Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
5aab621b ACM |
2 | #include <dirent.h> |
3 | #include <errno.h> | |
5aab621b ACM |
4 | #include <stdlib.h> |
5 | #include <stdio.h> | |
6 | #include <string.h> | |
8859aede | 7 | #include <linux/capability.h> |
877a7a11 | 8 | #include <linux/kernel.h> |
e9814df8 | 9 | #include <linux/mman.h> |
8520a98d | 10 | #include <linux/string.h> |
2a1292cb | 11 | #include <linux/time64.h> |
5aab621b ACM |
12 | #include <sys/types.h> |
13 | #include <sys/stat.h> | |
14 | #include <sys/param.h> | |
15 | #include <fcntl.h> | |
16 | #include <unistd.h> | |
9486aa38 | 17 | #include <inttypes.h> |
b01141f4 | 18 | #include "annotate.h" |
b36f19d5 | 19 | #include "build-id.h" |
8859aede | 20 | #include "cap.h" |
fac583fd | 21 | #include "dso.h" |
fb71c86c | 22 | #include "util.h" // lsdir() |
8a6c5b26 | 23 | #include "debug.h" |
8859aede | 24 | #include "event.h" |
69d2591a | 25 | #include "machine.h" |
1101f69a | 26 | #include "map.h" |
a2928c42 | 27 | #include "symbol.h" |
d3300a3c ACM |
28 | #include "map_symbol.h" |
29 | #include "mem-events.h" | |
b1d1b094 | 30 | #include "symsrc.h" |
5aab621b | 31 | #include "strlist.h" |
e03eaa40 | 32 | #include "intlist.h" |
843ff37b | 33 | #include "namespaces.h" |
0a7e6d1b | 34 | #include "header.h" |
9a3993d4 | 35 | #include "path.h" |
3052ba56 | 36 | #include <linux/ctype.h> |
7f7c536f | 37 | #include <linux/zalloc.h> |
a2928c42 | 38 | |
a2928c42 | 39 | #include <elf.h> |
f1617b40 | 40 | #include <limits.h> |
c506c96b | 41 | #include <symbol/kallsyms.h> |
439d473b | 42 | #include <sys/utsname.h> |
2cdbc46d | 43 | |
be39db9f ACM |
44 | static int dso__load_kernel_sym(struct dso *dso, struct map *map); |
45 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map); | |
608c34de ACM |
46 | static bool symbol__is_idle(const char *name); |
47 | ||
3f067dca ACM |
48 | int vmlinux_path__nr_entries; |
49 | char **vmlinux_path; | |
439d473b | 50 | |
75be6cf4 | 51 | struct symbol_conf symbol_conf = { |
52bab886 | 52 | .nanosecs = false, |
e511db5e NK |
53 | .use_modules = true, |
54 | .try_vmlinux_path = true, | |
e511db5e | 55 | .demangle = true, |
763122ad | 56 | .demangle_kernel = false, |
e511db5e | 57 | .cumulate_callchain = true, |
2a1292cb | 58 | .time_quantum = 100 * NSEC_PER_MSEC, /* 100ms */ |
c8302367 | 59 | .show_hist_headers = true, |
e511db5e | 60 | .symfs = "", |
1e9abf8b | 61 | .event_group = true, |
d8a88dd2 | 62 | .inline_name = true, |
4968ac8f | 63 | .res_sample = 0, |
b32d133a ACM |
64 | }; |
65 | ||
ff0bd799 IR |
66 | struct map_list_node { |
67 | struct list_head node; | |
68 | struct map *map; | |
69 | }; | |
70 | ||
71 | static struct map_list_node *map_list_node__new(void) | |
72 | { | |
73 | return malloc(sizeof(struct map_list_node)); | |
74 | } | |
75 | ||
44f24cb3 JO |
76 | static enum dso_binary_type binary_type_symtab[] = { |
77 | DSO_BINARY_TYPE__KALLSYMS, | |
78 | DSO_BINARY_TYPE__GUEST_KALLSYMS, | |
79 | DSO_BINARY_TYPE__JAVA_JIT, | |
80 | DSO_BINARY_TYPE__DEBUGLINK, | |
81 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
d2396999 | 82 | DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO, |
44f24cb3 JO |
83 | DSO_BINARY_TYPE__FEDORA_DEBUGINFO, |
84 | DSO_BINARY_TYPE__UBUNTU_DEBUGINFO, | |
85 | DSO_BINARY_TYPE__BUILDID_DEBUGINFO, | |
86 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
87 | DSO_BINARY_TYPE__GUEST_KMODULE, | |
c00c48fc | 88 | DSO_BINARY_TYPE__GUEST_KMODULE_COMP, |
44f24cb3 | 89 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE, |
c00c48fc | 90 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP, |
9cd00941 | 91 | DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO, |
85afd355 | 92 | DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO, |
44f24cb3 JO |
93 | DSO_BINARY_TYPE__NOT_FOUND, |
94 | }; | |
95 | ||
028df767 | 96 | #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab) |
44f24cb3 | 97 | |
3183f8ca | 98 | static bool symbol_type__filter(char symbol_type) |
6893d4ee | 99 | { |
31877908 | 100 | symbol_type = toupper(symbol_type); |
2be732c0 | 101 | return symbol_type == 'T' || symbol_type == 'W' || symbol_type == 'D' || symbol_type == 'B'; |
6893d4ee ACM |
102 | } |
103 | ||
694bf407 AB |
104 | static int prefix_underscores_count(const char *str) |
105 | { | |
106 | const char *tail = str; | |
107 | ||
108 | while (*tail == '_') | |
109 | tail++; | |
110 | ||
111 | return tail - str; | |
112 | } | |
113 | ||
4b3a2716 MH |
114 | const char * __weak arch__normalize_symbol_name(const char *name) |
115 | { | |
116 | return name; | |
117 | } | |
118 | ||
d8040645 PC |
119 | int __weak arch__compare_symbol_names(const char *namea, const char *nameb) |
120 | { | |
121 | return strcmp(namea, nameb); | |
122 | } | |
123 | ||
124 | int __weak arch__compare_symbol_names_n(const char *namea, const char *nameb, | |
125 | unsigned int n) | |
126 | { | |
127 | return strncmp(namea, nameb, n); | |
128 | } | |
129 | ||
fb6d5942 NR |
130 | int __weak arch__choose_best_symbol(struct symbol *syma, |
131 | struct symbol *symb __maybe_unused) | |
132 | { | |
133 | /* Avoid "SyS" kernel syscall aliases */ | |
134 | if (strlen(syma->name) >= 3 && !strncmp(syma->name, "SyS", 3)) | |
135 | return SYMBOL_B; | |
136 | if (strlen(syma->name) >= 10 && !strncmp(syma->name, "compat_SyS", 10)) | |
137 | return SYMBOL_B; | |
138 | ||
139 | return SYMBOL_A; | |
140 | } | |
694bf407 AB |
141 | |
142 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
143 | { | |
144 | s64 a; | |
145 | s64 b; | |
3445432b | 146 | size_t na, nb; |
694bf407 AB |
147 | |
148 | /* Prefer a symbol with non zero length */ | |
149 | a = syma->end - syma->start; | |
150 | b = symb->end - symb->start; | |
151 | if ((b == 0) && (a > 0)) | |
152 | return SYMBOL_A; | |
153 | else if ((a == 0) && (b > 0)) | |
154 | return SYMBOL_B; | |
155 | ||
156 | /* Prefer a non weak symbol over a weak one */ | |
157 | a = syma->binding == STB_WEAK; | |
158 | b = symb->binding == STB_WEAK; | |
159 | if (b && !a) | |
160 | return SYMBOL_A; | |
161 | if (a && !b) | |
162 | return SYMBOL_B; | |
163 | ||
164 | /* Prefer a global symbol over a non global one */ | |
165 | a = syma->binding == STB_GLOBAL; | |
166 | b = symb->binding == STB_GLOBAL; | |
167 | if (a && !b) | |
168 | return SYMBOL_A; | |
169 | if (b && !a) | |
170 | return SYMBOL_B; | |
171 | ||
172 | /* Prefer a symbol with less underscores */ | |
173 | a = prefix_underscores_count(syma->name); | |
174 | b = prefix_underscores_count(symb->name); | |
175 | if (b > a) | |
176 | return SYMBOL_A; | |
177 | else if (a > b) | |
178 | return SYMBOL_B; | |
179 | ||
3445432b AH |
180 | /* Choose the symbol with the longest name */ |
181 | na = strlen(syma->name); | |
182 | nb = strlen(symb->name); | |
183 | if (na > nb) | |
694bf407 | 184 | return SYMBOL_A; |
3445432b | 185 | else if (na < nb) |
694bf407 | 186 | return SYMBOL_B; |
3445432b | 187 | |
fb6d5942 | 188 | return arch__choose_best_symbol(syma, symb); |
694bf407 AB |
189 | } |
190 | ||
7137ff50 | 191 | void symbols__fixup_duplicate(struct rb_root_cached *symbols) |
694bf407 AB |
192 | { |
193 | struct rb_node *nd; | |
194 | struct symbol *curr, *next; | |
195 | ||
c97b40e4 ACM |
196 | if (symbol_conf.allow_aliases) |
197 | return; | |
198 | ||
7137ff50 | 199 | nd = rb_first_cached(symbols); |
694bf407 AB |
200 | |
201 | while (nd) { | |
202 | curr = rb_entry(nd, struct symbol, rb_node); | |
203 | again: | |
204 | nd = rb_next(&curr->rb_node); | |
694bf407 AB |
205 | if (!nd) |
206 | break; | |
207 | ||
21ce931e | 208 | next = rb_entry(nd, struct symbol, rb_node); |
694bf407 AB |
209 | if (curr->start != next->start) |
210 | continue; | |
211 | ||
212 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
05963491 AH |
213 | if (next->type == STT_GNU_IFUNC) |
214 | curr->ifunc_alias = true; | |
7137ff50 | 215 | rb_erase_cached(&next->rb_node, symbols); |
d4f74eb8 | 216 | symbol__delete(next); |
694bf407 AB |
217 | goto again; |
218 | } else { | |
05963491 AH |
219 | if (curr->type == STT_GNU_IFUNC) |
220 | next->ifunc_alias = true; | |
694bf407 | 221 | nd = rb_next(&curr->rb_node); |
7137ff50 | 222 | rb_erase_cached(&curr->rb_node, symbols); |
d4f74eb8 | 223 | symbol__delete(curr); |
694bf407 AB |
224 | } |
225 | } | |
226 | } | |
227 | ||
8799ebce NK |
228 | /* Update zero-sized symbols using the address of the next symbol */ |
229 | void symbols__fixup_end(struct rb_root_cached *symbols, bool is_kallsyms) | |
af427bf5 | 230 | { |
7137ff50 | 231 | struct rb_node *nd, *prevnd = rb_first_cached(symbols); |
2e538c4a | 232 | struct symbol *curr, *prev; |
af427bf5 ACM |
233 | |
234 | if (prevnd == NULL) | |
235 | return; | |
236 | ||
2e538c4a ACM |
237 | curr = rb_entry(prevnd, struct symbol, rb_node); |
238 | ||
af427bf5 | 239 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
240 | prev = curr; |
241 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 242 | |
8799ebce NK |
243 | /* |
244 | * On some architecture kernel text segment start is located at | |
245 | * some low memory address, while modules are located at high | |
246 | * memory addresses (or vice versa). The gap between end of | |
247 | * kernel text segment and beginning of first module's text | |
248 | * segment is very big. Therefore do not fill this gap and do | |
249 | * not assign it to the kernel dso map (kallsyms). | |
250 | * | |
bacefe0c NK |
251 | * Also BPF code can be allocated separately from text segments |
252 | * and modules. So the last entry in a module should not fill | |
253 | * the gap too. | |
254 | * | |
8799ebce NK |
255 | * In kallsyms, it determines module symbols using '[' character |
256 | * like in: | |
257 | * ffffffffc1937000 T hdmi_driver_init [snd_hda_codec_hdmi] | |
258 | */ | |
259 | if (prev->end == prev->start) { | |
bacefe0c NK |
260 | const char *prev_mod; |
261 | const char *curr_mod; | |
262 | ||
263 | if (!is_kallsyms) { | |
264 | prev->end = curr->start; | |
265 | continue; | |
266 | } | |
267 | ||
268 | prev_mod = strchr(prev->name, '['); | |
269 | curr_mod = strchr(curr->name, '['); | |
270 | ||
8799ebce | 271 | /* Last kernel/module symbol mapped to end of page */ |
bacefe0c NK |
272 | if (!prev_mod != !curr_mod) |
273 | prev->end = roundup(prev->end + 4096, 4096); | |
274 | /* Last symbol in the previous module */ | |
275 | else if (prev_mod && strcmp(prev_mod, curr_mod)) | |
8799ebce NK |
276 | prev->end = roundup(prev->end + 4096, 4096); |
277 | else | |
278 | prev->end = curr->start; | |
279 | ||
280 | pr_debug4("%s sym:%s end:%#" PRIx64 "\n", | |
281 | __func__, prev->name, prev->end); | |
282 | } | |
af427bf5 | 283 | } |
2e538c4a ACM |
284 | |
285 | /* Last entry */ | |
286 | if (curr->end == curr->start) | |
e7ede72a | 287 | curr->end = roundup(curr->start, 4096) + 4096; |
af427bf5 ACM |
288 | } |
289 | ||
af30bffa | 290 | struct symbol *symbol__new(u64 start, u64 len, u8 binding, u8 type, const char *name) |
a2928c42 | 291 | { |
0085c954 | 292 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
293 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
294 | sizeof(*sym) + namelen)); | |
295 | if (sym == NULL) | |
0b73da3f IM |
296 | return NULL; |
297 | ||
b01141f4 ACM |
298 | if (symbol_conf.priv_size) { |
299 | if (symbol_conf.init_annotation) { | |
300 | struct annotation *notes = (void *)sym; | |
4f74f187 | 301 | annotation__init(notes); |
b01141f4 | 302 | } |
aeafcbaf | 303 | sym = ((void *)sym) + symbol_conf.priv_size; |
b01141f4 | 304 | } |
e4204992 | 305 | |
aeafcbaf | 306 | sym->start = start; |
2c241bd3 | 307 | sym->end = len ? start + len : start; |
af30bffa | 308 | sym->type = type; |
aeafcbaf ACM |
309 | sym->binding = binding; |
310 | sym->namelen = namelen - 1; | |
e4204992 | 311 | |
aeafcbaf ACM |
312 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
313 | __func__, name, start, sym->end); | |
