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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> | |
877a7a11 | 7 | #include <linux/kernel.h> |
5aab621b ACM |
8 | #include <sys/types.h> |
9 | #include <sys/stat.h> | |
10 | #include <sys/param.h> | |
11 | #include <fcntl.h> | |
12 | #include <unistd.h> | |
9486aa38 | 13 | #include <inttypes.h> |
b01141f4 | 14 | #include "annotate.h" |
b36f19d5 | 15 | #include "build-id.h" |
e334c726 | 16 | #include "util.h" |
8a6c5b26 | 17 | #include "debug.h" |
69d2591a | 18 | #include "machine.h" |
a2928c42 | 19 | #include "symbol.h" |
5aab621b | 20 | #include "strlist.h" |
e03eaa40 | 21 | #include "intlist.h" |
843ff37b | 22 | #include "namespaces.h" |
0a7e6d1b | 23 | #include "header.h" |
9a3993d4 | 24 | #include "path.h" |
3d689ed6 | 25 | #include "sane_ctype.h" |
a2928c42 | 26 | |
a2928c42 | 27 | #include <elf.h> |
f1617b40 | 28 | #include <limits.h> |
c506c96b | 29 | #include <symbol/kallsyms.h> |
439d473b | 30 | #include <sys/utsname.h> |
2cdbc46d | 31 | |
be39db9f ACM |
32 | static int dso__load_kernel_sym(struct dso *dso, struct map *map); |
33 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map); | |
608c34de ACM |
34 | static bool symbol__is_idle(const char *name); |
35 | ||
3f067dca ACM |
36 | int vmlinux_path__nr_entries; |
37 | char **vmlinux_path; | |
439d473b | 38 | |
75be6cf4 | 39 | struct symbol_conf symbol_conf = { |
e511db5e NK |
40 | .use_modules = true, |
41 | .try_vmlinux_path = true, | |
42 | .annotate_src = true, | |
43 | .demangle = true, | |
763122ad | 44 | .demangle_kernel = false, |
e511db5e | 45 | .cumulate_callchain = true, |
c8302367 | 46 | .show_hist_headers = true, |
e511db5e | 47 | .symfs = "", |
1e9abf8b | 48 | .event_group = true, |
d8a88dd2 | 49 | .inline_name = true, |
b32d133a ACM |
50 | }; |
51 | ||
44f24cb3 JO |
52 | static enum dso_binary_type binary_type_symtab[] = { |
53 | DSO_BINARY_TYPE__KALLSYMS, | |
54 | DSO_BINARY_TYPE__GUEST_KALLSYMS, | |
55 | DSO_BINARY_TYPE__JAVA_JIT, | |
56 | DSO_BINARY_TYPE__DEBUGLINK, | |
57 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
d2396999 | 58 | DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO, |
44f24cb3 JO |
59 | DSO_BINARY_TYPE__FEDORA_DEBUGINFO, |
60 | DSO_BINARY_TYPE__UBUNTU_DEBUGINFO, | |
61 | DSO_BINARY_TYPE__BUILDID_DEBUGINFO, | |
62 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
63 | DSO_BINARY_TYPE__GUEST_KMODULE, | |
c00c48fc | 64 | DSO_BINARY_TYPE__GUEST_KMODULE_COMP, |
44f24cb3 | 65 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE, |
c00c48fc | 66 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP, |
9cd00941 | 67 | DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO, |
44f24cb3 JO |
68 | DSO_BINARY_TYPE__NOT_FOUND, |
69 | }; | |
70 | ||
028df767 | 71 | #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab) |
44f24cb3 | 72 | |
a2f1c160 | 73 | static bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee | 74 | { |
31877908 AB |
75 | symbol_type = toupper(symbol_type); |
76 | ||
6893d4ee ACM |
77 | switch (map_type) { |
78 | case MAP__FUNCTION: | |
79 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 | 80 | case MAP__VARIABLE: |
31877908 | 81 | return symbol_type == 'D'; |
6893d4ee ACM |
82 | default: |
83 | return false; | |
84 | } | |
85 | } | |
86 | ||
694bf407 AB |
87 | static int prefix_underscores_count(const char *str) |
88 | { | |
89 | const char *tail = str; | |
90 | ||
91 | while (*tail == '_') | |
92 | tail++; | |
93 | ||
94 | return tail - str; | |
95 | } | |
96 | ||
4b3a2716 MH |
97 | const char * __weak arch__normalize_symbol_name(const char *name) |
98 | { | |
99 | return name; | |
100 | } | |
101 | ||
d8040645 PC |
102 | int __weak arch__compare_symbol_names(const char *namea, const char *nameb) |
103 | { | |
104 | return strcmp(namea, nameb); | |
105 | } | |
106 | ||
107 | int __weak arch__compare_symbol_names_n(const char *namea, const char *nameb, | |
108 | unsigned int n) | |
109 | { | |
110 | return strncmp(namea, nameb, n); | |
111 | } | |
112 | ||
fb6d5942 NR |
113 | int __weak arch__choose_best_symbol(struct symbol *syma, |
114 | struct symbol *symb __maybe_unused) | |
115 | { | |
116 | /* Avoid "SyS" kernel syscall aliases */ | |
117 | if (strlen(syma->name) >= 3 && !strncmp(syma->name, "SyS", 3)) | |
118 | return SYMBOL_B; | |
119 | if (strlen(syma->name) >= 10 && !strncmp(syma->name, "compat_SyS", 10)) | |
120 | return SYMBOL_B; | |
121 | ||
122 | return SYMBOL_A; | |
123 | } | |
694bf407 AB |
124 | |
125 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
126 | { | |
127 | s64 a; | |
128 | s64 b; | |
3445432b | 129 | size_t na, nb; |
694bf407 AB |
130 | |
131 | /* Prefer a symbol with non zero length */ | |
132 | a = syma->end - syma->start; | |
133 | b = symb->end - symb->start; | |
134 | if ((b == 0) && (a > 0)) | |
135 | return SYMBOL_A; | |
136 | else if ((a == 0) && (b > 0)) | |
137 | return SYMBOL_B; | |
138 | ||
139 | /* Prefer a non weak symbol over a weak one */ | |
140 | a = syma->binding == STB_WEAK; | |
141 | b = symb->binding == STB_WEAK; | |
142 | if (b && !a) | |
143 | return SYMBOL_A; | |
144 | if (a && !b) | |
145 | return SYMBOL_B; | |
146 | ||
147 | /* Prefer a global symbol over a non global one */ | |
148 | a = syma->binding == STB_GLOBAL; | |
149 | b = symb->binding == STB_GLOBAL; | |
150 | if (a && !b) | |
151 | return SYMBOL_A; | |
152 | if (b && !a) | |
153 | return SYMBOL_B; | |
154 | ||
155 | /* Prefer a symbol with less underscores */ | |
156 | a = prefix_underscores_count(syma->name); | |
157 | b = prefix_underscores_count(symb->name); | |
158 | if (b > a) | |
159 | return SYMBOL_A; | |
160 | else if (a > b) | |
161 | return SYMBOL_B; | |
162 | ||
3445432b AH |
163 | /* Choose the symbol with the longest name */ |
164 | na = strlen(syma->name); | |
165 | nb = strlen(symb->name); | |
166 | if (na > nb) | |
694bf407 | 167 | return SYMBOL_A; |
3445432b | 168 | else if (na < nb) |
694bf407 | 169 | return SYMBOL_B; |
3445432b | 170 | |
fb6d5942 | 171 | return arch__choose_best_symbol(syma, symb); |
694bf407 AB |
172 | } |
173 | ||
e5a1845f | 174 | void symbols__fixup_duplicate(struct rb_root *symbols) |
694bf407 AB |
175 | { |
176 | struct rb_node *nd; | |
177 | struct symbol *curr, *next; | |
178 | ||
c97b40e4 ACM |
179 | if (symbol_conf.allow_aliases) |
180 | return; | |
181 | ||
694bf407 AB |
182 | nd = rb_first(symbols); |
183 | ||
184 | while (nd) { | |
185 | curr = rb_entry(nd, struct symbol, rb_node); | |
186 | again: | |
187 | nd = rb_next(&curr->rb_node); | |
188 | next = rb_entry(nd, struct symbol, rb_node); | |
189 | ||
190 | if (!nd) | |
191 | break; | |
192 | ||
193 | if (curr->start != next->start) | |
194 | continue; | |
195 | ||
196 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
197 | rb_erase(&next->rb_node, symbols); | |
d4f74eb8 | 198 | symbol__delete(next); |
694bf407 AB |
199 | goto again; |
200 | } else { | |
201 | nd = rb_next(&curr->rb_node); | |
202 | rb_erase(&curr->rb_node, symbols); | |
d4f74eb8 | 203 | symbol__delete(curr); |
694bf407 AB |
204 | } |
205 | } | |
206 | } | |
207 | ||
e5a1845f | 208 | void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 209 | { |
aeafcbaf | 210 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 211 | struct symbol *curr, *prev; |
af427bf5 ACM |
212 | |
213 | if (prevnd == NULL) | |
214 | return; | |
215 | ||
2e538c4a ACM |
216 | curr = rb_entry(prevnd, struct symbol, rb_node); |
217 | ||
af427bf5 | 218 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
219 | prev = curr; |
220 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 221 | |
3b01a413 | 222 | if (prev->end == prev->start && prev->end != curr->start) |
2c241bd3 | 223 | prev->end = curr->start; |
af427bf5 | 224 | } |
2e538c4a ACM |
225 | |
226 | /* Last entry */ | |
227 | if (curr->end == curr->start) | |
e7ede72a | 228 | curr->end = roundup(curr->start, 4096) + 4096; |
af427bf5 ACM |
229 | } |
230 | ||
e5a1845f | 231 | void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 | 232 | { |
1eee78ae | 233 | struct maps *maps = &mg->maps[type]; |
4bb7123d | 234 | struct map *next, *curr; |
af427bf5 | 235 | |
0a7c74ea | 236 | down_write(&maps->lock); |
6a2ffcdd | 237 | |
4bb7123d ACM |
238 | curr = maps__first(maps); |
239 | if (curr == NULL) | |
6a2ffcdd | 240 | goto out_unlock; |
af427bf5 | 241 | |
4bb7123d | 242 | for (next = map__next(curr); next; next = map__next(curr)) { |
9ad4652b TR |
243 | if (!curr->end) |
244 | curr->end = next->start; | |
4bb7123d | 245 | curr = next; |
2e538c4a | 246 | } |
90c83218 ACM |
247 | |
248 | /* | |
249 | * We still haven't the actual symbols, so guess the | |
250 | * last map final address. | |
251 | */ | |
9ad4652b TR |
252 | if (!curr->end) |
253 | curr->end = ~0ULL; | |
6a2ffcdd ACM |
254 | |
255 | out_unlock: | |
0a7c74ea | 256 | up_write(&maps->lock); |
af427bf5 ACM |
257 | } |
258 | ||
e5a1845f | 259 | struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name) |
a2928c42 | 260 | { |
0085c954 | 261 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
262 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
263 | sizeof(*sym) + namelen)); | |
264 | if (sym == NULL) | |
0b73da3f IM |
265 | return NULL; |
266 | ||
b01141f4 ACM |
267 | if (symbol_conf.priv_size) { |
268 | if (symbol_conf.init_annotation) { | |
269 | struct annotation *notes = (void *)sym; | |
270 | pthread_mutex_init(¬es->lock, NULL); | |
271 | } | |
aeafcbaf | 272 | sym = ((void *)sym) + symbol_conf.priv_size; |
b01141f4 | 273 | } |
e4204992 | 274 | |
aeafcbaf | 275 | sym->start = start; |
2c241bd3 | 276 | sym->end = len ? start + len : start; |
aeafcbaf ACM |
277 | sym->binding = binding; |
278 | sym->namelen = namelen - 1; | |
e4204992 | 279 | |
aeafcbaf ACM |
280 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
281 | __func__, name, start, sym->end); | |
282 | memcpy(sym->name, name, namelen); | |
