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4aa995e1 PA |
1 | /* Target-dependent code for GNU/Linux, architecture independent. |
2 | ||
618f726f | 3 | Copyright (C) 2009-2016 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 | 38 | #include "gdbcmd.h" |
db1ff28b | 39 | #include "gdb_regex.h" |
8d297bbf | 40 | #include "common/enum-flags.h" |
3030c96e UW |
41 | |
42 | #include <ctype.h> | |
4aa995e1 | 43 | |
db1ff28b JK |
44 | /* This enum represents the values that the user can choose when |
45 | informing the Linux kernel about which memory mappings will be | |
46 | dumped in a corefile. They are described in the file | |
47 | Documentation/filesystems/proc.txt, inside the Linux kernel | |
48 | tree. */ | |
49 | ||
8d297bbf | 50 | enum filter_flag |
db1ff28b JK |
51 | { |
52 | COREFILTER_ANON_PRIVATE = 1 << 0, | |
53 | COREFILTER_ANON_SHARED = 1 << 1, | |
54 | COREFILTER_MAPPED_PRIVATE = 1 << 2, | |
55 | COREFILTER_MAPPED_SHARED = 1 << 3, | |
56 | COREFILTER_ELF_HEADERS = 1 << 4, | |
57 | COREFILTER_HUGETLB_PRIVATE = 1 << 5, | |
58 | COREFILTER_HUGETLB_SHARED = 1 << 6, | |
59 | }; | |
8d297bbf | 60 | DEF_ENUM_FLAGS_TYPE (enum filter_flag, filter_flags); |
db1ff28b JK |
61 | |
62 | /* This struct is used to map flags found in the "VmFlags:" field (in | |
63 | the /proc/<PID>/smaps file). */ | |
64 | ||
65 | struct smaps_vmflags | |
66 | { | |
67 | /* Zero if this structure has not been initialized yet. It | |
68 | probably means that the Linux kernel being used does not emit | |
69 | the "VmFlags:" field on "/proc/PID/smaps". */ | |
70 | ||
71 | unsigned int initialized_p : 1; | |
72 | ||
73 | /* Memory mapped I/O area (VM_IO, "io"). */ | |
74 | ||
75 | unsigned int io_page : 1; | |
76 | ||
77 | /* Area uses huge TLB pages (VM_HUGETLB, "ht"). */ | |
78 | ||
79 | unsigned int uses_huge_tlb : 1; | |
80 | ||
81 | /* Do not include this memory region on the coredump (VM_DONTDUMP, "dd"). */ | |
82 | ||
83 | unsigned int exclude_coredump : 1; | |
84 | ||
85 | /* Is this a MAP_SHARED mapping (VM_SHARED, "sh"). */ | |
86 | ||
87 | unsigned int shared_mapping : 1; | |
88 | }; | |
89 | ||
df8411da SDJ |
90 | /* Whether to take the /proc/PID/coredump_filter into account when |
91 | generating a corefile. */ | |
92 | ||
93 | static int use_coredump_filter = 1; | |
94 | ||
eb14d406 SDJ |
95 | /* This enum represents the signals' numbers on a generic architecture |
96 | running the Linux kernel. The definition of "generic" comes from | |
97 | the file <include/uapi/asm-generic/signal.h>, from the Linux kernel | |
98 | tree, which is the "de facto" implementation of signal numbers to | |
99 | be used by new architecture ports. | |
100 | ||
101 | For those architectures which have differences between the generic | |
102 | standard (e.g., Alpha), we define the different signals (and *only* | |
103 | those) in the specific target-dependent file (e.g., | |
104 | alpha-linux-tdep.c, for Alpha). Please refer to the architecture's | |
105 | tdep file for more information. | |
106 | ||
107 | ARM deserves a special mention here. On the file | |
108 | <arch/arm/include/uapi/asm/signal.h>, it defines only one different | |
109 | (and ARM-only) signal, which is SIGSWI, with the same number as | |
110 | SIGRTMIN. This signal is used only for a very specific target, | |
111 | called ArthurOS (from RISCOS). Therefore, we do not handle it on | |
112 | the ARM-tdep file, and we can safely use the generic signal handler | |
113 | here for ARM targets. | |
114 | ||
115 | As stated above, this enum is derived from | |
116 | <include/uapi/asm-generic/signal.h>, from the Linux kernel | |
117 | tree. */ | |
118 | ||
119 | enum | |
120 | { | |
121 | LINUX_SIGHUP = 1, | |
122 | LINUX_SIGINT = 2, | |
123 | LINUX_SIGQUIT = 3, | |
124 | LINUX_SIGILL = 4, | |
125 | LINUX_SIGTRAP = 5, | |
126 | LINUX_SIGABRT = 6, | |
127 | LINUX_SIGIOT = 6, | |
128 | LINUX_SIGBUS = 7, | |
129 | LINUX_SIGFPE = 8, | |
130 | LINUX_SIGKILL = 9, | |
131 | LINUX_SIGUSR1 = 10, | |
132 | LINUX_SIGSEGV = 11, | |
133 | LINUX_SIGUSR2 = 12, | |
134 | LINUX_SIGPIPE = 13, | |
135 | LINUX_SIGALRM = 14, | |
136 | LINUX_SIGTERM = 15, | |
137 | LINUX_SIGSTKFLT = 16, | |
138 | LINUX_SIGCHLD = 17, | |
139 | LINUX_SIGCONT = 18, | |
140 | LINUX_SIGSTOP = 19, | |
141 | LINUX_SIGTSTP = 20, | |
142 | LINUX_SIGTTIN = 21, | |
143 | LINUX_SIGTTOU = 22, | |
144 | LINUX_SIGURG = 23, | |
145 | LINUX_SIGXCPU = 24, | |
146 | LINUX_SIGXFSZ = 25, | |
147 | LINUX_SIGVTALRM = 26, | |
148 | LINUX_SIGPROF = 27, | |
149 | LINUX_SIGWINCH = 28, | |
150 | LINUX_SIGIO = 29, | |
151 | LINUX_SIGPOLL = LINUX_SIGIO, | |
152 | LINUX_SIGPWR = 30, | |
153 | LINUX_SIGSYS = 31, | |
154 | LINUX_SIGUNUSED = 31, | |
155 | ||
156 | LINUX_SIGRTMIN = 32, | |
157 | LINUX_SIGRTMAX = 64, | |
158 | }; | |
159 | ||
06253dd3 JK |
160 | static struct gdbarch_data *linux_gdbarch_data_handle; |
161 | ||
162 | struct linux_gdbarch_data | |
163 | { | |
164 | struct type *siginfo_type; | |
165 | }; | |
166 | ||
167 | static void * | |
168 | init_linux_gdbarch_data (struct gdbarch *gdbarch) | |
169 | { | |
170 | return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct linux_gdbarch_data); | |
171 | } | |
172 | ||
173 | static struct linux_gdbarch_data * | |
174 | get_linux_gdbarch_data (struct gdbarch *gdbarch) | |
175 | { | |
9a3c8263 SM |
176 | return ((struct linux_gdbarch_data *) |
177 | gdbarch_data (gdbarch, linux_gdbarch_data_handle)); | |
06253dd3 JK |
178 | } |
179 | ||
cdfa0b0a PA |
180 | /* Per-inferior data key. */ |
181 | static const struct inferior_data *linux_inferior_data; | |
182 | ||
183 | /* Linux-specific cached data. This is used by GDB for caching | |
184 | purposes for each inferior. This helps reduce the overhead of | |
185 | transfering data from a remote target to the local host. */ | |
186 | struct linux_info | |
187 | { | |
188 | /* Cache of the inferior's vsyscall/vDSO mapping range. Only valid | |
189 | if VSYSCALL_RANGE_P is positive. This is cached because getting | |
190 | at this info requires an auxv lookup (which is itself cached), | |
191 | and looking through the inferior's mappings (which change | |
192 | throughout execution and therefore cannot be cached). */ | |
193 | struct mem_range vsyscall_range; | |
194 | ||
195 | /* Zero if we haven't tried looking up the vsyscall's range before | |
196 | yet. Positive if we tried looking it up, and found it. Negative | |
197 | if we tried looking it up but failed. */ | |
198 | int vsyscall_range_p; | |
199 | }; | |
200 | ||
201 | /* Frees whatever allocated space there is to be freed and sets INF's | |
202 | linux cache data pointer to NULL. */ | |
203 | ||
204 | static void | |
205 | invalidate_linux_cache_inf (struct inferior *inf) | |
206 | { | |
207 | struct linux_info *info; | |
208 | ||
9a3c8263 | 209 | info = (struct linux_info *) inferior_data (inf, linux_inferior_data); |
cdfa0b0a PA |
210 | if (info != NULL) |
211 | { | |
212 | xfree (info); | |
213 | set_inferior_data (inf, linux_inferior_data, NULL); | |
214 | } | |
215 | } | |
216 | ||
217 | /* Handles the cleanup of the linux cache for inferior INF. ARG is | |
218 | ignored. Callback for the inferior_appeared and inferior_exit | |
219 | events. */ | |
220 | ||
221 | static void | |
222 | linux_inferior_data_cleanup (struct inferior *inf, void *arg) | |
223 | { | |
224 | invalidate_linux_cache_inf (inf); | |
225 | } | |
226 | ||
227 | /* Fetch the linux cache info for INF. This function always returns a | |
228 | valid INFO pointer. */ | |
229 | ||
230 | static struct linux_info * | |
231 | get_linux_inferior_data (void) | |
232 | { | |
233 | struct linux_info *info; | |
234 | struct inferior *inf = current_inferior (); | |
235 | ||
9a3c8263 | 236 | info = (struct linux_info *) inferior_data (inf, linux_inferior_data); |
cdfa0b0a PA |
237 | if (info == NULL) |
238 | { | |
239 | info = XCNEW (struct linux_info); | |
240 | set_inferior_data (inf, linux_inferior_data, info); | |
241 | } | |
242 | ||
243 | return info; | |
244 | } | |
245 | ||
190b495d | 246 | /* See linux-tdep.h. */ |
4aa995e1 | 247 | |
190b495d | 248 | struct type * |
43564574 WT |
249 | linux_get_siginfo_type_with_fields (struct gdbarch *gdbarch, |
250 | linux_siginfo_extra_fields extra_fields) | |
4aa995e1 | 251 | { |
06253dd3 | 252 | struct linux_gdbarch_data *linux_gdbarch_data; |
96b5c49f | 253 | struct type *int_type, *uint_type, *long_type, *void_ptr_type, *short_type; |
4aa995e1 PA |
254 | struct type *uid_type, *pid_type; |
255 | struct type *sigval_type, *clock_type; | |
256 | struct type *siginfo_type, *sifields_type; | |
257 | struct type *type; | |
258 | ||
06253dd3 JK |
259 | linux_gdbarch_data = get_linux_gdbarch_data (gdbarch); |
260 | if (linux_gdbarch_data->siginfo_type != NULL) | |
261 | return linux_gdbarch_data->siginfo_type; | |
262 | ||
e9bb382b UW |
263 | int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), |
264 | 0, "int"); | |
265 | uint_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
266 | 1, "unsigned int"); | |
267 | long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), | |
268 | 0, "long"); | |
96b5c49f WT |
269 | short_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), |
270 | 0, "short"); | |
4aa995e1 PA |
271 | void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void); |
272 | ||
273 | /* sival_t */ | |
e9bb382b | 274 | sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); |
4aa995e1 PA |
275 | TYPE_NAME (sigval_type) = xstrdup ("sigval_t"); |
276 | append_composite_type_field (sigval_type, "sival_int", int_type); | |
277 | append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type); | |
278 | ||
279 | /* __pid_t */ | |
e3aa49af MS |
280 | pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
281 | TYPE_LENGTH (int_type), "__pid_t"); | |
4aa995e1 | 282 | TYPE_TARGET_TYPE (pid_type) = int_type; |
e9bb382b | 283 | TYPE_TARGET_STUB (pid_type) = 1; |
4aa995e1 PA |
284 | |
285 | /* __uid_t */ | |
e3aa49af MS |
286 | uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
287 | TYPE_LENGTH (uint_type), "__uid_t"); | |
4aa995e1 | 288 | TYPE_TARGET_TYPE (uid_type) = uint_type; |
e9bb382b | 289 | TYPE_TARGET_STUB (uid_type) = 1; |
4aa995e1 PA |
290 | |
291 | /* __clock_t */ | |
e3aa49af MS |
292 | clock_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
293 | TYPE_LENGTH (long_type), "__clock_t"); | |
4aa995e1 | 294 | TYPE_TARGET_TYPE (clock_type) = long_type; |
e9bb382b | 295 | TYPE_TARGET_STUB (clock_type) = 1; |
4aa995e1 PA |
296 | |
297 | /* _sifields */ | |
e9bb382b | 298 | sifields_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); |
4aa995e1 PA |
299 | |
300 | { | |
301 | const int si_max_size = 128; | |
302 | int si_pad_size; | |
303 | int size_of_int = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT; | |
304 | ||
305 | /* _pad */ | |
306 | if (gdbarch_ptr_bit (gdbarch) == 64) | |
307 | si_pad_size = (si_max_size / size_of_int) - 4; | |
308 | else | |
309 | si_pad_size = (si_max_size / size_of_int) - 3; | |
310 | append_composite_type_field (sifields_type, "_pad", | |
311 | init_vector_type (int_type, si_pad_size)); | |
312 | } | |
313 | ||
314 | /* _kill */ | |
e9bb382b | 315 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
316 | append_composite_type_field (type, "si_pid", pid_type); |
317 | append_composite_type_field (type, "si_uid", uid_type); | |
318 | append_composite_type_field (sifields_type, "_kill", type); | |
319 | ||
320 | /* _timer */ | |
e9bb382b | 321 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
322 | append_composite_type_field (type, "si_tid", int_type); |
323 | append_composite_type_field (type, "si_overrun", int_type); | |
324 | append_composite_type_field (type, "si_sigval", sigval_type); | |
325 | append_composite_type_field (sifields_type, "_timer", type); | |
