Commit | Line | Data |
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be4d1333 | 1 | /* Generate a core file for the inferior process. |
1bac305b | 2 | |
0fb0cc75 | 3 | Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
804e0f53 | 4 | Free Software Foundation, Inc. |
be4d1333 MS |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
be4d1333 MS |
11 | (at your option) any later version. |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
be4d1333 MS |
20 | |
21 | #include "defs.h" | |
d3420b2f MK |
22 | #include "elf-bfd.h" |
23 | #include "infcall.h" | |
be4d1333 MS |
24 | #include "inferior.h" |
25 | #include "gdbcore.h" | |
be4d1333 | 26 | #include "objfiles.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" |
d3420b2f | 32 | #include "gdb_assert.h" |
0156b218 MS |
33 | #include <fcntl.h> |
34 | #include "regcache.h" | |
35 | #include "regset.h" | |
be4d1333 | 36 | |
804e0f53 DJ |
37 | /* The largest amount of memory to read from the target at once. We |
38 | must throttle it to limit the amount of memory used by GDB during | |
39 | generate-core-file for programs with large resident data. */ | |
40 | #define MAX_COPY_BYTES (1024 * 1024) | |
41 | ||
a78c2d62 | 42 | static const char *default_gcore_target (void); |
d3420b2f MK |
43 | static enum bfd_architecture default_gcore_arch (void); |
44 | static unsigned long default_gcore_mach (void); | |
45 | static int gcore_memory_sections (bfd *); | |
46 | ||
0156b218 MS |
47 | /* create_gcore_bfd -- helper for gcore_command (exported). |
48 | Open a new bfd core file for output, and return the handle. */ | |
be4d1333 | 49 | |
0156b218 MS |
50 | bfd * |
51 | create_gcore_bfd (char *filename) | |
be4d1333 | 52 | { |
0156b218 | 53 | bfd *obfd = bfd_openw (filename, default_gcore_target ()); |
d3420b2f | 54 | if (!obfd) |
0156b218 | 55 | error (_("Failed to open '%s' for output."), filename); |
be4d1333 MS |
56 | bfd_set_format (obfd, bfd_core); |
57 | bfd_set_arch_mach (obfd, default_gcore_arch (), default_gcore_mach ()); | |
0156b218 MS |
58 | return obfd; |
59 | } | |
60 | ||
61 | /* write_gcore_file -- helper for gcore_command (exported). | |
62 | Compose and write the corefile data to the core file. */ | |
63 | ||
64 | ||
65 | void | |
66 | write_gcore_file (bfd *obfd) | |
67 | { | |
68 | void *note_data = NULL; | |
69 | int note_size = 0; | |
70 | asection *note_sec = NULL; | |
be4d1333 | 71 | |
d3420b2f MK |
72 | /* An external target method must build the notes section. */ |
73 | note_data = target_make_corefile_notes (obfd, ¬e_size); | |
be4d1333 | 74 | |
d3420b2f | 75 | /* Create the note section. */ |
be4d1333 MS |
76 | if (note_data != NULL && note_size != 0) |
77 | { | |
52b57208 L |
78 | note_sec = bfd_make_section_anyway_with_flags (obfd, "note0", |
79 | SEC_HAS_CONTENTS | |
80 | | SEC_READONLY | |
81 | | SEC_ALLOC); | |
d3420b2f | 82 | if (note_sec == NULL) |
8a3fe4f8 | 83 | error (_("Failed to create 'note' section for corefile: %s"), |
be4d1333 MS |
84 | bfd_errmsg (bfd_get_error ())); |
85 | ||
86 | bfd_set_section_vma (obfd, note_sec, 0); | |
be4d1333 MS |
87 | bfd_set_section_alignment (obfd, note_sec, 0); |
88 | bfd_set_section_size (obfd, note_sec, note_size); | |
