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4aa995e1 PA |
1 | /* Target-dependent code for GNU/Linux, architecture independent. |
2 | ||
b811d2c2 | 3 | Copyright (C) 2009-2020 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" |
268a13a5 TT |
40 | #include "gdbsupport/enum-flags.h" |
41 | #include "gdbsupport/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 | ||
491144b5 | 94 | static bool use_coredump_filter = true; |
df8411da | 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. */ | |
491144b5 | 99 | static bool dump_excluded_mappings = false; |
afa840dc | 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 | /* Linux-specific cached data. This is used by GDB for caching |
187 | purposes for each inferior. This helps reduce the overhead of | |
188 | transfering data from a remote target to the local host. */ | |
189 | struct linux_info | |
190 | { | |
191 | /* Cache of the inferior's vsyscall/vDSO mapping range. Only valid | |
192 | if VSYSCALL_RANGE_P is positive. This is cached because getting | |
193 | at this info requires an auxv lookup (which is itself cached), | |
194 | and looking through the inferior's mappings (which change | |
195 | throughout execution and therefore cannot be cached). */ | |
89fb8848 | 196 | struct mem_range vsyscall_range {}; |
cdfa0b0a PA |
197 | |
198 | /* Zero if we haven't tried looking up the vsyscall's range before | |
199 | yet. Positive if we tried looking it up, and found it. Negative | |
200 | if we tried looking it up but failed. */ | |
89fb8848 | 201 | int vsyscall_range_p = 0; |
cdfa0b0a PA |
202 | }; |
203 | ||
89fb8848 TT |
204 | /* Per-inferior data key. */ |
205 | static const struct inferior_key<linux_info> linux_inferior_data; | |
206 | ||
cdfa0b0a PA |
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 | { | |
89fb8848 | 213 | linux_inferior_data.clear (inf); |
cdfa0b0a PA |
214 | } |
215 | ||
216 | /* Fetch the linux cache info for INF. This function always returns a | |
217 | valid INFO pointer. */ | |
218 | ||
219 | static struct linux_info * | |
220 | get_linux_inferior_data (void) | |
221 | { | |
222 | struct linux_info *info; | |
223 | struct inferior *inf = current_inferior (); | |
224 | ||
89fb8848 | 225 | info = linux_inferior_data.get (inf); |
cdfa0b0a | 226 | if (info == NULL) |
89fb8848 | 227 | info = linux_inferior_data.emplace (inf); |
cdfa0b0a PA |
228 | |
229 | return info; | |
230 | } | |
231 | ||
190b495d | 232 | /* See linux-tdep.h. */ |
4aa995e1 | 233 | |
190b495d | 234 | struct type * |
43564574 WT |
235 | linux_get_siginfo_type_with_fields (struct gdbarch *gdbarch, |
236 | linux_siginfo_extra_fields extra_fields) | |
4aa995e1 | 237 | { |
06253dd3 | 238 | struct linux_gdbarch_data *linux_gdbarch_data; |
96b5c49f | 239 | struct type *int_type, *uint_type, *long_type, *void_ptr_type, *short_type; |
4aa995e1 PA |
240 | struct type *uid_type, *pid_type; |
241 | struct type *sigval_type, *clock_type; | |
242 | struct type *siginfo_type, *sifields_type; | |
243 | struct type *type; | |
244 | ||
06253dd3 JK |
245 | linux_gdbarch_data = get_linux_gdbarch_data (gdbarch); |
246 | if (linux_gdbarch_data->siginfo_type != NULL) | |
247 | return linux_gdbarch_data->siginfo_type; | |
248 | ||
e9bb382b UW |
249 | int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), |
250 | 0, "int"); | |
251 | uint_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
252 | 1, "unsigned int"); | |
253 | long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), | |
254 | 0, "long"); | |
96b5c49f WT |
255 | short_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), |
256 | 0, "short"); | |
4aa995e1 PA |
257 | void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void); |
258 | ||
259 | /* sival_t */ | |
e9bb382b | 260 | sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); |
d0e39ea2 | 261 | sigval_type->set_name (xstrdup ("sigval_t")); |
4aa995e1 PA |
262 | append_composite_type_field (sigval_type, "sival_int", int_type); |
263 | append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type); | |
264 | ||
265 | /* __pid_t */ | |
e3aa49af | 266 | pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
77b7c781 | 267 | TYPE_LENGTH (int_type) * TARGET_CHAR_BIT, "__pid_t"); |
4aa995e1 | 268 | TYPE_TARGET_TYPE (pid_type) = int_type; |
e9bb382b | 269 | TYPE_TARGET_STUB (pid_type) = 1; |
4aa995e1 PA |
270 | |
271 | /* __uid_t */ | |
e3aa49af | 272 | uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
77b7c781 | 273 | TYPE_LENGTH (uint_type) * TARGET_CHAR_BIT, "__uid_t"); |
4aa995e1 | 274 | TYPE_TARGET_TYPE (uid_type) = uint_type; |
e9bb382b | 275 | TYPE_TARGET_STUB (uid_type) = 1; |
4aa995e1 PA |
276 | |
277 | /* __clock_t */ | |
e3aa49af | 278 | clock_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
77b7c781 UW |
279 | TYPE_LENGTH (long_type) * TARGET_CHAR_BIT, |
280 | "__clock_t"); | |
4aa995e1 | 281 | TYPE_TARGET_TYPE (clock_type) = long_type; |
e9bb382b | 282 | TYPE_TARGET_STUB (clock_type) = 1; |
4aa995e1 PA |
283 | |
284 | /* _sifields */ | |
e9bb382b | 285 | sifields_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); |
4aa995e1 PA |
286 | |
287 | { | |
288 | const int si_max_size = 128; | |
289 | int si_pad_size; | |
290 | int size_of_int = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT; | |
291 | ||
292 | /* _pad */ | |
293 | if (gdbarch_ptr_bit (gdbarch) == 64) | |
294 | si_pad_size = (si_max_size / size_of_int) - 4; | |
295 | else | |
296 | si_pad_size = (si_max_size / size_of_int) - 3; | |
297 | append_composite_type_field (sifields_type, "_pad", | |
298 | init_vector_type (int_type, si_pad_size)); | |
299 | } | |
300 | ||
301 | /* _kill */ | |
e9bb382b | 302 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
303 | append_composite_type_field (type, "si_pid", pid_type); |
304 | append_composite_type_field (type, "si_uid", uid_type); | |
305 | append_composite_type_field (sifields_type, "_kill", type); | |
306 | ||
307 | /* _timer */ | |
e9bb382b | 308 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
309 | append_composite_type_field (type, "si_tid", int_type); |
310 | append_composite_type_field (type, "si_overrun", int_type); | |
311 | append_composite_type_field (type, "si_sigval", sigval_type); | |
312 | append_composite_type_field (sifields_type, "_timer", type); | |
313 | ||
314 | /* _rt */ | |
e9bb382b | 315 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
316 | append_composite_type_field (type, "si_pid", pid_type); |
317 | append_composite_type_field (type, "si_uid", uid_type); | |
318 | append_composite_type_field (type, "si_sigval", sigval_type); | |
319 | append_composite_type_field (sifields_type, "_rt", type); | |
320 | ||
321 | /* _sigchld */ | |
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 (type, "si_status", int_type); | |
326 | append_composite_type_field (type, "si_utime", clock_type); | |
327 | append_composite_type_field (type, "si_stime", clock_type); | |
328 | append_composite_type_field (sifields_type, "_sigchld", type); | |
329 | ||
330 | /* _sigfault */ | |
e9bb382b | 331 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 | 332 | append_composite_type_field (type, "si_addr", void_ptr_type); |
96b5c49f WT |
333 | |
334 | /* Additional bound fields for _sigfault in case they were requested. */ | |
335 | if ((extra_fields & LINUX_SIGINFO_FIELD_ADDR_BND) != 0) | |
336 | { | |
337 | struct type *sigfault_bnd_fields; | |
338 | ||
339 | append_composite_type_field (type, "_addr_lsb", short_type); | |
340 | sigfault_bnd_fields = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); | |
341 | append_composite_type_field (sigfault_bnd_fields, "_lower", void_ptr_type); | |
342 | append_composite_type_field (sigfault_bnd_fields, "_upper", void_ptr_type); | |
343 | append_composite_type_field (type, "_addr_bnd", sigfault_bnd_fields); | |
344 | } | |
4aa995e1 PA |
345 | append_composite_type_field (sifields_type, "_sigfault", type); |
346 | ||
347 | /* _sigpoll */ | |
e9bb382b | 348 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
349 | append_composite_type_field (type, "si_band", long_type); |
350 | append_composite_type_field (type, "si_fd", int_type); | |
351 | append_composite_type_field (sifields_type, "_sigpoll", type); | |
352 | ||
353 | /* struct siginfo */ | |
e9bb382b | 354 | siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
d0e39ea2 | 355 | siginfo_type->set_name (xstrdup ("siginfo")); |
4aa995e1 PA |
356 | append_composite_type_field (siginfo_type, "si_signo", int_type); |
357 | append_composite_type_field (siginfo_type, "si_errno", int_type); | |
358 | append_composite_type_field (siginfo_type, "si_code", int_type); | |
359 | append_composite_type_field_aligned (siginfo_type, | |
360 | "_sifields", sifields_type, | |
361 | TYPE_LENGTH (long_type)); | |
362 | ||
06253dd3 JK |
363 | linux_gdbarch_data->siginfo_type = siginfo_type; |
364 | ||
4aa995e1 PA |
365 | return siginfo_type; |
366 | } | |
6b3ae818 | 367 | |
43564574 WT |
368 | /* This function is suitable for architectures that don't |
369 | extend/override the standard siginfo structure. */ | |
370 | ||
371 | static struct type * | |
372 | linux_get_siginfo_type (struct gdbarch *gdbarch) | |
373 | { | |
374 | return linux_get_siginfo_type_with_fields (gdbarch, 0); | |
375 | } | |
376 | ||
c01cbb3d YQ |
377 | /* Return true if the target is running on uClinux instead of normal |
378 | Linux kernel. */ | |
379 | ||
380 | int | |
381 | linux_is_uclinux (void) | |
6c95b8df | 382 | { |
6c95b8df | 383 | CORE_ADDR dummy; |
6c95b8df | 384 | |
8b88a78e PA |
385 | return (target_auxv_search (current_top_target (), AT_NULL, &dummy) > 0 |
386 | && target_auxv_search (current_top_target (), AT_PAGESZ, &dummy) == 0); | |
c01cbb3d | 387 | } |
6c95b8df | 388 | |
c01cbb3d YQ |
389 | static int |
390 | linux_has_shared_address_space (struct gdbarch *gdbarch) | |
391 | { | |
392 | return linux_is_uclinux (); | |
6c95b8df | 393 | } |
a5ee0f0c PA |
394 | |
395 | /* This is how we want PTIDs from core files to be printed. */ | |
396 | ||
a068643d | 397 | static std::string |
a5ee0f0c PA |
398 | linux_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid) |
399 | { | |
e38504b3 | 400 | if (ptid.lwp () != 0) |
a068643d | 401 | return string_printf ("LWP %ld", ptid.lwp ()); |
a5ee0f0c PA |
402 | |
403 | return normal_pid_to_str (ptid); | |
404 | } | |
405 | ||
db1ff28b JK |
406 | /* Service function for corefiles and info proc. */ |
407 | ||
408 | static void | |
409 | read_mapping (const char *line, | |
410 | ULONGEST *addr, ULONGEST *endaddr, | |
411 | const char **permissions, size_t *permissions_len, | |
412 | ULONGEST *offset, | |
413 | const char **device, size_t *device_len, | |
414 | ULONGEST *inode, | |
415 | const char **filename) | |
416 | { | |
417 | const char *p = line; | |
418 | ||
419 | *addr = strtoulst (p, &p, 16); | |
420 | if (*p == '-') | |
421 | p++; | |
422 | *endaddr = strtoulst (p, &p, 16); | |
423 | ||
f1735a53 | 424 | p = skip_spaces (p); |
db1ff28b JK |
425 | *permissions = p; |
426 | while (*p && !isspace (*p)) | |
427 | p++; | |
428 | *permissions_len = p - *permissions; | |
429 | ||
430 | *offset = strtoulst (p, &p, 16); | |
431 | ||
f1735a53 | 432 | p = skip_spaces (p); |
db1ff28b JK |
433 | *device = p; |
434 | while (*p && !isspace (*p)) | |
435 | p++; | |
436 | *device_len = p - *device; | |
437 | ||
438 | *inode = strtoulst (p, &p, 10); | |
439 | ||
f1735a53 | 440 | p = skip_spaces (p); |
db1ff28b JK |
441 | *filename = p; |
442 | } | |
443 | ||
444 | /* Helper function to decode the "VmFlags" field in /proc/PID/smaps. | |
445 | ||
446 | This function was based on the documentation found on | |
447 | <Documentation/filesystems/proc.txt>, on the Linux kernel. | |
448 | ||
449 | Linux kernels before commit | |
450 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10) do not have this | |
451 | field on smaps. */ | |
452 | ||
453 | static void | |
454 | decode_vmflags (char *p, struct smaps_vmflags *v) | |
455 | { | |
456 | char *saveptr = NULL; | |
457 | const char *s; | |
458 | ||
459 | v->initialized_p = 1; | |
460 | p = skip_to_space (p); | |
461 | p = skip_spaces (p); | |
462 | ||
463 | for (s = strtok_r (p, " ", &saveptr); | |
464 | s != NULL; | |
465 | s = strtok_r (NULL, " ", &saveptr)) | |
