Commit | Line | Data |
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be4d1333 | 1 | /* Generate a core file for the inferior process. |
1bac305b | 2 | |
ecd75fc8 | 3 | Copyright (C) 2001-2014 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" |
be4d1333 | 37 | |
804e0f53 DJ |
38 | /* The largest amount of memory to read from the target at once. We |
39 | must throttle it to limit the amount of memory used by GDB during | |
40 | generate-core-file for programs with large resident data. */ | |
41 | #define MAX_COPY_BYTES (1024 * 1024) | |
42 | ||
a78c2d62 | 43 | static const char *default_gcore_target (void); |
d3420b2f MK |
44 | static enum bfd_architecture default_gcore_arch (void); |
45 | static unsigned long default_gcore_mach (void); | |
46 | static int gcore_memory_sections (bfd *); | |
47 | ||
0156b218 MS |
48 | /* create_gcore_bfd -- helper for gcore_command (exported). |
49 | Open a new bfd core file for output, and return the handle. */ | |
be4d1333 | 50 | |
0156b218 | 51 | bfd * |
85e1311a | 52 | create_gcore_bfd (const char *filename) |
be4d1333 | 53 | { |
1e351ed1 | 54 | bfd *obfd = gdb_bfd_openw (filename, default_gcore_target ()); |
d8734c88 | 55 | |
d3420b2f | 56 | if (!obfd) |
0156b218 | 57 | error (_("Failed to open '%s' for output."), filename); |
be4d1333 MS |
58 | bfd_set_format (obfd, bfd_core); |
59 | bfd_set_arch_mach (obfd, default_gcore_arch (), default_gcore_mach ()); | |
0156b218 MS |
60 | return obfd; |
61 | } | |
62 | ||
5fff78c4 | 63 | /* write_gcore_file_1 -- do the actual work of write_gcore_file. */ |
0156b218 | 64 | |
5fff78c4 MM |
65 | static void |
66 | write_gcore_file_1 (bfd *obfd) | |
0156b218 | 67 | { |
1d1f1ccb | 68 | struct cleanup *cleanup; |
0156b218 MS |
69 | void *note_data = NULL; |
70 | int note_size = 0; | |
71 | asection *note_sec = NULL; | |
be4d1333 | 72 | |
d3420b2f | 73 | /* An external target method must build the notes section. */ |
6432734d UW |
74 | /* FIXME: uweigand/2011-10-06: All architectures that support core file |
75 | generation should be converted to gdbarch_make_corefile_notes; at that | |
76 | point, the target vector method can be removed. */ | |
f5656ead | 77 | if (!gdbarch_make_corefile_notes_p (target_gdbarch ())) |
6432734d UW |
78 | note_data = target_make_corefile_notes (obfd, ¬e_size); |
79 | else | |
f5656ead | 80 | note_data = gdbarch_make_corefile_notes (target_gdbarch (), obfd, ¬e_size); |
6432734d | 81 | |
1d1f1ccb MM |
82 | cleanup = make_cleanup (xfree, note_data); |
83 | ||
6432734d UW |
84 | if (note_data == NULL || note_size == 0) |
85 | error (_("Target does not support core file generation.")); | |
be4d1333 | 86 | |
d3420b2f | 87 | /* Create the note section. */ |
6432734d UW |
88 | note_sec = bfd_make_section_anyway_with_flags (obfd, "note0", |
89 | SEC_HAS_CONTENTS | |
90 | | SEC_READONLY | |
91 | | SEC_ALLOC); | |
92 | if (note_sec == NULL) | |
93 | error (_("Failed to create 'note' section for corefile: %s"), | |
94 | bfd_errmsg (bfd_get_error ())); | |
95 | ||
96 | bfd_set_section_vma (obfd, note_sec, 0); | |
97 | bfd_set_section_alignment (obfd, note_sec, 0); | |
98 | bfd_set_section_size (obfd, note_sec, note_size); | |
be4d1333 | 99 | |
d3420b2f | 100 | /* Now create the memory/load sections. */ |
be4d1333 | 101 | if (gcore_memory_sections (obfd) == 0) |
8a3fe4f8 | 102 | error (_("gcore: failed to get corefile memory sections from target.")); |
be4d1333 | 103 | |
