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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 | |
480af54c SM |
169 | { |
170 | struct type *siginfo_type; | |
171 | int num_disp_step_buffers; | |
172 | }; | |
06253dd3 JK |
173 | |
174 | static void * | |
d9655058 | 175 | init_linux_gdbarch_data (struct obstack *obstack) |
06253dd3 | 176 | { |
d9655058 | 177 | return obstack_zalloc<linux_gdbarch_data> (obstack); |
06253dd3 JK |
178 | } |
179 | ||
180 | static struct linux_gdbarch_data * | |
181 | get_linux_gdbarch_data (struct gdbarch *gdbarch) | |
182 | { | |
9a3c8263 SM |
183 | return ((struct linux_gdbarch_data *) |
184 | gdbarch_data (gdbarch, linux_gdbarch_data_handle)); | |
06253dd3 JK |
185 | } |
186 | ||
cdfa0b0a PA |
187 | /* Linux-specific cached data. This is used by GDB for caching |
188 | purposes for each inferior. This helps reduce the overhead of | |
189 | transfering data from a remote target to the local host. */ | |
190 | struct linux_info | |
191 | { | |
192 | /* Cache of the inferior's vsyscall/vDSO mapping range. Only valid | |
193 | if VSYSCALL_RANGE_P is positive. This is cached because getting | |
194 | at this info requires an auxv lookup (which is itself cached), | |
195 | and looking through the inferior's mappings (which change | |
196 | throughout execution and therefore cannot be cached). */ | |
89fb8848 | 197 | struct mem_range vsyscall_range {}; |
cdfa0b0a PA |
198 | |
199 | /* Zero if we haven't tried looking up the vsyscall's range before | |
200 | yet. Positive if we tried looking it up, and found it. Negative | |
201 | if we tried looking it up but failed. */ | |
89fb8848 | 202 | int vsyscall_range_p = 0; |
187b041e | 203 | |
480af54c SM |
204 | /* Inferior's displaced step buffers. */ |
205 | gdb::optional<displaced_step_buffers> disp_step_bufs; | |
cdfa0b0a PA |
206 | }; |
207 | ||
89fb8848 TT |
208 | /* Per-inferior data key. */ |
209 | static const struct inferior_key<linux_info> linux_inferior_data; | |
210 | ||
cdfa0b0a PA |
211 | /* Frees whatever allocated space there is to be freed and sets INF's |
212 | linux cache data pointer to NULL. */ | |
213 | ||
214 | static void | |
215 | invalidate_linux_cache_inf (struct inferior *inf) | |
216 | { | |
89fb8848 | 217 | linux_inferior_data.clear (inf); |
cdfa0b0a PA |
218 | } |
219 | ||
220 | /* Fetch the linux cache info for INF. This function always returns a | |
221 | valid INFO pointer. */ | |
222 | ||
223 | static struct linux_info * | |
94b24c74 | 224 | get_linux_inferior_data (inferior *inf) |
cdfa0b0a | 225 | { |
94b24c74 | 226 | linux_info *info = linux_inferior_data.get (inf); |
cdfa0b0a | 227 | |
94b24c74 | 228 | if (info == nullptr) |
89fb8848 | 229 | info = linux_inferior_data.emplace (inf); |
cdfa0b0a PA |
230 | |
231 | return info; | |
232 | } | |
233 | ||
190b495d | 234 | /* See linux-tdep.h. */ |
4aa995e1 | 235 | |
190b495d | 236 | struct type * |
43564574 WT |
237 | linux_get_siginfo_type_with_fields (struct gdbarch *gdbarch, |
238 | linux_siginfo_extra_fields extra_fields) | |
4aa995e1 | 239 | { |
06253dd3 | 240 | struct linux_gdbarch_data *linux_gdbarch_data; |
96b5c49f | 241 | struct type *int_type, *uint_type, *long_type, *void_ptr_type, *short_type; |
4aa995e1 PA |
242 | struct type *uid_type, *pid_type; |
243 | struct type *sigval_type, *clock_type; | |
244 | struct type *siginfo_type, *sifields_type; | |
245 | struct type *type; | |
246 | ||
06253dd3 JK |
247 | linux_gdbarch_data = get_linux_gdbarch_data (gdbarch); |
248 | if (linux_gdbarch_data->siginfo_type != NULL) | |
249 | return linux_gdbarch_data->siginfo_type; | |
250 | ||
e9bb382b UW |
251 | int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), |
252 | 0, "int"); | |
253 | uint_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
254 | 1, "unsigned int"); | |
255 | long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), | |
256 | 0, "long"); | |
96b5c49f WT |
257 | short_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), |
258 | 0, "short"); | |
4aa995e1 PA |
259 | void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void); |
260 | ||
261 | /* sival_t */ | |
e9bb382b | 262 | sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); |
d0e39ea2 | 263 | sigval_type->set_name (xstrdup ("sigval_t")); |
4aa995e1 PA |
264 | append_composite_type_field (sigval_type, "sival_int", int_type); |
265 | append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type); | |
266 | ||
267 | /* __pid_t */ | |
e3aa49af | 268 | pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
77b7c781 | 269 | TYPE_LENGTH (int_type) * TARGET_CHAR_BIT, "__pid_t"); |
4aa995e1 | 270 | TYPE_TARGET_TYPE (pid_type) = int_type; |
8f53807e | 271 | pid_type->set_target_is_stub (true); |
4aa995e1 PA |
272 | |
273 | /* __uid_t */ | |
e3aa49af | 274 | uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
77b7c781 | 275 | TYPE_LENGTH (uint_type) * TARGET_CHAR_BIT, "__uid_t"); |
4aa995e1 | 276 | TYPE_TARGET_TYPE (uid_type) = uint_type; |
8f53807e | 277 | uid_type->set_target_is_stub (true); |
4aa995e1 PA |
278 | |
279 | /* __clock_t */ | |
e3aa49af | 280 | clock_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, |
77b7c781 UW |
281 | TYPE_LENGTH (long_type) * TARGET_CHAR_BIT, |
282 | "__clock_t"); | |
4aa995e1 | 283 | TYPE_TARGET_TYPE (clock_type) = long_type; |
8f53807e | 284 | clock_type->set_target_is_stub (true); |
4aa995e1 PA |
285 | |
286 | /* _sifields */ | |
e9bb382b | 287 | sifields_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); |
4aa995e1 PA |
288 | |
289 | { | |
290 | const int si_max_size = 128; | |
291 | int si_pad_size; | |
292 | int size_of_int = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT; | |
293 | ||
294 | /* _pad */ | |
295 | if (gdbarch_ptr_bit (gdbarch) == 64) | |
296 | si_pad_size = (si_max_size / size_of_int) - 4; | |
297 | else | |
298 | si_pad_size = (si_max_size / size_of_int) - 3; | |
299 | append_composite_type_field (sifields_type, "_pad", | |
300 | init_vector_type (int_type, si_pad_size)); | |
301 | } | |
302 | ||
303 | /* _kill */ | |
e9bb382b | 304 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
305 | append_composite_type_field (type, "si_pid", pid_type); |
306 | append_composite_type_field (type, "si_uid", uid_type); | |
307 | append_composite_type_field (sifields_type, "_kill", type); | |
308 | ||
309 | /* _timer */ | |
e9bb382b | 310 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
311 | append_composite_type_field (type, "si_tid", int_type); |
312 | append_composite_type_field (type, "si_overrun", int_type); | |
313 | append_composite_type_field (type, "si_sigval", sigval_type); | |
314 | append_composite_type_field (sifields_type, "_timer", type); | |
315 | ||
316 | /* _rt */ | |
e9bb382b | 317 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
318 | append_composite_type_field (type, "si_pid", pid_type); |
319 | append_composite_type_field (type, "si_uid", uid_type); | |
320 | append_composite_type_field (type, "si_sigval", sigval_type); | |
321 | append_composite_type_field (sifields_type, "_rt", type); | |
322 | ||
323 | /* _sigchld */ | |
e9bb382b | 324 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
325 | append_composite_type_field (type, "si_pid", pid_type); |
326 | append_composite_type_field (type, "si_uid", uid_type); | |
327 | append_composite_type_field (type, "si_status", int_type); | |
328 | append_composite_type_field (type, "si_utime", clock_type); | |
329 | append_composite_type_field (type, "si_stime", clock_type); | |
330 | append_composite_type_field (sifields_type, "_sigchld", type); | |
331 | ||
332 | /* _sigfault */ | |
e9bb382b | 333 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 | 334 | append_composite_type_field (type, "si_addr", void_ptr_type); |
96b5c49f WT |
335 | |
336 | /* Additional bound fields for _sigfault in case they were requested. */ | |
337 | if ((extra_fields & LINUX_SIGINFO_FIELD_ADDR_BND) != 0) | |
338 | { | |
339 | struct type *sigfault_bnd_fields; | |
340 | ||
341 | append_composite_type_field (type, "_addr_lsb", short_type); | |
342 | sigfault_bnd_fields = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); | |
343 | append_composite_type_field (sigfault_bnd_fields, "_lower", void_ptr_type); | |
344 | append_composite_type_field (sigfault_bnd_fields, "_upper", void_ptr_type); | |
345 | append_composite_type_field (type, "_addr_bnd", sigfault_bnd_fields); | |
346 | } | |
4aa995e1 PA |
347 | append_composite_type_field (sifields_type, "_sigfault", type); |
348 | ||
349 | /* _sigpoll */ | |
e9bb382b | 350 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
351 | append_composite_type_field (type, "si_band", long_type); |
352 | append_composite_type_field (type, "si_fd", int_type); | |
353 | append_composite_type_field (sifields_type, "_sigpoll", type); | |
354 | ||
355 | /* struct siginfo */ | |
e9bb382b | 356 | siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
d0e39ea2 | 357 | siginfo_type->set_name (xstrdup ("siginfo")); |
4aa995e1 PA |
358 | append_composite_type_field (siginfo_type, "si_signo", int_type); |
359 | append_composite_type_field (siginfo_type, "si_errno", int_type); | |
360 | append_composite_type_field (siginfo_type, "si_code", int_type); | |
361 | append_composite_type_field_aligned (siginfo_type, | |
362 | "_sifields", sifields_type, | |
363 | TYPE_LENGTH (long_type)); | |
364 | ||
06253dd3 JK |
365 | linux_gdbarch_data->siginfo_type = siginfo_type; |
366 | ||
4aa995e1 PA |
367 | return siginfo_type; |
368 | } | |
6b3ae818 | 369 | |
43564574 WT |
370 | /* This function is suitable for architectures that don't |
371 | extend/override the standard siginfo structure. */ | |
372 | ||
373 | static struct type * | |
374 | linux_get_siginfo_type (struct gdbarch *gdbarch) | |
375 | { | |
376 | return linux_get_siginfo_type_with_fields (gdbarch, 0); | |
377 | } | |
378 | ||
c01cbb3d YQ |
379 | /* Return true if the target is running on uClinux instead of normal |
380 | Linux kernel. */ | |
381 | ||
382 | int | |
383 | linux_is_uclinux (void) | |
6c95b8df | 384 | { |
6c95b8df | 385 | CORE_ADDR dummy; |
6c95b8df | 386 | |
8b88a78e PA |
387 | return (target_auxv_search (current_top_target (), AT_NULL, &dummy) > 0 |
388 | && target_auxv_search (current_top_target (), AT_PAGESZ, &dummy) == 0); | |
c01cbb3d | 389 | } |
6c95b8df | 390 | |
c01cbb3d YQ |
391 | static int |
392 | linux_has_shared_address_space (struct gdbarch *gdbarch) | |
393 | { | |
394 | return linux_is_uclinux (); | |
6c95b8df | 395 | } |
a5ee0f0c PA |
396 | |
397 | /* This is how we want PTIDs from core files to be printed. */ | |
398 | ||
a068643d | 399 | static std::string |
a5ee0f0c PA |
400 | linux_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid) |
401 | { | |
e38504b3 | 402 | if (ptid.lwp () != 0) |
a068643d | 403 | return string_printf ("LWP %ld", ptid.lwp ()); |
a5ee0f0c PA |
404 | |
405 | return normal_pid_to_str (ptid); | |
406 | } | |
407 | ||
db1ff28b JK |
408 | /* Service function for corefiles and info proc. */ |
409 | ||
410 | static void | |
411 | read_mapping (const char *line, | |
412 | ULONGEST *addr, ULONGEST *endaddr, | |
413 | const char **permissions, size_t *permissions_len, | |
414 | ULONGEST *offset, | |
dda83cd7 | 415 | const char **device, size_t *device_len, |
db1ff28b JK |
416 | ULONGEST *inode, |
417 | const char **filename) | |
418 | { | |
419 | const char *p = line; | |
420 | ||
421 | *addr = strtoulst (p, &p, 16); | |
422 | if (*p == '-') | |
423 | p++; | |
424 | *endaddr = strtoulst (p, &p, 16); | |
425 | ||
f1735a53 | 426 | p = skip_spaces (p); |
db1ff28b JK |
427 | *permissions = p; |
428 | while (*p && !isspace (*p)) | |
429 | p++; | |
430 | *permissions_len = p - *permissions; | |
431 | ||
432 | *offset = strtoulst (p, &p, 16); | |
433 | ||
f1735a53 | 434 | p = skip_spaces (p); |
db1ff28b JK |
435 | *device = p; |
436 | while (*p && !isspace (*p)) | |
437 | p++; | |
438 | *device_len = p - *device; | |
439 | ||
440 | *inode = strtoulst (p, &p, 10); | |
441 | ||
f1735a53 | 442 | p = skip_spaces (p); |
db1ff28b JK |
443 | *filename = p; |
444 | } | |
445 | ||
446 | /* Helper function to decode the "VmFlags" field in /proc/PID/smaps. | |
447 | ||
448 | This function was based on the documentation found on | |
449 | <Documentation/filesystems/proc.txt>, on the Linux kernel. | |
450 | ||
451 | Linux kernels before commit | |
452 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10) do not have this | |
453 | field on smaps. */ | |
454 | ||
455 | static void | |
456 | decode_vmflags (char *p, struct smaps_vmflags *v) | |
457 | { | |
458 | char *saveptr = NULL; | |
459 | const char *s; | |
460 | ||
461 | v->initialized_p = 1; | |
462 | p = skip_to_space (p); | |
463 | p = skip_spaces (p); | |
464 | ||
465 | for (s = strtok_r (p, " ", &saveptr); | |
466 | s != NULL; | |
467 | s = strtok_r (NULL, " ", &saveptr)) | |
468 | { | |
469 | if (strcmp (s, "io") == 0) | |
470 | v->io_page = 1; | |
