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 | size_t symbol__fprintf(struct symbol *sym, FILE *fp) |
a2928c42 | 259 | { |
9486aa38 | 260 | return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n", |
aeafcbaf ACM |
261 | sym->start, sym->end, |
262 | sym->binding == STB_GLOBAL ? 'g' : | |
263 | sym->binding == STB_LOCAL ? 'l' : 'w', | |
264 | sym->name); | |
a2928c42 ACM |
265 | } |
266 | ||
a978f2ab AN |
267 | size_t symbol__fprintf_symname_offs(const struct symbol *sym, |
268 | const struct addr_location *al, FILE *fp) | |
547a92e0 | 269 | { |
a978f2ab AN |
270 | unsigned long offset; |
271 | size_t length; | |
272 | ||
273 | if (sym && sym->name) { | |
274 | length = fprintf(fp, "%s", sym->name); | |
275 | if (al) { | |
0b8c25d9 DA |
276 | if (al->addr < sym->end) |
277 | offset = al->addr - sym->start; | |
278 | else | |
279 | offset = al->addr - al->map->start - sym->start; | |
a978f2ab AN |
280 | length += fprintf(fp, "+0x%lx", offset); |
281 | } | |
282 | return length; | |
283 | } else | |
284 | return fprintf(fp, "[unknown]"); | |
285 | } | |
547a92e0 | 286 | |
a978f2ab AN |
287 | size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp) |
288 | { | |
289 | return symbol__fprintf_symname_offs(sym, NULL, fp); | |
547a92e0 AN |
290 | } |
291 | ||
cdd059d7 | 292 | void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
293 | { |
294 | struct symbol *pos; | |
aeafcbaf | 295 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
296 | |
297 | while (next) { | |
298 | pos = rb_entry(next, struct symbol, rb_node); | |
299 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 300 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 301 | symbol__delete(pos); |
a2928c42 ACM |
302 | } |
303 | } | |
304 | ||
e5a1845f | 305 | void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
a2928c42 | 306 | { |
aeafcbaf | 307 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 308 | struct rb_node *parent = NULL; |
9cffa8d5 | 309 | const u64 ip = sym->start; |
a2928c42 ACM |
310 | struct symbol *s; |
311 | ||
312 | while (*p != NULL) { | |
313 | parent = *p; | |
314 | s = rb_entry(parent, struct symbol, rb_node); | |
315 | if (ip < s->start) | |
316 | p = &(*p)->rb_left; | |
317 | else | |
318 | p = &(*p)->rb_right; | |
319 | } | |
320 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 321 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
322 | } |
323 | ||
aeafcbaf | 324 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
325 | { |
326 | struct rb_node *n; | |
327 | ||
aeafcbaf | 328 | if (symbols == NULL) |
a2928c42 ACM |
329 | return NULL; |
330 | ||
aeafcbaf | 331 | n = symbols->rb_node; |
a2928c42 ACM |
332 | |
333 | while (n) { | |
334 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
335 | ||
336 | if (ip < s->start) | |
337 | n = n->rb_left; | |
2c241bd3 | 338 | else if (ip >= s->end) |
a2928c42 ACM |
339 | n = n->rb_right; |
340 | else | |
341 | return s; | |
342 | } | |
343 | ||
344 | return NULL; | |
345 | } | |
346 | ||
8e0cf965 AH |
347 | static struct symbol *symbols__first(struct rb_root *symbols) |
348 | { | |
349 | struct rb_node *n = rb_first(symbols); | |
350 | ||
351 | if (n) | |
352 | return rb_entry(n, struct symbol, rb_node); | |
353 | ||
354 | return NULL; | |
355 | } | |
356 | ||
9c00a81b AH |
357 | static struct symbol *symbols__next(struct symbol *sym) |
358 | { | |
359 | struct rb_node *n = rb_next(&sym->rb_node); | |
360 | ||
361 | if (n) | |
362 | return rb_entry(n, struct symbol, rb_node); | |
363 | ||
364 | return NULL; | |
365 | } | |
366 | ||
79406cd7 ACM |
367 | struct symbol_name_rb_node { |
368 | struct rb_node rb_node; | |
369 | struct symbol sym; | |
370 | }; | |
371 | ||
aeafcbaf | 372 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 373 | { |
aeafcbaf | 374 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 375 | struct rb_node *parent = NULL; |
02a9d037 RV |
376 | struct symbol_name_rb_node *symn, *s; |
377 | ||
378 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
379 | |
380 | while (*p != NULL) { | |
381 | parent = *p; | |
382 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
383 | if (strcmp(sym->name, s->sym.name) < 0) | |
384 | p = &(*p)->rb_left; | |
385 | else | |
386 | p = &(*p)->rb_right; | |
387 | } | |
388 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 389 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
390 | } |
391 | ||
aeafcbaf ACM |
392 | static void symbols__sort_by_name(struct rb_root *symbols, |
393 | struct rb_root *source) | |
79406cd7 ACM |
394 | { |
395 | struct rb_node *nd; | |
396 | ||
397 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
398 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 399 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
400 | } |
401 | } | |
402 | ||
aeafcbaf ACM |
403 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
404 | const char *name) | |
79406cd7 ACM |
405 | { |
406 | struct rb_node *n; | |
5bcaaca3 | 407 | struct symbol_name_rb_node *s = NULL; |
79406cd7 | 408 | |
aeafcbaf | 409 | if (symbols == NULL) |
79406cd7 ACM |
410 | return NULL; |
411 | ||
aeafcbaf | 412 | n = symbols->rb_node; |
79406cd7 ACM |
413 | |
414 | while (n) { | |
79406cd7 ACM |
415 | int cmp; |
416 | ||
417 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
031b84c4 | 418 | cmp = arch__compare_symbol_names(name, s->sym.name); |
79406cd7 ACM |
419 | |
420 | if (cmp < 0) | |
421 | n = n->rb_left; | |
422 | else if (cmp > 0) | |
423 | n = n->rb_right; | |
424 | else | |
de480999 | 425 | break; |
79406cd7 ACM |
426 | } |
427 | ||
de480999 NK |
428 | if (n == NULL) |
429 | return NULL; | |
430 | ||
431 | /* return first symbol that has same name (if any) */ | |
432 | for (n = rb_prev(n); n; n = rb_prev(n)) { | |
433 | struct symbol_name_rb_node *tmp; | |
434 | ||
435 | tmp = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
031b84c4 | 436 | if (arch__compare_symbol_names(tmp->sym.name, s->sym.name)) |
de480999 NK |
437 | break; |
438 | ||
439 | s = tmp; | |
440 | } | |
441 | ||
442 | return &s->sym; | |
79406cd7 ACM |
443 | } |
444 | ||
c0b4dffb ACM |
445 | void dso__reset_find_symbol_cache(struct dso *dso) |
446 | { | |
447 | enum map_type type; | |
448 | ||
449 | for (type = MAP__FUNCTION; type <= MAP__VARIABLE; ++type) { | |
450 | dso->last_find_result[type].addr = 0; | |
451 | dso->last_find_result[type].symbol = NULL; | |
452 | } | |
453 | } | |
454 | ||
aeafcbaf | 455 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 456 | enum map_type type, u64 addr) |
fcf1203a | 457 | { |
b685ac22 ACM |
458 | if (dso->last_find_result[type].addr != addr) { |
459 | dso->last_find_result[type].addr = addr; | |
460 | dso->last_find_result[type].symbol = symbols__find(&dso->symbols[type], addr); | |
461 | } | |
462 | ||
463 | return dso->last_find_result[type].symbol; | |
fcf1203a ACM |
464 | } |
465 | ||
9c00a81b | 466 | struct symbol *dso__first_symbol(struct dso *dso, enum map_type type) |
8e0cf965 AH |
467 | { |
468 | return symbols__first(&dso->symbols[type]); | |
9c00a81b AH |
469 | } |
470 | ||
471 | struct symbol *dso__next_symbol(struct symbol *sym) | |
472 | { | |
473 | return symbols__next(sym); | |
8e0cf965 AH |
474 | } |
475 | ||
18bd7264 ACM |
476 | struct symbol *symbol__next_by_name(struct symbol *sym) |
477 | { | |
478 | struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym); | |
479 | struct rb_node *n = rb_next(&s->rb_node); | |
480 | ||
481 | return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL; | |
482 | } | |
483 | ||
484 | /* | |
485 | * Teturns first symbol that matched with @name. | |
486 | */ | |
aeafcbaf | 487 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
