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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, |
b32d133a ACM |
49 | }; |
50 | ||
44f24cb3 JO |
51 | static enum dso_binary_type binary_type_symtab[] = { |
52 | DSO_BINARY_TYPE__KALLSYMS, | |
53 | DSO_BINARY_TYPE__GUEST_KALLSYMS, | |
54 | DSO_BINARY_TYPE__JAVA_JIT, | |
55 | DSO_BINARY_TYPE__DEBUGLINK, | |
56 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
d2396999 | 57 | DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO, |
44f24cb3 JO |
58 | DSO_BINARY_TYPE__FEDORA_DEBUGINFO, |
59 | DSO_BINARY_TYPE__UBUNTU_DEBUGINFO, | |
60 | DSO_BINARY_TYPE__BUILDID_DEBUGINFO, | |
61 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
62 | DSO_BINARY_TYPE__GUEST_KMODULE, | |
c00c48fc | 63 | DSO_BINARY_TYPE__GUEST_KMODULE_COMP, |
44f24cb3 | 64 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE, |
c00c48fc | 65 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP, |
9cd00941 | 66 | DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO, |
44f24cb3 JO |
67 | DSO_BINARY_TYPE__NOT_FOUND, |
68 | }; | |
69 | ||
028df767 | 70 | #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab) |
44f24cb3 | 71 | |
36a3e646 | 72 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee | 73 | { |
31877908 AB |
74 | symbol_type = toupper(symbol_type); |
75 | ||
6893d4ee ACM |
76 | switch (map_type) { |
77 | case MAP__FUNCTION: | |
78 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 | 79 | case MAP__VARIABLE: |
31877908 | 80 | return symbol_type == 'D'; |
6893d4ee ACM |
81 | default: |
82 | return false; | |
83 | } | |
84 | } | |
85 | ||
694bf407 AB |
86 | static int prefix_underscores_count(const char *str) |
87 | { | |
88 | const char *tail = str; | |
89 | ||
90 | while (*tail == '_') | |
91 | tail++; | |
92 | ||
93 | return tail - str; | |
94 | } | |
95 | ||
d8040645 PC |
96 | int __weak arch__compare_symbol_names(const char *namea, const char *nameb) |
97 | { | |
98 | return strcmp(namea, nameb); | |
99 | } | |
100 | ||
101 | int __weak arch__compare_symbol_names_n(const char *namea, const char *nameb, | |
102 | unsigned int n) | |
103 | { | |
104 | return strncmp(namea, nameb, n); | |
105 | } | |
106 | ||
fb6d5942 NR |
107 | int __weak arch__choose_best_symbol(struct symbol *syma, |
108 | struct symbol *symb __maybe_unused) | |
109 | { | |
110 | /* Avoid "SyS" kernel syscall aliases */ | |
111 | if (strlen(syma->name) >= 3 && !strncmp(syma->name, "SyS", 3)) | |
112 | return SYMBOL_B; | |
113 | if (strlen(syma->name) >= 10 && !strncmp(syma->name, "compat_SyS", 10)) | |
114 | return SYMBOL_B; | |
115 | ||
116 | return SYMBOL_A; | |
117 | } | |
694bf407 AB |
118 | |
119 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
120 | { | |
121 | s64 a; | |
122 | s64 b; | |
3445432b | 123 | size_t na, nb; |
694bf407 AB |
124 | |
125 | /* Prefer a symbol with non zero length */ | |
126 | a = syma->end - syma->start; | |
127 | b = symb->end - symb->start; | |
128 | if ((b == 0) && (a > 0)) | |
129 | return SYMBOL_A; | |
130 | else if ((a == 0) && (b > 0)) | |
131 | return SYMBOL_B; | |
132 | ||
133 | /* Prefer a non weak symbol over a weak one */ | |
134 | a = syma->binding == STB_WEAK; | |
135 | b = symb->binding == STB_WEAK; | |
136 | if (b && !a) | |
137 | return SYMBOL_A; | |
138 | if (a && !b) | |
139 | return SYMBOL_B; | |
140 | ||
141 | /* Prefer a global symbol over a non global one */ | |
142 | a = syma->binding == STB_GLOBAL; | |
143 | b = symb->binding == STB_GLOBAL; | |
144 | if (a && !b) | |
145 | return SYMBOL_A; | |
146 | if (b && !a) | |
147 | return SYMBOL_B; | |
148 | ||
149 | /* Prefer a symbol with less underscores */ | |
150 | a = prefix_underscores_count(syma->name); | |
151 | b = prefix_underscores_count(symb->name); | |
152 | if (b > a) | |
153 | return SYMBOL_A; | |
154 | else if (a > b) | |
155 | return SYMBOL_B; | |
156 | ||
3445432b AH |
157 | /* Choose the symbol with the longest name */ |
158 | na = strlen(syma->name); | |
159 | nb = strlen(symb->name); | |
160 | if (na > nb) | |
694bf407 | 161 | return SYMBOL_A; |
3445432b | 162 | else if (na < nb) |
694bf407 | 163 | return SYMBOL_B; |
3445432b | 164 | |
fb6d5942 | 165 | return arch__choose_best_symbol(syma, symb); |
694bf407 AB |
166 | } |
167 | ||
e5a1845f | 168 | void symbols__fixup_duplicate(struct rb_root *symbols) |
694bf407 AB |
169 | { |
170 | struct rb_node *nd; | |
171 | struct symbol *curr, *next; | |
172 | ||
c97b40e4 ACM |
173 | if (symbol_conf.allow_aliases) |
174 | return; | |
175 | ||
694bf407 AB |
176 | nd = rb_first(symbols); |
177 | ||
178 | while (nd) { | |
179 | curr = rb_entry(nd, struct symbol, rb_node); | |
180 | again: | |
181 | nd = rb_next(&curr->rb_node); | |
182 | next = rb_entry(nd, struct symbol, rb_node); | |
183 | ||
184 | if (!nd) | |
185 | break; | |
186 | ||
187 | if (curr->start != next->start) | |
188 | continue; | |
189 | ||
190 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
191 | rb_erase(&next->rb_node, symbols); | |
d4f74eb8 | 192 | symbol__delete(next); |
694bf407 AB |
193 | goto again; |
194 | } else { | |
195 | nd = rb_next(&curr->rb_node); | |
196 | rb_erase(&curr->rb_node, symbols); | |
d4f74eb8 | 197 | symbol__delete(curr); |
694bf407 AB |
198 | } |
199 | } | |
200 | } | |
201 | ||
e5a1845f | 202 | void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 203 | { |
aeafcbaf | 204 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 205 | struct symbol *curr, *prev; |
af427bf5 ACM |
206 | |
207 | if (prevnd == NULL) | |
208 | return; | |
209 | ||
2e538c4a ACM |
210 | curr = rb_entry(prevnd, struct symbol, rb_node); |
211 | ||
af427bf5 | 212 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
213 | prev = curr; |
214 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 215 | |
3b01a413 | 216 | if (prev->end == prev->start && prev->end != curr->start) |
2c241bd3 | 217 | prev->end = curr->start; |
af427bf5 | 218 | } |
2e538c4a ACM |
219 | |
220 | /* Last entry */ | |
221 | if (curr->end == curr->start) | |
e7ede72a | 222 | curr->end = roundup(curr->start, 4096) + 4096; |
af427bf5 ACM |
223 | } |
224 | ||
e5a1845f | 225 | void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 | 226 | { |
1eee78ae | 227 | struct maps *maps = &mg->maps[type]; |
4bb7123d | 228 | struct map *next, *curr; |
af427bf5 | 229 | |
6a2ffcdd ACM |
230 | pthread_rwlock_wrlock(&maps->lock); |
231 | ||
4bb7123d ACM |
232 | curr = maps__first(maps); |
233 | if (curr == NULL) | |
6a2ffcdd | 234 | goto out_unlock; |
af427bf5 | 235 | |
4bb7123d | 236 | for (next = map__next(curr); next; next = map__next(curr)) { |
9ad4652b TR |
237 | if (!curr->end) |
238 | curr->end = next->start; | |
4bb7123d | 239 | curr = next; |
2e538c4a | 240 | } |
90c83218 ACM |
241 | |
242 | /* | |
243 | * We still haven't the actual symbols, so guess the | |
244 | * last map final address. | |
245 | */ | |
9ad4652b TR |
246 | if (!curr->end) |
247 | curr->end = ~0ULL; | |
6a2ffcdd ACM |
248 | |
249 | out_unlock: | |
250 | pthread_rwlock_unlock(&maps->lock); | |
af427bf5 ACM |
251 | } |
252 | ||
e5a1845f | 253 | struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name) |
a2928c42 | 254 | { |
0085c954 | 255 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
256 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
257 | sizeof(*sym) + namelen)); | |
258 | if (sym == NULL) | |
0b73da3f IM |
259 | return NULL; |
260 | ||
b01141f4 ACM |
261 | if (symbol_conf.priv_size) { |
262 | if (symbol_conf.init_annotation) { | |
263 | struct annotation *notes = (void *)sym; | |
264 | pthread_mutex_init(¬es->lock, NULL); | |
265 | } | |
aeafcbaf | 266 | sym = ((void *)sym) + symbol_conf.priv_size; |
b01141f4 | 267 | } |
e4204992 | 268 | |
aeafcbaf | 269 | sym->start = start; |
2c241bd3 | 270 | sym->end = len ? start + len : start; |
aeafcbaf ACM |
271 | sym->binding = binding; |
272 | sym->namelen = namelen - 1; | |
e4204992 | 273 | |
aeafcbaf ACM |
274 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
275 | __func__, name, start, sym->end); | |
276 | memcpy(sym->name, name, namelen); | |
a2928c42 | 277 | |
aeafcbaf | 278 | return sym; |
a2928c42 ACM |
279 | } |
280 | ||
aeafcbaf | 281 | void symbol__delete(struct symbol *sym) |
a2928c42 | 282 | { |
aeafcbaf | 283 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
284 | } |
285 | ||
cdd059d7 | 286 | void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
287 | { |
288 | struct symbol *pos; | |
aeafcbaf | 289 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
290 | |
291 | while (next) { | |
292 | pos = rb_entry(next, struct symbol, rb_node); | |
293 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 294 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 295 | symbol__delete(pos); |
a2928c42 ACM |
296 | } |
297 | } | |
298 | ||
608c34de | 299 | void __symbols__insert(struct rb_root *symbols, struct symbol *sym, bool kernel) |
a2928c42 | 300 | { |
aeafcbaf | 301 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 302 | struct rb_node *parent = NULL; |
9cffa8d5 | 303 | const u64 ip = sym->start; |
a2928c42 ACM |
304 | struct symbol *s; |
305 | ||
608c34de ACM |
306 | if (kernel) { |
307 | const char *name = sym->name; | |
308 | /* | |
309 | * ppc64 uses function descriptors and appends a '.' to the | |
310 | * start of every instruction address. Remove it. | |
311 | */ | |
312 | if (name[0] == '.') | |
313 | name++; | |
314 | sym->idle = symbol__is_idle(name); | |
315 | } | |
316 | ||
a2928c42 ACM |
317 | while (*p != NULL) { |
318 | parent = *p; | |
