Commit | Line | Data |
---|---|---|
4aa995e1 PA |
1 | /* Target-dependent code for GNU/Linux, architecture independent. |
2 | ||
32d0add0 | 3 | Copyright (C) 2009-2015 Free Software Foundation, Inc. |
4aa995e1 PA |
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 | |
9 | the Free Software Foundation; either version 3 of the License, or | |
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 | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "gdbtypes.h" | |
2c0b251b | 22 | #include "linux-tdep.h" |
6c95b8df PA |
23 | #include "auxv.h" |
24 | #include "target.h" | |
6432734d UW |
25 | #include "gdbthread.h" |
26 | #include "gdbcore.h" | |
27 | #include "regcache.h" | |
28 | #include "regset.h" | |
6c95b8df | 29 | #include "elf/common.h" |
6432734d | 30 | #include "elf-bfd.h" /* for elfcore_write_* */ |
a5ee0f0c | 31 | #include "inferior.h" |
3030c96e | 32 | #include "cli/cli-utils.h" |
451b7c33 TT |
33 | #include "arch-utils.h" |
34 | #include "gdb_obstack.h" | |
cdfa0b0a | 35 | #include "observer.h" |
3bc3cebe JK |
36 | #include "objfiles.h" |
37 | #include "infcall.h" | |
df8411da SDJ |
38 | #include "gdbcmd.h" |
39 | #include "gdb_regex.h" | |
3030c96e UW |
40 | |
41 | #include <ctype.h> | |
4aa995e1 | 42 | |
df8411da SDJ |
43 | /* This enum represents the values that the user can choose when |
44 | informing the Linux kernel about which memory mappings will be | |
45 | dumped in a corefile. They are described in the file | |
46 | Documentation/filesystems/proc.txt, inside the Linux kernel | |
47 | tree. */ | |
48 | ||
49 | enum | |
50 | { | |
51 | COREFILTER_ANON_PRIVATE = 1 << 0, | |
52 | COREFILTER_ANON_SHARED = 1 << 1, | |
53 | COREFILTER_MAPPED_PRIVATE = 1 << 2, | |
54 | COREFILTER_MAPPED_SHARED = 1 << 3, | |
55 | COREFILTER_ELF_HEADERS = 1 << 4, | |
56 | COREFILTER_HUGETLB_PRIVATE = 1 << 5, | |
57 | COREFILTER_HUGETLB_SHARED = 1 << 6, | |
58 | }; | |
59 | ||
60 | /* This struct is used to map flags found in the "VmFlags:" field (in | |
61 | the /proc/<PID>/smaps file). */ | |
62 | ||
63 | struct smaps_vmflags | |
64 | { | |
65 | /* Zero if this structure has not been initialized yet. It | |
66 | probably means that the Linux kernel being used does not emit | |
67 | the "VmFlags:" field on "/proc/PID/smaps". */ | |
68 | ||
69 | unsigned int initialized_p : 1; | |
70 | ||
71 | /* Memory mapped I/O area (VM_IO, "io"). */ | |
72 | ||
73 | unsigned int io_page : 1; | |
74 | ||
75 | /* Area uses huge TLB pages (VM_HUGETLB, "ht"). */ | |
76 | ||
77 | unsigned int uses_huge_tlb : 1; | |
78 | ||
79 | /* Do not include this memory region on the coredump (VM_DONTDUMP, "dd"). */ | |
80 | ||
81 | unsigned int exclude_coredump : 1; | |
82 | ||
83 | /* Is this a MAP_SHARED mapping (VM_SHARED, "sh"). */ | |
84 | ||
85 | unsigned int shared_mapping : 1; | |
86 | }; | |
87 | ||
88 | /* Whether to take the /proc/PID/coredump_filter into account when | |
89 | generating a corefile. */ | |
90 | ||
91 | static int use_coredump_filter = 1; | |
92 | ||
eb14d406 SDJ |
93 | /* This enum represents the signals' numbers on a generic architecture |
94 | running the Linux kernel. The definition of "generic" comes from | |
95 | the file <include/uapi/asm-generic/signal.h>, from the Linux kernel | |
96 | tree, which is the "de facto" implementation of signal numbers to | |
97 | be used by new architecture ports. | |
98 | ||
99 | For those architectures which have differences between the generic | |
100 | standard (e.g., Alpha), we define the different signals (and *only* | |
101 | those) in the specific target-dependent file (e.g., | |
102 | alpha-linux-tdep.c, for Alpha). Please refer to the architecture's | |
103 | tdep file for more information. | |
104 | ||
105 | ARM deserves a special mention here. On the file | |
106 | <arch/arm/include/uapi/asm/signal.h>, it defines only one different | |
107 | (and ARM-only) signal, which is SIGSWI, with the same number as | |
108 | SIGRTMIN. This signal is used only for a very specific target, | |
109 | called ArthurOS (from RISCOS). Therefore, we do not handle it on | |
110 | the ARM-tdep file, and we can safely use the generic signal handler | |
111 | here for ARM targets. | |
112 | ||
113 | As stated above, this enum is derived from | |
114 | <include/uapi/asm-generic/signal.h>, from the Linux kernel | |
115 | tree. */ | |
116 | ||
117 | enum | |
118 | { | |
119 | LINUX_SIGHUP = 1, | |
120 | LINUX_SIGINT = 2, | |
121 | LINUX_SIGQUIT = 3, | |
122 | LINUX_SIGILL = 4, | |
123 | LINUX_SIGTRAP = 5, | |
124 | LINUX_SIGABRT = 6, | |
125 | LINUX_SIGIOT = 6, | |
126 | LINUX_SIGBUS = 7, | |
127 | LINUX_SIGFPE = 8, | |
128 | LINUX_SIGKILL = 9, | |
129 | LINUX_SIGUSR1 = 10, | |
130 | LINUX_SIGSEGV = 11, | |
131 | LINUX_SIGUSR2 = 12, | |
132 | LINUX_SIGPIPE = 13, | |
133 | LINUX_SIGALRM = 14, | |
134 | LINUX_SIGTERM = 15, | |
135 | LINUX_SIGSTKFLT = 16, | |
136 | LINUX_SIGCHLD = 17, | |
137 | LINUX_SIGCONT = 18, | |
138 | LINUX_SIGSTOP = 19, | |
139 | LINUX_SIGTSTP = 20, | |
140 | LINUX_SIGTTIN = 21, | |
141 | LINUX_SIGTTOU = 22, | |
142 | LINUX_SIGURG = 23, | |
143 | LINUX_SIGXCPU = 24, | |
144 | LINUX_SIGXFSZ = 25, | |
145 | LINUX_SIGVTALRM = 26, | |
146 | LINUX_SIGPROF = 27, | |
147 | LINUX_SIGWINCH = 28, | |
148 | LINUX_SIGIO = 29, | |
149 | LINUX_SIGPOLL = LINUX_SIGIO, | |
150 | LINUX_SIGPWR = 30, | |
151 | LINUX_SIGSYS = 31, | |
152 | LINUX_SIGUNUSED = 31, | |
153 | ||
154 | LINUX_SIGRTMIN = 32, | |
155 | LINUX_SIGRTMAX = 64, | |
156 | }; | |
157 | ||
06253dd3 JK |
158 | static struct gdbarch_data *linux_gdbarch_data_handle; |
159 | ||
160 | struct linux_gdbarch_data | |
161 | { | |
162 | struct type *siginfo_type; | |
163 | }; | |
164 | ||
165 | static void * | |
166 | init_linux_gdbarch_data (struct gdbarch *gdbarch) | |
167 | { | |
168 | return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct linux_gdbarch_data); | |
169 | } | |
170 | ||
171 | static struct linux_gdbarch_data * | |
172 | get_linux_gdbarch_data (struct gdbarch *gdbarch) | |
173 | { | |
174 | return gdbarch_data (gdbarch, linux_gdbarch_data_handle); | |
175 | } | |
176 | ||
cdfa0b0a PA |
177 | /* Per-inferior data key. */ |
178 | static const struct inferior_data *linux_inferior_data; | |
179 | ||
180 | /* Linux-specific cached data. This is used by GDB for caching | |
181 | purposes for each inferior. This helps reduce the overhead of | |
182 | transfering data from a remote target to the local host. */ | |
183 | struct linux_info | |
184 | { | |
185 | /* Cache of the inferior's vsyscall/vDSO mapping range. Only valid | |
186 | if VSYSCALL_RANGE_P is positive. This is cached because getting | |
187 | at this info requires an auxv lookup (which is itself cached), | |
188 | and looking through the inferior's mappings (which change | |
189 | throughout execution and therefore cannot be cached). */ | |
190 | struct mem_range vsyscall_range; | |
191 | ||
192 | /* Zero if we haven't tried looking up the vsyscall's range before | |
193 | yet. Positive if we tried looking it up, and found it. Negative | |
194 | if we tried looking it up but failed. */ | |
195 | int vsyscall_range_p; | |
196 | }; | |
197 | ||
198 | /* Frees whatever allocated space there is to be freed and sets INF's | |
199 | linux cache data pointer to NULL. */ | |
200 | ||
201 | static void | |
202 | invalidate_linux_cache_inf (struct inferior *inf) | |
203 | { | |
204 | struct linux_info *info; | |
205 | ||
206 | info = inferior_data (inf, linux_inferior_data); | |
207 | if (info != NULL) | |
208 | { | |
209 | xfree (info); | |
210 | set_inferior_data (inf, linux_inferior_data, NULL); | |
211 | } | |
212 | } | |
213 | ||
214 | /* Handles the cleanup of the linux cache for inferior INF. ARG is | |
215 | ignored. Callback for the inferior_appeared and inferior_exit | |
216 | events. */ | |
217 | ||
218 | static void | |
219 | linux_inferior_data_cleanup (struct inferior *inf, void *arg) | |
220 | { | |
221 | invalidate_linux_cache_inf (inf); | |
222 | } | |
223 | ||
224 | /* Fetch the linux cache info for INF. This function always returns a | |
225 | valid INFO pointer. */ | |
226 | ||
227 | static struct linux_info * | |
228 | get_linux_inferior_data (void) | |
229 | { | |
230 | struct linux_info *info; | |
231 | struct inferior *inf = current_inferior (); | |
232 | ||
233 | info = inferior_data (inf, linux_inferior_data); | |
234 | if (info == NULL) | |
235 | { | |
236 | info = XCNEW (struct linux_info); | |
237 | set_inferior_data (inf, linux_inferior_data, info); | |
238 | } | |
239 | ||
240 | return info; | |
241 | } | |
242 | ||
4aa995e1 PA |
243 | /* This function is suitable for architectures that don't |
244 | extend/override the standard siginfo structure. */ | |
245 | ||
246 | struct type * | |
247 | linux_get_siginfo_type (struct gdbarch *gdbarch) | |
248 | { | |
06253dd3 | 249 | struct linux_gdbarch_data *linux_gdbarch_data; |
4aa995e1 PA |
250 | struct type *int_type, *uint_type, *long_type, *void_ptr_type; |
251 | struct type *uid_type, *pid_type; | |
252 | struct type *sigval_type, *clock_type; | |
253 | struct type *siginfo_type, *sifields_type; | |
254 | struct type *type; | |
255 | ||
06253dd3 JK |
256 | linux_gdbarch_data = get_linux_gdbarch_data (gdbarch); |
257 | if (linux_gdbarch_data->siginfo_type != NULL) | |
258 | return linux_gdbarch_data->siginfo_type; | |
259 | ||
e9bb382b UW |
260 | int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), |
261 | 0, "int"); | |
262 | uint_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
263 | 1, "unsigned int"); | |
264 | long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), | |
265 | 0, "long"); | |
4aa995e1 PA |
266 | void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void); |
267 | ||
268 | /* sival_t */ | |
e9bb382b | 269 | sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); |
4aa995e1 PA |
270 | TYPE_NAME (sigval_type) = xstrdup ("sigval_t"); |
271 | append_composite_type_field (sigval_type, "sival_int", int_type); | |
272 | append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type); | |
273 | ||
274 | /* __pid_t */ | |
e3aa49af MS |
275 | pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
276 | TYPE_LENGTH (int_type), "__pid_t"); | |
4aa995e1 | 277 | TYPE_TARGET_TYPE (pid_type) = int_type; |
e9bb382b | 278 | TYPE_TARGET_STUB (pid_type) = 1; |
4aa995e1 PA |
279 | |
280 | /* __uid_t */ | |
e3aa49af MS |
281 | uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
282 | TYPE_LENGTH (uint_type), "__uid_t"); | |
4aa995e1 | 283 | TYPE_TARGET_TYPE (uid_type) = uint_type; |
e9bb382b | 284 | TYPE_TARGET_STUB (uid_type) = 1; |
4aa995e1 PA |
285 | |
286 | /* __clock_t */ | |
e3aa49af MS |
287 | clock_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
288 | TYPE_LENGTH (long_type), "__clock_t"); | |
4aa995e1 | 289 | TYPE_TARGET_TYPE (clock_type) = long_type; |
e9bb382b | 290 | TYPE_TARGET_STUB (clock_type) = 1; |
4aa995e1 PA |
291 | |
292 | /* _sifields */ | |
e9bb382b | 293 | sifields_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); |
4aa995e1 PA |
294 | |
295 | { | |
296 | const int si_max_size = 128; | |
297 | int si_pad_size; | |
298 | int size_of_int = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT; | |
299 | ||
300 | /* _pad */ | |
301 | if (gdbarch_ptr_bit (gdbarch) == 64) | |
302 | si_pad_size = (si_max_size / size_of_int) - 4; | |
303 | else | |
304 | si_pad_size = (si_max_size / size_of_int) - 3; | |
305 | append_composite_type_field (sifields_type, "_pad", | |
306 | init_vector_type (int_type, si_pad_size)); | |
