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" |
a2928c42 | 18 | |
a2928c42 | 19 | #include <elf.h> |
f1617b40 | 20 | #include <limits.h> |
c506c96b | 21 | #include <symbol/kallsyms.h> |
439d473b | 22 | #include <sys/utsname.h> |
2cdbc46d | 23 | |
aeafcbaf | 24 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 25 | symbol_filter_t filter); |
aeafcbaf | 26 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
a1645ce1 | 27 | symbol_filter_t filter); |
3f067dca ACM |
28 | int vmlinux_path__nr_entries; |
29 | char **vmlinux_path; | |
439d473b | 30 | |
75be6cf4 | 31 | struct symbol_conf symbol_conf = { |
b32d133a ACM |
32 | .use_modules = true, |
33 | .try_vmlinux_path = true, | |
3e6a2a7f | 34 | .annotate_src = true, |
328ccdac | 35 | .demangle = true, |
ec5761ea | 36 | .symfs = "", |
b32d133a ACM |
37 | }; |
38 | ||
44f24cb3 JO |
39 | static enum dso_binary_type binary_type_symtab[] = { |
40 | DSO_BINARY_TYPE__KALLSYMS, | |
41 | DSO_BINARY_TYPE__GUEST_KALLSYMS, | |
42 | DSO_BINARY_TYPE__JAVA_JIT, | |
43 | DSO_BINARY_TYPE__DEBUGLINK, | |
44 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
45 | DSO_BINARY_TYPE__FEDORA_DEBUGINFO, | |
46 | DSO_BINARY_TYPE__UBUNTU_DEBUGINFO, | |
47 | DSO_BINARY_TYPE__BUILDID_DEBUGINFO, | |
48 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
49 | DSO_BINARY_TYPE__GUEST_KMODULE, | |
50 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE, | |
9cd00941 | 51 | DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO, |
44f24cb3 JO |
52 | DSO_BINARY_TYPE__NOT_FOUND, |
53 | }; | |
54 | ||
028df767 | 55 | #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab) |
44f24cb3 | 56 | |
36a3e646 | 57 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee | 58 | { |
31877908 AB |
59 | symbol_type = toupper(symbol_type); |
60 | ||
6893d4ee ACM |
61 | switch (map_type) { |
62 | case MAP__FUNCTION: | |
63 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 | 64 | case MAP__VARIABLE: |
31877908 | 65 | return symbol_type == 'D'; |
6893d4ee ACM |
66 | default: |
67 | return false; | |
68 | } | |
69 | } | |
70 | ||
694bf407 AB |
71 | static int prefix_underscores_count(const char *str) |
72 | { | |
73 | const char *tail = str; | |
74 | ||
75 | while (*tail == '_') | |
76 | tail++; | |
77 | ||
78 | return tail - str; | |
79 | } | |
80 | ||
81 | #define SYMBOL_A 0 | |
82 | #define SYMBOL_B 1 | |
83 | ||
84 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
85 | { | |
86 | s64 a; | |
87 | s64 b; | |
3445432b | 88 | size_t na, nb; |
694bf407 AB |
89 | |
90 | /* Prefer a symbol with non zero length */ | |
91 | a = syma->end - syma->start; | |
92 | b = symb->end - symb->start; | |
93 | if ((b == 0) && (a > 0)) | |
94 | return SYMBOL_A; | |
95 | else if ((a == 0) && (b > 0)) | |
96 | return SYMBOL_B; | |
97 | ||
98 | /* Prefer a non weak symbol over a weak one */ | |
99 | a = syma->binding == STB_WEAK; | |
100 | b = symb->binding == STB_WEAK; | |
101 | if (b && !a) | |
102 | return SYMBOL_A; | |
103 | if (a && !b) | |
104 | return SYMBOL_B; | |
105 | ||
106 | /* Prefer a global symbol over a non global one */ | |
107 | a = syma->binding == STB_GLOBAL; | |
108 | b = symb->binding == STB_GLOBAL; | |
109 | if (a && !b) | |
110 | return SYMBOL_A; | |
111 | if (b && !a) | |
112 | return SYMBOL_B; | |
113 | ||
114 | /* Prefer a symbol with less underscores */ | |
115 | a = prefix_underscores_count(syma->name); | |
116 | b = prefix_underscores_count(symb->name); | |
117 | if (b > a) | |
118 | return SYMBOL_A; | |
119 | else if (a > b) | |
120 | return SYMBOL_B; | |
121 | ||
3445432b AH |
122 | /* Choose the symbol with the longest name */ |
123 | na = strlen(syma->name); | |
124 | nb = strlen(symb->name); | |
125 | if (na > nb) | |
694bf407 | 126 | return SYMBOL_A; |
3445432b | 127 | else if (na < nb) |
694bf407 | 128 | return SYMBOL_B; |
3445432b AH |
129 | |
130 | /* Avoid "SyS" kernel syscall aliases */ | |
131 | if (na >= 3 && !strncmp(syma->name, "SyS", 3)) | |
132 | return SYMBOL_B; | |
133 | if (na >= 10 && !strncmp(syma->name, "compat_SyS", 10)) | |
134 | return SYMBOL_B; | |
135 | ||
136 | return SYMBOL_A; | |
694bf407 AB |
137 | } |
138 | ||
e5a1845f | 139 | void symbols__fixup_duplicate(struct rb_root *symbols) |
694bf407 AB |
140 | { |
141 | struct rb_node *nd; | |
142 | struct symbol *curr, *next; | |
143 | ||
144 | nd = rb_first(symbols); | |
145 | ||
146 | while (nd) { | |
147 | curr = rb_entry(nd, struct symbol, rb_node); | |
148 | again: | |
149 | nd = rb_next(&curr->rb_node); | |
150 | next = rb_entry(nd, struct symbol, rb_node); | |
151 | ||
152 | if (!nd) | |
153 | break; | |
154 | ||
155 | if (curr->start != next->start) | |
156 | continue; | |
157 | ||
158 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
159 | rb_erase(&next->rb_node, symbols); | |
d4f74eb8 | 160 | symbol__delete(next); |
694bf407 AB |
161 | goto again; |
162 | } else { | |
163 | nd = rb_next(&curr->rb_node); | |
164 | rb_erase(&curr->rb_node, symbols); | |
d4f74eb8 | 165 | symbol__delete(curr); |
694bf407 AB |
166 | } |
167 | } | |
168 | } | |
169 | ||
e5a1845f | 170 | void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 171 | { |
aeafcbaf | 172 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 173 | struct symbol *curr, *prev; |
af427bf5 ACM |
174 | |
175 | if (prevnd == NULL) | |
176 | return; | |
177 | ||
2e538c4a ACM |
178 | curr = rb_entry(prevnd, struct symbol, rb_node); |
179 | ||
af427bf5 | 180 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
181 | prev = curr; |
182 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 183 | |
3b01a413 | 184 | if (prev->end == prev->start && prev->end != curr->start) |
af427bf5 | 185 | prev->end = curr->start - 1; |
af427bf5 | 186 | } |
2e538c4a ACM |
187 | |
188 | /* Last entry */ | |
189 | if (curr->end == curr->start) | |
190 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
191 | } |
192 | ||
e5a1845f | 193 | void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 ACM |
194 | { |
195 | struct map *prev, *curr; | |
aeafcbaf | 196 | struct rb_node *nd, *prevnd = rb_first(&mg->maps[type]); |
af427bf5 ACM |
197 | |
198 | if (prevnd == NULL) | |
199 | return; | |
200 | ||
201 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
202 | |
203 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
204 | prev = curr; | |
205 | curr = rb_entry(nd, struct map, rb_node); | |
206 | prev->end = curr->start - 1; | |
2e538c4a | 207 | } |
90c83218 ACM |
208 | |
209 | /* | |
210 | * We still haven't the actual symbols, so guess the | |
211 | * last map final address. | |
212 | */ | |
9d1faba5 | 213 | curr->end = ~0ULL; |
af427bf5 ACM |
214 | } |
215 | ||
e5a1845f | 216 | struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name) |
a2928c42 | 217 | { |
0085c954 | 218 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
219 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
220 | sizeof(*sym) + namelen)); | |
221 | if (sym == NULL) | |
0b73da3f IM |
222 | return NULL; |
223 | ||
75be6cf4 | 224 | if (symbol_conf.priv_size) |
aeafcbaf | 225 | sym = ((void *)sym) + symbol_conf.priv_size; |
e4204992 | 226 | |
aeafcbaf ACM |
227 | sym->start = start; |
228 | sym->end = len ? start + len - 1 : start; | |
229 | sym->binding = binding; | |
230 | sym->namelen = namelen - 1; | |
e4204992 | 231 | |
aeafcbaf ACM |
232 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
233 | __func__, name, start, sym->end); | |
234 | memcpy(sym->name, name, namelen); | |
a2928c42 | 235 | |
aeafcbaf | 236 | return sym; |
a2928c42 ACM |
237 | } |
238 | ||
aeafcbaf | 239 | void symbol__delete(struct symbol *sym) |