471 | else if (strcmp (s, "ht") == 0) | |
472 | v->uses_huge_tlb = 1; | |
473 | else if (strcmp (s, "dd") == 0) | |
474 | v->exclude_coredump = 1; | |
475 | else if (strcmp (s, "sh") == 0) | |
476 | v->shared_mapping = 1; | |
477 | } | |
478 | } | |
479 | ||
2d7cc5c7 PA |
480 | /* Regexes used by mapping_is_anonymous_p. Put in a structure because |
481 | they're initialized lazily. */ | |
482 | ||
483 | struct mapping_regexes | |
484 | { | |
485 | /* Matches "/dev/zero" filenames (with or without the "(deleted)" | |
486 | string in the end). We know for sure, based on the Linux kernel | |
487 | code, that memory mappings whose associated filename is | |
488 | "/dev/zero" are guaranteed to be MAP_ANONYMOUS. */ | |
489 | compiled_regex dev_zero | |
490 | {"^/dev/zero\\( (deleted)\\)\\?$", REG_NOSUB, | |
491 | _("Could not compile regex to match /dev/zero filename")}; | |
492 | ||
493 | /* Matches "/SYSV%08x" filenames (with or without the "(deleted)" | |
494 | string in the end). These filenames refer to shared memory | |
495 | (shmem), and memory mappings associated with them are | |
496 | MAP_ANONYMOUS as well. */ | |
497 | compiled_regex shmem_file | |
498 | {"^/\\?SYSV[0-9a-fA-F]\\{8\\}\\( (deleted)\\)\\?$", REG_NOSUB, | |
499 | _("Could not compile regex to match shmem filenames")}; | |
500 | ||
501 | /* A heuristic we use to try to mimic the Linux kernel's 'n_link == | |
502 | 0' code, which is responsible to decide if it is dealing with a | |
503 | 'MAP_SHARED | MAP_ANONYMOUS' mapping. In other words, if | |
504 | FILE_DELETED matches, it does not necessarily mean that we are | |
505 | dealing with an anonymous shared mapping. However, there is no | |
506 | easy way to detect this currently, so this is the best | |
507 | approximation we have. | |
508 | ||
509 | As a result, GDB will dump readonly pages of deleted executables | |
510 | when using the default value of coredump_filter (0x33), while the | |
511 | Linux kernel will not dump those pages. But we can live with | |
512 | that. */ | |
513 | compiled_regex file_deleted | |
514 | {" (deleted)$", REG_NOSUB, | |
515 | _("Could not compile regex to match '<file> (deleted)'")}; | |
516 | }; | |
517 | ||
db1ff28b JK |
518 | /* Return 1 if the memory mapping is anonymous, 0 otherwise. |
519 | ||
520 | FILENAME is the name of the file present in the first line of the | |
521 | memory mapping, in the "/proc/PID/smaps" output. For example, if | |
522 | the first line is: | |
523 | ||
524 | 7fd0ca877000-7fd0d0da0000 r--p 00000000 fd:02 2100770 /path/to/file | |
525 | ||
526 | Then FILENAME will be "/path/to/file". */ | |
527 | ||
528 | static int | |
529 | mapping_is_anonymous_p (const char *filename) | |
530 | { | |
2d7cc5c7 | 531 | static gdb::optional<mapping_regexes> regexes; |
db1ff28b JK |
532 | static int init_regex_p = 0; |
533 | ||
534 | if (!init_regex_p) | |
535 | { | |
db1ff28b JK |
536 | /* Let's be pessimistic and assume there will be an error while |
537 | compiling the regex'es. */ | |
538 | init_regex_p = -1; | |
539 | ||
2d7cc5c7 | 540 | regexes.emplace (); |
db1ff28b JK |
541 | |
542 | /* If we reached this point, then everything succeeded. */ | |
543 | init_regex_p = 1; | |
544 | } | |
545 | ||
546 | if (init_regex_p == -1) | |
547 | { | |
548 | const char deleted[] = " (deleted)"; | |
549 | size_t del_len = sizeof (deleted) - 1; | |
550 | size_t filename_len = strlen (filename); | |
551 | ||
552 | /* There was an error while compiling the regex'es above. In | |
553 | order to try to give some reliable information to the caller, | |
554 | we just try to find the string " (deleted)" in the filename. | |
555 | If we managed to find it, then we assume the mapping is | |
556 | anonymous. */ | |
557 | return (filename_len >= del_len | |
558 | && strcmp (filename + filename_len - del_len, deleted) == 0); | |
559 | } | |
560 | ||
561 | if (*filename == '\0' | |
2d7cc5c7 PA |
562 | || regexes->dev_zero.exec (filename, 0, NULL, 0) == 0 |
563 | || regexes->shmem_file.exec (filename, 0, NULL, 0) == 0 | |
564 | || regexes->file_deleted.exec (filename, 0, NULL, 0) == 0) | |
db1ff28b JK |
565 | return 1; |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
570 | /* Return 0 if the memory mapping (which is related to FILTERFLAGS, V, | |
57e5e645 SDJ |
571 | MAYBE_PRIVATE_P, MAPPING_ANONYMOUS_P, ADDR and OFFSET) should not |
572 | be dumped, or greater than 0 if it should. | |
db1ff28b JK |
573 | |
574 | In a nutshell, this is the logic that we follow in order to decide | |
575 | if a mapping should be dumped or not. | |
576 | ||
577 | - If the mapping is associated to a file whose name ends with | |
578 | " (deleted)", or if the file is "/dev/zero", or if it is | |
579 | "/SYSV%08x" (shared memory), or if there is no file associated | |
580 | with it, or if the AnonHugePages: or the Anonymous: fields in the | |
581 | /proc/PID/smaps have contents, then GDB considers this mapping to | |
582 | be anonymous. Otherwise, GDB considers this mapping to be a | |
583 | file-backed mapping (because there will be a file associated with | |
584 | it). | |
585 | ||
586 | It is worth mentioning that, from all those checks described | |
587 | above, the most fragile is the one to see if the file name ends | |
588 | with " (deleted)". This does not necessarily mean that the | |
589 | mapping is anonymous, because the deleted file associated with | |
590 | the mapping may have been a hard link to another file, for | |
591 | example. The Linux kernel checks to see if "i_nlink == 0", but | |
592 | GDB cannot easily (and normally) do this check (iff running as | |
593 | root, it could find the mapping in /proc/PID/map_files/ and | |
594 | determine whether there still are other hard links to the | |
595 | inode/file). Therefore, we made a compromise here, and we assume | |
596 | that if the file name ends with " (deleted)", then the mapping is | |
597 | indeed anonymous. FWIW, this is something the Linux kernel could | |
598 | do better: expose this information in a more direct way. | |
599 | ||
600 | - If we see the flag "sh" in the "VmFlags:" field (in | |
601 | /proc/PID/smaps), then certainly the memory mapping is shared | |
602 | (VM_SHARED). If we have access to the VmFlags, and we don't see | |
603 | the "sh" there, then certainly the mapping is private. However, | |
604 | Linux kernels before commit | |
605 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10) do not have the | |
606 | "VmFlags:" field; in that case, we use another heuristic: if we | |
607 | see 'p' in the permission flags, then we assume that the mapping | |
608 | is private, even though the presence of the 's' flag there would | |
609 | mean VM_MAYSHARE, which means the mapping could still be private. | |
57e5e645 SDJ |
610 | This should work OK enough, however. |
611 | ||
612 | - Even if, at the end, we decided that we should not dump the | |
613 | mapping, we still have to check if it is something like an ELF | |
614 | header (of a DSO or an executable, for example). If it is, and | |
615 | if the user is interested in dump it, then we should dump it. */ | |
db1ff28b JK |
616 | |
617 | static int | |
8d297bbf | 618 | dump_mapping_p (filter_flags filterflags, const struct smaps_vmflags *v, |
db1ff28b | 619 | int maybe_private_p, int mapping_anon_p, int mapping_file_p, |
57e5e645 | 620 | const char *filename, ULONGEST addr, ULONGEST offset) |
db1ff28b JK |
621 | { |
622 | /* Initially, we trust in what we received from our caller. This | |
623 | value may not be very precise (i.e., it was probably gathered | |
624 | from the permission line in the /proc/PID/smaps list, which | |
625 | actually refers to VM_MAYSHARE, and not VM_SHARED), but it is | |
626 | what we have until we take a look at the "VmFlags:" field | |
627 | (assuming that the version of the Linux kernel being used | |
628 | supports it, of course). */ | |
629 | int private_p = maybe_private_p; | |
57e5e645 | 630 | int dump_p; |
db1ff28b JK |
631 | |
632 | /* We always dump vDSO and vsyscall mappings, because it's likely that | |
633 | there'll be no file to read the contents from at core load time. | |
634 | The kernel does the same. */ | |
635 | if (strcmp ("[vdso]", filename) == 0 | |
636 | || strcmp ("[vsyscall]", filename) == 0) | |
637 | return 1; | |
638 | ||
639 | if (v->initialized_p) | |
640 | { | |
641 | /* We never dump I/O mappings. */ | |
642 | if (v->io_page) | |
643 | return 0; | |
644 | ||
645 | /* Check if we should exclude this mapping. */ | |
afa840dc | 646 | if (!dump_excluded_mappings && v->exclude_coredump) |
db1ff28b JK |
647 | return 0; |
648 | ||
649 | /* Update our notion of whether this mapping is shared or | |
650 | private based on a trustworthy value. */ | |
651 | private_p = !v->shared_mapping; | |
652 | ||
653 | /* HugeTLB checking. */ | |
654 | if (v->uses_huge_tlb) | |
655 | { | |
656 | if ((private_p && (filterflags & COREFILTER_HUGETLB_PRIVATE)) | |
657 | || (!private_p && (filterflags & COREFILTER_HUGETLB_SHARED))) | |
658 | return 1; | |
659 | ||
660 | return 0; | |
661 | } | |
662 | } | |
663 | ||
664 | if (private_p) | |
665 | { | |
666 | if (mapping_anon_p && mapping_file_p) | |
667 | { | |
668 | /* This is a special situation. It can happen when we see a | |
669 | mapping that is file-backed, but that contains anonymous | |
670 | pages. */ | |
57e5e645 SDJ |
671 | dump_p = ((filterflags & COREFILTER_ANON_PRIVATE) != 0 |
672 | || (filterflags & COREFILTER_MAPPED_PRIVATE) != 0); | |
db1ff28b JK |
673 | } |
674 | else if (mapping_anon_p) | |
57e5e645 | 675 | dump_p = (filterflags & COREFILTER_ANON_PRIVATE) != 0; |
db1ff28b | 676 | else |
57e5e645 | 677 | dump_p = (filterflags & COREFILTER_MAPPED_PRIVATE) != 0; |
db1ff28b JK |
678 | } |
679 | else | |
680 | { | |
681 | if (mapping_anon_p && mapping_file_p) | |
682 | { | |
683 | /* This is a special situation. It can happen when we see a | |
684 | mapping that is file-backed, but that contains anonymous | |
685 | pages. */ | |
57e5e645 SDJ |
686 | dump_p = ((filterflags & COREFILTER_ANON_SHARED) != 0 |
687 | || (filterflags & COREFILTER_MAPPED_SHARED) != 0); | |
db1ff28b JK |
688 | } |
689 | else if (mapping_anon_p) | |
57e5e645 | 690 | dump_p = (filterflags & COREFILTER_ANON_SHARED) != 0; |
db1ff28b | 691 | else |
57e5e645 | 692 | dump_p = (filterflags & COREFILTER_MAPPED_SHARED) != 0; |
db1ff28b | 693 | } |
57e5e645 SDJ |
694 | |
695 | /* Even if we decided that we shouldn't dump this mapping, we still | |
696 | have to check whether (a) the user wants us to dump mappings | |
697 | containing an ELF header, and (b) the mapping in question | |
698 | contains an ELF header. If (a) and (b) are true, then we should | |
699 | dump this mapping. | |
700 | ||
701 | A mapping contains an ELF header if it is a private mapping, its | |
702 | offset is zero, and its first word is ELFMAG. */ | |
703 | if (!dump_p && private_p && offset == 0 | |
704 | && (filterflags & COREFILTER_ELF_HEADERS) != 0) | |
705 | { | |
57e5e645 SDJ |
706 | /* Useful define specifying the size of the ELF magical |
707 | header. */ | |
708 | #ifndef SELFMAG | |
709 | #define SELFMAG 4 | |
710 | #endif | |
711 | ||
a5d871dd TT |
712 | /* Let's check if we have an ELF header. */ |
713 | gdb_byte h[SELFMAG]; | |
714 | if (target_read_memory (addr, h, SELFMAG) == 0) | |
57e5e645 | 715 | { |
57e5e645 SDJ |
716 | /* The EI_MAG* and ELFMAG* constants come from |
717 | <elf/common.h>. */ | |
718 | if (h[EI_MAG0] == ELFMAG0 && h[EI_MAG1] == ELFMAG1 | |
719 | && h[EI_MAG2] == ELFMAG2 && h[EI_MAG3] == ELFMAG3) | |
720 | { | |
721 | /* This mapping contains an ELF header, so we | |
722 | should dump it. */ | |
723 | dump_p = 1; | |
724 | } | |
725 | } | |
726 | } | |
727 | ||
728 | return dump_p; | |
db1ff28b JK |
729 | } |
730 | ||
4ba11f89 KB |
731 | /* As above, but return true only when we should dump the NT_FILE |
732 | entry. */ | |
733 | ||
734 | static int | |
735 | dump_note_entry_p (filter_flags filterflags, const struct smaps_vmflags *v, | |
736 | int maybe_private_p, int mapping_anon_p, int mapping_file_p, | |
737 | const char *filename, ULONGEST addr, ULONGEST offset) | |
738 | { | |
739 | /* vDSO and vsyscall mappings will end up in the core file. Don't | |
740 | put them in the NT_FILE note. */ | |
741 | if (strcmp ("[vdso]", filename) == 0 | |
742 | || strcmp ("[vsyscall]", filename) == 0) | |
743 | return 0; | |
744 | ||
745 | /* Otherwise, any other file-based mapping should be placed in the | |
746 | note. */ | |
5b7d45d3 | 747 | return 1; |
4ba11f89 KB |
748 | } |
749 | ||
3030c96e UW |
750 | /* Implement the "info proc" command. */ |
751 | ||
752 | static void | |
7bc112c1 | 753 | linux_info_proc (struct gdbarch *gdbarch, const char *args, |
3030c96e UW |
754 | enum info_proc_what what) |
755 | { | |
756 | /* A long is used for pid instead of an int to avoid a loss of precision | |
757 | compiler warning from the output of strtoul. */ | |
758 | long pid; | |