326 | ||
327 | /* _rt */ | |
e9bb382b | 328 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
329 | append_composite_type_field (type, "si_pid", pid_type); |
330 | append_composite_type_field (type, "si_uid", uid_type); | |
331 | append_composite_type_field (type, "si_sigval", sigval_type); | |
332 | append_composite_type_field (sifields_type, "_rt", type); | |
333 | ||
334 | /* _sigchld */ | |
e9bb382b | 335 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
336 | append_composite_type_field (type, "si_pid", pid_type); |
337 | append_composite_type_field (type, "si_uid", uid_type); | |
338 | append_composite_type_field (type, "si_status", int_type); | |
339 | append_composite_type_field (type, "si_utime", clock_type); | |
340 | append_composite_type_field (type, "si_stime", clock_type); | |
341 | append_composite_type_field (sifields_type, "_sigchld", type); | |
342 | ||
343 | /* _sigfault */ | |
e9bb382b | 344 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 | 345 | append_composite_type_field (type, "si_addr", void_ptr_type); |
96b5c49f WT |
346 | |
347 | /* Additional bound fields for _sigfault in case they were requested. */ | |
348 | if ((extra_fields & LINUX_SIGINFO_FIELD_ADDR_BND) != 0) | |
349 | { | |
350 | struct type *sigfault_bnd_fields; | |
351 | ||
352 | append_composite_type_field (type, "_addr_lsb", short_type); | |
353 | sigfault_bnd_fields = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); | |
354 | append_composite_type_field (sigfault_bnd_fields, "_lower", void_ptr_type); | |
355 | append_composite_type_field (sigfault_bnd_fields, "_upper", void_ptr_type); | |
356 | append_composite_type_field (type, "_addr_bnd", sigfault_bnd_fields); | |
357 | } | |
4aa995e1 PA |
358 | append_composite_type_field (sifields_type, "_sigfault", type); |
359 | ||
360 | /* _sigpoll */ | |
e9bb382b | 361 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
362 | append_composite_type_field (type, "si_band", long_type); |
363 | append_composite_type_field (type, "si_fd", int_type); | |
364 | append_composite_type_field (sifields_type, "_sigpoll", type); | |
365 | ||
366 | /* struct siginfo */ | |
e9bb382b | 367 | siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
368 | TYPE_NAME (siginfo_type) = xstrdup ("siginfo"); |
369 | append_composite_type_field (siginfo_type, "si_signo", int_type); | |
370 | append_composite_type_field (siginfo_type, "si_errno", int_type); | |
371 | append_composite_type_field (siginfo_type, "si_code", int_type); | |
372 | append_composite_type_field_aligned (siginfo_type, | |
373 | "_sifields", sifields_type, | |
374 | TYPE_LENGTH (long_type)); | |
375 | ||
06253dd3 JK |
376 | linux_gdbarch_data->siginfo_type = siginfo_type; |
377 | ||
4aa995e1 PA |
378 | return siginfo_type; |
379 | } | |
6b3ae818 | 380 | |
43564574 WT |
381 | /* This function is suitable for architectures that don't |
382 | extend/override the standard siginfo structure. */ | |
383 | ||
384 | static struct type * | |
385 | linux_get_siginfo_type (struct gdbarch *gdbarch) | |
386 | { | |
387 | return linux_get_siginfo_type_with_fields (gdbarch, 0); | |
388 | } | |
389 | ||
c01cbb3d YQ |
390 | /* Return true if the target is running on uClinux instead of normal |
391 | Linux kernel. */ | |
392 | ||
393 | int | |
394 | linux_is_uclinux (void) | |
6c95b8df | 395 | { |
6c95b8df | 396 | CORE_ADDR dummy; |
6c95b8df | 397 | |
c01cbb3d YQ |
398 | return (target_auxv_search (¤t_target, AT_NULL, &dummy) > 0 |
399 | && target_auxv_search (¤t_target, AT_PAGESZ, &dummy) == 0); | |
400 | } | |
6c95b8df | 401 | |
c01cbb3d YQ |
402 | static int |
403 | linux_has_shared_address_space (struct gdbarch *gdbarch) | |
404 | { | |
405 | return linux_is_uclinux (); | |
6c95b8df | 406 | } |
a5ee0f0c PA |
407 | |
408 | /* This is how we want PTIDs from core files to be printed. */ | |
409 | ||
410 | static char * | |
411 | linux_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid) | |
412 | { | |
413 | static char buf[80]; | |
414 | ||
415 | if (ptid_get_lwp (ptid) != 0) | |
416 | { | |
417 | snprintf (buf, sizeof (buf), "LWP %ld", ptid_get_lwp (ptid)); | |
418 | return buf; | |
419 | } | |
420 | ||
421 | return normal_pid_to_str (ptid); | |
422 | } | |
423 | ||
db1ff28b JK |
424 | /* Service function for corefiles and info proc. */ |
425 | ||
426 | static void | |
427 | read_mapping (const char *line, | |
428 | ULONGEST *addr, ULONGEST *endaddr, | |
429 | const char **permissions, size_t *permissions_len, | |
430 | ULONGEST *offset, | |
431 | const char **device, size_t *device_len, | |
432 | ULONGEST *inode, | |
433 | const char **filename) | |
434 | { | |
435 | const char *p = line; | |
436 | ||
437 | *addr = strtoulst (p, &p, 16); | |
438 | if (*p == '-') | |
439 | p++; | |
440 | *endaddr = strtoulst (p, &p, 16); | |
441 | ||
442 | p = skip_spaces_const (p); | |
443 | *permissions = p; | |
444 | while (*p && !isspace (*p)) | |
445 | p++; | |
446 | *permissions_len = p - *permissions; | |
447 | ||
448 | *offset = strtoulst (p, &p, 16); | |
449 | ||
450 | p = skip_spaces_const (p); | |
451 | *device = p; | |
452 | while (*p && !isspace (*p)) | |
453 | p++; | |
454 | *device_len = p - *device; | |
455 | ||
456 | *inode = strtoulst (p, &p, 10); | |
457 | ||
458 | p = skip_spaces_const (p); | |
459 | *filename = p; | |
460 | } | |
461 | ||
462 | /* Helper function to decode the "VmFlags" field in /proc/PID/smaps. | |
463 | ||
464 | This function was based on the documentation found on | |
465 | <Documentation/filesystems/proc.txt>, on the Linux kernel. | |
466 | ||
467 | Linux kernels before commit | |
468 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10) do not have this | |
469 | field on smaps. */ | |
470 | ||
471 | static void | |
472 | decode_vmflags (char *p, struct smaps_vmflags *v) | |
473 | { | |
474 | char *saveptr = NULL; | |
475 | const char *s; | |
476 | ||
477 | v->initialized_p = 1; | |
478 | p = skip_to_space (p); | |
479 | p = skip_spaces (p); | |
480 | ||
481 | for (s = strtok_r (p, " ", &saveptr); | |
482 | s != NULL; | |
483 | s = strtok_r (NULL, " ", &saveptr)) | |
484 | { | |
485 | if (strcmp (s, "io") == 0) | |
486 | v->io_page = 1; | |
487 | else if (strcmp (s, "ht") == 0) | |
488 | v->uses_huge_tlb = 1; | |
489 | else if (strcmp (s, "dd") == 0) | |
490 | v->exclude_coredump = 1; | |
491 | else if (strcmp (s, "sh") == 0) | |
492 | v->shared_mapping = 1; | |
493 | } | |
494 | } | |
495 | ||
496 | /* Return 1 if the memory mapping is anonymous, 0 otherwise. | |
497 | ||
498 | FILENAME is the name of the file present in the first line of the | |
499 | memory mapping, in the "/proc/PID/smaps" output. For example, if | |
500 | the first line is: | |
501 | ||
502 | 7fd0ca877000-7fd0d0da0000 r--p 00000000 fd:02 2100770 /path/to/file | |
503 | ||
504 | Then FILENAME will be "/path/to/file". */ | |
505 | ||
506 | static int | |
507 | mapping_is_anonymous_p (const char *filename) | |
508 | { | |
509 | static regex_t dev_zero_regex, shmem_file_regex, file_deleted_regex; | |
510 | static int init_regex_p = 0; | |
511 | ||
512 | if (!init_regex_p) | |
513 | { | |
514 | struct cleanup *c = make_cleanup (null_cleanup, NULL); | |
515 | ||
516 | /* Let's be pessimistic and assume there will be an error while | |
517 | compiling the regex'es. */ | |
518 | init_regex_p = -1; | |
519 | ||
520 | /* DEV_ZERO_REGEX matches "/dev/zero" filenames (with or | |
521 | without the "(deleted)" string in the end). We know for | |
522 | sure, based on the Linux kernel code, that memory mappings | |
523 | whose associated filename is "/dev/zero" are guaranteed to be | |
524 | MAP_ANONYMOUS. */ | |
525 | compile_rx_or_error (&dev_zero_regex, "^/dev/zero\\( (deleted)\\)\\?$", | |
526 | _("Could not compile regex to match /dev/zero " | |
527 | "filename")); | |
528 | /* SHMEM_FILE_REGEX matches "/SYSV%08x" filenames (with or | |
529 | without the "(deleted)" string in the end). These filenames | |
530 | refer to shared memory (shmem), and memory mappings | |
531 | associated with them are MAP_ANONYMOUS as well. */ | |
532 | compile_rx_or_error (&shmem_file_regex, | |
533 | "^/\\?SYSV[0-9a-fA-F]\\{8\\}\\( (deleted)\\)\\?$", | |
534 | _("Could not compile regex to match shmem " | |
535 | "filenames")); | |
536 | /* FILE_DELETED_REGEX is a heuristic we use to try to mimic the | |
537 | Linux kernel's 'n_link == 0' code, which is responsible to | |
538 | decide if it is dealing with a 'MAP_SHARED | MAP_ANONYMOUS' | |
539 | mapping. In other words, if FILE_DELETED_REGEX matches, it | |
540 | does not necessarily mean that we are dealing with an | |
541 | anonymous shared mapping. However, there is no easy way to | |
542 | detect this currently, so this is the best approximation we | |
543 | have. | |
544 | ||
545 | As a result, GDB will dump readonly pages of deleted | |
546 | executables when using the default value of coredump_filter | |
547 | (0x33), while the Linux kernel will not dump those pages. | |
548 | But we can live with that. */ | |
549 | compile_rx_or_error (&file_deleted_regex, " (deleted)$", | |
550 | _("Could not compile regex to match " | |
551 | "'<file> (deleted)'")); | |
552 | /* We will never release these regexes, so just discard the | |
553 | cleanups. */ | |
554 | discard_cleanups (c); | |
555 | ||
556 | /* If we reached this point, then everything succeeded. */ | |
557 | init_regex_p = 1; | |
558 | } | |
559 | ||
560 | if (init_regex_p == -1) | |
561 | { | |
562 | const char deleted[] = " (deleted)"; | |
563 | size_t del_len = sizeof (deleted) - 1; | |
564 | size_t filename_len = strlen (filename); | |
565 | ||
566 | /* There was an error while compiling the regex'es above. In | |
567 | order to try to give some reliable information to the caller, | |
568 | we just try to find the string " (deleted)" in the filename. | |
569 | If we managed to find it, then we assume the mapping is | |
570 | anonymous. */ | |
571 | return (filename_len >= del_len | |
572 | && strcmp (filename + filename_len - del_len, deleted) == 0); | |
573 | } | |
574 | ||
575 | if (*filename == '\0' | |
576 | || regexec (&dev_zero_regex, filename, 0, NULL, 0) == 0 | |
577 | || regexec (&shmem_file_regex, filename, 0, NULL, 0) == 0 | |
578 | || regexec (&file_deleted_regex, filename, 0, NULL, 0) == 0) | |
579 | return 1; | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
584 | /* Return 0 if the memory mapping (which is related to FILTERFLAGS, V, | |
585 | MAYBE_PRIVATE_P, and MAPPING_ANONYMOUS_P) should not be dumped, or | |
586 | greater than 0 if it should. | |
587 | ||
588 | In a nutshell, this is the logic that we follow in order to decide | |
589 | if a mapping should be dumped or not. | |
590 | ||
591 | - If the mapping is associated to a file whose name ends with | |
592 | " (deleted)", or if the file is "/dev/zero", or if it is | |
593 | "/SYSV%08x" (shared memory), or if there is no file associated | |
594 | with it, or if the AnonHugePages: or the Anonymous: fields in the | |
595 | /proc/PID/smaps have contents, then GDB considers this mapping to | |
596 | be anonymous. Otherwise, GDB considers this mapping to be a | |
597 | file-backed mapping (because there will be a file associated with | |
598 | it). | |
599 | ||
600 | It is worth mentioning that, from all those checks described | |
601 | above, the most fragile is the one to see if the file name ends | |
602 | with " (deleted)". This does not necessarily mean that the | |
603 | mapping is anonymous, because the deleted file associated with | |
604 | the mapping may have been a hard link to another file, for | |
605 | example. The Linux kernel checks to see if "i_nlink == 0", but | |
606 | GDB cannot easily (and normally) do this check (iff running as | |
607 | root, it could find the mapping in /proc/PID/map_files/ and | |