488 | const char *name) |
489 | { | |
aeafcbaf | 490 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
491 | } |
492 | ||
aeafcbaf | 493 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 494 | { |
aeafcbaf ACM |
495 | dso__set_sorted_by_name(dso, type); |
496 | return symbols__sort_by_name(&dso->symbol_names[type], | |
497 | &dso->symbols[type]); | |
79406cd7 ACM |
498 | } |
499 | ||
aeafcbaf ACM |
500 | size_t dso__fprintf_symbols_by_name(struct dso *dso, |
501 | enum map_type type, FILE *fp) | |
90f18e63 SD |
502 | { |
503 | size_t ret = 0; | |
504 | struct rb_node *nd; | |
505 | struct symbol_name_rb_node *pos; | |
506 | ||
aeafcbaf | 507 | for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { |
90f18e63 SD |
508 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); |
509 | fprintf(fp, "%s\n", pos->sym.name); | |
510 | } | |
511 | ||
512 | return ret; | |
513 | } | |
514 | ||
316d70d6 AH |
515 | int modules__parse(const char *filename, void *arg, |
516 | int (*process_module)(void *arg, const char *name, | |
517 | u64 start)) | |
518 | { | |
519 | char *line = NULL; | |
520 | size_t n; | |
521 | FILE *file; | |
522 | int err = 0; | |
523 | ||
524 | file = fopen(filename, "r"); | |
525 | if (file == NULL) | |
526 | return -1; | |
527 | ||
528 | while (1) { | |
529 | char name[PATH_MAX]; | |
530 | u64 start; | |
531 | char *sep; | |
532 | ssize_t line_len; | |
533 | ||
534 | line_len = getline(&line, &n, file); | |
535 | if (line_len < 0) { | |
536 | if (feof(file)) | |
537 | break; | |
538 | err = -1; | |
539 | goto out; | |
540 | } | |
541 | ||
542 | if (!line) { | |
543 | err = -1; | |
544 | goto out; | |
545 | } | |
546 | ||
547 | line[--line_len] = '\0'; /* \n */ | |
548 | ||
549 | sep = strrchr(line, 'x'); | |
550 | if (sep == NULL) | |
551 | continue; | |
552 | ||
553 | hex2u64(sep + 1, &start); | |
554 | ||
555 | sep = strchr(line, ' '); | |
556 | if (sep == NULL) | |
557 | continue; | |
558 | ||
559 | *sep = '\0'; | |
560 | ||
561 | scnprintf(name, sizeof(name), "[%s]", line); | |
562 | ||
563 | err = process_module(arg, name, start); | |
564 | if (err) | |
565 | break; | |
566 | } | |
567 | out: | |
568 | free(line); | |
569 | fclose(file); | |
570 | return err; | |
571 | } | |
572 | ||
682b335a ACM |
573 | struct process_kallsyms_args { |
574 | struct map *map; | |
575 | struct dso *dso; | |
576 | }; | |
577 | ||
e7110b9f ACM |
578 | /* |
579 | * These are symbols in the kernel image, so make sure that | |
580 | * sym is from a kernel DSO. | |
581 | */ | |
82d1deb0 DA |
582 | bool symbol__is_idle(struct symbol *sym) |
583 | { | |
584 | const char * const idle_symbols[] = { | |
585 | "cpu_idle", | |
e0336ed6 | 586 | "cpu_startup_entry", |
82d1deb0 DA |
587 | "intel_idle", |
588 | "default_idle", | |
589 | "native_safe_halt", | |
590 | "enter_idle", | |
591 | "exit_idle", | |
592 | "mwait_idle", | |
593 | "mwait_idle_with_hints", | |
594 | "poll_idle", | |
595 | "ppc64_runlatch_off", | |
596 | "pseries_dedicated_idle_sleep", | |
597 | NULL | |
598 | }; | |
599 | ||
600 | int i; | |
601 | ||
602 | if (!sym) | |
603 | return false; | |
604 | ||
605 | for (i = 0; idle_symbols[i]; i++) { | |
606 | if (!strcmp(idle_symbols[i], sym->name)) | |
607 | return true; | |
608 | } | |
609 | ||
610 | return false; | |
611 | } | |
612 | ||
682b335a | 613 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 614 | char type, u64 start) |
682b335a ACM |
615 | { |
616 | struct symbol *sym; | |
617 | struct process_kallsyms_args *a = arg; | |
618 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
619 | ||
620 | if (!symbol_type__is_a(type, a->map->type)) | |
621 | return 0; | |
622 | ||
82151520 CS |
623 | /* |
624 | * module symbols are not sorted so we add all | |
625 | * symbols, setting length to 0, and rely on | |
626 | * symbols__fixup_end() to fix it up. | |
627 | */ | |
8e947f1e | 628 | sym = symbol__new(start, 0, kallsyms2elf_binding(type), name); |
682b335a ACM |
629 | if (sym == NULL) |
630 | return -ENOMEM; | |
631 | /* | |
632 | * We will pass the symbols to the filter later, in | |
633 | * map__split_kallsyms, when we have split the maps per module | |
634 | */ | |
635 | symbols__insert(root, sym); | |
a1645ce1 | 636 | |
682b335a ACM |
637 | return 0; |
638 | } | |
639 | ||
640 | /* | |
641 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
642 | * so that we can in the next step set the symbol ->end address and then | |
643 | * call kernel_maps__split_kallsyms. | |
644 | */ | |
aeafcbaf | 645 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 646 | struct map *map) |
682b335a | 647 | { |
aeafcbaf | 648 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 649 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
650 | } |
651 | ||
8e0cf965 AH |
652 | static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map, |
653 | symbol_filter_t filter) | |
654 | { | |
ba92732e | 655 | struct map_groups *kmaps = map__kmaps(map); |
8e0cf965 AH |
656 | struct map *curr_map; |
657 | struct symbol *pos; | |
866548dd AH |
658 | int count = 0; |
659 | struct rb_root old_root = dso->symbols[map->type]; | |
8e0cf965 AH |
660 | struct rb_root *root = &dso->symbols[map->type]; |
661 | struct rb_node *next = rb_first(root); | |
662 | ||
ba92732e WN |
663 | if (!kmaps) |
664 | return -1; | |
665 | ||
866548dd AH |
666 | *root = RB_ROOT; |
667 | ||
8e0cf965 AH |
668 | while (next) { |
669 | char *module; | |
670 | ||
671 | pos = rb_entry(next, struct symbol, rb_node); | |
672 | next = rb_next(&pos->rb_node); | |
673 | ||
866548dd AH |
674 | rb_erase_init(&pos->rb_node, &old_root); |
675 | ||
8e0cf965 AH |
676 | module = strchr(pos->name, '\t'); |
677 | if (module) | |
678 | *module = '\0'; | |
679 | ||
680 | curr_map = map_groups__find(kmaps, map->type, pos->start); | |
681 | ||
682 | if (!curr_map || (filter && filter(curr_map, pos))) { | |
8e0cf965 | 683 | symbol__delete(pos); |
866548dd | 684 | continue; |
8e0cf965 | 685 | } |
866548dd AH |
686 | |
687 | pos->start -= curr_map->start - curr_map->pgoff; | |
688 | if (pos->end) | |
689 | pos->end -= curr_map->start - curr_map->pgoff; | |
690 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
691 | ++count; | |
8e0cf965 AH |
692 | } |
693 | ||
694 | /* Symbols have been adjusted */ | |
695 | dso->adjust_symbols = 1; | |
696 | ||
866548dd | 697 | return count; |
8e0cf965 AH |
698 | } |
699 | ||
2e538c4a ACM |
700 | /* |
701 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
702 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
703 | * the original ELF section names vmlinux have. | |
704 | */ | |
d9b62aba | 705 | static int dso__split_kallsyms(struct dso *dso, struct map *map, u64 delta, |
9de89fe7 | 706 | symbol_filter_t filter) |
2e538c4a | 707 | { |
ba92732e WN |
708 | struct map_groups *kmaps = map__kmaps(map); |
709 | struct machine *machine; | |
4e06255f | 710 | struct map *curr_map = map; |
2e538c4a | 711 | struct symbol *pos; |
48000a1a | 712 | int count = 0, moved = 0; |
aeafcbaf | 713 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 714 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
715 | int kernel_range = 0; |
716 | ||
ba92732e WN |
717 | if (!kmaps) |
718 | return -1; | |
719 | ||
720 | machine = kmaps->machine; | |
721 | ||
2e538c4a ACM |
722 | while (next) { |
723 | char *module; | |
724 | ||
725 | pos = rb_entry(next, struct symbol, rb_node); | |
726 | next = rb_next(&pos->rb_node); | |
727 | ||
728 | module = strchr(pos->name, '\t'); | |
729 | if (module) { | |
75be6cf4 | 730 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
731 | goto discard_symbol; |
732 | ||
2e538c4a ACM |
733 | *module++ = '\0'; |
734 | ||
