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4aa995e1 PA |
1 | /* Target-dependent code for GNU/Linux, architecture independent. |
2 | ||
42a4f53d | 3 | Copyright (C) 2009-2019 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" | |
76727919 | 35 | #include "observable.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" |
2d7cc5c7 | 41 | #include "common/gdb_optional.h" |
3030c96e UW |
42 | |
43 | #include <ctype.h> | |
4aa995e1 | 44 | |
db1ff28b JK |
45 | /* This enum represents the values that the user can choose when |
46 | informing the Linux kernel about which memory mappings will be | |
47 | dumped in a corefile. They are described in the file | |
48 | Documentation/filesystems/proc.txt, inside the Linux kernel | |
49 | tree. */ | |
50 | ||
8d297bbf | 51 | enum filter_flag |
db1ff28b JK |
52 | { |
53 | COREFILTER_ANON_PRIVATE = 1 << 0, | |
54 | COREFILTER_ANON_SHARED = 1 << 1, | |
55 | COREFILTER_MAPPED_PRIVATE = 1 << 2, | |
56 | COREFILTER_MAPPED_SHARED = 1 << 3, | |
57 | COREFILTER_ELF_HEADERS = 1 << 4, | |
58 | COREFILTER_HUGETLB_PRIVATE = 1 << 5, | |
59 | COREFILTER_HUGETLB_SHARED = 1 << 6, | |
60 | }; | |
8d297bbf | 61 | DEF_ENUM_FLAGS_TYPE (enum filter_flag, filter_flags); |
db1ff28b JK |
62 | |
63 | /* This struct is used to map flags found in the "VmFlags:" field (in | |
64 | the /proc/<PID>/smaps file). */ | |
65 | ||
66 | struct smaps_vmflags | |
67 | { | |
68 | /* Zero if this structure has not been initialized yet. It | |
69 | probably means that the Linux kernel being used does not emit | |
70 | the "VmFlags:" field on "/proc/PID/smaps". */ | |
71 | ||
72 | unsigned int initialized_p : 1; | |
73 | ||
74 | /* Memory mapped I/O area (VM_IO, "io"). */ | |
75 | ||
76 | unsigned int io_page : 1; | |
77 | ||
78 | /* Area uses huge TLB pages (VM_HUGETLB, "ht"). */ | |
79 | ||
80 | unsigned int uses_huge_tlb : 1; | |
81 | ||
82 | /* Do not include this memory region on the coredump (VM_DONTDUMP, "dd"). */ | |
83 | ||
84 | unsigned int exclude_coredump : 1; | |
85 | ||
86 | /* Is this a MAP_SHARED mapping (VM_SHARED, "sh"). */ | |
87 | ||
88 | unsigned int shared_mapping : 1; | |
89 | }; | |
90 | ||
df8411da SDJ |
91 | /* Whether to take the /proc/PID/coredump_filter into account when |
92 | generating a corefile. */ | |
93 | ||
94 | static int use_coredump_filter = 1; | |
95 | ||
afa840dc SL |
96 | /* Whether the value of smaps_vmflags->exclude_coredump should be |
97 | ignored, including mappings marked with the VM_DONTDUMP flag in | |
98 | the dump. */ | |
99 | static int dump_excluded_mappings = 0; | |
100 | ||
eb14d406 SDJ |
101 | /* This enum represents the signals' numbers on a generic architecture |
102 | running the Linux kernel. The definition of "generic" comes from | |
103 | the file <include/uapi/asm-generic/signal.h>, from the Linux kernel | |
104 | tree, which is the "de facto" implementation of signal numbers to | |
105 | be used by new architecture ports. | |
106 | ||
107 | For those architectures which have differences between the generic | |
108 | standard (e.g., Alpha), we define the different signals (and *only* | |
109 | those) in the specific target-dependent file (e.g., | |
110 | alpha-linux-tdep.c, for Alpha). Please refer to the architecture's | |
111 | tdep file for more information. | |
112 | ||
113 | ARM deserves a special mention here. On the file | |
114 | <arch/arm/include/uapi/asm/signal.h>, it defines only one different | |
115 | (and ARM-only) signal, which is SIGSWI, with the same number as | |
116 | SIGRTMIN. This signal is used only for a very specific target, | |
117 | called ArthurOS (from RISCOS). Therefore, we do not handle it on | |
118 | the ARM-tdep file, and we can safely use the generic signal handler | |
119 | here for ARM targets. | |
120 | ||
121 | As stated above, this enum is derived from | |
122 | <include/uapi/asm-generic/signal.h>, from the Linux kernel | |
123 | tree. */ | |
124 | ||
125 | enum | |
126 | { | |
127 | LINUX_SIGHUP = 1, | |
128 | LINUX_SIGINT = 2, | |
129 | LINUX_SIGQUIT = 3, | |
130 | LINUX_SIGILL = 4, | |
131 | LINUX_SIGTRAP = 5, | |
132 | LINUX_SIGABRT = 6, | |
133 | LINUX_SIGIOT = 6, | |
134 | LINUX_SIGBUS = 7, | |
135 | LINUX_SIGFPE = 8, | |
136 | LINUX_SIGKILL = 9, | |
137 | LINUX_SIGUSR1 = 10, | |
138 | LINUX_SIGSEGV = 11, | |
139 | LINUX_SIGUSR2 = 12, | |
140 | LINUX_SIGPIPE = 13, | |
141 | LINUX_SIGALRM = 14, | |
142 | LINUX_SIGTERM = 15, | |
143 | LINUX_SIGSTKFLT = 16, | |
144 | LINUX_SIGCHLD = 17, | |
145 | LINUX_SIGCONT = 18, | |
146 | LINUX_SIGSTOP = 19, | |
147 | LINUX_SIGTSTP = 20, | |
148 | LINUX_SIGTTIN = 21, | |
149 | LINUX_SIGTTOU = 22, | |
150 | LINUX_SIGURG = 23, | |
151 | LINUX_SIGXCPU = 24, | |
152 | LINUX_SIGXFSZ = 25, | |
153 | LINUX_SIGVTALRM = 26, | |
154 | LINUX_SIGPROF = 27, | |
155 | LINUX_SIGWINCH = 28, | |
156 | LINUX_SIGIO = 29, | |
157 | LINUX_SIGPOLL = LINUX_SIGIO, | |
158 | LINUX_SIGPWR = 30, | |
159 | LINUX_SIGSYS = 31, | |
160 | LINUX_SIGUNUSED = 31, | |
161 | ||
162 | LINUX_SIGRTMIN = 32, | |
163 | LINUX_SIGRTMAX = 64, | |
164 | }; | |
165 | ||
06253dd3 JK |
166 | static struct gdbarch_data *linux_gdbarch_data_handle; |
167 | ||
168 | struct linux_gdbarch_data | |
169 | { | |
170 | struct type *siginfo_type; | |
171 | }; | |
172 | ||
173 | static void * | |
174 | init_linux_gdbarch_data (struct gdbarch *gdbarch) | |
175 | { | |
176 | return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct linux_gdbarch_data); | |
177 | } | |
178 | ||
179 | static struct linux_gdbarch_data * | |
180 | get_linux_gdbarch_data (struct gdbarch *gdbarch) | |
181 | { | |
9a3c8263 SM |
182 | return ((struct linux_gdbarch_data *) |
183 | gdbarch_data (gdbarch, linux_gdbarch_data_handle)); | |
06253dd3 JK |
184 | } |
185 | ||
cdfa0b0a PA |
186 | /* Per-inferior data key. */ |
187 | static const struct inferior_data *linux_inferior_data; | |
188 | ||
189 | /* Linux-specific cached data. This is used by GDB for caching | |
190 | purposes for each inferior. This helps reduce the overhead of | |
191 | transfering data from a remote target to the local host. */ | |
192 | struct linux_info | |
193 | { | |
194 | /* Cache of the inferior's vsyscall/vDSO mapping range. Only valid | |
195 | if VSYSCALL_RANGE_P is positive. This is cached because getting | |
196 | at this info requires an auxv lookup (which is itself cached), | |
197 | and looking through the inferior's mappings (which change | |
198 | throughout execution and therefore cannot be cached). */ | |
199 | struct mem_range vsyscall_range; | |
200 | ||
201 | /* Zero if we haven't tried looking up the vsyscall's range before | |
202 | yet. Positive if we tried looking it up, and found it. Negative | |
203 | if we tried looking it up but failed. */ | |
204 | int vsyscall_range_p; | |
205 | }; | |
206 | ||
207 | /* Frees whatever allocated space there is to be freed and sets INF's | |
208 | linux cache data pointer to NULL. */ | |
209 | ||
210 | static void | |
211 | invalidate_linux_cache_inf (struct inferior *inf) | |
212 | { | |
213 | struct linux_info *info; | |
214 | ||
9a3c8263 | 215 | info = (struct linux_info *) inferior_data (inf, linux_inferior_data); |
cdfa0b0a PA |
216 | if (info != NULL) |
217 | { | |
218 | xfree (info); | |
219 | set_inferior_data (inf, linux_inferior_data, NULL); | |
220 | } | |
221 | } | |
222 | ||
223 | /* Handles the cleanup of the linux cache for inferior INF. ARG is | |
224 | ignored. Callback for the inferior_appeared and inferior_exit | |
225 | events. */ | |
226 | ||
227 | static void | |
228 | linux_inferior_data_cleanup (struct inferior *inf, void *arg) | |
229 | { | |
230 | invalidate_linux_cache_inf (inf); | |
231 | } | |
232 | ||
233 | /* Fetch the linux cache info for INF. This function always returns a | |
234 | valid INFO pointer. */ | |
235 | ||
236 | static struct linux_info * | |
237 | get_linux_inferior_data (void) | |
238 | { | |
239 | struct linux_info *info; | |
240 | struct inferior *inf = current_inferior (); | |
241 | ||
9a3c8263 | 242 | info = (struct linux_info *) inferior_data (inf, linux_inferior_data); |
cdfa0b0a PA |
243 | if (info == NULL) |
244 | { | |
245 | info = XCNEW (struct linux_info); | |
246 | set_inferior_data (inf, linux_inferior_data, info); | |
247 | } | |
248 | ||
249 | return info; | |
250 | } | |
251 | ||
190b495d | 252 | /* See linux-tdep.h. */ |
4aa995e1 | 253 | |
190b495d | 254 | struct type * |
43564574 WT |
255 | linux_get_siginfo_type_with_fields (struct gdbarch *gdbarch, |
256 | linux_siginfo_extra_fields extra_fields) | |
4aa995e1 | 257 | { |
06253dd3 | 258 | struct linux_gdbarch_data *linux_gdbarch_data; |
96b5c49f | 259 | struct type *int_type, *uint_type, *long_type, *void_ptr_type, *short_type; |
4aa995e1 PA |
260 | struct type *uid_type, *pid_type; |
261 | struct type *sigval_type, *clock_type; | |
262 | struct type *siginfo_type, *sifields_type; | |
263 | struct type *type; | |
264 | ||
06253dd3 JK |
265 | linux_gdbarch_data = get_linux_gdbarch_data (gdbarch); |
266 | if (linux_gdbarch_data->siginfo_type != NULL) | |
267 | return linux_gdbarch_data->siginfo_type; | |
268 | ||
e9bb382b UW |
269 | int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), |
270 | 0, "int"); | |
271 | uint_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
272 | 1, "unsigned int"); | |
273 | long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), | |
274 | 0, "long"); | |
96b5c49f WT |
275 | short_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), |
276 | 0, "short"); | |
4aa995e1 PA |
277 | void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void); |
278 | ||
279 | /* sival_t */ | |
e9bb382b | 280 | sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); |
4aa995e1 PA |
281 | TYPE_NAME (sigval_type) = xstrdup ("sigval_t"); |
282 | append_composite_type_field (sigval_type, "sival_int", int_type); | |
283 | append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type); | |
284 | ||
285 | /* __pid_t */ | |
e3aa49af | 286 | pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
77b7c781 | 287 | TYPE_LENGTH (int_type) * TARGET_CHAR_BIT, "__pid_t"); |
4aa995e1 | 288 | TYPE_TARGET_TYPE (pid_type) = int_type; |
e9bb382b | 289 | TYPE_TARGET_STUB (pid_type) = 1; |
4aa995e1 PA |
290 | |
291 | /* __uid_t */ | |
e3aa49af | 292 | uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
77b7c781 | 293 | TYPE_LENGTH (uint_type) * TARGET_CHAR_BIT, "__uid_t"); |
4aa995e1 | 294 | TYPE_TARGET_TYPE (uid_type) = uint_type; |
e9bb382b | 295 | TYPE_TARGET_STUB (uid_type) = 1; |
4aa995e1 PA |
296 | |
297 | /* __clock_t */ | |
e3aa49af | 298 | clock_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
77b7c781 UW |
299 | TYPE_LENGTH (long_type) * TARGET_CHAR_BIT, |
300 | "__clock_t"); | |
4aa995e1 | 301 | TYPE_TARGET_TYPE (clock_type) = long_type; |
e9bb382b | 302 | TYPE_TARGET_STUB (clock_type) = 1; |
4aa995e1 PA |
303 | |
304 | /* _sifields */ | |
e9bb382b | 305 | sifields_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); |
4aa995e1 PA |
306 | |
307 | { | |
308 | const int si_max_size = 128; | |
309 | int si_pad_size; | |
310 | int size_of_int = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT; | |
311 | ||
312 | /* _pad */ | |
313 | if (gdbarch_ptr_bit (gdbarch) == 64) | |
314 | si_pad_size = (si_max_size / size_of_int) - 4; | |
315 | else | |
316 | si_pad_size = (si_max_size / size_of_int) - 3; | |
317 | append_composite_type_field (sifields_type, "_pad", | |
318 | init_vector_type (int_type, si_pad_size)); | |
319 | } | |
320 | ||
321 | /* _kill */ | |
e9bb382b | 322 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
323 | append_composite_type_field (type, "si_pid", pid_type); |
324 | append_composite_type_field (type, "si_uid", uid_type); | |
325 | append_composite_type_field (sifields_type, "_kill", type); | |
326 | ||
327 | /* _timer */ | |
e9bb382b | 328 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
329 | append_composite_type_field (type, "si_tid", int_type); |
330 | append_composite_type_field (type, "si_overrun", int_type); | |
331 | append_composite_type_field (type, "si_sigval", sigval_type); | |
332 | append_composite_type_field (sifields_type, "_timer", type); | |
333 | ||
334 | /* _rt */ | |
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_sigval", sigval_type); | |
339 | append_composite_type_field (sifields_type, "_rt", type); | |
340 | ||
341 | /* _sigchld */ | |
e9bb382b | 342 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
343 | append_composite_type_field (type, "si_pid", pid_type); |
344 | append_composite_type_field (type, "si_uid", uid_type); | |
345 | append_composite_type_field (type, "si_status", int_type); | |
346 | append_composite_type_field (type, "si_utime", clock_type); | |
