means get error if there is none specified;
172 otherwise return 0 in that case. */
178 if (exec_bfd) return bfd_get_filename(exec_bfd);
179 if (!err) return NULL;
181 error ("No executable file specified.\n\
182 Use the \"file\" or \"exec-file\" command.");
187 /* Report a memory error with error(). */
190 memory_error (status, memaddr)
196 /* Actually, address between memaddr and memaddr + len
197 was out of bounds. */
199 printf_filtered ("Cannot access memory at address ");
200 print_address_numeric (memaddr, 1, gdb_stdout);
201 printf_filtered (".\n");
202 return_to_top_level (RETURN_ERROR);
207 printf_filtered ("Error accessing memory address ");
208 print_address_numeric (memaddr, 1, gdb_stdout);
209 printf_filtered (": %s.\n",
210 safe_strerror (status));
211 return_to_top_level (RETURN_ERROR);
215 /* Same as target_read_memory, but report an error if can't read. */
217 read_memory (memaddr, myaddr, len)
223 status = target_read_memory (memaddr, myaddr, len);
225 memory_error (status, memaddr);
229 read_memory_section (memaddr, myaddr, len, bfd_section)
233 asection *bfd_section;
236 status = target_read_memory_section (memaddr, myaddr, len, bfd_section);
238 memory_error (status, memaddr);
241 /* Like target_read_memory, but slightly different parameters. */
244 dis_asm_read_memory (memaddr, myaddr, len, info)
248 disassemble_info *info;
250 return target_read_memory (memaddr, (char *) myaddr, len);
253 /* Like memory_error with slightly different parameters. */
255 dis_asm_memory_error (status, memaddr, info)
258 disassemble_info *info;
260 memory_error (status, memaddr);
263 /* Like print_address with slightly different parameters. */
265 dis_asm_print_address (addr, info)
267 struct disassemble_info *info;
269 print_address (addr, info->stream);
272 /* Same as target_write_memory, but report an error if can't write. */
274 write_memory (memaddr, myaddr, len)
281 status = target_write_memory (memaddr, myaddr, len);
283 memory_error (status, memaddr);
286 /* Read an integer from debugged memory, given address and number of bytes. */
289 read_memory_integer (memaddr, len)
293 char buf[sizeof (LONGEST)];
295 read_memory (memaddr, buf, len);
296 return extract_signed_integer (buf, len);
300 read_memory_unsigned_integer (memaddr, len)
304 char buf[sizeof (ULONGEST)];
306 read_memory (memaddr, buf, len);
307 return extract_unsigned_integer (buf, len);
311 /* Enable after 4.12. It is not tested. */
313 /* Search code. Targets can just make this their search function, or
314 if the protocol has a less general search function, they can call this
315 in the cases it can't handle. */
317 generic_search (len, data, mask, startaddr, increment, lorange, hirange
318 addr_found, data_found)
326 CORE_ADDR *addr_found;
330 CORE_ADDR curaddr = startaddr;
332 while (curaddr >= lorange && curaddr < hirange)
334 read_memory (curaddr, data_found, len);
335 for (i = 0; i < len; ++i)
336 if ((data_found[i] & mask[i]) != data[i])
339 *addr_found = curaddr;
343 curaddr += increment;
345 *addr_found = (CORE_ADDR)0;
350 /* The current default bfd target. Points to storage allocated for
354 /* Same thing, except it is "auto" not NULL for the default case. */
355 static char *gnutarget_string;
357 static void set_gnutarget_command
358 PARAMS ((char *, int, struct cmd_list_element *));
361 set_gnutarget_command (ignore, from_tty, c)
364 struct cmd_list_element *c;
366 if (STREQ (gnutarget_string, "auto"))
369 gnutarget = gnutarget_string;
372 /* Set the gnutarget. */
374 set_gnutarget (newtarget)
377 if (gnutarget_string != NULL)
378 free (gnutarget_string);
379 gnutarget_string = savestring (newtarget, strlen (newtarget));
380 set_gnutarget_command (NULL, 0, NULL);
386 struct cmd_list_element *c;
387 c = add_cmd ("core-file", class_files, core_file_command,
388 "Use FILE as core dump for examining memory and registers.\n\
389 No arg means have no core file. This command has been superseded by the\n\
390 `target core' and `detach' commands.", &cmdlist);
391 c->completer = filename_completer;
393 c = add_set_cmd ("gnutarget", class_files, var_string_noescape,
394 (char *) &gnutarget_string,
395 "Set the current BFD target.\n\
396 Use `set gnutarget auto' to specify automatic detection.",
398 c->function.sfunc = set_gnutarget_command;
399 add_show_from_set (c, &showlist);
401 if (getenv ("GNUTARGET"))
402 set_gnutarget (getenv ("GNUTARGET"));
404 set_gnutarget ("auto");