d3420b2f | 104 | /* Write out the contents of the note section. */ |
6432734d UW |
105 | if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size)) |
106 | warning (_("writing note section (%s)"), bfd_errmsg (bfd_get_error ())); | |
1d1f1ccb MM |
107 | |
108 | do_cleanups (cleanup); | |
0156b218 MS |
109 | } |
110 | ||
5fff78c4 MM |
111 | /* write_gcore_file -- helper for gcore_command (exported). |
112 | Compose and write the corefile data to the core file. */ | |
113 | ||
114 | void | |
115 | write_gcore_file (bfd *obfd) | |
116 | { | |
117 | volatile struct gdb_exception except; | |
118 | ||
119 | target_prepare_to_generate_core (); | |
120 | ||
121 | TRY_CATCH (except, RETURN_MASK_ALL) | |
122 | write_gcore_file_1 (obfd); | |
123 | ||
124 | target_done_generating_core (); | |
125 | ||
126 | if (except.reason < 0) | |
127 | throw_exception (except); | |
128 | } | |
129 | ||
14d1346b DJ |
130 | static void |
131 | do_bfd_delete_cleanup (void *arg) | |
132 | { | |
133 | bfd *obfd = arg; | |
134 | const char *filename = obfd->filename; | |
135 | ||
cbb099e8 | 136 | gdb_bfd_unref (arg); |
14d1346b DJ |
137 | unlink (filename); |
138 | } | |
139 | ||
0156b218 MS |
140 | /* gcore_command -- implements the 'gcore' command. |
141 | Generate a core file from the inferior process. */ | |
142 | ||
143 | static void | |
144 | gcore_command (char *args, int from_tty) | |
145 | { | |
1e351ed1 PA |
146 | struct cleanup *filename_chain; |
147 | struct cleanup *bfd_chain; | |
148 | char *corefilename; | |
0156b218 MS |
149 | bfd *obfd; |
150 | ||
151 | /* No use generating a corefile without a target process. */ | |
152 | if (!target_has_execution) | |
153 | noprocess (); | |
154 | ||
155 | if (args && *args) | |
1e351ed1 | 156 | corefilename = tilde_expand (args); |
0156b218 MS |
157 | else |
158 | { | |
159 | /* Default corefile name is "core.PID". */ | |
dfd4cc63 | 160 | corefilename = xstrprintf ("core.%d", ptid_get_pid (inferior_ptid)); |
be4d1333 | 161 | } |
1e351ed1 | 162 | filename_chain = make_cleanup (xfree, corefilename); |
be4d1333 | 163 | |
0156b218 MS |
164 | if (info_verbose) |
165 | fprintf_filtered (gdb_stdout, | |
166 | "Opening corefile '%s' for output.\n", corefilename); | |
167 | ||
168 | /* Open the output file. */ | |
169 | obfd = create_gcore_bfd (corefilename); | |
170 | ||
14d1346b | 171 | /* Need a cleanup that will close and delete the file. */ |
1e351ed1 | 172 | bfd_chain = make_cleanup (do_bfd_delete_cleanup, obfd); |
0156b218 MS |
173 | |
174 | /* Call worker function. */ | |
175 | write_gcore_file (obfd); | |
176 | ||
d3420b2f | 177 | /* Succeeded. */ |
1e351ed1 | 178 | discard_cleanups (bfd_chain); |
cbb099e8 | 179 | gdb_bfd_unref (obfd); |
1e351ed1 PA |
180 | |
181 | fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename); | |
182 | do_cleanups (filename_chain); | |
be4d1333 MS |
183 | } |
184 | ||
185 | static unsigned long | |
186 | default_gcore_mach (void) | |
187 | { | |
d3420b2f | 188 | #if 1 /* See if this even matters... */ |
6dbdc4a3 MS |
189 | return 0; |
190 | #else | |
1143fffb | 191 | |
f5656ead | 192 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch ()); |
be4d1333 MS |
193 | |
194 | if (bfdarch != NULL) | |
195 | return bfdarch->mach; | |
be4d1333 | 196 | if (exec_bfd == NULL) |
8a3fe4f8 | 197 | error (_("Can't find default bfd machine type (need execfile).")); |
be4d1333 MS |
198 | |
199 | return bfd_get_mach (exec_bfd); | |
6dbdc4a3 | 200 | #endif /* 1 */ |
