Commit | Line | Data |
---|---|---|
be4d1333 | 1 | /* Generate a core file for the inferior process. |
1bac305b | 2 | |
61baf725 | 3 | Copyright (C) 2001-2017 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> |
bef155c3 | 38 | #include "common/gdb_unlinker.h" |
be4d1333 | 39 | |
804e0f53 DJ |
40 | /* The largest amount of memory to read from the target at once. We |
41 | must throttle it to limit the amount of memory used by GDB during | |
42 | generate-core-file for programs with large resident data. */ | |
43 | #define MAX_COPY_BYTES (1024 * 1024) | |
44 | ||
a78c2d62 | 45 | static const char *default_gcore_target (void); |
d3420b2f MK |
46 | static enum bfd_architecture default_gcore_arch (void); |
47 | static unsigned long default_gcore_mach (void); | |
48 | static int gcore_memory_sections (bfd *); | |
49 | ||
0156b218 MS |
50 | /* create_gcore_bfd -- helper for gcore_command (exported). |
51 | Open a new bfd core file for output, and return the handle. */ | |
be4d1333 | 52 | |
192b62ce | 53 | gdb_bfd_ref_ptr |
85e1311a | 54 | create_gcore_bfd (const char *filename) |
be4d1333 | 55 | { |
192b62ce | 56 | gdb_bfd_ref_ptr obfd (gdb_bfd_openw (filename, default_gcore_target ())); |
d8734c88 | 57 | |
192b62ce | 58 | if (obfd == NULL) |
0156b218 | 59 | error (_("Failed to open '%s' for output."), filename); |
192b62ce TT |
60 | bfd_set_format (obfd.get (), bfd_core); |
61 | bfd_set_arch_mach (obfd.get (), default_gcore_arch (), default_gcore_mach ()); | |
0156b218 MS |
62 | return obfd; |
63 | } | |
64 | ||
5fff78c4 | 65 | /* write_gcore_file_1 -- do the actual work of write_gcore_file. */ |
0156b218 | 66 | |
5fff78c4 MM |
67 | static void |
68 | write_gcore_file_1 (bfd *obfd) | |
0156b218 | 69 | { |
1d1f1ccb | 70 | struct cleanup *cleanup; |
0156b218 MS |
71 | void *note_data = NULL; |
72 | int note_size = 0; | |
73 | asection *note_sec = NULL; | |
be4d1333 | 74 | |
d3420b2f | 75 | /* An external target method must build the notes section. */ |
6432734d UW |
76 | /* FIXME: uweigand/2011-10-06: All architectures that support core file |
77 | generation should be converted to gdbarch_make_corefile_notes; at that | |
78 | point, the target vector method can be removed. */ | |
f5656ead | 79 | if (!gdbarch_make_corefile_notes_p (target_gdbarch ())) |
6432734d UW |
80 | note_data = target_make_corefile_notes (obfd, ¬e_size); |
81 | else | |
f5656ead | 82 | note_data = gdbarch_make_corefile_notes (target_gdbarch (), obfd, ¬e_size); |
6432734d | 83 | |
1d1f1ccb MM |
84 | cleanup = make_cleanup (xfree, note_data); |
85 | ||
6432734d UW |
86 | if (note_data == NULL || note_size == 0) |
87 | error (_("Target does not support core file generation.")); | |
be4d1333 | 88 | |
d3420b2f | 89 | /* Create the note section. */ |
6432734d UW |
90 | note_sec = bfd_make_section_anyway_with_flags (obfd, "note0", |
91 | SEC_HAS_CONTENTS | |
92 | | SEC_READONLY | |
93 | | SEC_ALLOC); | |
94 | if (note_sec == NULL) | |
95 | error (_("Failed to create 'note' section for corefile: %s"), | |
96 | bfd_errmsg (bfd_get_error ())); | |
97 | ||
98 | bfd_set_section_vma (obfd, note_sec, 0); | |
99 | bfd_set_section_alignment (obfd, note_sec, 0); | |
100 | bfd_set_section_size (obfd, note_sec, note_size); | |
be4d1333 | 101 | |
d3420b2f | 102 | /* Now create the memory/load sections. */ |
be4d1333 | 103 | if (gcore_memory_sections (obfd) == 0) |