a2928c42 | 240 | { |
aeafcbaf | 241 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
242 | } |
243 | ||
cdd059d7 | 244 | size_t symbol__fprintf(struct symbol *sym, FILE *fp) |
a2928c42 | 245 | { |
9486aa38 | 246 | return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n", |
aeafcbaf ACM |
247 | sym->start, sym->end, |
248 | sym->binding == STB_GLOBAL ? 'g' : | |
249 | sym->binding == STB_LOCAL ? 'l' : 'w', | |
250 | sym->name); | |
a2928c42 ACM |
251 | } |
252 | ||
a978f2ab AN |
253 | size_t symbol__fprintf_symname_offs(const struct symbol *sym, |
254 | const struct addr_location *al, FILE *fp) | |
547a92e0 | 255 | { |
a978f2ab AN |
256 | unsigned long offset; |
257 | size_t length; | |
258 | ||
259 | if (sym && sym->name) { | |
260 | length = fprintf(fp, "%s", sym->name); | |
261 | if (al) { | |
0b8c25d9 DA |
262 | if (al->addr < sym->end) |
263 | offset = al->addr - sym->start; | |
264 | else | |
265 | offset = al->addr - al->map->start - sym->start; | |
a978f2ab AN |
266 | length += fprintf(fp, "+0x%lx", offset); |
267 | } | |
268 | return length; | |
269 | } else | |
270 | return fprintf(fp, "[unknown]"); | |
271 | } | |
547a92e0 | 272 | |
a978f2ab AN |
273 | size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp) |
274 | { | |
275 | return symbol__fprintf_symname_offs(sym, NULL, fp); | |
547a92e0 AN |
276 | } |
277 | ||
cdd059d7 | 278 | void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
279 | { |
280 | struct symbol *pos; | |
aeafcbaf | 281 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
282 | |
283 | while (next) { | |
284 | pos = rb_entry(next, struct symbol, rb_node); | |
285 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 286 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 287 | symbol__delete(pos); |
a2928c42 ACM |
288 | } |
289 | } | |
290 | ||
e5a1845f | 291 | void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
a2928c42 | 292 | { |
aeafcbaf | 293 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 294 | struct rb_node *parent = NULL; |
9cffa8d5 | 295 | const u64 ip = sym->start; |
a2928c42 ACM |
296 | struct symbol *s; |
297 | ||
298 | while (*p != NULL) { | |
299 | parent = *p; | |
300 | s = rb_entry(parent, struct symbol, rb_node); | |
301 | if (ip < s->start) | |
302 | p = &(*p)->rb_left; | |
303 | else | |
304 | p = &(*p)->rb_right; | |
305 | } | |
306 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 307 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
308 | } |
309 | ||
aeafcbaf | 310 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
311 | { |
312 | struct rb_node *n; | |
313 | ||
aeafcbaf | 314 | if (symbols == NULL) |
a2928c42 ACM |
315 | return NULL; |
316 | ||
aeafcbaf | 317 | n = symbols->rb_node; |
a2928c42 ACM |
318 | |
319 | while (n) { | |
320 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
321 | ||
322 | if (ip < s->start) | |
323 | n = n->rb_left; | |
324 | else if (ip > s->end) | |
325 | n = n->rb_right; | |
326 | else | |
327 | return s; | |
328 | } | |
329 | ||
330 | return NULL; | |
331 | } | |
332 | ||
8e0cf965 AH |
333 | static struct symbol *symbols__first(struct rb_root *symbols) |
334 | { | |
335 | struct rb_node *n = rb_first(symbols); | |
336 | ||
337 | if (n) | |
338 | return rb_entry(n, struct symbol, rb_node); | |
339 | ||
340 | return NULL; | |
341 | } | |
342 | ||
79406cd7 ACM |
343 | struct symbol_name_rb_node { |
344 | struct rb_node rb_node; | |
345 | struct symbol sym; | |
346 | }; | |
347 | ||
aeafcbaf | 348 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 349 | { |
aeafcbaf | 350 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 351 | struct rb_node *parent = NULL; |
02a9d037 RV |
352 | struct symbol_name_rb_node *symn, *s; |
353 | ||
354 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
355 | |
356 | while (*p != NULL) { | |
357 | parent = *p; | |
358 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
359 | if (strcmp(sym->name, s->sym.name) < 0) | |
360 | p = &(*p)->rb_left; | |
361 | else | |
362 | p = &(*p)->rb_right; | |
363 | } | |
364 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 365 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
366 | } |
367 | ||
aeafcbaf ACM |
368 | static void symbols__sort_by_name(struct rb_root *symbols, |
369 | struct rb_root *source) | |
79406cd7 ACM |
370 | { |
371 | struct rb_node *nd; | |
372 | ||
373 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
374 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 375 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
376 | } |
377 | } | |
378 | ||
aeafcbaf ACM |
379 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
380 | const char *name) | |
79406cd7 ACM |
381 | { |
382 | struct rb_node *n; | |
383 | ||
aeafcbaf | 384 | if (symbols == NULL) |
79406cd7 ACM |
385 | return NULL; |
386 | ||
aeafcbaf | 387 | n = symbols->rb_node; |
79406cd7 ACM |
388 | |
389 | while (n) { | |
390 | struct symbol_name_rb_node *s; | |
391 | int cmp; | |
392 | ||
393 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
394 | cmp = strcmp(name, s->sym.name); | |
395 | ||
396 | if (cmp < 0) | |
397 | n = n->rb_left; | |
398 | else if (cmp > 0) | |
399 | n = n->rb_right; | |
400 | else | |
401 | return &s->sym; | |
402 | } | |
403 | ||
404 | return NULL; | |
405 | } | |
406 | ||
aeafcbaf | 407 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 408 | enum map_type type, u64 addr) |
fcf1203a | 409 | { |
aeafcbaf | 410 | return symbols__find(&dso->symbols[type], addr); |
fcf1203a ACM |
411 | } |
412 | ||
8e0cf965 AH |
413 | struct symbol *dso__first_symbol(struct dso *dso, enum map_type type) |
414 | { | |
415 | return symbols__first(&dso->symbols[type]); | |
416 | } | |
417 | ||
aeafcbaf | 418 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
419 | const char *name) |
420 | { | |
aeafcbaf | 421 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
422 | } |
423 | ||
aeafcbaf | 424 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 425 | { |
aeafcbaf ACM |
426 | dso__set_sorted_by_name(dso, type); |
427 | return symbols__sort_by_name(&dso->symbol_names[type], | |
428 | &dso->symbols[type]); | |
79406cd7 ACM |
429 | } |
430 | ||
aeafcbaf ACM |
431 | size_t dso__fprintf_symbols_by_name(struct dso *dso, |
432 | enum map_type type, FILE *fp) | |
90f18e63 SD |
433 | { |
434 | size_t ret = 0; | |
435 | struct rb_node *nd; | |
436 | struct symbol_name_rb_node *pos; | |
437 | ||
aeafcbaf | 438 | for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { |
90f18e63 SD |
439 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); |
440 | fprintf(fp, "%s\n", pos->sym.name); | |
441 | } | |
442 | ||
443 | return ret; | |
444 | } | |
445 | ||
316d70d6 AH |
446 | int modules__parse(const char *filename, void *arg, |
447 | int (*process_module)(void *arg, const char *name, | |
448 | u64 start)) | |
449 | { | |
450 | char *line = NULL; | |
451 | size_t n; | |
452 | FILE *file; | |
453 | int err = 0; | |
454 | ||
455 | file = fopen(filename, "r"); | |
456 | if (file == NULL) | |
457 | return -1; | |
458 | ||
459 | while (1) { | |
460 | char name[PATH_MAX]; | |
461 | u64 start; | |
462 | char *sep; | |
463 | ssize_t line_len; | |
464 | ||
465 | line_len = getline(&line, &n, file); | |
466 | if (line_len < 0) { | |
467 | if (feof(file)) | |
468 | break; | |
469 | err = -1; | |
470 | goto out; | |
471 | } | |
472 | ||
473 | if (!line) { | |
474 | err = -1; | |
475 | goto out; | |
476 | } | |
477 | ||
478 | line[--line_len] = '\0'; /* \n */ | |
479 | ||
480 | sep = strrchr(line, 'x'); | |
481 | if (sep == NULL) | |
482 | continue; | |
483 | ||
