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 | ||
c0b4dffb ACM |
444 | void dso__reset_find_symbol_cache(struct dso *dso) |
445 | { | |
446 | enum map_type type; | |
447 | ||
448 | for (type = MAP__FUNCTION; type <= MAP__VARIABLE; ++type) { | |
449 | dso->last_find_result[type].addr = 0; | |
450 | dso->last_find_result[type].symbol = NULL; | |
451 | } | |
452 | } | |
453 | ||
aeafcbaf | 454 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 455 | enum map_type type, u64 addr) |
fcf1203a | 456 | { |
b685ac22 ACM |
457 | if (dso->last_find_result[type].addr != addr) { |
458 | dso->last_find_result[type].addr = addr; | |
459 | dso->last_find_result[type].symbol = symbols__find(&dso->symbols[type], addr); | |
460 | } | |
461 | ||
462 | return dso->last_find_result[type].symbol; | |
fcf1203a ACM |
463 | } |
464 | ||
9c00a81b | 465 | struct symbol *dso__first_symbol(struct dso *dso, enum map_type type) |
8e0cf965 AH |
466 | { |
467 | return symbols__first(&dso->symbols[type]); | |
9c00a81b AH |
468 | } |
469 | ||
470 | struct symbol *dso__next_symbol(struct symbol *sym) | |
471 | { | |
472 | return symbols__next(sym); | |
8e0cf965 AH |
473 | } |
474 | ||
18bd7264 ACM |
475 | struct symbol *symbol__next_by_name(struct symbol *sym) |
476 | { | |
477 | struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym); | |
478 | struct rb_node *n = rb_next(&s->rb_node); | |
479 | ||
480 | return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL; | |
481 | } | |
482 | ||
483 | /* | |
484 | * Teturns first symbol that matched with @name. | |
485 | */ | |
aeafcbaf | 486 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
487 | const char *name) |
488 | { | |
aeafcbaf | 489 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
490 | } |
491 | ||
aeafcbaf | 492 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 493 | { |
aeafcbaf ACM |
494 | dso__set_sorted_by_name(dso, type); |
495 | return symbols__sort_by_name(&dso->symbol_names[type], | |
496 | &dso->symbols[type]); | |
79406cd7 ACM |
497 | } |
498 | ||
aeafcbaf ACM |
499 | size_t dso__fprintf_symbols_by_name(struct dso *dso, |
500 | enum map_type type, FILE *fp) | |
90f18e63 SD |
501 | { |
502 | size_t ret = 0; | |
503 | struct rb_node *nd; | |
504 | struct symbol_name_rb_node *pos; | |
505 | ||
aeafcbaf | 506 | for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { |
90f18e63 SD |
507 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); |
508 | fprintf(fp, "%s\n", pos->sym.name); | |
509 | } | |
510 | ||
511 | return ret; | |
512 | } | |
513 | ||
316d70d6 AH |
514 | int modules__parse(const char *filename, void *arg, |
515 | int (*process_module)(void *arg, const char *name, | |
516 | u64 start)) | |
517 | { | |
518 | char *line = NULL; | |
519 | size_t n; | |
520 | FILE *file; | |
521 | int err = 0; | |
522 | ||
523 | file = fopen(filename, "r"); | |
524 | if (file == NULL) | |
525 | return -1; | |
526 | ||
527 | while (1) { | |
528 | char name[PATH_MAX]; | |
529 | u64 start; | |
530 | char *sep; | |
531 | ssize_t line_len; | |
532 | ||
533 | line_len = getline(&line, &n, file); | |
534 | if (line_len < 0) { | |
535 | if (feof(file)) | |
536 | break; | |
537 | err = -1; | |
538 | goto out; | |
539 | } | |
540 | ||
541 | if (!line) { | |
542 | err = -1; | |
543 | goto out; | |
544 | } | |
545 | ||
546 | line[--line_len] = '\0'; /* \n */ | |
547 | ||
548 | sep = strrchr(line, 'x'); | |
549 | if (sep == NULL) | |
550 | continue; | |
551 | ||
552 | hex2u64(sep + 1, &start); | |
553 | ||
554 | sep = strchr(line, ' '); | |
555 | if (sep == NULL) | |
556 | continue; | |
557 | ||
558 | *sep = '\0'; | |
559 | ||
560 | scnprintf(name, sizeof(name), "[%s]", line); | |
561 | ||
562 | err = process_module(arg, name, start); | |
563 | if (err) | |
564 | break; | |
565 | } | |
566 | out: | |
567 | free(line); | |
568 | fclose(file); | |
569 | return err; | |
570 | } | |
571 | ||
682b335a ACM |
572 | struct process_kallsyms_args { |
573 | struct map *map; | |
574 | struct dso *dso; | |
575 | }; | |
576 | ||
e7110b9f ACM |
577 | /* |
578 | * These are symbols in the kernel image, so make sure that | |
579 | * sym is from a kernel DSO. | |
580 | */ | |
82d1deb0 DA |
581 | bool symbol__is_idle(struct symbol *sym) |
582 | { | |
583 | const char * const idle_symbols[] = { | |
584 | "cpu_idle", | |
e0336ed6 | 585 | "cpu_startup_entry", |
82d1deb0 DA |
586 | "intel_idle", |
587 | "default_idle", | |
588 | "native_safe_halt", | |
589 | "enter_idle", | |
590 | "exit_idle", | |
591 | "mwait_idle", | |
592 | "mwait_idle_with_hints", | |
593 | "poll_idle", | |
594 | "ppc64_runlatch_off", | |
595 | "pseries_dedicated_idle_sleep", | |
596 | NULL | |
597 | }; | |
598 | ||
599 | int i; | |
600 | ||
601 | if (!sym) | |
602 | return false; | |
603 | ||
604 | for (i = 0; idle_symbols[i]; i++) { | |
605 | if (!strcmp(idle_symbols[i], sym->name)) | |
606 | return true; | |
607 | } | |
608 | ||
609 | return false; | |
610 | } | |
611 | ||
682b335a | 612 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 613 | char type, u64 start) |
682b335a ACM |
614 | { |
615 | struct symbol *sym; | |
616 | struct process_kallsyms_args *a = arg; | |
617 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
618 | ||
619 | if (!symbol_type__is_a(type, a->map->type)) | |
620 | return 0; | |
621 | ||
82151520 CS |
622 | /* |
623 | * module symbols are not sorted so we add all | |
624 | * symbols, setting length to 0, and rely on | |
625 | * symbols__fixup_end() to fix it up. | |
626 | */ | |
627 | sym = symbol__new(start, 0, kallsyms2elf_type(type), name); | |
682b335a ACM |
628 | if (sym == NULL) |
629 | return -ENOMEM; | |
630 | /* | |
631 | * We will pass the symbols to the filter later, in | |
632 | * map__split_kallsyms, when we have split the maps per module | |
633 | */ | |
634 | symbols__insert(root, sym); | |
a1645ce1 | 635 | |
682b335a ACM |
636 | return 0; |
637 | } | |
638 | ||
639 | /* | |
640 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
641 | * so that we can in the next step set the symbol ->end address and then | |
642 | * call kernel_maps__split_kallsyms. | |
643 | */ | |
aeafcbaf | 644 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 645 | struct map *map) |
682b335a | 646 | { |
aeafcbaf | 647 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 648 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
649 | } |
650 | ||
8e0cf965 AH |
651 | static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map, |
652 | symbol_filter_t filter) | |
653 | { | |
ba92732e | 654 | struct map_groups *kmaps = map__kmaps(map); |
8e0cf965 AH |
655 | struct map *curr_map; |
656 | struct symbol *pos; | |
657 | int count = 0, moved = 0; | |