8a3fe4f8 | 104 | error (_("gcore: failed to get corefile memory sections from target.")); |
be4d1333 | 105 | |
d3420b2f | 106 | /* Write out the contents of the note section. */ |
6432734d UW |
107 | if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size)) |
108 | warning (_("writing note section (%s)"), bfd_errmsg (bfd_get_error ())); | |
1d1f1ccb MM |
109 | |
110 | do_cleanups (cleanup); | |
0156b218 MS |
111 | } |
112 | ||
5fff78c4 MM |
113 | /* write_gcore_file -- helper for gcore_command (exported). |
114 | Compose and write the corefile data to the core file. */ | |
115 | ||
116 | void | |
117 | write_gcore_file (bfd *obfd) | |
118 | { | |
492d29ea | 119 | struct gdb_exception except = exception_none; |
5fff78c4 MM |
120 | |
121 | target_prepare_to_generate_core (); | |
122 | ||
492d29ea PA |
123 | TRY |
124 | { | |
125 | write_gcore_file_1 (obfd); | |
126 | } | |
127 | CATCH (e, RETURN_MASK_ALL) | |
128 | { | |
129 | except = e; | |
130 | } | |
131 | END_CATCH | |
5fff78c4 MM |
132 | |
133 | target_done_generating_core (); | |
134 | ||
135 | if (except.reason < 0) | |
136 | throw_exception (except); | |
137 | } | |
138 | ||
0156b218 MS |
139 | /* gcore_command -- implements the 'gcore' command. |
140 | Generate a core file from the inferior process. */ | |
141 | ||
142 | static void | |
143 | gcore_command (char *args, int from_tty) | |
144 | { | |
bef155c3 | 145 | gdb::unique_xmalloc_ptr<char> corefilename; |
0156b218 MS |
146 | |
147 | /* No use generating a corefile without a target process. */ | |
148 | if (!target_has_execution) | |
149 | noprocess (); | |
150 | ||
151 | if (args && *args) | |
bef155c3 | 152 | corefilename.reset (tilde_expand (args)); |
0156b218 MS |
153 | else |
154 | { | |
155 | /* Default corefile name is "core.PID". */ | |
bef155c3 | 156 | corefilename.reset (xstrprintf ("core.%d", ptid_get_pid (inferior_ptid))); |
be4d1333 MS |
157 | } |
158 | ||
0156b218 MS |
159 | if (info_verbose) |
160 | fprintf_filtered (gdb_stdout, | |
bef155c3 TT |
161 | "Opening corefile '%s' for output.\n", |
162 | corefilename.get ()); | |
0156b218 MS |
163 | |
164 | /* Open the output file. */ | |
bef155c3 | 165 | gdb_bfd_ref_ptr obfd (create_gcore_bfd (corefilename.get ())); |
0156b218 | 166 | |
bef155c3 TT |
167 | /* Arrange to unlink the file on failure. */ |
168 | gdb::unlinker unlink_file (corefilename.get ()); | |
0156b218 MS |
169 | |
170 | /* Call worker function. */ | |
bef155c3 | 171 | write_gcore_file (obfd.get ()); |
0156b218 | 172 | |
d3420b2f | 173 | /* Succeeded. */ |
bef155c3 | 174 | unlink_file.keep (); |
1e351ed1 | 175 | |
bef155c3 | 176 | fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename.get ()); |
be4d1333 MS |
177 | } |
178 | ||
179 | static unsigned long | |
180 | default_gcore_mach (void) | |
181 | { | |
d3420b2f | 182 | #if 1 /* See if this even matters... */ |
6dbdc4a3 MS |
183 | return 0; |
184 | #else | |
1143fffb | 185 | |
f5656ead | 186 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch ()); |
be4d1333 MS |
187 | |
188 | if (bfdarch != NULL) | |
189 | return bfdarch->mach; | |
be4d1333 | 190 | if (exec_bfd == NULL) |
8a3fe4f8 | 191 | error (_("Can't find default bfd machine type (need execfile).")); |
be4d1333 MS |
192 | |
193 | return bfd_get_mach (exec_bfd); | |
6dbdc4a3 | 194 | #endif /* 1 */ |
be4d1333 MS |
195 | } |
196 | ||
197 | static enum bfd_architecture | |