307 | } | |
308 | ||
309 | /* _kill */ | |
e9bb382b | 310 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
311 | append_composite_type_field (type, "si_pid", pid_type); |
312 | append_composite_type_field (type, "si_uid", uid_type); | |
313 | append_composite_type_field (sifields_type, "_kill", type); | |
314 | ||
315 | /* _timer */ | |
e9bb382b | 316 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
317 | append_composite_type_field (type, "si_tid", int_type); |
318 | append_composite_type_field (type, "si_overrun", int_type); | |
319 | append_composite_type_field (type, "si_sigval", sigval_type); | |
320 | append_composite_type_field (sifields_type, "_timer", type); | |
321 | ||
322 | /* _rt */ | |
e9bb382b | 323 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
324 | append_composite_type_field (type, "si_pid", pid_type); |
325 | append_composite_type_field (type, "si_uid", uid_type); | |
326 | append_composite_type_field (type, "si_sigval", sigval_type); | |
327 | append_composite_type_field (sifields_type, "_rt", type); | |
328 | ||
329 | /* _sigchld */ | |
e9bb382b | 330 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
331 | append_composite_type_field (type, "si_pid", pid_type); |
332 | append_composite_type_field (type, "si_uid", uid_type); | |
333 | append_composite_type_field (type, "si_status", int_type); | |
334 | append_composite_type_field (type, "si_utime", clock_type); | |
335 | append_composite_type_field (type, "si_stime", clock_type); | |
336 | append_composite_type_field (sifields_type, "_sigchld", type); | |
337 | ||
338 | /* _sigfault */ | |
e9bb382b | 339 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
340 | append_composite_type_field (type, "si_addr", void_ptr_type); |
341 | append_composite_type_field (sifields_type, "_sigfault", type); | |
342 | ||
343 | /* _sigpoll */ | |
e9bb382b | 344 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
345 | append_composite_type_field (type, "si_band", long_type); |
346 | append_composite_type_field (type, "si_fd", int_type); | |
347 | append_composite_type_field (sifields_type, "_sigpoll", type); | |
348 | ||
349 | /* struct siginfo */ | |
e9bb382b | 350 | siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
351 | TYPE_NAME (siginfo_type) = xstrdup ("siginfo"); |
352 | append_composite_type_field (siginfo_type, "si_signo", int_type); | |
353 | append_composite_type_field (siginfo_type, "si_errno", int_type); | |
354 | append_composite_type_field (siginfo_type, "si_code", int_type); | |
355 | append_composite_type_field_aligned (siginfo_type, | |
356 | "_sifields", sifields_type, | |
357 | TYPE_LENGTH (long_type)); | |
358 | ||
06253dd3 JK |
359 | linux_gdbarch_data->siginfo_type = siginfo_type; |
360 | ||
4aa995e1 PA |
361 | return siginfo_type; |
362 | } | |
6b3ae818 | 363 | |
c01cbb3d YQ |
364 | /* Return true if the target is running on uClinux instead of normal |
365 | Linux kernel. */ | |
366 | ||
367 | int | |
368 | linux_is_uclinux (void) | |
6c95b8df | 369 | { |
6c95b8df | 370 | CORE_ADDR dummy; |
6c95b8df | 371 | |
c01cbb3d YQ |
372 | return (target_auxv_search (¤t_target, AT_NULL, &dummy) > 0 |
373 | && target_auxv_search (¤t_target, AT_PAGESZ, &dummy) == 0); | |
374 | } | |
6c95b8df | 375 | |
c01cbb3d YQ |
376 | static int |
377 | linux_has_shared_address_space (struct gdbarch *gdbarch) | |
378 | { | |
379 | return linux_is_uclinux (); | |
6c95b8df | 380 | } |
a5ee0f0c PA |
381 | |
382 | /* This is how we want PTIDs from core files to be printed. */ | |
383 | ||
384 | static char * | |
385 | linux_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid) | |
386 | { | |
387 | static char buf[80]; | |
388 | ||
389 | if (ptid_get_lwp (ptid) != 0) | |
390 | { | |
391 | snprintf (buf, sizeof (buf), "LWP %ld", ptid_get_lwp (ptid)); | |
392 | return buf; | |
393 | } | |
394 | ||
395 | return normal_pid_to_str (ptid); | |
396 | } | |
397 | ||
3030c96e UW |
398 | /* Service function for corefiles and info proc. */ |
399 | ||
400 | static void | |
401 | read_mapping (const char *line, | |
402 | ULONGEST *addr, ULONGEST *endaddr, | |
403 | const char **permissions, size_t *permissions_len, | |
404 | ULONGEST *offset, | |
405 | const char **device, size_t *device_len, | |
406 | ULONGEST *inode, | |
407 | const char **filename) | |
408 | { | |
409 | const char *p = line; | |
410 | ||
411 | *addr = strtoulst (p, &p, 16); | |
412 | if (*p == '-') | |
413 | p++; | |
414 | *endaddr = strtoulst (p, &p, 16); | |
415 | ||
529480d0 | 416 | p = skip_spaces_const (p); |
3030c96e UW |
417 | *permissions = p; |
418 | while (*p && !isspace (*p)) | |
419 | p++; | |
420 | *permissions_len = p - *permissions; | |
421 | ||
422 | *offset = strtoulst (p, &p, 16); | |
423 | ||
529480d0 | 424 | p = skip_spaces_const (p); |
3030c96e UW |
425 | *device = p; |
426 | while (*p && !isspace (*p)) | |
427 | p++; | |
428 | *device_len = p - *device; | |
429 | ||
430 | *inode = strtoulst (p, &p, 10); | |
431 | ||
529480d0 | 432 | p = skip_spaces_const (p); |
3030c96e UW |
433 | *filename = p; |
434 | } | |
435 | ||
df8411da SDJ |
436 | /* Helper function to decode the "VmFlags" field in /proc/PID/smaps. |
437 | ||
438 | This function was based on the documentation found on | |
439 | <Documentation/filesystems/proc.txt>, on the Linux kernel. | |
440 | ||
441 | Linux kernels before commit | |
442 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10) do not have this | |
443 | field on smaps. */ | |
444 | ||
445 | static void | |
446 | decode_vmflags (char *p, struct smaps_vmflags *v) | |
447 | { | |
d249a14a | 448 | char *saveptr = NULL; |
df8411da SDJ |
449 | const char *s; |
450 | ||
451 | v->initialized_p = 1; | |
452 | p = skip_to_space (p); | |
453 | p = skip_spaces (p); | |
454 | ||
455 | for (s = strtok_r (p, " ", &saveptr); | |
456 | s != NULL; | |
457 | s = strtok_r (NULL, " ", &saveptr)) | |
458 | { | |
459 | if (strcmp (s, "io") == 0) | |
460 | v->io_page = 1; | |
461 | else if (strcmp (s, "ht") == 0) | |
462 | v->uses_huge_tlb = 1; | |
463 | else if (strcmp (s, "dd") == 0) | |
464 | v->exclude_coredump = 1; | |
465 | else if (strcmp (s, "sh") == 0) | |
466 | v->shared_mapping = 1; | |
467 | } | |
468 | } | |
469 | ||
470 | /* Return 1 if the memory mapping is anonymous, 0 otherwise. | |
471 | ||
472 | FILENAME is the name of the file present in the first line of the | |
473 | memory mapping, in the "/proc/PID/smaps" output. For example, if | |
474 | the first line is: | |
475 | ||
476 | 7fd0ca877000-7fd0d0da0000 r--p 00000000 fd:02 2100770 /path/to/file | |
477 | ||
478 | Then FILENAME will be "/path/to/file". */ | |
479 | ||
480 | static int | |
481 | mapping_is_anonymous_p (const char *filename) | |
482 | { | |
483 | static regex_t dev_zero_regex, shmem_file_regex, file_deleted_regex; | |
484 | static int init_regex_p = 0; | |
485 | ||
486 | if (!init_regex_p) | |
487 | { | |
488 | struct cleanup *c = make_cleanup (null_cleanup, NULL); | |
489 | ||
490 | /* Let's be pessimistic and assume there will be an error while | |
491 | compiling the regex'es. */ | |
492 | init_regex_p = -1; | |
493 | ||
494 | /* DEV_ZERO_REGEX matches "/dev/zero" filenames (with or | |
495 | without the "(deleted)" string in the end). We know for | |
496 | sure, based on the Linux kernel code, that memory mappings | |
497 | whose associated filename is "/dev/zero" are guaranteed to be | |
498 | MAP_ANONYMOUS. */ | |
499 | compile_rx_or_error (&dev_zero_regex, "^/dev/zero\\( (deleted)\\)\\?$", | |
500 | _("Could not compile regex to match /dev/zero " | |
501 | "filename")); | |
502 | /* SHMEM_FILE_REGEX matches "/SYSV%08x" filenames (with or | |
503 | without the "(deleted)" string in the end). These filenames | |
504 | refer to shared memory (shmem), and memory mappings | |
505 | associated with them are MAP_ANONYMOUS as well. */ | |
506 | compile_rx_or_error (&shmem_file_regex, | |
507 | "^/\\?SYSV[0-9a-fA-F]\\{8\\}\\( (deleted)\\)\\?$", | |
508 | _("Could not compile regex to match shmem " | |
509 | "filenames")); | |
510 | /* FILE_DELETED_REGEX is a heuristic we use to try to mimic the | |
511 | Linux kernel's 'n_link == 0' code, which is responsible to | |
512 | decide if it is dealing with a 'MAP_SHARED | MAP_ANONYMOUS' | |
513 | mapping. In other words, if FILE_DELETED_REGEX matches, it | |
514 | does not necessarily mean that we are dealing with an | |
515 | anonymous shared mapping. However, there is no easy way to | |
516 | detect this currently, so this is the best approximation we | |
517 | have. | |
518 | ||
519 | As a result, GDB will dump readonly pages of deleted | |
520 | executables when using the default value of coredump_filter | |
521 | (0x33), while the Linux kernel will not dump those pages. | |
522 | But we can live with that. */ | |
523 | compile_rx_or_error (&file_deleted_regex, " (deleted)$", | |
524 | _("Could not compile regex to match " | |
525 | "'<file> (deleted)'")); | |
526 | /* We will never release these regexes, so just discard the | |
527 | cleanups. */ | |
528 | discard_cleanups (c); | |
529 | ||
530 | /* If we reached this point, then everything succeeded. */ | |
531 | init_regex_p = 1; | |
532 | } | |
533 | ||
534 | if (init_regex_p == -1) | |
535 | { | |
536 | const char deleted[] = " (deleted)"; | |
537 | size_t del_len = sizeof (deleted) - 1; | |
538 | size_t filename_len = strlen (filename); | |
539 | ||
540 | /* There was an error while compiling the regex'es above. In | |
541 | order to try to give some reliable information to the caller, | |
542 | we just try to find the string " (deleted)" in the filename. | |
543 | If we managed to find it, then we assume the mapping is | |
544 | anonymous. */ | |
545 | return (filename_len >= del_len | |
546 | && strcmp (filename + filename_len - del_len, deleted) == 0); | |
547 | } | |
548 | ||
549 | if (*filename == '\0' | |
550 | || regexec (&dev_zero_regex, filename, 0, NULL, 0) == 0 | |
551 | || regexec (&shmem_file_regex, filename, 0, NULL, 0) == 0 | |
552 | || regexec (&file_deleted_regex, filename, 0, NULL, 0) == 0) | |
553 | return 1; | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
558 | /* Return 0 if the memory mapping (which is related to FILTERFLAGS, V, | |
559 | MAYBE_PRIVATE_P, and MAPPING_ANONYMOUS_P) should not be dumped, or | |
560 | greater than 0 if it should. | |
561 | ||
562 | In a nutshell, this is the logic that we follow in order to decide | |
563 | if a mapping should be dumped or not. | |
564 | ||
565 | - If the mapping is associated to a file whose name ends with | |
566 | " (deleted)", or if the file is "/dev/zero", or if it is | |
567 | "/SYSV%08x" (shared memory), or if there is no file associated | |
568 | with it, or if the AnonHugePages: or the Anonymous: fields in the | |
569 | /proc/PID/smaps have contents, then GDB considers this mapping to | |
570 | be anonymous. Otherwise, GDB considers this mapping to be a | |
571 | file-backed mapping (because there will be a file associated with | |
572 | it). | |
573 | ||
574 | It is worth mentioning that, from all those checks described | |
575 | above, the most fragile is the one to see if the file name ends | |
576 | with " (deleted)". This does not necessarily mean that the | |
577 | mapping is anonymous, because the deleted file associated with | |
578 | the mapping may have been a hard link to another file, for | |
579 | example. The Linux kernel checks to see if "i_nlink == 0", but | |
580 | GDB cannot easily (and normally) do this check (iff running as | |