759 | int cmdline_f = (what == IP_MINIMAL || what == IP_CMDLINE || what == IP_ALL); | |
760 | int cwd_f = (what == IP_MINIMAL || what == IP_CWD || what == IP_ALL); | |
761 | int exe_f = (what == IP_MINIMAL || what == IP_EXE || what == IP_ALL); | |
762 | int mappings_f = (what == IP_MAPPINGS || what == IP_ALL); | |
763 | int status_f = (what == IP_STATUS || what == IP_ALL); | |
764 | int stat_f = (what == IP_STAT || what == IP_ALL); | |
765 | char filename[100]; | |
3030c96e UW |
766 | int target_errno; |
767 | ||
768 | if (args && isdigit (args[0])) | |
7bc112c1 TT |
769 | { |
770 | char *tem; | |
771 | ||
772 | pid = strtoul (args, &tem, 10); | |
773 | args = tem; | |
774 | } | |
3030c96e UW |
775 | else |
776 | { | |
55f6301a | 777 | if (!target_has_execution ()) |
3030c96e UW |
778 | error (_("No current process: you must name one.")); |
779 | if (current_inferior ()->fake_pid_p) | |
780 | error (_("Can't determine the current process's PID: you must name one.")); | |
781 | ||
782 | pid = current_inferior ()->pid; | |
783 | } | |
784 | ||
f1735a53 | 785 | args = skip_spaces (args); |
3030c96e UW |
786 | if (args && args[0]) |
787 | error (_("Too many parameters: %s"), args); | |
788 | ||
789 | printf_filtered (_("process %ld\n"), pid); | |
790 | if (cmdline_f) | |
791 | { | |
792 | xsnprintf (filename, sizeof filename, "/proc/%ld/cmdline", pid); | |
26d6cec4 AA |
793 | gdb_byte *buffer; |
794 | ssize_t len = target_fileio_read_alloc (NULL, filename, &buffer); | |
795 | ||
796 | if (len > 0) | |
797 | { | |
798 | gdb::unique_xmalloc_ptr<char> cmdline ((char *) buffer); | |
799 | ssize_t pos; | |
800 | ||
801 | for (pos = 0; pos < len - 1; pos++) | |
802 | { | |
803 | if (buffer[pos] == '\0') | |
804 | buffer[pos] = ' '; | |
805 | } | |
806 | buffer[len - 1] = '\0'; | |
807 | printf_filtered ("cmdline = '%s'\n", buffer); | |
808 | } | |
3030c96e UW |
809 | else |
810 | warning (_("unable to open /proc file '%s'"), filename); | |
811 | } | |
812 | if (cwd_f) | |
813 | { | |
814 | xsnprintf (filename, sizeof filename, "/proc/%ld/cwd", pid); | |
e0d3522b TT |
815 | gdb::optional<std::string> contents |
816 | = target_fileio_readlink (NULL, filename, &target_errno); | |
817 | if (contents.has_value ()) | |
818 | printf_filtered ("cwd = '%s'\n", contents->c_str ()); | |
3030c96e UW |
819 | else |
820 | warning (_("unable to read link '%s'"), filename); | |
821 | } | |
822 | if (exe_f) | |
823 | { | |
824 | xsnprintf (filename, sizeof filename, "/proc/%ld/exe", pid); | |
e0d3522b TT |
825 | gdb::optional<std::string> contents |
826 | = target_fileio_readlink (NULL, filename, &target_errno); | |
827 | if (contents.has_value ()) | |
828 | printf_filtered ("exe = '%s'\n", contents->c_str ()); | |
3030c96e UW |
829 | else |
830 | warning (_("unable to read link '%s'"), filename); | |
831 | } | |
832 | if (mappings_f) | |
833 | { | |
834 | xsnprintf (filename, sizeof filename, "/proc/%ld/maps", pid); | |
87028b87 TT |
835 | gdb::unique_xmalloc_ptr<char> map |
836 | = target_fileio_read_stralloc (NULL, filename); | |
837 | if (map != NULL) | |
3030c96e | 838 | { |
3030c96e UW |
839 | char *line; |
840 | ||
841 | printf_filtered (_("Mapped address spaces:\n\n")); | |
842 | if (gdbarch_addr_bit (gdbarch) == 32) | |
843 | { | |
844 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
845 | "Start Addr", | |
846 | " End Addr", | |
847 | " Size", " Offset", "objfile"); | |
dda83cd7 | 848 | } |
3030c96e | 849 | else |
dda83cd7 | 850 | { |
3030c96e UW |
851 | printf_filtered (" %18s %18s %10s %10s %s\n", |
852 | "Start Addr", | |
853 | " End Addr", | |
854 | " Size", " Offset", "objfile"); | |
855 | } | |
856 | ||
ca3a04f6 CB |
857 | char *saveptr; |
858 | for (line = strtok_r (map.get (), "\n", &saveptr); | |
87028b87 | 859 | line; |
ca3a04f6 | 860 | line = strtok_r (NULL, "\n", &saveptr)) |
3030c96e UW |
861 | { |
862 | ULONGEST addr, endaddr, offset, inode; | |
b926417a | 863 | const char *permissions, *device, *mapping_filename; |
3030c96e UW |
864 | size_t permissions_len, device_len; |
865 | ||
866 | read_mapping (line, &addr, &endaddr, | |
867 | &permissions, &permissions_len, | |
868 | &offset, &device, &device_len, | |
b926417a | 869 | &inode, &mapping_filename); |
3030c96e UW |
870 | |
871 | if (gdbarch_addr_bit (gdbarch) == 32) | |
dda83cd7 SM |
872 | { |
873 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
3030c96e UW |
874 | paddress (gdbarch, addr), |
875 | paddress (gdbarch, endaddr), | |
876 | hex_string (endaddr - addr), | |
877 | hex_string (offset), | |
b926417a | 878 | *mapping_filename ? mapping_filename : ""); |
3030c96e UW |
879 | } |
880 | else | |
dda83cd7 SM |
881 | { |
882 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
3030c96e UW |
883 | paddress (gdbarch, addr), |
884 | paddress (gdbarch, endaddr), | |
885 | hex_string (endaddr - addr), | |
886 | hex_string (offset), | |
b926417a | 887 | *mapping_filename ? mapping_filename : ""); |
dda83cd7 | 888 | } |
3030c96e | 889 | } |
3030c96e UW |
890 | } |
891 | else | |
892 | warning (_("unable to open /proc file '%s'"), filename); | |
893 | } | |
894 | if (status_f) | |
895 | { | |
896 | xsnprintf (filename, sizeof filename, "/proc/%ld/status", pid); | |
87028b87 TT |
897 | gdb::unique_xmalloc_ptr<char> status |
898 | = target_fileio_read_stralloc (NULL, filename); | |
899 | if (status) | |
900 | puts_filtered (status.get ()); | |
3030c96e UW |
901 | else |
902 | warning (_("unable to open /proc file '%s'"), filename); | |
903 | } | |
904 | if (stat_f) | |
905 | { | |
906 | xsnprintf (filename, sizeof filename, "/proc/%ld/stat", pid); | |
87028b87 TT |
907 | gdb::unique_xmalloc_ptr<char> statstr |
908 | = target_fileio_read_stralloc (NULL, filename); | |
909 | if (statstr) | |
3030c96e | 910 | { |
87028b87 | 911 | const char *p = statstr.get (); |
3030c96e UW |
912 | |
913 | printf_filtered (_("Process: %s\n"), | |
914 | pulongest (strtoulst (p, &p, 10))); | |
915 | ||
f1735a53 | 916 | p = skip_spaces (p); |
a71b5a38 | 917 | if (*p == '(') |
3030c96e | 918 | { |
184cd072 JK |
919 | /* ps command also relies on no trailing fields |
920 | ever contain ')'. */ | |
921 | const char *ep = strrchr (p, ')'); | |
a71b5a38 UW |
922 | if (ep != NULL) |
923 | { | |
924 | printf_filtered ("Exec file: %.*s\n", | |
925 | (int) (ep - p - 1), p + 1); | |
926 | p = ep + 1; | |
927 | } | |
3030c96e UW |
928 | } |
929 | ||
f1735a53 | 930 | p = skip_spaces (p); |
3030c96e UW |
931 | if (*p) |
932 | printf_filtered (_("State: %c\n"), *p++); | |
933 | ||
934 | if (*p) | |
935 | printf_filtered (_("Parent process: %s\n"), | |
936 | pulongest (strtoulst (p, &p, 10))); | |
937 | if (*p) | |
938 | printf_filtered (_("Process group: %s\n"), | |
939 | pulongest (strtoulst (p, &p, 10))); | |
940 | if (*p) | |
941 | printf_filtered (_("Session id: %s\n"), | |
942 | pulongest (strtoulst (p, &p, 10))); | |
943 | if (*p) | |
944 | printf_filtered (_("TTY: %s\n"), | |
945 | pulongest (strtoulst (p, &p, 10))); | |
946 | if (*p) | |
947 | printf_filtered (_("TTY owner process group: %s\n"), | |
948 | pulongest (strtoulst (p, &p, 10))); | |
949 | ||
950 | if (*p) | |
951 | printf_filtered (_("Flags: %s\n"), | |
952 | hex_string (strtoulst (p, &p, 10))); | |
953 | if (*p) | |
954 | printf_filtered (_("Minor faults (no memory page): %s\n"), | |
955 | pulongest (strtoulst (p, &p, 10))); | |
956 | if (*p) | |
957 | printf_filtered (_("Minor faults, children: %s\n"), | |
958 | pulongest (strtoulst (p, &p, 10))); | |
959 | if (*p) | |
960 | printf_filtered (_("Major faults (memory page faults): %s\n"), | |
961 | pulongest (strtoulst (p, &p, 10))); | |
962 | if (*p) | |
963 | printf_filtered (_("Major faults, children: %s\n"), | |
964 | pulongest (strtoulst (p, &p, 10))); | |
965 | if (*p) | |
966 | printf_filtered (_("utime: %s\n"), | |
967 | pulongest (strtoulst (p, &p, 10))); | |
968 | if (*p) | |
969 | printf_filtered (_("stime: %s\n"), | |
970 | pulongest (strtoulst (p, &p, 10))); | |
971 | if (*p) | |
972 | printf_filtered (_("utime, children: %s\n"), | |
973 | pulongest (strtoulst (p, &p, 10))); | |
974 | if (*p) | |
975 | printf_filtered (_("stime, children: %s\n"), | |
976 | pulongest (strtoulst (p, &p, 10))); | |
977 | if (*p) | |
978 | printf_filtered (_("jiffies remaining in current " | |
979 | "time slice: %s\n"), | |
980 | pulongest (strtoulst (p, &p, 10))); | |
981 | if (*p) | |
982 | printf_filtered (_("'nice' value: %s\n"), | |
983 | pulongest (strtoulst (p, &p, 10))); | |
984 | if (*p) | |
985 | printf_filtered (_("jiffies until next timeout: %s\n"), | |
986 | pulongest (strtoulst (p, &p, 10))); | |
987 | if (*p) | |
988 | printf_filtered (_("jiffies until next SIGALRM: %s\n"), | |
989 | pulongest (strtoulst (p, &p, 10))); | |
990 | if (*p) | |
991 | printf_filtered (_("start time (jiffies since " | |
992 | "system boot): %s\n"), | |
993 | pulongest (strtoulst (p, &p, 10))); | |
994 | if (*p) | |
995 | printf_filtered (_("Virtual memory size: %s\n"), | |
996 | pulongest (strtoulst (p, &p, 10))); | |
997 | if (*p) | |
998 | printf_filtered (_("Resident set size: %s\n"), | |
999 | pulongest (strtoulst (p, &p, 10))); | |
1000 | if (*p) | |
1001 | printf_filtered (_("rlim: %s\n"), | |
1002 | pulongest (strtoulst (p, &p, 10))); | |
1003 | if (*p) | |
1004 | printf_filtered (_("Start of text: %s\n"), | |
1005 | hex_string (strtoulst (p, &p, 10))); | |
1006 | if (*p) | |
1007 | printf_filtered (_("End of text: %s\n"), | |
1008 | hex_string (strtoulst (p, &p, 10))); | |
1009 | if (*p) | |
1010 | printf_filtered (_("Start of stack: %s\n"), | |
1011 | hex_string (strtoulst (p, &p, 10))); | |
1012 | #if 0 /* Don't know how architecture-dependent the rest is... | |
1013 | Anyway the signal bitmap info is available from "status". */ | |
1014 | if (*p) | |
1015 | printf_filtered (_("Kernel stack pointer: %s\n"), | |
1016 | hex_string (strtoulst (p, &p, 10))); | |
1017 | if (*p) | |
1018 | printf_filtered (_("Kernel instr pointer: %s\n"), | |
1019 | hex_string (strtoulst (p, &p, 10))); | |
1020 | if (*p) | |
1021 | printf_filtered (_("Pending signals bitmap: %s\n"), | |
1022 | hex_string (strtoulst (p, &p, 10))); | |
1023 | if (*p) | |
1024 | printf_filtered (_("Blocked signals bitmap: %s\n"), | |
1025 | hex_string (strtoulst (p, &p, 10))); | |
1026 | if (*p) | |
1027 | printf_filtered (_("Ignored signals bitmap: %s\n"), | |
1028 | hex_string (strtoulst (p, &p, 10))); | |
1029 | if (*p) | |
1030 | printf_filtered (_("Catched signals bitmap: %s\n"), | |
1031 | hex_string (strtoulst (p, &p, 10))); | |
1032 | if (*p) | |
1033 | printf_filtered (_("wchan (system call): %s\n"), | |
1034 | hex_string (strtoulst (p, &p, 10))); | |
1035 | #endif | |
3030c96e UW |
1036 | } |
1037 | else | |
1038 | warning (_("unable to open /proc file '%s'"), filename); | |
1039 | } | |
1040 | } | |
1041 | ||
db082f59 KB |
1042 | /* Implementation of `gdbarch_read_core_file_mappings', as defined in |
1043 | gdbarch.h. | |
1044 | ||
1045 | This function reads the NT_FILE note (which BFD turns into the | |
1046 | section ".note.linuxcore.file"). The format of this note / section | |
1047 | is described as follows in the Linux kernel sources in | |
1048 | fs/binfmt_elf.c: | |
1049 | ||
1050 | long count -- how many files are mapped | |
1051 | long page_size -- units for file_ofs | |
1052 | array of [COUNT] elements of | |
1053 | long start | |
1054 | long end | |
1055 | long file_ofs | |
1056 | followed by COUNT filenames in ASCII: "FILE1" NUL "FILE2" NUL... | |
1057 | ||
1058 | CBFD is the BFD of the core file. | |
1059 | ||
1060 | PRE_LOOP_CB is the callback function to invoke prior to starting | |
1061 | the loop which processes individual entries. This callback will | |
1062 | only be executed after the note has been examined in enough | |
1063 | detail to verify that it's not malformed in some way. | |
1064 | ||
1065 | LOOP_CB is the callback function that will be executed once | |
1066 | for each mapping. */ | |
451b7c33 TT |
1067 | |
1068 | static void | |
db082f59 KB |
1069 | linux_read_core_file_mappings (struct gdbarch *gdbarch, |
1070 | struct bfd *cbfd, | |
1071 | gdb::function_view<void (ULONGEST count)> | |
dda83cd7 | 1072 | pre_loop_cb, |
db082f59 | 1073 | gdb::function_view<void (int num, |
dda83cd7 | 1074 | ULONGEST start, |
db082f59 KB |
1075 | ULONGEST end, |
1076 | ULONGEST file_ofs, | |
70125a45 | 1077 | const char *filename)> |
db082f59 | 1078 | loop_cb) |
451b7c33 | 1079 | { |
db082f59 | 1080 | /* Ensure that ULONGEST is big enough for reading 64-bit core files. */ |
451b7c33 TT |
1081 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
1082 | ||
db082f59 KB |
1083 | /* It's not required that the NT_FILE note exists, so return silently |
1084 | if it's not found. Beyond this point though, we'll complain | |
1085 | if problems are found. */ | |
1086 | asection *section = bfd_get_section_by_name (cbfd, ".note.linuxcore.file"); | |
1087 | if (section == nullptr) | |
