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 */
34 core_files_info
PARAMS ((struct target_ops
*));
38 solib_add_stub
PARAMS ((char *));
42 core_close
PARAMS ((int));
45 get_core_registers
PARAMS ((int));
47 /* Discard all vestiges of any previous core file
48 and mark data and stack spaces as empty. */
55 inferior_pid
= 0; /* Avoid confusion from thread stuff */
58 free (bfd_get_filename (core_bfd
));
64 if (core_ops
.to_sections
) {
65 free ((PTR
)core_ops
.to_sections
);
66 core_ops
.to_sections
= NULL
;
67 core_ops
.to_sections_end
= NULL
;
73 /* Stub function for catch_errors around shared library hacking. FROM_TTYP
74 is really an int * which points to from_tty. */
77 solib_add_stub (from_ttyp
)
80 SOLIB_ADD (NULL
, *(int *)from_ttyp
, &core_ops
);
83 #endif /* SOLIB_ADD */
85 /* Look for sections whose names start with `.reg/' so that we can extract the
86 list of threads in a core file. */
89 add_to_thread_list (abfd
, asect
, reg_sect_arg
)
95 asection
*reg_sect
= (asection
*) reg_sect_arg
;
97 if (strncmp (bfd_section_name (abfd
, asect
), ".reg/", 5) != 0)
100 thread_id
= atoi (bfd_section_name (abfd
, asect
) + 5);
102 add_thread (thread_id
);
104 /* Warning, Will Robinson, looking at BFD private data! */
106 if (asect
->filepos
== reg_sect
->filepos
) /* Did we find .reg? */
107 inferior_pid
= thread_id
; /* Yes, make it current */
110 /* This routine opens and sets up the core file bfd */
113 core_open (filename
, from_tty
)
119 struct cleanup
*old_chain
;
125 target_preopen (from_tty
);
129 "No core file specified. (Use `detach' to stop debugging a core file.)"
130 : "No core file specified.");
133 filename
= tilde_expand (filename
);
134 if (filename
[0] != '/') {
135 temp
= concat (current_directory
, "/", filename
, NULL
);
140 old_chain
= make_cleanup (free
, filename
);
142 scratch_chan
= open (filename
, write_files
? O_RDWR
: O_RDONLY
, 0);
143 if (scratch_chan
< 0)
144 perror_with_name (filename
);
146 temp_bfd
= bfd_fdopenr (filename
, gnutarget
, scratch_chan
);
147 if (temp_bfd
== NULL
)
149 perror_with_name (filename
);
152 if (!bfd_check_format (temp_bfd
, bfd_core
))
154 /* Do it after the err msg */
155 make_cleanup (bfd_close
, temp_bfd
);
156 error ("\"%s\" is not a core dump: %s", filename
, bfd_errmsg(bfd_error
));
159 /* Looks semi-reasonable. Toss the old core file and work on the new. */
161 discard_cleanups (old_chain
); /* Don't free filename any more */
162 unpush_target (&core_ops
);
164 old_chain
= make_cleanup (core_close
, core_bfd
);
168 /* Find the data section */
169 if (build_section_table (core_bfd
, &core_ops
.to_sections
,
170 &core_ops
.to_sections_end
))
171 error ("Can't find sections in `%s': %s", bfd_get_filename(core_bfd
),
172 bfd_errmsg (bfd_error
));
174 ontop
= !push_target (&core_ops
);
175 discard_cleanups (old_chain
);
177 p
= bfd_core_file_failing_command (core_bfd
);
179 printf_filtered ("Core was generated by `%s'.\n", p
);
181 siggy
= bfd_core_file_failing_signal (core_bfd
);
183 printf_filtered ("Program terminated with signal %d, %s.\n", siggy
,
184 safe_strsignal (siggy
));
186 /* Build up thread list from BFD sections. */
189 bfd_map_over_sections (core_bfd
, add_to_thread_list
,
190 bfd_get_section_by_name (core_bfd
, ".reg"));
193 /* Fetch all registers from core file */
194 target_fetch_registers (-1);