a2928c42 | 283 | |
aeafcbaf | 284 | return sym; |
a2928c42 ACM |
285 | } |
286 | ||
aeafcbaf | 287 | void symbol__delete(struct symbol *sym) |
a2928c42 | 288 | { |
aeafcbaf | 289 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
290 | } |
291 | ||
cdd059d7 | 292 | void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
293 | { |
294 | struct symbol *pos; | |
aeafcbaf | 295 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
296 | |
297 | while (next) { | |
298 | pos = rb_entry(next, struct symbol, rb_node); | |
299 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 300 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 301 | symbol__delete(pos); |
a2928c42 ACM |
302 | } |
303 | } | |
304 | ||
608c34de | 305 | void __symbols__insert(struct rb_root *symbols, struct symbol *sym, bool kernel) |
a2928c42 | 306 | { |
aeafcbaf | 307 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 308 | struct rb_node *parent = NULL; |
9cffa8d5 | 309 | const u64 ip = sym->start; |
a2928c42 ACM |
310 | struct symbol *s; |
311 | ||
608c34de ACM |
312 | if (kernel) { |
313 | const char *name = sym->name; | |
314 | /* | |
315 | * ppc64 uses function descriptors and appends a '.' to the | |
316 | * start of every instruction address. Remove it. | |
317 | */ | |
318 | if (name[0] == '.') | |
319 | name++; | |
320 | sym->idle = symbol__is_idle(name); | |
321 | } | |
322 | ||
a2928c42 ACM |
323 | while (*p != NULL) { |
324 | parent = *p; | |
325 | s = rb_entry(parent, struct symbol, rb_node); | |
326 | if (ip < s->start) | |
327 | p = &(*p)->rb_left; | |
328 | else | |
329 | p = &(*p)->rb_right; | |
330 | } | |
331 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 332 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
333 | } |
334 | ||
608c34de ACM |
335 | void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
336 | { | |
337 | __symbols__insert(symbols, sym, false); | |
338 | } | |
339 | ||
aeafcbaf | 340 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
341 | { |
342 | struct rb_node *n; | |
343 | ||
aeafcbaf | 344 | if (symbols == NULL) |
a2928c42 ACM |
345 | return NULL; |
346 | ||
aeafcbaf | 347 | n = symbols->rb_node; |
a2928c42 ACM |
348 | |
349 | while (n) { | |
350 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
351 | ||
352 | if (ip < s->start) | |
353 | n = n->rb_left; | |
9c7b37cd | 354 | else if (ip > s->end || (ip == s->end && ip != s->start)) |
a2928c42 ACM |
355 | n = n->rb_right; |
356 | else | |
357 | return s; | |
358 | } | |
359 | ||
360 | return NULL; | |
361 | } | |
362 | ||
8e0cf965 AH |
363 | static struct symbol *symbols__first(struct rb_root *symbols) |
364 | { | |
365 | struct rb_node *n = rb_first(symbols); | |
366 | ||
367 | if (n) | |
368 | return rb_entry(n, struct symbol, rb_node); | |
369 | ||
370 | return NULL; | |
371 | } | |
372 | ||
cd67f99f AH |
373 | static struct symbol *symbols__last(struct rb_root *symbols) |
374 | { | |
375 | struct rb_node *n = rb_last(symbols); | |
376 | ||
377 | if (n) | |
378 | return rb_entry(n, struct symbol, rb_node); | |
379 | ||
380 | return NULL; | |
381 | } | |
382 | ||
9c00a81b AH |
383 | static struct symbol *symbols__next(struct symbol *sym) |
384 | { | |
385 | struct rb_node *n = rb_next(&sym->rb_node); | |
386 | ||
387 | if (n) | |
388 | return rb_entry(n, struct symbol, rb_node); | |
389 | ||
390 | return NULL; | |
391 | } | |
392 | ||
aeafcbaf | 393 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 394 | { |
aeafcbaf | 395 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 396 | struct rb_node *parent = NULL; |
02a9d037 RV |
397 | struct symbol_name_rb_node *symn, *s; |
398 | ||
399 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
400 | |
401 | while (*p != NULL) { | |
402 | parent = *p; | |
403 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
404 | if (strcmp(sym->name, s->sym.name) < 0) | |
405 | p = &(*p)->rb_left; | |
406 | else | |
407 | p = &(*p)->rb_right; | |
408 | } | |
409 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 410 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
411 | } |
412 | ||
aeafcbaf ACM |
413 | static void symbols__sort_by_name(struct rb_root *symbols, |
414 | struct rb_root *source) | |
79406cd7 ACM |
415 | { |
416 | struct rb_node *nd; | |
417 | ||
418 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
419 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 420 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
421 | } |
422 | } | |
423 | ||
d8040645 PC |
424 | int symbol__match_symbol_name(const char *name, const char *str, |
425 | enum symbol_tag_include includes) | |
426 | { | |
427 | const char *versioning; | |
428 | ||
429 | if (includes == SYMBOL_TAG_INCLUDE__DEFAULT_ONLY && | |
430 | (versioning = strstr(name, "@@"))) { | |
431 | int len = strlen(str); | |
432 | ||
433 | if (len < versioning - name) | |
434 | len = versioning - name; | |
435 | ||
436 | return arch__compare_symbol_names_n(name, str, len); | |
437 | } else | |
438 | return arch__compare_symbol_names(name, str); | |
439 | } | |
440 | ||
aeafcbaf | 441 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
d8040645 PC |
442 | const char *name, |
443 | enum symbol_tag_include includes) | |
79406cd7 ACM |
444 | { |
445 | struct rb_node *n; | |
5bcaaca3 | 446 | struct symbol_name_rb_node *s = NULL; |
79406cd7 | 447 | |
aeafcbaf | 448 | if (symbols == NULL) |
79406cd7 ACM |
449 | return NULL; |
450 | ||
aeafcbaf | 451 | n = symbols->rb_node; |
79406cd7 ACM |
452 | |
453 | while (n) { | |
79406cd7 ACM |
454 | int cmp; |
455 | ||
456 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
d8040645 | 457 | cmp = symbol__match_symbol_name(s->sym.name, name, includes); |
79406cd7 | 458 | |
d8040645 | 459 | if (cmp > 0) |
79406cd7 | 460 | n = n->rb_left; |
d8040645 | 461 | else if (cmp < 0) |
79406cd7 ACM |
462 | n = n->rb_right; |
463 | else | |
de480999 | 464 | break; |
79406cd7 ACM |
465 | } |
466 | ||
de480999 NK |
467 | if (n == NULL) |
468 | return NULL; | |
469 | ||
d8040645 PC |
470 | if (includes != SYMBOL_TAG_INCLUDE__DEFAULT_ONLY) |
471 | /* return first symbol that has same name (if any) */ | |
472 | for (n = rb_prev(n); n; n = rb_prev(n)) { | |
473 | struct symbol_name_rb_node *tmp; | |
de480999 | 474 | |
d8040645 PC |
475 | tmp = rb_entry(n, struct symbol_name_rb_node, rb_node); |
476 | if (arch__compare_symbol_names(tmp->sym.name, s->sym.name)) | |
477 | break; | |
de480999 | 478 | |
d8040645 PC |
479 | s = tmp; |
480 | } | |
de480999 NK |
481 | |
482 | return &s->sym; | |
79406cd7 ACM |
483 | } |
484 | ||
c0b4dffb ACM |
485 | void dso__reset_find_symbol_cache(struct dso *dso) |
486 | { | |
487 | enum map_type type; | |
488 | ||
489 | for (type = MAP__FUNCTION; type <= MAP__VARIABLE; ++type) { | |
490 | dso->last_find_result[type].addr = 0; | |
491 | dso->last_find_result[type].symbol = NULL; | |
492 | } | |
493 | } | |
494 | ||
ae93a6c7 CP |
495 | void dso__insert_symbol(struct dso *dso, enum map_type type, struct symbol *sym) |
496 | { | |
608c34de | 497 | __symbols__insert(&dso->symbols[type], sym, dso->kernel); |
ae93a6c7 CP |
498 | |
499 | /* update the symbol cache if necessary */ | |
500 | if (dso->last_find_result[type].addr >= sym->start && | |
501 | (dso->last_find_result[type].addr < sym->end || | |
502 | sym->start == sym->end)) { | |
503 | dso->last_find_result[type].symbol = sym; | |
504 | } | |
505 | } | |
506 | ||
aeafcbaf | 507 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 508 | enum map_type type, u64 addr) |
fcf1203a | 509 | { |
b843f62a | 510 | if (dso->last_find_result[type].addr != addr || dso->last_find_result[type].symbol == NULL) { |
b685ac22 ACM |
511 | dso->last_find_result[type].addr = addr; |
512 | dso->last_find_result[type].symbol = symbols__find(&dso->symbols[type], addr); | |
513 | } | |
514 | ||
515 | return dso->last_find_result[type].symbol; | |
fcf1203a ACM |
516 | } |
517 | ||
5cf88a63 | 518 | static struct symbol *__dso__first_symbol(struct dso *dso, enum map_type type) |
8e0cf965 AH |
519 | { |
520 | return symbols__first(&dso->symbols[type]); | |
9c00a81b AH |
521 | } |
522 | ||
5cf88a63 ACM |
523 | struct symbol *dso__first_symbol(struct dso *dso) |
524 | { | |
525 | return __dso__first_symbol(dso, MAP__FUNCTION); | |
526 | } | |
527 | ||
528 | static struct symbol *__dso__last_symbol(struct dso *dso, enum map_type type) | |
cd67f99f AH |
529 | { |
530 | return symbols__last(&dso->symbols[type]); | |
531 | } | |
532 | ||
5cf88a63 ACM |
533 | struct symbol *dso__last_symbol(struct dso *dso) |
534 | { | |
535 | return __dso__last_symbol(dso, MAP__FUNCTION); | |
536 | } | |
537 | ||
9c00a81b AH |
538 | struct symbol *dso__next_symbol(struct symbol *sym) |
539 | { | |
540 | return symbols__next(sym); | |
8e0cf965 AH |
541 | } |
542 | ||
18bd7264 ACM |
543 | struct symbol *symbol__next_by_name(struct symbol *sym) |
544 | { | |
545 | struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym); | |
546 | struct rb_node *n = rb_next(&s->rb_node); | |
547 | ||
548 | return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL; | |
549 | } | |
550 | ||
551 | /* | |
552 | * Teturns first symbol that matched with @name. | |
553 | */ | |
aeafcbaf | 554 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
555 | const char *name) |
556 | { | |
d8040645 PC |
557 | struct symbol *s = symbols__find_by_name(&dso->symbol_names[type], name, |
558 | SYMBOL_TAG_INCLUDE__NONE); | |
559 | if (!s) | |
560 | s = symbols__find_by_name(&dso->symbol_names[type], name, | |
561 | SYMBOL_TAG_INCLUDE__DEFAULT_ONLY); | |
562 | return s; | |
79406cd7 ACM |
563 | } |
564 | ||
aeafcbaf | 565 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 566 | { |
aeafcbaf ACM |
567 | dso__set_sorted_by_name(dso, type); |
568 | return symbols__sort_by_name(&dso->symbol_names[type], | |
569 | &dso->symbols[type]); | |
79406cd7 ACM |
570 | } |
571 | ||