b7cece76 | 735 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 736 | if (curr_map != map && |
aeafcbaf | 737 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 738 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
739 | /* |
740 | * We assume all symbols of a module are | |
741 | * continuous in * kallsyms, so curr_map | |
742 | * points to a module and all its | |
743 | * symbols are in its kmap. Mark it as | |
744 | * loaded. | |
745 | */ | |
746 | dso__set_loaded(curr_map->dso, | |
747 | curr_map->type); | |
748 | } | |
749 | ||
750 | curr_map = map_groups__find_by_name(kmaps, | |
751 | map->type, module); | |
4e06255f | 752 | if (curr_map == NULL) { |
2f51903b | 753 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 754 | "inconsistency while looking " |
a1645ce1 | 755 | "for \"%s\" module!\n", |
23346f21 | 756 | machine->root_dir, module); |
a1645ce1 ZY |
757 | curr_map = map; |
758 | goto discard_symbol; | |
af427bf5 | 759 | } |
b7cece76 | 760 | |
a1645ce1 | 761 | if (curr_map->dso->loaded && |
23346f21 | 762 | !machine__is_default_guest(machine)) |
b7cece76 | 763 | goto discard_symbol; |
af427bf5 | 764 | } |
2e538c4a ACM |
765 | /* |
766 | * So that we look just like we get from .ko files, | |
767 | * i.e. not prelinked, relative to map->start. | |
768 | */ | |
4e06255f ACM |
769 | pos->start = curr_map->map_ip(curr_map, pos->start); |
770 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
771 | } else if (curr_map != map) { | |
2e538c4a | 772 | char dso_name[PATH_MAX]; |
aeafcbaf | 773 | struct dso *ndso; |
2e538c4a | 774 | |
d9b62aba AH |
775 | if (delta) { |
776 | /* Kernel was relocated at boot time */ | |
777 | pos->start -= delta; | |
778 | pos->end -= delta; | |
779 | } | |
780 | ||
8a953312 ACM |
781 | if (count == 0) { |
782 | curr_map = map; | |
783 | goto filter_symbol; | |
784 | } | |
785 | ||
aeafcbaf | 786 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
787 | snprintf(dso_name, sizeof(dso_name), |
788 | "[guest.kernel].%d", | |
789 | kernel_range++); | |
790 | else | |
791 | snprintf(dso_name, sizeof(dso_name), | |
792 | "[kernel].%d", | |
793 | kernel_range++); | |
2e538c4a | 794 | |
aeafcbaf ACM |
795 | ndso = dso__new(dso_name); |
796 | if (ndso == NULL) | |
2e538c4a ACM |
797 | return -1; |
798 | ||
aeafcbaf | 799 | ndso->kernel = dso->kernel; |
a1645ce1 | 800 | |
aeafcbaf | 801 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 802 | if (curr_map == NULL) { |
d3a7c489 | 803 | dso__put(ndso); |
2e538c4a ACM |
804 | return -1; |
805 | } | |
a2928c42 | 806 | |
4e06255f | 807 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 808 | map_groups__insert(kmaps, curr_map); |
2e538c4a | 809 | ++kernel_range; |
d9b62aba AH |
810 | } else if (delta) { |
811 | /* Kernel was relocated at boot time */ | |
812 | pos->start -= delta; | |
813 | pos->end -= delta; | |
2e538c4a | 814 | } |
8a953312 | 815 | filter_symbol: |
4e06255f | 816 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 817 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 818 | symbol__delete(pos); |
2e538c4a | 819 | } else { |
4e06255f ACM |
820 | if (curr_map != map) { |
821 | rb_erase(&pos->rb_node, root); | |
822 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
823 | ++moved; |
824 | } else | |
825 | ++count; | |
9974f496 | 826 | } |
a2928c42 ACM |
827 | } |
828 | ||
a1645ce1 | 829 | if (curr_map != map && |
aeafcbaf | 830 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 831 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
832 | dso__set_loaded(curr_map->dso, curr_map->type); |
833 | } | |
834 | ||
8a953312 | 835 | return count + moved; |
2e538c4a | 836 | } |
a2928c42 | 837 | |
3f067dca ACM |
838 | bool symbol__restricted_filename(const char *filename, |
839 | const char *restricted_filename) | |
ec80fde7 ACM |
840 | { |
841 | bool restricted = false; | |
842 | ||
843 | if (symbol_conf.kptr_restrict) { | |
844 | char *r = realpath(filename, NULL); | |
845 | ||
846 | if (r != NULL) { | |
847 | restricted = strcmp(r, restricted_filename) == 0; | |
848 | free(r); | |
849 | return restricted; | |
850 | } | |
851 | } | |
852 | ||
853 | return restricted; | |
854 | } | |
855 | ||
52afdaf9 AH |
856 | struct module_info { |
857 | struct rb_node rb_node; | |
858 | char *name; | |
859 | u64 start; | |
8e0cf965 AH |
860 | }; |
861 | ||
52afdaf9 | 862 | static void add_module(struct module_info *mi, struct rb_root *modules) |
8e0cf965 | 863 | { |
52afdaf9 AH |
864 | struct rb_node **p = &modules->rb_node; |
865 | struct rb_node *parent = NULL; | |
866 | struct module_info *m; | |
8e0cf965 | 867 | |
52afdaf9 AH |
868 | while (*p != NULL) { |
869 | parent = *p; | |
870 | m = rb_entry(parent, struct module_info, rb_node); | |
871 | if (strcmp(mi->name, m->name) < 0) | |
872 | p = &(*p)->rb_left; | |
873 | else | |
874 | p = &(*p)->rb_right; | |
875 | } | |
876 | rb_link_node(&mi->rb_node, parent, p); | |
877 | rb_insert_color(&mi->rb_node, modules); | |
878 | } | |
879 | ||
880 | static void delete_modules(struct rb_root *modules) | |
881 | { | |
882 | struct module_info *mi; | |
883 | struct rb_node *next = rb_first(modules); | |
884 | ||
885 | while (next) { | |
886 | mi = rb_entry(next, struct module_info, rb_node); | |
887 | next = rb_next(&mi->rb_node); | |
888 | rb_erase(&mi->rb_node, modules); | |
74cf249d | 889 | zfree(&mi->name); |
52afdaf9 AH |
890 | free(mi); |
891 | } | |
892 | } | |
893 | ||
894 | static struct module_info *find_module(const char *name, | |
895 | struct rb_root *modules) | |
896 | { | |
897 | struct rb_node *n = modules->rb_node; | |
898 | ||
899 | while (n) { | |
900 | struct module_info *m; | |
901 | int cmp; | |
902 | ||
903 | m = rb_entry(n, struct module_info, rb_node); | |
904 | cmp = strcmp(name, m->name); | |
905 | if (cmp < 0) | |
906 | n = n->rb_left; | |
907 | else if (cmp > 0) | |
908 | n = n->rb_right; | |
909 | else | |
910 | return m; | |
911 | } | |
912 | ||
913 | return NULL; | |
914 | } | |
915 | ||
916 | static int __read_proc_modules(void *arg, const char *name, u64 start) | |
917 | { | |
918 | struct rb_root *modules = arg; | |
919 | struct module_info *mi; | |
920 | ||
921 | mi = zalloc(sizeof(struct module_info)); | |
922 | if (!mi) | |
8e0cf965 AH |
923 | return -ENOMEM; |
924 | ||
52afdaf9 AH |
925 | mi->name = strdup(name); |
926 | mi->start = start; | |
8e0cf965 | 927 | |
52afdaf9 AH |
928 | if (!mi->name) { |
929 | free(mi); | |
930 | return -ENOMEM; | |
931 | } | |
932 | ||
933 | add_module(mi, modules); | |
934 | ||
935 | return 0; | |
936 | } | |
937 | ||
938 | static int read_proc_modules(const char *filename, struct rb_root *modules) | |
939 | { | |
940 | if (symbol__restricted_filename(filename, "/proc/modules")) | |
941 | return -1; | |
942 | ||
943 | if (modules__parse(filename, modules, __read_proc_modules)) { | |
944 | delete_modules(modules); | |
945 | return -1; | |
946 | } | |
8e0cf965 AH |
947 | |
948 | return 0; | |
949 | } | |
950 | ||
fc1b691d AH |
951 | int compare_proc_modules(const char *from, const char *to) |
952 | { | |
953 | struct rb_root from_modules = RB_ROOT; | |
954 | struct rb_root to_modules = RB_ROOT; | |
955 | struct rb_node *from_node, *to_node; | |
956 | struct module_info *from_m, *to_m; | |
957 | int ret = -1; | |
958 | ||
959 | if (read_proc_modules(from, &from_modules)) | |
960 | return -1; | |
961 | ||
962 | if (read_proc_modules(to, &to_modules)) | |
963 | goto out_delete_from; | |
964 | ||
965 | from_node = rb_first(&from_modules); | |
966 | to_node = rb_first(&to_modules); | |
967 | while (from_node) { | |
968 | if (!to_node) | |
969 | break; | |
970 | ||
971 | from_m = rb_entry(from_node, struct module_info, rb_node); | |
