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 = "", |
b32d133a ACM |
42 | }; |
43 | ||
44f24cb3 JO |
44 | static enum dso_binary_type binary_type_symtab[] = { |
45 | DSO_BINARY_TYPE__KALLSYMS, | |
46 | DSO_BINARY_TYPE__GUEST_KALLSYMS, | |
47 | DSO_BINARY_TYPE__JAVA_JIT, | |
48 | DSO_BINARY_TYPE__DEBUGLINK, | |
49 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
50 | DSO_BINARY_TYPE__FEDORA_DEBUGINFO, | |
51 | DSO_BINARY_TYPE__UBUNTU_DEBUGINFO, | |
52 | DSO_BINARY_TYPE__BUILDID_DEBUGINFO, | |
53 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
54 | DSO_BINARY_TYPE__GUEST_KMODULE, | |
c00c48fc | 55 | DSO_BINARY_TYPE__GUEST_KMODULE_COMP, |
44f24cb3 | 56 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE, |
c00c48fc | 57 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP, |
9cd00941 | 58 | DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO, |
44f24cb3 JO |
59 | DSO_BINARY_TYPE__NOT_FOUND, |
60 | }; | |
61 | ||
028df767 | 62 | #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab) |
44f24cb3 | 63 | |
36a3e646 | 64 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee | 65 | { |
31877908 AB |
66 | symbol_type = toupper(symbol_type); |
67 | ||
6893d4ee ACM |
68 | switch (map_type) { |
69 | case MAP__FUNCTION: | |
70 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 | 71 | case MAP__VARIABLE: |
31877908 | 72 | return symbol_type == 'D'; |
6893d4ee ACM |
73 | default: |
74 | return false; | |
75 | } | |
76 | } | |
77 | ||
694bf407 AB |
78 | static int prefix_underscores_count(const char *str) |
79 | { | |
80 | const char *tail = str; | |
81 | ||
82 | while (*tail == '_') | |
83 | tail++; | |
84 | ||
85 | return tail - str; | |
86 | } | |
87 | ||
fb6d5942 NR |
88 | int __weak arch__choose_best_symbol(struct symbol *syma, |
89 | struct symbol *symb __maybe_unused) | |
90 | { | |
91 | /* Avoid "SyS" kernel syscall aliases */ | |
92 | if (strlen(syma->name) >= 3 && !strncmp(syma->name, "SyS", 3)) | |
93 | return SYMBOL_B; | |
94 | if (strlen(syma->name) >= 10 && !strncmp(syma->name, "compat_SyS", 10)) | |
95 | return SYMBOL_B; | |
96 | ||
97 | return SYMBOL_A; | |
98 | } | |
694bf407 AB |
99 | |
100 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
101 | { | |
102 | s64 a; | |
103 | s64 b; | |
3445432b | 104 | size_t na, nb; |
694bf407 AB |
105 | |
106 | /* Prefer a symbol with non zero length */ | |
107 | a = syma->end - syma->start; | |
108 | b = symb->end - symb->start; | |
109 | if ((b == 0) && (a > 0)) | |
110 | return SYMBOL_A; | |
111 | else if ((a == 0) && (b > 0)) | |
112 | return SYMBOL_B; | |
113 | ||
114 | /* Prefer a non weak symbol over a weak one */ | |
115 | a = syma->binding == STB_WEAK; | |
116 | b = symb->binding == STB_WEAK; | |
117 | if (b && !a) | |
118 | return SYMBOL_A; | |
119 | if (a && !b) | |
120 | return SYMBOL_B; | |
121 | ||
122 | /* Prefer a global symbol over a non global one */ | |
123 | a = syma->binding == STB_GLOBAL; | |
124 | b = symb->binding == STB_GLOBAL; | |
125 | if (a && !b) | |
126 | return SYMBOL_A; | |
127 | if (b && !a) | |
128 | return SYMBOL_B; | |
129 | ||
130 | /* Prefer a symbol with less underscores */ | |
131 | a = prefix_underscores_count(syma->name); | |
132 | b = prefix_underscores_count(symb->name); | |
133 | if (b > a) | |
134 | return SYMBOL_A; | |
135 | else if (a > b) | |
136 | return SYMBOL_B; | |
137 | ||
3445432b AH |
138 | /* Choose the symbol with the longest name */ |
139 | na = strlen(syma->name); | |
140 | nb = strlen(symb->name); | |
141 | if (na > nb) | |
694bf407 | 142 | return SYMBOL_A; |
3445432b | 143 | else if (na < nb) |
694bf407 | 144 | return SYMBOL_B; |
3445432b | 145 | |
fb6d5942 | 146 | return arch__choose_best_symbol(syma, symb); |
694bf407 AB |
147 | } |
148 | ||
e5a1845f | 149 | void symbols__fixup_duplicate(struct rb_root *symbols) |
694bf407 AB |
150 | { |
151 | struct rb_node *nd; | |
152 | struct symbol *curr, *next; | |
153 | ||
154 | nd = rb_first(symbols); | |
155 | ||
156 | while (nd) { | |
157 | curr = rb_entry(nd, struct symbol, rb_node); | |
158 | again: | |
159 | nd = rb_next(&curr->rb_node); | |
160 | next = rb_entry(nd, struct symbol, rb_node); | |
161 | ||
162 | if (!nd) | |
163 | break; | |
164 | ||
165 | if (curr->start != next->start) | |
166 | continue; | |
167 | ||
168 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
169 | rb_erase(&next->rb_node, symbols); | |
d4f74eb8 | 170 | symbol__delete(next); |
694bf407 AB |
171 | goto again; |
172 | } else { | |
173 | nd = rb_next(&curr->rb_node); | |
174 | rb_erase(&curr->rb_node, symbols); | |
d4f74eb8 | 175 | symbol__delete(curr); |
694bf407 AB |
176 | } |
177 | } | |
178 | } | |
179 | ||
e5a1845f | 180 | void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 181 | { |
aeafcbaf | 182 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 183 | struct symbol *curr, *prev; |
af427bf5 ACM |
184 | |
185 | if (prevnd == NULL) | |
186 | return; | |
187 | ||
2e538c4a ACM |
188 | curr = rb_entry(prevnd, struct symbol, rb_node); |
189 | ||
af427bf5 | 190 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
191 | prev = curr; |
192 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 193 | |
3b01a413 | 194 | if (prev->end == prev->start && prev->end != curr->start) |
2c241bd3 | 195 | prev->end = curr->start; |
af427bf5 | 196 | } |
2e538c4a ACM |
197 | |
198 | /* Last entry */ | |
199 | if (curr->end == curr->start) | |
200 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
201 | } |
202 | ||
e5a1845f | 203 | void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 | 204 | { |
1eee78ae | 205 | struct maps *maps = &mg->maps[type]; |
4bb7123d | 206 | struct map *next, *curr; |
af427bf5 | 207 | |
6a2ffcdd ACM |
208 | pthread_rwlock_wrlock(&maps->lock); |
209 | ||
4bb7123d ACM |
210 | curr = maps__first(maps); |
211 | if (curr == NULL) | |
6a2ffcdd | 212 | goto out_unlock; |
af427bf5 | 213 | |
4bb7123d ACM |
214 | for (next = map__next(curr); next; next = map__next(curr)) { |
215 | curr->end = next->start; | |
216 | curr = next; | |
2e538c4a | 217 | } |
90c83218 ACM |
218 | |
219 | /* | |
220 | * We still haven't the actual symbols, so guess the | |
221 | * last map final address. | |
222 | */ | |
9d1faba5 | 223 | curr->end = ~0ULL; |
6a2ffcdd ACM |
224 | |
225 | out_unlock: | |
226 | pthread_rwlock_unlock(&maps->lock); | |
af427bf5 ACM |
227 | } |
228 | ||
e5a1845f | 229 | struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name) |
a2928c42 | 230 | { |
0085c954 | 231 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
232 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
233 | sizeof(*sym) + namelen)); | |
234 | if (sym == NULL) | |
0b73da3f IM |
235 | return NULL; |
236 | ||
75be6cf4 | 237 | if (symbol_conf.priv_size) |
aeafcbaf | 238 | sym = ((void *)sym) + symbol_conf.priv_size; |
e4204992 | 239 | |
aeafcbaf | 240 | sym->start = start; |
2c241bd3 | 241 | sym->end = len ? start + len : start; |
aeafcbaf ACM |
242 | sym->binding = binding; |
243 | sym->namelen = namelen - 1; | |
e4204992 | 244 | |
aeafcbaf ACM |
245 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
246 | __func__, name, start, sym->end); | |
247 | memcpy(sym->name, name, namelen); | |
a2928c42 | 248 | |
aeafcbaf | 249 | return sym; |
a2928c42 ACM |
250 | } |
251 | ||
aeafcbaf | 252 | void symbol__delete(struct symbol *sym) |
a2928c42 | 253 | { |
aeafcbaf | 254 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
255 | } |
256 | ||
cdd059d7 | 257 | size_t symbol__fprintf(struct symbol *sym, FILE *fp) |
a2928c42 | 258 | { |
9486aa38 | 259 | return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n", |
aeafcbaf ACM |
260 | sym->start, sym->end, |
261 | sym->binding == STB_GLOBAL ? 'g' : | |
262 | sym->binding == STB_LOCAL ? 'l' : 'w', | |
263 | sym->name); | |
a2928c42 ACM |
264 | } |
265 | ||
a978f2ab AN |
266 | size_t symbol__fprintf_symname_offs(const struct symbol *sym, |
267 | const struct addr_location *al, FILE *fp) | |
547a92e0 | 268 | { |
a978f2ab AN |
269 | unsigned long offset; |
270 | size_t length; | |
271 | ||
272 | if (sym && sym->name) { | |
273 | length = fprintf(fp, "%s", sym->name); | |
274 | if (al) { | |
0b8c25d9 DA |
275 | if (al->addr < sym->end) |
276 | offset = al->addr - sym->start; | |
277 | else | |
278 | offset = al->addr - al->map->start - sym->start; | |
a978f2ab AN |
279 | length += fprintf(fp, "+0x%lx", offset); |
280 | } | |
281 | return length; | |
282 | } else | |
283 | return fprintf(fp, "[unknown]"); | |
284 | } | |
547a92e0 | 285 | |