347 | append_composite_type_field (type, "si_stime", clock_type); | |
348 | append_composite_type_field (sifields_type, "_sigchld", type); | |
349 | ||
350 | /* _sigfault */ | |
e9bb382b | 351 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 | 352 | append_composite_type_field (type, "si_addr", void_ptr_type); |
96b5c49f WT |
353 | |
354 | /* Additional bound fields for _sigfault in case they were requested. */ | |
355 | if ((extra_fields & LINUX_SIGINFO_FIELD_ADDR_BND) != 0) | |
356 | { | |
357 | struct type *sigfault_bnd_fields; | |
358 | ||
359 | append_composite_type_field (type, "_addr_lsb", short_type); | |
360 | sigfault_bnd_fields = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); | |
361 | append_composite_type_field (sigfault_bnd_fields, "_lower", void_ptr_type); | |
362 | append_composite_type_field (sigfault_bnd_fields, "_upper", void_ptr_type); | |
363 | append_composite_type_field (type, "_addr_bnd", sigfault_bnd_fields); | |
364 | } | |
4aa995e1 PA |
365 | append_composite_type_field (sifields_type, "_sigfault", type); |
366 | ||
367 | /* _sigpoll */ | |
e9bb382b | 368 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
369 | append_composite_type_field (type, "si_band", long_type); |
370 | append_composite_type_field (type, "si_fd", int_type); | |
371 | append_composite_type_field (sifields_type, "_sigpoll", type); | |
372 | ||
373 | /* struct siginfo */ | |
e9bb382b | 374 | siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
375 | TYPE_NAME (siginfo_type) = xstrdup ("siginfo"); |
376 | append_composite_type_field (siginfo_type, "si_signo", int_type); | |
377 | append_composite_type_field (siginfo_type, "si_errno", int_type); | |
378 | append_composite_type_field (siginfo_type, "si_code", int_type); | |
379 | append_composite_type_field_aligned (siginfo_type, | |
380 | "_sifields", sifields_type, | |
381 | TYPE_LENGTH (long_type)); | |
382 | ||
06253dd3 JK |
383 | linux_gdbarch_data->siginfo_type = siginfo_type; |
384 | ||
4aa995e1 PA |
385 | return siginfo_type; |
386 | } | |
6b3ae818 | 387 | |
43564574 WT |
388 | /* This function is suitable for architectures that don't |
389 | extend/override the standard siginfo structure. */ | |
390 | ||
391 | static struct type * | |
392 | linux_get_siginfo_type (struct gdbarch *gdbarch) | |
393 | { | |
394 | return linux_get_siginfo_type_with_fields (gdbarch, 0); | |
395 | } | |
396 | ||
c01cbb3d YQ |
397 | /* Return true if the target is running on uClinux instead of normal |
398 | Linux kernel. */ | |
399 | ||
400 | int | |
401 | linux_is_uclinux (void) | |
6c95b8df | 402 | { |
6c95b8df | 403 | CORE_ADDR dummy; |
6c95b8df | 404 | |
8b88a78e PA |
405 | return (target_auxv_search (current_top_target (), AT_NULL, &dummy) > 0 |
406 | && target_auxv_search (current_top_target (), AT_PAGESZ, &dummy) == 0); | |
c01cbb3d | 407 | } |
6c95b8df | 408 | |
c01cbb3d YQ |
409 | static int |
410 | linux_has_shared_address_space (struct gdbarch *gdbarch) | |
411 | { | |
412 | return linux_is_uclinux (); | |
6c95b8df | 413 | } |
a5ee0f0c PA |
414 | |
415 | /* This is how we want PTIDs from core files to be printed. */ | |
416 | ||
a068643d | 417 | static std::string |
a5ee0f0c PA |
418 | linux_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid) |
419 | { | |
e38504b3 | 420 | if (ptid.lwp () != 0) |
a068643d | 421 | return string_printf ("LWP %ld", ptid.lwp ()); |
a5ee0f0c PA |
422 | |
423 | return normal_pid_to_str (ptid); | |
424 | } | |
425 | ||
db1ff28b JK |
426 | /* Service function for corefiles and info proc. */ |
427 | ||
428 | static void | |
429 | read_mapping (const char *line, | |
430 | ULONGEST *addr, ULONGEST *endaddr, | |
431 | const char **permissions, size_t *permissions_len, | |
432 | ULONGEST *offset, | |
433 | const char **device, size_t *device_len, | |
434 | ULONGEST *inode, | |
435 | const char **filename) | |
436 | { | |
437 | const char *p = line; | |
438 | ||
439 | *addr = strtoulst (p, &p, 16); | |
440 | if (*p == '-') | |
441 | p++; | |
442 | *endaddr = strtoulst (p, &p, 16); | |
443 | ||
f1735a53 | 444 | p = skip_spaces (p); |
db1ff28b JK |
445 | *permissions = p; |
446 | while (*p && !isspace (*p)) | |
447 | p++; | |
448 | *permissions_len = p - *permissions; | |
449 | ||
450 | *offset = strtoulst (p, &p, 16); | |
451 | ||
f1735a53 | 452 | p = skip_spaces (p); |
db1ff28b JK |
453 | *device = p; |
454 | while (*p && !isspace (*p)) | |
455 | p++; | |
456 | *device_len = p - *device; | |
457 | ||
458 | *inode = strtoulst (p, &p, 10); | |
459 | ||
f1735a53 | 460 | p = skip_spaces (p); |
db1ff28b JK |
461 | *filename = p; |
462 | } | |
463 | ||
464 | /* Helper function to decode the "VmFlags" field in /proc/PID/smaps. | |
465 | ||
466 | This function was based on the documentation found on | |
467 | <Documentation/filesystems/proc.txt>, on the Linux kernel. | |
468 | ||
469 | Linux kernels before commit | |
470 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10) do not have this | |
471 | field on smaps. */ | |
472 | ||
473 | static void | |
474 | decode_vmflags (char *p, struct smaps_vmflags *v) | |
475 | { | |
476 | char *saveptr = NULL; | |
477 | const char *s; | |
478 | ||
479 | v->initialized_p = 1; | |
480 | p = skip_to_space (p); | |
481 | p = skip_spaces (p); | |
482 | ||
483 | for (s = strtok_r (p, " ", &saveptr); | |
484 | s != NULL; | |
485 | s = strtok_r (NULL, " ", &saveptr)) | |
486 | { | |
487 | if (strcmp (s, "io") == 0) | |
488 | v->io_page = 1; | |
489 | else if (strcmp (s, "ht") == 0) | |
490 | v->uses_huge_tlb = 1; | |
491 | else if (strcmp (s, "dd") == 0) | |
492 | v->exclude_coredump = 1; | |
493 | else if (strcmp (s, "sh") == 0) | |
494 | v->shared_mapping = 1; | |
495 | } | |
496 | } | |
497 | ||
2d7cc5c7 PA |
498 | /* Regexes used by mapping_is_anonymous_p. Put in a structure because |
499 | they're initialized lazily. */ | |
500 | ||
501 | struct mapping_regexes | |
502 | { | |
503 | /* Matches "/dev/zero" filenames (with or without the "(deleted)" | |
504 | string in the end). We know for sure, based on the Linux kernel | |
505 | code, that memory mappings whose associated filename is | |
506 | "/dev/zero" are guaranteed to be MAP_ANONYMOUS. */ | |
507 | compiled_regex dev_zero | |
508 | {"^/dev/zero\\( (deleted)\\)\\?$", REG_NOSUB, | |
509 | _("Could not compile regex to match /dev/zero filename")}; | |
510 | ||
511 | /* Matches "/SYSV%08x" filenames (with or without the "(deleted)" | |
512 | string in the end). These filenames refer to shared memory | |
513 | (shmem), and memory mappings associated with them are | |
514 | MAP_ANONYMOUS as well. */ | |
515 | compiled_regex shmem_file | |
516 | {"^/\\?SYSV[0-9a-fA-F]\\{8\\}\\( (deleted)\\)\\?$", REG_NOSUB, | |
517 | _("Could not compile regex to match shmem filenames")}; | |
518 | ||
519 | /* A heuristic we use to try to mimic the Linux kernel's 'n_link == | |
520 | 0' code, which is responsible to decide if it is dealing with a | |
521 | 'MAP_SHARED | MAP_ANONYMOUS' mapping. In other words, if | |
522 | FILE_DELETED matches, it does not necessarily mean that we are | |
523 | dealing with an anonymous shared mapping. However, there is no | |
524 | easy way to detect this currently, so this is the best | |
525 | approximation we have. | |
526 | ||
527 | As a result, GDB will dump readonly pages of deleted executables | |
528 | when using the default value of coredump_filter (0x33), while the | |
529 | Linux kernel will not dump those pages. But we can live with | |
530 | that. */ | |
531 | compiled_regex file_deleted | |
532 | {" (deleted)$", REG_NOSUB, | |
533 | _("Could not compile regex to match '<file> (deleted)'")}; | |
534 | }; | |
535 | ||
db1ff28b JK |
536 | /* Return 1 if the memory mapping is anonymous, 0 otherwise. |
537 | ||
538 | FILENAME is the name of the file present in the first line of the | |
539 | memory mapping, in the "/proc/PID/smaps" output. For example, if | |
540 | the first line is: | |
541 | ||
542 | 7fd0ca877000-7fd0d0da0000 r--p 00000000 fd:02 2100770 /path/to/file | |
543 | ||
544 | Then FILENAME will be "/path/to/file". */ | |
545 | ||
546 | static int | |
547 | mapping_is_anonymous_p (const char *filename) | |
548 | { | |
2d7cc5c7 | 549 | static gdb::optional<mapping_regexes> regexes; |
db1ff28b JK |
550 | static int init_regex_p = 0; |
551 | ||
552 | if (!init_regex_p) | |
553 | { | |
db1ff28b JK |
554 | /* Let's be pessimistic and assume there will be an error while |
555 | compiling the regex'es. */ | |
556 | init_regex_p = -1; | |
557 | ||
2d7cc5c7 | 558 | regexes.emplace (); |
db1ff28b JK |
559 | |
560 | /* If we reached this point, then everything succeeded. */ | |
561 | init_regex_p = 1; | |
562 | } | |
563 | ||
564 | if (init_regex_p == -1) | |
565 | { | |
566 | const char deleted[] = " (deleted)"; | |
567 | size_t del_len = sizeof (deleted) - 1; | |
568 | size_t filename_len = strlen (filename); | |
569 | ||
570 | /* There was an error while compiling the regex'es above. In | |
571 | order to try to give some reliable information to the caller, | |
572 | we just try to find the string " (deleted)" in the filename. | |
573 | If we managed to find it, then we assume the mapping is | |
574 | anonymous. */ | |
575 | return (filename_len >= del_len | |
576 | && strcmp (filename + filename_len - del_len, deleted) == 0); | |
577 | } | |
578 | ||
579 | if (*filename == '\0' | |
2d7cc5c7 PA |
580 | || regexes->dev_zero.exec (filename, 0, NULL, 0) == 0 |
581 | || regexes->shmem_file.exec (filename, 0, NULL, 0) == 0 | |
582 | || regexes->file_deleted.exec (filename, 0, NULL, 0) == 0) | |
db1ff28b JK |
583 | return 1; |
584 | ||
585 | return 0; | |
586 | } | |
587 | ||
588 | /* Return 0 if the memory mapping (which is related to FILTERFLAGS, V, | |
57e5e645 SDJ |
589 | MAYBE_PRIVATE_P, MAPPING_ANONYMOUS_P, ADDR and OFFSET) should not |
590 | be dumped, or greater than 0 if it should. | |
db1ff28b JK |
591 | |
592 | In a nutshell, this is the logic that we follow in order to decide | |
593 | if a mapping should be dumped or not. | |
594 | ||
595 | - If the mapping is associated to a file whose name ends with | |
596 | " (deleted)", or if the file is "/dev/zero", or if it is | |
597 | "/SYSV%08x" (shared memory), or if there is no file associated | |
598 | with it, or if the AnonHugePages: or the Anonymous: fields in the | |
599 | /proc/PID/smaps have contents, then GDB considers this mapping to | |
600 | be anonymous. Otherwise, GDB considers this mapping to be a | |
601 | file-backed mapping (because there will be a file associated with | |
602 | it). | |
603 | ||
604 | It is worth mentioning that, from all those checks described | |
605 | above, the most fragile is the one to see if the file name ends | |
606 | with " (deleted)". This does not necessarily mean that the | |
607 | mapping is anonymous, because the deleted file associated with | |
608 | the mapping may have been a hard link to another file, for | |
609 | example. The Linux kernel checks to see if "i_nlink == 0", but | |
610 | GDB cannot easily (and normally) do this check (iff running as | |
611 | root, it could find the mapping in /proc/PID/map_files/ and | |
612 | determine whether there still are other hard links to the | |
613 | inode/file). Therefore, we made a compromise here, and we assume | |
614 | that if the file name ends with " (deleted)", then the mapping is | |
615 | indeed anonymous. FWIW, this is something the Linux kernel could | |
616 | do better: expose this information in a more direct way. | |
617 | ||
618 | - If we see the flag "sh" in the "VmFlags:" field (in | |
619 | /proc/PID/smaps), then certainly the memory mapping is shared | |
620 | (VM_SHARED). If we have access to the VmFlags, and we don't see | |
621 | the "sh" there, then certainly the mapping is private. However, | |
622 | Linux kernels before commit | |
623 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10) do not have the | |
624 | "VmFlags:" field; in that case, we use another heuristic: if we | |
625 | see 'p' in the permission flags, then we assume that the mapping | |
626 | is private, even though the presence of the 's' flag there would | |
627 | mean VM_MAYSHARE, which means the mapping could still be private. | |
57e5e645 SDJ |
628 | This should work OK enough, however. |
629 | ||
630 | - Even if, at the end, we decided that we should not dump the | |
631 | mapping, we still have to check if it is something like an ELF | |
632 | header (of a DSO or an executable, for example). If it is, and | |
633 | if the user is interested in dump it, then we should dump it. */ | |
db1ff28b JK |
634 | |
635 | static int | |
8d297bbf | 636 | dump_mapping_p (filter_flags filterflags, const struct smaps_vmflags *v, |