319 | s = rb_entry(parent, struct symbol, rb_node); | |
320 | if (ip < s->start) | |
321 | p = &(*p)->rb_left; | |
322 | else | |
323 | p = &(*p)->rb_right; | |
324 | } | |
325 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 326 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
327 | } |
328 | ||
608c34de ACM |
329 | void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
330 | { | |
331 | __symbols__insert(symbols, sym, false); | |
332 | } | |
333 | ||
aeafcbaf | 334 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
335 | { |
336 | struct rb_node *n; | |
337 | ||
aeafcbaf | 338 | if (symbols == NULL) |
a2928c42 ACM |
339 | return NULL; |
340 | ||
aeafcbaf | 341 | n = symbols->rb_node; |
a2928c42 ACM |
342 | |
343 | while (n) { | |
344 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
345 | ||
346 | if (ip < s->start) | |
347 | n = n->rb_left; | |
9c7b37cd | 348 | else if (ip > s->end || (ip == s->end && ip != s->start)) |
a2928c42 ACM |
349 | n = n->rb_right; |
350 | else | |
351 | return s; | |
352 | } | |
353 | ||
354 | return NULL; | |
355 | } | |
356 | ||
8e0cf965 AH |
357 | static struct symbol *symbols__first(struct rb_root *symbols) |
358 | { | |
359 | struct rb_node *n = rb_first(symbols); | |
360 | ||
361 | if (n) | |
362 | return rb_entry(n, struct symbol, rb_node); | |
363 | ||
364 | return NULL; | |
365 | } | |
366 | ||
cd67f99f AH |
367 | static struct symbol *symbols__last(struct rb_root *symbols) |
368 | { | |
369 | struct rb_node *n = rb_last(symbols); | |
370 | ||
371 | if (n) | |
372 | return rb_entry(n, struct symbol, rb_node); | |
373 | ||
374 | return NULL; | |
375 | } | |
376 | ||
9c00a81b AH |
377 | static struct symbol *symbols__next(struct symbol *sym) |
378 | { | |
379 | struct rb_node *n = rb_next(&sym->rb_node); | |
380 | ||
381 | if (n) | |
382 | return rb_entry(n, struct symbol, rb_node); | |
383 | ||
384 | return NULL; | |
385 | } | |
386 | ||
aeafcbaf | 387 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 388 | { |
aeafcbaf | 389 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 390 | struct rb_node *parent = NULL; |
02a9d037 RV |
391 | struct symbol_name_rb_node *symn, *s; |
392 | ||
393 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
394 | |
395 | while (*p != NULL) { | |
396 | parent = *p; | |
397 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
398 | if (strcmp(sym->name, s->sym.name) < 0) | |
399 | p = &(*p)->rb_left; | |
400 | else | |
401 | p = &(*p)->rb_right; | |
402 | } | |
403 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 404 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
405 | } |
406 | ||
aeafcbaf ACM |
407 | static void symbols__sort_by_name(struct rb_root *symbols, |
408 | struct rb_root *source) | |
79406cd7 ACM |
409 | { |
410 | struct rb_node *nd; | |
411 | ||
412 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
413 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 414 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
415 | } |
416 | } | |
417 | ||
d8040645 PC |
418 | int symbol__match_symbol_name(const char *name, const char *str, |
419 | enum symbol_tag_include includes) | |
420 | { | |
421 | const char *versioning; | |
422 | ||
423 | if (includes == SYMBOL_TAG_INCLUDE__DEFAULT_ONLY && | |
424 | (versioning = strstr(name, "@@"))) { | |
425 | int len = strlen(str); | |
426 | ||
427 | if (len < versioning - name) | |
428 | len = versioning - name; | |
429 | ||
430 | return arch__compare_symbol_names_n(name, str, len); | |
431 | } else | |
432 | return arch__compare_symbol_names(name, str); | |
433 | } | |
434 | ||
aeafcbaf | 435 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
d8040645 PC |
436 | const char *name, |
437 | enum symbol_tag_include includes) | |
79406cd7 ACM |
438 | { |
439 | struct rb_node *n; | |
5bcaaca3 | 440 | struct symbol_name_rb_node *s = NULL; |
79406cd7 | 441 | |
aeafcbaf | 442 | if (symbols == NULL) |
79406cd7 ACM |
443 | return NULL; |
444 | ||
aeafcbaf | 445 | n = symbols->rb_node; |
79406cd7 ACM |
446 | |
447 | while (n) { | |
79406cd7 ACM |
448 | int cmp; |
449 | ||
450 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
d8040645 | 451 | cmp = symbol__match_symbol_name(s->sym.name, name, includes); |
79406cd7 | 452 | |
d8040645 | 453 | if (cmp > 0) |
79406cd7 | 454 | n = n->rb_left; |
d8040645 | 455 | else if (cmp < 0) |
79406cd7 ACM |
456 | n = n->rb_right; |
457 | else | |
de480999 | 458 | break; |
79406cd7 ACM |
459 | } |
460 | ||
de480999 NK |
461 | if (n == NULL) |
462 | return NULL; | |
463 | ||
d8040645 PC |
464 | if (includes != SYMBOL_TAG_INCLUDE__DEFAULT_ONLY) |
465 | /* return first symbol that has same name (if any) */ | |
466 | for (n = rb_prev(n); n; n = rb_prev(n)) { | |
467 | struct symbol_name_rb_node *tmp; | |
de480999 | 468 | |
d8040645 PC |
469 | tmp = rb_entry(n, struct symbol_name_rb_node, rb_node); |
470 | if (arch__compare_symbol_names(tmp->sym.name, s->sym.name)) | |
471 | break; | |
de480999 | 472 | |
d8040645 PC |
473 | s = tmp; |
474 | } | |
de480999 NK |
475 | |
476 | return &s->sym; | |
79406cd7 ACM |
477 | } |
478 | ||
c0b4dffb ACM |
479 | void dso__reset_find_symbol_cache(struct dso *dso) |
480 | { | |
481 | enum map_type type; | |
482 | ||
483 | for (type = MAP__FUNCTION; type <= MAP__VARIABLE; ++type) { | |
484 | dso->last_find_result[type].addr = 0; | |
485 | dso->last_find_result[type].symbol = NULL; | |
486 | } | |
487 | } | |
488 | ||
ae93a6c7 CP |
489 | void dso__insert_symbol(struct dso *dso, enum map_type type, struct symbol *sym) |
490 | { | |
608c34de | 491 | __symbols__insert(&dso->symbols[type], sym, dso->kernel); |
ae93a6c7 CP |
492 | |
493 | /* update the symbol cache if necessary */ | |
494 | if (dso->last_find_result[type].addr >= sym->start && | |
495 | (dso->last_find_result[type].addr < sym->end || | |
496 | sym->start == sym->end)) { | |
497 | dso->last_find_result[type].symbol = sym; | |
498 | } | |
499 | } | |
500 | ||
aeafcbaf | 501 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 502 | enum map_type type, u64 addr) |
fcf1203a | 503 | { |
b843f62a | 504 | if (dso->last_find_result[type].addr != addr || dso->last_find_result[type].symbol == NULL) { |
b685ac22 ACM |
505 | dso->last_find_result[type].addr = addr; |
506 | dso->last_find_result[type].symbol = symbols__find(&dso->symbols[type], addr); | |
507 | } | |
508 | ||
509 | return dso->last_find_result[type].symbol; | |
fcf1203a ACM |
510 | } |
511 | ||
9c00a81b | 512 | struct symbol *dso__first_symbol(struct dso *dso, enum map_type type) |
8e0cf965 AH |
513 | { |
514 | return symbols__first(&dso->symbols[type]); | |
9c00a81b AH |
515 | } |
516 | ||
cd67f99f AH |
517 | struct symbol *dso__last_symbol(struct dso *dso, enum map_type type) |
518 | { | |
519 | return symbols__last(&dso->symbols[type]); | |
520 | } | |
521 | ||
9c00a81b AH |
522 | struct symbol *dso__next_symbol(struct symbol *sym) |
523 | { | |
524 | return symbols__next(sym); | |
8e0cf965 AH |
525 | } |
526 | ||
18bd7264 ACM |
527 | struct symbol *symbol__next_by_name(struct symbol *sym) |
528 | { | |
529 | struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym); | |
530 | struct rb_node *n = rb_next(&s->rb_node); | |
531 | ||
532 | return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL; | |
533 | } | |
534 | ||
535 | /* | |
536 | * Teturns first symbol that matched with @name. | |
537 | */ | |
aeafcbaf | 538 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
539 | const char *name) |
540 | { | |
d8040645 PC |
541 | struct symbol *s = symbols__find_by_name(&dso->symbol_names[type], name, |
542 | SYMBOL_TAG_INCLUDE__NONE); | |
543 | if (!s) | |
544 | s = symbols__find_by_name(&dso->symbol_names[type], name, | |
545 | SYMBOL_TAG_INCLUDE__DEFAULT_ONLY); | |
546 | return s; | |
79406cd7 ACM |
547 | } |
548 | ||
aeafcbaf | 549 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 550 | { |
aeafcbaf ACM |
551 | dso__set_sorted_by_name(dso, type); |
552 | return symbols__sort_by_name(&dso->symbol_names[type], | |
553 | &dso->symbols[type]); | |
79406cd7 ACM |
554 | } |
555 | ||
316d70d6 AH |
556 | int modules__parse(const char *filename, void *arg, |
557 | int (*process_module)(void *arg, const char *name, | |
9ad4652b | 558 | u64 start, u64 size)) |
316d70d6 AH |
559 | { |
560 | char *line = NULL; | |
561 | size_t n; | |
562 | FILE *file; | |
563 | int err = 0; | |
564 | ||
565 | file = fopen(filename, "r"); | |
566 | if (file == NULL) | |
567 | return -1; | |
568 | ||
569 | while (1) { | |
570 | char name[PATH_MAX]; | |
9ad4652b TR |
571 | u64 start, size; |
572 | char *sep, *endptr; | |
316d70d6 AH |
573 | ssize_t line_len; |
574 | ||
575 | line_len = getline(&line, &n, file); | |
576 | if (line_len < 0) { | |
577 | if (feof(file)) | |
578 | break; | |
579 | err = -1; | |
580 | goto out; | |
581 | } | |
582 | ||
583 | if (!line) { | |
584 | err = -1; | |
585 | goto out; | |
586 | } | |
587 | ||
588 | line[--line_len] = '\0'; /* \n */ | |
589 | ||
590 | sep = strrchr(line, 'x'); | |
591 | if (sep == NULL) | |
592 | continue; | |
593 | ||
594 | hex2u64(sep + 1, &start); | |
595 | ||
596 | sep = strchr(line, ' '); | |
597 | if (sep == NULL) | |
598 | continue; | |
599 | ||
600 | *sep = '\0'; | |
601 | ||
602 | scnprintf(name, sizeof(name), "[%s]", line); | |
603 | ||
9ad4652b TR |
604 | size = strtoul(sep + 1, &endptr, 0); |
605 | if (*endptr != ' ' && *endptr != '\t') | |
606 | continue; | |
607 | ||
608 | err = process_module(arg, name, start, size); | |
316d70d6 AH |