316d70d6 AH |
572 | int modules__parse(const char *filename, void *arg, |
573 | int (*process_module)(void *arg, const char *name, | |
9ad4652b | 574 | u64 start, u64 size)) |
316d70d6 AH |
575 | { |
576 | char *line = NULL; | |
577 | size_t n; | |
578 | FILE *file; | |
579 | int err = 0; | |
580 | ||
581 | file = fopen(filename, "r"); | |
582 | if (file == NULL) | |
583 | return -1; | |
584 | ||
585 | while (1) { | |
586 | char name[PATH_MAX]; | |
9ad4652b TR |
587 | u64 start, size; |
588 | char *sep, *endptr; | |
316d70d6 AH |
589 | ssize_t line_len; |
590 | ||
591 | line_len = getline(&line, &n, file); | |
592 | if (line_len < 0) { | |
593 | if (feof(file)) | |
594 | break; | |
595 | err = -1; | |
596 | goto out; | |
597 | } | |
598 | ||
599 | if (!line) { | |
600 | err = -1; | |
601 | goto out; | |
602 | } | |
603 | ||
604 | line[--line_len] = '\0'; /* \n */ | |
605 | ||
606 | sep = strrchr(line, 'x'); | |
607 | if (sep == NULL) | |
608 | continue; | |
609 | ||
610 | hex2u64(sep + 1, &start); | |
611 | ||
612 | sep = strchr(line, ' '); | |
613 | if (sep == NULL) | |
614 | continue; | |
615 | ||
616 | *sep = '\0'; | |
617 | ||
618 | scnprintf(name, sizeof(name), "[%s]", line); | |
619 | ||
9ad4652b TR |
620 | size = strtoul(sep + 1, &endptr, 0); |
621 | if (*endptr != ' ' && *endptr != '\t') | |
622 | continue; | |
623 | ||
624 | err = process_module(arg, name, start, size); | |
316d70d6 AH |
625 | if (err) |
626 | break; | |
627 | } | |
628 | out: | |
629 | free(line); | |
630 | fclose(file); | |
631 | return err; | |
632 | } | |
633 | ||
682b335a ACM |
634 | struct process_kallsyms_args { |
635 | struct map *map; | |
636 | struct dso *dso; | |
637 | }; | |
638 | ||
e7110b9f ACM |
639 | /* |
640 | * These are symbols in the kernel image, so make sure that | |
641 | * sym is from a kernel DSO. | |
642 | */ | |
608c34de | 643 | static bool symbol__is_idle(const char *name) |
82d1deb0 DA |
644 | { |
645 | const char * const idle_symbols[] = { | |
646 | "cpu_idle", | |
e0336ed6 | 647 | "cpu_startup_entry", |
82d1deb0 DA |
648 | "intel_idle", |
649 | "default_idle", | |
650 | "native_safe_halt", | |
651 | "enter_idle", | |
652 | "exit_idle", | |
653 | "mwait_idle", | |
654 | "mwait_idle_with_hints", | |
655 | "poll_idle", | |
656 | "ppc64_runlatch_off", | |
657 | "pseries_dedicated_idle_sleep", | |
658 | NULL | |
659 | }; | |
82d1deb0 DA |
660 | int i; |
661 | ||
82d1deb0 | 662 | for (i = 0; idle_symbols[i]; i++) { |
608c34de | 663 | if (!strcmp(idle_symbols[i], name)) |
82d1deb0 DA |
664 | return true; |
665 | } | |
666 | ||
667 | return false; | |
668 | } | |
669 | ||
682b335a | 670 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 671 | char type, u64 start) |
682b335a ACM |
672 | { |
673 | struct symbol *sym; | |
674 | struct process_kallsyms_args *a = arg; | |
675 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
676 | ||
677 | if (!symbol_type__is_a(type, a->map->type)) | |
678 | return 0; | |
679 | ||
82151520 CS |
680 | /* |
681 | * module symbols are not sorted so we add all | |
682 | * symbols, setting length to 0, and rely on | |
683 | * symbols__fixup_end() to fix it up. | |
684 | */ | |
8e947f1e | 685 | sym = symbol__new(start, 0, kallsyms2elf_binding(type), name); |
682b335a ACM |
686 | if (sym == NULL) |
687 | return -ENOMEM; | |
688 | /* | |
689 | * We will pass the symbols to the filter later, in | |
690 | * map__split_kallsyms, when we have split the maps per module | |
691 | */ | |
608c34de | 692 | __symbols__insert(root, sym, !strchr(name, '[')); |
a1645ce1 | 693 | |
682b335a ACM |
694 | return 0; |
695 | } | |
696 | ||
697 | /* | |
698 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
699 | * so that we can in the next step set the symbol ->end address and then | |
700 | * call kernel_maps__split_kallsyms. | |
701 | */ | |
aeafcbaf | 702 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 703 | struct map *map) |
682b335a | 704 | { |
aeafcbaf | 705 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 706 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
707 | } |
708 | ||
be39db9f | 709 | static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map) |
8e0cf965 | 710 | { |
ba92732e | 711 | struct map_groups *kmaps = map__kmaps(map); |
8e0cf965 AH |
712 | struct map *curr_map; |
713 | struct symbol *pos; | |
866548dd AH |
714 | int count = 0; |
715 | struct rb_root old_root = dso->symbols[map->type]; | |
8e0cf965 AH |
716 | struct rb_root *root = &dso->symbols[map->type]; |
717 | struct rb_node *next = rb_first(root); | |
718 | ||
ba92732e WN |
719 | if (!kmaps) |
720 | return -1; | |
721 | ||
866548dd AH |
722 | *root = RB_ROOT; |
723 | ||
8e0cf965 AH |
724 | while (next) { |
725 | char *module; | |
726 | ||
727 | pos = rb_entry(next, struct symbol, rb_node); | |
728 | next = rb_next(&pos->rb_node); | |
729 | ||
866548dd AH |
730 | rb_erase_init(&pos->rb_node, &old_root); |
731 | ||
8e0cf965 AH |
732 | module = strchr(pos->name, '\t'); |
733 | if (module) | |
734 | *module = '\0'; | |
735 | ||
abe5449d | 736 | curr_map = __map_groups__find(kmaps, map->type, pos->start); |
8e0cf965 | 737 | |
be39db9f | 738 | if (!curr_map) { |
8e0cf965 | 739 | symbol__delete(pos); |
866548dd | 740 | continue; |
8e0cf965 | 741 | } |
866548dd AH |
742 | |
743 | pos->start -= curr_map->start - curr_map->pgoff; | |
744 | if (pos->end) | |
745 | pos->end -= curr_map->start - curr_map->pgoff; | |
746 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
747 | ++count; | |
8e0cf965 AH |
748 | } |
749 | ||
750 | /* Symbols have been adjusted */ | |
751 | dso->adjust_symbols = 1; | |
752 | ||
866548dd | 753 | return count; |
8e0cf965 AH |
754 | } |
755 | ||
2e538c4a ACM |
756 | /* |
757 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
758 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
759 | * the original ELF section names vmlinux have. | |
760 | */ | |
be39db9f | 761 | static int dso__split_kallsyms(struct dso *dso, struct map *map, u64 delta) |
2e538c4a | 762 | { |
ba92732e WN |
763 | struct map_groups *kmaps = map__kmaps(map); |
764 | struct machine *machine; | |
4e06255f | 765 | struct map *curr_map = map; |
2e538c4a | 766 | struct symbol *pos; |
48000a1a | 767 | int count = 0, moved = 0; |
aeafcbaf | 768 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 769 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
770 | int kernel_range = 0; |
771 | ||
ba92732e WN |
772 | if (!kmaps) |
773 | return -1; | |
774 | ||
775 | machine = kmaps->machine; | |
776 | ||
2e538c4a ACM |
777 | while (next) { |
778 | char *module; | |
779 | ||
780 | pos = rb_entry(next, struct symbol, rb_node); | |
781 | next = rb_next(&pos->rb_node); | |
782 | ||
783 | module = strchr(pos->name, '\t'); | |
784 | if (module) { | |
75be6cf4 | 785 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
786 | goto discard_symbol; |
787 | ||
2e538c4a ACM |
788 | *module++ = '\0'; |
789 | ||
b7cece76 | 790 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 791 | if (curr_map != map && |
aeafcbaf | 792 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 793 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
794 | /* |
795 | * We assume all symbols of a module are | |
796 | * continuous in * kallsyms, so curr_map | |
797 | * points to a module and all its | |
798 | * symbols are in its kmap. Mark it as | |
799 | * loaded. | |
800 | */ | |
801 | dso__set_loaded(curr_map->dso, | |
802 | curr_map->type); | |
803 | } | |
804 | ||
83cf774b | 805 | curr_map = __map_groups__find_by_name(kmaps, map->type, module); |
4e06255f | 806 | if (curr_map == NULL) { |
2f51903b | 807 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 808 | "inconsistency while looking " |
a1645ce1 | 809 | "for \"%s\" module!\n", |
23346f21 | 810 | machine->root_dir, module); |
a1645ce1 ZY |
811 | curr_map = map; |
812 | goto discard_symbol; | |
af427bf5 | 813 | } |
b7cece76 | 814 | |
a1645ce1 | 815 | if (curr_map->dso->loaded && |
23346f21 | 816 | !machine__is_default_guest(machine)) |
b7cece76 | 817 | goto discard_symbol; |
af427bf5 | 818 | } |
2e538c4a ACM |
819 | /* |
820 | * So that we look just like we get from .ko files, | |
821 | * i.e. not prelinked, relative to map->start. | |
822 | */ | |
4e06255f ACM |
823 | pos->start = curr_map->map_ip(curr_map, pos->start); |
824 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
825 | } else if (curr_map != map) { | |
2e538c4a | 826 | char dso_name[PATH_MAX]; |
aeafcbaf | 827 | struct dso *ndso; |
2e538c4a | 828 | |
d9b62aba AH |
829 | if (delta) { |
830 | /* Kernel was relocated at boot time */ | |
831 | pos->start -= delta; | |
832 | pos->end -= delta; | |
833 | } | |
834 | ||
8a953312 ACM |
835 | if (count == 0) { |
836 | curr_map = map; | |
be39db9f | 837 | goto add_symbol; |
8a953312 ACM |
838 | } |
839 | ||
aeafcbaf | 840 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
841 | snprintf(dso_name, sizeof(dso_name), |
842 | "[guest.kernel].%d", | |
843 | kernel_range++); | |
844 | else | |
845 | snprintf(dso_name, sizeof(dso_name), | |
846 | "[kernel].%d", | |
847 | kernel_range++); | |
2e538c4a | 848 | |
aeafcbaf ACM |
849 | ndso = dso__new(dso_name); |
850 | if (ndso == NULL) | |
2e538c4a ACM |
851 | return -1; |
852 | ||
aeafcbaf | 853 | ndso->kernel = dso->kernel; |
a1645ce1 | 854 | |
aeafcbaf | 855 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 856 | if (curr_map == NULL) { |
d3a7c489 | 857 | dso__put(ndso); |
2e538c4a ACM |
858 | return -1; |
859 | } | |
a2928c42 | 860 | |
4e06255f | 861 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 862 | map_groups__insert(kmaps, curr_map); |
2e538c4a | 863 | ++kernel_range; |
d9b62aba AH |
864 | } else if (delta) { |
865 | /* Kernel was relocated at boot time */ | |
866 | pos->start -= delta; | |
867 | pos->end -= delta; | |
2e538c4a | 868 | } |
be39db9f ACM |
869 | add_symbol: |
870 | if (curr_map != map) { | |