658 | struct rb_root *root = &dso->symbols[map->type]; | |
659 | struct rb_node *next = rb_first(root); | |
660 | ||
ba92732e WN |
661 | if (!kmaps) |
662 | return -1; | |
663 | ||
8e0cf965 AH |
664 | while (next) { |
665 | char *module; | |
666 | ||
667 | pos = rb_entry(next, struct symbol, rb_node); | |
668 | next = rb_next(&pos->rb_node); | |
669 | ||
670 | module = strchr(pos->name, '\t'); | |
671 | if (module) | |
672 | *module = '\0'; | |
673 | ||
674 | curr_map = map_groups__find(kmaps, map->type, pos->start); | |
675 | ||
676 | if (!curr_map || (filter && filter(curr_map, pos))) { | |
facf3f06 | 677 | rb_erase_init(&pos->rb_node, root); |
8e0cf965 AH |
678 | symbol__delete(pos); |
679 | } else { | |
680 | pos->start -= curr_map->start - curr_map->pgoff; | |
681 | if (pos->end) | |
682 | pos->end -= curr_map->start - curr_map->pgoff; | |
683 | if (curr_map != map) { | |
facf3f06 | 684 | rb_erase_init(&pos->rb_node, root); |
8e0cf965 AH |
685 | symbols__insert( |
686 | &curr_map->dso->symbols[curr_map->type], | |
687 | pos); | |
688 | ++moved; | |
689 | } else { | |
690 | ++count; | |
691 | } | |
692 | } | |
693 | } | |
694 | ||
695 | /* Symbols have been adjusted */ | |
696 | dso->adjust_symbols = 1; | |
697 | ||
698 | return count + moved; | |
699 | } | |
700 | ||
2e538c4a ACM |
701 | /* |
702 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
703 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
704 | * the original ELF section names vmlinux have. | |
705 | */ | |
d9b62aba | 706 | static int dso__split_kallsyms(struct dso *dso, struct map *map, u64 delta, |
9de89fe7 | 707 | symbol_filter_t filter) |
2e538c4a | 708 | { |
ba92732e WN |
709 | struct map_groups *kmaps = map__kmaps(map); |
710 | struct machine *machine; | |
4e06255f | 711 | struct map *curr_map = map; |
2e538c4a | 712 | struct symbol *pos; |
48000a1a | 713 | int count = 0, moved = 0; |
aeafcbaf | 714 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 715 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
716 | int kernel_range = 0; |
717 | ||
ba92732e WN |
718 | if (!kmaps) |
719 | return -1; | |
720 | ||
721 | machine = kmaps->machine; | |
722 | ||
2e538c4a ACM |
723 | while (next) { |
724 | char *module; | |
725 | ||
726 | pos = rb_entry(next, struct symbol, rb_node); | |
727 | next = rb_next(&pos->rb_node); | |
728 | ||
729 | module = strchr(pos->name, '\t'); | |
730 | if (module) { | |
75be6cf4 | 731 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
732 | goto discard_symbol; |
733 | ||
2e538c4a ACM |
734 | *module++ = '\0'; |
735 | ||
b7cece76 | 736 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 737 | if (curr_map != map && |
aeafcbaf | 738 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 739 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
740 | /* |
741 | * We assume all symbols of a module are | |
742 | * continuous in * kallsyms, so curr_map | |
743 | * points to a module and all its | |
744 | * symbols are in its kmap. Mark it as | |
745 | * loaded. | |
746 | */ | |
747 | dso__set_loaded(curr_map->dso, | |
748 | curr_map->type); | |
749 | } | |
750 | ||
751 | curr_map = map_groups__find_by_name(kmaps, | |
752 | map->type, module); | |
4e06255f | 753 | if (curr_map == NULL) { |
2f51903b | 754 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 755 | "inconsistency while looking " |
a1645ce1 | 756 | "for \"%s\" module!\n", |
23346f21 | 757 | machine->root_dir, module); |
a1645ce1 ZY |
758 | curr_map = map; |
759 | goto discard_symbol; | |
af427bf5 | 760 | } |
b7cece76 | 761 | |
a1645ce1 | 762 | if (curr_map->dso->loaded && |
23346f21 | 763 | !machine__is_default_guest(machine)) |
b7cece76 | 764 | goto discard_symbol; |
af427bf5 | 765 | } |
2e538c4a ACM |
766 | /* |
767 | * So that we look just like we get from .ko files, | |
768 | * i.e. not prelinked, relative to map->start. | |
769 | */ | |
4e06255f ACM |
770 | pos->start = curr_map->map_ip(curr_map, pos->start); |
771 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
772 | } else if (curr_map != map) { | |
2e538c4a | 773 | char dso_name[PATH_MAX]; |
aeafcbaf | 774 | struct dso *ndso; |
2e538c4a | 775 | |
d9b62aba AH |
776 | if (delta) { |
777 | /* Kernel was relocated at boot time */ | |
778 | pos->start -= delta; | |
779 | pos->end -= delta; | |
780 | } | |
781 | ||
8a953312 ACM |
782 | if (count == 0) { |
783 | curr_map = map; | |
784 | goto filter_symbol; | |
785 | } | |
786 | ||
aeafcbaf | 787 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
788 | snprintf(dso_name, sizeof(dso_name), |
789 | "[guest.kernel].%d", | |
790 | kernel_range++); | |
791 | else | |
792 | snprintf(dso_name, sizeof(dso_name), | |
793 | "[kernel].%d", | |
794 | kernel_range++); | |
2e538c4a | 795 | |
aeafcbaf ACM |
796 | ndso = dso__new(dso_name); |
797 | if (ndso == NULL) | |
2e538c4a ACM |
798 | return -1; |
799 | ||
aeafcbaf | 800 | ndso->kernel = dso->kernel; |
a1645ce1 | 801 | |
aeafcbaf | 802 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 803 | if (curr_map == NULL) { |
d3a7c489 | 804 | dso__put(ndso); |
2e538c4a ACM |
805 | return -1; |
806 | } | |
a2928c42 | 807 | |
4e06255f | 808 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 809 | map_groups__insert(kmaps, curr_map); |
2e538c4a | 810 | ++kernel_range; |
d9b62aba AH |
811 | } else if (delta) { |
812 | /* Kernel was relocated at boot time */ | |
813 | pos->start -= delta; | |
814 | pos->end -= delta; | |
2e538c4a | 815 | } |
8a953312 | 816 | filter_symbol: |
4e06255f | 817 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 818 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 819 | symbol__delete(pos); |
2e538c4a | 820 | } else { |
4e06255f ACM |
821 | if (curr_map != map) { |
822 | rb_erase(&pos->rb_node, root); | |
823 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
824 | ++moved; |
825 | } else | |
826 | ++count; | |
9974f496 | 827 | } |
a2928c42 ACM |
828 | } |
829 | ||
a1645ce1 | 830 | if (curr_map != map && |
aeafcbaf | 831 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 832 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
833 | dso__set_loaded(curr_map->dso, curr_map->type); |
834 | } | |
835 | ||
8a953312 | 836 | return count + moved; |
2e538c4a | 837 | } |
a2928c42 | 838 | |
3f067dca ACM |
839 | bool symbol__restricted_filename(const char *filename, |
840 | const char *restricted_filename) | |
ec80fde7 ACM |
841 | { |
842 | bool restricted = false; | |
843 | ||
844 | if (symbol_conf.kptr_restrict) { | |
845 | char *r = realpath(filename, NULL); | |
846 | ||
847 | if (r != NULL) { | |
848 | restricted = strcmp(r, restricted_filename) == 0; | |
849 | free(r); | |
850 | return restricted; | |
