Commit | Line | Data |
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5aab621b ACM |
1 | #include <dirent.h> |
2 | #include <errno.h> | |
5aab621b ACM |
3 | #include <stdlib.h> |
4 | #include <stdio.h> | |
5 | #include <string.h> | |
6 | #include <sys/types.h> | |
7 | #include <sys/stat.h> | |
8 | #include <sys/param.h> | |
9 | #include <fcntl.h> | |
10 | #include <unistd.h> | |
9486aa38 | 11 | #include <inttypes.h> |
b36f19d5 | 12 | #include "build-id.h" |
e334c726 | 13 | #include "util.h" |
8a6c5b26 | 14 | #include "debug.h" |
69d2591a | 15 | #include "machine.h" |
a2928c42 | 16 | #include "symbol.h" |
5aab621b | 17 | #include "strlist.h" |
e03eaa40 | 18 | #include "intlist.h" |
0a7e6d1b | 19 | #include "header.h" |
a2928c42 | 20 | |
a2928c42 | 21 | #include <elf.h> |
f1617b40 | 22 | #include <limits.h> |
c506c96b | 23 | #include <symbol/kallsyms.h> |
439d473b | 24 | #include <sys/utsname.h> |
2cdbc46d | 25 | |
aeafcbaf | 26 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 27 | symbol_filter_t filter); |
aeafcbaf | 28 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
a1645ce1 | 29 | symbol_filter_t filter); |
3f067dca ACM |
30 | int vmlinux_path__nr_entries; |
31 | char **vmlinux_path; | |
439d473b | 32 | |
75be6cf4 | 33 | struct symbol_conf symbol_conf = { |
e511db5e NK |
34 | .use_modules = true, |
35 | .try_vmlinux_path = true, | |
36 | .annotate_src = true, | |
37 | .demangle = true, | |
763122ad | 38 | .demangle_kernel = false, |
e511db5e | 39 | .cumulate_callchain = true, |
c8302367 | 40 | .show_hist_headers = true, |
e511db5e | 41 | .symfs = "", |
1e9abf8b | 42 | .event_group = true, |
b32d133a ACM |
43 | }; |
44 | ||
44f24cb3 JO |
45 | static enum dso_binary_type binary_type_symtab[] = { |
46 | DSO_BINARY_TYPE__KALLSYMS, | |
47 | DSO_BINARY_TYPE__GUEST_KALLSYMS, | |
48 | DSO_BINARY_TYPE__JAVA_JIT, | |
49 | DSO_BINARY_TYPE__DEBUGLINK, | |
50 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
51 | DSO_BINARY_TYPE__FEDORA_DEBUGINFO, | |
52 | DSO_BINARY_TYPE__UBUNTU_DEBUGINFO, | |
53 | DSO_BINARY_TYPE__BUILDID_DEBUGINFO, | |
54 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
55 | DSO_BINARY_TYPE__GUEST_KMODULE, | |
c00c48fc | 56 | DSO_BINARY_TYPE__GUEST_KMODULE_COMP, |
44f24cb3 | 57 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE, |
c00c48fc | 58 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP, |
9cd00941 | 59 | DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO, |
44f24cb3 JO |
60 | DSO_BINARY_TYPE__NOT_FOUND, |
61 | }; | |
62 | ||
028df767 | 63 | #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab) |
44f24cb3 | 64 | |
36a3e646 | 65 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee | 66 | { |
31877908 AB |
67 | symbol_type = toupper(symbol_type); |
68 | ||
6893d4ee ACM |
69 | switch (map_type) { |
70 | case MAP__FUNCTION: | |
71 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 | 72 | case MAP__VARIABLE: |
31877908 | 73 | return symbol_type == 'D'; |
6893d4ee ACM |
74 | default: |
75 | return false; | |
76 | } | |
77 | } | |
78 | ||
694bf407 AB |
79 | static int prefix_underscores_count(const char *str) |
80 | { | |
81 | const char *tail = str; | |
82 | ||
83 | while (*tail == '_') | |
84 | tail++; | |
85 | ||
86 | return tail - str; | |
87 | } | |
88 | ||
fb6d5942 NR |
89 | int __weak arch__choose_best_symbol(struct symbol *syma, |
90 | struct symbol *symb __maybe_unused) | |
91 | { | |
92 | /* Avoid "SyS" kernel syscall aliases */ | |
93 | if (strlen(syma->name) >= 3 && !strncmp(syma->name, "SyS", 3)) | |
94 | return SYMBOL_B; | |
95 | if (strlen(syma->name) >= 10 && !strncmp(syma->name, "compat_SyS", 10)) | |
96 | return SYMBOL_B; | |
97 | ||
98 | return SYMBOL_A; | |
99 | } | |
694bf407 AB |
100 | |
101 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
102 | { | |
103 | s64 a; | |
104 | s64 b; | |
3445432b | 105 | size_t na, nb; |
694bf407 AB |
106 | |
107 | /* Prefer a symbol with non zero length */ | |
108 | a = syma->end - syma->start; | |
109 | b = symb->end - symb->start; | |
110 | if ((b == 0) && (a > 0)) | |
111 | return SYMBOL_A; | |
112 | else if ((a == 0) && (b > 0)) | |
113 | return SYMBOL_B; | |
114 | ||
115 | /* Prefer a non weak symbol over a weak one */ | |
116 | a = syma->binding == STB_WEAK; | |
117 | b = symb->binding == STB_WEAK; | |
118 | if (b && !a) | |
119 | return SYMBOL_A; | |
120 | if (a && !b) | |
121 | return SYMBOL_B; | |
122 | ||
123 | /* Prefer a global symbol over a non global one */ | |
124 | a = syma->binding == STB_GLOBAL; | |
125 | b = symb->binding == STB_GLOBAL; | |
126 | if (a && !b) | |
127 | return SYMBOL_A; | |
128 | if (b && !a) | |
129 | return SYMBOL_B; | |
130 | ||
131 | /* Prefer a symbol with less underscores */ | |
132 | a = prefix_underscores_count(syma->name); | |
133 | b = prefix_underscores_count(symb->name); | |
134 | if (b > a) | |
135 | return SYMBOL_A; | |
136 | else if (a > b) | |
137 | return SYMBOL_B; | |
138 | ||
3445432b AH |
139 | /* Choose the symbol with the longest name */ |
140 | na = strlen(syma->name); | |
141 | nb = strlen(symb->name); | |
142 | if (na > nb) | |
694bf407 | 143 | return SYMBOL_A; |
3445432b | 144 | else if (na < nb) |
694bf407 | 145 | return SYMBOL_B; |
3445432b | 146 | |
fb6d5942 | 147 | return arch__choose_best_symbol(syma, symb); |
694bf407 AB |
148 | } |
149 | ||
e5a1845f | 150 | void symbols__fixup_duplicate(struct rb_root *symbols) |
694bf407 AB |
151 | { |
152 | struct rb_node *nd; | |
153 | struct symbol *curr, *next; | |
154 | ||
155 | nd = rb_first(symbols); | |
156 | ||
157 | while (nd) { | |
158 | curr = rb_entry(nd, struct symbol, rb_node); | |
159 | again: | |
160 | nd = rb_next(&curr->rb_node); | |
161 | next = rb_entry(nd, struct symbol, rb_node); | |
162 | ||
163 | if (!nd) | |
164 | break; | |
165 | ||
166 | if (curr->start != next->start) | |
167 | continue; | |
168 | ||
169 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
170 | rb_erase(&next->rb_node, symbols); | |
d4f74eb8 | 171 | symbol__delete(next); |
694bf407 AB |
172 | goto again; |
173 | } else { | |
174 | nd = rb_next(&curr->rb_node); | |
175 | rb_erase(&curr->rb_node, symbols); | |
d4f74eb8 | 176 | symbol__delete(curr); |
694bf407 AB |
177 | } |
178 | } | |
179 | } | |
180 | ||
e5a1845f | 181 | void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 182 | { |
aeafcbaf | 183 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 184 | struct symbol *curr, *prev; |
af427bf5 ACM |
185 | |
186 | if (prevnd == NULL) | |
187 | return; | |
188 | ||
2e538c4a ACM |
189 | curr = rb_entry(prevnd, struct symbol, rb_node); |
190 | ||
af427bf5 | 191 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
192 | prev = curr; |
193 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 194 | |
3b01a413 | 195 | if (prev->end == prev->start && prev->end != curr->start) |
2c241bd3 | 196 | prev->end = curr->start; |
af427bf5 | 197 | } |
2e538c4a ACM |
198 | |
199 | /* Last entry */ | |
200 | if (curr->end == curr->start) | |
201 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
202 | } |
203 | ||
e5a1845f | 204 | void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 | 205 | { |
1eee78ae | 206 | struct maps *maps = &mg->maps[type]; |
4bb7123d | 207 | struct map *next, *curr; |
af427bf5 | 208 | |
6a2ffcdd ACM |
209 | pthread_rwlock_wrlock(&maps->lock); |
210 | ||
4bb7123d ACM |
211 | curr = maps__first(maps); |
212 | if (curr == NULL) | |
6a2ffcdd | 213 | goto out_unlock; |
af427bf5 | 214 | |
4bb7123d ACM |
215 | for (next = map__next(curr); next; next = map__next(curr)) { |
216 | curr->end = next->start; | |
217 | curr = next; | |
2e538c4a | 218 | } |
90c83218 ACM |
219 | |
220 | /* | |
221 | * We still haven't the actual symbols, so guess the | |
222 | * last map final address. | |
223 | */ | |
9d1faba5 | 224 | curr->end = ~0ULL; |
6a2ffcdd ACM |
225 | |
226 | out_unlock: | |
227 | pthread_rwlock_unlock(&maps->lock); | |
af427bf5 ACM |
228 | } |
229 | ||
e5a1845f | 230 | struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name) |
a2928c42 | 231 | { |
0085c954 | 232 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
233 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
234 | sizeof(*sym) + namelen)); | |
235 | if (sym == NULL) | |
0b73da3f IM |
236 | return NULL; |
237 | ||
75be6cf4 | 238 | if (symbol_conf.priv_size) |
aeafcbaf | 239 | sym = ((void *)sym) + symbol_conf.priv_size; |
e4204992 | 240 | |
aeafcbaf | 241 | sym->start = start; |
2c241bd3 | 242 | sym->end = len ? start + len : start; |
aeafcbaf ACM |
243 | sym->binding = binding; |
244 | sym->namelen = namelen - 1; | |
e4204992 | 245 | |
aeafcbaf ACM |
246 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
247 | __func__, name, start, sym->end); | |
248 | memcpy(sym->name, name, namelen); | |
a2928c42 | 249 | |
aeafcbaf | 250 | return sym; |
a2928c42 ACM |
