Commit | Line | Data |
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be4d1333 | 1 | /* Generate a core file for the inferior process. |
1bac305b | 2 | |
618f726f | 3 | Copyright (C) 2001-2016 Free Software Foundation, Inc. |
be4d1333 MS |
4 | |
5 | This file is part of GDB. | |
6 | ||
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
be4d1333 MS |
10 | (at your option) any later version. |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
be4d1333 MS |
19 | |
20 | #include "defs.h" | |
d3420b2f MK |
21 | #include "elf-bfd.h" |
22 | #include "infcall.h" | |
be4d1333 MS |
23 | #include "inferior.h" |
24 | #include "gdbcore.h" | |
be4d1333 | 25 | #include "objfiles.h" |
de18c1d8 | 26 | #include "solib.h" |
d3420b2f | 27 | #include "symfile.h" |
0156b218 MS |
28 | #include "arch-utils.h" |
29 | #include "completer.h" | |
30 | #include "gcore.h" | |
d3420b2f | 31 | #include "cli/cli-decode.h" |
0156b218 MS |
32 | #include <fcntl.h> |
33 | #include "regcache.h" | |
34 | #include "regset.h" | |
cbb099e8 | 35 | #include "gdb_bfd.h" |
47ecca85 | 36 | #include "readline/tilde.h" |
325fac50 | 37 | #include <algorithm> |
be4d1333 | 38 | |
804e0f53 DJ |
39 | /* The largest amount of memory to read from the target at once. We |
40 | must throttle it to limit the amount of memory used by GDB during | |
41 | generate-core-file for programs with large resident data. */ | |
42 | #define MAX_COPY_BYTES (1024 * 1024) | |
43 | ||
a78c2d62 | 44 | static const char *default_gcore_target (void); |
d3420b2f MK |
45 | static enum bfd_architecture default_gcore_arch (void); |
46 | static unsigned long default_gcore_mach (void); | |
47 | static int gcore_memory_sections (bfd *); | |
48 | ||
0156b218 MS |
49 | /* create_gcore_bfd -- helper for gcore_command (exported). |
50 | Open a new bfd core file for output, and return the handle. */ | |
be4d1333 | 51 | |
0156b218 | 52 | bfd * |
85e1311a | 53 | create_gcore_bfd (const char *filename) |
be4d1333 | 54 | { |
1e351ed1 | 55 | bfd *obfd = gdb_bfd_openw (filename, default_gcore_target ()); |
d8734c88 | 56 | |
d3420b2f | 57 | if (!obfd) |
0156b218 | 58 | error (_("Failed to open '%s' for output."), filename); |
be4d1333 MS |
59 | bfd_set_format (obfd, bfd_core); |
60 | bfd_set_arch_mach (obfd, default_gcore_arch (), default_gcore_mach ()); | |
0156b218 MS |
61 | return obfd; |
62 | } | |
63 | ||
5fff78c4 | 64 | /* write_gcore_file_1 -- do the actual work of write_gcore_file. */ |
0156b218 | 65 | |
5fff78c4 MM |
66 | static void |
67 | write_gcore_file_1 (bfd *obfd) | |
0156b218 | 68 | { |
1d1f1ccb | 69 | struct cleanup *cleanup; |
0156b218 MS |
70 | void *note_data = NULL; |
71 | int note_size = 0; | |
72 | asection *note_sec = NULL; | |
be4d1333 | 73 | |
d3420b2f | 74 | /* An external target method must build the notes section. */ |
6432734d UW |
75 | /* FIXME: uweigand/2011-10-06: All architectures that support core file |
76 | generation should be converted to gdbarch_make_corefile_notes; at that | |
77 | point, the target vector method can be removed. */ | |
f5656ead | 78 | if (!gdbarch_make_corefile_notes_p (target_gdbarch ())) |
6432734d UW |