581 | root, it could find the mapping in /proc/PID/map_files/ and | |
582 | determine whether there still are other hard links to the | |
583 | inode/file). Therefore, we made a compromise here, and we assume | |
584 | that if the file name ends with " (deleted)", then the mapping is | |
585 | indeed anonymous. FWIW, this is something the Linux kernel could | |
586 | do better: expose this information in a more direct way. | |
587 | ||
588 | - If we see the flag "sh" in the "VmFlags:" field (in | |
589 | /proc/PID/smaps), then certainly the memory mapping is shared | |
590 | (VM_SHARED). If we have access to the VmFlags, and we don't see | |
591 | the "sh" there, then certainly the mapping is private. However, | |
592 | Linux kernels before commit | |
593 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10) do not have the | |
594 | "VmFlags:" field; in that case, we use another heuristic: if we | |
595 | see 'p' in the permission flags, then we assume that the mapping | |
596 | is private, even though the presence of the 's' flag there would | |
597 | mean VM_MAYSHARE, which means the mapping could still be private. | |
598 | This should work OK enough, however. */ | |
599 | ||
600 | static int | |
601 | dump_mapping_p (unsigned int filterflags, const struct smaps_vmflags *v, | |
602 | int maybe_private_p, int mapping_anon_p, int mapping_file_p, | |
603 | const char *filename) | |
604 | { | |
605 | /* Initially, we trust in what we received from our caller. This | |
606 | value may not be very precise (i.e., it was probably gathered | |
607 | from the permission line in the /proc/PID/smaps list, which | |
608 | actually refers to VM_MAYSHARE, and not VM_SHARED), but it is | |
609 | what we have until we take a look at the "VmFlags:" field | |
610 | (assuming that the version of the Linux kernel being used | |
611 | supports it, of course). */ | |
612 | int private_p = maybe_private_p; | |
613 | ||
614 | /* We always dump vDSO and vsyscall mappings, because it's likely that | |
615 | there'll be no file to read the contents from at core load time. | |
616 | The kernel does the same. */ | |
617 | if (strcmp ("[vdso]", filename) == 0 | |
618 | || strcmp ("[vsyscall]", filename) == 0) | |
619 | return 1; | |
620 | ||
621 | if (v->initialized_p) | |
622 | { | |
623 | /* We never dump I/O mappings. */ | |
624 | if (v->io_page) | |
625 | return 0; | |
626 | ||
627 | /* Check if we should exclude this mapping. */ | |
628 | if (v->exclude_coredump) | |
629 | return 0; | |
630 | ||
631 | /* Update our notion of whether this mapping is shared or | |
632 | private based on a trustworthy value. */ | |
633 | private_p = !v->shared_mapping; | |
634 | ||
635 | /* HugeTLB checking. */ | |
636 | if (v->uses_huge_tlb) | |
637 | { | |
638 | if ((private_p && (filterflags & COREFILTER_HUGETLB_PRIVATE)) | |
639 | || (!private_p && (filterflags & COREFILTER_HUGETLB_SHARED))) | |
640 | return 1; | |
641 | ||
642 | return 0; | |
643 | } | |
644 | } | |
645 | ||
646 | if (private_p) | |
647 | { | |
648 | if (mapping_anon_p && mapping_file_p) | |
649 | { | |
650 | /* This is a special situation. It can happen when we see a | |
651 | mapping that is file-backed, but that contains anonymous | |
652 | pages. */ | |
653 | return ((filterflags & COREFILTER_ANON_PRIVATE) != 0 | |
654 | || (filterflags & COREFILTER_MAPPED_PRIVATE) != 0); | |
655 | } | |
656 | else if (mapping_anon_p) | |
657 | return (filterflags & COREFILTER_ANON_PRIVATE) != 0; | |
658 | else | |
659 | return (filterflags & COREFILTER_MAPPED_PRIVATE) != 0; | |
660 | } | |
661 | else | |
662 | { | |
663 | if (mapping_anon_p && mapping_file_p) | |
664 | { | |
665 | /* This is a special situation. It can happen when we see a | |
666 | mapping that is file-backed, but that contains anonymous | |
667 | pages. */ | |
668 | return ((filterflags & COREFILTER_ANON_SHARED) != 0 | |
669 | || (filterflags & COREFILTER_MAPPED_SHARED) != 0); | |
670 | } | |
671 | else if (mapping_anon_p) | |
672 | return (filterflags & COREFILTER_ANON_SHARED) != 0; | |
673 | else | |
674 | return (filterflags & COREFILTER_MAPPED_SHARED) != 0; | |
675 | } | |
676 | } | |
677 | ||
3030c96e UW |
678 | /* Implement the "info proc" command. */ |
679 | ||
680 | static void | |
7bc112c1 | 681 | linux_info_proc (struct gdbarch *gdbarch, const char *args, |
3030c96e UW |
682 | enum info_proc_what what) |
683 | { | |
684 | /* A long is used for pid instead of an int to avoid a loss of precision | |
685 | compiler warning from the output of strtoul. */ | |
686 | long pid; | |
687 | int cmdline_f = (what == IP_MINIMAL || what == IP_CMDLINE || what == IP_ALL); | |
688 | int cwd_f = (what == IP_MINIMAL || what == IP_CWD || what == IP_ALL); | |
689 | int exe_f = (what == IP_MINIMAL || what == IP_EXE || what == IP_ALL); | |
690 | int mappings_f = (what == IP_MAPPINGS || what == IP_ALL); | |
691 | int status_f = (what == IP_STATUS || what == IP_ALL); | |
692 | int stat_f = (what == IP_STAT || what == IP_ALL); | |
693 | char filename[100]; | |
001f13d8 | 694 | char *data; |
3030c96e UW |
695 | int target_errno; |
696 | ||
697 | if (args && isdigit (args[0])) | |
7bc112c1 TT |
698 | { |
699 | char *tem; | |
700 | ||
701 | pid = strtoul (args, &tem, 10); | |
702 | args = tem; | |
703 | } | |
3030c96e UW |
704 | else |
705 | { | |
706 | if (!target_has_execution) | |
707 | error (_("No current process: you must name one.")); | |
708 | if (current_inferior ()->fake_pid_p) | |
709 | error (_("Can't determine the current process's PID: you must name one.")); | |
710 | ||
711 | pid = current_inferior ()->pid; | |
712 | } | |
713 | ||
7bc112c1 | 714 | args = skip_spaces_const (args); |
3030c96e UW |
715 | if (args && args[0]) |
716 | error (_("Too many parameters: %s"), args); | |
717 | ||
718 | printf_filtered (_("process %ld\n"), pid); | |
719 | if (cmdline_f) | |
720 | { | |
721 | xsnprintf (filename, sizeof filename, "/proc/%ld/cmdline", pid); | |
722 | data = target_fileio_read_stralloc (filename); | |
723 | if (data) | |
724 | { | |
725 | struct cleanup *cleanup = make_cleanup (xfree, data); | |
726 | printf_filtered ("cmdline = '%s'\n", data); | |
727 | do_cleanups (cleanup); | |
728 | } | |
729 | else | |
730 | warning (_("unable to open /proc file '%s'"), filename); | |
731 | } | |
732 | if (cwd_f) | |
733 | { | |
734 | xsnprintf (filename, sizeof filename, "/proc/%ld/cwd", pid); | |
735 | data = target_fileio_readlink (filename, &target_errno); | |
736 | if (data) | |
737 | { | |
738 | struct cleanup *cleanup = make_cleanup (xfree, data); | |
739 | printf_filtered ("cwd = '%s'\n", data); | |
740 | do_cleanups (cleanup); | |
741 | } | |
742 | else | |
743 | warning (_("unable to read link '%s'"), filename); | |
744 | } | |
745 | if (exe_f) | |
746 | { | |
747 | xsnprintf (filename, sizeof filename, "/proc/%ld/exe", pid); | |
748 | data = target_fileio_readlink (filename, &target_errno); | |
749 | if (data) | |
750 | { | |
751 | struct cleanup *cleanup = make_cleanup (xfree, data); | |
752 | printf_filtered ("exe = '%s'\n", data); | |
753 | do_cleanups (cleanup); | |
754 | } | |
755 | else | |
756 | warning (_("unable to read link '%s'"), filename); | |
757 | } | |
758 | if (mappings_f) | |
759 | { | |
760 | xsnprintf (filename, sizeof filename, "/proc/%ld/maps", pid); | |
761 | data = target_fileio_read_stralloc (filename); | |
762 | if (data) | |
763 | { | |
764 | struct cleanup *cleanup = make_cleanup (xfree, data); | |
765 | char *line; | |
766 | ||
767 | printf_filtered (_("Mapped address spaces:\n\n")); | |
768 | if (gdbarch_addr_bit (gdbarch) == 32) | |
769 | { | |
770 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
771 | "Start Addr", | |
772 | " End Addr", | |
773 | " Size", " Offset", "objfile"); | |
774 | } | |
775 | else | |
776 | { | |
777 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
778 | "Start Addr", | |
779 | " End Addr", | |
780 | " Size", " Offset", "objfile"); | |
781 | } | |
782 | ||
783 | for (line = strtok (data, "\n"); line; line = strtok (NULL, "\n")) | |
784 | { | |
785 | ULONGEST addr, endaddr, offset, inode; | |
786 | const char *permissions, *device, *filename; | |
787 | size_t permissions_len, device_len; | |
788 | ||
789 | read_mapping (line, &addr, &endaddr, | |
790 | &permissions, &permissions_len, | |
791 | &offset, &device, &device_len, | |
792 | &inode, &filename); | |
793 | ||
794 | if (gdbarch_addr_bit (gdbarch) == 32) | |
795 | { | |
796 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
797 | paddress (gdbarch, addr), | |
798 | paddress (gdbarch, endaddr), | |
799 | hex_string (endaddr - addr), | |
800 | hex_string (offset), | |
801 | *filename? filename : ""); | |
802 | } | |
803 | else | |
804 | { | |
805 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
806 | paddress (gdbarch, addr), | |
807 | paddress (gdbarch, endaddr), | |
808 | hex_string (endaddr - addr), | |
809 | hex_string (offset), | |
810 | *filename? filename : ""); | |
811 | } | |
812 | } | |
813 | ||
814 | do_cleanups (cleanup); | |
815 | } | |
816 | else | |
817 | warning (_("unable to open /proc file '%s'"), filename); | |
818 | } | |
819 | if (status_f) | |
820 | { | |
821 | xsnprintf (filename, sizeof filename, "/proc/%ld/status", pid); | |
822 | data = target_fileio_read_stralloc (filename); | |
823 | if (data) | |
824 | { | |
825 | struct cleanup *cleanup = make_cleanup (xfree, data); | |
826 | puts_filtered (data); | |
827 | do_cleanups (cleanup); | |
828 | } | |
829 | else | |
830 | warning (_("unable to open /proc file '%s'"), filename); | |
831 | } | |
832 | if (stat_f) | |
833 | { | |
834 | xsnprintf (filename, sizeof filename, "/proc/%ld/stat", pid); | |
835 | data = target_fileio_read_stralloc (filename); | |
836 | if (data) | |
837 | { | |
838 | struct cleanup *cleanup = make_cleanup (xfree, data); | |
839 | const char *p = data; | |
3030c96e UW |
840 | |
841 | printf_filtered (_("Process: %s\n"), | |
842 | pulongest (strtoulst (p, &p, 10))); | |
843 | ||
529480d0 | 844 | p = skip_spaces_const (p); |
a71b5a38 | 845 | if (*p == '(') |
3030c96e | 846 | { |
184cd072 JK |
847 | /* ps command also relies on no trailing fields |
848 | ever contain ')'. */ | |
849 | const char *ep = strrchr (p, ')'); | |
a71b5a38 UW |
850 | if (ep != NULL) |
851 | { | |
852 | printf_filtered ("Exec file: %.*s\n", | |
853 | (int) (ep - p - 1), p + 1); | |
854 | p = ep + 1; | |
855 | } | |
3030c96e UW |
856 | } |
857 | ||
529480d0 | 858 | p = skip_spaces_const (p); |
3030c96e UW |
859 | if (*p) |
860 | printf_filtered (_("State: %c\n"), *p++); | |
861 | ||
862 | if (*p) | |
863 | printf_filtered (_("Parent process: %s\n"), | |
864 | pulongest (strtoulst (p, &p, 10))); | |
865 | if (*p) | |
866 | printf_filtered (_("Process group: %s\n"), | |
867 | pulongest (strtoulst (p, &p, 10))); | |
868 | if (*p) | |
869 | printf_filtered (_("Session id: %s\n"), | |
870 | pulongest (strtoulst (p, &p, 10))); | |
871 | if (*p) | |
872 | printf_filtered (_("TTY: %s\n"), | |
873 | pulongest (strtoulst (p, &p, 10))); | |
874 | if (*p) | |
875 | printf_filtered (_("TTY owner process group: %s\n"), | |
876 | pulongest (strtoulst (p, &p, 10))); | |
877 | ||
878 | if (*p) | |
879 | printf_filtered (_("Flags: %s\n"), | |
880 | hex_string (strtoulst (p, &p, 10))); | |
881 | if (*p) | |
882 | printf_filtered (_("Minor faults (no memory page): %s\n"), | |
883 | pulongest (strtoulst (p, &p, 10))); | |
884 | if (*p) | |
885 | printf_filtered (_("Minor faults, children: %s\n"), | |