608 | determine whether there still are other hard links to the | |
609 | inode/file). Therefore, we made a compromise here, and we assume | |
610 | that if the file name ends with " (deleted)", then the mapping is | |
611 | indeed anonymous. FWIW, this is something the Linux kernel could | |
612 | do better: expose this information in a more direct way. | |
613 | ||
614 | - If we see the flag "sh" in the "VmFlags:" field (in | |
615 | /proc/PID/smaps), then certainly the memory mapping is shared | |
616 | (VM_SHARED). If we have access to the VmFlags, and we don't see | |
617 | the "sh" there, then certainly the mapping is private. However, | |
618 | Linux kernels before commit | |
619 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10) do not have the | |
620 | "VmFlags:" field; in that case, we use another heuristic: if we | |
621 | see 'p' in the permission flags, then we assume that the mapping | |
622 | is private, even though the presence of the 's' flag there would | |
623 | mean VM_MAYSHARE, which means the mapping could still be private. | |
624 | This should work OK enough, however. */ | |
625 | ||
626 | static int | |
8d297bbf | 627 | dump_mapping_p (filter_flags filterflags, const struct smaps_vmflags *v, |
db1ff28b JK |
628 | int maybe_private_p, int mapping_anon_p, int mapping_file_p, |
629 | const char *filename) | |
630 | { | |
631 | /* Initially, we trust in what we received from our caller. This | |
632 | value may not be very precise (i.e., it was probably gathered | |
633 | from the permission line in the /proc/PID/smaps list, which | |
634 | actually refers to VM_MAYSHARE, and not VM_SHARED), but it is | |
635 | what we have until we take a look at the "VmFlags:" field | |
636 | (assuming that the version of the Linux kernel being used | |
637 | supports it, of course). */ | |
638 | int private_p = maybe_private_p; | |
639 | ||
640 | /* We always dump vDSO and vsyscall mappings, because it's likely that | |
641 | there'll be no file to read the contents from at core load time. | |
642 | The kernel does the same. */ | |
643 | if (strcmp ("[vdso]", filename) == 0 | |
644 | || strcmp ("[vsyscall]", filename) == 0) | |
645 | return 1; | |
646 | ||
647 | if (v->initialized_p) | |
648 | { | |
649 | /* We never dump I/O mappings. */ | |
650 | if (v->io_page) | |
651 | return 0; | |
652 | ||
653 | /* Check if we should exclude this mapping. */ | |
654 | if (v->exclude_coredump) | |
655 | return 0; | |
656 | ||
657 | /* Update our notion of whether this mapping is shared or | |
658 | private based on a trustworthy value. */ | |
659 | private_p = !v->shared_mapping; | |
660 | ||
661 | /* HugeTLB checking. */ | |
662 | if (v->uses_huge_tlb) | |
663 | { | |
664 | if ((private_p && (filterflags & COREFILTER_HUGETLB_PRIVATE)) | |
665 | || (!private_p && (filterflags & COREFILTER_HUGETLB_SHARED))) | |
666 | return 1; | |
667 | ||
668 | return 0; | |
669 | } | |
670 | } | |
671 | ||
672 | if (private_p) | |
673 | { | |
674 | if (mapping_anon_p && mapping_file_p) | |
675 | { | |
676 | /* This is a special situation. It can happen when we see a | |
677 | mapping that is file-backed, but that contains anonymous | |
678 | pages. */ | |
679 | return ((filterflags & COREFILTER_ANON_PRIVATE) != 0 | |
680 | || (filterflags & COREFILTER_MAPPED_PRIVATE) != 0); | |
681 | } | |
682 | else if (mapping_anon_p) | |
683 | return (filterflags & COREFILTER_ANON_PRIVATE) != 0; | |
684 | else | |
685 | return (filterflags & COREFILTER_MAPPED_PRIVATE) != 0; | |
686 | } | |
687 | else | |
688 | { | |
689 | if (mapping_anon_p && mapping_file_p) | |
690 | { | |
691 | /* This is a special situation. It can happen when we see a | |
692 | mapping that is file-backed, but that contains anonymous | |
693 | pages. */ | |
694 | return ((filterflags & COREFILTER_ANON_SHARED) != 0 | |
695 | || (filterflags & COREFILTER_MAPPED_SHARED) != 0); | |
696 | } | |
697 | else if (mapping_anon_p) | |
698 | return (filterflags & COREFILTER_ANON_SHARED) != 0; | |
699 | else | |
700 | return (filterflags & COREFILTER_MAPPED_SHARED) != 0; | |
701 | } | |
702 | } | |
703 | ||
3030c96e UW |
704 | /* Implement the "info proc" command. */ |
705 | ||
706 | static void | |
7bc112c1 | 707 | linux_info_proc (struct gdbarch *gdbarch, const char *args, |
3030c96e UW |
708 | enum info_proc_what what) |
709 | { | |
710 | /* A long is used for pid instead of an int to avoid a loss of precision | |
711 | compiler warning from the output of strtoul. */ | |
712 | long pid; | |
713 | int cmdline_f = (what == IP_MINIMAL || what == IP_CMDLINE || what == IP_ALL); | |
714 | int cwd_f = (what == IP_MINIMAL || what == IP_CWD || what == IP_ALL); | |
715 | int exe_f = (what == IP_MINIMAL || what == IP_EXE || what == IP_ALL); | |
716 | int mappings_f = (what == IP_MAPPINGS || what == IP_ALL); | |
717 | int status_f = (what == IP_STATUS || what == IP_ALL); | |
718 | int stat_f = (what == IP_STAT || what == IP_ALL); | |
719 | char filename[100]; | |
001f13d8 | 720 | char *data; |
3030c96e UW |
721 | int target_errno; |
722 | ||
723 | if (args && isdigit (args[0])) | |
7bc112c1 TT |
724 | { |
725 | char *tem; | |
726 | ||
727 | pid = strtoul (args, &tem, 10); | |
728 | args = tem; | |
729 | } | |
3030c96e UW |
730 | else |
731 | { | |
732 | if (!target_has_execution) | |
733 | error (_("No current process: you must name one.")); | |
734 | if (current_inferior ()->fake_pid_p) | |
735 | error (_("Can't determine the current process's PID: you must name one.")); | |
736 | ||
737 | pid = current_inferior ()->pid; | |
738 | } | |
739 | ||
7bc112c1 | 740 | args = skip_spaces_const (args); |
3030c96e UW |
741 | if (args && args[0]) |
742 | error (_("Too many parameters: %s"), args); | |
743 | ||
744 | printf_filtered (_("process %ld\n"), pid); | |
745 | if (cmdline_f) | |
746 | { | |
747 | xsnprintf (filename, sizeof filename, "/proc/%ld/cmdline", pid); | |
07c138c8 | 748 | data = target_fileio_read_stralloc (NULL, filename); |
3030c96e UW |
749 | if (data) |
750 | { | |
751 | struct cleanup *cleanup = make_cleanup (xfree, data); | |
752 | printf_filtered ("cmdline = '%s'\n", data); | |
753 | do_cleanups (cleanup); | |
754 | } | |
755 | else | |
756 | warning (_("unable to open /proc file '%s'"), filename); | |
757 | } | |
758 | if (cwd_f) | |
759 | { | |
760 | xsnprintf (filename, sizeof filename, "/proc/%ld/cwd", pid); | |
07c138c8 | 761 | data = target_fileio_readlink (NULL, filename, &target_errno); |
3030c96e UW |
762 | if (data) |
763 | { | |
764 | struct cleanup *cleanup = make_cleanup (xfree, data); | |
765 | printf_filtered ("cwd = '%s'\n", data); | |
766 | do_cleanups (cleanup); | |
767 | } | |
768 | else | |
769 | warning (_("unable to read link '%s'"), filename); | |
770 | } | |
771 | if (exe_f) | |
772 | { | |
773 | xsnprintf (filename, sizeof filename, "/proc/%ld/exe", pid); | |
07c138c8 | 774 | data = target_fileio_readlink (NULL, filename, &target_errno); |
3030c96e UW |
775 | if (data) |
776 | { | |
777 | struct cleanup *cleanup = make_cleanup (xfree, data); | |
778 | printf_filtered ("exe = '%s'\n", data); | |
779 | do_cleanups (cleanup); | |
780 | } | |
781 | else | |
782 | warning (_("unable to read link '%s'"), filename); | |
783 | } | |
784 | if (mappings_f) | |
785 | { | |
786 | xsnprintf (filename, sizeof filename, "/proc/%ld/maps", pid); | |
07c138c8 | 787 | data = target_fileio_read_stralloc (NULL, filename); |
3030c96e UW |
788 | if (data) |
789 | { | |
790 | struct cleanup *cleanup = make_cleanup (xfree, data); | |
791 | char *line; | |
792 | ||
793 | printf_filtered (_("Mapped address spaces:\n\n")); | |
794 | if (gdbarch_addr_bit (gdbarch) == 32) | |
795 | { | |
796 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
797 | "Start Addr", | |
798 | " End Addr", | |
799 | " Size", " Offset", "objfile"); | |
800 | } | |
801 | else | |
802 | { | |
803 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
804 | "Start Addr", | |
805 | " End Addr", | |
806 | " Size", " Offset", "objfile"); | |
807 | } | |
808 | ||
809 | for (line = strtok (data, "\n"); line; line = strtok (NULL, "\n")) | |
810 | { | |
811 | ULONGEST addr, endaddr, offset, inode; | |
812 | const char *permissions, *device, *filename; | |
813 | size_t permissions_len, device_len; | |
814 | ||
815 | read_mapping (line, &addr, &endaddr, | |
816 | &permissions, &permissions_len, | |
817 | &offset, &device, &device_len, | |
818 | &inode, &filename); | |
819 | ||
820 | if (gdbarch_addr_bit (gdbarch) == 32) | |
821 | { | |
822 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
823 | paddress (gdbarch, addr), | |
824 | paddress (gdbarch, endaddr), | |
825 | hex_string (endaddr - addr), | |
826 | hex_string (offset), | |
827 | *filename? filename : ""); | |
828 | } | |
829 | else | |
830 | { | |
831 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
832 | paddress (gdbarch, addr), | |
833 | paddress (gdbarch, endaddr), | |
834 | hex_string (endaddr - addr), | |
835 | hex_string (offset), | |
836 | *filename? filename : ""); | |
837 | } | |
838 | } | |
839 | ||
840 | do_cleanups (cleanup); | |
841 | } | |
842 | else | |
843 | warning (_("unable to open /proc file '%s'"), filename); | |
844 | } | |
845 | if (status_f) | |
846 | { | |
847 | xsnprintf (filename, sizeof filename, "/proc/%ld/status", pid); | |
07c138c8 | 848 | data = target_fileio_read_stralloc (NULL, filename); |
3030c96e UW |
849 | if (data) |
850 | { | |
851 | struct cleanup *cleanup = make_cleanup (xfree, data); | |
852 | puts_filtered (data); | |
853 | do_cleanups (cleanup); | |
854 | } | |
855 | else | |
856 | warning (_("unable to open /proc file '%s'"), filename); | |
857 | } | |
858 | if (stat_f) | |
859 | { | |
860 | xsnprintf (filename, sizeof filename, "/proc/%ld/stat", pid); | |
07c138c8 | 861 | data = target_fileio_read_stralloc (NULL, filename); |
3030c96e UW |
862 | if (data) |
863 | { | |
864 | struct cleanup *cleanup = make_cleanup (xfree, data); | |
865 | const char *p = data; | |
3030c96e UW |
866 | |
867 | printf_filtered (_("Process: %s\n"), | |
868 | pulongest (strtoulst (p, &p, 10))); | |
869 | ||
529480d0 | 870 | p = skip_spaces_const (p); |
a71b5a38 | 871 | if (*p == '(') |
3030c96e | 872 | { |
184cd072 JK |
873 | /* ps command also relies on no trailing fields |
874 | ever contain ')'. */ | |
875 | const char *ep = strrchr (p, ')'); | |
a71b5a38 UW |
876 | if (ep != NULL) |
877 | { | |
878 | printf_filtered ("Exec file: %.*s\n", | |
879 | (int) (ep - p - 1), p + 1); | |
880 | p = ep + 1; | |
881 | } | |
3030c96e UW |
882 | } |
883 | ||
529480d0 | 884 | p = skip_spaces_const (p); |
3030c96e UW |
885 | if (*p) |
886 | printf_filtered (_("State: %c\n"), *p++); | |
887 | ||
888 | if (*p) | |
889 | printf_filtered (_("Parent process: %s\n"), | |
890 | pulongest (strtoulst (p, &p, 10))); | |
891 | if (*p) | |
892 | printf_filtered (_("Process group: %s\n"), | |
893 | pulongest (strtoulst (p, &p, 10))); | |
894 | if (*p) | |
895 | printf_filtered (_("Session id: %s\n"), | |
896 | pulongest (strtoulst (p, &p, 10))); | |
897 | if (*p) | |
898 | printf_filtered (_("TTY: %s\n"), | |
899 | pulongest (strtoulst (p, &p, 10))); | |
900 | if (*p) | |
901 | printf_filtered (_("TTY owner process group: %s\n"), | |
902 | pulongest (strtoulst (p, &p, 10))); | |
903 | ||
904 | if (*p) | |
905 | printf_filtered (_("Flags: %s\n"), | |
906 | hex_string (strtoulst (p, &p, 10))); | |
907 | if (*p) | |
908 | printf_filtered (_("Minor faults (no memory page): %s\n"), | |
909 | pulongest (strtoulst (p, &p, 10))); | |
910 | if (*p) | |
911 | printf_filtered (_("Minor faults, children: %s\n"), | |
912 | pulongest (strtoulst (p, &p, 10))); | |
913 | if (*p) | |
914 | printf_filtered (_("Major faults (memory page faults): %s\n"), | |
915 | pulongest (strtoulst (p, &p, 10))); | |
916 | if (*p) | |