be4d1333 MS |
201 | } |
202 | ||
203 | static enum bfd_architecture | |
204 | default_gcore_arch (void) | |
205 | { | |
f5656ead | 206 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch ()); |
be4d1333 MS |
207 | |
208 | if (bfdarch != NULL) | |
209 | return bfdarch->arch; | |
be4d1333 | 210 | if (exec_bfd == NULL) |
8a3fe4f8 | 211 | error (_("Can't find bfd architecture for corefile (need execfile).")); |
be4d1333 MS |
212 | |
213 | return bfd_get_arch (exec_bfd); | |
214 | } | |
215 | ||
a78c2d62 | 216 | static const char * |
be4d1333 MS |
217 | default_gcore_target (void) |
218 | { | |
a78c2d62 | 219 | /* The gdbarch may define a target to use for core files. */ |
f5656ead TT |
220 | if (gdbarch_gcore_bfd_target_p (target_gdbarch ())) |
221 | return gdbarch_gcore_bfd_target (target_gdbarch ()); | |
a78c2d62 UW |
222 | |
223 | /* Otherwise, try to fall back to the exec_bfd target. This will probably | |
224 | not work for non-ELF targets. */ | |
be4d1333 | 225 | if (exec_bfd == NULL) |
6dbdc4a3 MS |
226 | return NULL; |
227 | else | |
228 | return bfd_get_target (exec_bfd); | |
be4d1333 MS |
229 | } |
230 | ||
d3420b2f MK |
231 | /* Derive a reasonable stack segment by unwinding the target stack, |
232 | and store its limits in *BOTTOM and *TOP. Return non-zero if | |
233 | successful. */ | |
be4d1333 | 234 | |
cbb83bd1 | 235 | static int |
69db8bae | 236 | derive_stack_segment (bfd_vma *bottom, bfd_vma *top) |
be4d1333 | 237 | { |
be4d1333 MS |
238 | struct frame_info *fi, *tmp_fi; |
239 | ||
d3420b2f MK |
240 | gdb_assert (bottom); |
241 | gdb_assert (top); | |
be4d1333 | 242 | |
d3420b2f | 243 | /* Can't succeed without stack and registers. */ |
be4d1333 | 244 | if (!target_has_stack || !target_has_registers) |
d3420b2f | 245 | return 0; |
be4d1333 | 246 | |
d3420b2f MK |
247 | /* Can't succeed without current frame. */ |
248 | fi = get_current_frame (); | |
249 | if (fi == NULL) | |
250 | return 0; | |
be4d1333 | 251 | |
d3420b2f | 252 | /* Save frame pointer of TOS frame. */ |
8d357cca | 253 | *top = get_frame_base (fi); |
d3420b2f | 254 | /* If current stack pointer is more "inner", use that instead. */ |
40a6adc1 | 255 | if (gdbarch_inner_than (get_frame_arch (fi), get_frame_sp (fi), *top)) |
fb4443d8 | 256 | *top = get_frame_sp (fi); |
be4d1333 | 257 | |
d3420b2f | 258 | /* Find prev-most frame. */ |
be4d1333 MS |
259 | while ((tmp_fi = get_prev_frame (fi)) != NULL) |
260 | fi = tmp_fi; | |
261 | ||
d3420b2f | 262 | /* Save frame pointer of prev-most frame. */ |
8d357cca | 263 | *bottom = get_frame_base (fi); |
be4d1333 | 264 | |
d3420b2f MK |
265 | /* Now canonicalize their order, so that BOTTOM is a lower address |
266 | (as opposed to a lower stack frame). */ | |
be4d1333 MS |
267 | if (*bottom > *top) |
268 | { | |
d3420b2f MK |
269 | bfd_vma tmp_vma; |
270 | ||
be4d1333 MS |
271 | tmp_vma = *top; |
272 | *top = *bottom; | |
273 | *bottom = tmp_vma; | |
274 | } | |
275 | ||
d3420b2f | 276 | return 1; |
be4d1333 MS |
277 | } |
278 | ||
0156b218 MS |
279 | /* call_target_sbrk -- |
280 | helper function for derive_heap_segment. */ | |
281 | ||
282 | static bfd_vma | |
283 | call_target_sbrk (int sbrk_arg) | |
284 | { | |
285 | struct objfile *sbrk_objf; | |
286 | struct gdbarch *gdbarch; | |
287 | bfd_vma top_of_heap; | |
288 | struct value *target_sbrk_arg; | |
289 | struct value *sbrk_fn, *ret; | |
290 | bfd_vma tmp; | |
291 | ||