972 | to_m = rb_entry(to_node, struct module_info, rb_node); | |
973 | ||
974 | if (from_m->start != to_m->start || | |
975 | strcmp(from_m->name, to_m->name)) | |
976 | break; | |
977 | ||
978 | from_node = rb_next(from_node); | |
979 | to_node = rb_next(to_node); | |
980 | } | |
981 | ||
982 | if (!from_node && !to_node) | |
983 | ret = 0; | |
984 | ||
985 | delete_modules(&to_modules); | |
986 | out_delete_from: | |
987 | delete_modules(&from_modules); | |
988 | ||
989 | return ret; | |
990 | } | |
991 | ||
52afdaf9 AH |
992 | static int do_validate_kcore_modules(const char *filename, struct map *map, |
993 | struct map_groups *kmaps) | |
994 | { | |
995 | struct rb_root modules = RB_ROOT; | |
996 | struct map *old_map; | |
997 | int err; | |
998 | ||
999 | err = read_proc_modules(filename, &modules); | |
1000 | if (err) | |
1001 | return err; | |
1002 | ||
1003 | old_map = map_groups__first(kmaps, map->type); | |
1004 | while (old_map) { | |
1005 | struct map *next = map_groups__next(old_map); | |
1006 | struct module_info *mi; | |
1007 | ||
1008 | if (old_map == map || old_map->start == map->start) { | |
1009 | /* The kernel map */ | |
1010 | old_map = next; | |
1011 | continue; | |
1012 | } | |
1013 | ||
1014 | /* Module must be in memory at the same address */ | |
1015 | mi = find_module(old_map->dso->short_name, &modules); | |
1016 | if (!mi || mi->start != old_map->start) { | |
1017 | err = -EINVAL; | |
1018 | goto out; | |
1019 | } | |
1020 | ||
1021 | old_map = next; | |
1022 | } | |
1023 | out: | |
1024 | delete_modules(&modules); | |
1025 | return err; | |
1026 | } | |
1027 | ||
8e0cf965 | 1028 | /* |
52afdaf9 | 1029 | * If kallsyms is referenced by name then we look for filename in the same |
8e0cf965 AH |
1030 | * directory. |
1031 | */ | |
52afdaf9 AH |
1032 | static bool filename_from_kallsyms_filename(char *filename, |
1033 | const char *base_name, | |
1034 | const char *kallsyms_filename) | |
8e0cf965 AH |
1035 | { |
1036 | char *name; | |
1037 | ||
52afdaf9 AH |
1038 | strcpy(filename, kallsyms_filename); |
1039 | name = strrchr(filename, '/'); | |
8e0cf965 AH |
1040 | if (!name) |
1041 | return false; | |
1042 | ||
52afdaf9 AH |
1043 | name += 1; |
1044 | ||
1045 | if (!strcmp(name, "kallsyms")) { | |
1046 | strcpy(name, base_name); | |
8e0cf965 AH |
1047 | return true; |
1048 | } | |
1049 | ||
1050 | return false; | |
1051 | } | |
1052 | ||
52afdaf9 AH |
1053 | static int validate_kcore_modules(const char *kallsyms_filename, |
1054 | struct map *map) | |
1055 | { | |
ba92732e | 1056 | struct map_groups *kmaps = map__kmaps(map); |
52afdaf9 AH |
1057 | char modules_filename[PATH_MAX]; |
1058 | ||
ba92732e WN |
1059 | if (!kmaps) |
1060 | return -EINVAL; | |
1061 | ||
52afdaf9 AH |
1062 | if (!filename_from_kallsyms_filename(modules_filename, "modules", |
1063 | kallsyms_filename)) | |
1064 | return -EINVAL; | |
1065 | ||
1066 | if (do_validate_kcore_modules(modules_filename, map, kmaps)) | |
1067 | return -EINVAL; | |
1068 | ||
1069 | return 0; | |
1070 | } | |
1071 | ||
a00d28cb AH |
1072 | static int validate_kcore_addresses(const char *kallsyms_filename, |
1073 | struct map *map) | |
1074 | { | |
1075 | struct kmap *kmap = map__kmap(map); | |
1076 | ||
ba92732e WN |
1077 | if (!kmap) |
1078 | return -EINVAL; | |
1079 | ||
a00d28cb AH |
1080 | if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) { |
1081 | u64 start; | |
1082 | ||
1083 | start = kallsyms__get_function_start(kallsyms_filename, | |
1084 | kmap->ref_reloc_sym->name); | |
1085 | if (start != kmap->ref_reloc_sym->addr) | |
1086 | return -EINVAL; | |
1087 | } | |
1088 | ||
1089 | return validate_kcore_modules(kallsyms_filename, map); | |
1090 | } | |
1091 | ||
52afdaf9 AH |
1092 | struct kcore_mapfn_data { |
1093 | struct dso *dso; | |
1094 | enum map_type type; | |
1095 | struct list_head maps; | |
1096 | }; | |
1097 | ||
1098 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
1099 | { | |
1100 | struct kcore_mapfn_data *md = data; | |
1101 | struct map *map; | |
1102 | ||
1103 | map = map__new2(start, md->dso, md->type); | |
1104 | if (map == NULL) | |
1105 | return -ENOMEM; | |
1106 | ||
1107 | map->end = map->start + len; | |
1108 | map->pgoff = pgoff; | |
1109 | ||
1110 | list_add(&map->node, &md->maps); | |
1111 | ||
1112 | return 0; | |
1113 | } | |
1114 | ||
8e0cf965 AH |
1115 | static int dso__load_kcore(struct dso *dso, struct map *map, |
1116 | const char *kallsyms_filename) | |
1117 | { | |
ba92732e WN |
1118 | struct map_groups *kmaps = map__kmaps(map); |
1119 | struct machine *machine; | |
8e0cf965 AH |
1120 | struct kcore_mapfn_data md; |
1121 | struct map *old_map, *new_map, *replacement_map = NULL; | |
1122 | bool is_64_bit; | |
1123 | int err, fd; | |
1124 | char kcore_filename[PATH_MAX]; | |
1125 | struct symbol *sym; | |
1126 | ||
ba92732e WN |
1127 | if (!kmaps) |
1128 | return -EINVAL; | |
1129 | ||
1130 | machine = kmaps->machine; | |
1131 | ||
8e0cf965 AH |
1132 | /* This function requires that the map is the kernel map */ |
1133 | if (map != machine->vmlinux_maps[map->type]) | |
1134 | return -EINVAL; | |
1135 | ||
52afdaf9 AH |
1136 | if (!filename_from_kallsyms_filename(kcore_filename, "kcore", |
1137 | kallsyms_filename)) | |
1138 | return -EINVAL; | |
1139 | ||
a00d28cb AH |
1140 | /* Modules and kernel must be present at their original addresses */ |
1141 | if (validate_kcore_addresses(kallsyms_filename, map)) | |
8e0cf965 AH |
1142 | return -EINVAL; |
1143 | ||
1144 | md.dso = dso; | |
1145 | md.type = map->type; | |
1146 | INIT_LIST_HEAD(&md.maps); | |
1147 | ||
1148 | fd = open(kcore_filename, O_RDONLY); | |
36c8bb56 | 1149 | if (fd < 0) { |
133de940 AH |
1150 | pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n", |
1151 | kcore_filename); | |
8e0cf965 | 1152 | return -EINVAL; |
36c8bb56 | 1153 | } |
8e0cf965 AH |
1154 | |
1155 | /* Read new maps into temporary lists */ | |
1156 | err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md, | |
1157 | &is_64_bit); | |
1158 | if (err) | |
1159 | goto out_err; | |
c6d8f2a4 | 1160 | dso->is_64_bit = is_64_bit; |
8e0cf965 AH |
1161 | |
1162 | if (list_empty(&md.maps)) { | |
1163 | err = -EINVAL; | |
1164 | goto out_err; | |
1165 | } | |
1166 | ||
1167 | /* Remove old maps */ | |
1168 | old_map = map_groups__first(kmaps, map->type); | |
1169 | while (old_map) { | |
1170 | struct map *next = map_groups__next(old_map); | |
1171 | ||
1172 | if (old_map != map) | |
1173 | map_groups__remove(kmaps, old_map); | |
1174 | old_map = next; | |
1175 | } | |
1176 | ||
1177 | /* Find the kernel map using the first symbol */ | |
1178 | sym = dso__first_symbol(dso, map->type); | |
1179 | list_for_each_entry(new_map, &md.maps, node) { | |
1180 | if (sym && sym->start >= new_map->start && | |
1181 | sym->start < new_map->end) { | |
1182 | replacement_map = new_map; | |
1183 | break; | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | if (!replacement_map) | |
1188 | replacement_map = list_entry(md.maps.next, struct map, node); | |
1189 | ||
1190 | /* Add new maps */ | |
1191 | while (!list_empty(&md.maps)) { | |
1192 | new_map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1193 | list_del_init(&new_map->node); |
8e0cf965 AH |
1194 | if (new_map == replacement_map) { |
1195 | map->start = new_map->start; | |
1196 | map->end = new_map->end; | |
1197 | map->pgoff = new_map->pgoff; | |
1198 | map->map_ip = new_map->map_ip; | |
1199 | map->unmap_ip = new_map->unmap_ip; | |
8e0cf965 | 1200 | /* Ensure maps are correctly ordered */ |
84c2cafa | 1201 | map__get(map); |
8e0cf965 AH |
1202 | map_groups__remove(kmaps, map); |
1203 | map_groups__insert(kmaps, map); | |
84c2cafa | 1204 | map__put(map); |