609 | if (err) |
610 | break; | |
611 | } | |
612 | out: | |
613 | free(line); | |
614 | fclose(file); | |
615 | return err; | |
616 | } | |
617 | ||
682b335a ACM |
618 | struct process_kallsyms_args { |
619 | struct map *map; | |
620 | struct dso *dso; | |
621 | }; | |
622 | ||
e7110b9f ACM |
623 | /* |
624 | * These are symbols in the kernel image, so make sure that | |
625 | * sym is from a kernel DSO. | |
626 | */ | |
608c34de | 627 | static bool symbol__is_idle(const char *name) |
82d1deb0 DA |
628 | { |
629 | const char * const idle_symbols[] = { | |
630 | "cpu_idle", | |
e0336ed6 | 631 | "cpu_startup_entry", |
82d1deb0 DA |
632 | "intel_idle", |
633 | "default_idle", | |
634 | "native_safe_halt", | |
635 | "enter_idle", | |
636 | "exit_idle", | |
637 | "mwait_idle", | |
638 | "mwait_idle_with_hints", | |
639 | "poll_idle", | |
640 | "ppc64_runlatch_off", | |
641 | "pseries_dedicated_idle_sleep", | |
642 | NULL | |
643 | }; | |
82d1deb0 DA |
644 | int i; |
645 | ||
82d1deb0 | 646 | for (i = 0; idle_symbols[i]; i++) { |
608c34de | 647 | if (!strcmp(idle_symbols[i], name)) |
82d1deb0 DA |
648 | return true; |
649 | } | |
650 | ||
651 | return false; | |
652 | } | |
653 | ||
682b335a | 654 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 655 | char type, u64 start) |
682b335a ACM |
656 | { |
657 | struct symbol *sym; | |
658 | struct process_kallsyms_args *a = arg; | |
659 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
660 | ||
661 | if (!symbol_type__is_a(type, a->map->type)) | |
662 | return 0; | |
663 | ||
82151520 CS |
664 | /* |
665 | * module symbols are not sorted so we add all | |
666 | * symbols, setting length to 0, and rely on | |
667 | * symbols__fixup_end() to fix it up. | |
668 | */ | |
8e947f1e | 669 | sym = symbol__new(start, 0, kallsyms2elf_binding(type), name); |
682b335a ACM |
670 | if (sym == NULL) |
671 | return -ENOMEM; | |
672 | /* | |
673 | * We will pass the symbols to the filter later, in | |
674 | * map__split_kallsyms, when we have split the maps per module | |
675 | */ | |
608c34de | 676 | __symbols__insert(root, sym, !strchr(name, '[')); |
a1645ce1 | 677 | |
682b335a ACM |
678 | return 0; |
679 | } | |
680 | ||
681 | /* | |
682 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
683 | * so that we can in the next step set the symbol ->end address and then | |
684 | * call kernel_maps__split_kallsyms. | |
685 | */ | |
aeafcbaf | 686 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 687 | struct map *map) |
682b335a | 688 | { |
aeafcbaf | 689 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 690 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
691 | } |
692 | ||
be39db9f | 693 | static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map) |
8e0cf965 | 694 | { |
ba92732e | 695 | struct map_groups *kmaps = map__kmaps(map); |
8e0cf965 AH |
696 | struct map *curr_map; |
697 | struct symbol *pos; | |
866548dd AH |
698 | int count = 0; |
699 | struct rb_root old_root = dso->symbols[map->type]; | |
8e0cf965 AH |
700 | struct rb_root *root = &dso->symbols[map->type]; |
701 | struct rb_node *next = rb_first(root); | |
702 | ||
ba92732e WN |
703 | if (!kmaps) |
704 | return -1; | |
705 | ||
866548dd AH |
706 | *root = RB_ROOT; |
707 | ||
8e0cf965 AH |
708 | while (next) { |
709 | char *module; | |
710 | ||
711 | pos = rb_entry(next, struct symbol, rb_node); | |
712 | next = rb_next(&pos->rb_node); | |
713 | ||
866548dd AH |
714 | rb_erase_init(&pos->rb_node, &old_root); |
715 | ||
8e0cf965 AH |
716 | module = strchr(pos->name, '\t'); |
717 | if (module) | |
718 | *module = '\0'; | |
719 | ||
720 | curr_map = map_groups__find(kmaps, map->type, pos->start); | |
721 | ||
be39db9f | 722 | if (!curr_map) { |
8e0cf965 | 723 | symbol__delete(pos); |
866548dd | 724 | continue; |
8e0cf965 | 725 | } |
866548dd AH |
726 | |
727 | pos->start -= curr_map->start - curr_map->pgoff; | |
728 | if (pos->end) | |
729 | pos->end -= curr_map->start - curr_map->pgoff; | |
730 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
731 | ++count; | |
8e0cf965 AH |
732 | } |
733 | ||
734 | /* Symbols have been adjusted */ | |
735 | dso->adjust_symbols = 1; | |
736 | ||
866548dd | 737 | return count; |
8e0cf965 AH |
738 | } |
739 | ||
2e538c4a ACM |
740 | /* |
741 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
742 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
743 | * the original ELF section names vmlinux have. | |
744 | */ | |
be39db9f | 745 | static int dso__split_kallsyms(struct dso *dso, struct map *map, u64 delta) |
2e538c4a | 746 | { |
ba92732e WN |
747 | struct map_groups *kmaps = map__kmaps(map); |
748 | struct machine *machine; | |
4e06255f | 749 | struct map *curr_map = map; |
2e538c4a | 750 | struct symbol *pos; |
48000a1a | 751 | int count = 0, moved = 0; |
aeafcbaf | 752 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 753 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
754 | int kernel_range = 0; |
755 | ||
ba92732e WN |
756 | if (!kmaps) |
757 | return -1; | |
758 | ||
759 | machine = kmaps->machine; | |
760 | ||
2e538c4a ACM |
761 | while (next) { |
762 | char *module; | |
763 | ||
764 | pos = rb_entry(next, struct symbol, rb_node); | |
765 | next = rb_next(&pos->rb_node); | |
766 | ||
767 | module = strchr(pos->name, '\t'); | |
768 | if (module) { | |
75be6cf4 | 769 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
770 | goto discard_symbol; |
771 | ||
2e538c4a ACM |
772 | *module++ = '\0'; |
773 | ||
b7cece76 | 774 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 775 | if (curr_map != map && |
aeafcbaf | 776 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 777 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
778 | /* |
779 | * We assume all symbols of a module are | |
780 | * continuous in * kallsyms, so curr_map | |
781 | * points to a module and all its | |
782 | * symbols are in its kmap. Mark it as | |
783 | * loaded. | |
784 | */ | |
785 | dso__set_loaded(curr_map->dso, | |
786 | curr_map->type); | |
787 | } | |
788 | ||
789 | curr_map = map_groups__find_by_name(kmaps, | |
790 | map->type, module); | |
4e06255f | 791 | if (curr_map == NULL) { |
2f51903b | 792 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 793 | "inconsistency while looking " |
a1645ce1 | 794 | "for \"%s\" module!\n", |
23346f21 | 795 | machine->root_dir, module); |
a1645ce1 ZY |
796 | curr_map = map; |
797 | goto discard_symbol; | |
af427bf5 | 798 | } |
b7cece76 | 799 | |
a1645ce1 | 800 | if (curr_map->dso->loaded && |
23346f21 | 801 | !machine__is_default_guest(machine)) |
b7cece76 | 802 | goto discard_symbol; |
af427bf5 | 803 | } |
2e538c4a ACM |
804 | /* |
805 | * So that we look just like we get from .ko files, | |
806 | * i.e. not prelinked, relative to map->start. | |
807 | */ | |
4e06255f ACM |
808 | pos->start = curr_map->map_ip(curr_map, pos->start); |
809 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
810 | } else if (curr_map != map) { | |
2e538c4a | 811 | char dso_name[PATH_MAX]; |
aeafcbaf | 812 | struct dso *ndso; |
2e538c4a | 813 | |
d9b62aba AH |
814 | if (delta) { |
815 | /* Kernel was relocated at boot time */ | |
816 | pos->start -= delta; | |
817 | pos->end -= delta; | |
818 | } | |
819 | ||
8a953312 ACM |
820 | if (count == 0) { |
821 | curr_map = map; | |
be39db9f | 822 | goto add_symbol; |
8a953312 ACM |
823 | } |
824 | ||
aeafcbaf | 825 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
826 | snprintf(dso_name, sizeof(dso_name), |
827 | "[guest.kernel].%d", | |
828 | kernel_range++); | |
829 | else | |
830 | snprintf(dso_name, sizeof(dso_name), | |
831 | "[kernel].%d", | |
832 | kernel_range++); | |
2e538c4a | 833 | |
aeafcbaf ACM |
834 | ndso = dso__new(dso_name); |
835 | if (ndso == NULL) | |
2e538c4a ACM |
836 | return -1; |
837 | ||
aeafcbaf | 838 | ndso->kernel = dso->kernel; |
a1645ce1 | 839 | |
aeafcbaf | 840 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 841 | if (curr_map == NULL) { |
d3a7c489 | 842 | dso__put(ndso); |
2e538c4a ACM |
843 | return -1; |
844 | } | |
a2928c42 | 845 | |
4e06255f | 846 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 847 | map_groups__insert(kmaps, curr_map); |
2e538c4a | 848 | ++kernel_range; |
d9b62aba AH |
849 | } else if (delta) { |
850 | /* Kernel was relocated at boot time */ | |
851 | pos->start -= delta; | |
852 | pos->end -= delta; | |
2e538c4a | 853 | } |
be39db9f ACM |
854 | add_symbol: |
855 | if (curr_map != map) { | |
856 | rb_erase(&pos->rb_node, root); | |
857 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
858 | ++moved; | |
859 | } else | |
860 | ++count; | |
861 | ||
862 | continue; | |
863 | discard_symbol: | |
864 | rb_erase(&pos->rb_node, root); | |
865 | symbol__delete(pos); | |
a2928c42 ACM |
866 | } |
867 | ||
a1645ce1 | 868 | if (curr_map != map && |
aeafcbaf | 869 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 870 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
871 | dso__set_loaded(curr_map->dso, curr_map->type); |
872 | } | |
873 | ||
8a953312 | 874 | return count + moved; |
2e538c4a | 875 | } |
a2928c42 | 876 | |
3f067dca ACM |
877 | bool symbol__restricted_filename(const char *filename, |
878 | const char *restricted_filename) | |
ec80fde7 ACM |
879 | { |
880 | bool restricted = false; | |
881 | ||
882 | if (symbol_conf.kptr_restrict) { | |
883 | char *r = realpath(filename, NULL); | |
884 | ||
885 | if (r != NULL) { | |
886 | restricted = strcmp(r, restricted_filename) == 0; | |
887 | free(r); | |
888 | return restricted; | |