314 | memcpy(sym->name, name, namelen); | |
a2928c42 | 315 | |
aeafcbaf | 316 | return sym; |
a2928c42 ACM |
317 | } |
318 | ||
aeafcbaf | 319 | void symbol__delete(struct symbol *sym) |
a2928c42 | 320 | { |
4f74f187 IR |
321 | if (symbol_conf.priv_size) { |
322 | if (symbol_conf.init_annotation) { | |
323 | struct annotation *notes = symbol__annotation(sym); | |
324 | ||
325 | annotation__exit(notes); | |
326 | } | |
327 | } | |
aeafcbaf | 328 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
329 | } |
330 | ||
7137ff50 | 331 | void symbols__delete(struct rb_root_cached *symbols) |
a2928c42 ACM |
332 | { |
333 | struct symbol *pos; | |
7137ff50 | 334 | struct rb_node *next = rb_first_cached(symbols); |
a2928c42 ACM |
335 | |
336 | while (next) { | |
337 | pos = rb_entry(next, struct symbol, rb_node); | |
338 | next = rb_next(&pos->rb_node); | |
7137ff50 | 339 | rb_erase_cached(&pos->rb_node, symbols); |
00a192b3 | 340 | symbol__delete(pos); |
a2928c42 ACM |
341 | } |
342 | } | |
343 | ||
7137ff50 DB |
344 | void __symbols__insert(struct rb_root_cached *symbols, |
345 | struct symbol *sym, bool kernel) | |
a2928c42 | 346 | { |
7137ff50 | 347 | struct rb_node **p = &symbols->rb_root.rb_node; |
a2928c42 | 348 | struct rb_node *parent = NULL; |
9cffa8d5 | 349 | const u64 ip = sym->start; |
a2928c42 | 350 | struct symbol *s; |
7137ff50 | 351 | bool leftmost = true; |
a2928c42 | 352 | |
608c34de ACM |
353 | if (kernel) { |
354 | const char *name = sym->name; | |
355 | /* | |
356 | * ppc64 uses function descriptors and appends a '.' to the | |
357 | * start of every instruction address. Remove it. | |
358 | */ | |
359 | if (name[0] == '.') | |
360 | name++; | |
361 | sym->idle = symbol__is_idle(name); | |
362 | } | |
363 | ||
a2928c42 ACM |
364 | while (*p != NULL) { |
365 | parent = *p; | |
366 | s = rb_entry(parent, struct symbol, rb_node); | |
367 | if (ip < s->start) | |
368 | p = &(*p)->rb_left; | |
7137ff50 | 369 | else { |
a2928c42 | 370 | p = &(*p)->rb_right; |
7137ff50 DB |
371 | leftmost = false; |
372 | } | |
a2928c42 ACM |
373 | } |
374 | rb_link_node(&sym->rb_node, parent, p); | |
7137ff50 | 375 | rb_insert_color_cached(&sym->rb_node, symbols, leftmost); |
a2928c42 ACM |
376 | } |
377 | ||
7137ff50 | 378 | void symbols__insert(struct rb_root_cached *symbols, struct symbol *sym) |
608c34de ACM |
379 | { |
380 | __symbols__insert(symbols, sym, false); | |
381 | } | |
382 | ||
7137ff50 | 383 | static struct symbol *symbols__find(struct rb_root_cached *symbols, u64 ip) |
a2928c42 ACM |
384 | { |
385 | struct rb_node *n; | |
386 | ||
aeafcbaf | 387 | if (symbols == NULL) |
a2928c42 ACM |
388 | return NULL; |
389 | ||
7137ff50 | 390 | n = symbols->rb_root.rb_node; |
a2928c42 ACM |
391 | |
392 | while (n) { | |
393 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
394 | ||
395 | if (ip < s->start) | |
396 | n = n->rb_left; | |
9c7b37cd | 397 | else if (ip > s->end || (ip == s->end && ip != s->start)) |
a2928c42 ACM |
398 | n = n->rb_right; |
399 | else | |
400 | return s; | |
401 | } | |
402 | ||
403 | return NULL; | |
404 | } | |
405 | ||
7137ff50 | 406 | static struct symbol *symbols__first(struct rb_root_cached *symbols) |
8e0cf965 | 407 | { |
7137ff50 | 408 | struct rb_node *n = rb_first_cached(symbols); |
8e0cf965 AH |
409 | |
410 | if (n) | |
411 | return rb_entry(n, struct symbol, rb_node); | |
412 | ||
413 | return NULL; | |
414 | } | |
415 | ||
7137ff50 | 416 | static struct symbol *symbols__last(struct rb_root_cached *symbols) |
cd67f99f | 417 | { |
7137ff50 | 418 | struct rb_node *n = rb_last(&symbols->rb_root); |
cd67f99f AH |
419 | |
420 | if (n) | |
421 | return rb_entry(n, struct symbol, rb_node); | |
422 | ||
423 | return NULL; | |
424 | } | |
425 | ||
9c00a81b AH |
426 | static struct symbol *symbols__next(struct symbol *sym) |
427 | { | |
428 | struct rb_node *n = rb_next(&sym->rb_node); | |
429 | ||
430 | if (n) | |
431 | return rb_entry(n, struct symbol, rb_node); | |
432 | ||
433 | return NULL; | |
434 | } | |
435 | ||
259dce91 | 436 | static int symbols__sort_name_cmp(const void *vlhs, const void *vrhs) |
79406cd7 | 437 | { |
259dce91 IR |
438 | const struct symbol *lhs = *((const struct symbol **)vlhs); |
439 | const struct symbol *rhs = *((const struct symbol **)vrhs); | |
02a9d037 | 440 | |
259dce91 | 441 | return strcmp(lhs->name, rhs->name); |
79406cd7 ACM |
442 | } |
443 | ||
259dce91 | 444 | static struct symbol **symbols__sort_by_name(struct rb_root_cached *source, size_t *len) |
79406cd7 ACM |
445 | { |
446 | struct rb_node *nd; | |
259dce91 IR |
447 | struct symbol **result; |
448 | size_t i = 0, size = 0; | |
449 | ||
450 | for (nd = rb_first_cached(source); nd; nd = rb_next(nd)) | |
451 | size++; | |
452 | ||
453 | result = malloc(sizeof(*result) * size); | |
454 | if (!result) | |
455 | return NULL; | |
79406cd7 | 456 | |
7137ff50 | 457 | for (nd = rb_first_cached(source); nd; nd = rb_next(nd)) { |
79406cd7 | 458 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); |
259dce91 IR |
459 | |
460 | result[i++] = pos; | |
79406cd7 | 461 | } |
259dce91 IR |
462 | qsort(result, size, sizeof(*result), symbols__sort_name_cmp); |
463 | *len = size; | |
464 | return result; | |
79406cd7 ACM |
465 | } |
466 | ||
d8040645 PC |
467 | int symbol__match_symbol_name(const char *name, const char *str, |
468 | enum symbol_tag_include includes) | |
469 | { | |
470 | const char *versioning; | |
471 | ||
472 | if (includes == SYMBOL_TAG_INCLUDE__DEFAULT_ONLY && | |
473 | (versioning = strstr(name, "@@"))) { | |
474 | int len = strlen(str); | |
475 | ||
476 | if (len < versioning - name) | |
477 | len = versioning - name; | |
478 | ||
479 | return arch__compare_symbol_names_n(name, str, len); | |
480 | } else | |
481 | return arch__compare_symbol_names(name, str); | |
482 | } | |
483 | ||
259dce91 IR |
484 | static struct symbol *symbols__find_by_name(struct symbol *symbols[], |
485 | size_t symbols_len, | |
d8040645 | 486 | const char *name, |
259dce91 IR |
487 | enum symbol_tag_include includes, |
488 | size_t *found_idx) | |
79406cd7 | 489 | { |
259dce91 | 490 | size_t i, lower = 0, upper = symbols_len; |
78a175c4 JC |
491 | struct symbol *s = NULL; |
492 | ||
493 | if (found_idx) | |
494 | *found_idx = SIZE_MAX; | |
79406cd7 | 495 | |
259dce91 | 496 | if (!symbols_len) |
79406cd7 ACM |
497 | return NULL; |
498 | ||
259dce91 | 499 | while (lower < upper) { |
79406cd7 ACM |
500 | int cmp; |
501 | ||
259dce91 | 502 | i = (lower + upper) / 2; |
78a175c4 | 503 | cmp = symbol__match_symbol_name(symbols[i]->name, name, includes); |
79406cd7 | 504 | |
d8040645 | 505 | if (cmp > 0) |
259dce91 | 506 | upper = i; |
d8040645 | 507 | else if (cmp < 0) |
259dce91 IR |
508 | lower = i + 1; |
509 | else { | |
510 | if (found_idx) | |
511 | *found_idx = i; | |
78a175c4 | 512 | s = symbols[i]; |
de480999 | 513 | break; |
259dce91 | 514 | } |
79406cd7 | 515 | } |
78a175c4 | 516 | if (s && includes != SYMBOL_TAG_INCLUDE__DEFAULT_ONLY) { |
d8040645 | 517 | /* return first symbol that has same name (if any) */ |
259dce91 IR |
518 | for (; i > 0; i--) { |
519 | struct symbol *tmp = symbols[i - 1]; | |
de480999 | 520 | |
259dce91 IR |
521 | if (!arch__compare_symbol_names(tmp->name, s->name)) { |
522 | if (found_idx) | |
523 | *found_idx = i - 1; | |
78a175c4 | 524 | s = tmp; |
259dce91 | 525 | } else |
d8040645 | 526 | break; |
d8040645 | 527 | } |
259dce91 | 528 | } |
78a175c4 | 529 | assert(!found_idx || !s || s == symbols[*found_idx]); |
259dce91 | 530 | return s; |
79406cd7 ACM |
531 | } |
532 | ||
c0b4dffb ACM |
533 | void dso__reset_find_symbol_cache(struct dso *dso) |
534 | { | |
3183f8ca ACM |
535 | dso->last_find_result.addr = 0; |
536 | dso->last_find_result.symbol = NULL; | |
c0b4dffb ACM |
537 | } |
538 | ||
3183f8ca | 539 | void dso__insert_symbol(struct dso *dso, struct symbol *sym) |
ae93a6c7 | 540 | { |
3183f8ca | 541 | __symbols__insert(&dso->symbols, sym, dso->kernel); |
ae93a6c7 CP |
542 | |
543 | /* update the symbol cache if necessary */ | |
3183f8ca ACM |
544 | if (dso->last_find_result.addr >= sym->start && |
545 | (dso->last_find_result.addr < sym->end || | |
ae93a6c7 | 546 | sym->start == sym->end)) { |
3183f8ca | 547 | dso->last_find_result.symbol = sym; |
ae93a6c7 CP |
548 | } |
549 | } | |
550 | ||
ab8bf5f2 TR |
551 | void dso__delete_symbol(struct dso *dso, struct symbol *sym) |
552 | { | |
553 | rb_erase_cached(&sym->rb_node, &dso->symbols); | |
554 | symbol__delete(sym); | |
555 | dso__reset_find_symbol_cache(dso); | |
556 | } | |
557 | ||
3183f8ca | 558 | struct symbol *dso__find_symbol(struct dso *dso, u64 addr) |
fcf1203a | 559 | { |
3183f8ca ACM |
560 | if (dso->last_find_result.addr != addr || dso->last_find_result.symbol == NULL) { |
561 | dso->last_find_result.addr = addr; | |
562 | dso->last_find_result.symbol = symbols__find(&dso->symbols, addr); | |
b685ac22 ACM |
563 | } |
564 | ||
3183f8ca | 565 | return dso->last_find_result.symbol; |
9c00a81b AH |
566 | } |
567 | ||
a2db72c5 AH |
568 | struct symbol *dso__find_symbol_nocache(struct dso *dso, u64 addr) |
569 | { | |
570 | return symbols__find(&dso->symbols, addr); | |
571 | } | |
572 | ||
5cf88a63 ACM |
573 | struct symbol *dso__first_symbol(struct dso *dso) |
574 | { | |
3183f8ca | 575 | return symbols__first(&dso->symbols); |
cd67f99f AH |
576 | } |
577 | ||
5cf88a63 ACM |
578 | struct symbol *dso__last_symbol(struct dso *dso) |
579 | { | |
3183f8ca | 580 | return symbols__last(&dso->symbols); |
5cf88a63 ACM |
581 | } |
582 | ||
9c00a81b AH |
583 | struct symbol *dso__next_symbol(struct symbol *sym) |
584 | { | |
585 | return symbols__next(sym); | |
8e0cf965 AH |
586 | } |
587 | ||
259dce91 | 588 | struct symbol *dso__next_symbol_by_name(struct dso *dso, size_t *idx) |
18bd7264 | 589 | { |
259dce91 IR |
590 | if (*idx + 1 >= dso->symbol_names_len) |
591 | return NULL; | |
18bd7264 | 592 | |
259dce91 IR |
593 | ++*idx; |
594 | return dso->symbol_names[*idx]; | |
18bd7264 ACM |
595 | } |
596 | ||
597 | /* | |
af07eeb0 | 598 | * Returns first symbol that matched with @name. |
18bd7264 | 599 | */ |
259dce91 | 600 | struct symbol *dso__find_symbol_by_name(struct dso *dso, const char *name, size_t *idx) |
79406cd7 | 601 | { |
259dce91 IR |
602 | struct symbol *s = symbols__find_by_name(dso->symbol_names, dso->symbol_names_len, |
603 | name, SYMBOL_TAG_INCLUDE__NONE, idx); | |
d8040645 | 604 | if (!s) |
259dce91 IR |
605 | s = symbols__find_by_name(dso->symbol_names, dso->symbol_names_len, |
606 | name, SYMBOL_TAG_INCLUDE__DEFAULT_ONLY, idx); | |
d8040645 | 607 | return s; |
79406cd7 ACM |
608 | } |
609 | ||
3183f8ca | 610 | void dso__sort_by_name(struct dso *dso) |
79406cd7 | 611 | { |
ce5b2934 IR |
612 | mutex_lock(&dso->lock); |
613 | if (!dso__sorted_by_name(dso)) { | |
259dce91 IR |
614 | size_t len; |
615 | ||
616 | dso->symbol_names = symbols__sort_by_name(&dso->symbols, &len); | |
617 | if (dso->symbol_names) { | |
618 | dso->symbol_names_len = len; | |
619 | dso__set_sorted_by_name(dso); | |
620 | } | |
ce5b2934 IR |
621 | } |
622 | mutex_unlock(&dso->lock); | |
79406cd7 ACM |
623 | } |
624 | ||
32add10f IR |
625 | /* |
626 | * While we find nice hex chars, build a long_val. | |
627 | * Return number of chars processed. | |
628 | */ | |
629 | static int hex2u64(const char *ptr, u64 *long_val) | |
630 | { | |
631 | char *p; | |
632 | ||
633 | *long_val = strtoull(ptr, &p, 16); | |
634 | ||
635 | return p - ptr; | |
636 | } | |
637 | ||
638 | ||
316d70d6 AH |
639 | int modules__parse(const char *filename, void *arg, |
640 | int (*process_module)(void *arg, const char *name, | |
9ad4652b | 641 | u64 start, u64 size)) |
316d70d6 AH |
642 | { |
643 | char *line = NULL; | |
644 | size_t n; | |
645 | FILE *file; | |
646 | int err = 0; | |
647 | ||
648 | file = fopen(filename, "r"); | |
649 | if (file == NULL) | |
650 | return -1; | |
651 | ||
652 | while (1) { | |