8e0cf965 AH |
1205 | } else { |
1206 | map_groups__insert(kmaps, new_map); | |
1207 | } | |
84c2cafa ACM |
1208 | |
1209 | map__put(new_map); | |
8e0cf965 AH |
1210 | } |
1211 | ||
1212 | /* | |
1213 | * Set the data type and long name so that kcore can be read via | |
1214 | * dso__data_read_addr(). | |
1215 | */ | |
1216 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
5f70619d | 1217 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE; |
8e0cf965 | 1218 | else |
5f70619d | 1219 | dso->binary_type = DSO_BINARY_TYPE__KCORE; |
7e155d4d | 1220 | dso__set_long_name(dso, strdup(kcore_filename), true); |
8e0cf965 AH |
1221 | |
1222 | close(fd); | |
1223 | ||
1224 | if (map->type == MAP__FUNCTION) | |
1225 | pr_debug("Using %s for kernel object code\n", kcore_filename); | |
1226 | else | |
1227 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
1228 | ||
1229 | return 0; | |
1230 | ||
1231 | out_err: | |
1232 | while (!list_empty(&md.maps)) { | |
1233 | map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1234 | list_del_init(&map->node); |
84c2cafa | 1235 | map__put(map); |
8e0cf965 AH |
1236 | } |
1237 | close(fd); | |
1238 | return -EINVAL; | |
1239 | } | |
1240 | ||
d9b62aba AH |
1241 | /* |
1242 | * If the kernel is relocated at boot time, kallsyms won't match. Compute the | |
1243 | * delta based on the relocation reference symbol. | |
1244 | */ | |
1245 | static int kallsyms__delta(struct map *map, const char *filename, u64 *delta) | |
1246 | { | |
1247 | struct kmap *kmap = map__kmap(map); | |
1248 | u64 addr; | |
1249 | ||
ba92732e WN |
1250 | if (!kmap) |
1251 | return -1; | |
1252 | ||
d9b62aba AH |
1253 | if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name) |
1254 | return 0; | |
1255 | ||
1256 | addr = kallsyms__get_function_start(filename, | |
1257 | kmap->ref_reloc_sym->name); | |
1258 | if (!addr) | |
1259 | return -1; | |
1260 | ||
1261 | *delta = addr - kmap->ref_reloc_sym->addr; | |
1262 | return 0; | |
1263 | } | |
1264 | ||
aeafcbaf | 1265 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 1266 | struct map *map, symbol_filter_t filter) |
2e538c4a | 1267 | { |
d9b62aba AH |
1268 | u64 delta = 0; |
1269 | ||
ec80fde7 ACM |
1270 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1271 | return -1; | |
1272 | ||
aeafcbaf | 1273 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
1274 | return -1; |
1275 | ||
d9b62aba AH |
1276 | if (kallsyms__delta(map, filename, &delta)) |
1277 | return -1; | |
1278 | ||
694bf407 | 1279 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
1280 | symbols__fixup_end(&dso->symbols[map->type]); |
1281 | ||
aeafcbaf | 1282 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 1283 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 1284 | else |
44f24cb3 | 1285 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 1286 | |
8e0cf965 AH |
1287 | if (!dso__load_kcore(dso, map, filename)) |
1288 | return dso__split_kallsyms_for_kcore(dso, map, filter); | |
1289 | else | |
d9b62aba | 1290 | return dso__split_kallsyms(dso, map, delta, filter); |
af427bf5 ACM |
1291 | } |
1292 | ||
aeafcbaf | 1293 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 1294 | symbol_filter_t filter) |
80d496be PE |
1295 | { |
1296 | char *line = NULL; | |
1297 | size_t n; | |
1298 | FILE *file; | |
1299 | int nr_syms = 0; | |
1300 | ||
aeafcbaf | 1301 | file = fopen(dso->long_name, "r"); |
80d496be PE |
1302 | if (file == NULL) |
1303 | goto out_failure; | |
1304 | ||
1305 | while (!feof(file)) { | |
9cffa8d5 | 1306 | u64 start, size; |
80d496be PE |
1307 | struct symbol *sym; |
1308 | int line_len, len; | |
1309 | ||
1310 | line_len = getline(&line, &n, file); | |
1311 | if (line_len < 0) | |
1312 | break; | |
1313 | ||
1314 | if (!line) | |
1315 | goto out_failure; | |
1316 | ||
1317 | line[--line_len] = '\0'; /* \n */ | |
1318 | ||
1319 | len = hex2u64(line, &start); | |
1320 | ||
1321 | len++; | |
1322 | if (len + 2 >= line_len) | |
1323 | continue; | |
1324 | ||
1325 | len += hex2u64(line + len, &size); | |
1326 | ||
1327 | len++; | |
1328 | if (len + 2 >= line_len) | |
1329 | continue; | |
1330 | ||
c408fedf | 1331 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
1332 | |
1333 | if (sym == NULL) | |
1334 | goto out_delete_line; | |
1335 | ||
439d473b | 1336 | if (filter && filter(map, sym)) |
00a192b3 | 1337 | symbol__delete(sym); |
80d496be | 1338 | else { |
aeafcbaf | 1339 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
1340 | nr_syms++; |
1341 | } | |
1342 | } | |
1343 | ||
1344 | free(line); | |
1345 | fclose(file); | |
1346 | ||
1347 | return nr_syms; | |
1348 | ||
1349 | out_delete_line: | |
1350 | free(line); | |
1351 | out_failure: | |
1352 | return -1; | |
1353 | } | |
1354 | ||
1029f9fe NK |
1355 | static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod, |
1356 | enum dso_binary_type type) | |
1357 | { | |
1358 | switch (type) { | |
1359 | case DSO_BINARY_TYPE__JAVA_JIT: | |
1360 | case DSO_BINARY_TYPE__DEBUGLINK: | |
1361 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
1362 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
1363 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
1364 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: | |
1365 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: | |
1366 | return !kmod && dso->kernel == DSO_TYPE_USER; | |
1367 | ||
1368 | case DSO_BINARY_TYPE__KALLSYMS: | |
1369 | case DSO_BINARY_TYPE__VMLINUX: | |
1370 | case DSO_BINARY_TYPE__KCORE: | |
1371 | return dso->kernel == DSO_TYPE_KERNEL; | |
1372 | ||
1373 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
1374 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
1375 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
1376 | return dso->kernel == DSO_TYPE_GUEST_KERNEL; | |
1377 | ||
1378 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 1379 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
1029f9fe | 1380 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: |
c00c48fc | 1381 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
1029f9fe NK |
1382 | /* |
1383 | * kernel modules know their symtab type - it's set when | |
9f2de315 | 1384 | * creating a module dso in machine__findnew_module_map(). |
1029f9fe NK |
1385 | */ |
1386 | return kmod && dso->symtab_type == type; | |
1387 | ||
1388 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
1389 | return true; | |
1390 | ||
1391 | case DSO_BINARY_TYPE__NOT_FOUND: | |
1392 | default: | |
1393 | return false; | |
1394 | } | |
1395 | } | |
1396 | ||
aeafcbaf | 1397 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1398 | { |
c338aee8 | 1399 | char *name; |
a2928c42 | 1400 | int ret = -1; |
44f24cb3 | 1401 | u_int i; |
23346f21 | 1402 | struct machine *machine; |
44f24cb3 | 1403 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1404 | int ss_pos = 0; |
1405 | struct symsrc ss_[2]; | |
1406 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
1029f9fe | 1407 | bool kmod; |
5baecbcd | 1408 | unsigned char build_id[BUILD_ID_SIZE]; |
a2928c42 | 1409 | |
4a936edc NK |
1410 | pthread_mutex_lock(&dso->lock); |
1411 | ||
1412 | /* check again under the dso->lock */ | |
1413 | if (dso__loaded(dso, map->type)) { | |
1414 | ret = 1; | |
1415 | goto out; | |
1416 | } | |
66bd8424 | 1417 | |
4a936edc NK |
1418 | if (dso->kernel) { |
1419 | if (dso->kernel == DSO_TYPE_KERNEL) | |
1420 | ret = dso__load_kernel_sym(dso, map, filter); | |
1421 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1422 | ret = dso__load_guest_kernel_sym(dso, map, filter); | |
1423 | ||
1424 | goto out; | |
1425 | } | |
a1645ce1 | 1426 | |
23346f21 ACM |
1427 | if (map->groups && map->groups->machine) |