466 | { | |
467 | if (strcmp (s, "io") == 0) | |
468 | v->io_page = 1; | |
469 | else if (strcmp (s, "ht") == 0) | |
470 | v->uses_huge_tlb = 1; | |
471 | else if (strcmp (s, "dd") == 0) | |
472 | v->exclude_coredump = 1; | |
473 | else if (strcmp (s, "sh") == 0) | |
474 | v->shared_mapping = 1; | |
475 | } | |
476 | } | |
477 | ||
2d7cc5c7 PA |
478 | /* Regexes used by mapping_is_anonymous_p. Put in a structure because |
479 | they're initialized lazily. */ | |
480 | ||
481 | struct mapping_regexes | |
482 | { | |
483 | /* Matches "/dev/zero" filenames (with or without the "(deleted)" | |
484 | string in the end). We know for sure, based on the Linux kernel | |
485 | code, that memory mappings whose associated filename is | |
486 | "/dev/zero" are guaranteed to be MAP_ANONYMOUS. */ | |
487 | compiled_regex dev_zero | |
488 | {"^/dev/zero\\( (deleted)\\)\\?$", REG_NOSUB, | |
489 | _("Could not compile regex to match /dev/zero filename")}; | |
490 | ||
491 | /* Matches "/SYSV%08x" filenames (with or without the "(deleted)" | |
492 | string in the end). These filenames refer to shared memory | |
493 | (shmem), and memory mappings associated with them are | |
494 | MAP_ANONYMOUS as well. */ | |
495 | compiled_regex shmem_file | |
496 | {"^/\\?SYSV[0-9a-fA-F]\\{8\\}\\( (deleted)\\)\\?$", REG_NOSUB, | |
497 | _("Could not compile regex to match shmem filenames")}; | |
498 | ||
499 | /* A heuristic we use to try to mimic the Linux kernel's 'n_link == | |
500 | 0' code, which is responsible to decide if it is dealing with a | |
501 | 'MAP_SHARED | MAP_ANONYMOUS' mapping. In other words, if | |
502 | FILE_DELETED matches, it does not necessarily mean that we are | |
503 | dealing with an anonymous shared mapping. However, there is no | |
504 | easy way to detect this currently, so this is the best | |
505 | approximation we have. | |
506 | ||
507 | As a result, GDB will dump readonly pages of deleted executables | |
508 | when using the default value of coredump_filter (0x33), while the | |
509 | Linux kernel will not dump those pages. But we can live with | |
510 | that. */ | |
511 | compiled_regex file_deleted | |
512 | {" (deleted)$", REG_NOSUB, | |
513 | _("Could not compile regex to match '<file> (deleted)'")}; | |
514 | }; | |
515 | ||
db1ff28b JK |
516 | /* Return 1 if the memory mapping is anonymous, 0 otherwise. |
517 | ||
518 | FILENAME is the name of the file present in the first line of the | |
519 | memory mapping, in the "/proc/PID/smaps" output. For example, if | |
520 | the first line is: | |
521 | ||
522 | 7fd0ca877000-7fd0d0da0000 r--p 00000000 fd:02 2100770 /path/to/file | |
523 | ||
524 | Then FILENAME will be "/path/to/file". */ | |
525 | ||
526 | static int | |
527 | mapping_is_anonymous_p (const char *filename) | |
528 | { | |
2d7cc5c7 | 529 | static gdb::optional<mapping_regexes> regexes; |
db1ff28b JK |
530 | static int init_regex_p = 0; |
531 | ||
532 | if (!init_regex_p) | |
533 | { | |
db1ff28b JK |
534 | /* Let's be pessimistic and assume there will be an error while |
535 | compiling the regex'es. */ | |
536 | init_regex_p = -1; | |
537 | ||
2d7cc5c7 | 538 | regexes.emplace (); |
db1ff28b JK |
539 | |
540 | /* If we reached this point, then everything succeeded. */ | |
541 | init_regex_p = 1; | |
542 | } | |
543 | ||
544 | if (init_regex_p == -1) | |
545 | { | |
546 | const char deleted[] = " (deleted)"; | |
547 | size_t del_len = sizeof (deleted) - 1; | |
548 | size_t filename_len = strlen (filename); | |
549 | ||
550 | /* There was an error while compiling the regex'es above. In | |
551 | order to try to give some reliable information to the caller, | |
552 | we just try to find the string " (deleted)" in the filename. | |
553 | If we managed to find it, then we assume the mapping is | |
554 | anonymous. */ | |
555 | return (filename_len >= del_len | |
556 | && strcmp (filename + filename_len - del_len, deleted) == 0); | |
557 | } | |
558 | ||
559 | if (*filename == '\0' | |
2d7cc5c7 PA |
560 | || regexes->dev_zero.exec (filename, 0, NULL, 0) == 0 |
561 | || regexes->shmem_file.exec (filename, 0, NULL, 0) == 0 | |
562 | || regexes->file_deleted.exec (filename, 0, NULL, 0) == 0) | |
db1ff28b JK |
563 | return 1; |
564 | ||
565 | return 0; | |
566 | } | |
567 | ||
568 | /* Return 0 if the memory mapping (which is related to FILTERFLAGS, V, | |
57e5e645 SDJ |
569 | MAYBE_PRIVATE_P, MAPPING_ANONYMOUS_P, ADDR and OFFSET) should not |
570 | be dumped, or greater than 0 if it should. | |
db1ff28b JK |
571 | |
572 | In a nutshell, this is the logic that we follow in order to decide | |
573 | if a mapping should be dumped or not. | |
574 | ||
575 | - If the mapping is associated to a file whose name ends with | |
576 | " (deleted)", or if the file is "/dev/zero", or if it is | |
577 | "/SYSV%08x" (shared memory), or if there is no file associated | |
578 | with it, or if the AnonHugePages: or the Anonymous: fields in the | |
579 | /proc/PID/smaps have contents, then GDB considers this mapping to | |
580 | be anonymous. Otherwise, GDB considers this mapping to be a | |
581 | file-backed mapping (because there will be a file associated with | |
582 | it). | |
583 | ||
584 | It is worth mentioning that, from all those checks described | |
585 | above, the most fragile is the one to see if the file name ends | |
586 | with " (deleted)". This does not necessarily mean that the | |
587 | mapping is anonymous, because the deleted file associated with | |
588 | the mapping may have been a hard link to another file, for | |
589 | example. The Linux kernel checks to see if "i_nlink == 0", but | |
590 | GDB cannot easily (and normally) do this check (iff running as | |
591 | root, it could find the mapping in /proc/PID/map_files/ and | |
592 | determine whether there still are other hard links to the | |
593 | inode/file). Therefore, we made a compromise here, and we assume | |
594 | that if the file name ends with " (deleted)", then the mapping is | |
595 | indeed anonymous. FWIW, this is something the Linux kernel could | |
596 | do better: expose this information in a more direct way. | |
597 | ||
598 | - If we see the flag "sh" in the "VmFlags:" field (in | |
599 | /proc/PID/smaps), then certainly the memory mapping is shared | |
600 | (VM_SHARED). If we have access to the VmFlags, and we don't see | |
601 | the "sh" there, then certainly the mapping is private. However, | |
602 | Linux kernels before commit | |
603 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10) do not have the | |
604 | "VmFlags:" field; in that case, we use another heuristic: if we | |
605 | see 'p' in the permission flags, then we assume that the mapping | |
606 | is private, even though the presence of the 's' flag there would | |
607 | mean VM_MAYSHARE, which means the mapping could still be private. | |
57e5e645 SDJ |
608 | This should work OK enough, however. |
609 | ||
610 | - Even if, at the end, we decided that we should not dump the | |
611 | mapping, we still have to check if it is something like an ELF | |
612 | header (of a DSO or an executable, for example). If it is, and | |
613 | if the user is interested in dump it, then we should dump it. */ | |
db1ff28b JK |
614 | |
615 | static int | |
8d297bbf | 616 | dump_mapping_p (filter_flags filterflags, const struct smaps_vmflags *v, |
db1ff28b | 617 | int maybe_private_p, int mapping_anon_p, int mapping_file_p, |
57e5e645 | 618 | const char *filename, ULONGEST addr, ULONGEST offset) |
db1ff28b JK |
619 | { |
620 | /* Initially, we trust in what we received from our caller. This | |
621 | value may not be very precise (i.e., it was probably gathered | |
622 | from the permission line in the /proc/PID/smaps list, which | |
623 | actually refers to VM_MAYSHARE, and not VM_SHARED), but it is | |
624 | what we have until we take a look at the "VmFlags:" field | |
625 | (assuming that the version of the Linux kernel being used | |
626 | supports it, of course). */ | |
627 | int private_p = maybe_private_p; | |
57e5e645 | 628 | int dump_p; |
db1ff28b JK |
629 | |
630 | /* We always dump vDSO and vsyscall mappings, because it's likely that | |
631 | there'll be no file to read the contents from at core load time. | |
632 | The kernel does the same. */ | |
633 | if (strcmp ("[vdso]", filename) == 0 | |
634 | || strcmp ("[vsyscall]", filename) == 0) | |
635 | return 1; | |
636 | ||
637 | if (v->initialized_p) | |
638 | { | |
639 | /* We never dump I/O mappings. */ | |
640 | if (v->io_page) | |
641 | return 0; | |
642 | ||
643 | /* Check if we should exclude this mapping. */ | |
afa840dc | 644 | if (!dump_excluded_mappings && v->exclude_coredump) |
db1ff28b JK |
645 | return 0; |
646 | ||
647 | /* Update our notion of whether this mapping is shared or | |
648 | private based on a trustworthy value. */ | |
649 | private_p = !v->shared_mapping; | |
650 | ||
651 | /* HugeTLB checking. */ | |
652 | if (v->uses_huge_tlb) | |
653 | { | |
654 | if ((private_p && (filterflags & COREFILTER_HUGETLB_PRIVATE)) | |
655 | || (!private_p && (filterflags & COREFILTER_HUGETLB_SHARED))) | |
656 | return 1; | |
657 | ||
658 | return 0; | |
659 | } | |
660 | } | |
661 | ||
662 | if (private_p) | |
663 | { | |
664 | if (mapping_anon_p && mapping_file_p) | |
665 | { | |
666 | /* This is a special situation. It can happen when we see a | |
667 | mapping that is file-backed, but that contains anonymous | |
668 | pages. */ | |
57e5e645 SDJ |
669 | dump_p = ((filterflags & COREFILTER_ANON_PRIVATE) != 0 |
670 | || (filterflags & COREFILTER_MAPPED_PRIVATE) != 0); | |
db1ff28b JK |
671 | } |
672 | else if (mapping_anon_p) | |
57e5e645 | 673 | dump_p = (filterflags & COREFILTER_ANON_PRIVATE) != 0; |
db1ff28b | 674 | else |
57e5e645 | 675 | dump_p = (filterflags & COREFILTER_MAPPED_PRIVATE) != 0; |
db1ff28b JK |
676 | } |
677 | else | |
678 | { | |
679 | if (mapping_anon_p && mapping_file_p) | |
680 | { | |
681 | /* This is a special situation. It can happen when we see a | |
682 | mapping that is file-backed, but that contains anonymous | |
683 | pages. */ | |
57e5e645 SDJ |
684 | dump_p = ((filterflags & COREFILTER_ANON_SHARED) != 0 |
685 | || (filterflags & COREFILTER_MAPPED_SHARED) != 0); | |
db1ff28b JK |
686 | } |
687 | else if (mapping_anon_p) | |
57e5e645 | 688 | dump_p = (filterflags & COREFILTER_ANON_SHARED) != 0; |
db1ff28b | 689 | else |
57e5e645 | 690 | dump_p = (filterflags & COREFILTER_MAPPED_SHARED) != 0; |
db1ff28b | 691 | } |
57e5e645 SDJ |
692 | |
693 | /* Even if we decided that we shouldn't dump this mapping, we still | |
694 | have to check whether (a) the user wants us to dump mappings | |
695 | containing an ELF header, and (b) the mapping in question | |
696 | contains an ELF header. If (a) and (b) are true, then we should | |
697 | dump this mapping. | |
698 | ||
699 | A mapping contains an ELF header if it is a private mapping, its | |
700 | offset is zero, and its first word is ELFMAG. */ | |
701 | if (!dump_p && private_p && offset == 0 | |
702 | && (filterflags & COREFILTER_ELF_HEADERS) != 0) | |
703 | { | |
57e5e645 SDJ |
704 | /* Useful define specifying the size of the ELF magical |
705 | header. */ | |
706 | #ifndef SELFMAG | |
707 | #define SELFMAG 4 | |
708 | #endif | |
709 | ||
a5d871dd TT |
710 | /* Let's check if we have an ELF header. */ |
711 | gdb_byte h[SELFMAG]; | |
712 | if (target_read_memory (addr, h, SELFMAG) == 0) | |
57e5e645 | 713 | { |
57e5e645 SDJ |
714 | /* The EI_MAG* and ELFMAG* constants come from |
715 | <elf/common.h>. */ | |
716 | if (h[EI_MAG0] == ELFMAG0 && h[EI_MAG1] == ELFMAG1 | |
717 | && h[EI_MAG2] == ELFMAG2 && h[EI_MAG3] == ELFMAG3) | |
718 | { | |
719 | /* This mapping contains an ELF header, so we | |
720 | should dump it. */ | |
721 | dump_p = 1; | |
722 | } | |
723 | } | |
724 | } | |
725 | ||
726 | return dump_p; | |
db1ff28b JK |
727 | } |
728 | ||
4ba11f89 KB |
729 | /* As above, but return true only when we should dump the NT_FILE |
730 | entry. */ | |
731 | ||
732 | static int | |
733 | dump_note_entry_p (filter_flags filterflags, const struct smaps_vmflags *v, | |
734 | int maybe_private_p, int mapping_anon_p, int mapping_file_p, | |
735 | const char *filename, ULONGEST addr, ULONGEST offset) | |
736 | { | |