a978f2ab AN |
286 | size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp) |
287 | { | |
288 | return symbol__fprintf_symname_offs(sym, NULL, fp); | |
547a92e0 AN |
289 | } |
290 | ||
cdd059d7 | 291 | void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
292 | { |
293 | struct symbol *pos; | |
aeafcbaf | 294 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
295 | |
296 | while (next) { | |
297 | pos = rb_entry(next, struct symbol, rb_node); | |
298 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 299 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 300 | symbol__delete(pos); |
a2928c42 ACM |
301 | } |
302 | } | |
303 | ||
e5a1845f | 304 | void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
a2928c42 | 305 | { |
aeafcbaf | 306 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 307 | struct rb_node *parent = NULL; |
9cffa8d5 | 308 | const u64 ip = sym->start; |
a2928c42 ACM |
309 | struct symbol *s; |
310 | ||
311 | while (*p != NULL) { | |
312 | parent = *p; | |
313 | s = rb_entry(parent, struct symbol, rb_node); | |
314 | if (ip < s->start) | |
315 | p = &(*p)->rb_left; | |
316 | else | |
317 | p = &(*p)->rb_right; | |
318 | } | |
319 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 320 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
321 | } |
322 | ||
aeafcbaf | 323 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
324 | { |
325 | struct rb_node *n; | |
326 | ||
aeafcbaf | 327 | if (symbols == NULL) |
a2928c42 ACM |
328 | return NULL; |
329 | ||
aeafcbaf | 330 | n = symbols->rb_node; |
a2928c42 ACM |
331 | |
332 | while (n) { | |
333 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
334 | ||
335 | if (ip < s->start) | |
336 | n = n->rb_left; | |
2c241bd3 | 337 | else if (ip >= s->end) |
a2928c42 ACM |
338 | n = n->rb_right; |
339 | else | |
340 | return s; | |
341 | } | |
342 | ||
343 | return NULL; | |
344 | } | |
345 | ||
8e0cf965 AH |
346 | static struct symbol *symbols__first(struct rb_root *symbols) |
347 | { | |
348 | struct rb_node *n = rb_first(symbols); | |
349 | ||
350 | if (n) | |
351 | return rb_entry(n, struct symbol, rb_node); | |
352 | ||
353 | return NULL; | |
354 | } | |
355 | ||
9c00a81b AH |
356 | static struct symbol *symbols__next(struct symbol *sym) |
357 | { | |
358 | struct rb_node *n = rb_next(&sym->rb_node); | |
359 | ||
360 | if (n) | |
361 | return rb_entry(n, struct symbol, rb_node); | |
362 | ||
363 | return NULL; | |
364 | } | |
365 | ||
79406cd7 ACM |
366 | struct symbol_name_rb_node { |
367 | struct rb_node rb_node; | |
368 | struct symbol sym; | |
369 | }; | |
370 | ||
aeafcbaf | 371 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 372 | { |
aeafcbaf | 373 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 374 | struct rb_node *parent = NULL; |
02a9d037 RV |
375 | struct symbol_name_rb_node *symn, *s; |
376 | ||
377 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
378 | |
379 | while (*p != NULL) { | |
380 | parent = *p; | |
381 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
382 | if (strcmp(sym->name, s->sym.name) < 0) | |
383 | p = &(*p)->rb_left; | |
384 | else | |
385 | p = &(*p)->rb_right; | |
386 | } | |
387 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 388 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
389 | } |
390 | ||
aeafcbaf ACM |
391 | static void symbols__sort_by_name(struct rb_root *symbols, |
392 | struct rb_root *source) | |
79406cd7 ACM |
393 | { |
394 | struct rb_node *nd; | |
395 | ||
396 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
397 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 398 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
399 | } |
400 | } | |
401 | ||
aeafcbaf ACM |
402 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
403 | const char *name) | |
79406cd7 ACM |
404 | { |
405 | struct rb_node *n; | |
5bcaaca3 | 406 | struct symbol_name_rb_node *s = NULL; |
79406cd7 | 407 | |
aeafcbaf | 408 | if (symbols == NULL) |
79406cd7 ACM |
409 | return NULL; |
410 | ||
aeafcbaf | 411 | n = symbols->rb_node; |
79406cd7 ACM |
412 | |
413 | while (n) { | |
79406cd7 ACM |
414 | int cmp; |
415 | ||
416 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
031b84c4 | 417 | cmp = arch__compare_symbol_names(name, s->sym.name); |
79406cd7 ACM |
418 | |
419 | if (cmp < 0) | |
420 | n = n->rb_left; | |
421 | else if (cmp > 0) | |
422 | n = n->rb_right; | |
423 | else | |
de480999 | 424 | break; |
79406cd7 ACM |
425 | } |
426 | ||
de480999 NK |
427 | if (n == NULL) |
428 | return NULL; | |
429 | ||
430 | /* return first symbol that has same name (if any) */ | |
431 | for (n = rb_prev(n); n; n = rb_prev(n)) { | |
432 | struct symbol_name_rb_node *tmp; | |
433 | ||
434 | tmp = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
031b84c4 | 435 | if (arch__compare_symbol_names(tmp->sym.name, s->sym.name)) |
de480999 NK |
436 | break; |
437 | ||
438 | s = tmp; | |
439 | } | |
440 | ||
441 | return &s->sym; | |
79406cd7 ACM |
442 | } |
443 | ||
aeafcbaf | 444 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 445 | enum map_type type, u64 addr) |
fcf1203a | 446 | { |
aeafcbaf | 447 | return symbols__find(&dso->symbols[type], addr); |
fcf1203a ACM |
448 | } |
449 | ||
9c00a81b | 450 | struct symbol *dso__first_symbol(struct dso *dso, enum map_type type) |
8e0cf965 AH |
451 | { |
452 | return symbols__first(&dso->symbols[type]); | |
9c00a81b AH |
453 | } |
454 | ||
455 | struct symbol *dso__next_symbol(struct symbol *sym) | |
456 | { | |
457 | return symbols__next(sym); | |
8e0cf965 AH |
458 | } |
459 | ||
18bd7264 ACM |
460 | struct symbol *symbol__next_by_name(struct symbol *sym) |
461 | { | |
462 | struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym); | |
463 | struct rb_node *n = rb_next(&s->rb_node); | |
464 | ||
465 | return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL; | |
466 | } | |
467 | ||
468 | /* | |
469 | * Teturns first symbol that matched with @name. | |
470 | */ | |
aeafcbaf | 471 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
472 | const char *name) |
473 | { | |
aeafcbaf | 474 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
475 | } |
476 | ||
aeafcbaf | 477 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 478 | { |
aeafcbaf ACM |
479 | dso__set_sorted_by_name(dso, type); |
480 | return symbols__sort_by_name(&dso->symbol_names[type], | |
481 | &dso->symbols[type]); | |
79406cd7 ACM |
482 | } |
483 | ||
aeafcbaf ACM |
484 | size_t dso__fprintf_symbols_by_name(struct dso *dso, |
485 | enum map_type type, FILE *fp) | |
90f18e63 SD |
486 | { |
487 | size_t ret = 0; | |
488 | struct rb_node *nd; | |
489 | struct symbol_name_rb_node *pos; | |
490 | ||
aeafcbaf | 491 | for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { |
90f18e63 SD |
492 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); |
493 | fprintf(fp, "%s\n", pos->sym.name); | |
494 | } | |
495 | ||
496 | return ret; | |
497 | } | |
498 | ||
316d70d6 AH |
499 | int modules__parse(const char *filename, void *arg, |
500 | int (*process_module)(void *arg, const char *name, | |
501 | u64 start)) | |
502 | { | |
503 | char *line = NULL; | |
504 | size_t n; | |
505 | FILE *file; | |
506 | int err = 0; | |
507 | ||
508 | file = fopen(filename, "r"); | |
509 | if (file == NULL) | |
510 | return -1; | |
511 | ||
512 | while (1) { | |
513 | char name[PATH_MAX]; | |
514 | u64 start; | |
515 | char *sep; | |
516 | ssize_t line_len; | |
517 | ||
518 | line_len = getline(&line, &n, file); | |
519 | if (line_len < 0) { | |
520 | if (feof(file)) | |
521 | break; | |
522 | err = -1; | |
523 | goto out; | |
524 | } | |
525 | ||
526 | if (!line) { | |
527 | err = -1; | |
528 | goto out; | |
529 | } | |
530 | ||
531 | line[--line_len] = '\0'; /* \n */ | |
532 | ||
533 | sep = strrchr(line, 'x'); | |
534 | if (sep == NULL) | |
535 | continue; | |
536 | ||
537 | hex2u64(sep + 1, &start); | |
538 | ||
539 | sep = strchr(line, ' '); | |
540 | if (sep == NULL) | |
541 | continue; | |
542 | ||
543 | *sep = '\0'; | |
544 | ||
545 | scnprintf(name, sizeof(name), "[%s]", line); | |
546 | ||
547 | err = process_module(arg, name, start); | |
548 | if (err) | |
549 | break; | |
550 | } | |
551 | out: | |
552 | free(line); | |
553 | fclose(file); | |
554 | return err; | |
555 | } | |
556 | ||
682b335a ACM |
557 | struct process_kallsyms_args { |
558 | struct map *map; | |
559 | struct dso *dso; | |
560 | }; | |
561 | ||
e7110b9f ACM |
562 | /* |
563 | * These are symbols in the kernel image, so make sure that | |