484 | hex2u64(sep + 1, &start); | |
485 | ||
486 | sep = strchr(line, ' '); | |
487 | if (sep == NULL) | |
488 | continue; | |
489 | ||
490 | *sep = '\0'; | |
491 | ||
492 | scnprintf(name, sizeof(name), "[%s]", line); | |
493 | ||
494 | err = process_module(arg, name, start); | |
495 | if (err) | |
496 | break; | |
497 | } | |
498 | out: | |
499 | free(line); | |
500 | fclose(file); | |
501 | return err; | |
502 | } | |
503 | ||
682b335a ACM |
504 | struct process_kallsyms_args { |
505 | struct map *map; | |
506 | struct dso *dso; | |
507 | }; | |
508 | ||
82d1deb0 DA |
509 | bool symbol__is_idle(struct symbol *sym) |
510 | { | |
511 | const char * const idle_symbols[] = { | |
512 | "cpu_idle", | |
513 | "intel_idle", | |
514 | "default_idle", | |
515 | "native_safe_halt", | |
516 | "enter_idle", | |
517 | "exit_idle", | |
518 | "mwait_idle", | |
519 | "mwait_idle_with_hints", | |
520 | "poll_idle", | |
521 | "ppc64_runlatch_off", | |
522 | "pseries_dedicated_idle_sleep", | |
523 | NULL | |
524 | }; | |
525 | ||
526 | int i; | |
527 | ||
528 | if (!sym) | |
529 | return false; | |
530 | ||
531 | for (i = 0; idle_symbols[i]; i++) { | |
532 | if (!strcmp(idle_symbols[i], sym->name)) | |
533 | return true; | |
534 | } | |
535 | ||
536 | return false; | |
537 | } | |
538 | ||
682b335a | 539 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 540 | char type, u64 start) |
682b335a ACM |
541 | { |
542 | struct symbol *sym; | |
543 | struct process_kallsyms_args *a = arg; | |
544 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
545 | ||
546 | if (!symbol_type__is_a(type, a->map->type)) | |
547 | return 0; | |
548 | ||
82151520 CS |
549 | /* |
550 | * module symbols are not sorted so we add all | |
551 | * symbols, setting length to 0, and rely on | |
552 | * symbols__fixup_end() to fix it up. | |
553 | */ | |
554 | sym = symbol__new(start, 0, kallsyms2elf_type(type), name); | |
682b335a ACM |
555 | if (sym == NULL) |
556 | return -ENOMEM; | |
557 | /* | |
558 | * We will pass the symbols to the filter later, in | |
559 | * map__split_kallsyms, when we have split the maps per module | |
560 | */ | |
561 | symbols__insert(root, sym); | |
a1645ce1 | 562 | |
682b335a ACM |
563 | return 0; |
564 | } | |
565 | ||
566 | /* | |
567 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
568 | * so that we can in the next step set the symbol ->end address and then | |
569 | * call kernel_maps__split_kallsyms. | |
570 | */ | |
aeafcbaf | 571 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 572 | struct map *map) |
682b335a | 573 | { |
aeafcbaf | 574 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 575 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
576 | } |
577 | ||
8e0cf965 AH |
578 | static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map, |
579 | symbol_filter_t filter) | |
580 | { | |
581 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
582 | struct map *curr_map; | |
583 | struct symbol *pos; | |
584 | int count = 0, moved = 0; | |
585 | struct rb_root *root = &dso->symbols[map->type]; | |
586 | struct rb_node *next = rb_first(root); | |
587 | ||
588 | while (next) { | |
589 | char *module; | |
590 | ||
591 | pos = rb_entry(next, struct symbol, rb_node); | |
592 | next = rb_next(&pos->rb_node); | |
593 | ||
594 | module = strchr(pos->name, '\t'); | |
595 | if (module) | |
596 | *module = '\0'; | |
597 | ||
598 | curr_map = map_groups__find(kmaps, map->type, pos->start); | |
599 | ||
600 | if (!curr_map || (filter && filter(curr_map, pos))) { | |
601 | rb_erase(&pos->rb_node, root); | |
602 | symbol__delete(pos); | |
603 | } else { | |
604 | pos->start -= curr_map->start - curr_map->pgoff; | |
605 | if (pos->end) | |
606 | pos->end -= curr_map->start - curr_map->pgoff; | |
607 | if (curr_map != map) { | |
608 | rb_erase(&pos->rb_node, root); | |
609 | symbols__insert( | |
610 | &curr_map->dso->symbols[curr_map->type], | |
611 | pos); | |
612 | ++moved; | |
613 | } else { | |
614 | ++count; | |
615 | } | |
616 | } | |
617 | } | |
618 | ||
619 | /* Symbols have been adjusted */ | |
620 | dso->adjust_symbols = 1; | |
621 | ||
622 | return count + moved; | |
623 | } | |
624 | ||
2e538c4a ACM |
625 | /* |
626 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
627 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
628 | * the original ELF section names vmlinux have. | |
629 | */ | |
d9b62aba | 630 | static int dso__split_kallsyms(struct dso *dso, struct map *map, u64 delta, |
9de89fe7 | 631 | symbol_filter_t filter) |
2e538c4a | 632 | { |
9de89fe7 | 633 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 634 | struct machine *machine = kmaps->machine; |
4e06255f | 635 | struct map *curr_map = map; |
2e538c4a | 636 | struct symbol *pos; |
8a953312 | 637 | int count = 0, moved = 0; |
aeafcbaf | 638 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 639 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
640 | int kernel_range = 0; |
641 | ||
642 | while (next) { | |
643 | char *module; | |
644 | ||
645 | pos = rb_entry(next, struct symbol, rb_node); | |
646 | next = rb_next(&pos->rb_node); | |
647 | ||
648 | module = strchr(pos->name, '\t'); | |
649 | if (module) { | |
75be6cf4 | 650 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
651 | goto discard_symbol; |
652 | ||
2e538c4a ACM |
653 | *module++ = '\0'; |
654 | ||
b7cece76 | 655 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 656 | if (curr_map != map && |
aeafcbaf | 657 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 658 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
659 | /* |
660 | * We assume all symbols of a module are | |
661 | * continuous in * kallsyms, so curr_map | |
662 | * points to a module and all its | |
663 | * symbols are in its kmap. Mark it as | |
664 | * loaded. | |
665 | */ | |
666 | dso__set_loaded(curr_map->dso, | |
667 | curr_map->type); | |
668 | } | |
669 | ||
670 | curr_map = map_groups__find_by_name(kmaps, | |
671 | map->type, module); | |
4e06255f | 672 | if (curr_map == NULL) { |
2f51903b | 673 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 674 | "inconsistency while looking " |
a1645ce1 | 675 | "for \"%s\" module!\n", |
23346f21 | 676 | machine->root_dir, module); |
a1645ce1 ZY |
677 | curr_map = map; |
678 | goto discard_symbol; | |
af427bf5 | 679 | } |
b7cece76 | 680 | |
a1645ce1 | 681 | if (curr_map->dso->loaded && |
23346f21 | 682 | !machine__is_default_guest(machine)) |
b7cece76 | 683 | goto discard_symbol; |
af427bf5 | 684 | } |
2e538c4a ACM |
685 | /* |
686 | * So that we look just like we get from .ko files, | |
687 | * i.e. not prelinked, relative to map->start. | |
688 | */ | |
4e06255f ACM |
689 | pos->start = curr_map->map_ip(curr_map, pos->start); |
690 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
691 | } else if (curr_map != map) { | |
2e538c4a | 692 | char dso_name[PATH_MAX]; |
aeafcbaf | 693 | struct dso *ndso; |
2e538c4a | 694 | |
d9b62aba AH |
695 | if (delta) { |
696 | /* Kernel was relocated at boot time */ | |
697 | pos->start -= delta; | |
698 | pos->end -= delta; | |
699 | } | |
700 | ||
8a953312 ACM |
701 | if (count == 0) { |
702 | curr_map = map; | |
703 | goto filter_symbol; | |
704 | } | |
705 | ||
aeafcbaf | 706 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
707 | snprintf(dso_name, sizeof(dso_name), |
708 | "[guest.kernel].%d", | |
709 | kernel_range++); | |
710 | else | |
711 | snprintf(dso_name, sizeof(dso_name), | |
712 | "[kernel].%d", | |
713 | kernel_range++); | |
2e538c4a | 714 | |
aeafcbaf ACM |
715 | ndso = dso__new(dso_name); |
716 | if (ndso == NULL) | |
2e538c4a ACM |