889 | } | |
890 | } | |
891 | ||
892 | return restricted; | |
893 | } | |
894 | ||
52afdaf9 AH |
895 | struct module_info { |
896 | struct rb_node rb_node; | |
897 | char *name; | |
898 | u64 start; | |
8e0cf965 AH |
899 | }; |
900 | ||
52afdaf9 | 901 | static void add_module(struct module_info *mi, struct rb_root *modules) |
8e0cf965 | 902 | { |
52afdaf9 AH |
903 | struct rb_node **p = &modules->rb_node; |
904 | struct rb_node *parent = NULL; | |
905 | struct module_info *m; | |
8e0cf965 | 906 | |
52afdaf9 AH |
907 | while (*p != NULL) { |
908 | parent = *p; | |
909 | m = rb_entry(parent, struct module_info, rb_node); | |
910 | if (strcmp(mi->name, m->name) < 0) | |
911 | p = &(*p)->rb_left; | |
912 | else | |
913 | p = &(*p)->rb_right; | |
914 | } | |
915 | rb_link_node(&mi->rb_node, parent, p); | |
916 | rb_insert_color(&mi->rb_node, modules); | |
917 | } | |
918 | ||
919 | static void delete_modules(struct rb_root *modules) | |
920 | { | |
921 | struct module_info *mi; | |
922 | struct rb_node *next = rb_first(modules); | |
923 | ||
924 | while (next) { | |
925 | mi = rb_entry(next, struct module_info, rb_node); | |
926 | next = rb_next(&mi->rb_node); | |
927 | rb_erase(&mi->rb_node, modules); | |
74cf249d | 928 | zfree(&mi->name); |
52afdaf9 AH |
929 | free(mi); |
930 | } | |
931 | } | |
932 | ||
933 | static struct module_info *find_module(const char *name, | |
934 | struct rb_root *modules) | |
935 | { | |
936 | struct rb_node *n = modules->rb_node; | |
937 | ||
938 | while (n) { | |
939 | struct module_info *m; | |
940 | int cmp; | |
941 | ||
942 | m = rb_entry(n, struct module_info, rb_node); | |
943 | cmp = strcmp(name, m->name); | |
944 | if (cmp < 0) | |
945 | n = n->rb_left; | |
946 | else if (cmp > 0) | |
947 | n = n->rb_right; | |
948 | else | |
949 | return m; | |
950 | } | |
951 | ||
952 | return NULL; | |
953 | } | |
954 | ||
9ad4652b TR |
955 | static int __read_proc_modules(void *arg, const char *name, u64 start, |
956 | u64 size __maybe_unused) | |
52afdaf9 AH |
957 | { |
958 | struct rb_root *modules = arg; | |
959 | struct module_info *mi; | |
960 | ||
961 | mi = zalloc(sizeof(struct module_info)); | |
962 | if (!mi) | |
8e0cf965 AH |
963 | return -ENOMEM; |
964 | ||
52afdaf9 AH |
965 | mi->name = strdup(name); |
966 | mi->start = start; | |
8e0cf965 | 967 | |
52afdaf9 AH |
968 | if (!mi->name) { |
969 | free(mi); | |
970 | return -ENOMEM; | |
971 | } | |
972 | ||
973 | add_module(mi, modules); | |
974 | ||
975 | return 0; | |
976 | } | |
977 | ||
978 | static int read_proc_modules(const char *filename, struct rb_root *modules) | |
979 | { | |
980 | if (symbol__restricted_filename(filename, "/proc/modules")) | |
981 | return -1; | |
982 | ||
983 | if (modules__parse(filename, modules, __read_proc_modules)) { | |
984 | delete_modules(modules); | |
985 | return -1; | |
986 | } | |
8e0cf965 AH |
987 | |
988 | return 0; | |
989 | } | |
990 | ||
fc1b691d AH |
991 | int compare_proc_modules(const char *from, const char *to) |
992 | { | |
993 | struct rb_root from_modules = RB_ROOT; | |
994 | struct rb_root to_modules = RB_ROOT; | |
995 | struct rb_node *from_node, *to_node; | |
996 | struct module_info *from_m, *to_m; | |
997 | int ret = -1; | |
998 | ||
999 | if (read_proc_modules(from, &from_modules)) | |
1000 | return -1; | |
1001 | ||
1002 | if (read_proc_modules(to, &to_modules)) | |
1003 | goto out_delete_from; | |
1004 | ||
1005 | from_node = rb_first(&from_modules); | |
1006 | to_node = rb_first(&to_modules); | |
1007 | while (from_node) { | |
1008 | if (!to_node) | |
1009 | break; | |
1010 | ||
1011 | from_m = rb_entry(from_node, struct module_info, rb_node); | |
1012 | to_m = rb_entry(to_node, struct module_info, rb_node); | |
1013 | ||
1014 | if (from_m->start != to_m->start || | |
1015 | strcmp(from_m->name, to_m->name)) | |
1016 | break; | |
1017 | ||
1018 | from_node = rb_next(from_node); | |
1019 | to_node = rb_next(to_node); | |
1020 | } | |
1021 | ||
1022 | if (!from_node && !to_node) | |
1023 | ret = 0; | |
1024 | ||
1025 | delete_modules(&to_modules); | |
1026 | out_delete_from: | |
1027 | delete_modules(&from_modules); | |
1028 | ||
1029 | return ret; | |
1030 | } | |
1031 | ||
52afdaf9 AH |
1032 | static int do_validate_kcore_modules(const char *filename, struct map *map, |
1033 | struct map_groups *kmaps) | |
1034 | { | |
1035 | struct rb_root modules = RB_ROOT; | |
1036 | struct map *old_map; | |
1037 | int err; | |
1038 | ||
1039 | err = read_proc_modules(filename, &modules); | |
1040 | if (err) | |
1041 | return err; | |
1042 | ||
1043 | old_map = map_groups__first(kmaps, map->type); | |
1044 | while (old_map) { | |
1045 | struct map *next = map_groups__next(old_map); | |
1046 | struct module_info *mi; | |
1047 | ||
1048 | if (old_map == map || old_map->start == map->start) { | |
1049 | /* The kernel map */ | |
1050 | old_map = next; | |
1051 | continue; | |
1052 | } | |
1053 | ||
1054 | /* Module must be in memory at the same address */ | |
1055 | mi = find_module(old_map->dso->short_name, &modules); | |
1056 | if (!mi || mi->start != old_map->start) { | |
1057 | err = -EINVAL; | |
1058 | goto out; | |
1059 | } | |
1060 | ||
1061 | old_map = next; | |
1062 | } | |
1063 | out: | |
1064 | delete_modules(&modules); | |
1065 | return err; | |
1066 | } | |
1067 | ||
8e0cf965 | 1068 | /* |
52afdaf9 | 1069 | * If kallsyms is referenced by name then we look for filename in the same |
8e0cf965 AH |
1070 | * directory. |
1071 | */ | |
52afdaf9 AH |
1072 | static bool filename_from_kallsyms_filename(char *filename, |
1073 | const char *base_name, | |
1074 | const char *kallsyms_filename) | |
8e0cf965 AH |
1075 | { |
1076 | char *name; | |
1077 | ||
52afdaf9 AH |
1078 | strcpy(filename, kallsyms_filename); |
1079 | name = strrchr(filename, '/'); | |
8e0cf965 AH |
1080 | if (!name) |
1081 | return false; | |
1082 | ||
52afdaf9 AH |
1083 | name += 1; |
1084 | ||
1085 | if (!strcmp(name, "kallsyms")) { | |
1086 | strcpy(name, base_name); | |
8e0cf965 AH |
1087 | return true; |
1088 | } | |
1089 | ||
1090 | return false; | |
1091 | } | |
1092 | ||
52afdaf9 AH |
1093 | static int validate_kcore_modules(const char *kallsyms_filename, |
1094 | struct map *map) | |
1095 | { | |
ba92732e | 1096 | struct map_groups *kmaps = map__kmaps(map); |
52afdaf9 AH |
1097 | char modules_filename[PATH_MAX]; |
1098 | ||
ba92732e WN |
1099 | if (!kmaps) |
1100 | return -EINVAL; | |
1101 | ||
52afdaf9 AH |
1102 | if (!filename_from_kallsyms_filename(modules_filename, "modules", |
1103 | kallsyms_filename)) | |
1104 | return -EINVAL; | |
1105 | ||
1106 | if (do_validate_kcore_modules(modules_filename, map, kmaps)) | |
1107 | return -EINVAL; | |
1108 | ||
1109 | return 0; | |
1110 | } | |
1111 | ||
a00d28cb AH |
1112 | static int validate_kcore_addresses(const char *kallsyms_filename, |
1113 | struct map *map) | |
1114 | { | |
1115 | struct kmap *kmap = map__kmap(map); | |
1116 | ||
ba92732e WN |
1117 | if (!kmap) |
1118 | return -EINVAL; | |
1119 | ||
a00d28cb AH |
1120 | if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) { |
1121 | u64 start; | |
1122 | ||
b843f62a ACM |
1123 | if (kallsyms__get_function_start(kallsyms_filename, |
1124 | kmap->ref_reloc_sym->name, &start)) | |
1125 | return -ENOENT; | |
a00d28cb AH |
1126 | if (start != kmap->ref_reloc_sym->addr) |
1127 | return -EINVAL; | |
1128 | } | |
1129 | ||
1130 | return validate_kcore_modules(kallsyms_filename, map); | |
1131 | } | |
1132 | ||
52afdaf9 AH |
1133 | struct kcore_mapfn_data { |
1134 | struct dso *dso; | |
1135 | enum map_type type; | |
1136 | struct list_head maps; | |
1137 | }; | |
1138 | ||
1139 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
1140 | { | |
1141 | struct kcore_mapfn_data *md = data; | |
1142 | struct map *map; | |
1143 | ||
1144 | map = map__new2(start, md->dso, md->type); | |
1145 | if (map == NULL) | |
1146 | return -ENOMEM; | |
1147 | ||
1148 | map->end = map->start + len; | |
1149 | map->pgoff = pgoff; | |
1150 | ||
1151 | list_add(&map->node, &md->maps); | |
1152 | ||
1153 | return 0; | |
1154 | } | |
1155 | ||
8e0cf965 AH |
1156 | static int dso__load_kcore(struct dso *dso, struct map *map, |
1157 | const char *kallsyms_filename) | |
1158 | { | |
ba92732e WN |
1159 | struct map_groups *kmaps = map__kmaps(map); |
1160 | struct machine *machine; | |
8e0cf965 AH |
1161 | struct kcore_mapfn_data md; |
1162 | struct map *old_map, *new_map, *replacement_map = NULL; | |
1163 | bool is_64_bit; | |
1164 | int err, fd; | |
1165 | char kcore_filename[PATH_MAX]; | |
1166 | struct symbol *sym; | |
1167 | ||
ba92732e WN |
1168 | if (!kmaps) |
1169 | return -EINVAL; | |
1170 | ||
1171 | machine = kmaps->machine; | |
1172 | ||
8e0cf965 AH |
1173 | /* This function requires that the map is the kernel map */ |
1174 | if (map != machine->vmlinux_maps[map->type]) | |
1175 | return -EINVAL; | |
1176 | ||
52afdaf9 AH |
1177 | if (!filename_from_kallsyms_filename(kcore_filename, "kcore", |
1178 | kallsyms_filename)) | |
1179 | return -EINVAL; | |
1180 | ||
a00d28cb AH |
1181 | /* Modules and kernel must be present at their original addresses */ |
1182 | if (validate_kcore_addresses(kallsyms_filename, map)) | |
8e0cf965 AH |
1183 | return -EINVAL; |
1184 | ||
1185 | md.dso = dso; | |
1186 | md.type = map->type; | |
1187 | INIT_LIST_HEAD(&md.maps); | |
1188 | ||
1189 | fd = open(kcore_filename, O_RDONLY); | |
36c8bb56 | 1190 | if (fd < 0) { |
133de940 AH |
1191 | pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n", |