871 | rb_erase(&pos->rb_node, root); | |
872 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
873 | ++moved; | |
874 | } else | |
875 | ++count; | |
876 | ||
877 | continue; | |
878 | discard_symbol: | |
879 | rb_erase(&pos->rb_node, root); | |
880 | symbol__delete(pos); | |
a2928c42 ACM |
881 | } |
882 | ||
a1645ce1 | 883 | if (curr_map != map && |
aeafcbaf | 884 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 885 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
886 | dso__set_loaded(curr_map->dso, curr_map->type); |
887 | } | |
888 | ||
8a953312 | 889 | return count + moved; |
2e538c4a | 890 | } |
a2928c42 | 891 | |
3f067dca ACM |
892 | bool symbol__restricted_filename(const char *filename, |
893 | const char *restricted_filename) | |
ec80fde7 ACM |
894 | { |
895 | bool restricted = false; | |
896 | ||
897 | if (symbol_conf.kptr_restrict) { | |
898 | char *r = realpath(filename, NULL); | |
899 | ||
900 | if (r != NULL) { | |
901 | restricted = strcmp(r, restricted_filename) == 0; | |
902 | free(r); | |
903 | return restricted; | |
904 | } | |
905 | } | |
906 | ||
907 | return restricted; | |
908 | } | |
909 | ||
52afdaf9 AH |
910 | struct module_info { |
911 | struct rb_node rb_node; | |
912 | char *name; | |
913 | u64 start; | |
8e0cf965 AH |
914 | }; |
915 | ||
52afdaf9 | 916 | static void add_module(struct module_info *mi, struct rb_root *modules) |
8e0cf965 | 917 | { |
52afdaf9 AH |
918 | struct rb_node **p = &modules->rb_node; |
919 | struct rb_node *parent = NULL; | |
920 | struct module_info *m; | |
8e0cf965 | 921 | |
52afdaf9 AH |
922 | while (*p != NULL) { |
923 | parent = *p; | |
924 | m = rb_entry(parent, struct module_info, rb_node); | |
925 | if (strcmp(mi->name, m->name) < 0) | |
926 | p = &(*p)->rb_left; | |
927 | else | |
928 | p = &(*p)->rb_right; | |
929 | } | |
930 | rb_link_node(&mi->rb_node, parent, p); | |
931 | rb_insert_color(&mi->rb_node, modules); | |
932 | } | |
933 | ||
934 | static void delete_modules(struct rb_root *modules) | |
935 | { | |
936 | struct module_info *mi; | |
937 | struct rb_node *next = rb_first(modules); | |
938 | ||
939 | while (next) { | |
940 | mi = rb_entry(next, struct module_info, rb_node); | |
941 | next = rb_next(&mi->rb_node); | |
942 | rb_erase(&mi->rb_node, modules); | |
74cf249d | 943 | zfree(&mi->name); |
52afdaf9 AH |
944 | free(mi); |
945 | } | |
946 | } | |
947 | ||
948 | static struct module_info *find_module(const char *name, | |
949 | struct rb_root *modules) | |
950 | { | |
951 | struct rb_node *n = modules->rb_node; | |
952 | ||
953 | while (n) { | |
954 | struct module_info *m; | |
955 | int cmp; | |
956 | ||
957 | m = rb_entry(n, struct module_info, rb_node); | |
958 | cmp = strcmp(name, m->name); | |
959 | if (cmp < 0) | |
960 | n = n->rb_left; | |
961 | else if (cmp > 0) | |
962 | n = n->rb_right; | |
963 | else | |
964 | return m; | |
965 | } | |
966 | ||
967 | return NULL; | |
968 | } | |
969 | ||
9ad4652b TR |
970 | static int __read_proc_modules(void *arg, const char *name, u64 start, |
971 | u64 size __maybe_unused) | |
52afdaf9 AH |
972 | { |
973 | struct rb_root *modules = arg; | |
974 | struct module_info *mi; | |
975 | ||
976 | mi = zalloc(sizeof(struct module_info)); | |
977 | if (!mi) | |
8e0cf965 AH |
978 | return -ENOMEM; |
979 | ||
52afdaf9 AH |
980 | mi->name = strdup(name); |
981 | mi->start = start; | |
8e0cf965 | 982 | |
52afdaf9 AH |
983 | if (!mi->name) { |
984 | free(mi); | |
985 | return -ENOMEM; | |
986 | } | |
987 | ||
988 | add_module(mi, modules); | |
989 | ||
990 | return 0; | |
991 | } | |
992 | ||
993 | static int read_proc_modules(const char *filename, struct rb_root *modules) | |
994 | { | |
995 | if (symbol__restricted_filename(filename, "/proc/modules")) | |
996 | return -1; | |
997 | ||
998 | if (modules__parse(filename, modules, __read_proc_modules)) { | |
999 | delete_modules(modules); | |
1000 | return -1; | |
1001 | } | |
8e0cf965 AH |
1002 | |
1003 | return 0; | |
1004 | } | |
1005 | ||
fc1b691d AH |
1006 | int compare_proc_modules(const char *from, const char *to) |
1007 | { | |
1008 | struct rb_root from_modules = RB_ROOT; | |
1009 | struct rb_root to_modules = RB_ROOT; | |
1010 | struct rb_node *from_node, *to_node; | |
1011 | struct module_info *from_m, *to_m; | |
1012 | int ret = -1; | |
1013 | ||
1014 | if (read_proc_modules(from, &from_modules)) | |
1015 | return -1; | |
1016 | ||
1017 | if (read_proc_modules(to, &to_modules)) | |
1018 | goto out_delete_from; | |
1019 | ||
1020 | from_node = rb_first(&from_modules); | |
1021 | to_node = rb_first(&to_modules); | |
1022 | while (from_node) { | |
1023 | if (!to_node) | |
1024 | break; | |
1025 | ||
1026 | from_m = rb_entry(from_node, struct module_info, rb_node); | |
1027 | to_m = rb_entry(to_node, struct module_info, rb_node); | |
1028 | ||
1029 | if (from_m->start != to_m->start || | |
1030 | strcmp(from_m->name, to_m->name)) | |
1031 | break; | |
1032 | ||
1033 | from_node = rb_next(from_node); | |
1034 | to_node = rb_next(to_node); | |
1035 | } | |
1036 | ||
1037 | if (!from_node && !to_node) | |
1038 | ret = 0; | |
1039 | ||
1040 | delete_modules(&to_modules); | |
1041 | out_delete_from: | |
1042 | delete_modules(&from_modules); | |
1043 | ||
1044 | return ret; | |
1045 | } | |
1046 | ||
dce0478b ACM |
1047 | static struct map *__map_groups__first(struct map_groups *mg, enum map_type type) |
1048 | { | |
1049 | return maps__first(&mg->maps[type]); | |
1050 | } | |
1051 | ||
1052 | struct map *map_groups__first(struct map_groups *mg) | |
1053 | { | |
1054 | return __map_groups__first(mg, MAP__FUNCTION); | |
1055 | } | |
1056 | ||
52afdaf9 AH |
1057 | static int do_validate_kcore_modules(const char *filename, struct map *map, |
1058 | struct map_groups *kmaps) | |
1059 | { | |
1060 | struct rb_root modules = RB_ROOT; | |
1061 | struct map *old_map; | |
1062 | int err; | |
1063 | ||
1064 | err = read_proc_modules(filename, &modules); | |
1065 | if (err) | |
1066 | return err; | |
1067 | ||
dce0478b | 1068 | old_map = __map_groups__first(kmaps, map->type); |
52afdaf9 AH |
1069 | while (old_map) { |
1070 | struct map *next = map_groups__next(old_map); | |
1071 | struct module_info *mi; | |
1072 | ||
1073 | if (old_map == map || old_map->start == map->start) { | |
1074 | /* The kernel map */ | |
1075 | old_map = next; | |
1076 | continue; | |
1077 | } | |
1078 | ||
1079 | /* Module must be in memory at the same address */ | |
1080 | mi = find_module(old_map->dso->short_name, &modules); | |
1081 | if (!mi || mi->start != old_map->start) { | |
1082 | err = -EINVAL; | |
1083 | goto out; | |
1084 | } | |
1085 | ||
1086 | old_map = next; | |
1087 | } | |
1088 | out: | |
1089 | delete_modules(&modules); | |
1090 | return err; | |
1091 | } | |
1092 | ||
8e0cf965 | 1093 | /* |
52afdaf9 | 1094 | * If kallsyms is referenced by name then we look for filename in the same |
8e0cf965 AH |
1095 | * directory. |
1096 | */ | |
52afdaf9 AH |
1097 | static bool filename_from_kallsyms_filename(char *filename, |
1098 | const char *base_name, | |
1099 | const char *kallsyms_filename) | |
8e0cf965 AH |
1100 | { |
1101 | char *name; | |
1102 | ||
52afdaf9 AH |
1103 | strcpy(filename, kallsyms_filename); |
1104 | name = strrchr(filename, '/'); | |
8e0cf965 AH |
1105 | if (!name) |
1106 | return false; | |
1107 | ||
52afdaf9 AH |
1108 | name += 1; |
1109 | ||
1110 | if (!strcmp(name, "kallsyms")) { | |
1111 | strcpy(name, base_name); | |
8e0cf965 AH |
1112 | return true; |
1113 | } | |
1114 | ||
1115 | return false; | |
1116 | } | |
1117 | ||
52afdaf9 AH |
1118 | static int validate_kcore_modules(const char *kallsyms_filename, |
1119 | struct map *map) | |
1120 | { | |
ba92732e | 1121 | struct map_groups *kmaps = map__kmaps(map); |
52afdaf9 AH |
1122 | char modules_filename[PATH_MAX]; |
1123 | ||
ba92732e WN |
1124 | if (!kmaps) |
1125 | return -EINVAL; | |
1126 | ||
52afdaf9 AH |
1127 | if (!filename_from_kallsyms_filename(modules_filename, "modules", |
1128 | kallsyms_filename)) | |
1129 | return -EINVAL; | |
1130 | ||
1131 | if (do_validate_kcore_modules(modules_filename, map, kmaps)) | |
1132 | return -EINVAL; | |
1133 | ||
1134 | return 0; | |
1135 | } | |
1136 | ||
a00d28cb AH |
1137 | static int validate_kcore_addresses(const char *kallsyms_filename, |
1138 | struct map *map) | |
1139 | { | |
1140 | struct kmap *kmap = map__kmap(map); | |
1141 | ||
ba92732e WN |
1142 | if (!kmap) |
1143 | return -EINVAL; | |
1144 | ||
a00d28cb AH |
1145 | if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) { |
1146 | u64 start; | |
1147 | ||
b843f62a ACM |
1148 | if (kallsyms__get_function_start(kallsyms_filename, |
1149 | kmap->ref_reloc_sym->name, &start)) | |
1150 | return -ENOENT; | |
a00d28cb AH |
1151 | if (start != kmap->ref_reloc_sym->addr) |
1152 | return -EINVAL; | |
1153 | } | |
1154 | ||
1155 | return validate_kcore_modules(kallsyms_filename, map); | |
1156 | } | |
1157 | ||
52afdaf9 AH |
1158 | struct kcore_mapfn_data { |
1159 | struct dso *dso; | |
1160 | enum map_type type; | |
1161 | struct list_head maps; | |
1162 | }; | |
1163 | ||
1164 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
1165 | { | |
1166 | struct kcore_mapfn_data *md = data; | |
1167 | struct map *map; | |
1168 | ||
1169 | map = map__new2(start, md->dso, md->type); | |
1170 | if (map == NULL) | |
1171 | return -ENOMEM; | |
1172 | ||
1173 | map->end = map->start + len; | |
1174 | map->pgoff = pgoff; | |
1175 | ||
1176 | list_add(&map->node, &md->maps); | |
1177 | ||
1178 | return 0; | |
1179 | } | |
1180 | ||
8e0cf965 AH |
1181 | static int dso__load_kcore(struct dso *dso, struct map *map, |
1182 | const char *kallsyms_filename) | |
1183 | { | |
ba92732e | 1184 | struct map_groups *kmaps = map__kmaps(map); |
8e0cf965 AH |
1185 | struct kcore_mapfn_data md; |
1186 | struct map *old_map, *new_map, *replacement_map = NULL; | |