886 | pulongest (strtoulst (p, &p, 10))); | |
887 | if (*p) | |
888 | printf_filtered (_("Major faults (memory page faults): %s\n"), | |
889 | pulongest (strtoulst (p, &p, 10))); | |
890 | if (*p) | |
891 | printf_filtered (_("Major faults, children: %s\n"), | |
892 | pulongest (strtoulst (p, &p, 10))); | |
893 | if (*p) | |
894 | printf_filtered (_("utime: %s\n"), | |
895 | pulongest (strtoulst (p, &p, 10))); | |
896 | if (*p) | |
897 | printf_filtered (_("stime: %s\n"), | |
898 | pulongest (strtoulst (p, &p, 10))); | |
899 | if (*p) | |
900 | printf_filtered (_("utime, children: %s\n"), | |
901 | pulongest (strtoulst (p, &p, 10))); | |
902 | if (*p) | |
903 | printf_filtered (_("stime, children: %s\n"), | |
904 | pulongest (strtoulst (p, &p, 10))); | |
905 | if (*p) | |
906 | printf_filtered (_("jiffies remaining in current " | |
907 | "time slice: %s\n"), | |
908 | pulongest (strtoulst (p, &p, 10))); | |
909 | if (*p) | |
910 | printf_filtered (_("'nice' value: %s\n"), | |
911 | pulongest (strtoulst (p, &p, 10))); | |
912 | if (*p) | |
913 | printf_filtered (_("jiffies until next timeout: %s\n"), | |
914 | pulongest (strtoulst (p, &p, 10))); | |
915 | if (*p) | |
916 | printf_filtered (_("jiffies until next SIGALRM: %s\n"), | |
917 | pulongest (strtoulst (p, &p, 10))); | |
918 | if (*p) | |
919 | printf_filtered (_("start time (jiffies since " | |
920 | "system boot): %s\n"), | |
921 | pulongest (strtoulst (p, &p, 10))); | |
922 | if (*p) | |
923 | printf_filtered (_("Virtual memory size: %s\n"), | |
924 | pulongest (strtoulst (p, &p, 10))); | |
925 | if (*p) | |
926 | printf_filtered (_("Resident set size: %s\n"), | |
927 | pulongest (strtoulst (p, &p, 10))); | |
928 | if (*p) | |
929 | printf_filtered (_("rlim: %s\n"), | |
930 | pulongest (strtoulst (p, &p, 10))); | |
931 | if (*p) | |
932 | printf_filtered (_("Start of text: %s\n"), | |
933 | hex_string (strtoulst (p, &p, 10))); | |
934 | if (*p) | |
935 | printf_filtered (_("End of text: %s\n"), | |
936 | hex_string (strtoulst (p, &p, 10))); | |
937 | if (*p) | |
938 | printf_filtered (_("Start of stack: %s\n"), | |
939 | hex_string (strtoulst (p, &p, 10))); | |
940 | #if 0 /* Don't know how architecture-dependent the rest is... | |
941 | Anyway the signal bitmap info is available from "status". */ | |
942 | if (*p) | |
943 | printf_filtered (_("Kernel stack pointer: %s\n"), | |
944 | hex_string (strtoulst (p, &p, 10))); | |
945 | if (*p) | |
946 | printf_filtered (_("Kernel instr pointer: %s\n"), | |
947 | hex_string (strtoulst (p, &p, 10))); | |
948 | if (*p) | |
949 | printf_filtered (_("Pending signals bitmap: %s\n"), | |
950 | hex_string (strtoulst (p, &p, 10))); | |
951 | if (*p) | |
952 | printf_filtered (_("Blocked signals bitmap: %s\n"), | |
953 | hex_string (strtoulst (p, &p, 10))); | |
954 | if (*p) | |
955 | printf_filtered (_("Ignored signals bitmap: %s\n"), | |
956 | hex_string (strtoulst (p, &p, 10))); | |
957 | if (*p) | |
958 | printf_filtered (_("Catched signals bitmap: %s\n"), | |
959 | hex_string (strtoulst (p, &p, 10))); | |
960 | if (*p) | |
961 | printf_filtered (_("wchan (system call): %s\n"), | |
962 | hex_string (strtoulst (p, &p, 10))); | |
963 | #endif | |
964 | do_cleanups (cleanup); | |
965 | } | |
966 | else | |
967 | warning (_("unable to open /proc file '%s'"), filename); | |
968 | } | |
969 | } | |
970 | ||
451b7c33 TT |
971 | /* Implement "info proc mappings" for a corefile. */ |
972 | ||
973 | static void | |
7bc112c1 | 974 | linux_core_info_proc_mappings (struct gdbarch *gdbarch, const char *args) |
451b7c33 TT |
975 | { |
976 | asection *section; | |
977 | ULONGEST count, page_size; | |
978 | unsigned char *descdata, *filenames, *descend, *contents; | |
979 | size_t note_size; | |
980 | unsigned int addr_size_bits, addr_size; | |
981 | struct cleanup *cleanup; | |
982 | struct gdbarch *core_gdbarch = gdbarch_from_bfd (core_bfd); | |
983 | /* We assume this for reading 64-bit core files. */ | |
984 | gdb_static_assert (sizeof (ULONGEST) >= 8); | |
985 | ||
986 | section = bfd_get_section_by_name (core_bfd, ".note.linuxcore.file"); | |
987 | if (section == NULL) | |
988 | { | |
989 | warning (_("unable to find mappings in core file")); | |
990 | return; | |
991 | } | |
992 | ||
993 | addr_size_bits = gdbarch_addr_bit (core_gdbarch); | |
994 | addr_size = addr_size_bits / 8; | |
995 | note_size = bfd_get_section_size (section); | |
996 | ||
997 | if (note_size < 2 * addr_size) | |
998 | error (_("malformed core note - too short for header")); | |
999 | ||
1000 | contents = xmalloc (note_size); | |
1001 | cleanup = make_cleanup (xfree, contents); | |
1002 | if (!bfd_get_section_contents (core_bfd, section, contents, 0, note_size)) | |
1003 | error (_("could not get core note contents")); | |
1004 | ||
1005 | descdata = contents; | |
1006 | descend = descdata + note_size; | |
1007 | ||
1008 | if (descdata[note_size - 1] != '\0') | |
1009 | error (_("malformed note - does not end with \\0")); | |
1010 | ||
1011 | count = bfd_get (addr_size_bits, core_bfd, descdata); | |
1012 | descdata += addr_size; | |
1013 | ||
1014 | page_size = bfd_get (addr_size_bits, core_bfd, descdata); | |
1015 | descdata += addr_size; | |
1016 | ||
1017 | if (note_size < 2 * addr_size + count * 3 * addr_size) | |
1018 | error (_("malformed note - too short for supplied file count")); | |
1019 | ||
1020 | printf_filtered (_("Mapped address spaces:\n\n")); | |
1021 | if (gdbarch_addr_bit (gdbarch) == 32) | |
1022 | { | |
1023 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
1024 | "Start Addr", | |
1025 | " End Addr", | |
1026 | " Size", " Offset", "objfile"); | |
1027 | } | |
1028 | else | |
1029 | { | |
1030 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
1031 | "Start Addr", | |
1032 | " End Addr", | |
1033 | " Size", " Offset", "objfile"); | |
1034 | } | |
1035 | ||
1036 | filenames = descdata + count * 3 * addr_size; | |
1037 | while (--count > 0) | |
1038 | { | |
1039 | ULONGEST start, end, file_ofs; | |
1040 | ||
1041 | if (filenames == descend) | |
1042 | error (_("malformed note - filenames end too early")); | |
1043 | ||
1044 | start = bfd_get (addr_size_bits, core_bfd, descdata); | |
1045 | descdata += addr_size; | |
1046 | end = bfd_get (addr_size_bits, core_bfd, descdata); | |
1047 | descdata += addr_size; | |
1048 | file_ofs = bfd_get (addr_size_bits, core_bfd, descdata); | |
1049 | descdata += addr_size; | |
1050 | ||
1051 | file_ofs *= page_size; | |
1052 | ||
1053 | if (gdbarch_addr_bit (gdbarch) == 32) | |
1054 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
1055 | paddress (gdbarch, start), | |
1056 | paddress (gdbarch, end), | |
1057 | hex_string (end - start), | |
1058 | hex_string (file_ofs), | |
1059 | filenames); | |
1060 | else | |
1061 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
1062 | paddress (gdbarch, start), | |
1063 | paddress (gdbarch, end), | |
1064 | hex_string (end - start), | |
1065 | hex_string (file_ofs), | |
1066 | filenames); | |
1067 | ||
1068 | filenames += 1 + strlen ((char *) filenames); | |
1069 | } | |
1070 | ||
1071 | do_cleanups (cleanup); | |
1072 | } | |
1073 | ||
1074 | /* Implement "info proc" for a corefile. */ | |
1075 | ||
1076 | static void | |
7bc112c1 | 1077 | linux_core_info_proc (struct gdbarch *gdbarch, const char *args, |
451b7c33 TT |
1078 | enum info_proc_what what) |
1079 | { | |
1080 | int exe_f = (what == IP_MINIMAL || what == IP_EXE || what == IP_ALL); | |
1081 | int mappings_f = (what == IP_MAPPINGS || what == IP_ALL); | |
1082 | ||
1083 | if (exe_f) | |
1084 | { | |
1085 | const char *exe; | |
1086 | ||
1087 | exe = bfd_core_file_failing_command (core_bfd); | |
1088 | if (exe != NULL) | |
1089 | printf_filtered ("exe = '%s'\n", exe); | |
1090 | else | |
1091 | warning (_("unable to find command name in core file")); | |
1092 | } | |
1093 | ||
1094 | if (mappings_f) | |
1095 | linux_core_info_proc_mappings (gdbarch, args); | |
1096 | ||
1097 | if (!exe_f && !mappings_f) | |
1098 | error (_("unable to handle request")); | |
1099 | } | |
1100 | ||
1101 | typedef int linux_find_memory_region_ftype (ULONGEST vaddr, ULONGEST size, | |
1102 | ULONGEST offset, ULONGEST inode, | |
1103 | int read, int write, | |
1104 | int exec, int modified, | |
1105 | const char *filename, | |
1106 | void *data); | |
1107 | ||
35c2fab7 UW |
1108 | /* List memory regions in the inferior for a corefile. */ |
1109 | ||
1110 | static int | |
451b7c33 TT |
1111 | linux_find_memory_regions_full (struct gdbarch *gdbarch, |
1112 | linux_find_memory_region_ftype *func, | |
1113 | void *obfd) | |
35c2fab7 | 1114 | { |
d1794952 | 1115 | char mapsfilename[100]; |
df8411da SDJ |
1116 | char coredumpfilter_name[100]; |
1117 | char *data, *coredumpfilterdata; | |
1118 | pid_t pid; | |
1119 | /* Default dump behavior of coredump_filter (0x33), according to | |
1120 | Documentation/filesystems/proc.txt from the Linux kernel | |
1121 | tree. */ | |
1122 | unsigned int filterflags = (COREFILTER_ANON_PRIVATE | |
1123 | | COREFILTER_ANON_SHARED | |
1124 | | COREFILTER_ELF_HEADERS | |
1125 | | COREFILTER_HUGETLB_PRIVATE); | |
35c2fab7 UW |
1126 | |
1127 | /* We need to know the real target PID to access /proc. */ | |
1128 | if (current_inferior ()->fake_pid_p) | |
1129 | return 1; | |
1130 | ||
df8411da SDJ |
1131 | pid = current_inferior ()->pid; |
1132 | ||
1133 | if (use_coredump_filter) | |
1134 | { | |
1135 | xsnprintf (coredumpfilter_name, sizeof (coredumpfilter_name), | |
1136 | "/proc/%d/coredump_filter", pid); | |
1137 | coredumpfilterdata = target_fileio_read_stralloc (coredumpfilter_name); | |
1138 | if (coredumpfilterdata != NULL) | |
1139 | { | |
1140 | sscanf (coredumpfilterdata, "%x", &filterflags); | |
1141 | xfree (coredumpfilterdata); | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | xsnprintf (mapsfilename, sizeof mapsfilename, "/proc/%d/smaps", pid); | |
d1794952 | 1146 | data = target_fileio_read_stralloc (mapsfilename); |
4f69f4c2 JK |
1147 | if (data == NULL) |
1148 | { | |
1149 | /* Older Linux kernels did not support /proc/PID/smaps. */ | |
df8411da | 1150 | xsnprintf (mapsfilename, sizeof mapsfilename, "/proc/%d/maps", pid); |
d1794952 | 1151 | data = target_fileio_read_stralloc (mapsfilename); |
4f69f4c2 | 1152 | } |
df8411da SDJ |
1153 | |
1154 | if (data != NULL) | |
35c2fab7 UW |
1155 | { |
1156 | struct cleanup *cleanup = make_cleanup (xfree, data); | |
df8411da | 1157 | char *line, *t; |
35c2fab7 | 1158 | |
df8411da SDJ |
1159 | line = strtok_r (data, "\n", &t); |
1160 | while (line != NULL) | |
35c2fab7 UW |
1161 | { |
1162 | ULONGEST addr, endaddr, offset, inode; | |
1163 | const char *permissions, *device, *filename; | |
df8411da | 1164 | struct smaps_vmflags v; |
35c2fab7 | 1165 | size_t permissions_len, device_len; |
52e48b36 | 1166 | int read, write, exec, priv; |
df8411da SDJ |
1167 | int has_anonymous = 0; |
1168 | int should_dump_p = 0; | |
1169 | int mapping_anon_p; | |
1170 | int mapping_file_p; | |
35c2fab7 | 1171 | |
df8411da | 1172 | memset (&v, 0, sizeof (v)); |
35c2fab7 UW |
1173 | read_mapping (line, &addr, &endaddr, &permissions, &permissions_len, |
1174 | &offset, &device, &device_len, &inode, &filename); | |
df8411da SDJ |
1175 | mapping_anon_p = mapping_is_anonymous_p (filename); |
1176 | /* If the mapping is not anonymous, then we can consider it | |
1177 | to be file-backed. These two states (anonymous or | |
1178 | file-backed) seem to be exclusive, but they can actually | |