851 | } | |
852 | } | |
853 | ||
854 | return restricted; | |
855 | } | |
856 | ||
52afdaf9 AH |
857 | struct module_info { |
858 | struct rb_node rb_node; | |
859 | char *name; | |
860 | u64 start; | |
8e0cf965 AH |
861 | }; |
862 | ||
52afdaf9 | 863 | static void add_module(struct module_info *mi, struct rb_root *modules) |
8e0cf965 | 864 | { |
52afdaf9 AH |
865 | struct rb_node **p = &modules->rb_node; |
866 | struct rb_node *parent = NULL; | |
867 | struct module_info *m; | |
8e0cf965 | 868 | |
52afdaf9 AH |
869 | while (*p != NULL) { |
870 | parent = *p; | |
871 | m = rb_entry(parent, struct module_info, rb_node); | |
872 | if (strcmp(mi->name, m->name) < 0) | |
873 | p = &(*p)->rb_left; | |
874 | else | |
875 | p = &(*p)->rb_right; | |
876 | } | |
877 | rb_link_node(&mi->rb_node, parent, p); | |
878 | rb_insert_color(&mi->rb_node, modules); | |
879 | } | |
880 | ||
881 | static void delete_modules(struct rb_root *modules) | |
882 | { | |
883 | struct module_info *mi; | |
884 | struct rb_node *next = rb_first(modules); | |
885 | ||
886 | while (next) { | |
887 | mi = rb_entry(next, struct module_info, rb_node); | |
888 | next = rb_next(&mi->rb_node); | |
889 | rb_erase(&mi->rb_node, modules); | |
74cf249d | 890 | zfree(&mi->name); |
52afdaf9 AH |
891 | free(mi); |
892 | } | |
893 | } | |
894 | ||
895 | static struct module_info *find_module(const char *name, | |
896 | struct rb_root *modules) | |
897 | { | |
898 | struct rb_node *n = modules->rb_node; | |
899 | ||
900 | while (n) { | |
901 | struct module_info *m; | |
902 | int cmp; | |
903 | ||
904 | m = rb_entry(n, struct module_info, rb_node); | |
905 | cmp = strcmp(name, m->name); | |
906 | if (cmp < 0) | |
907 | n = n->rb_left; | |
908 | else if (cmp > 0) | |
909 | n = n->rb_right; | |
910 | else | |
911 | return m; | |
912 | } | |
913 | ||
914 | return NULL; | |
915 | } | |
916 | ||
917 | static int __read_proc_modules(void *arg, const char *name, u64 start) | |
918 | { | |
919 | struct rb_root *modules = arg; | |
920 | struct module_info *mi; | |
921 | ||
922 | mi = zalloc(sizeof(struct module_info)); | |
923 | if (!mi) | |
8e0cf965 AH |
924 | return -ENOMEM; |
925 | ||
52afdaf9 AH |
926 | mi->name = strdup(name); |
927 | mi->start = start; | |
8e0cf965 | 928 | |
52afdaf9 AH |
929 | if (!mi->name) { |
930 | free(mi); | |
931 | return -ENOMEM; | |
932 | } | |
933 | ||
934 | add_module(mi, modules); | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
939 | static int read_proc_modules(const char *filename, struct rb_root *modules) | |
940 | { | |
941 | if (symbol__restricted_filename(filename, "/proc/modules")) | |
942 | return -1; | |
943 | ||
944 | if (modules__parse(filename, modules, __read_proc_modules)) { | |
945 | delete_modules(modules); | |
946 | return -1; | |
947 | } | |
8e0cf965 AH |
948 | |
949 | return 0; | |
950 | } | |
951 | ||
fc1b691d AH |
952 | int compare_proc_modules(const char *from, const char *to) |
953 | { | |
954 | struct rb_root from_modules = RB_ROOT; | |
955 | struct rb_root to_modules = RB_ROOT; | |
956 | struct rb_node *from_node, *to_node; | |
957 | struct module_info *from_m, *to_m; | |
958 | int ret = -1; | |
959 | ||
960 | if (read_proc_modules(from, &from_modules)) | |
961 | return -1; | |
962 | ||
963 | if (read_proc_modules(to, &to_modules)) | |
964 | goto out_delete_from; | |
965 | ||
966 | from_node = rb_first(&from_modules); | |
967 | to_node = rb_first(&to_modules); | |
968 | while (from_node) { | |
969 | if (!to_node) | |
970 | break; | |
971 | ||
972 | from_m = rb_entry(from_node, struct module_info, rb_node); | |
973 | to_m = rb_entry(to_node, struct module_info, rb_node); | |
974 | ||
975 | if (from_m->start != to_m->start || | |
976 | strcmp(from_m->name, to_m->name)) | |
977 | break; | |
978 | ||
979 | from_node = rb_next(from_node); | |
980 | to_node = rb_next(to_node); | |
981 | } | |
982 | ||
983 | if (!from_node && !to_node) | |
984 | ret = 0; | |
985 | ||
986 | delete_modules(&to_modules); | |
987 | out_delete_from: | |
988 | delete_modules(&from_modules); | |
989 | ||
990 | return ret; | |
991 | } | |
992 | ||
52afdaf9 AH |
993 | static int do_validate_kcore_modules(const char *filename, struct map *map, |
994 | struct map_groups *kmaps) | |
995 | { | |
996 | struct rb_root modules = RB_ROOT; | |
997 | struct map *old_map; | |
998 | int err; | |
999 | ||
1000 | err = read_proc_modules(filename, &modules); | |
1001 | if (err) | |
1002 | return err; | |
1003 | ||
1004 | old_map = map_groups__first(kmaps, map->type); | |
1005 | while (old_map) { | |
1006 | struct map *next = map_groups__next(old_map); | |
1007 | struct module_info *mi; | |
1008 | ||
1009 | if (old_map == map || old_map->start == map->start) { | |
1010 | /* The kernel map */ | |
1011 | old_map = next; | |
1012 | continue; | |
1013 | } | |
1014 | ||
1015 | /* Module must be in memory at the same address */ | |
1016 | mi = find_module(old_map->dso->short_name, &modules); | |
1017 | if (!mi || mi->start != old_map->start) { | |
1018 | err = -EINVAL; | |
1019 | goto out; | |
1020 | } | |
1021 | ||
1022 | old_map = next; | |
1023 | } | |
1024 | out: | |
1025 | delete_modules(&modules); | |
1026 | return err; | |
1027 | } | |
1028 | ||
8e0cf965 | 1029 | /* |
52afdaf9 | 1030 | * If kallsyms is referenced by name then we look for filename in the same |
8e0cf965 AH |
1031 | * directory. |
1032 | */ | |
52afdaf9 AH |
1033 | static bool filename_from_kallsyms_filename(char *filename, |
1034 | const char *base_name, | |
1035 | const char *kallsyms_filename) | |
8e0cf965 AH |
1036 | { |
1037 | char *name; | |
1038 | ||
52afdaf9 AH |
1039 | strcpy(filename, kallsyms_filename); |
1040 | name = strrchr(filename, '/'); | |
8e0cf965 AH |
1041 | if (!name) |
1042 | return false; | |
1043 | ||
52afdaf9 AH |
1044 | name += 1; |
1045 | ||
1046 | if (!strcmp(name, "kallsyms")) { | |
1047 | strcpy(name, base_name); | |
8e0cf965 AH |
1048 | return true; |
1049 | } | |
1050 | ||
1051 | return false; | |
1052 | } | |
1053 | ||
52afdaf9 AH |
1054 | static int validate_kcore_modules(const char *kallsyms_filename, |
1055 | struct map *map) | |
1056 | { | |
ba92732e | 1057 | struct map_groups *kmaps = map__kmaps(map); |
52afdaf9 AH |
1058 | char modules_filename[PATH_MAX]; |
1059 | ||
ba92732e WN |
1060 | if (!kmaps) |
1061 | return -EINVAL; | |
1062 | ||
52afdaf9 AH |
1063 | if (!filename_from_kallsyms_filename(modules_filename, "modules", |
1064 | kallsyms_filename)) | |
1065 | return -EINVAL; | |
1066 | ||
1067 | if (do_validate_kcore_modules(modules_filename, map, kmaps)) | |
1068 | return -EINVAL; | |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | ||
a00d28cb AH |