251 | } |
252 | ||
aeafcbaf | 253 | void symbol__delete(struct symbol *sym) |
a2928c42 | 254 | { |
aeafcbaf | 255 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
256 | } |
257 | ||
cdd059d7 | 258 | void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
259 | { |
260 | struct symbol *pos; | |
aeafcbaf | 261 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
262 | |
263 | while (next) { | |
264 | pos = rb_entry(next, struct symbol, rb_node); | |
265 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 266 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 267 | symbol__delete(pos); |
a2928c42 ACM |
268 | } |
269 | } | |
270 | ||
e5a1845f | 271 | void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
a2928c42 | 272 | { |
aeafcbaf | 273 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 274 | struct rb_node *parent = NULL; |
9cffa8d5 | 275 | const u64 ip = sym->start; |
a2928c42 ACM |
276 | struct symbol *s; |
277 | ||
278 | while (*p != NULL) { | |
279 | parent = *p; | |
280 | s = rb_entry(parent, struct symbol, rb_node); | |
281 | if (ip < s->start) | |
282 | p = &(*p)->rb_left; | |
283 | else | |
284 | p = &(*p)->rb_right; | |
285 | } | |
286 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 287 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
288 | } |
289 | ||
aeafcbaf | 290 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
291 | { |
292 | struct rb_node *n; | |
293 | ||
aeafcbaf | 294 | if (symbols == NULL) |
a2928c42 ACM |
295 | return NULL; |
296 | ||
aeafcbaf | 297 | n = symbols->rb_node; |
a2928c42 ACM |
298 | |
299 | while (n) { | |
300 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
301 | ||
302 | if (ip < s->start) | |
303 | n = n->rb_left; | |
9c7b37cd | 304 | else if (ip > s->end || (ip == s->end && ip != s->start)) |
a2928c42 ACM |
305 | n = n->rb_right; |
306 | else | |
307 | return s; | |
308 | } | |
309 | ||
310 | return NULL; | |
311 | } | |
312 | ||
8e0cf965 AH |
313 | static struct symbol *symbols__first(struct rb_root *symbols) |
314 | { | |
315 | struct rb_node *n = rb_first(symbols); | |
316 | ||
317 | if (n) | |
318 | return rb_entry(n, struct symbol, rb_node); | |
319 | ||
320 | return NULL; | |
321 | } | |
322 | ||
9c00a81b AH |
323 | static struct symbol *symbols__next(struct symbol *sym) |
324 | { | |
325 | struct rb_node *n = rb_next(&sym->rb_node); | |
326 | ||
327 | if (n) | |
328 | return rb_entry(n, struct symbol, rb_node); | |
329 | ||
330 | return NULL; | |
331 | } | |
332 | ||
aeafcbaf | 333 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 334 | { |
aeafcbaf | 335 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 336 | struct rb_node *parent = NULL; |
02a9d037 RV |
337 | struct symbol_name_rb_node *symn, *s; |
338 | ||
339 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
340 | |
341 | while (*p != NULL) { | |
342 | parent = *p; | |
343 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
344 | if (strcmp(sym->name, s->sym.name) < 0) | |
345 | p = &(*p)->rb_left; | |
346 | else | |
347 | p = &(*p)->rb_right; | |
348 | } | |
349 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 350 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
351 | } |
352 | ||
aeafcbaf ACM |
353 | static void symbols__sort_by_name(struct rb_root *symbols, |
354 | struct rb_root *source) | |
79406cd7 ACM |
355 | { |
356 | struct rb_node *nd; | |
357 | ||
358 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
359 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 360 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
361 | } |
362 | } | |
363 | ||
aeafcbaf ACM |
364 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
365 | const char *name) | |
79406cd7 ACM |
366 | { |
367 | struct rb_node *n; | |
5bcaaca3 | 368 | struct symbol_name_rb_node *s = NULL; |
79406cd7 | 369 | |
aeafcbaf | 370 | if (symbols == NULL) |
79406cd7 ACM |
371 | return NULL; |
372 | ||
aeafcbaf | 373 | n = symbols->rb_node; |
79406cd7 ACM |
374 | |
375 | while (n) { | |
79406cd7 ACM |
376 | int cmp; |
377 | ||
378 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
031b84c4 | 379 | cmp = arch__compare_symbol_names(name, s->sym.name); |
79406cd7 ACM |
380 | |
381 | if (cmp < 0) | |
382 | n = n->rb_left; | |
383 | else if (cmp > 0) | |
384 | n = n->rb_right; | |
385 | else | |
de480999 | 386 | break; |
79406cd7 ACM |
387 | } |
388 | ||
de480999 NK |
389 | if (n == NULL) |
390 | return NULL; | |
391 | ||
392 | /* return first symbol that has same name (if any) */ | |
393 | for (n = rb_prev(n); n; n = rb_prev(n)) { | |
394 | struct symbol_name_rb_node *tmp; | |
395 | ||
396 | tmp = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
031b84c4 | 397 | if (arch__compare_symbol_names(tmp->sym.name, s->sym.name)) |
de480999 NK |
398 | break; |
399 | ||
400 | s = tmp; | |
401 | } | |
402 | ||
403 | return &s->sym; | |
79406cd7 ACM |
404 | } |
405 | ||
c0b4dffb ACM |
406 | void dso__reset_find_symbol_cache(struct dso *dso) |
407 | { | |
408 | enum map_type type; | |
409 | ||
410 | for (type = MAP__FUNCTION; type <= MAP__VARIABLE; ++type) { | |
411 | dso->last_find_result[type].addr = 0; | |
412 | dso->last_find_result[type].symbol = NULL; | |
413 | } | |
414 | } | |
415 | ||
ae93a6c7 CP |
416 | void dso__insert_symbol(struct dso *dso, enum map_type type, struct symbol *sym) |
417 | { | |
418 | symbols__insert(&dso->symbols[type], sym); | |
419 | ||
420 | /* update the symbol cache if necessary */ | |
421 | if (dso->last_find_result[type].addr >= sym->start && | |
422 | (dso->last_find_result[type].addr < sym->end || | |
423 | sym->start == sym->end)) { | |
424 | dso->last_find_result[type].symbol = sym; | |
425 | } | |
426 | } | |
427 | ||
aeafcbaf | 428 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 429 | enum map_type type, u64 addr) |
fcf1203a | 430 | { |
b685ac22 ACM |
431 | if (dso->last_find_result[type].addr != addr) { |
432 | dso->last_find_result[type].addr = addr; | |
433 | dso->last_find_result[type].symbol = symbols__find(&dso->symbols[type], addr); | |
434 | } | |
435 | ||
436 | return dso->last_find_result[type].symbol; | |
fcf1203a ACM |
437 | } |
438 | ||
9c00a81b | 439 | struct symbol *dso__first_symbol(struct dso *dso, enum map_type type) |
8e0cf965 AH |
440 | { |
441 | return symbols__first(&dso->symbols[type]); | |
9c00a81b AH |
442 | } |
443 | ||
444 | struct symbol *dso__next_symbol(struct symbol *sym) | |
445 | { | |
446 | return symbols__next(sym); | |
8e0cf965 AH |
447 | } |
448 | ||
18bd7264 ACM |
449 | struct symbol *symbol__next_by_name(struct symbol *sym) |
450 | { | |
451 | struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym); | |
452 | struct rb_node *n = rb_next(&s->rb_node); | |
453 | ||
454 | return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL; | |
455 | } | |
456 | ||
457 | /* | |
458 | * Teturns first symbol that matched with @name. | |
459 | */ | |
aeafcbaf | 460 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
461 | const char *name) |
462 | { | |
aeafcbaf | 463 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
464 | } |
465 | ||
aeafcbaf | 466 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 467 | { |
aeafcbaf ACM |
468 | dso__set_sorted_by_name(dso, type); |
469 | return symbols__sort_by_name(&dso->symbol_names[type], | |
470 | &dso->symbols[type]); | |
79406cd7 ACM |
471 | } |
472 | ||
316d70d6 AH |
473 | int modules__parse(const char *filename, void *arg, |
474 | int (*process_module)(void *arg, const char *name, | |
475 | u64 start)) | |
476 | { | |
477 | char *line = NULL; | |
478 | size_t n; | |
479 | FILE *file; | |
480 | int err = 0; | |
481 | ||
482 | file = fopen(filename, "r"); | |
483 | if (file == NULL) | |
484 | return -1; | |
485 | ||
486 | while (1) { | |
487 | char name[PATH_MAX]; | |
488 | u64 start; | |
489 | char *sep; | |
490 | ssize_t line_len; | |
491 | ||
492 | line_len = getline(&line, &n, file); | |
493 | if (line_len < 0) { | |
494 | if (feof(file)) | |
495 | break; | |
496 | err = -1; | |
497 | goto out; | |
498 | } | |
499 | ||
500 | if (!line) { | |
501 | err = -1; | |
502 | goto out; | |
503 | } | |
504 | ||
505 | line[--line_len] = '\0'; /* \n */ | |
506 | ||
507 | sep = strrchr(line, 'x'); | |
508 | if (sep == NULL) | |
509 | continue; | |
510 | ||
511 | hex2u64(sep + 1, &start); | |
512 | ||
513 | sep = strchr(line, ' '); | |
514 | if (sep == NULL) | |
515 | continue; | |
516 | ||
517 | *sep = '\0'; | |
518 | ||
519 | scnprintf(name, sizeof(name), "[%s]", line); | |
520 | ||
521 | err = process_module(arg, name, start); | |
522 | if (err) | |
523 | break; | |
524 | } | |
525 | out: | |
526 | free(line); | |
527 | fclose(file); | |
528 | return err; | |
529 | } | |
530 | ||
682b335a ACM |
531 | struct process_kallsyms_args { |
532 | struct map *map; | |
533 | struct dso *dso; | |
534 | }; | |
535 | ||