1192 | kcore_filename); | |
8e0cf965 | 1193 | return -EINVAL; |
36c8bb56 | 1194 | } |
8e0cf965 AH |
1195 | |
1196 | /* Read new maps into temporary lists */ | |
1197 | err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md, | |
1198 | &is_64_bit); | |
1199 | if (err) | |
1200 | goto out_err; | |
c6d8f2a4 | 1201 | dso->is_64_bit = is_64_bit; |
8e0cf965 AH |
1202 | |
1203 | if (list_empty(&md.maps)) { | |
1204 | err = -EINVAL; | |
1205 | goto out_err; | |
1206 | } | |
1207 | ||
1208 | /* Remove old maps */ | |
1209 | old_map = map_groups__first(kmaps, map->type); | |
1210 | while (old_map) { | |
1211 | struct map *next = map_groups__next(old_map); | |
1212 | ||
1213 | if (old_map != map) | |
1214 | map_groups__remove(kmaps, old_map); | |
1215 | old_map = next; | |
1216 | } | |
1217 | ||
1218 | /* Find the kernel map using the first symbol */ | |
1219 | sym = dso__first_symbol(dso, map->type); | |
1220 | list_for_each_entry(new_map, &md.maps, node) { | |
1221 | if (sym && sym->start >= new_map->start && | |
1222 | sym->start < new_map->end) { | |
1223 | replacement_map = new_map; | |
1224 | break; | |
1225 | } | |
1226 | } | |
1227 | ||
1228 | if (!replacement_map) | |
1229 | replacement_map = list_entry(md.maps.next, struct map, node); | |
1230 | ||
1231 | /* Add new maps */ | |
1232 | while (!list_empty(&md.maps)) { | |
1233 | new_map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1234 | list_del_init(&new_map->node); |
8e0cf965 AH |
1235 | if (new_map == replacement_map) { |
1236 | map->start = new_map->start; | |
1237 | map->end = new_map->end; | |
1238 | map->pgoff = new_map->pgoff; | |
1239 | map->map_ip = new_map->map_ip; | |
1240 | map->unmap_ip = new_map->unmap_ip; | |
8e0cf965 | 1241 | /* Ensure maps are correctly ordered */ |
84c2cafa | 1242 | map__get(map); |
8e0cf965 AH |
1243 | map_groups__remove(kmaps, map); |
1244 | map_groups__insert(kmaps, map); | |
84c2cafa | 1245 | map__put(map); |
8e0cf965 AH |
1246 | } else { |
1247 | map_groups__insert(kmaps, new_map); | |
1248 | } | |
84c2cafa ACM |
1249 | |
1250 | map__put(new_map); | |
8e0cf965 AH |
1251 | } |
1252 | ||
1253 | /* | |
1254 | * Set the data type and long name so that kcore can be read via | |
1255 | * dso__data_read_addr(). | |
1256 | */ | |
1257 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
5f70619d | 1258 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE; |
8e0cf965 | 1259 | else |
5f70619d | 1260 | dso->binary_type = DSO_BINARY_TYPE__KCORE; |
7e155d4d | 1261 | dso__set_long_name(dso, strdup(kcore_filename), true); |
8e0cf965 AH |
1262 | |
1263 | close(fd); | |
1264 | ||
1265 | if (map->type == MAP__FUNCTION) | |
1266 | pr_debug("Using %s for kernel object code\n", kcore_filename); | |
1267 | else | |
1268 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
1269 | ||
1270 | return 0; | |
1271 | ||
1272 | out_err: | |
1273 | while (!list_empty(&md.maps)) { | |
1274 | map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1275 | list_del_init(&map->node); |
84c2cafa | 1276 | map__put(map); |
8e0cf965 AH |
1277 | } |
1278 | close(fd); | |
1279 | return -EINVAL; | |
1280 | } | |
1281 | ||
d9b62aba AH |
1282 | /* |
1283 | * If the kernel is relocated at boot time, kallsyms won't match. Compute the | |
1284 | * delta based on the relocation reference symbol. | |
1285 | */ | |
1286 | static int kallsyms__delta(struct map *map, const char *filename, u64 *delta) | |
1287 | { | |
1288 | struct kmap *kmap = map__kmap(map); | |
1289 | u64 addr; | |
1290 | ||
ba92732e WN |
1291 | if (!kmap) |
1292 | return -1; | |
1293 | ||
d9b62aba AH |
1294 | if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name) |
1295 | return 0; | |
1296 | ||
b843f62a | 1297 | if (kallsyms__get_function_start(filename, kmap->ref_reloc_sym->name, &addr)) |
d9b62aba AH |
1298 | return -1; |
1299 | ||
1300 | *delta = addr - kmap->ref_reloc_sym->addr; | |
1301 | return 0; | |
1302 | } | |
1303 | ||
e02092b9 | 1304 | int __dso__load_kallsyms(struct dso *dso, const char *filename, |
be39db9f | 1305 | struct map *map, bool no_kcore) |
2e538c4a | 1306 | { |
d9b62aba AH |
1307 | u64 delta = 0; |
1308 | ||
ec80fde7 ACM |
1309 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1310 | return -1; | |
1311 | ||
aeafcbaf | 1312 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
1313 | return -1; |
1314 | ||
d9b62aba AH |
1315 | if (kallsyms__delta(map, filename, &delta)) |
1316 | return -1; | |
1317 | ||
3f5a4272 | 1318 | symbols__fixup_end(&dso->symbols[map->type]); |
432746f8 | 1319 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 | 1320 | |
aeafcbaf | 1321 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 1322 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 1323 | else |
44f24cb3 | 1324 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 1325 | |
e02092b9 | 1326 | if (!no_kcore && !dso__load_kcore(dso, map, filename)) |
be39db9f | 1327 | return dso__split_kallsyms_for_kcore(dso, map); |
8e0cf965 | 1328 | else |
be39db9f | 1329 | return dso__split_kallsyms(dso, map, delta); |
af427bf5 ACM |
1330 | } |
1331 | ||
e02092b9 | 1332 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
be39db9f | 1333 | struct map *map) |
e02092b9 | 1334 | { |
be39db9f | 1335 | return __dso__load_kallsyms(dso, filename, map, false); |
e02092b9 ACM |
1336 | } |
1337 | ||
bf2e710b KJ |
1338 | static int dso__load_perf_map(const char *map_path, struct dso *dso, |
1339 | struct map *map) | |
80d496be PE |
1340 | { |
1341 | char *line = NULL; | |
1342 | size_t n; | |
1343 | FILE *file; | |
1344 | int nr_syms = 0; | |
1345 | ||
bf2e710b | 1346 | file = fopen(map_path, "r"); |
80d496be PE |
1347 | if (file == NULL) |
1348 | goto out_failure; | |
1349 | ||
1350 | while (!feof(file)) { | |
9cffa8d5 | 1351 | u64 start, size; |
80d496be PE |
1352 | struct symbol *sym; |
1353 | int line_len, len; | |
1354 | ||
1355 | line_len = getline(&line, &n, file); | |
1356 | if (line_len < 0) | |
1357 | break; | |
1358 | ||
1359 | if (!line) | |
1360 | goto out_failure; | |
1361 | ||
1362 | line[--line_len] = '\0'; /* \n */ | |
1363 | ||
1364 | len = hex2u64(line, &start); | |
1365 | ||
1366 | len++; | |
1367 | if (len + 2 >= line_len) | |
1368 | continue; | |
1369 | ||
1370 | len += hex2u64(line + len, &size); | |
1371 | ||
1372 | len++; | |
1373 | if (len + 2 >= line_len) | |
1374 | continue; | |
1375 | ||
c408fedf | 1376 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
1377 | |
1378 | if (sym == NULL) | |
1379 | goto out_delete_line; | |
1380 | ||
be39db9f ACM |
1381 | symbols__insert(&dso->symbols[map->type], sym); |
1382 | nr_syms++; | |
80d496be PE |
1383 | } |
1384 | ||
1385 | free(line); | |
1386 | fclose(file); | |
1387 | ||
1388 | return nr_syms; | |
1389 | ||
1390 | out_delete_line: | |
1391 | free(line); | |
1392 | out_failure: | |
1393 | return -1; | |
1394 | } | |
1395 | ||
1029f9fe NK |
1396 | static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod, |
1397 | enum dso_binary_type type) | |
1398 | { | |
1399 | switch (type) { | |
1400 | case DSO_BINARY_TYPE__JAVA_JIT: | |
1401 | case DSO_BINARY_TYPE__DEBUGLINK: | |
1402 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
1403 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
1404 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
1405 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: | |
1406 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: | |
1407 | return !kmod && dso->kernel == DSO_TYPE_USER; | |
1408 | ||
1409 | case DSO_BINARY_TYPE__KALLSYMS: | |
1410 | case DSO_BINARY_TYPE__VMLINUX: | |
1411 | case DSO_BINARY_TYPE__KCORE: | |
1412 | return dso->kernel == DSO_TYPE_KERNEL; | |
1413 | ||
1414 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
1415 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
1416 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
1417 | return dso->kernel == DSO_TYPE_GUEST_KERNEL; | |
1418 | ||
1419 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 1420 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
1029f9fe | 1421 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: |
c00c48fc | 1422 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
1029f9fe NK |
1423 | /* |
1424 | * kernel modules know their symtab type - it's set when | |
9f2de315 | 1425 | * creating a module dso in machine__findnew_module_map(). |
1029f9fe NK |
1426 | */ |
1427 | return kmod && dso->symtab_type == type; | |
1428 | ||
1429 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
d2396999 | 1430 | case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO: |
1029f9fe NK |
1431 | return true; |
1432 | ||
1433 | case DSO_BINARY_TYPE__NOT_FOUND: | |
1434 | default: | |
1435 | return false; | |
1436 | } | |
1437 | } | |
1438 | ||
bf2e710b KJ |
1439 | /* Checks for the existence of the perf-<pid>.map file in two different |
1440 | * locations. First, if the process is a separate mount namespace, check in | |
1441 | * that namespace using the pid of the innermost pid namespace. If's not in a | |
1442 | * namespace, or the file can't be found there, try in the mount namespace of | |
1443 | * the tracing process using our view of its pid. | |
1444 | */ | |
1445 | static int dso__find_perf_map(char *filebuf, size_t bufsz, | |
1446 | struct nsinfo **nsip) | |
1447 | { | |
1448 | struct nscookie nsc; | |
1449 | struct nsinfo *nsi; | |
1450 | struct nsinfo *nnsi; | |
1451 | int rc = -1; | |
1452 | ||
1453 | nsi = *nsip; | |
1454 | ||
1455 | if (nsi->need_setns) { | |