1073 | static int validate_kcore_addresses(const char *kallsyms_filename, |
1074 | struct map *map) | |
1075 | { | |
1076 | struct kmap *kmap = map__kmap(map); | |
1077 | ||
ba92732e WN |
1078 | if (!kmap) |
1079 | return -EINVAL; | |
1080 | ||
a00d28cb AH |
1081 | if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) { |
1082 | u64 start; | |
1083 | ||
1084 | start = kallsyms__get_function_start(kallsyms_filename, | |
1085 | kmap->ref_reloc_sym->name); | |
1086 | if (start != kmap->ref_reloc_sym->addr) | |
1087 | return -EINVAL; | |
1088 | } | |
1089 | ||
1090 | return validate_kcore_modules(kallsyms_filename, map); | |
1091 | } | |
1092 | ||
52afdaf9 AH |
1093 | struct kcore_mapfn_data { |
1094 | struct dso *dso; | |
1095 | enum map_type type; | |
1096 | struct list_head maps; | |
1097 | }; | |
1098 | ||
1099 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
1100 | { | |
1101 | struct kcore_mapfn_data *md = data; | |
1102 | struct map *map; | |
1103 | ||
1104 | map = map__new2(start, md->dso, md->type); | |
1105 | if (map == NULL) | |
1106 | return -ENOMEM; | |
1107 | ||
1108 | map->end = map->start + len; | |
1109 | map->pgoff = pgoff; | |
1110 | ||
1111 | list_add(&map->node, &md->maps); | |
1112 | ||
1113 | return 0; | |
1114 | } | |
1115 | ||
8e0cf965 AH |
1116 | static int dso__load_kcore(struct dso *dso, struct map *map, |
1117 | const char *kallsyms_filename) | |
1118 | { | |
ba92732e WN |
1119 | struct map_groups *kmaps = map__kmaps(map); |
1120 | struct machine *machine; | |
8e0cf965 AH |
1121 | struct kcore_mapfn_data md; |
1122 | struct map *old_map, *new_map, *replacement_map = NULL; | |
1123 | bool is_64_bit; | |
1124 | int err, fd; | |
1125 | char kcore_filename[PATH_MAX]; | |
1126 | struct symbol *sym; | |
1127 | ||
ba92732e WN |
1128 | if (!kmaps) |
1129 | return -EINVAL; | |
1130 | ||
1131 | machine = kmaps->machine; | |
1132 | ||
8e0cf965 AH |
1133 | /* This function requires that the map is the kernel map */ |
1134 | if (map != machine->vmlinux_maps[map->type]) | |
1135 | return -EINVAL; | |
1136 | ||
52afdaf9 AH |
1137 | if (!filename_from_kallsyms_filename(kcore_filename, "kcore", |
1138 | kallsyms_filename)) | |
1139 | return -EINVAL; | |
1140 | ||
a00d28cb AH |
1141 | /* Modules and kernel must be present at their original addresses */ |
1142 | if (validate_kcore_addresses(kallsyms_filename, map)) | |
8e0cf965 AH |
1143 | return -EINVAL; |
1144 | ||
1145 | md.dso = dso; | |
1146 | md.type = map->type; | |
1147 | INIT_LIST_HEAD(&md.maps); | |
1148 | ||
1149 | fd = open(kcore_filename, O_RDONLY); | |
36c8bb56 | 1150 | if (fd < 0) { |
133de940 AH |
1151 | pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n", |
1152 | kcore_filename); | |
8e0cf965 | 1153 | return -EINVAL; |
36c8bb56 | 1154 | } |
8e0cf965 AH |
1155 | |
1156 | /* Read new maps into temporary lists */ | |
1157 | err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md, | |
1158 | &is_64_bit); | |
1159 | if (err) | |
1160 | goto out_err; | |
c6d8f2a4 | 1161 | dso->is_64_bit = is_64_bit; |
8e0cf965 AH |
1162 | |
1163 | if (list_empty(&md.maps)) { | |
1164 | err = -EINVAL; | |
1165 | goto out_err; | |
1166 | } | |
1167 | ||
1168 | /* Remove old maps */ | |
1169 | old_map = map_groups__first(kmaps, map->type); | |
1170 | while (old_map) { | |
1171 | struct map *next = map_groups__next(old_map); | |
1172 | ||
1173 | if (old_map != map) | |
1174 | map_groups__remove(kmaps, old_map); | |
1175 | old_map = next; | |
1176 | } | |
1177 | ||
1178 | /* Find the kernel map using the first symbol */ | |
1179 | sym = dso__first_symbol(dso, map->type); | |
1180 | list_for_each_entry(new_map, &md.maps, node) { | |
1181 | if (sym && sym->start >= new_map->start && | |
1182 | sym->start < new_map->end) { | |
1183 | replacement_map = new_map; | |
1184 | break; | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | if (!replacement_map) | |
1189 | replacement_map = list_entry(md.maps.next, struct map, node); | |
1190 | ||
1191 | /* Add new maps */ | |
1192 | while (!list_empty(&md.maps)) { | |
1193 | new_map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1194 | list_del_init(&new_map->node); |
8e0cf965 AH |
1195 | if (new_map == replacement_map) { |
1196 | map->start = new_map->start; | |
1197 | map->end = new_map->end; | |
1198 | map->pgoff = new_map->pgoff; | |
1199 | map->map_ip = new_map->map_ip; | |
1200 | map->unmap_ip = new_map->unmap_ip; | |
8e0cf965 | 1201 | /* Ensure maps are correctly ordered */ |
84c2cafa | 1202 | map__get(map); |
8e0cf965 AH |
1203 | map_groups__remove(kmaps, map); |
1204 | map_groups__insert(kmaps, map); | |
84c2cafa | 1205 | map__put(map); |
8e0cf965 AH |
1206 | } else { |
1207 | map_groups__insert(kmaps, new_map); | |
1208 | } | |
84c2cafa ACM |
1209 | |
1210 | map__put(new_map); | |
8e0cf965 AH |
1211 | } |
1212 | ||
1213 | /* | |
1214 | * Set the data type and long name so that kcore can be read via | |
1215 | * dso__data_read_addr(). | |
1216 | */ | |
1217 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
5f70619d | 1218 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE; |
8e0cf965 | 1219 | else |
5f70619d | 1220 | dso->binary_type = DSO_BINARY_TYPE__KCORE; |
7e155d4d | 1221 | dso__set_long_name(dso, strdup(kcore_filename), true); |
8e0cf965 AH |
1222 | |
1223 | close(fd); | |
1224 | ||
1225 | if (map->type == MAP__FUNCTION) | |
1226 | pr_debug("Using %s for kernel object code\n", kcore_filename); | |
1227 | else | |
1228 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
1229 | ||
1230 | return 0; | |
1231 | ||
1232 | out_err: | |
1233 | while (!list_empty(&md.maps)) { | |
1234 | map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1235 | list_del_init(&map->node); |
84c2cafa | 1236 | map__put(map); |
8e0cf965 AH |
1237 | } |
1238 | close(fd); | |
1239 | return -EINVAL; | |
1240 | } | |
1241 | ||
d9b62aba AH |
1242 | /* |
1243 | * If the kernel is relocated at boot time, kallsyms won't match. Compute the | |
1244 | * delta based on the relocation reference symbol. | |
1245 | */ | |
1246 | static int kallsyms__delta(struct map *map, const char *filename, u64 *delta) | |
1247 | { | |
1248 | struct kmap *kmap = map__kmap(map); | |
1249 | u64 addr; | |
1250 | ||
ba92732e WN |
1251 | if (!kmap) |
1252 | return -1; | |
1253 | ||
d9b62aba AH |
1254 | if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name) |
1255 | return 0; | |
1256 | ||
1257 | addr = kallsyms__get_function_start(filename, | |
1258 | kmap->ref_reloc_sym->name); | |
1259 | if (!addr) | |
1260 | return -1; | |
1261 | ||
1262 | *delta = addr - kmap->ref_reloc_sym->addr; | |
1263 | return 0; | |
1264 | } | |
1265 | ||