db1ff28b | 637 | int maybe_private_p, int mapping_anon_p, int mapping_file_p, |
57e5e645 | 638 | const char *filename, ULONGEST addr, ULONGEST offset) |
db1ff28b JK |
639 | { |
640 | /* Initially, we trust in what we received from our caller. This | |
641 | value may not be very precise (i.e., it was probably gathered | |
642 | from the permission line in the /proc/PID/smaps list, which | |
643 | actually refers to VM_MAYSHARE, and not VM_SHARED), but it is | |
644 | what we have until we take a look at the "VmFlags:" field | |
645 | (assuming that the version of the Linux kernel being used | |
646 | supports it, of course). */ | |
647 | int private_p = maybe_private_p; | |
57e5e645 | 648 | int dump_p; |
db1ff28b JK |
649 | |
650 | /* We always dump vDSO and vsyscall mappings, because it's likely that | |
651 | there'll be no file to read the contents from at core load time. | |
652 | The kernel does the same. */ | |
653 | if (strcmp ("[vdso]", filename) == 0 | |
654 | || strcmp ("[vsyscall]", filename) == 0) | |
655 | return 1; | |
656 | ||
657 | if (v->initialized_p) | |
658 | { | |
659 | /* We never dump I/O mappings. */ | |
660 | if (v->io_page) | |
661 | return 0; | |
662 | ||
663 | /* Check if we should exclude this mapping. */ | |
afa840dc | 664 | if (!dump_excluded_mappings && v->exclude_coredump) |
db1ff28b JK |
665 | return 0; |
666 | ||
667 | /* Update our notion of whether this mapping is shared or | |
668 | private based on a trustworthy value. */ | |
669 | private_p = !v->shared_mapping; | |
670 | ||
671 | /* HugeTLB checking. */ | |
672 | if (v->uses_huge_tlb) | |
673 | { | |
674 | if ((private_p && (filterflags & COREFILTER_HUGETLB_PRIVATE)) | |
675 | || (!private_p && (filterflags & COREFILTER_HUGETLB_SHARED))) | |
676 | return 1; | |
677 | ||
678 | return 0; | |
679 | } | |
680 | } | |
681 | ||
682 | if (private_p) | |
683 | { | |
684 | if (mapping_anon_p && mapping_file_p) | |
685 | { | |
686 | /* This is a special situation. It can happen when we see a | |
687 | mapping that is file-backed, but that contains anonymous | |
688 | pages. */ | |
57e5e645 SDJ |
689 | dump_p = ((filterflags & COREFILTER_ANON_PRIVATE) != 0 |
690 | || (filterflags & COREFILTER_MAPPED_PRIVATE) != 0); | |
db1ff28b JK |
691 | } |
692 | else if (mapping_anon_p) | |
57e5e645 | 693 | dump_p = (filterflags & COREFILTER_ANON_PRIVATE) != 0; |
db1ff28b | 694 | else |
57e5e645 | 695 | dump_p = (filterflags & COREFILTER_MAPPED_PRIVATE) != 0; |
db1ff28b JK |
696 | } |
697 | else | |
698 | { | |
699 | if (mapping_anon_p && mapping_file_p) | |
700 | { | |
701 | /* This is a special situation. It can happen when we see a | |
702 | mapping that is file-backed, but that contains anonymous | |
703 | pages. */ | |
57e5e645 SDJ |
704 | dump_p = ((filterflags & COREFILTER_ANON_SHARED) != 0 |
705 | || (filterflags & COREFILTER_MAPPED_SHARED) != 0); | |
db1ff28b JK |
706 | } |
707 | else if (mapping_anon_p) | |
57e5e645 | 708 | dump_p = (filterflags & COREFILTER_ANON_SHARED) != 0; |
db1ff28b | 709 | else |
57e5e645 | 710 | dump_p = (filterflags & COREFILTER_MAPPED_SHARED) != 0; |
db1ff28b | 711 | } |
57e5e645 SDJ |
712 | |
713 | /* Even if we decided that we shouldn't dump this mapping, we still | |
714 | have to check whether (a) the user wants us to dump mappings | |
715 | containing an ELF header, and (b) the mapping in question | |
716 | contains an ELF header. If (a) and (b) are true, then we should | |
717 | dump this mapping. | |
718 | ||
719 | A mapping contains an ELF header if it is a private mapping, its | |
720 | offset is zero, and its first word is ELFMAG. */ | |
721 | if (!dump_p && private_p && offset == 0 | |
722 | && (filterflags & COREFILTER_ELF_HEADERS) != 0) | |
723 | { | |
724 | /* Let's check if we have an ELF header. */ | |
725 | gdb::unique_xmalloc_ptr<char> header; | |
726 | int errcode; | |
727 | ||
728 | /* Useful define specifying the size of the ELF magical | |
729 | header. */ | |
730 | #ifndef SELFMAG | |
731 | #define SELFMAG 4 | |
732 | #endif | |
733 | ||
734 | /* Read the first SELFMAG bytes and check if it is ELFMAG. */ | |
735 | if (target_read_string (addr, &header, SELFMAG, &errcode) == SELFMAG | |
736 | && errcode == 0) | |
737 | { | |
738 | const char *h = header.get (); | |
739 | ||
740 | /* The EI_MAG* and ELFMAG* constants come from | |
741 | <elf/common.h>. */ | |
742 | if (h[EI_MAG0] == ELFMAG0 && h[EI_MAG1] == ELFMAG1 | |
743 | && h[EI_MAG2] == ELFMAG2 && h[EI_MAG3] == ELFMAG3) | |
744 | { | |
745 | /* This mapping contains an ELF header, so we | |
746 | should dump it. */ | |
747 | dump_p = 1; | |
748 | } | |
749 | } | |
750 | } | |
751 | ||
752 | return dump_p; | |
db1ff28b JK |
753 | } |
754 | ||
3030c96e UW |
755 | /* Implement the "info proc" command. */ |
756 | ||
757 | static void | |
7bc112c1 | 758 | linux_info_proc (struct gdbarch *gdbarch, const char *args, |
3030c96e UW |
759 | enum info_proc_what what) |
760 | { | |
761 | /* A long is used for pid instead of an int to avoid a loss of precision | |
762 | compiler warning from the output of strtoul. */ | |
763 | long pid; | |
764 | int cmdline_f = (what == IP_MINIMAL || what == IP_CMDLINE || what == IP_ALL); | |
765 | int cwd_f = (what == IP_MINIMAL || what == IP_CWD || what == IP_ALL); | |
766 | int exe_f = (what == IP_MINIMAL || what == IP_EXE || what == IP_ALL); | |
767 | int mappings_f = (what == IP_MAPPINGS || what == IP_ALL); | |
768 | int status_f = (what == IP_STATUS || what == IP_ALL); | |
769 | int stat_f = (what == IP_STAT || what == IP_ALL); | |
770 | char filename[100]; | |
3030c96e UW |
771 | int target_errno; |
772 | ||
773 | if (args && isdigit (args[0])) | |
7bc112c1 TT |
774 | { |
775 | char *tem; | |
776 | ||
777 | pid = strtoul (args, &tem, 10); | |
778 | args = tem; | |
779 | } | |
3030c96e UW |
780 | else |
781 | { | |
782 | if (!target_has_execution) | |
783 | error (_("No current process: you must name one.")); | |
784 | if (current_inferior ()->fake_pid_p) | |
785 | error (_("Can't determine the current process's PID: you must name one.")); | |
786 | ||
787 | pid = current_inferior ()->pid; | |
788 | } | |
789 | ||
f1735a53 | 790 | args = skip_spaces (args); |
3030c96e UW |
791 | if (args && args[0]) |
792 | error (_("Too many parameters: %s"), args); | |
793 | ||
794 | printf_filtered (_("process %ld\n"), pid); | |
795 | if (cmdline_f) | |
796 | { | |
797 | xsnprintf (filename, sizeof filename, "/proc/%ld/cmdline", pid); | |
26d6cec4 AA |
798 | gdb_byte *buffer; |
799 | ssize_t len = target_fileio_read_alloc (NULL, filename, &buffer); | |
800 | ||
801 | if (len > 0) | |
802 | { | |
803 | gdb::unique_xmalloc_ptr<char> cmdline ((char *) buffer); | |
804 | ssize_t pos; | |
805 | ||
806 | for (pos = 0; pos < len - 1; pos++) | |
807 | { | |
808 | if (buffer[pos] == '\0') | |
809 | buffer[pos] = ' '; | |
810 | } | |
811 | buffer[len - 1] = '\0'; | |
812 | printf_filtered ("cmdline = '%s'\n", buffer); | |
813 | } | |
3030c96e UW |
814 | else |
815 | warning (_("unable to open /proc file '%s'"), filename); | |
816 | } | |
817 | if (cwd_f) | |
818 | { | |
819 | xsnprintf (filename, sizeof filename, "/proc/%ld/cwd", pid); | |
e0d3522b TT |
820 | gdb::optional<std::string> contents |
821 | = target_fileio_readlink (NULL, filename, &target_errno); | |
822 | if (contents.has_value ()) | |
823 | printf_filtered ("cwd = '%s'\n", contents->c_str ()); | |
3030c96e UW |
824 | else |
825 | warning (_("unable to read link '%s'"), filename); | |
826 | } | |
827 | if (exe_f) | |
828 | { | |
829 | xsnprintf (filename, sizeof filename, "/proc/%ld/exe", pid); | |
e0d3522b TT |
830 | gdb::optional<std::string> contents |
831 | = target_fileio_readlink (NULL, filename, &target_errno); | |
832 | if (contents.has_value ()) | |
833 | printf_filtered ("exe = '%s'\n", contents->c_str ()); | |
3030c96e UW |
834 | else |
835 | warning (_("unable to read link '%s'"), filename); | |
836 | } | |
837 | if (mappings_f) | |
838 | { | |
839 | xsnprintf (filename, sizeof filename, "/proc/%ld/maps", pid); | |
87028b87 TT |
840 | gdb::unique_xmalloc_ptr<char> map |
841 | = target_fileio_read_stralloc (NULL, filename); | |
842 | if (map != NULL) | |
3030c96e | 843 | { |
3030c96e UW |
844 | char *line; |
845 | ||
846 | printf_filtered (_("Mapped address spaces:\n\n")); | |
847 | if (gdbarch_addr_bit (gdbarch) == 32) | |
848 | { | |
849 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
850 | "Start Addr", | |
851 | " End Addr", | |
852 | " Size", " Offset", "objfile"); | |
853 | } | |
854 | else | |
855 | { | |
856 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
857 | "Start Addr", | |
858 | " End Addr", | |
859 | " Size", " Offset", "objfile"); | |
860 | } | |
861 | ||
87028b87 TT |
862 | for (line = strtok (map.get (), "\n"); |
863 | line; | |
864 | line = strtok (NULL, "\n")) | |
3030c96e UW |
865 | { |
866 | ULONGEST addr, endaddr, offset, inode; | |
b926417a | 867 | const char *permissions, *device, *mapping_filename; |
3030c96e UW |
868 | size_t permissions_len, device_len; |
869 | ||
870 | read_mapping (line, &addr, &endaddr, | |
871 | &permissions, &permissions_len, | |
872 | &offset, &device, &device_len, | |
b926417a | 873 | &inode, &mapping_filename); |
3030c96e UW |
874 | |
875 | if (gdbarch_addr_bit (gdbarch) == 32) | |
876 | { | |
877 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
878 | paddress (gdbarch, addr), | |
879 | paddress (gdbarch, endaddr), | |
880 | hex_string (endaddr - addr), | |
881 | hex_string (offset), | |
b926417a | 882 | *mapping_filename ? mapping_filename : ""); |
3030c96e UW |
883 | } |
884 | else | |
885 | { | |
886 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
887 | paddress (gdbarch, addr), | |
888 | paddress (gdbarch, endaddr), | |
889 | hex_string (endaddr - addr), | |
890 | hex_string (offset), | |
b926417a | 891 | *mapping_filename ? mapping_filename : ""); |
3030c96e UW |
892 | } |
893 | } | |
3030c96e UW |
894 | } |
895 | else | |
896 | warning (_("unable to open /proc file '%s'"), filename); | |
897 | } | |
898 | if (status_f) | |
899 | { | |
900 | xsnprintf (filename, sizeof filename, "/proc/%ld/status", pid); | |
87028b87 TT |
901 | gdb::unique_xmalloc_ptr<char> status |
902 | = target_fileio_read_stralloc (NULL, filename); | |
903 | if (status) | |
904 | puts_filtered (status.get ()); | |
3030c96e UW |
905 | else |
906 | warning (_("unable to open /proc file '%s'"), filename); | |
907 | } | |
908 | if (stat_f) | |
909 | { | |
910 | xsnprintf (filename, sizeof filename, "/proc/%ld/stat", pid); | |
87028b87 TT |
911 | gdb::unique_xmalloc_ptr<char> statstr |
912 | = target_fileio_read_stralloc (NULL, filename); | |
913 | if (statstr) | |
3030c96e | 914 | { |
87028b87 | 915 | const char *p = statstr.get (); |
3030c96e UW |
916 | |
917 | printf_filtered (_("Process: %s\n"), | |
918 | pulongest (strtoulst (p, &p, 10))); | |
919 | ||
f1735a53 | 920 | p = skip_spaces (p); |
a71b5a38 | 921 | if (*p == '(') |
3030c96e | 922 | { |
184cd072 JK |
923 | /* ps command also relies on no trailing fields |
924 | ever contain ')'. */ | |
925 | const char *ep = strrchr (p, ')'); | |
a71b5a38 UW |
926 | if (ep != NULL) |
927 | { | |
928 | printf_filtered ("Exec file: %.*s\n", | |
929 | (int) (ep - p - 1), p + 1); | |
930 | p = ep + 1; | |
931 | } | |
3030c96e UW |
932 | } |
933 | ||
f1735a53 | 934 | p = skip_spaces (p); |
3030c96e UW |
935 | if (*p) |
936 | printf_filtered (_("State: %c\n"), *p++); | |
937 | ||
938 | if (*p) | |
939 | printf_filtered (_("Parent process: %s\n"), | |
940 | pulongest (strtoulst (p, &p, 10))); | |
941 | if (*p) | |
942 | printf_filtered (_("Process group: %s\n"), | |
943 | pulongest (strtoulst (p, &p, 10))); | |
944 | if (*p) | |
945 | printf_filtered (_("Session id: %s\n"), | |
946 | pulongest (strtoulst (p, &p, 10))); | |
947 | if (*p) | |
948 | printf_filtered (_("TTY: %s\n"), | |
949 | pulongest (strtoulst (p, &p, 10))); | |
950 | if (*p) | |
951 | printf_filtered (_("TTY owner process group: %s\n"), | |
952 | pulongest (strtoulst (p, &p, 10))); | |
953 | ||
954 | if (*p) | |
955 | printf_filtered (_("Flags: %s\n"), | |
956 | hex_string (strtoulst (p, &p, 10))); | |
957 | if (*p) | |
958 | printf_filtered (_("Minor faults (no memory page): %s\n"), | |
959 | pulongest (strtoulst (p, &p, 10))); | |
960 | if (*p) | |
961 | printf_filtered (_("Minor faults, children: %s\n"), | |
962 | pulongest (strtoulst (p, &p, 10))); | |
963 | if (*p) | |
964 | printf_filtered (_("Major faults (memory page faults): %s\n"), | |
965 | pulongest (strtoulst (p, &p, 10))); | |
966 | if (*p) | |
967 | printf_filtered (_("Major faults, children: %s\n"), | |
968 | pulongest (strtoulst (p, &p, 10))); | |
969 | if (*p) | |
970 | printf_filtered (_("utime: %s\n"), | |
971 | pulongest (strtoulst (p, &p, 10))); | |