79 | note_data = target_make_corefile_notes (obfd, ¬e_size); |
80 | else | |
f5656ead | 81 | note_data = gdbarch_make_corefile_notes (target_gdbarch (), obfd, ¬e_size); |
6432734d | 82 | |
1d1f1ccb MM |
83 | cleanup = make_cleanup (xfree, note_data); |
84 | ||
6432734d UW |
85 | if (note_data == NULL || note_size == 0) |
86 | error (_("Target does not support core file generation.")); | |
be4d1333 | 87 | |
d3420b2f | 88 | /* Create the note section. */ |
6432734d UW |
89 | note_sec = bfd_make_section_anyway_with_flags (obfd, "note0", |
90 | SEC_HAS_CONTENTS | |
91 | | SEC_READONLY | |
92 | | SEC_ALLOC); | |
93 | if (note_sec == NULL) | |
94 | error (_("Failed to create 'note' section for corefile: %s"), | |
95 | bfd_errmsg (bfd_get_error ())); | |
96 | ||
97 | bfd_set_section_vma (obfd, note_sec, 0); | |
98 | bfd_set_section_alignment (obfd, note_sec, 0); | |
99 | bfd_set_section_size (obfd, note_sec, note_size); | |
be4d1333 | 100 | |
d3420b2f | 101 | /* Now create the memory/load sections. */ |
be4d1333 | 102 | if (gcore_memory_sections (obfd) == 0) |
8a3fe4f8 | 103 | error (_("gcore: failed to get corefile memory sections from target.")); |
be4d1333 | 104 | |
d3420b2f | 105 | /* Write out the contents of the note section. */ |
6432734d UW |
106 | if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size)) |
107 | warning (_("writing note section (%s)"), bfd_errmsg (bfd_get_error ())); | |
1d1f1ccb MM |
108 | |
109 | do_cleanups (cleanup); | |
0156b218 MS |
110 | } |
111 | ||
5fff78c4 MM |
112 | /* write_gcore_file -- helper for gcore_command (exported). |
113 | Compose and write the corefile data to the core file. */ | |
114 | ||
115 | void | |
116 | write_gcore_file (bfd *obfd) | |
117 | { | |
492d29ea | 118 | struct gdb_exception except = exception_none; |
5fff78c4 MM |
119 | |
120 | target_prepare_to_generate_core (); | |
121 | ||
492d29ea PA |
122 | TRY |
123 | { | |
124 | write_gcore_file_1 (obfd); | |
125 | } | |
126 | CATCH (e, RETURN_MASK_ALL) | |
127 | { | |
128 | except = e; | |
129 | } | |
130 | END_CATCH | |
5fff78c4 MM |
131 | |
132 | target_done_generating_core (); | |
133 | ||
134 | if (except.reason < 0) | |
135 | throw_exception (except); | |
136 | } | |
137 | ||
14d1346b DJ |
138 | static void |
139 | do_bfd_delete_cleanup (void *arg) | |
140 | { | |
9a3c8263 | 141 | bfd *obfd = (bfd *) arg; |
14d1346b DJ |
142 | const char *filename = obfd->filename; |
143 | ||
9a3c8263 | 144 | gdb_bfd_unref ((bfd *) arg); |
14d1346b DJ |
145 | unlink (filename); |
146 | } | |
147 | ||
0156b218 MS |
148 | /* gcore_command -- implements the 'gcore' command. |
149 | Generate a core file from the inferior process. */ | |
150 | ||
151 | static void | |
152 | gcore_command (char *args, int from_tty) | |
153 | { | |
1e351ed1 PA |
154 | struct cleanup *filename_chain; |
155 | struct cleanup *bfd_chain; | |
156 | char *corefilename; | |
0156b218 MS |
157 | bfd *obfd; |
158 | ||
159 | /* No use generating a corefile without a target process. */ | |
160 | if (!target_has_execution) | |
161 | noprocess (); | |
162 | ||
163 | if (args && *args) | |
1e351ed1 | 164 | corefilename = tilde_expand (args); |
0156b218 MS |
165 | else |