1456 | snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nsi->nstgid); | |
1457 | nsinfo__mountns_enter(nsi, &nsc); | |
1458 | rc = access(filebuf, R_OK); | |
1459 | nsinfo__mountns_exit(&nsc); | |
1460 | if (rc == 0) | |
1461 | return rc; | |
1462 | } | |
1463 | ||
1464 | nnsi = nsinfo__copy(nsi); | |
1465 | if (nnsi) { | |
1466 | nsinfo__put(nsi); | |
1467 | ||
1468 | nnsi->need_setns = false; | |
1469 | snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nnsi->tgid); | |
1470 | *nsip = nnsi; | |
1471 | rc = 0; | |
1472 | } | |
1473 | ||
1474 | return rc; | |
1475 | } | |
1476 | ||
be39db9f | 1477 | int dso__load(struct dso *dso, struct map *map) |
a2928c42 | 1478 | { |
c338aee8 | 1479 | char *name; |
a2928c42 | 1480 | int ret = -1; |
44f24cb3 | 1481 | u_int i; |
23346f21 | 1482 | struct machine *machine; |
44f24cb3 | 1483 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1484 | int ss_pos = 0; |
1485 | struct symsrc ss_[2]; | |
1486 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
1029f9fe | 1487 | bool kmod; |
bf2e710b | 1488 | bool perfmap; |
5baecbcd | 1489 | unsigned char build_id[BUILD_ID_SIZE]; |
843ff37b | 1490 | struct nscookie nsc; |
bf2e710b KJ |
1491 | char newmapname[PATH_MAX]; |
1492 | const char *map_path = dso->long_name; | |
1493 | ||
1494 | perfmap = strncmp(dso->name, "/tmp/perf-", 10) == 0; | |
1495 | if (perfmap) { | |
1496 | if (dso->nsinfo && (dso__find_perf_map(newmapname, | |
1497 | sizeof(newmapname), &dso->nsinfo) == 0)) { | |
1498 | map_path = newmapname; | |
1499 | } | |
1500 | } | |
a2928c42 | 1501 | |
843ff37b | 1502 | nsinfo__mountns_enter(dso->nsinfo, &nsc); |
4a936edc NK |
1503 | pthread_mutex_lock(&dso->lock); |
1504 | ||
1505 | /* check again under the dso->lock */ | |
1506 | if (dso__loaded(dso, map->type)) { | |
1507 | ret = 1; | |
1508 | goto out; | |
1509 | } | |
66bd8424 | 1510 | |
4a936edc NK |
1511 | if (dso->kernel) { |
1512 | if (dso->kernel == DSO_TYPE_KERNEL) | |
be39db9f | 1513 | ret = dso__load_kernel_sym(dso, map); |
4a936edc | 1514 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
be39db9f | 1515 | ret = dso__load_guest_kernel_sym(dso, map); |
4a936edc NK |
1516 | |
1517 | goto out; | |
1518 | } | |
a1645ce1 | 1519 | |
23346f21 ACM |
1520 | if (map->groups && map->groups->machine) |
1521 | machine = map->groups->machine; | |
a1645ce1 | 1522 | else |
23346f21 | 1523 | machine = NULL; |
c338aee8 | 1524 | |
aeafcbaf | 1525 | dso->adjust_symbols = 0; |
f5812a7a | 1526 | |
bf2e710b | 1527 | if (perfmap) { |
981c1252 PE |
1528 | struct stat st; |
1529 | ||
bf2e710b | 1530 | if (lstat(map_path, &st) < 0) |
4a936edc | 1531 | goto out; |
981c1252 | 1532 | |
2059fc7a | 1533 | if (!symbol_conf.force && st.st_uid && (st.st_uid != geteuid())) { |
981c1252 | 1534 | pr_warning("File %s not owned by current user or root, " |
bf2e710b | 1535 | "ignoring it (use -f to override).\n", map_path); |
4a936edc | 1536 | goto out; |
981c1252 PE |
1537 | } |
1538 | ||
bf2e710b | 1539 | ret = dso__load_perf_map(map_path, dso, map); |
44f24cb3 JO |
1540 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1541 | DSO_BINARY_TYPE__NOT_FOUND; | |
4a936edc | 1542 | goto out; |
94cb9e38 ACM |
1543 | } |
1544 | ||
44f24cb3 JO |
1545 | if (machine) |
1546 | root_dir = machine->root_dir; | |
1547 | ||
164c800e DA |
1548 | name = malloc(PATH_MAX); |
1549 | if (!name) | |
4a936edc | 1550 | goto out; |
164c800e | 1551 | |
1029f9fe | 1552 | kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || |
c00c48fc NK |
1553 | dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || |
1554 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE || | |
1555 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
1029f9fe | 1556 | |
5baecbcd DK |
1557 | |
1558 | /* | |
1559 | * Read the build id if possible. This is required for | |
1560 | * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work | |
1561 | */ | |
ed6c166c | 1562 | if (!dso->has_build_id && |
9b200653 VK |
1563 | is_regular_file(dso->long_name)) { |
1564 | __symbol__join_symfs(name, PATH_MAX, dso->long_name); | |
1565 | if (filename__read_build_id(name, build_id, BUILD_ID_SIZE) > 0) | |
5baecbcd | 1566 | dso__set_build_id(dso, build_id); |
9b200653 | 1567 | } |
5baecbcd | 1568 | |
1029f9fe NK |
1569 | /* |
1570 | * Iterate over candidate debug images. | |
3aafe5ae CS |
1571 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1572 | * and/or opd section) for processing. | |
6da80ce8 | 1573 | */ |
44f24cb3 | 1574 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1575 | struct symsrc *ss = &ss_[ss_pos]; |
1576 | bool next_slot = false; | |
f045b8c4 | 1577 | bool is_reg; |
d2396999 | 1578 | bool nsexit; |
f045b8c4 | 1579 | int sirc; |
6da80ce8 | 1580 | |
005f9294 | 1581 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1582 | |
d2396999 KJ |
1583 | nsexit = (symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE || |
1584 | symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO); | |
1585 | ||
1029f9fe NK |
1586 | if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type)) |
1587 | continue; | |
1588 | ||
ee4e9625 ACM |
1589 | if (dso__read_binary_type_filename(dso, symtab_type, |
1590 | root_dir, name, PATH_MAX)) | |
44f24cb3 | 1591 | continue; |
6da80ce8 | 1592 | |
d2396999 | 1593 | if (nsexit) |
f045b8c4 KJ |
1594 | nsinfo__mountns_exit(&nsc); |
1595 | ||
1596 | is_reg = is_regular_file(name); | |
1597 | sirc = symsrc__init(ss, dso, name, symtab_type); | |
40356721 | 1598 | |
d2396999 | 1599 | if (nsexit) |
f045b8c4 KJ |
1600 | nsinfo__mountns_enter(dso->nsinfo, &nsc); |
1601 | ||
1602 | if (!is_reg || sirc < 0) { | |
1603 | if (sirc >= 0) | |
1604 | symsrc__destroy(ss); | |
6da80ce8 | 1605 | continue; |
f045b8c4 | 1606 | } |
a2928c42 | 1607 | |
3aafe5ae CS |
1608 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1609 | syms_ss = ss; | |
1610 | next_slot = true; | |
0058aef6 AH |
1611 | if (!dso->symsrc_filename) |
1612 | dso->symsrc_filename = strdup(name); | |
d26cd12b CS |
1613 | } |
1614 | ||
3aafe5ae CS |
1615 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1616 | runtime_ss = ss; | |
1617 | next_slot = true; | |
a44f605b | 1618 | } |
a2928c42 | 1619 | |
3aafe5ae CS |
1620 | if (next_slot) { |
1621 | ss_pos++; | |
33ff581e | 1622 | |
3aafe5ae CS |
1623 | if (syms_ss && runtime_ss) |
1624 | break; | |
98e9f03b NK |
1625 | } else { |
1626 | symsrc__destroy(ss); | |
6da80ce8 | 1627 | } |
3aafe5ae | 1628 | |
a25e46c4 | 1629 | } |
6da80ce8 | 1630 | |
3aafe5ae CS |
1631 | if (!runtime_ss && !syms_ss) |
1632 | goto out_free; | |
1633 | ||
1634 | if (runtime_ss && !syms_ss) { | |
1635 | syms_ss = runtime_ss; | |
1636 | } | |
1637 | ||
1638 | /* We'll have to hope for the best */ | |
1639 | if (!runtime_ss && syms_ss) | |
1640 | runtime_ss = syms_ss; | |
1641 | ||
1029f9fe | 1642 | if (syms_ss) |
be39db9f | 1643 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, kmod); |
1029f9fe | 1644 | else |
3aafe5ae CS |
1645 | ret = -1; |
1646 | ||
f47b58b7 | 1647 | if (ret > 0) { |
3aafe5ae CS |
1648 | int nr_plt; |
1649 | ||
be39db9f | 1650 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map); |
3aafe5ae CS |
1651 | if (nr_plt > 0) |
1652 | ret += nr_plt; | |
60e4b10c ACM |
1653 | } |
1654 | ||
3aafe5ae CS |
1655 | for (; ss_pos > 0; ss_pos--) |
1656 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1657 | out_free: | |
a2928c42 | 1658 | free(name); |
aeafcbaf | 1659 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
4a936edc NK |
1660 | ret = 0; |
1661 | out: | |
1662 | dso__set_loaded(dso, map->type); | |
1663 | pthread_mutex_unlock(&dso->lock); | |
843ff37b | 1664 | nsinfo__mountns_exit(&nsc); |
4a936edc | 1665 | |
a2928c42 ACM |
1666 | return ret; |
1667 | } | |
1668 | ||
aeafcbaf | 1669 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1670 | enum map_type type, const char *name) |
439d473b | 1671 | { |
1eee78ae | 1672 | struct maps *maps = &mg->maps[type]; |
4bb7123d | 1673 | struct map *map; |
439d473b | 1674 | |
6a2ffcdd ACM |
1675 | pthread_rwlock_rdlock(&maps->lock); |
1676 | ||
4bb7123d | 1677 | for (map = maps__first(maps); map; map = map__next(map)) { |
b7cece76 | 1678 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
6a2ffcdd | 1679 | goto out_unlock; |
439d473b ACM |
1680 | } |
1681 | ||
6a2ffcdd ACM |
1682 | map = NULL; |
1683 | ||
1684 | out_unlock: | |
1685 | pthread_rwlock_unlock(&maps->lock); | |
1686 | return map; | |
439d473b ACM |
1687 | } |
1688 | ||
aeafcbaf | 1689 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
be39db9f | 1690 | const char *vmlinux, bool vmlinux_allocated) |
a2928c42 | 1691 | { |
b68e2f91 CS |
1692 | int err = -1; |
1693 | struct symsrc ss; | |
ec5761ea | 1694 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1695 | enum dso_binary_type symtab_type; |
a2928c42 | 1696 | |
5698d2c9 NK |
1697 | if (vmlinux[0] == '/') |
1698 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1699 | else | |
972f393b | 1700 | symbol__join_symfs(symfs_vmlinux, vmlinux); |
a2928c42 | 1701 | |
21ea4539 | 1702 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1703 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1704 | else |
005f9294 | 1705 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1706 | |
005f9294 | 1707 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1708 | return -1; |
1709 | ||
be39db9f | 1710 | err = dso__load_sym(dso, map, &ss, &ss, 0); |
b68e2f91 | 1711 | symsrc__destroy(&ss); |
a2928c42 | 1712 | |
515850e4 | 1713 | if (err > 0) { |