89 | } | |
90 | ||
d3420b2f | 91 | /* Now create the memory/load sections. */ |
be4d1333 | 92 | if (gcore_memory_sections (obfd) == 0) |
8a3fe4f8 | 93 | error (_("gcore: failed to get corefile memory sections from target.")); |
be4d1333 | 94 | |
d3420b2f | 95 | /* Write out the contents of the note section. */ |
be4d1333 MS |
96 | if (note_data != NULL && note_size != 0) |
97 | { | |
98 | if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size)) | |
0156b218 MS |
99 | warning (_("writing note section (%s)"), |
100 | bfd_errmsg (bfd_get_error ())); | |
101 | } | |
102 | } | |
103 | ||
104 | /* gcore_command -- implements the 'gcore' command. | |
105 | Generate a core file from the inferior process. */ | |
106 | ||
107 | static void | |
108 | gcore_command (char *args, int from_tty) | |
109 | { | |
110 | struct cleanup *old_chain; | |
111 | char *corefilename, corefilename_buffer[40]; | |
112 | bfd *obfd; | |
113 | ||
114 | /* No use generating a corefile without a target process. */ | |
115 | if (!target_has_execution) | |
116 | noprocess (); | |
117 | ||
118 | if (args && *args) | |
119 | corefilename = args; | |
120 | else | |
121 | { | |
122 | /* Default corefile name is "core.PID". */ | |
123 | sprintf (corefilename_buffer, "core.%d", PIDGET (inferior_ptid)); | |
124 | corefilename = corefilename_buffer; | |
be4d1333 MS |
125 | } |
126 | ||
0156b218 MS |
127 | if (info_verbose) |
128 | fprintf_filtered (gdb_stdout, | |
129 | "Opening corefile '%s' for output.\n", corefilename); | |
130 | ||
131 | /* Open the output file. */ | |
132 | obfd = create_gcore_bfd (corefilename); | |
133 | ||
134 | /* Need a cleanup that will close the file (FIXME: delete it?). */ | |
135 | old_chain = make_cleanup_bfd_close (obfd); | |
136 | ||
137 | /* Call worker function. */ | |
138 | write_gcore_file (obfd); | |
139 | ||
d3420b2f MK |
140 | /* Succeeded. */ |
141 | fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename); | |
be4d1333 | 142 | |
d3420b2f | 143 | /* Clean-ups will close the output file and free malloc memory. */ |
be4d1333 MS |
144 | do_cleanups (old_chain); |
145 | return; | |
146 | } | |
147 | ||
148 | static unsigned long | |
149 | default_gcore_mach (void) | |
150 | { | |
d3420b2f | 151 | #if 1 /* See if this even matters... */ |
6dbdc4a3 MS |
152 | return 0; |
153 | #else | |
1143fffb | 154 | |
a78c2d62 | 155 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch); |
be4d1333 MS |
156 | |
157 | if (bfdarch != NULL) | |
158 | return bfdarch->mach; | |
be4d1333 | 159 | if (exec_bfd == NULL) |
8a3fe4f8 | 160 | error (_("Can't find default bfd machine type (need execfile).")); |
be4d1333 MS |
161 | |
162 | return bfd_get_mach (exec_bfd); | |
6dbdc4a3 | 163 | #endif /* 1 */ |
be4d1333 MS |
164 | } |
165 | ||
166 | static enum bfd_architecture | |
167 | default_gcore_arch (void) | |
168 | { | |
a78c2d62 | 169 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch); |
be4d1333 MS |
170 | |
171 | if (bfdarch != NULL) | |
172 | return bfdarch->arch; | |
be4d1333 | 173 | if (exec_bfd == NULL) |
8a3fe4f8 | 174 | error (_("Can't find bfd architecture for corefile (need execfile).")); |