166 | { | |
167 | /* Default corefile name is "core.PID". */ | |
dfd4cc63 | 168 | corefilename = xstrprintf ("core.%d", ptid_get_pid (inferior_ptid)); |
be4d1333 | 169 | } |
1e351ed1 | 170 | filename_chain = make_cleanup (xfree, corefilename); |
be4d1333 | 171 | |
0156b218 MS |
172 | if (info_verbose) |
173 | fprintf_filtered (gdb_stdout, | |
174 | "Opening corefile '%s' for output.\n", corefilename); | |
175 | ||
176 | /* Open the output file. */ | |
177 | obfd = create_gcore_bfd (corefilename); | |
178 | ||
14d1346b | 179 | /* Need a cleanup that will close and delete the file. */ |
1e351ed1 | 180 | bfd_chain = make_cleanup (do_bfd_delete_cleanup, obfd); |
0156b218 MS |
181 | |
182 | /* Call worker function. */ | |
183 | write_gcore_file (obfd); | |
184 | ||
d3420b2f | 185 | /* Succeeded. */ |
1e351ed1 | 186 | discard_cleanups (bfd_chain); |
cbb099e8 | 187 | gdb_bfd_unref (obfd); |
1e351ed1 PA |
188 | |
189 | fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename); | |
190 | do_cleanups (filename_chain); | |
be4d1333 MS |
191 | } |
192 | ||
193 | static unsigned long | |
194 | default_gcore_mach (void) | |
195 | { | |
d3420b2f | 196 | #if 1 /* See if this even matters... */ |
6dbdc4a3 MS |
197 | return 0; |
198 | #else | |
1143fffb | 199 | |
f5656ead | 200 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch ()); |
be4d1333 MS |
201 | |
202 | if (bfdarch != NULL) | |
203 | return bfdarch->mach; | |
be4d1333 | 204 | if (exec_bfd == NULL) |
8a3fe4f8 | 205 | error (_("Can't find default bfd machine type (need execfile).")); |
be4d1333 MS |
206 | |
207 | return bfd_get_mach (exec_bfd); | |
6dbdc4a3 | 208 | #endif /* 1 */ |
be4d1333 MS |
209 | } |
210 | ||
211 | static enum bfd_architecture | |
212 | default_gcore_arch (void) | |
213 | { | |
f5656ead | 214 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch ()); |
be4d1333 MS |
215 | |
216 | if (bfdarch != NULL) | |
217 | return bfdarch->arch; | |
be4d1333 | 218 | if (exec_bfd == NULL) |
8a3fe4f8 | 219 | error (_("Can't find bfd architecture for corefile (need execfile).")); |
be4d1333 MS |
220 | |
221 | return bfd_get_arch (exec_bfd); | |
222 | } | |
223 | ||
a78c2d62 | 224 | static const char * |
be4d1333 MS |
225 | default_gcore_target (void) |
226 | { | |
a78c2d62 | 227 | /* The gdbarch may define a target to use for core files. */ |
f5656ead TT |
228 | if (gdbarch_gcore_bfd_target_p (target_gdbarch ())) |
229 | return gdbarch_gcore_bfd_target (target_gdbarch ()); | |
a78c2d62 UW |
230 | |
231 | /* Otherwise, try to fall back to the exec_bfd target. This will probably | |
232 | not work for non-ELF targets. */ | |
be4d1333 | 233 | if (exec_bfd == NULL) |
6dbdc4a3 MS |
234 | return NULL; |
235 | else | |
236 | return bfd_get_target (exec_bfd); | |
be4d1333 MS |
237 | } |
238 | ||
d3420b2f MK |
239 | /* Derive a reasonable stack segment by unwinding the target stack, |
240 | and store its limits in *BOTTOM and *TOP. Return non-zero if | |
241 | successful. */ | |
be4d1333 | 242 | |
cbb83bd1 | 243 | static int |
69db8bae | 244 | derive_stack_segment (bfd_vma *bottom, bfd_vma *top) |
be4d1333 | 245 | { |
be4d1333 MS |
246 | struct frame_info *fi, *tmp_fi; |