e7110b9f ACM |
536 | /* |
537 | * These are symbols in the kernel image, so make sure that | |
538 | * sym is from a kernel DSO. | |
539 | */ | |
82d1deb0 DA |
540 | bool symbol__is_idle(struct symbol *sym) |
541 | { | |
542 | const char * const idle_symbols[] = { | |
543 | "cpu_idle", | |
e0336ed6 | 544 | "cpu_startup_entry", |
82d1deb0 DA |
545 | "intel_idle", |
546 | "default_idle", | |
547 | "native_safe_halt", | |
548 | "enter_idle", | |
549 | "exit_idle", | |
550 | "mwait_idle", | |
551 | "mwait_idle_with_hints", | |
552 | "poll_idle", | |
553 | "ppc64_runlatch_off", | |
554 | "pseries_dedicated_idle_sleep", | |
555 | NULL | |
556 | }; | |
557 | ||
558 | int i; | |
559 | ||
560 | if (!sym) | |
561 | return false; | |
562 | ||
563 | for (i = 0; idle_symbols[i]; i++) { | |
564 | if (!strcmp(idle_symbols[i], sym->name)) | |
565 | return true; | |
566 | } | |
567 | ||
568 | return false; | |
569 | } | |
570 | ||
682b335a | 571 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 572 | char type, u64 start) |
682b335a ACM |
573 | { |
574 | struct symbol *sym; | |
575 | struct process_kallsyms_args *a = arg; | |
576 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
577 | ||
578 | if (!symbol_type__is_a(type, a->map->type)) | |
579 | return 0; | |
580 | ||
82151520 CS |
581 | /* |
582 | * module symbols are not sorted so we add all | |
583 | * symbols, setting length to 0, and rely on | |
584 | * symbols__fixup_end() to fix it up. | |
585 | */ | |
8e947f1e | 586 | sym = symbol__new(start, 0, kallsyms2elf_binding(type), name); |
682b335a ACM |
587 | if (sym == NULL) |
588 | return -ENOMEM; | |
589 | /* | |
590 | * We will pass the symbols to the filter later, in | |
591 | * map__split_kallsyms, when we have split the maps per module | |
592 | */ | |
593 | symbols__insert(root, sym); | |
a1645ce1 | 594 | |
682b335a ACM |
595 | return 0; |
596 | } | |
597 | ||
598 | /* | |
599 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
600 | * so that we can in the next step set the symbol ->end address and then | |
601 | * call kernel_maps__split_kallsyms. | |
602 | */ | |
aeafcbaf | 603 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 604 | struct map *map) |
682b335a | 605 | { |
aeafcbaf | 606 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 607 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
608 | } |
609 | ||
8e0cf965 AH |
610 | static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map, |
611 | symbol_filter_t filter) | |
612 | { | |
ba92732e | 613 | struct map_groups *kmaps = map__kmaps(map); |
8e0cf965 AH |
614 | struct map *curr_map; |
615 | struct symbol *pos; | |
866548dd AH |
616 | int count = 0; |
617 | struct rb_root old_root = dso->symbols[map->type]; | |
8e0cf965 AH |
618 | struct rb_root *root = &dso->symbols[map->type]; |
619 | struct rb_node *next = rb_first(root); | |
620 | ||
ba92732e WN |
621 | if (!kmaps) |
622 | return -1; | |
623 | ||
866548dd AH |
624 | *root = RB_ROOT; |
625 | ||
8e0cf965 AH |
626 | while (next) { |
627 | char *module; | |
628 | ||
629 | pos = rb_entry(next, struct symbol, rb_node); | |
630 | next = rb_next(&pos->rb_node); | |
631 | ||
866548dd AH |
632 | rb_erase_init(&pos->rb_node, &old_root); |
633 | ||
8e0cf965 AH |
634 | module = strchr(pos->name, '\t'); |
635 | if (module) | |
636 | *module = '\0'; | |
637 | ||
638 | curr_map = map_groups__find(kmaps, map->type, pos->start); | |
639 | ||
640 | if (!curr_map || (filter && filter(curr_map, pos))) { | |
8e0cf965 | 641 | symbol__delete(pos); |
866548dd | 642 | continue; |
8e0cf965 | 643 | } |
866548dd AH |
644 | |
645 | pos->start -= curr_map->start - curr_map->pgoff; | |
646 | if (pos->end) | |
647 | pos->end -= curr_map->start - curr_map->pgoff; | |
648 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
649 | ++count; | |
8e0cf965 AH |
650 | } |
651 | ||
652 | /* Symbols have been adjusted */ | |
653 | dso->adjust_symbols = 1; | |
654 | ||
866548dd | 655 | return count; |
8e0cf965 AH |
656 | } |
657 | ||
2e538c4a ACM |
658 | /* |
659 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
660 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
661 | * the original ELF section names vmlinux have. | |
662 | */ | |
d9b62aba | 663 | static int dso__split_kallsyms(struct dso *dso, struct map *map, u64 delta, |
9de89fe7 | 664 | symbol_filter_t filter) |
2e538c4a | 665 | { |
ba92732e WN |
666 | struct map_groups *kmaps = map__kmaps(map); |
667 | struct machine *machine; | |
4e06255f | 668 | struct map *curr_map = map; |
2e538c4a | 669 | struct symbol *pos; |
48000a1a | 670 | int count = 0, moved = 0; |
aeafcbaf | 671 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 672 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
673 | int kernel_range = 0; |
674 | ||
ba92732e WN |
675 | if (!kmaps) |
676 | return -1; | |
677 | ||
678 | machine = kmaps->machine; | |
679 | ||
2e538c4a ACM |
680 | while (next) { |
681 | char *module; | |
682 | ||
683 | pos = rb_entry(next, struct symbol, rb_node); | |
684 | next = rb_next(&pos->rb_node); | |
685 | ||
686 | module = strchr(pos->name, '\t'); | |
687 | if (module) { | |
75be6cf4 | 688 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
689 | goto discard_symbol; |
690 | ||
2e538c4a ACM |
691 | *module++ = '\0'; |
692 | ||
b7cece76 | 693 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 694 | if (curr_map != map && |
aeafcbaf | 695 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 696 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
697 | /* |
698 | * We assume all symbols of a module are | |
699 | * continuous in * kallsyms, so curr_map | |
700 | * points to a module and all its | |
701 | * symbols are in its kmap. Mark it as | |
702 | * loaded. | |
703 | */ | |
704 | dso__set_loaded(curr_map->dso, | |
705 | curr_map->type); | |
706 | } | |
707 | ||
708 | curr_map = map_groups__find_by_name(kmaps, | |
709 | map->type, module); | |
4e06255f | 710 | if (curr_map == NULL) { |
2f51903b | 711 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 712 | "inconsistency while looking " |
a1645ce1 | 713 | "for \"%s\" module!\n", |
23346f21 | 714 | machine->root_dir, module); |
a1645ce1 ZY |
715 | curr_map = map; |
716 | goto discard_symbol; | |
af427bf5 | 717 | } |
b7cece76 | 718 | |
a1645ce1 | 719 | if (curr_map->dso->loaded && |
23346f21 | 720 | !machine__is_default_guest(machine)) |
b7cece76 | 721 | goto discard_symbol; |
af427bf5 | 722 | } |
2e538c4a ACM |
723 | /* |
724 | * So that we look just like we get from .ko files, | |
725 | * i.e. not prelinked, relative to map->start. | |
726 | */ | |
4e06255f ACM |
727 | pos->start = curr_map->map_ip(curr_map, pos->start); |
728 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
729 | } else if (curr_map != map) { | |
2e538c4a | 730 | char dso_name[PATH_MAX]; |
aeafcbaf | 731 | struct dso *ndso; |
2e538c4a | 732 | |
d9b62aba AH |
733 | if (delta) { |
734 | /* Kernel was relocated at boot time */ | |
735 | pos->start -= delta; | |
736 | pos->end -= delta; | |
737 | } | |
738 | ||
8a953312 ACM |
739 | if (count == 0) { |
740 | curr_map = map; | |
741 | goto filter_symbol; | |
742 | } | |
743 | ||
aeafcbaf | 744 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
745 | snprintf(dso_name, sizeof(dso_name), |
746 | "[guest.kernel].%d", | |
747 | kernel_range++); | |
748 | else | |
749 | snprintf(dso_name, sizeof(dso_name), | |
750 | "[kernel].%d", | |
751 | kernel_range++); | |
2e538c4a | 752 | |
aeafcbaf ACM |
753 | ndso = dso__new(dso_name); |
754 | if (ndso == NULL) | |
2e538c4a ACM |
755 | return -1; |
756 | ||
aeafcbaf | 757 | ndso->kernel = dso->kernel; |
a1645ce1 | 758 | |
aeafcbaf | 759 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 760 | if (curr_map == NULL) { |
d3a7c489 | 761 | dso__put(ndso); |
2e538c4a ACM |
762 | return -1; |
763 | } | |
a2928c42 | 764 | |
4e06255f | 765 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 766 | map_groups__insert(kmaps, curr_map); |
2e538c4a | 767 | ++kernel_range; |
d9b62aba AH |
768 | } else if (delta) { |
769 | /* Kernel was relocated at boot time */ | |
770 | pos->start -= delta; | |
771 | pos->end -= delta; | |
2e538c4a | 772 | } |
8a953312 | 773 | filter_symbol: |
4e06255f | 774 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 775 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 776 | symbol__delete(pos); |
2e538c4a | 777 | } else { |
4e06255f ACM |
778 | if (curr_map != map) { |
779 | rb_erase(&pos->rb_node, root); | |
780 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
781 | ++moved; |
782 | } else | |
783 | ++count; | |
9974f496 | 784 | } |
a2928c42 ACM |
785 | } |
786 | ||
a1645ce1 | 787 | if (curr_map != map && |
aeafcbaf | 788 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 789 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
790 | dso__set_loaded(curr_map->dso, curr_map->type); |