564 | * sym is from a kernel DSO. | |
565 | */ | |
82d1deb0 DA |
566 | bool symbol__is_idle(struct symbol *sym) |
567 | { | |
568 | const char * const idle_symbols[] = { | |
569 | "cpu_idle", | |
e0336ed6 | 570 | "cpu_startup_entry", |
82d1deb0 DA |
571 | "intel_idle", |
572 | "default_idle", | |
573 | "native_safe_halt", | |
574 | "enter_idle", | |
575 | "exit_idle", | |
576 | "mwait_idle", | |
577 | "mwait_idle_with_hints", | |
578 | "poll_idle", | |
579 | "ppc64_runlatch_off", | |
580 | "pseries_dedicated_idle_sleep", | |
581 | NULL | |
582 | }; | |
583 | ||
584 | int i; | |
585 | ||
586 | if (!sym) | |
587 | return false; | |
588 | ||
589 | for (i = 0; idle_symbols[i]; i++) { | |
590 | if (!strcmp(idle_symbols[i], sym->name)) | |
591 | return true; | |
592 | } | |
593 | ||
594 | return false; | |
595 | } | |
596 | ||
682b335a | 597 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 598 | char type, u64 start) |
682b335a ACM |
599 | { |
600 | struct symbol *sym; | |
601 | struct process_kallsyms_args *a = arg; | |
602 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
603 | ||
604 | if (!symbol_type__is_a(type, a->map->type)) | |
605 | return 0; | |
606 | ||
82151520 CS |
607 | /* |
608 | * module symbols are not sorted so we add all | |
609 | * symbols, setting length to 0, and rely on | |
610 | * symbols__fixup_end() to fix it up. | |
611 | */ | |
612 | sym = symbol__new(start, 0, kallsyms2elf_type(type), name); | |
682b335a ACM |
613 | if (sym == NULL) |
614 | return -ENOMEM; | |
615 | /* | |
616 | * We will pass the symbols to the filter later, in | |
617 | * map__split_kallsyms, when we have split the maps per module | |
618 | */ | |
619 | symbols__insert(root, sym); | |
a1645ce1 | 620 | |
682b335a ACM |
621 | return 0; |
622 | } | |
623 | ||
624 | /* | |
625 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
626 | * so that we can in the next step set the symbol ->end address and then | |
627 | * call kernel_maps__split_kallsyms. | |
628 | */ | |
aeafcbaf | 629 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 630 | struct map *map) |
682b335a | 631 | { |
aeafcbaf | 632 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 633 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
634 | } |
635 | ||
8e0cf965 AH |
636 | static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map, |
637 | symbol_filter_t filter) | |
638 | { | |
ba92732e | 639 | struct map_groups *kmaps = map__kmaps(map); |
8e0cf965 AH |
640 | struct map *curr_map; |
641 | struct symbol *pos; | |
642 | int count = 0, moved = 0; | |
643 | struct rb_root *root = &dso->symbols[map->type]; | |
644 | struct rb_node *next = rb_first(root); | |
645 | ||
ba92732e WN |
646 | if (!kmaps) |
647 | return -1; | |
648 | ||
8e0cf965 AH |
649 | while (next) { |
650 | char *module; | |
651 | ||
652 | pos = rb_entry(next, struct symbol, rb_node); | |
653 | next = rb_next(&pos->rb_node); | |
654 | ||
655 | module = strchr(pos->name, '\t'); | |
656 | if (module) | |
657 | *module = '\0'; | |
658 | ||
659 | curr_map = map_groups__find(kmaps, map->type, pos->start); | |
660 | ||
661 | if (!curr_map || (filter && filter(curr_map, pos))) { | |
facf3f06 | 662 | rb_erase_init(&pos->rb_node, root); |
8e0cf965 AH |
663 | symbol__delete(pos); |
664 | } else { | |
665 | pos->start -= curr_map->start - curr_map->pgoff; | |
666 | if (pos->end) | |
667 | pos->end -= curr_map->start - curr_map->pgoff; | |
668 | if (curr_map != map) { | |
facf3f06 | 669 | rb_erase_init(&pos->rb_node, root); |
8e0cf965 AH |
670 | symbols__insert( |
671 | &curr_map->dso->symbols[curr_map->type], | |
672 | pos); | |
673 | ++moved; | |
674 | } else { | |
675 | ++count; | |
676 | } | |
677 | } | |
678 | } | |
679 | ||
680 | /* Symbols have been adjusted */ | |
681 | dso->adjust_symbols = 1; | |
682 | ||
683 | return count + moved; | |
684 | } | |
685 | ||
2e538c4a ACM |
686 | /* |
687 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
688 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
689 | * the original ELF section names vmlinux have. | |
690 | */ | |
d9b62aba | 691 | static int dso__split_kallsyms(struct dso *dso, struct map *map, u64 delta, |
9de89fe7 | 692 | symbol_filter_t filter) |
2e538c4a | 693 | { |
ba92732e WN |
694 | struct map_groups *kmaps = map__kmaps(map); |
695 | struct machine *machine; | |
4e06255f | 696 | struct map *curr_map = map; |
2e538c4a | 697 | struct symbol *pos; |
48000a1a | 698 | int count = 0, moved = 0; |
aeafcbaf | 699 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 700 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
701 | int kernel_range = 0; |
702 | ||
ba92732e WN |
703 | if (!kmaps) |
704 | return -1; | |
705 | ||
706 | machine = kmaps->machine; | |
707 | ||
2e538c4a ACM |
708 | while (next) { |
709 | char *module; | |
710 | ||
711 | pos = rb_entry(next, struct symbol, rb_node); | |
712 | next = rb_next(&pos->rb_node); | |
713 | ||
714 | module = strchr(pos->name, '\t'); | |
715 | if (module) { | |
75be6cf4 | 716 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
717 | goto discard_symbol; |
718 | ||
2e538c4a ACM |
719 | *module++ = '\0'; |
720 | ||
b7cece76 | 721 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 722 | if (curr_map != map && |
aeafcbaf | 723 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 724 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
725 | /* |
726 | * We assume all symbols of a module are | |
727 | * continuous in * kallsyms, so curr_map | |
728 | * points to a module and all its | |
729 | * symbols are in its kmap. Mark it as | |
730 | * loaded. | |
731 | */ | |
732 | dso__set_loaded(curr_map->dso, | |
733 | curr_map->type); | |
734 | } | |
735 | ||
736 | curr_map = map_groups__find_by_name(kmaps, | |
737 | map->type, module); | |
4e06255f | 738 | if (curr_map == NULL) { |
2f51903b | 739 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 740 | "inconsistency while looking " |
a1645ce1 | 741 | "for \"%s\" module!\n", |
23346f21 | 742 | machine->root_dir, module); |
a1645ce1 ZY |
743 | curr_map = map; |
744 | goto discard_symbol; | |
af427bf5 | 745 | } |
b7cece76 | 746 | |
a1645ce1 | 747 | if (curr_map->dso->loaded && |
23346f21 | 748 | !machine__is_default_guest(machine)) |
b7cece76 | 749 | goto discard_symbol; |
af427bf5 | 750 | } |
2e538c4a ACM |
751 | /* |
752 | * So that we look just like we get from .ko files, | |
753 | * i.e. not prelinked, relative to map->start. | |
754 | */ | |
4e06255f ACM |
755 | pos->start = curr_map->map_ip(curr_map, pos->start); |
756 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
757 | } else if (curr_map != map) { | |
2e538c4a | 758 | char dso_name[PATH_MAX]; |
aeafcbaf | 759 | struct dso *ndso; |
2e538c4a | 760 | |
d9b62aba AH |
761 | if (delta) { |
762 | /* Kernel was relocated at boot time */ | |
763 | pos->start -= delta; | |
764 | pos->end -= delta; | |
765 | } | |
766 | ||
8a953312 ACM |
767 | if (count == 0) { |
768 | curr_map = map; | |
769 | goto filter_symbol; | |
770 | } | |
771 | ||
aeafcbaf | 772 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
773 | snprintf(dso_name, sizeof(dso_name), |
774 | "[guest.kernel].%d", | |
775 | kernel_range++); | |
776 | else | |
777 | snprintf(dso_name, sizeof(dso_name), | |
778 | "[kernel].%d", | |
779 | kernel_range++); | |
2e538c4a | 780 | |
aeafcbaf ACM |
781 | ndso = dso__new(dso_name); |
782 | if (ndso == NULL) | |
2e538c4a ACM |
783 | return -1; |
784 | ||
aeafcbaf | 785 | ndso->kernel = dso->kernel; |
a1645ce1 | 786 | |
aeafcbaf | 787 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 788 | if (curr_map == NULL) { |
d3a7c489 | 789 | dso__put(ndso); |
2e538c4a ACM |
790 | return -1; |
791 | } | |
a2928c42 | 792 | |
4e06255f | 793 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 794 | map_groups__insert(kmaps, curr_map); |
2e538c4a | 795 | ++kernel_range; |
d9b62aba AH |
796 | } else if (delta) { |
797 | /* Kernel was relocated at boot time */ | |
798 | pos->start -= delta; | |
799 | pos->end -= delta; | |
2e538c4a | 800 | } |
8a953312 | 801 | filter_symbol: |
4e06255f | 802 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 803 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 804 | symbol__delete(pos); |
2e538c4a | 805 | } else { |
4e06255f ACM |
806 | if (curr_map != map) { |
807 | rb_erase(&pos->rb_node, root); | |
808 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
809 | ++moved; |
810 | } else | |
811 | ++count; | |
9974f496 | 812 | } |
a2928c42 ACM |
813 | } |
814 | ||