247 | ||
d3420b2f MK |
248 | gdb_assert (bottom); |
249 | gdb_assert (top); | |
be4d1333 | 250 | |
d3420b2f | 251 | /* Can't succeed without stack and registers. */ |
be4d1333 | 252 | if (!target_has_stack || !target_has_registers) |
d3420b2f | 253 | return 0; |
be4d1333 | 254 | |
d3420b2f MK |
255 | /* Can't succeed without current frame. */ |
256 | fi = get_current_frame (); | |
257 | if (fi == NULL) | |
258 | return 0; | |
be4d1333 | 259 | |
d3420b2f | 260 | /* Save frame pointer of TOS frame. */ |
8d357cca | 261 | *top = get_frame_base (fi); |
d3420b2f | 262 | /* If current stack pointer is more "inner", use that instead. */ |
40a6adc1 | 263 | if (gdbarch_inner_than (get_frame_arch (fi), get_frame_sp (fi), *top)) |
fb4443d8 | 264 | *top = get_frame_sp (fi); |
be4d1333 | 265 | |
d3420b2f | 266 | /* Find prev-most frame. */ |
be4d1333 MS |
267 | while ((tmp_fi = get_prev_frame (fi)) != NULL) |
268 | fi = tmp_fi; | |
269 | ||
d3420b2f | 270 | /* Save frame pointer of prev-most frame. */ |
8d357cca | 271 | *bottom = get_frame_base (fi); |
be4d1333 | 272 | |
d3420b2f MK |
273 | /* Now canonicalize their order, so that BOTTOM is a lower address |
274 | (as opposed to a lower stack frame). */ | |
be4d1333 MS |
275 | if (*bottom > *top) |
276 | { | |
d3420b2f MK |
277 | bfd_vma tmp_vma; |
278 | ||
be4d1333 MS |
279 | tmp_vma = *top; |
280 | *top = *bottom; | |
281 | *bottom = tmp_vma; | |
282 | } | |
283 | ||
d3420b2f | 284 | return 1; |
be4d1333 MS |
285 | } |
286 | ||
0156b218 MS |
287 | /* call_target_sbrk -- |
288 | helper function for derive_heap_segment. */ | |
289 | ||
290 | static bfd_vma | |
291 | call_target_sbrk (int sbrk_arg) | |
292 | { | |
293 | struct objfile *sbrk_objf; | |
294 | struct gdbarch *gdbarch; | |
295 | bfd_vma top_of_heap; | |
296 | struct value *target_sbrk_arg; | |
297 | struct value *sbrk_fn, *ret; | |
298 | bfd_vma tmp; | |
299 | ||
3b7344d5 | 300 | if (lookup_minimal_symbol ("sbrk", NULL, NULL).minsym != NULL) |
0156b218 MS |
301 | { |
302 | sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf); | |
303 | if (sbrk_fn == NULL) | |
304 | return (bfd_vma) 0; | |
305 | } | |
3b7344d5 | 306 | else if (lookup_minimal_symbol ("_sbrk", NULL, NULL).minsym != NULL) |
0156b218 MS |
307 | { |
308 | sbrk_fn = find_function_in_inferior ("_sbrk", &sbrk_objf); | |
309 | if (sbrk_fn == NULL) | |
310 | return (bfd_vma) 0; | |
311 | } | |
312 | else | |
313 | return (bfd_vma) 0; | |
314 | ||
315 | gdbarch = get_objfile_arch (sbrk_objf); | |
316 | target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
317 | sbrk_arg); | |
318 | gdb_assert (target_sbrk_arg); | |
319 | ret = call_function_by_hand (sbrk_fn, 1, &target_sbrk_arg); | |
320 | if (ret == NULL) | |
321 | return (bfd_vma) 0; | |
322 | ||
323 | tmp = value_as_long (ret); | |
324 | if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff) | |
325 | return (bfd_vma) 0; | |
326 | ||
327 | top_of_heap = tmp; | |
328 | return top_of_heap; | |
329 | } | |
330 | ||
d3420b2f MK |
331 | /* Derive a reasonable heap segment for ABFD by looking at sbrk and |
332 | the static data sections. Store its limits in *BOTTOM and *TOP. | |
