Commit | Line | Data |
---|---|---|
be4d1333 | 1 | /* Generate a core file for the inferior process. |
1bac305b | 2 | |
b811d2c2 | 3 | Copyright (C) 2001-2020 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> |
268a13a5 TT |
38 | #include "gdbsupport/gdb_unlinker.h" |
39 | #include "gdbsupport/byte-vector.h" | |
40 | #include "gdbsupport/scope-exit.h" | |
be4d1333 | 41 | |
804e0f53 DJ |
42 | /* The largest amount of memory to read from the target at once. We |
43 | must throttle it to limit the amount of memory used by GDB during | |
44 | generate-core-file for programs with large resident data. */ | |
45 | #define MAX_COPY_BYTES (1024 * 1024) | |
46 | ||
a78c2d62 | 47 | static const char *default_gcore_target (void); |
d3420b2f MK |
48 | static enum bfd_architecture default_gcore_arch (void); |
49 | static unsigned long default_gcore_mach (void); | |
50 | static int gcore_memory_sections (bfd *); | |
51 | ||
0156b218 MS |
52 | /* create_gcore_bfd -- helper for gcore_command (exported). |
53 | Open a new bfd core file for output, and return the handle. */ | |
be4d1333 | 54 | |
192b62ce | 55 | gdb_bfd_ref_ptr |
85e1311a | 56 | create_gcore_bfd (const char *filename) |
be4d1333 | 57 | { |
192b62ce | 58 | gdb_bfd_ref_ptr obfd (gdb_bfd_openw (filename, default_gcore_target ())); |
d8734c88 | 59 | |
192b62ce | 60 | if (obfd == NULL) |
0156b218 | 61 | error (_("Failed to open '%s' for output."), filename); |
192b62ce TT |
62 | bfd_set_format (obfd.get (), bfd_core); |
63 | bfd_set_arch_mach (obfd.get (), default_gcore_arch (), default_gcore_mach ()); | |
0156b218 MS |
64 | return obfd; |
65 | } | |
66 | ||
5fff78c4 | 67 | /* write_gcore_file_1 -- do the actual work of write_gcore_file. */ |
0156b218 | 68 | |
5fff78c4 MM |
69 | static void |
70 | write_gcore_file_1 (bfd *obfd) | |
0156b218 | 71 | { |
44287fd8 | 72 | gdb::unique_xmalloc_ptr<char> note_data; |
0156b218 MS |
73 | int note_size = 0; |
74 | asection *note_sec = NULL; | |
be4d1333 | 75 | |
d3420b2f | 76 | /* An external target method must build the notes section. */ |
6432734d UW |
77 | /* FIXME: uweigand/2011-10-06: All architectures that support core file |
78 | generation should be converted to gdbarch_make_corefile_notes; at that | |
79 | point, the target vector method can be removed. */ | |
f5656ead | 80 | if (!gdbarch_make_corefile_notes_p (target_gdbarch ())) |
44287fd8 | 81 | note_data.reset (target_make_corefile_notes (obfd, ¬e_size)); |
6432734d | 82 | else |
44287fd8 TT |
83 | note_data.reset (gdbarch_make_corefile_notes (target_gdbarch (), obfd, |
84 | ¬e_size)); | |
1d1f1ccb | 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 | ||
fd361982 AM |
98 | bfd_set_section_vma (note_sec, 0); |
99 | bfd_set_section_alignment (note_sec, 0); | |
100 | bfd_set_section_size (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. */ |
44287fd8 TT |
107 | if (!bfd_set_section_contents (obfd, note_sec, note_data.get (), 0, |
108 | note_size)) | |
6432734d | 109 | warning (_("writing note section (%s)"), bfd_errmsg (bfd_get_error ())); |
0156b218 MS |
110 | } |
111 | ||
5fff78c4 MM |
112 | /* write_gcore_file -- helper for gcore_command (exported). |
113 | Compose and write the corefile data to the core file. */ | |
114 | ||
115 | void | |