653 | char name[PATH_MAX]; | |
9ad4652b TR |
654 | u64 start, size; |
655 | char *sep, *endptr; | |
316d70d6 AH |
656 | ssize_t line_len; |
657 | ||
658 | line_len = getline(&line, &n, file); | |
659 | if (line_len < 0) { | |
660 | if (feof(file)) | |
661 | break; | |
662 | err = -1; | |
663 | goto out; | |
664 | } | |
665 | ||
666 | if (!line) { | |
667 | err = -1; | |
668 | goto out; | |
669 | } | |
670 | ||
671 | line[--line_len] = '\0'; /* \n */ | |
672 | ||
673 | sep = strrchr(line, 'x'); | |
674 | if (sep == NULL) | |
675 | continue; | |
676 | ||
677 | hex2u64(sep + 1, &start); | |
678 | ||
679 | sep = strchr(line, ' '); | |
680 | if (sep == NULL) | |
681 | continue; | |
682 | ||
683 | *sep = '\0'; | |
684 | ||
685 | scnprintf(name, sizeof(name), "[%s]", line); | |
686 | ||
9ad4652b TR |
687 | size = strtoul(sep + 1, &endptr, 0); |
688 | if (*endptr != ' ' && *endptr != '\t') | |
689 | continue; | |
690 | ||
691 | err = process_module(arg, name, start, size); | |
316d70d6 AH |
692 | if (err) |
693 | break; | |
694 | } | |
695 | out: | |
696 | free(line); | |
697 | fclose(file); | |
698 | return err; | |
699 | } | |
700 | ||
e7110b9f ACM |
701 | /* |
702 | * These are symbols in the kernel image, so make sure that | |
703 | * sym is from a kernel DSO. | |
704 | */ | |
608c34de | 705 | static bool symbol__is_idle(const char *name) |
82d1deb0 DA |
706 | { |
707 | const char * const idle_symbols[] = { | |
0e71459a KP |
708 | "acpi_idle_do_entry", |
709 | "acpi_processor_ffh_cstate_enter", | |
549aff77 | 710 | "arch_cpu_idle", |
82d1deb0 | 711 | "cpu_idle", |
e0336ed6 | 712 | "cpu_startup_entry", |
0e71459a | 713 | "idle_cpu", |
82d1deb0 | 714 | "intel_idle", |
29a2fd7c | 715 | "intel_idle_ibrs", |
82d1deb0 DA |
716 | "default_idle", |
717 | "native_safe_halt", | |
718 | "enter_idle", | |
719 | "exit_idle", | |
720 | "mwait_idle", | |
721 | "mwait_idle_with_hints", | |
783abbd4 | 722 | "mwait_idle_with_hints.constprop.0", |
82d1deb0 DA |
723 | "poll_idle", |
724 | "ppc64_runlatch_off", | |
725 | "pseries_dedicated_idle_sleep", | |
19bf119c SS |
726 | "psw_idle", |
727 | "psw_idle_exit", | |
82d1deb0 DA |
728 | NULL |
729 | }; | |
82d1deb0 | 730 | int i; |
bc5f15be | 731 | static struct strlist *idle_symbols_list; |
82d1deb0 | 732 | |
bc5f15be KP |
733 | if (idle_symbols_list) |
734 | return strlist__has_entry(idle_symbols_list, name); | |
735 | ||
736 | idle_symbols_list = strlist__new(NULL, NULL); | |
737 | ||
738 | for (i = 0; idle_symbols[i]; i++) | |
739 | strlist__add(idle_symbols_list, idle_symbols[i]); | |
82d1deb0 | 740 | |
bc5f15be | 741 | return strlist__has_entry(idle_symbols_list, name); |
82d1deb0 DA |
742 | } |
743 | ||
682b335a | 744 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 745 | char type, u64 start) |
682b335a ACM |
746 | { |
747 | struct symbol *sym; | |
333cc76c | 748 | struct dso *dso = arg; |
7137ff50 | 749 | struct rb_root_cached *root = &dso->symbols; |
682b335a | 750 | |
3183f8ca | 751 | if (!symbol_type__filter(type)) |
682b335a ACM |
752 | return 0; |
753 | ||
1a86f4ba LS |
754 | /* Ignore local symbols for ARM modules */ |
755 | if (name[0] == '$') | |
756 | return 0; | |
757 | ||
82151520 CS |
758 | /* |
759 | * module symbols are not sorted so we add all | |
760 | * symbols, setting length to 0, and rely on | |
761 | * symbols__fixup_end() to fix it up. | |
762 | */ | |
af30bffa | 763 | sym = symbol__new(start, 0, kallsyms2elf_binding(type), kallsyms2elf_type(type), name); |
682b335a ACM |
764 | if (sym == NULL) |
765 | return -ENOMEM; | |
766 | /* | |
767 | * We will pass the symbols to the filter later, in | |
768 | * map__split_kallsyms, when we have split the maps per module | |
769 | */ | |
608c34de | 770 | __symbols__insert(root, sym, !strchr(name, '[')); |
a1645ce1 | 771 | |
682b335a ACM |
772 | return 0; |
773 | } | |
774 | ||
775 | /* | |
776 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
777 | * so that we can in the next step set the symbol ->end address and then | |
778 | * call kernel_maps__split_kallsyms. | |
779 | */ | |
333cc76c | 780 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename) |
682b335a | 781 | { |
333cc76c | 782 | return kallsyms__parse(filename, dso, map__process_kallsym_symbol); |
682b335a ACM |
783 | } |
784 | ||
79b6bb73 | 785 | static int maps__split_kallsyms_for_kcore(struct maps *kmaps, struct dso *dso) |
8e0cf965 | 786 | { |
8e0cf965 | 787 | struct symbol *pos; |
866548dd | 788 | int count = 0; |
7137ff50 DB |
789 | struct rb_root_cached old_root = dso->symbols; |
790 | struct rb_root_cached *root = &dso->symbols; | |
791 | struct rb_node *next = rb_first_cached(root); | |
8e0cf965 | 792 | |
ba92732e WN |
793 | if (!kmaps) |
794 | return -1; | |
795 | ||
7137ff50 | 796 | *root = RB_ROOT_CACHED; |
866548dd | 797 | |
8e0cf965 | 798 | while (next) { |
42fd623b | 799 | struct map *curr_map; |
63df0e4b | 800 | struct dso *curr_map_dso; |
8e0cf965 AH |
801 | char *module; |
802 | ||
803 | pos = rb_entry(next, struct symbol, rb_node); | |
804 | next = rb_next(&pos->rb_node); | |
805 | ||
7137ff50 DB |
806 | rb_erase_cached(&pos->rb_node, &old_root); |
807 | RB_CLEAR_NODE(&pos->rb_node); | |
8e0cf965 AH |
808 | module = strchr(pos->name, '\t'); |
809 | if (module) | |
810 | *module = '\0'; | |
811 | ||
79b6bb73 | 812 | curr_map = maps__find(kmaps, pos->start); |
8e0cf965 | 813 | |
be39db9f | 814 | if (!curr_map) { |
8e0cf965 | 815 | symbol__delete(pos); |
866548dd | 816 | continue; |
8e0cf965 | 817 | } |
63df0e4b | 818 | curr_map_dso = map__dso(curr_map); |
2a6e5e8a | 819 | pos->start -= map__start(curr_map) - map__pgoff(curr_map); |
e5116f46 IR |
820 | if (pos->end > map__end(curr_map)) |
821 | pos->end = map__end(curr_map); | |
866548dd | 822 | if (pos->end) |
2a6e5e8a | 823 | pos->end -= map__start(curr_map) - map__pgoff(curr_map); |
63df0e4b | 824 | symbols__insert(&curr_map_dso->symbols, pos); |
866548dd | 825 | ++count; |
42fd623b | 826 | map__put(curr_map); |
8e0cf965 AH |
827 | } |
828 | ||
829 | /* Symbols have been adjusted */ | |
830 | dso->adjust_symbols = 1; | |
831 | ||
866548dd | 832 | return count; |
8e0cf965 AH |
833 | } |
834 | ||
2e538c4a ACM |
835 | /* |
836 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
837 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
838 | * the original ELF section names vmlinux have. | |
839 | */ | |
79b6bb73 ACM |
840 | static int maps__split_kallsyms(struct maps *kmaps, struct dso *dso, u64 delta, |
841 | struct map *initial_map) | |
2e538c4a | 842 | { |
ba92732e | 843 | struct machine *machine; |
107ef66c | 844 | struct map *curr_map = map__get(initial_map); |
2e538c4a | 845 | struct symbol *pos; |
48000a1a | 846 | int count = 0, moved = 0; |
7137ff50 DB |
847 | struct rb_root_cached *root = &dso->symbols; |
848 | struct rb_node *next = rb_first_cached(root); | |
2e538c4a | 849 | int kernel_range = 0; |
4d004365 | 850 | bool x86_64; |
2e538c4a | 851 | |
ba92732e WN |
852 | if (!kmaps) |
853 | return -1; | |
854 | ||
5ab6d715 | 855 | machine = maps__machine(kmaps); |
ba92732e | 856 | |
4d004365 AH |
857 | x86_64 = machine__is(machine, "x86_64"); |
858 | ||
2e538c4a ACM |
859 | while (next) { |
860 | char *module; | |
861 | ||
862 | pos = rb_entry(next, struct symbol, rb_node); | |
863 | next = rb_next(&pos->rb_node); | |
864 | ||
865 | module = strchr(pos->name, '\t'); | |
866 | if (module) { | |
63df0e4b IR |
867 | struct dso *curr_map_dso; |
868 | ||
75be6cf4 | 869 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
870 | goto discard_symbol; |
871 | ||
2e538c4a | 872 | *module++ = '\0'; |
63df0e4b IR |
873 | curr_map_dso = map__dso(curr_map); |
874 | if (strcmp(curr_map_dso->short_name, module)) { | |
78c32f4c | 875 | if (!RC_CHK_EQUAL(curr_map, initial_map) && |
1c695c88 | 876 | dso->kernel == DSO_SPACE__KERNEL_GUEST && |
23346f21 | 877 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
878 | /* |
879 | * We assume all symbols of a module are | |
880 | * continuous in * kallsyms, so curr_map | |
881 | * points to a module and all its | |
882 | * symbols are in its kmap. Mark it as | |
883 | * loaded. | |
884 | */ | |
63df0e4b | 885 | dso__set_loaded(curr_map_dso); |
a1645ce1 ZY |
886 | } |
887 | ||
107ef66c | 888 | map__zput(curr_map); |
79b6bb73 | 889 | curr_map = maps__find_by_name(kmaps, module); |
4e06255f | 890 | if (curr_map == NULL) { |
2f51903b | 891 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 892 | "inconsistency while looking " |
a1645ce1 | 893 | "for \"%s\" module!\n", |
23346f21 | 894 | machine->root_dir, module); |
107ef66c | 895 | curr_map = map__get(initial_map); |
a1645ce1 | 896 | goto discard_symbol; |
af427bf5 | 897 | } |
63df0e4b IR |
898 | curr_map_dso = map__dso(curr_map); |
899 | if (curr_map_dso->loaded && | |
23346f21 | 900 | !machine__is_default_guest(machine)) |
b7cece76 | 901 | goto discard_symbol; |
af427bf5 | 902 | } |
2e538c4a ACM |
903 | /* |
904 | * So that we look just like we get from .ko files, | |
15e0e2d4 | 905 | * i.e. not prelinked, relative to initial_map->start. |
2e538c4a | 906 | */ |
78a1f7cd IR |
907 | pos->start = map__map_ip(curr_map, pos->start); |
908 | pos->end = map__map_ip(curr_map, pos->end); | |
4d004365 AH |
909 | } else if (x86_64 && is_entry_trampoline(pos->name)) { |
910 | /* | |
911 | * These symbols are not needed anymore since the | |
912 | * trampoline maps refer to the text section and it's | |
913 | * symbols instead. Avoid having to deal with | |
914 | * relocations, and the assumption that the first symbol | |
915 | * is the start of kernel text, by simply removing the | |
916 | * symbols at this point. | |
917 | */ | |
918 | goto discard_symbol; | |
107ef66c | 919 | } else if (!RC_CHK_EQUAL(curr_map, initial_map)) { |
2e538c4a | 920 | char dso_name[PATH_MAX]; |
aeafcbaf | 921 | struct dso *ndso; |
2e538c4a | 922 | |
d9b62aba AH |
923 | if (delta) { |
924 | /* Kernel was relocated at boot time */ | |
925 | pos->start -= delta; | |
926 | pos->end -= delta; | |
927 | } | |
928 | ||
8a953312 | 929 | if (count == 0) { |
107ef66c IR |
930 | map__zput(curr_map); |
931 | curr_map = map__get(initial_map); | |
be39db9f | 932 | goto add_symbol; |
8a953312 ACM |
933 | } |
934 | ||
1c695c88 | 935 | if (dso->kernel == DSO_SPACE__KERNEL_GUEST) |
a1645ce1 ZY |
936 | snprintf(dso_name, sizeof(dso_name), |
937 | "[guest.kernel].%d", | |
938 | kernel_range++); | |
939 | else | |
940 | snprintf(dso_name, sizeof(dso_name), | |
941 | "[kernel].%d", | |
942 | kernel_range++); | |
2e538c4a | 943 | |
aeafcbaf | 944 | ndso = dso__new(dso_name); |
107ef66c | 945 | map__zput(curr_map); |
aeafcbaf | 946 | if (ndso == NULL) |
2e538c4a ACM |
947 | return -1; |
948 | ||
aeafcbaf | 949 | ndso->kernel = dso->kernel; |
a1645ce1 | 950 | |
3183f8ca | 951 | curr_map = map__new2(pos->start, ndso); |
37fe5fcb | 952 | if (curr_map == NULL) { |
d3a7c489 | 953 | dso__put(ndso); |
2e538c4a ACM |
954 | return -1; |
955 | } | |
a2928c42 | 956 | |
9fa688ea | 957 | map__set_mapping_type(curr_map, MAPPING_TYPE__IDENTITY); |
ff583dc4 | 958 | if (maps__insert(kmaps, curr_map)) { |
107ef66c | 959 | map__zput(curr_map); |
ff583dc4 IR |
960 | dso__put(ndso); |
961 | return -1; | |
962 | } | |
2e538c4a | 963 | ++kernel_range; |
d9b62aba AH |
964 | } else if (delta) { |
965 | /* Kernel was relocated at boot time */ | |
966 | pos->start -= delta; | |
967 | pos->end -= delta; | |
2e538c4a | 968 | } |
be39db9f | 969 | add_symbol: |
107ef66c | 970 | if (!RC_CHK_EQUAL(curr_map, initial_map)) { |
63df0e4b IR |
971 | struct dso *curr_map_dso = map__dso(curr_map); |
972 | ||
7137ff50 | 973 | rb_erase_cached(&pos->rb_node, root); |
63df0e4b | 974 | symbols__insert(&curr_map_dso->symbols, pos); |
be39db9f ACM |
975 | ++moved; |
976 | } else | |
977 | ++count; | |
978 | ||
979 | continue; | |
980 | discard_symbol: | |
7137ff50 | 981 | rb_erase_cached(&pos->rb_node, root); |
