Commit | Line | Data |
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be4d1333 | 1 | /* Generate a core file for the inferior process. |
1bac305b | 2 | |
0b302171 | 3 | Copyright (C) 2001-2012 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" |
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 ()); |
d8734c88 | 54 | |
d3420b2f | 55 | if (!obfd) |
0156b218 | 56 | error (_("Failed to open '%s' for output."), filename); |
be4d1333 MS |
57 | bfd_set_format (obfd, bfd_core); |
58 | bfd_set_arch_mach (obfd, default_gcore_arch (), default_gcore_mach ()); | |
0156b218 MS |
59 | return obfd; |
60 | } | |
61 | ||
62 | /* write_gcore_file -- helper for gcore_command (exported). | |
63 | Compose and write the corefile data to the core file. */ | |
64 | ||
65 | ||
66 | void | |
67 | write_gcore_file (bfd *obfd) | |
68 | { | |
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. */ | |
77 | if (!gdbarch_make_corefile_notes_p (target_gdbarch)) | |
78 | note_data = target_make_corefile_notes (obfd, ¬e_size); | |
79 | else | |
80 | note_data = gdbarch_make_corefile_notes (target_gdbarch, obfd, ¬e_size); | |
81 | ||
82 | if (note_data == NULL || note_size == 0) | |
83 | error (_("Target does not support core file generation.")); | |
be4d1333 | 84 | |
d3420b2f | 85 | /* Create the note section. */ |
6432734d UW |
86 | note_sec = bfd_make_section_anyway_with_flags (obfd, "note0", |
87 | SEC_HAS_CONTENTS | |
88 | | SEC_READONLY | |
89 | | SEC_ALLOC); | |
90 | if (note_sec == NULL) | |
91 | error (_("Failed to create 'note' section for corefile: %s"), | |
92 | bfd_errmsg (bfd_get_error ())); | |
93 | ||
94 | bfd_set_section_vma (obfd, note_sec, 0); | |
95 | bfd_set_section_alignment (obfd, note_sec, 0); | |
96 | bfd_set_section_size (obfd, note_sec, note_size); | |
be4d1333 | 97 | |
d3420b2f | 98 | /* Now create the memory/load sections. */ |
be4d1333 | 99 | if (gcore_memory_sections (obfd) == 0) |
8a3fe4f8 | 100 | error (_("gcore: failed to get corefile memory sections from target.")); |
be4d1333 | 101 | |
d3420b2f | 102 | /* Write out the contents of the note section. */ |
6432734d UW |
103 | if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size)) |
104 | warning (_("writing note section (%s)"), bfd_errmsg (bfd_get_error ())); | |
0156b218 MS |
105 | } |
106 | ||
14d1346b DJ |
107 | static void |
108 | do_bfd_delete_cleanup (void *arg) | |
109 | { | |
110 | bfd *obfd = arg; | |
111 | const char *filename = obfd->filename; | |
112 | ||
113 | bfd_close (arg); | |
114 | unlink (filename); | |
115 | } | |
116 | ||
0156b218 MS |
117 | /* gcore_command -- implements the 'gcore' command. |
118 | Generate a core file from the inferior process. */ | |
119 | ||
120 | static void | |
121 | gcore_command (char *args, int from_tty) | |
122 | { | |
123 | struct cleanup *old_chain; | |
124 | char *corefilename, corefilename_buffer[40]; | |
125 | bfd *obfd; | |
126 | ||
127 | /* No use generating a corefile without a target process. */ | |
128 | if (!target_has_execution) | |
129 | noprocess (); | |
130 | ||
131 | if (args && *args) | |
132 | corefilename = args; | |
133 | else | |
134 | { | |
135 | /* Default corefile name is "core.PID". */ | |
136 | sprintf (corefilename_buffer, "core.%d", PIDGET (inferior_ptid)); | |
137 | corefilename = corefilename_buffer; | |
be4d1333 MS |
138 | } |
139 | ||
0156b218 MS |
140 | if (info_verbose) |
141 | fprintf_filtered (gdb_stdout, | |
142 | "Opening corefile '%s' for output.\n", corefilename); | |
143 | ||