116 | write_gcore_file (bfd *obfd) | |
117 | { | |
5fff78c4 | 118 | target_prepare_to_generate_core (); |
a7b1986e TT |
119 | SCOPE_EXIT { target_done_generating_core (); }; |
120 | write_gcore_file_1 (obfd); | |
5fff78c4 MM |
121 | } |
122 | ||
0156b218 MS |
123 | /* gcore_command -- implements the 'gcore' command. |
124 | Generate a core file from the inferior process. */ | |
125 | ||
126 | static void | |
0b39b52e | 127 | gcore_command (const char *args, int from_tty) |
0156b218 | 128 | { |
bef155c3 | 129 | gdb::unique_xmalloc_ptr<char> corefilename; |
0156b218 MS |
130 | |
131 | /* No use generating a corefile without a target process. */ | |
132 | if (!target_has_execution) | |
133 | noprocess (); | |
134 | ||
135 | if (args && *args) | |
bef155c3 | 136 | corefilename.reset (tilde_expand (args)); |
0156b218 MS |
137 | else |
138 | { | |
139 | /* Default corefile name is "core.PID". */ | |
e99b03dc | 140 | corefilename.reset (xstrprintf ("core.%d", inferior_ptid.pid ())); |
be4d1333 MS |
141 | } |
142 | ||
0156b218 MS |
143 | if (info_verbose) |
144 | fprintf_filtered (gdb_stdout, | |
bef155c3 TT |
145 | "Opening corefile '%s' for output.\n", |
146 | corefilename.get ()); | |
0156b218 | 147 | |
b31488a3 KR |
148 | if (target_supports_dumpcore ()) |
149 | target_dumpcore (corefilename.get ()); | |
150 | else | |
151 | { | |
152 | /* Open the output file. */ | |
153 | gdb_bfd_ref_ptr obfd (create_gcore_bfd (corefilename.get ())); | |
0156b218 | 154 | |
b31488a3 KR |
155 | /* Arrange to unlink the file on failure. */ |
156 | gdb::unlinker unlink_file (corefilename.get ()); | |
0156b218 | 157 | |
b31488a3 KR |
158 | /* Call worker function. */ |
159 | write_gcore_file (obfd.get ()); | |
0156b218 | 160 | |
b31488a3 KR |
161 | /* Succeeded. */ |
162 | unlink_file.keep (); | |
163 | } | |
1e351ed1 | 164 | |
bef155c3 | 165 | fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename.get ()); |
be4d1333 MS |
166 | } |
167 | ||
168 | static unsigned long | |
169 | default_gcore_mach (void) | |
170 | { | |
d3420b2f | 171 | #if 1 /* See if this even matters... */ |
6dbdc4a3 MS |
172 | return 0; |
173 | #else | |
1143fffb | 174 | |
f5656ead | 175 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch ()); |
be4d1333 MS |
176 | |
177 | if (bfdarch != NULL) | |
178 | return bfdarch->mach; | |
be4d1333 | 179 | if (exec_bfd == NULL) |
8a3fe4f8 | 180 | error (_("Can't find default bfd machine type (need execfile).")); |
be4d1333 MS |
181 | |
182 | return bfd_get_mach (exec_bfd); | |
6dbdc4a3 | 183 | #endif /* 1 */ |
be4d1333 MS |
184 | } |
185 | ||
186 | static enum bfd_architecture | |
187 | default_gcore_arch (void) | |
188 | { | |
f5656ead | 189 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch ()); |
be4d1333 MS |
190 | |
191 | if (bfdarch != NULL) | |
192 | return bfdarch->arch; | |
be4d1333 | 193 | if (exec_bfd == NULL) |
8a3fe4f8 | 194 | error (_("Can't find bfd architecture for corefile (need execfile).")); |
be4d1333 MS |
195 | |
196 | return bfd_get_arch (exec_bfd); | |
197 | } | |
198 | ||
a78c2d62 | 199 | static const char * |
be4d1333 MS |
200 | default_gcore_target (void) |
201 | { | |
a78c2d62 | 202 | /* The gdbarch may define a target to use for core files. */ |
f5656ead TT |
203 | if (gdbarch_gcore_bfd_target_p (target_gdbarch ())) |