737 | /* vDSO and vsyscall mappings will end up in the core file. Don't | |
738 | put them in the NT_FILE note. */ | |
739 | if (strcmp ("[vdso]", filename) == 0 | |
740 | || strcmp ("[vsyscall]", filename) == 0) | |
741 | return 0; | |
742 | ||
743 | /* Otherwise, any other file-based mapping should be placed in the | |
744 | note. */ | |
745 | return filename != nullptr; | |
746 | } | |
747 | ||
3030c96e UW |
748 | /* Implement the "info proc" command. */ |
749 | ||
750 | static void | |
7bc112c1 | 751 | linux_info_proc (struct gdbarch *gdbarch, const char *args, |
3030c96e UW |
752 | enum info_proc_what what) |
753 | { | |
754 | /* A long is used for pid instead of an int to avoid a loss of precision | |
755 | compiler warning from the output of strtoul. */ | |
756 | long pid; | |
757 | int cmdline_f = (what == IP_MINIMAL || what == IP_CMDLINE || what == IP_ALL); | |
758 | int cwd_f = (what == IP_MINIMAL || what == IP_CWD || what == IP_ALL); | |
759 | int exe_f = (what == IP_MINIMAL || what == IP_EXE || what == IP_ALL); | |
760 | int mappings_f = (what == IP_MAPPINGS || what == IP_ALL); | |
761 | int status_f = (what == IP_STATUS || what == IP_ALL); | |
762 | int stat_f = (what == IP_STAT || what == IP_ALL); | |
763 | char filename[100]; | |
3030c96e UW |
764 | int target_errno; |
765 | ||
766 | if (args && isdigit (args[0])) | |
7bc112c1 TT |
767 | { |
768 | char *tem; | |
769 | ||
770 | pid = strtoul (args, &tem, 10); | |
771 | args = tem; | |
772 | } | |
3030c96e UW |
773 | else |
774 | { | |
775 | if (!target_has_execution) | |
776 | error (_("No current process: you must name one.")); | |
777 | if (current_inferior ()->fake_pid_p) | |
778 | error (_("Can't determine the current process's PID: you must name one.")); | |
779 | ||
780 | pid = current_inferior ()->pid; | |
781 | } | |
782 | ||
f1735a53 | 783 | args = skip_spaces (args); |
3030c96e UW |
784 | if (args && args[0]) |
785 | error (_("Too many parameters: %s"), args); | |
786 | ||
787 | printf_filtered (_("process %ld\n"), pid); | |
788 | if (cmdline_f) | |
789 | { | |
790 | xsnprintf (filename, sizeof filename, "/proc/%ld/cmdline", pid); | |
26d6cec4 AA |
791 | gdb_byte *buffer; |
792 | ssize_t len = target_fileio_read_alloc (NULL, filename, &buffer); | |
793 | ||
794 | if (len > 0) | |
795 | { | |
796 | gdb::unique_xmalloc_ptr<char> cmdline ((char *) buffer); | |
797 | ssize_t pos; | |
798 | ||
799 | for (pos = 0; pos < len - 1; pos++) | |
800 | { | |
801 | if (buffer[pos] == '\0') | |
802 | buffer[pos] = ' '; | |
803 | } | |
804 | buffer[len - 1] = '\0'; | |
805 | printf_filtered ("cmdline = '%s'\n", buffer); | |
806 | } | |
3030c96e UW |
807 | else |
808 | warning (_("unable to open /proc file '%s'"), filename); | |
809 | } | |
810 | if (cwd_f) | |
811 | { | |
812 | xsnprintf (filename, sizeof filename, "/proc/%ld/cwd", pid); | |
e0d3522b TT |
813 | gdb::optional<std::string> contents |
814 | = target_fileio_readlink (NULL, filename, &target_errno); | |
815 | if (contents.has_value ()) | |
816 | printf_filtered ("cwd = '%s'\n", contents->c_str ()); | |
3030c96e UW |
817 | else |
818 | warning (_("unable to read link '%s'"), filename); | |
819 | } | |
820 | if (exe_f) | |
821 | { | |
822 | xsnprintf (filename, sizeof filename, "/proc/%ld/exe", pid); | |
e0d3522b TT |
823 | gdb::optional<std::string> contents |
824 | = target_fileio_readlink (NULL, filename, &target_errno); | |
825 | if (contents.has_value ()) | |
826 | printf_filtered ("exe = '%s'\n", contents->c_str ()); | |
3030c96e UW |
827 | else |
828 | warning (_("unable to read link '%s'"), filename); | |
829 | } | |
830 | if (mappings_f) | |
831 | { | |
832 | xsnprintf (filename, sizeof filename, "/proc/%ld/maps", pid); | |
87028b87 TT |
833 | gdb::unique_xmalloc_ptr<char> map |
834 | = target_fileio_read_stralloc (NULL, filename); | |
835 | if (map != NULL) | |
3030c96e | 836 | { |
3030c96e UW |
837 | char *line; |
838 | ||
839 | printf_filtered (_("Mapped address spaces:\n\n")); | |
840 | if (gdbarch_addr_bit (gdbarch) == 32) | |
841 | { | |
842 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
843 | "Start Addr", | |
844 | " End Addr", | |
845 | " Size", " Offset", "objfile"); | |
846 | } | |
847 | else | |
848 | { | |
849 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
850 | "Start Addr", | |
851 | " End Addr", | |
852 | " Size", " Offset", "objfile"); | |
853 | } | |
854 | ||
ca3a04f6 CB |
855 | char *saveptr; |
856 | for (line = strtok_r (map.get (), "\n", &saveptr); | |
87028b87 | 857 | line; |
ca3a04f6 | 858 | line = strtok_r (NULL, "\n", &saveptr)) |
3030c96e UW |
859 | { |
860 | ULONGEST addr, endaddr, offset, inode; | |
b926417a | 861 | const char *permissions, *device, *mapping_filename; |
3030c96e UW |
862 | size_t permissions_len, device_len; |
863 | ||
864 | read_mapping (line, &addr, &endaddr, | |
865 | &permissions, &permissions_len, | |
866 | &offset, &device, &device_len, | |
b926417a | 867 | &inode, &mapping_filename); |
3030c96e UW |
868 | |
869 | if (gdbarch_addr_bit (gdbarch) == 32) | |
870 | { | |
871 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
872 | paddress (gdbarch, addr), | |
873 | paddress (gdbarch, endaddr), | |
874 | hex_string (endaddr - addr), | |
875 | hex_string (offset), | |
b926417a | 876 | *mapping_filename ? mapping_filename : ""); |
3030c96e UW |
877 | } |
878 | else | |
879 | { | |
880 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
881 | paddress (gdbarch, addr), | |
882 | paddress (gdbarch, endaddr), | |
883 | hex_string (endaddr - addr), | |
884 | hex_string (offset), | |
b926417a | 885 | *mapping_filename ? mapping_filename : ""); |
3030c96e UW |
886 | } |
887 | } | |
3030c96e UW |
888 | } |
889 | else | |
890 | warning (_("unable to open /proc file '%s'"), filename); | |
891 | } | |
892 | if (status_f) | |
893 | { | |
894 | xsnprintf (filename, sizeof filename, "/proc/%ld/status", pid); | |
87028b87 TT |
895 | gdb::unique_xmalloc_ptr<char> status |
896 | = target_fileio_read_stralloc (NULL, filename); | |
897 | if (status) | |
898 | puts_filtered (status.get ()); | |
3030c96e UW |
899 | else |
900 | warning (_("unable to open /proc file '%s'"), filename); | |
901 | } | |
902 | if (stat_f) | |
903 | { | |
904 | xsnprintf (filename, sizeof filename, "/proc/%ld/stat", pid); | |
87028b87 TT |
905 | gdb::unique_xmalloc_ptr<char> statstr |
906 | = target_fileio_read_stralloc (NULL, filename); | |
907 | if (statstr) | |
3030c96e | 908 | { |
87028b87 | 909 | const char *p = statstr.get (); |
3030c96e UW |
910 | |
911 | printf_filtered (_("Process: %s\n"), | |
912 | pulongest (strtoulst (p, &p, 10))); | |
913 | ||
f1735a53 | 914 | p = skip_spaces (p); |
a71b5a38 | 915 | if (*p == '(') |
3030c96e | 916 | { |
184cd072 JK |
917 | /* ps command also relies on no trailing fields |
918 | ever contain ')'. */ | |
919 | const char *ep = strrchr (p, ')'); | |
a71b5a38 UW |
920 | if (ep != NULL) |
921 | { | |
922 | printf_filtered ("Exec file: %.*s\n", | |
923 | (int) (ep - p - 1), p + 1); | |
924 | p = ep + 1; | |
925 | } | |
3030c96e UW |
926 | } |
927 | ||
f1735a53 | 928 | p = skip_spaces (p); |
3030c96e UW |
929 | if (*p) |
930 | printf_filtered (_("State: %c\n"), *p++); | |
931 | ||
932 | if (*p) | |
933 | printf_filtered (_("Parent process: %s\n"), | |
934 | pulongest (strtoulst (p, &p, 10))); | |
935 | if (*p) | |
936 | printf_filtered (_("Process group: %s\n"), | |
937 | pulongest (strtoulst (p, &p, 10))); | |
938 | if (*p) | |
939 | printf_filtered (_("Session id: %s\n"), | |
940 | pulongest (strtoulst (p, &p, 10))); | |
941 | if (*p) | |
942 | printf_filtered (_("TTY: %s\n"), | |
943 | pulongest (strtoulst (p, &p, 10))); | |
944 | if (*p) | |
945 | printf_filtered (_("TTY owner process group: %s\n"), | |
946 | pulongest (strtoulst (p, &p, 10))); | |
947 | ||
948 | if (*p) | |
949 | printf_filtered (_("Flags: %s\n"), | |
950 | hex_string (strtoulst (p, &p, 10))); | |
951 | if (*p) | |
952 | printf_filtered (_("Minor faults (no memory page): %s\n"), | |
953 | pulongest (strtoulst (p, &p, 10))); | |
954 | if (*p) | |
955 | printf_filtered (_("Minor faults, children: %s\n"), | |
956 | pulongest (strtoulst (p, &p, 10))); | |
957 | if (*p) | |
958 | printf_filtered (_("Major faults (memory page faults): %s\n"), | |
959 | pulongest (strtoulst (p, &p, 10))); | |
960 | if (*p) | |
961 | printf_filtered (_("Major faults, children: %s\n"), | |
962 | pulongest (strtoulst (p, &p, 10))); | |
963 | if (*p) | |
964 | printf_filtered (_("utime: %s\n"), | |
965 | pulongest (strtoulst (p, &p, 10))); | |
966 | if (*p) | |
967 | printf_filtered (_("stime: %s\n"), | |
968 | pulongest (strtoulst (p, &p, 10))); | |
969 | if (*p) | |
970 | printf_filtered (_("utime, children: %s\n"), | |
971 | pulongest (strtoulst (p, &p, 10))); | |
972 | if (*p) | |
973 | printf_filtered (_("stime, children: %s\n"), | |
974 | pulongest (strtoulst (p, &p, 10))); | |
975 | if (*p) | |
976 | printf_filtered (_("jiffies remaining in current " | |
977 | "time slice: %s\n"), | |
978 | pulongest (strtoulst (p, &p, 10))); | |
979 | if (*p) | |
980 | printf_filtered (_("'nice' value: %s\n"), | |
981 | pulongest (strtoulst (p, &p, 10))); | |
982 | if (*p) | |
983 | printf_filtered (_("jiffies until next timeout: %s\n"), | |
984 | pulongest (strtoulst (p, &p, 10))); | |
985 | if (*p) | |
986 | printf_filtered (_("jiffies until next SIGALRM: %s\n"), | |
987 | pulongest (strtoulst (p, &p, 10))); | |
988 | if (*p) | |
989 | printf_filtered (_("start time (jiffies since " | |
990 | "system boot): %s\n"), | |
991 | pulongest (strtoulst (p, &p, 10))); | |
992 | if (*p) | |
993 | printf_filtered (_("Virtual memory size: %s\n"), | |
994 | pulongest (strtoulst (p, &p, 10))); | |
995 | if (*p) | |
996 | printf_filtered (_("Resident set size: %s\n"), | |
997 | pulongest (strtoulst (p, &p, 10))); | |
998 | if (*p) | |
999 | printf_filtered (_("rlim: %s\n"), | |
1000 | pulongest (strtoulst (p, &p, 10))); | |
1001 | if (*p) | |
1002 | printf_filtered (_("Start of text: %s\n"), | |
1003 | hex_string (strtoulst (p, &p, 10))); | |
1004 | if (*p) | |
1005 | printf_filtered (_("End of text: %s\n"), | |
1006 | hex_string (strtoulst (p, &p, 10))); | |
1007 | if (*p) | |
1008 | printf_filtered (_("Start of stack: %s\n"), | |
1009 | hex_string (strtoulst (p, &p, 10))); | |
1010 | #if 0 /* Don't know how architecture-dependent the rest is... | |
1011 | Anyway the signal bitmap info is available from "status". */ | |
1012 | if (*p) | |
1013 | printf_filtered (_("Kernel stack pointer: %s\n"), | |
1014 | hex_string (strtoulst (p, &p, 10))); | |
1015 | if (*p) | |
1016 | printf_filtered (_("Kernel instr pointer: %s\n"), | |
1017 | hex_string (strtoulst (p, &p, 10))); | |
1018 | if (*p) | |
1019 | printf_filtered (_("Pending signals bitmap: %s\n"), | |
1020 | hex_string (strtoulst (p, &p, 10))); | |
1021 | if (*p) | |
1022 | printf_filtered (_("Blocked signals bitmap: %s\n"), | |
1023 | hex_string (strtoulst (p, &p, 10))); | |
1024 | if (*p) | |
1025 | printf_filtered (_("Ignored signals bitmap: %s\n"), | |
1026 | hex_string (strtoulst (p, &p, 10))); | |
1027 | if (*p) | |
1028 | printf_filtered (_("Catched signals bitmap: %s\n"), | |
1029 | hex_string (strtoulst (p, &p, 10))); | |
1030 | if (*p) | |
1031 | printf_filtered (_("wchan (system call): %s\n"), | |
1032 | hex_string (strtoulst (p, &p, 10))); | |
1033 | #endif | |
3030c96e UW |
1034 | } |
1035 | else | |
1036 | warning (_("unable to open /proc file '%s'"), filename); | |
1037 | } | |
1038 | } | |
1039 | ||
db082f59 KB |
1040 | /* Implementation of `gdbarch_read_core_file_mappings', as defined in |
1041 | gdbarch.h. | |
1042 | ||
1043 | This function reads the NT_FILE note (which BFD turns into the | |
1044 | section ".note.linuxcore.file"). The format of this note / section | |
1045 | is described as follows in the Linux kernel sources in | |
1046 | fs/binfmt_elf.c: | |
1047 | ||
1048 | long count -- how many files are mapped | |
1049 | long page_size -- units for file_ofs | |
1050 | array of [COUNT] elements of | |
1051 | long start | |
1052 | long end | |
1053 | long file_ofs | |
1054 | followed by COUNT filenames in ASCII: "FILE1" NUL "FILE2" NUL... | |
1055 | ||
1056 | CBFD is the BFD of the core file. | |
1057 | ||
1058 | PRE_LOOP_CB is the callback function to invoke prior to starting | |