aeafcbaf | 1266 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 1267 | struct map *map, symbol_filter_t filter) |
2e538c4a | 1268 | { |
d9b62aba AH |
1269 | u64 delta = 0; |
1270 | ||
ec80fde7 ACM |
1271 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1272 | return -1; | |
1273 | ||
aeafcbaf | 1274 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
1275 | return -1; |
1276 | ||
d9b62aba AH |
1277 | if (kallsyms__delta(map, filename, &delta)) |
1278 | return -1; | |
1279 | ||
694bf407 | 1280 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
1281 | symbols__fixup_end(&dso->symbols[map->type]); |
1282 | ||
aeafcbaf | 1283 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 1284 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 1285 | else |
44f24cb3 | 1286 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 1287 | |
8e0cf965 AH |
1288 | if (!dso__load_kcore(dso, map, filename)) |
1289 | return dso__split_kallsyms_for_kcore(dso, map, filter); | |
1290 | else | |
d9b62aba | 1291 | return dso__split_kallsyms(dso, map, delta, filter); |
af427bf5 ACM |
1292 | } |
1293 | ||
aeafcbaf | 1294 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 1295 | symbol_filter_t filter) |
80d496be PE |
1296 | { |
1297 | char *line = NULL; | |
1298 | size_t n; | |
1299 | FILE *file; | |
1300 | int nr_syms = 0; | |
1301 | ||
aeafcbaf | 1302 | file = fopen(dso->long_name, "r"); |
80d496be PE |
1303 | if (file == NULL) |
1304 | goto out_failure; | |
1305 | ||
1306 | while (!feof(file)) { | |
9cffa8d5 | 1307 | u64 start, size; |
80d496be PE |
1308 | struct symbol *sym; |
1309 | int line_len, len; | |
1310 | ||
1311 | line_len = getline(&line, &n, file); | |
1312 | if (line_len < 0) | |
1313 | break; | |
1314 | ||
1315 | if (!line) | |
1316 | goto out_failure; | |
1317 | ||
1318 | line[--line_len] = '\0'; /* \n */ | |
1319 | ||
1320 | len = hex2u64(line, &start); | |
1321 | ||
1322 | len++; | |
1323 | if (len + 2 >= line_len) | |
1324 | continue; | |
1325 | ||
1326 | len += hex2u64(line + len, &size); | |
1327 | ||
1328 | len++; | |
1329 | if (len + 2 >= line_len) | |
1330 | continue; | |
1331 | ||
c408fedf | 1332 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
1333 | |
1334 | if (sym == NULL) | |
1335 | goto out_delete_line; | |
1336 | ||
439d473b | 1337 | if (filter && filter(map, sym)) |
00a192b3 | 1338 | symbol__delete(sym); |
80d496be | 1339 | else { |
aeafcbaf | 1340 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
1341 | nr_syms++; |
1342 | } | |
1343 | } | |
1344 | ||
1345 | free(line); | |
1346 | fclose(file); | |
1347 | ||
1348 | return nr_syms; | |
1349 | ||
1350 | out_delete_line: | |
1351 | free(line); | |
1352 | out_failure: | |
1353 | return -1; | |
1354 | } | |
1355 | ||
1029f9fe NK |
1356 | static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod, |
1357 | enum dso_binary_type type) | |
1358 | { | |
1359 | switch (type) { | |
1360 | case DSO_BINARY_TYPE__JAVA_JIT: | |
1361 | case DSO_BINARY_TYPE__DEBUGLINK: | |
1362 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
1363 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
1364 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
1365 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: | |
1366 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: | |
1367 | return !kmod && dso->kernel == DSO_TYPE_USER; | |
1368 | ||
1369 | case DSO_BINARY_TYPE__KALLSYMS: | |
1370 | case DSO_BINARY_TYPE__VMLINUX: | |
1371 | case DSO_BINARY_TYPE__KCORE: | |
1372 | return dso->kernel == DSO_TYPE_KERNEL; | |
1373 | ||
1374 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
1375 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
1376 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
1377 | return dso->kernel == DSO_TYPE_GUEST_KERNEL; | |
1378 | ||
1379 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 1380 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
1029f9fe | 1381 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: |
c00c48fc | 1382 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
1029f9fe NK |
1383 | /* |
1384 | * kernel modules know their symtab type - it's set when | |
9f2de315 | 1385 | * creating a module dso in machine__findnew_module_map(). |
1029f9fe NK |
1386 | */ |
1387 | return kmod && dso->symtab_type == type; | |
1388 | ||
1389 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
1390 | return true; | |
1391 | ||
1392 | case DSO_BINARY_TYPE__NOT_FOUND: | |
1393 | default: | |
1394 | return false; | |
1395 | } | |
1396 | } | |
1397 | ||
aeafcbaf | 1398 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1399 | { |
c338aee8 | 1400 | char *name; |
a2928c42 | 1401 | int ret = -1; |
44f24cb3 | 1402 | u_int i; |
23346f21 | 1403 | struct machine *machine; |
44f24cb3 | 1404 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1405 | int ss_pos = 0; |
1406 | struct symsrc ss_[2]; | |
1407 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
1029f9fe | 1408 | bool kmod; |
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 PE |
1439 | |
1440 | if (st.st_uid && (st.st_uid != geteuid())) { | |
1441 | pr_warning("File %s not owned by current user or root, " | |
1442 | "ignoring it.\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 NK |
1463 | |
1464 | /* | |
1465 | * Iterate over candidate debug images. | |
3aafe5ae CS |
1466 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1467 | * and/or opd section) for processing. | |
6da80ce8 | 1468 | */ |
44f24cb3 | 1469 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1470 | struct symsrc *ss = &ss_[ss_pos]; |
1471 | bool next_slot = false; | |
6da80ce8 | 1472 | |
005f9294 | 1473 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1474 | |
1029f9fe NK |
1475 | if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type)) |
1476 | continue; | |
1477 | ||
ee4e9625 ACM |
1478 | if (dso__read_binary_type_filename(dso, symtab_type, |
1479 | root_dir, name, PATH_MAX)) | |
44f24cb3 | 1480 | continue; |
6da80ce8 DM |
1481 | |
1482 | /* Name is now the name of the next image to try */ | |
3aafe5ae | 1483 | if (symsrc__init(ss, dso, name, symtab_type) < 0) |
6da80ce8 | 1484 | continue; |
a2928c42 | 1485 | |
3aafe5ae CS |
1486 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1487 | syms_ss = ss; | |
1488 | next_slot = true; | |
0058aef6 AH |
1489 | if (!dso->symsrc_filename) |
1490 | dso->symsrc_filename = strdup(name); | |
d26cd12b CS |
1491 | } |
1492 | ||
3aafe5ae CS |
1493 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1494 | runtime_ss = ss; | |
1495 | next_slot = true; | |
a44f605b | 1496 | } |
a2928c42 | 1497 | |
3aafe5ae CS |
1498 | if (next_slot) { |
1499 | ss_pos++; | |
33ff581e | 1500 | |
3aafe5ae CS |
1501 | if (syms_ss && runtime_ss) |