a1645ce1 | 815 | if (curr_map != map && |
aeafcbaf | 816 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 817 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
818 | dso__set_loaded(curr_map->dso, curr_map->type); |
819 | } | |
820 | ||
8a953312 | 821 | return count + moved; |
2e538c4a | 822 | } |
a2928c42 | 823 | |
3f067dca ACM |
824 | bool symbol__restricted_filename(const char *filename, |
825 | const char *restricted_filename) | |
ec80fde7 ACM |
826 | { |
827 | bool restricted = false; | |
828 | ||
829 | if (symbol_conf.kptr_restrict) { | |
830 | char *r = realpath(filename, NULL); | |
831 | ||
832 | if (r != NULL) { | |
833 | restricted = strcmp(r, restricted_filename) == 0; | |
834 | free(r); | |
835 | return restricted; | |
836 | } | |
837 | } | |
838 | ||
839 | return restricted; | |
840 | } | |
841 | ||
52afdaf9 AH |
842 | struct module_info { |
843 | struct rb_node rb_node; | |
844 | char *name; | |
845 | u64 start; | |
8e0cf965 AH |
846 | }; |
847 | ||
52afdaf9 | 848 | static void add_module(struct module_info *mi, struct rb_root *modules) |
8e0cf965 | 849 | { |
52afdaf9 AH |
850 | struct rb_node **p = &modules->rb_node; |
851 | struct rb_node *parent = NULL; | |
852 | struct module_info *m; | |
8e0cf965 | 853 | |
52afdaf9 AH |
854 | while (*p != NULL) { |
855 | parent = *p; | |
856 | m = rb_entry(parent, struct module_info, rb_node); | |
857 | if (strcmp(mi->name, m->name) < 0) | |
858 | p = &(*p)->rb_left; | |
859 | else | |
860 | p = &(*p)->rb_right; | |
861 | } | |
862 | rb_link_node(&mi->rb_node, parent, p); | |
863 | rb_insert_color(&mi->rb_node, modules); | |
864 | } | |
865 | ||
866 | static void delete_modules(struct rb_root *modules) | |
867 | { | |
868 | struct module_info *mi; | |
869 | struct rb_node *next = rb_first(modules); | |
870 | ||
871 | while (next) { | |
872 | mi = rb_entry(next, struct module_info, rb_node); | |
873 | next = rb_next(&mi->rb_node); | |
874 | rb_erase(&mi->rb_node, modules); | |
74cf249d | 875 | zfree(&mi->name); |
52afdaf9 AH |
876 | free(mi); |
877 | } | |
878 | } | |
879 | ||
880 | static struct module_info *find_module(const char *name, | |
881 | struct rb_root *modules) | |
882 | { | |
883 | struct rb_node *n = modules->rb_node; | |
884 | ||
885 | while (n) { | |
886 | struct module_info *m; | |
887 | int cmp; | |
888 | ||
889 | m = rb_entry(n, struct module_info, rb_node); | |
890 | cmp = strcmp(name, m->name); | |
891 | if (cmp < 0) | |
892 | n = n->rb_left; | |
893 | else if (cmp > 0) | |
894 | n = n->rb_right; | |
895 | else | |
896 | return m; | |
897 | } | |
898 | ||
899 | return NULL; | |
900 | } | |
901 | ||
902 | static int __read_proc_modules(void *arg, const char *name, u64 start) | |
903 | { | |
904 | struct rb_root *modules = arg; | |
905 | struct module_info *mi; | |
906 | ||
907 | mi = zalloc(sizeof(struct module_info)); | |
908 | if (!mi) | |
8e0cf965 AH |
909 | return -ENOMEM; |
910 | ||
52afdaf9 AH |
911 | mi->name = strdup(name); |
912 | mi->start = start; | |
8e0cf965 | 913 | |
52afdaf9 AH |
914 | if (!mi->name) { |
915 | free(mi); | |
916 | return -ENOMEM; | |
917 | } | |
918 | ||
919 | add_module(mi, modules); | |
920 | ||
921 | return 0; | |
922 | } | |
923 | ||
924 | static int read_proc_modules(const char *filename, struct rb_root *modules) | |
925 | { | |
926 | if (symbol__restricted_filename(filename, "/proc/modules")) | |
927 | return -1; | |
928 | ||
929 | if (modules__parse(filename, modules, __read_proc_modules)) { | |
930 | delete_modules(modules); | |
931 | return -1; | |
932 | } | |
8e0cf965 AH |
933 | |
934 | return 0; | |
935 | } | |
936 | ||
fc1b691d AH |
937 | int compare_proc_modules(const char *from, const char *to) |
938 | { | |
939 | struct rb_root from_modules = RB_ROOT; | |
940 | struct rb_root to_modules = RB_ROOT; | |
941 | struct rb_node *from_node, *to_node; | |
942 | struct module_info *from_m, *to_m; | |
943 | int ret = -1; | |
944 | ||
945 | if (read_proc_modules(from, &from_modules)) | |
946 | return -1; | |
947 | ||
948 | if (read_proc_modules(to, &to_modules)) | |
949 | goto out_delete_from; | |
950 | ||
951 | from_node = rb_first(&from_modules); | |
952 | to_node = rb_first(&to_modules); | |
953 | while (from_node) { | |
954 | if (!to_node) | |
955 | break; | |
956 | ||
957 | from_m = rb_entry(from_node, struct module_info, rb_node); | |
958 | to_m = rb_entry(to_node, struct module_info, rb_node); | |
959 | ||
960 | if (from_m->start != to_m->start || | |
961 | strcmp(from_m->name, to_m->name)) | |
962 | break; | |
963 | ||
964 | from_node = rb_next(from_node); | |
965 | to_node = rb_next(to_node); | |
966 | } | |
967 | ||
968 | if (!from_node && !to_node) | |
969 | ret = 0; | |
970 | ||
971 | delete_modules(&to_modules); | |
972 | out_delete_from: | |
973 | delete_modules(&from_modules); | |
974 | ||
975 | return ret; | |
976 | } | |
977 | ||
52afdaf9 AH |
978 | static int do_validate_kcore_modules(const char *filename, struct map *map, |
979 | struct map_groups *kmaps) | |
980 | { | |
981 | struct rb_root modules = RB_ROOT; | |
982 | struct map *old_map; | |
983 | int err; | |
984 | ||
985 | err = read_proc_modules(filename, &modules); | |
986 | if (err) | |
987 | return err; | |
988 | ||
989 | old_map = map_groups__first(kmaps, map->type); | |
990 | while (old_map) { | |
991 | struct map *next = map_groups__next(old_map); | |
992 | struct module_info *mi; | |
993 | ||
994 | if (old_map == map || old_map->start == map->start) { | |
995 | /* The kernel map */ | |
996 | old_map = next; | |
997 | continue; | |
998 | } | |
999 | ||
1000 | /* Module must be in memory at the same address */ | |
1001 | mi = find_module(old_map->dso->short_name, &modules); | |
1002 | if (!mi || mi->start != old_map->start) { | |
1003 | err = -EINVAL; | |
1004 | goto out; | |
1005 | } | |
1006 | ||
1007 | old_map = next; | |
1008 | } | |
1009 | out: | |
1010 | delete_modules(&modules); | |
1011 | return err; | |
1012 | } | |
1013 | ||
8e0cf965 | 1014 | /* |
52afdaf9 | 1015 | * If kallsyms is referenced by name then we look for filename in the same |
8e0cf965 AH |
1016 | * directory. |
1017 | */ | |
52afdaf9 AH |
1018 | static bool filename_from_kallsyms_filename(char *filename, |
1019 | const char *base_name, | |
1020 | const char *kallsyms_filename) | |
8e0cf965 AH |
1021 | { |
1022 | char *name; | |
1023 | ||
52afdaf9 AH |
1024 | strcpy(filename, kallsyms_filename); |
1025 | name = strrchr(filename, '/'); | |
8e0cf965 AH |
1026 | if (!name) |
1027 | return false; | |
1028 | ||
52afdaf9 AH |
1029 | name += 1; |
1030 | ||
1031 | if (!strcmp(name, "kallsyms")) { | |
1032 | strcpy(name, base_name); | |
8e0cf965 AH |
1033 | return true; |
1034 | } | |
1035 | ||
1036 | return false; | |
1037 | } | |
1038 | ||
52afdaf9 AH |
1039 | static int validate_kcore_modules(const char *kallsyms_filename, |
1040 | struct map *map) | |
1041 | { | |
ba92732e | 1042 | struct map_groups *kmaps = map__kmaps(map); |
52afdaf9 AH |
1043 | char modules_filename[PATH_MAX]; |
1044 | ||
ba92732e WN |
1045 | if (!kmaps) |
1046 | return -EINVAL; | |
1047 | ||
52afdaf9 AH |
1048 | if (!filename_from_kallsyms_filename(modules_filename, "modules", |
1049 | kallsyms_filename)) | |
1050 | return -EINVAL; | |
1051 | ||
1052 | if (do_validate_kcore_modules(modules_filename, map, kmaps)) | |
1053 | return -EINVAL; | |
1054 | ||
1055 | return 0; | |
1056 | } | |
1057 | ||
a00d28cb AH |
1058 | static int validate_kcore_addresses(const char *kallsyms_filename, |
1059 | struct map *map) | |
1060 | { | |
1061 | struct kmap *kmap = map__kmap(map); | |
1062 | ||
ba92732e WN |
1063 | if (!kmap) |
1064 | return -EINVAL; | |
1065 | ||
a00d28cb AH |
1066 | if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) { |
1067 | u64 start; | |
1068 | ||
1069 | start = kallsyms__get_function_start(kallsyms_filename, | |
1070 | kmap->ref_reloc_sym->name); | |
1071 | if (start != kmap->ref_reloc_sym->addr) | |
1072 | return -EINVAL; | |
1073 | } | |
1074 | ||
1075 | return validate_kcore_modules(kallsyms_filename, map); | |
1076 | } | |
1077 | ||
52afdaf9 AH |
1078 | struct kcore_mapfn_data { |
1079 | struct dso *dso; | |
1080 | enum map_type type; | |
1081 | struct list_head maps; | |
1082 | }; | |
1083 | ||
1084 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
1085 | { | |
1086 | struct kcore_mapfn_data *md = data; | |
1087 | struct map *map; | |
1088 | ||
1089 | map = map__new2(start, md->dso, md->type); | |
1090 | if (map == NULL) | |
1091 | return -ENOMEM; | |
1092 | ||
1093 | map->end = map->start + len; | |