1187 | bool is_64_bit; | |
1188 | int err, fd; | |
1189 | char kcore_filename[PATH_MAX]; | |
1190 | struct symbol *sym; | |
1191 | ||
ba92732e WN |
1192 | if (!kmaps) |
1193 | return -EINVAL; | |
1194 | ||
8e0cf965 | 1195 | /* This function requires that the map is the kernel map */ |
efdd5c6b | 1196 | if (!__map__is_kernel(map)) |
8e0cf965 AH |
1197 | return -EINVAL; |
1198 | ||
52afdaf9 AH |
1199 | if (!filename_from_kallsyms_filename(kcore_filename, "kcore", |
1200 | kallsyms_filename)) | |
1201 | return -EINVAL; | |
1202 | ||
a00d28cb AH |
1203 | /* Modules and kernel must be present at their original addresses */ |
1204 | if (validate_kcore_addresses(kallsyms_filename, map)) | |
8e0cf965 AH |
1205 | return -EINVAL; |
1206 | ||
1207 | md.dso = dso; | |
1208 | md.type = map->type; | |
1209 | INIT_LIST_HEAD(&md.maps); | |
1210 | ||
1211 | fd = open(kcore_filename, O_RDONLY); | |
36c8bb56 | 1212 | if (fd < 0) { |
133de940 AH |
1213 | pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n", |
1214 | kcore_filename); | |
8e0cf965 | 1215 | return -EINVAL; |
36c8bb56 | 1216 | } |
8e0cf965 AH |
1217 | |
1218 | /* Read new maps into temporary lists */ | |
1219 | err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md, | |
1220 | &is_64_bit); | |
1221 | if (err) | |
1222 | goto out_err; | |
c6d8f2a4 | 1223 | dso->is_64_bit = is_64_bit; |
8e0cf965 AH |
1224 | |
1225 | if (list_empty(&md.maps)) { | |
1226 | err = -EINVAL; | |
1227 | goto out_err; | |
1228 | } | |
1229 | ||
1230 | /* Remove old maps */ | |
dce0478b | 1231 | old_map = __map_groups__first(kmaps, map->type); |
8e0cf965 AH |
1232 | while (old_map) { |
1233 | struct map *next = map_groups__next(old_map); | |
1234 | ||
1235 | if (old_map != map) | |
1236 | map_groups__remove(kmaps, old_map); | |
1237 | old_map = next; | |
1238 | } | |
1239 | ||
1240 | /* Find the kernel map using the first symbol */ | |
5cf88a63 | 1241 | sym = __dso__first_symbol(dso, map->type); |
8e0cf965 AH |
1242 | list_for_each_entry(new_map, &md.maps, node) { |
1243 | if (sym && sym->start >= new_map->start && | |
1244 | sym->start < new_map->end) { | |
1245 | replacement_map = new_map; | |
1246 | break; | |
1247 | } | |
1248 | } | |
1249 | ||
1250 | if (!replacement_map) | |
1251 | replacement_map = list_entry(md.maps.next, struct map, node); | |
1252 | ||
1253 | /* Add new maps */ | |
1254 | while (!list_empty(&md.maps)) { | |
1255 | new_map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1256 | list_del_init(&new_map->node); |
8e0cf965 AH |
1257 | if (new_map == replacement_map) { |
1258 | map->start = new_map->start; | |
1259 | map->end = new_map->end; | |
1260 | map->pgoff = new_map->pgoff; | |
1261 | map->map_ip = new_map->map_ip; | |
1262 | map->unmap_ip = new_map->unmap_ip; | |
8e0cf965 | 1263 | /* Ensure maps are correctly ordered */ |
84c2cafa | 1264 | map__get(map); |
8e0cf965 AH |
1265 | map_groups__remove(kmaps, map); |
1266 | map_groups__insert(kmaps, map); | |
84c2cafa | 1267 | map__put(map); |
8e0cf965 AH |
1268 | } else { |
1269 | map_groups__insert(kmaps, new_map); | |
1270 | } | |
84c2cafa ACM |
1271 | |
1272 | map__put(new_map); | |
8e0cf965 AH |
1273 | } |
1274 | ||
1275 | /* | |
1276 | * Set the data type and long name so that kcore can be read via | |
1277 | * dso__data_read_addr(). | |
1278 | */ | |
1279 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
5f70619d | 1280 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE; |
8e0cf965 | 1281 | else |
5f70619d | 1282 | dso->binary_type = DSO_BINARY_TYPE__KCORE; |
7e155d4d | 1283 | dso__set_long_name(dso, strdup(kcore_filename), true); |
8e0cf965 AH |
1284 | |
1285 | close(fd); | |
1286 | ||
1287 | if (map->type == MAP__FUNCTION) | |
1288 | pr_debug("Using %s for kernel object code\n", kcore_filename); | |
1289 | else | |
1290 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
1291 | ||
1292 | return 0; | |
1293 | ||
1294 | out_err: | |
1295 | while (!list_empty(&md.maps)) { | |
1296 | map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1297 | list_del_init(&map->node); |
84c2cafa | 1298 | map__put(map); |
8e0cf965 AH |
1299 | } |
1300 | close(fd); | |
1301 | return -EINVAL; | |
1302 | } | |
1303 | ||
d9b62aba AH |
1304 | /* |
1305 | * If the kernel is relocated at boot time, kallsyms won't match. Compute the | |
1306 | * delta based on the relocation reference symbol. | |
1307 | */ | |
1308 | static int kallsyms__delta(struct map *map, const char *filename, u64 *delta) | |
1309 | { | |
1310 | struct kmap *kmap = map__kmap(map); | |
1311 | u64 addr; | |
1312 | ||
ba92732e WN |
1313 | if (!kmap) |
1314 | return -1; | |
1315 | ||
d9b62aba AH |
1316 | if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name) |
1317 | return 0; | |
1318 | ||
b843f62a | 1319 | if (kallsyms__get_function_start(filename, kmap->ref_reloc_sym->name, &addr)) |
d9b62aba AH |
1320 | return -1; |
1321 | ||
1322 | *delta = addr - kmap->ref_reloc_sym->addr; | |
1323 | return 0; | |
1324 | } | |
1325 | ||
e02092b9 | 1326 | int __dso__load_kallsyms(struct dso *dso, const char *filename, |
be39db9f | 1327 | struct map *map, bool no_kcore) |
2e538c4a | 1328 | { |
d9b62aba AH |
1329 | u64 delta = 0; |
1330 | ||
ec80fde7 ACM |
1331 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1332 | return -1; | |
1333 | ||
aeafcbaf | 1334 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
1335 | return -1; |
1336 | ||
d9b62aba AH |
1337 | if (kallsyms__delta(map, filename, &delta)) |
1338 | return -1; | |
1339 | ||
3f5a4272 | 1340 | symbols__fixup_end(&dso->symbols[map->type]); |
432746f8 | 1341 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 | 1342 | |
aeafcbaf | 1343 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 1344 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 1345 | else |
44f24cb3 | 1346 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 1347 | |
e02092b9 | 1348 | if (!no_kcore && !dso__load_kcore(dso, map, filename)) |
be39db9f | 1349 | return dso__split_kallsyms_for_kcore(dso, map); |
8e0cf965 | 1350 | else |
be39db9f | 1351 | return dso__split_kallsyms(dso, map, delta); |
af427bf5 ACM |
1352 | } |
1353 | ||
e02092b9 | 1354 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
be39db9f | 1355 | struct map *map) |
e02092b9 | 1356 | { |
be39db9f | 1357 | return __dso__load_kallsyms(dso, filename, map, false); |
e02092b9 ACM |
1358 | } |
1359 | ||
bf2e710b KJ |
1360 | static int dso__load_perf_map(const char *map_path, struct dso *dso, |
1361 | struct map *map) | |
80d496be PE |
1362 | { |
1363 | char *line = NULL; | |
1364 | size_t n; | |
1365 | FILE *file; | |
1366 | int nr_syms = 0; | |
1367 | ||
bf2e710b | 1368 | file = fopen(map_path, "r"); |
80d496be PE |
1369 | if (file == NULL) |
1370 | goto out_failure; | |
1371 | ||
1372 | while (!feof(file)) { | |
9cffa8d5 | 1373 | u64 start, size; |
80d496be PE |
1374 | struct symbol *sym; |
1375 | int line_len, len; | |
1376 | ||
1377 | line_len = getline(&line, &n, file); | |
1378 | if (line_len < 0) | |
1379 | break; | |
1380 | ||
1381 | if (!line) | |
1382 | goto out_failure; | |
1383 | ||
1384 | line[--line_len] = '\0'; /* \n */ | |
1385 | ||
1386 | len = hex2u64(line, &start); | |
1387 | ||
1388 | len++; | |
1389 | if (len + 2 >= line_len) | |
1390 | continue; | |
1391 | ||
1392 | len += hex2u64(line + len, &size); | |
1393 | ||
1394 | len++; | |
1395 | if (len + 2 >= line_len) | |
1396 | continue; | |
1397 | ||
c408fedf | 1398 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
1399 | |
1400 | if (sym == NULL) | |
1401 | goto out_delete_line; | |
1402 | ||
be39db9f ACM |
1403 | symbols__insert(&dso->symbols[map->type], sym); |
1404 | nr_syms++; | |
80d496be PE |
1405 | } |
1406 | ||
1407 | free(line); | |
1408 | fclose(file); | |
1409 | ||
1410 | return nr_syms; | |
1411 | ||
1412 | out_delete_line: | |
1413 | free(line); | |
1414 | out_failure: | |
1415 | return -1; | |
1416 | } | |
1417 | ||
1029f9fe NK |
1418 | static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod, |
1419 | enum dso_binary_type type) | |
1420 | { | |
1421 | switch (type) { | |
1422 | case DSO_BINARY_TYPE__JAVA_JIT: | |
1423 | case DSO_BINARY_TYPE__DEBUGLINK: | |
1424 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
1425 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
1426 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
1427 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: | |
1428 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: | |
1429 | return !kmod && dso->kernel == DSO_TYPE_USER; | |
1430 | ||
1431 | case DSO_BINARY_TYPE__KALLSYMS: | |
1432 | case DSO_BINARY_TYPE__VMLINUX: | |
1433 | case DSO_BINARY_TYPE__KCORE: | |
1434 | return dso->kernel == DSO_TYPE_KERNEL; | |
1435 | ||
1436 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
1437 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
1438 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
1439 | return dso->kernel == DSO_TYPE_GUEST_KERNEL; | |
1440 | ||
1441 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 1442 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
1029f9fe | 1443 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: |
c00c48fc | 1444 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
1029f9fe NK |
1445 | /* |
1446 | * kernel modules know their symtab type - it's set when | |
9f2de315 | 1447 | * creating a module dso in machine__findnew_module_map(). |
1029f9fe NK |
1448 | */ |
1449 | return kmod && dso->symtab_type == type; | |
1450 | ||
1451 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
d2396999 | 1452 | case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO: |
1029f9fe NK |
1453 | return true; |
1454 | ||
1455 | case DSO_BINARY_TYPE__NOT_FOUND: | |
1456 | default: | |
1457 | return false; | |
1458 | } | |
1459 | } | |
1460 | ||
bf2e710b KJ |
1461 | /* Checks for the existence of the perf-<pid>.map file in two different |