1059 | the loop which processes individual entries. This callback will | |
1060 | only be executed after the note has been examined in enough | |
1061 | detail to verify that it's not malformed in some way. | |
1062 | ||
1063 | LOOP_CB is the callback function that will be executed once | |
1064 | for each mapping. */ | |
451b7c33 TT |
1065 | |
1066 | static void | |
db082f59 KB |
1067 | linux_read_core_file_mappings (struct gdbarch *gdbarch, |
1068 | struct bfd *cbfd, | |
1069 | gdb::function_view<void (ULONGEST count)> | |
1070 | pre_loop_cb, | |
1071 | gdb::function_view<void (int num, | |
1072 | ULONGEST start, | |
1073 | ULONGEST end, | |
1074 | ULONGEST file_ofs, | |
1075 | const char *filename, | |
1076 | const void *other)> | |
1077 | loop_cb) | |
451b7c33 | 1078 | { |
db082f59 | 1079 | /* Ensure that ULONGEST is big enough for reading 64-bit core files. */ |
451b7c33 TT |
1080 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
1081 | ||
db082f59 KB |
1082 | /* It's not required that the NT_FILE note exists, so return silently |
1083 | if it's not found. Beyond this point though, we'll complain | |
1084 | if problems are found. */ | |
1085 | asection *section = bfd_get_section_by_name (cbfd, ".note.linuxcore.file"); | |
1086 | if (section == nullptr) | |
1087 | return; | |
451b7c33 | 1088 | |
db082f59 KB |
1089 | unsigned int addr_size_bits = gdbarch_addr_bit (gdbarch); |
1090 | unsigned int addr_size = addr_size_bits / 8; | |
1091 | size_t note_size = bfd_section_size (section); | |
451b7c33 TT |
1092 | |
1093 | if (note_size < 2 * addr_size) | |
db082f59 KB |
1094 | { |
1095 | warning (_("malformed core note - too short for header")); | |
1096 | return; | |
1097 | } | |
451b7c33 | 1098 | |
db082f59 | 1099 | gdb::def_vector<gdb_byte> contents (note_size); |
9f584b37 TT |
1100 | if (!bfd_get_section_contents (core_bfd, section, contents.data (), |
1101 | 0, note_size)) | |
db082f59 KB |
1102 | { |
1103 | warning (_("could not get core note contents")); | |
1104 | return; | |
1105 | } | |
451b7c33 | 1106 | |
db082f59 KB |
1107 | gdb_byte *descdata = contents.data (); |
1108 | char *descend = (char *) descdata + note_size; | |
451b7c33 TT |
1109 | |
1110 | if (descdata[note_size - 1] != '\0') | |
db082f59 KB |
1111 | { |
1112 | warning (_("malformed note - does not end with \\0")); | |
1113 | return; | |
1114 | } | |
451b7c33 | 1115 | |
db082f59 | 1116 | ULONGEST count = bfd_get (addr_size_bits, core_bfd, descdata); |
451b7c33 TT |
1117 | descdata += addr_size; |
1118 | ||
db082f59 | 1119 | ULONGEST page_size = bfd_get (addr_size_bits, core_bfd, descdata); |
451b7c33 TT |
1120 | descdata += addr_size; |
1121 | ||
1122 | if (note_size < 2 * addr_size + count * 3 * addr_size) | |
451b7c33 | 1123 | { |
db082f59 KB |
1124 | warning (_("malformed note - too short for supplied file count")); |
1125 | return; | |
451b7c33 TT |
1126 | } |
1127 | ||
db082f59 KB |
1128 | char *filenames = (char *) descdata + count * 3 * addr_size; |
1129 | ||
1130 | /* Make sure that the correct number of filenames exist. Complain | |
1131 | if there aren't enough or are too many. */ | |
1132 | char *f = filenames; | |
1133 | for (int i = 0; i < count; i++) | |
451b7c33 | 1134 | { |
db082f59 KB |
1135 | if (f >= descend) |
1136 | { | |
1137 | warning (_("malformed note - filename area is too small")); | |
1138 | return; | |
1139 | } | |
1140 | f += strnlen (f, descend - f) + 1; | |
1141 | } | |
1142 | /* Complain, but don't return early if the filename area is too big. */ | |
1143 | if (f != descend) | |
1144 | warning (_("malformed note - filename area is too big")); | |
451b7c33 | 1145 | |
db082f59 | 1146 | pre_loop_cb (count); |
451b7c33 | 1147 | |
db082f59 KB |
1148 | for (int i = 0; i < count; i++) |
1149 | { | |
1150 | ULONGEST start = bfd_get (addr_size_bits, core_bfd, descdata); | |
451b7c33 | 1151 | descdata += addr_size; |
db082f59 | 1152 | ULONGEST end = bfd_get (addr_size_bits, core_bfd, descdata); |
451b7c33 | 1153 | descdata += addr_size; |
db082f59 KB |
1154 | ULONGEST file_ofs |
1155 | = bfd_get (addr_size_bits, core_bfd, descdata) * page_size; | |
451b7c33 | 1156 | descdata += addr_size; |
db082f59 KB |
1157 | char * filename = filenames; |
1158 | filenames += strlen ((char *) filenames) + 1; | |
451b7c33 | 1159 | |
db082f59 | 1160 | loop_cb (i, start, end, file_ofs, filename, nullptr); |
451b7c33 | 1161 | } |
451b7c33 TT |
1162 | } |
1163 | ||
db082f59 KB |
1164 | /* Implement "info proc mappings" for a corefile. */ |
1165 | ||
1166 | static void | |
1167 | linux_core_info_proc_mappings (struct gdbarch *gdbarch, const char *args) | |
1168 | { | |
1169 | linux_read_core_file_mappings (gdbarch, core_bfd, | |
1170 | [=] (ULONGEST count) | |
1171 | { | |
1172 | printf_filtered (_("Mapped address spaces:\n\n")); | |
1173 | if (gdbarch_addr_bit (gdbarch) == 32) | |
1174 | { | |
1175 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
1176 | "Start Addr", | |
1177 | " End Addr", | |
1178 | " Size", " Offset", "objfile"); | |
1179 | } | |
1180 | else | |
1181 | { | |
1182 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
1183 | "Start Addr", | |
1184 | " End Addr", | |
1185 | " Size", " Offset", "objfile"); | |
1186 | } | |
1187 | }, | |
1188 | [=] (int num, ULONGEST start, ULONGEST end, ULONGEST file_ofs, | |
1189 | const char *filename, const void *other) | |
1190 | { | |
1191 | if (gdbarch_addr_bit (gdbarch) == 32) | |
1192 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
1193 | paddress (gdbarch, start), | |
1194 | paddress (gdbarch, end), | |
1195 | hex_string (end - start), | |
1196 | hex_string (file_ofs), | |
1197 | filename); | |
1198 | else | |
1199 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
1200 | paddress (gdbarch, start), | |
1201 | paddress (gdbarch, end), | |
1202 | hex_string (end - start), | |
1203 | hex_string (file_ofs), | |
1204 | filename); | |
1205 | }); | |
1206 | } | |
1207 | ||
451b7c33 TT |
1208 | /* Implement "info proc" for a corefile. */ |
1209 | ||
1210 | static void | |
7bc112c1 | 1211 | linux_core_info_proc (struct gdbarch *gdbarch, const char *args, |
451b7c33 TT |
1212 | enum info_proc_what what) |
1213 | { | |
1214 | int exe_f = (what == IP_MINIMAL || what == IP_EXE || what == IP_ALL); | |
1215 | int mappings_f = (what == IP_MAPPINGS || what == IP_ALL); | |
1216 | ||
1217 | if (exe_f) | |
1218 | { | |
1219 | const char *exe; | |
1220 | ||
1221 | exe = bfd_core_file_failing_command (core_bfd); | |
1222 | if (exe != NULL) | |
1223 | printf_filtered ("exe = '%s'\n", exe); | |
1224 | else | |
1225 | warning (_("unable to find command name in core file")); | |
1226 | } | |
1227 | ||
1228 | if (mappings_f) | |
1229 | linux_core_info_proc_mappings (gdbarch, args); | |
1230 | ||
1231 | if (!exe_f && !mappings_f) | |
1232 | error (_("unable to handle request")); | |
1233 | } | |
1234 | ||
382b69bb JB |
1235 | /* Read siginfo data from the core, if possible. Returns -1 on |
1236 | failure. Otherwise, returns the number of bytes read. READBUF, | |
1237 | OFFSET, and LEN are all as specified by the to_xfer_partial | |
1238 | interface. */ | |
1239 | ||
1240 | static LONGEST | |
1241 | linux_core_xfer_siginfo (struct gdbarch *gdbarch, gdb_byte *readbuf, | |
1242 | ULONGEST offset, ULONGEST len) | |
1243 | { | |
1244 | thread_section_name section_name (".note.linuxcore.siginfo", inferior_ptid); | |
1245 | asection *section = bfd_get_section_by_name (core_bfd, section_name.c_str ()); | |
1246 | if (section == NULL) | |
1247 | return -1; | |
1248 | ||
1249 | if (!bfd_get_section_contents (core_bfd, section, readbuf, offset, len)) | |
1250 | return -1; | |
1251 | ||
1252 | return len; | |
1253 | } | |
1254 | ||
db1ff28b JK |
1255 | typedef int linux_find_memory_region_ftype (ULONGEST vaddr, ULONGEST size, |
1256 | ULONGEST offset, ULONGEST inode, | |
1257 | int read, int write, | |
1258 | int exec, int modified, | |
1259 | const char *filename, | |
1260 | void *data); | |
451b7c33 | 1261 | |
4ba11f89 KB |
1262 | typedef int linux_dump_mapping_p_ftype (filter_flags filterflags, |
1263 | const struct smaps_vmflags *v, | |
1264 | int maybe_private_p, | |
1265 | int mapping_anon_p, | |
1266 | int mapping_file_p, | |
1267 | const char *filename, | |
1268 | ULONGEST addr, | |
1269 | ULONGEST offset); | |
1270 | ||
db1ff28b | 1271 | /* List memory regions in the inferior for a corefile. */ |
451b7c33 TT |
1272 | |
1273 | static int | |
db1ff28b | 1274 | linux_find_memory_regions_full (struct gdbarch *gdbarch, |
4ba11f89 | 1275 | linux_dump_mapping_p_ftype *should_dump_mapping_p, |
db1ff28b JK |
1276 | linux_find_memory_region_ftype *func, |
1277 | void *obfd) | |
f7af1fcd | 1278 | { |
db1ff28b JK |
1279 | char mapsfilename[100]; |
1280 | char coredumpfilter_name[100]; | |
f7af1fcd JK |
1281 | pid_t pid; |
1282 | /* Default dump behavior of coredump_filter (0x33), according to | |
1283 | Documentation/filesystems/proc.txt from the Linux kernel | |
1284 | tree. */ | |
8d297bbf PA |
1285 | filter_flags filterflags = (COREFILTER_ANON_PRIVATE |
1286 | | COREFILTER_ANON_SHARED | |
1287 | | COREFILTER_ELF_HEADERS | |
1288 | | COREFILTER_HUGETLB_PRIVATE); | |
f7af1fcd | 1289 | |
db1ff28b | 1290 | /* We need to know the real target PID to access /proc. */ |
f7af1fcd | 1291 | if (current_inferior ()->fake_pid_p) |
db1ff28b | 1292 | return 1; |
f7af1fcd JK |
1293 | |
1294 | pid = current_inferior ()->pid; | |
1295 | ||
1296 | if (use_coredump_filter) | |
1297 | { | |
f7af1fcd JK |
1298 | xsnprintf (coredumpfilter_name, sizeof (coredumpfilter_name), |
1299 | "/proc/%d/coredump_filter", pid); | |
87028b87 TT |
1300 | gdb::unique_xmalloc_ptr<char> coredumpfilterdata |
1301 | = target_fileio_read_stralloc (NULL, coredumpfilter_name); | |
f7af1fcd JK |
1302 | if (coredumpfilterdata != NULL) |
1303 | { | |
8d297bbf PA |
1304 | unsigned int flags; |
1305 | ||
87028b87 | 1306 | sscanf (coredumpfilterdata.get (), "%x", &flags); |
8d297bbf | 1307 | filterflags = (enum filter_flag) flags; |
f7af1fcd JK |
1308 | } |
1309 | } | |
1310 | ||
db1ff28b | 1311 | xsnprintf (mapsfilename, sizeof mapsfilename, "/proc/%d/smaps", pid); |
87028b87 TT |
1312 | gdb::unique_xmalloc_ptr<char> data |
1313 | = target_fileio_read_stralloc (NULL, mapsfilename); | |
db1ff28b JK |
1314 | if (data == NULL) |
1315 | { | |
1316 | /* Older Linux kernels did not support /proc/PID/smaps. */ | |
1317 | xsnprintf (mapsfilename, sizeof mapsfilename, "/proc/%d/maps", pid); | |
1318 | data = target_fileio_read_stralloc (NULL, mapsfilename); | |
1319 | } | |
1320 | ||
1321 | if (data != NULL) | |
1322 | { | |
db1ff28b JK |
1323 | char *line, *t; |
1324 | ||
87028b87 | 1325 | line = strtok_r (data.get (), "\n", &t); |
db1ff28b JK |
1326 | while (line != NULL) |
1327 | { | |
1328 | ULONGEST addr, endaddr, offset, inode; | |
1329 | const char *permissions, *device, *filename; | |
1330 | struct smaps_vmflags v; | |
1331 | size_t permissions_len, device_len; | |
1332 | int read, write, exec, priv; | |
1333 | int has_anonymous = 0; | |
1334 | int should_dump_p = 0; | |
1335 | int mapping_anon_p; | |
1336 | int mapping_file_p; | |
1337 | ||
1338 | memset (&v, 0, sizeof (v)); | |
1339 | read_mapping (line, &addr, &endaddr, &permissions, &permissions_len, | |
1340 | &offset, &device, &device_len, &inode, &filename); | |
1341 | mapping_anon_p = mapping_is_anonymous_p (filename); | |
1342 | /* If the mapping is not anonymous, then we can consider it | |
1343 | to be file-backed. These two states (anonymous or | |
1344 | file-backed) seem to be exclusive, but they can actually | |
1345 | coexist. For example, if a file-backed mapping has | |
1346 | "Anonymous:" pages (see more below), then the Linux | |
1347 | kernel will dump this mapping when the user specified | |
1348 | that she only wants anonymous mappings in the corefile | |
1349 | (*even* when she explicitly disabled the dumping of | |
1350 | file-backed mappings). */ | |
1351 | mapping_file_p = !mapping_anon_p; | |
1352 | ||
1353 | /* Decode permissions. */ | |
1354 | read = (memchr (permissions, 'r', permissions_len) != 0); | |
1355 | write = (memchr (permissions, 'w', permissions_len) != 0); | |
1356 | exec = (memchr (permissions, 'x', permissions_len) != 0); | |