1094 | map->pgoff = pgoff; | |
1095 | ||
1096 | list_add(&map->node, &md->maps); | |
1097 | ||
1098 | return 0; | |
1099 | } | |
1100 | ||
8e0cf965 AH |
1101 | static int dso__load_kcore(struct dso *dso, struct map *map, |
1102 | const char *kallsyms_filename) | |
1103 | { | |
ba92732e WN |
1104 | struct map_groups *kmaps = map__kmaps(map); |
1105 | struct machine *machine; | |
8e0cf965 AH |
1106 | struct kcore_mapfn_data md; |
1107 | struct map *old_map, *new_map, *replacement_map = NULL; | |
1108 | bool is_64_bit; | |
1109 | int err, fd; | |
1110 | char kcore_filename[PATH_MAX]; | |
1111 | struct symbol *sym; | |
1112 | ||
ba92732e WN |
1113 | if (!kmaps) |
1114 | return -EINVAL; | |
1115 | ||
1116 | machine = kmaps->machine; | |
1117 | ||
8e0cf965 AH |
1118 | /* This function requires that the map is the kernel map */ |
1119 | if (map != machine->vmlinux_maps[map->type]) | |
1120 | return -EINVAL; | |
1121 | ||
52afdaf9 AH |
1122 | if (!filename_from_kallsyms_filename(kcore_filename, "kcore", |
1123 | kallsyms_filename)) | |
1124 | return -EINVAL; | |
1125 | ||
a00d28cb AH |
1126 | /* Modules and kernel must be present at their original addresses */ |
1127 | if (validate_kcore_addresses(kallsyms_filename, map)) | |
8e0cf965 AH |
1128 | return -EINVAL; |
1129 | ||
1130 | md.dso = dso; | |
1131 | md.type = map->type; | |
1132 | INIT_LIST_HEAD(&md.maps); | |
1133 | ||
1134 | fd = open(kcore_filename, O_RDONLY); | |
36c8bb56 LZ |
1135 | if (fd < 0) { |
1136 | pr_err("%s requires CAP_SYS_RAWIO capability to access.\n", | |
1137 | kcore_filename); | |
8e0cf965 | 1138 | return -EINVAL; |
36c8bb56 | 1139 | } |
8e0cf965 AH |
1140 | |
1141 | /* Read new maps into temporary lists */ | |
1142 | err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md, | |
1143 | &is_64_bit); | |
1144 | if (err) | |
1145 | goto out_err; | |
c6d8f2a4 | 1146 | dso->is_64_bit = is_64_bit; |
8e0cf965 AH |
1147 | |
1148 | if (list_empty(&md.maps)) { | |
1149 | err = -EINVAL; | |
1150 | goto out_err; | |
1151 | } | |
1152 | ||
1153 | /* Remove old maps */ | |
1154 | old_map = map_groups__first(kmaps, map->type); | |
1155 | while (old_map) { | |
1156 | struct map *next = map_groups__next(old_map); | |
1157 | ||
1158 | if (old_map != map) | |
1159 | map_groups__remove(kmaps, old_map); | |
1160 | old_map = next; | |
1161 | } | |
1162 | ||
1163 | /* Find the kernel map using the first symbol */ | |
1164 | sym = dso__first_symbol(dso, map->type); | |
1165 | list_for_each_entry(new_map, &md.maps, node) { | |
1166 | if (sym && sym->start >= new_map->start && | |
1167 | sym->start < new_map->end) { | |
1168 | replacement_map = new_map; | |
1169 | break; | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | if (!replacement_map) | |
1174 | replacement_map = list_entry(md.maps.next, struct map, node); | |
1175 | ||
1176 | /* Add new maps */ | |
1177 | while (!list_empty(&md.maps)) { | |
1178 | new_map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1179 | list_del_init(&new_map->node); |
8e0cf965 AH |
1180 | if (new_map == replacement_map) { |
1181 | map->start = new_map->start; | |
1182 | map->end = new_map->end; | |
1183 | map->pgoff = new_map->pgoff; | |
1184 | map->map_ip = new_map->map_ip; | |
1185 | map->unmap_ip = new_map->unmap_ip; | |
8e0cf965 | 1186 | /* Ensure maps are correctly ordered */ |
84c2cafa | 1187 | map__get(map); |
8e0cf965 AH |
1188 | map_groups__remove(kmaps, map); |
1189 | map_groups__insert(kmaps, map); | |
84c2cafa | 1190 | map__put(map); |
8e0cf965 AH |
1191 | } else { |
1192 | map_groups__insert(kmaps, new_map); | |
1193 | } | |
84c2cafa ACM |
1194 | |
1195 | map__put(new_map); | |
8e0cf965 AH |
1196 | } |
1197 | ||
1198 | /* | |
1199 | * Set the data type and long name so that kcore can be read via | |
1200 | * dso__data_read_addr(). | |
1201 | */ | |
1202 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
5f70619d | 1203 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE; |
8e0cf965 | 1204 | else |
5f70619d | 1205 | dso->binary_type = DSO_BINARY_TYPE__KCORE; |
7e155d4d | 1206 | dso__set_long_name(dso, strdup(kcore_filename), true); |
8e0cf965 AH |
1207 | |
1208 | close(fd); | |
1209 | ||
1210 | if (map->type == MAP__FUNCTION) | |
1211 | pr_debug("Using %s for kernel object code\n", kcore_filename); | |
1212 | else | |
1213 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
1214 | ||
1215 | return 0; | |
1216 | ||
1217 | out_err: | |
1218 | while (!list_empty(&md.maps)) { | |
1219 | map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1220 | list_del_init(&map->node); |
84c2cafa | 1221 | map__put(map); |
8e0cf965 AH |
1222 | } |
1223 | close(fd); | |
1224 | return -EINVAL; | |
1225 | } | |
1226 | ||
d9b62aba AH |
1227 | /* |
1228 | * If the kernel is relocated at boot time, kallsyms won't match. Compute the | |
1229 | * delta based on the relocation reference symbol. | |
1230 | */ | |
1231 | static int kallsyms__delta(struct map *map, const char *filename, u64 *delta) | |
1232 | { | |
1233 | struct kmap *kmap = map__kmap(map); | |
1234 | u64 addr; | |
1235 | ||
ba92732e WN |
1236 | if (!kmap) |
1237 | return -1; | |
1238 | ||
d9b62aba AH |
1239 | if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name) |
1240 | return 0; | |
1241 | ||
1242 | addr = kallsyms__get_function_start(filename, | |
1243 | kmap->ref_reloc_sym->name); | |
1244 | if (!addr) | |
1245 | return -1; | |
1246 | ||
1247 | *delta = addr - kmap->ref_reloc_sym->addr; | |
1248 | return 0; | |
1249 | } | |
1250 | ||
aeafcbaf | 1251 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 1252 | struct map *map, symbol_filter_t filter) |
2e538c4a | 1253 | { |
d9b62aba AH |
1254 | u64 delta = 0; |
1255 | ||
ec80fde7 ACM |
1256 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1257 | return -1; | |
1258 | ||
aeafcbaf | 1259 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
1260 | return -1; |
1261 | ||
d9b62aba AH |
1262 | if (kallsyms__delta(map, filename, &delta)) |
1263 | return -1; | |
1264 | ||
694bf407 | 1265 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
1266 | symbols__fixup_end(&dso->symbols[map->type]); |
1267 | ||
aeafcbaf | 1268 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 1269 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 1270 | else |
44f24cb3 | 1271 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 1272 | |
8e0cf965 AH |
1273 | if (!dso__load_kcore(dso, map, filename)) |
1274 | return dso__split_kallsyms_for_kcore(dso, map, filter); | |
1275 | else | |
d9b62aba | 1276 | return dso__split_kallsyms(dso, map, delta, filter); |
af427bf5 ACM |
1277 | } |
1278 | ||
aeafcbaf | 1279 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 1280 | symbol_filter_t filter) |
80d496be PE |
1281 | { |
1282 | char *line = NULL; | |
1283 | size_t n; | |
1284 | FILE *file; | |
1285 | int nr_syms = 0; | |
1286 | ||
aeafcbaf | 1287 | file = fopen(dso->long_name, "r"); |
80d496be PE |
1288 | if (file == NULL) |
1289 | goto out_failure; | |
1290 | ||
1291 | while (!feof(file)) { | |
9cffa8d5 | 1292 | u64 start, size; |
80d496be PE |
1293 | struct symbol *sym; |
1294 | int line_len, len; | |
1295 | ||
1296 | line_len = getline(&line, &n, file); | |
1297 | if (line_len < 0) | |
1298 | break; | |
1299 | ||
1300 | if (!line) | |
1301 | goto out_failure; | |
1302 | ||
1303 | line[--line_len] = '\0'; /* \n */ | |
1304 | ||
1305 | len = hex2u64(line, &start); | |
1306 | ||
1307 | len++; | |
1308 | if (len + 2 >= line_len) | |
1309 | continue; | |
1310 | ||
1311 | len += hex2u64(line + len, &size); | |
1312 | ||
1313 | len++; | |
1314 | if (len + 2 >= line_len) | |
1315 | continue; | |
1316 | ||
c408fedf | 1317 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
1318 | |
1319 | if (sym == NULL) | |
1320 | goto out_delete_line; | |
1321 | ||
439d473b | 1322 | if (filter && filter(map, sym)) |
00a192b3 | 1323 | symbol__delete(sym); |
80d496be | 1324 | else { |
aeafcbaf | 1325 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
1326 | nr_syms++; |
1327 | } | |
1328 | } | |
1329 | ||
1330 | free(line); | |
1331 | fclose(file); | |
1332 | ||
1333 | return nr_syms; | |
1334 | ||
1335 | out_delete_line: | |
1336 | free(line); | |
1337 | out_failure: | |
1338 | return -1; | |
1339 | } | |
1340 | ||
1029f9fe NK |
1341 | static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod, |
1342 | enum dso_binary_type type) | |
1343 | { | |
1344 | switch (type) { | |
1345 | case DSO_BINARY_TYPE__JAVA_JIT: | |
1346 | case DSO_BINARY_TYPE__DEBUGLINK: | |