be39db9f | 982 | symbol__delete(pos); |
a2928c42 ACM |
983 | } |
984 | ||
107ef66c | 985 | if (!RC_CHK_EQUAL(curr_map, initial_map) && |
1c695c88 | 986 | dso->kernel == DSO_SPACE__KERNEL_GUEST && |
5ab6d715 | 987 | machine__is_default_guest(maps__machine(kmaps))) { |
63df0e4b | 988 | dso__set_loaded(map__dso(curr_map)); |
a1645ce1 | 989 | } |
107ef66c | 990 | map__put(curr_map); |
8a953312 | 991 | return count + moved; |
2e538c4a | 992 | } |
a2928c42 | 993 | |
3f067dca ACM |
994 | bool symbol__restricted_filename(const char *filename, |
995 | const char *restricted_filename) | |
ec80fde7 ACM |
996 | { |
997 | bool restricted = false; | |
998 | ||
999 | if (symbol_conf.kptr_restrict) { | |
1000 | char *r = realpath(filename, NULL); | |
1001 | ||
1002 | if (r != NULL) { | |
1003 | restricted = strcmp(r, restricted_filename) == 0; | |
1004 | free(r); | |
1005 | return restricted; | |
1006 | } | |
1007 | } | |
1008 | ||
1009 | return restricted; | |
1010 | } | |
1011 | ||
52afdaf9 AH |
1012 | struct module_info { |
1013 | struct rb_node rb_node; | |
1014 | char *name; | |
1015 | u64 start; | |
8e0cf965 AH |
1016 | }; |
1017 | ||
52afdaf9 | 1018 | static void add_module(struct module_info *mi, struct rb_root *modules) |
8e0cf965 | 1019 | { |
52afdaf9 AH |
1020 | struct rb_node **p = &modules->rb_node; |
1021 | struct rb_node *parent = NULL; | |
1022 | struct module_info *m; | |
8e0cf965 | 1023 | |
52afdaf9 AH |
1024 | while (*p != NULL) { |
1025 | parent = *p; | |
1026 | m = rb_entry(parent, struct module_info, rb_node); | |
1027 | if (strcmp(mi->name, m->name) < 0) | |
1028 | p = &(*p)->rb_left; | |
1029 | else | |
1030 | p = &(*p)->rb_right; | |
1031 | } | |
1032 | rb_link_node(&mi->rb_node, parent, p); | |
1033 | rb_insert_color(&mi->rb_node, modules); | |
1034 | } | |
1035 | ||
1036 | static void delete_modules(struct rb_root *modules) | |
1037 | { | |
1038 | struct module_info *mi; | |
1039 | struct rb_node *next = rb_first(modules); | |
1040 | ||
1041 | while (next) { | |
1042 | mi = rb_entry(next, struct module_info, rb_node); | |
1043 | next = rb_next(&mi->rb_node); | |
1044 | rb_erase(&mi->rb_node, modules); | |
74cf249d | 1045 | zfree(&mi->name); |
52afdaf9 AH |
1046 | free(mi); |
1047 | } | |
1048 | } | |
1049 | ||
1050 | static struct module_info *find_module(const char *name, | |
1051 | struct rb_root *modules) | |
1052 | { | |
1053 | struct rb_node *n = modules->rb_node; | |
1054 | ||
1055 | while (n) { | |
1056 | struct module_info *m; | |
1057 | int cmp; | |
1058 | ||
1059 | m = rb_entry(n, struct module_info, rb_node); | |
1060 | cmp = strcmp(name, m->name); | |
1061 | if (cmp < 0) | |
1062 | n = n->rb_left; | |
1063 | else if (cmp > 0) | |
1064 | n = n->rb_right; | |
1065 | else | |
1066 | return m; | |
1067 | } | |
1068 | ||
1069 | return NULL; | |
1070 | } | |
1071 | ||
9ad4652b TR |
1072 | static int __read_proc_modules(void *arg, const char *name, u64 start, |
1073 | u64 size __maybe_unused) | |
52afdaf9 AH |
1074 | { |
1075 | struct rb_root *modules = arg; | |
1076 | struct module_info *mi; | |
1077 | ||
1078 | mi = zalloc(sizeof(struct module_info)); | |
1079 | if (!mi) | |
8e0cf965 AH |
1080 | return -ENOMEM; |
1081 | ||
52afdaf9 AH |
1082 | mi->name = strdup(name); |
1083 | mi->start = start; | |
8e0cf965 | 1084 | |
52afdaf9 AH |
1085 | if (!mi->name) { |
1086 | free(mi); | |
1087 | return -ENOMEM; | |
1088 | } | |
1089 | ||
1090 | add_module(mi, modules); | |
1091 | ||
1092 | return 0; | |
1093 | } | |
1094 | ||
1095 | static int read_proc_modules(const char *filename, struct rb_root *modules) | |
1096 | { | |
1097 | if (symbol__restricted_filename(filename, "/proc/modules")) | |
1098 | return -1; | |
1099 | ||
1100 | if (modules__parse(filename, modules, __read_proc_modules)) { | |
1101 | delete_modules(modules); | |
1102 | return -1; | |
1103 | } | |
8e0cf965 AH |
1104 | |
1105 | return 0; | |
1106 | } | |
1107 | ||
fc1b691d AH |
1108 | int compare_proc_modules(const char *from, const char *to) |
1109 | { | |
1110 | struct rb_root from_modules = RB_ROOT; | |
1111 | struct rb_root to_modules = RB_ROOT; | |
1112 | struct rb_node *from_node, *to_node; | |
1113 | struct module_info *from_m, *to_m; | |
1114 | int ret = -1; | |
1115 | ||
1116 | if (read_proc_modules(from, &from_modules)) | |
1117 | return -1; | |
1118 | ||
1119 | if (read_proc_modules(to, &to_modules)) | |
1120 | goto out_delete_from; | |
1121 | ||
1122 | from_node = rb_first(&from_modules); | |
1123 | to_node = rb_first(&to_modules); | |
1124 | while (from_node) { | |
1125 | if (!to_node) | |
1126 | break; | |
1127 | ||
1128 | from_m = rb_entry(from_node, struct module_info, rb_node); | |
1129 | to_m = rb_entry(to_node, struct module_info, rb_node); | |
1130 | ||
1131 | if (from_m->start != to_m->start || | |
1132 | strcmp(from_m->name, to_m->name)) | |
1133 | break; | |
1134 | ||
1135 | from_node = rb_next(from_node); | |
1136 | to_node = rb_next(to_node); | |
1137 | } | |
1138 | ||
1139 | if (!from_node && !to_node) | |
1140 | ret = 0; | |
1141 | ||
1142 | delete_modules(&to_modules); | |
1143 | out_delete_from: | |
1144 | delete_modules(&from_modules); | |
1145 | ||
1146 | return ret; | |
1147 | } | |
1148 | ||
111350c6 IR |
1149 | static int do_validate_kcore_modules_cb(struct map *old_map, void *data) |
1150 | { | |
1151 | struct rb_root *modules = data; | |
1152 | struct module_info *mi; | |
1153 | struct dso *dso; | |
1154 | ||
1155 | if (!__map__is_kmodule(old_map)) | |
1156 | return 0; | |
1157 | ||
1158 | dso = map__dso(old_map); | |
1159 | /* Module must be in memory at the same address */ | |
1160 | mi = find_module(dso->short_name, modules); | |
1161 | if (!mi || mi->start != map__start(old_map)) | |
1162 | return -EINVAL; | |
1163 | ||
1164 | return 0; | |
1165 | } | |
1166 | ||
79b6bb73 | 1167 | static int do_validate_kcore_modules(const char *filename, struct maps *kmaps) |
52afdaf9 AH |
1168 | { |
1169 | struct rb_root modules = RB_ROOT; | |
52afdaf9 AH |
1170 | int err; |
1171 | ||
1172 | err = read_proc_modules(filename, &modules); | |
1173 | if (err) | |
1174 | return err; | |
1175 | ||
111350c6 | 1176 | err = maps__for_each_map(kmaps, do_validate_kcore_modules_cb, &modules); |
52afdaf9 | 1177 | |
52afdaf9 AH |
1178 | delete_modules(&modules); |
1179 | return err; | |
1180 | } | |
1181 | ||
8e0cf965 | 1182 | /* |
52afdaf9 | 1183 | * If kallsyms is referenced by name then we look for filename in the same |
8e0cf965 AH |
1184 | * directory. |
1185 | */ | |
52afdaf9 AH |
1186 | static bool filename_from_kallsyms_filename(char *filename, |
1187 | const char *base_name, | |
1188 | const char *kallsyms_filename) | |
8e0cf965 AH |
1189 | { |
1190 | char *name; | |
1191 | ||
52afdaf9 AH |
1192 | strcpy(filename, kallsyms_filename); |
1193 | name = strrchr(filename, '/'); | |
8e0cf965 AH |
1194 | if (!name) |
1195 | return false; | |
1196 | ||
52afdaf9 AH |
1197 | name += 1; |
1198 | ||
1199 | if (!strcmp(name, "kallsyms")) { | |
1200 | strcpy(name, base_name); | |
8e0cf965 AH |
1201 | return true; |
1202 | } | |
1203 | ||
1204 | return false; | |
1205 | } | |
1206 | ||
52afdaf9 AH |
1207 | static int validate_kcore_modules(const char *kallsyms_filename, |
1208 | struct map *map) | |
1209 | { | |
79b6bb73 | 1210 | struct maps *kmaps = map__kmaps(map); |
52afdaf9 AH |
1211 | char modules_filename[PATH_MAX]; |
1212 | ||
ba92732e WN |
1213 | if (!kmaps) |
1214 | return -EINVAL; | |
1215 | ||
52afdaf9 AH |
1216 | if (!filename_from_kallsyms_filename(modules_filename, "modules", |
1217 | kallsyms_filename)) | |
1218 | return -EINVAL; | |
1219 | ||
5759a682 | 1220 | if (do_validate_kcore_modules(modules_filename, kmaps)) |
52afdaf9 AH |
1221 | return -EINVAL; |
1222 | ||
1223 | return 0; | |
1224 | } | |
1225 | ||
a00d28cb AH |
1226 | static int validate_kcore_addresses(const char *kallsyms_filename, |
1227 | struct map *map) | |
1228 | { | |
1229 | struct kmap *kmap = map__kmap(map); | |
1230 | ||
ba92732e WN |
1231 | if (!kmap) |
1232 | return -EINVAL; | |
1233 | ||
a00d28cb AH |
1234 | if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) { |
1235 | u64 start; | |
1236 | ||
b843f62a ACM |
1237 | if (kallsyms__get_function_start(kallsyms_filename, |
1238 | kmap->ref_reloc_sym->name, &start)) | |
1239 | return -ENOENT; | |
a00d28cb AH |
1240 | if (start != kmap->ref_reloc_sym->addr) |
1241 | return -EINVAL; | |
1242 | } | |
1243 | ||
1244 | return validate_kcore_modules(kallsyms_filename, map); | |
1245 | } | |
1246 | ||
52afdaf9 AH |
1247 | struct kcore_mapfn_data { |
1248 | struct dso *dso; | |
52afdaf9 AH |
1249 | struct list_head maps; |
1250 | }; | |
1251 | ||
1252 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
1253 | { | |
1254 | struct kcore_mapfn_data *md = data; | |
83720209 | 1255 | struct map_list_node *list_node = map_list_node__new(); |
52afdaf9 | 1256 | |
83720209 | 1257 | if (!list_node) |
52afdaf9 AH |
1258 | return -ENOMEM; |
1259 | ||
83720209 IR |
1260 | list_node->map = map__new2(start, md->dso); |
1261 | if (!list_node->map) { | |
1262 | free(list_node); | |
1263 | return -ENOMEM; | |
1264 | } | |
52afdaf9 | 1265 | |
e6a9efce ACM |
1266 | map__set_end(list_node->map, map__start(list_node->map) + len); |
1267 | map__set_pgoff(list_node->map, pgoff); | |
83720209 IR |
1268 | |
1269 | list_add(&list_node->node, &md->maps); | |
52afdaf9 AH |
1270 | |
1271 | return 0; | |
1272 | } | |
1273 | ||
8d5847a6 IR |
1274 | static bool remove_old_maps(struct map *map, void *data) |
1275 | { | |
1276 | const struct map *map_to_save = data; | |
1277 | ||
1278 | /* | |
1279 | * We need to preserve eBPF maps even if they are covered by kcore, | |
1280 | * because we need to access eBPF dso for source data. | |
1281 | */ | |
1282 | return !RC_CHK_EQUAL(map, map_to_save) && !__map__is_bpf_prog(map); | |
1283 | } | |
1284 | ||
8e0cf965 AH |
1285 | static int dso__load_kcore(struct dso *dso, struct map *map, |
1286 | const char *kallsyms_filename) | |
1287 | { | |
79b6bb73 | 1288 | struct maps *kmaps = map__kmaps(map); |
8e0cf965 | 1289 | struct kcore_mapfn_data md; |
ff583dc4 | 1290 | struct map *replacement_map = NULL; |
1c5aae77 | 1291 | struct machine *machine; |
8e0cf965 AH |
1292 | bool is_64_bit; |
1293 | int err, fd; | |
1294 | char kcore_filename[PATH_MAX]; | |
56549978 | 1295 | u64 stext; |
8e0cf965 | 1296 | |
ba92732e WN |
1297 | if (!kmaps) |
1298 | return -EINVAL; | |
1299 | ||
5ab6d715 | 1300 | machine = maps__machine(kmaps); |
1c5aae77 | 1301 | |
8e0cf965 | 1302 | /* This function requires that the map is the kernel map */ |
efdd5c6b | 1303 | if (!__map__is_kernel(map)) |
8e0cf965 AH |
1304 | return -EINVAL; |
1305 | ||
52afdaf9 AH |
1306 | if (!filename_from_kallsyms_filename(kcore_filename, "kcore", |
1307 | kallsyms_filename)) | |
1308 | return -EINVAL; | |
1309 | ||
a00d28cb AH |
1310 | /* Modules and kernel must be present at their original addresses */ |
1311 | if (validate_kcore_addresses(kallsyms_filename, map)) | |
8e0cf965 AH |
1312 | return -EINVAL; |
1313 | ||
1314 | md.dso = dso; | |
8e0cf965 AH |
1315 | INIT_LIST_HEAD(&md.maps); |
1316 | ||
1317 | fd = open(kcore_filename, O_RDONLY); | |
36c8bb56 | 1318 | if (fd < 0) { |
133de940 AH |
1319 | pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n", |
1320 | kcore_filename); | |
8e0cf965 | 1321 | return -EINVAL; |
36c8bb56 | 1322 | } |
8e0cf965 AH |
1323 | |
1324 | /* Read new maps into temporary lists */ | |
ddee3f2b | 1325 | err = file__read_maps(fd, map__prot(map) & PROT_EXEC, kcore_mapfn, &md, |
8e0cf965 AH |
1326 | &is_64_bit); |
1327 | if (err) | |
1328 | goto out_err; | |
c6d8f2a4 | 1329 | dso->is_64_bit = is_64_bit; |
8e0cf965 AH |
1330 | |
1331 | if (list_empty(&md.maps)) { | |
1332 | err = -EINVAL; | |
1333 | goto out_err; | |
1334 | } | |
1335 | ||
1336 | /* Remove old maps */ | |
8d5847a6 | 1337 | maps__remove_maps(kmaps, remove_old_maps, map); |
