1 /* Core dump and executable file functions below target vector, 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 */
33 core_files_info
PARAMS ((struct target_ops
*));
37 solib_add_stub
PARAMS ((char *));
41 core_close
PARAMS ((int));
44 get_core_registers
PARAMS ((int));
46 /* Discard all vestiges of any previous core file
47 and mark data and stack spaces as empty. */
54 inferior_pid
= 0; /* Avoid confusion from thread stuff */
57 free (bfd_get_filename (core_bfd
));
63 if (core_ops
.to_sections
) {
64 free ((PTR
)core_ops
.to_sections
);
65 core_ops
.to_sections
= NULL
;
66 core_ops
.to_sections_end
= NULL
;
72 /* Stub function for catch_errors around shared library hacking. */
75 solib_add_stub (from_tty
)
78 SOLIB_ADD (NULL
, (int)from_tty
, &core_ops
);
81 #endif /* SOLIB_ADD */
83 /* Look for sections whose names start with `.reg/' so that we can extract the
84 list of threads in a core file. */
87 add_to_thread_list (abfd
, asect
, reg_sect_arg
)
93 asection
*reg_sect
= (asection
*) reg_sect_arg
;
95 if (strncmp (bfd_section_name (abfd
, asect
), ".reg/", 5) != 0)
98 thread_id
= atoi (bfd_section_name (abfd
, asect
) + 5);
100 add_thread (thread_id
);
102 /* Warning, Will Robinson, looking at BFD private data! */
104 if (asect
->filepos
== reg_sect
->filepos
) /* Did we find .reg? */
105 inferior_pid
= thread_id
; /* Yes, make it current */
108 /* This routine opens and sets up the core file bfd */
111 core_open (filename
, from_tty
)
117 struct cleanup
*old_chain
;
123 target_preopen (from_tty
);
127 "No core file specified. (Use `detach' to stop debugging a core file.)"
128 : "No core file specified.");
131 filename
= tilde_expand (filename
);
132 if (filename
[0] != '/') {
133 temp
= concat (current_directory
, "/", filename
, NULL
);
138 old_chain
= make_cleanup (free
, filename
);
140 scratch_chan
= open (filename
, write_files
? O_RDWR
: O_RDONLY
, 0);
141 if (scratch_chan
< 0)
142 perror_with_name (filename
);
144 temp_bfd
= bfd_fdopenr (filename
, gnutarget
, scratch_chan
);
145 if (temp_bfd
== NULL
)
147 perror_with_name (filename
);
150 if (!bfd_check_format (temp_bfd
, bfd_core
))
152 /* Do it after the err msg */
153 make_cleanup (bfd_close
, temp_bfd
);
154 error ("\"%s\" is not a core dump: %s", filename
, bfd_errmsg(bfd_error
));
157 /* Looks semi-reasonable. Toss the old core file and work on the new. */
159 discard_cleanups (old_chain
); /* Don't free filename any more */
160 unpush_target (&core_ops
);
162 old_chain
= make_cleanup (core_close
, core_bfd
);
166 /* Find the data section */
167 if (build_section_table (core_bfd
, &core_ops
.to_sections
,
168 &core_ops
.to_sections_end
))
169 error ("Can't find sections in `%s': %s", bfd_get_filename(core_bfd
),
170 bfd_errmsg (bfd_error
));
172 ontop
= !push_target (&core_ops
);
173 discard_cleanups (old_chain
);
175 p
= bfd_core_file_failing_command (core_bfd
);
177 printf_filtered ("Core was generated by `%s'.\n", p
);
179 siggy
= bfd_core_file_failing_signal (core_bfd
);
181 printf_filtered ("Program terminated with signal %d, %s.\n", siggy
,
182 safe_strsignal (siggy
));
184 /* Build up thread list from BFD sections. */
187 bfd_map_over_sections (core_bfd
, add_to_thread_list
,
188 bfd_get_section_by_name (core_bfd
, ".reg"));
191 /* Fetch all registers from core file */
192 target_fetch_registers (-1);