917 | printf_filtered (_("Major faults, children: %s\n"), | |
918 | pulongest (strtoulst (p, &p, 10))); | |
919 | if (*p) | |
920 | printf_filtered (_("utime: %s\n"), | |
921 | pulongest (strtoulst (p, &p, 10))); | |
922 | if (*p) | |
923 | printf_filtered (_("stime: %s\n"), | |
924 | pulongest (strtoulst (p, &p, 10))); | |
925 | if (*p) | |
926 | printf_filtered (_("utime, children: %s\n"), | |
927 | pulongest (strtoulst (p, &p, 10))); | |
928 | if (*p) | |
929 | printf_filtered (_("stime, children: %s\n"), | |
930 | pulongest (strtoulst (p, &p, 10))); | |
931 | if (*p) | |
932 | printf_filtered (_("jiffies remaining in current " | |
933 | "time slice: %s\n"), | |
934 | pulongest (strtoulst (p, &p, 10))); | |
935 | if (*p) | |
936 | printf_filtered (_("'nice' value: %s\n"), | |
937 | pulongest (strtoulst (p, &p, 10))); | |
938 | if (*p) | |
939 | printf_filtered (_("jiffies until next timeout: %s\n"), | |
940 | pulongest (strtoulst (p, &p, 10))); | |
941 | if (*p) | |
942 | printf_filtered (_("jiffies until next SIGALRM: %s\n"), | |
943 | pulongest (strtoulst (p, &p, 10))); | |
944 | if (*p) | |
945 | printf_filtered (_("start time (jiffies since " | |
946 | "system boot): %s\n"), | |
947 | pulongest (strtoulst (p, &p, 10))); | |
948 | if (*p) | |
949 | printf_filtered (_("Virtual memory size: %s\n"), | |
950 | pulongest (strtoulst (p, &p, 10))); | |
951 | if (*p) | |
952 | printf_filtered (_("Resident set size: %s\n"), | |
953 | pulongest (strtoulst (p, &p, 10))); | |
954 | if (*p) | |
955 | printf_filtered (_("rlim: %s\n"), | |
956 | pulongest (strtoulst (p, &p, 10))); | |
957 | if (*p) | |
958 | printf_filtered (_("Start of text: %s\n"), | |
959 | hex_string (strtoulst (p, &p, 10))); | |
960 | if (*p) | |
961 | printf_filtered (_("End of text: %s\n"), | |
962 | hex_string (strtoulst (p, &p, 10))); | |
963 | if (*p) | |
964 | printf_filtered (_("Start of stack: %s\n"), | |
965 | hex_string (strtoulst (p, &p, 10))); | |
966 | #if 0 /* Don't know how architecture-dependent the rest is... | |
967 | Anyway the signal bitmap info is available from "status". */ | |
968 | if (*p) | |
969 | printf_filtered (_("Kernel stack pointer: %s\n"), | |
970 | hex_string (strtoulst (p, &p, 10))); | |
971 | if (*p) | |
972 | printf_filtered (_("Kernel instr pointer: %s\n"), | |
973 | hex_string (strtoulst (p, &p, 10))); | |
974 | if (*p) | |
975 | printf_filtered (_("Pending signals bitmap: %s\n"), | |
976 | hex_string (strtoulst (p, &p, 10))); | |
977 | if (*p) | |
978 | printf_filtered (_("Blocked signals bitmap: %s\n"), | |
979 | hex_string (strtoulst (p, &p, 10))); | |
980 | if (*p) | |
981 | printf_filtered (_("Ignored signals bitmap: %s\n"), | |
982 | hex_string (strtoulst (p, &p, 10))); | |
983 | if (*p) | |
984 | printf_filtered (_("Catched signals bitmap: %s\n"), | |
985 | hex_string (strtoulst (p, &p, 10))); | |
986 | if (*p) | |
987 | printf_filtered (_("wchan (system call): %s\n"), | |
988 | hex_string (strtoulst (p, &p, 10))); | |
989 | #endif | |
990 | do_cleanups (cleanup); | |
991 | } | |
992 | else | |
993 | warning (_("unable to open /proc file '%s'"), filename); | |
994 | } | |
995 | } | |
996 | ||
451b7c33 TT |
997 | /* Implement "info proc mappings" for a corefile. */ |
998 | ||
999 | static void | |
7bc112c1 | 1000 | linux_core_info_proc_mappings (struct gdbarch *gdbarch, const char *args) |
451b7c33 TT |
1001 | { |
1002 | asection *section; | |
1003 | ULONGEST count, page_size; | |
1004 | unsigned char *descdata, *filenames, *descend, *contents; | |
1005 | size_t note_size; | |
1006 | unsigned int addr_size_bits, addr_size; | |
1007 | struct cleanup *cleanup; | |
1008 | struct gdbarch *core_gdbarch = gdbarch_from_bfd (core_bfd); | |
1009 | /* We assume this for reading 64-bit core files. */ | |
1010 | gdb_static_assert (sizeof (ULONGEST) >= 8); | |
1011 | ||
1012 | section = bfd_get_section_by_name (core_bfd, ".note.linuxcore.file"); | |
1013 | if (section == NULL) | |
1014 | { | |
1015 | warning (_("unable to find mappings in core file")); | |
1016 | return; | |
1017 | } | |
1018 | ||
1019 | addr_size_bits = gdbarch_addr_bit (core_gdbarch); | |
1020 | addr_size = addr_size_bits / 8; | |
1021 | note_size = bfd_get_section_size (section); | |
1022 | ||
1023 | if (note_size < 2 * addr_size) | |
1024 | error (_("malformed core note - too short for header")); | |
1025 | ||
224c3ddb | 1026 | contents = (unsigned char *) xmalloc (note_size); |
451b7c33 TT |
1027 | cleanup = make_cleanup (xfree, contents); |
1028 | if (!bfd_get_section_contents (core_bfd, section, contents, 0, note_size)) | |
1029 | error (_("could not get core note contents")); | |
1030 | ||
1031 | descdata = contents; | |
1032 | descend = descdata + note_size; | |
1033 | ||
1034 | if (descdata[note_size - 1] != '\0') | |
1035 | error (_("malformed note - does not end with \\0")); | |
1036 | ||
1037 | count = bfd_get (addr_size_bits, core_bfd, descdata); | |
1038 | descdata += addr_size; | |
1039 | ||
1040 | page_size = bfd_get (addr_size_bits, core_bfd, descdata); | |
1041 | descdata += addr_size; | |
1042 | ||
1043 | if (note_size < 2 * addr_size + count * 3 * addr_size) | |
1044 | error (_("malformed note - too short for supplied file count")); | |
1045 | ||
1046 | printf_filtered (_("Mapped address spaces:\n\n")); | |
1047 | if (gdbarch_addr_bit (gdbarch) == 32) | |
1048 | { | |
1049 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
1050 | "Start Addr", | |
1051 | " End Addr", | |
1052 | " Size", " Offset", "objfile"); | |
1053 | } | |
1054 | else | |
1055 | { | |
1056 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
1057 | "Start Addr", | |
1058 | " End Addr", | |
1059 | " Size", " Offset", "objfile"); | |
1060 | } | |
1061 | ||
1062 | filenames = descdata + count * 3 * addr_size; | |
1063 | while (--count > 0) | |
1064 | { | |
1065 | ULONGEST start, end, file_ofs; | |
1066 | ||
1067 | if (filenames == descend) | |
1068 | error (_("malformed note - filenames end too early")); | |
1069 | ||
1070 | start = bfd_get (addr_size_bits, core_bfd, descdata); | |
1071 | descdata += addr_size; | |
1072 | end = bfd_get (addr_size_bits, core_bfd, descdata); | |
1073 | descdata += addr_size; | |
1074 | file_ofs = bfd_get (addr_size_bits, core_bfd, descdata); | |
1075 | descdata += addr_size; | |
1076 | ||
1077 | file_ofs *= page_size; | |
1078 | ||
1079 | if (gdbarch_addr_bit (gdbarch) == 32) | |
1080 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
1081 | paddress (gdbarch, start), | |
1082 | paddress (gdbarch, end), | |
1083 | hex_string (end - start), | |
1084 | hex_string (file_ofs), | |
1085 | filenames); | |
1086 | else | |
1087 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
1088 | paddress (gdbarch, start), | |
1089 | paddress (gdbarch, end), | |
1090 | hex_string (end - start), | |
1091 | hex_string (file_ofs), | |
1092 | filenames); | |
1093 | ||
1094 | filenames += 1 + strlen ((char *) filenames); | |
1095 | } | |
1096 | ||
1097 | do_cleanups (cleanup); | |
1098 | } | |
1099 | ||
1100 | /* Implement "info proc" for a corefile. */ | |
1101 | ||
1102 | static void | |
7bc112c1 | 1103 | linux_core_info_proc (struct gdbarch *gdbarch, const char *args, |
451b7c33 TT |
1104 | enum info_proc_what what) |
1105 | { | |
1106 | int exe_f = (what == IP_MINIMAL || what == IP_EXE || what == IP_ALL); | |
1107 | int mappings_f = (what == IP_MAPPINGS || what == IP_ALL); | |
1108 | ||
1109 | if (exe_f) | |
1110 | { | |
1111 | const char *exe; | |
1112 | ||
1113 | exe = bfd_core_file_failing_command (core_bfd); | |
1114 | if (exe != NULL) | |
1115 | printf_filtered ("exe = '%s'\n", exe); | |
1116 | else | |
1117 | warning (_("unable to find command name in core file")); | |
1118 | } | |
1119 | ||
1120 | if (mappings_f) | |
1121 | linux_core_info_proc_mappings (gdbarch, args); | |
1122 | ||
1123 | if (!exe_f && !mappings_f) | |
1124 | error (_("unable to handle request")); | |
1125 | } | |
1126 | ||
db1ff28b JK |
1127 | typedef int linux_find_memory_region_ftype (ULONGEST vaddr, ULONGEST size, |
1128 | ULONGEST offset, ULONGEST inode, | |
1129 | int read, int write, | |
1130 | int exec, int modified, | |
1131 | const char *filename, | |
1132 | void *data); | |
451b7c33 | 1133 | |
db1ff28b | 1134 | /* List memory regions in the inferior for a corefile. */ |
451b7c33 TT |
1135 | |
1136 | static int | |
db1ff28b JK |
1137 | linux_find_memory_regions_full (struct gdbarch *gdbarch, |
1138 | linux_find_memory_region_ftype *func, | |
1139 | void *obfd) | |
f7af1fcd | 1140 | { |
db1ff28b JK |
1141 | char mapsfilename[100]; |
1142 | char coredumpfilter_name[100]; | |
1143 | char *data, *coredumpfilterdata; | |
f7af1fcd JK |
1144 | pid_t pid; |
1145 | /* Default dump behavior of coredump_filter (0x33), according to | |
1146 | Documentation/filesystems/proc.txt from the Linux kernel | |
1147 | tree. */ | |
8d297bbf PA |
1148 | filter_flags filterflags = (COREFILTER_ANON_PRIVATE |
1149 | | COREFILTER_ANON_SHARED | |
1150 | | COREFILTER_ELF_HEADERS | |
1151 | | COREFILTER_HUGETLB_PRIVATE); | |
f7af1fcd | 1152 | |
db1ff28b | 1153 | /* We need to know the real target PID to access /proc. */ |
f7af1fcd | 1154 | if (current_inferior ()->fake_pid_p) |
db1ff28b | 1155 | return 1; |
f7af1fcd JK |
1156 | |
1157 | pid = current_inferior ()->pid; | |
1158 | ||
1159 | if (use_coredump_filter) | |
1160 | { | |
f7af1fcd JK |
1161 | xsnprintf (coredumpfilter_name, sizeof (coredumpfilter_name), |
1162 | "/proc/%d/coredump_filter", pid); | |
1163 | coredumpfilterdata = target_fileio_read_stralloc (NULL, | |
1164 | coredumpfilter_name); | |
1165 | if (coredumpfilterdata != NULL) | |
1166 | { | |
8d297bbf PA |
1167 | unsigned int flags; |
1168 | ||
1169 | sscanf (coredumpfilterdata, "%x", &flags); | |
1170 | filterflags = (enum filter_flag) flags; | |
f7af1fcd JK |
1171 | xfree (coredumpfilterdata); |
1172 | } | |
1173 | } | |
1174 | ||
db1ff28b JK |
1175 | xsnprintf (mapsfilename, sizeof mapsfilename, "/proc/%d/smaps", pid); |
1176 | data = target_fileio_read_stralloc (NULL, mapsfilename); | |
1177 | if (data == NULL) | |
1178 | { | |
1179 | /* Older Linux kernels did not support /proc/PID/smaps. */ | |
1180 | xsnprintf (mapsfilename, sizeof mapsfilename, "/proc/%d/maps", pid); | |
1181 | data = target_fileio_read_stralloc (NULL, mapsfilename); | |
1182 | } | |
1183 | ||
1184 | if (data != NULL) | |
1185 | { | |
1186 | struct cleanup *cleanup = make_cleanup (xfree, data); | |
1187 | char *line, *t; | |
1188 | ||
1189 | line = strtok_r (data, "\n", &t); | |
1190 | while (line != NULL) | |
1191 | { | |
1192 | ULONGEST addr, endaddr, offset, inode; | |
1193 | const char *permissions, *device, *filename; | |
1194 | struct smaps_vmflags v; | |
1195 | size_t permissions_len, device_len; | |
1196 | int read, write, exec, priv; | |
1197 | int has_anonymous = 0; | |
1198 | int should_dump_p = 0; | |
1199 | int mapping_anon_p; | |
1200 | int mapping_file_p; | |
1201 | ||
1202 | memset (&v, 0, sizeof (v)); | |
1203 | read_mapping (line, &addr, &endaddr, &permissions, &permissions_len, | |
1204 | &offset, &device, &device_len, &inode, &filename); | |
1205 | mapping_anon_p = mapping_is_anonymous_p (filename); | |
1206 | /* If the mapping is not anonymous, then we can consider it | |
1207 | to be file-backed. These two states (anonymous or | |
1208 | file-backed) seem to be exclusive, but they can actually | |
1209 | coexist. For example, if a file-backed mapping has | |
1210 | "Anonymous:" pages (see more below), then the Linux | |
1211 | kernel will dump this mapping when the user specified | |
1212 | that she only wants anonymous mappings in the corefile | |
1213 | (*even* when she explicitly disabled the dumping of | |
1214 | file-backed mappings). */ | |
1215 | mapping_file_p = !mapping_anon_p; | |
1216 | ||
1217 | /* Decode permissions. */ | |