1347 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
1348 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
1349 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
1350 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: | |
1351 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: | |
1352 | return !kmod && dso->kernel == DSO_TYPE_USER; | |
1353 | ||
1354 | case DSO_BINARY_TYPE__KALLSYMS: | |
1355 | case DSO_BINARY_TYPE__VMLINUX: | |
1356 | case DSO_BINARY_TYPE__KCORE: | |
1357 | return dso->kernel == DSO_TYPE_KERNEL; | |
1358 | ||
1359 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
1360 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
1361 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
1362 | return dso->kernel == DSO_TYPE_GUEST_KERNEL; | |
1363 | ||
1364 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 1365 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
1029f9fe | 1366 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: |
c00c48fc | 1367 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
1029f9fe NK |
1368 | /* |
1369 | * kernel modules know their symtab type - it's set when | |
9f2de315 | 1370 | * creating a module dso in machine__findnew_module_map(). |
1029f9fe NK |
1371 | */ |
1372 | return kmod && dso->symtab_type == type; | |
1373 | ||
1374 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
1375 | return true; | |
1376 | ||
1377 | case DSO_BINARY_TYPE__NOT_FOUND: | |
1378 | default: | |
1379 | return false; | |
1380 | } | |
1381 | } | |
1382 | ||
aeafcbaf | 1383 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1384 | { |
c338aee8 | 1385 | char *name; |
a2928c42 | 1386 | int ret = -1; |
44f24cb3 | 1387 | u_int i; |
23346f21 | 1388 | struct machine *machine; |
44f24cb3 | 1389 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1390 | int ss_pos = 0; |
1391 | struct symsrc ss_[2]; | |
1392 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
1029f9fe | 1393 | bool kmod; |
a2928c42 | 1394 | |
4a936edc NK |
1395 | pthread_mutex_lock(&dso->lock); |
1396 | ||
1397 | /* check again under the dso->lock */ | |
1398 | if (dso__loaded(dso, map->type)) { | |
1399 | ret = 1; | |
1400 | goto out; | |
1401 | } | |
66bd8424 | 1402 | |
4a936edc NK |
1403 | if (dso->kernel) { |
1404 | if (dso->kernel == DSO_TYPE_KERNEL) | |
1405 | ret = dso__load_kernel_sym(dso, map, filter); | |
1406 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1407 | ret = dso__load_guest_kernel_sym(dso, map, filter); | |
1408 | ||
1409 | goto out; | |
1410 | } | |
a1645ce1 | 1411 | |
23346f21 ACM |
1412 | if (map->groups && map->groups->machine) |
1413 | machine = map->groups->machine; | |
a1645ce1 | 1414 | else |
23346f21 | 1415 | machine = NULL; |
c338aee8 | 1416 | |
aeafcbaf | 1417 | dso->adjust_symbols = 0; |
f5812a7a | 1418 | |
aeafcbaf | 1419 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1420 | struct stat st; |
1421 | ||
e9b52ef2 | 1422 | if (lstat(dso->name, &st) < 0) |
4a936edc | 1423 | goto out; |
981c1252 PE |
1424 | |
1425 | if (st.st_uid && (st.st_uid != geteuid())) { | |
1426 | pr_warning("File %s not owned by current user or root, " | |
1427 | "ignoring it.\n", dso->name); | |
4a936edc | 1428 | goto out; |
981c1252 PE |
1429 | } |
1430 | ||
aeafcbaf | 1431 | ret = dso__load_perf_map(dso, map, filter); |
44f24cb3 JO |
1432 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1433 | DSO_BINARY_TYPE__NOT_FOUND; | |
4a936edc | 1434 | goto out; |
94cb9e38 ACM |
1435 | } |
1436 | ||
44f24cb3 JO |
1437 | if (machine) |
1438 | root_dir = machine->root_dir; | |
1439 | ||
164c800e DA |
1440 | name = malloc(PATH_MAX); |
1441 | if (!name) | |
4a936edc | 1442 | goto out; |
164c800e | 1443 | |
1029f9fe | 1444 | kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || |
c00c48fc NK |
1445 | dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || |
1446 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE || | |
1447 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
1029f9fe NK |
1448 | |
1449 | /* | |
1450 | * Iterate over candidate debug images. | |
3aafe5ae CS |
1451 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1452 | * and/or opd section) for processing. | |
6da80ce8 | 1453 | */ |
44f24cb3 | 1454 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1455 | struct symsrc *ss = &ss_[ss_pos]; |
1456 | bool next_slot = false; | |
6da80ce8 | 1457 | |
005f9294 | 1458 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1459 | |
1029f9fe NK |
1460 | if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type)) |
1461 | continue; | |
1462 | ||
ee4e9625 ACM |
1463 | if (dso__read_binary_type_filename(dso, symtab_type, |
1464 | root_dir, name, PATH_MAX)) | |
44f24cb3 | 1465 | continue; |
6da80ce8 DM |
1466 | |
1467 | /* Name is now the name of the next image to try */ | |
3aafe5ae | 1468 | if (symsrc__init(ss, dso, name, symtab_type) < 0) |
6da80ce8 | 1469 | continue; |
a2928c42 | 1470 | |
3aafe5ae CS |
1471 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1472 | syms_ss = ss; | |
1473 | next_slot = true; | |
0058aef6 AH |
1474 | if (!dso->symsrc_filename) |
1475 | dso->symsrc_filename = strdup(name); | |
d26cd12b CS |
1476 | } |
1477 | ||
3aafe5ae CS |
1478 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1479 | runtime_ss = ss; | |
1480 | next_slot = true; | |
a44f605b | 1481 | } |
a2928c42 | 1482 | |
3aafe5ae CS |
1483 | if (next_slot) { |
1484 | ss_pos++; | |
33ff581e | 1485 | |
3aafe5ae CS |
1486 | if (syms_ss && runtime_ss) |
1487 | break; | |
98e9f03b NK |
1488 | } else { |
1489 | symsrc__destroy(ss); | |
6da80ce8 | 1490 | } |
3aafe5ae | 1491 | |
a25e46c4 | 1492 | } |
6da80ce8 | 1493 | |
3aafe5ae CS |
1494 | if (!runtime_ss && !syms_ss) |
1495 | goto out_free; | |
1496 | ||
1497 | if (runtime_ss && !syms_ss) { | |
1498 | syms_ss = runtime_ss; | |
1499 | } | |
1500 | ||
1501 | /* We'll have to hope for the best */ | |
1502 | if (!runtime_ss && syms_ss) | |
1503 | runtime_ss = syms_ss; | |
1504 | ||
1029f9fe NK |
1505 | if (syms_ss) |
1506 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, kmod); | |
1507 | else | |
3aafe5ae CS |
1508 | ret = -1; |
1509 | ||
f47b58b7 | 1510 | if (ret > 0) { |
3aafe5ae CS |
1511 | int nr_plt; |
1512 | ||
1513 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map, filter); | |
1514 | if (nr_plt > 0) | |
1515 | ret += nr_plt; | |
60e4b10c ACM |
1516 | } |
1517 | ||
3aafe5ae CS |
1518 | for (; ss_pos > 0; ss_pos--) |
1519 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1520 | out_free: | |
a2928c42 | 1521 | free(name); |
aeafcbaf | 1522 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
4a936edc NK |
1523 | ret = 0; |
1524 | out: | |
1525 | dso__set_loaded(dso, map->type); | |
1526 | pthread_mutex_unlock(&dso->lock); | |
1527 | ||
a2928c42 ACM |
1528 | return ret; |
1529 | } | |
1530 | ||
aeafcbaf | 1531 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1532 | enum map_type type, const char *name) |
439d473b | 1533 | { |
1eee78ae | 1534 | struct maps *maps = &mg->maps[type]; |
4bb7123d | 1535 | struct map *map; |
439d473b | 1536 | |
6a2ffcdd ACM |
1537 | pthread_rwlock_rdlock(&maps->lock); |
1538 | ||
4bb7123d | 1539 | for (map = maps__first(maps); map; map = map__next(map)) { |
b7cece76 | 1540 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
6a2ffcdd | 1541 | goto out_unlock; |
439d473b ACM |
1542 | } |
1543 | ||
6a2ffcdd ACM |
1544 | map = NULL; |
1545 | ||
1546 | out_unlock: | |
1547 | pthread_rwlock_unlock(&maps->lock); | |
1548 | return map; | |
439d473b ACM |
1549 | } |
1550 | ||
aeafcbaf | 1551 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
5230fb7d ACM |
1552 | const char *vmlinux, bool vmlinux_allocated, |
1553 | symbol_filter_t filter) | |
a2928c42 | 1554 | { |
b68e2f91 CS |
1555 | int err = -1; |
1556 | struct symsrc ss; | |
ec5761ea | 1557 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1558 | enum dso_binary_type symtab_type; |
a2928c42 | 1559 | |
5698d2c9 NK |
1560 | if (vmlinux[0] == '/') |
1561 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1562 | else | |
972f393b | 1563 | symbol__join_symfs(symfs_vmlinux, vmlinux); |
a2928c42 | 1564 | |
21ea4539 | 1565 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1566 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1567 | else |
005f9294 | 1568 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1569 | |
005f9294 | 1570 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1571 | return -1; |
1572 | ||
261360b6 | 1573 | err = dso__load_sym(dso, map, &ss, &ss, filter, 0); |
