1 /* Work with core dump and executable files, for GDB.
2 Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
24 #include "frame.h" /* required by inferior.h */
34 solib_add_stub
PARAMS ((char *));
38 core_close
PARAMS ((int));
41 core_open
PARAMS ((char *, int));
44 core_detach
PARAMS ((char *, int));
47 get_core_registers
PARAMS ((int));
50 core_files_info
PARAMS ((struct target_ops
*));
53 extern char *sys_errlist
[];
54 extern char *sys_siglist
[];
56 extern char registers
[];
58 /* Hook for `exec_file_command' command to call. */
60 void (*exec_file_display_hook
) PARAMS ((char *)) = NULL
;
62 /* Binary file diddling handle for the core file. */
67 extern struct target_ops core_ops
;
70 /* Discard all vestiges of any previous core file
71 and mark data and stack spaces as empty. */
79 free (bfd_get_filename (core_bfd
));
85 if (core_ops
.to_sections
) {
86 free ((PTR
)core_ops
.to_sections
);
87 core_ops
.to_sections
= NULL
;
88 core_ops
.to_sections_end
= NULL
;
94 /* Stub function for catch_errors around shared library hacking. */
97 solib_add_stub (from_tty
)
100 SOLIB_ADD (NULL
, (int)from_tty
, &core_ops
);
103 #endif /* SOLIB_ADD */
105 /* This routine opens and sets up the core file bfd */
108 core_open (filename
, from_tty
)
114 struct cleanup
*old_chain
;
120 target_preopen (from_tty
);
124 "No core file specified. (Use `detach' to stop debugging a core file.)"
125 : "No core file specified.");
128 filename
= tilde_expand (filename
);
129 if (filename
[0] != '/') {
130 temp
= concat (current_directory
, "/", filename
, NULL
);
135 old_chain
= make_cleanup (free
, filename
);
137 scratch_chan
= open (filename
, write_files
? O_RDWR
: O_RDONLY
, 0);
138 if (scratch_chan
< 0)
139 perror_with_name (filename
);
141 temp_bfd
= bfd_fdopenr (filename
, NULL
, scratch_chan
);
142 if (temp_bfd
== NULL
)
144 perror_with_name (filename
);
147 if (!bfd_check_format (temp_bfd
, bfd_core
))
149 /* Do it after the err msg */
150 make_cleanup (bfd_close
, temp_bfd
);
151 error ("\"%s\" is not a core dump: %s", filename
, bfd_errmsg(bfd_error
));
154 /* Looks semi-reasonable. Toss the old core file and work on the new. */
156 discard_cleanups (old_chain
); /* Don't free filename any more */
157 unpush_target (&core_ops
);
159 old_chain
= make_cleanup (core_close
, core_bfd
);
163 /* Find the data section */
164 if (build_section_table (core_bfd
, &core_ops
.to_sections
,
165 &core_ops
.to_sections_end
))
166 error ("Can't find sections in `%s': %s", bfd_get_filename(core_bfd
),
167 bfd_errmsg (bfd_error
));
169 ontop
= !push_target (&core_ops
);
170 discard_cleanups (old_chain
);
172 p
= bfd_core_file_failing_command (core_bfd
);
174 printf ("Core was generated by `%s'.\n", p
);
176 siggy
= bfd_core_file_failing_signal (core_bfd
);
178 printf ("Program terminated with signal %d, %s.\n", siggy
,
179 siggy
< NSIG
? sys_siglist
[siggy
] : "(undocumented)");
182 /* Fetch all registers from core file */
183 target_fetch_registers (-1);
185 /* Add symbols and section mappings for any shared libraries */
187 (void) catch_errors (solib_add_stub
, (char *)from_tty
, (char *)0);
190 /* Now, set up the frame cache, and print the top of stack */
191 set_current_frame (create_new_frame (read_register (FP_REGNUM
),
193 select_frame (get_current_frame (), 0);
194 print_stack_frame (selected_frame
, selected_frame_level
, 1);
197 "Warning: you won't be able to access this core file until you terminate\n\
198 your %s; do ``info files''\n", current_target
->to_longname
);
203 core_detach (args
, from_tty
)
208 error ("Too many arguments");
209 unpush_target (&core_ops
);
211 printf ("No core file now.\n");
214 /* Backward compatability with old way of specifying core files. */
217 core_file_command (filename
, from_tty
)
221 dont_repeat (); /* Either way, seems bogus. */
223 core_detach (filename
, from_tty
);
225 core_open (filename
, from_tty
);
229 /* Call this to specify the hook for exec_file_command to call back.
230 This is called from the x-window display code. */
233 specify_exec_file_hook (hook
)
234 void (*hook
) PARAMS ((char *));
236 exec_file_display_hook
= hook
;
239 /* The exec file must be closed before running an inferior.
240 If it is needed again after the inferior dies, it must
248 bfd_tempclose (exec_bfd
);
257 bfd_reopen (exec_bfd
);
261 /* If we have both a core file and an exec file,
262 print a warning if they don't go together. */
267 if (exec_bfd
&& core_bfd
)
269 if (!core_file_matches_executable_p (core_bfd
, exec_bfd
))
270 printf ("Warning: core file may not match specified executable file.\n");
271 else if (bfd_get_mtime(exec_bfd
) > bfd_get_mtime(core_bfd
))
272 printf ("Warning: exec file is newer than core file.\n");
276 /* Return the name of the executable file as a string.
