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 | ||
88 | #define SYMBOL_A 0 | |
89 | #define SYMBOL_B 1 | |
90 | ||
91 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
92 | { | |
93 | s64 a; | |
94 | s64 b; | |
3445432b | 95 | size_t na, nb; |
694bf407 AB |
96 | |
97 | /* Prefer a symbol with non zero length */ | |
98 | a = syma->end - syma->start; | |
99 | b = symb->end - symb->start; | |
100 | if ((b == 0) && (a > 0)) | |
101 | return SYMBOL_A; | |
102 | else if ((a == 0) && (b > 0)) | |
103 | return SYMBOL_B; | |
104 | ||
105 | /* Prefer a non weak symbol over a weak one */ | |
106 | a = syma->binding == STB_WEAK; | |
107 | b = symb->binding == STB_WEAK; | |
108 | if (b && !a) | |
109 | return SYMBOL_A; | |
110 | if (a && !b) | |
111 | return SYMBOL_B; | |
112 | ||
113 | /* Prefer a global symbol over a non global one */ | |
114 | a = syma->binding == STB_GLOBAL; | |
115 | b = symb->binding == STB_GLOBAL; | |
116 | if (a && !b) | |
117 | return SYMBOL_A; | |
118 | if (b && !a) | |
119 | return SYMBOL_B; | |
120 | ||
121 | /* Prefer a symbol with less underscores */ | |
122 | a = prefix_underscores_count(syma->name); | |
123 | b = prefix_underscores_count(symb->name); | |
124 | if (b > a) | |
125 | return SYMBOL_A; | |
126 | else if (a > b) | |
127 | return SYMBOL_B; | |
128 | ||
3445432b AH |
129 | /* Choose the symbol with the longest name */ |
130 | na = strlen(syma->name); | |
131 | nb = strlen(symb->name); | |
132 | if (na > nb) | |
694bf407 | 133 | return SYMBOL_A; |
3445432b | 134 | else if (na < nb) |
694bf407 | 135 | return SYMBOL_B; |
3445432b AH |
136 | |
137 | /* Avoid "SyS" kernel syscall aliases */ | |
138 | if (na >= 3 && !strncmp(syma->name, "SyS", 3)) | |
139 | return SYMBOL_B; | |
140 | if (na >= 10 && !strncmp(syma->name, "compat_SyS", 10)) | |
141 | return SYMBOL_B; | |
142 | ||
143 | return SYMBOL_A; | |
694bf407 AB |
144 | } |
145 | ||
e5a1845f | 146 | void symbols__fixup_duplicate(struct rb_root *symbols) |
694bf407 AB |
147 | { |
148 | struct rb_node *nd; | |
149 | struct symbol *curr, *next; | |
150 | ||
151 | nd = rb_first(symbols); | |
152 | ||
153 | while (nd) { | |
154 | curr = rb_entry(nd, struct symbol, rb_node); | |
155 | again: | |
156 | nd = rb_next(&curr->rb_node); | |
157 | next = rb_entry(nd, struct symbol, rb_node); | |
158 | ||
159 | if (!nd) | |
160 | break; | |
161 | ||
162 | if (curr->start != next->start) | |
163 | continue; | |
164 | ||
165 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
166 | rb_erase(&next->rb_node, symbols); | |
d4f74eb8 | 167 | symbol__delete(next); |
694bf407 AB |
168 | goto again; |
169 | } else { | |
170 | nd = rb_next(&curr->rb_node); | |
171 | rb_erase(&curr->rb_node, symbols); | |
d4f74eb8 | 172 | symbol__delete(curr); |
694bf407 AB |
173 | } |
174 | } | |
175 | } | |
176 | ||
e5a1845f | 177 | void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 178 | { |
aeafcbaf | 179 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 180 | struct symbol *curr, *prev; |
af427bf5 ACM |
181 | |
182 | if (prevnd == NULL) | |
183 | return; | |
184 | ||
2e538c4a ACM |
185 | curr = rb_entry(prevnd, struct symbol, rb_node); |
186 | ||
af427bf5 | 187 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
188 | prev = curr; |
189 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 190 | |
3b01a413 | 191 | if (prev->end == prev->start && prev->end != curr->start) |
2c241bd3 | 192 | prev->end = curr->start; |
af427bf5 | 193 | } |
2e538c4a ACM |
194 | |
195 | /* Last entry */ | |
196 | if (curr->end == curr->start) | |
197 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
198 | } |
199 | ||
e5a1845f | 200 | void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 ACM |
201 | { |
202 | struct map *prev, *curr; | |
aeafcbaf | 203 | struct rb_node *nd, *prevnd = rb_first(&mg->maps[type]); |
af427bf5 ACM |
204 | |
205 | if (prevnd == NULL) | |
206 | return; | |
207 | ||
208 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
209 | |
210 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
211 | prev = curr; | |
212 | curr = rb_entry(nd, struct map, rb_node); | |
eba85230 | 213 | prev->end = curr->start; |
2e538c4a | 214 | } |
90c83218 ACM |
215 | |
216 | /* | |
217 | * We still haven't the actual symbols, so guess the | |
218 | * last map final address. | |
219 | */ | |
9d1faba5 | 220 | curr->end = ~0ULL; |
af427bf5 ACM |
221 | } |
222 | ||
e5a1845f | 223 | struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name) |
a2928c42 | 224 | { |
0085c954 | 225 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
226 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
227 | sizeof(*sym) + namelen)); | |
228 | if (sym == NULL) | |
0b73da3f IM |
229 | return NULL; |
230 | ||
75be6cf4 | 231 | if (symbol_conf.priv_size) |
aeafcbaf | 232 | sym = ((void *)sym) + symbol_conf.priv_size; |
e4204992 | 233 | |
aeafcbaf | 234 | sym->start = start; |
2c241bd3 | 235 | sym->end = len ? start + len : start; |
aeafcbaf ACM |
236 | sym->binding = binding; |
237 | sym->namelen = namelen - 1; | |
e4204992 | 238 | |
aeafcbaf ACM |
239 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
240 | __func__, name, start, sym->end); | |
241 | memcpy(sym->name, name, namelen); | |
a2928c42 | 242 | |
aeafcbaf | 243 | return sym; |
a2928c42 ACM |
244 | } |
245 | ||
aeafcbaf | 246 | void symbol__delete(struct symbol *sym) |
a2928c42 | 247 | { |
aeafcbaf | 248 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
249 | } |
250 | ||
cdd059d7 | 251 | size_t symbol__fprintf(struct symbol *sym, FILE *fp) |
a2928c42 | 252 | { |
9486aa38 | 253 | return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n", |
aeafcbaf ACM |
254 | sym->start, sym->end, |
255 | sym->binding == STB_GLOBAL ? 'g' : | |
256 | sym->binding == STB_LOCAL ? 'l' : 'w', | |
257 | sym->name); | |
a2928c42 ACM |
258 | } |
259 | ||
a978f2ab AN |
260 | size_t symbol__fprintf_symname_offs(const struct symbol *sym, |
261 | const struct addr_location *al, FILE *fp) | |
547a92e0 | 262 | { |
a978f2ab AN |
263 | unsigned long offset; |
264 | size_t length; | |
265 | ||
266 | if (sym && sym->name) { | |
267 | length = fprintf(fp, "%s", sym->name); | |
268 | if (al) { | |
0b8c25d9 DA |
269 | if (al->addr < sym->end) |
270 | offset = al->addr - sym->start; | |
271 | else | |
272 | offset = al->addr - al->map->start - sym->start; | |
a978f2ab AN |
273 | length += fprintf(fp, "+0x%lx", offset); |
274 | } | |
275 | return length; | |
276 | } else | |
277 | return fprintf(fp, "[unknown]"); | |
278 | } | |
547a92e0 | 279 | |
a978f2ab AN |
280 | size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp) |
281 | { | |
282 | return symbol__fprintf_symname_offs(sym, NULL, fp); | |
547a92e0 AN |
283 | } |
284 | ||
cdd059d7 | 285 | void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
286 | { |
287 | struct symbol *pos; | |
aeafcbaf | 288 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
289 | |
290 | while (next) { | |
291 | pos = rb_entry(next, struct symbol, rb_node); | |
292 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 293 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 294 | symbol__delete(pos); |
a2928c42 ACM |
295 | } |
296 | } | |
297 | ||
e5a1845f | 298 | void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
a2928c42 | 299 | { |
aeafcbaf | 300 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 301 | struct rb_node *parent = NULL; |
9cffa8d5 | 302 | const u64 ip = sym->start; |
a2928c42 ACM |
303 | struct symbol *s; |
304 | ||
305 | while (*p != NULL) { | |
306 | parent = *p; | |
307 | s = rb_entry(parent, struct symbol, rb_node); | |
308 | if (ip < s->start) | |
309 | p = &(*p)->rb_left; | |
310 | else | |
311 | p = &(*p)->rb_right; | |
312 | } | |
313 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 314 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
315 | } |
316 | ||
aeafcbaf | 317 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
318 | { |
319 | struct rb_node *n; | |
320 | ||
aeafcbaf | 321 | if (symbols == NULL) |
a2928c42 ACM |