791 | } | |
792 | ||
8a953312 | 793 | return count + moved; |
2e538c4a | 794 | } |
a2928c42 | 795 | |
3f067dca ACM |
796 | bool symbol__restricted_filename(const char *filename, |
797 | const char *restricted_filename) | |
ec80fde7 ACM |
798 | { |
799 | bool restricted = false; | |
800 | ||
801 | if (symbol_conf.kptr_restrict) { | |
802 | char *r = realpath(filename, NULL); | |
803 | ||
804 | if (r != NULL) { | |
805 | restricted = strcmp(r, restricted_filename) == 0; | |
806 | free(r); | |
807 | return restricted; | |
808 | } | |
809 | } | |
810 | ||
811 | return restricted; | |
812 | } | |
813 | ||
52afdaf9 AH |
814 | struct module_info { |
815 | struct rb_node rb_node; | |
816 | char *name; | |
817 | u64 start; | |
8e0cf965 AH |
818 | }; |
819 | ||
52afdaf9 | 820 | static void add_module(struct module_info *mi, struct rb_root *modules) |
8e0cf965 | 821 | { |
52afdaf9 AH |
822 | struct rb_node **p = &modules->rb_node; |
823 | struct rb_node *parent = NULL; | |
824 | struct module_info *m; | |
8e0cf965 | 825 | |
52afdaf9 AH |
826 | while (*p != NULL) { |
827 | parent = *p; | |
828 | m = rb_entry(parent, struct module_info, rb_node); | |
829 | if (strcmp(mi->name, m->name) < 0) | |
830 | p = &(*p)->rb_left; | |
831 | else | |
832 | p = &(*p)->rb_right; | |
833 | } | |
834 | rb_link_node(&mi->rb_node, parent, p); | |
835 | rb_insert_color(&mi->rb_node, modules); | |
836 | } | |
837 | ||
838 | static void delete_modules(struct rb_root *modules) | |
839 | { | |
840 | struct module_info *mi; | |
841 | struct rb_node *next = rb_first(modules); | |
842 | ||
843 | while (next) { | |
844 | mi = rb_entry(next, struct module_info, rb_node); | |
845 | next = rb_next(&mi->rb_node); | |
846 | rb_erase(&mi->rb_node, modules); | |
74cf249d | 847 | zfree(&mi->name); |
52afdaf9 AH |
848 | free(mi); |
849 | } | |
850 | } | |
851 | ||
852 | static struct module_info *find_module(const char *name, | |
853 | struct rb_root *modules) | |
854 | { | |
855 | struct rb_node *n = modules->rb_node; | |
856 | ||
857 | while (n) { | |
858 | struct module_info *m; | |
859 | int cmp; | |
860 | ||
861 | m = rb_entry(n, struct module_info, rb_node); | |
862 | cmp = strcmp(name, m->name); | |
863 | if (cmp < 0) | |
864 | n = n->rb_left; | |
865 | else if (cmp > 0) | |
866 | n = n->rb_right; | |
867 | else | |
868 | return m; | |
869 | } | |
870 | ||
871 | return NULL; | |
872 | } | |
873 | ||
874 | static int __read_proc_modules(void *arg, const char *name, u64 start) | |
875 | { | |
876 | struct rb_root *modules = arg; | |
877 | struct module_info *mi; | |
878 | ||
879 | mi = zalloc(sizeof(struct module_info)); | |
880 | if (!mi) | |
8e0cf965 AH |
881 | return -ENOMEM; |
882 | ||
52afdaf9 AH |
883 | mi->name = strdup(name); |
884 | mi->start = start; | |
8e0cf965 | 885 | |
52afdaf9 AH |
886 | if (!mi->name) { |
887 | free(mi); | |
888 | return -ENOMEM; | |
889 | } | |
890 | ||
891 | add_module(mi, modules); | |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
896 | static int read_proc_modules(const char *filename, struct rb_root *modules) | |
897 | { | |
898 | if (symbol__restricted_filename(filename, "/proc/modules")) | |
899 | return -1; | |
900 | ||
901 | if (modules__parse(filename, modules, __read_proc_modules)) { | |
902 | delete_modules(modules); | |
903 | return -1; | |
904 | } | |
8e0cf965 AH |
905 | |
906 | return 0; | |
907 | } | |
908 | ||
fc1b691d AH |
909 | int compare_proc_modules(const char *from, const char *to) |
910 | { | |
911 | struct rb_root from_modules = RB_ROOT; | |
912 | struct rb_root to_modules = RB_ROOT; | |
913 | struct rb_node *from_node, *to_node; | |
914 | struct module_info *from_m, *to_m; | |
915 | int ret = -1; | |
916 | ||
917 | if (read_proc_modules(from, &from_modules)) | |
918 | return -1; | |
919 | ||
920 | if (read_proc_modules(to, &to_modules)) | |
921 | goto out_delete_from; | |
922 | ||
923 | from_node = rb_first(&from_modules); | |
924 | to_node = rb_first(&to_modules); | |
925 | while (from_node) { | |
926 | if (!to_node) | |
927 | break; | |
928 | ||
929 | from_m = rb_entry(from_node, struct module_info, rb_node); | |
930 | to_m = rb_entry(to_node, struct module_info, rb_node); | |
931 | ||
932 | if (from_m->start != to_m->start || | |
933 | strcmp(from_m->name, to_m->name)) | |
934 | break; | |
935 | ||
936 | from_node = rb_next(from_node); | |
937 | to_node = rb_next(to_node); | |
938 | } | |
939 | ||
940 | if (!from_node && !to_node) | |
941 | ret = 0; | |
942 | ||
943 | delete_modules(&to_modules); | |
944 | out_delete_from: | |
945 | delete_modules(&from_modules); | |
946 | ||
947 | return ret; | |
948 | } | |
949 | ||
52afdaf9 AH |
950 | static int do_validate_kcore_modules(const char *filename, struct map *map, |
951 | struct map_groups *kmaps) | |
952 | { | |
953 | struct rb_root modules = RB_ROOT; | |
954 | struct map *old_map; | |
955 | int err; | |
956 | ||
957 | err = read_proc_modules(filename, &modules); | |
958 | if (err) | |
959 | return err; | |
960 | ||
961 | old_map = map_groups__first(kmaps, map->type); | |
962 | while (old_map) { | |
963 | struct map *next = map_groups__next(old_map); | |
964 | struct module_info *mi; | |
965 | ||
966 | if (old_map == map || old_map->start == map->start) { | |
967 | /* The kernel map */ | |
968 | old_map = next; | |
969 | continue; | |
970 | } | |
971 | ||
972 | /* Module must be in memory at the same address */ | |
973 | mi = find_module(old_map->dso->short_name, &modules); | |
974 | if (!mi || mi->start != old_map->start) { | |
975 | err = -EINVAL; | |
976 | goto out; | |
977 | } | |
978 | ||
979 | old_map = next; | |
980 | } | |
981 | out: | |
982 | delete_modules(&modules); | |
983 | return err; | |
984 | } | |
985 | ||
8e0cf965 | 986 | /* |
52afdaf9 | 987 | * If kallsyms is referenced by name then we look for filename in the same |
8e0cf965 AH |
988 | * directory. |
989 | */ | |
52afdaf9 AH |
990 | static bool filename_from_kallsyms_filename(char *filename, |
991 | const char *base_name, | |
992 | const char *kallsyms_filename) | |
8e0cf965 AH |
993 | { |
994 | char *name; | |
995 | ||
52afdaf9 AH |
996 | strcpy(filename, kallsyms_filename); |
997 | name = strrchr(filename, '/'); | |
8e0cf965 AH |
998 | if (!name) |
999 | return false; | |
1000 | ||
52afdaf9 AH |
1001 | name += 1; |
1002 | ||
1003 | if (!strcmp(name, "kallsyms")) { | |
1004 | strcpy(name, base_name); | |
8e0cf965 AH |
1005 | return true; |
1006 | } | |
1007 | ||
1008 | return false; | |
1009 | } | |
1010 | ||
52afdaf9 AH |
1011 | static int validate_kcore_modules(const char *kallsyms_filename, |
1012 | struct map *map) | |
1013 | { | |
ba92732e | 1014 | struct map_groups *kmaps = map__kmaps(map); |
52afdaf9 AH |
1015 | char modules_filename[PATH_MAX]; |
1016 | ||
ba92732e WN |
1017 | if (!kmaps) |
1018 | return -EINVAL; | |
1019 | ||
52afdaf9 AH |
1020 | if (!filename_from_kallsyms_filename(modules_filename, "modules", |
1021 | kallsyms_filename)) | |
1022 | return -EINVAL; | |
1023 | ||
1024 | if (do_validate_kcore_modules(modules_filename, map, kmaps)) | |
1025 | return -EINVAL; | |
1026 | ||
1027 | return 0; | |
1028 | } | |
1029 | ||
a00d28cb AH |
1030 | static int validate_kcore_addresses(const char *kallsyms_filename, |
1031 | struct map *map) | |
1032 | { | |
1033 | struct kmap *kmap = map__kmap(map); | |
1034 | ||
ba92732e WN |
1035 | if (!kmap) |
1036 | return -EINVAL; | |
1037 | ||
a00d28cb AH |
1038 | if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) { |
1039 | u64 start; | |
1040 | ||
1041 | start = kallsyms__get_function_start(kallsyms_filename, | |
1042 | kmap->ref_reloc_sym->name); | |
1043 | if (start != kmap->ref_reloc_sym->addr) | |
1044 | return -EINVAL; | |
1045 | } | |
1046 | ||
1047 | return validate_kcore_modules(kallsyms_filename, map); | |
1048 | } | |
1049 | ||
52afdaf9 AH |
1050 | struct kcore_mapfn_data { |
1051 | struct dso *dso; | |
1052 | enum map_type type; | |
1053 | struct list_head maps; | |
1054 | }; | |
1055 | ||
1056 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
1057 | { | |
1058 | struct kcore_mapfn_data *md = data; | |
1059 | struct map *map; | |
1060 | ||
1061 | map = map__new2(start, md->dso, md->type); | |
1062 | if (map == NULL) | |
1063 | return -ENOMEM; | |
1064 | ||
1065 | map->end = map->start + len; | |
1066 | map->pgoff = pgoff; | |
1067 | ||
1068 | list_add(&map->node, &md->maps); | |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | ||
8e0cf965 AH |
1073 | static int dso__load_kcore(struct dso *dso, struct map *map, |
1074 | const char *kallsyms_filename) | |
1075 | { | |
ba92732e WN |
1076 | struct map_groups *kmaps = map__kmaps(map); |
1077 | struct machine *machine; | |
8e0cf965 AH |
1078 | struct kcore_mapfn_data md; |
1079 | struct map *old_map, *new_map, *replacement_map = NULL; | |
1080 | bool is_64_bit; | |