972 | if (*p) | |
973 | printf_filtered (_("stime: %s\n"), | |
974 | pulongest (strtoulst (p, &p, 10))); | |
975 | if (*p) | |
976 | printf_filtered (_("utime, children: %s\n"), | |
977 | pulongest (strtoulst (p, &p, 10))); | |
978 | if (*p) | |
979 | printf_filtered (_("stime, children: %s\n"), | |
980 | pulongest (strtoulst (p, &p, 10))); | |
981 | if (*p) | |
982 | printf_filtered (_("jiffies remaining in current " | |
983 | "time slice: %s\n"), | |
984 | pulongest (strtoulst (p, &p, 10))); | |
985 | if (*p) | |
986 | printf_filtered (_("'nice' value: %s\n"), | |
987 | pulongest (strtoulst (p, &p, 10))); | |
988 | if (*p) | |
989 | printf_filtered (_("jiffies until next timeout: %s\n"), | |
990 | pulongest (strtoulst (p, &p, 10))); | |
991 | if (*p) | |
992 | printf_filtered (_("jiffies until next SIGALRM: %s\n"), | |
993 | pulongest (strtoulst (p, &p, 10))); | |
994 | if (*p) | |
995 | printf_filtered (_("start time (jiffies since " | |
996 | "system boot): %s\n"), | |
997 | pulongest (strtoulst (p, &p, 10))); | |
998 | if (*p) | |
999 | printf_filtered (_("Virtual memory size: %s\n"), | |
1000 | pulongest (strtoulst (p, &p, 10))); | |
1001 | if (*p) | |
1002 | printf_filtered (_("Resident set size: %s\n"), | |
1003 | pulongest (strtoulst (p, &p, 10))); | |
1004 | if (*p) | |
1005 | printf_filtered (_("rlim: %s\n"), | |
1006 | pulongest (strtoulst (p, &p, 10))); | |
1007 | if (*p) | |
1008 | printf_filtered (_("Start of text: %s\n"), | |
1009 | hex_string (strtoulst (p, &p, 10))); | |
1010 | if (*p) | |
1011 | printf_filtered (_("End of text: %s\n"), | |
1012 | hex_string (strtoulst (p, &p, 10))); | |
1013 | if (*p) | |
1014 | printf_filtered (_("Start of stack: %s\n"), | |
1015 | hex_string (strtoulst (p, &p, 10))); | |
1016 | #if 0 /* Don't know how architecture-dependent the rest is... | |
1017 | Anyway the signal bitmap info is available from "status". */ | |
1018 | if (*p) | |
1019 | printf_filtered (_("Kernel stack pointer: %s\n"), | |
1020 | hex_string (strtoulst (p, &p, 10))); | |
1021 | if (*p) | |
1022 | printf_filtered (_("Kernel instr pointer: %s\n"), | |
1023 | hex_string (strtoulst (p, &p, 10))); | |
1024 | if (*p) | |
1025 | printf_filtered (_("Pending signals bitmap: %s\n"), | |
1026 | hex_string (strtoulst (p, &p, 10))); | |
1027 | if (*p) | |
1028 | printf_filtered (_("Blocked signals bitmap: %s\n"), | |
1029 | hex_string (strtoulst (p, &p, 10))); | |
1030 | if (*p) | |
1031 | printf_filtered (_("Ignored signals bitmap: %s\n"), | |
1032 | hex_string (strtoulst (p, &p, 10))); | |
1033 | if (*p) | |
1034 | printf_filtered (_("Catched signals bitmap: %s\n"), | |
1035 | hex_string (strtoulst (p, &p, 10))); | |
1036 | if (*p) | |
1037 | printf_filtered (_("wchan (system call): %s\n"), | |
1038 | hex_string (strtoulst (p, &p, 10))); | |
1039 | #endif | |
3030c96e UW |
1040 | } |
1041 | else | |
1042 | warning (_("unable to open /proc file '%s'"), filename); | |
1043 | } | |
1044 | } | |
1045 | ||
451b7c33 TT |
1046 | /* Implement "info proc mappings" for a corefile. */ |
1047 | ||
1048 | static void | |
7bc112c1 | 1049 | linux_core_info_proc_mappings (struct gdbarch *gdbarch, const char *args) |
451b7c33 TT |
1050 | { |
1051 | asection *section; | |
1052 | ULONGEST count, page_size; | |
9f584b37 | 1053 | unsigned char *descdata, *filenames, *descend; |
451b7c33 TT |
1054 | size_t note_size; |
1055 | unsigned int addr_size_bits, addr_size; | |
451b7c33 TT |
1056 | struct gdbarch *core_gdbarch = gdbarch_from_bfd (core_bfd); |
1057 | /* We assume this for reading 64-bit core files. */ | |
1058 | gdb_static_assert (sizeof (ULONGEST) >= 8); | |
1059 | ||
1060 | section = bfd_get_section_by_name (core_bfd, ".note.linuxcore.file"); | |
1061 | if (section == NULL) | |
1062 | { | |
1063 | warning (_("unable to find mappings in core file")); | |
1064 | return; | |
1065 | } | |
1066 | ||
1067 | addr_size_bits = gdbarch_addr_bit (core_gdbarch); | |
1068 | addr_size = addr_size_bits / 8; | |
1069 | note_size = bfd_get_section_size (section); | |
1070 | ||
1071 | if (note_size < 2 * addr_size) | |
1072 | error (_("malformed core note - too short for header")); | |
1073 | ||
9f584b37 TT |
1074 | gdb::def_vector<unsigned char> contents (note_size); |
1075 | if (!bfd_get_section_contents (core_bfd, section, contents.data (), | |
1076 | 0, note_size)) | |
451b7c33 TT |
1077 | error (_("could not get core note contents")); |
1078 | ||
9f584b37 | 1079 | descdata = contents.data (); |
451b7c33 TT |
1080 | descend = descdata + note_size; |
1081 | ||
1082 | if (descdata[note_size - 1] != '\0') | |
1083 | error (_("malformed note - does not end with \\0")); | |
1084 | ||
1085 | count = bfd_get (addr_size_bits, core_bfd, descdata); | |
1086 | descdata += addr_size; | |
1087 | ||
1088 | page_size = bfd_get (addr_size_bits, core_bfd, descdata); | |
1089 | descdata += addr_size; | |
1090 | ||
1091 | if (note_size < 2 * addr_size + count * 3 * addr_size) | |
1092 | error (_("malformed note - too short for supplied file count")); | |
1093 | ||
1094 | printf_filtered (_("Mapped address spaces:\n\n")); | |
1095 | if (gdbarch_addr_bit (gdbarch) == 32) | |
1096 | { | |
1097 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
1098 | "Start Addr", | |
1099 | " End Addr", | |
1100 | " Size", " Offset", "objfile"); | |
1101 | } | |
1102 | else | |
1103 | { | |
1104 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
1105 | "Start Addr", | |
1106 | " End Addr", | |
1107 | " Size", " Offset", "objfile"); | |
1108 | } | |
1109 | ||
1110 | filenames = descdata + count * 3 * addr_size; | |
1111 | while (--count > 0) | |
1112 | { | |
1113 | ULONGEST start, end, file_ofs; | |
1114 | ||
1115 | if (filenames == descend) | |
1116 | error (_("malformed note - filenames end too early")); | |
1117 | ||
1118 | start = bfd_get (addr_size_bits, core_bfd, descdata); | |
1119 | descdata += addr_size; | |
1120 | end = bfd_get (addr_size_bits, core_bfd, descdata); | |
1121 | descdata += addr_size; | |
1122 | file_ofs = bfd_get (addr_size_bits, core_bfd, descdata); | |
1123 | descdata += addr_size; | |
1124 | ||
1125 | file_ofs *= page_size; | |
1126 | ||
1127 | if (gdbarch_addr_bit (gdbarch) == 32) | |
1128 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
1129 | paddress (gdbarch, start), | |
1130 | paddress (gdbarch, end), | |
1131 | hex_string (end - start), | |
1132 | hex_string (file_ofs), | |
1133 | filenames); | |
1134 | else | |
1135 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
1136 | paddress (gdbarch, start), | |
1137 | paddress (gdbarch, end), | |
1138 | hex_string (end - start), | |
1139 | hex_string (file_ofs), | |
1140 | filenames); | |
1141 | ||
1142 | filenames += 1 + strlen ((char *) filenames); | |
1143 | } | |
451b7c33 TT |
1144 | } |
1145 | ||
1146 | /* Implement "info proc" for a corefile. */ | |
1147 | ||
1148 | static void | |
7bc112c1 | 1149 | linux_core_info_proc (struct gdbarch *gdbarch, const char *args, |
451b7c33 TT |
1150 | enum info_proc_what what) |
1151 | { | |
1152 | int exe_f = (what == IP_MINIMAL || what == IP_EXE || what == IP_ALL); | |
1153 | int mappings_f = (what == IP_MAPPINGS || what == IP_ALL); | |
1154 | ||
1155 | if (exe_f) | |
1156 | { | |
1157 | const char *exe; | |
1158 | ||
1159 | exe = bfd_core_file_failing_command (core_bfd); | |
1160 | if (exe != NULL) | |
1161 | printf_filtered ("exe = '%s'\n", exe); | |
1162 | else | |
1163 | warning (_("unable to find command name in core file")); | |
1164 | } | |
1165 | ||
1166 | if (mappings_f) | |
1167 | linux_core_info_proc_mappings (gdbarch, args); | |
1168 | ||
1169 | if (!exe_f && !mappings_f) | |
1170 | error (_("unable to handle request")); | |
1171 | } | |
1172 | ||
382b69bb JB |
1173 | /* Read siginfo data from the core, if possible. Returns -1 on |
1174 | failure. Otherwise, returns the number of bytes read. READBUF, | |
1175 | OFFSET, and LEN are all as specified by the to_xfer_partial | |
1176 | interface. */ | |
1177 | ||
1178 | static LONGEST | |
1179 | linux_core_xfer_siginfo (struct gdbarch *gdbarch, gdb_byte *readbuf, | |
1180 | ULONGEST offset, ULONGEST len) | |
1181 | { | |
1182 | thread_section_name section_name (".note.linuxcore.siginfo", inferior_ptid); | |
1183 | asection *section = bfd_get_section_by_name (core_bfd, section_name.c_str ()); | |
1184 | if (section == NULL) | |
1185 | return -1; | |
1186 | ||
1187 | if (!bfd_get_section_contents (core_bfd, section, readbuf, offset, len)) | |
1188 | return -1; | |
1189 | ||
1190 | return len; | |
1191 | } | |
1192 | ||
db1ff28b JK |
1193 | typedef int linux_find_memory_region_ftype (ULONGEST vaddr, ULONGEST size, |
1194 | ULONGEST offset, ULONGEST inode, | |
1195 | int read, int write, | |
1196 | int exec, int modified, | |
1197 | const char *filename, | |
1198 | void *data); | |
451b7c33 | 1199 | |
db1ff28b | 1200 | /* List memory regions in the inferior for a corefile. */ |
451b7c33 TT |
1201 | |
1202 | static int | |
db1ff28b JK |
1203 | linux_find_memory_regions_full (struct gdbarch *gdbarch, |
1204 | linux_find_memory_region_ftype *func, | |
1205 | void *obfd) | |
f7af1fcd | 1206 | { |
db1ff28b JK |
1207 | char mapsfilename[100]; |
1208 | char coredumpfilter_name[100]; | |
f7af1fcd JK |
1209 | pid_t pid; |
1210 | /* Default dump behavior of coredump_filter (0x33), according to | |
1211 | Documentation/filesystems/proc.txt from the Linux kernel | |
1212 | tree. */ | |
8d297bbf PA |
1213 | filter_flags filterflags = (COREFILTER_ANON_PRIVATE |
1214 | | COREFILTER_ANON_SHARED | |
1215 | | COREFILTER_ELF_HEADERS | |
1216 | | COREFILTER_HUGETLB_PRIVATE); | |
f7af1fcd | 1217 | |
db1ff28b | 1218 | /* We need to know the real target PID to access /proc. */ |
f7af1fcd | 1219 | if (current_inferior ()->fake_pid_p) |
db1ff28b | 1220 | return 1; |
f7af1fcd JK |
1221 | |
1222 | pid = current_inferior ()->pid; | |
1223 | ||
1224 | if (use_coredump_filter) | |
1225 | { | |
f7af1fcd JK |
1226 | xsnprintf (coredumpfilter_name, sizeof (coredumpfilter_name), |
1227 | "/proc/%d/coredump_filter", pid); | |
87028b87 TT |
1228 | gdb::unique_xmalloc_ptr<char> coredumpfilterdata |
1229 | = target_fileio_read_stralloc (NULL, coredumpfilter_name); | |
f7af1fcd JK |
1230 | if (coredumpfilterdata != NULL) |
1231 | { | |
8d297bbf PA |
1232 | unsigned int flags; |
1233 | ||
87028b87 | 1234 | sscanf (coredumpfilterdata.get (), "%x", &flags); |
8d297bbf | 1235 | filterflags = (enum filter_flag) flags; |
f7af1fcd JK |
1236 | } |
1237 | } | |
1238 | ||
db1ff28b | 1239 | xsnprintf (mapsfilename, sizeof mapsfilename, "/proc/%d/smaps", pid); |
87028b87 TT |
1240 | gdb::unique_xmalloc_ptr<char> data |
1241 | = target_fileio_read_stralloc (NULL, mapsfilename); | |
db1ff28b JK |
1242 | if (data == NULL) |
1243 | { | |
1244 | /* Older Linux kernels did not support /proc/PID/smaps. */ | |
1245 | xsnprintf (mapsfilename, sizeof mapsfilename, "/proc/%d/maps", pid); | |
1246 | data = target_fileio_read_stralloc (NULL, mapsfilename); | |
1247 | } | |
1248 | ||
1249 | if (data != NULL) | |
1250 | { | |
db1ff28b JK |
1251 | char *line, *t; |
1252 | ||
87028b87 | 1253 | line = strtok_r (data.get (), "\n", &t); |
db1ff28b JK |
1254 | while (line != NULL) |
1255 | { | |
1256 | ULONGEST addr, endaddr, offset, inode; | |
1257 | const char *permissions, *device, *filename; | |
1258 | struct smaps_vmflags v; | |
1259 | size_t permissions_len, device_len; | |
1260 | int read, write, exec, priv; | |
1261 | int has_anonymous = 0; | |
1262 | int should_dump_p = 0; | |
1263 | int mapping_anon_p; | |
1264 | int mapping_file_p; | |
1265 | ||
1266 | memset (&v, 0, sizeof (v)); | |
1267 | read_mapping (line, &addr, &endaddr, &permissions, &permissions_len, | |
1268 | &offset, &device, &device_len, &inode, &filename); | |
1269 | mapping_anon_p = mapping_is_anonymous_p (filename); | |
1270 | /* If the mapping is not anonymous, then we can consider it | |
1271 | to be file-backed. These two states (anonymous or | |
1272 | file-backed) seem to be exclusive, but they can actually | |
1273 | coexist. For example, if a file-backed mapping has | |
1274 | "Anonymous:" pages (see more below), then the Linux | |
1275 | kernel will dump this mapping when the user specified | |
1276 | that she only wants anonymous mappings in the corefile | |
1277 | (*even* when she explicitly disabled the dumping of | |
1278 | file-backed mappings). */ | |
1279 | mapping_file_p = !mapping_anon_p; | |
1280 | ||
1281 | /* Decode permissions. */ | |
1282 | read = (memchr (permissions, 'r', permissions_len) != 0); | |
1283 | write = (memchr (permissions, 'w', permissions_len) != 0); | |
1284 | exec = (memchr (permissions, 'x', permissions_len) != 0); | |
1285 | /* 'private' here actually means VM_MAYSHARE, and not | |