144 | /* Open the output file. */ | |
145 | obfd = create_gcore_bfd (corefilename); | |
146 | ||
14d1346b DJ |
147 | /* Need a cleanup that will close and delete the file. */ |
148 | old_chain = make_cleanup (do_bfd_delete_cleanup, obfd); | |
0156b218 MS |
149 | |
150 | /* Call worker function. */ | |
151 | write_gcore_file (obfd); | |
152 | ||
d3420b2f MK |
153 | /* Succeeded. */ |
154 | fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename); | |
be4d1333 | 155 | |
14d1346b DJ |
156 | discard_cleanups (old_chain); |
157 | bfd_close (obfd); | |
be4d1333 MS |
158 | } |
159 | ||
160 | static unsigned long | |
161 | default_gcore_mach (void) | |
162 | { | |
d3420b2f | 163 | #if 1 /* See if this even matters... */ |
6dbdc4a3 MS |
164 | return 0; |
165 | #else | |
1143fffb | 166 | |
a78c2d62 | 167 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch); |
be4d1333 MS |
168 | |
169 | if (bfdarch != NULL) | |
170 | return bfdarch->mach; | |
be4d1333 | 171 | if (exec_bfd == NULL) |
8a3fe4f8 | 172 | error (_("Can't find default bfd machine type (need execfile).")); |
be4d1333 MS |
173 | |
174 | return bfd_get_mach (exec_bfd); | |
6dbdc4a3 | 175 | #endif /* 1 */ |
be4d1333 MS |
176 | } |
177 | ||
178 | static enum bfd_architecture | |
179 | default_gcore_arch (void) | |
180 | { | |
a78c2d62 | 181 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch); |
be4d1333 MS |
182 | |
183 | if (bfdarch != NULL) | |
184 | return bfdarch->arch; | |
be4d1333 | 185 | if (exec_bfd == NULL) |
8a3fe4f8 | 186 | error (_("Can't find bfd architecture for corefile (need execfile).")); |
be4d1333 MS |
187 | |
188 | return bfd_get_arch (exec_bfd); | |
189 | } | |
190 | ||
a78c2d62 | 191 | static const char * |
be4d1333 MS |
192 | default_gcore_target (void) |
193 | { | |
a78c2d62 UW |
194 | /* The gdbarch may define a target to use for core files. */ |
195 | if (gdbarch_gcore_bfd_target_p (target_gdbarch)) | |
196 | return gdbarch_gcore_bfd_target (target_gdbarch); | |
197 | ||
198 | /* Otherwise, try to fall back to the exec_bfd target. This will probably | |
199 | not work for non-ELF targets. */ | |
be4d1333 | 200 | if (exec_bfd == NULL) |
6dbdc4a3 MS |
201 | return NULL; |
202 | else | |
203 | return bfd_get_target (exec_bfd); | |
be4d1333 MS |
204 | } |
205 | ||
d3420b2f MK |
206 | /* Derive a reasonable stack segment by unwinding the target stack, |
207 | and store its limits in *BOTTOM and *TOP. Return non-zero if | |
208 | successful. */ | |
be4d1333 | 209 | |
cbb83bd1 | 210 | static int |
69db8bae | 211 | derive_stack_segment (bfd_vma *bottom, bfd_vma *top) |
be4d1333 | 212 | { |
be4d1333 MS |
213 | struct frame_info *fi, *tmp_fi; |
214 | ||
d3420b2f MK |
215 | gdb_assert (bottom); |
216 | gdb_assert (top); | |
be4d1333 | 217 | |
d3420b2f | 218 | /* Can't succeed without stack and registers. */ |
be4d1333 | 219 | if (!target_has_stack || !target_has_registers) |
d3420b2f | 220 | return 0; |
be4d1333 | 221 | |
d3420b2f MK |
222 | /* Can't succeed without current frame. */ |
223 | fi = get_current_frame (); | |
224 | if (fi == NULL) | |
225 | return 0; | |
be4d1333 | 226 | |
d3420b2f | 227 | /* Save frame pointer of TOS frame. */ |
8d357cca | 228 | *top = get_frame_base (fi); |
d3420b2f | 229 | /* If current stack pointer is more "inner", use that instead. */ |
40a6adc1 | 230 | if (gdbarch_inner_than (get_frame_arch (fi), get_frame_sp (fi), *top)) |
fb4443d8 | 231 | *top = get_frame_sp (fi); |
be4d1333 | 232 | |
d3420b2f | 233 | /* Find prev-most frame. */ |
be4d1333 MS |