322 | return NULL; |
323 | ||
aeafcbaf | 324 | n = symbols->rb_node; |
a2928c42 ACM |
325 | |
326 | while (n) { | |
327 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
328 | ||
329 | if (ip < s->start) | |
330 | n = n->rb_left; | |
2c241bd3 | 331 | else if (ip >= s->end) |
a2928c42 ACM |
332 | n = n->rb_right; |
333 | else | |
334 | return s; | |
335 | } | |
336 | ||
337 | return NULL; | |
338 | } | |
339 | ||
8e0cf965 AH |
340 | static struct symbol *symbols__first(struct rb_root *symbols) |
341 | { | |
342 | struct rb_node *n = rb_first(symbols); | |
343 | ||
344 | if (n) | |
345 | return rb_entry(n, struct symbol, rb_node); | |
346 | ||
347 | return NULL; | |
348 | } | |
349 | ||
9c00a81b AH |
350 | static struct symbol *symbols__next(struct symbol *sym) |
351 | { | |
352 | struct rb_node *n = rb_next(&sym->rb_node); | |
353 | ||
354 | if (n) | |
355 | return rb_entry(n, struct symbol, rb_node); | |
356 | ||
357 | return NULL; | |
358 | } | |
359 | ||
79406cd7 ACM |
360 | struct symbol_name_rb_node { |
361 | struct rb_node rb_node; | |
362 | struct symbol sym; | |
363 | }; | |
364 | ||
aeafcbaf | 365 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 366 | { |
aeafcbaf | 367 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 368 | struct rb_node *parent = NULL; |
02a9d037 RV |
369 | struct symbol_name_rb_node *symn, *s; |
370 | ||
371 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
372 | |
373 | while (*p != NULL) { | |
374 | parent = *p; | |
375 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
376 | if (strcmp(sym->name, s->sym.name) < 0) | |
377 | p = &(*p)->rb_left; | |
378 | else | |
379 | p = &(*p)->rb_right; | |
380 | } | |
381 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 382 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
383 | } |
384 | ||
aeafcbaf ACM |
385 | static void symbols__sort_by_name(struct rb_root *symbols, |
386 | struct rb_root *source) | |
79406cd7 ACM |
387 | { |
388 | struct rb_node *nd; | |
389 | ||
390 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
391 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 392 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
393 | } |
394 | } | |
395 | ||
aeafcbaf ACM |
396 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
397 | const char *name) | |
79406cd7 ACM |
398 | { |
399 | struct rb_node *n; | |
de480999 | 400 | struct symbol_name_rb_node *s; |
79406cd7 | 401 | |
aeafcbaf | 402 | if (symbols == NULL) |
79406cd7 ACM |
403 | return NULL; |
404 | ||
aeafcbaf | 405 | n = symbols->rb_node; |
79406cd7 ACM |
406 | |
407 | while (n) { | |
79406cd7 ACM |
408 | int cmp; |
409 | ||
410 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
411 | cmp = strcmp(name, s->sym.name); | |
412 | ||
413 | if (cmp < 0) | |
414 | n = n->rb_left; | |
415 | else if (cmp > 0) | |
416 | n = n->rb_right; | |
417 | else | |
de480999 | 418 | break; |
79406cd7 ACM |
419 | } |
420 | ||
de480999 NK |
421 | if (n == NULL) |
422 | return NULL; | |
423 | ||
424 | /* return first symbol that has same name (if any) */ | |
425 | for (n = rb_prev(n); n; n = rb_prev(n)) { | |
426 | struct symbol_name_rb_node *tmp; | |
427 | ||
428 | tmp = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
429 | if (strcmp(tmp->sym.name, s->sym.name)) | |
430 | break; | |
431 | ||
432 | s = tmp; | |
433 | } | |
434 | ||
435 | return &s->sym; | |
79406cd7 ACM |
436 | } |
437 | ||
aeafcbaf | 438 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 439 | enum map_type type, u64 addr) |
fcf1203a | 440 | { |
aeafcbaf | 441 | return symbols__find(&dso->symbols[type], addr); |
fcf1203a ACM |
442 | } |
443 | ||
9c00a81b | 444 | struct symbol *dso__first_symbol(struct dso *dso, enum map_type type) |
8e0cf965 AH |
445 | { |
446 | return symbols__first(&dso->symbols[type]); | |
9c00a81b AH |
447 | } |
448 | ||
449 | struct symbol *dso__next_symbol(struct symbol *sym) | |
450 | { | |
451 | return symbols__next(sym); | |
8e0cf965 AH |
452 | } |
453 | ||
18bd7264 ACM |
454 | struct symbol *symbol__next_by_name(struct symbol *sym) |
455 | { | |
456 | struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym); | |
457 | struct rb_node *n = rb_next(&s->rb_node); | |
458 | ||
459 | return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL; | |
460 | } | |
461 | ||
462 | /* | |
463 | * Teturns first symbol that matched with @name. | |
464 | */ | |
aeafcbaf | 465 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
466 | const char *name) |
467 | { | |
aeafcbaf | 468 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
469 | } |
470 | ||
aeafcbaf | 471 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 472 | { |
aeafcbaf ACM |
473 | dso__set_sorted_by_name(dso, type); |
474 | return symbols__sort_by_name(&dso->symbol_names[type], | |
475 | &dso->symbols[type]); | |
79406cd7 ACM |
476 | } |
477 | ||
aeafcbaf ACM |
478 | size_t dso__fprintf_symbols_by_name(struct dso *dso, |
479 | enum map_type type, FILE *fp) | |
90f18e63 SD |
480 | { |
481 | size_t ret = 0; | |
482 | struct rb_node *nd; | |
483 | struct symbol_name_rb_node *pos; | |
484 | ||
aeafcbaf | 485 | for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { |
90f18e63 SD |
486 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); |
487 | fprintf(fp, "%s\n", pos->sym.name); | |
488 | } | |
489 | ||
490 | return ret; | |
491 | } | |
492 | ||
316d70d6 AH |
493 | int modules__parse(const char *filename, void *arg, |
494 | int (*process_module)(void *arg, const char *name, | |
495 | u64 start)) | |
496 | { | |
497 | char *line = NULL; | |
498 | size_t n; | |
499 | FILE *file; | |
500 | int err = 0; | |
501 | ||
502 | file = fopen(filename, "r"); | |
503 | if (file == NULL) | |
504 | return -1; | |
505 | ||
506 | while (1) { | |
507 | char name[PATH_MAX]; | |
508 | u64 start; | |
509 | char *sep; | |
510 | ssize_t line_len; | |
511 | ||
512 | line_len = getline(&line, &n, file); | |
513 | if (line_len < 0) { | |
514 | if (feof(file)) | |
515 | break; | |
516 | err = -1; | |
517 | goto out; | |
518 | } | |
519 | ||
520 | if (!line) { | |
521 | err = -1; | |
522 | goto out; | |
523 | } | |
524 | ||
525 | line[--line_len] = '\0'; /* \n */ | |
526 | ||
527 | sep = strrchr(line, 'x'); | |
528 | if (sep == NULL) | |
529 | continue; | |
530 | ||
531 | hex2u64(sep + 1, &start); | |
532 | ||
533 | sep = strchr(line, ' '); | |
534 | if (sep == NULL) | |
535 | continue; | |
536 | ||
537 | *sep = '\0'; | |
538 | ||
539 | scnprintf(name, sizeof(name), "[%s]", line); | |
540 | ||
541 | err = process_module(arg, name, start); | |
542 | if (err) | |
543 | break; | |
544 | } | |
545 | out: | |
546 | free(line); | |
547 | fclose(file); | |
548 | return err; | |
549 | } | |
550 | ||
682b335a ACM |
551 | struct process_kallsyms_args { |
552 | struct map *map; | |
553 | struct dso *dso; | |
554 | }; | |
555 | ||
e7110b9f ACM |
556 | /* |
557 | * These are symbols in the kernel image, so make sure that | |
558 | * sym is from a kernel DSO. | |
559 | */ | |
82d1deb0 DA |
560 | bool symbol__is_idle(struct symbol *sym) |
561 | { | |
562 | const char * const idle_symbols[] = { | |
563 | "cpu_idle", | |
e0336ed6 | 564 | "cpu_startup_entry", |
82d1deb0 DA |
565 | "intel_idle", |
566 | "default_idle", | |
567 | "native_safe_halt", | |
568 | "enter_idle", | |
569 | "exit_idle", | |
570 | "mwait_idle", | |
571 | "mwait_idle_with_hints", | |
572 | "poll_idle", | |
573 | "ppc64_runlatch_off", | |
574 | "pseries_dedicated_idle_sleep", | |
575 | NULL | |
576 | }; | |
577 | ||
578 | int i; | |
579 | ||
580 | if (!sym) | |
581 | return false; | |
582 | ||
583 | for (i = 0; idle_symbols[i]; i++) { | |
584 | if (!strcmp(idle_symbols[i], sym->name)) | |
585 | return true; | |
586 | } | |
587 | ||
588 | return false; | |
589 | } | |
590 | ||
682b335a | 591 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 592 | char type, u64 start) |
682b335a ACM |
593 | { |
594 | struct symbol *sym; | |
595 | struct process_kallsyms_args *a = arg; | |
596 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