1428 | machine = map->groups->machine; | |
a1645ce1 | 1429 | else |
23346f21 | 1430 | machine = NULL; |
c338aee8 | 1431 | |
aeafcbaf | 1432 | dso->adjust_symbols = 0; |
f5812a7a | 1433 | |
aeafcbaf | 1434 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1435 | struct stat st; |
1436 | ||
e9b52ef2 | 1437 | if (lstat(dso->name, &st) < 0) |
4a936edc | 1438 | goto out; |
981c1252 | 1439 | |
2059fc7a | 1440 | if (!symbol_conf.force && st.st_uid && (st.st_uid != geteuid())) { |
981c1252 | 1441 | pr_warning("File %s not owned by current user or root, " |
2059fc7a | 1442 | "ignoring it (use -f to override).\n", dso->name); |
4a936edc | 1443 | goto out; |
981c1252 PE |
1444 | } |
1445 | ||
aeafcbaf | 1446 | ret = dso__load_perf_map(dso, map, filter); |
44f24cb3 JO |
1447 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1448 | DSO_BINARY_TYPE__NOT_FOUND; | |
4a936edc | 1449 | goto out; |
94cb9e38 ACM |
1450 | } |
1451 | ||
44f24cb3 JO |
1452 | if (machine) |
1453 | root_dir = machine->root_dir; | |
1454 | ||
164c800e DA |
1455 | name = malloc(PATH_MAX); |
1456 | if (!name) | |
4a936edc | 1457 | goto out; |
164c800e | 1458 | |
1029f9fe | 1459 | kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || |
c00c48fc NK |
1460 | dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || |
1461 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE || | |
1462 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
1029f9fe | 1463 | |
5baecbcd DK |
1464 | |
1465 | /* | |
1466 | * Read the build id if possible. This is required for | |
1467 | * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work | |
1468 | */ | |
40c4a0f9 | 1469 | if (filename__read_build_id(dso->long_name, build_id, BUILD_ID_SIZE) > 0) |
5baecbcd DK |
1470 | dso__set_build_id(dso, build_id); |
1471 | ||
1029f9fe NK |
1472 | /* |
1473 | * Iterate over candidate debug images. | |
3aafe5ae CS |
1474 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1475 | * and/or opd section) for processing. | |
6da80ce8 | 1476 | */ |
44f24cb3 | 1477 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1478 | struct symsrc *ss = &ss_[ss_pos]; |
1479 | bool next_slot = false; | |
6da80ce8 | 1480 | |
005f9294 | 1481 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1482 | |
1029f9fe NK |
1483 | if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type)) |
1484 | continue; | |
1485 | ||
ee4e9625 ACM |
1486 | if (dso__read_binary_type_filename(dso, symtab_type, |
1487 | root_dir, name, PATH_MAX)) | |
44f24cb3 | 1488 | continue; |
6da80ce8 DM |
1489 | |
1490 | /* Name is now the name of the next image to try */ | |
3aafe5ae | 1491 | if (symsrc__init(ss, dso, name, symtab_type) < 0) |
6da80ce8 | 1492 | continue; |
a2928c42 | 1493 | |
3aafe5ae CS |
1494 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1495 | syms_ss = ss; | |
1496 | next_slot = true; | |
0058aef6 AH |
1497 | if (!dso->symsrc_filename) |
1498 | dso->symsrc_filename = strdup(name); | |
d26cd12b CS |
1499 | } |
1500 | ||
3aafe5ae CS |
1501 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1502 | runtime_ss = ss; | |
1503 | next_slot = true; | |
a44f605b | 1504 | } |
a2928c42 | 1505 | |
3aafe5ae CS |
1506 | if (next_slot) { |
1507 | ss_pos++; | |
33ff581e | 1508 | |
3aafe5ae CS |
1509 | if (syms_ss && runtime_ss) |
1510 | break; | |
98e9f03b NK |
1511 | } else { |
1512 | symsrc__destroy(ss); | |
6da80ce8 | 1513 | } |
3aafe5ae | 1514 | |
a25e46c4 | 1515 | } |
6da80ce8 | 1516 | |
3aafe5ae CS |
1517 | if (!runtime_ss && !syms_ss) |
1518 | goto out_free; | |
1519 | ||
1520 | if (runtime_ss && !syms_ss) { | |
1521 | syms_ss = runtime_ss; | |
1522 | } | |
1523 | ||
1524 | /* We'll have to hope for the best */ | |
1525 | if (!runtime_ss && syms_ss) | |
1526 | runtime_ss = syms_ss; | |
1527 | ||
1029f9fe NK |
1528 | if (syms_ss) |
1529 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, kmod); | |
1530 | else | |
3aafe5ae CS |
1531 | ret = -1; |
1532 | ||
f47b58b7 | 1533 | if (ret > 0) { |
3aafe5ae CS |
1534 | int nr_plt; |
1535 | ||
1536 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map, filter); | |
1537 | if (nr_plt > 0) | |
1538 | ret += nr_plt; | |
60e4b10c ACM |
1539 | } |
1540 | ||
3aafe5ae CS |
1541 | for (; ss_pos > 0; ss_pos--) |
1542 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1543 | out_free: | |
a2928c42 | 1544 | free(name); |
aeafcbaf | 1545 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
4a936edc NK |
1546 | ret = 0; |
1547 | out: | |
1548 | dso__set_loaded(dso, map->type); | |
1549 | pthread_mutex_unlock(&dso->lock); | |
1550 | ||
a2928c42 ACM |
1551 | return ret; |
1552 | } | |
1553 | ||
aeafcbaf | 1554 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1555 | enum map_type type, const char *name) |
439d473b | 1556 | { |
1eee78ae | 1557 | struct maps *maps = &mg->maps[type]; |
4bb7123d | 1558 | struct map *map; |
439d473b | 1559 | |
6a2ffcdd ACM |
1560 | pthread_rwlock_rdlock(&maps->lock); |
1561 | ||
4bb7123d | 1562 | for (map = maps__first(maps); map; map = map__next(map)) { |
b7cece76 | 1563 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
6a2ffcdd | 1564 | goto out_unlock; |
439d473b ACM |
1565 | } |
1566 | ||
6a2ffcdd ACM |
1567 | map = NULL; |
1568 | ||
1569 | out_unlock: | |
1570 | pthread_rwlock_unlock(&maps->lock); | |
1571 | return map; | |
439d473b ACM |
1572 | } |
1573 | ||
aeafcbaf | 1574 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
5230fb7d ACM |
1575 | const char *vmlinux, bool vmlinux_allocated, |
1576 | symbol_filter_t filter) | |
a2928c42 | 1577 | { |
b68e2f91 CS |
1578 | int err = -1; |
1579 | struct symsrc ss; | |
ec5761ea | 1580 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1581 | enum dso_binary_type symtab_type; |
a2928c42 | 1582 | |
5698d2c9 NK |
1583 | if (vmlinux[0] == '/') |
1584 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1585 | else | |
972f393b | 1586 | symbol__join_symfs(symfs_vmlinux, vmlinux); |
a2928c42 | 1587 | |
21ea4539 | 1588 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1589 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1590 | else |
005f9294 | 1591 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1592 | |
005f9294 | 1593 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1594 | return -1; |
1595 | ||
261360b6 | 1596 | err = dso__load_sym(dso, map, &ss, &ss, filter, 0); |
b68e2f91 | 1597 | symsrc__destroy(&ss); |
a2928c42 | 1598 | |
515850e4 | 1599 | if (err > 0) { |
39b12f78 | 1600 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
5f70619d | 1601 | dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
39b12f78 | 1602 | else |
5f70619d | 1603 | dso->binary_type = DSO_BINARY_TYPE__VMLINUX; |
bf4414ae | 1604 | dso__set_long_name(dso, vmlinux, vmlinux_allocated); |
515850e4 | 1605 | dso__set_loaded(dso, map->type); |
ec5761ea | 1606 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1607 | } |
3846df2e | 1608 | |
a2928c42 ACM |
1609 | return err; |
1610 | } | |
1611 | ||
aeafcbaf | 1612 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 1613 | symbol_filter_t filter) |
a19afe46 ACM |
1614 | { |
1615 | int i, err = 0; | |
00dc8657 | 1616 | char *filename = NULL; |
a19afe46 | 1617 | |
dc38218e ACM |
1618 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", |
1619 | vmlinux_path__nr_entries + 1); | |
1620 | ||
1621 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
1622 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], false, filter); | |
1623 | if (err > 0) | |
1624 | goto out; | |
1625 | } | |
1626 | ||
00dc8657 NK |
1627 | if (!symbol_conf.ignore_vmlinux_buildid) |
1628 | filename = dso__build_id_filename(dso, NULL, 0); | |
5ad90e4e | 1629 | if (filename != NULL) { |
5230fb7d ACM |