198 | default_gcore_arch (void) | |
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->arch; | |
be4d1333 | 204 | if (exec_bfd == NULL) |
8a3fe4f8 | 205 | error (_("Can't find bfd architecture for corefile (need execfile).")); |
be4d1333 MS |
206 | |
207 | return bfd_get_arch (exec_bfd); | |
208 | } | |
209 | ||
a78c2d62 | 210 | static const char * |
be4d1333 MS |
211 | default_gcore_target (void) |
212 | { | |
a78c2d62 | 213 | /* The gdbarch may define a target to use for core files. */ |
f5656ead TT |
214 | if (gdbarch_gcore_bfd_target_p (target_gdbarch ())) |
215 | return gdbarch_gcore_bfd_target (target_gdbarch ()); | |
a78c2d62 UW |
216 | |
217 | /* Otherwise, try to fall back to the exec_bfd target. This will probably | |
218 | not work for non-ELF targets. */ | |
be4d1333 | 219 | if (exec_bfd == NULL) |
6dbdc4a3 MS |
220 | return NULL; |
221 | else | |
222 | return bfd_get_target (exec_bfd); | |
be4d1333 MS |
223 | } |
224 | ||
d3420b2f MK |
225 | /* Derive a reasonable stack segment by unwinding the target stack, |
226 | and store its limits in *BOTTOM and *TOP. Return non-zero if | |
227 | successful. */ | |
be4d1333 | 228 | |
cbb83bd1 | 229 | static int |
69db8bae | 230 | derive_stack_segment (bfd_vma *bottom, bfd_vma *top) |
be4d1333 | 231 | { |
be4d1333 MS |
232 | struct frame_info *fi, *tmp_fi; |
233 | ||
d3420b2f MK |
234 | gdb_assert (bottom); |
235 | gdb_assert (top); | |
be4d1333 | 236 | |
d3420b2f | 237 | /* Can't succeed without stack and registers. */ |
be4d1333 | 238 | if (!target_has_stack || !target_has_registers) |
d3420b2f | 239 | return 0; |
be4d1333 | 240 | |
d3420b2f MK |
241 | /* Can't succeed without current frame. */ |
242 | fi = get_current_frame (); | |
243 | if (fi == NULL) | |
244 | return 0; | |
be4d1333 | 245 | |
d3420b2f | 246 | /* Save frame pointer of TOS frame. */ |
8d357cca | 247 | *top = get_frame_base (fi); |
d3420b2f | 248 | /* If current stack pointer is more "inner", use that instead. */ |
40a6adc1 | 249 | if (gdbarch_inner_than (get_frame_arch (fi), get_frame_sp (fi), *top)) |
fb4443d8 | 250 | *top = get_frame_sp (fi); |
be4d1333 | 251 | |
d3420b2f | 252 | /* Find prev-most frame. */ |
be4d1333 MS |
253 | while ((tmp_fi = get_prev_frame (fi)) != NULL) |
254 | fi = tmp_fi; | |
255 | ||
d3420b2f | 256 | /* Save frame pointer of prev-most frame. */ |
8d357cca | 257 | *bottom = get_frame_base (fi); |
be4d1333 | 258 | |
d3420b2f MK |
259 | /* Now canonicalize their order, so that BOTTOM is a lower address |
260 | (as opposed to a lower stack frame). */ | |
be4d1333 MS |
261 | if (*bottom > *top) |
262 | { | |
d3420b2f MK |
263 | bfd_vma tmp_vma; |
264 | ||
be4d1333 MS |
265 | tmp_vma = *top; |
266 | *top = *bottom; | |
267 | *bottom = tmp_vma; | |
268 | } | |
269 | ||
d3420b2f | 270 | return 1; |
be4d1333 MS |
271 | } |
272 | ||
0156b218 MS |
273 | /* call_target_sbrk -- |
274 | helper function for derive_heap_segment. */ | |
275 | ||
276 | static bfd_vma | |
277 | call_target_sbrk (int sbrk_arg) | |
278 | { | |
279 | struct objfile *sbrk_objf; | |
280 | struct gdbarch *gdbarch; | |
281 | bfd_vma top_of_heap; | |
282 | struct value *target_sbrk_arg; | |
283 | struct value *sbrk_fn, *ret; | |
284 | bfd_vma tmp; | |
285 | ||
3b7344d5 | 286 | if (lookup_minimal_symbol ("sbrk", NULL, NULL).minsym != NULL) |
0156b218 MS |
287 | { |
288 | sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf); | |