234 | while ((tmp_fi = get_prev_frame (fi)) != NULL) |
235 | fi = tmp_fi; | |
236 | ||
d3420b2f | 237 | /* Save frame pointer of prev-most frame. */ |
8d357cca | 238 | *bottom = get_frame_base (fi); |
be4d1333 | 239 | |
d3420b2f MK |
240 | /* Now canonicalize their order, so that BOTTOM is a lower address |
241 | (as opposed to a lower stack frame). */ | |
be4d1333 MS |
242 | if (*bottom > *top) |
243 | { | |
d3420b2f MK |
244 | bfd_vma tmp_vma; |
245 | ||
be4d1333 MS |
246 | tmp_vma = *top; |
247 | *top = *bottom; | |
248 | *bottom = tmp_vma; | |
249 | } | |
250 | ||
d3420b2f | 251 | return 1; |
be4d1333 MS |
252 | } |
253 | ||
0156b218 MS |
254 | /* call_target_sbrk -- |
255 | helper function for derive_heap_segment. */ | |
256 | ||
257 | static bfd_vma | |
258 | call_target_sbrk (int sbrk_arg) | |
259 | { | |
260 | struct objfile *sbrk_objf; | |
261 | struct gdbarch *gdbarch; | |
262 | bfd_vma top_of_heap; | |
263 | struct value *target_sbrk_arg; | |
264 | struct value *sbrk_fn, *ret; | |
265 | bfd_vma tmp; | |
266 | ||
267 | if (lookup_minimal_symbol ("sbrk", NULL, NULL) != NULL) | |
268 | { | |
269 | sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf); | |
270 | if (sbrk_fn == NULL) | |
271 | return (bfd_vma) 0; | |
272 | } | |
273 | else if (lookup_minimal_symbol ("_sbrk", NULL, NULL) != NULL) | |
274 | { | |
275 | sbrk_fn = find_function_in_inferior ("_sbrk", &sbrk_objf); | |
276 | if (sbrk_fn == NULL) | |
277 | return (bfd_vma) 0; | |
278 | } | |
279 | else | |
280 | return (bfd_vma) 0; | |
281 | ||
282 | gdbarch = get_objfile_arch (sbrk_objf); | |
283 | target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
284 | sbrk_arg); | |
285 | gdb_assert (target_sbrk_arg); | |
286 | ret = call_function_by_hand (sbrk_fn, 1, &target_sbrk_arg); | |
287 | if (ret == NULL) | |
288 | return (bfd_vma) 0; | |
289 | ||
290 | tmp = value_as_long (ret); | |
291 | if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff) | |
292 | return (bfd_vma) 0; | |
293 | ||
294 | top_of_heap = tmp; | |
295 | return top_of_heap; | |
296 | } | |
297 | ||
d3420b2f MK |
298 | /* Derive a reasonable heap segment for ABFD by looking at sbrk and |
299 | the static data sections. Store its limits in *BOTTOM and *TOP. | |
300 | Return non-zero if successful. */ | |
be4d1333 | 301 | |
cbb83bd1 | 302 | static int |
69db8bae | 303 | derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) |
be4d1333 MS |
304 | { |
305 | bfd_vma top_of_data_memory = 0; | |
306 | bfd_vma top_of_heap = 0; | |
307 | bfd_size_type sec_size; | |
be4d1333 MS |
308 | bfd_vma sec_vaddr; |
309 | asection *sec; | |
310 | ||
d3420b2f MK |
311 | gdb_assert (bottom); |
312 | gdb_assert (top); | |
be4d1333 | 313 | |
d3420b2f MK |
314 | /* This function depends on being able to call a function in the |
315 | inferior. */ | |
be4d1333 | 316 | if (!target_has_execution) |
d3420b2f MK |
317 | return 0; |
318 | ||
319 | /* The following code assumes that the link map is arranged as | |
320 | follows (low to high addresses): | |
be4d1333 | 321 | |
d3420b2f MK |
322 | --------------------------------- |
323 | | text sections | | |
324 | --------------------------------- | |
325 | | data sections (including bss) | | |
326 | --------------------------------- | |
327 | | heap | | |
328 | --------------------------------- */ | |
be4d1333 MS |
329 | |
330 | for (sec = abfd->sections; sec; sec = sec->next) | |
331 | { | |
d3420b2f MK |
332 | if (bfd_get_section_flags (abfd, sec) & SEC_DATA |