1179 | coexist. For example, if a file-backed mapping has | |
1180 | "Anonymous:" pages (see more below), then the Linux | |
1181 | kernel will dump this mapping when the user specified | |
1182 | that she only wants anonymous mappings in the corefile | |
1183 | (*even* when she explicitly disabled the dumping of | |
1184 | file-backed mappings). */ | |
1185 | mapping_file_p = !mapping_anon_p; | |
35c2fab7 UW |
1186 | |
1187 | /* Decode permissions. */ | |
1188 | read = (memchr (permissions, 'r', permissions_len) != 0); | |
1189 | write = (memchr (permissions, 'w', permissions_len) != 0); | |
1190 | exec = (memchr (permissions, 'x', permissions_len) != 0); | |
df8411da SDJ |
1191 | /* 'private' here actually means VM_MAYSHARE, and not |
1192 | VM_SHARED. In order to know if a mapping is really | |
1193 | private or not, we must check the flag "sh" in the | |
1194 | VmFlags field. This is done by decode_vmflags. However, | |
1195 | if we are using a Linux kernel released before the commit | |
1196 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10), we will | |
1197 | not have the VmFlags there. In this case, there is | |
1198 | really no way to know if we are dealing with VM_SHARED, | |
1199 | so we just assume that VM_MAYSHARE is enough. */ | |
52e48b36 | 1200 | priv = memchr (permissions, 'p', permissions_len) != 0; |
df8411da SDJ |
1201 | |
1202 | /* Try to detect if region should be dumped by parsing smaps | |
1203 | counters. */ | |
1204 | for (line = strtok_r (NULL, "\n", &t); | |
1205 | line != NULL && line[0] >= 'A' && line[0] <= 'Z'; | |
1206 | line = strtok_r (NULL, "\n", &t)) | |
4f69f4c2 JK |
1207 | { |
1208 | char keyword[64 + 1]; | |
4f69f4c2 | 1209 | |
9ead1b84 | 1210 | if (sscanf (line, "%64s", keyword) != 1) |
4f69f4c2 | 1211 | { |
d1794952 | 1212 | warning (_("Error parsing {s,}maps file '%s'"), mapsfilename); |
4f69f4c2 JK |
1213 | break; |
1214 | } | |
df8411da | 1215 | |
4f69f4c2 | 1216 | if (strcmp (keyword, "Anonymous:") == 0) |
df8411da SDJ |
1217 | { |
1218 | /* Older Linux kernels did not support the | |
1219 | "Anonymous:" counter. Check it here. */ | |
1220 | has_anonymous = 1; | |
1221 | } | |
1222 | else if (strcmp (keyword, "VmFlags:") == 0) | |
1223 | decode_vmflags (line, &v); | |
1224 | ||
1225 | if (strcmp (keyword, "AnonHugePages:") == 0 | |
9ead1b84 JK |
1226 | || strcmp (keyword, "Anonymous:") == 0) |
1227 | { | |
1228 | unsigned long number; | |
1229 | ||
1230 | if (sscanf (line, "%*s%lu", &number) != 1) | |
1231 | { | |
1232 | warning (_("Error parsing {s,}maps file '%s' number"), | |
1233 | mapsfilename); | |
1234 | break; | |
1235 | } | |
df8411da SDJ |
1236 | if (number > 0) |
1237 | { | |
1238 | /* Even if we are dealing with a file-backed | |
1239 | mapping, if it contains anonymous pages we | |
1240 | consider it to be *also* an anonymous | |
1241 | mapping, because this is what the Linux | |
1242 | kernel does: | |
1243 | ||
1244 | // Dump segments that have been written to. | |
1245 | if (vma->anon_vma && FILTER(ANON_PRIVATE)) | |
1246 | goto whole; | |
1247 | ||
1248 | Note that if the mapping is already marked as | |
1249 | file-backed (i.e., mapping_file_p is | |
1250 | non-zero), then this is a special case, and | |
1251 | this mapping will be dumped either when the | |
1252 | user wants to dump file-backed *or* anonymous | |
1253 | mappings. */ | |
1254 | mapping_anon_p = 1; | |
1255 | } | |
9ead1b84 | 1256 | } |
4f69f4c2 JK |
1257 | } |
1258 | ||
df8411da | 1259 | if (has_anonymous) |
52e48b36 | 1260 | should_dump_p = dump_mapping_p (filterflags, &v, priv, |
df8411da SDJ |
1261 | mapping_anon_p, mapping_file_p, |
1262 | filename); | |
1263 | else | |
1264 | { | |
1265 | /* Older Linux kernels did not support the "Anonymous:" counter. | |
1266 | If it is missing, we can't be sure - dump all the pages. */ | |
1267 | should_dump_p = 1; | |
1268 | } | |
4f69f4c2 | 1269 | |
35c2fab7 | 1270 | /* Invoke the callback function to create the corefile segment. */ |
df8411da SDJ |
1271 | if (should_dump_p) |
1272 | func (addr, endaddr - addr, offset, inode, | |
1273 | read, write, exec, 1, /* MODIFIED is true because we | |
1274 | want to dump the mapping. */ | |
1275 | filename, obfd); | |
35c2fab7 UW |
1276 | } |
1277 | ||
1278 | do_cleanups (cleanup); | |
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | return 1; | |
1283 | } | |
1284 | ||
451b7c33 TT |
1285 | /* A structure for passing information through |
1286 | linux_find_memory_regions_full. */ | |
1287 | ||
1288 | struct linux_find_memory_regions_data | |
1289 | { | |
1290 | /* The original callback. */ | |
1291 | ||
1292 | find_memory_region_ftype func; | |
1293 | ||
1294 | /* The original datum. */ | |
1295 | ||
1296 | void *obfd; | |
1297 | }; | |
1298 | ||
1299 | /* A callback for linux_find_memory_regions that converts between the | |
1300 | "full"-style callback and find_memory_region_ftype. */ | |
1301 | ||
1302 | static int | |
1303 | linux_find_memory_regions_thunk (ULONGEST vaddr, ULONGEST size, | |
1304 | ULONGEST offset, ULONGEST inode, | |
1305 | int read, int write, int exec, int modified, | |
1306 | const char *filename, void *arg) | |
1307 | { | |
1308 | struct linux_find_memory_regions_data *data = arg; | |
1309 | ||
1310 | return data->func (vaddr, size, read, write, exec, modified, data->obfd); | |
1311 | } | |
1312 | ||
1313 | /* A variant of linux_find_memory_regions_full that is suitable as the | |
1314 | gdbarch find_memory_regions method. */ | |
1315 | ||
1316 | static int | |
1317 | linux_find_memory_regions (struct gdbarch *gdbarch, | |
1318 | find_memory_region_ftype func, void *obfd) | |
1319 | { | |
1320 | struct linux_find_memory_regions_data data; | |
1321 | ||
1322 | data.func = func; | |
1323 | data.obfd = obfd; | |
1324 | ||
1325 | return linux_find_memory_regions_full (gdbarch, | |
1326 | linux_find_memory_regions_thunk, | |
1327 | &data); | |
1328 | } | |
1329 | ||
6432734d UW |
1330 | /* Determine which signal stopped execution. */ |
1331 | ||
1332 | static int | |
1333 | find_signalled_thread (struct thread_info *info, void *data) | |
1334 | { | |
a493e3e2 | 1335 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
6432734d UW |
1336 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
1337 | return 1; | |
1338 | ||
1339 | return 0; | |
1340 | } | |
1341 | ||
2ea28649 | 1342 | static enum gdb_signal |
6432734d UW |
1343 | find_stop_signal (void) |
1344 | { | |
1345 | struct thread_info *info = | |
1346 | iterate_over_threads (find_signalled_thread, NULL); | |
1347 | ||
1348 | if (info) | |
1349 | return info->suspend.stop_signal; | |
1350 | else | |
a493e3e2 | 1351 | return GDB_SIGNAL_0; |
6432734d UW |
1352 | } |
1353 | ||
1354 | /* Generate corefile notes for SPU contexts. */ | |
1355 | ||
1356 | static char * | |
1357 | linux_spu_make_corefile_notes (bfd *obfd, char *note_data, int *note_size) | |
1358 | { | |
1359 | static const char *spu_files[] = | |
1360 | { | |
1361 | "object-id", | |
1362 | "mem", | |
1363 | "regs", | |
1364 | "fpcr", | |
1365 | "lslr", | |
1366 | "decr", | |
1367 | "decr_status", | |
1368 | "signal1", | |
1369 | "signal1_type", | |
1370 | "signal2", | |
1371 | "signal2_type", | |
1372 | "event_mask", | |
1373 | "event_status", | |
1374 | "mbox_info", | |
1375 | "ibox_info", | |
1376 | "wbox_info", | |
1377 | "dma_info", | |
1378 | "proxydma_info", | |
1379 | }; | |
1380 | ||
f5656ead | 1381 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
6432734d UW |
1382 | gdb_byte *spu_ids; |
1383 | LONGEST i, j, size; | |
1384 | ||
1385 | /* Determine list of SPU ids. */ | |
1386 | size = target_read_alloc (¤t_target, TARGET_OBJECT_SPU, | |
1387 | NULL, &spu_ids); | |
1388 | ||
1389 | /* Generate corefile notes for each SPU file. */ | |
1390 | for (i = 0; i < size; i += 4) | |
1391 | { | |
1392 | int fd = extract_unsigned_integer (spu_ids + i, 4, byte_order); | |
1393 | ||
1394 | for (j = 0; j < sizeof (spu_files) / sizeof (spu_files[0]); j++) | |
1395 | { | |
1396 | char annex[32], note_name[32]; | |
1397 | gdb_byte *spu_data; | |
1398 | LONGEST spu_len; | |
1399 | ||
1400 | xsnprintf (annex, sizeof annex, "%d/%s", fd, spu_files[j]); | |
1401 | spu_len = target_read_alloc (¤t_target, TARGET_OBJECT_SPU, | |
1402 | annex, &spu_data); | |
1403 | if (spu_len > 0) | |
1404 | { | |
1405 | xsnprintf (note_name, sizeof note_name, "SPU/%s", annex); | |
1406 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
1407 | note_name, NT_SPU, | |
1408 | spu_data, spu_len); | |
1409 | xfree (spu_data); | |
1410 | ||
1411 | if (!note_data) | |
1412 | { | |
1413 | xfree (spu_ids); | |
1414 | return NULL; | |
1415 | } | |
1416 | } | |
1417 | } | |
1418 | } | |
1419 | ||
1420 | if (size > 0) | |
1421 | xfree (spu_ids); | |
1422 | ||
1423 | return note_data; | |
1424 | } | |
1425 | ||
451b7c33 TT |
1426 | /* This is used to pass information from |
1427 | linux_make_mappings_corefile_notes through | |
1428 | linux_find_memory_regions_full. */ | |
1429 | ||
1430 | struct linux_make_mappings_data | |
1431 | { | |
1432 | /* Number of files mapped. */ | |
1433 | ULONGEST file_count; | |
1434 | ||
1435 | /* The obstack for the main part of the data. */ | |
1436 | struct obstack *data_obstack; | |
1437 | ||
1438 | /* The filename obstack. */ | |
1439 | struct obstack *filename_obstack; | |
1440 | ||
1441 | /* The architecture's "long" type. */ | |
1442 | struct type *long_type; | |
1443 | }; | |
1444 | ||
1445 | static linux_find_memory_region_ftype linux_make_mappings_callback; | |
1446 | ||
1447 | /* A callback for linux_find_memory_regions_full that updates the | |
1448 | mappings data for linux_make_mappings_corefile_notes. */ | |
1449 | ||
1450 | static int | |
1451 | linux_make_mappings_callback (ULONGEST vaddr, ULONGEST size, | |
1452 | ULONGEST offset, ULONGEST inode, | |
1453 | int read, int write, int exec, int modified, | |
1454 | const char *filename, void *data) | |
1455 | { | |
1456 | struct linux_make_mappings_data *map_data = data; | |
1457 | gdb_byte buf[sizeof (ULONGEST)]; | |
1458 | ||
1459 | if (*filename == '\0' || inode == 0) | |
1460 | return 0; | |
1461 | ||
1462 | ++map_data->file_count; | |
1463 | ||
1464 | pack_long (buf, map_data->long_type, vaddr); | |
1465 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1466 | pack_long (buf, map_data->long_type, vaddr + size); | |
1467 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1468 | pack_long (buf, map_data->long_type, offset); | |
1469 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1470 | ||
1471 | obstack_grow_str0 (map_data->filename_obstack, filename); | |
1472 | ||
1473 | return 0; | |
1474 | } | |
1475 | ||
1476 | /* Write the file mapping data to the core file, if possible. OBFD is | |
1477 | the output BFD. NOTE_DATA is the current note data, and NOTE_SIZE | |
1478 | is a pointer to the note size. Returns the new NOTE_DATA and | |
1479 | updates NOTE_SIZE. */ | |
1480 | ||
1481 | static char * | |
1482 | linux_make_mappings_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, | |
1483 | char *note_data, int *note_size) | |
1484 | { | |
1485 | struct cleanup *cleanup; | |
1486 | struct obstack data_obstack, filename_obstack; | |
1487 | struct linux_make_mappings_data mapping_data; | |
1488 | struct type *long_type | |
1489 | = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), 0, "long"); | |
1490 | gdb_byte buf[sizeof (ULONGEST)]; | |
1491 | ||
1492 | obstack_init (&data_obstack); | |
1493 | cleanup = make_cleanup_obstack_free (&data_obstack); | |