289 | if (sbrk_fn == NULL) | |
290 | return (bfd_vma) 0; | |
291 | } | |
3b7344d5 | 292 | else 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 | } | |
298 | else | |
299 | return (bfd_vma) 0; | |
300 | ||
301 | gdbarch = get_objfile_arch (sbrk_objf); | |
302 | target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
303 | sbrk_arg); | |
304 | gdb_assert (target_sbrk_arg); | |
305 | ret = call_function_by_hand (sbrk_fn, 1, &target_sbrk_arg); | |
306 | if (ret == NULL) | |
307 | return (bfd_vma) 0; | |
308 | ||
309 | tmp = value_as_long (ret); | |
310 | if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff) | |
311 | return (bfd_vma) 0; | |
312 | ||
313 | top_of_heap = tmp; | |
314 | return top_of_heap; | |
315 | } | |
316 | ||
d3420b2f MK |
317 | /* Derive a reasonable heap segment for ABFD by looking at sbrk and |
318 | the static data sections. Store its limits in *BOTTOM and *TOP. | |
319 | Return non-zero if successful. */ | |
be4d1333 | 320 | |
cbb83bd1 | 321 | static int |
69db8bae | 322 | derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) |
be4d1333 MS |
323 | { |
324 | bfd_vma top_of_data_memory = 0; | |
325 | bfd_vma top_of_heap = 0; | |
326 | bfd_size_type sec_size; | |
be4d1333 MS |
327 | bfd_vma sec_vaddr; |
328 | asection *sec; | |
329 | ||
d3420b2f MK |
330 | gdb_assert (bottom); |
331 | gdb_assert (top); | |
be4d1333 | 332 | |
d3420b2f MK |
333 | /* This function depends on being able to call a function in the |
334 | inferior. */ | |
be4d1333 | 335 | if (!target_has_execution) |
d3420b2f MK |
336 | return 0; |
337 | ||
338 | /* The following code assumes that the link map is arranged as | |
339 | follows (low to high addresses): | |
be4d1333 | 340 | |
d3420b2f MK |
341 | --------------------------------- |
342 | | text sections | | |
343 | --------------------------------- | |
344 | | data sections (including bss) | | |
345 | --------------------------------- | |
346 | | heap | | |
347 | --------------------------------- */ | |
be4d1333 MS |
348 | |
349 | for (sec = abfd->sections; sec; sec = sec->next) | |
350 | { | |
d3420b2f MK |
351 | if (bfd_get_section_flags (abfd, sec) & SEC_DATA |
352 | || strcmp (".bss", bfd_section_name (abfd, sec)) == 0) | |
be4d1333 MS |
353 | { |
354 | sec_vaddr = bfd_get_section_vma (abfd, sec); | |
2c500098 | 355 | sec_size = bfd_get_section_size (sec); |
be4d1333 MS |
356 | if (sec_vaddr + sec_size > top_of_data_memory) |
357 | top_of_data_memory = sec_vaddr + sec_size; | |
358 | } | |
359 | } | |
d3420b2f | 360 | |
0156b218 MS |
361 | top_of_heap = call_target_sbrk (0); |
362 | if (top_of_heap == (bfd_vma) 0) | |
be4d1333 | 363 | return 0; |
be4d1333 | 364 | |
d3420b2f | 365 | /* Return results. */ |
be4d1333 MS |
366 | if (top_of_heap > top_of_data_memory) |
367 | { | |
368 | *bottom = top_of_data_memory; | |
369 | *top = top_of_heap; | |
d3420b2f | 370 | return 1; |
be4d1333 | 371 | } |
d3420b2f MK |
372 | |
373 | /* No additional heap space needs to be saved. */ | |
374 | return 0; | |
be4d1333 MS |
375 | } |
376 | ||
be4d1333 MS |
377 | static void |
378 | make_output_phdrs (bfd *obfd, asection *osec, void *ignored) | |
379 | { | |
380 | int p_flags = 0; | |
0156b218 | 381 | int p_type = 0; |
be4d1333 MS |
382 | |
383 | /* FIXME: these constants may only be applicable for ELF. */ | |
61012eef | 384 | if (startswith (bfd_section_name (obfd, osec), "load")) |