1462 | * locations. First, if the process is a separate mount namespace, check in | |
1463 | * that namespace using the pid of the innermost pid namespace. If's not in a | |
1464 | * namespace, or the file can't be found there, try in the mount namespace of | |
1465 | * the tracing process using our view of its pid. | |
1466 | */ | |
1467 | static int dso__find_perf_map(char *filebuf, size_t bufsz, | |
1468 | struct nsinfo **nsip) | |
1469 | { | |
1470 | struct nscookie nsc; | |
1471 | struct nsinfo *nsi; | |
1472 | struct nsinfo *nnsi; | |
1473 | int rc = -1; | |
1474 | ||
1475 | nsi = *nsip; | |
1476 | ||
1477 | if (nsi->need_setns) { | |
1478 | snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nsi->nstgid); | |
1479 | nsinfo__mountns_enter(nsi, &nsc); | |
1480 | rc = access(filebuf, R_OK); | |
1481 | nsinfo__mountns_exit(&nsc); | |
1482 | if (rc == 0) | |
1483 | return rc; | |
1484 | } | |
1485 | ||
1486 | nnsi = nsinfo__copy(nsi); | |
1487 | if (nnsi) { | |
1488 | nsinfo__put(nsi); | |
1489 | ||
1490 | nnsi->need_setns = false; | |
1491 | snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nnsi->tgid); | |
1492 | *nsip = nnsi; | |
1493 | rc = 0; | |
1494 | } | |
1495 | ||
1496 | return rc; | |
1497 | } | |
1498 | ||
be39db9f | 1499 | int dso__load(struct dso *dso, struct map *map) |
a2928c42 | 1500 | { |
c338aee8 | 1501 | char *name; |
a2928c42 | 1502 | int ret = -1; |
44f24cb3 | 1503 | u_int i; |
23346f21 | 1504 | struct machine *machine; |
44f24cb3 | 1505 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1506 | int ss_pos = 0; |
1507 | struct symsrc ss_[2]; | |
1508 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
1029f9fe | 1509 | bool kmod; |
bf2e710b | 1510 | bool perfmap; |
5baecbcd | 1511 | unsigned char build_id[BUILD_ID_SIZE]; |
843ff37b | 1512 | struct nscookie nsc; |
bf2e710b KJ |
1513 | char newmapname[PATH_MAX]; |
1514 | const char *map_path = dso->long_name; | |
1515 | ||
1516 | perfmap = strncmp(dso->name, "/tmp/perf-", 10) == 0; | |
1517 | if (perfmap) { | |
1518 | if (dso->nsinfo && (dso__find_perf_map(newmapname, | |
1519 | sizeof(newmapname), &dso->nsinfo) == 0)) { | |
1520 | map_path = newmapname; | |
1521 | } | |
1522 | } | |
a2928c42 | 1523 | |
843ff37b | 1524 | nsinfo__mountns_enter(dso->nsinfo, &nsc); |
4a936edc NK |
1525 | pthread_mutex_lock(&dso->lock); |
1526 | ||
1527 | /* check again under the dso->lock */ | |
1528 | if (dso__loaded(dso, map->type)) { | |
1529 | ret = 1; | |
1530 | goto out; | |
1531 | } | |
66bd8424 | 1532 | |
4a936edc NK |
1533 | if (dso->kernel) { |
1534 | if (dso->kernel == DSO_TYPE_KERNEL) | |
be39db9f | 1535 | ret = dso__load_kernel_sym(dso, map); |
4a936edc | 1536 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
be39db9f | 1537 | ret = dso__load_guest_kernel_sym(dso, map); |
4a936edc NK |
1538 | |
1539 | goto out; | |
1540 | } | |
a1645ce1 | 1541 | |
23346f21 ACM |
1542 | if (map->groups && map->groups->machine) |
1543 | machine = map->groups->machine; | |
a1645ce1 | 1544 | else |
23346f21 | 1545 | machine = NULL; |
c338aee8 | 1546 | |
aeafcbaf | 1547 | dso->adjust_symbols = 0; |
f5812a7a | 1548 | |
bf2e710b | 1549 | if (perfmap) { |
981c1252 PE |
1550 | struct stat st; |
1551 | ||
bf2e710b | 1552 | if (lstat(map_path, &st) < 0) |
4a936edc | 1553 | goto out; |
981c1252 | 1554 | |
2059fc7a | 1555 | if (!symbol_conf.force && st.st_uid && (st.st_uid != geteuid())) { |
981c1252 | 1556 | pr_warning("File %s not owned by current user or root, " |
bf2e710b | 1557 | "ignoring it (use -f to override).\n", map_path); |
4a936edc | 1558 | goto out; |
981c1252 PE |
1559 | } |
1560 | ||
bf2e710b | 1561 | ret = dso__load_perf_map(map_path, dso, map); |
44f24cb3 JO |
1562 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1563 | DSO_BINARY_TYPE__NOT_FOUND; | |
4a936edc | 1564 | goto out; |
94cb9e38 ACM |
1565 | } |
1566 | ||
44f24cb3 JO |
1567 | if (machine) |
1568 | root_dir = machine->root_dir; | |
1569 | ||
164c800e DA |
1570 | name = malloc(PATH_MAX); |
1571 | if (!name) | |
4a936edc | 1572 | goto out; |
164c800e | 1573 | |
1029f9fe | 1574 | kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || |
c00c48fc NK |
1575 | dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || |
1576 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE || | |
1577 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
1029f9fe | 1578 | |
5baecbcd DK |
1579 | |
1580 | /* | |
1581 | * Read the build id if possible. This is required for | |
1582 | * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work | |
1583 | */ | |
ed6c166c | 1584 | if (!dso->has_build_id && |
9b200653 VK |
1585 | is_regular_file(dso->long_name)) { |
1586 | __symbol__join_symfs(name, PATH_MAX, dso->long_name); | |
1587 | if (filename__read_build_id(name, build_id, BUILD_ID_SIZE) > 0) | |
5baecbcd | 1588 | dso__set_build_id(dso, build_id); |
9b200653 | 1589 | } |
5baecbcd | 1590 | |
1029f9fe NK |
1591 | /* |
1592 | * Iterate over candidate debug images. | |
3aafe5ae CS |
1593 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1594 | * and/or opd section) for processing. | |
6da80ce8 | 1595 | */ |
44f24cb3 | 1596 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1597 | struct symsrc *ss = &ss_[ss_pos]; |
1598 | bool next_slot = false; | |
f045b8c4 | 1599 | bool is_reg; |
d2396999 | 1600 | bool nsexit; |
c3962961 | 1601 | int sirc = -1; |
6da80ce8 | 1602 | |
005f9294 | 1603 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1604 | |
d2396999 KJ |
1605 | nsexit = (symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE || |
1606 | symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO); | |
1607 | ||
1029f9fe NK |
1608 | if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type)) |
1609 | continue; | |
1610 | ||
ee4e9625 ACM |
1611 | if (dso__read_binary_type_filename(dso, symtab_type, |
1612 | root_dir, name, PATH_MAX)) | |
44f24cb3 | 1613 | continue; |
6da80ce8 | 1614 | |
d2396999 | 1615 | if (nsexit) |
f045b8c4 KJ |
1616 | nsinfo__mountns_exit(&nsc); |
1617 | ||
1618 | is_reg = is_regular_file(name); | |
c3962961 JO |
1619 | if (is_reg) |
1620 | sirc = symsrc__init(ss, dso, name, symtab_type); | |
40356721 | 1621 | |
d2396999 | 1622 | if (nsexit) |
f045b8c4 KJ |
1623 | nsinfo__mountns_enter(dso->nsinfo, &nsc); |
1624 | ||
c3962961 | 1625 | if (!is_reg || sirc < 0) |
6da80ce8 | 1626 | continue; |
a2928c42 | 1627 | |
3aafe5ae CS |
1628 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1629 | syms_ss = ss; | |
1630 | next_slot = true; | |
0058aef6 AH |
1631 | if (!dso->symsrc_filename) |
1632 | dso->symsrc_filename = strdup(name); | |
d26cd12b CS |
1633 | } |
1634 | ||
3aafe5ae CS |
1635 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1636 | runtime_ss = ss; | |
1637 | next_slot = true; | |
a44f605b | 1638 | } |
a2928c42 | 1639 | |
3aafe5ae CS |
1640 | if (next_slot) { |
1641 | ss_pos++; | |
33ff581e | 1642 | |
3aafe5ae CS |
1643 | if (syms_ss && runtime_ss) |
1644 | break; | |
98e9f03b NK |
1645 | } else { |
1646 | symsrc__destroy(ss); | |
6da80ce8 | 1647 | } |
3aafe5ae | 1648 | |
a25e46c4 | 1649 | } |
6da80ce8 | 1650 | |
3aafe5ae CS |
1651 | if (!runtime_ss && !syms_ss) |
1652 | goto out_free; | |
1653 | ||
1654 | if (runtime_ss && !syms_ss) { | |
1655 | syms_ss = runtime_ss; | |
1656 | } | |
1657 | ||
1658 | /* We'll have to hope for the best */ | |
1659 | if (!runtime_ss && syms_ss) | |
1660 | runtime_ss = syms_ss; | |
1661 | ||
1029f9fe | 1662 | if (syms_ss) |
be39db9f | 1663 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, kmod); |
1029f9fe | 1664 | else |
3aafe5ae CS |
1665 | ret = -1; |
1666 | ||
f47b58b7 | 1667 | if (ret > 0) { |
3aafe5ae CS |
1668 | int nr_plt; |
1669 | ||
be39db9f | 1670 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map); |
3aafe5ae CS |
1671 | if (nr_plt > 0) |
1672 | ret += nr_plt; | |
60e4b10c ACM |
1673 | } |
1674 | ||
3aafe5ae CS |
1675 | for (; ss_pos > 0; ss_pos--) |
1676 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1677 | out_free: | |
a2928c42 | 1678 | free(name); |
aeafcbaf | 1679 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
4a936edc NK |
1680 | ret = 0; |
1681 | out: | |
1682 | dso__set_loaded(dso, map->type); | |
1683 | pthread_mutex_unlock(&dso->lock); | |
843ff37b | 1684 | nsinfo__mountns_exit(&nsc); |
4a936edc | 1685 | |
a2928c42 ACM |
1686 | return ret; |
1687 | } | |
1688 | ||
83cf774b | 1689 | struct map *__map_groups__find_by_name(struct map_groups *mg, enum map_type type, const char *name) |
439d473b | 1690 | { |
1eee78ae | 1691 | struct maps *maps = &mg->maps[type]; |
4bb7123d | 1692 | struct map *map; |
439d473b | 1693 | |
0a7c74ea | 1694 | down_read(&maps->lock); |
6a2ffcdd | 1695 | |
4bb7123d | 1696 | for (map = maps__first(maps); map; map = map__next(map)) { |
b7cece76 | 1697 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
6a2ffcdd | 1698 | goto out_unlock; |
439d473b ACM |
1699 | } |
1700 | ||
6a2ffcdd ACM |
1701 | map = NULL; |
1702 | ||
1703 | out_unlock: | |
0a7c74ea | 1704 | up_read(&maps->lock); |
6a2ffcdd | 1705 | return map; |
439d473b ACM |
1706 | } |
1707 | ||
aeafcbaf | 1708 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
be39db9f | 1709 | const char *vmlinux, bool vmlinux_allocated) |
a2928c42 | 1710 | { |
b68e2f91 CS |
1711 | int err = -1; |
1712 | struct symsrc ss; | |
ec5761ea | 1713 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1714 | enum dso_binary_type symtab_type; |
a2928c42 | 1715 | |
5698d2c9 NK |
1716 | if (vmlinux[0] == '/') |
1717 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1718 | else | |
972f393b | 1719 | symbol__join_symfs(symfs_vmlinux, vmlinux); |
a2928c42 | 1720 | |
21ea4539 | 1721 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1722 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1723 | else |
005f9294 | 1724 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1725 | |