204 | return gdbarch_gcore_bfd_target (target_gdbarch ()); | |
a78c2d62 UW |
205 | |
206 | /* Otherwise, try to fall back to the exec_bfd target. This will probably | |
207 | not work for non-ELF targets. */ | |
be4d1333 | 208 | if (exec_bfd == NULL) |
6dbdc4a3 MS |
209 | return NULL; |
210 | else | |
211 | return bfd_get_target (exec_bfd); | |
be4d1333 MS |
212 | } |
213 | ||
d3420b2f MK |
214 | /* Derive a reasonable stack segment by unwinding the target stack, |
215 | and store its limits in *BOTTOM and *TOP. Return non-zero if | |
216 | successful. */ | |
be4d1333 | 217 | |
cbb83bd1 | 218 | static int |
69db8bae | 219 | derive_stack_segment (bfd_vma *bottom, bfd_vma *top) |
be4d1333 | 220 | { |
be4d1333 MS |
221 | struct frame_info *fi, *tmp_fi; |
222 | ||
d3420b2f MK |
223 | gdb_assert (bottom); |
224 | gdb_assert (top); | |
be4d1333 | 225 | |
d3420b2f | 226 | /* Can't succeed without stack and registers. */ |
be4d1333 | 227 | if (!target_has_stack || !target_has_registers) |
d3420b2f | 228 | return 0; |
be4d1333 | 229 | |
d3420b2f MK |
230 | /* Can't succeed without current frame. */ |
231 | fi = get_current_frame (); | |
232 | if (fi == NULL) | |
233 | return 0; | |
be4d1333 | 234 | |
d3420b2f | 235 | /* Save frame pointer of TOS frame. */ |
8d357cca | 236 | *top = get_frame_base (fi); |
d3420b2f | 237 | /* If current stack pointer is more "inner", use that instead. */ |
40a6adc1 | 238 | if (gdbarch_inner_than (get_frame_arch (fi), get_frame_sp (fi), *top)) |
fb4443d8 | 239 | *top = get_frame_sp (fi); |
be4d1333 | 240 | |
d3420b2f | 241 | /* Find prev-most frame. */ |
be4d1333 MS |
242 | while ((tmp_fi = get_prev_frame (fi)) != NULL) |
243 | fi = tmp_fi; | |
244 | ||
d3420b2f | 245 | /* Save frame pointer of prev-most frame. */ |
8d357cca | 246 | *bottom = get_frame_base (fi); |
be4d1333 | 247 | |
d3420b2f MK |
248 | /* Now canonicalize their order, so that BOTTOM is a lower address |
249 | (as opposed to a lower stack frame). */ | |
be4d1333 MS |
250 | if (*bottom > *top) |
251 | { | |
d3420b2f MK |
252 | bfd_vma tmp_vma; |
253 | ||
be4d1333 MS |
254 | tmp_vma = *top; |
255 | *top = *bottom; | |
256 | *bottom = tmp_vma; | |
257 | } | |
258 | ||
d3420b2f | 259 | return 1; |
be4d1333 MS |
260 | } |
261 | ||
0156b218 MS |
262 | /* call_target_sbrk -- |
263 | helper function for derive_heap_segment. */ | |
264 | ||
265 | static bfd_vma | |
266 | call_target_sbrk (int sbrk_arg) | |
267 | { | |
268 | struct objfile *sbrk_objf; | |
269 | struct gdbarch *gdbarch; | |
270 | bfd_vma top_of_heap; | |
271 | struct value *target_sbrk_arg; | |
272 | struct value *sbrk_fn, *ret; | |
273 | bfd_vma tmp; | |
274 | ||
3b7344d5 | 275 | if (lookup_minimal_symbol ("sbrk", NULL, NULL).minsym != NULL) |
0156b218 MS |
276 | { |
277 | sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf); | |
278 | if (sbrk_fn == NULL) | |
279 | return (bfd_vma) 0; | |
280 | } | |
3b7344d5 | 281 | else if (lookup_minimal_symbol ("_sbrk", NULL, NULL).minsym != NULL) |
0156b218 MS |
282 | { |
283 | sbrk_fn = find_function_in_inferior ("_sbrk", &sbrk_objf); | |
284 | if (sbrk_fn == NULL) | |
285 | return (bfd_vma) 0; | |
286 | } | |
287 | else | |
288 | return (bfd_vma) 0; | |
289 | ||
08feed99 | 290 | gdbarch = sbrk_objf->arch (); |