333 | || strcmp (".bss", bfd_section_name (abfd, sec)) == 0) | |
be4d1333 MS |
334 | { |
335 | sec_vaddr = bfd_get_section_vma (abfd, sec); | |
2c500098 | 336 | sec_size = bfd_get_section_size (sec); |
be4d1333 MS |
337 | if (sec_vaddr + sec_size > top_of_data_memory) |
338 | top_of_data_memory = sec_vaddr + sec_size; | |
339 | } | |
340 | } | |
d3420b2f | 341 | |
0156b218 MS |
342 | top_of_heap = call_target_sbrk (0); |
343 | if (top_of_heap == (bfd_vma) 0) | |
be4d1333 | 344 | return 0; |
be4d1333 | 345 | |
d3420b2f | 346 | /* Return results. */ |
be4d1333 MS |
347 | if (top_of_heap > top_of_data_memory) |
348 | { | |
349 | *bottom = top_of_data_memory; | |
350 | *top = top_of_heap; | |
d3420b2f | 351 | return 1; |
be4d1333 | 352 | } |
d3420b2f MK |
353 | |
354 | /* No additional heap space needs to be saved. */ | |
355 | return 0; | |
be4d1333 MS |
356 | } |
357 | ||
be4d1333 MS |
358 | static void |
359 | make_output_phdrs (bfd *obfd, asection *osec, void *ignored) | |
360 | { | |
361 | int p_flags = 0; | |
0156b218 | 362 | int p_type = 0; |
be4d1333 MS |
363 | |
364 | /* FIXME: these constants may only be applicable for ELF. */ | |
20fe79c8 | 365 | if (strncmp (bfd_section_name (obfd, osec), "load", 4) == 0) |
be4d1333 | 366 | p_type = PT_LOAD; |
0156b218 | 367 | else if (strncmp (bfd_section_name (obfd, osec), "note", 4) == 0) |
be4d1333 | 368 | p_type = PT_NOTE; |
0156b218 MS |
369 | else |
370 | p_type = PT_NULL; | |
be4d1333 MS |
371 | |
372 | p_flags |= PF_R; /* Segment is readable. */ | |
373 | if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY)) | |
374 | p_flags |= PF_W; /* Segment is writable. */ | |
375 | if (bfd_get_section_flags (obfd, osec) & SEC_CODE) | |
376 | p_flags |= PF_X; /* Segment is executable. */ | |
377 | ||
d3420b2f | 378 | bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, 0, 0, 1, &osec); |
be4d1333 MS |
379 | } |
380 | ||
cbb83bd1 RM |
381 | static int |
382 | gcore_create_callback (CORE_ADDR vaddr, unsigned long size, | |
383 | int read, int write, int exec, void *data) | |
be4d1333 | 384 | { |
cbb83bd1 | 385 | bfd *obfd = data; |
be4d1333 | 386 | asection *osec; |
cbb83bd1 RM |
387 | flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD; |
388 | ||
86fbe6cc EZ |
389 | /* If the memory segment has no permissions set, ignore it, otherwise |
390 | when we later try to access it for read/write, we'll get an error | |
391 | or jam the kernel. */ | |
392 | if (read == 0 && write == 0 && exec == 0) | |
393 | { | |
394 | if (info_verbose) | |
395 | { | |
5af949e3 UW |
396 | fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at %s\n", |
397 | plongest (size), paddress (target_gdbarch, vaddr)); | |
86fbe6cc EZ |
398 | } |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
de18c1d8 | 403 | if (write == 0 && !solib_keep_data_in_core (vaddr, size)) |
cbb83bd1 RM |
404 | { |
405 | /* See if this region of memory lies inside a known file on disk. | |
406 | If so, we can avoid copying its contents by clearing SEC_LOAD. */ | |
407 | struct objfile *objfile; | |
408 | struct obj_section *objsec; | |
409 | ||
410 | ALL_OBJSECTIONS (objfile, objsec) | |
411 | { | |
412 | bfd *abfd = objfile->obfd; | |
413 | asection *asec = objsec->the_bfd_section; | |
414 | bfd_vma align = (bfd_vma) 1 << bfd_get_section_alignment (abfd, | |
415 | asec); | |
f1f6aadf PA |
416 | bfd_vma start = obj_section_addr (objsec) & -align; |
417 | bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align; | |
d8734c88 | 418 | |
cbb83bd1 RM |