1c5aae77 | 1338 | machine->trampolines_mapped = false; |
8e0cf965 | 1339 | |
56549978 AH |
1340 | /* Find the kernel map using the '_stext' symbol */ |
1341 | if (!kallsyms__get_function_start(kallsyms_filename, "_stext", &stext)) { | |
1c249565 | 1342 | u64 replacement_size = 0; |
83720209 | 1343 | struct map_list_node *new_node; |
1c249565 | 1344 | |
83720209 IR |
1345 | list_for_each_entry(new_node, &md.maps, node) { |
1346 | struct map *new_map = new_node->map; | |
e5116f46 | 1347 | u64 new_size = map__size(new_map); |
1c249565 | 1348 | |
e5116f46 | 1349 | if (!(stext >= map__start(new_map) && stext < map__end(new_map))) |
1c249565 KJ |
1350 | continue; |
1351 | ||
1352 | /* | |
1353 | * On some architectures, ARM64 for example, the kernel | |
1354 | * text can get allocated inside of the vmalloc segment. | |
1355 | * Select the smallest matching segment, in case stext | |
1356 | * falls within more than one in the list. | |
1357 | */ | |
1358 | if (!replacement_map || new_size < replacement_size) { | |
56549978 | 1359 | replacement_map = new_map; |
1c249565 | 1360 | replacement_size = new_size; |
56549978 | 1361 | } |
8e0cf965 AH |
1362 | } |
1363 | } | |
1364 | ||
1365 | if (!replacement_map) | |
83720209 | 1366 | replacement_map = list_entry(md.maps.next, struct map_list_node, node)->map; |
8e0cf965 AH |
1367 | |
1368 | /* Add new maps */ | |
1369 | while (!list_empty(&md.maps)) { | |
83720209 IR |
1370 | struct map_list_node *new_node = list_entry(md.maps.next, struct map_list_node, node); |
1371 | struct map *new_map = new_node->map; | |
1372 | ||
1373 | list_del_init(&new_node->node); | |
1374 | ||
78c32f4c | 1375 | if (RC_CHK_EQUAL(new_map, replacement_map)) { |
0d98a7af JC |
1376 | struct map *map_ref; |
1377 | ||
e6a9efce ACM |
1378 | map__set_start(map, map__start(new_map)); |
1379 | map__set_end(map, map__end(new_map)); | |
1380 | map__set_pgoff(map, map__pgoff(new_map)); | |
9fa688ea | 1381 | map__set_mapping_type(map, map__mapping_type(new_map)); |
8e0cf965 | 1382 | /* Ensure maps are correctly ordered */ |
0d98a7af JC |
1383 | map_ref = map__get(map); |
1384 | maps__remove(kmaps, map_ref); | |
1385 | err = maps__insert(kmaps, map_ref); | |
1386 | map__put(map_ref); | |
fb5a88d4 | 1387 | map__put(new_map); |
ff583dc4 IR |
1388 | if (err) |
1389 | goto out_err; | |
8e0cf965 | 1390 | } else { |
fb5a88d4 JO |
1391 | /* |
1392 | * Merge kcore map into existing maps, | |
1393 | * and ensure that current maps (eBPF) | |
1394 | * stay intact. | |
1395 | */ | |
ff583dc4 IR |
1396 | if (maps__merge_in(kmaps, new_map)) { |
1397 | err = -EINVAL; | |
fb5a88d4 | 1398 | goto out_err; |
ff583dc4 | 1399 | } |
8e0cf965 | 1400 | } |
83720209 | 1401 | free(new_node); |
8e0cf965 AH |
1402 | } |
1403 | ||
1c5aae77 AH |
1404 | if (machine__is(machine, "x86_64")) { |
1405 | u64 addr; | |
1406 | ||
1407 | /* | |
1408 | * If one of the corresponding symbols is there, assume the | |
1409 | * entry trampoline maps are too. | |
1410 | */ | |
1411 | if (!kallsyms__get_function_start(kallsyms_filename, | |
1412 | ENTRY_TRAMPOLINE_NAME, | |
1413 | &addr)) | |
1414 | machine->trampolines_mapped = true; | |
1415 | } | |
1416 | ||
8e0cf965 AH |
1417 | /* |
1418 | * Set the data type and long name so that kcore can be read via | |
1419 | * dso__data_read_addr(). | |
1420 | */ | |
1c695c88 | 1421 | if (dso->kernel == DSO_SPACE__KERNEL_GUEST) |
5f70619d | 1422 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE; |
8e0cf965 | 1423 | else |
5f70619d | 1424 | dso->binary_type = DSO_BINARY_TYPE__KCORE; |
7e155d4d | 1425 | dso__set_long_name(dso, strdup(kcore_filename), true); |
8e0cf965 AH |
1426 | |
1427 | close(fd); | |
1428 | ||
ddee3f2b | 1429 | if (map__prot(map) & PROT_EXEC) |
8e0cf965 AH |
1430 | pr_debug("Using %s for kernel object code\n", kcore_filename); |
1431 | else | |
1432 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
1433 | ||
1434 | return 0; | |
1435 | ||
1436 | out_err: | |
1437 | while (!list_empty(&md.maps)) { | |
83720209 IR |
1438 | struct map_list_node *list_node; |
1439 | ||
1440 | list_node = list_entry(md.maps.next, struct map_list_node, node); | |
1441 | list_del_init(&list_node->node); | |
1442 | map__zput(list_node->map); | |
1443 | free(list_node); | |
8e0cf965 AH |
1444 | } |
1445 | close(fd); | |
ff583dc4 | 1446 | return err; |
8e0cf965 AH |
1447 | } |
1448 | ||
d9b62aba AH |
1449 | /* |
1450 | * If the kernel is relocated at boot time, kallsyms won't match. Compute the | |
1451 | * delta based on the relocation reference symbol. | |
1452 | */ | |
019c6820 | 1453 | static int kallsyms__delta(struct kmap *kmap, const char *filename, u64 *delta) |
d9b62aba | 1454 | { |
d9b62aba AH |
1455 | u64 addr; |
1456 | ||
1457 | if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name) | |
1458 | return 0; | |
1459 | ||
b843f62a | 1460 | if (kallsyms__get_function_start(filename, kmap->ref_reloc_sym->name, &addr)) |
d9b62aba AH |
1461 | return -1; |
1462 | ||
1463 | *delta = addr - kmap->ref_reloc_sym->addr; | |
1464 | return 0; | |
1465 | } | |
1466 | ||
e02092b9 | 1467 | int __dso__load_kallsyms(struct dso *dso, const char *filename, |
be39db9f | 1468 | struct map *map, bool no_kcore) |
2e538c4a | 1469 | { |
019c6820 | 1470 | struct kmap *kmap = map__kmap(map); |
d9b62aba AH |
1471 | u64 delta = 0; |
1472 | ||
ec80fde7 ACM |
1473 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1474 | return -1; | |
1475 | ||
019c6820 ACM |
1476 | if (!kmap || !kmap->kmaps) |
1477 | return -1; | |
1478 | ||
333cc76c | 1479 | if (dso__load_all_kallsyms(dso, filename) < 0) |
2e538c4a ACM |
1480 | return -1; |
1481 | ||
019c6820 | 1482 | if (kallsyms__delta(kmap, filename, &delta)) |
d9b62aba AH |
1483 | return -1; |
1484 | ||
838425f2 | 1485 | symbols__fixup_end(&dso->symbols, true); |
3183f8ca | 1486 | symbols__fixup_duplicate(&dso->symbols); |
3f5a4272 | 1487 | |
1c695c88 | 1488 | if (dso->kernel == DSO_SPACE__KERNEL_GUEST) |
44f24cb3 | 1489 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 1490 | else |
44f24cb3 | 1491 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 1492 | |
e02092b9 | 1493 | if (!no_kcore && !dso__load_kcore(dso, map, filename)) |
79b6bb73 | 1494 | return maps__split_kallsyms_for_kcore(kmap->kmaps, dso); |
8e0cf965 | 1495 | else |
79b6bb73 | 1496 | return maps__split_kallsyms(kmap->kmaps, dso, delta, map); |
af427bf5 ACM |
1497 | } |
1498 | ||
e02092b9 | 1499 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
be39db9f | 1500 | struct map *map) |
e02092b9 | 1501 | { |
be39db9f | 1502 | return __dso__load_kallsyms(dso, filename, map, false); |
e02092b9 ACM |
1503 | } |
1504 | ||
3183f8ca | 1505 | static int dso__load_perf_map(const char *map_path, struct dso *dso) |
80d496be PE |
1506 | { |
1507 | char *line = NULL; | |
1508 | size_t n; | |
1509 | FILE *file; | |
1510 | int nr_syms = 0; | |
1511 | ||
bf2e710b | 1512 | file = fopen(map_path, "r"); |
80d496be PE |
1513 | if (file == NULL) |
1514 | goto out_failure; | |
1515 | ||
1516 | while (!feof(file)) { | |
9cffa8d5 | 1517 | u64 start, size; |
80d496be PE |
1518 | struct symbol *sym; |
1519 | int line_len, len; | |
1520 | ||
1521 | line_len = getline(&line, &n, file); | |
1522 | if (line_len < 0) | |
1523 | break; | |
1524 | ||
1525 | if (!line) | |
1526 | goto out_failure; | |
1527 | ||
1528 | line[--line_len] = '\0'; /* \n */ | |
1529 | ||
1530 | len = hex2u64(line, &start); | |
1531 | ||
1532 | len++; | |
1533 | if (len + 2 >= line_len) | |
1534 | continue; | |
1535 | ||
1536 | len += hex2u64(line + len, &size); | |
1537 | ||
1538 | len++; | |
1539 | if (len + 2 >= line_len) | |
1540 | continue; | |
1541 | ||
af30bffa | 1542 | sym = symbol__new(start, size, STB_GLOBAL, STT_FUNC, line + len); |
80d496be PE |
1543 | |
1544 | if (sym == NULL) | |
1545 | goto out_delete_line; | |
1546 | ||
3183f8ca | 1547 | symbols__insert(&dso->symbols, sym); |
be39db9f | 1548 | nr_syms++; |
80d496be PE |
1549 | } |
1550 | ||
1551 | free(line); | |
1552 | fclose(file); | |
1553 | ||
1554 | return nr_syms; | |
1555 | ||
1556 | out_delete_line: | |
1557 | free(line); | |
1558 | out_failure: | |
1559 | return -1; | |
1560 | } | |
1561 | ||
eac9a434 RB |
1562 | #ifdef HAVE_LIBBFD_SUPPORT |
1563 | #define PACKAGE 'perf' | |
1564 | #include <bfd.h> | |
1565 | ||
1566 | static int bfd_symbols__cmpvalue(const void *a, const void *b) | |
1567 | { | |
1568 | const asymbol *as = *(const asymbol **)a, *bs = *(const asymbol **)b; | |
1569 | ||
1570 | if (bfd_asymbol_value(as) != bfd_asymbol_value(bs)) | |
1571 | return bfd_asymbol_value(as) - bfd_asymbol_value(bs); | |
1572 | ||
1573 | return bfd_asymbol_name(as)[0] - bfd_asymbol_name(bs)[0]; | |
1574 | } | |
1575 | ||
1576 | static int bfd2elf_binding(asymbol *symbol) | |
1577 | { | |
1578 | if (symbol->flags & BSF_WEAK) | |
1579 | return STB_WEAK; | |
1580 | if (symbol->flags & BSF_GLOBAL) | |
1581 | return STB_GLOBAL; | |
1582 | if (symbol->flags & BSF_LOCAL) | |
1583 | return STB_LOCAL; | |
1584 | return -1; | |
1585 | } | |
1586 | ||
1587 | int dso__load_bfd_symbols(struct dso *dso, const char *debugfile) | |
1588 | { | |
1589 | int err = -1; | |
96de68ff | 1590 | long symbols_size, symbols_count, i; |
eac9a434 RB |
1591 | asection *section; |
1592 | asymbol **symbols, *sym; | |
1593 | struct symbol *symbol; | |
1594 | bfd *abfd; | |
eac9a434 RB |
1595 | u64 start, len; |
1596 | ||
00a34234 | 1597 | abfd = bfd_openr(debugfile, NULL); |
eac9a434 RB |
1598 | if (!abfd) |
1599 | return -1; | |
1600 | ||
1601 | if (!bfd_check_format(abfd, bfd_object)) { | |
1602 | pr_debug2("%s: cannot read %s bfd file.\n", __func__, | |
1603 | dso->long_name); | |
1604 | goto out_close; | |
1605 | } | |
1606 | ||
1607 | if (bfd_get_flavour(abfd) == bfd_target_elf_flavour) | |
1608 | goto out_close; | |
1609 | ||
eac9a434 RB |
1610 | symbols_size = bfd_get_symtab_upper_bound(abfd); |
1611 | if (symbols_size == 0) { | |
1612 | bfd_close(abfd); | |
1613 | return 0; | |
1614 | } | |
1615 | ||
1616 | if (symbols_size < 0) | |
1617 | goto out_close; | |
1618 | ||
1619 | symbols = malloc(symbols_size); | |
1620 | if (!symbols) | |
1621 | goto out_close; | |
1622 | ||
1623 | symbols_count = bfd_canonicalize_symtab(abfd, symbols); | |
1624 | if (symbols_count < 0) | |
1625 | goto out_free; | |
1626 | ||
d2930ede RB |
1627 | section = bfd_get_section_by_name(abfd, ".text"); |
1628 | if (section) { | |
1629 | for (i = 0; i < symbols_count; ++i) { | |
1630 | if (!strcmp(bfd_asymbol_name(symbols[i]), "__ImageBase") || | |
1631 | !strcmp(bfd_asymbol_name(symbols[i]), "__image_base__")) | |
1632 | break; | |
1633 | } | |
1634 | if (i < symbols_count) { | |
1635 | /* PE symbols can only have 4 bytes, so use .text high bits */ | |
1636 | dso->text_offset = section->vma - (u32)section->vma; | |
1637 | dso->text_offset += (u32)bfd_asymbol_value(symbols[i]); | |
26a5262d | 1638 | dso->text_end = (section->vma - dso->text_offset) + section->size; |
d2930ede RB |
1639 | } else { |
1640 | dso->text_offset = section->vma - section->filepos; | |
26a5262d | 1641 | dso->text_end = section->filepos + section->size; |
d2930ede RB |
1642 | } |
1643 | } | |
1644 | ||
eac9a434 RB |
1645 | qsort(symbols, symbols_count, sizeof(asymbol *), bfd_symbols__cmpvalue); |
1646 | ||
1647 | #ifdef bfd_get_section | |
1648 | #define bfd_asymbol_section bfd_get_section | |
1649 | #endif | |
1650 | for (i = 0; i < symbols_count; ++i) { | |
1651 | sym = symbols[i]; | |
1652 | section = bfd_asymbol_section(sym); | |
1653 | if (bfd2elf_binding(sym) < 0) | |
1654 | continue; | |
1655 | ||
1656 | while (i + 1 < symbols_count && | |
1657 | bfd_asymbol_section(symbols[i + 1]) == section && | |
1658 | bfd2elf_binding(symbols[i + 1]) < 0) | |
1659 | i++; | |
1660 | ||
1661 | if (i + 1 < symbols_count && | |
1662 | bfd_asymbol_section(symbols[i + 1]) == section) | |
1663 | len = symbols[i + 1]->value - sym->value; | |