b68e2f91 | 1574 | symsrc__destroy(&ss); |
a2928c42 | 1575 | |
515850e4 | 1576 | if (err > 0) { |
39b12f78 | 1577 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
5f70619d | 1578 | dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
39b12f78 | 1579 | else |
5f70619d | 1580 | dso->binary_type = DSO_BINARY_TYPE__VMLINUX; |
bf4414ae | 1581 | dso__set_long_name(dso, vmlinux, vmlinux_allocated); |
515850e4 | 1582 | dso__set_loaded(dso, map->type); |
ec5761ea | 1583 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1584 | } |
3846df2e | 1585 | |
a2928c42 ACM |
1586 | return err; |
1587 | } | |
1588 | ||
aeafcbaf | 1589 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 1590 | symbol_filter_t filter) |
a19afe46 ACM |
1591 | { |
1592 | int i, err = 0; | |
00dc8657 | 1593 | char *filename = NULL; |
a19afe46 | 1594 | |
00dc8657 NK |
1595 | if (!symbol_conf.ignore_vmlinux_buildid) |
1596 | filename = dso__build_id_filename(dso, NULL, 0); | |
5ad90e4e | 1597 | if (filename != NULL) { |
5230fb7d ACM |
1598 | err = dso__load_vmlinux(dso, map, filename, true, filter); |
1599 | if (err > 0) | |
5ad90e4e | 1600 | goto out; |
5ad90e4e ACM |
1601 | free(filename); |
1602 | } | |
a19afe46 | 1603 | |
00dc8657 NK |
1604 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", |
1605 | vmlinux_path__nr_entries + 1); | |
1606 | ||
a19afe46 | 1607 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { |
5230fb7d ACM |
1608 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], false, filter); |
1609 | if (err > 0) | |
a19afe46 | 1610 | break; |
a19afe46 | 1611 | } |
5ad90e4e | 1612 | out: |
a19afe46 ACM |
1613 | return err; |
1614 | } | |
1615 | ||
0544d422 AH |
1616 | static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz) |
1617 | { | |
1618 | char kallsyms_filename[PATH_MAX]; | |
1619 | struct dirent *dent; | |
1620 | int ret = -1; | |
1621 | DIR *d; | |
1622 | ||
1623 | d = opendir(dir); | |
1624 | if (!d) | |
1625 | return -1; | |
1626 | ||
1627 | while (1) { | |
1628 | dent = readdir(d); | |
1629 | if (!dent) | |
1630 | break; | |
1631 | if (dent->d_type != DT_DIR) | |
1632 | continue; | |
1633 | scnprintf(kallsyms_filename, sizeof(kallsyms_filename), | |
1634 | "%s/%s/kallsyms", dir, dent->d_name); | |
a00d28cb | 1635 | if (!validate_kcore_addresses(kallsyms_filename, map)) { |
0544d422 AH |
1636 | strlcpy(dir, kallsyms_filename, dir_sz); |
1637 | ret = 0; | |
1638 | break; | |
1639 | } | |
1640 | } | |
1641 | ||
1642 | closedir(d); | |
1643 | ||
1644 | return ret; | |
1645 | } | |
1646 | ||
1647 | static char *dso__find_kallsyms(struct dso *dso, struct map *map) | |
1648 | { | |
1649 | u8 host_build_id[BUILD_ID_SIZE]; | |
1650 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
1651 | bool is_host = false; | |
1652 | char path[PATH_MAX]; | |
1653 | ||
1654 | if (!dso->has_build_id) { | |
1655 | /* | |
1656 | * Last resort, if we don't have a build-id and couldn't find | |
1657 | * any vmlinux file, try the running kernel kallsyms table. | |
1658 | */ | |
1659 | goto proc_kallsyms; | |
1660 | } | |
1661 | ||
1662 | if (sysfs__read_build_id("/sys/kernel/notes", host_build_id, | |
1663 | sizeof(host_build_id)) == 0) | |
1664 | is_host = dso__build_id_equal(dso, host_build_id); | |
1665 | ||
1666 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
1667 | ||
449867e3 AH |
1668 | scnprintf(path, sizeof(path), "%s/[kernel.kcore]/%s", buildid_dir, |
1669 | sbuild_id); | |
1670 | ||
0544d422 AH |
1671 | /* Use /proc/kallsyms if possible */ |
1672 | if (is_host) { | |
1673 | DIR *d; | |
1674 | int fd; | |
1675 | ||
1676 | /* If no cached kcore go with /proc/kallsyms */ | |
0544d422 AH |
1677 | d = opendir(path); |
1678 | if (!d) | |
1679 | goto proc_kallsyms; | |
1680 | closedir(d); | |
1681 | ||
1682 | /* | |
1683 | * Do not check the build-id cache, until we know we cannot use | |
1684 | * /proc/kcore. | |
1685 | */ | |
1686 | fd = open("/proc/kcore", O_RDONLY); | |
1687 | if (fd != -1) { | |
1688 | close(fd); | |
1689 | /* If module maps match go with /proc/kallsyms */ | |
a00d28cb | 1690 | if (!validate_kcore_addresses("/proc/kallsyms", map)) |
0544d422 AH |
1691 | goto proc_kallsyms; |
1692 | } | |
1693 | ||
1694 | /* Find kallsyms in build-id cache with kcore */ | |
1695 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1696 | return strdup(path); | |
1697 | ||
1698 | goto proc_kallsyms; | |
1699 | } | |
1700 | ||
449867e3 AH |
1701 | /* Find kallsyms in build-id cache with kcore */ |
1702 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1703 | return strdup(path); | |
1704 | ||
0544d422 AH |
1705 | scnprintf(path, sizeof(path), "%s/[kernel.kallsyms]/%s", |
1706 | buildid_dir, sbuild_id); | |
1707 | ||
1708 | if (access(path, F_OK)) { | |
1709 | pr_err("No kallsyms or vmlinux with build-id %s was found\n", | |
1710 | sbuild_id); | |
1711 | return NULL; | |
1712 | } | |
1713 | ||
1714 | return strdup(path); | |
1715 | ||
1716 | proc_kallsyms: | |
1717 | return strdup("/proc/kallsyms"); | |
1718 | } | |
1719 | ||
aeafcbaf | 1720 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 1721 | symbol_filter_t filter) |
a827c875 | 1722 | { |
cc612d81 | 1723 | int err; |
9e201442 ACM |
1724 | const char *kallsyms_filename = NULL; |
1725 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1726 | /* |
b226a5a7 DA |
1727 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1728 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1729 | * |
1730 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1731 | * build-id, or if the user specifies the wrong path to the right | |
1732 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1733 | * x86_86 one, on the machine where analysis is being performed, say), | |
1734 | * or worse, /proc/kallsyms. | |
1735 | * | |
1736 | * If the specified file _has_ a build-id and there is a build-id | |
1737 | * section in the perf.data file, we will still do the expected | |
1738 | * validation in dso__load_vmlinux and will bail out if they don't | |
1739 | * match. | |
1740 | */ | |
b226a5a7 DA |
1741 | if (symbol_conf.kallsyms_name != NULL) { |
1742 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1743 | goto do_kallsyms; | |
1744 | } | |
1745 | ||
fc2be696 | 1746 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
5230fb7d ACM |
1747 | return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, |
1748 | false, filter); | |
dc8d6ab2 | 1749 | } |
cc612d81 | 1750 | |
fc2be696 | 1751 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
aeafcbaf | 1752 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 | 1753 | if (err > 0) |
39b12f78 | 1754 | return err; |
cc612d81 ACM |
1755 | } |
1756 | ||
ec5761ea DA |
1757 | /* do not try local files if a symfs was given */ |
1758 | if (symbol_conf.symfs[0] != 0) | |
1759 | return -1; | |
1760 | ||
0544d422 AH |
1761 | kallsyms_allocated_filename = dso__find_kallsyms(dso, map); |
1762 | if (!kallsyms_allocated_filename) | |
1763 | return -1; | |
19fc2ded | 1764 | |
0544d422 | 1765 | kallsyms_filename = kallsyms_allocated_filename; |
439d473b | 1766 | |
cc612d81 | 1767 | do_kallsyms: |
aeafcbaf | 1768 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
1769 | if (err > 0) |
1770 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1771 | free(kallsyms_allocated_filename); |
439d473b | 1772 | |
8e0cf965 | 1773 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1774 | dso->binary_type = DSO_BINARY_TYPE__KALLSYMS; |
bf4414ae | 1775 | dso__set_long_name(dso, "[kernel.kallsyms]", false); |
6a4694a4 ACM |
1776 | map__fixup_start(map); |
1777 | map__fixup_end(map); | |
439d473b | 1778 | } |
94cb9e38 | 1779 | |
a827c875 ACM |
1780 | return err; |
1781 | } | |
1782 | ||
aeafcbaf ACM |
1783 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
1784 | symbol_filter_t filter) | |
a1645ce1 ZY |
1785 | { |
1786 | int err; | |
1787 | const char *kallsyms_filename = NULL; | |
23346f21 | 1788 | struct machine *machine; |
a1645ce1 ZY |
1789 | char path[PATH_MAX]; |
1790 | ||
1791 | if (!map->groups) { | |
1792 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1793 | return -1; | |
1794 | } | |
23346f21 | 1795 | machine = map->groups->machine; |
a1645ce1 | 1796 | |
23346f21 | 1797 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1798 | /* |
1799 | * if the user specified a vmlinux filename, use it and only | |
1800 | * it, reporting errors to the user if it cannot be used. | |
1801 | * Or use file guest_kallsyms inputted by user on commandline | |