333 | Return non-zero if successful. */ | |
be4d1333 | 334 | |
cbb83bd1 | 335 | static int |
69db8bae | 336 | derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) |
be4d1333 MS |
337 | { |
338 | bfd_vma top_of_data_memory = 0; | |
339 | bfd_vma top_of_heap = 0; | |
340 | bfd_size_type sec_size; | |
be4d1333 MS |
341 | bfd_vma sec_vaddr; |
342 | asection *sec; | |
343 | ||
d3420b2f MK |
344 | gdb_assert (bottom); |
345 | gdb_assert (top); | |
be4d1333 | 346 | |
d3420b2f MK |
347 | /* This function depends on being able to call a function in the |
348 | inferior. */ | |
be4d1333 | 349 | if (!target_has_execution) |
d3420b2f MK |
350 | return 0; |
351 | ||
352 | /* The following code assumes that the link map is arranged as | |
353 | follows (low to high addresses): | |
be4d1333 | 354 | |
d3420b2f MK |
355 | --------------------------------- |
356 | | text sections | | |
357 | --------------------------------- | |
358 | | data sections (including bss) | | |
359 | --------------------------------- | |
360 | | heap | | |
361 | --------------------------------- */ | |
be4d1333 MS |
362 | |
363 | for (sec = abfd->sections; sec; sec = sec->next) | |
364 | { | |
d3420b2f MK |
365 | if (bfd_get_section_flags (abfd, sec) & SEC_DATA |
366 | || strcmp (".bss", bfd_section_name (abfd, sec)) == 0) | |
be4d1333 MS |
367 | { |
368 | sec_vaddr = bfd_get_section_vma (abfd, sec); | |
2c500098 | 369 | sec_size = bfd_get_section_size (sec); |
be4d1333 MS |
370 | if (sec_vaddr + sec_size > top_of_data_memory) |
371 | top_of_data_memory = sec_vaddr + sec_size; | |
372 | } | |
373 | } | |
d3420b2f | 374 | |
0156b218 MS |
375 | top_of_heap = call_target_sbrk (0); |
376 | if (top_of_heap == (bfd_vma) 0) | |
be4d1333 | 377 | return 0; |
be4d1333 | 378 | |
d3420b2f | 379 | /* Return results. */ |
be4d1333 MS |
380 | if (top_of_heap > top_of_data_memory) |
381 | { | |
382 | *bottom = top_of_data_memory; | |
383 | *top = top_of_heap; | |
d3420b2f | 384 | return 1; |
be4d1333 | 385 | } |
d3420b2f MK |
386 | |
387 | /* No additional heap space needs to be saved. */ | |
388 | return 0; | |
be4d1333 MS |
389 | } |
390 | ||
be4d1333 MS |
391 | static void |
392 | make_output_phdrs (bfd *obfd, asection *osec, void *ignored) | |
393 | { | |
394 | int p_flags = 0; | |
0156b218 | 395 | int p_type = 0; |
be4d1333 MS |
396 | |
397 | /* FIXME: these constants may only be applicable for ELF. */ | |
61012eef | 398 | if (startswith (bfd_section_name (obfd, osec), "load")) |
be4d1333 | 399 | p_type = PT_LOAD; |
61012eef | 400 | else if (startswith (bfd_section_name (obfd, osec), "note")) |
be4d1333 | 401 | p_type = PT_NOTE; |
0156b218 MS |
402 | else |
403 | p_type = PT_NULL; | |
be4d1333 MS |
404 | |
405 | p_flags |= PF_R; /* Segment is readable. */ | |
406 | if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY)) | |
407 | p_flags |= PF_W; /* Segment is writable. */ | |
408 | if (bfd_get_section_flags (obfd, osec) & SEC_CODE) | |
409 | p_flags |= PF_X; /* Segment is executable. */ | |
410 | ||
d3420b2f | 411 | bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, 0, 0, 1, &osec); |
be4d1333 MS |
412 | } |
413 | ||
4f69f4c2 JK |