717 | return -1; |
718 | ||
aeafcbaf | 719 | ndso->kernel = dso->kernel; |
a1645ce1 | 720 | |
aeafcbaf | 721 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 722 | if (curr_map == NULL) { |
aeafcbaf | 723 | dso__delete(ndso); |
2e538c4a ACM |
724 | return -1; |
725 | } | |
a2928c42 | 726 | |
4e06255f | 727 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 728 | map_groups__insert(kmaps, curr_map); |
2e538c4a | 729 | ++kernel_range; |
d9b62aba AH |
730 | } else if (delta) { |
731 | /* Kernel was relocated at boot time */ | |
732 | pos->start -= delta; | |
733 | pos->end -= delta; | |
2e538c4a | 734 | } |
8a953312 | 735 | filter_symbol: |
4e06255f | 736 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 737 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 738 | symbol__delete(pos); |
2e538c4a | 739 | } else { |
4e06255f ACM |
740 | if (curr_map != map) { |
741 | rb_erase(&pos->rb_node, root); | |
742 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
743 | ++moved; |
744 | } else | |
745 | ++count; | |
9974f496 | 746 | } |
a2928c42 ACM |
747 | } |
748 | ||
a1645ce1 | 749 | if (curr_map != map && |
aeafcbaf | 750 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 751 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
752 | dso__set_loaded(curr_map->dso, curr_map->type); |
753 | } | |
754 | ||
8a953312 | 755 | return count + moved; |
2e538c4a | 756 | } |
a2928c42 | 757 | |
3f067dca ACM |
758 | bool symbol__restricted_filename(const char *filename, |
759 | const char *restricted_filename) | |
ec80fde7 ACM |
760 | { |
761 | bool restricted = false; | |
762 | ||
763 | if (symbol_conf.kptr_restrict) { | |
764 | char *r = realpath(filename, NULL); | |
765 | ||
766 | if (r != NULL) { | |
767 | restricted = strcmp(r, restricted_filename) == 0; | |
768 | free(r); | |
769 | return restricted; | |
770 | } | |
771 | } | |
772 | ||
773 | return restricted; | |
774 | } | |
775 | ||
52afdaf9 AH |
776 | struct module_info { |
777 | struct rb_node rb_node; | |
778 | char *name; | |
779 | u64 start; | |
8e0cf965 AH |
780 | }; |
781 | ||
52afdaf9 | 782 | static void add_module(struct module_info *mi, struct rb_root *modules) |
8e0cf965 | 783 | { |
52afdaf9 AH |
784 | struct rb_node **p = &modules->rb_node; |
785 | struct rb_node *parent = NULL; | |
786 | struct module_info *m; | |
8e0cf965 | 787 | |
52afdaf9 AH |
788 | while (*p != NULL) { |
789 | parent = *p; | |
790 | m = rb_entry(parent, struct module_info, rb_node); | |
791 | if (strcmp(mi->name, m->name) < 0) | |
792 | p = &(*p)->rb_left; | |
793 | else | |
794 | p = &(*p)->rb_right; | |
795 | } | |
796 | rb_link_node(&mi->rb_node, parent, p); | |
797 | rb_insert_color(&mi->rb_node, modules); | |
798 | } | |
799 | ||
800 | static void delete_modules(struct rb_root *modules) | |
801 | { | |
802 | struct module_info *mi; | |
803 | struct rb_node *next = rb_first(modules); | |
804 | ||
805 | while (next) { | |
806 | mi = rb_entry(next, struct module_info, rb_node); | |
807 | next = rb_next(&mi->rb_node); | |
808 | rb_erase(&mi->rb_node, modules); | |
74cf249d | 809 | zfree(&mi->name); |
52afdaf9 AH |
810 | free(mi); |
811 | } | |
812 | } | |
813 | ||
814 | static struct module_info *find_module(const char *name, | |
815 | struct rb_root *modules) | |
816 | { | |
817 | struct rb_node *n = modules->rb_node; | |
818 | ||
819 | while (n) { | |
820 | struct module_info *m; | |
821 | int cmp; | |
822 | ||
823 | m = rb_entry(n, struct module_info, rb_node); | |
824 | cmp = strcmp(name, m->name); | |
825 | if (cmp < 0) | |
826 | n = n->rb_left; | |
827 | else if (cmp > 0) | |
828 | n = n->rb_right; | |
829 | else | |
830 | return m; | |
831 | } | |
832 | ||
833 | return NULL; | |
834 | } | |
835 | ||
836 | static int __read_proc_modules(void *arg, const char *name, u64 start) | |
837 | { | |
838 | struct rb_root *modules = arg; | |
839 | struct module_info *mi; | |
840 | ||
841 | mi = zalloc(sizeof(struct module_info)); | |
842 | if (!mi) | |
8e0cf965 AH |
843 | return -ENOMEM; |
844 | ||
52afdaf9 AH |
845 | mi->name = strdup(name); |
846 | mi->start = start; | |
8e0cf965 | 847 | |
52afdaf9 AH |
848 | if (!mi->name) { |
849 | free(mi); | |
850 | return -ENOMEM; | |
851 | } | |
852 | ||
853 | add_module(mi, modules); | |
854 | ||
855 | return 0; | |
856 | } | |
857 | ||
858 | static int read_proc_modules(const char *filename, struct rb_root *modules) | |
859 | { | |
860 | if (symbol__restricted_filename(filename, "/proc/modules")) | |
861 | return -1; | |
862 | ||
863 | if (modules__parse(filename, modules, __read_proc_modules)) { | |
864 | delete_modules(modules); | |
865 | return -1; | |
866 | } | |
8e0cf965 AH |
867 | |
868 | return 0; | |
869 | } | |
870 | ||
fc1b691d AH |
871 | int compare_proc_modules(const char *from, const char *to) |
872 | { | |
873 | struct rb_root from_modules = RB_ROOT; | |
874 | struct rb_root to_modules = RB_ROOT; | |
875 | struct rb_node *from_node, *to_node; | |
876 | struct module_info *from_m, *to_m; | |
877 | int ret = -1; | |
878 | ||
879 | if (read_proc_modules(from, &from_modules)) | |
880 | return -1; | |
881 | ||
882 | if (read_proc_modules(to, &to_modules)) | |
883 | goto out_delete_from; | |
884 | ||
885 | from_node = rb_first(&from_modules); | |
886 | to_node = rb_first(&to_modules); | |
887 | while (from_node) { | |
888 | if (!to_node) | |
889 | break; | |
890 | ||
891 | from_m = rb_entry(from_node, struct module_info, rb_node); | |
892 | to_m = rb_entry(to_node, struct module_info, rb_node); | |
893 | ||
894 | if (from_m->start != to_m->start || | |
895 | strcmp(from_m->name, to_m->name)) | |
896 | break; | |
897 | ||
898 | from_node = rb_next(from_node); | |
899 | to_node = rb_next(to_node); | |
900 | } | |
901 | ||
902 | if (!from_node && !to_node) | |
903 | ret = 0; | |
904 | ||
905 | delete_modules(&to_modules); | |
906 | out_delete_from: | |
907 | delete_modules(&from_modules); | |
908 | ||
909 | return ret; | |
910 | } | |
911 | ||
52afdaf9 AH |
912 | static int do_validate_kcore_modules(const char *filename, struct map *map, |
913 | struct map_groups *kmaps) | |
914 | { | |
915 | struct rb_root modules = RB_ROOT; | |
916 | struct map *old_map; | |
917 | int err; | |
918 | ||
919 | err = read_proc_modules(filename, &modules); | |
920 | if (err) | |
921 | return err; | |
922 | ||
923 | old_map = map_groups__first(kmaps, map->type); | |
924 | while (old_map) { | |
925 | struct map *next = map_groups__next(old_map); | |
926 | struct module_info *mi; | |
927 | ||
928 | if (old_map == map || old_map->start == map->start) { | |
929 | /* The kernel map */ | |
930 | old_map = next; | |
931 | continue; | |
932 | } | |
933 | ||
934 | /* Module must be in memory at the same address */ | |
935 | mi = find_module(old_map->dso->short_name, &modules); | |
936 | if (!mi || mi->start != old_map->start) { | |
937 | err = -EINVAL; | |
938 | goto out; | |
939 | } | |
940 | ||
941 | old_map = next; | |
942 | } | |
943 | out: | |
944 | delete_modules(&modules); | |
945 | return err; | |
946 | } | |
947 | ||
8e0cf965 | 948 | /* |
52afdaf9 | 949 | * If kallsyms is referenced by name then we look for filename in the same |
8e0cf965 AH |
950 | * directory. |
951 | */ | |
52afdaf9 AH |
952 | static bool filename_from_kallsyms_filename(char *filename, |
953 | const char *base_name, | |
954 | const char *kallsyms_filename) | |
8e0cf965 AH |
955 | { |
956 | char *name; | |
957 | ||
52afdaf9 AH |
958 | strcpy(filename, kallsyms_filename); |
959 | name = strrchr(filename, '/'); | |
8e0cf965 AH |
960 | if (!name) |
961 | return false; | |
962 | ||
52afdaf9 AH |
963 | name += 1; |