3b7344d5 | 292 | if (lookup_minimal_symbol ("sbrk", NULL, NULL).minsym != NULL) |
0156b218 MS |
293 | { |
294 | sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf); | |
295 | if (sbrk_fn == NULL) | |
296 | return (bfd_vma) 0; | |
297 | } | |
3b7344d5 | 298 | else if (lookup_minimal_symbol ("_sbrk", NULL, NULL).minsym != NULL) |
0156b218 MS |
299 | { |
300 | sbrk_fn = find_function_in_inferior ("_sbrk", &sbrk_objf); | |
301 | if (sbrk_fn == NULL) | |
302 | return (bfd_vma) 0; | |
303 | } | |
304 | else | |
305 | return (bfd_vma) 0; | |
306 | ||
307 | gdbarch = get_objfile_arch (sbrk_objf); | |
308 | target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
309 | sbrk_arg); | |
310 | gdb_assert (target_sbrk_arg); | |
311 | ret = call_function_by_hand (sbrk_fn, 1, &target_sbrk_arg); | |
312 | if (ret == NULL) | |
313 | return (bfd_vma) 0; | |
314 | ||
315 | tmp = value_as_long (ret); | |
316 | if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff) | |
317 | return (bfd_vma) 0; | |
318 | ||
319 | top_of_heap = tmp; | |
320 | return top_of_heap; | |
321 | } | |
322 | ||
d3420b2f MK |
323 | /* Derive a reasonable heap segment for ABFD by looking at sbrk and |
324 | the static data sections. Store its limits in *BOTTOM and *TOP. | |
325 | Return non-zero if successful. */ | |
be4d1333 | 326 | |
cbb83bd1 | 327 | static int |
69db8bae | 328 | derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) |
be4d1333 MS |
329 | { |
330 | bfd_vma top_of_data_memory = 0; | |
331 | bfd_vma top_of_heap = 0; | |
332 | bfd_size_type sec_size; | |
be4d1333 MS |
333 | bfd_vma sec_vaddr; |
334 | asection *sec; | |
335 | ||
d3420b2f MK |
336 | gdb_assert (bottom); |
337 | gdb_assert (top); | |
be4d1333 | 338 | |
d3420b2f MK |
339 | /* This function depends on being able to call a function in the |
340 | inferior. */ | |
be4d1333 | 341 | if (!target_has_execution) |
d3420b2f MK |
342 | return 0; |
343 | ||
344 | /* The following code assumes that the link map is arranged as | |
345 | follows (low to high addresses): | |
be4d1333 | 346 | |
d3420b2f MK |
347 | --------------------------------- |
348 | | text sections | | |
349 | --------------------------------- | |
350 | | data sections (including bss) | | |
351 | --------------------------------- | |
352 | | heap | | |
353 | --------------------------------- */ | |
be4d1333 MS |
354 | |
355 | for (sec = abfd->sections; sec; sec = sec->next) | |
356 | { | |
d3420b2f MK |
357 | if (bfd_get_section_flags (abfd, sec) & SEC_DATA |
358 | || strcmp (".bss", bfd_section_name (abfd, sec)) == 0) | |
be4d1333 MS |
359 | { |
360 | sec_vaddr = bfd_get_section_vma (abfd, sec); | |
2c500098 | 361 | sec_size = bfd_get_section_size (sec); |
be4d1333 MS |
362 | if (sec_vaddr + sec_size > top_of_data_memory) |
363 | top_of_data_memory = sec_vaddr + sec_size; | |
364 | } | |
365 | } | |
d3420b2f | 366 | |
0156b218 MS |
367 | top_of_heap = call_target_sbrk (0); |
368 | if (top_of_heap == (bfd_vma) 0) | |
be4d1333 | 369 | return 0; |
be4d1333 | 370 | |
d3420b2f | 371 | /* Return results. */ |
be4d1333 MS |
372 | if (top_of_heap > top_of_data_memory) |
373 | { | |
374 | *bottom = top_of_data_memory; | |
375 | *top = top_of_heap; | |
d3420b2f | 376 | return 1; |
be4d1333 | 377 | } |
d3420b2f MK |
378 | |
379 | /* No additional heap space needs to be saved. */ | |
380 | return 0; | |
be4d1333 MS |
381 | } |
382 | ||
be4d1333 MS |
383 | static void |
384 | make_output_phdrs (bfd *obfd, asection *osec, void *ignored) | |
