1 /* Core dump and executable file functions below 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
26 #include "frame.h" /* required by inferior.h */
36 core_files_info
PARAMS ((struct target_ops
*));
40 solib_add_stub
PARAMS ((char *));
44 core_close
PARAMS ((int));
47 get_core_registers
PARAMS ((int));
49 /* Discard all vestiges of any previous core file
50 and mark data and stack spaces as empty. */
57 inferior_pid
= 0; /* Avoid confusion from thread stuff */
60 free (bfd_get_filename (core_bfd
));
66 if (core_ops
.to_sections
) {
67 free ((PTR
)core_ops
.to_sections
);
68 core_ops
.to_sections
= NULL
;
69 core_ops
.to_sections_end
= NULL
;
75 /* Stub function for catch_errors around shared library hacking. FROM_TTYP
76 is really an int * which points to from_tty. */
79 solib_add_stub (from_ttyp
)
82 SOLIB_ADD (NULL
, *(int *)from_ttyp
, &core_ops
);
85 #endif /* SOLIB_ADD */
87 /* Look for sections whose names start with `.reg/' so that we can extract the
88 list of threads in a core file. */
91 add_to_thread_list (abfd
, asect
, reg_sect_arg
)
97 asection
*reg_sect
= (asection
*) reg_sect_arg
;
99 if (strncmp (bfd_section_name (abfd
, asect
), ".reg/", 5) != 0)
102 thread_id
= atoi (bfd_section_name (abfd
, asect
) + 5);
104 add_thread (thread_id
);
106 /* Warning, Will Robinson, looking at BFD private data! */
108 if (asect
->filepos
== reg_sect
->filepos
) /* Did we find .reg? */
109 inferior_pid
= thread_id
; /* Yes, make it current */
112 /* This routine opens and sets up the core file bfd */
115 core_open (filename
, from_tty
)
121 struct cleanup
*old_chain
;
127 target_preopen (from_tty
);
131 "No core file specified. (Use `detach' to stop debugging a core file.)"
132 : "No core file specified.");
135 filename
= tilde_expand (filename
);
136 if (filename
[0] != '/') {
137 temp
= concat (current_directory
, "/", filename
, NULL
);
142 old_chain
= make_cleanup (free
, filename
);
144 scratch_chan
= open (filename
, write_files
? O_RDWR
: O_RDONLY
, 0);
145 if (scratch_chan
< 0)
146 perror_with_name (filename
);
148 temp_bfd
= bfd_fdopenr (filename
, gnutarget
, scratch_chan
);
149 if (temp_bfd
== NULL
)
151 perror_with_name (filename
);
154 if (!bfd_check_format (temp_bfd
, bfd_core
))
156 /* Do it after the err msg */
157 make_cleanup (bfd_close
, temp_bfd
);
158 error ("\"%s\" is not a core dump: %s", filename
, bfd_errmsg(bfd_get_error ()));
161 /* Looks semi-reasonable. Toss the old core file and work on the new. */
163 discard_cleanups (old_chain
); /* Don't free filename any more */
164 unpush_target (&core_ops
);
166 old_chain
= make_cleanup (core_close
, core_bfd
);
170 /* Find the data section */
171 if (build_section_table (core_bfd
, &core_ops
.to_sections
,
172 &core_ops
.to_sections_end
))
173 error ("Can't find sections in `%s': %s", bfd_get_filename(core_bfd
),
174 bfd_errmsg (bfd_get_error ()));
176 ontop
= !push_target (&core_ops
);
177 discard_cleanups (old_chain
);
179 p
= bfd_core_file_failing_command (core_bfd
);
181 printf_filtered ("Core was generated by `%s'.\n", p
);
183 siggy
= bfd_core_file_failing_signal (core_bfd
);
185 printf_filtered ("Program terminated with signal %d, %s.\n", siggy
,
186 safe_strsignal (siggy
));
188 /* Build up thread list from BFD sections. */
191 bfd_map_over_sections (core_bfd
, add_to_thread_list
,
192 bfd_get_section_by_name (core_bfd
, ".reg"));
195 /* Fetch all registers from core file */