1630 | err = dso__load_vmlinux(dso, map, filename, true, filter); |
1631 | if (err > 0) | |
5ad90e4e | 1632 | goto out; |
5ad90e4e ACM |
1633 | free(filename); |
1634 | } | |
5ad90e4e | 1635 | out: |
a19afe46 ACM |
1636 | return err; |
1637 | } | |
1638 | ||
0544d422 AH |
1639 | static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz) |
1640 | { | |
1641 | char kallsyms_filename[PATH_MAX]; | |
1642 | struct dirent *dent; | |
1643 | int ret = -1; | |
1644 | DIR *d; | |
1645 | ||
1646 | d = opendir(dir); | |
1647 | if (!d) | |
1648 | return -1; | |
1649 | ||
1650 | while (1) { | |
1651 | dent = readdir(d); | |
1652 | if (!dent) | |
1653 | break; | |
1654 | if (dent->d_type != DT_DIR) | |
1655 | continue; | |
1656 | scnprintf(kallsyms_filename, sizeof(kallsyms_filename), | |
1657 | "%s/%s/kallsyms", dir, dent->d_name); | |
a00d28cb | 1658 | if (!validate_kcore_addresses(kallsyms_filename, map)) { |
0544d422 AH |
1659 | strlcpy(dir, kallsyms_filename, dir_sz); |
1660 | ret = 0; | |
1661 | break; | |
1662 | } | |
1663 | } | |
1664 | ||
1665 | closedir(d); | |
1666 | ||
1667 | return ret; | |
1668 | } | |
1669 | ||
1670 | static char *dso__find_kallsyms(struct dso *dso, struct map *map) | |
1671 | { | |
1672 | u8 host_build_id[BUILD_ID_SIZE]; | |
1673 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
1674 | bool is_host = false; | |
1675 | char path[PATH_MAX]; | |
1676 | ||
1677 | if (!dso->has_build_id) { | |
1678 | /* | |
1679 | * Last resort, if we don't have a build-id and couldn't find | |
1680 | * any vmlinux file, try the running kernel kallsyms table. | |
1681 | */ | |
1682 | goto proc_kallsyms; | |
1683 | } | |
1684 | ||
1685 | if (sysfs__read_build_id("/sys/kernel/notes", host_build_id, | |
1686 | sizeof(host_build_id)) == 0) | |
1687 | is_host = dso__build_id_equal(dso, host_build_id); | |
1688 | ||
1689 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
1690 | ||
449867e3 AH |
1691 | scnprintf(path, sizeof(path), "%s/[kernel.kcore]/%s", buildid_dir, |
1692 | sbuild_id); | |
1693 | ||
0544d422 AH |
1694 | /* Use /proc/kallsyms if possible */ |
1695 | if (is_host) { | |
1696 | DIR *d; | |
1697 | int fd; | |
1698 | ||
1699 | /* If no cached kcore go with /proc/kallsyms */ | |
0544d422 AH |
1700 | d = opendir(path); |
1701 | if (!d) | |
1702 | goto proc_kallsyms; | |
1703 | closedir(d); | |
1704 | ||
1705 | /* | |
1706 | * Do not check the build-id cache, until we know we cannot use | |
1707 | * /proc/kcore. | |
1708 | */ | |
1709 | fd = open("/proc/kcore", O_RDONLY); | |
1710 | if (fd != -1) { | |
1711 | close(fd); | |
1712 | /* If module maps match go with /proc/kallsyms */ | |
a00d28cb | 1713 | if (!validate_kcore_addresses("/proc/kallsyms", map)) |
0544d422 AH |
1714 | goto proc_kallsyms; |
1715 | } | |
1716 | ||
1717 | /* Find kallsyms in build-id cache with kcore */ | |
1718 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1719 | return strdup(path); | |
1720 | ||
1721 | goto proc_kallsyms; | |
1722 | } | |
1723 | ||
449867e3 AH |
1724 | /* Find kallsyms in build-id cache with kcore */ |
1725 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1726 | return strdup(path); | |
1727 | ||
0544d422 AH |
1728 | scnprintf(path, sizeof(path), "%s/[kernel.kallsyms]/%s", |
1729 | buildid_dir, sbuild_id); | |
1730 | ||
1731 | if (access(path, F_OK)) { | |
1732 | pr_err("No kallsyms or vmlinux with build-id %s was found\n", | |
1733 | sbuild_id); | |
1734 | return NULL; | |
1735 | } | |
1736 | ||
1737 | return strdup(path); | |
1738 | ||
1739 | proc_kallsyms: | |
1740 | return strdup("/proc/kallsyms"); | |
1741 | } | |
1742 | ||
aeafcbaf | 1743 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 1744 | symbol_filter_t filter) |
a827c875 | 1745 | { |
cc612d81 | 1746 | int err; |
9e201442 ACM |
1747 | const char *kallsyms_filename = NULL; |
1748 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1749 | /* |
b226a5a7 DA |
1750 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1751 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1752 | * |
1753 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1754 | * build-id, or if the user specifies the wrong path to the right | |
1755 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1756 | * x86_86 one, on the machine where analysis is being performed, say), | |
1757 | * or worse, /proc/kallsyms. | |
1758 | * | |
1759 | * If the specified file _has_ a build-id and there is a build-id | |
1760 | * section in the perf.data file, we will still do the expected | |
1761 | * validation in dso__load_vmlinux and will bail out if they don't | |
1762 | * match. | |
1763 | */ | |
b226a5a7 DA |
1764 | if (symbol_conf.kallsyms_name != NULL) { |
1765 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1766 | goto do_kallsyms; | |
1767 | } | |
1768 | ||
fc2be696 | 1769 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
5230fb7d ACM |
1770 | return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, |
1771 | false, filter); | |
dc8d6ab2 | 1772 | } |
cc612d81 | 1773 | |
fc2be696 | 1774 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
aeafcbaf | 1775 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 | 1776 | if (err > 0) |
39b12f78 | 1777 | return err; |
cc612d81 ACM |
1778 | } |
1779 | ||
ec5761ea DA |
1780 | /* do not try local files if a symfs was given */ |
1781 | if (symbol_conf.symfs[0] != 0) | |
1782 | return -1; | |
1783 | ||
0544d422 AH |
1784 | kallsyms_allocated_filename = dso__find_kallsyms(dso, map); |
1785 | if (!kallsyms_allocated_filename) | |
1786 | return -1; | |
19fc2ded | 1787 | |
0544d422 | 1788 | kallsyms_filename = kallsyms_allocated_filename; |
439d473b | 1789 | |
cc612d81 | 1790 | do_kallsyms: |
aeafcbaf | 1791 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
1792 | if (err > 0) |
1793 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1794 | free(kallsyms_allocated_filename); |
439d473b | 1795 | |
8e0cf965 | 1796 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1797 | dso->binary_type = DSO_BINARY_TYPE__KALLSYMS; |
bf4414ae | 1798 | dso__set_long_name(dso, "[kernel.kallsyms]", false); |
6a4694a4 ACM |
1799 | map__fixup_start(map); |
1800 | map__fixup_end(map); | |
439d473b | 1801 | } |
94cb9e38 | 1802 | |
a827c875 ACM |
1803 | return err; |
1804 | } | |
1805 | ||
aeafcbaf ACM |
1806 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
1807 | symbol_filter_t filter) | |
a1645ce1 ZY |
1808 | { |
1809 | int err; | |
1810 | const char *kallsyms_filename = NULL; | |
23346f21 | 1811 | struct machine *machine; |
a1645ce1 ZY |
1812 | char path[PATH_MAX]; |
1813 | ||
1814 | if (!map->groups) { | |
1815 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1816 | return -1; | |
1817 | } | |
23346f21 | 1818 | machine = map->groups->machine; |
a1645ce1 | 1819 | |
23346f21 | 1820 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1821 | /* |
1822 | * if the user specified a vmlinux filename, use it and only | |
1823 | * it, reporting errors to the user if it cannot be used. | |
1824 | * Or use file guest_kallsyms inputted by user on commandline | |
1825 | */ | |
1826 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1827 | err = dso__load_vmlinux(dso, map, |
5230fb7d ACM |
1828 | symbol_conf.default_guest_vmlinux_name, |
1829 | false, filter); | |
39b12f78 | 1830 | return err; |
a1645ce1 ZY |
1831 | } |
1832 | ||
1833 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1834 | if (!kallsyms_filename) | |
1835 | return -1; | |
1836 | } else { | |
23346f21 | 1837 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1838 | kallsyms_filename = path; |
1839 | } | |
1840 | ||
aeafcbaf | 1841 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