1286 | VM_SHARED. In order to know if a mapping is really | |
1287 | private or not, we must check the flag "sh" in the | |
1288 | VmFlags field. This is done by decode_vmflags. However, | |
1289 | if we are using a Linux kernel released before the commit | |
1290 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10), we will | |
1291 | not have the VmFlags there. In this case, there is | |
1292 | really no way to know if we are dealing with VM_SHARED, | |
1293 | so we just assume that VM_MAYSHARE is enough. */ | |
1294 | priv = memchr (permissions, 'p', permissions_len) != 0; | |
1295 | ||
1296 | /* Try to detect if region should be dumped by parsing smaps | |
1297 | counters. */ | |
1298 | for (line = strtok_r (NULL, "\n", &t); | |
1299 | line != NULL && line[0] >= 'A' && line[0] <= 'Z'; | |
1300 | line = strtok_r (NULL, "\n", &t)) | |
1301 | { | |
1302 | char keyword[64 + 1]; | |
1303 | ||
1304 | if (sscanf (line, "%64s", keyword) != 1) | |
1305 | { | |
1306 | warning (_("Error parsing {s,}maps file '%s'"), mapsfilename); | |
1307 | break; | |
1308 | } | |
1309 | ||
1310 | if (strcmp (keyword, "Anonymous:") == 0) | |
1311 | { | |
1312 | /* Older Linux kernels did not support the | |
1313 | "Anonymous:" counter. Check it here. */ | |
1314 | has_anonymous = 1; | |
1315 | } | |
1316 | else if (strcmp (keyword, "VmFlags:") == 0) | |
1317 | decode_vmflags (line, &v); | |
1318 | ||
1319 | if (strcmp (keyword, "AnonHugePages:") == 0 | |
1320 | || strcmp (keyword, "Anonymous:") == 0) | |
1321 | { | |
1322 | unsigned long number; | |
1323 | ||
1324 | if (sscanf (line, "%*s%lu", &number) != 1) | |
1325 | { | |
1326 | warning (_("Error parsing {s,}maps file '%s' number"), | |
1327 | mapsfilename); | |
1328 | break; | |
1329 | } | |
1330 | if (number > 0) | |
1331 | { | |
1332 | /* Even if we are dealing with a file-backed | |
1333 | mapping, if it contains anonymous pages we | |
1334 | consider it to be *also* an anonymous | |
1335 | mapping, because this is what the Linux | |
1336 | kernel does: | |
1337 | ||
1338 | // Dump segments that have been written to. | |
1339 | if (vma->anon_vma && FILTER(ANON_PRIVATE)) | |
1340 | goto whole; | |
1341 | ||
1342 | Note that if the mapping is already marked as | |
1343 | file-backed (i.e., mapping_file_p is | |
1344 | non-zero), then this is a special case, and | |
1345 | this mapping will be dumped either when the | |
1346 | user wants to dump file-backed *or* anonymous | |
1347 | mappings. */ | |
1348 | mapping_anon_p = 1; | |
1349 | } | |
1350 | } | |
1351 | } | |
1352 | ||
1353 | if (has_anonymous) | |
1354 | should_dump_p = dump_mapping_p (filterflags, &v, priv, | |
1355 | mapping_anon_p, mapping_file_p, | |
57e5e645 | 1356 | filename, addr, offset); |
db1ff28b JK |
1357 | else |
1358 | { | |
1359 | /* Older Linux kernels did not support the "Anonymous:" counter. | |
1360 | If it is missing, we can't be sure - dump all the pages. */ | |
1361 | should_dump_p = 1; | |
1362 | } | |
1363 | ||
1364 | /* Invoke the callback function to create the corefile segment. */ | |
1365 | if (should_dump_p) | |
1366 | func (addr, endaddr - addr, offset, inode, | |
1367 | read, write, exec, 1, /* MODIFIED is true because we | |
1368 | want to dump the mapping. */ | |
1369 | filename, obfd); | |
1370 | } | |
1371 | ||
db1ff28b JK |
1372 | return 0; |
1373 | } | |
1374 | ||
1375 | return 1; | |
1376 | } | |
1377 | ||
1378 | /* A structure for passing information through | |
1379 | linux_find_memory_regions_full. */ | |
1380 | ||
1381 | struct linux_find_memory_regions_data | |
1382 | { | |
1383 | /* The original callback. */ | |
1384 | ||
1385 | find_memory_region_ftype func; | |
1386 | ||
1387 | /* The original datum. */ | |
1388 | ||
1389 | void *obfd; | |
1390 | }; | |
1391 | ||
1392 | /* A callback for linux_find_memory_regions that converts between the | |
1393 | "full"-style callback and find_memory_region_ftype. */ | |
1394 | ||
1395 | static int | |
1396 | linux_find_memory_regions_thunk (ULONGEST vaddr, ULONGEST size, | |
1397 | ULONGEST offset, ULONGEST inode, | |
1398 | int read, int write, int exec, int modified, | |
1399 | const char *filename, void *arg) | |
1400 | { | |
9a3c8263 SM |
1401 | struct linux_find_memory_regions_data *data |
1402 | = (struct linux_find_memory_regions_data *) arg; | |
db1ff28b JK |
1403 | |
1404 | return data->func (vaddr, size, read, write, exec, modified, data->obfd); | |
451b7c33 TT |
1405 | } |
1406 | ||
1407 | /* A variant of linux_find_memory_regions_full that is suitable as the | |
1408 | gdbarch find_memory_regions method. */ | |
1409 | ||
1410 | static int | |
1411 | linux_find_memory_regions (struct gdbarch *gdbarch, | |
db1ff28b | 1412 | find_memory_region_ftype func, void *obfd) |
451b7c33 TT |
1413 | { |
1414 | struct linux_find_memory_regions_data data; | |
1415 | ||
1416 | data.func = func; | |
db1ff28b | 1417 | data.obfd = obfd; |
451b7c33 | 1418 | |
db1ff28b JK |
1419 | return linux_find_memory_regions_full (gdbarch, |
1420 | linux_find_memory_regions_thunk, | |
1421 | &data); | |
451b7c33 TT |
1422 | } |
1423 | ||
6432734d UW |
1424 | /* Determine which signal stopped execution. */ |
1425 | ||
1426 | static int | |
1427 | find_signalled_thread (struct thread_info *info, void *data) | |
1428 | { | |
a493e3e2 | 1429 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
e99b03dc | 1430 | && info->ptid.pid () == inferior_ptid.pid ()) |
6432734d UW |
1431 | return 1; |
1432 | ||
1433 | return 0; | |
1434 | } | |
1435 | ||
6432734d UW |
1436 | /* Generate corefile notes for SPU contexts. */ |
1437 | ||
1438 | static char * | |
1439 | linux_spu_make_corefile_notes (bfd *obfd, char *note_data, int *note_size) | |
1440 | { | |
1441 | static const char *spu_files[] = | |
1442 | { | |
1443 | "object-id", | |
1444 | "mem", | |
1445 | "regs", | |
1446 | "fpcr", | |
1447 | "lslr", | |
1448 | "decr", | |
1449 | "decr_status", | |
1450 | "signal1", | |
1451 | "signal1_type", | |
1452 | "signal2", | |
1453 | "signal2_type", | |
1454 | "event_mask", | |
1455 | "event_status", | |
1456 | "mbox_info", | |
1457 | "ibox_info", | |
1458 | "wbox_info", | |
1459 | "dma_info", | |
1460 | "proxydma_info", | |
1461 | }; | |
1462 | ||
f5656ead | 1463 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
6432734d UW |
1464 | |
1465 | /* Determine list of SPU ids. */ | |
9018be22 | 1466 | gdb::optional<gdb::byte_vector> |
8b88a78e PA |
1467 | spu_ids = target_read_alloc (current_top_target (), |
1468 | TARGET_OBJECT_SPU, NULL); | |
9018be22 SM |
1469 | |
1470 | if (!spu_ids) | |
07d28c77 | 1471 | return note_data; |
6432734d UW |
1472 | |
1473 | /* Generate corefile notes for each SPU file. */ | |
9018be22 | 1474 | for (size_t i = 0; i < spu_ids->size (); i += 4) |
6432734d | 1475 | { |
9018be22 | 1476 | int fd = extract_unsigned_integer (spu_ids->data () + i, 4, byte_order); |
6432734d | 1477 | |
9018be22 | 1478 | for (size_t j = 0; j < sizeof (spu_files) / sizeof (spu_files[0]); j++) |
6432734d UW |
1479 | { |
1480 | char annex[32], note_name[32]; | |
6432734d UW |
1481 | |
1482 | xsnprintf (annex, sizeof annex, "%d/%s", fd, spu_files[j]); | |
9018be22 | 1483 | gdb::optional<gdb::byte_vector> spu_data |
8b88a78e | 1484 | = target_read_alloc (current_top_target (), TARGET_OBJECT_SPU, annex); |
9018be22 SM |
1485 | |
1486 | if (spu_data && !spu_data->empty ()) | |
6432734d UW |
1487 | { |
1488 | xsnprintf (note_name, sizeof note_name, "SPU/%s", annex); | |
1489 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
1490 | note_name, NT_SPU, | |
9018be22 SM |
1491 | spu_data->data (), |
1492 | spu_data->size ()); | |
6432734d UW |
1493 | |
1494 | if (!note_data) | |
9018be22 | 1495 | return nullptr; |
6432734d UW |
1496 | } |
1497 | } | |
1498 | } | |
1499 | ||
6432734d UW |
1500 | return note_data; |
1501 | } | |
1502 | ||
451b7c33 TT |
1503 | /* This is used to pass information from |
1504 | linux_make_mappings_corefile_notes through | |
1505 | linux_find_memory_regions_full. */ | |
1506 | ||
1507 | struct linux_make_mappings_data | |
1508 | { | |
1509 | /* Number of files mapped. */ | |
1510 | ULONGEST file_count; | |
1511 | ||
1512 | /* The obstack for the main part of the data. */ | |
1513 | struct obstack *data_obstack; | |
1514 | ||
1515 | /* The filename obstack. */ | |
1516 | struct obstack *filename_obstack; | |
1517 | ||
1518 | /* The architecture's "long" type. */ | |
1519 | struct type *long_type; | |
1520 | }; | |
1521 | ||
1522 | static linux_find_memory_region_ftype linux_make_mappings_callback; | |
1523 | ||
1524 | /* A callback for linux_find_memory_regions_full that updates the | |
1525 | mappings data for linux_make_mappings_corefile_notes. */ | |
1526 | ||
1527 | static int | |
1528 | linux_make_mappings_callback (ULONGEST vaddr, ULONGEST size, | |
1529 | ULONGEST offset, ULONGEST inode, | |
1530 | int read, int write, int exec, int modified, | |
1531 | const char *filename, void *data) | |
1532 | { | |
9a3c8263 SM |
1533 | struct linux_make_mappings_data *map_data |
1534 | = (struct linux_make_mappings_data *) data; | |
451b7c33 TT |
1535 | gdb_byte buf[sizeof (ULONGEST)]; |
1536 | ||
1537 | if (*filename == '\0' || inode == 0) | |
1538 | return 0; | |
1539 | ||
1540 | ++map_data->file_count; | |
1541 | ||
1542 | pack_long (buf, map_data->long_type, vaddr); | |
1543 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1544 | pack_long (buf, map_data->long_type, vaddr + size); | |
1545 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1546 | pack_long (buf, map_data->long_type, offset); | |
1547 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1548 | ||
1549 | obstack_grow_str0 (map_data->filename_obstack, filename); | |
1550 | ||
1551 | return 0; | |
1552 | } | |
1553 | ||
1554 | /* Write the file mapping data to the core file, if possible. OBFD is | |
1555 | the output BFD. NOTE_DATA is the current note data, and NOTE_SIZE | |
1556 | is a pointer to the note size. Returns the new NOTE_DATA and | |
1557 | updates NOTE_SIZE. */ | |
1558 | ||
1559 | static char * | |
1560 | linux_make_mappings_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, | |
1561 | char *note_data, int *note_size) | |
1562 | { | |
451b7c33 TT |
1563 | struct linux_make_mappings_data mapping_data; |
1564 | struct type *long_type | |
1565 | = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), 0, "long"); | |
1566 | gdb_byte buf[sizeof (ULONGEST)]; | |
1567 | ||
8268c778 | 1568 | auto_obstack data_obstack, filename_obstack; |
451b7c33 TT |
1569 | |
1570 | mapping_data.file_count = 0; | |
1571 | mapping_data.data_obstack = &data_obstack; | |
1572 | mapping_data.filename_obstack = &filename_obstack; | |
1573 | mapping_data.long_type = long_type; | |
1574 | ||
1575 | /* Reserve space for the count. */ | |
1576 | obstack_blank (&data_obstack, TYPE_LENGTH (long_type)); | |
1577 | /* We always write the page size as 1 since we have no good way to | |
1578 | determine the correct value. */ | |
1579 | pack_long (buf, long_type, 1); | |
1580 | obstack_grow (&data_obstack, buf, TYPE_LENGTH (long_type)); | |
1581 | ||
db1ff28b JK |
1582 | linux_find_memory_regions_full (gdbarch, linux_make_mappings_callback, |
1583 | &mapping_data); | |
451b7c33 TT |
1584 | |
1585 | if (mapping_data.file_count != 0) | |
1586 | { | |
1587 | /* Write the count to the obstack. */ | |
51a5cd90 PA |
1588 | pack_long ((gdb_byte *) obstack_base (&data_obstack), |
1589 | long_type, mapping_data.file_count); | |
451b7c33 TT |
1590 | |
1591 | /* Copy the filenames to the data obstack. */ | |
3fba72f7 | 1592 | int size = obstack_object_size (&filename_obstack); |
451b7c33 | 1593 | obstack_grow (&data_obstack, obstack_base (&filename_obstack), |
3fba72f7 | 1594 | size); |
451b7c33 TT |
1595 | |
1596 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
1597 | "CORE", NT_FILE, | |
1598 | obstack_base (&data_obstack), | |
1599 | obstack_object_size (&data_obstack)); | |
1600 | } | |
1601 | ||
451b7c33 TT |
1602 | return note_data; |
1603 | } | |
1604 | ||
5aa82d05 AA |
1605 | /* Structure for passing information from |
1606 | linux_collect_thread_registers via an iterator to | |
1607 | linux_collect_regset_section_cb. */ | |
1608 | ||
1609 | struct linux_collect_regset_section_cb_data | |
1610 | { | |
1611 | struct gdbarch *gdbarch; | |
1612 | const struct regcache *regcache; | |
1613 | bfd *obfd; | |
1614 | char *note_data; | |
1615 | int *note_size; | |
1616 | unsigned long lwp; | |
1617 | enum gdb_signal stop_signal; | |
1618 | int abort_iteration; | |
1619 | }; | |
1620 | ||
1621 | /* Callback for iterate_over_regset_sections that records a single | |
1622 | regset in the corefile note section. */ | |
1623 | ||
1624 | static void | |
a616bb94 AH |