1081 | int err, fd; | |
1082 | char kcore_filename[PATH_MAX]; | |
1083 | struct symbol *sym; | |
1084 | ||
ba92732e WN |
1085 | if (!kmaps) |
1086 | return -EINVAL; | |
1087 | ||
1088 | machine = kmaps->machine; | |
1089 | ||
8e0cf965 AH |
1090 | /* This function requires that the map is the kernel map */ |
1091 | if (map != machine->vmlinux_maps[map->type]) | |
1092 | return -EINVAL; | |
1093 | ||
52afdaf9 AH |
1094 | if (!filename_from_kallsyms_filename(kcore_filename, "kcore", |
1095 | kallsyms_filename)) | |
1096 | return -EINVAL; | |
1097 | ||
a00d28cb AH |
1098 | /* Modules and kernel must be present at their original addresses */ |
1099 | if (validate_kcore_addresses(kallsyms_filename, map)) | |
8e0cf965 AH |
1100 | return -EINVAL; |
1101 | ||
1102 | md.dso = dso; | |
1103 | md.type = map->type; | |
1104 | INIT_LIST_HEAD(&md.maps); | |
1105 | ||
1106 | fd = open(kcore_filename, O_RDONLY); | |
36c8bb56 | 1107 | if (fd < 0) { |
133de940 AH |
1108 | pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n", |
1109 | kcore_filename); | |
8e0cf965 | 1110 | return -EINVAL; |
36c8bb56 | 1111 | } |
8e0cf965 AH |
1112 | |
1113 | /* Read new maps into temporary lists */ | |
1114 | err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md, | |
1115 | &is_64_bit); | |
1116 | if (err) | |
1117 | goto out_err; | |
c6d8f2a4 | 1118 | dso->is_64_bit = is_64_bit; |
8e0cf965 AH |
1119 | |
1120 | if (list_empty(&md.maps)) { | |
1121 | err = -EINVAL; | |
1122 | goto out_err; | |
1123 | } | |
1124 | ||
1125 | /* Remove old maps */ | |
1126 | old_map = map_groups__first(kmaps, map->type); | |
1127 | while (old_map) { | |
1128 | struct map *next = map_groups__next(old_map); | |
1129 | ||
1130 | if (old_map != map) | |
1131 | map_groups__remove(kmaps, old_map); | |
1132 | old_map = next; | |
1133 | } | |
1134 | ||
1135 | /* Find the kernel map using the first symbol */ | |
1136 | sym = dso__first_symbol(dso, map->type); | |
1137 | list_for_each_entry(new_map, &md.maps, node) { | |
1138 | if (sym && sym->start >= new_map->start && | |
1139 | sym->start < new_map->end) { | |
1140 | replacement_map = new_map; | |
1141 | break; | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | if (!replacement_map) | |
1146 | replacement_map = list_entry(md.maps.next, struct map, node); | |
1147 | ||
1148 | /* Add new maps */ | |
1149 | while (!list_empty(&md.maps)) { | |
1150 | new_map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1151 | list_del_init(&new_map->node); |
8e0cf965 AH |
1152 | if (new_map == replacement_map) { |
1153 | map->start = new_map->start; | |
1154 | map->end = new_map->end; | |
1155 | map->pgoff = new_map->pgoff; | |
1156 | map->map_ip = new_map->map_ip; | |
1157 | map->unmap_ip = new_map->unmap_ip; | |
8e0cf965 | 1158 | /* Ensure maps are correctly ordered */ |
84c2cafa | 1159 | map__get(map); |
8e0cf965 AH |
1160 | map_groups__remove(kmaps, map); |
1161 | map_groups__insert(kmaps, map); | |
84c2cafa | 1162 | map__put(map); |
8e0cf965 AH |
1163 | } else { |
1164 | map_groups__insert(kmaps, new_map); | |
1165 | } | |
84c2cafa ACM |
1166 | |
1167 | map__put(new_map); | |
8e0cf965 AH |
1168 | } |
1169 | ||
1170 | /* | |
1171 | * Set the data type and long name so that kcore can be read via | |
1172 | * dso__data_read_addr(). | |
1173 | */ | |
1174 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
5f70619d | 1175 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE; |
8e0cf965 | 1176 | else |
5f70619d | 1177 | dso->binary_type = DSO_BINARY_TYPE__KCORE; |
7e155d4d | 1178 | dso__set_long_name(dso, strdup(kcore_filename), true); |
8e0cf965 AH |
1179 | |
1180 | close(fd); | |
1181 | ||
1182 | if (map->type == MAP__FUNCTION) | |
1183 | pr_debug("Using %s for kernel object code\n", kcore_filename); | |
1184 | else | |
1185 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
1186 | ||
1187 | return 0; | |
1188 | ||
1189 | out_err: | |
1190 | while (!list_empty(&md.maps)) { | |
1191 | map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1192 | list_del_init(&map->node); |
84c2cafa | 1193 | map__put(map); |
8e0cf965 AH |
1194 | } |
1195 | close(fd); | |
1196 | return -EINVAL; | |
1197 | } | |
1198 | ||
d9b62aba AH |
1199 | /* |
1200 | * If the kernel is relocated at boot time, kallsyms won't match. Compute the | |
1201 | * delta based on the relocation reference symbol. | |
1202 | */ | |
1203 | static int kallsyms__delta(struct map *map, const char *filename, u64 *delta) | |
1204 | { | |
1205 | struct kmap *kmap = map__kmap(map); | |
1206 | u64 addr; | |
1207 | ||
ba92732e WN |
1208 | if (!kmap) |
1209 | return -1; | |
1210 | ||
d9b62aba AH |
1211 | if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name) |
1212 | return 0; | |
1213 | ||
1214 | addr = kallsyms__get_function_start(filename, | |
1215 | kmap->ref_reloc_sym->name); | |
1216 | if (!addr) | |
1217 | return -1; | |
1218 | ||
1219 | *delta = addr - kmap->ref_reloc_sym->addr; | |
1220 | return 0; | |
1221 | } | |
1222 | ||
e02092b9 ACM |
1223 | int __dso__load_kallsyms(struct dso *dso, const char *filename, |
1224 | struct map *map, bool no_kcore, symbol_filter_t filter) | |
2e538c4a | 1225 | { |
d9b62aba AH |
1226 | u64 delta = 0; |
1227 | ||
ec80fde7 ACM |
1228 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1229 | return -1; | |
1230 | ||
aeafcbaf | 1231 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
1232 | return -1; |
1233 | ||
d9b62aba AH |
1234 | if (kallsyms__delta(map, filename, &delta)) |
1235 | return -1; | |
1236 | ||
694bf407 | 1237 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
1238 | symbols__fixup_end(&dso->symbols[map->type]); |
1239 | ||
aeafcbaf | 1240 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 1241 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 1242 | else |
44f24cb3 | 1243 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 1244 | |
e02092b9 | 1245 | if (!no_kcore && !dso__load_kcore(dso, map, filename)) |
8e0cf965 AH |
1246 | return dso__split_kallsyms_for_kcore(dso, map, filter); |
1247 | else | |
d9b62aba | 1248 | return dso__split_kallsyms(dso, map, delta, filter); |
af427bf5 ACM |
1249 | } |
1250 | ||
e02092b9 ACM |
1251 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
1252 | struct map *map, symbol_filter_t filter) | |
1253 | { | |
1254 | return __dso__load_kallsyms(dso, filename, map, false, filter); | |
1255 | } | |
1256 | ||
aeafcbaf | 1257 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 1258 | symbol_filter_t filter) |
80d496be PE |
1259 | { |
1260 | char *line = NULL; | |
1261 | size_t n; | |
1262 | FILE *file; | |
1263 | int nr_syms = 0; | |
1264 | ||
aeafcbaf | 1265 | file = fopen(dso->long_name, "r"); |
80d496be PE |
1266 | if (file == NULL) |
1267 | goto out_failure; | |
1268 | ||
1269 | while (!feof(file)) { | |
9cffa8d5 | 1270 | u64 start, size; |
80d496be PE |
1271 | struct symbol *sym; |
1272 | int line_len, len; | |
1273 | ||
1274 | line_len = getline(&line, &n, file); | |
1275 | if (line_len < 0) | |
1276 | break; | |
1277 | ||
1278 | if (!line) | |
1279 | goto out_failure; | |
1280 | ||
1281 | line[--line_len] = '\0'; /* \n */ | |
1282 | ||
1283 | len = hex2u64(line, &start); | |
1284 | ||
1285 | len++; | |
1286 | if (len + 2 >= line_len) | |
1287 | continue; | |
1288 | ||
1289 | len += hex2u64(line + len, &size); | |
1290 | ||
1291 | len++; | |
1292 | if (len + 2 >= line_len) | |
1293 | continue; | |
1294 | ||
c408fedf | 1295 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
1296 | |
1297 | if (sym == NULL) | |
1298 | goto out_delete_line; | |
1299 | ||
439d473b | 1300 | if (filter && filter(map, sym)) |
00a192b3 | 1301 | symbol__delete(sym); |
80d496be | 1302 | else { |
aeafcbaf | 1303 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
1304 | nr_syms++; |
1305 | } | |
1306 | } | |
1307 | ||
1308 | free(line); | |
1309 | fclose(file); | |
1310 | ||
1311 | return nr_syms; | |
1312 | ||
1313 | out_delete_line: | |
1314 | free(line); | |
1315 | out_failure: | |
1316 | return -1; | |
1317 | } | |
1318 | ||
1029f9fe NK |
1319 | static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod, |
1320 | enum dso_binary_type type) | |
1321 | { | |
1322 | switch (type) { | |
1323 | case DSO_BINARY_TYPE__JAVA_JIT: | |
1324 | case DSO_BINARY_TYPE__DEBUGLINK: | |
1325 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
1326 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
1327 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
1328 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: | |
1329 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: | |
1330 | return !kmod && dso->kernel == DSO_TYPE_USER; | |
1331 | ||
1332 | case DSO_BINARY_TYPE__KALLSYMS: | |
1333 | case DSO_BINARY_TYPE__VMLINUX: | |
1334 | case DSO_BINARY_TYPE__KCORE: | |
1335 | return dso->kernel == DSO_TYPE_KERNEL; | |
1336 | ||