be4d1333 MS |
175 | |
176 | return bfd_get_arch (exec_bfd); | |
177 | } | |
178 | ||
a78c2d62 | 179 | static const char * |
be4d1333 MS |
180 | default_gcore_target (void) |
181 | { | |
a78c2d62 UW |
182 | /* The gdbarch may define a target to use for core files. */ |
183 | if (gdbarch_gcore_bfd_target_p (target_gdbarch)) | |
184 | return gdbarch_gcore_bfd_target (target_gdbarch); | |
185 | ||
186 | /* Otherwise, try to fall back to the exec_bfd target. This will probably | |
187 | not work for non-ELF targets. */ | |
be4d1333 | 188 | if (exec_bfd == NULL) |
6dbdc4a3 MS |
189 | return NULL; |
190 | else | |
191 | return bfd_get_target (exec_bfd); | |
be4d1333 MS |
192 | } |
193 | ||
d3420b2f MK |
194 | /* Derive a reasonable stack segment by unwinding the target stack, |
195 | and store its limits in *BOTTOM and *TOP. Return non-zero if | |
196 | successful. */ | |
be4d1333 | 197 | |
cbb83bd1 | 198 | static int |
69db8bae | 199 | derive_stack_segment (bfd_vma *bottom, bfd_vma *top) |
be4d1333 | 200 | { |
be4d1333 MS |
201 | struct frame_info *fi, *tmp_fi; |
202 | ||
d3420b2f MK |
203 | gdb_assert (bottom); |
204 | gdb_assert (top); | |
be4d1333 | 205 | |
d3420b2f | 206 | /* Can't succeed without stack and registers. */ |
be4d1333 | 207 | if (!target_has_stack || !target_has_registers) |
d3420b2f | 208 | return 0; |
be4d1333 | 209 | |
d3420b2f MK |
210 | /* Can't succeed without current frame. */ |
211 | fi = get_current_frame (); | |
212 | if (fi == NULL) | |
213 | return 0; | |
be4d1333 | 214 | |
d3420b2f | 215 | /* Save frame pointer of TOS frame. */ |
8d357cca | 216 | *top = get_frame_base (fi); |
d3420b2f | 217 | /* If current stack pointer is more "inner", use that instead. */ |
40a6adc1 | 218 | if (gdbarch_inner_than (get_frame_arch (fi), get_frame_sp (fi), *top)) |
fb4443d8 | 219 | *top = get_frame_sp (fi); |
be4d1333 | 220 | |
d3420b2f | 221 | /* Find prev-most frame. */ |
be4d1333 MS |
222 | while ((tmp_fi = get_prev_frame (fi)) != NULL) |
223 | fi = tmp_fi; | |
224 | ||
d3420b2f | 225 | /* Save frame pointer of prev-most frame. */ |
8d357cca | 226 | *bottom = get_frame_base (fi); |
be4d1333 | 227 | |
d3420b2f MK |
228 | /* Now canonicalize their order, so that BOTTOM is a lower address |
229 | (as opposed to a lower stack frame). */ | |
be4d1333 MS |
230 | if (*bottom > *top) |
231 | { | |
d3420b2f MK |
232 | bfd_vma tmp_vma; |
233 | ||
be4d1333 MS |
234 | tmp_vma = *top; |
235 | *top = *bottom; | |
236 | *bottom = tmp_vma; | |
237 | } | |
238 | ||
d3420b2f | 239 | return 1; |
be4d1333 MS |
240 | } |
241 | ||
0156b218 MS |
242 | /* call_target_sbrk -- |
243 | helper function for derive_heap_segment. */ | |
244 | ||
245 | static bfd_vma | |
246 | call_target_sbrk (int sbrk_arg) | |
247 | { | |
248 | struct objfile *sbrk_objf; | |
249 | struct gdbarch *gdbarch; | |
250 | bfd_vma top_of_heap; | |
251 | struct value *target_sbrk_arg; | |
252 | struct value *sbrk_fn, *ret; | |
253 | bfd_vma tmp; | |
254 | ||
255 | if (lookup_minimal_symbol ("sbrk", NULL, NULL) != NULL) | |
256 | { | |
257 | sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf); | |
258 | if (sbrk_fn == NULL) | |
259 | return (bfd_vma) 0; | |
260 | } | |