be4d1333 | 385 | p_type = PT_LOAD; |
61012eef | 386 | else if (startswith (bfd_section_name (obfd, osec), "note")) |
be4d1333 | 387 | p_type = PT_NOTE; |
0156b218 MS |
388 | else |
389 | p_type = PT_NULL; | |
be4d1333 MS |
390 | |
391 | p_flags |= PF_R; /* Segment is readable. */ | |
392 | if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY)) | |
393 | p_flags |= PF_W; /* Segment is writable. */ | |
394 | if (bfd_get_section_flags (obfd, osec) & SEC_CODE) | |
395 | p_flags |= PF_X; /* Segment is executable. */ | |
396 | ||
d3420b2f | 397 | bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, 0, 0, 1, &osec); |
be4d1333 MS |
398 | } |
399 | ||
4f69f4c2 JK |
400 | /* find_memory_region_ftype implementation. DATA is 'bfd *' for the core file |
401 | GDB is creating. */ | |
402 | ||
cbb83bd1 | 403 | static int |
4f69f4c2 JK |
404 | gcore_create_callback (CORE_ADDR vaddr, unsigned long size, int read, |
405 | int write, int exec, int modified, void *data) | |
be4d1333 | 406 | { |
9a3c8263 | 407 | bfd *obfd = (bfd *) data; |
be4d1333 | 408 | asection *osec; |
cbb83bd1 RM |
409 | flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD; |
410 | ||
86fbe6cc EZ |
411 | /* If the memory segment has no permissions set, ignore it, otherwise |
412 | when we later try to access it for read/write, we'll get an error | |
413 | or jam the kernel. */ | |
4f69f4c2 | 414 | if (read == 0 && write == 0 && exec == 0 && modified == 0) |
86fbe6cc EZ |
415 | { |
416 | if (info_verbose) | |
417 | { | |
5af949e3 | 418 | fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at %s\n", |
f5656ead | 419 | plongest (size), paddress (target_gdbarch (), vaddr)); |
86fbe6cc EZ |
420 | } |
421 | ||
422 | return 0; | |
423 | } | |
424 | ||
4f69f4c2 | 425 | if (write == 0 && modified == 0 && !solib_keep_data_in_core (vaddr, size)) |
cbb83bd1 RM |
426 | { |
427 | /* See if this region of memory lies inside a known file on disk. | |
428 | If so, we can avoid copying its contents by clearing SEC_LOAD. */ | |
429 | struct objfile *objfile; | |
430 | struct obj_section *objsec; | |
431 | ||
432 | ALL_OBJSECTIONS (objfile, objsec) | |
433 | { | |
434 | bfd *abfd = objfile->obfd; | |
435 | asection *asec = objsec->the_bfd_section; | |
436 | bfd_vma align = (bfd_vma) 1 << bfd_get_section_alignment (abfd, | |
437 | asec); | |
f1f6aadf PA |
438 | bfd_vma start = obj_section_addr (objsec) & -align; |
439 | bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align; | |
d8734c88 | 440 | |
cbb83bd1 RM |
441 | /* Match if either the entire memory region lies inside the |
442 | section (i.e. a mapping covering some pages of a large | |
443 | segment) or the entire section lies inside the memory region | |
444 | (i.e. a mapping covering multiple small sections). | |
445 | ||
446 | This BFD was synthesized from reading target memory, | |
447 | we don't want to omit that. */ | |
0c013353 JK |
448 | if (objfile->separate_debug_objfile_backlink == NULL |
449 | && ((vaddr >= start && vaddr + size <= end) | |
450 | || (start >= vaddr && end <= vaddr + size)) | |
cbb83bd1 RM |
451 | && !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY)) |
452 | { | |
349126ea | 453 | flags &= ~(SEC_LOAD | SEC_HAS_CONTENTS); |
0963b4bd | 454 | goto keep; /* Break out of two nested for loops. */ |
cbb83bd1 RM |
455 | } |
456 | } | |
457 | ||
4f69f4c2 | 458 | keep:; |