1802 | */ | |
1803 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1804 | err = dso__load_vmlinux(dso, map, |
5230fb7d ACM |
1805 | symbol_conf.default_guest_vmlinux_name, |
1806 | false, filter); | |
39b12f78 | 1807 | return err; |
a1645ce1 ZY |
1808 | } |
1809 | ||
1810 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1811 | if (!kallsyms_filename) | |
1812 | return -1; | |
1813 | } else { | |
23346f21 | 1814 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1815 | kallsyms_filename = path; |
1816 | } | |
1817 | ||
aeafcbaf | 1818 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
8e0cf965 | 1819 | if (err > 0) |
39b12f78 | 1820 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 1821 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1822 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
39b12f78 | 1823 | machine__mmap_name(machine, path, sizeof(path)); |
7e155d4d | 1824 | dso__set_long_name(dso, strdup(path), true); |
a1645ce1 ZY |
1825 | map__fixup_start(map); |
1826 | map__fixup_end(map); | |
1827 | } | |
1828 | ||
1829 | return err; | |
1830 | } | |
cd84c2ac | 1831 | |
cc612d81 ACM |
1832 | static void vmlinux_path__exit(void) |
1833 | { | |
04662523 ACM |
1834 | while (--vmlinux_path__nr_entries >= 0) |
1835 | zfree(&vmlinux_path[vmlinux_path__nr_entries]); | |
c4f03547 | 1836 | vmlinux_path__nr_entries = 0; |
cc612d81 | 1837 | |
04662523 | 1838 | zfree(&vmlinux_path); |
cc612d81 ACM |
1839 | } |
1840 | ||
0a7e6d1b | 1841 | static int vmlinux_path__init(struct perf_session_env *env) |
cc612d81 ACM |
1842 | { |
1843 | struct utsname uts; | |
1844 | char bf[PATH_MAX]; | |
0a7e6d1b | 1845 | char *kernel_version; |
cc612d81 | 1846 | |
c657f423 | 1847 | vmlinux_path = malloc(sizeof(char *) * 6); |
cc612d81 ACM |
1848 | if (vmlinux_path == NULL) |
1849 | return -1; | |
1850 | ||
1851 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
1852 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1853 | goto out_fail; | |
1854 | ++vmlinux_path__nr_entries; | |
1855 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
1856 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1857 | goto out_fail; | |
1858 | ++vmlinux_path__nr_entries; | |
ec5761ea | 1859 | |
0a7e6d1b | 1860 | /* only try kernel version if no symfs was given */ |
ec5761ea DA |
1861 | if (symbol_conf.symfs[0] != 0) |
1862 | return 0; | |
1863 | ||
0a7e6d1b NK |
1864 | if (env) { |
1865 | kernel_version = env->os_release; | |
1866 | } else { | |
1867 | if (uname(&uts) < 0) | |
1868 | goto out_fail; | |
1869 | ||
1870 | kernel_version = uts.release; | |
1871 | } | |
ec5761ea | 1872 | |
0a7e6d1b | 1873 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", kernel_version); |
cc612d81 ACM |
1874 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); |
1875 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1876 | goto out_fail; | |
1877 | ++vmlinux_path__nr_entries; | |
c657f423 AB |
1878 | snprintf(bf, sizeof(bf), "/usr/lib/debug/boot/vmlinux-%s", |
1879 | kernel_version); | |
1880 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1881 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1882 | goto out_fail; | |
1883 | ++vmlinux_path__nr_entries; | |
0a7e6d1b | 1884 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", kernel_version); |
cc612d81 ACM |
1885 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); |
1886 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1887 | goto out_fail; | |
1888 | ++vmlinux_path__nr_entries; | |
1889 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
0a7e6d1b | 1890 | kernel_version); |
cc612d81 ACM |
1891 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); |
1892 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1893 | goto out_fail; | |
1894 | ++vmlinux_path__nr_entries; | |
1895 | ||
1896 | return 0; | |
1897 | ||
1898 | out_fail: | |
1899 | vmlinux_path__exit(); | |
1900 | return -1; | |
1901 | } | |
1902 | ||
3bfe5f81 | 1903 | int setup_list(struct strlist **list, const char *list_str, |
655000e7 ACM |
1904 | const char *list_name) |
1905 | { | |
1906 | if (list_str == NULL) | |
1907 | return 0; | |
1908 | ||
1909 | *list = strlist__new(true, list_str); | |
1910 | if (!*list) { | |
1911 | pr_err("problems parsing %s list\n", list_name); | |
1912 | return -1; | |
1913 | } | |
0bc2f2f7 ACM |
1914 | |
1915 | symbol_conf.has_filter = true; | |
655000e7 ACM |
1916 | return 0; |
1917 | } | |
1918 | ||
e03eaa40 DA |
1919 | int setup_intlist(struct intlist **list, const char *list_str, |
1920 | const char *list_name) | |
1921 | { | |
1922 | if (list_str == NULL) | |
1923 | return 0; | |
1924 | ||
1925 | *list = intlist__new(list_str); | |
1926 | if (!*list) { | |
1927 | pr_err("problems parsing %s list\n", list_name); | |
1928 | return -1; | |
1929 | } | |
1930 | return 0; | |
1931 | } | |
1932 | ||
ec80fde7 ACM |
1933 | static bool symbol__read_kptr_restrict(void) |
1934 | { | |
1935 | bool value = false; | |
1936 | ||
1937 | if (geteuid() != 0) { | |
1938 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
1939 | if (fp != NULL) { | |
1940 | char line[8]; | |
1941 | ||
1942 | if (fgets(line, sizeof(line), fp) != NULL) | |
1943 | value = atoi(line) != 0; | |
1944 | ||
1945 | fclose(fp); | |
1946 | } | |
1947 | } | |
1948 | ||
1949 | return value; | |
1950 | } | |
1951 | ||
0a7e6d1b | 1952 | int symbol__init(struct perf_session_env *env) |
2446042c | 1953 | { |
ec5761ea DA |
1954 | const char *symfs; |
1955 | ||
85e00b55 JZ |
1956 | if (symbol_conf.initialized) |
1957 | return 0; | |
1958 | ||
9ac3e487 | 1959 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 1960 | |
166ccc9c NK |
1961 | symbol__elf_init(); |
1962 | ||
75be6cf4 ACM |
1963 | if (symbol_conf.sort_by_name) |
1964 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
1965 | sizeof(struct symbol)); | |
b32d133a | 1966 | |
0a7e6d1b | 1967 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0) |
2446042c ACM |
1968 | return -1; |
1969 | ||
c410a338 ACM |
1970 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
1971 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
1972 | return -1; | |
1973 | } | |
1974 | ||
655000e7 ACM |
1975 | if (setup_list(&symbol_conf.dso_list, |
1976 | symbol_conf.dso_list_str, "dso") < 0) | |
1977 | return -1; | |
1978 | ||
1979 | if (setup_list(&symbol_conf.comm_list, | |
1980 | symbol_conf.comm_list_str, "comm") < 0) | |
1981 | goto out_free_dso_list; | |
1982 | ||
e03eaa40 DA |
1983 | if (setup_intlist(&symbol_conf.pid_list, |
1984 | symbol_conf.pid_list_str, "pid") < 0) | |
1985 | goto out_free_comm_list; | |
1986 | ||
1987 | if (setup_intlist(&symbol_conf.tid_list, | |
1988 | symbol_conf.tid_list_str, "tid") < 0) | |
1989 | goto out_free_pid_list; | |
1990 | ||
655000e7 ACM |
1991 | if (setup_list(&symbol_conf.sym_list, |
1992 | symbol_conf.sym_list_str, "symbol") < 0) | |
e03eaa40 | 1993 | goto out_free_tid_list; |
655000e7 | 1994 | |
ec5761ea DA |
1995 | /* |
1996 | * A path to symbols of "/" is identical to "" | |
1997 | * reset here for simplicity. | |
1998 | */ | |
1999 | symfs = realpath(symbol_conf.symfs, NULL); | |
2000 | if (symfs == NULL) | |
2001 | symfs = symbol_conf.symfs; | |
2002 | if (strcmp(symfs, "/") == 0) | |
2003 | symbol_conf.symfs = ""; | |
2004 | if (symfs != symbol_conf.symfs) | |
2005 | free((void *)symfs); | |
2006 | ||
ec80fde7 ACM |
2007 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2008 | ||
85e00b55 | 2009 | symbol_conf.initialized = true; |
4aa65636 | 2010 | return 0; |
655000e7 | 2011 | |
e03eaa40 DA |
2012 | out_free_tid_list: |
2013 | intlist__delete(symbol_conf.tid_list); | |
2014 | out_free_pid_list: | |
2015 | intlist__delete(symbol_conf.pid_list); | |
655000e7 ACM |
2016 | out_free_comm_list: |
2017 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
2018 | out_free_dso_list: |
2019 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 2020 | return -1; |
4aa65636 ACM |
2021 | } |
2022 | ||
d65a458b ACM |
2023 | void symbol__exit(void) |
2024 | { | |
85e00b55 JZ |
2025 | if (!symbol_conf.initialized) |
2026 | return; | |
d65a458b ACM |
2027 | strlist__delete(symbol_conf.sym_list); |
2028 | strlist__delete(symbol_conf.dso_list); | |
2029 | strlist__delete(symbol_conf.comm_list); | |
e03eaa40 DA |
2030 | intlist__delete(symbol_conf.tid_list); |
2031 | intlist__delete(symbol_conf.pid_list); | |
d65a458b ACM |
2032 | vmlinux_path__exit(); |
2033 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 2034 | symbol_conf.initialized = false; |
d65a458b | 2035 | } |