005f9294 | 1726 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1727 | return -1; |
1728 | ||
be39db9f | 1729 | err = dso__load_sym(dso, map, &ss, &ss, 0); |
b68e2f91 | 1730 | symsrc__destroy(&ss); |
a2928c42 | 1731 | |
515850e4 | 1732 | if (err > 0) { |
39b12f78 | 1733 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
5f70619d | 1734 | dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
39b12f78 | 1735 | else |
5f70619d | 1736 | dso->binary_type = DSO_BINARY_TYPE__VMLINUX; |
bf4414ae | 1737 | dso__set_long_name(dso, vmlinux, vmlinux_allocated); |
515850e4 | 1738 | dso__set_loaded(dso, map->type); |
ec5761ea | 1739 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1740 | } |
3846df2e | 1741 | |
a2928c42 ACM |
1742 | return err; |
1743 | } | |
1744 | ||
be39db9f | 1745 | int dso__load_vmlinux_path(struct dso *dso, struct map *map) |
a19afe46 ACM |
1746 | { |
1747 | int i, err = 0; | |
00dc8657 | 1748 | char *filename = NULL; |
a19afe46 | 1749 | |
dc38218e ACM |
1750 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", |
1751 | vmlinux_path__nr_entries + 1); | |
1752 | ||
1753 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
be39db9f | 1754 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], false); |
dc38218e ACM |
1755 | if (err > 0) |
1756 | goto out; | |
1757 | } | |
1758 | ||
00dc8657 | 1759 | if (!symbol_conf.ignore_vmlinux_buildid) |
d2396999 | 1760 | filename = dso__build_id_filename(dso, NULL, 0, false); |
5ad90e4e | 1761 | if (filename != NULL) { |
be39db9f | 1762 | err = dso__load_vmlinux(dso, map, filename, true); |
5230fb7d | 1763 | if (err > 0) |
5ad90e4e | 1764 | goto out; |
5ad90e4e ACM |
1765 | free(filename); |
1766 | } | |
5ad90e4e | 1767 | out: |
a19afe46 ACM |
1768 | return err; |
1769 | } | |
1770 | ||
c48903b8 MH |
1771 | static bool visible_dir_filter(const char *name, struct dirent *d) |
1772 | { | |
1773 | if (d->d_type != DT_DIR) | |
1774 | return false; | |
1775 | return lsdir_no_dot_filter(name, d); | |
1776 | } | |
1777 | ||
0544d422 AH |
1778 | static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz) |
1779 | { | |
1780 | char kallsyms_filename[PATH_MAX]; | |
0544d422 | 1781 | int ret = -1; |
c48903b8 MH |
1782 | struct strlist *dirs; |
1783 | struct str_node *nd; | |
0544d422 | 1784 | |
c48903b8 MH |
1785 | dirs = lsdir(dir, visible_dir_filter); |
1786 | if (!dirs) | |
0544d422 AH |
1787 | return -1; |
1788 | ||
602a1f4d | 1789 | strlist__for_each_entry(nd, dirs) { |
0544d422 | 1790 | scnprintf(kallsyms_filename, sizeof(kallsyms_filename), |
c48903b8 | 1791 | "%s/%s/kallsyms", dir, nd->s); |
a00d28cb | 1792 | if (!validate_kcore_addresses(kallsyms_filename, map)) { |
0544d422 AH |
1793 | strlcpy(dir, kallsyms_filename, dir_sz); |
1794 | ret = 0; | |
1795 | break; | |
1796 | } | |
1797 | } | |
1798 | ||
c48903b8 | 1799 | strlist__delete(dirs); |
0544d422 AH |
1800 | |
1801 | return ret; | |
1802 | } | |
1803 | ||
11870d71 MH |
1804 | /* |
1805 | * Use open(O_RDONLY) to check readability directly instead of access(R_OK) | |
1806 | * since access(R_OK) only checks with real UID/GID but open() use effective | |
1807 | * UID/GID and actual capabilities (e.g. /proc/kcore requires CAP_SYS_RAWIO). | |
1808 | */ | |
1809 | static bool filename__readable(const char *file) | |
1810 | { | |
1811 | int fd = open(file, O_RDONLY); | |
1812 | if (fd < 0) | |
1813 | return false; | |
1814 | close(fd); | |
1815 | return true; | |
1816 | } | |
1817 | ||
0544d422 AH |
1818 | static char *dso__find_kallsyms(struct dso *dso, struct map *map) |
1819 | { | |
1820 | u8 host_build_id[BUILD_ID_SIZE]; | |
b5d8bbe8 | 1821 | char sbuild_id[SBUILD_ID_SIZE]; |
0544d422 AH |
1822 | bool is_host = false; |
1823 | char path[PATH_MAX]; | |
1824 | ||
1825 | if (!dso->has_build_id) { | |
1826 | /* | |
1827 | * Last resort, if we don't have a build-id and couldn't find | |
1828 | * any vmlinux file, try the running kernel kallsyms table. | |
1829 | */ | |
1830 | goto proc_kallsyms; | |
1831 | } | |
1832 | ||
1833 | if (sysfs__read_build_id("/sys/kernel/notes", host_build_id, | |
1834 | sizeof(host_build_id)) == 0) | |
1835 | is_host = dso__build_id_equal(dso, host_build_id); | |
1836 | ||
4e4b6c06 | 1837 | /* Try a fast path for /proc/kallsyms if possible */ |
0544d422 | 1838 | if (is_host) { |
0544d422 | 1839 | /* |
11870d71 MH |
1840 | * Do not check the build-id cache, unless we know we cannot use |
1841 | * /proc/kcore or module maps don't match to /proc/kallsyms. | |
1842 | * To check readability of /proc/kcore, do not use access(R_OK) | |
1843 | * since /proc/kcore requires CAP_SYS_RAWIO to read and access | |
1844 | * can't check it. | |
0544d422 | 1845 | */ |
11870d71 MH |
1846 | if (filename__readable("/proc/kcore") && |
1847 | !validate_kcore_addresses("/proc/kallsyms", map)) | |
1848 | goto proc_kallsyms; | |
0544d422 AH |
1849 | } |
1850 | ||
4e4b6c06 MH |
1851 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); |
1852 | ||
449867e3 | 1853 | /* Find kallsyms in build-id cache with kcore */ |
4e4b6c06 MH |
1854 | scnprintf(path, sizeof(path), "%s/%s/%s", |
1855 | buildid_dir, DSO__NAME_KCORE, sbuild_id); | |
1856 | ||
449867e3 AH |
1857 | if (!find_matching_kcore(map, path, sizeof(path))) |
1858 | return strdup(path); | |
1859 | ||
4e4b6c06 MH |
1860 | /* Use current /proc/kallsyms if possible */ |
1861 | if (is_host) { | |
1862 | proc_kallsyms: | |
1863 | return strdup("/proc/kallsyms"); | |
1864 | } | |
1865 | ||
1866 | /* Finally, find a cache of kallsyms */ | |
01412261 | 1867 | if (!build_id_cache__kallsyms_path(sbuild_id, path, sizeof(path))) { |
0544d422 AH |
1868 | pr_err("No kallsyms or vmlinux with build-id %s was found\n", |
1869 | sbuild_id); | |
1870 | return NULL; | |
1871 | } | |
1872 | ||
1873 | return strdup(path); | |
0544d422 AH |
1874 | } |
1875 | ||
be39db9f | 1876 | static int dso__load_kernel_sym(struct dso *dso, struct map *map) |
a827c875 | 1877 | { |
cc612d81 | 1878 | int err; |
9e201442 ACM |
1879 | const char *kallsyms_filename = NULL; |
1880 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1881 | /* |
b226a5a7 DA |
1882 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1883 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1884 | * |
1885 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1886 | * build-id, or if the user specifies the wrong path to the right | |
1887 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1888 | * x86_86 one, on the machine where analysis is being performed, say), | |
1889 | * or worse, /proc/kallsyms. | |
1890 | * | |
1891 | * If the specified file _has_ a build-id and there is a build-id | |
1892 | * section in the perf.data file, we will still do the expected | |
1893 | * validation in dso__load_vmlinux and will bail out if they don't | |
1894 | * match. | |
1895 | */ | |
b226a5a7 DA |
1896 | if (symbol_conf.kallsyms_name != NULL) { |
1897 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1898 | goto do_kallsyms; | |
1899 | } | |
1900 | ||
fc2be696 | 1901 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
be39db9f | 1902 | return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, false); |
dc8d6ab2 | 1903 | } |
cc612d81 | 1904 | |
fc2be696 | 1905 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
be39db9f | 1906 | err = dso__load_vmlinux_path(dso, map); |
a19afe46 | 1907 | if (err > 0) |
39b12f78 | 1908 | return err; |
cc612d81 ACM |
1909 | } |
1910 | ||
ec5761ea DA |
1911 | /* do not try local files if a symfs was given */ |
1912 | if (symbol_conf.symfs[0] != 0) | |
1913 | return -1; | |
1914 | ||
0544d422 AH |
1915 | kallsyms_allocated_filename = dso__find_kallsyms(dso, map); |
1916 | if (!kallsyms_allocated_filename) | |
1917 | return -1; | |
19fc2ded | 1918 | |
0544d422 | 1919 | kallsyms_filename = kallsyms_allocated_filename; |
439d473b | 1920 | |
cc612d81 | 1921 | do_kallsyms: |
be39db9f | 1922 | err = dso__load_kallsyms(dso, kallsyms_filename, map); |
3846df2e ACM |
1923 | if (err > 0) |
1924 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1925 | free(kallsyms_allocated_filename); |
439d473b | 1926 | |
8e0cf965 | 1927 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1928 | dso->binary_type = DSO_BINARY_TYPE__KALLSYMS; |
0a77582f | 1929 | dso__set_long_name(dso, DSO__NAME_KALLSYMS, false); |
6a4694a4 ACM |
1930 | map__fixup_start(map); |
1931 | map__fixup_end(map); | |
439d473b | 1932 | } |
94cb9e38 | 1933 | |
a827c875 ACM |
1934 | return err; |
1935 | } | |
1936 | ||
be39db9f | 1937 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map) |
a1645ce1 ZY |
1938 | { |
1939 | int err; | |
1940 | const char *kallsyms_filename = NULL; | |
23346f21 | 1941 | struct machine *machine; |
a1645ce1 ZY |
1942 | char path[PATH_MAX]; |
1943 | ||
1944 | if (!map->groups) { | |
1945 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1946 | return -1; | |
1947 | } | |
23346f21 | 1948 | machine = map->groups->machine; |
a1645ce1 | 1949 | |
23346f21 | 1950 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1951 | /* |
1952 | * if the user specified a vmlinux filename, use it and only | |
1953 | * it, reporting errors to the user if it cannot be used. | |
1954 | * Or use file guest_kallsyms inputted by user on commandline | |
1955 | */ | |
1956 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1957 | err = dso__load_vmlinux(dso, map, |
5230fb7d | 1958 | symbol_conf.default_guest_vmlinux_name, |
be39db9f | 1959 | false); |
39b12f78 | 1960 | return err; |
a1645ce1 ZY |
1961 | } |
1962 | ||
1963 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1964 | if (!kallsyms_filename) | |
1965 | return -1; | |
1966 | } else { | |
23346f21 | 1967 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1968 | kallsyms_filename = path; |
1969 | } | |
1970 | ||
be39db9f | 1971 | err = dso__load_kallsyms(dso, kallsyms_filename, map); |
8e0cf965 | 1972 | if (err > 0) |