1502 | break; | |
98e9f03b NK |
1503 | } else { |
1504 | symsrc__destroy(ss); | |
6da80ce8 | 1505 | } |
3aafe5ae | 1506 | |
a25e46c4 | 1507 | } |
6da80ce8 | 1508 | |
3aafe5ae CS |
1509 | if (!runtime_ss && !syms_ss) |
1510 | goto out_free; | |
1511 | ||
1512 | if (runtime_ss && !syms_ss) { | |
1513 | syms_ss = runtime_ss; | |
1514 | } | |
1515 | ||
1516 | /* We'll have to hope for the best */ | |
1517 | if (!runtime_ss && syms_ss) | |
1518 | runtime_ss = syms_ss; | |
1519 | ||
1029f9fe NK |
1520 | if (syms_ss) |
1521 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, kmod); | |
1522 | else | |
3aafe5ae CS |
1523 | ret = -1; |
1524 | ||
f47b58b7 | 1525 | if (ret > 0) { |
3aafe5ae CS |
1526 | int nr_plt; |
1527 | ||
1528 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map, filter); | |
1529 | if (nr_plt > 0) | |
1530 | ret += nr_plt; | |
60e4b10c ACM |
1531 | } |
1532 | ||
3aafe5ae CS |
1533 | for (; ss_pos > 0; ss_pos--) |
1534 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1535 | out_free: | |
a2928c42 | 1536 | free(name); |
aeafcbaf | 1537 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
4a936edc NK |
1538 | ret = 0; |
1539 | out: | |
1540 | dso__set_loaded(dso, map->type); | |
1541 | pthread_mutex_unlock(&dso->lock); | |
1542 | ||
a2928c42 ACM |
1543 | return ret; |
1544 | } | |
1545 | ||
aeafcbaf | 1546 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1547 | enum map_type type, const char *name) |
439d473b | 1548 | { |
1eee78ae | 1549 | struct maps *maps = &mg->maps[type]; |
4bb7123d | 1550 | struct map *map; |
439d473b | 1551 | |
6a2ffcdd ACM |
1552 | pthread_rwlock_rdlock(&maps->lock); |
1553 | ||
4bb7123d | 1554 | for (map = maps__first(maps); map; map = map__next(map)) { |
b7cece76 | 1555 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
6a2ffcdd | 1556 | goto out_unlock; |
439d473b ACM |
1557 | } |
1558 | ||
6a2ffcdd ACM |
1559 | map = NULL; |
1560 | ||
1561 | out_unlock: | |
1562 | pthread_rwlock_unlock(&maps->lock); | |
1563 | return map; | |
439d473b ACM |
1564 | } |
1565 | ||
aeafcbaf | 1566 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
5230fb7d ACM |
1567 | const char *vmlinux, bool vmlinux_allocated, |
1568 | symbol_filter_t filter) | |
a2928c42 | 1569 | { |
b68e2f91 CS |
1570 | int err = -1; |
1571 | struct symsrc ss; | |
ec5761ea | 1572 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1573 | enum dso_binary_type symtab_type; |
a2928c42 | 1574 | |
5698d2c9 NK |
1575 | if (vmlinux[0] == '/') |
1576 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1577 | else | |
972f393b | 1578 | symbol__join_symfs(symfs_vmlinux, vmlinux); |
a2928c42 | 1579 | |
21ea4539 | 1580 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1581 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1582 | else |
005f9294 | 1583 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1584 | |
005f9294 | 1585 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1586 | return -1; |
1587 | ||
261360b6 | 1588 | err = dso__load_sym(dso, map, &ss, &ss, filter, 0); |
b68e2f91 | 1589 | symsrc__destroy(&ss); |
a2928c42 | 1590 | |
515850e4 | 1591 | if (err > 0) { |
39b12f78 | 1592 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
5f70619d | 1593 | dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
39b12f78 | 1594 | else |
5f70619d | 1595 | dso->binary_type = DSO_BINARY_TYPE__VMLINUX; |
bf4414ae | 1596 | dso__set_long_name(dso, vmlinux, vmlinux_allocated); |
515850e4 | 1597 | dso__set_loaded(dso, map->type); |
ec5761ea | 1598 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1599 | } |
3846df2e | 1600 | |
a2928c42 ACM |
1601 | return err; |
1602 | } | |
1603 | ||
aeafcbaf | 1604 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 1605 | symbol_filter_t filter) |
a19afe46 ACM |
1606 | { |
1607 | int i, err = 0; | |
00dc8657 | 1608 | char *filename = NULL; |
a19afe46 | 1609 | |
00dc8657 NK |
1610 | if (!symbol_conf.ignore_vmlinux_buildid) |
1611 | filename = dso__build_id_filename(dso, NULL, 0); | |
5ad90e4e | 1612 | if (filename != NULL) { |
5230fb7d ACM |
1613 | err = dso__load_vmlinux(dso, map, filename, true, filter); |
1614 | if (err > 0) | |
5ad90e4e | 1615 | goto out; |
5ad90e4e ACM |
1616 | free(filename); |
1617 | } | |
a19afe46 | 1618 | |
00dc8657 NK |
1619 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", |
1620 | vmlinux_path__nr_entries + 1); | |
1621 | ||
a19afe46 | 1622 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { |
5230fb7d ACM |
1623 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], false, filter); |
1624 | if (err > 0) | |
a19afe46 | 1625 | break; |
a19afe46 | 1626 | } |
5ad90e4e | 1627 | out: |
a19afe46 ACM |
1628 | return err; |
1629 | } | |
1630 | ||
0544d422 AH |
1631 | static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz) |
1632 | { | |
1633 | char kallsyms_filename[PATH_MAX]; | |
1634 | struct dirent *dent; | |
1635 | int ret = -1; | |
1636 | DIR *d; | |
1637 | ||
1638 | d = opendir(dir); | |
1639 | if (!d) | |
1640 | return -1; | |
1641 | ||
1642 | while (1) { | |
1643 | dent = readdir(d); | |
1644 | if (!dent) | |
1645 | break; | |
1646 | if (dent->d_type != DT_DIR) | |
1647 | continue; | |
1648 | scnprintf(kallsyms_filename, sizeof(kallsyms_filename), | |
1649 | "%s/%s/kallsyms", dir, dent->d_name); | |
a00d28cb | 1650 | if (!validate_kcore_addresses(kallsyms_filename, map)) { |
0544d422 AH |
1651 | strlcpy(dir, kallsyms_filename, dir_sz); |
1652 | ret = 0; | |
1653 | break; | |
1654 | } | |
1655 | } | |
1656 | ||
1657 | closedir(d); | |
1658 | ||
1659 | return ret; | |
1660 | } | |
1661 | ||
1662 | static char *dso__find_kallsyms(struct dso *dso, struct map *map) | |
1663 | { | |
1664 | u8 host_build_id[BUILD_ID_SIZE]; | |
1665 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
1666 | bool is_host = false; | |
1667 | char path[PATH_MAX]; | |
1668 | ||
1669 | if (!dso->has_build_id) { | |
1670 | /* | |
1671 | * Last resort, if we don't have a build-id and couldn't find | |
1672 | * any vmlinux file, try the running kernel kallsyms table. | |
1673 | */ | |
1674 | goto proc_kallsyms; | |
1675 | } | |
1676 | ||
1677 | if (sysfs__read_build_id("/sys/kernel/notes", host_build_id, | |
1678 | sizeof(host_build_id)) == 0) | |
1679 | is_host = dso__build_id_equal(dso, host_build_id); | |
1680 | ||
1681 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
1682 | ||
449867e3 AH |
1683 | scnprintf(path, sizeof(path), "%s/[kernel.kcore]/%s", buildid_dir, |
1684 | sbuild_id); | |
1685 | ||
0544d422 AH |
1686 | /* Use /proc/kallsyms if possible */ |
1687 | if (is_host) { | |
1688 | DIR *d; | |
1689 | int fd; | |
1690 | ||
1691 | /* If no cached kcore go with /proc/kallsyms */ | |