1218 | read = (memchr (permissions, 'r', permissions_len) != 0); | |
1219 | write = (memchr (permissions, 'w', permissions_len) != 0); | |
1220 | exec = (memchr (permissions, 'x', permissions_len) != 0); | |
1221 | /* 'private' here actually means VM_MAYSHARE, and not | |
1222 | VM_SHARED. In order to know if a mapping is really | |
1223 | private or not, we must check the flag "sh" in the | |
1224 | VmFlags field. This is done by decode_vmflags. However, | |
1225 | if we are using a Linux kernel released before the commit | |
1226 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10), we will | |
1227 | not have the VmFlags there. In this case, there is | |
1228 | really no way to know if we are dealing with VM_SHARED, | |
1229 | so we just assume that VM_MAYSHARE is enough. */ | |
1230 | priv = memchr (permissions, 'p', permissions_len) != 0; | |
1231 | ||
1232 | /* Try to detect if region should be dumped by parsing smaps | |
1233 | counters. */ | |
1234 | for (line = strtok_r (NULL, "\n", &t); | |
1235 | line != NULL && line[0] >= 'A' && line[0] <= 'Z'; | |
1236 | line = strtok_r (NULL, "\n", &t)) | |
1237 | { | |
1238 | char keyword[64 + 1]; | |
1239 | ||
1240 | if (sscanf (line, "%64s", keyword) != 1) | |
1241 | { | |
1242 | warning (_("Error parsing {s,}maps file '%s'"), mapsfilename); | |
1243 | break; | |
1244 | } | |
1245 | ||
1246 | if (strcmp (keyword, "Anonymous:") == 0) | |
1247 | { | |
1248 | /* Older Linux kernels did not support the | |
1249 | "Anonymous:" counter. Check it here. */ | |
1250 | has_anonymous = 1; | |
1251 | } | |
1252 | else if (strcmp (keyword, "VmFlags:") == 0) | |
1253 | decode_vmflags (line, &v); | |
1254 | ||
1255 | if (strcmp (keyword, "AnonHugePages:") == 0 | |
1256 | || strcmp (keyword, "Anonymous:") == 0) | |
1257 | { | |
1258 | unsigned long number; | |
1259 | ||
1260 | if (sscanf (line, "%*s%lu", &number) != 1) | |
1261 | { | |
1262 | warning (_("Error parsing {s,}maps file '%s' number"), | |
1263 | mapsfilename); | |
1264 | break; | |
1265 | } | |
1266 | if (number > 0) | |
1267 | { | |
1268 | /* Even if we are dealing with a file-backed | |
1269 | mapping, if it contains anonymous pages we | |
1270 | consider it to be *also* an anonymous | |
1271 | mapping, because this is what the Linux | |
1272 | kernel does: | |
1273 | ||
1274 | // Dump segments that have been written to. | |
1275 | if (vma->anon_vma && FILTER(ANON_PRIVATE)) | |
1276 | goto whole; | |
1277 | ||
1278 | Note that if the mapping is already marked as | |
1279 | file-backed (i.e., mapping_file_p is | |
1280 | non-zero), then this is a special case, and | |
1281 | this mapping will be dumped either when the | |
1282 | user wants to dump file-backed *or* anonymous | |
1283 | mappings. */ | |
1284 | mapping_anon_p = 1; | |
1285 | } | |
1286 | } | |
1287 | } | |
1288 | ||
1289 | if (has_anonymous) | |
1290 | should_dump_p = dump_mapping_p (filterflags, &v, priv, | |
1291 | mapping_anon_p, mapping_file_p, | |
1292 | filename); | |
1293 | else | |
1294 | { | |
1295 | /* Older Linux kernels did not support the "Anonymous:" counter. | |
1296 | If it is missing, we can't be sure - dump all the pages. */ | |
1297 | should_dump_p = 1; | |
1298 | } | |
1299 | ||
1300 | /* Invoke the callback function to create the corefile segment. */ | |
1301 | if (should_dump_p) | |
1302 | func (addr, endaddr - addr, offset, inode, | |
1303 | read, write, exec, 1, /* MODIFIED is true because we | |
1304 | want to dump the mapping. */ | |
1305 | filename, obfd); | |
1306 | } | |
1307 | ||
1308 | do_cleanups (cleanup); | |
1309 | return 0; | |
1310 | } | |
1311 | ||
1312 | return 1; | |
1313 | } | |
1314 | ||
1315 | /* A structure for passing information through | |
1316 | linux_find_memory_regions_full. */ | |
1317 | ||
1318 | struct linux_find_memory_regions_data | |
1319 | { | |
1320 | /* The original callback. */ | |
1321 | ||
1322 | find_memory_region_ftype func; | |
1323 | ||
1324 | /* The original datum. */ | |
1325 | ||
1326 | void *obfd; | |
1327 | }; | |
1328 | ||
1329 | /* A callback for linux_find_memory_regions that converts between the | |
1330 | "full"-style callback and find_memory_region_ftype. */ | |
1331 | ||
1332 | static int | |
1333 | linux_find_memory_regions_thunk (ULONGEST vaddr, ULONGEST size, | |
1334 | ULONGEST offset, ULONGEST inode, | |
1335 | int read, int write, int exec, int modified, | |
1336 | const char *filename, void *arg) | |
1337 | { | |
9a3c8263 SM |
1338 | struct linux_find_memory_regions_data *data |
1339 | = (struct linux_find_memory_regions_data *) arg; | |
db1ff28b JK |
1340 | |
1341 | return data->func (vaddr, size, read, write, exec, modified, data->obfd); | |
451b7c33 TT |
1342 | } |
1343 | ||
1344 | /* A variant of linux_find_memory_regions_full that is suitable as the | |
1345 | gdbarch find_memory_regions method. */ | |
1346 | ||
1347 | static int | |
1348 | linux_find_memory_regions (struct gdbarch *gdbarch, | |
db1ff28b | 1349 | find_memory_region_ftype func, void *obfd) |
451b7c33 TT |
1350 | { |
1351 | struct linux_find_memory_regions_data data; | |
1352 | ||
1353 | data.func = func; | |
db1ff28b | 1354 | data.obfd = obfd; |
451b7c33 | 1355 | |
db1ff28b JK |
1356 | return linux_find_memory_regions_full (gdbarch, |
1357 | linux_find_memory_regions_thunk, | |
1358 | &data); | |
451b7c33 TT |
1359 | } |
1360 | ||
6432734d UW |
1361 | /* Determine which signal stopped execution. */ |
1362 | ||
1363 | static int | |
1364 | find_signalled_thread (struct thread_info *info, void *data) | |
1365 | { | |
a493e3e2 | 1366 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
6432734d UW |
1367 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
1368 | return 1; | |
1369 | ||
1370 | return 0; | |
1371 | } | |
1372 | ||
6432734d UW |
1373 | /* Generate corefile notes for SPU contexts. */ |
1374 | ||
1375 | static char * | |
1376 | linux_spu_make_corefile_notes (bfd *obfd, char *note_data, int *note_size) | |
1377 | { | |
1378 | static const char *spu_files[] = | |
1379 | { | |
1380 | "object-id", | |
1381 | "mem", | |
1382 | "regs", | |
1383 | "fpcr", | |
1384 | "lslr", | |
1385 | "decr", | |
1386 | "decr_status", | |
1387 | "signal1", | |
1388 | "signal1_type", | |
1389 | "signal2", | |
1390 | "signal2_type", | |
1391 | "event_mask", | |
1392 | "event_status", | |
1393 | "mbox_info", | |
1394 | "ibox_info", | |
1395 | "wbox_info", | |
1396 | "dma_info", | |
1397 | "proxydma_info", | |
1398 | }; | |
1399 | ||
f5656ead | 1400 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
6432734d UW |
1401 | gdb_byte *spu_ids; |
1402 | LONGEST i, j, size; | |
1403 | ||
1404 | /* Determine list of SPU ids. */ | |
1405 | size = target_read_alloc (¤t_target, TARGET_OBJECT_SPU, | |
1406 | NULL, &spu_ids); | |
1407 | ||
1408 | /* Generate corefile notes for each SPU file. */ | |
1409 | for (i = 0; i < size; i += 4) | |
1410 | { | |
1411 | int fd = extract_unsigned_integer (spu_ids + i, 4, byte_order); | |
1412 | ||
1413 | for (j = 0; j < sizeof (spu_files) / sizeof (spu_files[0]); j++) | |
1414 | { | |
1415 | char annex[32], note_name[32]; | |
1416 | gdb_byte *spu_data; | |
1417 | LONGEST spu_len; | |
1418 | ||
1419 | xsnprintf (annex, sizeof annex, "%d/%s", fd, spu_files[j]); | |
1420 | spu_len = target_read_alloc (¤t_target, TARGET_OBJECT_SPU, | |
1421 | annex, &spu_data); | |
1422 | if (spu_len > 0) | |
1423 | { | |
1424 | xsnprintf (note_name, sizeof note_name, "SPU/%s", annex); | |
1425 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
1426 | note_name, NT_SPU, | |
1427 | spu_data, spu_len); | |
1428 | xfree (spu_data); | |
1429 | ||
1430 | if (!note_data) | |
1431 | { | |
1432 | xfree (spu_ids); | |
1433 | return NULL; | |
1434 | } | |
1435 | } | |
1436 | } | |
1437 | } | |
1438 | ||
1439 | if (size > 0) | |
1440 | xfree (spu_ids); | |
1441 | ||
1442 | return note_data; | |
1443 | } | |
1444 | ||
451b7c33 TT |
1445 | /* This is used to pass information from |
1446 | linux_make_mappings_corefile_notes through | |
1447 | linux_find_memory_regions_full. */ | |
1448 | ||
1449 | struct linux_make_mappings_data | |
1450 | { | |
1451 | /* Number of files mapped. */ | |
1452 | ULONGEST file_count; | |
1453 | ||
1454 | /* The obstack for the main part of the data. */ | |
1455 | struct obstack *data_obstack; | |
1456 | ||
1457 | /* The filename obstack. */ | |
1458 | struct obstack *filename_obstack; | |
1459 | ||
1460 | /* The architecture's "long" type. */ | |
1461 | struct type *long_type; | |
1462 | }; | |
1463 | ||
1464 | static linux_find_memory_region_ftype linux_make_mappings_callback; | |
1465 | ||
1466 | /* A callback for linux_find_memory_regions_full that updates the | |
1467 | mappings data for linux_make_mappings_corefile_notes. */ | |
1468 | ||
1469 | static int | |
1470 | linux_make_mappings_callback (ULONGEST vaddr, ULONGEST size, | |
1471 | ULONGEST offset, ULONGEST inode, | |
1472 | int read, int write, int exec, int modified, | |
1473 | const char *filename, void *data) | |
1474 | { | |
9a3c8263 SM |
1475 | struct linux_make_mappings_data *map_data |
1476 | = (struct linux_make_mappings_data *) data; | |
451b7c33 TT |
1477 | gdb_byte buf[sizeof (ULONGEST)]; |
1478 | ||
1479 | if (*filename == '\0' || inode == 0) | |
1480 | return 0; | |
1481 | ||
1482 | ++map_data->file_count; | |
1483 | ||
1484 | pack_long (buf, map_data->long_type, vaddr); | |
1485 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1486 | pack_long (buf, map_data->long_type, vaddr + size); | |
1487 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1488 | pack_long (buf, map_data->long_type, offset); | |
1489 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1490 | ||
1491 | obstack_grow_str0 (map_data->filename_obstack, filename); | |
1492 | ||
1493 | return 0; | |
1494 | } | |
1495 | ||
1496 | /* Write the file mapping data to the core file, if possible. OBFD is | |
1497 | the output BFD. NOTE_DATA is the current note data, and NOTE_SIZE | |
1498 | is a pointer to the note size. Returns the new NOTE_DATA and | |
1499 | updates NOTE_SIZE. */ | |
1500 | ||
1501 | static char * | |
1502 | linux_make_mappings_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, | |
1503 | char *note_data, int *note_size) | |
1504 | { | |
1505 | struct cleanup *cleanup; | |
1506 | struct obstack data_obstack, filename_obstack; | |
1507 | struct linux_make_mappings_data mapping_data; | |
1508 | struct type *long_type | |
1509 | = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), 0, "long"); | |
1510 | gdb_byte buf[sizeof (ULONGEST)]; | |
1511 | ||
1512 | obstack_init (&data_obstack); | |
1513 | cleanup = make_cleanup_obstack_free (&data_obstack); | |
1514 | obstack_init (&filename_obstack); | |
1515 | make_cleanup_obstack_free (&filename_obstack); | |
1516 | ||
1517 | mapping_data.file_count = 0; | |
1518 | mapping_data.data_obstack = &data_obstack; | |
1519 | mapping_data.filename_obstack = &filename_obstack; | |
1520 | mapping_data.long_type = long_type; | |
1521 | ||
1522 | /* Reserve space for the count. */ | |
1523 | obstack_blank (&data_obstack, TYPE_LENGTH (long_type)); | |
1524 | /* We always write the page size as 1 since we have no good way to | |
1525 | determine the correct value. */ | |
1526 | pack_long (buf, long_type, 1); | |
1527 | obstack_grow (&data_obstack, buf, TYPE_LENGTH (long_type)); | |
1528 | ||
db1ff28b JK |
1529 | linux_find_memory_regions_full (gdbarch, linux_make_mappings_callback, |
1530 | &mapping_data); | |
451b7c33 TT |
1531 | |
1532 | if (mapping_data.file_count != 0) | |
1533 | { | |
1534 | /* Write the count to the obstack. */ | |
51a5cd90 PA |
1535 | pack_long ((gdb_byte *) obstack_base (&data_obstack), |
1536 | long_type, mapping_data.file_count); | |
451b7c33 TT |
1537 | |
1538 | /* Copy the filenames to the data obstack. */ | |