414 | /* find_memory_region_ftype implementation. DATA is 'bfd *' for the core file |
415 | GDB is creating. */ | |
416 | ||
cbb83bd1 | 417 | static int |
4f69f4c2 JK |
418 | gcore_create_callback (CORE_ADDR vaddr, unsigned long size, int read, |
419 | int write, int exec, int modified, void *data) | |
be4d1333 | 420 | { |
9a3c8263 | 421 | bfd *obfd = (bfd *) data; |
be4d1333 | 422 | asection *osec; |
cbb83bd1 RM |
423 | flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD; |
424 | ||
86fbe6cc EZ |
425 | /* If the memory segment has no permissions set, ignore it, otherwise |
426 | when we later try to access it for read/write, we'll get an error | |
427 | or jam the kernel. */ | |
4f69f4c2 | 428 | if (read == 0 && write == 0 && exec == 0 && modified == 0) |
86fbe6cc EZ |
429 | { |
430 | if (info_verbose) | |
431 | { | |
5af949e3 | 432 | fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at %s\n", |
f5656ead | 433 | plongest (size), paddress (target_gdbarch (), vaddr)); |
86fbe6cc EZ |
434 | } |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
4f69f4c2 | 439 | if (write == 0 && modified == 0 && !solib_keep_data_in_core (vaddr, size)) |
cbb83bd1 RM |
440 | { |
441 | /* See if this region of memory lies inside a known file on disk. | |
442 | If so, we can avoid copying its contents by clearing SEC_LOAD. */ | |
443 | struct objfile *objfile; | |
444 | struct obj_section *objsec; | |
445 | ||
446 | ALL_OBJSECTIONS (objfile, objsec) | |
447 | { | |
448 | bfd *abfd = objfile->obfd; | |
449 | asection *asec = objsec->the_bfd_section; | |
450 | bfd_vma align = (bfd_vma) 1 << bfd_get_section_alignment (abfd, | |
451 | asec); | |
f1f6aadf PA |
452 | bfd_vma start = obj_section_addr (objsec) & -align; |
453 | bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align; | |
d8734c88 | 454 | |
cbb83bd1 RM |
455 | /* Match if either the entire memory region lies inside the |
456 | section (i.e. a mapping covering some pages of a large | |
457 | segment) or the entire section lies inside the memory region | |
458 | (i.e. a mapping covering multiple small sections). | |
459 | ||
460 | This BFD was synthesized from reading target memory, | |
461 | we don't want to omit that. */ | |
0c013353 JK |
462 | if (objfile->separate_debug_objfile_backlink == NULL |
463 | && ((vaddr >= start && vaddr + size <= end) | |
464 | || (start >= vaddr && end <= vaddr + size)) | |
cbb83bd1 RM |
465 | && !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY)) |
466 | { | |
349126ea | 467 | flags &= ~(SEC_LOAD | SEC_HAS_CONTENTS); |
0963b4bd | 468 | goto keep; /* Break out of two nested for loops. */ |
cbb83bd1 RM |
469 | } |
470 | } | |
471 | ||
4f69f4c2 | 472 | keep:; |
cbb83bd1 RM |
473 | } |
474 | ||
4f69f4c2 JK |
475 | if (write == 0) |
476 | flags |= SEC_READONLY; | |
477 | ||
cbb83bd1 RM |
478 | if (exec) |
479 | flags |= SEC_CODE; | |
480 | else | |
481 | flags |= SEC_DATA; | |
be4d1333 | 482 | |
52b57208 | 483 | osec = bfd_make_section_anyway_with_flags (obfd, "load", flags); |
d3420b2f | 484 | if (osec == NULL) |
be4d1333 | 485 | { |
8a3fe4f8 | 486 | warning (_("Couldn't make gcore segment: %s"), |