39b12f78 | 1714 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
5f70619d | 1715 | dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
39b12f78 | 1716 | else |
5f70619d | 1717 | dso->binary_type = DSO_BINARY_TYPE__VMLINUX; |
bf4414ae | 1718 | dso__set_long_name(dso, vmlinux, vmlinux_allocated); |
515850e4 | 1719 | dso__set_loaded(dso, map->type); |
ec5761ea | 1720 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1721 | } |
3846df2e | 1722 | |
a2928c42 ACM |
1723 | return err; |
1724 | } | |
1725 | ||
be39db9f | 1726 | int dso__load_vmlinux_path(struct dso *dso, struct map *map) |
a19afe46 ACM |
1727 | { |
1728 | int i, err = 0; | |
00dc8657 | 1729 | char *filename = NULL; |
a19afe46 | 1730 | |
dc38218e ACM |
1731 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", |
1732 | vmlinux_path__nr_entries + 1); | |
1733 | ||
1734 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
be39db9f | 1735 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], false); |
dc38218e ACM |
1736 | if (err > 0) |
1737 | goto out; | |
1738 | } | |
1739 | ||
00dc8657 | 1740 | if (!symbol_conf.ignore_vmlinux_buildid) |
d2396999 | 1741 | filename = dso__build_id_filename(dso, NULL, 0, false); |
5ad90e4e | 1742 | if (filename != NULL) { |
be39db9f | 1743 | err = dso__load_vmlinux(dso, map, filename, true); |
5230fb7d | 1744 | if (err > 0) |
5ad90e4e | 1745 | goto out; |
5ad90e4e ACM |
1746 | free(filename); |
1747 | } | |
5ad90e4e | 1748 | out: |
a19afe46 ACM |
1749 | return err; |
1750 | } | |
1751 | ||
c48903b8 MH |
1752 | static bool visible_dir_filter(const char *name, struct dirent *d) |
1753 | { | |
1754 | if (d->d_type != DT_DIR) | |
1755 | return false; | |
1756 | return lsdir_no_dot_filter(name, d); | |
1757 | } | |
1758 | ||
0544d422 AH |
1759 | static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz) |
1760 | { | |
1761 | char kallsyms_filename[PATH_MAX]; | |
0544d422 | 1762 | int ret = -1; |
c48903b8 MH |
1763 | struct strlist *dirs; |
1764 | struct str_node *nd; | |
0544d422 | 1765 | |
c48903b8 MH |
1766 | dirs = lsdir(dir, visible_dir_filter); |
1767 | if (!dirs) | |
0544d422 AH |
1768 | return -1; |
1769 | ||
602a1f4d | 1770 | strlist__for_each_entry(nd, dirs) { |
0544d422 | 1771 | scnprintf(kallsyms_filename, sizeof(kallsyms_filename), |
c48903b8 | 1772 | "%s/%s/kallsyms", dir, nd->s); |
a00d28cb | 1773 | if (!validate_kcore_addresses(kallsyms_filename, map)) { |
0544d422 AH |
1774 | strlcpy(dir, kallsyms_filename, dir_sz); |
1775 | ret = 0; | |
1776 | break; | |
1777 | } | |
1778 | } | |
1779 | ||
c48903b8 | 1780 | strlist__delete(dirs); |
0544d422 AH |
1781 | |
1782 | return ret; | |
1783 | } | |
1784 | ||
11870d71 MH |
1785 | /* |
1786 | * Use open(O_RDONLY) to check readability directly instead of access(R_OK) | |
1787 | * since access(R_OK) only checks with real UID/GID but open() use effective | |
1788 | * UID/GID and actual capabilities (e.g. /proc/kcore requires CAP_SYS_RAWIO). | |
1789 | */ | |
1790 | static bool filename__readable(const char *file) | |
1791 | { | |
1792 | int fd = open(file, O_RDONLY); | |
1793 | if (fd < 0) | |
1794 | return false; | |
1795 | close(fd); | |
1796 | return true; | |
1797 | } | |
1798 | ||
0544d422 AH |
1799 | static char *dso__find_kallsyms(struct dso *dso, struct map *map) |
1800 | { | |
1801 | u8 host_build_id[BUILD_ID_SIZE]; | |
b5d8bbe8 | 1802 | char sbuild_id[SBUILD_ID_SIZE]; |
0544d422 AH |
1803 | bool is_host = false; |
1804 | char path[PATH_MAX]; | |
1805 | ||
1806 | if (!dso->has_build_id) { | |
1807 | /* | |
1808 | * Last resort, if we don't have a build-id and couldn't find | |
1809 | * any vmlinux file, try the running kernel kallsyms table. | |
1810 | */ | |
1811 | goto proc_kallsyms; | |
1812 | } | |
1813 | ||
1814 | if (sysfs__read_build_id("/sys/kernel/notes", host_build_id, | |
1815 | sizeof(host_build_id)) == 0) | |
1816 | is_host = dso__build_id_equal(dso, host_build_id); | |
1817 | ||
4e4b6c06 | 1818 | /* Try a fast path for /proc/kallsyms if possible */ |
0544d422 | 1819 | if (is_host) { |
0544d422 | 1820 | /* |
11870d71 MH |
1821 | * Do not check the build-id cache, unless we know we cannot use |
1822 | * /proc/kcore or module maps don't match to /proc/kallsyms. | |
1823 | * To check readability of /proc/kcore, do not use access(R_OK) | |
1824 | * since /proc/kcore requires CAP_SYS_RAWIO to read and access | |
1825 | * can't check it. | |
0544d422 | 1826 | */ |
11870d71 MH |
1827 | if (filename__readable("/proc/kcore") && |
1828 | !validate_kcore_addresses("/proc/kallsyms", map)) | |
1829 | goto proc_kallsyms; | |
0544d422 AH |
1830 | } |
1831 | ||
4e4b6c06 MH |
1832 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); |
1833 | ||
449867e3 | 1834 | /* Find kallsyms in build-id cache with kcore */ |
4e4b6c06 MH |
1835 | scnprintf(path, sizeof(path), "%s/%s/%s", |
1836 | buildid_dir, DSO__NAME_KCORE, sbuild_id); | |
1837 | ||
449867e3 AH |
1838 | if (!find_matching_kcore(map, path, sizeof(path))) |
1839 | return strdup(path); | |
1840 | ||
4e4b6c06 MH |
1841 | /* Use current /proc/kallsyms if possible */ |
1842 | if (is_host) { | |
1843 | proc_kallsyms: | |
1844 | return strdup("/proc/kallsyms"); | |
1845 | } | |
1846 | ||
1847 | /* Finally, find a cache of kallsyms */ | |
01412261 | 1848 | if (!build_id_cache__kallsyms_path(sbuild_id, path, sizeof(path))) { |
0544d422 AH |
1849 | pr_err("No kallsyms or vmlinux with build-id %s was found\n", |
1850 | sbuild_id); | |
1851 | return NULL; | |
1852 | } | |
1853 | ||
1854 | return strdup(path); | |
0544d422 AH |
1855 | } |
1856 | ||
be39db9f | 1857 | static int dso__load_kernel_sym(struct dso *dso, struct map *map) |
a827c875 | 1858 | { |
cc612d81 | 1859 | int err; |
9e201442 ACM |
1860 | const char *kallsyms_filename = NULL; |
1861 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1862 | /* |
b226a5a7 DA |
1863 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1864 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1865 | * |
1866 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1867 | * build-id, or if the user specifies the wrong path to the right | |
1868 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1869 | * x86_86 one, on the machine where analysis is being performed, say), | |
1870 | * or worse, /proc/kallsyms. | |
1871 | * | |
1872 | * If the specified file _has_ a build-id and there is a build-id | |
1873 | * section in the perf.data file, we will still do the expected | |
1874 | * validation in dso__load_vmlinux and will bail out if they don't | |
1875 | * match. | |
1876 | */ | |
b226a5a7 DA |
1877 | if (symbol_conf.kallsyms_name != NULL) { |
1878 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1879 | goto do_kallsyms; | |
1880 | } | |
1881 | ||
fc2be696 | 1882 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
be39db9f | 1883 | return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, false); |
dc8d6ab2 | 1884 | } |
cc612d81 | 1885 | |
fc2be696 | 1886 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
be39db9f | 1887 | err = dso__load_vmlinux_path(dso, map); |
a19afe46 | 1888 | if (err > 0) |
39b12f78 | 1889 | return err; |
cc612d81 ACM |
1890 | } |
1891 | ||
ec5761ea DA |
1892 | /* do not try local files if a symfs was given */ |
1893 | if (symbol_conf.symfs[0] != 0) | |
1894 | return -1; | |
1895 | ||
0544d422 AH |
1896 | kallsyms_allocated_filename = dso__find_kallsyms(dso, map); |
1897 | if (!kallsyms_allocated_filename) | |
1898 | return -1; | |
19fc2ded | 1899 | |
0544d422 | 1900 | kallsyms_filename = kallsyms_allocated_filename; |
439d473b | 1901 | |
cc612d81 | 1902 | do_kallsyms: |
be39db9f | 1903 | err = dso__load_kallsyms(dso, kallsyms_filename, map); |
3846df2e ACM |
1904 | if (err > 0) |
1905 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1906 | free(kallsyms_allocated_filename); |
439d473b | 1907 | |
8e0cf965 | 1908 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1909 | dso->binary_type = DSO_BINARY_TYPE__KALLSYMS; |
0a77582f | 1910 | dso__set_long_name(dso, DSO__NAME_KALLSYMS, false); |
6a4694a4 ACM |
1911 | map__fixup_start(map); |
1912 | map__fixup_end(map); | |
439d473b | 1913 | } |
94cb9e38 | 1914 | |
a827c875 ACM |
1915 | return err; |
1916 | } | |
1917 | ||
be39db9f | 1918 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map) |
a1645ce1 ZY |
1919 | { |
1920 | int err; | |
1921 | const char *kallsyms_filename = NULL; | |
23346f21 | 1922 | struct machine *machine; |
a1645ce1 ZY |
1923 | char path[PATH_MAX]; |
1924 | ||
1925 | if (!map->groups) { | |
1926 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1927 | return -1; | |
1928 | } | |
23346f21 | 1929 | machine = map->groups->machine; |
a1645ce1 | 1930 | |
23346f21 | 1931 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1932 | /* |
1933 | * if the user specified a vmlinux filename, use it and only | |
1934 | * it, reporting errors to the user if it cannot be used. | |
1935 | * Or use file guest_kallsyms inputted by user on commandline | |
1936 | */ | |
1937 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1938 | err = dso__load_vmlinux(dso, map, |
5230fb7d | 1939 | symbol_conf.default_guest_vmlinux_name, |
be39db9f | 1940 | false); |
39b12f78 | 1941 | return err; |
a1645ce1 ZY |
1942 | } |
1943 | ||
1944 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1945 | if (!kallsyms_filename) | |
1946 | return -1; | |
1947 | } else { | |
23346f21 | 1948 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1949 | kallsyms_filename = path; |
1950 | } | |
1951 | ||