964 | ||
965 | if (!strcmp(name, "kallsyms")) { | |
966 | strcpy(name, base_name); | |
8e0cf965 AH |
967 | return true; |
968 | } | |
969 | ||
970 | return false; | |
971 | } | |
972 | ||
52afdaf9 AH |
973 | static int validate_kcore_modules(const char *kallsyms_filename, |
974 | struct map *map) | |
975 | { | |
976 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
977 | char modules_filename[PATH_MAX]; | |
978 | ||
979 | if (!filename_from_kallsyms_filename(modules_filename, "modules", | |
980 | kallsyms_filename)) | |
981 | return -EINVAL; | |
982 | ||
983 | if (do_validate_kcore_modules(modules_filename, map, kmaps)) | |
984 | return -EINVAL; | |
985 | ||
986 | return 0; | |
987 | } | |
988 | ||
a00d28cb AH |
989 | static int validate_kcore_addresses(const char *kallsyms_filename, |
990 | struct map *map) | |
991 | { | |
992 | struct kmap *kmap = map__kmap(map); | |
993 | ||
994 | if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) { | |
995 | u64 start; | |
996 | ||
997 | start = kallsyms__get_function_start(kallsyms_filename, | |
998 | kmap->ref_reloc_sym->name); | |
999 | if (start != kmap->ref_reloc_sym->addr) | |
1000 | return -EINVAL; | |
1001 | } | |
1002 | ||
1003 | return validate_kcore_modules(kallsyms_filename, map); | |
1004 | } | |
1005 | ||
52afdaf9 AH |
1006 | struct kcore_mapfn_data { |
1007 | struct dso *dso; | |
1008 | enum map_type type; | |
1009 | struct list_head maps; | |
1010 | }; | |
1011 | ||
1012 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
1013 | { | |
1014 | struct kcore_mapfn_data *md = data; | |
1015 | struct map *map; | |
1016 | ||
1017 | map = map__new2(start, md->dso, md->type); | |
1018 | if (map == NULL) | |
1019 | return -ENOMEM; | |
1020 | ||
1021 | map->end = map->start + len; | |
1022 | map->pgoff = pgoff; | |
1023 | ||
1024 | list_add(&map->node, &md->maps); | |
1025 | ||
1026 | return 0; | |
1027 | } | |
1028 | ||
8e0cf965 AH |
1029 | static int dso__load_kcore(struct dso *dso, struct map *map, |
1030 | const char *kallsyms_filename) | |
1031 | { | |
1032 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
1033 | struct machine *machine = kmaps->machine; | |
1034 | struct kcore_mapfn_data md; | |
1035 | struct map *old_map, *new_map, *replacement_map = NULL; | |
1036 | bool is_64_bit; | |
1037 | int err, fd; | |
1038 | char kcore_filename[PATH_MAX]; | |
1039 | struct symbol *sym; | |
1040 | ||
1041 | /* This function requires that the map is the kernel map */ | |
1042 | if (map != machine->vmlinux_maps[map->type]) | |
1043 | return -EINVAL; | |
1044 | ||
52afdaf9 AH |
1045 | if (!filename_from_kallsyms_filename(kcore_filename, "kcore", |
1046 | kallsyms_filename)) | |
1047 | return -EINVAL; | |
1048 | ||
a00d28cb AH |
1049 | /* Modules and kernel must be present at their original addresses */ |
1050 | if (validate_kcore_addresses(kallsyms_filename, map)) | |
8e0cf965 AH |
1051 | return -EINVAL; |
1052 | ||
1053 | md.dso = dso; | |
1054 | md.type = map->type; | |
1055 | INIT_LIST_HEAD(&md.maps); | |
1056 | ||
1057 | fd = open(kcore_filename, O_RDONLY); | |
1058 | if (fd < 0) | |
1059 | return -EINVAL; | |
1060 | ||
1061 | /* Read new maps into temporary lists */ | |
1062 | err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md, | |
1063 | &is_64_bit); | |
1064 | if (err) | |
1065 | goto out_err; | |
1066 | ||
1067 | if (list_empty(&md.maps)) { | |
1068 | err = -EINVAL; | |
1069 | goto out_err; | |
1070 | } | |
1071 | ||
1072 | /* Remove old maps */ | |
1073 | old_map = map_groups__first(kmaps, map->type); | |
1074 | while (old_map) { | |
1075 | struct map *next = map_groups__next(old_map); | |
1076 | ||
1077 | if (old_map != map) | |
1078 | map_groups__remove(kmaps, old_map); | |
1079 | old_map = next; | |
1080 | } | |
1081 | ||
1082 | /* Find the kernel map using the first symbol */ | |
1083 | sym = dso__first_symbol(dso, map->type); | |
1084 | list_for_each_entry(new_map, &md.maps, node) { | |
1085 | if (sym && sym->start >= new_map->start && | |
1086 | sym->start < new_map->end) { | |
1087 | replacement_map = new_map; | |
1088 | break; | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | if (!replacement_map) | |
1093 | replacement_map = list_entry(md.maps.next, struct map, node); | |
1094 | ||
1095 | /* Add new maps */ | |
1096 | while (!list_empty(&md.maps)) { | |
1097 | new_map = list_entry(md.maps.next, struct map, node); | |
1098 | list_del(&new_map->node); | |
1099 | if (new_map == replacement_map) { | |
1100 | map->start = new_map->start; | |
1101 | map->end = new_map->end; | |
1102 | map->pgoff = new_map->pgoff; | |
1103 | map->map_ip = new_map->map_ip; | |
1104 | map->unmap_ip = new_map->unmap_ip; | |
1105 | map__delete(new_map); | |
1106 | /* Ensure maps are correctly ordered */ | |
1107 | map_groups__remove(kmaps, map); | |
1108 | map_groups__insert(kmaps, map); | |
1109 | } else { | |
1110 | map_groups__insert(kmaps, new_map); | |
1111 | } | |
1112 | } | |
1113 | ||
1114 | /* | |
1115 | * Set the data type and long name so that kcore can be read via | |
1116 | * dso__data_read_addr(). | |
1117 | */ | |
1118 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
5f70619d | 1119 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE; |
8e0cf965 | 1120 | else |
5f70619d | 1121 | dso->binary_type = DSO_BINARY_TYPE__KCORE; |
7e155d4d | 1122 | dso__set_long_name(dso, strdup(kcore_filename), true); |
8e0cf965 AH |
1123 | |
1124 | close(fd); | |
1125 | ||
1126 | if (map->type == MAP__FUNCTION) | |
1127 | pr_debug("Using %s for kernel object code\n", kcore_filename); | |
1128 | else | |
1129 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
1130 | ||
1131 | return 0; | |
1132 | ||
1133 | out_err: | |
1134 | while (!list_empty(&md.maps)) { | |
1135 | map = list_entry(md.maps.next, struct map, node); | |
1136 | list_del(&map->node); | |
1137 | map__delete(map); | |
1138 | } | |
1139 | close(fd); | |
1140 | return -EINVAL; | |
1141 | } | |
1142 | ||
d9b62aba AH |
1143 | /* |
1144 | * If the kernel is relocated at boot time, kallsyms won't match. Compute the | |
1145 | * delta based on the relocation reference symbol. | |
1146 | */ | |
1147 | static int kallsyms__delta(struct map *map, const char *filename, u64 *delta) | |
1148 | { | |
1149 | struct kmap *kmap = map__kmap(map); | |
1150 | u64 addr; | |
1151 | ||
1152 | if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name) | |
1153 | return 0; | |
1154 | ||
1155 | addr = kallsyms__get_function_start(filename, | |
1156 | kmap->ref_reloc_sym->name); | |
1157 | if (!addr) | |
1158 | return -1; | |
1159 | ||
1160 | *delta = addr - kmap->ref_reloc_sym->addr; | |
1161 | return 0; | |
1162 | } | |
1163 | ||
aeafcbaf | 1164 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 1165 | struct map *map, symbol_filter_t filter) |
2e538c4a | 1166 | { |
d9b62aba AH |
1167 | u64 delta = 0; |
1168 | ||
ec80fde7 ACM |
1169 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1170 | return -1; | |
1171 | ||
aeafcbaf | 1172 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
1173 | return -1; |
1174 | ||
d9b62aba AH |
1175 | if (kallsyms__delta(map, filename, &delta)) |
1176 | return -1; | |
1177 | ||
694bf407 | 1178 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
1179 | symbols__fixup_end(&dso->symbols[map->type]); |
1180 | ||
aeafcbaf | 1181 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 1182 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 1183 | else |
44f24cb3 | 1184 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 1185 | |
8e0cf965 AH |
1186 | if (!dso__load_kcore(dso, map, filename)) |