1088 | return; | |
451b7c33 | 1089 | |
db082f59 KB |
1090 | unsigned int addr_size_bits = gdbarch_addr_bit (gdbarch); |
1091 | unsigned int addr_size = addr_size_bits / 8; | |
1092 | size_t note_size = bfd_section_size (section); | |
451b7c33 TT |
1093 | |
1094 | if (note_size < 2 * addr_size) | |
db082f59 KB |
1095 | { |
1096 | warning (_("malformed core note - too short for header")); | |
1097 | return; | |
1098 | } | |
451b7c33 | 1099 | |
db082f59 | 1100 | gdb::def_vector<gdb_byte> contents (note_size); |
9f584b37 TT |
1101 | if (!bfd_get_section_contents (core_bfd, section, contents.data (), |
1102 | 0, note_size)) | |
db082f59 KB |
1103 | { |
1104 | warning (_("could not get core note contents")); | |
1105 | return; | |
1106 | } | |
451b7c33 | 1107 | |
db082f59 KB |
1108 | gdb_byte *descdata = contents.data (); |
1109 | char *descend = (char *) descdata + note_size; | |
451b7c33 TT |
1110 | |
1111 | if (descdata[note_size - 1] != '\0') | |
db082f59 KB |
1112 | { |
1113 | warning (_("malformed note - does not end with \\0")); | |
1114 | return; | |
1115 | } | |
451b7c33 | 1116 | |
db082f59 | 1117 | ULONGEST count = bfd_get (addr_size_bits, core_bfd, descdata); |
451b7c33 TT |
1118 | descdata += addr_size; |
1119 | ||
db082f59 | 1120 | ULONGEST page_size = bfd_get (addr_size_bits, core_bfd, descdata); |
451b7c33 TT |
1121 | descdata += addr_size; |
1122 | ||
1123 | if (note_size < 2 * addr_size + count * 3 * addr_size) | |
451b7c33 | 1124 | { |
db082f59 KB |
1125 | warning (_("malformed note - too short for supplied file count")); |
1126 | return; | |
451b7c33 TT |
1127 | } |
1128 | ||
db082f59 KB |
1129 | char *filenames = (char *) descdata + count * 3 * addr_size; |
1130 | ||
1131 | /* Make sure that the correct number of filenames exist. Complain | |
1132 | if there aren't enough or are too many. */ | |
1133 | char *f = filenames; | |
1134 | for (int i = 0; i < count; i++) | |
451b7c33 | 1135 | { |
db082f59 | 1136 | if (f >= descend) |
dda83cd7 | 1137 | { |
db082f59 KB |
1138 | warning (_("malformed note - filename area is too small")); |
1139 | return; | |
1140 | } | |
1141 | f += strnlen (f, descend - f) + 1; | |
1142 | } | |
1143 | /* Complain, but don't return early if the filename area is too big. */ | |
1144 | if (f != descend) | |
1145 | warning (_("malformed note - filename area is too big")); | |
451b7c33 | 1146 | |
db082f59 | 1147 | pre_loop_cb (count); |
451b7c33 | 1148 | |
db082f59 KB |
1149 | for (int i = 0; i < count; i++) |
1150 | { | |
1151 | ULONGEST start = bfd_get (addr_size_bits, core_bfd, descdata); | |
451b7c33 | 1152 | descdata += addr_size; |
db082f59 | 1153 | ULONGEST end = bfd_get (addr_size_bits, core_bfd, descdata); |
451b7c33 | 1154 | descdata += addr_size; |
db082f59 | 1155 | ULONGEST file_ofs |
dda83cd7 | 1156 | = bfd_get (addr_size_bits, core_bfd, descdata) * page_size; |
451b7c33 | 1157 | descdata += addr_size; |
db082f59 KB |
1158 | char * filename = filenames; |
1159 | filenames += strlen ((char *) filenames) + 1; | |
451b7c33 | 1160 | |
70125a45 | 1161 | loop_cb (i, start, end, file_ofs, filename); |
451b7c33 | 1162 | } |
451b7c33 TT |
1163 | } |
1164 | ||
db082f59 KB |
1165 | /* Implement "info proc mappings" for a corefile. */ |
1166 | ||
1167 | static void | |
1168 | linux_core_info_proc_mappings (struct gdbarch *gdbarch, const char *args) | |
1169 | { | |
1170 | linux_read_core_file_mappings (gdbarch, core_bfd, | |
1171 | [=] (ULONGEST count) | |
1172 | { | |
1173 | printf_filtered (_("Mapped address spaces:\n\n")); | |
1174 | if (gdbarch_addr_bit (gdbarch) == 32) | |
1175 | { | |
1176 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
1177 | "Start Addr", | |
1178 | " End Addr", | |
1179 | " Size", " Offset", "objfile"); | |
1180 | } | |
1181 | else | |
1182 | { | |
1183 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
1184 | "Start Addr", | |
1185 | " End Addr", | |
1186 | " Size", " Offset", "objfile"); | |
1187 | } | |
1188 | }, | |
1189 | [=] (int num, ULONGEST start, ULONGEST end, ULONGEST file_ofs, | |
70125a45 | 1190 | const char *filename) |
db082f59 KB |
1191 | { |
1192 | if (gdbarch_addr_bit (gdbarch) == 32) | |
1193 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
1194 | paddress (gdbarch, start), | |
1195 | paddress (gdbarch, end), | |
1196 | hex_string (end - start), | |
1197 | hex_string (file_ofs), | |
1198 | filename); | |
1199 | else | |
1200 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
1201 | paddress (gdbarch, start), | |
1202 | paddress (gdbarch, end), | |
1203 | hex_string (end - start), | |
1204 | hex_string (file_ofs), | |
1205 | filename); | |
1206 | }); | |
1207 | } | |
1208 | ||
451b7c33 TT |
1209 | /* Implement "info proc" for a corefile. */ |
1210 | ||
1211 | static void | |
7bc112c1 | 1212 | linux_core_info_proc (struct gdbarch *gdbarch, const char *args, |
451b7c33 TT |
1213 | enum info_proc_what what) |
1214 | { | |
1215 | int exe_f = (what == IP_MINIMAL || what == IP_EXE || what == IP_ALL); | |
1216 | int mappings_f = (what == IP_MAPPINGS || what == IP_ALL); | |
1217 | ||
1218 | if (exe_f) | |
1219 | { | |
1220 | const char *exe; | |
1221 | ||
1222 | exe = bfd_core_file_failing_command (core_bfd); | |
1223 | if (exe != NULL) | |
1224 | printf_filtered ("exe = '%s'\n", exe); | |
1225 | else | |
1226 | warning (_("unable to find command name in core file")); | |
1227 | } | |
1228 | ||
1229 | if (mappings_f) | |
1230 | linux_core_info_proc_mappings (gdbarch, args); | |
1231 | ||
1232 | if (!exe_f && !mappings_f) | |
1233 | error (_("unable to handle request")); | |
1234 | } | |
1235 | ||
382b69bb JB |
1236 | /* Read siginfo data from the core, if possible. Returns -1 on |
1237 | failure. Otherwise, returns the number of bytes read. READBUF, | |
1238 | OFFSET, and LEN are all as specified by the to_xfer_partial | |
1239 | interface. */ | |
1240 | ||
1241 | static LONGEST | |
1242 | linux_core_xfer_siginfo (struct gdbarch *gdbarch, gdb_byte *readbuf, | |
1243 | ULONGEST offset, ULONGEST len) | |
1244 | { | |
1245 | thread_section_name section_name (".note.linuxcore.siginfo", inferior_ptid); | |
1246 | asection *section = bfd_get_section_by_name (core_bfd, section_name.c_str ()); | |
1247 | if (section == NULL) | |
1248 | return -1; | |
1249 | ||
1250 | if (!bfd_get_section_contents (core_bfd, section, readbuf, offset, len)) | |
1251 | return -1; | |
1252 | ||
1253 | return len; | |
1254 | } | |
1255 | ||
db1ff28b JK |
1256 | typedef int linux_find_memory_region_ftype (ULONGEST vaddr, ULONGEST size, |
1257 | ULONGEST offset, ULONGEST inode, | |
1258 | int read, int write, | |
1259 | int exec, int modified, | |
1260 | const char *filename, | |
1261 | void *data); | |
451b7c33 | 1262 | |
4ba11f89 KB |
1263 | typedef int linux_dump_mapping_p_ftype (filter_flags filterflags, |
1264 | const struct smaps_vmflags *v, | |
1265 | int maybe_private_p, | |
1266 | int mapping_anon_p, | |
1267 | int mapping_file_p, | |
1268 | const char *filename, | |
1269 | ULONGEST addr, | |
1270 | ULONGEST offset); | |
1271 | ||
db1ff28b | 1272 | /* List memory regions in the inferior for a corefile. */ |
451b7c33 TT |
1273 | |
1274 | static int | |
db1ff28b | 1275 | linux_find_memory_regions_full (struct gdbarch *gdbarch, |
4ba11f89 | 1276 | linux_dump_mapping_p_ftype *should_dump_mapping_p, |
db1ff28b JK |
1277 | linux_find_memory_region_ftype *func, |
1278 | void *obfd) | |
f7af1fcd | 1279 | { |
db1ff28b JK |
1280 | char mapsfilename[100]; |
1281 | char coredumpfilter_name[100]; | |
f7af1fcd JK |
1282 | pid_t pid; |
1283 | /* Default dump behavior of coredump_filter (0x33), according to | |
1284 | Documentation/filesystems/proc.txt from the Linux kernel | |
1285 | tree. */ | |
8d297bbf PA |
1286 | filter_flags filterflags = (COREFILTER_ANON_PRIVATE |
1287 | | COREFILTER_ANON_SHARED | |
1288 | | COREFILTER_ELF_HEADERS | |
1289 | | COREFILTER_HUGETLB_PRIVATE); | |
f7af1fcd | 1290 | |
db1ff28b | 1291 | /* We need to know the real target PID to access /proc. */ |
f7af1fcd | 1292 | if (current_inferior ()->fake_pid_p) |
db1ff28b | 1293 | return 1; |
f7af1fcd JK |
1294 | |
1295 | pid = current_inferior ()->pid; | |
1296 | ||
1297 | if (use_coredump_filter) | |
1298 | { | |
f7af1fcd JK |
1299 | xsnprintf (coredumpfilter_name, sizeof (coredumpfilter_name), |
1300 | "/proc/%d/coredump_filter", pid); | |
87028b87 TT |
1301 | gdb::unique_xmalloc_ptr<char> coredumpfilterdata |
1302 | = target_fileio_read_stralloc (NULL, coredumpfilter_name); | |
f7af1fcd JK |
1303 | if (coredumpfilterdata != NULL) |
1304 | { | |
8d297bbf PA |
1305 | unsigned int flags; |
1306 | ||
87028b87 | 1307 | sscanf (coredumpfilterdata.get (), "%x", &flags); |
8d297bbf | 1308 | filterflags = (enum filter_flag) flags; |
f7af1fcd JK |
1309 | } |
1310 | } | |
1311 | ||
db1ff28b | 1312 | xsnprintf (mapsfilename, sizeof mapsfilename, "/proc/%d/smaps", pid); |
87028b87 TT |
1313 | gdb::unique_xmalloc_ptr<char> data |
1314 | = target_fileio_read_stralloc (NULL, mapsfilename); | |
db1ff28b JK |
1315 | if (data == NULL) |
1316 | { | |
1317 | /* Older Linux kernels did not support /proc/PID/smaps. */ | |
1318 | xsnprintf (mapsfilename, sizeof mapsfilename, "/proc/%d/maps", pid); | |
1319 | data = target_fileio_read_stralloc (NULL, mapsfilename); | |
1320 | } | |
1321 | ||
1322 | if (data != NULL) | |
1323 | { | |
db1ff28b JK |
1324 | char *line, *t; |
1325 | ||
87028b87 | 1326 | line = strtok_r (data.get (), "\n", &t); |
db1ff28b JK |
1327 | while (line != NULL) |
1328 | { | |
1329 | ULONGEST addr, endaddr, offset, inode; | |
1330 | const char *permissions, *device, *filename; | |
1331 | struct smaps_vmflags v; | |
1332 | size_t permissions_len, device_len; | |
1333 | int read, write, exec, priv; | |
1334 | int has_anonymous = 0; | |
1335 | int should_dump_p = 0; | |
1336 | int mapping_anon_p; | |
1337 | int mapping_file_p; | |
1338 | ||
1339 | memset (&v, 0, sizeof (v)); | |
1340 | read_mapping (line, &addr, &endaddr, &permissions, &permissions_len, | |
1341 | &offset, &device, &device_len, &inode, &filename); | |
1342 | mapping_anon_p = mapping_is_anonymous_p (filename); | |
1343 | /* If the mapping is not anonymous, then we can consider it | |
1344 | to be file-backed. These two states (anonymous or | |
1345 | file-backed) seem to be exclusive, but they can actually | |
1346 | coexist. For example, if a file-backed mapping has | |
1347 | "Anonymous:" pages (see more below), then the Linux | |
1348 | kernel will dump this mapping when the user specified | |
1349 | that she only wants anonymous mappings in the corefile | |
1350 | (*even* when she explicitly disabled the dumping of | |
1351 | file-backed mappings). */ | |
1352 | mapping_file_p = !mapping_anon_p; | |
1353 | ||
1354 | /* Decode permissions. */ | |
1355 | read = (memchr (permissions, 'r', permissions_len) != 0); | |
1356 | write = (memchr (permissions, 'w', permissions_len) != 0); | |
1357 | exec = (memchr (permissions, 'x', permissions_len) != 0); | |
1358 | /* 'private' here actually means VM_MAYSHARE, and not | |
1359 | VM_SHARED. In order to know if a mapping is really | |
1360 | private or not, we must check the flag "sh" in the | |
1361 | VmFlags field. This is done by decode_vmflags. However, | |
1362 | if we are using a Linux kernel released before the commit | |
1363 | 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10), we will | |
1364 | not have the VmFlags there. In this case, there is | |
1365 | really no way to know if we are dealing with VM_SHARED, | |
1366 | so we just assume that VM_MAYSHARE is enough. */ | |
1367 | priv = memchr (permissions, 'p', permissions_len) != 0; | |
1368 | ||
1369 | /* Try to detect if region should be dumped by parsing smaps | |
1370 | counters. */ | |
1371 | for (line = strtok_r (NULL, "\n", &t); | |
1372 | line != NULL && line[0] >= 'A' && line[0] <= 'Z'; | |
1373 | line = strtok_r (NULL, "\n", &t)) | |
1374 | { | |
1375 | char keyword[64 + 1]; | |
1376 | ||
1377 | if (sscanf (line, "%64s", keyword) != 1) | |
1378 | { | |
1379 | warning (_("Error parsing {s,}maps file '%s'"), mapsfilename); | |
1380 | break; | |
1381 | } | |
1382 | ||
1383 | if (strcmp (keyword, "Anonymous:") == 0) | |
1384 | { | |
1385 | /* Older Linux kernels did not support the | |
1386 | "Anonymous:" counter. Check it here. */ | |
1387 | has_anonymous = 1; | |
1388 | } | |
1389 | else if (strcmp (keyword, "VmFlags:") == 0) | |
1390 | decode_vmflags (line, &v); | |
1391 | ||
1392 | if (strcmp (keyword, "AnonHugePages:") == 0 | |
1393 | || strcmp (keyword, "Anonymous:") == 0) | |
1394 | { | |
1395 | unsigned long number; | |
1396 | ||
1397 | if (sscanf (line, "%*s%lu", &number) != 1) | |
1398 | { | |
1399 | warning (_("Error parsing {s,}maps file '%s' number"), | |
1400 | mapsfilename); | |
1401 | break; | |
1402 | } | |
1403 | if (number > 0) | |
1404 | { | |
1405 | /* Even if we are dealing with a file-backed | |
1406 | mapping, if it contains anonymous pages we | |
1407 | consider it to be *also* an anonymous | |