419 | /* Match if either the entire memory region lies inside the |
420 | section (i.e. a mapping covering some pages of a large | |
421 | segment) or the entire section lies inside the memory region | |
422 | (i.e. a mapping covering multiple small sections). | |
423 | ||
424 | This BFD was synthesized from reading target memory, | |
425 | we don't want to omit that. */ | |
426 | if (((vaddr >= start && vaddr + size <= end) | |
427 | || (start >= vaddr && end <= vaddr + size)) | |
428 | && !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY)) | |
429 | { | |
349126ea | 430 | flags &= ~(SEC_LOAD | SEC_HAS_CONTENTS); |
0963b4bd | 431 | goto keep; /* Break out of two nested for loops. */ |
cbb83bd1 RM |
432 | } |
433 | } | |
434 | ||
435 | keep: | |
436 | flags |= SEC_READONLY; | |
437 | } | |
438 | ||
439 | if (exec) | |
440 | flags |= SEC_CODE; | |
441 | else | |
442 | flags |= SEC_DATA; | |
be4d1333 | 443 | |
52b57208 | 444 | osec = bfd_make_section_anyway_with_flags (obfd, "load", flags); |
d3420b2f | 445 | if (osec == NULL) |
be4d1333 | 446 | { |
8a3fe4f8 | 447 | warning (_("Couldn't make gcore segment: %s"), |
be4d1333 | 448 | bfd_errmsg (bfd_get_error ())); |
cbb83bd1 | 449 | return 1; |
be4d1333 MS |
450 | } |
451 | ||
452 | if (info_verbose) | |
453 | { | |
5af949e3 UW |
454 | fprintf_filtered (gdb_stdout, "Save segment, %s bytes at %s\n", |
455 | plongest (size), paddress (target_gdbarch, vaddr)); | |
be4d1333 MS |
456 | } |
457 | ||
458 | bfd_set_section_size (obfd, osec, size); | |
cbb83bd1 | 459 | bfd_set_section_vma (obfd, osec, vaddr); |
d3420b2f | 460 | bfd_section_lma (obfd, osec) = 0; /* ??? bfd_set_section_lma? */ |
cbb83bd1 | 461 | return 0; |
be4d1333 MS |
462 | } |
463 | ||
464 | static int | |
b8edc417 | 465 | objfile_find_memory_regions (find_memory_region_ftype func, void *obfd) |
be4d1333 | 466 | { |
d3420b2f | 467 | /* Use objfile data to create memory sections. */ |
be4d1333 MS |
468 | struct objfile *objfile; |
469 | struct obj_section *objsec; | |
470 | bfd_vma temp_bottom, temp_top; | |
471 | ||
d3420b2f | 472 | /* Call callback function for each objfile section. */ |
be4d1333 MS |
473 | ALL_OBJSECTIONS (objfile, objsec) |
474 | { | |
475 | bfd *ibfd = objfile->obfd; | |
476 | asection *isec = objsec->the_bfd_section; | |
477 | flagword flags = bfd_get_section_flags (ibfd, isec); | |
be4d1333 MS |
478 | |
479 | if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) | |
480 | { | |
481 | int size = bfd_section_size (ibfd, isec); | |
482 | int ret; | |
483 | ||
c6913b7d | 484 | ret = (*func) (obj_section_addr (objsec), size, |
d3420b2f MK |
485 | 1, /* All sections will be readable. */ |
486 | (flags & SEC_READONLY) == 0, /* Writable. */ | |
487 | (flags & SEC_CODE) != 0, /* Executable. */ | |
488 | obfd); | |
489 | if (ret != 0) | |
be4d1333 MS |
490 | return ret; |
491 | } | |
492 | } | |
493 | ||
d3420b2f | 494 | /* Make a stack segment. */ |
be4d1333 | 495 | if (derive_stack_segment (&temp_bottom, &temp_top)) |
cbb83bd1 | 496 | (*func) (temp_bottom, temp_top - temp_bottom, |
d3420b2f MK |
497 | 1, /* Stack section will be readable. */ |
498 | 1, /* Stack section will be writable. */ | |
499 | 0, /* Stack section will not be executable. */ | |
be4d1333 MS |
500 | obfd); |
501 | ||
0963b4bd | 502 | /* Make a heap segment. */ |
be4d1333 | 503 | if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top)) |
d3420b2f MK |
504 | (*func) (temp_bottom, temp_top - temp_bottom, |
505 | 1, /* Heap section will be readable. */ | |