0156b218 MS |
291 | target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int, |
292 | sbrk_arg); | |
293 | gdb_assert (target_sbrk_arg); | |
e71585ff | 294 | ret = call_function_by_hand (sbrk_fn, NULL, target_sbrk_arg); |
0156b218 MS |
295 | if (ret == NULL) |
296 | return (bfd_vma) 0; | |
297 | ||
298 | tmp = value_as_long (ret); | |
299 | if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff) | |
300 | return (bfd_vma) 0; | |
301 | ||
302 | top_of_heap = tmp; | |
303 | return top_of_heap; | |
304 | } | |
305 | ||
d3420b2f MK |
306 | /* Derive a reasonable heap segment for ABFD by looking at sbrk and |
307 | the static data sections. Store its limits in *BOTTOM and *TOP. | |
308 | Return non-zero if successful. */ | |
be4d1333 | 309 | |
cbb83bd1 | 310 | static int |
69db8bae | 311 | derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) |
be4d1333 MS |
312 | { |
313 | bfd_vma top_of_data_memory = 0; | |
314 | bfd_vma top_of_heap = 0; | |
315 | bfd_size_type sec_size; | |
be4d1333 MS |
316 | bfd_vma sec_vaddr; |
317 | asection *sec; | |
318 | ||
d3420b2f MK |
319 | gdb_assert (bottom); |
320 | gdb_assert (top); | |
be4d1333 | 321 | |
d3420b2f MK |
322 | /* This function depends on being able to call a function in the |
323 | inferior. */ | |
be4d1333 | 324 | if (!target_has_execution) |
d3420b2f MK |
325 | return 0; |
326 | ||
327 | /* The following code assumes that the link map is arranged as | |
328 | follows (low to high addresses): | |
be4d1333 | 329 | |
d3420b2f MK |
330 | --------------------------------- |
331 | | text sections | | |
332 | --------------------------------- | |
333 | | data sections (including bss) | | |
334 | --------------------------------- | |
335 | | heap | | |
336 | --------------------------------- */ | |
be4d1333 MS |
337 | |
338 | for (sec = abfd->sections; sec; sec = sec->next) | |
339 | { | |
fd361982 AM |
340 | if (bfd_section_flags (sec) & SEC_DATA |
341 | || strcmp (".bss", bfd_section_name (sec)) == 0) | |
be4d1333 | 342 | { |
fd361982 AM |
343 | sec_vaddr = bfd_section_vma (sec); |
344 | sec_size = bfd_section_size (sec); | |
be4d1333 MS |
345 | if (sec_vaddr + sec_size > top_of_data_memory) |
346 | top_of_data_memory = sec_vaddr + sec_size; | |
347 | } | |
348 | } | |
d3420b2f | 349 | |
0156b218 MS |
350 | top_of_heap = call_target_sbrk (0); |
351 | if (top_of_heap == (bfd_vma) 0) | |
be4d1333 | 352 | return 0; |
be4d1333 | 353 | |
d3420b2f | 354 | /* Return results. */ |
be4d1333 MS |
355 | if (top_of_heap > top_of_data_memory) |
356 | { | |
357 | *bottom = top_of_data_memory; | |
358 | *top = top_of_heap; | |
d3420b2f | 359 | return 1; |
be4d1333 | 360 | } |
d3420b2f MK |
361 | |
362 | /* No additional heap space needs to be saved. */ | |
363 | return 0; | |
be4d1333 MS |
364 | } |
365 | ||
be4d1333 | 366 | static void |
f4f2b85f | 367 | make_output_phdrs (bfd *obfd, asection *osec) |
be4d1333 MS |
368 | { |
369 | int p_flags = 0; | |
0156b218 | 370 | int p_type = 0; |
be4d1333 MS |
371 | |
372 | /* FIXME: these constants may only be applicable for ELF. */ | |
fd361982 | 373 | if (startswith (bfd_section_name (osec), "load")) |
be4d1333 | 374 | p_type = PT_LOAD; |
fd361982 | 375 | else if (startswith (bfd_section_name (osec), "note")) |
be4d1333 | 376 | p_type = PT_NOTE; |