1494 | obstack_init (&filename_obstack); | |
1495 | make_cleanup_obstack_free (&filename_obstack); | |
1496 | ||
1497 | mapping_data.file_count = 0; | |
1498 | mapping_data.data_obstack = &data_obstack; | |
1499 | mapping_data.filename_obstack = &filename_obstack; | |
1500 | mapping_data.long_type = long_type; | |
1501 | ||
1502 | /* Reserve space for the count. */ | |
1503 | obstack_blank (&data_obstack, TYPE_LENGTH (long_type)); | |
1504 | /* We always write the page size as 1 since we have no good way to | |
1505 | determine the correct value. */ | |
1506 | pack_long (buf, long_type, 1); | |
1507 | obstack_grow (&data_obstack, buf, TYPE_LENGTH (long_type)); | |
1508 | ||
1509 | linux_find_memory_regions_full (gdbarch, linux_make_mappings_callback, | |
1510 | &mapping_data); | |
1511 | ||
1512 | if (mapping_data.file_count != 0) | |
1513 | { | |
1514 | /* Write the count to the obstack. */ | |
51a5cd90 PA |
1515 | pack_long ((gdb_byte *) obstack_base (&data_obstack), |
1516 | long_type, mapping_data.file_count); | |
451b7c33 TT |
1517 | |
1518 | /* Copy the filenames to the data obstack. */ | |
1519 | obstack_grow (&data_obstack, obstack_base (&filename_obstack), | |
1520 | obstack_object_size (&filename_obstack)); | |
1521 | ||
1522 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
1523 | "CORE", NT_FILE, | |
1524 | obstack_base (&data_obstack), | |
1525 | obstack_object_size (&data_obstack)); | |
1526 | } | |
1527 | ||
1528 | do_cleanups (cleanup); | |
1529 | return note_data; | |
1530 | } | |
1531 | ||
5aa82d05 AA |
1532 | /* Structure for passing information from |
1533 | linux_collect_thread_registers via an iterator to | |
1534 | linux_collect_regset_section_cb. */ | |
1535 | ||
1536 | struct linux_collect_regset_section_cb_data | |
1537 | { | |
1538 | struct gdbarch *gdbarch; | |
1539 | const struct regcache *regcache; | |
1540 | bfd *obfd; | |
1541 | char *note_data; | |
1542 | int *note_size; | |
1543 | unsigned long lwp; | |
1544 | enum gdb_signal stop_signal; | |
1545 | int abort_iteration; | |
1546 | }; | |
1547 | ||
1548 | /* Callback for iterate_over_regset_sections that records a single | |
1549 | regset in the corefile note section. */ | |
1550 | ||
1551 | static void | |
1552 | linux_collect_regset_section_cb (const char *sect_name, int size, | |
8f0435f7 | 1553 | const struct regset *regset, |
5aa82d05 AA |
1554 | const char *human_name, void *cb_data) |
1555 | { | |
5aa82d05 AA |
1556 | char *buf; |
1557 | struct linux_collect_regset_section_cb_data *data = cb_data; | |
1558 | ||
1559 | if (data->abort_iteration) | |
1560 | return; | |
1561 | ||
5aa82d05 AA |
1562 | gdb_assert (regset && regset->collect_regset); |
1563 | ||
1564 | buf = xmalloc (size); | |
1565 | regset->collect_regset (regset, data->regcache, -1, buf, size); | |
1566 | ||
1567 | /* PRSTATUS still needs to be treated specially. */ | |
1568 | if (strcmp (sect_name, ".reg") == 0) | |
1569 | data->note_data = (char *) elfcore_write_prstatus | |
1570 | (data->obfd, data->note_data, data->note_size, data->lwp, | |
1571 | gdb_signal_to_host (data->stop_signal), buf); | |
1572 | else | |
1573 | data->note_data = (char *) elfcore_write_register_note | |
1574 | (data->obfd, data->note_data, data->note_size, | |
1575 | sect_name, buf, size); | |
1576 | xfree (buf); | |
1577 | ||
1578 | if (data->note_data == NULL) | |
1579 | data->abort_iteration = 1; | |
1580 | } | |
1581 | ||
6432734d UW |
1582 | /* Records the thread's register state for the corefile note |
1583 | section. */ | |
1584 | ||
1585 | static char * | |
1586 | linux_collect_thread_registers (const struct regcache *regcache, | |
1587 | ptid_t ptid, bfd *obfd, | |
1588 | char *note_data, int *note_size, | |
2ea28649 | 1589 | enum gdb_signal stop_signal) |
6432734d UW |
1590 | { |
1591 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
5aa82d05 | 1592 | struct linux_collect_regset_section_cb_data data; |
6432734d | 1593 | |
5aa82d05 AA |
1594 | data.gdbarch = gdbarch; |
1595 | data.regcache = regcache; | |
1596 | data.obfd = obfd; | |
1597 | data.note_data = note_data; | |
1598 | data.note_size = note_size; | |
1599 | data.stop_signal = stop_signal; | |
1600 | data.abort_iteration = 0; | |
6432734d UW |
1601 | |
1602 | /* For remote targets the LWP may not be available, so use the TID. */ | |
5aa82d05 AA |
1603 | data.lwp = ptid_get_lwp (ptid); |
1604 | if (!data.lwp) | |
1605 | data.lwp = ptid_get_tid (ptid); | |
1606 | ||
1607 | gdbarch_iterate_over_regset_sections (gdbarch, | |
1608 | linux_collect_regset_section_cb, | |
1609 | &data, regcache); | |
1610 | return data.note_data; | |
6432734d UW |
1611 | } |
1612 | ||
9015683b TT |
1613 | /* Fetch the siginfo data for the current thread, if it exists. If |
1614 | there is no data, or we could not read it, return NULL. Otherwise, | |
1615 | return a newly malloc'd buffer holding the data and fill in *SIZE | |
1616 | with the size of the data. The caller is responsible for freeing | |
1617 | the data. */ | |
1618 | ||
1619 | static gdb_byte * | |
1620 | linux_get_siginfo_data (struct gdbarch *gdbarch, LONGEST *size) | |
1621 | { | |
1622 | struct type *siginfo_type; | |
1623 | gdb_byte *buf; | |
1624 | LONGEST bytes_read; | |
1625 | struct cleanup *cleanups; | |
1626 | ||
1627 | if (!gdbarch_get_siginfo_type_p (gdbarch)) | |
1628 | return NULL; | |
1629 | ||
1630 | siginfo_type = gdbarch_get_siginfo_type (gdbarch); | |
1631 | ||
1632 | buf = xmalloc (TYPE_LENGTH (siginfo_type)); | |
1633 | cleanups = make_cleanup (xfree, buf); | |
1634 | ||
1635 | bytes_read = target_read (¤t_target, TARGET_OBJECT_SIGNAL_INFO, NULL, | |
1636 | buf, 0, TYPE_LENGTH (siginfo_type)); | |
1637 | if (bytes_read == TYPE_LENGTH (siginfo_type)) | |
1638 | { | |
1639 | discard_cleanups (cleanups); | |
1640 | *size = bytes_read; | |
1641 | } | |
1642 | else | |
1643 | { | |
1644 | do_cleanups (cleanups); | |
1645 | buf = NULL; | |
1646 | } | |
1647 | ||
1648 | return buf; | |
1649 | } | |
1650 | ||
6432734d UW |
1651 | struct linux_corefile_thread_data |
1652 | { | |
1653 | struct gdbarch *gdbarch; | |
1654 | int pid; | |
1655 | bfd *obfd; | |
1656 | char *note_data; | |
1657 | int *note_size; | |
2ea28649 | 1658 | enum gdb_signal stop_signal; |
6432734d UW |
1659 | }; |
1660 | ||
1661 | /* Called by gdbthread.c once per thread. Records the thread's | |
1662 | register state for the corefile note section. */ | |
1663 | ||
1664 | static int | |
1665 | linux_corefile_thread_callback (struct thread_info *info, void *data) | |
1666 | { | |
1667 | struct linux_corefile_thread_data *args = data; | |
1668 | ||
22fd09ae JK |
1669 | /* It can be current thread |
1670 | which cannot be removed by update_thread_list. */ | |
1671 | if (info->state == THREAD_EXITED) | |
1672 | return 0; | |
1673 | ||
6432734d UW |
1674 | if (ptid_get_pid (info->ptid) == args->pid) |
1675 | { | |
1676 | struct cleanup *old_chain; | |
1677 | struct regcache *regcache; | |
9015683b | 1678 | gdb_byte *siginfo_data; |
e17aaa33 | 1679 | LONGEST siginfo_size = 0; |
9015683b | 1680 | |
6432734d UW |
1681 | regcache = get_thread_arch_regcache (info->ptid, args->gdbarch); |
1682 | ||
1683 | old_chain = save_inferior_ptid (); | |
1684 | inferior_ptid = info->ptid; | |
1685 | target_fetch_registers (regcache, -1); | |
9015683b | 1686 | siginfo_data = linux_get_siginfo_data (args->gdbarch, &siginfo_size); |
6432734d UW |
1687 | do_cleanups (old_chain); |
1688 | ||
9015683b TT |
1689 | old_chain = make_cleanup (xfree, siginfo_data); |
1690 | ||
f968fe80 AA |
1691 | args->note_data = linux_collect_thread_registers |
1692 | (regcache, info->ptid, args->obfd, args->note_data, | |
1693 | args->note_size, args->stop_signal); | |
9015683b | 1694 | |
bbe769cc MR |
1695 | /* Don't return anything if we got no register information above, |
1696 | such a core file is useless. */ | |
1697 | if (args->note_data != NULL) | |
1698 | if (siginfo_data != NULL) | |
9015683b TT |
1699 | args->note_data = elfcore_write_note (args->obfd, |
1700 | args->note_data, | |
1701 | args->note_size, | |
1702 | "CORE", NT_SIGINFO, | |
1703 | siginfo_data, siginfo_size); | |
9015683b TT |
1704 | |
1705 | do_cleanups (old_chain); | |
6432734d UW |
1706 | } |
1707 | ||
1708 | return !args->note_data; | |
1709 | } | |
1710 | ||
b3ac9c77 SDJ |
1711 | /* Fill the PRPSINFO structure with information about the process being |
1712 | debugged. Returns 1 in case of success, 0 for failures. Please note that | |
1713 | even if the structure cannot be entirely filled (e.g., GDB was unable to | |
1714 | gather information about the process UID/GID), this function will still | |
1715 | return 1 since some information was already recorded. It will only return | |
1716 | 0 iff nothing can be gathered. */ | |
1717 | ||
1718 | static int | |
1719 | linux_fill_prpsinfo (struct elf_internal_linux_prpsinfo *p) | |
1720 | { | |
1721 | /* The filename which we will use to obtain some info about the process. | |
1722 | We will basically use this to store the `/proc/PID/FILENAME' file. */ | |
1723 | char filename[100]; | |
1724 | /* The full name of the program which generated the corefile. */ | |
1725 | char *fname; | |
1726 | /* The basename of the executable. */ | |
1727 | const char *basename; | |
1728 | /* The arguments of the program. */ | |
1729 | char *psargs; | |
1730 | char *infargs; | |
1731 | /* The contents of `/proc/PID/stat' and `/proc/PID/status' files. */ | |
1732 | char *proc_stat, *proc_status; | |
1733 | /* Temporary buffer. */ | |
1734 | char *tmpstr; | |
1735 | /* The valid states of a process, according to the Linux kernel. */ | |
1736 | const char valid_states[] = "RSDTZW"; | |
1737 | /* The program state. */ | |
1738 | const char *prog_state; | |
1739 | /* The state of the process. */ | |
1740 | char pr_sname; | |
1741 | /* The PID of the program which generated the corefile. */ | |
1742 | pid_t pid; | |
1743 | /* Process flags. */ | |
1744 | unsigned int pr_flag; | |
1745 | /* Process nice value. */ | |
1746 | long pr_nice; | |
1747 | /* The number of fields read by `sscanf'. */ | |
1748 | int n_fields = 0; | |
1749 | /* Cleanups. */ | |
1750 | struct cleanup *c; | |
1751 | int i; | |
1752 | ||
1753 | gdb_assert (p != NULL); | |
1754 | ||
1755 | /* Obtaining PID and filename. */ | |
1756 | pid = ptid_get_pid (inferior_ptid); | |
1757 | xsnprintf (filename, sizeof (filename), "/proc/%d/cmdline", (int) pid); | |
1758 | fname = target_fileio_read_stralloc (filename); | |
1759 | ||
1760 | if (fname == NULL || *fname == '\0') | |
1761 | { | |
1762 | /* No program name was read, so we won't be able to retrieve more | |
1763 | information about the process. */ | |
1764 | xfree (fname); | |
1765 | return 0; | |
1766 | } | |
1767 | ||
1768 | c = make_cleanup (xfree, fname); | |
1769 | memset (p, 0, sizeof (*p)); | |
1770 | ||
1771 | /* Defining the PID. */ | |
1772 | p->pr_pid = pid; | |
1773 | ||
1774 | /* Copying the program name. Only the basename matters. */ | |
1775 | basename = lbasename (fname); | |
1776 | strncpy (p->pr_fname, basename, sizeof (p->pr_fname)); | |
1777 | p->pr_fname[sizeof (p->pr_fname) - 1] = '\0'; | |
1778 | ||
1779 | infargs = get_inferior_args (); | |
1780 | ||
1781 | psargs = xstrdup (fname); | |
1782 | if (infargs != NULL) | |
1783 | psargs = reconcat (psargs, psargs, " ", infargs, NULL); | |
1784 | ||
1785 | make_cleanup (xfree, psargs); | |
1786 | ||
1787 | strncpy (p->pr_psargs, psargs, sizeof (p->pr_psargs)); | |