506 | 1, /* Heap section will be writable. */ | |
507 | 0, /* Heap section will not be executable. */ | |
be4d1333 | 508 | obfd); |
d3420b2f | 509 | |
be4d1333 MS |
510 | return 0; |
511 | } | |
512 | ||
513 | static void | |
514 | gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) | |
515 | { | |
804e0f53 DJ |
516 | bfd_size_type size, total_size = bfd_section_size (obfd, osec); |
517 | file_ptr offset = 0; | |
be4d1333 MS |
518 | struct cleanup *old_chain = NULL; |
519 | void *memhunk; | |
520 | ||
cbb83bd1 RM |
521 | /* Read-only sections are marked; we don't have to copy their contents. */ |
522 | if ((bfd_get_section_flags (obfd, osec) & SEC_LOAD) == 0) | |
d3420b2f MK |
523 | return; |
524 | ||
525 | /* Only interested in "load" sections. */ | |
20fe79c8 | 526 | if (strncmp ("load", bfd_section_name (obfd, osec), 4) != 0) |
d3420b2f | 527 | return; |
be4d1333 | 528 | |
804e0f53 | 529 | size = min (total_size, MAX_COPY_BYTES); |
d3420b2f | 530 | memhunk = xmalloc (size); |
be4d1333 MS |
531 | old_chain = make_cleanup (xfree, memhunk); |
532 | ||
804e0f53 DJ |
533 | while (total_size > 0) |
534 | { | |
535 | if (size > total_size) | |
536 | size = total_size; | |
537 | ||
538 | if (target_read_memory (bfd_section_vma (obfd, osec) + offset, | |
539 | memhunk, size) != 0) | |
540 | { | |
3e43a32a MS |
541 | warning (_("Memory read failed for corefile " |
542 | "section, %s bytes at %s."), | |
5af949e3 UW |
543 | plongest (size), |
544 | paddress (target_gdbarch, bfd_section_vma (obfd, osec))); | |
804e0f53 DJ |
545 | break; |
546 | } | |
547 | if (!bfd_set_section_contents (obfd, osec, memhunk, offset, size)) | |
548 | { | |
549 | warning (_("Failed to write corefile contents (%s)."), | |
550 | bfd_errmsg (bfd_get_error ())); | |
551 | break; | |
552 | } | |
553 | ||
554 | total_size -= size; | |
555 | offset += size; | |
556 | } | |
be4d1333 | 557 | |
d3420b2f | 558 | do_cleanups (old_chain); /* Frees MEMHUNK. */ |
be4d1333 MS |
559 | } |
560 | ||
561 | static int | |
562 | gcore_memory_sections (bfd *obfd) | |
563 | { | |
35c2fab7 UW |
564 | /* Try gdbarch method first, then fall back to target method. */ |
565 | if (!gdbarch_find_memory_regions_p (target_gdbarch) | |
566 | || gdbarch_find_memory_regions (target_gdbarch, | |
567 | gcore_create_callback, obfd) != 0) | |
568 | { | |
569 | if (target_find_memory_regions (gcore_create_callback, obfd) != 0) | |
570 | return 0; /* FIXME: error return/msg? */ | |
571 | } | |
be4d1333 | 572 | |
d3420b2f | 573 | /* Record phdrs for section-to-segment mapping. */ |
be4d1333 MS |
574 | bfd_map_over_sections (obfd, make_output_phdrs, NULL); |
575 | ||
d3420b2f | 576 | /* Copy memory region contents. */ |
be4d1333 MS |
577 | bfd_map_over_sections (obfd, gcore_copy_callback, NULL); |
578 | ||
d3420b2f | 579 | return 1; |
be4d1333 MS |
580 | } |
581 | ||
2c0b251b PA |
582 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
583 | extern initialize_file_ftype _initialize_gcore; | |
584 | ||
be4d1333 MS |
585 | void |
586 | _initialize_gcore (void) | |
587 | { | |
1bedd215 | 588 | add_com ("generate-core-file", class_files, gcore_command, _("\ |
d3420b2f | 589 | Save a core file with the current state of the debugged process.\n\ |
1bedd215 | 590 | Argument is optional filename. Default filename is 'core.<process_id>'.")); |
be4d1333 MS |
591 | |
592 | add_com_alias ("gcore", "generate-core-file", class_files, 1); | |
593 | exec_set_find_memory_regions (objfile_find_memory_regions); | |
594 | } |