597 | ||
598 | if (!symbol_type__is_a(type, a->map->type)) | |
599 | return 0; | |
600 | ||
82151520 CS |
601 | /* |
602 | * module symbols are not sorted so we add all | |
603 | * symbols, setting length to 0, and rely on | |
604 | * symbols__fixup_end() to fix it up. | |
605 | */ | |
606 | sym = symbol__new(start, 0, kallsyms2elf_type(type), name); | |
682b335a ACM |
607 | if (sym == NULL) |
608 | return -ENOMEM; | |
609 | /* | |
610 | * We will pass the symbols to the filter later, in | |
611 | * map__split_kallsyms, when we have split the maps per module | |
612 | */ | |
613 | symbols__insert(root, sym); | |
a1645ce1 | 614 | |
682b335a ACM |
615 | return 0; |
616 | } | |
617 | ||
618 | /* | |
619 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
620 | * so that we can in the next step set the symbol ->end address and then | |
621 | * call kernel_maps__split_kallsyms. | |
622 | */ | |
aeafcbaf | 623 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 624 | struct map *map) |
682b335a | 625 | { |
aeafcbaf | 626 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 627 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
628 | } |
629 | ||
8e0cf965 AH |
630 | static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map, |
631 | symbol_filter_t filter) | |
632 | { | |
633 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
634 | struct map *curr_map; | |
635 | struct symbol *pos; | |
636 | int count = 0, moved = 0; | |
637 | struct rb_root *root = &dso->symbols[map->type]; | |
638 | struct rb_node *next = rb_first(root); | |
639 | ||
640 | while (next) { | |
641 | char *module; | |
642 | ||
643 | pos = rb_entry(next, struct symbol, rb_node); | |
644 | next = rb_next(&pos->rb_node); | |
645 | ||
646 | module = strchr(pos->name, '\t'); | |
647 | if (module) | |
648 | *module = '\0'; | |
649 | ||
650 | curr_map = map_groups__find(kmaps, map->type, pos->start); | |
651 | ||
652 | if (!curr_map || (filter && filter(curr_map, pos))) { | |
653 | rb_erase(&pos->rb_node, root); | |
654 | symbol__delete(pos); | |
655 | } else { | |
656 | pos->start -= curr_map->start - curr_map->pgoff; | |
657 | if (pos->end) | |
658 | pos->end -= curr_map->start - curr_map->pgoff; | |
659 | if (curr_map != map) { | |
660 | rb_erase(&pos->rb_node, root); | |
661 | symbols__insert( | |
662 | &curr_map->dso->symbols[curr_map->type], | |
663 | pos); | |
664 | ++moved; | |
665 | } else { | |
666 | ++count; | |
667 | } | |
668 | } | |
669 | } | |
670 | ||
671 | /* Symbols have been adjusted */ | |
672 | dso->adjust_symbols = 1; | |
673 | ||
674 | return count + moved; | |
675 | } | |
676 | ||
2e538c4a ACM |
677 | /* |
678 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
679 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
680 | * the original ELF section names vmlinux have. | |
681 | */ | |
d9b62aba | 682 | static int dso__split_kallsyms(struct dso *dso, struct map *map, u64 delta, |
9de89fe7 | 683 | symbol_filter_t filter) |
2e538c4a | 684 | { |
9de89fe7 | 685 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 686 | struct machine *machine = kmaps->machine; |
4e06255f | 687 | struct map *curr_map = map; |
2e538c4a | 688 | struct symbol *pos; |
48000a1a | 689 | int count = 0, moved = 0; |
aeafcbaf | 690 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 691 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
692 | int kernel_range = 0; |
693 | ||
694 | while (next) { | |
695 | char *module; | |
696 | ||
697 | pos = rb_entry(next, struct symbol, rb_node); | |
698 | next = rb_next(&pos->rb_node); | |
699 | ||
700 | module = strchr(pos->name, '\t'); | |
701 | if (module) { | |
75be6cf4 | 702 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
703 | goto discard_symbol; |
704 | ||
2e538c4a ACM |
705 | *module++ = '\0'; |
706 | ||
b7cece76 | 707 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 708 | if (curr_map != map && |
aeafcbaf | 709 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 710 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
711 | /* |
712 | * We assume all symbols of a module are | |
713 | * continuous in * kallsyms, so curr_map | |
714 | * points to a module and all its | |
715 | * symbols are in its kmap. Mark it as | |
716 | * loaded. | |
717 | */ | |
718 | dso__set_loaded(curr_map->dso, | |
719 | curr_map->type); | |
720 | } | |
721 | ||
722 | curr_map = map_groups__find_by_name(kmaps, | |
723 | map->type, module); | |
4e06255f | 724 | if (curr_map == NULL) { |
2f51903b | 725 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 726 | "inconsistency while looking " |
a1645ce1 | 727 | "for \"%s\" module!\n", |
23346f21 | 728 | machine->root_dir, module); |
a1645ce1 ZY |
729 | curr_map = map; |
730 | goto discard_symbol; | |
af427bf5 | 731 | } |
b7cece76 | 732 | |
a1645ce1 | 733 | if (curr_map->dso->loaded && |
23346f21 | 734 | !machine__is_default_guest(machine)) |
b7cece76 | 735 | goto discard_symbol; |
af427bf5 | 736 | } |
2e538c4a ACM |
737 | /* |
738 | * So that we look just like we get from .ko files, | |
739 | * i.e. not prelinked, relative to map->start. | |
740 | */ | |
4e06255f ACM |
741 | pos->start = curr_map->map_ip(curr_map, pos->start); |
742 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
743 | } else if (curr_map != map) { | |
2e538c4a | 744 | char dso_name[PATH_MAX]; |
aeafcbaf | 745 | struct dso *ndso; |
2e538c4a | 746 | |
d9b62aba AH |
747 | if (delta) { |
748 | /* Kernel was relocated at boot time */ | |
749 | pos->start -= delta; | |
750 | pos->end -= delta; | |
751 | } | |
752 | ||
8a953312 ACM |
753 | if (count == 0) { |
754 | curr_map = map; | |
755 | goto filter_symbol; | |
756 | } | |
757 | ||
aeafcbaf | 758 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
759 | snprintf(dso_name, sizeof(dso_name), |
760 | "[guest.kernel].%d", | |
761 | kernel_range++); | |
762 | else | |
763 | snprintf(dso_name, sizeof(dso_name), | |
764 | "[kernel].%d", | |
765 | kernel_range++); | |
2e538c4a | 766 | |
aeafcbaf ACM |
767 | ndso = dso__new(dso_name); |
768 | if (ndso == NULL) | |
2e538c4a ACM |
769 | return -1; |
770 | ||
aeafcbaf | 771 | ndso->kernel = dso->kernel; |
a1645ce1 | 772 | |
aeafcbaf | 773 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 774 | if (curr_map == NULL) { |
aeafcbaf | 775 | dso__delete(ndso); |
2e538c4a ACM |
776 | return -1; |
777 | } | |
a2928c42 | 778 | |
4e06255f | 779 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 780 | map_groups__insert(kmaps, curr_map); |
2e538c4a | 781 | ++kernel_range; |
d9b62aba AH |
782 | } else if (delta) { |
783 | /* Kernel was relocated at boot time */ | |
784 | pos->start -= delta; | |
785 | pos->end -= delta; | |
2e538c4a | 786 | } |
8a953312 | 787 | filter_symbol: |
4e06255f | 788 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 789 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 790 | symbol__delete(pos); |
2e538c4a | 791 | } else { |
4e06255f ACM |
792 | if (curr_map != map) { |
793 | rb_erase(&pos->rb_node, root); | |
794 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
795 | ++moved; |
796 | } else | |
797 | ++count; | |
9974f496 | 798 | } |
a2928c42 ACM |
799 | } |
800 | ||
a1645ce1 | 801 | if (curr_map != map && |
aeafcbaf | 802 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 803 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
804 | dso__set_loaded(curr_map->dso, curr_map->type); |
805 | } | |
806 | ||
8a953312 | 807 | return count + moved; |
2e538c4a | 808 | } |
a2928c42 | 809 | |
3f067dca ACM |
810 | bool symbol__restricted_filename(const char *filename, |
811 | const char *restricted_filename) | |
ec80fde7 ACM |
812 | { |
813 | bool restricted = false; | |
814 | ||
815 | if (symbol_conf.kptr_restrict) { | |
816 | char *r = realpath(filename, NULL); | |
817 | ||
818 | if (r != NULL) { | |
819 | restricted = strcmp(r, restricted_filename) == 0; | |
820 | free(r); | |
821 | return restricted; | |
822 | } | |
823 | } | |
824 | ||
825 | return restricted; | |
826 | } | |
827 | ||
52afdaf9 AH |
828 | struct module_info { |