1539 | obstack_grow (&data_obstack, obstack_base (&filename_obstack), | |
1540 | obstack_object_size (&filename_obstack)); | |
1541 | ||
1542 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
1543 | "CORE", NT_FILE, | |
1544 | obstack_base (&data_obstack), | |
1545 | obstack_object_size (&data_obstack)); | |
1546 | } | |
1547 | ||
1548 | do_cleanups (cleanup); | |
1549 | return note_data; | |
1550 | } | |
1551 | ||
5aa82d05 AA |
1552 | /* Structure for passing information from |
1553 | linux_collect_thread_registers via an iterator to | |
1554 | linux_collect_regset_section_cb. */ | |
1555 | ||
1556 | struct linux_collect_regset_section_cb_data | |
1557 | { | |
1558 | struct gdbarch *gdbarch; | |
1559 | const struct regcache *regcache; | |
1560 | bfd *obfd; | |
1561 | char *note_data; | |
1562 | int *note_size; | |
1563 | unsigned long lwp; | |
1564 | enum gdb_signal stop_signal; | |
1565 | int abort_iteration; | |
1566 | }; | |
1567 | ||
1568 | /* Callback for iterate_over_regset_sections that records a single | |
1569 | regset in the corefile note section. */ | |
1570 | ||
1571 | static void | |
1572 | linux_collect_regset_section_cb (const char *sect_name, int size, | |
8f0435f7 | 1573 | const struct regset *regset, |
5aa82d05 AA |
1574 | const char *human_name, void *cb_data) |
1575 | { | |
5aa82d05 | 1576 | char *buf; |
7567e115 SM |
1577 | struct linux_collect_regset_section_cb_data *data |
1578 | = (struct linux_collect_regset_section_cb_data *) cb_data; | |
5aa82d05 AA |
1579 | |
1580 | if (data->abort_iteration) | |
1581 | return; | |
1582 | ||
5aa82d05 AA |
1583 | gdb_assert (regset && regset->collect_regset); |
1584 | ||
224c3ddb | 1585 | buf = (char *) xmalloc (size); |
5aa82d05 AA |
1586 | regset->collect_regset (regset, data->regcache, -1, buf, size); |
1587 | ||
1588 | /* PRSTATUS still needs to be treated specially. */ | |
1589 | if (strcmp (sect_name, ".reg") == 0) | |
1590 | data->note_data = (char *) elfcore_write_prstatus | |
1591 | (data->obfd, data->note_data, data->note_size, data->lwp, | |
1592 | gdb_signal_to_host (data->stop_signal), buf); | |
1593 | else | |
1594 | data->note_data = (char *) elfcore_write_register_note | |
1595 | (data->obfd, data->note_data, data->note_size, | |
1596 | sect_name, buf, size); | |
1597 | xfree (buf); | |
1598 | ||
1599 | if (data->note_data == NULL) | |
1600 | data->abort_iteration = 1; | |
1601 | } | |
1602 | ||
6432734d UW |
1603 | /* Records the thread's register state for the corefile note |
1604 | section. */ | |
1605 | ||
1606 | static char * | |
1607 | linux_collect_thread_registers (const struct regcache *regcache, | |
1608 | ptid_t ptid, bfd *obfd, | |
1609 | char *note_data, int *note_size, | |
2ea28649 | 1610 | enum gdb_signal stop_signal) |
6432734d UW |
1611 | { |
1612 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
5aa82d05 | 1613 | struct linux_collect_regset_section_cb_data data; |
6432734d | 1614 | |
5aa82d05 AA |
1615 | data.gdbarch = gdbarch; |
1616 | data.regcache = regcache; | |
1617 | data.obfd = obfd; | |
1618 | data.note_data = note_data; | |
1619 | data.note_size = note_size; | |
1620 | data.stop_signal = stop_signal; | |
1621 | data.abort_iteration = 0; | |
6432734d UW |
1622 | |
1623 | /* For remote targets the LWP may not be available, so use the TID. */ | |
5aa82d05 AA |
1624 | data.lwp = ptid_get_lwp (ptid); |
1625 | if (!data.lwp) | |
1626 | data.lwp = ptid_get_tid (ptid); | |
1627 | ||
1628 | gdbarch_iterate_over_regset_sections (gdbarch, | |
1629 | linux_collect_regset_section_cb, | |
1630 | &data, regcache); | |
1631 | return data.note_data; | |
6432734d UW |
1632 | } |
1633 | ||
9015683b TT |
1634 | /* Fetch the siginfo data for the current thread, if it exists. If |
1635 | there is no data, or we could not read it, return NULL. Otherwise, | |
1636 | return a newly malloc'd buffer holding the data and fill in *SIZE | |
1637 | with the size of the data. The caller is responsible for freeing | |
1638 | the data. */ | |
1639 | ||
1640 | static gdb_byte * | |
1641 | linux_get_siginfo_data (struct gdbarch *gdbarch, LONGEST *size) | |
1642 | { | |
1643 | struct type *siginfo_type; | |
1644 | gdb_byte *buf; | |
1645 | LONGEST bytes_read; | |
1646 | struct cleanup *cleanups; | |
1647 | ||
1648 | if (!gdbarch_get_siginfo_type_p (gdbarch)) | |
1649 | return NULL; | |
1650 | ||
1651 | siginfo_type = gdbarch_get_siginfo_type (gdbarch); | |
1652 | ||
224c3ddb | 1653 | buf = (gdb_byte *) xmalloc (TYPE_LENGTH (siginfo_type)); |
9015683b TT |
1654 | cleanups = make_cleanup (xfree, buf); |
1655 | ||
1656 | bytes_read = target_read (¤t_target, TARGET_OBJECT_SIGNAL_INFO, NULL, | |
1657 | buf, 0, TYPE_LENGTH (siginfo_type)); | |
1658 | if (bytes_read == TYPE_LENGTH (siginfo_type)) | |
1659 | { | |
1660 | discard_cleanups (cleanups); | |
1661 | *size = bytes_read; | |
1662 | } | |
1663 | else | |
1664 | { | |
1665 | do_cleanups (cleanups); | |
1666 | buf = NULL; | |
1667 | } | |
1668 | ||
1669 | return buf; | |
1670 | } | |
1671 | ||
6432734d UW |
1672 | struct linux_corefile_thread_data |
1673 | { | |
1674 | struct gdbarch *gdbarch; | |
6432734d UW |
1675 | bfd *obfd; |
1676 | char *note_data; | |
1677 | int *note_size; | |
2ea28649 | 1678 | enum gdb_signal stop_signal; |
6432734d UW |
1679 | }; |
1680 | ||
050c224b PA |
1681 | /* Records the thread's register state for the corefile note |
1682 | section. */ | |
6432734d | 1683 | |
050c224b PA |
1684 | static void |
1685 | linux_corefile_thread (struct thread_info *info, | |
1686 | struct linux_corefile_thread_data *args) | |
6432734d | 1687 | { |
050c224b PA |
1688 | struct cleanup *old_chain; |
1689 | struct regcache *regcache; | |
1690 | gdb_byte *siginfo_data; | |
1691 | LONGEST siginfo_size = 0; | |
1692 | ||
1693 | regcache = get_thread_arch_regcache (info->ptid, args->gdbarch); | |
1694 | ||
1695 | old_chain = save_inferior_ptid (); | |
1696 | inferior_ptid = info->ptid; | |
1697 | target_fetch_registers (regcache, -1); | |
1698 | siginfo_data = linux_get_siginfo_data (args->gdbarch, &siginfo_size); | |
1699 | do_cleanups (old_chain); | |
1700 | ||
1701 | old_chain = make_cleanup (xfree, siginfo_data); | |
1702 | ||
1703 | args->note_data = linux_collect_thread_registers | |
1704 | (regcache, info->ptid, args->obfd, args->note_data, | |
1705 | args->note_size, args->stop_signal); | |
1706 | ||
1707 | /* Don't return anything if we got no register information above, | |
1708 | such a core file is useless. */ | |
1709 | if (args->note_data != NULL) | |
1710 | if (siginfo_data != NULL) | |
1711 | args->note_data = elfcore_write_note (args->obfd, | |
1712 | args->note_data, | |
1713 | args->note_size, | |
1714 | "CORE", NT_SIGINFO, | |
1715 | siginfo_data, siginfo_size); | |
1716 | ||
1717 | do_cleanups (old_chain); | |
6432734d UW |
1718 | } |
1719 | ||
b3ac9c77 SDJ |
1720 | /* Fill the PRPSINFO structure with information about the process being |
1721 | debugged. Returns 1 in case of success, 0 for failures. Please note that | |
1722 | even if the structure cannot be entirely filled (e.g., GDB was unable to | |
1723 | gather information about the process UID/GID), this function will still | |
1724 | return 1 since some information was already recorded. It will only return | |
1725 | 0 iff nothing can be gathered. */ | |
1726 | ||
1727 | static int | |
1728 | linux_fill_prpsinfo (struct elf_internal_linux_prpsinfo *p) | |
1729 | { | |
1730 | /* The filename which we will use to obtain some info about the process. | |
1731 | We will basically use this to store the `/proc/PID/FILENAME' file. */ | |
1732 | char filename[100]; | |
1733 | /* The full name of the program which generated the corefile. */ | |
1734 | char *fname; | |
1735 | /* The basename of the executable. */ | |
1736 | const char *basename; | |
1737 | /* The arguments of the program. */ | |
1738 | char *psargs; | |
1739 | char *infargs; | |
1740 | /* The contents of `/proc/PID/stat' and `/proc/PID/status' files. */ | |
1741 | char *proc_stat, *proc_status; | |
1742 | /* Temporary buffer. */ | |
1743 | char *tmpstr; | |
1744 | /* The valid states of a process, according to the Linux kernel. */ | |
1745 | const char valid_states[] = "RSDTZW"; | |
1746 | /* The program state. */ | |
1747 | const char *prog_state; | |
1748 | /* The state of the process. */ | |
1749 | char pr_sname; | |
1750 | /* The PID of the program which generated the corefile. */ | |
1751 | pid_t pid; | |
1752 | /* Process flags. */ | |
1753 | unsigned int pr_flag; | |
1754 | /* Process nice value. */ | |
1755 | long pr_nice; | |
1756 | /* The number of fields read by `sscanf'. */ | |
1757 | int n_fields = 0; | |
1758 | /* Cleanups. */ | |
1759 | struct cleanup *c; | |
1760 | int i; | |
1761 | ||
1762 | gdb_assert (p != NULL); | |
1763 | ||
1764 | /* Obtaining PID and filename. */ | |
1765 | pid = ptid_get_pid (inferior_ptid); | |
1766 | xsnprintf (filename, sizeof (filename), "/proc/%d/cmdline", (int) pid); | |
07c138c8 | 1767 | fname = target_fileio_read_stralloc (NULL, filename); |
b3ac9c77 SDJ |
1768 | |
1769 | if (fname == NULL || *fname == '\0') | |
1770 | { | |
1771 | /* No program name was read, so we won't be able to retrieve more | |
1772 | information about the process. */ | |
1773 | xfree (fname); | |
1774 | return 0; | |
1775 | } | |
1776 | ||
1777 | c = make_cleanup (xfree, fname); | |
1778 | memset (p, 0, sizeof (*p)); | |
1779 | ||
1780 | /* Defining the PID. */ | |
1781 | p->pr_pid = pid; | |
1782 | ||
1783 | /* Copying the program name. Only the basename matters. */ | |
1784 | basename = lbasename (fname); | |
1785 | strncpy (p->pr_fname, basename, sizeof (p->pr_fname)); | |
1786 | p->pr_fname[sizeof (p->pr_fname) - 1] = '\0'; | |
1787 | ||
1788 | infargs = get_inferior_args (); | |
1789 | ||
1790 | psargs = xstrdup (fname); | |
1791 | if (infargs != NULL) | |
1792 | psargs = reconcat (psargs, psargs, " ", infargs, NULL); | |
1793 | ||
1794 | make_cleanup (xfree, psargs); | |
1795 | ||
1796 | strncpy (p->pr_psargs, psargs, sizeof (p->pr_psargs)); | |
1797 | p->pr_psargs[sizeof (p->pr_psargs) - 1] = '\0'; | |
1798 | ||
1799 | xsnprintf (filename, sizeof (filename), "/proc/%d/stat", (int) pid); | |
07c138c8 | 1800 | proc_stat = target_fileio_read_stralloc (NULL, filename); |
b3ac9c77 SDJ |
1801 | make_cleanup (xfree, proc_stat); |
1802 | ||
1803 | if (proc_stat == NULL || *proc_stat == '\0') | |
1804 | { | |
1805 | /* Despite being unable to read more information about the | |
1806 | process, we return 1 here because at least we have its | |
1807 | command line, PID and arguments. */ | |
1808 | do_cleanups (c); | |
1809 | return 1; | |
1810 | } | |
1811 | ||
1812 | /* Ok, we have the stats. It's time to do a little parsing of the | |
1813 | contents of the buffer, so that we end up reading what we want. | |
1814 | ||
1815 | The following parsing mechanism is strongly based on the | |
1816 | information generated by the `fs/proc/array.c' file, present in | |
1817 | the Linux kernel tree. More details about how the information is | |
1818 | displayed can be obtained by seeing the manpage of proc(5), | |
1819 | specifically under the entry of `/proc/[pid]/stat'. */ | |
1820 | ||
1821 | /* Getting rid of the PID, since we already have it. */ | |
1822 | while (isdigit (*proc_stat)) | |
1823 | ++proc_stat; | |
1824 | ||
1825 | proc_stat = skip_spaces (proc_stat); | |
1826 | ||
184cd072 JK |
1827 | /* ps command also relies on no trailing fields ever contain ')'. */ |
1828 | proc_stat = strrchr (proc_stat, ')'); | |
1829 | if (proc_stat == NULL) | |
1830 | { | |
1831 | do_cleanups (c); | |
1832 | return 1; | |
1833 | } | |
1834 | proc_stat++; | |
b3ac9c77 SDJ |
1835 | |
1836 | proc_stat = skip_spaces (proc_stat); | |
1837 | ||
1838 | n_fields = sscanf (proc_stat, | |
1839 | "%c" /* Process state. */ | |