1625 | linux_collect_regset_section_cb (const char *sect_name, int supply_size, |
1626 | int collect_size, const struct regset *regset, | |
5aa82d05 AA |
1627 | const char *human_name, void *cb_data) |
1628 | { | |
7567e115 SM |
1629 | struct linux_collect_regset_section_cb_data *data |
1630 | = (struct linux_collect_regset_section_cb_data *) cb_data; | |
a616bb94 AH |
1631 | bool variable_size_section = (regset != NULL |
1632 | && regset->flags & REGSET_VARIABLE_SIZE); | |
1633 | ||
1634 | if (!variable_size_section) | |
1635 | gdb_assert (supply_size == collect_size); | |
5aa82d05 AA |
1636 | |
1637 | if (data->abort_iteration) | |
1638 | return; | |
1639 | ||
5aa82d05 AA |
1640 | gdb_assert (regset && regset->collect_regset); |
1641 | ||
afde3032 PFC |
1642 | /* This is intentionally zero-initialized by using std::vector, so |
1643 | that any padding bytes in the core file will show as 0. */ | |
1644 | std::vector<gdb_byte> buf (collect_size); | |
1645 | ||
1646 | regset->collect_regset (regset, data->regcache, -1, buf.data (), | |
1647 | collect_size); | |
5aa82d05 AA |
1648 | |
1649 | /* PRSTATUS still needs to be treated specially. */ | |
1650 | if (strcmp (sect_name, ".reg") == 0) | |
1651 | data->note_data = (char *) elfcore_write_prstatus | |
1652 | (data->obfd, data->note_data, data->note_size, data->lwp, | |
afde3032 | 1653 | gdb_signal_to_host (data->stop_signal), buf.data ()); |
5aa82d05 AA |
1654 | else |
1655 | data->note_data = (char *) elfcore_write_register_note | |
1656 | (data->obfd, data->note_data, data->note_size, | |
afde3032 | 1657 | sect_name, buf.data (), collect_size); |
5aa82d05 AA |
1658 | |
1659 | if (data->note_data == NULL) | |
1660 | data->abort_iteration = 1; | |
1661 | } | |
1662 | ||
6432734d UW |
1663 | /* Records the thread's register state for the corefile note |
1664 | section. */ | |
1665 | ||
1666 | static char * | |
1667 | linux_collect_thread_registers (const struct regcache *regcache, | |
1668 | ptid_t ptid, bfd *obfd, | |
1669 | char *note_data, int *note_size, | |
2ea28649 | 1670 | enum gdb_signal stop_signal) |
6432734d | 1671 | { |
ac7936df | 1672 | struct gdbarch *gdbarch = regcache->arch (); |
5aa82d05 | 1673 | struct linux_collect_regset_section_cb_data data; |
6432734d | 1674 | |
5aa82d05 AA |
1675 | data.gdbarch = gdbarch; |
1676 | data.regcache = regcache; | |
1677 | data.obfd = obfd; | |
1678 | data.note_data = note_data; | |
1679 | data.note_size = note_size; | |
1680 | data.stop_signal = stop_signal; | |
1681 | data.abort_iteration = 0; | |
6432734d UW |
1682 | |
1683 | /* For remote targets the LWP may not be available, so use the TID. */ | |
e38504b3 | 1684 | data.lwp = ptid.lwp (); |
5aa82d05 | 1685 | if (!data.lwp) |
cc6bcb54 | 1686 | data.lwp = ptid.tid (); |
5aa82d05 AA |
1687 | |
1688 | gdbarch_iterate_over_regset_sections (gdbarch, | |
1689 | linux_collect_regset_section_cb, | |
1690 | &data, regcache); | |
1691 | return data.note_data; | |
6432734d UW |
1692 | } |
1693 | ||
2989a365 | 1694 | /* Fetch the siginfo data for the specified thread, if it exists. If |
9f584b37 TT |
1695 | there is no data, or we could not read it, return an empty |
1696 | buffer. */ | |
1697 | ||
1698 | static gdb::byte_vector | |
1699 | linux_get_siginfo_data (thread_info *thread, struct gdbarch *gdbarch) | |
9015683b TT |
1700 | { |
1701 | struct type *siginfo_type; | |
9015683b | 1702 | LONGEST bytes_read; |
9015683b TT |
1703 | |
1704 | if (!gdbarch_get_siginfo_type_p (gdbarch)) | |
9f584b37 TT |
1705 | return gdb::byte_vector (); |
1706 | ||
2989a365 TT |
1707 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
1708 | inferior_ptid = thread->ptid; | |
1709 | ||
9015683b TT |
1710 | siginfo_type = gdbarch_get_siginfo_type (gdbarch); |
1711 | ||
9f584b37 | 1712 | gdb::byte_vector buf (TYPE_LENGTH (siginfo_type)); |
9015683b | 1713 | |
8b88a78e | 1714 | bytes_read = target_read (current_top_target (), TARGET_OBJECT_SIGNAL_INFO, NULL, |
9f584b37 TT |
1715 | buf.data (), 0, TYPE_LENGTH (siginfo_type)); |
1716 | if (bytes_read != TYPE_LENGTH (siginfo_type)) | |
1717 | buf.clear (); | |
9015683b TT |
1718 | |
1719 | return buf; | |
1720 | } | |
1721 | ||
6432734d UW |
1722 | struct linux_corefile_thread_data |
1723 | { | |
1724 | struct gdbarch *gdbarch; | |
6432734d UW |
1725 | bfd *obfd; |
1726 | char *note_data; | |
1727 | int *note_size; | |
2ea28649 | 1728 | enum gdb_signal stop_signal; |
6432734d UW |
1729 | }; |
1730 | ||
050c224b PA |
1731 | /* Records the thread's register state for the corefile note |
1732 | section. */ | |
6432734d | 1733 | |
050c224b PA |
1734 | static void |
1735 | linux_corefile_thread (struct thread_info *info, | |
1736 | struct linux_corefile_thread_data *args) | |
6432734d | 1737 | { |
050c224b | 1738 | struct regcache *regcache; |
050c224b PA |
1739 | |
1740 | regcache = get_thread_arch_regcache (info->ptid, args->gdbarch); | |
1741 | ||
050c224b | 1742 | target_fetch_registers (regcache, -1); |
9f584b37 | 1743 | gdb::byte_vector siginfo_data = linux_get_siginfo_data (info, args->gdbarch); |
050c224b PA |
1744 | |
1745 | args->note_data = linux_collect_thread_registers | |
1746 | (regcache, info->ptid, args->obfd, args->note_data, | |
1747 | args->note_size, args->stop_signal); | |
1748 | ||
1749 | /* Don't return anything if we got no register information above, | |
1750 | such a core file is useless. */ | |
1751 | if (args->note_data != NULL) | |
9f584b37 | 1752 | if (!siginfo_data.empty ()) |
050c224b PA |
1753 | args->note_data = elfcore_write_note (args->obfd, |
1754 | args->note_data, | |
1755 | args->note_size, | |
1756 | "CORE", NT_SIGINFO, | |
9f584b37 TT |
1757 | siginfo_data.data (), |
1758 | siginfo_data.size ()); | |
6432734d UW |
1759 | } |
1760 | ||
b3ac9c77 SDJ |
1761 | /* Fill the PRPSINFO structure with information about the process being |
1762 | debugged. Returns 1 in case of success, 0 for failures. Please note that | |
1763 | even if the structure cannot be entirely filled (e.g., GDB was unable to | |
1764 | gather information about the process UID/GID), this function will still | |
1765 | return 1 since some information was already recorded. It will only return | |
1766 | 0 iff nothing can be gathered. */ | |
1767 | ||
1768 | static int | |
1769 | linux_fill_prpsinfo (struct elf_internal_linux_prpsinfo *p) | |
1770 | { | |
1771 | /* The filename which we will use to obtain some info about the process. | |
1772 | We will basically use this to store the `/proc/PID/FILENAME' file. */ | |
1773 | char filename[100]; | |
b3ac9c77 SDJ |
1774 | /* The basename of the executable. */ |
1775 | const char *basename; | |
cbaaa0ca | 1776 | const char *infargs; |
b3ac9c77 SDJ |
1777 | /* Temporary buffer. */ |
1778 | char *tmpstr; | |
1779 | /* The valid states of a process, according to the Linux kernel. */ | |
1780 | const char valid_states[] = "RSDTZW"; | |
1781 | /* The program state. */ | |
1782 | const char *prog_state; | |
1783 | /* The state of the process. */ | |
1784 | char pr_sname; | |
1785 | /* The PID of the program which generated the corefile. */ | |
1786 | pid_t pid; | |
1787 | /* Process flags. */ | |
1788 | unsigned int pr_flag; | |
1789 | /* Process nice value. */ | |
1790 | long pr_nice; | |
1791 | /* The number of fields read by `sscanf'. */ | |
1792 | int n_fields = 0; | |
b3ac9c77 SDJ |
1793 | |
1794 | gdb_assert (p != NULL); | |
1795 | ||
1796 | /* Obtaining PID and filename. */ | |
e99b03dc | 1797 | pid = inferior_ptid.pid (); |
b3ac9c77 | 1798 | xsnprintf (filename, sizeof (filename), "/proc/%d/cmdline", (int) pid); |
87028b87 TT |
1799 | /* The full name of the program which generated the corefile. */ |
1800 | gdb::unique_xmalloc_ptr<char> fname | |
1801 | = target_fileio_read_stralloc (NULL, filename); | |
b3ac9c77 | 1802 | |
87028b87 | 1803 | if (fname == NULL || fname.get ()[0] == '\0') |
b3ac9c77 SDJ |
1804 | { |
1805 | /* No program name was read, so we won't be able to retrieve more | |
1806 | information about the process. */ | |
b3ac9c77 SDJ |
1807 | return 0; |
1808 | } | |
1809 | ||
b3ac9c77 SDJ |
1810 | memset (p, 0, sizeof (*p)); |
1811 | ||
1812 | /* Defining the PID. */ | |
1813 | p->pr_pid = pid; | |
1814 | ||
1815 | /* Copying the program name. Only the basename matters. */ | |
87028b87 | 1816 | basename = lbasename (fname.get ()); |
b3ac9c77 SDJ |
1817 | strncpy (p->pr_fname, basename, sizeof (p->pr_fname)); |
1818 | p->pr_fname[sizeof (p->pr_fname) - 1] = '\0'; | |
1819 | ||
1820 | infargs = get_inferior_args (); | |
1821 | ||
87028b87 TT |
1822 | /* The arguments of the program. */ |
1823 | std::string psargs = fname.get (); | |
b3ac9c77 | 1824 | if (infargs != NULL) |
87028b87 | 1825 | psargs = psargs + " " + infargs; |
b3ac9c77 | 1826 | |
87028b87 | 1827 | strncpy (p->pr_psargs, psargs.c_str (), sizeof (p->pr_psargs)); |
b3ac9c77 SDJ |
1828 | p->pr_psargs[sizeof (p->pr_psargs) - 1] = '\0'; |
1829 | ||
1830 | xsnprintf (filename, sizeof (filename), "/proc/%d/stat", (int) pid); | |
87028b87 TT |
1831 | /* The contents of `/proc/PID/stat'. */ |
1832 | gdb::unique_xmalloc_ptr<char> proc_stat_contents | |
1833 | = target_fileio_read_stralloc (NULL, filename); | |
1834 | char *proc_stat = proc_stat_contents.get (); | |
b3ac9c77 SDJ |
1835 | |
1836 | if (proc_stat == NULL || *proc_stat == '\0') | |
1837 | { | |
1838 | /* Despite being unable to read more information about the | |
1839 | process, we return 1 here because at least we have its | |
1840 | command line, PID and arguments. */ | |
b3ac9c77 SDJ |
1841 | return 1; |
1842 | } | |
1843 | ||
1844 | /* Ok, we have the stats. It's time to do a little parsing of the | |
1845 | contents of the buffer, so that we end up reading what we want. | |
1846 | ||
1847 | The following parsing mechanism is strongly based on the | |
1848 | information generated by the `fs/proc/array.c' file, present in | |
1849 | the Linux kernel tree. More details about how the information is | |
1850 | displayed can be obtained by seeing the manpage of proc(5), | |
1851 | specifically under the entry of `/proc/[pid]/stat'. */ | |
1852 | ||
1853 | /* Getting rid of the PID, since we already have it. */ | |
1854 | while (isdigit (*proc_stat)) | |
1855 | ++proc_stat; | |
1856 | ||
1857 | proc_stat = skip_spaces (proc_stat); | |
1858 | ||
184cd072 JK |
1859 | /* ps command also relies on no trailing fields ever contain ')'. */ |
1860 | proc_stat = strrchr (proc_stat, ')'); | |
1861 | if (proc_stat == NULL) | |
87028b87 | 1862 | return 1; |
184cd072 | 1863 | proc_stat++; |
b3ac9c77 SDJ |
1864 | |
1865 | proc_stat = skip_spaces (proc_stat); | |
1866 | ||
1867 | n_fields = sscanf (proc_stat, | |
1868 | "%c" /* Process state. */ | |
1869 | "%d%d%d" /* Parent PID, group ID, session ID. */ | |
1870 | "%*d%*d" /* tty_nr, tpgid (not used). */ | |
1871 | "%u" /* Flags. */ | |
1872 | "%*s%*s%*s%*s" /* minflt, cminflt, majflt, | |
1873 | cmajflt (not used). */ | |
1874 | "%*s%*s%*s%*s" /* utime, stime, cutime, | |
1875 | cstime (not used). */ | |
1876 | "%*s" /* Priority (not used). */ | |
1877 | "%ld", /* Nice. */ | |
1878 | &pr_sname, | |
1879 | &p->pr_ppid, &p->pr_pgrp, &p->pr_sid, | |
1880 | &pr_flag, | |
1881 | &pr_nice); | |
1882 | ||
1883 | if (n_fields != 6) | |
1884 | { | |
1885 | /* Again, we couldn't read the complementary information about | |
1886 | the process state. However, we already have minimal | |
1887 | information, so we just return 1 here. */ | |
b3ac9c77 SDJ |
1888 | return 1; |
1889 | } | |
1890 | ||
1891 | /* Filling the structure fields. */ | |
1892 | prog_state = strchr (valid_states, pr_sname); | |
1893 | if (prog_state != NULL) | |
1894 | p->pr_state = prog_state - valid_states; | |
1895 | else | |
1896 | { | |
1897 | /* Zero means "Running". */ | |
1898 | p->pr_state = 0; | |
1899 | } | |
1900 | ||
1901 | p->pr_sname = p->pr_state > 5 ? '.' : pr_sname; | |
1902 | p->pr_zomb = p->pr_sname == 'Z'; | |
1903 | p->pr_nice = pr_nice; | |
1904 | p->pr_flag = pr_flag; | |
1905 | ||
1906 | /* Finally, obtaining the UID and GID. For that, we read and parse the | |
1907 | contents of the `/proc/PID/status' file. */ | |
1908 | xsnprintf (filename, sizeof (filename), "/proc/%d/status", (int) pid); | |
87028b87 TT |
1909 | /* The contents of `/proc/PID/status'. */ |
1910 | gdb::unique_xmalloc_ptr<char> proc_status_contents | |
1911 | = target_fileio_read_stralloc (NULL, filename); | |
1912 | char *proc_status = proc_status_contents.get (); | |
b3ac9c77 SDJ |
1913 | |
1914 | if (proc_status == NULL || *proc_status == '\0') | |
1915 | { | |
1916 | /* Returning 1 since we already have a bunch of information. */ | |
b3ac9c77 SDJ |
1917 | return 1; |
1918 | } | |
1919 | ||
1920 | /* Extracting the UID. */ | |
1921 | tmpstr = strstr (proc_status, "Uid:"); | |