829 | struct rb_node rb_node; | |
830 | char *name; | |
831 | u64 start; | |
8e0cf965 AH |
832 | }; |
833 | ||
52afdaf9 | 834 | static void add_module(struct module_info *mi, struct rb_root *modules) |
8e0cf965 | 835 | { |
52afdaf9 AH |
836 | struct rb_node **p = &modules->rb_node; |
837 | struct rb_node *parent = NULL; | |
838 | struct module_info *m; | |
8e0cf965 | 839 | |
52afdaf9 AH |
840 | while (*p != NULL) { |
841 | parent = *p; | |
842 | m = rb_entry(parent, struct module_info, rb_node); | |
843 | if (strcmp(mi->name, m->name) < 0) | |
844 | p = &(*p)->rb_left; | |
845 | else | |
846 | p = &(*p)->rb_right; | |
847 | } | |
848 | rb_link_node(&mi->rb_node, parent, p); | |
849 | rb_insert_color(&mi->rb_node, modules); | |
850 | } | |
851 | ||
852 | static void delete_modules(struct rb_root *modules) | |
853 | { | |
854 | struct module_info *mi; | |
855 | struct rb_node *next = rb_first(modules); | |
856 | ||
857 | while (next) { | |
858 | mi = rb_entry(next, struct module_info, rb_node); | |
859 | next = rb_next(&mi->rb_node); | |
860 | rb_erase(&mi->rb_node, modules); | |
74cf249d | 861 | zfree(&mi->name); |
52afdaf9 AH |
862 | free(mi); |
863 | } | |
864 | } | |
865 | ||
866 | static struct module_info *find_module(const char *name, | |
867 | struct rb_root *modules) | |
868 | { | |
869 | struct rb_node *n = modules->rb_node; | |
870 | ||
871 | while (n) { | |
872 | struct module_info *m; | |
873 | int cmp; | |
874 | ||
875 | m = rb_entry(n, struct module_info, rb_node); | |
876 | cmp = strcmp(name, m->name); | |
877 | if (cmp < 0) | |
878 | n = n->rb_left; | |
879 | else if (cmp > 0) | |
880 | n = n->rb_right; | |
881 | else | |
882 | return m; | |
883 | } | |
884 | ||
885 | return NULL; | |
886 | } | |
887 | ||
888 | static int __read_proc_modules(void *arg, const char *name, u64 start) | |
889 | { | |
890 | struct rb_root *modules = arg; | |
891 | struct module_info *mi; | |
892 | ||
893 | mi = zalloc(sizeof(struct module_info)); | |
894 | if (!mi) | |
8e0cf965 AH |
895 | return -ENOMEM; |
896 | ||
52afdaf9 AH |
897 | mi->name = strdup(name); |
898 | mi->start = start; | |
8e0cf965 | 899 | |
52afdaf9 AH |
900 | if (!mi->name) { |
901 | free(mi); | |
902 | return -ENOMEM; | |
903 | } | |
904 | ||
905 | add_module(mi, modules); | |
906 | ||
907 | return 0; | |
908 | } | |
909 | ||
910 | static int read_proc_modules(const char *filename, struct rb_root *modules) | |
911 | { | |
912 | if (symbol__restricted_filename(filename, "/proc/modules")) | |
913 | return -1; | |
914 | ||
915 | if (modules__parse(filename, modules, __read_proc_modules)) { | |
916 | delete_modules(modules); | |
917 | return -1; | |
918 | } | |
8e0cf965 AH |
919 | |
920 | return 0; | |
921 | } | |
922 | ||
fc1b691d AH |
923 | int compare_proc_modules(const char *from, const char *to) |
924 | { | |
925 | struct rb_root from_modules = RB_ROOT; | |
926 | struct rb_root to_modules = RB_ROOT; | |
927 | struct rb_node *from_node, *to_node; | |
928 | struct module_info *from_m, *to_m; | |
929 | int ret = -1; | |
930 | ||
931 | if (read_proc_modules(from, &from_modules)) | |
932 | return -1; | |
933 | ||
934 | if (read_proc_modules(to, &to_modules)) | |
935 | goto out_delete_from; | |
936 | ||
937 | from_node = rb_first(&from_modules); | |
938 | to_node = rb_first(&to_modules); | |
939 | while (from_node) { | |
940 | if (!to_node) | |
941 | break; | |
942 | ||
943 | from_m = rb_entry(from_node, struct module_info, rb_node); | |
944 | to_m = rb_entry(to_node, struct module_info, rb_node); | |
945 | ||
946 | if (from_m->start != to_m->start || | |
947 | strcmp(from_m->name, to_m->name)) | |
948 | break; | |
949 | ||
950 | from_node = rb_next(from_node); | |
951 | to_node = rb_next(to_node); | |
952 | } | |
953 | ||
954 | if (!from_node && !to_node) | |
955 | ret = 0; | |
956 | ||
957 | delete_modules(&to_modules); | |
958 | out_delete_from: | |
959 | delete_modules(&from_modules); | |
960 | ||
961 | return ret; | |
962 | } | |
963 | ||
52afdaf9 AH |
964 | static int do_validate_kcore_modules(const char *filename, struct map *map, |
965 | struct map_groups *kmaps) | |
966 | { | |
967 | struct rb_root modules = RB_ROOT; | |
968 | struct map *old_map; | |
969 | int err; | |
970 | ||
971 | err = read_proc_modules(filename, &modules); | |
972 | if (err) | |
973 | return err; | |
974 | ||
975 | old_map = map_groups__first(kmaps, map->type); | |
976 | while (old_map) { | |
977 | struct map *next = map_groups__next(old_map); | |
978 | struct module_info *mi; | |
979 | ||
980 | if (old_map == map || old_map->start == map->start) { | |
981 | /* The kernel map */ | |
982 | old_map = next; | |
983 | continue; | |
984 | } | |
985 | ||
986 | /* Module must be in memory at the same address */ | |
987 | mi = find_module(old_map->dso->short_name, &modules); | |
988 | if (!mi || mi->start != old_map->start) { | |
989 | err = -EINVAL; | |
990 | goto out; | |
991 | } | |
992 | ||
993 | old_map = next; | |
994 | } | |
995 | out: | |
996 | delete_modules(&modules); | |
997 | return err; | |
998 | } | |
999 | ||
8e0cf965 | 1000 | /* |
52afdaf9 | 1001 | * If kallsyms is referenced by name then we look for filename in the same |
8e0cf965 AH |
1002 | * directory. |
1003 | */ | |
52afdaf9 AH |
1004 | static bool filename_from_kallsyms_filename(char *filename, |
1005 | const char *base_name, | |
1006 | const char *kallsyms_filename) | |
8e0cf965 AH |
1007 | { |
1008 | char *name; | |
1009 | ||
52afdaf9 AH |
1010 | strcpy(filename, kallsyms_filename); |
1011 | name = strrchr(filename, '/'); | |
8e0cf965 AH |
1012 | if (!name) |
1013 | return false; | |
1014 | ||
52afdaf9 AH |
1015 | name += 1; |
1016 | ||
1017 | if (!strcmp(name, "kallsyms")) { | |
1018 | strcpy(name, base_name); | |
8e0cf965 AH |
1019 | return true; |
1020 | } | |
1021 | ||
1022 | return false; | |
1023 | } | |
1024 | ||
52afdaf9 AH |
1025 | static int validate_kcore_modules(const char *kallsyms_filename, |
1026 | struct map *map) | |
1027 | { | |
1028 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
1029 | char modules_filename[PATH_MAX]; | |
1030 | ||
1031 | if (!filename_from_kallsyms_filename(modules_filename, "modules", | |
1032 | kallsyms_filename)) | |
1033 | return -EINVAL; | |
1034 | ||
1035 | if (do_validate_kcore_modules(modules_filename, map, kmaps)) | |
1036 | return -EINVAL; | |
1037 | ||
1038 | return 0; | |
1039 | } | |
1040 | ||
a00d28cb AH |
1041 | static int validate_kcore_addresses(const char *kallsyms_filename, |
1042 | struct map *map) | |
1043 | { | |
1044 | struct kmap *kmap = map__kmap(map); | |
1045 | ||
1046 | if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) { | |
1047 | u64 start; | |
1048 | ||
1049 | start = kallsyms__get_function_start(kallsyms_filename, | |
1050 | kmap->ref_reloc_sym->name); | |
1051 | if (start != kmap->ref_reloc_sym->addr) | |
1052 | return -EINVAL; | |
1053 | } | |
1054 | ||
1055 | return validate_kcore_modules(kallsyms_filename, map); | |
1056 | } | |
1057 | ||
52afdaf9 AH |
1058 | struct kcore_mapfn_data { |
1059 | struct dso *dso; | |
1060 | enum map_type type; | |
1061 | struct list_head maps; | |
1062 | }; | |
1063 | ||
1064 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
1065 | { | |
1066 | struct kcore_mapfn_data *md = data; | |
1067 | struct map *map; | |
1068 | ||
1069 | map = map__new2(start, md->dso, md->type); | |
1070 | if (map == NULL) | |
1071 | return -ENOMEM; | |
1072 | ||
1073 | map->end = map->start + len; | |
1074 | map->pgoff = pgoff; | |
1075 | ||
1076 | list_add(&map->node, &md->maps); | |
1077 | ||
1078 | return 0; | |
1079 | } | |
1080 | ||
8e0cf965 AH |
1081 | static int dso__load_kcore(struct dso *dso, struct map *map, |
1082 | const char *kallsyms_filename) | |
1083 | { | |
1084 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
1085 | struct machine *machine = kmaps->machine; | |
1086 | struct kcore_mapfn_data md; | |
1087 | struct map *old_map, *new_map, *replacement_map = NULL; | |
1088 | bool is_64_bit; | |
1089 | int err, fd; | |
1090 | char kcore_filename[PATH_MAX]; | |