0544d422 AH |
1692 | d = opendir(path); |
1693 | if (!d) | |
1694 | goto proc_kallsyms; | |
1695 | closedir(d); | |
1696 | ||
1697 | /* | |
1698 | * Do not check the build-id cache, until we know we cannot use | |
1699 | * /proc/kcore. | |
1700 | */ | |
1701 | fd = open("/proc/kcore", O_RDONLY); | |
1702 | if (fd != -1) { | |
1703 | close(fd); | |
1704 | /* If module maps match go with /proc/kallsyms */ | |
a00d28cb | 1705 | if (!validate_kcore_addresses("/proc/kallsyms", map)) |
0544d422 AH |
1706 | goto proc_kallsyms; |
1707 | } | |
1708 | ||
1709 | /* Find kallsyms in build-id cache with kcore */ | |
1710 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1711 | return strdup(path); | |
1712 | ||
1713 | goto proc_kallsyms; | |
1714 | } | |
1715 | ||
449867e3 AH |
1716 | /* Find kallsyms in build-id cache with kcore */ |
1717 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1718 | return strdup(path); | |
1719 | ||
0544d422 AH |
1720 | scnprintf(path, sizeof(path), "%s/[kernel.kallsyms]/%s", |
1721 | buildid_dir, sbuild_id); | |
1722 | ||
1723 | if (access(path, F_OK)) { | |
1724 | pr_err("No kallsyms or vmlinux with build-id %s was found\n", | |
1725 | sbuild_id); | |
1726 | return NULL; | |
1727 | } | |
1728 | ||
1729 | return strdup(path); | |
1730 | ||
1731 | proc_kallsyms: | |
1732 | return strdup("/proc/kallsyms"); | |
1733 | } | |
1734 | ||
aeafcbaf | 1735 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 1736 | symbol_filter_t filter) |
a827c875 | 1737 | { |
cc612d81 | 1738 | int err; |
9e201442 ACM |
1739 | const char *kallsyms_filename = NULL; |
1740 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1741 | /* |
b226a5a7 DA |
1742 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1743 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1744 | * |
1745 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1746 | * build-id, or if the user specifies the wrong path to the right | |
1747 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1748 | * x86_86 one, on the machine where analysis is being performed, say), | |
1749 | * or worse, /proc/kallsyms. | |
1750 | * | |
1751 | * If the specified file _has_ a build-id and there is a build-id | |
1752 | * section in the perf.data file, we will still do the expected | |
1753 | * validation in dso__load_vmlinux and will bail out if they don't | |
1754 | * match. | |
1755 | */ | |
b226a5a7 DA |
1756 | if (symbol_conf.kallsyms_name != NULL) { |
1757 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1758 | goto do_kallsyms; | |
1759 | } | |
1760 | ||
fc2be696 | 1761 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
5230fb7d ACM |
1762 | return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, |
1763 | false, filter); | |
dc8d6ab2 | 1764 | } |
cc612d81 | 1765 | |
fc2be696 | 1766 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
aeafcbaf | 1767 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 | 1768 | if (err > 0) |
39b12f78 | 1769 | return err; |
cc612d81 ACM |
1770 | } |
1771 | ||
ec5761ea DA |
1772 | /* do not try local files if a symfs was given */ |
1773 | if (symbol_conf.symfs[0] != 0) | |
1774 | return -1; | |
1775 | ||
0544d422 AH |
1776 | kallsyms_allocated_filename = dso__find_kallsyms(dso, map); |
1777 | if (!kallsyms_allocated_filename) | |
1778 | return -1; | |
19fc2ded | 1779 | |
0544d422 | 1780 | kallsyms_filename = kallsyms_allocated_filename; |
439d473b | 1781 | |
cc612d81 | 1782 | do_kallsyms: |
aeafcbaf | 1783 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
1784 | if (err > 0) |
1785 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1786 | free(kallsyms_allocated_filename); |
439d473b | 1787 | |
8e0cf965 | 1788 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1789 | dso->binary_type = DSO_BINARY_TYPE__KALLSYMS; |
bf4414ae | 1790 | dso__set_long_name(dso, "[kernel.kallsyms]", false); |
6a4694a4 ACM |
1791 | map__fixup_start(map); |
1792 | map__fixup_end(map); | |
439d473b | 1793 | } |
94cb9e38 | 1794 | |
a827c875 ACM |
1795 | return err; |
1796 | } | |
1797 | ||
aeafcbaf ACM |
1798 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
1799 | symbol_filter_t filter) | |
a1645ce1 ZY |
1800 | { |
1801 | int err; | |
1802 | const char *kallsyms_filename = NULL; | |
23346f21 | 1803 | struct machine *machine; |
a1645ce1 ZY |
1804 | char path[PATH_MAX]; |
1805 | ||
1806 | if (!map->groups) { | |
1807 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1808 | return -1; | |
1809 | } | |
23346f21 | 1810 | machine = map->groups->machine; |
a1645ce1 | 1811 | |
23346f21 | 1812 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1813 | /* |
1814 | * if the user specified a vmlinux filename, use it and only | |
1815 | * it, reporting errors to the user if it cannot be used. | |
1816 | * Or use file guest_kallsyms inputted by user on commandline | |
1817 | */ | |
1818 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1819 | err = dso__load_vmlinux(dso, map, |
5230fb7d ACM |
1820 | symbol_conf.default_guest_vmlinux_name, |
1821 | false, filter); | |
39b12f78 | 1822 | return err; |
a1645ce1 ZY |
1823 | } |
1824 | ||
1825 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1826 | if (!kallsyms_filename) | |
1827 | return -1; | |
1828 | } else { | |
23346f21 | 1829 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1830 | kallsyms_filename = path; |
1831 | } | |
1832 | ||
aeafcbaf | 1833 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
8e0cf965 | 1834 | if (err > 0) |
39b12f78 | 1835 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 1836 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1837 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
39b12f78 | 1838 | machine__mmap_name(machine, path, sizeof(path)); |
7e155d4d | 1839 | dso__set_long_name(dso, strdup(path), true); |
a1645ce1 ZY |
1840 | map__fixup_start(map); |
1841 | map__fixup_end(map); | |
1842 | } | |
1843 | ||
1844 | return err; | |
1845 | } | |
cd84c2ac | 1846 | |
cc612d81 ACM |
1847 | static void vmlinux_path__exit(void) |
1848 | { | |
04662523 ACM |
1849 | while (--vmlinux_path__nr_entries >= 0) |
1850 | zfree(&vmlinux_path[vmlinux_path__nr_entries]); | |
c4f03547 | 1851 | vmlinux_path__nr_entries = 0; |
cc612d81 | 1852 | |
04662523 | 1853 | zfree(&vmlinux_path); |
cc612d81 ACM |
1854 | } |
1855 | ||
ce80d3be | 1856 | static int vmlinux_path__init(struct perf_env *env) |
cc612d81 ACM |
1857 | { |
1858 | struct utsname uts; | |
1859 | char bf[PATH_MAX]; | |
0a7e6d1b | 1860 | char *kernel_version; |
cc612d81 | 1861 | |
c657f423 | 1862 | vmlinux_path = malloc(sizeof(char *) * 6); |
cc612d81 ACM |
1863 | if (vmlinux_path == NULL) |
1864 | return -1; | |
1865 | ||