1408 | mapping, because this is what the Linux | |
1409 | kernel does: | |
1410 | ||
1411 | // Dump segments that have been written to. | |
1412 | if (vma->anon_vma && FILTER(ANON_PRIVATE)) | |
1413 | goto whole; | |
1414 | ||
1415 | Note that if the mapping is already marked as | |
1416 | file-backed (i.e., mapping_file_p is | |
1417 | non-zero), then this is a special case, and | |
1418 | this mapping will be dumped either when the | |
1419 | user wants to dump file-backed *or* anonymous | |
1420 | mappings. */ | |
1421 | mapping_anon_p = 1; | |
1422 | } | |
1423 | } | |
1424 | } | |
1425 | ||
1426 | if (has_anonymous) | |
4ba11f89 | 1427 | should_dump_p = should_dump_mapping_p (filterflags, &v, priv, |
dda83cd7 | 1428 | mapping_anon_p, |
4ba11f89 | 1429 | mapping_file_p, |
dda83cd7 | 1430 | filename, addr, offset); |
db1ff28b JK |
1431 | else |
1432 | { | |
1433 | /* Older Linux kernels did not support the "Anonymous:" counter. | |
1434 | If it is missing, we can't be sure - dump all the pages. */ | |
1435 | should_dump_p = 1; | |
1436 | } | |
1437 | ||
1438 | /* Invoke the callback function to create the corefile segment. */ | |
1439 | if (should_dump_p) | |
1440 | func (addr, endaddr - addr, offset, inode, | |
1441 | read, write, exec, 1, /* MODIFIED is true because we | |
1442 | want to dump the mapping. */ | |
1443 | filename, obfd); | |
1444 | } | |
1445 | ||
db1ff28b JK |
1446 | return 0; |
1447 | } | |
1448 | ||
1449 | return 1; | |
1450 | } | |
1451 | ||
1452 | /* A structure for passing information through | |
1453 | linux_find_memory_regions_full. */ | |
1454 | ||
1455 | struct linux_find_memory_regions_data | |
1456 | { | |
1457 | /* The original callback. */ | |
1458 | ||
1459 | find_memory_region_ftype func; | |
1460 | ||
1461 | /* The original datum. */ | |
1462 | ||
1463 | void *obfd; | |
1464 | }; | |
1465 | ||
1466 | /* A callback for linux_find_memory_regions that converts between the | |
1467 | "full"-style callback and find_memory_region_ftype. */ | |
1468 | ||
1469 | static int | |
1470 | linux_find_memory_regions_thunk (ULONGEST vaddr, ULONGEST size, | |
1471 | ULONGEST offset, ULONGEST inode, | |
1472 | int read, int write, int exec, int modified, | |
1473 | const char *filename, void *arg) | |
1474 | { | |
9a3c8263 SM |
1475 | struct linux_find_memory_regions_data *data |
1476 | = (struct linux_find_memory_regions_data *) arg; | |
db1ff28b JK |
1477 | |
1478 | return data->func (vaddr, size, read, write, exec, modified, data->obfd); | |
451b7c33 TT |
1479 | } |
1480 | ||
1481 | /* A variant of linux_find_memory_regions_full that is suitable as the | |
1482 | gdbarch find_memory_regions method. */ | |
1483 | ||
1484 | static int | |
1485 | linux_find_memory_regions (struct gdbarch *gdbarch, | |
db1ff28b | 1486 | find_memory_region_ftype func, void *obfd) |
451b7c33 TT |
1487 | { |
1488 | struct linux_find_memory_regions_data data; | |
1489 | ||
1490 | data.func = func; | |
db1ff28b | 1491 | data.obfd = obfd; |
451b7c33 | 1492 | |
db1ff28b | 1493 | return linux_find_memory_regions_full (gdbarch, |
4ba11f89 | 1494 | dump_mapping_p, |
db1ff28b JK |
1495 | linux_find_memory_regions_thunk, |
1496 | &data); | |
451b7c33 TT |
1497 | } |
1498 | ||
451b7c33 TT |
1499 | /* This is used to pass information from |
1500 | linux_make_mappings_corefile_notes through | |
1501 | linux_find_memory_regions_full. */ | |
1502 | ||
1503 | struct linux_make_mappings_data | |
1504 | { | |
1505 | /* Number of files mapped. */ | |
1506 | ULONGEST file_count; | |
1507 | ||
1508 | /* The obstack for the main part of the data. */ | |
1509 | struct obstack *data_obstack; | |
1510 | ||
1511 | /* The filename obstack. */ | |
1512 | struct obstack *filename_obstack; | |
1513 | ||
1514 | /* The architecture's "long" type. */ | |
1515 | struct type *long_type; | |
1516 | }; | |
1517 | ||
1518 | static linux_find_memory_region_ftype linux_make_mappings_callback; | |
1519 | ||
1520 | /* A callback for linux_find_memory_regions_full that updates the | |
1521 | mappings data for linux_make_mappings_corefile_notes. */ | |
1522 | ||
1523 | static int | |
1524 | linux_make_mappings_callback (ULONGEST vaddr, ULONGEST size, | |
1525 | ULONGEST offset, ULONGEST inode, | |
1526 | int read, int write, int exec, int modified, | |
1527 | const char *filename, void *data) | |
1528 | { | |
9a3c8263 SM |
1529 | struct linux_make_mappings_data *map_data |
1530 | = (struct linux_make_mappings_data *) data; | |
451b7c33 TT |
1531 | gdb_byte buf[sizeof (ULONGEST)]; |
1532 | ||
1533 | if (*filename == '\0' || inode == 0) | |
1534 | return 0; | |
1535 | ||
1536 | ++map_data->file_count; | |
1537 | ||
1538 | pack_long (buf, map_data->long_type, vaddr); | |
1539 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1540 | pack_long (buf, map_data->long_type, vaddr + size); | |
1541 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1542 | pack_long (buf, map_data->long_type, offset); | |
1543 | obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type)); | |
1544 | ||
1545 | obstack_grow_str0 (map_data->filename_obstack, filename); | |
1546 | ||
1547 | return 0; | |
1548 | } | |
1549 | ||
1550 | /* Write the file mapping data to the core file, if possible. OBFD is | |
1551 | the output BFD. NOTE_DATA is the current note data, and NOTE_SIZE | |
c21f37a8 | 1552 | is a pointer to the note size. Updates NOTE_DATA and NOTE_SIZE. */ |
451b7c33 | 1553 | |
c21f37a8 | 1554 | static void |
451b7c33 | 1555 | linux_make_mappings_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, |
c21f37a8 SM |
1556 | gdb::unique_xmalloc_ptr<char> ¬e_data, |
1557 | int *note_size) | |
451b7c33 | 1558 | { |
451b7c33 TT |
1559 | struct linux_make_mappings_data mapping_data; |
1560 | struct type *long_type | |
1561 | = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), 0, "long"); | |
1562 | gdb_byte buf[sizeof (ULONGEST)]; | |
1563 | ||
8268c778 | 1564 | auto_obstack data_obstack, filename_obstack; |
451b7c33 TT |
1565 | |
1566 | mapping_data.file_count = 0; | |
1567 | mapping_data.data_obstack = &data_obstack; | |
1568 | mapping_data.filename_obstack = &filename_obstack; | |
1569 | mapping_data.long_type = long_type; | |
1570 | ||
1571 | /* Reserve space for the count. */ | |
1572 | obstack_blank (&data_obstack, TYPE_LENGTH (long_type)); | |
1573 | /* We always write the page size as 1 since we have no good way to | |
1574 | determine the correct value. */ | |
1575 | pack_long (buf, long_type, 1); | |
1576 | obstack_grow (&data_obstack, buf, TYPE_LENGTH (long_type)); | |
1577 | ||
4ba11f89 KB |
1578 | linux_find_memory_regions_full (gdbarch, |
1579 | dump_note_entry_p, | |
1580 | linux_make_mappings_callback, | |
db1ff28b | 1581 | &mapping_data); |
451b7c33 TT |
1582 | |
1583 | if (mapping_data.file_count != 0) | |
1584 | { | |
1585 | /* Write the count to the obstack. */ | |
51a5cd90 PA |
1586 | pack_long ((gdb_byte *) obstack_base (&data_obstack), |
1587 | long_type, mapping_data.file_count); | |
451b7c33 TT |
1588 | |
1589 | /* Copy the filenames to the data obstack. */ | |
3fba72f7 | 1590 | int size = obstack_object_size (&filename_obstack); |
451b7c33 | 1591 | obstack_grow (&data_obstack, obstack_base (&filename_obstack), |
3fba72f7 | 1592 | size); |
451b7c33 | 1593 | |
c21f37a8 SM |
1594 | note_data.reset (elfcore_write_note |
1595 | (obfd, note_data.release (), | |
1596 | note_size, "CORE", NT_FILE, | |
1597 | obstack_base (&data_obstack), | |
1598 | obstack_object_size (&data_obstack))); | |
451b7c33 | 1599 | } |
451b7c33 TT |
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 | { | |
c21f37a8 SM |
1608 | linux_collect_regset_section_cb_data (struct gdbarch *gdbarch, |
1609 | const struct regcache *regcache, | |
1610 | bfd *obfd, | |
1611 | gdb::unique_xmalloc_ptr<char> ¬e_data, | |
1612 | int *note_size, | |
1613 | unsigned long lwp, | |
1614 | gdb_signal stop_signal) | |
1615 | : gdbarch (gdbarch), regcache (regcache), obfd (obfd), | |
1616 | note_data (note_data), note_size (note_size), lwp (lwp), | |
1617 | stop_signal (stop_signal) | |
1618 | {} | |
1619 | ||
5aa82d05 AA |
1620 | struct gdbarch *gdbarch; |
1621 | const struct regcache *regcache; | |
1622 | bfd *obfd; | |
c21f37a8 | 1623 | gdb::unique_xmalloc_ptr<char> ¬e_data; |
5aa82d05 AA |
1624 | int *note_size; |
1625 | unsigned long lwp; | |
1626 | enum gdb_signal stop_signal; | |
c21f37a8 | 1627 | bool abort_iteration = false; |
5aa82d05 AA |
1628 | }; |
1629 | ||
1630 | /* Callback for iterate_over_regset_sections that records a single | |
1631 | regset in the corefile note section. */ | |
1632 | ||
1633 | static void | |
a616bb94 AH |
1634 | linux_collect_regset_section_cb (const char *sect_name, int supply_size, |
1635 | int collect_size, const struct regset *regset, | |
5aa82d05 AA |
1636 | const char *human_name, void *cb_data) |
1637 | { | |
7567e115 SM |
1638 | struct linux_collect_regset_section_cb_data *data |
1639 | = (struct linux_collect_regset_section_cb_data *) cb_data; | |
a616bb94 AH |
1640 | bool variable_size_section = (regset != NULL |
1641 | && regset->flags & REGSET_VARIABLE_SIZE); | |
1642 | ||
1643 | if (!variable_size_section) | |
1644 | gdb_assert (supply_size == collect_size); | |
5aa82d05 AA |
1645 | |
1646 | if (data->abort_iteration) | |
1647 | return; | |
1648 | ||
5aa82d05 AA |
1649 | gdb_assert (regset && regset->collect_regset); |
1650 | ||
afde3032 PFC |
1651 | /* This is intentionally zero-initialized by using std::vector, so |
1652 | that any padding bytes in the core file will show as 0. */ | |
1653 | std::vector<gdb_byte> buf (collect_size); | |
1654 | ||
1655 | regset->collect_regset (regset, data->regcache, -1, buf.data (), | |
1656 | collect_size); | |
5aa82d05 AA |
1657 | |
1658 | /* PRSTATUS still needs to be treated specially. */ | |
1659 | if (strcmp (sect_name, ".reg") == 0) | |
c21f37a8 SM |
1660 | data->note_data.reset (elfcore_write_prstatus |
1661 | (data->obfd, data->note_data.release (), | |
1662 | data->note_size, data->lwp, | |
1663 | gdb_signal_to_host (data->stop_signal), | |
1664 | buf.data ())); | |
5aa82d05 | 1665 | else |
c21f37a8 SM |
1666 | data->note_data.reset (elfcore_write_register_note |
1667 | (data->obfd, data->note_data.release (), | |
1668 | data->note_size, sect_name, buf.data (), | |
1669 | collect_size)); | |
5aa82d05 AA |
1670 | |
1671 | if (data->note_data == NULL) | |
c21f37a8 | 1672 | data->abort_iteration = true; |
5aa82d05 AA |
1673 | } |
1674 | ||
6432734d UW |
1675 | /* Records the thread's register state for the corefile note |
1676 | section. */ | |
1677 | ||
c21f37a8 | 1678 | static void |
6432734d UW |
1679 | linux_collect_thread_registers (const struct regcache *regcache, |
1680 | ptid_t ptid, bfd *obfd, | |
c21f37a8 SM |
1681 | gdb::unique_xmalloc_ptr<char> ¬e_data, |
1682 | int *note_size, | |
2ea28649 | 1683 | enum gdb_signal stop_signal) |
6432734d | 1684 | { |
ac7936df | 1685 | struct gdbarch *gdbarch = regcache->arch (); |
6432734d UW |
1686 | |
1687 | /* For remote targets the LWP may not be available, so use the TID. */ | |
c21f37a8 SM |
1688 | long lwp = ptid.lwp (); |
1689 | if (lwp == 0) | |
1690 | lwp = ptid.tid (); | |
1691 | ||
1692 | linux_collect_regset_section_cb_data data (gdbarch, regcache, obfd, note_data, | |
1693 | note_size, lwp, stop_signal); | |
5aa82d05 AA |
1694 | |
1695 | gdbarch_iterate_over_regset_sections (gdbarch, | |
1696 | linux_collect_regset_section_cb, | |
1697 | &data, regcache); | |
6432734d UW |
1698 | } |
1699 | ||
2989a365 | 1700 | /* Fetch the siginfo data for the specified thread, if it exists. If |
9f584b37 TT |
1701 | there is no data, or we could not read it, return an empty |
1702 | buffer. */ | |
1703 | ||
1704 | static gdb::byte_vector | |
1705 | linux_get_siginfo_data (thread_info *thread, struct gdbarch *gdbarch) | |
9015683b TT |
1706 | { |
1707 | struct type *siginfo_type; | |
9015683b | 1708 | LONGEST bytes_read; |
9015683b TT |
1709 | |
1710 | if (!gdbarch_get_siginfo_type_p (gdbarch)) | |
9f584b37 TT |
1711 | return gdb::byte_vector (); |
1712 | ||
41792d68 PA |
1713 | scoped_restore_current_thread save_current_thread; |
1714 | switch_to_thread (thread); | |
2989a365 | 1715 | |
9015683b TT |
1716 | siginfo_type = gdbarch_get_siginfo_type (gdbarch); |
1717 | ||
9f584b37 | 1718 | gdb::byte_vector buf (TYPE_LENGTH (siginfo_type)); |
9015683b | 1719 | |
8b88a78e | 1720 | bytes_read = target_read (current_top_target (), TARGET_OBJECT_SIGNAL_INFO, NULL, |
9f584b37 TT |
1721 | buf.data (), 0, TYPE_LENGTH (siginfo_type)); |
1722 | if (bytes_read != TYPE_LENGTH (siginfo_type)) | |
1723 | buf.clear (); | |
9015683b TT |
1724 | |
1725 | return buf; | |
1726 | } | |
1727 | ||
6432734d UW |
1728 | struct linux_corefile_thread_data |
1729 | { | |
c21f37a8 SM |
1730 | linux_corefile_thread_data (struct gdbarch *gdbarch, bfd *obfd, |
1731 | gdb::unique_xmalloc_ptr<char> ¬e_data, | |
1732 | int *note_size, gdb_signal stop_signal) | |