be4d1333 | 487 | bfd_errmsg (bfd_get_error ())); |
cbb83bd1 | 488 | return 1; |
be4d1333 MS |
489 | } |
490 | ||
491 | if (info_verbose) | |
492 | { | |
5af949e3 | 493 | fprintf_filtered (gdb_stdout, "Save segment, %s bytes at %s\n", |
f5656ead | 494 | plongest (size), paddress (target_gdbarch (), vaddr)); |
be4d1333 MS |
495 | } |
496 | ||
497 | bfd_set_section_size (obfd, osec, size); | |
cbb83bd1 | 498 | bfd_set_section_vma (obfd, osec, vaddr); |
d3420b2f | 499 | bfd_section_lma (obfd, osec) = 0; /* ??? bfd_set_section_lma? */ |
cbb83bd1 | 500 | return 0; |
be4d1333 MS |
501 | } |
502 | ||
b427c1bc TT |
503 | int |
504 | objfile_find_memory_regions (struct target_ops *self, | |
505 | find_memory_region_ftype func, void *obfd) | |
be4d1333 | 506 | { |
d3420b2f | 507 | /* Use objfile data to create memory sections. */ |
be4d1333 MS |
508 | struct objfile *objfile; |
509 | struct obj_section *objsec; | |
510 | bfd_vma temp_bottom, temp_top; | |
511 | ||
d3420b2f | 512 | /* Call callback function for each objfile section. */ |
be4d1333 MS |
513 | ALL_OBJSECTIONS (objfile, objsec) |
514 | { | |
515 | bfd *ibfd = objfile->obfd; | |
516 | asection *isec = objsec->the_bfd_section; | |
517 | flagword flags = bfd_get_section_flags (ibfd, isec); | |
be4d1333 | 518 | |
4f69f4c2 JK |
519 | /* Separate debug info files are irrelevant for gcore. */ |
520 | if (objfile->separate_debug_objfile_backlink != NULL) | |
521 | continue; | |
522 | ||
be4d1333 MS |
523 | if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) |
524 | { | |
525 | int size = bfd_section_size (ibfd, isec); | |
526 | int ret; | |
527 | ||
c6913b7d | 528 | ret = (*func) (obj_section_addr (objsec), size, |
d3420b2f MK |
529 | 1, /* All sections will be readable. */ |
530 | (flags & SEC_READONLY) == 0, /* Writable. */ | |
531 | (flags & SEC_CODE) != 0, /* Executable. */ | |
4f69f4c2 | 532 | 1, /* MODIFIED is unknown, pass it as true. */ |
d3420b2f MK |
533 | obfd); |
534 | if (ret != 0) | |
be4d1333 MS |
535 | return ret; |
536 | } | |
537 | } | |
538 | ||
d3420b2f | 539 | /* Make a stack segment. */ |
be4d1333 | 540 | if (derive_stack_segment (&temp_bottom, &temp_top)) |
cbb83bd1 | 541 | (*func) (temp_bottom, temp_top - temp_bottom, |
d3420b2f MK |
542 | 1, /* Stack section will be readable. */ |
543 | 1, /* Stack section will be writable. */ | |
544 | 0, /* Stack section will not be executable. */ | |
4f69f4c2 | 545 | 1, /* Stack section will be modified. */ |
be4d1333 MS |
546 | obfd); |
547 | ||
0963b4bd | 548 | /* Make a heap segment. */ |
be4d1333 | 549 | if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top)) |
d3420b2f MK |
550 | (*func) (temp_bottom, temp_top - temp_bottom, |
551 | 1, /* Heap section will be readable. */ | |
552 | 1, /* Heap section will be writable. */ | |
553 | 0, /* Heap section will not be executable. */ | |
4f69f4c2 | 554 | 1, /* Heap section will be modified. */ |
be4d1333 | 555 | obfd); |
d3420b2f | 556 | |
be4d1333 MS |
557 | return 0; |
558 | } | |
559 | ||
560 | static void | |
561 | gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) | |
562 | { | |
804e0f53 DJ |
563 | bfd_size_type size, total_size = bfd_section_size (obfd, osec); |