1788 | p->pr_psargs[sizeof (p->pr_psargs) - 1] = '\0'; | |
1789 | ||
1790 | xsnprintf (filename, sizeof (filename), "/proc/%d/stat", (int) pid); | |
1791 | proc_stat = target_fileio_read_stralloc (filename); | |
1792 | make_cleanup (xfree, proc_stat); | |
1793 | ||
1794 | if (proc_stat == NULL || *proc_stat == '\0') | |
1795 | { | |
1796 | /* Despite being unable to read more information about the | |
1797 | process, we return 1 here because at least we have its | |
1798 | command line, PID and arguments. */ | |
1799 | do_cleanups (c); | |
1800 | return 1; | |
1801 | } | |
1802 | ||
1803 | /* Ok, we have the stats. It's time to do a little parsing of the | |
1804 | contents of the buffer, so that we end up reading what we want. | |
1805 | ||
1806 | The following parsing mechanism is strongly based on the | |
1807 | information generated by the `fs/proc/array.c' file, present in | |
1808 | the Linux kernel tree. More details about how the information is | |
1809 | displayed can be obtained by seeing the manpage of proc(5), | |
1810 | specifically under the entry of `/proc/[pid]/stat'. */ | |
1811 | ||
1812 | /* Getting rid of the PID, since we already have it. */ | |
1813 | while (isdigit (*proc_stat)) | |
1814 | ++proc_stat; | |
1815 | ||
1816 | proc_stat = skip_spaces (proc_stat); | |
1817 | ||
184cd072 JK |
1818 | /* ps command also relies on no trailing fields ever contain ')'. */ |
1819 | proc_stat = strrchr (proc_stat, ')'); | |
1820 | if (proc_stat == NULL) | |
1821 | { | |
1822 | do_cleanups (c); | |
1823 | return 1; | |
1824 | } | |
1825 | proc_stat++; | |
b3ac9c77 SDJ |
1826 | |
1827 | proc_stat = skip_spaces (proc_stat); | |
1828 | ||
1829 | n_fields = sscanf (proc_stat, | |
1830 | "%c" /* Process state. */ | |
1831 | "%d%d%d" /* Parent PID, group ID, session ID. */ | |
1832 | "%*d%*d" /* tty_nr, tpgid (not used). */ | |
1833 | "%u" /* Flags. */ | |
1834 | "%*s%*s%*s%*s" /* minflt, cminflt, majflt, | |
1835 | cmajflt (not used). */ | |
1836 | "%*s%*s%*s%*s" /* utime, stime, cutime, | |
1837 | cstime (not used). */ | |
1838 | "%*s" /* Priority (not used). */ | |
1839 | "%ld", /* Nice. */ | |
1840 | &pr_sname, | |
1841 | &p->pr_ppid, &p->pr_pgrp, &p->pr_sid, | |
1842 | &pr_flag, | |
1843 | &pr_nice); | |
1844 | ||
1845 | if (n_fields != 6) | |
1846 | { | |
1847 | /* Again, we couldn't read the complementary information about | |
1848 | the process state. However, we already have minimal | |
1849 | information, so we just return 1 here. */ | |
1850 | do_cleanups (c); | |
1851 | return 1; | |
1852 | } | |
1853 | ||
1854 | /* Filling the structure fields. */ | |
1855 | prog_state = strchr (valid_states, pr_sname); | |
1856 | if (prog_state != NULL) | |
1857 | p->pr_state = prog_state - valid_states; | |
1858 | else | |
1859 | { | |
1860 | /* Zero means "Running". */ | |
1861 | p->pr_state = 0; | |
1862 | } | |
1863 | ||
1864 | p->pr_sname = p->pr_state > 5 ? '.' : pr_sname; | |
1865 | p->pr_zomb = p->pr_sname == 'Z'; | |
1866 | p->pr_nice = pr_nice; | |
1867 | p->pr_flag = pr_flag; | |
1868 | ||
1869 | /* Finally, obtaining the UID and GID. For that, we read and parse the | |
1870 | contents of the `/proc/PID/status' file. */ | |
1871 | xsnprintf (filename, sizeof (filename), "/proc/%d/status", (int) pid); | |
1872 | proc_status = target_fileio_read_stralloc (filename); | |
1873 | make_cleanup (xfree, proc_status); | |
1874 | ||
1875 | if (proc_status == NULL || *proc_status == '\0') | |
1876 | { | |
1877 | /* Returning 1 since we already have a bunch of information. */ | |
1878 | do_cleanups (c); | |
1879 | return 1; | |
1880 | } | |
1881 | ||
1882 | /* Extracting the UID. */ | |
1883 | tmpstr = strstr (proc_status, "Uid:"); | |
1884 | if (tmpstr != NULL) | |
1885 | { | |
1886 | /* Advancing the pointer to the beginning of the UID. */ | |
1887 | tmpstr += sizeof ("Uid:"); | |
1888 | while (*tmpstr != '\0' && !isdigit (*tmpstr)) | |
1889 | ++tmpstr; | |
1890 | ||
1891 | if (isdigit (*tmpstr)) | |
1892 | p->pr_uid = strtol (tmpstr, &tmpstr, 10); | |
1893 | } | |
1894 | ||
1895 | /* Extracting the GID. */ | |
1896 | tmpstr = strstr (proc_status, "Gid:"); | |
1897 | if (tmpstr != NULL) | |
1898 | { | |
1899 | /* Advancing the pointer to the beginning of the GID. */ | |
1900 | tmpstr += sizeof ("Gid:"); | |
1901 | while (*tmpstr != '\0' && !isdigit (*tmpstr)) | |
1902 | ++tmpstr; | |
1903 | ||
1904 | if (isdigit (*tmpstr)) | |
1905 | p->pr_gid = strtol (tmpstr, &tmpstr, 10); | |
1906 | } | |
1907 | ||
1908 | do_cleanups (c); | |
1909 | ||
1910 | return 1; | |
1911 | } | |
1912 | ||
f968fe80 AA |
1913 | /* Build the note section for a corefile, and return it in a malloc |
1914 | buffer. */ | |
6432734d | 1915 | |
f968fe80 AA |
1916 | static char * |
1917 | linux_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size) | |
6432734d UW |
1918 | { |
1919 | struct linux_corefile_thread_data thread_args; | |
b3ac9c77 | 1920 | struct elf_internal_linux_prpsinfo prpsinfo; |
6432734d UW |
1921 | char *note_data = NULL; |
1922 | gdb_byte *auxv; | |
1923 | int auxv_len; | |
1924 | ||
f968fe80 AA |
1925 | if (! gdbarch_iterate_over_regset_sections_p (gdbarch)) |
1926 | return NULL; | |
1927 | ||
b3ac9c77 | 1928 | if (linux_fill_prpsinfo (&prpsinfo)) |
6432734d | 1929 | { |
b3ac9c77 SDJ |
1930 | if (gdbarch_elfcore_write_linux_prpsinfo_p (gdbarch)) |
1931 | { | |
1932 | note_data = gdbarch_elfcore_write_linux_prpsinfo (gdbarch, obfd, | |
1933 | note_data, note_size, | |
1934 | &prpsinfo); | |
1935 | } | |
1936 | else | |
1937 | { | |
1938 | if (gdbarch_ptr_bit (gdbarch) == 64) | |
1939 | note_data = elfcore_write_linux_prpsinfo64 (obfd, | |
1940 | note_data, note_size, | |
1941 | &prpsinfo); | |
1942 | else | |
1943 | note_data = elfcore_write_linux_prpsinfo32 (obfd, | |
1944 | note_data, note_size, | |
1945 | &prpsinfo); | |
1946 | } | |
6432734d UW |
1947 | } |
1948 | ||
1949 | /* Thread register information. */ | |
492d29ea | 1950 | TRY |
22fd09ae JK |
1951 | { |
1952 | update_thread_list (); | |
1953 | } | |
492d29ea PA |
1954 | CATCH (e, RETURN_MASK_ERROR) |
1955 | { | |
1956 | exception_print (gdb_stderr, e); | |
1957 | } | |
1958 | END_CATCH | |
1959 | ||
6432734d UW |
1960 | thread_args.gdbarch = gdbarch; |
1961 | thread_args.pid = ptid_get_pid (inferior_ptid); | |
1962 | thread_args.obfd = obfd; | |
1963 | thread_args.note_data = note_data; | |
1964 | thread_args.note_size = note_size; | |
6432734d | 1965 | thread_args.stop_signal = find_stop_signal (); |
6432734d UW |
1966 | iterate_over_threads (linux_corefile_thread_callback, &thread_args); |
1967 | note_data = thread_args.note_data; | |
1968 | if (!note_data) | |
1969 | return NULL; | |
1970 | ||
1971 | /* Auxillary vector. */ | |
1972 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, | |
1973 | NULL, &auxv); | |
1974 | if (auxv_len > 0) | |
1975 | { | |
1976 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
1977 | "CORE", NT_AUXV, auxv, auxv_len); | |
1978 | xfree (auxv); | |
1979 | ||
1980 | if (!note_data) | |
1981 | return NULL; | |
1982 | } | |
1983 | ||
1984 | /* SPU information. */ | |
1985 | note_data = linux_spu_make_corefile_notes (obfd, note_data, note_size); | |
1986 | if (!note_data) | |
1987 | return NULL; | |
1988 | ||
451b7c33 TT |
1989 | /* File mappings. */ |
1990 | note_data = linux_make_mappings_corefile_notes (gdbarch, obfd, | |
1991 | note_data, note_size); | |
1992 | ||
6432734d UW |
1993 | return note_data; |
1994 | } | |
1995 | ||
eb14d406 SDJ |
1996 | /* Implementation of `gdbarch_gdb_signal_from_target', as defined in |
1997 | gdbarch.h. This function is not static because it is exported to | |
1998 | other -tdep files. */ | |
1999 | ||
2000 | enum gdb_signal | |
2001 | linux_gdb_signal_from_target (struct gdbarch *gdbarch, int signal) | |
2002 | { | |
2003 | switch (signal) | |
2004 | { | |
2005 | case 0: | |
2006 | return GDB_SIGNAL_0; | |
2007 | ||
2008 | case LINUX_SIGHUP: | |
2009 | return GDB_SIGNAL_HUP; | |
2010 | ||
2011 | case LINUX_SIGINT: | |
2012 | return GDB_SIGNAL_INT; | |
2013 | ||
2014 | case LINUX_SIGQUIT: | |
2015 | return GDB_SIGNAL_QUIT; | |
2016 | ||
2017 | case LINUX_SIGILL: | |
2018 | return GDB_SIGNAL_ILL; | |
2019 | ||
2020 | case LINUX_SIGTRAP: | |
2021 | return GDB_SIGNAL_TRAP; | |
2022 | ||
2023 | case LINUX_SIGABRT: | |
2024 | return GDB_SIGNAL_ABRT; | |
2025 | ||
2026 | case LINUX_SIGBUS: | |
2027 | return GDB_SIGNAL_BUS; | |
2028 | ||
2029 | case LINUX_SIGFPE: | |
2030 | return GDB_SIGNAL_FPE; | |
2031 | ||
2032 | case LINUX_SIGKILL: | |
2033 | return GDB_SIGNAL_KILL; | |
2034 | ||
2035 | case LINUX_SIGUSR1: | |
2036 | return GDB_SIGNAL_USR1; | |
2037 | ||
2038 | case LINUX_SIGSEGV: | |
2039 | return GDB_SIGNAL_SEGV; | |
2040 | ||
2041 | case LINUX_SIGUSR2: | |
2042 | return GDB_SIGNAL_USR2; | |
2043 | ||
2044 | case LINUX_SIGPIPE: | |
2045 | return GDB_SIGNAL_PIPE; | |
2046 | ||
2047 | case LINUX_SIGALRM: | |
2048 | return GDB_SIGNAL_ALRM; | |
2049 | ||
2050 | case LINUX_SIGTERM: | |
2051 | return GDB_SIGNAL_TERM; | |
2052 | ||
2053 | case LINUX_SIGCHLD: | |
2054 | return GDB_SIGNAL_CHLD; | |
2055 | ||
2056 | case LINUX_SIGCONT: | |
2057 | return GDB_SIGNAL_CONT; | |
2058 | ||
2059 | case LINUX_SIGSTOP: | |
2060 | return GDB_SIGNAL_STOP; | |
2061 | ||
2062 | case LINUX_SIGTSTP: | |
2063 | return GDB_SIGNAL_TSTP; | |
2064 | ||
2065 | case LINUX_SIGTTIN: | |
2066 | return GDB_SIGNAL_TTIN; | |
2067 | ||
2068 | case LINUX_SIGTTOU: | |
2069 | return GDB_SIGNAL_TTOU; | |
2070 | ||
2071 | case LINUX_SIGURG: | |
2072 | return GDB_SIGNAL_URG; | |
2073 | ||
2074 | case LINUX_SIGXCPU: | |
2075 | return GDB_SIGNAL_XCPU; | |
2076 | ||
2077 | case LINUX_SIGXFSZ: | |
2078 | return GDB_SIGNAL_XFSZ; | |
2079 | ||
2080 | case LINUX_SIGVTALRM: | |
2081 | return GDB_SIGNAL_VTALRM; | |
2082 | ||
2083 | case LINUX_SIGPROF: | |
2084 | return GDB_SIGNAL_PROF; | |
2085 | ||
2086 | case LINUX_SIGWINCH: | |
2087 | return GDB_SIGNAL_WINCH; | |
2088 | ||
2089 | /* No way to differentiate between SIGIO and SIGPOLL. | |
2090 | Therefore, we just handle the first one. */ | |
2091 | case LINUX_SIGIO: | |
2092 | return GDB_SIGNAL_IO; | |
2093 | ||
2094 | case LINUX_SIGPWR: | |
2095 | return GDB_SIGNAL_PWR; | |
2096 | ||
2097 | case LINUX_SIGSYS: | |
2098 | return GDB_SIGNAL_SYS; | |
2099 | ||
2100 | /* SIGRTMIN and SIGRTMAX are not continuous in <gdb/signals.def>, | |
2101 | therefore we have to handle them here. */ | |
2102 | case LINUX_SIGRTMIN: | |
2103 | return GDB_SIGNAL_REALTIME_32; | |
2104 | ||
2105 | case LINUX_SIGRTMAX: | |
2106 | return GDB_SIGNAL_REALTIME_64; | |
2107 | } | |
2108 | ||
2109 | if (signal >= LINUX_SIGRTMIN + 1 && signal <= LINUX_SIGRTMAX - 1) | |
2110 | { | |
2111 | int offset = signal - LINUX_SIGRTMIN + 1; | |
2112 | ||
2113 | return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_33 + offset); | |
2114 | } | |
2115 | ||
2116 | return GDB_SIGNAL_UNKNOWN; | |
2117 | } | |
2118 | ||
2119 | /* Implementation of `gdbarch_gdb_signal_to_target', as defined in | |
2120 | gdbarch.h. This function is not static because it is exported to | |
2121 | other -tdep files. */ | |
2122 | ||
2123 | int | |
2124 | linux_gdb_signal_to_target (struct gdbarch *gdbarch, | |
2125 | enum gdb_signal signal) | |
2126 | { | |
2127 | switch (signal) | |
2128 | { | |
2129 | case GDB_SIGNAL_0: | |
2130 | return 0; | |
2131 | ||
2132 | case GDB_SIGNAL_HUP: | |
2133 | return LINUX_SIGHUP; | |
2134 | ||
2135 | case GDB_SIGNAL_INT: | |
2136 | return LINUX_SIGINT; | |
2137 | ||
2138 | case GDB_SIGNAL_QUIT: | |