261 | else if (lookup_minimal_symbol ("_sbrk", NULL, NULL) != NULL) | |
262 | { | |
263 | sbrk_fn = find_function_in_inferior ("_sbrk", &sbrk_objf); | |
264 | if (sbrk_fn == NULL) | |
265 | return (bfd_vma) 0; | |
266 | } | |
267 | else | |
268 | return (bfd_vma) 0; | |
269 | ||
270 | gdbarch = get_objfile_arch (sbrk_objf); | |
271 | target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
272 | sbrk_arg); | |
273 | gdb_assert (target_sbrk_arg); | |
274 | ret = call_function_by_hand (sbrk_fn, 1, &target_sbrk_arg); | |
275 | if (ret == NULL) | |
276 | return (bfd_vma) 0; | |
277 | ||
278 | tmp = value_as_long (ret); | |
279 | if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff) | |
280 | return (bfd_vma) 0; | |
281 | ||
282 | top_of_heap = tmp; | |
283 | return top_of_heap; | |
284 | } | |
285 | ||
d3420b2f MK |
286 | /* Derive a reasonable heap segment for ABFD by looking at sbrk and |
287 | the static data sections. Store its limits in *BOTTOM and *TOP. | |
288 | Return non-zero if successful. */ | |
be4d1333 | 289 | |
cbb83bd1 | 290 | static int |
69db8bae | 291 | derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) |
be4d1333 | 292 | { |
3e3b026f | 293 | struct gdbarch *gdbarch; |
be4d1333 MS |
294 | bfd_vma top_of_data_memory = 0; |
295 | bfd_vma top_of_heap = 0; | |
296 | bfd_size_type sec_size; | |
be4d1333 MS |
297 | bfd_vma sec_vaddr; |
298 | asection *sec; | |
299 | ||
d3420b2f MK |
300 | gdb_assert (bottom); |
301 | gdb_assert (top); | |
be4d1333 | 302 | |
d3420b2f MK |
303 | /* This function depends on being able to call a function in the |
304 | inferior. */ | |
be4d1333 | 305 | if (!target_has_execution) |
d3420b2f MK |
306 | return 0; |
307 | ||
308 | /* The following code assumes that the link map is arranged as | |
309 | follows (low to high addresses): | |
be4d1333 | 310 | |
d3420b2f MK |
311 | --------------------------------- |
312 | | text sections | | |
313 | --------------------------------- | |
314 | | data sections (including bss) | | |
315 | --------------------------------- | |
316 | | heap | | |
317 | --------------------------------- */ | |
be4d1333 MS |
318 | |
319 | for (sec = abfd->sections; sec; sec = sec->next) | |
320 | { | |
d3420b2f MK |
321 | if (bfd_get_section_flags (abfd, sec) & SEC_DATA |
322 | || strcmp (".bss", bfd_section_name (abfd, sec)) == 0) | |
be4d1333 MS |
323 | { |
324 | sec_vaddr = bfd_get_section_vma (abfd, sec); | |
2c500098 | 325 | sec_size = bfd_get_section_size (sec); |
be4d1333 MS |
326 | if (sec_vaddr + sec_size > top_of_data_memory) |
327 | top_of_data_memory = sec_vaddr + sec_size; | |
328 | } | |
329 | } | |
d3420b2f | 330 | |
0156b218 MS |
331 | top_of_heap = call_target_sbrk (0); |
332 | if (top_of_heap == (bfd_vma) 0) | |
be4d1333 | 333 | return 0; |
be4d1333 | 334 | |
d3420b2f | 335 | /* Return results. */ |
be4d1333 MS |
336 | if (top_of_heap > top_of_data_memory) |
337 | { | |
338 | *bottom = top_of_data_memory; | |
339 | *top = top_of_heap; | |
d3420b2f | 340 | return 1; |
be4d1333 | 341 | } |
d3420b2f MK |
342 | |
343 | /* No additional heap space needs to be saved. */ | |
344 | return 0; | |
be4d1333 MS |
345 | } |
346 | ||
be4d1333 MS |