1840 | "%d%d%d" /* Parent PID, group ID, session ID. */ | |
1841 | "%*d%*d" /* tty_nr, tpgid (not used). */ | |
1842 | "%u" /* Flags. */ | |
1843 | "%*s%*s%*s%*s" /* minflt, cminflt, majflt, | |
1844 | cmajflt (not used). */ | |
1845 | "%*s%*s%*s%*s" /* utime, stime, cutime, | |
1846 | cstime (not used). */ | |
1847 | "%*s" /* Priority (not used). */ | |
1848 | "%ld", /* Nice. */ | |
1849 | &pr_sname, | |
1850 | &p->pr_ppid, &p->pr_pgrp, &p->pr_sid, | |
1851 | &pr_flag, | |
1852 | &pr_nice); | |
1853 | ||
1854 | if (n_fields != 6) | |
1855 | { | |
1856 | /* Again, we couldn't read the complementary information about | |
1857 | the process state. However, we already have minimal | |
1858 | information, so we just return 1 here. */ | |
1859 | do_cleanups (c); | |
1860 | return 1; | |
1861 | } | |
1862 | ||
1863 | /* Filling the structure fields. */ | |
1864 | prog_state = strchr (valid_states, pr_sname); | |
1865 | if (prog_state != NULL) | |
1866 | p->pr_state = prog_state - valid_states; | |
1867 | else | |
1868 | { | |
1869 | /* Zero means "Running". */ | |
1870 | p->pr_state = 0; | |
1871 | } | |
1872 | ||
1873 | p->pr_sname = p->pr_state > 5 ? '.' : pr_sname; | |
1874 | p->pr_zomb = p->pr_sname == 'Z'; | |
1875 | p->pr_nice = pr_nice; | |
1876 | p->pr_flag = pr_flag; | |
1877 | ||
1878 | /* Finally, obtaining the UID and GID. For that, we read and parse the | |
1879 | contents of the `/proc/PID/status' file. */ | |
1880 | xsnprintf (filename, sizeof (filename), "/proc/%d/status", (int) pid); | |
07c138c8 | 1881 | proc_status = target_fileio_read_stralloc (NULL, filename); |
b3ac9c77 SDJ |
1882 | make_cleanup (xfree, proc_status); |
1883 | ||
1884 | if (proc_status == NULL || *proc_status == '\0') | |
1885 | { | |
1886 | /* Returning 1 since we already have a bunch of information. */ | |
1887 | do_cleanups (c); | |
1888 | return 1; | |
1889 | } | |
1890 | ||
1891 | /* Extracting the UID. */ | |
1892 | tmpstr = strstr (proc_status, "Uid:"); | |
1893 | if (tmpstr != NULL) | |
1894 | { | |
1895 | /* Advancing the pointer to the beginning of the UID. */ | |
1896 | tmpstr += sizeof ("Uid:"); | |
1897 | while (*tmpstr != '\0' && !isdigit (*tmpstr)) | |
1898 | ++tmpstr; | |
1899 | ||
1900 | if (isdigit (*tmpstr)) | |
1901 | p->pr_uid = strtol (tmpstr, &tmpstr, 10); | |
1902 | } | |
1903 | ||
1904 | /* Extracting the GID. */ | |
1905 | tmpstr = strstr (proc_status, "Gid:"); | |
1906 | if (tmpstr != NULL) | |
1907 | { | |
1908 | /* Advancing the pointer to the beginning of the GID. */ | |
1909 | tmpstr += sizeof ("Gid:"); | |
1910 | while (*tmpstr != '\0' && !isdigit (*tmpstr)) | |
1911 | ++tmpstr; | |
1912 | ||
1913 | if (isdigit (*tmpstr)) | |
1914 | p->pr_gid = strtol (tmpstr, &tmpstr, 10); | |
1915 | } | |
1916 | ||
1917 | do_cleanups (c); | |
1918 | ||
1919 | return 1; | |
1920 | } | |
1921 | ||
f968fe80 AA |
1922 | /* Build the note section for a corefile, and return it in a malloc |
1923 | buffer. */ | |
6432734d | 1924 | |
f968fe80 AA |
1925 | static char * |
1926 | linux_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size) | |
6432734d UW |
1927 | { |
1928 | struct linux_corefile_thread_data thread_args; | |
b3ac9c77 | 1929 | struct elf_internal_linux_prpsinfo prpsinfo; |
6432734d UW |
1930 | char *note_data = NULL; |
1931 | gdb_byte *auxv; | |
1932 | int auxv_len; | |
050c224b | 1933 | struct thread_info *curr_thr, *signalled_thr, *thr; |
6432734d | 1934 | |
f968fe80 AA |
1935 | if (! gdbarch_iterate_over_regset_sections_p (gdbarch)) |
1936 | return NULL; | |
1937 | ||
b3ac9c77 | 1938 | if (linux_fill_prpsinfo (&prpsinfo)) |
6432734d | 1939 | { |
b3ac9c77 SDJ |
1940 | if (gdbarch_elfcore_write_linux_prpsinfo_p (gdbarch)) |
1941 | { | |
1942 | note_data = gdbarch_elfcore_write_linux_prpsinfo (gdbarch, obfd, | |
1943 | note_data, note_size, | |
1944 | &prpsinfo); | |
1945 | } | |
1946 | else | |
1947 | { | |
1948 | if (gdbarch_ptr_bit (gdbarch) == 64) | |
1949 | note_data = elfcore_write_linux_prpsinfo64 (obfd, | |
1950 | note_data, note_size, | |
1951 | &prpsinfo); | |
1952 | else | |
1953 | note_data = elfcore_write_linux_prpsinfo32 (obfd, | |
1954 | note_data, note_size, | |
1955 | &prpsinfo); | |
1956 | } | |
6432734d UW |
1957 | } |
1958 | ||
1959 | /* Thread register information. */ | |
492d29ea | 1960 | TRY |
22fd09ae JK |
1961 | { |
1962 | update_thread_list (); | |
1963 | } | |
492d29ea PA |
1964 | CATCH (e, RETURN_MASK_ERROR) |
1965 | { | |
1966 | exception_print (gdb_stderr, e); | |
1967 | } | |
1968 | END_CATCH | |
1969 | ||
050c224b PA |
1970 | /* Like the kernel, prefer dumping the signalled thread first. |
1971 | "First thread" is what tools use to infer the signalled thread. | |
1972 | In case there's more than one signalled thread, prefer the | |
1973 | current thread, if it is signalled. */ | |
1974 | curr_thr = inferior_thread (); | |
1975 | if (curr_thr->suspend.stop_signal != GDB_SIGNAL_0) | |
1976 | signalled_thr = curr_thr; | |
1977 | else | |
1978 | { | |
1979 | signalled_thr = iterate_over_threads (find_signalled_thread, NULL); | |
1980 | if (signalled_thr == NULL) | |
1981 | signalled_thr = curr_thr; | |
1982 | } | |
1983 | ||
6432734d | 1984 | thread_args.gdbarch = gdbarch; |
6432734d UW |
1985 | thread_args.obfd = obfd; |
1986 | thread_args.note_data = note_data; | |
1987 | thread_args.note_size = note_size; | |
050c224b PA |
1988 | thread_args.stop_signal = signalled_thr->suspend.stop_signal; |
1989 | ||
1990 | linux_corefile_thread (signalled_thr, &thread_args); | |
1991 | ALL_NON_EXITED_THREADS (thr) | |
1992 | { | |
1993 | if (thr == signalled_thr) | |
1994 | continue; | |
1995 | if (ptid_get_pid (thr->ptid) != ptid_get_pid (inferior_ptid)) | |
1996 | continue; | |
1997 | ||
1998 | linux_corefile_thread (thr, &thread_args); | |
1999 | } | |
2000 | ||
6432734d UW |
2001 | note_data = thread_args.note_data; |
2002 | if (!note_data) | |
2003 | return NULL; | |
2004 | ||
2005 | /* Auxillary vector. */ | |
2006 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, | |
2007 | NULL, &auxv); | |
2008 | if (auxv_len > 0) | |
2009 | { | |
2010 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
2011 | "CORE", NT_AUXV, auxv, auxv_len); | |
2012 | xfree (auxv); | |
2013 | ||
2014 | if (!note_data) | |
2015 | return NULL; | |
2016 | } | |
2017 | ||
2018 | /* SPU information. */ | |
2019 | note_data = linux_spu_make_corefile_notes (obfd, note_data, note_size); | |
2020 | if (!note_data) | |
2021 | return NULL; | |
2022 | ||
451b7c33 TT |
2023 | /* File mappings. */ |
2024 | note_data = linux_make_mappings_corefile_notes (gdbarch, obfd, | |
2025 | note_data, note_size); | |
2026 | ||
6432734d UW |
2027 | return note_data; |
2028 | } | |
2029 | ||
eb14d406 SDJ |
2030 | /* Implementation of `gdbarch_gdb_signal_from_target', as defined in |
2031 | gdbarch.h. This function is not static because it is exported to | |
2032 | other -tdep files. */ | |
2033 | ||
2034 | enum gdb_signal | |
2035 | linux_gdb_signal_from_target (struct gdbarch *gdbarch, int signal) | |
2036 | { | |
2037 | switch (signal) | |
2038 | { | |
2039 | case 0: | |
2040 | return GDB_SIGNAL_0; | |
2041 | ||
2042 | case LINUX_SIGHUP: | |
2043 | return GDB_SIGNAL_HUP; | |
2044 | ||
2045 | case LINUX_SIGINT: | |
2046 | return GDB_SIGNAL_INT; | |
2047 | ||
2048 | case LINUX_SIGQUIT: | |
2049 | return GDB_SIGNAL_QUIT; | |
2050 | ||
2051 | case LINUX_SIGILL: | |
2052 | return GDB_SIGNAL_ILL; | |
2053 | ||
2054 | case LINUX_SIGTRAP: | |
2055 | return GDB_SIGNAL_TRAP; | |
2056 | ||
2057 | case LINUX_SIGABRT: | |
2058 | return GDB_SIGNAL_ABRT; | |
2059 | ||
2060 | case LINUX_SIGBUS: | |
2061 | return GDB_SIGNAL_BUS; | |
2062 | ||
2063 | case LINUX_SIGFPE: | |
2064 | return GDB_SIGNAL_FPE; | |
2065 | ||
2066 | case LINUX_SIGKILL: | |
2067 | return GDB_SIGNAL_KILL; | |
2068 | ||
2069 | case LINUX_SIGUSR1: | |
2070 | return GDB_SIGNAL_USR1; | |
2071 | ||
2072 | case LINUX_SIGSEGV: | |
2073 | return GDB_SIGNAL_SEGV; | |
2074 | ||
2075 | case LINUX_SIGUSR2: | |
2076 | return GDB_SIGNAL_USR2; | |
2077 | ||
2078 | case LINUX_SIGPIPE: | |
2079 | return GDB_SIGNAL_PIPE; | |
2080 | ||
2081 | case LINUX_SIGALRM: | |
2082 | return GDB_SIGNAL_ALRM; | |
2083 | ||
2084 | case LINUX_SIGTERM: | |
2085 | return GDB_SIGNAL_TERM; | |
2086 | ||
2087 | case LINUX_SIGCHLD: | |
2088 | return GDB_SIGNAL_CHLD; | |
2089 | ||
2090 | case LINUX_SIGCONT: | |
2091 | return GDB_SIGNAL_CONT; | |
2092 | ||
2093 | case LINUX_SIGSTOP: | |
2094 | return GDB_SIGNAL_STOP; | |
2095 | ||
2096 | case LINUX_SIGTSTP: | |
2097 | return GDB_SIGNAL_TSTP; | |
2098 | ||
2099 | case LINUX_SIGTTIN: | |
2100 | return GDB_SIGNAL_TTIN; | |
2101 | ||
2102 | case LINUX_SIGTTOU: | |
2103 | return GDB_SIGNAL_TTOU; | |
2104 | ||
2105 | case LINUX_SIGURG: | |
2106 | return GDB_SIGNAL_URG; | |
2107 | ||
2108 | case LINUX_SIGXCPU: | |
2109 | return GDB_SIGNAL_XCPU; | |
2110 | ||
2111 | case LINUX_SIGXFSZ: | |
2112 | return GDB_SIGNAL_XFSZ; | |
2113 | ||
2114 | case LINUX_SIGVTALRM: | |
2115 | return GDB_SIGNAL_VTALRM; | |
2116 | ||
2117 | case LINUX_SIGPROF: | |
2118 | return GDB_SIGNAL_PROF; | |
2119 | ||
2120 | case LINUX_SIGWINCH: | |
2121 | return GDB_SIGNAL_WINCH; | |
2122 | ||
2123 | /* No way to differentiate between SIGIO and SIGPOLL. | |
2124 | Therefore, we just handle the first one. */ | |
2125 | case LINUX_SIGIO: | |
2126 | return GDB_SIGNAL_IO; | |
2127 | ||
2128 | case LINUX_SIGPWR: | |
2129 | return GDB_SIGNAL_PWR; | |
2130 | ||
2131 | case LINUX_SIGSYS: | |
2132 | return GDB_SIGNAL_SYS; | |
2133 | ||
2134 | /* SIGRTMIN and SIGRTMAX are not continuous in <gdb/signals.def>, | |
2135 | therefore we have to handle them here. */ | |
2136 | case LINUX_SIGRTMIN: | |
2137 | return GDB_SIGNAL_REALTIME_32; | |
2138 | ||
2139 | case LINUX_SIGRTMAX: | |
2140 | return GDB_SIGNAL_REALTIME_64; | |
2141 | } | |
2142 | ||
2143 | if (signal >= LINUX_SIGRTMIN + 1 && signal <= LINUX_SIGRTMAX - 1) | |
2144 | { | |
2145 | int offset = signal - LINUX_SIGRTMIN + 1; | |
2146 | ||
2147 | return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_33 + offset); | |
2148 | } | |
2149 | ||
2150 | return GDB_SIGNAL_UNKNOWN; | |
2151 | } | |
2152 | ||
2153 | /* Implementation of `gdbarch_gdb_signal_to_target', as defined in | |
2154 | gdbarch.h. This function is not static because it is exported to | |
2155 | other -tdep files. */ | |
2156 | ||
2157 | int | |
2158 | linux_gdb_signal_to_target (struct gdbarch *gdbarch, | |
2159 | enum gdb_signal signal) | |
2160 | { | |
2161 | switch (signal) | |
2162 | { | |
2163 | case GDB_SIGNAL_0: | |
2164 | return 0; | |
2165 | ||
2166 | case GDB_SIGNAL_HUP: | |
2167 | return LINUX_SIGHUP; | |
2168 | ||
2169 | case GDB_SIGNAL_INT: | |
2170 | return LINUX_SIGINT; | |
2171 | ||
2172 | case GDB_SIGNAL_QUIT: | |
2173 | return LINUX_SIGQUIT; | |
2174 | ||
2175 | case GDB_SIGNAL_ILL: | |
2176 | return LINUX_SIGILL; | |
2177 | ||
2178 | case GDB_SIGNAL_TRAP: | |
2179 | return LINUX_SIGTRAP; | |
2180 | ||
2181 | case GDB_SIGNAL_ABRT: | |
2182 | return LINUX_SIGABRT; | |
2183 | ||
2184 | case GDB_SIGNAL_FPE: | |
2185 | return LINUX_SIGFPE; | |
2186 | ||
2187 | case GDB_SIGNAL_KILL: | |
2188 | return LINUX_SIGKILL; | |
2189 | ||
2190 | case GDB_SIGNAL_BUS: | |
2191 | return LINUX_SIGBUS; | |
2192 | ||
2193 | case GDB_SIGNAL_SEGV: | |
2194 | return LINUX_SIGSEGV; | |
2195 | ||
2196 | case GDB_SIGNAL_SYS: | |
2197 | return LINUX_SIGSYS; | |
2198 | ||
2199 | case GDB_SIGNAL_PIPE: | |
2200 | return LINUX_SIGPIPE; | |
2201 | ||
2202 | case GDB_SIGNAL_ALRM: | |
2203 | return LINUX_SIGALRM; | |
2204 | ||
2205 | case GDB_SIGNAL_TERM: | |
2206 | return LINUX_SIGTERM; | |
2207 | ||
2208 | case GDB_SIGNAL_URG: | |
2209 | return LINUX_SIGURG; | |
2210 | ||
2211 | case GDB_SIGNAL_STOP: | |
2212 | return LINUX_SIGSTOP; | |
2213 | ||
2214 | case GDB_SIGNAL_TSTP: | |