39b12f78 | 1973 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 1974 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1975 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
8c7f1bb3 | 1976 | dso__set_long_name(dso, machine->mmap_name, false); |
a1645ce1 ZY |
1977 | map__fixup_start(map); |
1978 | map__fixup_end(map); | |
1979 | } | |
1980 | ||
1981 | return err; | |
1982 | } | |
cd84c2ac | 1983 | |
cc612d81 ACM |
1984 | static void vmlinux_path__exit(void) |
1985 | { | |
04662523 ACM |
1986 | while (--vmlinux_path__nr_entries >= 0) |
1987 | zfree(&vmlinux_path[vmlinux_path__nr_entries]); | |
c4f03547 | 1988 | vmlinux_path__nr_entries = 0; |
cc612d81 | 1989 | |
04662523 | 1990 | zfree(&vmlinux_path); |
cc612d81 ACM |
1991 | } |
1992 | ||
aac48647 ET |
1993 | static const char * const vmlinux_paths[] = { |
1994 | "vmlinux", | |
1995 | "/boot/vmlinux" | |
1996 | }; | |
1997 | ||
1998 | static const char * const vmlinux_paths_upd[] = { | |
1999 | "/boot/vmlinux-%s", | |
2000 | "/usr/lib/debug/boot/vmlinux-%s", | |
2001 | "/lib/modules/%s/build/vmlinux", | |
f55ae954 ET |
2002 | "/usr/lib/debug/lib/modules/%s/vmlinux", |
2003 | "/usr/lib/debug/boot/vmlinux-%s.debug" | |
aac48647 ET |
2004 | }; |
2005 | ||
2006 | static int vmlinux_path__add(const char *new_entry) | |
2007 | { | |
2008 | vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry); | |
2009 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2010 | return -1; | |
2011 | ++vmlinux_path__nr_entries; | |
2012 | ||
2013 | return 0; | |
2014 | } | |
2015 | ||
ce80d3be | 2016 | static int vmlinux_path__init(struct perf_env *env) |
cc612d81 ACM |
2017 | { |
2018 | struct utsname uts; | |
2019 | char bf[PATH_MAX]; | |
0a7e6d1b | 2020 | char *kernel_version; |
aac48647 | 2021 | unsigned int i; |
cc612d81 | 2022 | |
aac48647 ET |
2023 | vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) + |
2024 | ARRAY_SIZE(vmlinux_paths_upd))); | |
cc612d81 ACM |
2025 | if (vmlinux_path == NULL) |
2026 | return -1; | |
2027 | ||
aac48647 ET |
2028 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++) |
2029 | if (vmlinux_path__add(vmlinux_paths[i]) < 0) | |
2030 | goto out_fail; | |
ec5761ea | 2031 | |
0a7e6d1b | 2032 | /* only try kernel version if no symfs was given */ |
ec5761ea DA |
2033 | if (symbol_conf.symfs[0] != 0) |
2034 | return 0; | |
2035 | ||
0a7e6d1b NK |
2036 | if (env) { |
2037 | kernel_version = env->os_release; | |
2038 | } else { | |
2039 | if (uname(&uts) < 0) | |
2040 | goto out_fail; | |
2041 | ||
2042 | kernel_version = uts.release; | |
2043 | } | |
ec5761ea | 2044 | |
aac48647 ET |
2045 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) { |
2046 | snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version); | |
2047 | if (vmlinux_path__add(bf) < 0) | |
2048 | goto out_fail; | |
2049 | } | |
cc612d81 ACM |
2050 | |
2051 | return 0; | |
2052 | ||
2053 | out_fail: | |
2054 | vmlinux_path__exit(); | |
2055 | return -1; | |
2056 | } | |
2057 | ||
3bfe5f81 | 2058 | int setup_list(struct strlist **list, const char *list_str, |
655000e7 ACM |
2059 | const char *list_name) |
2060 | { | |
2061 | if (list_str == NULL) | |
2062 | return 0; | |
2063 | ||
4a77e218 | 2064 | *list = strlist__new(list_str, NULL); |
655000e7 ACM |
2065 | if (!*list) { |
2066 | pr_err("problems parsing %s list\n", list_name); | |
2067 | return -1; | |
2068 | } | |
0bc2f2f7 ACM |
2069 | |
2070 | symbol_conf.has_filter = true; | |
655000e7 ACM |
2071 | return 0; |
2072 | } | |
2073 | ||
e03eaa40 DA |
2074 | int setup_intlist(struct intlist **list, const char *list_str, |
2075 | const char *list_name) | |
2076 | { | |
2077 | if (list_str == NULL) | |
2078 | return 0; | |
2079 | ||
2080 | *list = intlist__new(list_str); | |
2081 | if (!*list) { | |
2082 | pr_err("problems parsing %s list\n", list_name); | |
2083 | return -1; | |
2084 | } | |
2085 | return 0; | |
2086 | } | |
2087 | ||
ec80fde7 ACM |
2088 | static bool symbol__read_kptr_restrict(void) |
2089 | { | |
2090 | bool value = false; | |
38272dc4 | 2091 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); |
ec80fde7 | 2092 | |
38272dc4 WN |
2093 | if (fp != NULL) { |
2094 | char line[8]; | |
ec80fde7 | 2095 | |
38272dc4 | 2096 | if (fgets(line, sizeof(line), fp) != NULL) |
3dbe46c5 | 2097 | value = ((geteuid() != 0) || (getuid() != 0)) ? |
38272dc4 WN |
2098 | (atoi(line) != 0) : |
2099 | (atoi(line) == 2); | |
ec80fde7 | 2100 | |
38272dc4 | 2101 | fclose(fp); |
ec80fde7 ACM |
2102 | } |
2103 | ||
2104 | return value; | |
2105 | } | |
2106 | ||
b01141f4 ACM |
2107 | int symbol__annotation_init(void) |
2108 | { | |
7b366142 ACM |
2109 | if (symbol_conf.init_annotation) |
2110 | return 0; | |
2111 | ||
b01141f4 ACM |
2112 | if (symbol_conf.initialized) { |
2113 | pr_err("Annotation needs to be init before symbol__init()\n"); | |
2114 | return -1; | |
2115 | } | |
2116 | ||
b01141f4 ACM |
2117 | symbol_conf.priv_size += sizeof(struct annotation); |
2118 | symbol_conf.init_annotation = true; | |
2119 | return 0; | |
2120 | } | |
2121 | ||
ce80d3be | 2122 | int symbol__init(struct perf_env *env) |
2446042c | 2123 | { |
ec5761ea DA |
2124 | const char *symfs; |
2125 | ||
85e00b55 JZ |
2126 | if (symbol_conf.initialized) |
2127 | return 0; | |
2128 | ||
9ac3e487 | 2129 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 2130 | |
166ccc9c NK |
2131 | symbol__elf_init(); |
2132 | ||
75be6cf4 ACM |
2133 | if (symbol_conf.sort_by_name) |
2134 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2135 | sizeof(struct symbol)); | |
b32d133a | 2136 | |
0a7e6d1b | 2137 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0) |
2446042c ACM |
2138 | return -1; |
2139 | ||
c410a338 ACM |
2140 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2141 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2142 | return -1; | |
2143 | } | |
2144 | ||
655000e7 ACM |
2145 | if (setup_list(&symbol_conf.dso_list, |
2146 | symbol_conf.dso_list_str, "dso") < 0) | |
2147 | return -1; | |
2148 | ||
2149 | if (setup_list(&symbol_conf.comm_list, | |
2150 | symbol_conf.comm_list_str, "comm") < 0) | |
2151 | goto out_free_dso_list; | |
2152 | ||
e03eaa40 DA |
2153 | if (setup_intlist(&symbol_conf.pid_list, |
2154 | symbol_conf.pid_list_str, "pid") < 0) | |
2155 | goto out_free_comm_list; | |
2156 | ||
2157 | if (setup_intlist(&symbol_conf.tid_list, | |
2158 | symbol_conf.tid_list_str, "tid") < 0) | |
2159 | goto out_free_pid_list; | |
2160 | ||
655000e7 ACM |
2161 | if (setup_list(&symbol_conf.sym_list, |
2162 | symbol_conf.sym_list_str, "symbol") < 0) | |
e03eaa40 | 2163 | goto out_free_tid_list; |
655000e7 | 2164 | |
64eff7d9 DA |
2165 | if (setup_list(&symbol_conf.bt_stop_list, |
2166 | symbol_conf.bt_stop_list_str, "symbol") < 0) | |
2167 | goto out_free_sym_list; | |
2168 | ||
ec5761ea DA |
2169 | /* |
2170 | * A path to symbols of "/" is identical to "" | |
2171 | * reset here for simplicity. | |
2172 | */ | |
2173 | symfs = realpath(symbol_conf.symfs, NULL); | |
2174 | if (symfs == NULL) | |
2175 | symfs = symbol_conf.symfs; | |
2176 | if (strcmp(symfs, "/") == 0) | |
2177 | symbol_conf.symfs = ""; | |
2178 | if (symfs != symbol_conf.symfs) | |
2179 | free((void *)symfs); | |
2180 | ||
ec80fde7 ACM |
2181 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2182 | ||
85e00b55 | 2183 | symbol_conf.initialized = true; |
4aa65636 | 2184 | return 0; |
655000e7 | 2185 | |
64eff7d9 DA |
2186 | out_free_sym_list: |
2187 | strlist__delete(symbol_conf.sym_list); | |
e03eaa40 DA |
2188 | out_free_tid_list: |
2189 | intlist__delete(symbol_conf.tid_list); | |
2190 | out_free_pid_list: | |
2191 | intlist__delete(symbol_conf.pid_list); | |
655000e7 ACM |
2192 | out_free_comm_list: |
2193 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
2194 | out_free_dso_list: |
2195 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 2196 | return -1; |
4aa65636 ACM |
2197 | } |
2198 | ||
d65a458b ACM |
2199 | void symbol__exit(void) |
2200 | { | |
85e00b55 JZ |
2201 | if (!symbol_conf.initialized) |
2202 | return; | |
64eff7d9 | 2203 | strlist__delete(symbol_conf.bt_stop_list); |
d65a458b ACM |
2204 | strlist__delete(symbol_conf.sym_list); |
2205 | strlist__delete(symbol_conf.dso_list); | |
2206 | strlist__delete(symbol_conf.comm_list); | |
e03eaa40 DA |
2207 | intlist__delete(symbol_conf.tid_list); |
2208 | intlist__delete(symbol_conf.pid_list); | |
d65a458b ACM |
2209 | vmlinux_path__exit(); |
2210 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
64eff7d9 | 2211 | symbol_conf.bt_stop_list = NULL; |
85e00b55 | 2212 | symbol_conf.initialized = false; |
d65a458b | 2213 | } |
a7066709 HK |
2214 | |
2215 | int symbol__config_symfs(const struct option *opt __maybe_unused, | |
2216 | const char *dir, int unset __maybe_unused) | |
2217 | { | |
2218 | char *bf = NULL; | |
2219 | int ret; | |
2220 | ||
2221 | symbol_conf.symfs = strdup(dir); | |
2222 | if (symbol_conf.symfs == NULL) | |
2223 | return -ENOMEM; | |
2224 | ||
2225 | /* skip the locally configured cache if a symfs is given, and | |
2226 | * config buildid dir to symfs/.debug | |
2227 | */ | |
2228 | ret = asprintf(&bf, "%s/%s", dir, ".debug"); | |
2229 | if (ret < 0) | |
2230 | return -ENOMEM; | |
2231 | ||
2232 | set_buildid_dir(bf); | |
2233 | ||
2234 | free(bf); | |
2235 | return 0; | |
2236 | } | |
9f87498f JO |
2237 | |
2238 | struct mem_info *mem_info__get(struct mem_info *mi) | |
2239 | { | |
2240 | if (mi) | |
2241 | refcount_inc(&mi->refcnt); | |
2242 | return mi; | |
2243 | } | |
2244 | ||
2245 | void mem_info__put(struct mem_info *mi) | |
2246 | { | |
2247 | if (mi && refcount_dec_and_test(&mi->refcnt)) | |
2248 | free(mi); | |
2249 | } | |
2250 | ||
2251 | struct mem_info *mem_info__new(void) | |
2252 | { | |
2253 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
2254 | ||
2255 | if (mi) | |
2256 | refcount_set(&mi->refcnt, 1); | |
2257 | return mi; | |
2258 | } |