1664 | else | |
1665 | len = section->size - sym->value; | |
1666 | ||
1667 | start = bfd_asymbol_value(sym) - dso->text_offset; | |
1668 | symbol = symbol__new(start, len, bfd2elf_binding(sym), STT_FUNC, | |
1669 | bfd_asymbol_name(sym)); | |
1670 | if (!symbol) | |
1671 | goto out_free; | |
1672 | ||
1673 | symbols__insert(&dso->symbols, symbol); | |
1674 | } | |
1675 | #ifdef bfd_get_section | |
1676 | #undef bfd_asymbol_section | |
1677 | #endif | |
1678 | ||
838425f2 | 1679 | symbols__fixup_end(&dso->symbols, false); |
eac9a434 RB |
1680 | symbols__fixup_duplicate(&dso->symbols); |
1681 | dso->adjust_symbols = 1; | |
1682 | ||
1683 | err = 0; | |
1684 | out_free: | |
1685 | free(symbols); | |
1686 | out_close: | |
1687 | bfd_close(abfd); | |
1688 | return err; | |
1689 | } | |
1690 | #endif | |
1691 | ||
1029f9fe NK |
1692 | static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod, |
1693 | enum dso_binary_type type) | |
1694 | { | |
1695 | switch (type) { | |
1696 | case DSO_BINARY_TYPE__JAVA_JIT: | |
1697 | case DSO_BINARY_TYPE__DEBUGLINK: | |
1698 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
1699 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
1700 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
85afd355 | 1701 | case DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO: |
1029f9fe NK |
1702 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: |
1703 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: | |
1c695c88 | 1704 | return !kmod && dso->kernel == DSO_SPACE__USER; |
1029f9fe NK |
1705 | |
1706 | case DSO_BINARY_TYPE__KALLSYMS: | |
1707 | case DSO_BINARY_TYPE__VMLINUX: | |
1708 | case DSO_BINARY_TYPE__KCORE: | |
1c695c88 | 1709 | return dso->kernel == DSO_SPACE__KERNEL; |
1029f9fe NK |
1710 | |
1711 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
1712 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
1713 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
1c695c88 | 1714 | return dso->kernel == DSO_SPACE__KERNEL_GUEST; |
1029f9fe NK |
1715 | |
1716 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 1717 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
1029f9fe | 1718 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: |
c00c48fc | 1719 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
1029f9fe NK |
1720 | /* |
1721 | * kernel modules know their symtab type - it's set when | |
a94ab91a | 1722 | * creating a module dso in machine__addnew_module_map(). |
1029f9fe NK |
1723 | */ |
1724 | return kmod && dso->symtab_type == type; | |
1725 | ||
1726 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
d2396999 | 1727 | case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO: |
1029f9fe NK |
1728 | return true; |
1729 | ||
9b86d04d | 1730 | case DSO_BINARY_TYPE__BPF_PROG_INFO: |
3c29d448 | 1731 | case DSO_BINARY_TYPE__BPF_IMAGE: |
789e2419 | 1732 | case DSO_BINARY_TYPE__OOL: |
1029f9fe NK |
1733 | case DSO_BINARY_TYPE__NOT_FOUND: |
1734 | default: | |
1735 | return false; | |
1736 | } | |
1737 | } | |
1738 | ||
bf2e710b KJ |
1739 | /* Checks for the existence of the perf-<pid>.map file in two different |
1740 | * locations. First, if the process is a separate mount namespace, check in | |
1741 | * that namespace using the pid of the innermost pid namespace. If's not in a | |
1742 | * namespace, or the file can't be found there, try in the mount namespace of | |
1743 | * the tracing process using our view of its pid. | |
1744 | */ | |
1745 | static int dso__find_perf_map(char *filebuf, size_t bufsz, | |
1746 | struct nsinfo **nsip) | |
1747 | { | |
1748 | struct nscookie nsc; | |
1749 | struct nsinfo *nsi; | |
1750 | struct nsinfo *nnsi; | |
1751 | int rc = -1; | |
1752 | ||
1753 | nsi = *nsip; | |
1754 | ||
bcaf0a97 IR |
1755 | if (nsinfo__need_setns(nsi)) { |
1756 | snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nsinfo__nstgid(nsi)); | |
bf2e710b KJ |
1757 | nsinfo__mountns_enter(nsi, &nsc); |
1758 | rc = access(filebuf, R_OK); | |
1759 | nsinfo__mountns_exit(&nsc); | |
1760 | if (rc == 0) | |
1761 | return rc; | |
1762 | } | |
1763 | ||
1764 | nnsi = nsinfo__copy(nsi); | |
1765 | if (nnsi) { | |
1766 | nsinfo__put(nsi); | |
1767 | ||
bcaf0a97 IR |
1768 | nsinfo__clear_need_setns(nnsi); |
1769 | snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nsinfo__tgid(nnsi)); | |
bf2e710b KJ |
1770 | *nsip = nnsi; |
1771 | rc = 0; | |
1772 | } | |
1773 | ||
1774 | return rc; | |
1775 | } | |
1776 | ||
be39db9f | 1777 | int dso__load(struct dso *dso, struct map *map) |
a2928c42 | 1778 | { |
c338aee8 | 1779 | char *name; |
a2928c42 | 1780 | int ret = -1; |
44f24cb3 | 1781 | u_int i; |
93fcce96 | 1782 | struct machine *machine = NULL; |
44f24cb3 | 1783 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1784 | int ss_pos = 0; |
1785 | struct symsrc ss_[2]; | |
1786 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
1029f9fe | 1787 | bool kmod; |
bf2e710b | 1788 | bool perfmap; |
f766819c | 1789 | struct build_id bid; |
843ff37b | 1790 | struct nscookie nsc; |
bf2e710b KJ |
1791 | char newmapname[PATH_MAX]; |
1792 | const char *map_path = dso->long_name; | |
1793 | ||
e54dea69 | 1794 | mutex_lock(&dso->lock); |
bf2e710b KJ |
1795 | perfmap = strncmp(dso->name, "/tmp/perf-", 10) == 0; |
1796 | if (perfmap) { | |
1797 | if (dso->nsinfo && (dso__find_perf_map(newmapname, | |
1798 | sizeof(newmapname), &dso->nsinfo) == 0)) { | |
1799 | map_path = newmapname; | |
1800 | } | |
1801 | } | |
a2928c42 | 1802 | |
843ff37b | 1803 | nsinfo__mountns_enter(dso->nsinfo, &nsc); |
4a936edc NK |
1804 | |
1805 | /* check again under the dso->lock */ | |
3183f8ca | 1806 | if (dso__loaded(dso)) { |
4a936edc NK |
1807 | ret = 1; |
1808 | goto out; | |
1809 | } | |
66bd8424 | 1810 | |
b5c09518 ACM |
1811 | kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || |
1812 | dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || | |
1813 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE || | |
1814 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
1815 | ||
1816 | if (dso->kernel && !kmod) { | |
1c695c88 | 1817 | if (dso->kernel == DSO_SPACE__KERNEL) |
be39db9f | 1818 | ret = dso__load_kernel_sym(dso, map); |
1c695c88 | 1819 | else if (dso->kernel == DSO_SPACE__KERNEL_GUEST) |
be39db9f | 1820 | ret = dso__load_guest_kernel_sym(dso, map); |
4a936edc | 1821 | |
5ab6d715 | 1822 | machine = maps__machine(map__kmaps(map)); |
4d99e413 AH |
1823 | if (machine__is(machine, "x86_64")) |
1824 | machine__map_x86_64_entry_trampolines(machine, dso); | |
4a936edc NK |
1825 | goto out; |
1826 | } | |
a1645ce1 | 1827 | |
aeafcbaf | 1828 | dso->adjust_symbols = 0; |
f5812a7a | 1829 | |
bf2e710b | 1830 | if (perfmap) { |
3183f8ca | 1831 | ret = dso__load_perf_map(map_path, dso); |
44f24cb3 JO |
1832 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1833 | DSO_BINARY_TYPE__NOT_FOUND; | |
4a936edc | 1834 | goto out; |
94cb9e38 ACM |
1835 | } |
1836 | ||
44f24cb3 JO |
1837 | if (machine) |
1838 | root_dir = machine->root_dir; | |
1839 | ||
164c800e DA |
1840 | name = malloc(PATH_MAX); |
1841 | if (!name) | |
4a936edc | 1842 | goto out; |
164c800e | 1843 | |
5baecbcd DK |
1844 | /* |
1845 | * Read the build id if possible. This is required for | |
1846 | * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work | |
1847 | */ | |
ed6c166c | 1848 | if (!dso->has_build_id && |
9b200653 VK |
1849 | is_regular_file(dso->long_name)) { |
1850 | __symbol__join_symfs(name, PATH_MAX, dso->long_name); | |
f766819c | 1851 | if (filename__read_build_id(name, &bid) > 0) |
8dfdf440 | 1852 | dso__set_build_id(dso, &bid); |
9b200653 | 1853 | } |
5baecbcd | 1854 | |
1029f9fe NK |
1855 | /* |
1856 | * Iterate over candidate debug images. | |
3aafe5ae CS |
1857 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1858 | * and/or opd section) for processing. | |
6da80ce8 | 1859 | */ |
44f24cb3 | 1860 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1861 | struct symsrc *ss = &ss_[ss_pos]; |
1862 | bool next_slot = false; | |
f045b8c4 | 1863 | bool is_reg; |
d2396999 | 1864 | bool nsexit; |
eac9a434 | 1865 | int bfdrc = -1; |
c3962961 | 1866 | int sirc = -1; |
6da80ce8 | 1867 | |
005f9294 | 1868 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1869 | |
d2396999 KJ |
1870 | nsexit = (symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE || |
1871 | symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO); | |
1872 | ||
1029f9fe NK |
1873 | if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type)) |
1874 | continue; | |
1875 | ||
ee4e9625 ACM |
1876 | if (dso__read_binary_type_filename(dso, symtab_type, |
1877 | root_dir, name, PATH_MAX)) | |
44f24cb3 | 1878 | continue; |
6da80ce8 | 1879 | |
d2396999 | 1880 | if (nsexit) |
f045b8c4 KJ |
1881 | nsinfo__mountns_exit(&nsc); |
1882 | ||
1883 | is_reg = is_regular_file(name); | |
67fd1892 | 1884 | if (!is_reg && errno == ENOENT && dso->nsinfo) { |
7031edac | 1885 | char *new_name = dso__filename_with_chroot(dso, name); |
67fd1892 NK |
1886 | if (new_name) { |
1887 | is_reg = is_regular_file(new_name); | |
1888 | strlcpy(name, new_name, PATH_MAX); | |
1889 | free(new_name); | |
1890 | } | |
1891 | } | |
1892 | ||
eac9a434 | 1893 | #ifdef HAVE_LIBBFD_SUPPORT |
c3962961 | 1894 | if (is_reg) |
eac9a434 RB |
1895 | bfdrc = dso__load_bfd_symbols(dso, name); |
1896 | #endif | |
1897 | if (is_reg && bfdrc < 0) | |
c3962961 | 1898 | sirc = symsrc__init(ss, dso, name, symtab_type); |
40356721 | 1899 | |
d2396999 | 1900 | if (nsexit) |
f045b8c4 KJ |
1901 | nsinfo__mountns_enter(dso->nsinfo, &nsc); |
1902 | ||
77771a97 NF |
1903 | if (bfdrc == 0) { |
1904 | ret = 0; | |
eac9a434 | 1905 | break; |
77771a97 | 1906 | } |
eac9a434 | 1907 | |
c3962961 | 1908 | if (!is_reg || sirc < 0) |
6da80ce8 | 1909 | continue; |
a2928c42 | 1910 | |
3aafe5ae CS |
1911 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1912 | syms_ss = ss; | |
1913 | next_slot = true; | |
0058aef6 AH |
1914 | if (!dso->symsrc_filename) |
1915 | dso->symsrc_filename = strdup(name); | |
d26cd12b CS |
1916 | } |
1917 | ||
3aafe5ae CS |
1918 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1919 | runtime_ss = ss; | |
1920 | next_slot = true; | |
a44f605b | 1921 | } |
a2928c42 | 1922 | |
3aafe5ae CS |
1923 | if (next_slot) { |
1924 | ss_pos++; | |
33ff581e | 1925 | |
3aafe5ae CS |
1926 | if (syms_ss && runtime_ss) |
1927 | break; | |
98e9f03b NK |
1928 | } else { |
1929 | symsrc__destroy(ss); | |
6da80ce8 | 1930 | } |
3aafe5ae | 1931 | |
a25e46c4 | 1932 | } |
6da80ce8 | 1933 | |
3aafe5ae CS |
1934 | if (!runtime_ss && !syms_ss) |
1935 | goto out_free; | |
1936 | ||
1937 | if (runtime_ss && !syms_ss) { | |
1938 | syms_ss = runtime_ss; | |
1939 | } | |
1940 | ||
1941 | /* We'll have to hope for the best */ | |
1942 | if (!runtime_ss && syms_ss) | |
1943 | runtime_ss = syms_ss; | |
1944 | ||
1029f9fe | 1945 | if (syms_ss) |
be39db9f | 1946 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, kmod); |
1029f9fe | 1947 | else |
3aafe5ae CS |
1948 | ret = -1; |
1949 | ||
f47b58b7 | 1950 | if (ret > 0) { |
3aafe5ae CS |
1951 | int nr_plt; |
1952 | ||
3183f8ca | 1953 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss); |
3aafe5ae CS |
1954 | if (nr_plt > 0) |
1955 | ret += nr_plt; | |
60e4b10c ACM |
1956 | } |
1957 | ||
3aafe5ae CS |
1958 | for (; ss_pos > 0; ss_pos--) |
1959 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1960 | out_free: | |
a2928c42 | 1961 | free(name); |
aeafcbaf | 1962 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
4a936edc NK |
1963 | ret = 0; |
1964 | out: | |
3183f8ca | 1965 | dso__set_loaded(dso); |
d9a0d6b8 | 1966 | mutex_unlock(&dso->lock); |
843ff37b | 1967 | nsinfo__mountns_exit(&nsc); |
4a936edc | 1968 | |
a2928c42 ACM |
1969 | return ret; |
1970 | } | |
1971 | ||
aeafcbaf | 1972 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