1091 | struct symbol *sym; | |
1092 | ||
1093 | /* This function requires that the map is the kernel map */ | |
1094 | if (map != machine->vmlinux_maps[map->type]) | |
1095 | return -EINVAL; | |
1096 | ||
52afdaf9 AH |
1097 | if (!filename_from_kallsyms_filename(kcore_filename, "kcore", |
1098 | kallsyms_filename)) | |
1099 | return -EINVAL; | |
1100 | ||
a00d28cb AH |
1101 | /* Modules and kernel must be present at their original addresses */ |
1102 | if (validate_kcore_addresses(kallsyms_filename, map)) | |
8e0cf965 AH |
1103 | return -EINVAL; |
1104 | ||
1105 | md.dso = dso; | |
1106 | md.type = map->type; | |
1107 | INIT_LIST_HEAD(&md.maps); | |
1108 | ||
1109 | fd = open(kcore_filename, O_RDONLY); | |
1110 | if (fd < 0) | |
1111 | return -EINVAL; | |
1112 | ||
1113 | /* Read new maps into temporary lists */ | |
1114 | err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md, | |
1115 | &is_64_bit); | |
1116 | if (err) | |
1117 | goto out_err; | |
c6d8f2a4 | 1118 | dso->is_64_bit = is_64_bit; |
8e0cf965 AH |
1119 | |
1120 | if (list_empty(&md.maps)) { | |
1121 | err = -EINVAL; | |
1122 | goto out_err; | |
1123 | } | |
1124 | ||
1125 | /* Remove old maps */ | |
1126 | old_map = map_groups__first(kmaps, map->type); | |
1127 | while (old_map) { | |
1128 | struct map *next = map_groups__next(old_map); | |
1129 | ||
1130 | if (old_map != map) | |
1131 | map_groups__remove(kmaps, old_map); | |
1132 | old_map = next; | |
1133 | } | |
1134 | ||
1135 | /* Find the kernel map using the first symbol */ | |
1136 | sym = dso__first_symbol(dso, map->type); | |
1137 | list_for_each_entry(new_map, &md.maps, node) { | |
1138 | if (sym && sym->start >= new_map->start && | |
1139 | sym->start < new_map->end) { | |
1140 | replacement_map = new_map; | |
1141 | break; | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | if (!replacement_map) | |
1146 | replacement_map = list_entry(md.maps.next, struct map, node); | |
1147 | ||
1148 | /* Add new maps */ | |
1149 | while (!list_empty(&md.maps)) { | |
1150 | new_map = list_entry(md.maps.next, struct map, node); | |
1151 | list_del(&new_map->node); | |
1152 | if (new_map == replacement_map) { | |
1153 | map->start = new_map->start; | |
1154 | map->end = new_map->end; | |
1155 | map->pgoff = new_map->pgoff; | |
1156 | map->map_ip = new_map->map_ip; | |
1157 | map->unmap_ip = new_map->unmap_ip; | |
1158 | map__delete(new_map); | |
1159 | /* Ensure maps are correctly ordered */ | |
1160 | map_groups__remove(kmaps, map); | |
1161 | map_groups__insert(kmaps, map); | |
1162 | } else { | |
1163 | map_groups__insert(kmaps, new_map); | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | /* | |
1168 | * Set the data type and long name so that kcore can be read via | |
1169 | * dso__data_read_addr(). | |
1170 | */ | |
1171 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
5f70619d | 1172 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE; |
8e0cf965 | 1173 | else |
5f70619d | 1174 | dso->binary_type = DSO_BINARY_TYPE__KCORE; |
7e155d4d | 1175 | dso__set_long_name(dso, strdup(kcore_filename), true); |
8e0cf965 AH |
1176 | |
1177 | close(fd); | |
1178 | ||
1179 | if (map->type == MAP__FUNCTION) | |
1180 | pr_debug("Using %s for kernel object code\n", kcore_filename); | |
1181 | else | |
1182 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
1183 | ||
1184 | return 0; | |
1185 | ||
1186 | out_err: | |
1187 | while (!list_empty(&md.maps)) { | |
1188 | map = list_entry(md.maps.next, struct map, node); | |
1189 | list_del(&map->node); | |
1190 | map__delete(map); | |
1191 | } | |
1192 | close(fd); | |
1193 | return -EINVAL; | |
1194 | } | |
1195 | ||
d9b62aba AH |
1196 | /* |
1197 | * If the kernel is relocated at boot time, kallsyms won't match. Compute the | |
1198 | * delta based on the relocation reference symbol. | |
1199 | */ | |
1200 | static int kallsyms__delta(struct map *map, const char *filename, u64 *delta) | |
1201 | { | |
1202 | struct kmap *kmap = map__kmap(map); | |
1203 | u64 addr; | |
1204 | ||
1205 | if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name) | |
1206 | return 0; | |
1207 | ||
1208 | addr = kallsyms__get_function_start(filename, | |
1209 | kmap->ref_reloc_sym->name); | |
1210 | if (!addr) | |
1211 | return -1; | |
1212 | ||
1213 | *delta = addr - kmap->ref_reloc_sym->addr; | |
1214 | return 0; | |
1215 | } | |
1216 | ||
aeafcbaf | 1217 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 1218 | struct map *map, symbol_filter_t filter) |
2e538c4a | 1219 | { |
d9b62aba AH |
1220 | u64 delta = 0; |
1221 | ||
ec80fde7 ACM |
1222 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1223 | return -1; | |
1224 | ||
aeafcbaf | 1225 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
1226 | return -1; |
1227 | ||
d9b62aba AH |
1228 | if (kallsyms__delta(map, filename, &delta)) |
1229 | return -1; | |
1230 | ||
694bf407 | 1231 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
1232 | symbols__fixup_end(&dso->symbols[map->type]); |
1233 | ||
aeafcbaf | 1234 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 1235 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 1236 | else |
44f24cb3 | 1237 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 1238 | |
8e0cf965 AH |
1239 | if (!dso__load_kcore(dso, map, filename)) |
1240 | return dso__split_kallsyms_for_kcore(dso, map, filter); | |
1241 | else | |
d9b62aba | 1242 | return dso__split_kallsyms(dso, map, delta, filter); |
af427bf5 ACM |
1243 | } |
1244 | ||
aeafcbaf | 1245 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 1246 | symbol_filter_t filter) |
80d496be PE |
1247 | { |
1248 | char *line = NULL; | |
1249 | size_t n; | |
1250 | FILE *file; | |
1251 | int nr_syms = 0; | |
1252 | ||
aeafcbaf | 1253 | file = fopen(dso->long_name, "r"); |
80d496be PE |
1254 | if (file == NULL) |
1255 | goto out_failure; | |
1256 | ||
1257 | while (!feof(file)) { | |
9cffa8d5 | 1258 | u64 start, size; |
80d496be PE |
1259 | struct symbol *sym; |
1260 | int line_len, len; | |
1261 | ||
1262 | line_len = getline(&line, &n, file); | |
1263 | if (line_len < 0) | |
1264 | break; | |
1265 | ||
1266 | if (!line) | |
1267 | goto out_failure; | |
1268 | ||
1269 | line[--line_len] = '\0'; /* \n */ | |
1270 | ||
1271 | len = hex2u64(line, &start); | |
1272 | ||
1273 | len++; | |
1274 | if (len + 2 >= line_len) | |
1275 | continue; | |
1276 | ||
1277 | len += hex2u64(line + len, &size); | |
1278 | ||
1279 | len++; | |
1280 | if (len + 2 >= line_len) | |
1281 | continue; | |
1282 | ||
c408fedf | 1283 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
1284 | |
1285 | if (sym == NULL) | |
1286 | goto out_delete_line; | |
1287 | ||
439d473b | 1288 | if (filter && filter(map, sym)) |
00a192b3 | 1289 | symbol__delete(sym); |
80d496be | 1290 | else { |
aeafcbaf | 1291 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
1292 | nr_syms++; |
1293 | } | |
1294 | } | |
1295 | ||
1296 | free(line); | |
1297 | fclose(file); | |
1298 | ||
1299 | return nr_syms; | |
1300 | ||
1301 | out_delete_line: | |
1302 | free(line); | |
1303 | out_failure: | |
1304 | return -1; | |
1305 | } | |
1306 | ||
1029f9fe NK |
1307 | static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod, |
1308 | enum dso_binary_type type) | |
1309 | { | |
1310 | switch (type) { | |
1311 | case DSO_BINARY_TYPE__JAVA_JIT: | |
1312 | case DSO_BINARY_TYPE__DEBUGLINK: | |
1313 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
1314 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
1315 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
1316 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: | |
1317 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: | |
1318 | return !kmod && dso->kernel == DSO_TYPE_USER; | |
1319 | ||
1320 | case DSO_BINARY_TYPE__KALLSYMS: | |
1321 | case DSO_BINARY_TYPE__VMLINUX: | |
1322 | case DSO_BINARY_TYPE__KCORE: | |
1323 | return dso->kernel == DSO_TYPE_KERNEL; | |
1324 | ||
1325 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
1326 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