1733 | : gdbarch (gdbarch), obfd (obfd), note_data (note_data), | |
1734 | note_size (note_size), stop_signal (stop_signal) | |
1735 | {} | |
1736 | ||
6432734d | 1737 | struct gdbarch *gdbarch; |
6432734d | 1738 | bfd *obfd; |
c21f37a8 | 1739 | gdb::unique_xmalloc_ptr<char> ¬e_data; |
6432734d | 1740 | int *note_size; |
2ea28649 | 1741 | enum gdb_signal stop_signal; |
6432734d UW |
1742 | }; |
1743 | ||
050c224b PA |
1744 | /* Records the thread's register state for the corefile note |
1745 | section. */ | |
6432734d | 1746 | |
050c224b PA |
1747 | static void |
1748 | linux_corefile_thread (struct thread_info *info, | |
1749 | struct linux_corefile_thread_data *args) | |
6432734d | 1750 | { |
050c224b | 1751 | struct regcache *regcache; |
050c224b | 1752 | |
5b6d1e4f PA |
1753 | regcache = get_thread_arch_regcache (info->inf->process_target (), |
1754 | info->ptid, args->gdbarch); | |
050c224b | 1755 | |
050c224b | 1756 | target_fetch_registers (regcache, -1); |
9f584b37 | 1757 | gdb::byte_vector siginfo_data = linux_get_siginfo_data (info, args->gdbarch); |
050c224b | 1758 | |
c21f37a8 SM |
1759 | linux_collect_thread_registers (regcache, info->ptid, args->obfd, |
1760 | args->note_data, args->note_size, | |
1761 | args->stop_signal); | |
050c224b PA |
1762 | |
1763 | /* Don't return anything if we got no register information above, | |
1764 | such a core file is useless. */ | |
1765 | if (args->note_data != NULL) | |
c21f37a8 SM |
1766 | { |
1767 | if (!siginfo_data.empty ()) | |
1768 | args->note_data.reset (elfcore_write_note (args->obfd, | |
1769 | args->note_data.release (), | |
1770 | args->note_size, | |
1771 | "CORE", NT_SIGINFO, | |
1772 | siginfo_data.data (), | |
1773 | siginfo_data.size ())); | |
1774 | } | |
6432734d UW |
1775 | } |
1776 | ||
b3ac9c77 SDJ |
1777 | /* Fill the PRPSINFO structure with information about the process being |
1778 | debugged. Returns 1 in case of success, 0 for failures. Please note that | |
1779 | even if the structure cannot be entirely filled (e.g., GDB was unable to | |
1780 | gather information about the process UID/GID), this function will still | |
1781 | return 1 since some information was already recorded. It will only return | |
1782 | 0 iff nothing can be gathered. */ | |
1783 | ||
1784 | static int | |
1785 | linux_fill_prpsinfo (struct elf_internal_linux_prpsinfo *p) | |
1786 | { | |
1787 | /* The filename which we will use to obtain some info about the process. | |
1788 | We will basically use this to store the `/proc/PID/FILENAME' file. */ | |
1789 | char filename[100]; | |
b3ac9c77 SDJ |
1790 | /* The basename of the executable. */ |
1791 | const char *basename; | |
cbaaa0ca | 1792 | const char *infargs; |
b3ac9c77 SDJ |
1793 | /* Temporary buffer. */ |
1794 | char *tmpstr; | |
1795 | /* The valid states of a process, according to the Linux kernel. */ | |
1796 | const char valid_states[] = "RSDTZW"; | |
1797 | /* The program state. */ | |
1798 | const char *prog_state; | |
1799 | /* The state of the process. */ | |
1800 | char pr_sname; | |
1801 | /* The PID of the program which generated the corefile. */ | |
1802 | pid_t pid; | |
1803 | /* Process flags. */ | |
1804 | unsigned int pr_flag; | |
1805 | /* Process nice value. */ | |
1806 | long pr_nice; | |
1807 | /* The number of fields read by `sscanf'. */ | |
1808 | int n_fields = 0; | |
b3ac9c77 SDJ |
1809 | |
1810 | gdb_assert (p != NULL); | |
1811 | ||
1812 | /* Obtaining PID and filename. */ | |
e99b03dc | 1813 | pid = inferior_ptid.pid (); |
b3ac9c77 | 1814 | xsnprintf (filename, sizeof (filename), "/proc/%d/cmdline", (int) pid); |
87028b87 TT |
1815 | /* The full name of the program which generated the corefile. */ |
1816 | gdb::unique_xmalloc_ptr<char> fname | |
1817 | = target_fileio_read_stralloc (NULL, filename); | |
b3ac9c77 | 1818 | |
87028b87 | 1819 | if (fname == NULL || fname.get ()[0] == '\0') |
b3ac9c77 SDJ |
1820 | { |
1821 | /* No program name was read, so we won't be able to retrieve more | |
1822 | information about the process. */ | |
b3ac9c77 SDJ |
1823 | return 0; |
1824 | } | |
1825 | ||
b3ac9c77 SDJ |
1826 | memset (p, 0, sizeof (*p)); |
1827 | ||
1828 | /* Defining the PID. */ | |
1829 | p->pr_pid = pid; | |
1830 | ||
1831 | /* Copying the program name. Only the basename matters. */ | |
87028b87 | 1832 | basename = lbasename (fname.get ()); |
f67210ff | 1833 | strncpy (p->pr_fname, basename, sizeof (p->pr_fname) - 1); |
b3ac9c77 SDJ |
1834 | p->pr_fname[sizeof (p->pr_fname) - 1] = '\0'; |
1835 | ||
1836 | infargs = get_inferior_args (); | |
1837 | ||
87028b87 TT |
1838 | /* The arguments of the program. */ |
1839 | std::string psargs = fname.get (); | |
b3ac9c77 | 1840 | if (infargs != NULL) |
87028b87 | 1841 | psargs = psargs + " " + infargs; |
b3ac9c77 | 1842 | |
f67210ff | 1843 | strncpy (p->pr_psargs, psargs.c_str (), sizeof (p->pr_psargs) - 1); |
b3ac9c77 SDJ |
1844 | p->pr_psargs[sizeof (p->pr_psargs) - 1] = '\0'; |
1845 | ||
1846 | xsnprintf (filename, sizeof (filename), "/proc/%d/stat", (int) pid); | |
87028b87 TT |
1847 | /* The contents of `/proc/PID/stat'. */ |
1848 | gdb::unique_xmalloc_ptr<char> proc_stat_contents | |
1849 | = target_fileio_read_stralloc (NULL, filename); | |
1850 | char *proc_stat = proc_stat_contents.get (); | |
b3ac9c77 SDJ |
1851 | |
1852 | if (proc_stat == NULL || *proc_stat == '\0') | |
1853 | { | |
1854 | /* Despite being unable to read more information about the | |
1855 | process, we return 1 here because at least we have its | |
1856 | command line, PID and arguments. */ | |
b3ac9c77 SDJ |
1857 | return 1; |
1858 | } | |
1859 | ||
1860 | /* Ok, we have the stats. It's time to do a little parsing of the | |
1861 | contents of the buffer, so that we end up reading what we want. | |
1862 | ||
1863 | The following parsing mechanism is strongly based on the | |
1864 | information generated by the `fs/proc/array.c' file, present in | |
1865 | the Linux kernel tree. More details about how the information is | |
1866 | displayed can be obtained by seeing the manpage of proc(5), | |
1867 | specifically under the entry of `/proc/[pid]/stat'. */ | |
1868 | ||
1869 | /* Getting rid of the PID, since we already have it. */ | |
1870 | while (isdigit (*proc_stat)) | |
1871 | ++proc_stat; | |
1872 | ||
1873 | proc_stat = skip_spaces (proc_stat); | |
1874 | ||
184cd072 JK |
1875 | /* ps command also relies on no trailing fields ever contain ')'. */ |
1876 | proc_stat = strrchr (proc_stat, ')'); | |
1877 | if (proc_stat == NULL) | |
87028b87 | 1878 | return 1; |
184cd072 | 1879 | proc_stat++; |
b3ac9c77 SDJ |
1880 | |
1881 | proc_stat = skip_spaces (proc_stat); | |
1882 | ||
1883 | n_fields = sscanf (proc_stat, | |
1884 | "%c" /* Process state. */ | |
1885 | "%d%d%d" /* Parent PID, group ID, session ID. */ | |
1886 | "%*d%*d" /* tty_nr, tpgid (not used). */ | |
1887 | "%u" /* Flags. */ | |
1888 | "%*s%*s%*s%*s" /* minflt, cminflt, majflt, | |
1889 | cmajflt (not used). */ | |
1890 | "%*s%*s%*s%*s" /* utime, stime, cutime, | |
1891 | cstime (not used). */ | |
1892 | "%*s" /* Priority (not used). */ | |
1893 | "%ld", /* Nice. */ | |
1894 | &pr_sname, | |
1895 | &p->pr_ppid, &p->pr_pgrp, &p->pr_sid, | |
1896 | &pr_flag, | |
1897 | &pr_nice); | |
1898 | ||
1899 | if (n_fields != 6) | |
1900 | { | |
1901 | /* Again, we couldn't read the complementary information about | |
1902 | the process state. However, we already have minimal | |
1903 | information, so we just return 1 here. */ | |
b3ac9c77 SDJ |
1904 | return 1; |
1905 | } | |
1906 | ||
1907 | /* Filling the structure fields. */ | |
1908 | prog_state = strchr (valid_states, pr_sname); | |
1909 | if (prog_state != NULL) | |
1910 | p->pr_state = prog_state - valid_states; | |
1911 | else | |
1912 | { | |
1913 | /* Zero means "Running". */ | |
1914 | p->pr_state = 0; | |
1915 | } | |
1916 | ||
1917 | p->pr_sname = p->pr_state > 5 ? '.' : pr_sname; | |
1918 | p->pr_zomb = p->pr_sname == 'Z'; | |
1919 | p->pr_nice = pr_nice; | |
1920 | p->pr_flag = pr_flag; | |
1921 | ||
1922 | /* Finally, obtaining the UID and GID. For that, we read and parse the | |
1923 | contents of the `/proc/PID/status' file. */ | |
1924 | xsnprintf (filename, sizeof (filename), "/proc/%d/status", (int) pid); | |
87028b87 TT |
1925 | /* The contents of `/proc/PID/status'. */ |
1926 | gdb::unique_xmalloc_ptr<char> proc_status_contents | |
1927 | = target_fileio_read_stralloc (NULL, filename); | |
1928 | char *proc_status = proc_status_contents.get (); | |
b3ac9c77 SDJ |
1929 | |
1930 | if (proc_status == NULL || *proc_status == '\0') | |
1931 | { | |
1932 | /* Returning 1 since we already have a bunch of information. */ | |
b3ac9c77 SDJ |
1933 | return 1; |
1934 | } | |
1935 | ||
1936 | /* Extracting the UID. */ | |
1937 | tmpstr = strstr (proc_status, "Uid:"); | |
1938 | if (tmpstr != NULL) | |
1939 | { | |
1940 | /* Advancing the pointer to the beginning of the UID. */ | |
1941 | tmpstr += sizeof ("Uid:"); | |
1942 | while (*tmpstr != '\0' && !isdigit (*tmpstr)) | |
1943 | ++tmpstr; | |
1944 | ||
1945 | if (isdigit (*tmpstr)) | |
1946 | p->pr_uid = strtol (tmpstr, &tmpstr, 10); | |
1947 | } | |
1948 | ||
1949 | /* Extracting the GID. */ | |
1950 | tmpstr = strstr (proc_status, "Gid:"); | |
1951 | if (tmpstr != NULL) | |
1952 | { | |
1953 | /* Advancing the pointer to the beginning of the GID. */ | |
1954 | tmpstr += sizeof ("Gid:"); | |
1955 | while (*tmpstr != '\0' && !isdigit (*tmpstr)) | |
1956 | ++tmpstr; | |
1957 | ||
1958 | if (isdigit (*tmpstr)) | |
1959 | p->pr_gid = strtol (tmpstr, &tmpstr, 10); | |
1960 | } | |
1961 | ||
b3ac9c77 SDJ |
1962 | return 1; |
1963 | } | |
1964 | ||
8df01799 PA |
1965 | /* Find the signalled thread. In case there's more than one signalled |
1966 | thread, prefer the current thread, if it is signalled. If no | |
1967 | thread was signalled, default to the current thread, unless it has | |
1968 | exited, in which case return NULL. */ | |
1969 | ||
1970 | static thread_info * | |
1971 | find_signalled_thread () | |
1972 | { | |
1973 | thread_info *curr_thr = inferior_thread (); | |
1974 | if (curr_thr->state != THREAD_EXITED | |
1975 | && curr_thr->suspend.stop_signal != GDB_SIGNAL_0) | |
1976 | return curr_thr; | |
1977 | ||
1978 | for (thread_info *thr : current_inferior ()->non_exited_threads ()) | |
1979 | if (thr->suspend.stop_signal != GDB_SIGNAL_0) | |
1980 | return thr; | |
1981 | ||
1982 | /* Default to the current thread, unless it has exited. */ | |
1983 | if (curr_thr->state != THREAD_EXITED) | |
1984 | return curr_thr; | |
1985 | ||
1986 | return nullptr; | |
1987 | } | |
1988 | ||
f968fe80 AA |
1989 | /* Build the note section for a corefile, and return it in a malloc |
1990 | buffer. */ | |
6432734d | 1991 | |
c21f37a8 | 1992 | static gdb::unique_xmalloc_ptr<char> |
f968fe80 | 1993 | linux_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size) |
6432734d | 1994 | { |
b3ac9c77 | 1995 | struct elf_internal_linux_prpsinfo prpsinfo; |
c21f37a8 | 1996 | gdb::unique_xmalloc_ptr<char> note_data; |
6432734d | 1997 | |
f968fe80 AA |
1998 | if (! gdbarch_iterate_over_regset_sections_p (gdbarch)) |
1999 | return NULL; | |
2000 | ||
b3ac9c77 | 2001 | if (linux_fill_prpsinfo (&prpsinfo)) |
6432734d | 2002 | { |
fe220226 | 2003 | if (gdbarch_ptr_bit (gdbarch) == 64) |
c21f37a8 SM |
2004 | note_data.reset (elfcore_write_linux_prpsinfo64 (obfd, |
2005 | note_data.release (), | |
2006 | note_size, &prpsinfo)); | |
b3ac9c77 | 2007 | else |
c21f37a8 SM |
2008 | note_data.reset (elfcore_write_linux_prpsinfo32 (obfd, |
2009 | note_data.release (), | |
2010 | note_size, &prpsinfo)); | |
6432734d UW |
2011 | } |
2012 | ||
2013 | /* Thread register information. */ | |
a70b8144 | 2014 | try |
22fd09ae JK |
2015 | { |
2016 | update_thread_list (); | |
2017 | } | |
230d2906 | 2018 | catch (const gdb_exception_error &e) |
492d29ea PA |
2019 | { |
2020 | exception_print (gdb_stderr, e); | |
2021 | } | |
492d29ea | 2022 | |
050c224b | 2023 | /* Like the kernel, prefer dumping the signalled thread first. |
8df01799 PA |
2024 | "First thread" is what tools use to infer the signalled |
2025 | thread. */ | |
2026 | thread_info *signalled_thr = find_signalled_thread (); | |
c21f37a8 | 2027 | gdb_signal stop_signal; |
8df01799 | 2028 | if (signalled_thr != nullptr) |
c21f37a8 | 2029 | stop_signal = signalled_thr->suspend.stop_signal; |
8df01799 | 2030 | else |
c21f37a8 SM |
2031 | stop_signal = GDB_SIGNAL_0; |
2032 | ||
2033 | linux_corefile_thread_data thread_args (gdbarch, obfd, note_data, note_size, | |
2034 | stop_signal); | |
050c224b | 2035 | |
8df01799 PA |
2036 | if (signalled_thr != nullptr) |
2037 | linux_corefile_thread (signalled_thr, &thread_args); | |
08036331 | 2038 | for (thread_info *thr : current_inferior ()->non_exited_threads ()) |
050c224b PA |
2039 | { |
2040 | if (thr == signalled_thr) | |
2041 | continue; | |
050c224b PA |
2042 | |
2043 | linux_corefile_thread (thr, &thread_args); | |
