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 */
35 static void core_files_info
PARAMS ((struct target_ops
*));
38 static int solib_add_stub
PARAMS ((char *));
41 static void core_close
PARAMS ((int));
43 static void get_core_registers
PARAMS ((int));
45 /* Discard all vestiges of any previous core file and mark data and stack
55 inferior_pid
= 0; /* Avoid confusion from thread stuff */
59 name
= bfd_get_filename (core_bfd
);
60 if (!bfd_close (core_bfd
))
61 warning ("cannot close \"%s\": %s",
62 name
, bfd_errmsg (bfd_get_error ()));
68 if (core_ops
.to_sections
)
70 free ((PTR
)core_ops
.to_sections
);
71 core_ops
.to_sections
= NULL
;
72 core_ops
.to_sections_end
= NULL
;
78 /* Stub function for catch_errors around shared library hacking. FROM_TTYP
79 is really an int * which points to from_tty. */
82 solib_add_stub (from_ttyp
)
85 SOLIB_ADD (NULL
, *(int *)from_ttyp
, ¤t_target
);
88 #endif /* SOLIB_ADD */
90 /* Look for sections whose names start with `.reg/' so that we can extract the
91 list of threads in a core file. */
94 add_to_thread_list (abfd
, asect
, reg_sect_arg
)
100 asection
*reg_sect
= (asection
*) reg_sect_arg
;
102 if (strncmp (bfd_section_name (abfd
, asect
), ".reg/", 5) != 0)
105 thread_id
= atoi (bfd_section_name (abfd
, asect
) + 5);
107 add_thread (thread_id
);
109 /* Warning, Will Robinson, looking at BFD private data! */
111 if (asect
->filepos
== reg_sect
->filepos
) /* Did we find .reg? */
112 inferior_pid
= thread_id
; /* Yes, make it current */
115 /* This routine opens and sets up the core file bfd. */
118 core_open (filename
, from_tty
)
124 struct cleanup
*old_chain
;
130 target_preopen (from_tty
);
134 "No core file specified. (Use `detach' to stop debugging a core file.)"
135 : "No core file specified.");
138 filename
= tilde_expand (filename
);
139 if (filename
[0] != '/')
141 temp
= concat (current_directory
, "/", filename
, NULL
);
146 old_chain
= make_cleanup (free
, filename
);
148 scratch_chan
= open (filename
, write_files
? O_RDWR
: O_RDONLY
, 0);
149 if (scratch_chan
< 0)
150 perror_with_name (filename
);
152 temp_bfd
= bfd_fdopenr (filename
, gnutarget
, scratch_chan
);
153 if (temp_bfd
== NULL
)
154 perror_with_name (filename
);
156 if (!bfd_check_format (temp_bfd
, bfd_core
))
158 /* Do it after the err msg */
159 /* FIXME: should be checking for errors from bfd_close (for one thing,
160 on error it does not free all the storage associated with the
162 make_cleanup (bfd_close
, temp_bfd
);
163 error ("\"%s\" is not a core dump: %s",
164 filename
, bfd_errmsg (bfd_get_error ()));
167 /* Looks semi-reasonable. Toss the old core file and work on the new. */
169 discard_cleanups (old_chain
); /* Don't free filename any more */
170 unpush_target (&core_ops
);
172 old_chain
= make_cleanup (core_close
, core_bfd
);
176 /* Find the data section */
177 if (build_section_table (core_bfd
, &core_ops
.to_sections
,
178 &core_ops
.to_sections_end
))
179 error ("\"%s\": Can't find sections: %s",
180 bfd_get_filename (core_bfd
), bfd_errmsg (bfd_get_error ()));
182 ontop
= !push_target (&core_ops
);
183 discard_cleanups (old_chain
);
185 p
= bfd_core_file_failing_command (core_bfd
);
187 printf_filtered ("Core was generated by `%s'.\n", p
);
189 siggy
= bfd_core_file_failing_signal (core_bfd
);
191 printf_filtered ("Program terminated with signal %d, %s.\n", siggy
,
192 safe_strsignal (siggy
));
194 /* Build up thread list from BFD sections. */
197 bfd_map_over_sections (core_bfd
, add_to_thread_list
,
198 bfd_get_section_by_name (core_bfd
, ".reg"));
202 /* Fetch all registers from core file. */
203 target_fetch_registers (-1);
205 /* Add symbols and section mappings for any shared libraries. */
207 catch_errors (solib_add_stub
, &from_tty
, (char *)0,
210 /* solib_add_stub usually modifies current_target.to_sections, which