385 | { | |
386 | int p_flags = 0; | |
0156b218 | 387 | int p_type = 0; |
be4d1333 MS |
388 | |
389 | /* FIXME: these constants may only be applicable for ELF. */ | |
20fe79c8 | 390 | if (strncmp (bfd_section_name (obfd, osec), "load", 4) == 0) |
be4d1333 | 391 | p_type = PT_LOAD; |
0156b218 | 392 | else if (strncmp (bfd_section_name (obfd, osec), "note", 4) == 0) |
be4d1333 | 393 | p_type = PT_NOTE; |
0156b218 MS |
394 | else |
395 | p_type = PT_NULL; | |
be4d1333 MS |
396 | |
397 | p_flags |= PF_R; /* Segment is readable. */ | |
398 | if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY)) | |
399 | p_flags |= PF_W; /* Segment is writable. */ | |
400 | if (bfd_get_section_flags (obfd, osec) & SEC_CODE) | |
401 | p_flags |= PF_X; /* Segment is executable. */ | |
402 | ||
d3420b2f | 403 | bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, 0, 0, 1, &osec); |
be4d1333 MS |
404 | } |
405 | ||
4f69f4c2 JK |
406 | /* find_memory_region_ftype implementation. DATA is 'bfd *' for the core file |
407 | GDB is creating. */ | |
408 | ||
cbb83bd1 | 409 | static int |
4f69f4c2 JK |
410 | gcore_create_callback (CORE_ADDR vaddr, unsigned long size, int read, |
411 | int write, int exec, int modified, void *data) | |
be4d1333 | 412 | { |
cbb83bd1 | 413 | bfd *obfd = data; |
be4d1333 | 414 | asection *osec; |
cbb83bd1 RM |
415 | flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD; |
416 | ||
86fbe6cc EZ |
417 | /* If the memory segment has no permissions set, ignore it, otherwise |
418 | when we later try to access it for read/write, we'll get an error | |
419 | or jam the kernel. */ | |
4f69f4c2 | 420 | if (read == 0 && write == 0 && exec == 0 && modified == 0) |
86fbe6cc EZ |
421 | { |
422 | if (info_verbose) | |
423 | { | |
5af949e3 | 424 | fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at %s\n", |
f5656ead | 425 | plongest (size), paddress (target_gdbarch (), vaddr)); |
86fbe6cc EZ |
426 | } |
427 | ||
428 | return 0; | |
429 | } | |
430 | ||
4f69f4c2 | 431 | if (write == 0 && modified == 0 && !solib_keep_data_in_core (vaddr, size)) |
cbb83bd1 RM |
432 | { |
433 | /* See if this region of memory lies inside a known file on disk. | |
434 | If so, we can avoid copying its contents by clearing SEC_LOAD. */ | |
435 | struct objfile *objfile; | |
436 | struct obj_section *objsec; | |
437 | ||
438 | ALL_OBJSECTIONS (objfile, objsec) | |
439 | { | |
440 | bfd *abfd = objfile->obfd; | |
441 | asection *asec = objsec->the_bfd_section; | |
442 | bfd_vma align = (bfd_vma) 1 << bfd_get_section_alignment (abfd, | |
443 | asec); | |
f1f6aadf PA |
444 | bfd_vma start = obj_section_addr (objsec) & -align; |
445 | bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align; | |
d8734c88 | 446 | |
cbb83bd1 RM |
447 | /* Match if either the entire memory region lies inside the |
448 | section (i.e. a mapping covering some pages of a large | |
449 | segment) or the entire section lies inside the memory region | |
450 | (i.e. a mapping covering multiple small sections). | |
451 | ||
452 | This BFD was synthesized from reading target memory, | |
453 | we don't want to omit that. */ | |
0c013353 JK |
454 | if (objfile->separate_debug_objfile_backlink == NULL |
455 | && ((vaddr >= start && vaddr + size <= end) | |
456 | || (start >= vaddr && end <= vaddr + size)) | |
cbb83bd1 RM |
457 | && !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY)) |
458 | { | |
349126ea | 459 | flags &= ~(SEC_LOAD | SEC_HAS_CONTENTS); |