2139 | return LINUX_SIGQUIT; | |
2140 | ||
2141 | case GDB_SIGNAL_ILL: | |
2142 | return LINUX_SIGILL; | |
2143 | ||
2144 | case GDB_SIGNAL_TRAP: | |
2145 | return LINUX_SIGTRAP; | |
2146 | ||
2147 | case GDB_SIGNAL_ABRT: | |
2148 | return LINUX_SIGABRT; | |
2149 | ||
2150 | case GDB_SIGNAL_FPE: | |
2151 | return LINUX_SIGFPE; | |
2152 | ||
2153 | case GDB_SIGNAL_KILL: | |
2154 | return LINUX_SIGKILL; | |
2155 | ||
2156 | case GDB_SIGNAL_BUS: | |
2157 | return LINUX_SIGBUS; | |
2158 | ||
2159 | case GDB_SIGNAL_SEGV: | |
2160 | return LINUX_SIGSEGV; | |
2161 | ||
2162 | case GDB_SIGNAL_SYS: | |
2163 | return LINUX_SIGSYS; | |
2164 | ||
2165 | case GDB_SIGNAL_PIPE: | |
2166 | return LINUX_SIGPIPE; | |
2167 | ||
2168 | case GDB_SIGNAL_ALRM: | |
2169 | return LINUX_SIGALRM; | |
2170 | ||
2171 | case GDB_SIGNAL_TERM: | |
2172 | return LINUX_SIGTERM; | |
2173 | ||
2174 | case GDB_SIGNAL_URG: | |
2175 | return LINUX_SIGURG; | |
2176 | ||
2177 | case GDB_SIGNAL_STOP: | |
2178 | return LINUX_SIGSTOP; | |
2179 | ||
2180 | case GDB_SIGNAL_TSTP: | |
2181 | return LINUX_SIGTSTP; | |
2182 | ||
2183 | case GDB_SIGNAL_CONT: | |
2184 | return LINUX_SIGCONT; | |
2185 | ||
2186 | case GDB_SIGNAL_CHLD: | |
2187 | return LINUX_SIGCHLD; | |
2188 | ||
2189 | case GDB_SIGNAL_TTIN: | |
2190 | return LINUX_SIGTTIN; | |
2191 | ||
2192 | case GDB_SIGNAL_TTOU: | |
2193 | return LINUX_SIGTTOU; | |
2194 | ||
2195 | case GDB_SIGNAL_IO: | |
2196 | return LINUX_SIGIO; | |
2197 | ||
2198 | case GDB_SIGNAL_XCPU: | |
2199 | return LINUX_SIGXCPU; | |
2200 | ||
2201 | case GDB_SIGNAL_XFSZ: | |
2202 | return LINUX_SIGXFSZ; | |
2203 | ||
2204 | case GDB_SIGNAL_VTALRM: | |
2205 | return LINUX_SIGVTALRM; | |
2206 | ||
2207 | case GDB_SIGNAL_PROF: | |
2208 | return LINUX_SIGPROF; | |
2209 | ||
2210 | case GDB_SIGNAL_WINCH: | |
2211 | return LINUX_SIGWINCH; | |
2212 | ||
2213 | case GDB_SIGNAL_USR1: | |
2214 | return LINUX_SIGUSR1; | |
2215 | ||
2216 | case GDB_SIGNAL_USR2: | |
2217 | return LINUX_SIGUSR2; | |
2218 | ||
2219 | case GDB_SIGNAL_PWR: | |
2220 | return LINUX_SIGPWR; | |
2221 | ||
2222 | case GDB_SIGNAL_POLL: | |
2223 | return LINUX_SIGPOLL; | |
2224 | ||
2225 | /* GDB_SIGNAL_REALTIME_32 is not continuous in <gdb/signals.def>, | |
2226 | therefore we have to handle it here. */ | |
2227 | case GDB_SIGNAL_REALTIME_32: | |
2228 | return LINUX_SIGRTMIN; | |
2229 | ||
2230 | /* Same comment applies to _64. */ | |
2231 | case GDB_SIGNAL_REALTIME_64: | |
2232 | return LINUX_SIGRTMAX; | |
2233 | } | |
2234 | ||
2235 | /* GDB_SIGNAL_REALTIME_33 to _64 are continuous. */ | |
2236 | if (signal >= GDB_SIGNAL_REALTIME_33 | |
2237 | && signal <= GDB_SIGNAL_REALTIME_63) | |
2238 | { | |
2239 | int offset = signal - GDB_SIGNAL_REALTIME_33; | |
2240 | ||
2241 | return LINUX_SIGRTMIN + 1 + offset; | |
2242 | } | |
2243 | ||
2244 | return -1; | |
2245 | } | |
2246 | ||
3437254d PA |
2247 | /* Rummage through mappings to find a mapping's size. */ |
2248 | ||
2249 | static int | |
2250 | find_mapping_size (CORE_ADDR vaddr, unsigned long size, | |
2251 | int read, int write, int exec, int modified, | |
2252 | void *data) | |
2253 | { | |
2254 | struct mem_range *range = data; | |
2255 | ||
2256 | if (vaddr == range->start) | |
2257 | { | |
2258 | range->length = size; | |
2259 | return 1; | |
2260 | } | |
2261 | return 0; | |
2262 | } | |
2263 | ||
cdfa0b0a PA |
2264 | /* Helper for linux_vsyscall_range that does the real work of finding |
2265 | the vsyscall's address range. */ | |
3437254d PA |
2266 | |
2267 | static int | |
cdfa0b0a | 2268 | linux_vsyscall_range_raw (struct gdbarch *gdbarch, struct mem_range *range) |
3437254d PA |
2269 | { |
2270 | if (target_auxv_search (¤t_target, AT_SYSINFO_EHDR, &range->start) <= 0) | |
2271 | return 0; | |
2272 | ||
2273 | /* This is installed by linux_init_abi below, so should always be | |
2274 | available. */ | |
2275 | gdb_assert (gdbarch_find_memory_regions_p (target_gdbarch ())); | |
2276 | ||
2277 | range->length = 0; | |
2278 | gdbarch_find_memory_regions (gdbarch, find_mapping_size, range); | |
2279 | return 1; | |
2280 | } | |
2281 | ||
cdfa0b0a PA |
2282 | /* Implementation of the "vsyscall_range" gdbarch hook. Handles |
2283 | caching, and defers the real work to linux_vsyscall_range_raw. */ | |
2284 | ||
2285 | static int | |
2286 | linux_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range) | |
2287 | { | |
2288 | struct linux_info *info = get_linux_inferior_data (); | |
2289 | ||
2290 | if (info->vsyscall_range_p == 0) | |
2291 | { | |
2292 | if (linux_vsyscall_range_raw (gdbarch, &info->vsyscall_range)) | |
2293 | info->vsyscall_range_p = 1; | |
2294 | else | |
2295 | info->vsyscall_range_p = -1; | |
2296 | } | |
2297 | ||
2298 | if (info->vsyscall_range_p < 0) | |
2299 | return 0; | |
2300 | ||
2301 | *range = info->vsyscall_range; | |
2302 | return 1; | |
2303 | } | |
2304 | ||
3bc3cebe JK |
2305 | /* Symbols for linux_infcall_mmap's ARG_FLAGS; their Linux MAP_* system |
2306 | definitions would be dependent on compilation host. */ | |
2307 | #define GDB_MMAP_MAP_PRIVATE 0x02 /* Changes are private. */ | |
2308 | #define GDB_MMAP_MAP_ANONYMOUS 0x20 /* Don't use a file. */ | |
2309 | ||
2310 | /* See gdbarch.sh 'infcall_mmap'. */ | |
2311 | ||
2312 | static CORE_ADDR | |
2313 | linux_infcall_mmap (CORE_ADDR size, unsigned prot) | |
2314 | { | |
2315 | struct objfile *objf; | |
2316 | /* Do there still exist any Linux systems without "mmap64"? | |
2317 | "mmap" uses 64-bit off_t on x86_64 and 32-bit off_t on i386 and x32. */ | |
2318 | struct value *mmap_val = find_function_in_inferior ("mmap64", &objf); | |
2319 | struct value *addr_val; | |
2320 | struct gdbarch *gdbarch = get_objfile_arch (objf); | |
2321 | CORE_ADDR retval; | |
2322 | enum | |
2323 | { | |
2a546367 | 2324 | ARG_ADDR, ARG_LENGTH, ARG_PROT, ARG_FLAGS, ARG_FD, ARG_OFFSET, ARG_LAST |
3bc3cebe | 2325 | }; |
2a546367 | 2326 | struct value *arg[ARG_LAST]; |
3bc3cebe JK |
2327 | |
2328 | arg[ARG_ADDR] = value_from_pointer (builtin_type (gdbarch)->builtin_data_ptr, | |
2329 | 0); | |
2330 | /* Assuming sizeof (unsigned long) == sizeof (size_t). */ | |
2331 | arg[ARG_LENGTH] = value_from_ulongest | |
2332 | (builtin_type (gdbarch)->builtin_unsigned_long, size); | |
2333 | gdb_assert ((prot & ~(GDB_MMAP_PROT_READ | GDB_MMAP_PROT_WRITE | |
2334 | | GDB_MMAP_PROT_EXEC)) | |
2335 | == 0); | |
2336 | arg[ARG_PROT] = value_from_longest (builtin_type (gdbarch)->builtin_int, prot); | |
2337 | arg[ARG_FLAGS] = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
2338 | GDB_MMAP_MAP_PRIVATE | |
2339 | | GDB_MMAP_MAP_ANONYMOUS); | |
2340 | arg[ARG_FD] = value_from_longest (builtin_type (gdbarch)->builtin_int, -1); | |
2341 | arg[ARG_OFFSET] = value_from_longest (builtin_type (gdbarch)->builtin_int64, | |
2342 | 0); | |
2a546367 | 2343 | addr_val = call_function_by_hand (mmap_val, ARG_LAST, arg); |
3bc3cebe JK |
2344 | retval = value_as_address (addr_val); |
2345 | if (retval == (CORE_ADDR) -1) | |
2346 | error (_("Failed inferior mmap call for %s bytes, errno is changed."), | |
2347 | pulongest (size)); | |
2348 | return retval; | |
2349 | } | |
2350 | ||
906d60cf PA |
2351 | /* See linux-tdep.h. */ |
2352 | ||
2353 | CORE_ADDR | |
2354 | linux_displaced_step_location (struct gdbarch *gdbarch) | |
2355 | { | |
2356 | CORE_ADDR addr; | |
2357 | int bp_len; | |
2358 | ||
2359 | /* Determine entry point from target auxiliary vector. This avoids | |
2360 | the need for symbols. Also, when debugging a stand-alone SPU | |
2361 | executable, entry_point_address () will point to an SPU | |
2362 | local-store address and is thus not usable as displaced stepping | |
2363 | location. The auxiliary vector gets us the PowerPC-side entry | |
2364 | point address instead. */ | |
2365 | if (target_auxv_search (¤t_target, AT_ENTRY, &addr) <= 0) | |
2366 | error (_("Cannot find AT_ENTRY auxiliary vector entry.")); | |
2367 | ||
2368 | /* Make certain that the address points at real code, and not a | |
2369 | function descriptor. */ | |
2370 | addr = gdbarch_convert_from_func_ptr_addr (gdbarch, addr, | |
2371 | ¤t_target); | |
2372 | ||
2373 | /* Inferior calls also use the entry point as a breakpoint location. | |
2374 | We don't want displaced stepping to interfere with those | |
2375 | breakpoints, so leave space. */ | |
2376 | gdbarch_breakpoint_from_pc (gdbarch, &addr, &bp_len); | |
2377 | addr += bp_len * 2; | |
2378 | ||
2379 | return addr; | |
2380 | } | |
2381 | ||
df8411da SDJ |
2382 | /* Display whether the gcore command is using the |
2383 | /proc/PID/coredump_filter file. */ | |
2384 | ||
2385 | static void | |
2386 | show_use_coredump_filter (struct ui_file *file, int from_tty, | |
2387 | struct cmd_list_element *c, const char *value) | |
2388 | { | |
2389 | fprintf_filtered (file, _("Use of /proc/PID/coredump_filter file to generate" | |
2390 | " corefiles is %s.\n"), value); | |
2391 | } | |
2392 | ||
a5ee0f0c PA |
2393 | /* To be called from the various GDB_OSABI_LINUX handlers for the |
2394 | various GNU/Linux architectures and machine types. */ | |
2395 | ||
2396 | void | |
2397 | linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
2398 | { | |
2399 | set_gdbarch_core_pid_to_str (gdbarch, linux_core_pid_to_str); | |
3030c96e | 2400 | set_gdbarch_info_proc (gdbarch, linux_info_proc); |
451b7c33 | 2401 | set_gdbarch_core_info_proc (gdbarch, linux_core_info_proc); |
35c2fab7 | 2402 | set_gdbarch_find_memory_regions (gdbarch, linux_find_memory_regions); |
f968fe80 | 2403 | set_gdbarch_make_corefile_notes (gdbarch, linux_make_corefile_notes); |
33fbcbee PA |
2404 | set_gdbarch_has_shared_address_space (gdbarch, |
2405 | linux_has_shared_address_space); | |
eb14d406 SDJ |
2406 | set_gdbarch_gdb_signal_from_target (gdbarch, |
2407 | linux_gdb_signal_from_target); | |
2408 | set_gdbarch_gdb_signal_to_target (gdbarch, | |
2409 | linux_gdb_signal_to_target); | |
3437254d | 2410 | set_gdbarch_vsyscall_range (gdbarch, linux_vsyscall_range); |
3bc3cebe | 2411 | set_gdbarch_infcall_mmap (gdbarch, linux_infcall_mmap); |
a5ee0f0c | 2412 | } |
06253dd3 | 2413 | |
70221824 PA |
2414 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
2415 | extern initialize_file_ftype _initialize_linux_tdep; | |
2416 | ||
06253dd3 JK |
2417 | void |
2418 | _initialize_linux_tdep (void) | |
2419 | { | |
2420 | linux_gdbarch_data_handle = | |
2421 | gdbarch_data_register_post_init (init_linux_gdbarch_data); | |
cdfa0b0a PA |
2422 | |
2423 | /* Set a cache per-inferior. */ | |
2424 | linux_inferior_data | |
2425 | = register_inferior_data_with_cleanup (NULL, linux_inferior_data_cleanup); | |
2426 | /* Observers used to invalidate the cache when needed. */ | |
2427 | observer_attach_inferior_exit (invalidate_linux_cache_inf); | |
2428 | observer_attach_inferior_appeared (invalidate_linux_cache_inf); | |
df8411da SDJ |
2429 | |
2430 | add_setshow_boolean_cmd ("use-coredump-filter", class_files, | |
2431 | &use_coredump_filter, _("\ | |
2432 | Set whether gcore should consider /proc/PID/coredump_filter."), | |
2433 | _("\ | |
2434 | Show whether gcore should consider /proc/PID/coredump_filter."), | |
2435 | _("\ | |
2436 | Use this command to set whether gcore should consider the contents\n\ | |
2437 | of /proc/PID/coredump_filter when generating the corefile. For more information\n\ | |
2438 | about this file, refer to the manpage of core(5)."), | |
2439 | NULL, show_use_coredump_filter, | |
2440 | &setlist, &showlist); | |
06253dd3 | 2441 | } |