1922 | if (tmpstr != NULL) | |
1923 | { | |
1924 | /* Advancing the pointer to the beginning of the UID. */ | |
1925 | tmpstr += sizeof ("Uid:"); | |
1926 | while (*tmpstr != '\0' && !isdigit (*tmpstr)) | |
1927 | ++tmpstr; | |
1928 | ||
1929 | if (isdigit (*tmpstr)) | |
1930 | p->pr_uid = strtol (tmpstr, &tmpstr, 10); | |
1931 | } | |
1932 | ||
1933 | /* Extracting the GID. */ | |
1934 | tmpstr = strstr (proc_status, "Gid:"); | |
1935 | if (tmpstr != NULL) | |
1936 | { | |
1937 | /* Advancing the pointer to the beginning of the GID. */ | |
1938 | tmpstr += sizeof ("Gid:"); | |
1939 | while (*tmpstr != '\0' && !isdigit (*tmpstr)) | |
1940 | ++tmpstr; | |
1941 | ||
1942 | if (isdigit (*tmpstr)) | |
1943 | p->pr_gid = strtol (tmpstr, &tmpstr, 10); | |
1944 | } | |
1945 | ||
b3ac9c77 SDJ |
1946 | return 1; |
1947 | } | |
1948 | ||
f968fe80 AA |
1949 | /* Build the note section for a corefile, and return it in a malloc |
1950 | buffer. */ | |
6432734d | 1951 | |
f968fe80 AA |
1952 | static char * |
1953 | linux_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size) | |
6432734d UW |
1954 | { |
1955 | struct linux_corefile_thread_data thread_args; | |
b3ac9c77 | 1956 | struct elf_internal_linux_prpsinfo prpsinfo; |
6432734d | 1957 | char *note_data = NULL; |
08036331 | 1958 | struct thread_info *curr_thr, *signalled_thr; |
6432734d | 1959 | |
f968fe80 AA |
1960 | if (! gdbarch_iterate_over_regset_sections_p (gdbarch)) |
1961 | return NULL; | |
1962 | ||
b3ac9c77 | 1963 | if (linux_fill_prpsinfo (&prpsinfo)) |
6432734d | 1964 | { |
fe220226 MR |
1965 | if (gdbarch_ptr_bit (gdbarch) == 64) |
1966 | note_data = elfcore_write_linux_prpsinfo64 (obfd, | |
1967 | note_data, note_size, | |
1968 | &prpsinfo); | |
b3ac9c77 | 1969 | else |
fe220226 MR |
1970 | note_data = elfcore_write_linux_prpsinfo32 (obfd, |
1971 | note_data, note_size, | |
1972 | &prpsinfo); | |
6432734d UW |
1973 | } |
1974 | ||
1975 | /* Thread register information. */ | |
a70b8144 | 1976 | try |
22fd09ae JK |
1977 | { |
1978 | update_thread_list (); | |
1979 | } | |
230d2906 | 1980 | catch (const gdb_exception_error &e) |
492d29ea PA |
1981 | { |
1982 | exception_print (gdb_stderr, e); | |
1983 | } | |
492d29ea | 1984 | |
050c224b PA |
1985 | /* Like the kernel, prefer dumping the signalled thread first. |
1986 | "First thread" is what tools use to infer the signalled thread. | |
1987 | In case there's more than one signalled thread, prefer the | |
1988 | current thread, if it is signalled. */ | |
1989 | curr_thr = inferior_thread (); | |
1990 | if (curr_thr->suspend.stop_signal != GDB_SIGNAL_0) | |
1991 | signalled_thr = curr_thr; | |
1992 | else | |
1993 | { | |
1994 | signalled_thr = iterate_over_threads (find_signalled_thread, NULL); | |
1995 | if (signalled_thr == NULL) | |
1996 | signalled_thr = curr_thr; | |
1997 | } | |
1998 | ||
6432734d | 1999 | thread_args.gdbarch = gdbarch; |
6432734d UW |
2000 | thread_args.obfd = obfd; |
2001 | thread_args.note_data = note_data; | |
2002 | thread_args.note_size = note_size; | |
050c224b PA |
2003 | thread_args.stop_signal = signalled_thr->suspend.stop_signal; |
2004 | ||
2005 | linux_corefile_thread (signalled_thr, &thread_args); | |
08036331 | 2006 | for (thread_info *thr : current_inferior ()->non_exited_threads ()) |
050c224b PA |
2007 | { |
2008 | if (thr == signalled_thr) | |
2009 | continue; | |
050c224b PA |
2010 | |
2011 | linux_corefile_thread (thr, &thread_args); | |
2012 | } | |
2013 | ||
6432734d UW |
2014 | note_data = thread_args.note_data; |
2015 | if (!note_data) | |
2016 | return NULL; | |
2017 | ||
2018 | /* Auxillary vector. */ | |
9018be22 | 2019 | gdb::optional<gdb::byte_vector> auxv = |
8b88a78e | 2020 | target_read_alloc (current_top_target (), TARGET_OBJECT_AUXV, NULL); |
9018be22 | 2021 | if (auxv && !auxv->empty ()) |
6432734d UW |
2022 | { |
2023 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
9018be22 SM |
2024 | "CORE", NT_AUXV, auxv->data (), |
2025 | auxv->size ()); | |
6432734d UW |
2026 | |
2027 | if (!note_data) | |
2028 | return NULL; | |
2029 | } | |
2030 | ||
2031 | /* SPU information. */ | |
2032 | note_data = linux_spu_make_corefile_notes (obfd, note_data, note_size); | |
2033 | if (!note_data) | |
2034 | return NULL; | |
2035 | ||
451b7c33 TT |
2036 | /* File mappings. */ |
2037 | note_data = linux_make_mappings_corefile_notes (gdbarch, obfd, | |
2038 | note_data, note_size); | |
2039 | ||
6432734d UW |
2040 | return note_data; |
2041 | } | |
2042 | ||
eb14d406 SDJ |
2043 | /* Implementation of `gdbarch_gdb_signal_from_target', as defined in |
2044 | gdbarch.h. This function is not static because it is exported to | |
2045 | other -tdep files. */ | |
2046 | ||
2047 | enum gdb_signal | |
2048 | linux_gdb_signal_from_target (struct gdbarch *gdbarch, int signal) | |
2049 | { | |
2050 | switch (signal) | |
2051 | { | |
2052 | case 0: | |
2053 | return GDB_SIGNAL_0; | |
2054 | ||
2055 | case LINUX_SIGHUP: | |
2056 | return GDB_SIGNAL_HUP; | |
2057 | ||
2058 | case LINUX_SIGINT: | |
2059 | return GDB_SIGNAL_INT; | |
2060 | ||
2061 | case LINUX_SIGQUIT: | |
2062 | return GDB_SIGNAL_QUIT; | |
2063 | ||
2064 | case LINUX_SIGILL: | |
2065 | return GDB_SIGNAL_ILL; | |
2066 | ||
2067 | case LINUX_SIGTRAP: | |
2068 | return GDB_SIGNAL_TRAP; | |
2069 | ||
2070 | case LINUX_SIGABRT: | |
2071 | return GDB_SIGNAL_ABRT; | |
2072 | ||
2073 | case LINUX_SIGBUS: | |
2074 | return GDB_SIGNAL_BUS; | |
2075 | ||
2076 | case LINUX_SIGFPE: | |
2077 | return GDB_SIGNAL_FPE; | |
2078 | ||
2079 | case LINUX_SIGKILL: | |
2080 | return GDB_SIGNAL_KILL; | |
2081 | ||
2082 | case LINUX_SIGUSR1: | |
2083 | return GDB_SIGNAL_USR1; | |
2084 | ||
2085 | case LINUX_SIGSEGV: | |
2086 | return GDB_SIGNAL_SEGV; | |
2087 | ||
2088 | case LINUX_SIGUSR2: | |
2089 | return GDB_SIGNAL_USR2; | |
2090 | ||
2091 | case LINUX_SIGPIPE: | |
2092 | return GDB_SIGNAL_PIPE; | |
2093 | ||
2094 | case LINUX_SIGALRM: | |
2095 | return GDB_SIGNAL_ALRM; | |
2096 | ||
2097 | case LINUX_SIGTERM: | |
2098 | return GDB_SIGNAL_TERM; | |
2099 | ||
2100 | case LINUX_SIGCHLD: | |
2101 | return GDB_SIGNAL_CHLD; | |
2102 | ||
2103 | case LINUX_SIGCONT: | |
2104 | return GDB_SIGNAL_CONT; | |
2105 | ||
2106 | case LINUX_SIGSTOP: | |
2107 | return GDB_SIGNAL_STOP; | |
2108 | ||
2109 | case LINUX_SIGTSTP: | |
2110 | return GDB_SIGNAL_TSTP; | |
2111 | ||
2112 | case LINUX_SIGTTIN: | |
2113 | return GDB_SIGNAL_TTIN; | |
2114 | ||
2115 | case LINUX_SIGTTOU: | |
2116 | return GDB_SIGNAL_TTOU; | |
2117 | ||
2118 | case LINUX_SIGURG: | |
2119 | return GDB_SIGNAL_URG; | |
2120 | ||
2121 | case LINUX_SIGXCPU: | |
2122 | return GDB_SIGNAL_XCPU; | |
2123 | ||
2124 | case LINUX_SIGXFSZ: | |
2125 | return GDB_SIGNAL_XFSZ; | |
2126 | ||
2127 | case LINUX_SIGVTALRM: | |
2128 | return GDB_SIGNAL_VTALRM; | |
2129 | ||
2130 | case LINUX_SIGPROF: | |
2131 | return GDB_SIGNAL_PROF; | |
2132 | ||
2133 | case LINUX_SIGWINCH: | |
2134 | return GDB_SIGNAL_WINCH; | |
2135 | ||
2136 | /* No way to differentiate between SIGIO and SIGPOLL. | |
2137 | Therefore, we just handle the first one. */ | |
2138 | case LINUX_SIGIO: | |
2139 | return GDB_SIGNAL_IO; | |
2140 | ||
2141 | case LINUX_SIGPWR: | |
2142 | return GDB_SIGNAL_PWR; | |
2143 | ||
2144 | case LINUX_SIGSYS: | |
2145 | return GDB_SIGNAL_SYS; | |
2146 | ||
2147 | /* SIGRTMIN and SIGRTMAX are not continuous in <gdb/signals.def>, | |
2148 | therefore we have to handle them here. */ | |
2149 | case LINUX_SIGRTMIN: | |
2150 | return GDB_SIGNAL_REALTIME_32; | |
2151 | ||
2152 | case LINUX_SIGRTMAX: | |
2153 | return GDB_SIGNAL_REALTIME_64; | |
2154 | } | |
2155 | ||
2156 | if (signal >= LINUX_SIGRTMIN + 1 && signal <= LINUX_SIGRTMAX - 1) | |
2157 | { | |
2158 | int offset = signal - LINUX_SIGRTMIN + 1; | |
2159 | ||
2160 | return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_33 + offset); | |
2161 | } | |
2162 | ||
2163 | return GDB_SIGNAL_UNKNOWN; | |
2164 | } | |
2165 | ||
2166 | /* Implementation of `gdbarch_gdb_signal_to_target', as defined in | |
2167 | gdbarch.h. This function is not static because it is exported to | |
2168 | other -tdep files. */ | |
2169 | ||
2170 | int | |
2171 | linux_gdb_signal_to_target (struct gdbarch *gdbarch, | |
2172 | enum gdb_signal signal) | |
2173 | { | |
2174 | switch (signal) | |
2175 | { | |
2176 | case GDB_SIGNAL_0: | |
2177 | return 0; | |
2178 | ||
2179 | case GDB_SIGNAL_HUP: | |
2180 | return LINUX_SIGHUP; | |
2181 | ||
2182 | case GDB_SIGNAL_INT: | |
2183 | return LINUX_SIGINT; | |
2184 | ||
2185 | case GDB_SIGNAL_QUIT: | |
2186 | return LINUX_SIGQUIT; | |
2187 | ||
2188 | case GDB_SIGNAL_ILL: | |
2189 | return LINUX_SIGILL; | |
2190 | ||
2191 | case GDB_SIGNAL_TRAP: | |
2192 | return LINUX_SIGTRAP; | |
2193 | ||
2194 | case GDB_SIGNAL_ABRT: | |
2195 | return LINUX_SIGABRT; | |
2196 | ||
2197 | case GDB_SIGNAL_FPE: | |
2198 | return LINUX_SIGFPE; | |
2199 | ||
2200 | case GDB_SIGNAL_KILL: | |
2201 | return LINUX_SIGKILL; | |
2202 | ||
2203 | case GDB_SIGNAL_BUS: | |
2204 | return LINUX_SIGBUS; | |
2205 | ||
2206 | case GDB_SIGNAL_SEGV: | |
2207 | return LINUX_SIGSEGV; | |
2208 | ||
2209 | case GDB_SIGNAL_SYS: | |
2210 | return LINUX_SIGSYS; | |
2211 | ||
2212 | case GDB_SIGNAL_PIPE: | |
2213 | return LINUX_SIGPIPE; | |
2214 | ||
2215 | case GDB_SIGNAL_ALRM: | |
2216 | return LINUX_SIGALRM; | |
2217 | ||
2218 | case GDB_SIGNAL_TERM: | |
2219 | return LINUX_SIGTERM; | |
2220 | ||
2221 | case GDB_SIGNAL_URG: | |
2222 | return LINUX_SIGURG; | |
2223 | ||
2224 | case GDB_SIGNAL_STOP: | |
2225 | return LINUX_SIGSTOP; | |
2226 | ||
2227 | case GDB_SIGNAL_TSTP: | |
2228 | return LINUX_SIGTSTP; | |
2229 | ||
2230 | case GDB_SIGNAL_CONT: | |
2231 | return LINUX_SIGCONT; | |
2232 | ||
2233 | case GDB_SIGNAL_CHLD: | |
2234 | return LINUX_SIGCHLD; | |
2235 | ||
2236 | case GDB_SIGNAL_TTIN: | |
2237 | return LINUX_SIGTTIN; | |
2238 | ||
2239 | case GDB_SIGNAL_TTOU: | |
2240 | return LINUX_SIGTTOU; | |
2241 | ||
2242 | case GDB_SIGNAL_IO: | |
2243 | return LINUX_SIGIO; | |
2244 | ||
2245 | case GDB_SIGNAL_XCPU: | |
2246 | return LINUX_SIGXCPU; | |
2247 | ||
2248 | case GDB_SIGNAL_XFSZ: | |
2249 | return LINUX_SIGXFSZ; | |
2250 | ||
2251 | case GDB_SIGNAL_VTALRM: | |
2252 | return LINUX_SIGVTALRM; | |
2253 | ||
2254 | case GDB_SIGNAL_PROF: | |
2255 | return LINUX_SIGPROF; | |
2256 | ||
2257 | case GDB_SIGNAL_WINCH: | |
2258 | return LINUX_SIGWINCH; | |
2259 | ||
2260 | case GDB_SIGNAL_USR1: | |
2261 | return LINUX_SIGUSR1; | |
2262 | ||
2263 | case GDB_SIGNAL_USR2: | |
2264 | return LINUX_SIGUSR2; | |
2265 | ||
2266 | case GDB_SIGNAL_PWR: | |
2267 | return LINUX_SIGPWR; | |
2268 | ||
2269 | case GDB_SIGNAL_POLL: | |
2270 | return LINUX_SIGPOLL; | |
2271 | ||
2272 | /* GDB_SIGNAL_REALTIME_32 is not continuous in <gdb/signals.def>, | |
2273 | therefore we have to handle it here. */ | |
2274 | case GDB_SIGNAL_REALTIME_32: | |
2275 | return LINUX_SIGRTMIN; | |
2276 | ||
2277 | /* Same comment applies to _64. */ | |
2278 | case GDB_SIGNAL_REALTIME_64: | |
2279 | return LINUX_SIGRTMAX; | |
2280 | } | |
2281 | ||
2282 | /* GDB_SIGNAL_REALTIME_33 to _64 are continuous. */ | |
2283 | if (signal >= GDB_SIGNAL_REALTIME_33 | |
2284 | && signal <= GDB_SIGNAL_REALTIME_63) | |
2285 | { | |
2286 | int offset = signal - GDB_SIGNAL_REALTIME_33; | |
2287 | ||
2288 | return LINUX_SIGRTMIN + 1 + offset; | |
2289 | } | |
2290 | ||
2291 | return -1; | |
2292 | } | |
2293 | ||
cdfa0b0a PA |
2294 | /* Helper for linux_vsyscall_range that does the real work of finding |
2295 | the vsyscall's address range. */ | |
3437254d PA |
2296 | |
2297 | static int | |
cdfa0b0a | 2298 | linux_vsyscall_range_raw (struct gdbarch *gdbarch, struct mem_range *range) |
3437254d | 2299 | { |
95e94c3f PA |
2300 | char filename[100]; |
2301 | long pid; | |
95e94c3f | 2302 | |
8b88a78e | 2303 | if (target_auxv_search (current_top_target (), AT_SYSINFO_EHDR, &range->start) <= 0) |
95e94c3f PA |
2304 | return 0; |
2305 | ||
6bb90213 PA |
2306 | /* It doesn't make sense to access the host's /proc when debugging a |
2307 | core file. Instead, look for the PT_LOAD segment that matches | |
2308 | the vDSO. */ | |
2309 | if (!target_has_execution) | |
2310 | { | |
6bb90213 PA |
2311 | long phdrs_size; |
2312 | int num_phdrs, i; | |
2313 | ||
2314 | phdrs_size = bfd_get_elf_phdr_upper_bound (core_bfd); | |
2315 | if (phdrs_size == -1) | |
2316 | return 0; | |
2317 | ||
31aceee8 TV |
2318 | gdb::unique_xmalloc_ptr<Elf_Internal_Phdr> |
2319 | phdrs ((Elf_Internal_Phdr *) xmalloc (phdrs_size)); | |
2320 | num_phdrs = bfd_get_elf_phdrs (core_bfd, phdrs.get ()); | |
6bb90213 PA |
2321 | if (num_phdrs == -1) |
2322 | return 0; | |
2323 | ||
2324 | for (i = 0; i < num_phdrs; i++) | |
31aceee8 TV |