be39db9f | 1952 | err = dso__load_kallsyms(dso, kallsyms_filename, map); |
8e0cf965 | 1953 | if (err > 0) |
39b12f78 | 1954 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 1955 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1956 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
39b12f78 | 1957 | machine__mmap_name(machine, path, sizeof(path)); |
7e155d4d | 1958 | dso__set_long_name(dso, strdup(path), true); |
a1645ce1 ZY |
1959 | map__fixup_start(map); |
1960 | map__fixup_end(map); | |
1961 | } | |
1962 | ||
1963 | return err; | |
1964 | } | |
cd84c2ac | 1965 | |
cc612d81 ACM |
1966 | static void vmlinux_path__exit(void) |
1967 | { | |
04662523 ACM |
1968 | while (--vmlinux_path__nr_entries >= 0) |
1969 | zfree(&vmlinux_path[vmlinux_path__nr_entries]); | |
c4f03547 | 1970 | vmlinux_path__nr_entries = 0; |
cc612d81 | 1971 | |
04662523 | 1972 | zfree(&vmlinux_path); |
cc612d81 ACM |
1973 | } |
1974 | ||
aac48647 ET |
1975 | static const char * const vmlinux_paths[] = { |
1976 | "vmlinux", | |
1977 | "/boot/vmlinux" | |
1978 | }; | |
1979 | ||
1980 | static const char * const vmlinux_paths_upd[] = { | |
1981 | "/boot/vmlinux-%s", | |
1982 | "/usr/lib/debug/boot/vmlinux-%s", | |
1983 | "/lib/modules/%s/build/vmlinux", | |
f55ae954 ET |
1984 | "/usr/lib/debug/lib/modules/%s/vmlinux", |
1985 | "/usr/lib/debug/boot/vmlinux-%s.debug" | |
aac48647 ET |
1986 | }; |
1987 | ||
1988 | static int vmlinux_path__add(const char *new_entry) | |
1989 | { | |
1990 | vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry); | |
1991 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1992 | return -1; | |
1993 | ++vmlinux_path__nr_entries; | |
1994 | ||
1995 | return 0; | |
1996 | } | |
1997 | ||
ce80d3be | 1998 | static int vmlinux_path__init(struct perf_env *env) |
cc612d81 ACM |
1999 | { |
2000 | struct utsname uts; | |
2001 | char bf[PATH_MAX]; | |
0a7e6d1b | 2002 | char *kernel_version; |
aac48647 | 2003 | unsigned int i; |
cc612d81 | 2004 | |
aac48647 ET |
2005 | vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) + |
2006 | ARRAY_SIZE(vmlinux_paths_upd))); | |
cc612d81 ACM |
2007 | if (vmlinux_path == NULL) |
2008 | return -1; | |
2009 | ||
aac48647 ET |
2010 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++) |
2011 | if (vmlinux_path__add(vmlinux_paths[i]) < 0) | |
2012 | goto out_fail; | |
ec5761ea | 2013 | |
0a7e6d1b | 2014 | /* only try kernel version if no symfs was given */ |
ec5761ea DA |
2015 | if (symbol_conf.symfs[0] != 0) |
2016 | return 0; | |
2017 | ||
0a7e6d1b NK |
2018 | if (env) { |
2019 | kernel_version = env->os_release; | |
2020 | } else { | |
2021 | if (uname(&uts) < 0) | |
2022 | goto out_fail; | |
2023 | ||
2024 | kernel_version = uts.release; | |
2025 | } | |
ec5761ea | 2026 | |
aac48647 ET |
2027 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) { |
2028 | snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version); | |
2029 | if (vmlinux_path__add(bf) < 0) | |
2030 | goto out_fail; | |
2031 | } | |
cc612d81 ACM |
2032 | |
2033 | return 0; | |
2034 | ||
2035 | out_fail: | |
2036 | vmlinux_path__exit(); | |
2037 | return -1; | |
2038 | } | |
2039 | ||
3bfe5f81 | 2040 | int setup_list(struct strlist **list, const char *list_str, |
655000e7 ACM |
2041 | const char *list_name) |
2042 | { | |
2043 | if (list_str == NULL) | |
2044 | return 0; | |
2045 | ||
4a77e218 | 2046 | *list = strlist__new(list_str, NULL); |
655000e7 ACM |
2047 | if (!*list) { |
2048 | pr_err("problems parsing %s list\n", list_name); | |
2049 | return -1; | |
2050 | } | |
0bc2f2f7 ACM |
2051 | |
2052 | symbol_conf.has_filter = true; | |
655000e7 ACM |
2053 | return 0; |
2054 | } | |
2055 | ||
e03eaa40 DA |
2056 | int setup_intlist(struct intlist **list, const char *list_str, |
2057 | const char *list_name) | |
2058 | { | |
2059 | if (list_str == NULL) | |
2060 | return 0; | |
2061 | ||
2062 | *list = intlist__new(list_str); | |
2063 | if (!*list) { | |
2064 | pr_err("problems parsing %s list\n", list_name); | |
2065 | return -1; | |
2066 | } | |
2067 | return 0; | |
2068 | } | |
2069 | ||
ec80fde7 ACM |
2070 | static bool symbol__read_kptr_restrict(void) |
2071 | { | |
2072 | bool value = false; | |
38272dc4 | 2073 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); |
ec80fde7 | 2074 | |
38272dc4 WN |
2075 | if (fp != NULL) { |
2076 | char line[8]; | |
ec80fde7 | 2077 | |
38272dc4 | 2078 | if (fgets(line, sizeof(line), fp) != NULL) |
3dbe46c5 | 2079 | value = ((geteuid() != 0) || (getuid() != 0)) ? |
38272dc4 WN |
2080 | (atoi(line) != 0) : |
2081 | (atoi(line) == 2); | |
ec80fde7 | 2082 | |
38272dc4 | 2083 | fclose(fp); |
ec80fde7 ACM |
2084 | } |
2085 | ||
2086 | return value; | |
2087 | } | |
2088 | ||
b01141f4 ACM |
2089 | int symbol__annotation_init(void) |
2090 | { | |
2091 | if (symbol_conf.initialized) { | |
2092 | pr_err("Annotation needs to be init before symbol__init()\n"); | |
2093 | return -1; | |
2094 | } | |
2095 | ||
2096 | if (symbol_conf.init_annotation) { | |
2097 | pr_warning("Annotation being initialized multiple times\n"); | |
2098 | return 0; | |
2099 | } | |
2100 | ||
2101 | symbol_conf.priv_size += sizeof(struct annotation); | |
2102 | symbol_conf.init_annotation = true; | |
2103 | return 0; | |
2104 | } | |
2105 | ||
ce80d3be | 2106 | int symbol__init(struct perf_env *env) |
2446042c | 2107 | { |
ec5761ea DA |
2108 | const char *symfs; |
2109 | ||
85e00b55 JZ |
2110 | if (symbol_conf.initialized) |
2111 | return 0; | |
2112 | ||
9ac3e487 | 2113 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 2114 | |
166ccc9c NK |
2115 | symbol__elf_init(); |
2116 | ||
75be6cf4 ACM |
2117 | if (symbol_conf.sort_by_name) |
2118 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2119 | sizeof(struct symbol)); | |
b32d133a | 2120 | |
0a7e6d1b | 2121 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0) |
2446042c ACM |
2122 | return -1; |
2123 | ||
c410a338 ACM |
2124 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2125 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2126 | return -1; | |
2127 | } | |
2128 | ||
655000e7 ACM |
2129 | if (setup_list(&symbol_conf.dso_list, |
2130 | symbol_conf.dso_list_str, "dso") < 0) | |
2131 | return -1; | |
2132 | ||
2133 | if (setup_list(&symbol_conf.comm_list, | |
2134 | symbol_conf.comm_list_str, "comm") < 0) | |
2135 | goto out_free_dso_list; | |
2136 | ||
e03eaa40 DA |
2137 | if (setup_intlist(&symbol_conf.pid_list, |
2138 | symbol_conf.pid_list_str, "pid") < 0) | |
2139 | goto out_free_comm_list; | |
2140 | ||
2141 | if (setup_intlist(&symbol_conf.tid_list, | |
2142 | symbol_conf.tid_list_str, "tid") < 0) | |
2143 | goto out_free_pid_list; | |
2144 | ||
655000e7 ACM |
2145 | if (setup_list(&symbol_conf.sym_list, |
2146 | symbol_conf.sym_list_str, "symbol") < 0) | |
e03eaa40 | 2147 | goto out_free_tid_list; |
655000e7 | 2148 | |
64eff7d9 DA |
2149 | if (setup_list(&symbol_conf.bt_stop_list, |
2150 | symbol_conf.bt_stop_list_str, "symbol") < 0) | |
2151 | goto out_free_sym_list; | |
2152 | ||
ec5761ea DA |
2153 | /* |
2154 | * A path to symbols of "/" is identical to "" | |
2155 | * reset here for simplicity. | |
2156 | */ | |
2157 | symfs = realpath(symbol_conf.symfs, NULL); | |
2158 | if (symfs == NULL) | |
2159 | symfs = symbol_conf.symfs; | |
2160 | if (strcmp(symfs, "/") == 0) | |
2161 | symbol_conf.symfs = ""; | |
2162 | if (symfs != symbol_conf.symfs) | |
2163 | free((void *)symfs); | |
2164 | ||
ec80fde7 ACM |
2165 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2166 | ||
85e00b55 | 2167 | symbol_conf.initialized = true; |
4aa65636 | 2168 | return 0; |
655000e7 | 2169 | |
64eff7d9 DA |
2170 | out_free_sym_list: |
2171 | strlist__delete(symbol_conf.sym_list); | |
e03eaa40 DA |
2172 | out_free_tid_list: |
2173 | intlist__delete(symbol_conf.tid_list); | |
2174 | out_free_pid_list: | |
2175 | intlist__delete(symbol_conf.pid_list); | |
655000e7 ACM |
2176 | out_free_comm_list: |
2177 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
2178 | out_free_dso_list: |
2179 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 2180 | return -1; |
4aa65636 ACM |
2181 | } |
2182 | ||
d65a458b ACM |
2183 | void symbol__exit(void) |
2184 | { | |
85e00b55 JZ |
2185 | if (!symbol_conf.initialized) |
2186 | return; | |
64eff7d9 | 2187 | strlist__delete(symbol_conf.bt_stop_list); |
d65a458b ACM |
2188 | strlist__delete(symbol_conf.sym_list); |
2189 | strlist__delete(symbol_conf.dso_list); | |
2190 | strlist__delete(symbol_conf.comm_list); | |
e03eaa40 DA |
2191 | intlist__delete(symbol_conf.tid_list); |
2192 | intlist__delete(symbol_conf.pid_list); | |
d65a458b ACM |
2193 | vmlinux_path__exit(); |
2194 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
64eff7d9 | 2195 | symbol_conf.bt_stop_list = NULL; |
85e00b55 | 2196 | symbol_conf.initialized = false; |
d65a458b | 2197 | } |
a7066709 HK |
2198 | |
2199 | int symbol__config_symfs(const struct option *opt __maybe_unused, | |
2200 | const char *dir, int unset __maybe_unused) | |
2201 | { | |
2202 | char *bf = NULL; | |
2203 | int ret; | |
2204 | ||
2205 | symbol_conf.symfs = strdup(dir); | |
2206 | if (symbol_conf.symfs == NULL) | |
2207 | return -ENOMEM; | |
2208 | ||
2209 | /* skip the locally configured cache if a symfs is given, and | |
2210 | * config buildid dir to symfs/.debug | |
2211 | */ | |
2212 | ret = asprintf(&bf, "%s/%s", dir, ".debug"); | |
2213 | if (ret < 0) | |
2214 | return -ENOMEM; | |
2215 | ||
2216 | set_buildid_dir(bf); | |
2217 | ||
2218 | free(bf); | |
2219 | return 0; | |
2220 | } |