1327 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
1328 | return dso->kernel == DSO_TYPE_GUEST_KERNEL; | |
1329 | ||
1330 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 1331 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
1029f9fe | 1332 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: |
c00c48fc | 1333 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
1029f9fe NK |
1334 | /* |
1335 | * kernel modules know their symtab type - it's set when | |
1336 | * creating a module dso in machine__new_module(). | |
1337 | */ | |
1338 | return kmod && dso->symtab_type == type; | |
1339 | ||
1340 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
1341 | return true; | |
1342 | ||
1343 | case DSO_BINARY_TYPE__NOT_FOUND: | |
1344 | default: | |
1345 | return false; | |
1346 | } | |
1347 | } | |
1348 | ||
aeafcbaf | 1349 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1350 | { |
c338aee8 | 1351 | char *name; |
a2928c42 | 1352 | int ret = -1; |
44f24cb3 | 1353 | u_int i; |
23346f21 | 1354 | struct machine *machine; |
44f24cb3 | 1355 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1356 | int ss_pos = 0; |
1357 | struct symsrc ss_[2]; | |
1358 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
1029f9fe | 1359 | bool kmod; |
a2928c42 | 1360 | |
aeafcbaf | 1361 | dso__set_loaded(dso, map->type); |
66bd8424 | 1362 | |
aeafcbaf ACM |
1363 | if (dso->kernel == DSO_TYPE_KERNEL) |
1364 | return dso__load_kernel_sym(dso, map, filter); | |
1365 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1366 | return dso__load_guest_kernel_sym(dso, map, filter); | |
a1645ce1 | 1367 | |
23346f21 ACM |
1368 | if (map->groups && map->groups->machine) |
1369 | machine = map->groups->machine; | |
a1645ce1 | 1370 | else |
23346f21 | 1371 | machine = NULL; |
c338aee8 | 1372 | |
aeafcbaf | 1373 | dso->adjust_symbols = 0; |
f5812a7a | 1374 | |
aeafcbaf | 1375 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1376 | struct stat st; |
1377 | ||
e9b52ef2 | 1378 | if (lstat(dso->name, &st) < 0) |
981c1252 PE |
1379 | return -1; |
1380 | ||
1381 | if (st.st_uid && (st.st_uid != geteuid())) { | |
1382 | pr_warning("File %s not owned by current user or root, " | |
1383 | "ignoring it.\n", dso->name); | |
1384 | return -1; | |
1385 | } | |
1386 | ||
aeafcbaf | 1387 | ret = dso__load_perf_map(dso, map, filter); |
44f24cb3 JO |
1388 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1389 | DSO_BINARY_TYPE__NOT_FOUND; | |
94cb9e38 ACM |
1390 | return ret; |
1391 | } | |
1392 | ||
44f24cb3 JO |
1393 | if (machine) |
1394 | root_dir = machine->root_dir; | |
1395 | ||
164c800e DA |
1396 | name = malloc(PATH_MAX); |
1397 | if (!name) | |
1398 | return -1; | |
1399 | ||
1029f9fe | 1400 | kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || |
c00c48fc NK |
1401 | dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || |
1402 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE || | |
1403 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
1029f9fe NK |
1404 | |
1405 | /* | |
1406 | * Iterate over candidate debug images. | |
3aafe5ae CS |
1407 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1408 | * and/or opd section) for processing. | |
6da80ce8 | 1409 | */ |
44f24cb3 | 1410 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1411 | struct symsrc *ss = &ss_[ss_pos]; |
1412 | bool next_slot = false; | |
6da80ce8 | 1413 | |
005f9294 | 1414 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1415 | |
1029f9fe NK |
1416 | if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type)) |
1417 | continue; | |
1418 | ||
ee4e9625 ACM |
1419 | if (dso__read_binary_type_filename(dso, symtab_type, |
1420 | root_dir, name, PATH_MAX)) | |
44f24cb3 | 1421 | continue; |
6da80ce8 DM |
1422 | |
1423 | /* Name is now the name of the next image to try */ | |
3aafe5ae | 1424 | if (symsrc__init(ss, dso, name, symtab_type) < 0) |
6da80ce8 | 1425 | continue; |
a2928c42 | 1426 | |
3aafe5ae CS |
1427 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1428 | syms_ss = ss; | |
1429 | next_slot = true; | |
0058aef6 AH |
1430 | if (!dso->symsrc_filename) |
1431 | dso->symsrc_filename = strdup(name); | |
d26cd12b CS |
1432 | } |
1433 | ||
3aafe5ae CS |
1434 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1435 | runtime_ss = ss; | |
1436 | next_slot = true; | |
a44f605b | 1437 | } |
a2928c42 | 1438 | |
3aafe5ae CS |
1439 | if (next_slot) { |
1440 | ss_pos++; | |
33ff581e | 1441 | |
3aafe5ae CS |
1442 | if (syms_ss && runtime_ss) |
1443 | break; | |
98e9f03b NK |
1444 | } else { |
1445 | symsrc__destroy(ss); | |
6da80ce8 | 1446 | } |
3aafe5ae | 1447 | |
a25e46c4 | 1448 | } |
6da80ce8 | 1449 | |
3aafe5ae CS |
1450 | if (!runtime_ss && !syms_ss) |
1451 | goto out_free; | |
1452 | ||
1453 | if (runtime_ss && !syms_ss) { | |
1454 | syms_ss = runtime_ss; | |
1455 | } | |
1456 | ||
1457 | /* We'll have to hope for the best */ | |
1458 | if (!runtime_ss && syms_ss) | |
1459 | runtime_ss = syms_ss; | |
1460 | ||
1029f9fe NK |
1461 | if (syms_ss) |
1462 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, kmod); | |
1463 | else | |
3aafe5ae CS |
1464 | ret = -1; |
1465 | ||
f47b58b7 | 1466 | if (ret > 0) { |
3aafe5ae CS |
1467 | int nr_plt; |
1468 | ||
1469 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map, filter); | |
1470 | if (nr_plt > 0) | |
1471 | ret += nr_plt; | |
60e4b10c ACM |
1472 | } |
1473 | ||
3aafe5ae CS |
1474 | for (; ss_pos > 0; ss_pos--) |
1475 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1476 | out_free: | |
a2928c42 | 1477 | free(name); |
aeafcbaf | 1478 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
1340e6bb | 1479 | return 0; |
a2928c42 ACM |
1480 | return ret; |
1481 | } | |
1482 | ||
aeafcbaf | 1483 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1484 | enum map_type type, const char *name) |
439d473b ACM |
1485 | { |
1486 | struct rb_node *nd; | |
1487 | ||
aeafcbaf | 1488 | for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1489 | struct map *map = rb_entry(nd, struct map, rb_node); |
1490 | ||
b7cece76 | 1491 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1492 | return map; |
1493 | } | |
1494 | ||
1495 | return NULL; | |
1496 | } | |
1497 | ||
aeafcbaf | 1498 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
5230fb7d ACM |
1499 | const char *vmlinux, bool vmlinux_allocated, |
1500 | symbol_filter_t filter) | |
a2928c42 | 1501 | { |
b68e2f91 CS |
1502 | int err = -1; |
1503 | struct symsrc ss; | |
ec5761ea | 1504 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1505 | enum dso_binary_type symtab_type; |
a2928c42 | 1506 | |
5698d2c9 NK |
1507 | if (vmlinux[0] == '/') |
1508 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1509 | else | |
972f393b | 1510 | symbol__join_symfs(symfs_vmlinux, vmlinux); |
a2928c42 | 1511 | |
21ea4539 | 1512 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1513 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1514 | else |
005f9294 | 1515 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1516 | |
005f9294 | 1517 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1518 | return -1; |
1519 | ||
261360b6 | 1520 | err = dso__load_sym(dso, map, &ss, &ss, filter, 0); |
b68e2f91 | 1521 | symsrc__destroy(&ss); |
a2928c42 | 1522 | |
515850e4 | 1523 | if (err > 0) { |
39b12f78 | 1524 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
5f70619d | 1525 | dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
39b12f78 | 1526 | else |
5f70619d | 1527 | dso->binary_type = DSO_BINARY_TYPE__VMLINUX; |
bf4414ae | 1528 | dso__set_long_name(dso, vmlinux, vmlinux_allocated); |
515850e4 | 1529 | dso__set_loaded(dso, map->type); |
ec5761ea | 1530 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1531 | } |
3846df2e | 1532 | |
a2928c42 ACM |
1533 | return err; |
1534 | } | |
1535 | ||
aeafcbaf | 1536 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 1537 | symbol_filter_t filter) |
a19afe46 ACM |
1538 | { |
1539 | int i, err = 0; | |
00dc8657 | 1540 | char *filename = NULL; |