2044 | } | |
2045 | ||
6432734d UW |
2046 | if (!note_data) |
2047 | return NULL; | |
2048 | ||
2049 | /* Auxillary vector. */ | |
9018be22 | 2050 | gdb::optional<gdb::byte_vector> auxv = |
8b88a78e | 2051 | target_read_alloc (current_top_target (), TARGET_OBJECT_AUXV, NULL); |
9018be22 | 2052 | if (auxv && !auxv->empty ()) |
6432734d | 2053 | { |
c21f37a8 SM |
2054 | note_data.reset (elfcore_write_note (obfd, note_data.release (), |
2055 | note_size, "CORE", NT_AUXV, | |
2056 | auxv->data (), auxv->size ())); | |
6432734d UW |
2057 | |
2058 | if (!note_data) | |
2059 | return NULL; | |
2060 | } | |
2061 | ||
451b7c33 | 2062 | /* File mappings. */ |
c21f37a8 | 2063 | linux_make_mappings_corefile_notes (gdbarch, obfd, note_data, note_size); |
451b7c33 | 2064 | |
6432734d UW |
2065 | return note_data; |
2066 | } | |
2067 | ||
eb14d406 SDJ |
2068 | /* Implementation of `gdbarch_gdb_signal_from_target', as defined in |
2069 | gdbarch.h. This function is not static because it is exported to | |
2070 | other -tdep files. */ | |
2071 | ||
2072 | enum gdb_signal | |
2073 | linux_gdb_signal_from_target (struct gdbarch *gdbarch, int signal) | |
2074 | { | |
2075 | switch (signal) | |
2076 | { | |
2077 | case 0: | |
2078 | return GDB_SIGNAL_0; | |
2079 | ||
2080 | case LINUX_SIGHUP: | |
2081 | return GDB_SIGNAL_HUP; | |
2082 | ||
2083 | case LINUX_SIGINT: | |
2084 | return GDB_SIGNAL_INT; | |
2085 | ||
2086 | case LINUX_SIGQUIT: | |
2087 | return GDB_SIGNAL_QUIT; | |
2088 | ||
2089 | case LINUX_SIGILL: | |
2090 | return GDB_SIGNAL_ILL; | |
2091 | ||
2092 | case LINUX_SIGTRAP: | |
2093 | return GDB_SIGNAL_TRAP; | |
2094 | ||
2095 | case LINUX_SIGABRT: | |
2096 | return GDB_SIGNAL_ABRT; | |
2097 | ||
2098 | case LINUX_SIGBUS: | |
2099 | return GDB_SIGNAL_BUS; | |
2100 | ||
2101 | case LINUX_SIGFPE: | |
2102 | return GDB_SIGNAL_FPE; | |
2103 | ||
2104 | case LINUX_SIGKILL: | |
2105 | return GDB_SIGNAL_KILL; | |
2106 | ||
2107 | case LINUX_SIGUSR1: | |
2108 | return GDB_SIGNAL_USR1; | |
2109 | ||
2110 | case LINUX_SIGSEGV: | |
2111 | return GDB_SIGNAL_SEGV; | |
2112 | ||
2113 | case LINUX_SIGUSR2: | |
2114 | return GDB_SIGNAL_USR2; | |
2115 | ||
2116 | case LINUX_SIGPIPE: | |
2117 | return GDB_SIGNAL_PIPE; | |
2118 | ||
2119 | case LINUX_SIGALRM: | |
2120 | return GDB_SIGNAL_ALRM; | |
2121 | ||
2122 | case LINUX_SIGTERM: | |
2123 | return GDB_SIGNAL_TERM; | |
2124 | ||
2125 | case LINUX_SIGCHLD: | |
2126 | return GDB_SIGNAL_CHLD; | |
2127 | ||
2128 | case LINUX_SIGCONT: | |
2129 | return GDB_SIGNAL_CONT; | |
2130 | ||
2131 | case LINUX_SIGSTOP: | |
2132 | return GDB_SIGNAL_STOP; | |
2133 | ||
2134 | case LINUX_SIGTSTP: | |
2135 | return GDB_SIGNAL_TSTP; | |
2136 | ||
2137 | case LINUX_SIGTTIN: | |
2138 | return GDB_SIGNAL_TTIN; | |
2139 | ||
2140 | case LINUX_SIGTTOU: | |
2141 | return GDB_SIGNAL_TTOU; | |
2142 | ||
2143 | case LINUX_SIGURG: | |
2144 | return GDB_SIGNAL_URG; | |
2145 | ||
2146 | case LINUX_SIGXCPU: | |
2147 | return GDB_SIGNAL_XCPU; | |
2148 | ||
2149 | case LINUX_SIGXFSZ: | |
2150 | return GDB_SIGNAL_XFSZ; | |
2151 | ||
2152 | case LINUX_SIGVTALRM: | |
2153 | return GDB_SIGNAL_VTALRM; | |
2154 | ||
2155 | case LINUX_SIGPROF: | |
2156 | return GDB_SIGNAL_PROF; | |
2157 | ||
2158 | case LINUX_SIGWINCH: | |
2159 | return GDB_SIGNAL_WINCH; | |
2160 | ||
2161 | /* No way to differentiate between SIGIO and SIGPOLL. | |
2162 | Therefore, we just handle the first one. */ | |
2163 | case LINUX_SIGIO: | |
2164 | return GDB_SIGNAL_IO; | |
2165 | ||
2166 | case LINUX_SIGPWR: | |
2167 | return GDB_SIGNAL_PWR; | |
2168 | ||
2169 | case LINUX_SIGSYS: | |
2170 | return GDB_SIGNAL_SYS; | |
2171 | ||
2172 | /* SIGRTMIN and SIGRTMAX are not continuous in <gdb/signals.def>, | |
2173 | therefore we have to handle them here. */ | |
2174 | case LINUX_SIGRTMIN: | |
2175 | return GDB_SIGNAL_REALTIME_32; | |
2176 | ||
2177 | case LINUX_SIGRTMAX: | |
2178 | return GDB_SIGNAL_REALTIME_64; | |
2179 | } | |
2180 | ||
2181 | if (signal >= LINUX_SIGRTMIN + 1 && signal <= LINUX_SIGRTMAX - 1) | |
2182 | { | |
2183 | int offset = signal - LINUX_SIGRTMIN + 1; | |
2184 | ||
2185 | return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_33 + offset); | |
2186 | } | |
2187 | ||
2188 | return GDB_SIGNAL_UNKNOWN; | |
2189 | } | |
2190 | ||
2191 | /* Implementation of `gdbarch_gdb_signal_to_target', as defined in | |
2192 | gdbarch.h. This function is not static because it is exported to | |
2193 | other -tdep files. */ | |
2194 | ||
2195 | int | |
2196 | linux_gdb_signal_to_target (struct gdbarch *gdbarch, | |
2197 | enum gdb_signal signal) | |
2198 | { | |
2199 | switch (signal) | |
2200 | { | |
2201 | case GDB_SIGNAL_0: | |
2202 | return 0; | |
2203 | ||
2204 | case GDB_SIGNAL_HUP: | |
2205 | return LINUX_SIGHUP; | |
2206 | ||
2207 | case GDB_SIGNAL_INT: | |
2208 | return LINUX_SIGINT; | |
2209 | ||
2210 | case GDB_SIGNAL_QUIT: | |
2211 | return LINUX_SIGQUIT; | |
2212 | ||
2213 | case GDB_SIGNAL_ILL: | |
2214 | return LINUX_SIGILL; | |
2215 | ||
2216 | case GDB_SIGNAL_TRAP: | |
2217 | return LINUX_SIGTRAP; | |
2218 | ||
2219 | case GDB_SIGNAL_ABRT: | |
2220 | return LINUX_SIGABRT; | |
2221 | ||
2222 | case GDB_SIGNAL_FPE: | |
2223 | return LINUX_SIGFPE; | |
2224 | ||
2225 | case GDB_SIGNAL_KILL: | |
2226 | return LINUX_SIGKILL; | |
2227 | ||
2228 | case GDB_SIGNAL_BUS: | |
2229 | return LINUX_SIGBUS; | |
2230 | ||
2231 | case GDB_SIGNAL_SEGV: | |
2232 | return LINUX_SIGSEGV; | |
2233 | ||
2234 | case GDB_SIGNAL_SYS: | |
2235 | return LINUX_SIGSYS; | |
2236 | ||
2237 | case GDB_SIGNAL_PIPE: | |
2238 | return LINUX_SIGPIPE; | |
2239 | ||
2240 | case GDB_SIGNAL_ALRM: | |
2241 | return LINUX_SIGALRM; | |
2242 | ||
2243 | case GDB_SIGNAL_TERM: | |
2244 | return LINUX_SIGTERM; | |
2245 | ||
2246 | case GDB_SIGNAL_URG: | |
2247 | return LINUX_SIGURG; | |
2248 | ||
2249 | case GDB_SIGNAL_STOP: | |
2250 | return LINUX_SIGSTOP; | |
2251 | ||
2252 | case GDB_SIGNAL_TSTP: | |
2253 | return LINUX_SIGTSTP; | |
2254 | ||
2255 | case GDB_SIGNAL_CONT: | |
2256 | return LINUX_SIGCONT; | |
2257 | ||
2258 | case GDB_SIGNAL_CHLD: | |
2259 | return LINUX_SIGCHLD; | |
2260 | ||
2261 | case GDB_SIGNAL_TTIN: | |
2262 | return LINUX_SIGTTIN; | |
2263 | ||
2264 | case GDB_SIGNAL_TTOU: | |
2265 | return LINUX_SIGTTOU; | |
2266 | ||
2267 | case GDB_SIGNAL_IO: | |
2268 | return LINUX_SIGIO; | |
2269 | ||
2270 | case GDB_SIGNAL_XCPU: | |
2271 | return LINUX_SIGXCPU; | |
2272 | ||
2273 | case GDB_SIGNAL_XFSZ: | |
2274 | return LINUX_SIGXFSZ; | |
2275 | ||
2276 | case GDB_SIGNAL_VTALRM: | |
2277 | return LINUX_SIGVTALRM; | |
2278 | ||
2279 | case GDB_SIGNAL_PROF: | |
2280 | return LINUX_SIGPROF; | |
2281 | ||
2282 | case GDB_SIGNAL_WINCH: | |
2283 | return LINUX_SIGWINCH; | |
2284 | ||
2285 | case GDB_SIGNAL_USR1: | |
2286 | return LINUX_SIGUSR1; | |
2287 | ||
2288 | case GDB_SIGNAL_USR2: | |
2289 | return LINUX_SIGUSR2; | |
2290 | ||
2291 | case GDB_SIGNAL_PWR: | |
2292 | return LINUX_SIGPWR; | |
2293 | ||
2294 | case GDB_SIGNAL_POLL: | |
2295 | return LINUX_SIGPOLL; | |
2296 | ||
2297 | /* GDB_SIGNAL_REALTIME_32 is not continuous in <gdb/signals.def>, | |
2298 | therefore we have to handle it here. */ | |
2299 | case GDB_SIGNAL_REALTIME_32: | |
2300 | return LINUX_SIGRTMIN; | |
2301 | ||
2302 | /* Same comment applies to _64. */ | |
2303 | case GDB_SIGNAL_REALTIME_64: | |
2304 | return LINUX_SIGRTMAX; | |
2305 | } | |
2306 | ||
2307 | /* GDB_SIGNAL_REALTIME_33 to _64 are continuous. */ | |
2308 | if (signal >= GDB_SIGNAL_REALTIME_33 | |
2309 | && signal <= GDB_SIGNAL_REALTIME_63) | |
2310 | { | |
2311 | int offset = signal - GDB_SIGNAL_REALTIME_33; | |
2312 | ||
2313 | return LINUX_SIGRTMIN + 1 + offset; | |
2314 | } | |
2315 | ||
2316 | return -1; | |
2317 | } | |
2318 | ||
cdfa0b0a PA |
2319 | /* Helper for linux_vsyscall_range that does the real work of finding |
2320 | the vsyscall's address range. */ | |
3437254d PA |
2321 | |
2322 | static int | |
cdfa0b0a | 2323 | linux_vsyscall_range_raw (struct gdbarch *gdbarch, struct mem_range *range) |
3437254d | 2324 | { |
95e94c3f PA |
2325 | char filename[100]; |
2326 | long pid; | |
95e94c3f | 2327 | |
8b88a78e | 2328 | if (target_auxv_search (current_top_target (), AT_SYSINFO_EHDR, &range->start) <= 0) |
95e94c3f PA |
2329 | return 0; |
2330 | ||
6bb90213 PA |
2331 | /* It doesn't make sense to access the host's /proc when debugging a |
2332 | core file. Instead, look for the PT_LOAD segment that matches | |
2333 | the vDSO. */ | |
55f6301a | 2334 | if (!target_has_execution ()) |
6bb90213 | 2335 | { |
6bb90213 PA |
2336 | long phdrs_size; |
2337 | int num_phdrs, i; | |
2338 | ||
2339 | phdrs_size = bfd_get_elf_phdr_upper_bound (core_bfd); | |
2340 | if (phdrs_size == -1) | |
2341 | return 0; | |
2342 | ||
31aceee8 TV |
2343 | gdb::unique_xmalloc_ptr<Elf_Internal_Phdr> |
2344 | phdrs ((Elf_Internal_Phdr *) xmalloc (phdrs_size)); | |
2345 | num_phdrs = bfd_get_elf_phdrs (core_bfd, phdrs.get ()); | |
6bb90213 PA |
2346 | if (num_phdrs == -1) |
2347 | return 0; | |
2348 | ||
2349 | for (i = 0; i < num_phdrs; i++) | |
31aceee8 TV |
2350 | if (phdrs.get ()[i].p_type == PT_LOAD |
2351 | && phdrs.get ()[i].p_vaddr == range->start) | |
6bb90213 | 2352 | { |
31aceee8 | 2353 | range->length = phdrs.get ()[i].p_memsz; |
6bb90213 PA |
2354 | return 1; |
2355 | } | |
2356 | ||
2357 | return 0; | |
2358 | } | |
2359 | ||
95e94c3f PA |
2360 | /* We need to know the real target PID to access /proc. */ |
2361 | if (current_inferior ()->fake_pid_p) | |
2362 | return 0; | |
2363 | ||
95e94c3f | 2364 | pid = current_inferior ()->pid; |
3437254d | 2365 | |
95e94c3f PA |
2366 | /* Note that reading /proc/PID/task/PID/maps (1) is much faster than |
2367 | reading /proc/PID/maps (2). The later identifies thread stacks | |
2368 | in the output, which requires scanning every thread in the thread | |
2369 | group to check whether a VMA is actually a thread's stack. With | |
2370 | Linux 4.4 on an Intel i7-4810MQ @ 2.80GHz, with an inferior with | |
2371 | a few thousand threads, (1) takes a few miliseconds, while (2) | |
2372 | takes several seconds. Also note that "smaps", what we read for | |
2373 | determining core dump mappings, is even slower than "maps". */ | |
2374 | xsnprintf (filename, sizeof filename, "/proc/%ld/task/%ld/maps", pid, pid); | |
87028b87 TT |
2375 | gdb::unique_xmalloc_ptr<char> data |
2376 | = target_fileio_read_stralloc (NULL, filename); | |
95e94c3f PA |
2377 | if (data != NULL) |
2378 | { | |
95e94c3f PA |
2379 | char *line; |
2380 | char *saveptr = NULL; | |
2381 | ||
87028b87 | 2382 | for (line = strtok_r (data.get (), "\n", &saveptr); |
95e94c3f PA |
2383 | line != NULL; |
2384 | line = strtok_r (NULL, "\n", &saveptr)) | |
2385 | { | |
2386 | ULONGEST addr, endaddr; | |
2387 | const char *p = line; | |
2388 | ||
2389 | addr = strtoulst (p, &p, 16); | |
2390 | if (addr == range->start) | |
2391 | { | |
2392 | if (*p == '-') | |
2393 | p++; | |
2394 | endaddr = strtoulst (p, &p, 16); | |
2395 | range->length = endaddr - addr; | |
95e94c3f PA |
2396 | return 1; |
2397 | } | |
2398 | } | |
95e94c3f PA |
2399 | } |
2400 | else | |
2401 | warning (_("unable to open /proc file '%s'"), filename); | |
2402 | ||
2403 | return 0; | |
3437254d PA |
2404 | } |
2405 | ||
cdfa0b0a PA |
2406 | /* Implementation of the "vsyscall_range" gdbarch hook. Handles |
2407 | caching, and defers the real work to linux_vsyscall_range_raw. */ | |
2408 | ||
2409 | static int | |
2410 | linux_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range) | |
2411 | { | |
94b24c74 | 2412 | struct linux_info *info = get_linux_inferior_data (current_inferior ()); |
cdfa0b0a PA |
2413 | |
2414 | if (info->vsyscall_range_p == 0) | |
2415 | { | |
2416 | if (linux_vsyscall_range_raw (gdbarch, &info->vsyscall_range)) | |
2417 | info->vsyscall_range_p = 1; | |
2418 | else | |
2419 | info->vsyscall_range_p = -1; | |
2420 | } | |
2421 | ||
2422 | if (info->vsyscall_range_p < 0) | |
2423 | return 0; | |
2424 | ||
2425 | *range = info->vsyscall_range; | |
2426 | return 1; | |
2427 | } | |
2428 | ||
3bc3cebe JK |
2429 | /* Symbols for linux_infcall_mmap's ARG_FLAGS; their Linux MAP_* system |
2430 | definitions would be dependent on compilation host. */ | |
2431 | #define GDB_MMAP_MAP_PRIVATE 0x02 /* Changes are private. */ | |
2432 | #define GDB_MMAP_MAP_ANONYMOUS 0x20 /* Don't use a file. */ | |
2433 | ||
2434 | /* See gdbarch.sh 'infcall_mmap'. */ | |
2435 | ||
2436 | static CORE_ADDR | |
2437 | linux_infcall_mmap (CORE_ADDR size, unsigned prot) | |
2438 | { | |
2439 | struct objfile *objf; | |
2440 | /* Do there still exist any Linux systems without "mmap64"? | |
2441 | "mmap" uses 64-bit off_t on x86_64 and 32-bit off_t on i386 and x32. */ | |
2442 | struct value *mmap_val = find_function_in_inferior ("mmap64", &objf); | |
2443 | struct value *addr_val; | |
08feed99 | 2444 | struct gdbarch *gdbarch = objf->arch (); |
3bc3cebe JK |
2445 | CORE_ADDR retval; |