196 /* Add symbols and section mappings for any shared libraries */
198 catch_errors (solib_add_stub
, &from_tty
, (char *)0,
202 /* Now, set up the frame cache, and print the top of stack */
203 set_current_frame (create_new_frame (read_fp (),
205 select_frame (get_current_frame (), 0);
206 print_stack_frame (selected_frame
, selected_frame_level
, 1);
209 "you won't be able to access this core file until you terminate\n\
210 your %s; do ``info files''", current_target
->to_longname
);
215 core_detach (args
, from_tty
)
220 error ("Too many arguments");
221 unpush_target (&core_ops
);
222 reinit_frame_cache ();
224 printf_filtered ("No core file now.\n");
227 /* Get the registers out of a core file. This is the machine-
228 independent part. Fetch_core_registers is the machine-dependent
229 part, typically implemented in the xm-file for each architecture. */
231 /* We just get all the registers, so we don't use regno. */
234 get_core_registers (regno
)
242 /* Thread support. If inferior_pid is non-zero, then we have found a core
243 file with threads (or multiple processes). In that case, we need to
244 use the appropriate register section, else we just use `.reg'. */
246 /* XXX - same thing needs to be done for floating-point (.reg2) sections. */
249 sprintf (secname
, ".reg/%d", inferior_pid
);
251 strcpy (secname
, ".reg");
253 reg_sec
= bfd_get_section_by_name (core_bfd
, secname
);
254 if (!reg_sec
) goto cant
;
255 size
= bfd_section_size (core_bfd
, reg_sec
);
256 the_regs
= alloca (size
);
257 if (bfd_get_section_contents (core_bfd
, reg_sec
, the_regs
, (file_ptr
)0, size
))
259 fetch_core_registers (the_regs
, size
, 0,
260 (unsigned) bfd_section_vma (abfd
,reg_sec
));
265 fprintf_filtered (gdb_stderr
, "Couldn't fetch registers from core file: %s\n",
266 bfd_errmsg (bfd_error
));
269 /* Now do it again for the float registers, if they exist. */
270 reg_sec
= bfd_get_section_by_name (core_bfd
, ".reg2");
272 size
= bfd_section_size (core_bfd
, reg_sec
);
273 the_regs
= alloca (size
);
274 if (bfd_get_section_contents (core_bfd
, reg_sec
, the_regs
, (file_ptr
)0,
277 fetch_core_registers (the_regs
, size
, 2,
278 (unsigned) bfd_section_vma (abfd
,reg_sec
));
282 fprintf_filtered (gdb_stderr
, "Couldn't fetch register set 2 from core file: %s\n",
283 bfd_errmsg (bfd_error
));
291 struct target_ops
*t
;
293 print_section_info (t
, core_bfd
);
296 /* If mourn is being called in all the right places, this could be say
297 `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */
300 ignore (addr
, contents
)
307 struct target_ops core_ops
= {
308 "core", "Local core dump file",
309 "Use a core file as a target. Specify the filename of the core file.",
310 core_open
, core_close
,
311 find_default_attach
, core_detach
, 0, 0, /* resume, wait */
313 0, 0, /* store_regs, prepare_to_store */
314 xfer_memory
, core_files_info
,
315 ignore
, ignore
, /* core_insert_breakpoint, core_remove_breakpoint, */
316 0, 0, 0, 0, 0, /* terminal stuff */
317 0, 0, 0, /* kill, load, lookup sym */
318 find_default_create_inferior
, 0, /* mourn_inferior */
320 0, /* notice_signals */
321 core_stratum
, 0, /* next */
322 0, 1, 1, 1, 0, /* all mem, mem, stack, regs, exec */
323 0, 0, /* section pointers */
324 OPS_MAGIC
, /* Always the last thing */
328 _initialize_corelow()
330 add_target (&core_ops
);