347 | static void |
348 | make_output_phdrs (bfd *obfd, asection *osec, void *ignored) | |
349 | { | |
350 | int p_flags = 0; | |
0156b218 | 351 | int p_type = 0; |
be4d1333 MS |
352 | |
353 | /* FIXME: these constants may only be applicable for ELF. */ | |
20fe79c8 | 354 | if (strncmp (bfd_section_name (obfd, osec), "load", 4) == 0) |
be4d1333 | 355 | p_type = PT_LOAD; |
0156b218 | 356 | else if (strncmp (bfd_section_name (obfd, osec), "note", 4) == 0) |
be4d1333 | 357 | p_type = PT_NOTE; |
0156b218 MS |
358 | else |
359 | p_type = PT_NULL; | |
be4d1333 MS |
360 | |
361 | p_flags |= PF_R; /* Segment is readable. */ | |
362 | if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY)) | |
363 | p_flags |= PF_W; /* Segment is writable. */ | |
364 | if (bfd_get_section_flags (obfd, osec) & SEC_CODE) | |
365 | p_flags |= PF_X; /* Segment is executable. */ | |
366 | ||
d3420b2f | 367 | bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, 0, 0, 1, &osec); |
be4d1333 MS |
368 | } |
369 | ||
cbb83bd1 RM |
370 | static int |
371 | gcore_create_callback (CORE_ADDR vaddr, unsigned long size, | |
372 | int read, int write, int exec, void *data) | |
be4d1333 | 373 | { |
cbb83bd1 | 374 | bfd *obfd = data; |
be4d1333 | 375 | asection *osec; |
cbb83bd1 RM |
376 | flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD; |
377 | ||
86fbe6cc EZ |
378 | /* If the memory segment has no permissions set, ignore it, otherwise |
379 | when we later try to access it for read/write, we'll get an error | |
380 | or jam the kernel. */ | |
381 | if (read == 0 && write == 0 && exec == 0) | |
382 | { | |
383 | if (info_verbose) | |
384 | { | |
5af949e3 UW |
385 | fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at %s\n", |
386 | plongest (size), paddress (target_gdbarch, vaddr)); | |
86fbe6cc EZ |
387 | } |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
cbb83bd1 RM |
392 | if (write == 0) |
393 | { | |
394 | /* See if this region of memory lies inside a known file on disk. | |
395 | If so, we can avoid copying its contents by clearing SEC_LOAD. */ | |
396 | struct objfile *objfile; | |
397 | struct obj_section *objsec; | |
398 | ||
399 | ALL_OBJSECTIONS (objfile, objsec) | |
400 | { | |
401 | bfd *abfd = objfile->obfd; | |
402 | asection *asec = objsec->the_bfd_section; | |
403 | bfd_vma align = (bfd_vma) 1 << bfd_get_section_alignment (abfd, | |
404 | asec); | |
f1f6aadf PA |
405 | bfd_vma start = obj_section_addr (objsec) & -align; |
406 | bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align; | |
cbb83bd1 RM |
407 | /* Match if either the entire memory region lies inside the |
408 | section (i.e. a mapping covering some pages of a large | |
409 | segment) or the entire section lies inside the memory region | |
410 | (i.e. a mapping covering multiple small sections). | |
411 | ||
412 | This BFD was synthesized from reading target memory, | |
413 | we don't want to omit that. */ | |
414 | if (((vaddr >= start && vaddr + size <= end) | |
415 | || (start >= vaddr && end <= vaddr + size)) | |
416 | && !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY)) | |
417 | { | |
418 | flags &= ~SEC_LOAD; | |
52b57208 | 419 | flags |= SEC_NEVER_LOAD; |