0963b4bd | 460 | goto keep; /* Break out of two nested for loops. */ |
cbb83bd1 RM |
461 | } |
462 | } | |
463 | ||
4f69f4c2 | 464 | keep:; |
cbb83bd1 RM |
465 | } |
466 | ||
4f69f4c2 JK |
467 | if (write == 0) |
468 | flags |= SEC_READONLY; | |
469 | ||
cbb83bd1 RM |
470 | if (exec) |
471 | flags |= SEC_CODE; | |
472 | else | |
473 | flags |= SEC_DATA; | |
be4d1333 | 474 | |
52b57208 | 475 | osec = bfd_make_section_anyway_with_flags (obfd, "load", flags); |
d3420b2f | 476 | if (osec == NULL) |
be4d1333 | 477 | { |
8a3fe4f8 | 478 | warning (_("Couldn't make gcore segment: %s"), |
be4d1333 | 479 | bfd_errmsg (bfd_get_error ())); |
cbb83bd1 | 480 | return 1; |
be4d1333 MS |
481 | } |
482 | ||
483 | if (info_verbose) | |
484 | { | |
5af949e3 | 485 | fprintf_filtered (gdb_stdout, "Save segment, %s bytes at %s\n", |
f5656ead | 486 | plongest (size), paddress (target_gdbarch (), vaddr)); |
be4d1333 MS |
487 | } |
488 | ||
489 | bfd_set_section_size (obfd, osec, size); | |
cbb83bd1 | 490 | bfd_set_section_vma (obfd, osec, vaddr); |
d3420b2f | 491 | bfd_section_lma (obfd, osec) = 0; /* ??? bfd_set_section_lma? */ |
cbb83bd1 | 492 | return 0; |
be4d1333 MS |
493 | } |
494 | ||
b427c1bc TT |
495 | int |
496 | objfile_find_memory_regions (struct target_ops *self, | |
497 | find_memory_region_ftype func, void *obfd) | |
be4d1333 | 498 | { |
d3420b2f | 499 | /* Use objfile data to create memory sections. */ |
be4d1333 MS |
500 | struct objfile *objfile; |
501 | struct obj_section *objsec; | |
502 | bfd_vma temp_bottom, temp_top; | |
503 | ||
d3420b2f | 504 | /* Call callback function for each objfile section. */ |
be4d1333 MS |
505 | ALL_OBJSECTIONS (objfile, objsec) |
506 | { | |
507 | bfd *ibfd = objfile->obfd; | |
508 | asection *isec = objsec->the_bfd_section; | |
509 | flagword flags = bfd_get_section_flags (ibfd, isec); | |
be4d1333 | 510 | |
4f69f4c2 JK |
511 | /* Separate debug info files are irrelevant for gcore. */ |
512 | if (objfile->separate_debug_objfile_backlink != NULL) | |
513 | continue; | |
514 | ||
be4d1333 MS |
515 | if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) |
516 | { | |
517 | int size = bfd_section_size (ibfd, isec); | |
518 | int ret; | |
519 | ||
c6913b7d | 520 | ret = (*func) (obj_section_addr (objsec), size, |
d3420b2f MK |
521 | 1, /* All sections will be readable. */ |
522 | (flags & SEC_READONLY) == 0, /* Writable. */ | |
523 | (flags & SEC_CODE) != 0, /* Executable. */ | |
4f69f4c2 | 524 | 1, /* MODIFIED is unknown, pass it as true. */ |
d3420b2f MK |
525 | obfd); |
526 | if (ret != 0) | |
be4d1333 MS |
527 | return ret; |
528 | } | |
529 | } | |
530 | ||
d3420b2f | 531 | /* Make a stack segment. */ |
be4d1333 | 532 | if (derive_stack_segment (&temp_bottom, &temp_top)) |
cbb83bd1 | 533 | (*func) (temp_bottom, temp_top - temp_bottom, |
d3420b2f MK |
534 | 1, /* Stack section will be readable. */ |
535 | 1, /* Stack section will be writable. */ | |
536 | 0, /* Stack section will not be executable. */ | |
4f69f4c2 | 537 | 1, /* Stack section will be modified. */ |
be4d1333 MS |
538 | obfd); |
539 | ||
0963b4bd | 540 | /* Make a heap segment. */ |
be4d1333 | 541 | if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top)) |
d3420b2f MK |
542 | (*func) (temp_bottom, temp_top - temp_bottom, |
543 | 1, /* Heap section will be readable. */ | |
544 | 1, /* Heap section will be writable. */ | |
545 | 0, /* Heap section will not be executable. */ | |