8e0cf965 | 1842 | if (err > 0) |
39b12f78 | 1843 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 1844 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1845 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
39b12f78 | 1846 | machine__mmap_name(machine, path, sizeof(path)); |
7e155d4d | 1847 | dso__set_long_name(dso, strdup(path), true); |
a1645ce1 ZY |
1848 | map__fixup_start(map); |
1849 | map__fixup_end(map); | |
1850 | } | |
1851 | ||
1852 | return err; | |
1853 | } | |
cd84c2ac | 1854 | |
cc612d81 ACM |
1855 | static void vmlinux_path__exit(void) |
1856 | { | |
04662523 ACM |
1857 | while (--vmlinux_path__nr_entries >= 0) |
1858 | zfree(&vmlinux_path[vmlinux_path__nr_entries]); | |
c4f03547 | 1859 | vmlinux_path__nr_entries = 0; |
cc612d81 | 1860 | |
04662523 | 1861 | zfree(&vmlinux_path); |
cc612d81 ACM |
1862 | } |
1863 | ||
aac48647 ET |
1864 | static const char * const vmlinux_paths[] = { |
1865 | "vmlinux", | |
1866 | "/boot/vmlinux" | |
1867 | }; | |
1868 | ||
1869 | static const char * const vmlinux_paths_upd[] = { | |
1870 | "/boot/vmlinux-%s", | |
1871 | "/usr/lib/debug/boot/vmlinux-%s", | |
1872 | "/lib/modules/%s/build/vmlinux", | |
f55ae954 ET |
1873 | "/usr/lib/debug/lib/modules/%s/vmlinux", |
1874 | "/usr/lib/debug/boot/vmlinux-%s.debug" | |
aac48647 ET |
1875 | }; |
1876 | ||
1877 | static int vmlinux_path__add(const char *new_entry) | |
1878 | { | |
1879 | vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry); | |
1880 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1881 | return -1; | |
1882 | ++vmlinux_path__nr_entries; | |
1883 | ||
1884 | return 0; | |
1885 | } | |
1886 | ||
ce80d3be | 1887 | static int vmlinux_path__init(struct perf_env *env) |
cc612d81 ACM |
1888 | { |
1889 | struct utsname uts; | |
1890 | char bf[PATH_MAX]; | |
0a7e6d1b | 1891 | char *kernel_version; |
aac48647 | 1892 | unsigned int i; |
cc612d81 | 1893 | |
aac48647 ET |
1894 | vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) + |
1895 | ARRAY_SIZE(vmlinux_paths_upd))); | |
cc612d81 ACM |
1896 | if (vmlinux_path == NULL) |
1897 | return -1; | |
1898 | ||
aac48647 ET |
1899 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++) |
1900 | if (vmlinux_path__add(vmlinux_paths[i]) < 0) | |
1901 | goto out_fail; | |
ec5761ea | 1902 | |
0a7e6d1b | 1903 | /* only try kernel version if no symfs was given */ |
ec5761ea DA |
1904 | if (symbol_conf.symfs[0] != 0) |
1905 | return 0; | |
1906 | ||
0a7e6d1b NK |
1907 | if (env) { |
1908 | kernel_version = env->os_release; | |
1909 | } else { | |
1910 | if (uname(&uts) < 0) | |
1911 | goto out_fail; | |
1912 | ||
1913 | kernel_version = uts.release; | |
1914 | } | |
ec5761ea | 1915 | |
aac48647 ET |
1916 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) { |
1917 | snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version); | |
1918 | if (vmlinux_path__add(bf) < 0) | |
1919 | goto out_fail; | |
1920 | } | |
cc612d81 ACM |
1921 | |
1922 | return 0; | |
1923 | ||
1924 | out_fail: | |
1925 | vmlinux_path__exit(); | |
1926 | return -1; | |
1927 | } | |
1928 | ||
3bfe5f81 | 1929 | int setup_list(struct strlist **list, const char *list_str, |
655000e7 ACM |
1930 | const char *list_name) |
1931 | { | |
1932 | if (list_str == NULL) | |
1933 | return 0; | |
1934 | ||
4a77e218 | 1935 | *list = strlist__new(list_str, NULL); |
655000e7 ACM |
1936 | if (!*list) { |
1937 | pr_err("problems parsing %s list\n", list_name); | |
1938 | return -1; | |
1939 | } | |
0bc2f2f7 ACM |
1940 | |
1941 | symbol_conf.has_filter = true; | |
655000e7 ACM |
1942 | return 0; |
1943 | } | |
1944 | ||
e03eaa40 DA |
1945 | int setup_intlist(struct intlist **list, const char *list_str, |
1946 | const char *list_name) | |
1947 | { | |
1948 | if (list_str == NULL) | |
1949 | return 0; | |
1950 | ||
1951 | *list = intlist__new(list_str); | |
1952 | if (!*list) { | |
1953 | pr_err("problems parsing %s list\n", list_name); | |
1954 | return -1; | |
1955 | } | |
1956 | return 0; | |
1957 | } | |
1958 | ||
ec80fde7 ACM |
1959 | static bool symbol__read_kptr_restrict(void) |
1960 | { | |
1961 | bool value = false; | |
1962 | ||
1963 | if (geteuid() != 0) { | |
1964 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
1965 | if (fp != NULL) { | |
1966 | char line[8]; | |
1967 | ||
1968 | if (fgets(line, sizeof(line), fp) != NULL) | |
1969 | value = atoi(line) != 0; | |
1970 | ||
1971 | fclose(fp); | |
1972 | } | |
1973 | } | |
1974 | ||
1975 | return value; | |
1976 | } | |
1977 | ||
ce80d3be | 1978 | int symbol__init(struct perf_env *env) |
2446042c | 1979 | { |
ec5761ea DA |
1980 | const char *symfs; |
1981 | ||
85e00b55 JZ |
1982 | if (symbol_conf.initialized) |
1983 | return 0; | |
1984 | ||
9ac3e487 | 1985 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 1986 | |
166ccc9c NK |
1987 | symbol__elf_init(); |
1988 | ||
75be6cf4 ACM |
1989 | if (symbol_conf.sort_by_name) |
1990 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
1991 | sizeof(struct symbol)); | |
b32d133a | 1992 | |
0a7e6d1b | 1993 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0) |
2446042c ACM |
1994 | return -1; |
1995 | ||
c410a338 ACM |
1996 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
1997 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
1998 | return -1; | |
1999 | } | |
2000 | ||
655000e7 ACM |
2001 | if (setup_list(&symbol_conf.dso_list, |
2002 | symbol_conf.dso_list_str, "dso") < 0) | |
2003 | return -1; | |
2004 | ||
2005 | if (setup_list(&symbol_conf.comm_list, | |
2006 | symbol_conf.comm_list_str, "comm") < 0) | |
2007 | goto out_free_dso_list; | |
2008 | ||
e03eaa40 DA |
2009 | if (setup_intlist(&symbol_conf.pid_list, |
2010 | symbol_conf.pid_list_str, "pid") < 0) | |
2011 | goto out_free_comm_list; | |
2012 | ||
2013 | if (setup_intlist(&symbol_conf.tid_list, | |
2014 | symbol_conf.tid_list_str, "tid") < 0) | |
2015 | goto out_free_pid_list; | |
2016 | ||
655000e7 ACM |
2017 | if (setup_list(&symbol_conf.sym_list, |
2018 | symbol_conf.sym_list_str, "symbol") < 0) | |
e03eaa40 | 2019 | goto out_free_tid_list; |
655000e7 | 2020 | |
ec5761ea DA |
2021 | /* |
2022 | * A path to symbols of "/" is identical to "" | |
2023 | * reset here for simplicity. | |
2024 | */ | |
2025 | symfs = realpath(symbol_conf.symfs, NULL); | |
2026 | if (symfs == NULL) | |
2027 | symfs = symbol_conf.symfs; | |
2028 | if (strcmp(symfs, "/") == 0) | |
2029 | symbol_conf.symfs = ""; | |
2030 | if (symfs != symbol_conf.symfs) | |
2031 | free((void *)symfs); | |
2032 | ||
ec80fde7 ACM |
2033 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2034 | ||
85e00b55 | 2035 | symbol_conf.initialized = true; |
4aa65636 | 2036 | return 0; |
655000e7 | 2037 | |
e03eaa40 DA |
2038 | out_free_tid_list: |
2039 | intlist__delete(symbol_conf.tid_list); | |
2040 | out_free_pid_list: | |
2041 | intlist__delete(symbol_conf.pid_list); | |
655000e7 ACM |
2042 | out_free_comm_list: |
2043 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
2044 | out_free_dso_list: |
2045 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 2046 | return -1; |
4aa65636 ACM |
2047 | } |
2048 | ||
d65a458b ACM |
2049 | void symbol__exit(void) |
2050 | { | |
85e00b55 JZ |
2051 | if (!symbol_conf.initialized) |
2052 | return; | |
d65a458b ACM |
2053 | strlist__delete(symbol_conf.sym_list); |
2054 | strlist__delete(symbol_conf.dso_list); | |
2055 | strlist__delete(symbol_conf.comm_list); | |
e03eaa40 DA |
2056 | intlist__delete(symbol_conf.tid_list); |
2057 | intlist__delete(symbol_conf.pid_list); | |
d65a458b ACM |
2058 | vmlinux_path__exit(); |
2059 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 2060 | symbol_conf.initialized = false; |
d65a458b | 2061 | } |