211 has to be reflected in core_ops to enable proper freeing of
212 the to_sections vector in core_close and correct section
213 mapping in xfer_memory and core_files_info. */
214 core_ops
.to_sections
= current_target
.to_sections
;
215 core_ops
.to_sections_end
= current_target
.to_sections_end
;
218 /* Now, set up the frame cache, and print the top of stack. */
219 flush_cached_frames ();
220 select_frame (get_current_frame (), 0);
221 print_stack_frame (selected_frame
, selected_frame_level
, 1);
226 "you won't be able to access this core file until you terminate\n\
227 your %s; do ``info files''", target_longname
);
232 core_detach (args
, from_tty
)
237 error ("Too many arguments");
238 unpush_target (&core_ops
);
239 reinit_frame_cache ();
241 printf_filtered ("No core file now.\n");
244 /* Get the registers out of a core file. This is the machine-
245 independent part. Fetch_core_registers is the machine-dependent
246 part, typically implemented in the xm-file for each architecture. */
248 /* We just get all the registers, so we don't use regno. */
252 get_core_registers (regno
)
260 /* Thread support. If inferior_pid is non-zero, then we have found a core
261 file with threads (or multiple processes). In that case, we need to
262 use the appropriate register section, else we just use `.reg'. */
264 /* XXX - same thing needs to be done for floating-point (.reg2) sections. */
267 sprintf (secname
, ".reg/%d", inferior_pid
);
269 strcpy (secname
, ".reg");
271 reg_sec
= bfd_get_section_by_name (core_bfd
, secname
);
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, size
))
278 fetch_core_registers (the_regs
, size
, 0,
279 (unsigned) bfd_section_vma (abfd
,reg_sec
));
284 fprintf_filtered (gdb_stderr
,
285 "Couldn't fetch registers from core file: %s\n",
286 bfd_errmsg (bfd_get_error ()));
289 /* Now do it again for the float registers, if they exist. */
290 reg_sec
= bfd_get_section_by_name (core_bfd
, ".reg2");
293 size
= bfd_section_size (core_bfd
, reg_sec
);
294 the_regs
= alloca (size
);
295 if (bfd_get_section_contents (core_bfd
, reg_sec
, the_regs
, (file_ptr
)0,
298 fetch_core_registers (the_regs
, size
, 2,
299 (unsigned) bfd_section_vma (abfd
,reg_sec
));
303 fprintf_filtered (gdb_stderr
,
304 "Couldn't fetch register set 2 from core file: %s\n",
305 bfd_errmsg (bfd_get_error ()));
308 registers_fetched ();
313 struct target_ops
*t
;
315 print_section_info (t
, core_bfd
);
318 /* If mourn is being called in all the right places, this could be say
319 `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */
322 ignore (addr
, contents
)
329 struct target_ops core_ops
= {
330 "core", /* to_shortname */
331 "Local core dump file", /* to_longname */
332 "Use a core file as a target. Specify the filename of the core file.", /* to_doc */
333 core_open
, /* to_open */
334 core_close
, /* to_close */
335 find_default_attach
, /* to_attach */
336 core_detach
, /* to_detach */
339 get_core_registers
, /* to_fetch_registers */
340 0, /* to_store_registers */
341 0, /* to_prepare_to_store */
342 xfer_memory
, /* to_xfer_memory */
343 core_files_info
, /* to_files_info */
344 ignore
, /* to_insert_breakpoint */
345 ignore
, /* to_remove_breakpoint */
346 0, /* to_terminal_init */
347 0, /* to_terminal_inferior */
348 0, /* to_terminal_ours_for_output */
349 0, /* to_terminal_ours */
350 0, /* to_terminal_info */
353 0, /* to_lookup_symbol */
354 find_default_create_inferior
, /* to_create_inferior */
355 0, /* to_mourn_inferior */
357 0, /* to_notice_signals */
359 core_stratum
, /* to_stratum */
361 0, /* to_has_all_memory */
362 1, /* to_has_memory */
363 1, /* to_has_stack */
364 1, /* to_has_registers */
365 0, /* to_has_execution */
367 0, /* to_sections_end */
368 OPS_MAGIC
, /* to_magic */
372 _initialize_corelow()
374 add_target (&core_ops
);