2325 | if (phdrs.get ()[i].p_type == PT_LOAD |
2326 | && phdrs.get ()[i].p_vaddr == range->start) | |
6bb90213 | 2327 | { |
31aceee8 | 2328 | range->length = phdrs.get ()[i].p_memsz; |
6bb90213 PA |
2329 | return 1; |
2330 | } | |
2331 | ||
2332 | return 0; | |
2333 | } | |
2334 | ||
95e94c3f PA |
2335 | /* We need to know the real target PID to access /proc. */ |
2336 | if (current_inferior ()->fake_pid_p) | |
2337 | return 0; | |
2338 | ||
95e94c3f | 2339 | pid = current_inferior ()->pid; |
3437254d | 2340 | |
95e94c3f PA |
2341 | /* Note that reading /proc/PID/task/PID/maps (1) is much faster than |
2342 | reading /proc/PID/maps (2). The later identifies thread stacks | |
2343 | in the output, which requires scanning every thread in the thread | |
2344 | group to check whether a VMA is actually a thread's stack. With | |
2345 | Linux 4.4 on an Intel i7-4810MQ @ 2.80GHz, with an inferior with | |
2346 | a few thousand threads, (1) takes a few miliseconds, while (2) | |
2347 | takes several seconds. Also note that "smaps", what we read for | |
2348 | determining core dump mappings, is even slower than "maps". */ | |
2349 | xsnprintf (filename, sizeof filename, "/proc/%ld/task/%ld/maps", pid, pid); | |
87028b87 TT |
2350 | gdb::unique_xmalloc_ptr<char> data |
2351 | = target_fileio_read_stralloc (NULL, filename); | |
95e94c3f PA |
2352 | if (data != NULL) |
2353 | { | |
95e94c3f PA |
2354 | char *line; |
2355 | char *saveptr = NULL; | |
2356 | ||
87028b87 | 2357 | for (line = strtok_r (data.get (), "\n", &saveptr); |
95e94c3f PA |
2358 | line != NULL; |
2359 | line = strtok_r (NULL, "\n", &saveptr)) | |
2360 | { | |
2361 | ULONGEST addr, endaddr; | |
2362 | const char *p = line; | |
2363 | ||
2364 | addr = strtoulst (p, &p, 16); | |
2365 | if (addr == range->start) | |
2366 | { | |
2367 | if (*p == '-') | |
2368 | p++; | |
2369 | endaddr = strtoulst (p, &p, 16); | |
2370 | range->length = endaddr - addr; | |
95e94c3f PA |
2371 | return 1; |
2372 | } | |
2373 | } | |
95e94c3f PA |
2374 | } |
2375 | else | |
2376 | warning (_("unable to open /proc file '%s'"), filename); | |
2377 | ||
2378 | return 0; | |
3437254d PA |
2379 | } |
2380 | ||
cdfa0b0a PA |
2381 | /* Implementation of the "vsyscall_range" gdbarch hook. Handles |
2382 | caching, and defers the real work to linux_vsyscall_range_raw. */ | |
2383 | ||
2384 | static int | |
2385 | linux_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range) | |
2386 | { | |
2387 | struct linux_info *info = get_linux_inferior_data (); | |
2388 | ||
2389 | if (info->vsyscall_range_p == 0) | |
2390 | { | |
2391 | if (linux_vsyscall_range_raw (gdbarch, &info->vsyscall_range)) | |
2392 | info->vsyscall_range_p = 1; | |
2393 | else | |
2394 | info->vsyscall_range_p = -1; | |
2395 | } | |
2396 | ||
2397 | if (info->vsyscall_range_p < 0) | |
2398 | return 0; | |
2399 | ||
2400 | *range = info->vsyscall_range; | |
2401 | return 1; | |
2402 | } | |
2403 | ||
3bc3cebe JK |
2404 | /* Symbols for linux_infcall_mmap's ARG_FLAGS; their Linux MAP_* system |
2405 | definitions would be dependent on compilation host. */ | |
2406 | #define GDB_MMAP_MAP_PRIVATE 0x02 /* Changes are private. */ | |
2407 | #define GDB_MMAP_MAP_ANONYMOUS 0x20 /* Don't use a file. */ | |
2408 | ||
2409 | /* See gdbarch.sh 'infcall_mmap'. */ | |
2410 | ||
2411 | static CORE_ADDR | |
2412 | linux_infcall_mmap (CORE_ADDR size, unsigned prot) | |
2413 | { | |
2414 | struct objfile *objf; | |
2415 | /* Do there still exist any Linux systems without "mmap64"? | |
2416 | "mmap" uses 64-bit off_t on x86_64 and 32-bit off_t on i386 and x32. */ | |
2417 | struct value *mmap_val = find_function_in_inferior ("mmap64", &objf); | |
2418 | struct value *addr_val; | |
2419 | struct gdbarch *gdbarch = get_objfile_arch (objf); | |
2420 | CORE_ADDR retval; | |
2421 | enum | |
2422 | { | |
2a546367 | 2423 | ARG_ADDR, ARG_LENGTH, ARG_PROT, ARG_FLAGS, ARG_FD, ARG_OFFSET, ARG_LAST |
3bc3cebe | 2424 | }; |
2a546367 | 2425 | struct value *arg[ARG_LAST]; |
3bc3cebe JK |
2426 | |
2427 | arg[ARG_ADDR] = value_from_pointer (builtin_type (gdbarch)->builtin_data_ptr, | |
2428 | 0); | |
2429 | /* Assuming sizeof (unsigned long) == sizeof (size_t). */ | |
2430 | arg[ARG_LENGTH] = value_from_ulongest | |
2431 | (builtin_type (gdbarch)->builtin_unsigned_long, size); | |
2432 | gdb_assert ((prot & ~(GDB_MMAP_PROT_READ | GDB_MMAP_PROT_WRITE | |
2433 | | GDB_MMAP_PROT_EXEC)) | |
2434 | == 0); | |
2435 | arg[ARG_PROT] = value_from_longest (builtin_type (gdbarch)->builtin_int, prot); | |
2436 | arg[ARG_FLAGS] = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
2437 | GDB_MMAP_MAP_PRIVATE | |
2438 | | GDB_MMAP_MAP_ANONYMOUS); | |
2439 | arg[ARG_FD] = value_from_longest (builtin_type (gdbarch)->builtin_int, -1); | |
2440 | arg[ARG_OFFSET] = value_from_longest (builtin_type (gdbarch)->builtin_int64, | |
2441 | 0); | |
e71585ff | 2442 | addr_val = call_function_by_hand (mmap_val, NULL, arg); |
3bc3cebe JK |
2443 | retval = value_as_address (addr_val); |
2444 | if (retval == (CORE_ADDR) -1) | |
2445 | error (_("Failed inferior mmap call for %s bytes, errno is changed."), | |
2446 | pulongest (size)); | |
2447 | return retval; | |
2448 | } | |
2449 | ||
7f361056 JK |
2450 | /* See gdbarch.sh 'infcall_munmap'. */ |
2451 | ||
2452 | static void | |
2453 | linux_infcall_munmap (CORE_ADDR addr, CORE_ADDR size) | |
2454 | { | |
2455 | struct objfile *objf; | |
2456 | struct value *munmap_val = find_function_in_inferior ("munmap", &objf); | |
2457 | struct value *retval_val; | |
2458 | struct gdbarch *gdbarch = get_objfile_arch (objf); | |
2459 | LONGEST retval; | |
2460 | enum | |
2461 | { | |
2462 | ARG_ADDR, ARG_LENGTH, ARG_LAST | |
2463 | }; | |
2464 | struct value *arg[ARG_LAST]; | |
2465 | ||
2466 | arg[ARG_ADDR] = value_from_pointer (builtin_type (gdbarch)->builtin_data_ptr, | |
2467 | addr); | |
2468 | /* Assuming sizeof (unsigned long) == sizeof (size_t). */ | |
2469 | arg[ARG_LENGTH] = value_from_ulongest | |
2470 | (builtin_type (gdbarch)->builtin_unsigned_long, size); | |
e71585ff | 2471 | retval_val = call_function_by_hand (munmap_val, NULL, arg); |
7f361056 JK |
2472 | retval = value_as_long (retval_val); |
2473 | if (retval != 0) | |
2474 | warning (_("Failed inferior munmap call at %s for %s bytes, " | |
2475 | "errno is changed."), | |
2476 | hex_string (addr), pulongest (size)); | |
2477 | } | |
2478 | ||
906d60cf PA |
2479 | /* See linux-tdep.h. */ |
2480 | ||
2481 | CORE_ADDR | |
2482 | linux_displaced_step_location (struct gdbarch *gdbarch) | |
2483 | { | |
2484 | CORE_ADDR addr; | |
2485 | int bp_len; | |
2486 | ||
2487 | /* Determine entry point from target auxiliary vector. This avoids | |
2488 | the need for symbols. Also, when debugging a stand-alone SPU | |
2489 | executable, entry_point_address () will point to an SPU | |
2490 | local-store address and is thus not usable as displaced stepping | |
2491 | location. The auxiliary vector gets us the PowerPC-side entry | |
2492 | point address instead. */ | |
8b88a78e | 2493 | if (target_auxv_search (current_top_target (), AT_ENTRY, &addr) <= 0) |
16b41842 PA |
2494 | throw_error (NOT_SUPPORTED_ERROR, |
2495 | _("Cannot find AT_ENTRY auxiliary vector entry.")); | |
906d60cf PA |
2496 | |
2497 | /* Make certain that the address points at real code, and not a | |
2498 | function descriptor. */ | |
2499 | addr = gdbarch_convert_from_func_ptr_addr (gdbarch, addr, | |
8b88a78e | 2500 | current_top_target ()); |
906d60cf PA |
2501 | |
2502 | /* Inferior calls also use the entry point as a breakpoint location. | |
2503 | We don't want displaced stepping to interfere with those | |
2504 | breakpoints, so leave space. */ | |
2505 | gdbarch_breakpoint_from_pc (gdbarch, &addr, &bp_len); | |
2506 | addr += bp_len * 2; | |
2507 | ||
2508 | return addr; | |
2509 | } | |
2510 | ||
0f83012e AH |
2511 | /* See linux-tdep.h. */ |
2512 | ||
2513 | CORE_ADDR | |
2514 | linux_get_hwcap (struct target_ops *target) | |
2515 | { | |
2516 | CORE_ADDR field; | |
2517 | if (target_auxv_search (target, AT_HWCAP, &field) != 1) | |
2518 | return 0; | |
2519 | return field; | |
2520 | } | |
2521 | ||
2522 | /* See linux-tdep.h. */ | |
2523 | ||
2524 | CORE_ADDR | |
2525 | linux_get_hwcap2 (struct target_ops *target) | |
2526 | { | |
2527 | CORE_ADDR field; | |
2528 | if (target_auxv_search (target, AT_HWCAP2, &field) != 1) | |
2529 | return 0; | |
2530 | return field; | |
2531 | } | |
2532 | ||
df8411da SDJ |
2533 | /* Display whether the gcore command is using the |
2534 | /proc/PID/coredump_filter file. */ | |
2535 | ||
2536 | static void | |
2537 | show_use_coredump_filter (struct ui_file *file, int from_tty, | |
2538 | struct cmd_list_element *c, const char *value) | |
2539 | { | |
2540 | fprintf_filtered (file, _("Use of /proc/PID/coredump_filter file to generate" | |
2541 | " corefiles is %s.\n"), value); | |
2542 | } | |
2543 | ||
afa840dc SL |
2544 | /* Display whether the gcore command is dumping mappings marked with |
2545 | the VM_DONTDUMP flag. */ | |
2546 | ||
2547 | static void | |
2548 | show_dump_excluded_mappings (struct ui_file *file, int from_tty, | |
2549 | struct cmd_list_element *c, const char *value) | |
2550 | { | |
2551 | fprintf_filtered (file, _("Dumping of mappings marked with the VM_DONTDUMP" | |
2552 | " flag is %s.\n"), value); | |
2553 | } | |
2554 | ||
a5ee0f0c PA |
2555 | /* To be called from the various GDB_OSABI_LINUX handlers for the |
2556 | various GNU/Linux architectures and machine types. */ | |
2557 | ||
2558 | void | |
2559 | linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
2560 | { | |
2561 | set_gdbarch_core_pid_to_str (gdbarch, linux_core_pid_to_str); | |
3030c96e | 2562 | set_gdbarch_info_proc (gdbarch, linux_info_proc); |
451b7c33 | 2563 | set_gdbarch_core_info_proc (gdbarch, linux_core_info_proc); |
382b69bb | 2564 | set_gdbarch_core_xfer_siginfo (gdbarch, linux_core_xfer_siginfo); |
35c2fab7 | 2565 | set_gdbarch_find_memory_regions (gdbarch, linux_find_memory_regions); |
f968fe80 | 2566 | set_gdbarch_make_corefile_notes (gdbarch, linux_make_corefile_notes); |
33fbcbee PA |
2567 | set_gdbarch_has_shared_address_space (gdbarch, |
2568 | linux_has_shared_address_space); | |
eb14d406 SDJ |
2569 | set_gdbarch_gdb_signal_from_target (gdbarch, |
2570 | linux_gdb_signal_from_target); | |
2571 | set_gdbarch_gdb_signal_to_target (gdbarch, | |
2572 | linux_gdb_signal_to_target); | |
3437254d | 2573 | set_gdbarch_vsyscall_range (gdbarch, linux_vsyscall_range); |
3bc3cebe | 2574 | set_gdbarch_infcall_mmap (gdbarch, linux_infcall_mmap); |
7f361056 | 2575 | set_gdbarch_infcall_munmap (gdbarch, linux_infcall_munmap); |
5cd867b4 | 2576 | set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type); |
a5ee0f0c | 2577 | } |
06253dd3 JK |
2578 | |
2579 | void | |
2580 | _initialize_linux_tdep (void) | |
2581 | { | |
2582 | linux_gdbarch_data_handle = | |
2583 | gdbarch_data_register_post_init (init_linux_gdbarch_data); | |
cdfa0b0a PA |
2584 | |
2585 | /* Set a cache per-inferior. */ | |
2586 | linux_inferior_data | |
2587 | = register_inferior_data_with_cleanup (NULL, linux_inferior_data_cleanup); | |
2588 | /* Observers used to invalidate the cache when needed. */ | |
76727919 TT |
2589 | gdb::observers::inferior_exit.attach (invalidate_linux_cache_inf); |
2590 | gdb::observers::inferior_appeared.attach (invalidate_linux_cache_inf); | |
df8411da SDJ |
2591 | |
2592 | add_setshow_boolean_cmd ("use-coredump-filter", class_files, | |
2593 | &use_coredump_filter, _("\ | |
2594 | Set whether gcore should consider /proc/PID/coredump_filter."), | |
2595 | _("\ | |
2596 | Show whether gcore should consider /proc/PID/coredump_filter."), | |
2597 | _("\ | |
2598 | Use this command to set whether gcore should consider the contents\n\ | |
2599 | of /proc/PID/coredump_filter when generating the corefile. For more information\n\ | |
2600 | about this file, refer to the manpage of core(5)."), | |
2601 | NULL, show_use_coredump_filter, | |
2602 | &setlist, &showlist); | |
afa840dc SL |
2603 | |
2604 | add_setshow_boolean_cmd ("dump-excluded-mappings", class_files, | |
2605 | &dump_excluded_mappings, _("\ | |
2606 | Set whether gcore should dump mappings marked with the VM_DONTDUMP flag."), | |
2607 | _("\ | |
2608 | Show whether gcore should dump mappings marked with the VM_DONTDUMP flag."), | |
2609 | _("\ | |
2610 | Use this command to set whether gcore should dump mappings marked with the\n\ | |
2611 | VM_DONTDUMP flag (\"dd\" in /proc/PID/smaps) when generating the corefile. For\n\ | |
2612 | more information about this file, refer to the manpage of proc(5) and core(5)."), | |
2613 | NULL, show_dump_excluded_mappings, | |
2614 | &setlist, &showlist); | |
06253dd3 | 2615 | } |