2446 | enum | |
2447 | { | |
2a546367 | 2448 | ARG_ADDR, ARG_LENGTH, ARG_PROT, ARG_FLAGS, ARG_FD, ARG_OFFSET, ARG_LAST |
3bc3cebe | 2449 | }; |
2a546367 | 2450 | struct value *arg[ARG_LAST]; |
3bc3cebe JK |
2451 | |
2452 | arg[ARG_ADDR] = value_from_pointer (builtin_type (gdbarch)->builtin_data_ptr, | |
2453 | 0); | |
2454 | /* Assuming sizeof (unsigned long) == sizeof (size_t). */ | |
2455 | arg[ARG_LENGTH] = value_from_ulongest | |
2456 | (builtin_type (gdbarch)->builtin_unsigned_long, size); | |
2457 | gdb_assert ((prot & ~(GDB_MMAP_PROT_READ | GDB_MMAP_PROT_WRITE | |
2458 | | GDB_MMAP_PROT_EXEC)) | |
2459 | == 0); | |
2460 | arg[ARG_PROT] = value_from_longest (builtin_type (gdbarch)->builtin_int, prot); | |
2461 | arg[ARG_FLAGS] = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
2462 | GDB_MMAP_MAP_PRIVATE | |
2463 | | GDB_MMAP_MAP_ANONYMOUS); | |
2464 | arg[ARG_FD] = value_from_longest (builtin_type (gdbarch)->builtin_int, -1); | |
2465 | arg[ARG_OFFSET] = value_from_longest (builtin_type (gdbarch)->builtin_int64, | |
2466 | 0); | |
e71585ff | 2467 | addr_val = call_function_by_hand (mmap_val, NULL, arg); |
3bc3cebe JK |
2468 | retval = value_as_address (addr_val); |
2469 | if (retval == (CORE_ADDR) -1) | |
2470 | error (_("Failed inferior mmap call for %s bytes, errno is changed."), | |
2471 | pulongest (size)); | |
2472 | return retval; | |
2473 | } | |
2474 | ||
7f361056 JK |
2475 | /* See gdbarch.sh 'infcall_munmap'. */ |
2476 | ||
2477 | static void | |
2478 | linux_infcall_munmap (CORE_ADDR addr, CORE_ADDR size) | |
2479 | { | |
2480 | struct objfile *objf; | |
2481 | struct value *munmap_val = find_function_in_inferior ("munmap", &objf); | |
2482 | struct value *retval_val; | |
08feed99 | 2483 | struct gdbarch *gdbarch = objf->arch (); |
7f361056 JK |
2484 | LONGEST retval; |
2485 | enum | |
2486 | { | |
2487 | ARG_ADDR, ARG_LENGTH, ARG_LAST | |
2488 | }; | |
2489 | struct value *arg[ARG_LAST]; | |
2490 | ||
2491 | arg[ARG_ADDR] = value_from_pointer (builtin_type (gdbarch)->builtin_data_ptr, | |
2492 | addr); | |
2493 | /* Assuming sizeof (unsigned long) == sizeof (size_t). */ | |
2494 | arg[ARG_LENGTH] = value_from_ulongest | |
2495 | (builtin_type (gdbarch)->builtin_unsigned_long, size); | |
e71585ff | 2496 | retval_val = call_function_by_hand (munmap_val, NULL, arg); |
7f361056 JK |
2497 | retval = value_as_long (retval_val); |
2498 | if (retval != 0) | |
2499 | warning (_("Failed inferior munmap call at %s for %s bytes, " | |
2500 | "errno is changed."), | |
2501 | hex_string (addr), pulongest (size)); | |
2502 | } | |
2503 | ||
906d60cf PA |
2504 | /* See linux-tdep.h. */ |
2505 | ||
2506 | CORE_ADDR | |
2507 | linux_displaced_step_location (struct gdbarch *gdbarch) | |
2508 | { | |
2509 | CORE_ADDR addr; | |
2510 | int bp_len; | |
2511 | ||
2512 | /* Determine entry point from target auxiliary vector. This avoids | |
2513 | the need for symbols. Also, when debugging a stand-alone SPU | |
2514 | executable, entry_point_address () will point to an SPU | |
2515 | local-store address and is thus not usable as displaced stepping | |
2516 | location. The auxiliary vector gets us the PowerPC-side entry | |
2517 | point address instead. */ | |
8b88a78e | 2518 | if (target_auxv_search (current_top_target (), AT_ENTRY, &addr) <= 0) |
16b41842 PA |
2519 | throw_error (NOT_SUPPORTED_ERROR, |
2520 | _("Cannot find AT_ENTRY auxiliary vector entry.")); | |
906d60cf PA |
2521 | |
2522 | /* Make certain that the address points at real code, and not a | |
2523 | function descriptor. */ | |
2524 | addr = gdbarch_convert_from_func_ptr_addr (gdbarch, addr, | |
8b88a78e | 2525 | current_top_target ()); |
906d60cf PA |
2526 | |
2527 | /* Inferior calls also use the entry point as a breakpoint location. | |
2528 | We don't want displaced stepping to interfere with those | |
2529 | breakpoints, so leave space. */ | |
2530 | gdbarch_breakpoint_from_pc (gdbarch, &addr, &bp_len); | |
2531 | addr += bp_len * 2; | |
2532 | ||
2533 | return addr; | |
2534 | } | |
2535 | ||
0f83012e AH |
2536 | /* See linux-tdep.h. */ |
2537 | ||
187b041e SM |
2538 | displaced_step_prepare_status |
2539 | linux_displaced_step_prepare (gdbarch *arch, thread_info *thread, | |
2540 | CORE_ADDR &displaced_pc) | |
2541 | { | |
2542 | linux_info *per_inferior = get_linux_inferior_data (thread->inf); | |
2543 | ||
480af54c | 2544 | if (!per_inferior->disp_step_bufs.has_value ()) |
187b041e | 2545 | { |
480af54c SM |
2546 | /* Figure out the location of the buffers. They are contiguous, starting |
2547 | at DISP_STEP_BUF_ADDR. They are all of size BUF_LEN. */ | |
187b041e SM |
2548 | CORE_ADDR disp_step_buf_addr |
2549 | = linux_displaced_step_location (thread->inf->gdbarch); | |
480af54c | 2550 | int buf_len = gdbarch_max_insn_length (arch); |
187b041e | 2551 | |
480af54c SM |
2552 | linux_gdbarch_data *gdbarch_data = get_linux_gdbarch_data (arch); |
2553 | gdb_assert (gdbarch_data->num_disp_step_buffers > 0); | |
2554 | ||
2555 | std::vector<CORE_ADDR> buffers; | |
2556 | for (int i = 0; i < gdbarch_data->num_disp_step_buffers; i++) | |
2557 | buffers.push_back (disp_step_buf_addr + i * buf_len); | |
2558 | ||
2559 | per_inferior->disp_step_bufs.emplace (buffers); | |
187b041e SM |
2560 | } |
2561 | ||
480af54c | 2562 | return per_inferior->disp_step_bufs->prepare (thread, displaced_pc); |
187b041e SM |
2563 | } |
2564 | ||
2565 | /* See linux-tdep.h. */ | |
2566 | ||
2567 | displaced_step_finish_status | |
2568 | linux_displaced_step_finish (gdbarch *arch, thread_info *thread, gdb_signal sig) | |
2569 | { | |
2570 | linux_info *per_inferior = get_linux_inferior_data (thread->inf); | |
2571 | ||
480af54c | 2572 | gdb_assert (per_inferior->disp_step_bufs.has_value ()); |
187b041e | 2573 | |
480af54c | 2574 | return per_inferior->disp_step_bufs->finish (arch, thread, sig); |
187b041e SM |
2575 | } |
2576 | ||
2577 | /* See linux-tdep.h. */ | |
2578 | ||
2579 | const displaced_step_copy_insn_closure * | |
2580 | linux_displaced_step_copy_insn_closure_by_addr (inferior *inf, CORE_ADDR addr) | |
2581 | { | |
2582 | linux_info *per_inferior = linux_inferior_data.get (inf); | |
2583 | ||
2584 | if (per_inferior == nullptr | |
480af54c | 2585 | || !per_inferior->disp_step_bufs.has_value ()) |
187b041e SM |
2586 | return nullptr; |
2587 | ||
480af54c | 2588 | return per_inferior->disp_step_bufs->copy_insn_closure_by_addr (addr); |
187b041e SM |
2589 | } |
2590 | ||
2591 | /* See linux-tdep.h. */ | |
2592 | ||
2593 | void | |
2594 | linux_displaced_step_restore_all_in_ptid (inferior *parent_inf, ptid_t ptid) | |
2595 | { | |
2596 | linux_info *per_inferior = linux_inferior_data.get (parent_inf); | |
2597 | ||
2598 | if (per_inferior == nullptr | |
480af54c | 2599 | || !per_inferior->disp_step_bufs.has_value ()) |
187b041e SM |
2600 | return; |
2601 | ||
480af54c | 2602 | per_inferior->disp_step_bufs->restore_in_ptid (ptid); |
187b041e SM |
2603 | } |
2604 | ||
2605 | /* See linux-tdep.h. */ | |
2606 | ||
0f83012e AH |
2607 | CORE_ADDR |
2608 | linux_get_hwcap (struct target_ops *target) | |
2609 | { | |
2610 | CORE_ADDR field; | |
2611 | if (target_auxv_search (target, AT_HWCAP, &field) != 1) | |
2612 | return 0; | |
2613 | return field; | |
2614 | } | |
2615 | ||
2616 | /* See linux-tdep.h. */ | |
2617 | ||
2618 | CORE_ADDR | |
2619 | linux_get_hwcap2 (struct target_ops *target) | |
2620 | { | |
2621 | CORE_ADDR field; | |
2622 | if (target_auxv_search (target, AT_HWCAP2, &field) != 1) | |
2623 | return 0; | |
2624 | return field; | |
2625 | } | |
2626 | ||
df8411da SDJ |
2627 | /* Display whether the gcore command is using the |
2628 | /proc/PID/coredump_filter file. */ | |
2629 | ||
2630 | static void | |
2631 | show_use_coredump_filter (struct ui_file *file, int from_tty, | |
2632 | struct cmd_list_element *c, const char *value) | |
2633 | { | |
2634 | fprintf_filtered (file, _("Use of /proc/PID/coredump_filter file to generate" | |
2635 | " corefiles is %s.\n"), value); | |
2636 | } | |
2637 | ||
afa840dc SL |
2638 | /* Display whether the gcore command is dumping mappings marked with |
2639 | the VM_DONTDUMP flag. */ | |
2640 | ||
2641 | static void | |
2642 | show_dump_excluded_mappings (struct ui_file *file, int from_tty, | |
2643 | struct cmd_list_element *c, const char *value) | |
2644 | { | |
2645 | fprintf_filtered (file, _("Dumping of mappings marked with the VM_DONTDUMP" | |
2646 | " flag is %s.\n"), value); | |
2647 | } | |
2648 | ||
a5ee0f0c | 2649 | /* To be called from the various GDB_OSABI_LINUX handlers for the |
480af54c SM |
2650 | various GNU/Linux architectures and machine types. |
2651 | ||
2652 | NUM_DISP_STEP_BUFFERS is the number of displaced step buffers to use. If 0, | |
2653 | displaced stepping is not supported. */ | |
a5ee0f0c PA |
2654 | |
2655 | void | |
187b041e | 2656 | linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch, |
480af54c | 2657 | int num_disp_step_buffers) |
a5ee0f0c | 2658 | { |
480af54c | 2659 | if (num_disp_step_buffers > 0) |
187b041e | 2660 | { |
480af54c SM |
2661 | linux_gdbarch_data *gdbarch_data = get_linux_gdbarch_data (gdbarch); |
2662 | gdbarch_data->num_disp_step_buffers = num_disp_step_buffers; | |
2663 | ||
2664 | set_gdbarch_displaced_step_prepare (gdbarch, | |
2665 | linux_displaced_step_prepare); | |
187b041e SM |
2666 | set_gdbarch_displaced_step_finish (gdbarch, linux_displaced_step_finish); |
2667 | set_gdbarch_displaced_step_copy_insn_closure_by_addr | |
2668 | (gdbarch, linux_displaced_step_copy_insn_closure_by_addr); | |
2669 | set_gdbarch_displaced_step_restore_all_in_ptid | |
2670 | (gdbarch, linux_displaced_step_restore_all_in_ptid); | |
2671 | } | |
2672 | ||
a5ee0f0c | 2673 | set_gdbarch_core_pid_to_str (gdbarch, linux_core_pid_to_str); |
3030c96e | 2674 | set_gdbarch_info_proc (gdbarch, linux_info_proc); |
451b7c33 | 2675 | set_gdbarch_core_info_proc (gdbarch, linux_core_info_proc); |
382b69bb | 2676 | set_gdbarch_core_xfer_siginfo (gdbarch, linux_core_xfer_siginfo); |
db082f59 | 2677 | set_gdbarch_read_core_file_mappings (gdbarch, linux_read_core_file_mappings); |
35c2fab7 | 2678 | set_gdbarch_find_memory_regions (gdbarch, linux_find_memory_regions); |
f968fe80 | 2679 | set_gdbarch_make_corefile_notes (gdbarch, linux_make_corefile_notes); |
33fbcbee PA |
2680 | set_gdbarch_has_shared_address_space (gdbarch, |
2681 | linux_has_shared_address_space); | |
eb14d406 SDJ |
2682 | set_gdbarch_gdb_signal_from_target (gdbarch, |
2683 | linux_gdb_signal_from_target); | |
2684 | set_gdbarch_gdb_signal_to_target (gdbarch, | |
2685 | linux_gdb_signal_to_target); | |
3437254d | 2686 | set_gdbarch_vsyscall_range (gdbarch, linux_vsyscall_range); |
3bc3cebe | 2687 | set_gdbarch_infcall_mmap (gdbarch, linux_infcall_mmap); |
7f361056 | 2688 | set_gdbarch_infcall_munmap (gdbarch, linux_infcall_munmap); |
5cd867b4 | 2689 | set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type); |
a5ee0f0c | 2690 | } |
06253dd3 | 2691 | |
6c265988 | 2692 | void _initialize_linux_tdep (); |
06253dd3 | 2693 | void |
6c265988 | 2694 | _initialize_linux_tdep () |
06253dd3 JK |
2695 | { |
2696 | linux_gdbarch_data_handle = | |
d9655058 | 2697 | gdbarch_data_register_pre_init (init_linux_gdbarch_data); |
cdfa0b0a | 2698 | |
cdfa0b0a | 2699 | /* Observers used to invalidate the cache when needed. */ |
76727919 TT |
2700 | gdb::observers::inferior_exit.attach (invalidate_linux_cache_inf); |
2701 | gdb::observers::inferior_appeared.attach (invalidate_linux_cache_inf); | |
187b041e | 2702 | gdb::observers::inferior_execd.attach (invalidate_linux_cache_inf); |
df8411da SDJ |
2703 | |
2704 | add_setshow_boolean_cmd ("use-coredump-filter", class_files, | |
2705 | &use_coredump_filter, _("\ | |
2706 | Set whether gcore should consider /proc/PID/coredump_filter."), | |
2707 | _("\ | |
2708 | Show whether gcore should consider /proc/PID/coredump_filter."), | |
2709 | _("\ | |
2710 | Use this command to set whether gcore should consider the contents\n\ | |
2711 | of /proc/PID/coredump_filter when generating the corefile. For more information\n\ | |
2712 | about this file, refer to the manpage of core(5)."), | |
2713 | NULL, show_use_coredump_filter, | |
2714 | &setlist, &showlist); | |
afa840dc SL |
2715 | |
2716 | add_setshow_boolean_cmd ("dump-excluded-mappings", class_files, | |
2717 | &dump_excluded_mappings, _("\ | |
2718 | Set whether gcore should dump mappings marked with the VM_DONTDUMP flag."), | |
2719 | _("\ | |
2720 | Show whether gcore should dump mappings marked with the VM_DONTDUMP flag."), | |
2721 | _("\ | |
2722 | Use this command to set whether gcore should dump mappings marked with the\n\ | |
2723 | VM_DONTDUMP flag (\"dd\" in /proc/PID/smaps) when generating the corefile. For\n\ | |
2724 | more information about this file, refer to the manpage of proc(5) and core(5)."), | |
2725 | NULL, show_dump_excluded_mappings, | |
2726 | &setlist, &showlist); | |
06253dd3 | 2727 | } |