1187 | return dso__split_kallsyms_for_kcore(dso, map, filter); | |
1188 | else | |
d9b62aba | 1189 | return dso__split_kallsyms(dso, map, delta, filter); |
af427bf5 ACM |
1190 | } |
1191 | ||
aeafcbaf | 1192 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 1193 | symbol_filter_t filter) |
80d496be PE |
1194 | { |
1195 | char *line = NULL; | |
1196 | size_t n; | |
1197 | FILE *file; | |
1198 | int nr_syms = 0; | |
1199 | ||
aeafcbaf | 1200 | file = fopen(dso->long_name, "r"); |
80d496be PE |
1201 | if (file == NULL) |
1202 | goto out_failure; | |
1203 | ||
1204 | while (!feof(file)) { | |
9cffa8d5 | 1205 | u64 start, size; |
80d496be PE |
1206 | struct symbol *sym; |
1207 | int line_len, len; | |
1208 | ||
1209 | line_len = getline(&line, &n, file); | |
1210 | if (line_len < 0) | |
1211 | break; | |
1212 | ||
1213 | if (!line) | |
1214 | goto out_failure; | |
1215 | ||
1216 | line[--line_len] = '\0'; /* \n */ | |
1217 | ||
1218 | len = hex2u64(line, &start); | |
1219 | ||
1220 | len++; | |
1221 | if (len + 2 >= line_len) | |
1222 | continue; | |
1223 | ||
1224 | len += hex2u64(line + len, &size); | |
1225 | ||
1226 | len++; | |
1227 | if (len + 2 >= line_len) | |
1228 | continue; | |
1229 | ||
c408fedf | 1230 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
1231 | |
1232 | if (sym == NULL) | |
1233 | goto out_delete_line; | |
1234 | ||
439d473b | 1235 | if (filter && filter(map, sym)) |
00a192b3 | 1236 | symbol__delete(sym); |
80d496be | 1237 | else { |
aeafcbaf | 1238 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
1239 | nr_syms++; |
1240 | } | |
1241 | } | |
1242 | ||
1243 | free(line); | |
1244 | fclose(file); | |
1245 | ||
1246 | return nr_syms; | |
1247 | ||
1248 | out_delete_line: | |
1249 | free(line); | |
1250 | out_failure: | |
1251 | return -1; | |
1252 | } | |
1253 | ||
aeafcbaf | 1254 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1255 | { |
c338aee8 | 1256 | char *name; |
a2928c42 | 1257 | int ret = -1; |
44f24cb3 | 1258 | u_int i; |
23346f21 | 1259 | struct machine *machine; |
44f24cb3 | 1260 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1261 | int ss_pos = 0; |
1262 | struct symsrc ss_[2]; | |
1263 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
a2928c42 | 1264 | |
aeafcbaf | 1265 | dso__set_loaded(dso, map->type); |
66bd8424 | 1266 | |
aeafcbaf ACM |
1267 | if (dso->kernel == DSO_TYPE_KERNEL) |
1268 | return dso__load_kernel_sym(dso, map, filter); | |
1269 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1270 | return dso__load_guest_kernel_sym(dso, map, filter); | |
a1645ce1 | 1271 | |
23346f21 ACM |
1272 | if (map->groups && map->groups->machine) |
1273 | machine = map->groups->machine; | |
a1645ce1 | 1274 | else |
23346f21 | 1275 | machine = NULL; |
c338aee8 | 1276 | |
aeafcbaf | 1277 | dso->adjust_symbols = 0; |
f5812a7a | 1278 | |
aeafcbaf | 1279 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1280 | struct stat st; |
1281 | ||
e9b52ef2 | 1282 | if (lstat(dso->name, &st) < 0) |
981c1252 PE |
1283 | return -1; |
1284 | ||
1285 | if (st.st_uid && (st.st_uid != geteuid())) { | |
1286 | pr_warning("File %s not owned by current user or root, " | |
1287 | "ignoring it.\n", dso->name); | |
1288 | return -1; | |
1289 | } | |
1290 | ||
aeafcbaf | 1291 | ret = dso__load_perf_map(dso, map, filter); |
44f24cb3 JO |
1292 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1293 | DSO_BINARY_TYPE__NOT_FOUND; | |
94cb9e38 ACM |
1294 | return ret; |
1295 | } | |
1296 | ||
44f24cb3 JO |
1297 | if (machine) |
1298 | root_dir = machine->root_dir; | |
1299 | ||
164c800e DA |
1300 | name = malloc(PATH_MAX); |
1301 | if (!name) | |
1302 | return -1; | |
1303 | ||
6da80ce8 | 1304 | /* Iterate over candidate debug images. |
3aafe5ae CS |
1305 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1306 | * and/or opd section) for processing. | |
6da80ce8 | 1307 | */ |
44f24cb3 | 1308 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1309 | struct symsrc *ss = &ss_[ss_pos]; |
1310 | bool next_slot = false; | |
6da80ce8 | 1311 | |
005f9294 | 1312 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1313 | |
ee4e9625 ACM |
1314 | if (dso__read_binary_type_filename(dso, symtab_type, |
1315 | root_dir, name, PATH_MAX)) | |
44f24cb3 | 1316 | continue; |
6da80ce8 DM |
1317 | |
1318 | /* Name is now the name of the next image to try */ | |
3aafe5ae | 1319 | if (symsrc__init(ss, dso, name, symtab_type) < 0) |
6da80ce8 | 1320 | continue; |
a2928c42 | 1321 | |
3aafe5ae CS |
1322 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1323 | syms_ss = ss; | |
1324 | next_slot = true; | |
0058aef6 AH |
1325 | if (!dso->symsrc_filename) |
1326 | dso->symsrc_filename = strdup(name); | |
d26cd12b CS |
1327 | } |
1328 | ||
3aafe5ae CS |
1329 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1330 | runtime_ss = ss; | |
1331 | next_slot = true; | |
a44f605b | 1332 | } |
a2928c42 | 1333 | |
3aafe5ae CS |
1334 | if (next_slot) { |
1335 | ss_pos++; | |
33ff581e | 1336 | |
3aafe5ae CS |
1337 | if (syms_ss && runtime_ss) |
1338 | break; | |
98e9f03b NK |
1339 | } else { |
1340 | symsrc__destroy(ss); | |
6da80ce8 | 1341 | } |
3aafe5ae | 1342 | |
a25e46c4 | 1343 | } |
6da80ce8 | 1344 | |
3aafe5ae CS |
1345 | if (!runtime_ss && !syms_ss) |
1346 | goto out_free; | |
1347 | ||
1348 | if (runtime_ss && !syms_ss) { | |
1349 | syms_ss = runtime_ss; | |
1350 | } | |
1351 | ||
1352 | /* We'll have to hope for the best */ | |
1353 | if (!runtime_ss && syms_ss) | |
1354 | runtime_ss = syms_ss; | |
1355 | ||
0131c4ec AH |
1356 | if (syms_ss) { |
1357 | int km; | |
1358 | ||
1359 | km = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
1360 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
1361 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, km); | |
1362 | } else { | |
3aafe5ae | 1363 | ret = -1; |
0131c4ec | 1364 | } |
3aafe5ae | 1365 | |
f47b58b7 | 1366 | if (ret > 0) { |
3aafe5ae CS |
1367 | int nr_plt; |
1368 | ||
1369 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map, filter); | |
1370 | if (nr_plt > 0) | |
1371 | ret += nr_plt; | |
60e4b10c ACM |
1372 | } |
1373 | ||
3aafe5ae CS |
1374 | for (; ss_pos > 0; ss_pos--) |
1375 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1376 | out_free: | |
a2928c42 | 1377 | free(name); |
aeafcbaf | 1378 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
1340e6bb | 1379 | return 0; |
a2928c42 ACM |
1380 | return ret; |
1381 | } | |
1382 | ||
aeafcbaf | 1383 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1384 | enum map_type type, const char *name) |
439d473b ACM |
1385 | { |
1386 | struct rb_node *nd; | |
1387 | ||
aeafcbaf | 1388 | for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1389 | struct map *map = rb_entry(nd, struct map, rb_node); |
1390 | ||
b7cece76 | 1391 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1392 | return map; |
1393 | } | |
1394 | ||
1395 | return NULL; | |
1396 | } | |
1397 | ||
aeafcbaf | 1398 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
5230fb7d ACM |
1399 | const char *vmlinux, bool vmlinux_allocated, |
1400 | symbol_filter_t filter) | |
a2928c42 | 1401 | { |
b68e2f91 CS |
1402 | int err = -1; |
1403 | struct symsrc ss; | |
ec5761ea | 1404 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1405 | enum dso_binary_type symtab_type; |
a2928c42 | 1406 | |
5698d2c9 NK |
1407 | if (vmlinux[0] == '/') |
1408 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1409 | else | |
1410 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s", | |
1411 | symbol_conf.symfs, vmlinux); | |
a2928c42 | 1412 | |