0156b218 MS |
377 | else |
378 | p_type = PT_NULL; | |
be4d1333 MS |
379 | |
380 | p_flags |= PF_R; /* Segment is readable. */ | |
fd361982 | 381 | if (!(bfd_section_flags (osec) & SEC_READONLY)) |
be4d1333 | 382 | p_flags |= PF_W; /* Segment is writable. */ |
fd361982 | 383 | if (bfd_section_flags (osec) & SEC_CODE) |
be4d1333 MS |
384 | p_flags |= PF_X; /* Segment is executable. */ |
385 | ||
d3420b2f | 386 | bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, 0, 0, 1, &osec); |
be4d1333 MS |
387 | } |
388 | ||
4f69f4c2 JK |
389 | /* find_memory_region_ftype implementation. DATA is 'bfd *' for the core file |
390 | GDB is creating. */ | |
391 | ||
cbb83bd1 | 392 | static int |
4f69f4c2 JK |
393 | gcore_create_callback (CORE_ADDR vaddr, unsigned long size, int read, |
394 | int write, int exec, int modified, void *data) | |
be4d1333 | 395 | { |
9a3c8263 | 396 | bfd *obfd = (bfd *) data; |
be4d1333 | 397 | asection *osec; |
cbb83bd1 RM |
398 | flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD; |
399 | ||
86fbe6cc EZ |
400 | /* If the memory segment has no permissions set, ignore it, otherwise |
401 | when we later try to access it for read/write, we'll get an error | |
402 | or jam the kernel. */ | |
4f69f4c2 | 403 | if (read == 0 && write == 0 && exec == 0 && modified == 0) |
86fbe6cc EZ |
404 | { |
405 | if (info_verbose) | |
406 | { | |
5af949e3 | 407 | fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at %s\n", |
f5656ead | 408 | plongest (size), paddress (target_gdbarch (), vaddr)); |
86fbe6cc EZ |
409 | } |
410 | ||
411 | return 0; | |
412 | } | |
413 | ||
4f69f4c2 | 414 | if (write == 0 && modified == 0 && !solib_keep_data_in_core (vaddr, size)) |
cbb83bd1 RM |
415 | { |
416 | /* See if this region of memory lies inside a known file on disk. | |
417 | If so, we can avoid copying its contents by clearing SEC_LOAD. */ | |
cbb83bd1 RM |
418 | struct obj_section *objsec; |
419 | ||
2030c079 | 420 | for (objfile *objfile : current_program_space->objfiles ()) |
3b9d3ac2 TT |
421 | ALL_OBJFILE_OSECTIONS (objfile, objsec) |
422 | { | |
423 | bfd *abfd = objfile->obfd; | |
424 | asection *asec = objsec->the_bfd_section; | |
fd361982 | 425 | bfd_vma align = (bfd_vma) 1 << bfd_section_alignment (asec); |
3b9d3ac2 TT |
426 | bfd_vma start = obj_section_addr (objsec) & -align; |
427 | bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align; | |
428 | ||
429 | /* Match if either the entire memory region lies inside the | |
430 | section (i.e. a mapping covering some pages of a large | |
431 | segment) or the entire section lies inside the memory region | |
432 | (i.e. a mapping covering multiple small sections). | |
433 | ||
434 | This BFD was synthesized from reading target memory, | |
435 | we don't want to omit that. */ | |
436 | if (objfile->separate_debug_objfile_backlink == NULL | |
437 | && ((vaddr >= start && vaddr + size <= end) | |
438 | || (start >= vaddr && end <= vaddr + size)) | |
439 | && !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY)) | |
440 | { | |
441 | flags &= ~(SEC_LOAD | SEC_HAS_CONTENTS); | |
442 | goto keep; /* Break out of two nested for loops. */ | |
443 | } | |
444 | } | |
cbb83bd1 | 445 | |
4f69f4c2 | 446 | keep:; |
cbb83bd1 RM |
447 | } |
448 | ||