a19afe46 | 1541 | |
00dc8657 NK |
1542 | if (!symbol_conf.ignore_vmlinux_buildid) |
1543 | filename = dso__build_id_filename(dso, NULL, 0); | |
5ad90e4e | 1544 | if (filename != NULL) { |
5230fb7d ACM |
1545 | err = dso__load_vmlinux(dso, map, filename, true, filter); |
1546 | if (err > 0) | |
5ad90e4e | 1547 | goto out; |
5ad90e4e ACM |
1548 | free(filename); |
1549 | } | |
a19afe46 | 1550 | |
00dc8657 NK |
1551 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", |
1552 | vmlinux_path__nr_entries + 1); | |
1553 | ||
a19afe46 | 1554 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { |
5230fb7d ACM |
1555 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], false, filter); |
1556 | if (err > 0) | |
a19afe46 | 1557 | break; |
a19afe46 | 1558 | } |
5ad90e4e | 1559 | out: |
a19afe46 ACM |
1560 | return err; |
1561 | } | |
1562 | ||
0544d422 AH |
1563 | static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz) |
1564 | { | |
1565 | char kallsyms_filename[PATH_MAX]; | |
1566 | struct dirent *dent; | |
1567 | int ret = -1; | |
1568 | DIR *d; | |
1569 | ||
1570 | d = opendir(dir); | |
1571 | if (!d) | |
1572 | return -1; | |
1573 | ||
1574 | while (1) { | |
1575 | dent = readdir(d); | |
1576 | if (!dent) | |
1577 | break; | |
1578 | if (dent->d_type != DT_DIR) | |
1579 | continue; | |
1580 | scnprintf(kallsyms_filename, sizeof(kallsyms_filename), | |
1581 | "%s/%s/kallsyms", dir, dent->d_name); | |
a00d28cb | 1582 | if (!validate_kcore_addresses(kallsyms_filename, map)) { |
0544d422 AH |
1583 | strlcpy(dir, kallsyms_filename, dir_sz); |
1584 | ret = 0; | |
1585 | break; | |
1586 | } | |
1587 | } | |
1588 | ||
1589 | closedir(d); | |
1590 | ||
1591 | return ret; | |
1592 | } | |
1593 | ||
1594 | static char *dso__find_kallsyms(struct dso *dso, struct map *map) | |
1595 | { | |
1596 | u8 host_build_id[BUILD_ID_SIZE]; | |
1597 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
1598 | bool is_host = false; | |
1599 | char path[PATH_MAX]; | |
1600 | ||
1601 | if (!dso->has_build_id) { | |
1602 | /* | |
1603 | * Last resort, if we don't have a build-id and couldn't find | |
1604 | * any vmlinux file, try the running kernel kallsyms table. | |
1605 | */ | |
1606 | goto proc_kallsyms; | |
1607 | } | |
1608 | ||
1609 | if (sysfs__read_build_id("/sys/kernel/notes", host_build_id, | |
1610 | sizeof(host_build_id)) == 0) | |
1611 | is_host = dso__build_id_equal(dso, host_build_id); | |
1612 | ||
1613 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
1614 | ||
449867e3 AH |
1615 | scnprintf(path, sizeof(path), "%s/[kernel.kcore]/%s", buildid_dir, |
1616 | sbuild_id); | |
1617 | ||
0544d422 AH |
1618 | /* Use /proc/kallsyms if possible */ |
1619 | if (is_host) { | |
1620 | DIR *d; | |
1621 | int fd; | |
1622 | ||
1623 | /* If no cached kcore go with /proc/kallsyms */ | |
0544d422 AH |
1624 | d = opendir(path); |
1625 | if (!d) | |
1626 | goto proc_kallsyms; | |
1627 | closedir(d); | |
1628 | ||
1629 | /* | |
1630 | * Do not check the build-id cache, until we know we cannot use | |
1631 | * /proc/kcore. | |
1632 | */ | |
1633 | fd = open("/proc/kcore", O_RDONLY); | |
1634 | if (fd != -1) { | |
1635 | close(fd); | |
1636 | /* If module maps match go with /proc/kallsyms */ | |
a00d28cb | 1637 | if (!validate_kcore_addresses("/proc/kallsyms", map)) |
0544d422 AH |
1638 | goto proc_kallsyms; |
1639 | } | |
1640 | ||
1641 | /* Find kallsyms in build-id cache with kcore */ | |
1642 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1643 | return strdup(path); | |
1644 | ||
1645 | goto proc_kallsyms; | |
1646 | } | |
1647 | ||
449867e3 AH |
1648 | /* Find kallsyms in build-id cache with kcore */ |
1649 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1650 | return strdup(path); | |
1651 | ||
0544d422 AH |
1652 | scnprintf(path, sizeof(path), "%s/[kernel.kallsyms]/%s", |
1653 | buildid_dir, sbuild_id); | |
1654 | ||
1655 | if (access(path, F_OK)) { | |
1656 | pr_err("No kallsyms or vmlinux with build-id %s was found\n", | |
1657 | sbuild_id); | |
1658 | return NULL; | |
1659 | } | |
1660 | ||
1661 | return strdup(path); | |
1662 | ||
1663 | proc_kallsyms: | |
1664 | return strdup("/proc/kallsyms"); | |
1665 | } | |
1666 | ||
aeafcbaf | 1667 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 1668 | symbol_filter_t filter) |
a827c875 | 1669 | { |
cc612d81 | 1670 | int err; |
9e201442 ACM |
1671 | const char *kallsyms_filename = NULL; |
1672 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1673 | /* |
b226a5a7 DA |
1674 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1675 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1676 | * |
1677 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1678 | * build-id, or if the user specifies the wrong path to the right | |
1679 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1680 | * x86_86 one, on the machine where analysis is being performed, say), | |
1681 | * or worse, /proc/kallsyms. | |
1682 | * | |
1683 | * If the specified file _has_ a build-id and there is a build-id | |
1684 | * section in the perf.data file, we will still do the expected | |
1685 | * validation in dso__load_vmlinux and will bail out if they don't | |
1686 | * match. | |
1687 | */ | |
b226a5a7 DA |
1688 | if (symbol_conf.kallsyms_name != NULL) { |
1689 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1690 | goto do_kallsyms; | |
1691 | } | |
1692 | ||
fc2be696 | 1693 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
5230fb7d ACM |
1694 | return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, |
1695 | false, filter); | |
dc8d6ab2 | 1696 | } |
cc612d81 | 1697 | |
fc2be696 | 1698 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
aeafcbaf | 1699 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 | 1700 | if (err > 0) |
39b12f78 | 1701 | return err; |
cc612d81 ACM |
1702 | } |
1703 | ||
ec5761ea DA |
1704 | /* do not try local files if a symfs was given */ |
1705 | if (symbol_conf.symfs[0] != 0) | |
1706 | return -1; | |
1707 | ||
0544d422 AH |
1708 | kallsyms_allocated_filename = dso__find_kallsyms(dso, map); |
1709 | if (!kallsyms_allocated_filename) | |
1710 | return -1; | |
19fc2ded | 1711 | |
0544d422 | 1712 | kallsyms_filename = kallsyms_allocated_filename; |
439d473b | 1713 | |
cc612d81 | 1714 | do_kallsyms: |
aeafcbaf | 1715 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
1716 | if (err > 0) |
1717 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1718 | free(kallsyms_allocated_filename); |
439d473b | 1719 | |
8e0cf965 | 1720 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1721 | dso->binary_type = DSO_BINARY_TYPE__KALLSYMS; |
bf4414ae | 1722 | dso__set_long_name(dso, "[kernel.kallsyms]", false); |
6a4694a4 ACM |
1723 | map__fixup_start(map); |
1724 | map__fixup_end(map); | |
439d473b | 1725 | } |
94cb9e38 | 1726 | |
a827c875 ACM |
1727 | return err; |
1728 | } | |
1729 | ||
aeafcbaf ACM |
1730 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
1731 | symbol_filter_t filter) | |
a1645ce1 ZY |
1732 | { |
1733 | int err; | |
1734 | const char *kallsyms_filename = NULL; | |
23346f21 | 1735 | struct machine *machine; |
a1645ce1 ZY |
1736 | char path[PATH_MAX]; |
1737 | ||
1738 | if (!map->groups) { | |
1739 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1740 | return -1; | |
1741 | } | |
23346f21 | 1742 | machine = map->groups->machine; |
a1645ce1 | 1743 | |
23346f21 | 1744 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1745 | /* |
1746 | * if the user specified a vmlinux filename, use it and only | |
1747 | * it, reporting errors to the user if it cannot be used. | |
1748 | * Or use file guest_kallsyms inputted by user on commandline | |
1749 | */ | |
1750 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1751 | err = dso__load_vmlinux(dso, map, |
5230fb7d ACM |
1752 | symbol_conf.default_guest_vmlinux_name, |
1753 | false, filter); | |
39b12f78 | 1754 | return err; |
a1645ce1 ZY |
1755 | } |
1756 | ||
1757 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1758 | if (!kallsyms_filename) | |