1337 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
1338 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
1339 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
1340 | return dso->kernel == DSO_TYPE_GUEST_KERNEL; | |
1341 | ||
1342 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 1343 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
1029f9fe | 1344 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: |
c00c48fc | 1345 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
1029f9fe NK |
1346 | /* |
1347 | * kernel modules know their symtab type - it's set when | |
9f2de315 | 1348 | * creating a module dso in machine__findnew_module_map(). |
1029f9fe NK |
1349 | */ |
1350 | return kmod && dso->symtab_type == type; | |
1351 | ||
1352 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
1353 | return true; | |
1354 | ||
1355 | case DSO_BINARY_TYPE__NOT_FOUND: | |
1356 | default: | |
1357 | return false; | |
1358 | } | |
1359 | } | |
1360 | ||
aeafcbaf | 1361 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1362 | { |
c338aee8 | 1363 | char *name; |
a2928c42 | 1364 | int ret = -1; |
44f24cb3 | 1365 | u_int i; |
23346f21 | 1366 | struct machine *machine; |
44f24cb3 | 1367 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1368 | int ss_pos = 0; |
1369 | struct symsrc ss_[2]; | |
1370 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
1029f9fe | 1371 | bool kmod; |
5baecbcd | 1372 | unsigned char build_id[BUILD_ID_SIZE]; |
a2928c42 | 1373 | |
4a936edc NK |
1374 | pthread_mutex_lock(&dso->lock); |
1375 | ||
1376 | /* check again under the dso->lock */ | |
1377 | if (dso__loaded(dso, map->type)) { | |
1378 | ret = 1; | |
1379 | goto out; | |
1380 | } | |
66bd8424 | 1381 | |
4a936edc NK |
1382 | if (dso->kernel) { |
1383 | if (dso->kernel == DSO_TYPE_KERNEL) | |
1384 | ret = dso__load_kernel_sym(dso, map, filter); | |
1385 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1386 | ret = dso__load_guest_kernel_sym(dso, map, filter); | |
1387 | ||
1388 | goto out; | |
1389 | } | |
a1645ce1 | 1390 | |
23346f21 ACM |
1391 | if (map->groups && map->groups->machine) |
1392 | machine = map->groups->machine; | |
a1645ce1 | 1393 | else |
23346f21 | 1394 | machine = NULL; |
c338aee8 | 1395 | |
aeafcbaf | 1396 | dso->adjust_symbols = 0; |
f5812a7a | 1397 | |
aeafcbaf | 1398 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1399 | struct stat st; |
1400 | ||
e9b52ef2 | 1401 | if (lstat(dso->name, &st) < 0) |
4a936edc | 1402 | goto out; |
981c1252 | 1403 | |
2059fc7a | 1404 | if (!symbol_conf.force && st.st_uid && (st.st_uid != geteuid())) { |
981c1252 | 1405 | pr_warning("File %s not owned by current user or root, " |
2059fc7a | 1406 | "ignoring it (use -f to override).\n", dso->name); |
4a936edc | 1407 | goto out; |
981c1252 PE |
1408 | } |
1409 | ||
aeafcbaf | 1410 | ret = dso__load_perf_map(dso, map, filter); |
44f24cb3 JO |
1411 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1412 | DSO_BINARY_TYPE__NOT_FOUND; | |
4a936edc | 1413 | goto out; |
94cb9e38 ACM |
1414 | } |
1415 | ||
44f24cb3 JO |
1416 | if (machine) |
1417 | root_dir = machine->root_dir; | |
1418 | ||
164c800e DA |
1419 | name = malloc(PATH_MAX); |
1420 | if (!name) | |
4a936edc | 1421 | goto out; |
164c800e | 1422 | |
1029f9fe | 1423 | kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || |
c00c48fc NK |
1424 | dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || |
1425 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE || | |
1426 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
1029f9fe | 1427 | |
5baecbcd DK |
1428 | |
1429 | /* | |
1430 | * Read the build id if possible. This is required for | |
1431 | * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work | |
1432 | */ | |
40356721 JO |
1433 | if (is_regular_file(name) && |
1434 | filename__read_build_id(dso->long_name, build_id, BUILD_ID_SIZE) > 0) | |
5baecbcd DK |
1435 | dso__set_build_id(dso, build_id); |
1436 | ||
1029f9fe NK |
1437 | /* |
1438 | * Iterate over candidate debug images. | |
3aafe5ae CS |
1439 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1440 | * and/or opd section) for processing. | |
6da80ce8 | 1441 | */ |
44f24cb3 | 1442 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1443 | struct symsrc *ss = &ss_[ss_pos]; |
1444 | bool next_slot = false; | |
6da80ce8 | 1445 | |
005f9294 | 1446 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1447 | |
1029f9fe NK |
1448 | if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type)) |
1449 | continue; | |
1450 | ||
ee4e9625 ACM |
1451 | if (dso__read_binary_type_filename(dso, symtab_type, |
1452 | root_dir, name, PATH_MAX)) | |
44f24cb3 | 1453 | continue; |
6da80ce8 | 1454 | |
40356721 JO |
1455 | if (!is_regular_file(name)) |
1456 | continue; | |
1457 | ||
6da80ce8 | 1458 | /* Name is now the name of the next image to try */ |
3aafe5ae | 1459 | if (symsrc__init(ss, dso, name, symtab_type) < 0) |
6da80ce8 | 1460 | continue; |
a2928c42 | 1461 | |
3aafe5ae CS |
1462 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1463 | syms_ss = ss; | |
1464 | next_slot = true; | |
0058aef6 AH |
1465 | if (!dso->symsrc_filename) |
1466 | dso->symsrc_filename = strdup(name); | |
d26cd12b CS |
1467 | } |
1468 | ||
3aafe5ae CS |
1469 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1470 | runtime_ss = ss; | |
1471 | next_slot = true; | |
a44f605b | 1472 | } |
a2928c42 | 1473 | |
3aafe5ae CS |
1474 | if (next_slot) { |
1475 | ss_pos++; | |
33ff581e | 1476 | |
3aafe5ae CS |
1477 | if (syms_ss && runtime_ss) |
1478 | break; | |
98e9f03b NK |
1479 | } else { |
1480 | symsrc__destroy(ss); | |
6da80ce8 | 1481 | } |
3aafe5ae | 1482 | |
a25e46c4 | 1483 | } |
6da80ce8 | 1484 | |
3aafe5ae CS |
1485 | if (!runtime_ss && !syms_ss) |
1486 | goto out_free; | |
1487 | ||
1488 | if (runtime_ss && !syms_ss) { | |
1489 | syms_ss = runtime_ss; | |
1490 | } | |
1491 | ||
1492 | /* We'll have to hope for the best */ | |
1493 | if (!runtime_ss && syms_ss) | |
1494 | runtime_ss = syms_ss; | |
1495 | ||
e7ee4047 WN |
1496 | if (syms_ss && syms_ss->type == DSO_BINARY_TYPE__BUILD_ID_CACHE) |
1497 | if (dso__build_id_is_kmod(dso, name, PATH_MAX)) | |
1498 | kmod = true; | |
1499 | ||
1029f9fe NK |
1500 | if (syms_ss) |
1501 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, kmod); | |
1502 | else | |
3aafe5ae CS |
1503 | ret = -1; |
1504 | ||
f47b58b7 | 1505 | if (ret > 0) { |
3aafe5ae CS |
1506 | int nr_plt; |
1507 | ||
1508 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map, filter); | |
1509 | if (nr_plt > 0) | |
1510 | ret += nr_plt; | |
60e4b10c ACM |
1511 | } |
1512 | ||
3aafe5ae CS |
1513 | for (; ss_pos > 0; ss_pos--) |
1514 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1515 | out_free: | |
a2928c42 | 1516 | free(name); |
aeafcbaf | 1517 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
4a936edc NK |
1518 | ret = 0; |
1519 | out: | |
1520 | dso__set_loaded(dso, map->type); | |
1521 | pthread_mutex_unlock(&dso->lock); | |
1522 | ||
a2928c42 ACM |
1523 | return ret; |
1524 | } | |
1525 | ||
aeafcbaf | 1526 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1527 | enum map_type type, const char *name) |
439d473b | 1528 | { |
1eee78ae | 1529 | struct maps *maps = &mg->maps[type]; |
4bb7123d | 1530 | struct map *map; |
439d473b | 1531 | |
6a2ffcdd ACM |
1532 | pthread_rwlock_rdlock(&maps->lock); |
1533 | ||
4bb7123d | 1534 | for (map = maps__first(maps); map; map = map__next(map)) { |
b7cece76 | 1535 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
6a2ffcdd | 1536 | goto out_unlock; |
439d473b ACM |
1537 | } |
1538 | ||
6a2ffcdd ACM |
1539 | map = NULL; |
1540 | ||
1541 | out_unlock: | |
1542 | pthread_rwlock_unlock(&maps->lock); | |
1543 | return map; | |
439d473b ACM |
1544 | } |
1545 | ||
aeafcbaf | 1546 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
5230fb7d ACM |
1547 | const char *vmlinux, bool vmlinux_allocated, |
1548 | symbol_filter_t filter) | |
a2928c42 | 1549 | { |
b68e2f91 CS |
1550 | int err = -1; |
1551 | struct symsrc ss; | |
ec5761ea | 1552 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1553 | enum dso_binary_type symtab_type; |
a2928c42 | 1554 | |
5698d2c9 NK |
1555 | if (vmlinux[0] == '/') |
1556 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1557 | else | |
972f393b | 1558 | symbol__join_symfs(symfs_vmlinux, vmlinux); |
a2928c42 | 1559 | |
21ea4539 | 1560 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1561 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1562 | else |
005f9294 | 1563 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1564 | |
005f9294 | 1565 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1566 | return -1; |
1567 | ||
261360b6 | 1568 | err = dso__load_sym(dso, map, &ss, &ss, filter, 0); |
b68e2f91 | 1569 | symsrc__destroy(&ss); |
a2928c42 | 1570 | |