4f69f4c2 JK |
449 | if (write == 0) |
450 | flags |= SEC_READONLY; | |
451 | ||
cbb83bd1 RM |
452 | if (exec) |
453 | flags |= SEC_CODE; | |
454 | else | |
455 | flags |= SEC_DATA; | |
be4d1333 | 456 | |
52b57208 | 457 | osec = bfd_make_section_anyway_with_flags (obfd, "load", flags); |
d3420b2f | 458 | if (osec == NULL) |
be4d1333 | 459 | { |
8a3fe4f8 | 460 | warning (_("Couldn't make gcore segment: %s"), |
be4d1333 | 461 | bfd_errmsg (bfd_get_error ())); |
cbb83bd1 | 462 | return 1; |
be4d1333 MS |
463 | } |
464 | ||
465 | if (info_verbose) | |
466 | { | |
5af949e3 | 467 | fprintf_filtered (gdb_stdout, "Save segment, %s bytes at %s\n", |
f5656ead | 468 | plongest (size), paddress (target_gdbarch (), vaddr)); |
be4d1333 MS |
469 | } |
470 | ||
fd361982 AM |
471 | bfd_set_section_size (osec, size); |
472 | bfd_set_section_vma (osec, vaddr); | |
473 | bfd_set_section_lma (osec, 0); | |
cbb83bd1 | 474 | return 0; |
be4d1333 MS |
475 | } |
476 | ||
b427c1bc TT |
477 | int |
478 | objfile_find_memory_regions (struct target_ops *self, | |
479 | find_memory_region_ftype func, void *obfd) | |
be4d1333 | 480 | { |
d3420b2f | 481 | /* Use objfile data to create memory sections. */ |
be4d1333 MS |
482 | struct obj_section *objsec; |
483 | bfd_vma temp_bottom, temp_top; | |
484 | ||
d3420b2f | 485 | /* Call callback function for each objfile section. */ |
2030c079 | 486 | for (objfile *objfile : current_program_space->objfiles ()) |
3b9d3ac2 TT |
487 | ALL_OBJFILE_OSECTIONS (objfile, objsec) |
488 | { | |
3b9d3ac2 | 489 | asection *isec = objsec->the_bfd_section; |
fd361982 | 490 | flagword flags = bfd_section_flags (isec); |
3b9d3ac2 TT |
491 | |
492 | /* Separate debug info files are irrelevant for gcore. */ | |
493 | if (objfile->separate_debug_objfile_backlink != NULL) | |
494 | continue; | |
495 | ||
496 | if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) | |
497 | { | |
fd361982 | 498 | int size = bfd_section_size (isec); |
3b9d3ac2 TT |
499 | int ret; |
500 | ||
501 | ret = (*func) (obj_section_addr (objsec), size, | |
502 | 1, /* All sections will be readable. */ | |
503 | (flags & SEC_READONLY) == 0, /* Writable. */ | |
504 | (flags & SEC_CODE) != 0, /* Executable. */ | |
505 | 1, /* MODIFIED is unknown, pass it as true. */ | |
506 | obfd); | |
507 | if (ret != 0) | |
508 | return ret; | |
509 | } | |
510 | } | |
be4d1333 | 511 | |
d3420b2f | 512 | /* Make a stack segment. */ |
be4d1333 | 513 | if (derive_stack_segment (&temp_bottom, &temp_top)) |
cbb83bd1 | 514 | (*func) (temp_bottom, temp_top - temp_bottom, |
d3420b2f MK |
515 | 1, /* Stack section will be readable. */ |
516 | 1, /* Stack section will be writable. */ | |
517 | 0, /* Stack section will not be executable. */ | |
4f69f4c2 | 518 | 1, /* Stack section will be modified. */ |
be4d1333 MS |
519 | obfd); |
520 | ||
0963b4bd | 521 | /* Make a heap segment. */ |
be4d1333 | 522 | if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top)) |
d3420b2f MK |
523 | (*func) (temp_bottom, temp_top - temp_bottom, |
524 | 1, /* Heap section will be readable. */ | |
525 | 1, /* Heap section will be writable. */ | |
526 | 0, /* Heap section will not be executable. */ | |
4f69f4c2 | 527 | 1, /* Heap section will be modified. */ |
be4d1333 | 528 | obfd); |