564 | file_ptr offset = 0; | |
be4d1333 | 565 | struct cleanup *old_chain = NULL; |
7c543f7b | 566 | gdb_byte *memhunk; |
be4d1333 | 567 | |
cbb83bd1 RM |
568 | /* Read-only sections are marked; we don't have to copy their contents. */ |
569 | if ((bfd_get_section_flags (obfd, osec) & SEC_LOAD) == 0) | |
d3420b2f MK |
570 | return; |
571 | ||
572 | /* Only interested in "load" sections. */ | |
61012eef | 573 | if (!startswith (bfd_section_name (obfd, osec), "load")) |
d3420b2f | 574 | return; |
be4d1333 | 575 | |
325fac50 | 576 | size = std::min (total_size, (bfd_size_type) MAX_COPY_BYTES); |
7c543f7b | 577 | memhunk = (gdb_byte *) xmalloc (size); |
be4d1333 MS |
578 | old_chain = make_cleanup (xfree, memhunk); |
579 | ||
804e0f53 DJ |
580 | while (total_size > 0) |
581 | { | |
582 | if (size > total_size) | |
583 | size = total_size; | |
584 | ||
585 | if (target_read_memory (bfd_section_vma (obfd, osec) + offset, | |
586 | memhunk, size) != 0) | |
587 | { | |
3e43a32a MS |
588 | warning (_("Memory read failed for corefile " |
589 | "section, %s bytes at %s."), | |
5af949e3 | 590 | plongest (size), |
f5656ead | 591 | paddress (target_gdbarch (), bfd_section_vma (obfd, osec))); |
804e0f53 DJ |
592 | break; |
593 | } | |
594 | if (!bfd_set_section_contents (obfd, osec, memhunk, offset, size)) | |
595 | { | |
596 | warning (_("Failed to write corefile contents (%s)."), | |
597 | bfd_errmsg (bfd_get_error ())); | |
598 | break; | |
599 | } | |
600 | ||
601 | total_size -= size; | |
602 | offset += size; | |
603 | } | |
be4d1333 | 604 | |
d3420b2f | 605 | do_cleanups (old_chain); /* Frees MEMHUNK. */ |
be4d1333 MS |
606 | } |
607 | ||
608 | static int | |
609 | gcore_memory_sections (bfd *obfd) | |
610 | { | |
35c2fab7 | 611 | /* Try gdbarch method first, then fall back to target method. */ |
f5656ead TT |
612 | if (!gdbarch_find_memory_regions_p (target_gdbarch ()) |
613 | || gdbarch_find_memory_regions (target_gdbarch (), | |
35c2fab7 UW |
614 | gcore_create_callback, obfd) != 0) |
615 | { | |
616 | if (target_find_memory_regions (gcore_create_callback, obfd) != 0) | |
617 | return 0; /* FIXME: error return/msg? */ | |
618 | } | |
be4d1333 | 619 | |
d3420b2f | 620 | /* Record phdrs for section-to-segment mapping. */ |
be4d1333 MS |
621 | bfd_map_over_sections (obfd, make_output_phdrs, NULL); |
622 | ||
d3420b2f | 623 | /* Copy memory region contents. */ |
be4d1333 MS |
624 | bfd_map_over_sections (obfd, gcore_copy_callback, NULL); |
625 | ||
d3420b2f | 626 | return 1; |
be4d1333 MS |
627 | } |
628 | ||
2c0b251b PA |
629 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
630 | extern initialize_file_ftype _initialize_gcore; | |
631 | ||
be4d1333 MS |
632 | void |
633 | _initialize_gcore (void) | |
634 | { | |
1bedd215 | 635 | add_com ("generate-core-file", class_files, gcore_command, _("\ |
d3420b2f | 636 | Save a core file with the current state of the debugged process.\n\ |
1bedd215 | 637 | Argument is optional filename. Default filename is 'core.<process_id>'.")); |
be4d1333 MS |
638 | |
639 | add_com_alias ("gcore", "generate-core-file", class_files, 1); | |
be4d1333 | 640 | } |