515850e4 | 1571 | if (err > 0) { |
39b12f78 | 1572 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
5f70619d | 1573 | dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
39b12f78 | 1574 | else |
5f70619d | 1575 | dso->binary_type = DSO_BINARY_TYPE__VMLINUX; |
bf4414ae | 1576 | dso__set_long_name(dso, vmlinux, vmlinux_allocated); |
515850e4 | 1577 | dso__set_loaded(dso, map->type); |
ec5761ea | 1578 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1579 | } |
3846df2e | 1580 | |
a2928c42 ACM |
1581 | return err; |
1582 | } | |
1583 | ||
aeafcbaf | 1584 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 1585 | symbol_filter_t filter) |
a19afe46 ACM |
1586 | { |
1587 | int i, err = 0; | |
00dc8657 | 1588 | char *filename = NULL; |
a19afe46 | 1589 | |
dc38218e ACM |
1590 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", |
1591 | vmlinux_path__nr_entries + 1); | |
1592 | ||
1593 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
1594 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], false, filter); | |
1595 | if (err > 0) | |
1596 | goto out; | |
1597 | } | |
1598 | ||
00dc8657 NK |
1599 | if (!symbol_conf.ignore_vmlinux_buildid) |
1600 | filename = dso__build_id_filename(dso, NULL, 0); | |
5ad90e4e | 1601 | if (filename != NULL) { |
5230fb7d ACM |
1602 | err = dso__load_vmlinux(dso, map, filename, true, filter); |
1603 | if (err > 0) | |
5ad90e4e | 1604 | goto out; |
5ad90e4e ACM |
1605 | free(filename); |
1606 | } | |
5ad90e4e | 1607 | out: |
a19afe46 ACM |
1608 | return err; |
1609 | } | |
1610 | ||
c48903b8 MH |
1611 | static bool visible_dir_filter(const char *name, struct dirent *d) |
1612 | { | |
1613 | if (d->d_type != DT_DIR) | |
1614 | return false; | |
1615 | return lsdir_no_dot_filter(name, d); | |
1616 | } | |
1617 | ||
0544d422 AH |
1618 | static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz) |
1619 | { | |
1620 | char kallsyms_filename[PATH_MAX]; | |
0544d422 | 1621 | int ret = -1; |
c48903b8 MH |
1622 | struct strlist *dirs; |
1623 | struct str_node *nd; | |
0544d422 | 1624 | |
c48903b8 MH |
1625 | dirs = lsdir(dir, visible_dir_filter); |
1626 | if (!dirs) | |
0544d422 AH |
1627 | return -1; |
1628 | ||
c48903b8 | 1629 | strlist__for_each(nd, dirs) { |
0544d422 | 1630 | scnprintf(kallsyms_filename, sizeof(kallsyms_filename), |
c48903b8 | 1631 | "%s/%s/kallsyms", dir, nd->s); |
a00d28cb | 1632 | if (!validate_kcore_addresses(kallsyms_filename, map)) { |
0544d422 AH |
1633 | strlcpy(dir, kallsyms_filename, dir_sz); |
1634 | ret = 0; | |
1635 | break; | |
1636 | } | |
1637 | } | |
1638 | ||
c48903b8 | 1639 | strlist__delete(dirs); |
0544d422 AH |
1640 | |
1641 | return ret; | |
1642 | } | |
1643 | ||
1644 | static char *dso__find_kallsyms(struct dso *dso, struct map *map) | |
1645 | { | |
1646 | u8 host_build_id[BUILD_ID_SIZE]; | |
b5d8bbe8 | 1647 | char sbuild_id[SBUILD_ID_SIZE]; |
0544d422 AH |
1648 | bool is_host = false; |
1649 | char path[PATH_MAX]; | |
1650 | ||
1651 | if (!dso->has_build_id) { | |
1652 | /* | |
1653 | * Last resort, if we don't have a build-id and couldn't find | |
1654 | * any vmlinux file, try the running kernel kallsyms table. | |
1655 | */ | |
1656 | goto proc_kallsyms; | |
1657 | } | |
1658 | ||
1659 | if (sysfs__read_build_id("/sys/kernel/notes", host_build_id, | |
1660 | sizeof(host_build_id)) == 0) | |
1661 | is_host = dso__build_id_equal(dso, host_build_id); | |
1662 | ||
1663 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
1664 | ||
0a77582f MH |
1665 | scnprintf(path, sizeof(path), "%s/%s/%s", buildid_dir, |
1666 | DSO__NAME_KCORE, sbuild_id); | |
449867e3 | 1667 | |
0544d422 AH |
1668 | /* Use /proc/kallsyms if possible */ |
1669 | if (is_host) { | |
1670 | DIR *d; | |
1671 | int fd; | |
1672 | ||
1673 | /* If no cached kcore go with /proc/kallsyms */ | |
0544d422 AH |
1674 | d = opendir(path); |
1675 | if (!d) | |
1676 | goto proc_kallsyms; | |
1677 | closedir(d); | |
1678 | ||
1679 | /* | |
1680 | * Do not check the build-id cache, until we know we cannot use | |
1681 | * /proc/kcore. | |
1682 | */ | |
1683 | fd = open("/proc/kcore", O_RDONLY); | |
1684 | if (fd != -1) { | |
1685 | close(fd); | |
1686 | /* If module maps match go with /proc/kallsyms */ | |
a00d28cb | 1687 | if (!validate_kcore_addresses("/proc/kallsyms", map)) |
0544d422 AH |
1688 | goto proc_kallsyms; |
1689 | } | |
1690 | ||
1691 | /* Find kallsyms in build-id cache with kcore */ | |
1692 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1693 | return strdup(path); | |
1694 | ||
1695 | goto proc_kallsyms; | |
1696 | } | |
1697 | ||
449867e3 AH |
1698 | /* Find kallsyms in build-id cache with kcore */ |
1699 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1700 | return strdup(path); | |
1701 | ||
0a77582f MH |
1702 | scnprintf(path, sizeof(path), "%s/%s/%s", |
1703 | buildid_dir, DSO__NAME_KALLSYMS, sbuild_id); | |
0544d422 AH |
1704 | |
1705 | if (access(path, F_OK)) { | |
1706 | pr_err("No kallsyms or vmlinux with build-id %s was found\n", | |
1707 | sbuild_id); | |
1708 | return NULL; | |
1709 | } | |
1710 | ||
1711 | return strdup(path); | |
1712 | ||
1713 | proc_kallsyms: | |
1714 | return strdup("/proc/kallsyms"); | |
1715 | } | |
1716 | ||
aeafcbaf | 1717 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 1718 | symbol_filter_t filter) |
a827c875 | 1719 | { |
cc612d81 | 1720 | int err; |
9e201442 ACM |
1721 | const char *kallsyms_filename = NULL; |
1722 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1723 | /* |
b226a5a7 DA |
1724 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1725 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1726 | * |
1727 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1728 | * build-id, or if the user specifies the wrong path to the right | |
1729 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1730 | * x86_86 one, on the machine where analysis is being performed, say), | |
1731 | * or worse, /proc/kallsyms. | |
1732 | * | |
1733 | * If the specified file _has_ a build-id and there is a build-id | |
1734 | * section in the perf.data file, we will still do the expected | |
1735 | * validation in dso__load_vmlinux and will bail out if they don't | |
1736 | * match. | |
1737 | */ | |
b226a5a7 DA |
1738 | if (symbol_conf.kallsyms_name != NULL) { |
1739 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1740 | goto do_kallsyms; | |
1741 | } | |
1742 | ||
fc2be696 | 1743 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
5230fb7d ACM |
1744 | return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, |
1745 | false, filter); | |
dc8d6ab2 | 1746 | } |
cc612d81 | 1747 | |
fc2be696 | 1748 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
aeafcbaf | 1749 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 | 1750 | if (err > 0) |
39b12f78 | 1751 | return err; |
cc612d81 ACM |
1752 | } |
1753 | ||
ec5761ea DA |
1754 | /* do not try local files if a symfs was given */ |
1755 | if (symbol_conf.symfs[0] != 0) | |
1756 | return -1; | |
1757 | ||
0544d422 AH |
1758 | kallsyms_allocated_filename = dso__find_kallsyms(dso, map); |
1759 | if (!kallsyms_allocated_filename) | |
1760 | return -1; | |
19fc2ded | 1761 | |
0544d422 | 1762 | kallsyms_filename = kallsyms_allocated_filename; |
439d473b | 1763 | |
cc612d81 | 1764 | do_kallsyms: |
aeafcbaf | 1765 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
1766 | if (err > 0) |
1767 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1768 | free(kallsyms_allocated_filename); |
439d473b | 1769 | |
8e0cf965 | 1770 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1771 | dso->binary_type = DSO_BINARY_TYPE__KALLSYMS; |
0a77582f | 1772 | dso__set_long_name(dso, DSO__NAME_KALLSYMS, false); |
6a4694a4 ACM |
1773 | map__fixup_start(map); |
1774 | map__fixup_end(map); | |
439d473b | 1775 | } |
94cb9e38 | 1776 | |
a827c875 ACM |
1777 | return err; |
1778 | } | |
1779 | ||
aeafcbaf ACM |
1780 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
1781 | symbol_filter_t filter) | |
a1645ce1 ZY |
1782 | { |
1783 | int err; | |
1784 | const char *kallsyms_filename = NULL; | |
23346f21 | 1785 | struct machine *machine; |
a1645ce1 ZY |
1786 | char path[PATH_MAX]; |
1787 | ||
1788 | if (!map->groups) { | |
1789 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1790 | return -1; | |
1791 | } | |
23346f21 | 1792 | machine = map->groups->machine; |
a1645ce1 | 1793 | |
23346f21 | 1794 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1795 | /* |
1796 | * if the user specified a vmlinux filename, use it and only | |
1797 | * it, reporting errors to the user if it cannot be used. | |
1798 | * Or use file guest_kallsyms inputted by user on commandline | |
1799 | */ | |
1800 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1801 | err = dso__load_vmlinux(dso, map, |
5230fb7d ACM |