1866 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
1867 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1868 | goto out_fail; | |
1869 | ++vmlinux_path__nr_entries; | |
1870 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
1871 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1872 | goto out_fail; | |
1873 | ++vmlinux_path__nr_entries; | |
ec5761ea | 1874 | |
0a7e6d1b | 1875 | /* only try kernel version if no symfs was given */ |
ec5761ea DA |
1876 | if (symbol_conf.symfs[0] != 0) |
1877 | return 0; | |
1878 | ||
0a7e6d1b NK |
1879 | if (env) { |
1880 | kernel_version = env->os_release; | |
1881 | } else { | |
1882 | if (uname(&uts) < 0) | |
1883 | goto out_fail; | |
1884 | ||
1885 | kernel_version = uts.release; | |
1886 | } | |
ec5761ea | 1887 | |
0a7e6d1b | 1888 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", kernel_version); |
cc612d81 ACM |
1889 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); |
1890 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1891 | goto out_fail; | |
1892 | ++vmlinux_path__nr_entries; | |
c657f423 AB |
1893 | snprintf(bf, sizeof(bf), "/usr/lib/debug/boot/vmlinux-%s", |
1894 | kernel_version); | |
1895 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1896 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1897 | goto out_fail; | |
1898 | ++vmlinux_path__nr_entries; | |
0a7e6d1b | 1899 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", kernel_version); |
cc612d81 ACM |
1900 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); |
1901 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1902 | goto out_fail; | |
1903 | ++vmlinux_path__nr_entries; | |
1904 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
0a7e6d1b | 1905 | kernel_version); |
cc612d81 ACM |
1906 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); |
1907 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1908 | goto out_fail; | |
1909 | ++vmlinux_path__nr_entries; | |
1910 | ||
1911 | return 0; | |
1912 | ||
1913 | out_fail: | |
1914 | vmlinux_path__exit(); | |
1915 | return -1; | |
1916 | } | |
1917 | ||
3bfe5f81 | 1918 | int setup_list(struct strlist **list, const char *list_str, |
655000e7 ACM |
1919 | const char *list_name) |
1920 | { | |
1921 | if (list_str == NULL) | |
1922 | return 0; | |
1923 | ||
4a77e218 | 1924 | *list = strlist__new(list_str, NULL); |
655000e7 ACM |
1925 | if (!*list) { |
1926 | pr_err("problems parsing %s list\n", list_name); | |
1927 | return -1; | |
1928 | } | |
0bc2f2f7 ACM |
1929 | |
1930 | symbol_conf.has_filter = true; | |
655000e7 ACM |
1931 | return 0; |
1932 | } | |
1933 | ||
e03eaa40 DA |
1934 | int setup_intlist(struct intlist **list, const char *list_str, |
1935 | const char *list_name) | |
1936 | { | |
1937 | if (list_str == NULL) | |
1938 | return 0; | |
1939 | ||
1940 | *list = intlist__new(list_str); | |
1941 | if (!*list) { | |
1942 | pr_err("problems parsing %s list\n", list_name); | |
1943 | return -1; | |
1944 | } | |
1945 | return 0; | |
1946 | } | |
1947 | ||
ec80fde7 ACM |
1948 | static bool symbol__read_kptr_restrict(void) |
1949 | { | |
1950 | bool value = false; | |
1951 | ||
1952 | if (geteuid() != 0) { | |
1953 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
1954 | if (fp != NULL) { | |
1955 | char line[8]; | |
1956 | ||
1957 | if (fgets(line, sizeof(line), fp) != NULL) | |
1958 | value = atoi(line) != 0; | |
1959 | ||
1960 | fclose(fp); | |
1961 | } | |
1962 | } | |
1963 | ||
1964 | return value; | |
1965 | } | |
1966 | ||
ce80d3be | 1967 | int symbol__init(struct perf_env *env) |
2446042c | 1968 | { |
ec5761ea DA |
1969 | const char *symfs; |
1970 | ||
85e00b55 JZ |
1971 | if (symbol_conf.initialized) |
1972 | return 0; | |
1973 | ||
9ac3e487 | 1974 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 1975 | |
166ccc9c NK |
1976 | symbol__elf_init(); |
1977 | ||
75be6cf4 ACM |
1978 | if (symbol_conf.sort_by_name) |
1979 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
1980 | sizeof(struct symbol)); | |
b32d133a | 1981 | |
0a7e6d1b | 1982 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0) |
2446042c ACM |
1983 | return -1; |
1984 | ||
c410a338 ACM |
1985 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
1986 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
1987 | return -1; | |
1988 | } | |
1989 | ||
655000e7 ACM |
1990 | if (setup_list(&symbol_conf.dso_list, |
1991 | symbol_conf.dso_list_str, "dso") < 0) | |
1992 | return -1; | |
1993 | ||
1994 | if (setup_list(&symbol_conf.comm_list, | |
1995 | symbol_conf.comm_list_str, "comm") < 0) | |
1996 | goto out_free_dso_list; | |
1997 | ||
e03eaa40 DA |
1998 | if (setup_intlist(&symbol_conf.pid_list, |
1999 | symbol_conf.pid_list_str, "pid") < 0) | |
2000 | goto out_free_comm_list; | |
2001 | ||
2002 | if (setup_intlist(&symbol_conf.tid_list, | |
2003 | symbol_conf.tid_list_str, "tid") < 0) | |
2004 | goto out_free_pid_list; | |
2005 | ||
655000e7 ACM |
2006 | if (setup_list(&symbol_conf.sym_list, |
2007 | symbol_conf.sym_list_str, "symbol") < 0) | |
e03eaa40 | 2008 | goto out_free_tid_list; |
655000e7 | 2009 | |
ec5761ea DA |
2010 | /* |
2011 | * A path to symbols of "/" is identical to "" | |
2012 | * reset here for simplicity. | |
2013 | */ | |
2014 | symfs = realpath(symbol_conf.symfs, NULL); | |
2015 | if (symfs == NULL) | |
2016 | symfs = symbol_conf.symfs; | |
2017 | if (strcmp(symfs, "/") == 0) | |
2018 | symbol_conf.symfs = ""; | |
2019 | if (symfs != symbol_conf.symfs) | |
2020 | free((void *)symfs); | |
2021 | ||
ec80fde7 ACM |
2022 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2023 | ||
85e00b55 | 2024 | symbol_conf.initialized = true; |
4aa65636 | 2025 | return 0; |
655000e7 | 2026 | |
e03eaa40 DA |
2027 | out_free_tid_list: |
2028 | intlist__delete(symbol_conf.tid_list); | |
2029 | out_free_pid_list: | |
2030 | intlist__delete(symbol_conf.pid_list); | |
655000e7 ACM |
2031 | out_free_comm_list: |
2032 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
2033 | out_free_dso_list: |
2034 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 2035 | return -1; |
4aa65636 ACM |
2036 | } |
2037 | ||
d65a458b ACM |
2038 | void symbol__exit(void) |
2039 | { | |
85e00b55 JZ |
2040 | if (!symbol_conf.initialized) |
2041 | return; | |
d65a458b ACM |
2042 | strlist__delete(symbol_conf.sym_list); |
2043 | strlist__delete(symbol_conf.dso_list); | |
2044 | strlist__delete(symbol_conf.comm_list); | |
e03eaa40 DA |
2045 | intlist__delete(symbol_conf.tid_list); |
2046 | intlist__delete(symbol_conf.pid_list); | |
d65a458b ACM |
2047 | vmlinux_path__exit(); |
2048 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 2049 | symbol_conf.initialized = false; |
d65a458b | 2050 | } |