cbb83bd1 RM |
459 | } |
460 | ||
4f69f4c2 JK |
461 | if (write == 0) |
462 | flags |= SEC_READONLY; | |
463 | ||
cbb83bd1 RM |
464 | if (exec) |
465 | flags |= SEC_CODE; | |
466 | else | |
467 | flags |= SEC_DATA; | |
be4d1333 | 468 | |
52b57208 | 469 | osec = bfd_make_section_anyway_with_flags (obfd, "load", flags); |
d3420b2f | 470 | if (osec == NULL) |
be4d1333 | 471 | { |
8a3fe4f8 | 472 | warning (_("Couldn't make gcore segment: %s"), |
be4d1333 | 473 | bfd_errmsg (bfd_get_error ())); |
cbb83bd1 | 474 | return 1; |
be4d1333 MS |
475 | } |
476 | ||
477 | if (info_verbose) | |
478 | { | |
5af949e3 | 479 | fprintf_filtered (gdb_stdout, "Save segment, %s bytes at %s\n", |
f5656ead | 480 | plongest (size), paddress (target_gdbarch (), vaddr)); |
be4d1333 MS |
481 | } |
482 | ||
483 | bfd_set_section_size (obfd, osec, size); | |
cbb83bd1 | 484 | bfd_set_section_vma (obfd, osec, vaddr); |
d3420b2f | 485 | bfd_section_lma (obfd, osec) = 0; /* ??? bfd_set_section_lma? */ |
cbb83bd1 | 486 | return 0; |
be4d1333 MS |
487 | } |
488 | ||
b427c1bc TT |
489 | int |
490 | objfile_find_memory_regions (struct target_ops *self, | |
491 | find_memory_region_ftype func, void *obfd) | |
be4d1333 | 492 | { |
d3420b2f | 493 | /* Use objfile data to create memory sections. */ |
be4d1333 MS |
494 | struct objfile *objfile; |
495 | struct obj_section *objsec; | |
496 | bfd_vma temp_bottom, temp_top; | |
497 | ||
d3420b2f | 498 | /* Call callback function for each objfile section. */ |
be4d1333 MS |
499 | ALL_OBJSECTIONS (objfile, objsec) |
500 | { | |
501 | bfd *ibfd = objfile->obfd; | |
502 | asection *isec = objsec->the_bfd_section; | |
503 | flagword flags = bfd_get_section_flags (ibfd, isec); | |
be4d1333 | 504 | |
4f69f4c2 JK |
505 | /* Separate debug info files are irrelevant for gcore. */ |
506 | if (objfile->separate_debug_objfile_backlink != NULL) | |
507 | continue; | |
508 | ||
be4d1333 MS |
509 | if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) |
510 | { | |
511 | int size = bfd_section_size (ibfd, isec); | |
512 | int ret; | |
513 | ||
c6913b7d | 514 | ret = (*func) (obj_section_addr (objsec), size, |
d3420b2f MK |
515 | 1, /* All sections will be readable. */ |
516 | (flags & SEC_READONLY) == 0, /* Writable. */ | |
517 | (flags & SEC_CODE) != 0, /* Executable. */ | |
4f69f4c2 | 518 | 1, /* MODIFIED is unknown, pass it as true. */ |
d3420b2f MK |
519 | obfd); |
520 | if (ret != 0) | |
be4d1333 MS |
521 | return ret; |
522 | } | |
523 | } | |
524 | ||
d3420b2f | 525 | /* Make a stack segment. */ |
be4d1333 | 526 | if (derive_stack_segment (&temp_bottom, &temp_top)) |
cbb83bd1 | 527 | (*func) (temp_bottom, temp_top - temp_bottom, |
d3420b2f MK |
528 | 1, /* Stack section will be readable. */ |
529 | 1, /* Stack section will be writable. */ | |
530 | 0, /* Stack section will not be executable. */ | |
4f69f4c2 | 531 | 1, /* Stack section will be modified. */ |
be4d1333 MS |
532 | obfd); |
533 | ||
0963b4bd | 534 | /* Make a heap segment. */ |
be4d1333 | 535 | if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top)) |
d3420b2f MK |
536 | (*func) (temp_bottom, temp_top - temp_bottom, |
537 | 1, /* Heap section will be readable. */ | |
538 | 1, /* Heap section will be writable. */ | |
539 | 0, /* Heap section will not be executable. */ | |
4f69f4c2 | 540 | 1, /* Heap section will be modified. */ |
be4d1333 | 541 | obfd); |
d3420b2f | 542 | |