d3420b2f | 529 | |
be4d1333 MS |
530 | return 0; |
531 | } | |
532 | ||
533 | static void | |
f4f2b85f | 534 | gcore_copy_callback (bfd *obfd, asection *osec) |
be4d1333 | 535 | { |
fd361982 | 536 | bfd_size_type size, total_size = bfd_section_size (osec); |
804e0f53 | 537 | file_ptr offset = 0; |
be4d1333 | 538 | |
cbb83bd1 | 539 | /* Read-only sections are marked; we don't have to copy their contents. */ |
fd361982 | 540 | if ((bfd_section_flags (osec) & SEC_LOAD) == 0) |
d3420b2f MK |
541 | return; |
542 | ||
543 | /* Only interested in "load" sections. */ | |
fd361982 | 544 | if (!startswith (bfd_section_name (osec), "load")) |
d3420b2f | 545 | return; |
be4d1333 | 546 | |
325fac50 | 547 | size = std::min (total_size, (bfd_size_type) MAX_COPY_BYTES); |
26fcd5d7 | 548 | gdb::byte_vector memhunk (size); |
be4d1333 | 549 | |
804e0f53 DJ |
550 | while (total_size > 0) |
551 | { | |
552 | if (size > total_size) | |
553 | size = total_size; | |
554 | ||
fd361982 | 555 | if (target_read_memory (bfd_section_vma (osec) + offset, |
26fcd5d7 | 556 | memhunk.data (), size) != 0) |
804e0f53 | 557 | { |
3e43a32a MS |
558 | warning (_("Memory read failed for corefile " |
559 | "section, %s bytes at %s."), | |
5af949e3 | 560 | plongest (size), |
fd361982 | 561 | paddress (target_gdbarch (), bfd_section_vma (osec))); |
804e0f53 DJ |
562 | break; |
563 | } | |
26fcd5d7 TT |
564 | if (!bfd_set_section_contents (obfd, osec, memhunk.data (), |
565 | offset, size)) | |
804e0f53 DJ |
566 | { |
567 | warning (_("Failed to write corefile contents (%s)."), | |
568 | bfd_errmsg (bfd_get_error ())); | |
569 | break; | |
570 | } | |
571 | ||
572 | total_size -= size; | |
573 | offset += size; | |
574 | } | |
be4d1333 MS |
575 | } |
576 | ||
577 | static int | |
578 | gcore_memory_sections (bfd *obfd) | |
579 | { | |
35c2fab7 | 580 | /* Try gdbarch method first, then fall back to target method. */ |
f5656ead TT |
581 | if (!gdbarch_find_memory_regions_p (target_gdbarch ()) |
582 | || gdbarch_find_memory_regions (target_gdbarch (), | |
35c2fab7 UW |
583 | gcore_create_callback, obfd) != 0) |
584 | { | |
585 | if (target_find_memory_regions (gcore_create_callback, obfd) != 0) | |
586 | return 0; /* FIXME: error return/msg? */ | |
587 | } | |
be4d1333 | 588 | |
d3420b2f | 589 | /* Record phdrs for section-to-segment mapping. */ |
f4f2b85f TT |
590 | for (asection *sect : gdb_bfd_sections (obfd)) |
591 | make_output_phdrs (obfd, sect); | |
be4d1333 | 592 | |
d3420b2f | 593 | /* Copy memory region contents. */ |
f4f2b85f TT |
594 | for (asection *sect : gdb_bfd_sections (obfd)) |
595 | gcore_copy_callback (obfd, sect); | |
be4d1333 | 596 | |
d3420b2f | 597 | return 1; |
be4d1333 MS |
598 | } |
599 | ||
6c265988 | 600 | void _initialize_gcore (); |
be4d1333 | 601 | void |
6c265988 | 602 | _initialize_gcore () |
be4d1333 | 603 | { |
1bedd215 | 604 | add_com ("generate-core-file", class_files, gcore_command, _("\ |
d3420b2f | 605 | Save a core file with the current state of the debugged process.\n\ |
0cab2f1e TT |
606 | Usage: generate-core-file [FILENAME]\n\ |
607 | Argument is optional filename. Default filename is 'core.PROCESS_ID'.")); | |
be4d1333 MS |
608 | |
609 | add_com_alias ("gcore", "generate-core-file", class_files, 1); | |
be4d1333 | 610 | } |