194 /* Add symbols and section mappings for any shared libraries */
196 catch_errors (solib_add_stub
, (char *)from_tty
, (char *)0,
200 /* Now, set up the frame cache, and print the top of stack */
201 set_current_frame (create_new_frame (read_fp (),
203 select_frame (get_current_frame (), 0);
204 print_stack_frame (selected_frame
, selected_frame_level
, 1);
207 "you won't be able to access this core file until you terminate\n\
208 your %s; do ``info files''", current_target
->to_longname
);
213 core_detach (args
, from_tty
)
218 error ("Too many arguments");
219 unpush_target (&core_ops
);
220 reinit_frame_cache ();
222 printf_filtered ("No core file now.\n");
225 /* Get the registers out of a core file. This is the machine-
226 independent part. Fetch_core_registers is the machine-dependent
227 part, typically implemented in the xm-file for each architecture. */
229 /* We just get all the registers, so we don't use regno. */
232 get_core_registers (regno
)
240 /* Thread support. If inferior_pid is non-zero, then we have found a core
241 file with threads (or multiple processes). In that case, we need to
242 use the appropriate register section, else we just use `.reg'. */
244 /* XXX - same thing needs to be done for floating-point (.reg2) sections. */
247 sprintf (secname
, ".reg/%d", inferior_pid
);
249 strcpy (secname
, ".reg");
251 reg_sec
= bfd_get_section_by_name (core_bfd
, secname
);
252 if (!reg_sec
) goto cant
;
253 size
= bfd_section_size (core_bfd
, reg_sec
);
254 the_regs
= alloca (size
);
255 if (bfd_get_section_contents (core_bfd
, reg_sec
, the_regs
, (file_ptr
)0, size
))
257 fetch_core_registers (the_regs
, size
, 0,
258 (unsigned) bfd_section_vma (abfd
,reg_sec
));
263 fprintf_filtered (stderr
, "Couldn't fetch registers from core file: %s\n",
264 bfd_errmsg (bfd_error
));
267 /* Now do it again for the float registers, if they exist. */
268 reg_sec
= bfd_get_section_by_name (core_bfd
, ".reg2");
270 size
= bfd_section_size (core_bfd
, reg_sec
);
271 the_regs
= alloca (size
);
272 if (bfd_get_section_contents (core_bfd
, reg_sec
, the_regs
, (file_ptr
)0,
275 fetch_core_registers (the_regs
, size
, 2,
276 (unsigned) bfd_section_vma (abfd
,reg_sec
));
280 fprintf_filtered (stderr
, "Couldn't fetch register set 2 from core file: %s\n",
281 bfd_errmsg (bfd_error
));
289 struct target_ops
*t
;
291 print_section_info (t
, core_bfd
);
294 /* If mourn is being called in all the right places, this could be say
295 `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */
298 ignore (addr
, contents
)
304 struct target_ops core_ops
= {
305 "core", "Local core dump file",
306 "Use a core file as a target. Specify the filename of the core file.",
307 core_open
, core_close
,
308 find_default_attach
, core_detach
, 0, 0, /* resume, wait */
310 0, 0, /* store_regs, prepare_to_store */
311 xfer_memory
, core_files_info
,
312 ignore
, ignore
, /* core_insert_breakpoint, core_remove_breakpoint, */
313 0, 0, 0, 0, 0, /* terminal stuff */
314 0, 0, 0, /* kill, load, lookup sym */
315 find_default_create_inferior
, 0, /* mourn_inferior */
317 0, /* notice_signals */
318 core_stratum
, 0, /* next */
319 0, 1, 1, 1, 0, /* all mem, mem, stack, regs, exec */
320 0, 0, /* section pointers */
321 OPS_MAGIC
, /* Always the last thing */
325 _initialize_corelow()
327 add_target (&core_ops
);