be39db9f | 1973 | const char *vmlinux, bool vmlinux_allocated) |
a2928c42 | 1974 | { |
b68e2f91 CS |
1975 | int err = -1; |
1976 | struct symsrc ss; | |
ec5761ea | 1977 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1978 | enum dso_binary_type symtab_type; |
a2928c42 | 1979 | |
5698d2c9 NK |
1980 | if (vmlinux[0] == '/') |
1981 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1982 | else | |
972f393b | 1983 | symbol__join_symfs(symfs_vmlinux, vmlinux); |
a2928c42 | 1984 | |
1c695c88 | 1985 | if (dso->kernel == DSO_SPACE__KERNEL_GUEST) |
005f9294 | 1986 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1987 | else |
005f9294 | 1988 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1989 | |
005f9294 | 1990 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1991 | return -1; |
1992 | ||
e59fea47 AR |
1993 | /* |
1994 | * dso__load_sym() may copy 'dso' which will result in the copies having | |
1995 | * an incorrect long name unless we set it here first. | |
1996 | */ | |
1997 | dso__set_long_name(dso, vmlinux, vmlinux_allocated); | |
1998 | if (dso->kernel == DSO_SPACE__KERNEL_GUEST) | |
1999 | dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX; | |
2000 | else | |
2001 | dso->binary_type = DSO_BINARY_TYPE__VMLINUX; | |
2002 | ||
be39db9f | 2003 | err = dso__load_sym(dso, map, &ss, &ss, 0); |
b68e2f91 | 2004 | symsrc__destroy(&ss); |
a2928c42 | 2005 | |
515850e4 | 2006 | if (err > 0) { |
3183f8ca | 2007 | dso__set_loaded(dso); |
ec5761ea | 2008 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 2009 | } |
3846df2e | 2010 | |
a2928c42 ACM |
2011 | return err; |
2012 | } | |
2013 | ||
be39db9f | 2014 | int dso__load_vmlinux_path(struct dso *dso, struct map *map) |
a19afe46 ACM |
2015 | { |
2016 | int i, err = 0; | |
00dc8657 | 2017 | char *filename = NULL; |
a19afe46 | 2018 | |
dc38218e ACM |
2019 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", |
2020 | vmlinux_path__nr_entries + 1); | |
2021 | ||
2022 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
be39db9f | 2023 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], false); |
dc38218e ACM |
2024 | if (err > 0) |
2025 | goto out; | |
2026 | } | |
2027 | ||
00dc8657 | 2028 | if (!symbol_conf.ignore_vmlinux_buildid) |
d2396999 | 2029 | filename = dso__build_id_filename(dso, NULL, 0, false); |
5ad90e4e | 2030 | if (filename != NULL) { |
be39db9f | 2031 | err = dso__load_vmlinux(dso, map, filename, true); |
5230fb7d | 2032 | if (err > 0) |
5ad90e4e | 2033 | goto out; |
5ad90e4e ACM |
2034 | free(filename); |
2035 | } | |
5ad90e4e | 2036 | out: |
a19afe46 ACM |
2037 | return err; |
2038 | } | |
2039 | ||
c48903b8 MH |
2040 | static bool visible_dir_filter(const char *name, struct dirent *d) |
2041 | { | |
2042 | if (d->d_type != DT_DIR) | |
2043 | return false; | |
2044 | return lsdir_no_dot_filter(name, d); | |
2045 | } | |
2046 | ||
0544d422 AH |
2047 | static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz) |
2048 | { | |
2049 | char kallsyms_filename[PATH_MAX]; | |
0544d422 | 2050 | int ret = -1; |
c48903b8 MH |
2051 | struct strlist *dirs; |
2052 | struct str_node *nd; | |
0544d422 | 2053 | |
c48903b8 MH |
2054 | dirs = lsdir(dir, visible_dir_filter); |
2055 | if (!dirs) | |
0544d422 AH |
2056 | return -1; |
2057 | ||
602a1f4d | 2058 | strlist__for_each_entry(nd, dirs) { |
0544d422 | 2059 | scnprintf(kallsyms_filename, sizeof(kallsyms_filename), |
c48903b8 | 2060 | "%s/%s/kallsyms", dir, nd->s); |
a00d28cb | 2061 | if (!validate_kcore_addresses(kallsyms_filename, map)) { |
0544d422 AH |
2062 | strlcpy(dir, kallsyms_filename, dir_sz); |
2063 | ret = 0; | |
2064 | break; | |
2065 | } | |
2066 | } | |
2067 | ||
c48903b8 | 2068 | strlist__delete(dirs); |
0544d422 AH |
2069 | |
2070 | return ret; | |
2071 | } | |
2072 | ||
11870d71 MH |
2073 | /* |
2074 | * Use open(O_RDONLY) to check readability directly instead of access(R_OK) | |
2075 | * since access(R_OK) only checks with real UID/GID but open() use effective | |
2076 | * UID/GID and actual capabilities (e.g. /proc/kcore requires CAP_SYS_RAWIO). | |
2077 | */ | |
2078 | static bool filename__readable(const char *file) | |
2079 | { | |
2080 | int fd = open(file, O_RDONLY); | |
2081 | if (fd < 0) | |
2082 | return false; | |
2083 | close(fd); | |
2084 | return true; | |
2085 | } | |
2086 | ||
0544d422 AH |
2087 | static char *dso__find_kallsyms(struct dso *dso, struct map *map) |
2088 | { | |
3ff1b8c8 | 2089 | struct build_id bid; |
b5d8bbe8 | 2090 | char sbuild_id[SBUILD_ID_SIZE]; |
0544d422 AH |
2091 | bool is_host = false; |
2092 | char path[PATH_MAX]; | |
2093 | ||
2094 | if (!dso->has_build_id) { | |
2095 | /* | |
2096 | * Last resort, if we don't have a build-id and couldn't find | |
2097 | * any vmlinux file, try the running kernel kallsyms table. | |
2098 | */ | |
2099 | goto proc_kallsyms; | |
2100 | } | |
2101 | ||
3ff1b8c8 | 2102 | if (sysfs__read_build_id("/sys/kernel/notes", &bid) == 0) |
39be8d01 | 2103 | is_host = dso__build_id_equal(dso, &bid); |
0544d422 | 2104 | |
4e4b6c06 | 2105 | /* Try a fast path for /proc/kallsyms if possible */ |
0544d422 | 2106 | if (is_host) { |
0544d422 | 2107 | /* |
11870d71 MH |
2108 | * Do not check the build-id cache, unless we know we cannot use |
2109 | * /proc/kcore or module maps don't match to /proc/kallsyms. | |
2110 | * To check readability of /proc/kcore, do not use access(R_OK) | |
2111 | * since /proc/kcore requires CAP_SYS_RAWIO to read and access | |
2112 | * can't check it. | |
0544d422 | 2113 | */ |
11870d71 MH |
2114 | if (filename__readable("/proc/kcore") && |
2115 | !validate_kcore_addresses("/proc/kallsyms", map)) | |
2116 | goto proc_kallsyms; | |
0544d422 AH |
2117 | } |
2118 | ||
bf541169 | 2119 | build_id__sprintf(&dso->bid, sbuild_id); |
4e4b6c06 | 2120 | |
449867e3 | 2121 | /* Find kallsyms in build-id cache with kcore */ |
4e4b6c06 MH |
2122 | scnprintf(path, sizeof(path), "%s/%s/%s", |
2123 | buildid_dir, DSO__NAME_KCORE, sbuild_id); | |
2124 | ||
449867e3 AH |
2125 | if (!find_matching_kcore(map, path, sizeof(path))) |
2126 | return strdup(path); | |
2127 | ||
4e4b6c06 MH |
2128 | /* Use current /proc/kallsyms if possible */ |
2129 | if (is_host) { | |
2130 | proc_kallsyms: | |
2131 | return strdup("/proc/kallsyms"); | |
2132 | } | |
2133 | ||
2134 | /* Finally, find a cache of kallsyms */ | |
01412261 | 2135 | if (!build_id_cache__kallsyms_path(sbuild_id, path, sizeof(path))) { |
0544d422 AH |
2136 | pr_err("No kallsyms or vmlinux with build-id %s was found\n", |
2137 | sbuild_id); | |
2138 | return NULL; | |
2139 | } | |
2140 | ||
2141 | return strdup(path); | |
0544d422 AH |
2142 | } |
2143 | ||
be39db9f | 2144 | static int dso__load_kernel_sym(struct dso *dso, struct map *map) |
a827c875 | 2145 | { |
cc612d81 | 2146 | int err; |
9e201442 ACM |
2147 | const char *kallsyms_filename = NULL; |
2148 | char *kallsyms_allocated_filename = NULL; | |
ca8ea73a JO |
2149 | char *filename = NULL; |
2150 | ||
dc8d6ab2 | 2151 | /* |
b226a5a7 DA |
2152 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
2153 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
2154 | * |
2155 | * For instance, try to analyse an ARM perf.data file _without_ a | |
2156 | * build-id, or if the user specifies the wrong path to the right | |
2157 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
2158 | * x86_86 one, on the machine where analysis is being performed, say), | |
2159 | * or worse, /proc/kallsyms. | |
2160 | * | |
2161 | * If the specified file _has_ a build-id and there is a build-id | |
2162 | * section in the perf.data file, we will still do the expected | |
2163 | * validation in dso__load_vmlinux and will bail out if they don't | |
2164 | * match. | |
2165 | */ | |
b226a5a7 DA |
2166 | if (symbol_conf.kallsyms_name != NULL) { |
2167 | kallsyms_filename = symbol_conf.kallsyms_name; | |
2168 | goto do_kallsyms; | |
2169 | } | |
2170 | ||
fc2be696 | 2171 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
be39db9f | 2172 | return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, false); |
dc8d6ab2 | 2173 | } |
cc612d81 | 2174 | |
ca8ea73a JO |
2175 | /* |
2176 | * Before checking on common vmlinux locations, check if it's | |
2177 | * stored as standard build id binary (not kallsyms) under | |
2178 | * .debug cache. | |
2179 | */ | |
2180 | if (!symbol_conf.ignore_vmlinux_buildid) | |
2181 | filename = __dso__build_id_filename(dso, NULL, 0, false, false); | |
2182 | if (filename != NULL) { | |
2183 | err = dso__load_vmlinux(dso, map, filename, true); | |
2184 | if (err > 0) | |
2185 | return err; | |
2186 | free(filename); | |
2187 | } | |
2188 | ||
fc2be696 | 2189 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
be39db9f | 2190 | err = dso__load_vmlinux_path(dso, map); |
a19afe46 | 2191 | if (err > 0) |
39b12f78 | 2192 | return err; |
cc612d81 ACM |
2193 | } |
2194 | ||
ec5761ea DA |
2195 | /* do not try local files if a symfs was given */ |
2196 | if (symbol_conf.symfs[0] != 0) | |
2197 | return -1; | |
2198 | ||
0544d422 AH |
2199 | kallsyms_allocated_filename = dso__find_kallsyms(dso, map); |
2200 | if (!kallsyms_allocated_filename) | |
2201 | return -1; | |
19fc2ded | 2202 | |
0544d422 | 2203 | kallsyms_filename = kallsyms_allocated_filename; |
439d473b | 2204 | |
cc612d81 | 2205 | do_kallsyms: |
be39db9f | 2206 | err = dso__load_kallsyms(dso, kallsyms_filename, map); |
3846df2e ACM |
2207 | if (err > 0) |
2208 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 2209 | free(kallsyms_allocated_filename); |
439d473b | 2210 | |
8e0cf965 | 2211 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 2212 | dso->binary_type = DSO_BINARY_TYPE__KALLSYMS; |
0a77582f | 2213 | dso__set_long_name(dso, DSO__NAME_KALLSYMS, false); |
6a4694a4 ACM |
2214 | map__fixup_start(map); |
2215 | map__fixup_end(map); | |
439d473b | 2216 | } |
94cb9e38 | 2217 | |
a827c875 ACM |
2218 | return err; |
2219 | } | |
2220 | ||
be39db9f | 2221 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map) |
a1645ce1 ZY |
2222 | { |
2223 | int err; | |
a5367ecb | 2224 | const char *kallsyms_filename; |
5ab6d715 | 2225 | struct machine *machine = maps__machine(map__kmaps(map)); |
a1645ce1 ZY |
2226 | char path[PATH_MAX]; |
2227 | ||
a5367ecb AH |
2228 | if (machine->kallsyms_filename) { |
2229 | kallsyms_filename = machine->kallsyms_filename; | |
2230 | } else if (machine__is_default_guest(machine)) { | |
a1645ce1 ZY |
2231 | /* |
2232 | * if the user specified a vmlinux filename, use it and only | |
2233 | * it, reporting errors to the user if it cannot be used. | |
2234 | * Or use file guest_kallsyms inputted by user on commandline | |
2235 | */ | |
2236 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 2237 | err = dso__load_vmlinux(dso, map, |
5230fb7d | 2238 | symbol_conf.default_guest_vmlinux_name, |
be39db9f | 2239 | false); |
39b12f78 | 2240 | return err; |
a1645ce1 ZY |
2241 | } |
2242 | ||
2243 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
2244 | if (!kallsyms_filename) | |
2245 | return -1; | |
2246 | } else { | |
23346f21 | 2247 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
2248 | kallsyms_filename = path; |
2249 | } | |
2250 | ||
be39db9f | 2251 | err = dso__load_kallsyms(dso, kallsyms_filename, map); |
8e0cf965 | 2252 | if (err > 0) |
39b12f78 | 2253 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 2254 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 2255 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
8c7f1bb3 | 2256 | dso__set_long_name(dso, machine->mmap_name, false); |
a1645ce1 ZY |
2257 | map__fixup_start(map); |
2258 | map__fixup_end(map); | |
2259 | } | |
2260 | ||
2261 | return err; | |
2262 | } | |
cd84c2ac | 2263 | |
cc612d81 ACM |
2264 | static void vmlinux_path__exit(void) |
2265 | { | |
04662523 ACM |
2266 | while (--vmlinux_path__nr_entries >= 0) |
2267 | zfree(&vmlinux_path[vmlinux_path__nr_entries]); | |