1357 | /* 'private' here actually means VM_MAYSHARE, and not | |
1358 | VM_SHARED. In order to know if a mapping is really | |
1359 | private or not, we must check the flag "sh" in the | |
1360 | VmFlags field. This is done by decode_vmflags. However, | |
1361 | if we are using a Linux kernel released before the commit | |
1362 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10), we will | |
1363 | not have the VmFlags there. In this case, there is | |
1364 | really no way to know if we are dealing with VM_SHARED, | |
1365 | so we just assume that VM_MAYSHARE is enough. */ | |
1366 | priv = memchr (permissions, 'p', permissions_len) != 0; | |
1367 | ||
1368 | /* Try to detect if region should be dumped by parsing smaps | |
1369 | counters. */ | |
1370 | for (line = strtok_r (NULL, "\n", &t); | |
1371 | line != NULL && line[0] >= 'A' && line[0] <= 'Z'; | |
1372 | line = strtok_r (NULL, "\n", &t)) | |
1373 | { | |
1374 | char keyword[64 + 1]; | |
1375 | ||
1376 | if (sscanf (line, "%64s", keyword) != 1) | |
1377 | { | |
1378 | warning (_("Error parsing {s,}maps file '%s'"), mapsfilename); | |
1379 | break; | |
1380 | } | |
1381 | ||
1382 | if (strcmp (keyword, "Anonymous:") == 0) | |
1383 | { | |
1384 | /* Older Linux kernels did not support the | |
1385 | "Anonymous:" counter. Check it here. */ | |
1386 | has_anonymous = 1; | |
1387 | } | |
1388 | else if (strcmp (keyword, "VmFlags:") == 0) | |
1389 | decode_vmflags (line, &v); | |
1390 | ||
1391 | if (strcmp (keyword, "AnonHugePages:") == 0 | |
1392 | || strcmp (keyword, "Anonymous:") == 0) | |
1393 | { | |
1394 | unsigned long number; | |
1395 | ||
1396 | if (sscanf (line, "%*s%lu", &number) != 1) | |
1397 | { | |
1398 | warning (_("Error parsing {s,}maps file '%s' number"), | |
1399 | mapsfilename); | |
1400 | break; | |
1401 | } | |
1402 | if (number > 0) | |
1403 | { | |
1404 | /* Even if we are dealing with a file-backed | |
1405 | mapping, if it contains anonymous pages we | |
1406 | consider it to be *also* an anonymous | |
1407 | mapping, because this is what the Linux | |
1408 | kernel does: | |
1409 | ||
1410 | // Dump segments that have been written to. | |
1411 | if (vma->anon_vma && FILTER(ANON_PRIVATE)) | |
1412 | goto whole; | |
1413 | ||
1414 | Note that if the mapping is already marked as | |
1415 | file-backed (i.e., mapping_file_p is | |
1416 | non-zero), then this is a special case, and | |
1417 | this mapping will be dumped either when the | |
1418 | user wants to dump file-backed *or* anonymous | |
1419 | mappings. */ | |
1420 | mapping_anon_p = 1; | |
1421 | } | |
1422 | } | |
1423 | } | |
1424 | ||
1425 | if (has_anonymous) | |
4ba11f89 KB |
1426 | should_dump_p = should_dump_mapping_p (filterflags, &v, priv, |
1427 | mapping_anon_p, | |
1428 | mapping_file_p, | |
1429 | filename, addr, offset); | |
db1ff28b JK |
1430 | else |
1431 | { | |
1432 | /* Older Linux kernels did not support the "Anonymous:" counter. | |
1433 | If it is missing, we can't be sure - dump all the pages. */ | |
1434 | should_dump_p = 1; | |
1435 | } | |
1436 | ||
1437 | /* Invoke the callback function to create the corefile segment. */ | |
1438 | if (should_dump_p) | |
1439 | func (addr, endaddr - addr, offset, inode, | |
1440 | read, write, exec, 1, /* MODIFIED is true because we | |
1441 | want to dump the mapping. */ | |
1442 | filename, obfd); | |
1443 | } | |
1444 | ||
db1ff28b JK |
1445 | return 0; |
1446 | } | |
1447 | ||
1448 | return 1; | |
1449 | } | |
1450 | ||
1451 | /* A structure for passing information through | |
1452 | linux_find_memory_regions_full. */ | |
1453 | ||
1454 | struct linux_find_memory_regions_data | |
1455 | { | |
1456 | /* The original callback. */ | |
1457 | ||
1458 | find_memory_region_ftype func; | |
1459 | ||
1460 | /* The original datum. */ | |
1461 | ||
1462 | void *obfd; | |
1463 | }; | |
1464 | ||
1465 | /* A callback for linux_find_memory_regions that converts between the | |
1466 | "full"-style callback and find_memory_region_ftype. */ | |
1467 | ||
1468 | static int | |
1469 | linux_find_memory_regions_thunk (ULONGEST vaddr, ULONGEST size, | |
1470 | ULONGEST offset, ULONGEST inode, | |
1471 | int read, int write, int exec, int modified, | |
1472 | const char *filename, void *arg) | |
1473 | { | |
9a3c8263 SM |
1474 | struct linux_find_memory_regions_data *data |
1475 | = (struct linux_find_memory_regions_data *) arg; | |
db1ff28b JK |
1476 | |
1477 | return data->func (vaddr, size, read, write, exec, modified, data->obfd); | |
451b7c33 TT |
1478 | } |
1479 | ||
1480 | /* A variant of linux_find_memory_regions_full that is suitable as the | |
1481 | gdbarch find_memory_regions method. */ | |
1482 | ||
1483 | static int | |
1484 | linux_find_memory_regions (struct gdbarch *gdbarch, | |
db1ff28b | 1485 | find_memory_region_ftype func, void *obfd) |
451b7c33 TT |
1486 | { |
1487 | struct linux_find_memory_regions_data data; | |
1488 | ||
1489 | data.func = func; | |
db1ff28b | 1490 | data.obfd = obfd; |
451b7c33 | 1491 | |
db1ff28b | 1492 | return linux_find_memory_regions_full (gdbarch, |
4ba11f89 | 1493 | dump_mapping_p, |
db1ff28b JK |
1494 | linux_find_memory_regions_thunk, |
1495 | &data); | |
451b7c33 TT |
1496 | } |
1497 | ||
451b7c33 TT |
1498 | /* This is used to pass information from |
1499 | linux_make_mappings_corefile_notes through | |
1500 | linux_find_memory_regions_full. */ | |
1501 | ||
1502 | struct linux_make_mappings_data | |
1503 | { | |
1504 | /* Number of files mapped. */ | |
1505 | ULONGEST file_count; | |
1506 | ||
1507 | /* The obstack for the main part of the data. */ | |
1508 | struct obstack *data_obstack; | |
1509 | ||
1510 | /* The filename obstack. */ | |
1511 | struct obstack *filename_obstack; | |
1512 | ||
1513 | /* The architecture's "long" type. */ | |
1514 | struct type *long_type; | |
1515 | }; | |
1516 | ||
1517 | static linux_find_memory_region_ftype linux_make_mappings_callback; | |
1518 | ||
1519 | /* A callback for linux_find_memory_regions_full that updates the | |
1520 | mappings data for linux_make_mappings_corefile_notes. */ | |
1521 | ||
1522 | static int | |
1523 | linux_make_mappings_callback (ULONGEST vaddr, ULONGEST size, | |
1524 | ULONGEST offset, ULONGEST inode, | |
1525 | int read, int write, int exec, int modified, | |
1526 | const char *filename, void *data) | |
1527 | { | |
9a3c8263 SM |
1528 | struct linux_make_mappings_data *map_data |
1529 | = (struct linux_make_mappings_data *) data; | |
451b7c33 TT |
1530 | gdb_byte buf[sizeof (ULONGEST)]; |
1531 | ||
1532 | if (*filename == '\0' || inode == 0) | |
1533 | return 0; | |
1534 | ||
1535 | ++map_data->file_count; | |
1536 | ||
1537 | pack_long (buf, map_data->long_type, vaddr); | |
1538 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1539 | pack_long (buf, map_data->long_type, vaddr + size); | |
1540 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1541 | pack_long (buf, map_data->long_type, offset); | |
1542 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1543 | ||
1544 | obstack_grow_str0 (map_data->filename_obstack, filename); | |
1545 | ||
1546 | return 0; | |
1547 | } | |
1548 | ||
1549 | /* Write the file mapping data to the core file, if possible. OBFD is | |
1550 | the output BFD. NOTE_DATA is the current note data, and NOTE_SIZE | |
1551 | is a pointer to the note size. Returns the new NOTE_DATA and | |
1552 | updates NOTE_SIZE. */ | |
1553 | ||
1554 | static char * | |
1555 | linux_make_mappings_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, | |
1556 | char *note_data, int *note_size) | |
1557 | { | |
451b7c33 TT |
1558 | struct linux_make_mappings_data mapping_data; |
1559 | struct type *long_type | |
1560 | = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), 0, "long"); | |
1561 | gdb_byte buf[sizeof (ULONGEST)]; | |
1562 | ||
8268c778 | 1563 | auto_obstack data_obstack, filename_obstack; |
451b7c33 TT |
1564 | |
1565 | mapping_data.file_count = 0; | |
1566 | mapping_data.data_obstack = &data_obstack; | |
1567 | mapping_data.filename_obstack = &filename_obstack; | |
1568 | mapping_data.long_type = long_type; | |
1569 | ||
1570 | /* Reserve space for the count. */ | |
1571 | obstack_blank (&data_obstack, TYPE_LENGTH (long_type)); | |
1572 | /* We always write the page size as 1 since we have no good way to | |
1573 | determine the correct value. */ | |
1574 | pack_long (buf, long_type, 1); | |
1575 | obstack_grow (&data_obstack, buf, TYPE_LENGTH (long_type)); | |
1576 | ||
4ba11f89 KB |
1577 | linux_find_memory_regions_full (gdbarch, |
1578 | dump_note_entry_p, | |
1579 | linux_make_mappings_callback, | |
db1ff28b | 1580 | &mapping_data); |
451b7c33 TT |
1581 | |
1582 | if (mapping_data.file_count != 0) | |
1583 | { | |
1584 | /* Write the count to the obstack. */ | |
51a5cd90 PA |
1585 | pack_long ((gdb_byte *) obstack_base (&data_obstack), |
1586 | long_type, mapping_data.file_count); | |
451b7c33 TT |
1587 | |
1588 | /* Copy the filenames to the data obstack. */ | |
3fba72f7 | 1589 | int size = obstack_object_size (&filename_obstack); |
451b7c33 | 1590 | obstack_grow (&data_obstack, obstack_base (&filename_obstack), |
3fba72f7 | 1591 | size); |
451b7c33 TT |
1592 | |
1593 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
1594 | "CORE", NT_FILE, | |
1595 | obstack_base (&data_obstack), | |
1596 | obstack_object_size (&data_obstack)); | |
1597 | } | |
1598 | ||
451b7c33 TT |
1599 | return note_data; |
1600 | } | |
1601 | ||
5aa82d05 AA |
1602 | /* Structure for passing information from |
1603 | linux_collect_thread_registers via an iterator to | |
1604 | linux_collect_regset_section_cb. */ | |
1605 | ||
1606 | struct linux_collect_regset_section_cb_data | |
1607 | { | |
1608 | struct gdbarch *gdbarch; | |
1609 | const struct regcache *regcache; | |
1610 | bfd *obfd; | |
1611 | char *note_data; | |
1612 | int *note_size; | |
1613 | unsigned long lwp; | |
1614 | enum gdb_signal stop_signal; | |
1615 | int abort_iteration; | |
1616 | }; | |
1617 | ||
1618 | /* Callback for iterate_over_regset_sections that records a single | |
1619 | regset in the corefile note section. */ | |
1620 | ||
1621 | static void | |
a616bb94 AH |
1622 | linux_collect_regset_section_cb (const char *sect_name, int supply_size, |
1623 | int collect_size, const struct regset *regset, | |
5aa82d05 AA |
1624 | const char *human_name, void *cb_data) |
1625 | { | |
7567e115 SM |
1626 | struct linux_collect_regset_section_cb_data *data |
1627 | = (struct linux_collect_regset_section_cb_data *) cb_data; | |
a616bb94 AH |
1628 | bool variable_size_section = (regset != NULL |
1629 | && regset->flags & REGSET_VARIABLE_SIZE); | |
1630 | ||
1631 | if (!variable_size_section) | |
1632 | gdb_assert (supply_size == collect_size); | |
5aa82d05 AA |
1633 | |
1634 | if (data->abort_iteration) | |
1635 | return; | |
1636 | ||
5aa82d05 AA |
1637 | gdb_assert (regset && regset->collect_regset); |
1638 | ||
afde3032 PFC |
1639 | /* This is intentionally zero-initialized by using std::vector, so |
1640 | that any padding bytes in the core file will show as 0. */ | |
1641 | std::vector<gdb_byte> buf (collect_size); | |
1642 | ||
1643 | regset->collect_regset (regset, data->regcache, -1, buf.data (), | |
1644 | collect_size); | |
5aa82d05 AA |
1645 | |
1646 | /* PRSTATUS still needs to be treated specially. */ | |
1647 | if (strcmp (sect_name, ".reg") == 0) | |
1648 | data->note_data = (char *) elfcore_write_prstatus | |
1649 | (data->obfd, data->note_data, data->note_size, data->lwp, | |
afde3032 | 1650 | gdb_signal_to_host (data->stop_signal), buf.data ()); |
5aa82d05 AA |
1651 | else |
1652 | data->note_data = (char *) elfcore_write_register_note | |
1653 | (data->obfd, data->note_data, data->note_size, | |
afde3032 | 1654 | sect_name, buf.data (), collect_size); |
5aa82d05 AA |
1655 | |
1656 | if (data->note_data == NULL) | |
1657 | data->abort_iteration = 1; | |
1658 | } | |
1659 | ||
6432734d UW |
1660 | /* Records the thread's register state for the corefile note |
1661 | section. */ | |
1662 | ||
1663 | static char * | |
1664 | linux_collect_thread_registers (const struct regcache *regcache, | |
1665 | ptid_t ptid, bfd *obfd, | |
1666 | char *note_data, int *note_size, | |
2ea28649 | 1667 | enum gdb_signal stop_signal) |
6432734d | 1668 | { |