cbb83bd1 RM |
420 | goto keep; /* break out of two nested for loops */ |
421 | } | |
422 | } | |
423 | ||
424 | keep: | |
425 | flags |= SEC_READONLY; | |
426 | } | |
427 | ||
428 | if (exec) | |
429 | flags |= SEC_CODE; | |
430 | else | |
431 | flags |= SEC_DATA; | |
be4d1333 | 432 | |
52b57208 | 433 | osec = bfd_make_section_anyway_with_flags (obfd, "load", flags); |
d3420b2f | 434 | if (osec == NULL) |
be4d1333 | 435 | { |
8a3fe4f8 | 436 | warning (_("Couldn't make gcore segment: %s"), |
be4d1333 | 437 | bfd_errmsg (bfd_get_error ())); |
cbb83bd1 | 438 | return 1; |
be4d1333 MS |
439 | } |
440 | ||
441 | if (info_verbose) | |
442 | { | |
5af949e3 UW |
443 | fprintf_filtered (gdb_stdout, "Save segment, %s bytes at %s\n", |
444 | plongest (size), paddress (target_gdbarch, vaddr)); | |
be4d1333 MS |
445 | } |
446 | ||
447 | bfd_set_section_size (obfd, osec, size); | |
cbb83bd1 | 448 | bfd_set_section_vma (obfd, osec, vaddr); |
d3420b2f | 449 | bfd_section_lma (obfd, osec) = 0; /* ??? bfd_set_section_lma? */ |
cbb83bd1 | 450 | return 0; |
be4d1333 MS |
451 | } |
452 | ||
453 | static int | |
d3420b2f MK |
454 | objfile_find_memory_regions (int (*func) (CORE_ADDR, unsigned long, |
455 | int, int, int, void *), | |
be4d1333 MS |
456 | void *obfd) |
457 | { | |
d3420b2f | 458 | /* Use objfile data to create memory sections. */ |
be4d1333 MS |
459 | struct objfile *objfile; |
460 | struct obj_section *objsec; | |
461 | bfd_vma temp_bottom, temp_top; | |
462 | ||
d3420b2f | 463 | /* Call callback function for each objfile section. */ |
be4d1333 MS |
464 | ALL_OBJSECTIONS (objfile, objsec) |
465 | { | |
466 | bfd *ibfd = objfile->obfd; | |
467 | asection *isec = objsec->the_bfd_section; | |
468 | flagword flags = bfd_get_section_flags (ibfd, isec); | |
469 | int ret; | |
470 | ||
471 | if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) | |
472 | { | |
473 | int size = bfd_section_size (ibfd, isec); | |
474 | int ret; | |
475 | ||
f1f6aadf | 476 | ret = (*func) (obj_section_addr (objsec), bfd_section_size (ibfd, isec), |
d3420b2f MK |
477 | 1, /* All sections will be readable. */ |
478 | (flags & SEC_READONLY) == 0, /* Writable. */ | |
479 | (flags & SEC_CODE) != 0, /* Executable. */ | |
480 | obfd); | |
481 | if (ret != 0) | |
be4d1333 MS |
482 | return ret; |
483 | } | |
484 | } | |
485 | ||
d3420b2f | 486 | /* Make a stack segment. */ |
be4d1333 | 487 | if (derive_stack_segment (&temp_bottom, &temp_top)) |
cbb83bd1 | 488 | (*func) (temp_bottom, temp_top - temp_bottom, |
d3420b2f MK |
489 | 1, /* Stack section will be readable. */ |
490 | 1, /* Stack section will be writable. */ | |
491 | 0, /* Stack section will not be executable. */ | |
be4d1333 MS |
492 | obfd); |
493 | ||
494 | /* Make a heap segment. */ | |
495 | if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top)) | |
d3420b2f MK |
496 | (*func) (temp_bottom, temp_top - temp_bottom, |
497 | 1, /* Heap section will be readable. */ | |
498 | 1, /* Heap section will be writable. */ | |
499 | 0, /* Heap section will not be executable. */ | |
be4d1333 | 500 | obfd); |
d3420b2f | 501 | |
be4d1333 MS |
502 | return 0; |
503 | } | |
504 | ||