c4f03547 | 2268 | vmlinux_path__nr_entries = 0; |
cc612d81 | 2269 | |
04662523 | 2270 | zfree(&vmlinux_path); |
cc612d81 ACM |
2271 | } |
2272 | ||
aac48647 ET |
2273 | static const char * const vmlinux_paths[] = { |
2274 | "vmlinux", | |
2275 | "/boot/vmlinux" | |
2276 | }; | |
2277 | ||
2278 | static const char * const vmlinux_paths_upd[] = { | |
2279 | "/boot/vmlinux-%s", | |
2280 | "/usr/lib/debug/boot/vmlinux-%s", | |
2281 | "/lib/modules/%s/build/vmlinux", | |
f55ae954 ET |
2282 | "/usr/lib/debug/lib/modules/%s/vmlinux", |
2283 | "/usr/lib/debug/boot/vmlinux-%s.debug" | |
aac48647 ET |
2284 | }; |
2285 | ||
2286 | static int vmlinux_path__add(const char *new_entry) | |
2287 | { | |
2288 | vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry); | |
2289 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2290 | return -1; | |
2291 | ++vmlinux_path__nr_entries; | |
2292 | ||
2293 | return 0; | |
2294 | } | |
2295 | ||
ce80d3be | 2296 | static int vmlinux_path__init(struct perf_env *env) |
cc612d81 ACM |
2297 | { |
2298 | struct utsname uts; | |
2299 | char bf[PATH_MAX]; | |
0a7e6d1b | 2300 | char *kernel_version; |
aac48647 | 2301 | unsigned int i; |
cc612d81 | 2302 | |
aac48647 ET |
2303 | vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) + |
2304 | ARRAY_SIZE(vmlinux_paths_upd))); | |
cc612d81 ACM |
2305 | if (vmlinux_path == NULL) |
2306 | return -1; | |
2307 | ||
aac48647 ET |
2308 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++) |
2309 | if (vmlinux_path__add(vmlinux_paths[i]) < 0) | |
2310 | goto out_fail; | |
ec5761ea | 2311 | |
0a7e6d1b | 2312 | /* only try kernel version if no symfs was given */ |
ec5761ea DA |
2313 | if (symbol_conf.symfs[0] != 0) |
2314 | return 0; | |
2315 | ||
0a7e6d1b NK |
2316 | if (env) { |
2317 | kernel_version = env->os_release; | |
2318 | } else { | |
2319 | if (uname(&uts) < 0) | |
2320 | goto out_fail; | |
2321 | ||
2322 | kernel_version = uts.release; | |
2323 | } | |
ec5761ea | 2324 | |
aac48647 ET |
2325 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) { |
2326 | snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version); | |
2327 | if (vmlinux_path__add(bf) < 0) | |
2328 | goto out_fail; | |
2329 | } | |
cc612d81 ACM |
2330 | |
2331 | return 0; | |
2332 | ||
2333 | out_fail: | |
2334 | vmlinux_path__exit(); | |
2335 | return -1; | |
2336 | } | |
2337 | ||
3bfe5f81 | 2338 | int setup_list(struct strlist **list, const char *list_str, |
655000e7 ACM |
2339 | const char *list_name) |
2340 | { | |
2341 | if (list_str == NULL) | |
2342 | return 0; | |
2343 | ||
4a77e218 | 2344 | *list = strlist__new(list_str, NULL); |
655000e7 ACM |
2345 | if (!*list) { |
2346 | pr_err("problems parsing %s list\n", list_name); | |
2347 | return -1; | |
2348 | } | |
0bc2f2f7 ACM |
2349 | |
2350 | symbol_conf.has_filter = true; | |
655000e7 ACM |
2351 | return 0; |
2352 | } | |
2353 | ||
e03eaa40 DA |
2354 | int setup_intlist(struct intlist **list, const char *list_str, |
2355 | const char *list_name) | |
2356 | { | |
2357 | if (list_str == NULL) | |
2358 | return 0; | |
2359 | ||
2360 | *list = intlist__new(list_str); | |
2361 | if (!*list) { | |
2362 | pr_err("problems parsing %s list\n", list_name); | |
2363 | return -1; | |
2364 | } | |
2365 | return 0; | |
2366 | } | |
2367 | ||
61d9fc44 JY |
2368 | static int setup_addrlist(struct intlist **addr_list, struct strlist *sym_list) |
2369 | { | |
2370 | struct str_node *pos, *tmp; | |
2371 | unsigned long val; | |
2372 | char *sep; | |
2373 | const char *end; | |
2374 | int i = 0, err; | |
2375 | ||
2376 | *addr_list = intlist__new(NULL); | |
2377 | if (!*addr_list) | |
2378 | return -1; | |
2379 | ||
2380 | strlist__for_each_entry_safe(pos, tmp, sym_list) { | |
2381 | errno = 0; | |
2382 | val = strtoul(pos->s, &sep, 16); | |
2383 | if (errno || (sep == pos->s)) | |
2384 | continue; | |
2385 | ||
2386 | if (*sep != '\0') { | |
2387 | end = pos->s + strlen(pos->s) - 1; | |
2388 | while (end >= sep && isspace(*end)) | |
2389 | end--; | |
2390 | ||
2391 | if (end >= sep) | |
2392 | continue; | |
2393 | } | |
2394 | ||
2395 | err = intlist__add(*addr_list, val); | |
2396 | if (err) | |
2397 | break; | |
2398 | ||
2399 | strlist__remove(sym_list, pos); | |
2400 | i++; | |
2401 | } | |
2402 | ||
2403 | if (i == 0) { | |
2404 | intlist__delete(*addr_list); | |
2405 | *addr_list = NULL; | |
2406 | } | |
2407 | ||
2408 | return 0; | |
2409 | } | |
2410 | ||
ec80fde7 ACM |
2411 | static bool symbol__read_kptr_restrict(void) |
2412 | { | |
2413 | bool value = false; | |
38272dc4 | 2414 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); |
ec80fde7 | 2415 | |
38272dc4 WN |
2416 | if (fp != NULL) { |
2417 | char line[8]; | |
ec80fde7 | 2418 | |
38272dc4 | 2419 | if (fgets(line, sizeof(line), fp) != NULL) |
8859aede IL |
2420 | value = perf_cap__capable(CAP_SYSLOG) ? |
2421 | (atoi(line) >= 2) : | |
2422 | (atoi(line) != 0); | |
ec80fde7 | 2423 | |
38272dc4 | 2424 | fclose(fp); |
ec80fde7 ACM |
2425 | } |
2426 | ||
8859aede IL |
2427 | /* Per kernel/kallsyms.c: |
2428 | * we also restrict when perf_event_paranoid > 1 w/o CAP_SYSLOG | |
2429 | */ | |
2430 | if (perf_event_paranoid() > 1 && !perf_cap__capable(CAP_SYSLOG)) | |
2431 | value = true; | |
2432 | ||
ec80fde7 ACM |
2433 | return value; |
2434 | } | |
2435 | ||
b01141f4 ACM |
2436 | int symbol__annotation_init(void) |
2437 | { | |
7b366142 ACM |
2438 | if (symbol_conf.init_annotation) |
2439 | return 0; | |
2440 | ||
b01141f4 ACM |
2441 | if (symbol_conf.initialized) { |
2442 | pr_err("Annotation needs to be init before symbol__init()\n"); | |
2443 | return -1; | |
2444 | } | |
2445 | ||
b01141f4 ACM |
2446 | symbol_conf.priv_size += sizeof(struct annotation); |
2447 | symbol_conf.init_annotation = true; | |
2448 | return 0; | |
2449 | } | |
2450 | ||
ce80d3be | 2451 | int symbol__init(struct perf_env *env) |
2446042c | 2452 | { |
ec5761ea DA |
2453 | const char *symfs; |
2454 | ||
85e00b55 JZ |
2455 | if (symbol_conf.initialized) |
2456 | return 0; | |
2457 | ||
9ac3e487 | 2458 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 2459 | |
166ccc9c NK |
2460 | symbol__elf_init(); |
2461 | ||
0a7e6d1b | 2462 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0) |
2446042c ACM |
2463 | return -1; |
2464 | ||
c410a338 ACM |
2465 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2466 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2467 | return -1; | |
2468 | } | |
2469 | ||
655000e7 ACM |
2470 | if (setup_list(&symbol_conf.dso_list, |
2471 | symbol_conf.dso_list_str, "dso") < 0) | |
2472 | return -1; | |
2473 | ||
2474 | if (setup_list(&symbol_conf.comm_list, | |
2475 | symbol_conf.comm_list_str, "comm") < 0) | |
2476 | goto out_free_dso_list; | |
2477 | ||
e03eaa40 DA |
2478 | if (setup_intlist(&symbol_conf.pid_list, |
2479 | symbol_conf.pid_list_str, "pid") < 0) | |
2480 | goto out_free_comm_list; | |
2481 | ||
2482 | if (setup_intlist(&symbol_conf.tid_list, | |
2483 | symbol_conf.tid_list_str, "tid") < 0) | |
2484 | goto out_free_pid_list; | |
2485 | ||
655000e7 ACM |
2486 | if (setup_list(&symbol_conf.sym_list, |
2487 | symbol_conf.sym_list_str, "symbol") < 0) | |
e03eaa40 | 2488 | goto out_free_tid_list; |
655000e7 | 2489 | |
61d9fc44 JY |
2490 | if (symbol_conf.sym_list && |
2491 | setup_addrlist(&symbol_conf.addr_list, symbol_conf.sym_list) < 0) | |
2492 | goto out_free_sym_list; | |
2493 | ||
64eff7d9 DA |
2494 | if (setup_list(&symbol_conf.bt_stop_list, |
2495 | symbol_conf.bt_stop_list_str, "symbol") < 0) | |
2496 | goto out_free_sym_list; | |
2497 | ||
ec5761ea DA |
2498 | /* |
2499 | * A path to symbols of "/" is identical to "" | |
2500 | * reset here for simplicity. | |
2501 | */ | |
2502 | symfs = realpath(symbol_conf.symfs, NULL); | |
2503 | if (symfs == NULL) | |
2504 | symfs = symbol_conf.symfs; | |
2505 | if (strcmp(symfs, "/") == 0) | |
2506 | symbol_conf.symfs = ""; | |
2507 | if (symfs != symbol_conf.symfs) | |
2508 | free((void *)symfs); | |
2509 | ||
ec80fde7 ACM |
2510 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2511 | ||
85e00b55 | 2512 | symbol_conf.initialized = true; |
4aa65636 | 2513 | return 0; |
655000e7 | 2514 | |
64eff7d9 DA |
2515 | out_free_sym_list: |
2516 | strlist__delete(symbol_conf.sym_list); | |
61d9fc44 | 2517 | intlist__delete(symbol_conf.addr_list); |
e03eaa40 DA |
2518 | out_free_tid_list: |
2519 | intlist__delete(symbol_conf.tid_list); | |
2520 | out_free_pid_list: | |
2521 | intlist__delete(symbol_conf.pid_list); | |
655000e7 ACM |
2522 | out_free_comm_list: |
2523 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
2524 | out_free_dso_list: |
2525 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 2526 | return -1; |
4aa65636 ACM |
2527 | } |
2528 | ||
d65a458b ACM |
2529 | void symbol__exit(void) |
2530 | { | |
85e00b55 JZ |
2531 | if (!symbol_conf.initialized) |
2532 | return; | |
64eff7d9 | 2533 | strlist__delete(symbol_conf.bt_stop_list); |
d65a458b ACM |
2534 | strlist__delete(symbol_conf.sym_list); |
2535 | strlist__delete(symbol_conf.dso_list); | |
2536 | strlist__delete(symbol_conf.comm_list); | |
e03eaa40 DA |
2537 | intlist__delete(symbol_conf.tid_list); |
2538 | intlist__delete(symbol_conf.pid_list); | |
61d9fc44 | 2539 | intlist__delete(symbol_conf.addr_list); |
d65a458b ACM |
2540 | vmlinux_path__exit(); |
2541 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
64eff7d9 | 2542 | symbol_conf.bt_stop_list = NULL; |
85e00b55 | 2543 | symbol_conf.initialized = false; |
d65a458b | 2544 | } |
a7066709 HK |
2545 | |
2546 | int symbol__config_symfs(const struct option *opt __maybe_unused, | |
2547 | const char *dir, int unset __maybe_unused) | |
2548 | { | |
2549 | char *bf = NULL; | |
2550 | int ret; | |
2551 | ||
2552 | symbol_conf.symfs = strdup(dir); | |
2553 | if (symbol_conf.symfs == NULL) | |
2554 | return -ENOMEM; | |
2555 | ||
2556 | /* skip the locally configured cache if a symfs is given, and | |
2557 | * config buildid dir to symfs/.debug | |
2558 | */ | |
2559 | ret = asprintf(&bf, "%s/%s", dir, ".debug"); | |
2560 | if (ret < 0) | |
2561 | return -ENOMEM; | |
2562 | ||
2563 | set_buildid_dir(bf); | |
2564 | ||
2565 | free(bf); | |
2566 | return 0; | |
2567 | } | |
9f87498f JO |
2568 | |
2569 | struct mem_info *mem_info__get(struct mem_info *mi) | |
2570 | { | |
2571 | if (mi) | |
2572 | refcount_inc(&mi->refcnt); | |
2573 | return mi; | |
2574 | } | |
2575 | ||
2576 | void mem_info__put(struct mem_info *mi) | |
2577 | { | |
56e144fe IR |
2578 | if (mi && refcount_dec_and_test(&mi->refcnt)) { |
2579 | addr_map_symbol__exit(&mi->iaddr); | |
2580 | addr_map_symbol__exit(&mi->daddr); | |
9f87498f | 2581 | free(mi); |
56e144fe | 2582 | } |
9f87498f JO |
2583 | } |
2584 | ||
2585 | struct mem_info *mem_info__new(void) | |
2586 | { | |
2587 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
2588 | ||
2589 | if (mi) | |
2590 | refcount_set(&mi->refcnt, 1); | |
2591 | return mi; | |
2592 | } | |
a3df50ab JC |
2593 | |
2594 | /* | |
2595 | * Checks that user supplied symbol kernel files are accessible because | |
2596 | * the default mechanism for accessing elf files fails silently. i.e. if | |
2597 | * debug syms for a build ID aren't found perf carries on normally. When | |
2598 | * they are user supplied we should assume that the user doesn't want to | |
2599 | * silently fail. | |
2600 | */ | |
2601 | int symbol__validate_sym_arguments(void) | |
2602 | { | |
2603 | if (symbol_conf.vmlinux_name && | |
2604 | access(symbol_conf.vmlinux_name, R_OK)) { | |
2605 | pr_err("Invalid file: %s\n", symbol_conf.vmlinux_name); | |
2606 | return -EINVAL; | |
2607 | } | |
2608 | if (symbol_conf.kallsyms_name && | |
2609 | access(symbol_conf.kallsyms_name, R_OK)) { | |
2610 | pr_err("Invalid file: %s\n", symbol_conf.kallsyms_name); | |
2611 | return -EINVAL; | |
2612 | } | |
2613 | return 0; | |
2614 | } |