196 target_fetch_registers (-1);
198 /* Add symbols and section mappings for any shared libraries */
200 catch_errors (solib_add_stub
, &from_tty
, (char *)0,
204 /* Now, set up the frame cache, and print the top of stack */
205 set_current_frame (create_new_frame (read_fp (),
207 select_frame (get_current_frame (), 0);
208 print_stack_frame (selected_frame
, selected_frame_level
, 1);
211 "you won't be able to access this core file until you terminate\n\
212 your %s; do ``info files''", current_target
->to_longname
);
217 core_detach (args
, from_tty
)
222 error ("Too many arguments");
223 unpush_target (&core_ops
);
224 reinit_frame_cache ();
226 printf_filtered ("No core file now.\n");
229 /* Get the registers out of a core file. This is the machine-
230 independent part. Fetch_core_registers is the machine-dependent
231 part, typically implemented in the xm-file for each architecture. */
233 /* We just get all the registers, so we don't use regno. */
236 get_core_registers (regno
)
244 /* Thread support. If inferior_pid is non-zero, then we have found a core
245 file with threads (or multiple processes). In that case, we need to
246 use the appropriate register section, else we just use `.reg'. */
248 /* XXX - same thing needs to be done for floating-point (.reg2) sections. */
251 sprintf (secname
, ".reg/%d", inferior_pid
);
253 strcpy (secname
, ".reg");
255 reg_sec
= bfd_get_section_by_name (core_bfd
, secname
);
256 if (!reg_sec
) goto cant
;
257 size
= bfd_section_size (core_bfd
, reg_sec
);
258 the_regs
= alloca (size
);
259 if (bfd_get_section_contents (core_bfd
, reg_sec
, the_regs
, (file_ptr
)0, size
))
261 fetch_core_registers (the_regs
, size
, 0,
262 (unsigned) bfd_section_vma (abfd
,reg_sec
));
267 fprintf_filtered (gdb_stderr
, "Couldn't fetch registers from core file: %s\n",
268 bfd_errmsg (bfd_get_error ()));
271 /* Now do it again for the float registers, if they exist. */
272 reg_sec
= bfd_get_section_by_name (core_bfd
, ".reg2");
274 size
= bfd_section_size (core_bfd
, reg_sec
);
275 the_regs
= alloca (size
);
276 if (bfd_get_section_contents (core_bfd
, reg_sec
, the_regs
, (file_ptr
)0,
279 fetch_core_registers (the_regs
, size
, 2,
280 (unsigned) bfd_section_vma (abfd
,reg_sec
));
284 fprintf_filtered (gdb_stderr
, "Couldn't fetch register set 2 from core file: %s\n",
285 bfd_errmsg (bfd_get_error ()));
293 struct target_ops
*t
;
295 print_section_info (t
, core_bfd
);
298 /* If mourn is being called in all the right places, this could be say
299 `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */
302 ignore (addr
, contents
)
309 struct target_ops core_ops
= {
310 "core", "Local core dump file",
311 "Use a core file as a target. Specify the filename of the core file.",
312 core_open
, core_close
,
313 find_default_attach
, core_detach
, 0, 0, /* resume, wait */
315 0, 0, /* store_regs, prepare_to_store */
316 xfer_memory
, core_files_info
,
317 ignore
, ignore
, /* core_insert_breakpoint, core_remove_breakpoint, */
318 0, 0, 0, 0, 0, /* terminal stuff */
319 0, 0, 0, /* kill, load, lookup sym */
320 find_default_create_inferior
, 0, /* mourn_inferior */
322 0, /* notice_signals */
323 core_stratum
, 0, /* next */
324 0, 1, 1, 1, 0, /* all mem, mem, stack, regs, exec */
325 0, 0, /* section pointers */
326 OPS_MAGIC
, /* Always the last thing */
330 _initialize_corelow()
332 add_target (&core_ops
);