21ea4539 | 1413 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1414 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1415 | else |
005f9294 | 1416 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1417 | |
005f9294 | 1418 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1419 | return -1; |
1420 | ||
261360b6 | 1421 | err = dso__load_sym(dso, map, &ss, &ss, filter, 0); |
b68e2f91 | 1422 | symsrc__destroy(&ss); |
a2928c42 | 1423 | |
515850e4 | 1424 | if (err > 0) { |
39b12f78 | 1425 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
5f70619d | 1426 | dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
39b12f78 | 1427 | else |
5f70619d | 1428 | dso->binary_type = DSO_BINARY_TYPE__VMLINUX; |
bf4414ae | 1429 | dso__set_long_name(dso, vmlinux, vmlinux_allocated); |
515850e4 | 1430 | dso__set_loaded(dso, map->type); |
ec5761ea | 1431 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1432 | } |
3846df2e | 1433 | |
a2928c42 ACM |
1434 | return err; |
1435 | } | |
1436 | ||
aeafcbaf | 1437 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 1438 | symbol_filter_t filter) |
a19afe46 ACM |
1439 | { |
1440 | int i, err = 0; | |
5ad90e4e | 1441 | char *filename; |
a19afe46 ACM |
1442 | |
1443 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
1444 | vmlinux_path__nr_entries + 1); |
1445 | ||
aeafcbaf | 1446 | filename = dso__build_id_filename(dso, NULL, 0); |
5ad90e4e | 1447 | if (filename != NULL) { |
5230fb7d ACM |
1448 | err = dso__load_vmlinux(dso, map, filename, true, filter); |
1449 | if (err > 0) | |
5ad90e4e | 1450 | goto out; |
5ad90e4e ACM |
1451 | free(filename); |
1452 | } | |
a19afe46 ACM |
1453 | |
1454 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
5230fb7d ACM |
1455 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], false, filter); |
1456 | if (err > 0) | |
a19afe46 | 1457 | break; |
a19afe46 | 1458 | } |
5ad90e4e | 1459 | out: |
a19afe46 ACM |
1460 | return err; |
1461 | } | |
1462 | ||
0544d422 AH |
1463 | static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz) |
1464 | { | |
1465 | char kallsyms_filename[PATH_MAX]; | |
1466 | struct dirent *dent; | |
1467 | int ret = -1; | |
1468 | DIR *d; | |
1469 | ||
1470 | d = opendir(dir); | |
1471 | if (!d) | |
1472 | return -1; | |
1473 | ||
1474 | while (1) { | |
1475 | dent = readdir(d); | |
1476 | if (!dent) | |
1477 | break; | |
1478 | if (dent->d_type != DT_DIR) | |
1479 | continue; | |
1480 | scnprintf(kallsyms_filename, sizeof(kallsyms_filename), | |
1481 | "%s/%s/kallsyms", dir, dent->d_name); | |
a00d28cb | 1482 | if (!validate_kcore_addresses(kallsyms_filename, map)) { |
0544d422 AH |
1483 | strlcpy(dir, kallsyms_filename, dir_sz); |
1484 | ret = 0; | |
1485 | break; | |
1486 | } | |
1487 | } | |
1488 | ||
1489 | closedir(d); | |
1490 | ||
1491 | return ret; | |
1492 | } | |
1493 | ||
1494 | static char *dso__find_kallsyms(struct dso *dso, struct map *map) | |
1495 | { | |
1496 | u8 host_build_id[BUILD_ID_SIZE]; | |
1497 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
1498 | bool is_host = false; | |
1499 | char path[PATH_MAX]; | |
1500 | ||
1501 | if (!dso->has_build_id) { | |
1502 | /* | |
1503 | * Last resort, if we don't have a build-id and couldn't find | |
1504 | * any vmlinux file, try the running kernel kallsyms table. | |
1505 | */ | |
1506 | goto proc_kallsyms; | |
1507 | } | |
1508 | ||
1509 | if (sysfs__read_build_id("/sys/kernel/notes", host_build_id, | |
1510 | sizeof(host_build_id)) == 0) | |
1511 | is_host = dso__build_id_equal(dso, host_build_id); | |
1512 | ||
1513 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
1514 | ||
449867e3 AH |
1515 | scnprintf(path, sizeof(path), "%s/[kernel.kcore]/%s", buildid_dir, |
1516 | sbuild_id); | |
1517 | ||
0544d422 AH |
1518 | /* Use /proc/kallsyms if possible */ |
1519 | if (is_host) { | |
1520 | DIR *d; | |
1521 | int fd; | |
1522 | ||
1523 | /* If no cached kcore go with /proc/kallsyms */ | |
0544d422 AH |
1524 | d = opendir(path); |
1525 | if (!d) | |
1526 | goto proc_kallsyms; | |
1527 | closedir(d); | |
1528 | ||
1529 | /* | |
1530 | * Do not check the build-id cache, until we know we cannot use | |
1531 | * /proc/kcore. | |
1532 | */ | |
1533 | fd = open("/proc/kcore", O_RDONLY); | |
1534 | if (fd != -1) { | |
1535 | close(fd); | |
1536 | /* If module maps match go with /proc/kallsyms */ | |
a00d28cb | 1537 | if (!validate_kcore_addresses("/proc/kallsyms", map)) |
0544d422 AH |
1538 | goto proc_kallsyms; |
1539 | } | |
1540 | ||
1541 | /* Find kallsyms in build-id cache with kcore */ | |
1542 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1543 | return strdup(path); | |
1544 | ||
1545 | goto proc_kallsyms; | |
1546 | } | |
1547 | ||
449867e3 AH |
1548 | /* Find kallsyms in build-id cache with kcore */ |
1549 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1550 | return strdup(path); | |
1551 | ||
0544d422 AH |
1552 | scnprintf(path, sizeof(path), "%s/[kernel.kallsyms]/%s", |
1553 | buildid_dir, sbuild_id); | |
1554 | ||
1555 | if (access(path, F_OK)) { | |
1556 | pr_err("No kallsyms or vmlinux with build-id %s was found\n", | |
1557 | sbuild_id); | |
1558 | return NULL; | |
1559 | } | |
1560 | ||
1561 | return strdup(path); | |
1562 | ||
1563 | proc_kallsyms: | |
1564 | return strdup("/proc/kallsyms"); | |
1565 | } | |
1566 | ||
aeafcbaf | 1567 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 1568 | symbol_filter_t filter) |
a827c875 | 1569 | { |
cc612d81 | 1570 | int err; |
9e201442 ACM |
1571 | const char *kallsyms_filename = NULL; |
1572 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1573 | /* |
b226a5a7 DA |
1574 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1575 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1576 | * |
1577 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1578 | * build-id, or if the user specifies the wrong path to the right | |
1579 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1580 | * x86_86 one, on the machine where analysis is being performed, say), | |
1581 | * or worse, /proc/kallsyms. | |
1582 | * | |
1583 | * If the specified file _has_ a build-id and there is a build-id | |
1584 | * section in the perf.data file, we will still do the expected | |
1585 | * validation in dso__load_vmlinux and will bail out if they don't | |
1586 | * match. | |
1587 | */ | |
b226a5a7 DA |
1588 | if (symbol_conf.kallsyms_name != NULL) { |
1589 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1590 | goto do_kallsyms; | |
1591 | } | |
1592 | ||
fc2be696 | 1593 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
5230fb7d ACM |
1594 | return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, |
1595 | false, filter); | |
dc8d6ab2 | 1596 | } |
cc612d81 | 1597 | |
fc2be696 | 1598 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
aeafcbaf | 1599 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 | 1600 | if (err > 0) |
39b12f78 | 1601 | return err; |
cc612d81 ACM |
1602 | } |
1603 | ||
ec5761ea DA |
1604 | /* do not try local files if a symfs was given */ |
1605 | if (symbol_conf.symfs[0] != 0) | |
1606 | return -1; | |
1607 | ||
0544d422 AH |
1608 | kallsyms_allocated_filename = dso__find_kallsyms(dso, map); |
1609 | if (!kallsyms_allocated_filename) | |
1610 | return -1; | |
19fc2ded | 1611 | |
0544d422 | 1612 | kallsyms_filename = kallsyms_allocated_filename; |
439d473b | 1613 | |
cc612d81 | 1614 | do_kallsyms: |
aeafcbaf | 1615 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
1616 | if (err > 0) |
1617 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1618 | free(kallsyms_allocated_filename); |
439d473b | 1619 | |
8e0cf965 | 1620 | if (err > 0 && !dso__is_kcore(dso)) { |