ac7936df | 1669 | struct gdbarch *gdbarch = regcache->arch (); |
5aa82d05 | 1670 | struct linux_collect_regset_section_cb_data data; |
6432734d | 1671 | |
5aa82d05 AA |
1672 | data.gdbarch = gdbarch; |
1673 | data.regcache = regcache; | |
1674 | data.obfd = obfd; | |
1675 | data.note_data = note_data; | |
1676 | data.note_size = note_size; | |
1677 | data.stop_signal = stop_signal; | |
1678 | data.abort_iteration = 0; | |
6432734d UW |
1679 | |
1680 | /* For remote targets the LWP may not be available, so use the TID. */ | |
e38504b3 | 1681 | data.lwp = ptid.lwp (); |
5aa82d05 | 1682 | if (!data.lwp) |
cc6bcb54 | 1683 | data.lwp = ptid.tid (); |
5aa82d05 AA |
1684 | |
1685 | gdbarch_iterate_over_regset_sections (gdbarch, | |
1686 | linux_collect_regset_section_cb, | |
1687 | &data, regcache); | |
1688 | return data.note_data; | |
6432734d UW |
1689 | } |
1690 | ||
2989a365 | 1691 | /* Fetch the siginfo data for the specified thread, if it exists. If |
9f584b37 TT |
1692 | there is no data, or we could not read it, return an empty |
1693 | buffer. */ | |
1694 | ||
1695 | static gdb::byte_vector | |
1696 | linux_get_siginfo_data (thread_info *thread, struct gdbarch *gdbarch) | |
9015683b TT |
1697 | { |
1698 | struct type *siginfo_type; | |
9015683b | 1699 | LONGEST bytes_read; |
9015683b TT |
1700 | |
1701 | if (!gdbarch_get_siginfo_type_p (gdbarch)) | |
9f584b37 TT |
1702 | return gdb::byte_vector (); |
1703 | ||
41792d68 PA |
1704 | scoped_restore_current_thread save_current_thread; |
1705 | switch_to_thread (thread); | |
2989a365 | 1706 | |
9015683b TT |
1707 | siginfo_type = gdbarch_get_siginfo_type (gdbarch); |
1708 | ||
9f584b37 | 1709 | gdb::byte_vector buf (TYPE_LENGTH (siginfo_type)); |
9015683b | 1710 | |
8b88a78e | 1711 | bytes_read = target_read (current_top_target (), TARGET_OBJECT_SIGNAL_INFO, NULL, |
9f584b37 TT |
1712 | buf.data (), 0, TYPE_LENGTH (siginfo_type)); |
1713 | if (bytes_read != TYPE_LENGTH (siginfo_type)) | |
1714 | buf.clear (); | |
9015683b TT |
1715 | |
1716 | return buf; | |
1717 | } | |
1718 | ||
6432734d UW |
1719 | struct linux_corefile_thread_data |
1720 | { | |
1721 | struct gdbarch *gdbarch; | |
6432734d UW |
1722 | bfd *obfd; |
1723 | char *note_data; | |
1724 | int *note_size; | |
2ea28649 | 1725 | enum gdb_signal stop_signal; |
6432734d UW |
1726 | }; |
1727 | ||
050c224b PA |
1728 | /* Records the thread's register state for the corefile note |
1729 | section. */ | |
6432734d | 1730 | |
050c224b PA |
1731 | static void |
1732 | linux_corefile_thread (struct thread_info *info, | |
1733 | struct linux_corefile_thread_data *args) | |
6432734d | 1734 | { |
050c224b | 1735 | struct regcache *regcache; |
050c224b | 1736 | |
5b6d1e4f PA |
1737 | regcache = get_thread_arch_regcache (info->inf->process_target (), |
1738 | info->ptid, args->gdbarch); | |
050c224b | 1739 | |
050c224b | 1740 | target_fetch_registers (regcache, -1); |
9f584b37 | 1741 | gdb::byte_vector siginfo_data = linux_get_siginfo_data (info, args->gdbarch); |
050c224b PA |
1742 | |
1743 | args->note_data = linux_collect_thread_registers | |
1744 | (regcache, info->ptid, args->obfd, args->note_data, | |
1745 | args->note_size, args->stop_signal); | |
1746 | ||
1747 | /* Don't return anything if we got no register information above, | |
1748 | such a core file is useless. */ | |
1749 | if (args->note_data != NULL) | |
9f584b37 | 1750 | if (!siginfo_data.empty ()) |
050c224b PA |
1751 | args->note_data = elfcore_write_note (args->obfd, |
1752 | args->note_data, | |
1753 | args->note_size, | |
1754 | "CORE", NT_SIGINFO, | |
9f584b37 TT |
1755 | siginfo_data.data (), |
1756 | siginfo_data.size ()); | |
6432734d UW |
1757 | } |
1758 | ||
b3ac9c77 SDJ |
1759 | /* Fill the PRPSINFO structure with information about the process being |
1760 | debugged. Returns 1 in case of success, 0 for failures. Please note that | |
1761 | even if the structure cannot be entirely filled (e.g., GDB was unable to | |
1762 | gather information about the process UID/GID), this function will still | |
1763 | return 1 since some information was already recorded. It will only return | |
1764 | 0 iff nothing can be gathered. */ | |
1765 | ||
1766 | static int | |
1767 | linux_fill_prpsinfo (struct elf_internal_linux_prpsinfo *p) | |
1768 | { | |
1769 | /* The filename which we will use to obtain some info about the process. | |
1770 | We will basically use this to store the `/proc/PID/FILENAME' file. */ | |
1771 | char filename[100]; | |
b3ac9c77 SDJ |
1772 | /* The basename of the executable. */ |
1773 | const char *basename; | |
cbaaa0ca | 1774 | const char *infargs; |
b3ac9c77 SDJ |
1775 | /* Temporary buffer. */ |
1776 | char *tmpstr; | |
1777 | /* The valid states of a process, according to the Linux kernel. */ | |
1778 | const char valid_states[] = "RSDTZW"; | |
1779 | /* The program state. */ | |
1780 | const char *prog_state; | |
1781 | /* The state of the process. */ | |
1782 | char pr_sname; | |
1783 | /* The PID of the program which generated the corefile. */ | |
1784 | pid_t pid; | |
1785 | /* Process flags. */ | |
1786 | unsigned int pr_flag; | |
1787 | /* Process nice value. */ | |
1788 | long pr_nice; | |
1789 | /* The number of fields read by `sscanf'. */ | |
1790 | int n_fields = 0; | |
b3ac9c77 SDJ |
1791 | |
1792 | gdb_assert (p != NULL); | |
1793 | ||
1794 | /* Obtaining PID and filename. */ | |
e99b03dc | 1795 | pid = inferior_ptid.pid (); |
b3ac9c77 | 1796 | xsnprintf (filename, sizeof (filename), "/proc/%d/cmdline", (int) pid); |
87028b87 TT |
1797 | /* The full name of the program which generated the corefile. */ |
1798 | gdb::unique_xmalloc_ptr<char> fname | |
1799 | = target_fileio_read_stralloc (NULL, filename); | |
b3ac9c77 | 1800 | |
87028b87 | 1801 | if (fname == NULL || fname.get ()[0] == '\0') |
b3ac9c77 SDJ |
1802 | { |
1803 | /* No program name was read, so we won't be able to retrieve more | |
1804 | information about the process. */ | |
b3ac9c77 SDJ |
1805 | return 0; |
1806 | } | |
1807 | ||
b3ac9c77 SDJ |
1808 | memset (p, 0, sizeof (*p)); |
1809 | ||
1810 | /* Defining the PID. */ | |
1811 | p->pr_pid = pid; | |
1812 | ||
1813 | /* Copying the program name. Only the basename matters. */ | |
87028b87 | 1814 | basename = lbasename (fname.get ()); |
f67210ff | 1815 | strncpy (p->pr_fname, basename, sizeof (p->pr_fname) - 1); |
b3ac9c77 SDJ |
1816 | p->pr_fname[sizeof (p->pr_fname) - 1] = '\0'; |
1817 | ||
1818 | infargs = get_inferior_args (); | |
1819 | ||
87028b87 TT |
1820 | /* The arguments of the program. */ |
1821 | std::string psargs = fname.get (); | |
b3ac9c77 | 1822 | if (infargs != NULL) |
87028b87 | 1823 | psargs = psargs + " " + infargs; |
b3ac9c77 | 1824 | |
f67210ff | 1825 | strncpy (p->pr_psargs, psargs.c_str (), sizeof (p->pr_psargs) - 1); |
b3ac9c77 SDJ |
1826 | p->pr_psargs[sizeof (p->pr_psargs) - 1] = '\0'; |
1827 | ||
1828 | xsnprintf (filename, sizeof (filename), "/proc/%d/stat", (int) pid); | |
87028b87 TT |
1829 | /* The contents of `/proc/PID/stat'. */ |
1830 | gdb::unique_xmalloc_ptr<char> proc_stat_contents | |
1831 | = target_fileio_read_stralloc (NULL, filename); | |
1832 | char *proc_stat = proc_stat_contents.get (); | |
b3ac9c77 SDJ |
1833 | |
1834 | if (proc_stat == NULL || *proc_stat == '\0') | |
1835 | { | |
1836 | /* Despite being unable to read more information about the | |
1837 | process, we return 1 here because at least we have its | |
1838 | command line, PID and arguments. */ | |
b3ac9c77 SDJ |
1839 | return 1; |
1840 | } | |
1841 | ||
1842 | /* Ok, we have the stats. It's time to do a little parsing of the | |
1843 | contents of the buffer, so that we end up reading what we want. | |
1844 | ||
1845 | The following parsing mechanism is strongly based on the | |
1846 | information generated by the `fs/proc/array.c' file, present in | |
1847 | the Linux kernel tree. More details about how the information is | |
1848 | displayed can be obtained by seeing the manpage of proc(5), | |
1849 | specifically under the entry of `/proc/[pid]/stat'. */ | |
1850 | ||
1851 | /* Getting rid of the PID, since we already have it. */ | |
1852 | while (isdigit (*proc_stat)) | |
1853 | ++proc_stat; | |
1854 | ||
1855 | proc_stat = skip_spaces (proc_stat); | |
1856 | ||
184cd072 JK |
1857 | /* ps command also relies on no trailing fields ever contain ')'. */ |
1858 | proc_stat = strrchr (proc_stat, ')'); | |
1859 | if (proc_stat == NULL) | |
87028b87 | 1860 | return 1; |
184cd072 | 1861 | proc_stat++; |
b3ac9c77 SDJ |
1862 | |
1863 | proc_stat = skip_spaces (proc_stat); | |
1864 | ||
1865 | n_fields = sscanf (proc_stat, | |
1866 | "%c" /* Process state. */ | |
1867 | "%d%d%d" /* Parent PID, group ID, session ID. */ | |
1868 | "%*d%*d" /* tty_nr, tpgid (not used). */ | |
1869 | "%u" /* Flags. */ | |
1870 | "%*s%*s%*s%*s" /* minflt, cminflt, majflt, | |
1871 | cmajflt (not used). */ | |
1872 | "%*s%*s%*s%*s" /* utime, stime, cutime, | |
1873 | cstime (not used). */ | |
1874 | "%*s" /* Priority (not used). */ | |
1875 | "%ld", /* Nice. */ | |
1876 | &pr_sname, | |
1877 | &p->pr_ppid, &p->pr_pgrp, &p->pr_sid, | |
1878 | &pr_flag, | |
1879 | &pr_nice); | |
1880 | ||
1881 | if (n_fields != 6) | |
1882 | { | |
1883 | /* Again, we couldn't read the complementary information about | |
1884 | the process state. However, we already have minimal | |
1885 | information, so we just return 1 here. */ | |
b3ac9c77 SDJ |
1886 | return 1; |
1887 | } | |
1888 | ||
1889 | /* Filling the structure fields. */ | |
1890 | prog_state = strchr (valid_states, pr_sname); | |
1891 | if (prog_state != NULL) | |
1892 | p->pr_state = prog_state - valid_states; | |
1893 | else | |
1894 | { | |
1895 | /* Zero means "Running". */ | |
1896 | p->pr_state = 0; | |
1897 | } | |
1898 | ||
1899 | p->pr_sname = p->pr_state > 5 ? '.' : pr_sname; | |
1900 | p->pr_zomb = p->pr_sname == 'Z'; | |
1901 | p->pr_nice = pr_nice; | |
1902 | p->pr_flag = pr_flag; | |
1903 | ||
1904 | /* Finally, obtaining the UID and GID. For that, we read and parse the | |
1905 | contents of the `/proc/PID/status' file. */ | |
1906 | xsnprintf (filename, sizeof (filename), "/proc/%d/status", (int) pid); | |
87028b87 TT |
1907 | /* The contents of `/proc/PID/status'. */ |
1908 | gdb::unique_xmalloc_ptr<char> proc_status_contents | |
1909 | = target_fileio_read_stralloc (NULL, filename); | |
1910 | char *proc_status = proc_status_contents.get (); | |
b3ac9c77 SDJ |
1911 | |
1912 | if (proc_status == NULL || *proc_status == '\0') | |
1913 | { | |
1914 | /* Returning 1 since we already have a bunch of information. */ | |
b3ac9c77 SDJ |
1915 | return 1; |
1916 | } | |
1917 | ||
1918 | /* Extracting the UID. */ | |
1919 | tmpstr = strstr (proc_status, "Uid:"); | |
1920 | if (tmpstr != NULL) | |
1921 | { | |
1922 | /* Advancing the pointer to the beginning of the UID. */ | |
1923 | tmpstr += sizeof ("Uid:"); | |
1924 | while (*tmpstr != '\0' && !isdigit (*tmpstr)) | |
1925 | ++tmpstr; | |
1926 | ||
1927 | if (isdigit (*tmpstr)) | |
1928 | p->pr_uid = strtol (tmpstr, &tmpstr, 10); | |
1929 | } | |
1930 | ||
1931 | /* Extracting the GID. */ | |
1932 | tmpstr = strstr (proc_status, "Gid:"); | |
1933 | if (tmpstr != NULL) | |
1934 | { | |
1935 | /* Advancing the pointer to the beginning of the GID. */ | |
1936 | tmpstr += sizeof ("Gid:"); | |
1937 | while (*tmpstr != '\0' && !isdigit (*tmpstr)) | |
1938 | ++tmpstr; | |
1939 | ||
1940 | if (isdigit (*tmpstr)) | |
1941 | p->pr_gid = strtol (tmpstr, &tmpstr, 10); | |
1942 | } | |
1943 | ||
b3ac9c77 SDJ |
1944 | return 1; |
1945 | } | |
1946 | ||
8df01799 PA |
1947 | /* Find the signalled thread. In case there's more than one signalled |
1948 | thread, prefer the current thread, if it is signalled. If no | |
1949 | thread was signalled, default to the current thread, unless it has | |
1950 | exited, in which case return NULL. */ | |
1951 | ||
1952 | static thread_info * | |
1953 | find_signalled_thread () | |
1954 | { | |
1955 | thread_info *curr_thr = inferior_thread (); | |
1956 | if (curr_thr->state != THREAD_EXITED | |
1957 | && curr_thr->suspend.stop_signal != GDB_SIGNAL_0) | |
1958 | return curr_thr; | |
1959 | ||
1960 | for (thread_info *thr : current_inferior ()->non_exited_threads ()) | |