277 ERR nonzero means get error if there is none specified;
278 otherwise return 0 in that case. */
284 if (exec_bfd
) return bfd_get_filename(exec_bfd
);
285 if (!err
) return NULL
;
287 error ("No executable file specified.\n\
288 Use the \"file\" or \"exec-file\" command.");
294 struct target_ops
*t
;
296 print_section_info (t
, core_bfd
);
299 /* Report a memory error with error(). */
302 memory_error (status
, memaddr
)
309 /* Actually, address between memaddr and memaddr + len
310 was out of bounds. */
311 error ("Cannot access memory at address %s.", local_hex_string(memaddr
));
315 if (status
>= sys_nerr
|| status
< 0)
316 error ("Error accessing memory address %s: unknown error (%d).",
317 local_hex_string(memaddr
), status
);
319 error ("Error accessing memory address %s: %s.",
320 local_hex_string(memaddr
), sys_errlist
[status
]);
324 /* Same as target_read_memory, but report an error if can't read. */
326 read_memory (memaddr
, myaddr
, len
)
332 status
= target_read_memory (memaddr
, myaddr
, len
);
334 memory_error (status
, memaddr
);
337 /* Same as target_write_memory, but report an error if can't write. */
339 write_memory (memaddr
, myaddr
, len
)
346 status
= target_write_memory (memaddr
, myaddr
, len
);
348 memory_error (status
, memaddr
);
351 /* Read an integer from debugged memory, given address and number of bytes. */
354 read_memory_integer (memaddr
, len
)
363 if (len
== sizeof (char))
365 read_memory (memaddr
, &cbuf
, len
);
368 if (len
== sizeof (short))
370 read_memory (memaddr
, (char *)&sbuf
, len
);
371 SWAP_TARGET_AND_HOST (&sbuf
, sizeof (short));
374 if (len
== sizeof (int))
376 read_memory (memaddr
, (char *)&ibuf
, len
);
377 SWAP_TARGET_AND_HOST (&ibuf
, sizeof (int));
380 if (len
== sizeof (lbuf
))
382 read_memory (memaddr
, (char *)&lbuf
, len
);
383 SWAP_TARGET_AND_HOST (&lbuf
, sizeof (lbuf
));
386 error ("Cannot handle integers of %d bytes.", len
);
387 return -1; /* for lint */
390 /* Get the registers out of a core file. This is the machine-
391 independent part. Fetch_core_registers is the machine-dependent
392 part, typically implemented in the xm-file for each architecture. */
394 /* We just get all the registers, so we don't use regno. */
397 get_core_registers (regno
)
404 reg_sec
= bfd_get_section_by_name (core_bfd
, ".reg");
405 if (!reg_sec
) goto cant
;
406 size
= bfd_section_size (core_bfd
, reg_sec
);
407 the_regs
= alloca (size
);
408 if (bfd_get_section_contents (core_bfd
, reg_sec
, the_regs
, (file_ptr
)0, size
))
410 fetch_core_registers (the_regs
, size
, 0,
411 (unsigned) bfd_section_vma (abfd
,reg_sec
));
416 fprintf (stderr
, "Couldn't fetch registers from core file: %s\n",
417 bfd_errmsg (bfd_error
));
420 /* Now do it again for the float registers, if they exist. */
421 reg_sec
= bfd_get_section_by_name (core_bfd
, ".reg2");
423 size
= bfd_section_size (core_bfd
, reg_sec
);
424 the_regs
= alloca (size
);
425 if (bfd_get_section_contents (core_bfd
, reg_sec
, the_regs
, (file_ptr
)0,
428 fetch_core_registers (the_regs
, size
, 2,
429 (unsigned) bfd_section_vma (abfd
,reg_sec
));
433 fprintf (stderr
, "Couldn't fetch register set 2 from core file: %s\n",
434 bfd_errmsg (bfd_error
));
440 struct target_ops core_ops
= {
441 "core", "Local core dump file",
442 "Use a core file as a target. Specify the filename of the core file.",
443 core_open
, core_close
,
444 child_attach
, core_detach
, 0, 0, /* resume, wait */
446 0, 0, 0, 0, /* store_regs, prepare_to_store, conv_to, conv_from */
447 xfer_memory
, core_files_info
,
448 0, 0, /* core_insert_breakpoint, core_remove_breakpoint, */
449 0, 0, 0, 0, 0, /* terminal stuff */
450 0, 0, 0, /* kill, load, lookup sym */
451 child_create_inferior
, 0, /* mourn_inferior */
452 core_stratum
, 0, /* next */
453 0, 1, 1, 1, 0, /* all mem, mem, stack, regs, exec */
454 0, 0, /* section pointers */
455 OPS_MAGIC
, /* Always the last thing */
462 add_com ("core-file", class_files
, core_file_command
,
463 "Use FILE as core dump for examining memory and registers.\n\
464 No arg means have no core file. This command has been superseded by the\n\
465 `target core' and `detach' commands.");
466 add_target (&core_ops
);