505 | static void | |
506 | gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) | |
507 | { | |
804e0f53 DJ |
508 | bfd_size_type size, total_size = bfd_section_size (obfd, osec); |
509 | file_ptr offset = 0; | |
be4d1333 MS |
510 | struct cleanup *old_chain = NULL; |
511 | void *memhunk; | |
512 | ||
cbb83bd1 RM |
513 | /* Read-only sections are marked; we don't have to copy their contents. */ |
514 | if ((bfd_get_section_flags (obfd, osec) & SEC_LOAD) == 0) | |
d3420b2f MK |
515 | return; |
516 | ||
517 | /* Only interested in "load" sections. */ | |
20fe79c8 | 518 | if (strncmp ("load", bfd_section_name (obfd, osec), 4) != 0) |
d3420b2f | 519 | return; |
be4d1333 | 520 | |
804e0f53 | 521 | size = min (total_size, MAX_COPY_BYTES); |
d3420b2f MK |
522 | memhunk = xmalloc (size); |
523 | /* ??? This is crap since xmalloc should never return NULL. */ | |
524 | if (memhunk == NULL) | |
8a3fe4f8 | 525 | error (_("Not enough memory to create corefile.")); |
be4d1333 MS |
526 | old_chain = make_cleanup (xfree, memhunk); |
527 | ||
804e0f53 DJ |
528 | while (total_size > 0) |
529 | { | |
530 | if (size > total_size) | |
531 | size = total_size; | |
532 | ||
533 | if (target_read_memory (bfd_section_vma (obfd, osec) + offset, | |
534 | memhunk, size) != 0) | |
535 | { | |
5af949e3 UW |
536 | warning (_("Memory read failed for corefile section, %s bytes at %s."), |
537 | plongest (size), | |
538 | paddress (target_gdbarch, bfd_section_vma (obfd, osec))); | |
804e0f53 DJ |
539 | break; |
540 | } | |
541 | if (!bfd_set_section_contents (obfd, osec, memhunk, offset, size)) | |
542 | { | |
543 | warning (_("Failed to write corefile contents (%s)."), | |
544 | bfd_errmsg (bfd_get_error ())); | |
545 | break; | |
546 | } | |
547 | ||
548 | total_size -= size; | |
549 | offset += size; | |
550 | } | |
be4d1333 | 551 | |
d3420b2f | 552 | do_cleanups (old_chain); /* Frees MEMHUNK. */ |
be4d1333 MS |
553 | } |
554 | ||
555 | static int | |
556 | gcore_memory_sections (bfd *obfd) | |
557 | { | |
558 | if (target_find_memory_regions (gcore_create_callback, obfd) != 0) | |
d3420b2f | 559 | return 0; /* FIXME: error return/msg? */ |
be4d1333 | 560 | |
d3420b2f | 561 | /* Record phdrs for section-to-segment mapping. */ |
be4d1333 MS |
562 | bfd_map_over_sections (obfd, make_output_phdrs, NULL); |
563 | ||
d3420b2f | 564 | /* Copy memory region contents. */ |
be4d1333 MS |
565 | bfd_map_over_sections (obfd, gcore_copy_callback, NULL); |
566 | ||
d3420b2f | 567 | return 1; |
be4d1333 MS |
568 | } |
569 | ||
2c0b251b PA |
570 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
571 | extern initialize_file_ftype _initialize_gcore; | |
572 | ||
be4d1333 MS |
573 | void |
574 | _initialize_gcore (void) | |
575 | { | |
1bedd215 | 576 | add_com ("generate-core-file", class_files, gcore_command, _("\ |
d3420b2f | 577 | Save a core file with the current state of the debugged process.\n\ |
1bedd215 | 578 | Argument is optional filename. Default filename is 'core.<process_id>'.")); |
be4d1333 MS |
579 | |
580 | add_com_alias ("gcore", "generate-core-file", class_files, 1); | |
581 | exec_set_find_memory_regions (objfile_find_memory_regions); | |
582 | } |