1961 | if (thr->suspend.stop_signal != GDB_SIGNAL_0) | |
1962 | return thr; | |
1963 | ||
1964 | /* Default to the current thread, unless it has exited. */ | |
1965 | if (curr_thr->state != THREAD_EXITED) | |
1966 | return curr_thr; | |
1967 | ||
1968 | return nullptr; | |
1969 | } | |
1970 | ||
f968fe80 AA |
1971 | /* Build the note section for a corefile, and return it in a malloc |
1972 | buffer. */ | |
6432734d | 1973 | |
f968fe80 AA |
1974 | static char * |
1975 | linux_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size) | |
6432734d UW |
1976 | { |
1977 | struct linux_corefile_thread_data thread_args; | |
b3ac9c77 | 1978 | struct elf_internal_linux_prpsinfo prpsinfo; |
6432734d | 1979 | char *note_data = NULL; |
6432734d | 1980 | |
f968fe80 AA |
1981 | if (! gdbarch_iterate_over_regset_sections_p (gdbarch)) |
1982 | return NULL; | |
1983 | ||
b3ac9c77 | 1984 | if (linux_fill_prpsinfo (&prpsinfo)) |
6432734d | 1985 | { |
fe220226 MR |
1986 | if (gdbarch_ptr_bit (gdbarch) == 64) |
1987 | note_data = elfcore_write_linux_prpsinfo64 (obfd, | |
1988 | note_data, note_size, | |
1989 | &prpsinfo); | |
b3ac9c77 | 1990 | else |
fe220226 MR |
1991 | note_data = elfcore_write_linux_prpsinfo32 (obfd, |
1992 | note_data, note_size, | |
1993 | &prpsinfo); | |
6432734d UW |
1994 | } |
1995 | ||
1996 | /* Thread register information. */ | |
a70b8144 | 1997 | try |
22fd09ae JK |
1998 | { |
1999 | update_thread_list (); | |
2000 | } | |
230d2906 | 2001 | catch (const gdb_exception_error &e) |
492d29ea PA |
2002 | { |
2003 | exception_print (gdb_stderr, e); | |
2004 | } | |
492d29ea | 2005 | |
050c224b | 2006 | /* Like the kernel, prefer dumping the signalled thread first. |
8df01799 PA |
2007 | "First thread" is what tools use to infer the signalled |
2008 | thread. */ | |
2009 | thread_info *signalled_thr = find_signalled_thread (); | |
050c224b | 2010 | |
6432734d | 2011 | thread_args.gdbarch = gdbarch; |
6432734d UW |
2012 | thread_args.obfd = obfd; |
2013 | thread_args.note_data = note_data; | |
2014 | thread_args.note_size = note_size; | |
8df01799 PA |
2015 | if (signalled_thr != nullptr) |
2016 | thread_args.stop_signal = signalled_thr->suspend.stop_signal; | |
2017 | else | |
2018 | thread_args.stop_signal = GDB_SIGNAL_0; | |
050c224b | 2019 | |
8df01799 PA |
2020 | if (signalled_thr != nullptr) |
2021 | linux_corefile_thread (signalled_thr, &thread_args); | |
08036331 | 2022 | for (thread_info *thr : current_inferior ()->non_exited_threads ()) |
050c224b PA |
2023 | { |
2024 | if (thr == signalled_thr) | |
2025 | continue; | |
050c224b PA |
2026 | |
2027 | linux_corefile_thread (thr, &thread_args); | |
2028 | } | |
2029 | ||
6432734d UW |
2030 | note_data = thread_args.note_data; |
2031 | if (!note_data) | |
2032 | return NULL; | |
2033 | ||
2034 | /* Auxillary vector. */ | |
9018be22 | 2035 | gdb::optional<gdb::byte_vector> auxv = |
8b88a78e | 2036 | target_read_alloc (current_top_target (), TARGET_OBJECT_AUXV, NULL); |
9018be22 | 2037 | if (auxv && !auxv->empty ()) |
6432734d UW |
2038 | { |
2039 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
9018be22 SM |
2040 | "CORE", NT_AUXV, auxv->data (), |
2041 | auxv->size ()); | |
6432734d UW |
2042 | |
2043 | if (!note_data) | |
2044 | return NULL; | |
2045 | } | |
2046 | ||
451b7c33 TT |
2047 | /* File mappings. */ |
2048 | note_data = linux_make_mappings_corefile_notes (gdbarch, obfd, | |
2049 | note_data, note_size); | |
2050 | ||
6432734d UW |
2051 | return note_data; |
2052 | } | |
2053 | ||
eb14d406 SDJ |
2054 | /* Implementation of `gdbarch_gdb_signal_from_target', as defined in |
2055 | gdbarch.h. This function is not static because it is exported to | |
2056 | other -tdep files. */ | |
2057 | ||
2058 | enum gdb_signal | |
2059 | linux_gdb_signal_from_target (struct gdbarch *gdbarch, int signal) | |
2060 | { | |
2061 | switch (signal) | |
2062 | { | |
2063 | case 0: | |
2064 | return GDB_SIGNAL_0; | |
2065 | ||
2066 | case LINUX_SIGHUP: | |
2067 | return GDB_SIGNAL_HUP; | |
2068 | ||
2069 | case LINUX_SIGINT: | |
2070 | return GDB_SIGNAL_INT; | |
2071 | ||
2072 | case LINUX_SIGQUIT: | |
2073 | return GDB_SIGNAL_QUIT; | |
2074 | ||
2075 | case LINUX_SIGILL: | |
2076 | return GDB_SIGNAL_ILL; | |
2077 | ||
2078 | case LINUX_SIGTRAP: | |
2079 | return GDB_SIGNAL_TRAP; | |
2080 | ||
2081 | case LINUX_SIGABRT: | |
2082 | return GDB_SIGNAL_ABRT; | |
2083 | ||
2084 | case LINUX_SIGBUS: | |
2085 | return GDB_SIGNAL_BUS; | |
2086 | ||
2087 | case LINUX_SIGFPE: | |
2088 | return GDB_SIGNAL_FPE; | |
2089 | ||
2090 | case LINUX_SIGKILL: | |
2091 | return GDB_SIGNAL_KILL; | |
2092 | ||
2093 | case LINUX_SIGUSR1: | |
2094 | return GDB_SIGNAL_USR1; | |
2095 | ||
2096 | case LINUX_SIGSEGV: | |
2097 | return GDB_SIGNAL_SEGV; | |
2098 | ||
2099 | case LINUX_SIGUSR2: | |
2100 | return GDB_SIGNAL_USR2; | |
2101 | ||
2102 | case LINUX_SIGPIPE: | |
2103 | return GDB_SIGNAL_PIPE; | |
2104 | ||
2105 | case LINUX_SIGALRM: | |
2106 | return GDB_SIGNAL_ALRM; | |
2107 | ||
2108 | case LINUX_SIGTERM: | |
2109 | return GDB_SIGNAL_TERM; | |
2110 | ||
2111 | case LINUX_SIGCHLD: | |
2112 | return GDB_SIGNAL_CHLD; | |
2113 | ||
2114 | case LINUX_SIGCONT: | |
2115 | return GDB_SIGNAL_CONT; | |
2116 | ||
2117 | case LINUX_SIGSTOP: | |
2118 | return GDB_SIGNAL_STOP; | |
2119 | ||
2120 | case LINUX_SIGTSTP: | |
2121 | return GDB_SIGNAL_TSTP; | |
2122 | ||
2123 | case LINUX_SIGTTIN: | |
2124 | return GDB_SIGNAL_TTIN; | |
2125 | ||
2126 | case LINUX_SIGTTOU: | |
2127 | return GDB_SIGNAL_TTOU; | |
2128 | ||
2129 | case LINUX_SIGURG: | |
2130 | return GDB_SIGNAL_URG; | |
2131 | ||
2132 | case LINUX_SIGXCPU: | |
2133 | return GDB_SIGNAL_XCPU; | |
2134 | ||
2135 | case LINUX_SIGXFSZ: | |
2136 | return GDB_SIGNAL_XFSZ; | |
2137 | ||
2138 | case LINUX_SIGVTALRM: | |
2139 | return GDB_SIGNAL_VTALRM; | |
2140 | ||
2141 | case LINUX_SIGPROF: | |
2142 | return GDB_SIGNAL_PROF; | |
2143 | ||
2144 | case LINUX_SIGWINCH: | |
2145 | return GDB_SIGNAL_WINCH; | |
2146 | ||
2147 | /* No way to differentiate between SIGIO and SIGPOLL. | |
2148 | Therefore, we just handle the first one. */ | |
2149 | case LINUX_SIGIO: | |
2150 | return GDB_SIGNAL_IO; | |
2151 | ||
2152 | case LINUX_SIGPWR: | |
2153 | return GDB_SIGNAL_PWR; | |
2154 | ||
2155 | case LINUX_SIGSYS: | |
2156 | return GDB_SIGNAL_SYS; | |
2157 | ||
2158 | /* SIGRTMIN and SIGRTMAX are not continuous in <gdb/signals.def>, | |
2159 | therefore we have to handle them here. */ | |
2160 | case LINUX_SIGRTMIN: | |
2161 | return GDB_SIGNAL_REALTIME_32; | |
2162 | ||
2163 | case LINUX_SIGRTMAX: | |
2164 | return GDB_SIGNAL_REALTIME_64; | |
2165 | } | |
2166 | ||
2167 | if (signal >= LINUX_SIGRTMIN + 1 && signal <= LINUX_SIGRTMAX - 1) | |
2168 | { | |
2169 | int offset = signal - LINUX_SIGRTMIN + 1; | |
2170 | ||
2171 | return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_33 + offset); | |
2172 | } | |
2173 | ||
2174 | return GDB_SIGNAL_UNKNOWN; | |
2175 | } | |
2176 | ||
2177 | /* Implementation of `gdbarch_gdb_signal_to_target', as defined in | |
2178 | gdbarch.h. This function is not static because it is exported to | |
2179 | other -tdep files. */ | |
2180 | ||
2181 | int | |
2182 | linux_gdb_signal_to_target (struct gdbarch *gdbarch, | |
2183 | enum gdb_signal signal) | |
2184 | { | |
2185 | switch (signal) | |
2186 | { | |
2187 | case GDB_SIGNAL_0: | |
2188 | return 0; | |
2189 | ||
2190 | case GDB_SIGNAL_HUP: | |
2191 | return LINUX_SIGHUP; | |
2192 | ||
2193 | case GDB_SIGNAL_INT: | |
2194 | return LINUX_SIGINT; | |
2195 | ||
2196 | case GDB_SIGNAL_QUIT: | |
2197 | return LINUX_SIGQUIT; | |
2198 | ||
2199 | case GDB_SIGNAL_ILL: | |
2200 | return LINUX_SIGILL; | |
2201 | ||
2202 | case GDB_SIGNAL_TRAP: | |
2203 | return LINUX_SIGTRAP; | |
2204 | ||
2205 | case GDB_SIGNAL_ABRT: | |
2206 | return LINUX_SIGABRT; | |
2207 | ||
2208 | case GDB_SIGNAL_FPE: | |
2209 | return LINUX_SIGFPE; | |
2210 | ||
2211 | case GDB_SIGNAL_KILL: | |
2212 | return LINUX_SIGKILL; | |
2213 | ||
2214 | case GDB_SIGNAL_BUS: | |
2215 | return LINUX_SIGBUS; | |
2216 | ||
2217 | case GDB_SIGNAL_SEGV: | |
2218 | return LINUX_SIGSEGV; | |
2219 | ||
2220 | case GDB_SIGNAL_SYS: | |
2221 | return LINUX_SIGSYS; | |
2222 | ||
2223 | case GDB_SIGNAL_PIPE: | |
2224 | return LINUX_SIGPIPE; | |
2225 | ||
2226 | case GDB_SIGNAL_ALRM: | |
2227 | return LINUX_SIGALRM; | |
2228 | ||
2229 | case GDB_SIGNAL_TERM: | |
2230 | return LINUX_SIGTERM; | |
2231 | ||
2232 | case GDB_SIGNAL_URG: | |
2233 | return LINUX_SIGURG; | |
2234 | ||
2235 | case GDB_SIGNAL_STOP: | |
2236 | return LINUX_SIGSTOP; | |
2237 | ||
2238 | case GDB_SIGNAL_TSTP: | |
2239 | return LINUX_SIGTSTP; | |
2240 | ||
2241 | case GDB_SIGNAL_CONT: | |
2242 | return LINUX_SIGCONT; | |
2243 | ||
2244 | case GDB_SIGNAL_CHLD: | |
2245 | return LINUX_SIGCHLD; | |
2246 | ||
2247 | case GDB_SIGNAL_TTIN: | |
2248 | return LINUX_SIGTTIN; | |
2249 | ||
2250 | case GDB_SIGNAL_TTOU: | |
2251 | return LINUX_SIGTTOU; | |
2252 | ||
2253 | case GDB_SIGNAL_IO: | |
2254 | return LINUX_SIGIO; | |
2255 | ||
2256 | case GDB_SIGNAL_XCPU: | |
2257 | return LINUX_SIGXCPU; | |
2258 | ||
2259 | case GDB_SIGNAL_XFSZ: | |
2260 | return LINUX_SIGXFSZ; | |
2261 | ||
2262 | case GDB_SIGNAL_VTALRM: | |
2263 | return LINUX_SIGVTALRM; | |
2264 | ||
2265 | case GDB_SIGNAL_PROF: | |
2266 | return LINUX_SIGPROF; | |
2267 | ||
2268 | case GDB_SIGNAL_WINCH: | |
2269 | return LINUX_SIGWINCH; | |
2270 | ||
2271 | case GDB_SIGNAL_USR1: | |
2272 | return LINUX_SIGUSR1; | |
2273 | ||
2274 | case GDB_SIGNAL_USR2: | |
2275 | return LINUX_SIGUSR2; | |
2276 | ||
2277 | case GDB_SIGNAL_PWR: | |
2278 | return LINUX_SIGPWR; | |
2279 | ||
2280 | case GDB_SIGNAL_POLL: | |
2281 | return LINUX_SIGPOLL; | |
2282 | ||
2283 | /* GDB_SIGNAL_REALTIME_32 is not continuous in <gdb/signals.def>, | |
2284 | therefore we have to handle it here. */ | |
2285 | case GDB_SIGNAL_REALTIME_32: | |
2286 | return LINUX_SIGRTMIN; | |
2287 | ||
2288 | /* Same comment applies to _64. */ | |
2289 | case GDB_SIGNAL_REALTIME_64: | |
2290 | return LINUX_SIGRTMAX; | |
2291 | } | |
2292 | ||
2293 | /* GDB_SIGNAL_REALTIME_33 to _64 are continuous. */ | |
2294 | if (signal >= GDB_SIGNAL_REALTIME_33 | |
2295 | && signal <= GDB_SIGNAL_REALTIME_63) | |
2296 | { | |
2297 | int offset = signal - GDB_SIGNAL_REALTIME_33; | |
2298 | ||
2299 | return LINUX_SIGRTMIN + 1 + offset; | |
2300 | } | |
2301 | ||
2302 | return -1; | |
2303 | } | |
2304 | ||
cdfa0b0a PA |
2305 | /* Helper for linux_vsyscall_range that does the real work of finding |
2306 | the vsyscall's address range. */ | |
3437254d PA |
2307 | |
2308 | static int | |
cdfa0b0a | 2309 | linux_vsyscall_range_raw (struct gdbarch *gdbarch, struct mem_range *range) |
3437254d | 2310 | { |
95e94c3f PA |
2311 | char filename[100]; |
2312 | long pid; | |
95e94c3f | 2313 | |
8b88a78e | 2314 | if (target_auxv_search (current_top_target (), AT_SYSINFO_EHDR, &range->start) <= 0) |
95e94c3f PA |
2315 | return 0; |
2316 | ||
6bb90213 PA |
2317 | /* It doesn't make sense to access the host's /proc when debugging a |
2318 | core file. Instead, look for the PT_LOAD segment that matches | |
2319 | the vDSO. */ | |
2320 | if (!target_has_execution) | |
2321 | { | |
6bb90213 PA |
2322 | long phdrs_size; |
2323 | int num_phdrs, i; | |
2324 | ||
2325 | phdrs_size = bfd_get_elf_phdr_upper_bound (core_bfd); | |
2326 | if (phdrs_size == -1) | |
2327 | return 0; | |
2328 | ||
31aceee8 TV |
2329 | gdb::unique_xmalloc_ptr<Elf_Internal_Phdr> |
2330 | phdrs ((Elf_Internal_Phdr *) xmalloc (phdrs_size)); | |
2331 | num_phdrs = bfd_get_elf_phdrs (core_bfd, phdrs.get ()); | |
6bb90213 PA |
2332 | if (num_phdrs == -1) |
2333 | return 0; | |
2334 | ||
2335 | for (i = 0; i < num_phdrs; i++) | |
31aceee8 TV |
2336 | if (phdrs.get ()[i].p_type == PT_LOAD |
2337 | && phdrs.get ()[i].p_vaddr == range->start) | |
6bb90213 | 2338 | { |
31aceee8 | 2339 | range->length = phdrs.get ()[i].p_memsz; |
6bb90213 PA |
2340 | return 1; |
2341 | } | |
2342 | ||
2343 | return 0; | |
2344 | } | |
2345 | ||
95e94c3f PA |
2346 | /* We need to know the real target PID to access /proc. */ |
2347 | if (current_inferior ()->fake_pid_p) | |
2348 | return 0; | |
2349 | ||
95e94c3f | 2350 | pid = current_inferior ()->pid; |
3437254d | 2351 | |
95e94c3f PA |