1802 | symbol_conf.default_guest_vmlinux_name, |
1803 | false, filter); | |
39b12f78 | 1804 | return err; |
a1645ce1 ZY |
1805 | } |
1806 | ||
1807 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1808 | if (!kallsyms_filename) | |
1809 | return -1; | |
1810 | } else { | |
23346f21 | 1811 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1812 | kallsyms_filename = path; |
1813 | } | |
1814 | ||
aeafcbaf | 1815 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
8e0cf965 | 1816 | if (err > 0) |
39b12f78 | 1817 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 1818 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1819 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
39b12f78 | 1820 | machine__mmap_name(machine, path, sizeof(path)); |
7e155d4d | 1821 | dso__set_long_name(dso, strdup(path), true); |
a1645ce1 ZY |
1822 | map__fixup_start(map); |
1823 | map__fixup_end(map); | |
1824 | } | |
1825 | ||
1826 | return err; | |
1827 | } | |
cd84c2ac | 1828 | |
cc612d81 ACM |
1829 | static void vmlinux_path__exit(void) |
1830 | { | |
04662523 ACM |
1831 | while (--vmlinux_path__nr_entries >= 0) |
1832 | zfree(&vmlinux_path[vmlinux_path__nr_entries]); | |
c4f03547 | 1833 | vmlinux_path__nr_entries = 0; |
cc612d81 | 1834 | |
04662523 | 1835 | zfree(&vmlinux_path); |
cc612d81 ACM |
1836 | } |
1837 | ||
aac48647 ET |
1838 | static const char * const vmlinux_paths[] = { |
1839 | "vmlinux", | |
1840 | "/boot/vmlinux" | |
1841 | }; | |
1842 | ||
1843 | static const char * const vmlinux_paths_upd[] = { | |
1844 | "/boot/vmlinux-%s", | |
1845 | "/usr/lib/debug/boot/vmlinux-%s", | |
1846 | "/lib/modules/%s/build/vmlinux", | |
f55ae954 ET |
1847 | "/usr/lib/debug/lib/modules/%s/vmlinux", |
1848 | "/usr/lib/debug/boot/vmlinux-%s.debug" | |
aac48647 ET |
1849 | }; |
1850 | ||
1851 | static int vmlinux_path__add(const char *new_entry) | |
1852 | { | |
1853 | vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry); | |
1854 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1855 | return -1; | |
1856 | ++vmlinux_path__nr_entries; | |
1857 | ||
1858 | return 0; | |
1859 | } | |
1860 | ||
ce80d3be | 1861 | static int vmlinux_path__init(struct perf_env *env) |
cc612d81 ACM |
1862 | { |
1863 | struct utsname uts; | |
1864 | char bf[PATH_MAX]; | |
0a7e6d1b | 1865 | char *kernel_version; |
aac48647 | 1866 | unsigned int i; |
cc612d81 | 1867 | |
aac48647 ET |
1868 | vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) + |
1869 | ARRAY_SIZE(vmlinux_paths_upd))); | |
cc612d81 ACM |
1870 | if (vmlinux_path == NULL) |
1871 | return -1; | |
1872 | ||
aac48647 ET |
1873 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++) |
1874 | if (vmlinux_path__add(vmlinux_paths[i]) < 0) | |
1875 | goto out_fail; | |
ec5761ea | 1876 | |
0a7e6d1b | 1877 | /* only try kernel version if no symfs was given */ |
ec5761ea DA |
1878 | if (symbol_conf.symfs[0] != 0) |
1879 | return 0; | |
1880 | ||
0a7e6d1b NK |
1881 | if (env) { |
1882 | kernel_version = env->os_release; | |
1883 | } else { | |
1884 | if (uname(&uts) < 0) | |
1885 | goto out_fail; | |
1886 | ||
1887 | kernel_version = uts.release; | |
1888 | } | |
ec5761ea | 1889 | |
aac48647 ET |
1890 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) { |
1891 | snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version); | |
1892 | if (vmlinux_path__add(bf) < 0) | |
1893 | goto out_fail; | |
1894 | } | |
cc612d81 ACM |
1895 | |
1896 | return 0; | |
1897 | ||
1898 | out_fail: | |
1899 | vmlinux_path__exit(); | |
1900 | return -1; | |
1901 | } | |
1902 | ||
3bfe5f81 | 1903 | int setup_list(struct strlist **list, const char *list_str, |
655000e7 ACM |
1904 | const char *list_name) |
1905 | { | |
1906 | if (list_str == NULL) | |
1907 | return 0; | |
1908 | ||
4a77e218 | 1909 | *list = strlist__new(list_str, NULL); |
655000e7 ACM |
1910 | if (!*list) { |
1911 | pr_err("problems parsing %s list\n", list_name); | |
1912 | return -1; | |
1913 | } | |
0bc2f2f7 ACM |
1914 | |
1915 | symbol_conf.has_filter = true; | |
655000e7 ACM |
1916 | return 0; |
1917 | } | |
1918 | ||
e03eaa40 DA |
1919 | int setup_intlist(struct intlist **list, const char *list_str, |
1920 | const char *list_name) | |
1921 | { | |
1922 | if (list_str == NULL) | |
1923 | return 0; | |
1924 | ||
1925 | *list = intlist__new(list_str); | |
1926 | if (!*list) { | |
1927 | pr_err("problems parsing %s list\n", list_name); | |
1928 | return -1; | |
1929 | } | |
1930 | return 0; | |
1931 | } | |
1932 | ||
ec80fde7 ACM |
1933 | static bool symbol__read_kptr_restrict(void) |
1934 | { | |
1935 | bool value = false; | |
1936 | ||
1937 | if (geteuid() != 0) { | |
1938 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
1939 | if (fp != NULL) { | |
1940 | char line[8]; | |
1941 | ||
1942 | if (fgets(line, sizeof(line), fp) != NULL) | |
1943 | value = atoi(line) != 0; | |
1944 | ||
1945 | fclose(fp); | |
1946 | } | |
1947 | } | |
1948 | ||
1949 | return value; | |
1950 | } | |
1951 | ||
ce80d3be | 1952 | int symbol__init(struct perf_env *env) |
2446042c | 1953 | { |
ec5761ea DA |
1954 | const char *symfs; |
1955 | ||
85e00b55 JZ |
1956 | if (symbol_conf.initialized) |
1957 | return 0; | |
1958 | ||
9ac3e487 | 1959 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 1960 | |
166ccc9c NK |
1961 | symbol__elf_init(); |
1962 | ||
75be6cf4 ACM |
1963 | if (symbol_conf.sort_by_name) |
1964 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
1965 | sizeof(struct symbol)); | |
b32d133a | 1966 | |
0a7e6d1b | 1967 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0) |
2446042c ACM |
1968 | return -1; |
1969 | ||
c410a338 ACM |
1970 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
1971 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
1972 | return -1; | |
1973 | } | |
1974 | ||
655000e7 ACM |
1975 | if (setup_list(&symbol_conf.dso_list, |
1976 | symbol_conf.dso_list_str, "dso") < 0) | |
1977 | return -1; | |
1978 | ||
1979 | if (setup_list(&symbol_conf.comm_list, | |
1980 | symbol_conf.comm_list_str, "comm") < 0) | |
1981 | goto out_free_dso_list; | |
1982 | ||
e03eaa40 DA |
1983 | if (setup_intlist(&symbol_conf.pid_list, |
1984 | symbol_conf.pid_list_str, "pid") < 0) | |
1985 | goto out_free_comm_list; | |
1986 | ||
1987 | if (setup_intlist(&symbol_conf.tid_list, | |
1988 | symbol_conf.tid_list_str, "tid") < 0) | |
1989 | goto out_free_pid_list; | |
1990 | ||
655000e7 ACM |
1991 | if (setup_list(&symbol_conf.sym_list, |
1992 | symbol_conf.sym_list_str, "symbol") < 0) | |
e03eaa40 | 1993 | goto out_free_tid_list; |
655000e7 | 1994 | |
ec5761ea DA |
1995 | /* |
1996 | * A path to symbols of "/" is identical to "" | |
1997 | * reset here for simplicity. | |
1998 | */ | |
1999 | symfs = realpath(symbol_conf.symfs, NULL); | |
2000 | if (symfs == NULL) | |
2001 | symfs = symbol_conf.symfs; | |
2002 | if (strcmp(symfs, "/") == 0) | |
2003 | symbol_conf.symfs = ""; | |
2004 | if (symfs != symbol_conf.symfs) | |
2005 | free((void *)symfs); | |
2006 | ||
ec80fde7 ACM |
2007 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2008 | ||
85e00b55 | 2009 | symbol_conf.initialized = true; |
4aa65636 | 2010 | return 0; |
655000e7 | 2011 | |
e03eaa40 DA |
2012 | out_free_tid_list: |
2013 | intlist__delete(symbol_conf.tid_list); | |
2014 | out_free_pid_list: | |
2015 | intlist__delete(symbol_conf.pid_list); | |
655000e7 ACM |
2016 | out_free_comm_list: |
2017 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
2018 | out_free_dso_list: |
2019 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 2020 | return -1; |
4aa65636 ACM |
2021 | } |
2022 | ||
d65a458b ACM |
2023 | void symbol__exit(void) |
2024 | { | |
85e00b55 JZ |
2025 | if (!symbol_conf.initialized) |
2026 | return; | |
d65a458b ACM |
2027 | strlist__delete(symbol_conf.sym_list); |
2028 | strlist__delete(symbol_conf.dso_list); | |
2029 | strlist__delete(symbol_conf.comm_list); | |
e03eaa40 DA |
2030 | intlist__delete(symbol_conf.tid_list); |
2031 | intlist__delete(symbol_conf.pid_list); | |
d65a458b ACM |
2032 | vmlinux_path__exit(); |
2033 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 2034 | symbol_conf.initialized = false; |
d65a458b | 2035 | } |
a7066709 HK |
2036 | |
2037 | int symbol__config_symfs(const struct option *opt __maybe_unused, | |
2038 | const char *dir, int unset __maybe_unused) | |
2039 | { | |
2040 | char *bf = NULL; | |
2041 | int ret; | |
2042 | ||
2043 | symbol_conf.symfs = strdup(dir); | |
2044 | if (symbol_conf.symfs == NULL) | |
2045 | return -ENOMEM; | |
2046 | ||
2047 | /* skip the locally configured cache if a symfs is given, and | |
2048 | * config buildid dir to symfs/.debug | |
2049 | */ | |
2050 | ret = asprintf(&bf, "%s/%s", dir, ".debug"); | |
2051 | if (ret < 0) | |
2052 | return -ENOMEM; | |
2053 | ||
2054 | set_buildid_dir(bf); | |
2055 | ||
2056 | free(bf); | |
2057 | return 0; | |
2058 | } |