be4d1333 MS |
543 | return 0; |
544 | } | |
545 | ||
546 | static void | |
547 | gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) | |
548 | { | |
804e0f53 DJ |
549 | bfd_size_type size, total_size = bfd_section_size (obfd, osec); |
550 | file_ptr offset = 0; | |
be4d1333 | 551 | struct cleanup *old_chain = NULL; |
7c543f7b | 552 | gdb_byte *memhunk; |
be4d1333 | 553 | |
cbb83bd1 RM |
554 | /* Read-only sections are marked; we don't have to copy their contents. */ |
555 | if ((bfd_get_section_flags (obfd, osec) & SEC_LOAD) == 0) | |
d3420b2f MK |
556 | return; |
557 | ||
558 | /* Only interested in "load" sections. */ | |
61012eef | 559 | if (!startswith (bfd_section_name (obfd, osec), "load")) |
d3420b2f | 560 | return; |
be4d1333 | 561 | |
325fac50 | 562 | size = std::min (total_size, (bfd_size_type) MAX_COPY_BYTES); |
7c543f7b | 563 | memhunk = (gdb_byte *) xmalloc (size); |
be4d1333 MS |
564 | old_chain = make_cleanup (xfree, memhunk); |
565 | ||
804e0f53 DJ |
566 | while (total_size > 0) |
567 | { | |
568 | if (size > total_size) | |
569 | size = total_size; | |
570 | ||
571 | if (target_read_memory (bfd_section_vma (obfd, osec) + offset, | |
572 | memhunk, size) != 0) | |
573 | { | |
3e43a32a MS |
574 | warning (_("Memory read failed for corefile " |
575 | "section, %s bytes at %s."), | |
5af949e3 | 576 | plongest (size), |
f5656ead | 577 | paddress (target_gdbarch (), bfd_section_vma (obfd, osec))); |
804e0f53 DJ |
578 | break; |
579 | } | |
580 | if (!bfd_set_section_contents (obfd, osec, memhunk, offset, size)) | |
581 | { | |
582 | warning (_("Failed to write corefile contents (%s)."), | |
583 | bfd_errmsg (bfd_get_error ())); | |
584 | break; | |
585 | } | |
586 | ||
587 | total_size -= size; | |
588 | offset += size; | |
589 | } | |
be4d1333 | 590 | |
d3420b2f | 591 | do_cleanups (old_chain); /* Frees MEMHUNK. */ |
be4d1333 MS |
592 | } |
593 | ||
594 | static int | |
595 | gcore_memory_sections (bfd *obfd) | |
596 | { | |
35c2fab7 | 597 | /* Try gdbarch method first, then fall back to target method. */ |
f5656ead TT |
598 | if (!gdbarch_find_memory_regions_p (target_gdbarch ()) |
599 | || gdbarch_find_memory_regions (target_gdbarch (), | |
35c2fab7 UW |
600 | gcore_create_callback, obfd) != 0) |
601 | { | |
602 | if (target_find_memory_regions (gcore_create_callback, obfd) != 0) | |
603 | return 0; /* FIXME: error return/msg? */ | |
604 | } | |
be4d1333 | 605 | |
d3420b2f | 606 | /* Record phdrs for section-to-segment mapping. */ |
be4d1333 MS |
607 | bfd_map_over_sections (obfd, make_output_phdrs, NULL); |
608 | ||
d3420b2f | 609 | /* Copy memory region contents. */ |
be4d1333 MS |
610 | bfd_map_over_sections (obfd, gcore_copy_callback, NULL); |
611 | ||
d3420b2f | 612 | return 1; |
be4d1333 MS |
613 | } |
614 | ||
2c0b251b PA |
615 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
616 | extern initialize_file_ftype _initialize_gcore; | |
617 | ||
be4d1333 MS |
618 | void |
619 | _initialize_gcore (void) | |
620 | { | |
1bedd215 | 621 | add_com ("generate-core-file", class_files, gcore_command, _("\ |
d3420b2f | 622 | Save a core file with the current state of the debugged process.\n\ |
1bedd215 | 623 | Argument is optional filename. Default filename is 'core.<process_id>'.")); |
be4d1333 MS |
624 | |
625 | add_com_alias ("gcore", "generate-core-file", class_files, 1); | |
be4d1333 | 626 | } |