4f69f4c2 | 546 | 1, /* Heap section will be modified. */ |
be4d1333 | 547 | obfd); |
d3420b2f | 548 | |
be4d1333 MS |
549 | return 0; |
550 | } | |
551 | ||
552 | static void | |
553 | gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) | |
554 | { | |
804e0f53 DJ |
555 | bfd_size_type size, total_size = bfd_section_size (obfd, osec); |
556 | file_ptr offset = 0; | |
be4d1333 MS |
557 | struct cleanup *old_chain = NULL; |
558 | void *memhunk; | |
559 | ||
cbb83bd1 RM |
560 | /* Read-only sections are marked; we don't have to copy their contents. */ |
561 | if ((bfd_get_section_flags (obfd, osec) & SEC_LOAD) == 0) | |
d3420b2f MK |
562 | return; |
563 | ||
564 | /* Only interested in "load" sections. */ | |
20fe79c8 | 565 | if (strncmp ("load", bfd_section_name (obfd, osec), 4) != 0) |
d3420b2f | 566 | return; |
be4d1333 | 567 | |
804e0f53 | 568 | size = min (total_size, MAX_COPY_BYTES); |
d3420b2f | 569 | memhunk = xmalloc (size); |
be4d1333 MS |
570 | old_chain = make_cleanup (xfree, memhunk); |
571 | ||
804e0f53 DJ |
572 | while (total_size > 0) |
573 | { | |
574 | if (size > total_size) | |
575 | size = total_size; | |
576 | ||
577 | if (target_read_memory (bfd_section_vma (obfd, osec) + offset, | |
578 | memhunk, size) != 0) | |
579 | { | |
3e43a32a MS |
580 | warning (_("Memory read failed for corefile " |
581 | "section, %s bytes at %s."), | |
5af949e3 | 582 | plongest (size), |
f5656ead | 583 | paddress (target_gdbarch (), bfd_section_vma (obfd, osec))); |
804e0f53 DJ |
584 | break; |
585 | } | |
586 | if (!bfd_set_section_contents (obfd, osec, memhunk, offset, size)) | |
587 | { | |
588 | warning (_("Failed to write corefile contents (%s)."), | |
589 | bfd_errmsg (bfd_get_error ())); | |
590 | break; | |
591 | } | |
592 | ||
593 | total_size -= size; | |
594 | offset += size; | |
595 | } | |
be4d1333 | 596 | |
d3420b2f | 597 | do_cleanups (old_chain); /* Frees MEMHUNK. */ |
be4d1333 MS |
598 | } |
599 | ||
600 | static int | |
601 | gcore_memory_sections (bfd *obfd) | |
602 | { | |
35c2fab7 | 603 | /* Try gdbarch method first, then fall back to target method. */ |
f5656ead TT |
604 | if (!gdbarch_find_memory_regions_p (target_gdbarch ()) |
605 | || gdbarch_find_memory_regions (target_gdbarch (), | |
35c2fab7 UW |
606 | gcore_create_callback, obfd) != 0) |
607 | { | |
608 | if (target_find_memory_regions (gcore_create_callback, obfd) != 0) | |
609 | return 0; /* FIXME: error return/msg? */ | |
610 | } | |
be4d1333 | 611 | |
d3420b2f | 612 | /* Record phdrs for section-to-segment mapping. */ |
be4d1333 MS |
613 | bfd_map_over_sections (obfd, make_output_phdrs, NULL); |
614 | ||
d3420b2f | 615 | /* Copy memory region contents. */ |
be4d1333 MS |
616 | bfd_map_over_sections (obfd, gcore_copy_callback, NULL); |
617 | ||
d3420b2f | 618 | return 1; |
be4d1333 MS |
619 | } |
620 | ||
2c0b251b PA |
621 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
622 | extern initialize_file_ftype _initialize_gcore; | |
623 | ||
be4d1333 MS |
624 | void |
625 | _initialize_gcore (void) | |
626 | { | |
1bedd215 | 627 | add_com ("generate-core-file", class_files, gcore_command, _("\ |
d3420b2f | 628 | Save a core file with the current state of the debugged process.\n\ |
1bedd215 | 629 | Argument is optional filename. Default filename is 'core.<process_id>'.")); |
be4d1333 MS |
630 | |
631 | add_com_alias ("gcore", "generate-core-file", class_files, 1); | |
be4d1333 | 632 | } |