1759 | return -1; | |
1760 | } else { | |
23346f21 | 1761 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1762 | kallsyms_filename = path; |
1763 | } | |
1764 | ||
aeafcbaf | 1765 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
8e0cf965 | 1766 | if (err > 0) |
39b12f78 | 1767 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 1768 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1769 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
39b12f78 | 1770 | machine__mmap_name(machine, path, sizeof(path)); |
7e155d4d | 1771 | dso__set_long_name(dso, strdup(path), true); |
a1645ce1 ZY |
1772 | map__fixup_start(map); |
1773 | map__fixup_end(map); | |
1774 | } | |
1775 | ||
1776 | return err; | |
1777 | } | |
cd84c2ac | 1778 | |
cc612d81 ACM |
1779 | static void vmlinux_path__exit(void) |
1780 | { | |
04662523 ACM |
1781 | while (--vmlinux_path__nr_entries >= 0) |
1782 | zfree(&vmlinux_path[vmlinux_path__nr_entries]); | |
cc612d81 | 1783 | |
04662523 | 1784 | zfree(&vmlinux_path); |
cc612d81 ACM |
1785 | } |
1786 | ||
0a7e6d1b | 1787 | static int vmlinux_path__init(struct perf_session_env *env) |
cc612d81 ACM |
1788 | { |
1789 | struct utsname uts; | |
1790 | char bf[PATH_MAX]; | |
0a7e6d1b | 1791 | char *kernel_version; |
cc612d81 | 1792 | |
c657f423 | 1793 | vmlinux_path = malloc(sizeof(char *) * 6); |
cc612d81 ACM |
1794 | if (vmlinux_path == NULL) |
1795 | return -1; | |
1796 | ||
1797 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
1798 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1799 | goto out_fail; | |
1800 | ++vmlinux_path__nr_entries; | |
1801 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
1802 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1803 | goto out_fail; | |
1804 | ++vmlinux_path__nr_entries; | |
ec5761ea | 1805 | |
0a7e6d1b | 1806 | /* only try kernel version if no symfs was given */ |
ec5761ea DA |
1807 | if (symbol_conf.symfs[0] != 0) |
1808 | return 0; | |
1809 | ||
0a7e6d1b NK |
1810 | if (env) { |
1811 | kernel_version = env->os_release; | |
1812 | } else { | |
1813 | if (uname(&uts) < 0) | |
1814 | goto out_fail; | |
1815 | ||
1816 | kernel_version = uts.release; | |
1817 | } | |
ec5761ea | 1818 | |
0a7e6d1b | 1819 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", kernel_version); |
cc612d81 ACM |
1820 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); |
1821 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1822 | goto out_fail; | |
1823 | ++vmlinux_path__nr_entries; | |
c657f423 AB |
1824 | snprintf(bf, sizeof(bf), "/usr/lib/debug/boot/vmlinux-%s", |
1825 | kernel_version); | |
1826 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1827 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1828 | goto out_fail; | |
1829 | ++vmlinux_path__nr_entries; | |
0a7e6d1b | 1830 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", kernel_version); |
cc612d81 ACM |
1831 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); |
1832 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1833 | goto out_fail; | |
1834 | ++vmlinux_path__nr_entries; | |
1835 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
0a7e6d1b | 1836 | kernel_version); |
cc612d81 ACM |
1837 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); |
1838 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1839 | goto out_fail; | |
1840 | ++vmlinux_path__nr_entries; | |
1841 | ||
1842 | return 0; | |
1843 | ||
1844 | out_fail: | |
1845 | vmlinux_path__exit(); | |
1846 | return -1; | |
1847 | } | |
1848 | ||
3bfe5f81 | 1849 | int setup_list(struct strlist **list, const char *list_str, |
655000e7 ACM |
1850 | const char *list_name) |
1851 | { | |
1852 | if (list_str == NULL) | |
1853 | return 0; | |
1854 | ||
1855 | *list = strlist__new(true, list_str); | |
1856 | if (!*list) { | |
1857 | pr_err("problems parsing %s list\n", list_name); | |
1858 | return -1; | |
1859 | } | |
1860 | return 0; | |
1861 | } | |
1862 | ||
e03eaa40 DA |
1863 | int setup_intlist(struct intlist **list, const char *list_str, |
1864 | const char *list_name) | |
1865 | { | |
1866 | if (list_str == NULL) | |
1867 | return 0; | |
1868 | ||
1869 | *list = intlist__new(list_str); | |
1870 | if (!*list) { | |
1871 | pr_err("problems parsing %s list\n", list_name); | |
1872 | return -1; | |
1873 | } | |
1874 | return 0; | |
1875 | } | |
1876 | ||
ec80fde7 ACM |
1877 | static bool symbol__read_kptr_restrict(void) |
1878 | { | |
1879 | bool value = false; | |
1880 | ||
1881 | if (geteuid() != 0) { | |
1882 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
1883 | if (fp != NULL) { | |
1884 | char line[8]; | |
1885 | ||
1886 | if (fgets(line, sizeof(line), fp) != NULL) | |
1887 | value = atoi(line) != 0; | |
1888 | ||
1889 | fclose(fp); | |
1890 | } | |
1891 | } | |
1892 | ||
1893 | return value; | |
1894 | } | |
1895 | ||
0a7e6d1b | 1896 | int symbol__init(struct perf_session_env *env) |
2446042c | 1897 | { |
ec5761ea DA |
1898 | const char *symfs; |
1899 | ||
85e00b55 JZ |
1900 | if (symbol_conf.initialized) |
1901 | return 0; | |
1902 | ||
9ac3e487 | 1903 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 1904 | |
166ccc9c NK |
1905 | symbol__elf_init(); |
1906 | ||
75be6cf4 ACM |
1907 | if (symbol_conf.sort_by_name) |
1908 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
1909 | sizeof(struct symbol)); | |
b32d133a | 1910 | |
0a7e6d1b | 1911 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0) |
2446042c ACM |
1912 | return -1; |
1913 | ||
c410a338 ACM |
1914 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
1915 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
1916 | return -1; | |
1917 | } | |
1918 | ||
655000e7 ACM |
1919 | if (setup_list(&symbol_conf.dso_list, |
1920 | symbol_conf.dso_list_str, "dso") < 0) | |
1921 | return -1; | |
1922 | ||
1923 | if (setup_list(&symbol_conf.comm_list, | |
1924 | symbol_conf.comm_list_str, "comm") < 0) | |
1925 | goto out_free_dso_list; | |
1926 | ||
e03eaa40 DA |
1927 | if (setup_intlist(&symbol_conf.pid_list, |
1928 | symbol_conf.pid_list_str, "pid") < 0) | |
1929 | goto out_free_comm_list; | |
1930 | ||
1931 | if (setup_intlist(&symbol_conf.tid_list, | |
1932 | symbol_conf.tid_list_str, "tid") < 0) | |
1933 | goto out_free_pid_list; | |
1934 | ||
655000e7 ACM |
1935 | if (setup_list(&symbol_conf.sym_list, |
1936 | symbol_conf.sym_list_str, "symbol") < 0) | |
e03eaa40 | 1937 | goto out_free_tid_list; |
655000e7 | 1938 | |
ec5761ea DA |
1939 | /* |
1940 | * A path to symbols of "/" is identical to "" | |
1941 | * reset here for simplicity. | |
1942 | */ | |
1943 | symfs = realpath(symbol_conf.symfs, NULL); | |
1944 | if (symfs == NULL) | |
1945 | symfs = symbol_conf.symfs; | |
1946 | if (strcmp(symfs, "/") == 0) | |
1947 | symbol_conf.symfs = ""; | |
1948 | if (symfs != symbol_conf.symfs) | |
1949 | free((void *)symfs); | |
1950 | ||
ec80fde7 ACM |
1951 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
1952 | ||
85e00b55 | 1953 | symbol_conf.initialized = true; |
4aa65636 | 1954 | return 0; |
655000e7 | 1955 | |
e03eaa40 DA |
1956 | out_free_tid_list: |
1957 | intlist__delete(symbol_conf.tid_list); | |
1958 | out_free_pid_list: | |
1959 | intlist__delete(symbol_conf.pid_list); | |
655000e7 ACM |
1960 | out_free_comm_list: |
1961 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
1962 | out_free_dso_list: |
1963 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 1964 | return -1; |
4aa65636 ACM |
1965 | } |
1966 | ||
d65a458b ACM |
1967 | void symbol__exit(void) |
1968 | { | |
85e00b55 JZ |
1969 | if (!symbol_conf.initialized) |
1970 | return; | |
d65a458b ACM |
1971 | strlist__delete(symbol_conf.sym_list); |
1972 | strlist__delete(symbol_conf.dso_list); | |
1973 | strlist__delete(symbol_conf.comm_list); | |
e03eaa40 DA |
1974 | intlist__delete(symbol_conf.tid_list); |
1975 | intlist__delete(symbol_conf.pid_list); | |
d65a458b ACM |
1976 | vmlinux_path__exit(); |
1977 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 1978 | symbol_conf.initialized = false; |
d65a458b | 1979 | } |