2215 | return LINUX_SIGTSTP; | |
2216 | ||
2217 | case GDB_SIGNAL_CONT: | |
2218 | return LINUX_SIGCONT; | |
2219 | ||
2220 | case GDB_SIGNAL_CHLD: | |
2221 | return LINUX_SIGCHLD; | |
2222 | ||
2223 | case GDB_SIGNAL_TTIN: | |
2224 | return LINUX_SIGTTIN; | |
2225 | ||
2226 | case GDB_SIGNAL_TTOU: | |
2227 | return LINUX_SIGTTOU; | |
2228 | ||
2229 | case GDB_SIGNAL_IO: | |
2230 | return LINUX_SIGIO; | |
2231 | ||
2232 | case GDB_SIGNAL_XCPU: | |
2233 | return LINUX_SIGXCPU; | |
2234 | ||
2235 | case GDB_SIGNAL_XFSZ: | |
2236 | return LINUX_SIGXFSZ; | |
2237 | ||
2238 | case GDB_SIGNAL_VTALRM: | |
2239 | return LINUX_SIGVTALRM; | |
2240 | ||
2241 | case GDB_SIGNAL_PROF: | |
2242 | return LINUX_SIGPROF; | |
2243 | ||
2244 | case GDB_SIGNAL_WINCH: | |
2245 | return LINUX_SIGWINCH; | |
2246 | ||
2247 | case GDB_SIGNAL_USR1: | |
2248 | return LINUX_SIGUSR1; | |
2249 | ||
2250 | case GDB_SIGNAL_USR2: | |
2251 | return LINUX_SIGUSR2; | |
2252 | ||
2253 | case GDB_SIGNAL_PWR: | |
2254 | return LINUX_SIGPWR; | |
2255 | ||
2256 | case GDB_SIGNAL_POLL: | |
2257 | return LINUX_SIGPOLL; | |
2258 | ||
2259 | /* GDB_SIGNAL_REALTIME_32 is not continuous in <gdb/signals.def>, | |
2260 | therefore we have to handle it here. */ | |
2261 | case GDB_SIGNAL_REALTIME_32: | |
2262 | return LINUX_SIGRTMIN; | |
2263 | ||
2264 | /* Same comment applies to _64. */ | |
2265 | case GDB_SIGNAL_REALTIME_64: | |
2266 | return LINUX_SIGRTMAX; | |
2267 | } | |
2268 | ||
2269 | /* GDB_SIGNAL_REALTIME_33 to _64 are continuous. */ | |
2270 | if (signal >= GDB_SIGNAL_REALTIME_33 | |
2271 | && signal <= GDB_SIGNAL_REALTIME_63) | |
2272 | { | |
2273 | int offset = signal - GDB_SIGNAL_REALTIME_33; | |
2274 | ||
2275 | return LINUX_SIGRTMIN + 1 + offset; | |
2276 | } | |
2277 | ||
2278 | return -1; | |
2279 | } | |
2280 | ||
3437254d PA |
2281 | /* Rummage through mappings to find a mapping's size. */ |
2282 | ||
2283 | static int | |
2284 | find_mapping_size (CORE_ADDR vaddr, unsigned long size, | |
2285 | int read, int write, int exec, int modified, | |
2286 | void *data) | |
2287 | { | |
9a3c8263 | 2288 | struct mem_range *range = (struct mem_range *) data; |
3437254d PA |
2289 | |
2290 | if (vaddr == range->start) | |
2291 | { | |
2292 | range->length = size; | |
2293 | return 1; | |
2294 | } | |
2295 | return 0; | |
2296 | } | |
2297 | ||
cdfa0b0a PA |
2298 | /* Helper for linux_vsyscall_range that does the real work of finding |
2299 | the vsyscall's address range. */ | |
3437254d PA |
2300 | |
2301 | static int | |
cdfa0b0a | 2302 | linux_vsyscall_range_raw (struct gdbarch *gdbarch, struct mem_range *range) |
3437254d PA |
2303 | { |
2304 | if (target_auxv_search (¤t_target, AT_SYSINFO_EHDR, &range->start) <= 0) | |
2305 | return 0; | |
2306 | ||
2307 | /* This is installed by linux_init_abi below, so should always be | |
2308 | available. */ | |
2309 | gdb_assert (gdbarch_find_memory_regions_p (target_gdbarch ())); | |
2310 | ||
2311 | range->length = 0; | |
2312 | gdbarch_find_memory_regions (gdbarch, find_mapping_size, range); | |
2313 | return 1; | |
2314 | } | |
2315 | ||
cdfa0b0a PA |
2316 | /* Implementation of the "vsyscall_range" gdbarch hook. Handles |
2317 | caching, and defers the real work to linux_vsyscall_range_raw. */ | |
2318 | ||
2319 | static int | |
2320 | linux_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range) | |
2321 | { | |
2322 | struct linux_info *info = get_linux_inferior_data (); | |
2323 | ||
2324 | if (info->vsyscall_range_p == 0) | |
2325 | { | |
2326 | if (linux_vsyscall_range_raw (gdbarch, &info->vsyscall_range)) | |
2327 | info->vsyscall_range_p = 1; | |
2328 | else | |
2329 | info->vsyscall_range_p = -1; | |
2330 | } | |
2331 | ||
2332 | if (info->vsyscall_range_p < 0) | |
2333 | return 0; | |
2334 | ||
2335 | *range = info->vsyscall_range; | |
2336 | return 1; | |
2337 | } | |
2338 | ||
3bc3cebe JK |
2339 | /* Symbols for linux_infcall_mmap's ARG_FLAGS; their Linux MAP_* system |
2340 | definitions would be dependent on compilation host. */ | |
2341 | #define GDB_MMAP_MAP_PRIVATE 0x02 /* Changes are private. */ | |
2342 | #define GDB_MMAP_MAP_ANONYMOUS 0x20 /* Don't use a file. */ | |
2343 | ||
2344 | /* See gdbarch.sh 'infcall_mmap'. */ | |
2345 | ||
2346 | static CORE_ADDR | |
2347 | linux_infcall_mmap (CORE_ADDR size, unsigned prot) | |
2348 | { | |
2349 | struct objfile *objf; | |
2350 | /* Do there still exist any Linux systems without "mmap64"? | |
2351 | "mmap" uses 64-bit off_t on x86_64 and 32-bit off_t on i386 and x32. */ | |
2352 | struct value *mmap_val = find_function_in_inferior ("mmap64", &objf); | |
2353 | struct value *addr_val; | |
2354 | struct gdbarch *gdbarch = get_objfile_arch (objf); | |
2355 | CORE_ADDR retval; | |
2356 | enum | |
2357 | { | |
2a546367 | 2358 | ARG_ADDR, ARG_LENGTH, ARG_PROT, ARG_FLAGS, ARG_FD, ARG_OFFSET, ARG_LAST |
3bc3cebe | 2359 | }; |
2a546367 | 2360 | struct value *arg[ARG_LAST]; |
3bc3cebe JK |
2361 | |
2362 | arg[ARG_ADDR] = value_from_pointer (builtin_type (gdbarch)->builtin_data_ptr, | |
2363 | 0); | |
2364 | /* Assuming sizeof (unsigned long) == sizeof (size_t). */ | |
2365 | arg[ARG_LENGTH] = value_from_ulongest | |
2366 | (builtin_type (gdbarch)->builtin_unsigned_long, size); | |
2367 | gdb_assert ((prot & ~(GDB_MMAP_PROT_READ | GDB_MMAP_PROT_WRITE | |
2368 | | GDB_MMAP_PROT_EXEC)) | |
2369 | == 0); | |
2370 | arg[ARG_PROT] = value_from_longest (builtin_type (gdbarch)->builtin_int, prot); | |
2371 | arg[ARG_FLAGS] = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
2372 | GDB_MMAP_MAP_PRIVATE | |
2373 | | GDB_MMAP_MAP_ANONYMOUS); | |
2374 | arg[ARG_FD] = value_from_longest (builtin_type (gdbarch)->builtin_int, -1); | |
2375 | arg[ARG_OFFSET] = value_from_longest (builtin_type (gdbarch)->builtin_int64, | |
2376 | 0); | |
2a546367 | 2377 | addr_val = call_function_by_hand (mmap_val, ARG_LAST, arg); |
3bc3cebe JK |
2378 | retval = value_as_address (addr_val); |
2379 | if (retval == (CORE_ADDR) -1) | |
2380 | error (_("Failed inferior mmap call for %s bytes, errno is changed."), | |
2381 | pulongest (size)); | |
2382 | return retval; | |
2383 | } | |
2384 | ||
7f361056 JK |
2385 | /* See gdbarch.sh 'infcall_munmap'. */ |
2386 | ||
2387 | static void | |
2388 | linux_infcall_munmap (CORE_ADDR addr, CORE_ADDR size) | |
2389 | { | |
2390 | struct objfile *objf; | |
2391 | struct value *munmap_val = find_function_in_inferior ("munmap", &objf); | |
2392 | struct value *retval_val; | |
2393 | struct gdbarch *gdbarch = get_objfile_arch (objf); | |
2394 | LONGEST retval; | |
2395 | enum | |
2396 | { | |
2397 | ARG_ADDR, ARG_LENGTH, ARG_LAST | |
2398 | }; | |
2399 | struct value *arg[ARG_LAST]; | |
2400 | ||
2401 | arg[ARG_ADDR] = value_from_pointer (builtin_type (gdbarch)->builtin_data_ptr, | |
2402 | addr); | |
2403 | /* Assuming sizeof (unsigned long) == sizeof (size_t). */ | |
2404 | arg[ARG_LENGTH] = value_from_ulongest | |
2405 | (builtin_type (gdbarch)->builtin_unsigned_long, size); | |
2406 | retval_val = call_function_by_hand (munmap_val, ARG_LAST, arg); | |
2407 | retval = value_as_long (retval_val); | |
2408 | if (retval != 0) | |
2409 | warning (_("Failed inferior munmap call at %s for %s bytes, " | |
2410 | "errno is changed."), | |
2411 | hex_string (addr), pulongest (size)); | |
2412 | } | |
2413 | ||
906d60cf PA |
2414 | /* See linux-tdep.h. */ |
2415 | ||
2416 | CORE_ADDR | |
2417 | linux_displaced_step_location (struct gdbarch *gdbarch) | |
2418 | { | |
2419 | CORE_ADDR addr; | |
2420 | int bp_len; | |
2421 | ||
2422 | /* Determine entry point from target auxiliary vector. This avoids | |
2423 | the need for symbols. Also, when debugging a stand-alone SPU | |
2424 | executable, entry_point_address () will point to an SPU | |
2425 | local-store address and is thus not usable as displaced stepping | |
2426 | location. The auxiliary vector gets us the PowerPC-side entry | |
2427 | point address instead. */ | |
2428 | if (target_auxv_search (¤t_target, AT_ENTRY, &addr) <= 0) | |
2429 | error (_("Cannot find AT_ENTRY auxiliary vector entry.")); | |
2430 | ||
2431 | /* Make certain that the address points at real code, and not a | |
2432 | function descriptor. */ | |
2433 | addr = gdbarch_convert_from_func_ptr_addr (gdbarch, addr, | |
2434 | ¤t_target); | |
2435 | ||
2436 | /* Inferior calls also use the entry point as a breakpoint location. | |
2437 | We don't want displaced stepping to interfere with those | |
2438 | breakpoints, so leave space. */ | |
2439 | gdbarch_breakpoint_from_pc (gdbarch, &addr, &bp_len); | |
2440 | addr += bp_len * 2; | |
2441 | ||
2442 | return addr; | |
2443 | } | |
2444 | ||
df8411da SDJ |
2445 | /* Display whether the gcore command is using the |
2446 | /proc/PID/coredump_filter file. */ | |
2447 | ||
2448 | static void | |
2449 | show_use_coredump_filter (struct ui_file *file, int from_tty, | |
2450 | struct cmd_list_element *c, const char *value) | |
2451 | { | |
2452 | fprintf_filtered (file, _("Use of /proc/PID/coredump_filter file to generate" | |
2453 | " corefiles is %s.\n"), value); | |
2454 | } | |
2455 | ||
a5ee0f0c PA |
2456 | /* To be called from the various GDB_OSABI_LINUX handlers for the |
2457 | various GNU/Linux architectures and machine types. */ | |
2458 | ||
2459 | void | |
2460 | linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
2461 | { | |
2462 | set_gdbarch_core_pid_to_str (gdbarch, linux_core_pid_to_str); | |
3030c96e | 2463 | set_gdbarch_info_proc (gdbarch, linux_info_proc); |
451b7c33 | 2464 | set_gdbarch_core_info_proc (gdbarch, linux_core_info_proc); |
35c2fab7 | 2465 | set_gdbarch_find_memory_regions (gdbarch, linux_find_memory_regions); |
f968fe80 | 2466 | set_gdbarch_make_corefile_notes (gdbarch, linux_make_corefile_notes); |
33fbcbee PA |
2467 | set_gdbarch_has_shared_address_space (gdbarch, |
2468 | linux_has_shared_address_space); | |
eb14d406 SDJ |
2469 | set_gdbarch_gdb_signal_from_target (gdbarch, |
2470 | linux_gdb_signal_from_target); | |
2471 | set_gdbarch_gdb_signal_to_target (gdbarch, | |
2472 | linux_gdb_signal_to_target); | |
3437254d | 2473 | set_gdbarch_vsyscall_range (gdbarch, linux_vsyscall_range); |
3bc3cebe | 2474 | set_gdbarch_infcall_mmap (gdbarch, linux_infcall_mmap); |
7f361056 | 2475 | set_gdbarch_infcall_munmap (gdbarch, linux_infcall_munmap); |
5cd867b4 | 2476 | set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type); |
a5ee0f0c | 2477 | } |
06253dd3 | 2478 | |
70221824 PA |
2479 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
2480 | extern initialize_file_ftype _initialize_linux_tdep; | |
2481 | ||
06253dd3 JK |
2482 | void |
2483 | _initialize_linux_tdep (void) | |
2484 | { | |
2485 | linux_gdbarch_data_handle = | |
2486 | gdbarch_data_register_post_init (init_linux_gdbarch_data); | |
cdfa0b0a PA |
2487 | |
2488 | /* Set a cache per-inferior. */ | |
2489 | linux_inferior_data | |
2490 | = register_inferior_data_with_cleanup (NULL, linux_inferior_data_cleanup); | |
2491 | /* Observers used to invalidate the cache when needed. */ | |
2492 | observer_attach_inferior_exit (invalidate_linux_cache_inf); | |
2493 | observer_attach_inferior_appeared (invalidate_linux_cache_inf); | |
df8411da SDJ |
2494 | |
2495 | add_setshow_boolean_cmd ("use-coredump-filter", class_files, | |
2496 | &use_coredump_filter, _("\ | |
2497 | Set whether gcore should consider /proc/PID/coredump_filter."), | |
2498 | _("\ | |
2499 | Show whether gcore should consider /proc/PID/coredump_filter."), | |
2500 | _("\ | |
2501 | Use this command to set whether gcore should consider the contents\n\ | |
2502 | of /proc/PID/coredump_filter when generating the corefile. For more information\n\ | |
2503 | about this file, refer to the manpage of core(5)."), | |
2504 | NULL, show_use_coredump_filter, | |
2505 | &setlist, &showlist); | |
06253dd3 | 2506 | } |