bf4414ae | 1621 | dso__set_long_name(dso, "[kernel.kallsyms]", false); |
6a4694a4 ACM |
1622 | map__fixup_start(map); |
1623 | map__fixup_end(map); | |
439d473b | 1624 | } |
94cb9e38 | 1625 | |
a827c875 ACM |
1626 | return err; |
1627 | } | |
1628 | ||
aeafcbaf ACM |
1629 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
1630 | symbol_filter_t filter) | |
a1645ce1 ZY |
1631 | { |
1632 | int err; | |
1633 | const char *kallsyms_filename = NULL; | |
23346f21 | 1634 | struct machine *machine; |
a1645ce1 ZY |
1635 | char path[PATH_MAX]; |
1636 | ||
1637 | if (!map->groups) { | |
1638 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1639 | return -1; | |
1640 | } | |
23346f21 | 1641 | machine = map->groups->machine; |
a1645ce1 | 1642 | |
23346f21 | 1643 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1644 | /* |
1645 | * if the user specified a vmlinux filename, use it and only | |
1646 | * it, reporting errors to the user if it cannot be used. | |
1647 | * Or use file guest_kallsyms inputted by user on commandline | |
1648 | */ | |
1649 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1650 | err = dso__load_vmlinux(dso, map, |
5230fb7d ACM |
1651 | symbol_conf.default_guest_vmlinux_name, |
1652 | false, filter); | |
39b12f78 | 1653 | return err; |
a1645ce1 ZY |
1654 | } |
1655 | ||
1656 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1657 | if (!kallsyms_filename) | |
1658 | return -1; | |
1659 | } else { | |
23346f21 | 1660 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1661 | kallsyms_filename = path; |
1662 | } | |
1663 | ||
aeafcbaf | 1664 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
8e0cf965 | 1665 | if (err > 0) |
39b12f78 | 1666 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 1667 | if (err > 0 && !dso__is_kcore(dso)) { |
39b12f78 | 1668 | machine__mmap_name(machine, path, sizeof(path)); |
7e155d4d | 1669 | dso__set_long_name(dso, strdup(path), true); |
a1645ce1 ZY |
1670 | map__fixup_start(map); |
1671 | map__fixup_end(map); | |
1672 | } | |
1673 | ||
1674 | return err; | |
1675 | } | |
cd84c2ac | 1676 | |
cc612d81 ACM |
1677 | static void vmlinux_path__exit(void) |
1678 | { | |
04662523 ACM |
1679 | while (--vmlinux_path__nr_entries >= 0) |
1680 | zfree(&vmlinux_path[vmlinux_path__nr_entries]); | |
cc612d81 | 1681 | |
04662523 | 1682 | zfree(&vmlinux_path); |
cc612d81 ACM |
1683 | } |
1684 | ||
1685 | static int vmlinux_path__init(void) | |
1686 | { | |
1687 | struct utsname uts; | |
1688 | char bf[PATH_MAX]; | |
1689 | ||
cc612d81 ACM |
1690 | vmlinux_path = malloc(sizeof(char *) * 5); |
1691 | if (vmlinux_path == NULL) | |
1692 | return -1; | |
1693 | ||
1694 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
1695 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1696 | goto out_fail; | |
1697 | ++vmlinux_path__nr_entries; | |
1698 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
1699 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1700 | goto out_fail; | |
1701 | ++vmlinux_path__nr_entries; | |
ec5761ea DA |
1702 | |
1703 | /* only try running kernel version if no symfs was given */ | |
1704 | if (symbol_conf.symfs[0] != 0) | |
1705 | return 0; | |
1706 | ||
1707 | if (uname(&uts) < 0) | |
1708 | return -1; | |
1709 | ||
cc612d81 ACM |
1710 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); |
1711 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1712 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1713 | goto out_fail; | |
1714 | ++vmlinux_path__nr_entries; | |
1715 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
1716 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1717 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1718 | goto out_fail; | |
1719 | ++vmlinux_path__nr_entries; | |
1720 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
1721 | uts.release); | |
1722 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1723 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1724 | goto out_fail; | |
1725 | ++vmlinux_path__nr_entries; | |
1726 | ||
1727 | return 0; | |
1728 | ||
1729 | out_fail: | |
1730 | vmlinux_path__exit(); | |
1731 | return -1; | |
1732 | } | |
1733 | ||
3bfe5f81 | 1734 | int setup_list(struct strlist **list, const char *list_str, |
655000e7 ACM |
1735 | const char *list_name) |
1736 | { | |
1737 | if (list_str == NULL) | |
1738 | return 0; | |
1739 | ||
1740 | *list = strlist__new(true, list_str); | |
1741 | if (!*list) { | |
1742 | pr_err("problems parsing %s list\n", list_name); | |
1743 | return -1; | |
1744 | } | |
1745 | return 0; | |
1746 | } | |
1747 | ||
ec80fde7 ACM |
1748 | static bool symbol__read_kptr_restrict(void) |
1749 | { | |
1750 | bool value = false; | |
1751 | ||
1752 | if (geteuid() != 0) { | |
1753 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
1754 | if (fp != NULL) { | |
1755 | char line[8]; | |
1756 | ||
1757 | if (fgets(line, sizeof(line), fp) != NULL) | |
1758 | value = atoi(line) != 0; | |
1759 | ||
1760 | fclose(fp); | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | return value; | |
1765 | } | |
1766 | ||
75be6cf4 | 1767 | int symbol__init(void) |
2446042c | 1768 | { |
ec5761ea DA |
1769 | const char *symfs; |
1770 | ||
85e00b55 JZ |
1771 | if (symbol_conf.initialized) |
1772 | return 0; | |
1773 | ||
9ac3e487 | 1774 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 1775 | |
166ccc9c NK |
1776 | symbol__elf_init(); |
1777 | ||
75be6cf4 ACM |
1778 | if (symbol_conf.sort_by_name) |
1779 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
1780 | sizeof(struct symbol)); | |
b32d133a | 1781 | |
75be6cf4 | 1782 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
1783 | return -1; |
1784 | ||
c410a338 ACM |
1785 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
1786 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
1787 | return -1; | |
1788 | } | |
1789 | ||
655000e7 ACM |
1790 | if (setup_list(&symbol_conf.dso_list, |
1791 | symbol_conf.dso_list_str, "dso") < 0) | |
1792 | return -1; | |
1793 | ||
1794 | if (setup_list(&symbol_conf.comm_list, | |
1795 | symbol_conf.comm_list_str, "comm") < 0) | |
1796 | goto out_free_dso_list; | |
1797 | ||
1798 | if (setup_list(&symbol_conf.sym_list, | |
1799 | symbol_conf.sym_list_str, "symbol") < 0) | |
1800 | goto out_free_comm_list; | |
1801 | ||
ec5761ea DA |
1802 | /* |
1803 | * A path to symbols of "/" is identical to "" | |
1804 | * reset here for simplicity. | |
1805 | */ | |
1806 | symfs = realpath(symbol_conf.symfs, NULL); | |
1807 | if (symfs == NULL) | |
1808 | symfs = symbol_conf.symfs; | |
1809 | if (strcmp(symfs, "/") == 0) | |
1810 | symbol_conf.symfs = ""; | |
1811 | if (symfs != symbol_conf.symfs) | |
1812 | free((void *)symfs); | |
1813 | ||
ec80fde7 ACM |
1814 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
1815 | ||
85e00b55 | 1816 | symbol_conf.initialized = true; |
4aa65636 | 1817 | return 0; |
655000e7 | 1818 | |
655000e7 ACM |
1819 | out_free_comm_list: |
1820 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
1821 | out_free_dso_list: |
1822 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 1823 | return -1; |
4aa65636 ACM |
1824 | } |
1825 | ||
d65a458b ACM |
1826 | void symbol__exit(void) |
1827 | { | |
85e00b55 JZ |
1828 | if (!symbol_conf.initialized) |
1829 | return; | |
d65a458b ACM |
1830 | strlist__delete(symbol_conf.sym_list); |
1831 | strlist__delete(symbol_conf.dso_list); | |
1832 | strlist__delete(symbol_conf.comm_list); | |
1833 | vmlinux_path__exit(); | |
1834 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 1835 | symbol_conf.initialized = false; |
d65a458b | 1836 | } |