2352 | /* Note that reading /proc/PID/task/PID/maps (1) is much faster than |
2353 | reading /proc/PID/maps (2). The later identifies thread stacks | |
2354 | in the output, which requires scanning every thread in the thread | |
2355 | group to check whether a VMA is actually a thread's stack. With | |
2356 | Linux 4.4 on an Intel i7-4810MQ @ 2.80GHz, with an inferior with | |
2357 | a few thousand threads, (1) takes a few miliseconds, while (2) | |
2358 | takes several seconds. Also note that "smaps", what we read for | |
2359 | determining core dump mappings, is even slower than "maps". */ | |
2360 | xsnprintf (filename, sizeof filename, "/proc/%ld/task/%ld/maps", pid, pid); | |
87028b87 TT |
2361 | gdb::unique_xmalloc_ptr<char> data |
2362 | = target_fileio_read_stralloc (NULL, filename); | |
95e94c3f PA |
2363 | if (data != NULL) |
2364 | { | |
95e94c3f PA |
2365 | char *line; |
2366 | char *saveptr = NULL; | |
2367 | ||
87028b87 | 2368 | for (line = strtok_r (data.get (), "\n", &saveptr); |
95e94c3f PA |
2369 | line != NULL; |
2370 | line = strtok_r (NULL, "\n", &saveptr)) | |
2371 | { | |
2372 | ULONGEST addr, endaddr; | |
2373 | const char *p = line; | |
2374 | ||
2375 | addr = strtoulst (p, &p, 16); | |
2376 | if (addr == range->start) | |
2377 | { | |
2378 | if (*p == '-') | |
2379 | p++; | |
2380 | endaddr = strtoulst (p, &p, 16); | |
2381 | range->length = endaddr - addr; | |
95e94c3f PA |
2382 | return 1; |
2383 | } | |
2384 | } | |
95e94c3f PA |
2385 | } |
2386 | else | |
2387 | warning (_("unable to open /proc file '%s'"), filename); | |
2388 | ||
2389 | return 0; | |
3437254d PA |
2390 | } |
2391 | ||
cdfa0b0a PA |
2392 | /* Implementation of the "vsyscall_range" gdbarch hook. Handles |
2393 | caching, and defers the real work to linux_vsyscall_range_raw. */ | |
2394 | ||
2395 | static int | |
2396 | linux_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range) | |
2397 | { | |
2398 | struct linux_info *info = get_linux_inferior_data (); | |
2399 | ||
2400 | if (info->vsyscall_range_p == 0) | |
2401 | { | |
2402 | if (linux_vsyscall_range_raw (gdbarch, &info->vsyscall_range)) | |
2403 | info->vsyscall_range_p = 1; | |
2404 | else | |
2405 | info->vsyscall_range_p = -1; | |
2406 | } | |
2407 | ||
2408 | if (info->vsyscall_range_p < 0) | |
2409 | return 0; | |
2410 | ||
2411 | *range = info->vsyscall_range; | |
2412 | return 1; | |
2413 | } | |
2414 | ||
3bc3cebe JK |
2415 | /* Symbols for linux_infcall_mmap's ARG_FLAGS; their Linux MAP_* system |
2416 | definitions would be dependent on compilation host. */ | |
2417 | #define GDB_MMAP_MAP_PRIVATE 0x02 /* Changes are private. */ | |
2418 | #define GDB_MMAP_MAP_ANONYMOUS 0x20 /* Don't use a file. */ | |
2419 | ||
2420 | /* See gdbarch.sh 'infcall_mmap'. */ | |
2421 | ||
2422 | static CORE_ADDR | |
2423 | linux_infcall_mmap (CORE_ADDR size, unsigned prot) | |
2424 | { | |
2425 | struct objfile *objf; | |
2426 | /* Do there still exist any Linux systems without "mmap64"? | |
2427 | "mmap" uses 64-bit off_t on x86_64 and 32-bit off_t on i386 and x32. */ | |
2428 | struct value *mmap_val = find_function_in_inferior ("mmap64", &objf); | |
2429 | struct value *addr_val; | |
08feed99 | 2430 | struct gdbarch *gdbarch = objf->arch (); |
3bc3cebe JK |
2431 | CORE_ADDR retval; |
2432 | enum | |
2433 | { | |
2a546367 | 2434 | ARG_ADDR, ARG_LENGTH, ARG_PROT, ARG_FLAGS, ARG_FD, ARG_OFFSET, ARG_LAST |
3bc3cebe | 2435 | }; |
2a546367 | 2436 | struct value *arg[ARG_LAST]; |
3bc3cebe JK |
2437 | |
2438 | arg[ARG_ADDR] = value_from_pointer (builtin_type (gdbarch)->builtin_data_ptr, | |
2439 | 0); | |
2440 | /* Assuming sizeof (unsigned long) == sizeof (size_t). */ | |
2441 | arg[ARG_LENGTH] = value_from_ulongest | |
2442 | (builtin_type (gdbarch)->builtin_unsigned_long, size); | |
2443 | gdb_assert ((prot & ~(GDB_MMAP_PROT_READ | GDB_MMAP_PROT_WRITE | |
2444 | | GDB_MMAP_PROT_EXEC)) | |
2445 | == 0); | |
2446 | arg[ARG_PROT] = value_from_longest (builtin_type (gdbarch)->builtin_int, prot); | |
2447 | arg[ARG_FLAGS] = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
2448 | GDB_MMAP_MAP_PRIVATE | |
2449 | | GDB_MMAP_MAP_ANONYMOUS); | |
2450 | arg[ARG_FD] = value_from_longest (builtin_type (gdbarch)->builtin_int, -1); | |
2451 | arg[ARG_OFFSET] = value_from_longest (builtin_type (gdbarch)->builtin_int64, | |
2452 | 0); | |
e71585ff | 2453 | addr_val = call_function_by_hand (mmap_val, NULL, arg); |
3bc3cebe JK |
2454 | retval = value_as_address (addr_val); |
2455 | if (retval == (CORE_ADDR) -1) | |
2456 | error (_("Failed inferior mmap call for %s bytes, errno is changed."), | |
2457 | pulongest (size)); | |
2458 | return retval; | |
2459 | } | |
2460 | ||
7f361056 JK |
2461 | /* See gdbarch.sh 'infcall_munmap'. */ |
2462 | ||
2463 | static void | |
2464 | linux_infcall_munmap (CORE_ADDR addr, CORE_ADDR size) | |
2465 | { | |
2466 | struct objfile *objf; | |
2467 | struct value *munmap_val = find_function_in_inferior ("munmap", &objf); | |
2468 | struct value *retval_val; | |
08feed99 | 2469 | struct gdbarch *gdbarch = objf->arch (); |
7f361056 JK |
2470 | LONGEST retval; |
2471 | enum | |
2472 | { | |
2473 | ARG_ADDR, ARG_LENGTH, ARG_LAST | |
2474 | }; | |
2475 | struct value *arg[ARG_LAST]; | |
2476 | ||
2477 | arg[ARG_ADDR] = value_from_pointer (builtin_type (gdbarch)->builtin_data_ptr, | |
2478 | addr); | |
2479 | /* Assuming sizeof (unsigned long) == sizeof (size_t). */ | |
2480 | arg[ARG_LENGTH] = value_from_ulongest | |
2481 | (builtin_type (gdbarch)->builtin_unsigned_long, size); | |
e71585ff | 2482 | retval_val = call_function_by_hand (munmap_val, NULL, arg); |
7f361056 JK |
2483 | retval = value_as_long (retval_val); |
2484 | if (retval != 0) | |
2485 | warning (_("Failed inferior munmap call at %s for %s bytes, " | |
2486 | "errno is changed."), | |
2487 | hex_string (addr), pulongest (size)); | |
2488 | } | |
2489 | ||
906d60cf PA |
2490 | /* See linux-tdep.h. */ |
2491 | ||
2492 | CORE_ADDR | |
2493 | linux_displaced_step_location (struct gdbarch *gdbarch) | |
2494 | { | |
2495 | CORE_ADDR addr; | |
2496 | int bp_len; | |
2497 | ||
2498 | /* Determine entry point from target auxiliary vector. This avoids | |
2499 | the need for symbols. Also, when debugging a stand-alone SPU | |
2500 | executable, entry_point_address () will point to an SPU | |
2501 | local-store address and is thus not usable as displaced stepping | |
2502 | location. The auxiliary vector gets us the PowerPC-side entry | |
2503 | point address instead. */ | |
8b88a78e | 2504 | if (target_auxv_search (current_top_target (), AT_ENTRY, &addr) <= 0) |
16b41842 PA |
2505 | throw_error (NOT_SUPPORTED_ERROR, |
2506 | _("Cannot find AT_ENTRY auxiliary vector entry.")); | |
906d60cf PA |
2507 | |
2508 | /* Make certain that the address points at real code, and not a | |
2509 | function descriptor. */ | |
2510 | addr = gdbarch_convert_from_func_ptr_addr (gdbarch, addr, | |
8b88a78e | 2511 | current_top_target ()); |
906d60cf PA |
2512 | |
2513 | /* Inferior calls also use the entry point as a breakpoint location. | |
2514 | We don't want displaced stepping to interfere with those | |
2515 | breakpoints, so leave space. */ | |
2516 | gdbarch_breakpoint_from_pc (gdbarch, &addr, &bp_len); | |
2517 | addr += bp_len * 2; | |
2518 | ||
2519 | return addr; | |
2520 | } | |
2521 | ||
0f83012e AH |
2522 | /* See linux-tdep.h. */ |
2523 | ||
2524 | CORE_ADDR | |
2525 | linux_get_hwcap (struct target_ops *target) | |
2526 | { | |
2527 | CORE_ADDR field; | |
2528 | if (target_auxv_search (target, AT_HWCAP, &field) != 1) | |
2529 | return 0; | |
2530 | return field; | |
2531 | } | |
2532 | ||
2533 | /* See linux-tdep.h. */ | |
2534 | ||
2535 | CORE_ADDR | |
2536 | linux_get_hwcap2 (struct target_ops *target) | |
2537 | { | |
2538 | CORE_ADDR field; | |
2539 | if (target_auxv_search (target, AT_HWCAP2, &field) != 1) | |
2540 | return 0; | |
2541 | return field; | |
2542 | } | |
2543 | ||
df8411da SDJ |
2544 | /* Display whether the gcore command is using the |
2545 | /proc/PID/coredump_filter file. */ | |
2546 | ||
2547 | static void | |
2548 | show_use_coredump_filter (struct ui_file *file, int from_tty, | |
2549 | struct cmd_list_element *c, const char *value) | |
2550 | { | |
2551 | fprintf_filtered (file, _("Use of /proc/PID/coredump_filter file to generate" | |
2552 | " corefiles is %s.\n"), value); | |
2553 | } | |
2554 | ||
afa840dc SL |
2555 | /* Display whether the gcore command is dumping mappings marked with |
2556 | the VM_DONTDUMP flag. */ | |
2557 | ||
2558 | static void | |
2559 | show_dump_excluded_mappings (struct ui_file *file, int from_tty, | |
2560 | struct cmd_list_element *c, const char *value) | |
2561 | { | |
2562 | fprintf_filtered (file, _("Dumping of mappings marked with the VM_DONTDUMP" | |
2563 | " flag is %s.\n"), value); | |
2564 | } | |
2565 | ||
a5ee0f0c PA |
2566 | /* To be called from the various GDB_OSABI_LINUX handlers for the |
2567 | various GNU/Linux architectures and machine types. */ | |
2568 | ||
2569 | void | |
2570 | linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
2571 | { | |
2572 | set_gdbarch_core_pid_to_str (gdbarch, linux_core_pid_to_str); | |
3030c96e | 2573 | set_gdbarch_info_proc (gdbarch, linux_info_proc); |
451b7c33 | 2574 | set_gdbarch_core_info_proc (gdbarch, linux_core_info_proc); |
382b69bb | 2575 | set_gdbarch_core_xfer_siginfo (gdbarch, linux_core_xfer_siginfo); |
db082f59 | 2576 | set_gdbarch_read_core_file_mappings (gdbarch, linux_read_core_file_mappings); |
35c2fab7 | 2577 | set_gdbarch_find_memory_regions (gdbarch, linux_find_memory_regions); |
f968fe80 | 2578 | set_gdbarch_make_corefile_notes (gdbarch, linux_make_corefile_notes); |
33fbcbee PA |
2579 | set_gdbarch_has_shared_address_space (gdbarch, |
2580 | linux_has_shared_address_space); | |
eb14d406 SDJ |
2581 | set_gdbarch_gdb_signal_from_target (gdbarch, |
2582 | linux_gdb_signal_from_target); | |
2583 | set_gdbarch_gdb_signal_to_target (gdbarch, | |
2584 | linux_gdb_signal_to_target); | |
3437254d | 2585 | set_gdbarch_vsyscall_range (gdbarch, linux_vsyscall_range); |
3bc3cebe | 2586 | set_gdbarch_infcall_mmap (gdbarch, linux_infcall_mmap); |
7f361056 | 2587 | set_gdbarch_infcall_munmap (gdbarch, linux_infcall_munmap); |
5cd867b4 | 2588 | set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type); |
a5ee0f0c | 2589 | } |
06253dd3 | 2590 | |
6c265988 | 2591 | void _initialize_linux_tdep (); |
06253dd3 | 2592 | void |
6c265988 | 2593 | _initialize_linux_tdep () |
06253dd3 JK |
2594 | { |
2595 | linux_gdbarch_data_handle = | |
2596 | gdbarch_data_register_post_init (init_linux_gdbarch_data); | |
cdfa0b0a | 2597 | |
cdfa0b0a | 2598 | /* Observers used to invalidate the cache when needed. */ |
76727919 TT |
2599 | gdb::observers::inferior_exit.attach (invalidate_linux_cache_inf); |
2600 | gdb::observers::inferior_appeared.attach (invalidate_linux_cache_inf); | |
df8411da SDJ |
2601 | |
2602 | add_setshow_boolean_cmd ("use-coredump-filter", class_files, | |
2603 | &use_coredump_filter, _("\ | |
2604 | Set whether gcore should consider /proc/PID/coredump_filter."), | |
2605 | _("\ | |
2606 | Show whether gcore should consider /proc/PID/coredump_filter."), | |
2607 | _("\ | |
2608 | Use this command to set whether gcore should consider the contents\n\ | |
2609 | of /proc/PID/coredump_filter when generating the corefile. For more information\n\ | |
2610 | about this file, refer to the manpage of core(5)."), | |
2611 | NULL, show_use_coredump_filter, | |
2612 | &setlist, &showlist); | |
afa840dc SL |
2613 | |
2614 | add_setshow_boolean_cmd ("dump-excluded-mappings", class_files, | |
2615 | &dump_excluded_mappings, _("\ | |
2616 | Set whether gcore should dump mappings marked with the VM_DONTDUMP flag."), | |
2617 | _("\ | |
2618 | Show whether gcore should dump mappings marked with the VM_DONTDUMP flag."), | |
2619 | _("\ | |
2620 | Use this command to set whether gcore should dump mappings marked with the\n\ | |
2621 | VM_DONTDUMP flag (\"dd\" in /proc/PID/smaps) when generating the corefile. For\n\ | |
2622 | more information about this file, refer to the manpage of proc(5) and core(5)."), | |
2623 | NULL, show_dump_excluded_mappings, | |
2624 | &setlist, &showlist); | |
06253dd3 | 2625 | } |