]>
Commit | Line | Data |
---|---|---|
5aab621b ACM |
1 | #include <dirent.h> |
2 | #include <errno.h> | |
5aab621b ACM |
3 | #include <stdlib.h> |
4 | #include <stdio.h> | |
5 | #include <string.h> | |
6 | #include <sys/types.h> | |
7 | #include <sys/stat.h> | |
8 | #include <sys/param.h> | |
9 | #include <fcntl.h> | |
10 | #include <unistd.h> | |
9486aa38 | 11 | #include <inttypes.h> |
b36f19d5 | 12 | #include "build-id.h" |
e334c726 | 13 | #include "util.h" |
8a6c5b26 | 14 | #include "debug.h" |
69d2591a | 15 | #include "machine.h" |
a2928c42 | 16 | #include "symbol.h" |
5aab621b | 17 | #include "strlist.h" |
a2928c42 | 18 | |
a2928c42 | 19 | #include <elf.h> |
f1617b40 | 20 | #include <limits.h> |
439d473b | 21 | #include <sys/utsname.h> |
2cdbc46d | 22 | |
3b01a413 | 23 | #ifndef KSYM_NAME_LEN |
c752d040 | 24 | #define KSYM_NAME_LEN 256 |
3b01a413 ACM |
25 | #endif |
26 | ||
aeafcbaf | 27 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 28 | symbol_filter_t filter); |
aeafcbaf | 29 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
a1645ce1 | 30 | symbol_filter_t filter); |
3f067dca ACM |
31 | int vmlinux_path__nr_entries; |
32 | char **vmlinux_path; | |
439d473b | 33 | |
75be6cf4 | 34 | struct symbol_conf symbol_conf = { |
b32d133a ACM |
35 | .use_modules = true, |
36 | .try_vmlinux_path = true, | |
3e6a2a7f | 37 | .annotate_src = true, |
328ccdac | 38 | .demangle = true, |
ec5761ea | 39 | .symfs = "", |
b32d133a ACM |
40 | }; |
41 | ||
44f24cb3 JO |
42 | static enum dso_binary_type binary_type_symtab[] = { |
43 | DSO_BINARY_TYPE__KALLSYMS, | |
44 | DSO_BINARY_TYPE__GUEST_KALLSYMS, | |
45 | DSO_BINARY_TYPE__JAVA_JIT, | |
46 | DSO_BINARY_TYPE__DEBUGLINK, | |
47 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
48 | DSO_BINARY_TYPE__FEDORA_DEBUGINFO, | |
49 | DSO_BINARY_TYPE__UBUNTU_DEBUGINFO, | |
50 | DSO_BINARY_TYPE__BUILDID_DEBUGINFO, | |
51 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
52 | DSO_BINARY_TYPE__GUEST_KMODULE, | |
53 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE, | |
9cd00941 | 54 | DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO, |
44f24cb3 JO |
55 | DSO_BINARY_TYPE__NOT_FOUND, |
56 | }; | |
57 | ||
028df767 | 58 | #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab) |
44f24cb3 | 59 | |
36a3e646 | 60 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee | 61 | { |
31877908 AB |
62 | symbol_type = toupper(symbol_type); |
63 | ||
6893d4ee ACM |
64 | switch (map_type) { |
65 | case MAP__FUNCTION: | |
66 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 | 67 | case MAP__VARIABLE: |
31877908 | 68 | return symbol_type == 'D'; |
6893d4ee ACM |
69 | default: |
70 | return false; | |
71 | } | |
72 | } | |
73 | ||
694bf407 AB |
74 | static int prefix_underscores_count(const char *str) |
75 | { | |
76 | const char *tail = str; | |
77 | ||
78 | while (*tail == '_') | |
79 | tail++; | |
80 | ||
81 | return tail - str; | |
82 | } | |
83 | ||
84 | #define SYMBOL_A 0 | |
85 | #define SYMBOL_B 1 | |
86 | ||
87 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
88 | { | |
89 | s64 a; | |
90 | s64 b; | |
3445432b | 91 | size_t na, nb; |
694bf407 AB |
92 | |
93 | /* Prefer a symbol with non zero length */ | |
94 | a = syma->end - syma->start; | |
95 | b = symb->end - symb->start; | |
96 | if ((b == 0) && (a > 0)) | |
97 | return SYMBOL_A; | |
98 | else if ((a == 0) && (b > 0)) | |
99 | return SYMBOL_B; | |
100 | ||
101 | /* Prefer a non weak symbol over a weak one */ | |
102 | a = syma->binding == STB_WEAK; | |
103 | b = symb->binding == STB_WEAK; | |
104 | if (b && !a) | |
105 | return SYMBOL_A; | |
106 | if (a && !b) | |
107 | return SYMBOL_B; | |
108 | ||
109 | /* Prefer a global symbol over a non global one */ | |
110 | a = syma->binding == STB_GLOBAL; | |
111 | b = symb->binding == STB_GLOBAL; | |
112 | if (a && !b) | |
113 | return SYMBOL_A; | |
114 | if (b && !a) | |
115 | return SYMBOL_B; | |
116 | ||
117 | /* Prefer a symbol with less underscores */ | |
118 | a = prefix_underscores_count(syma->name); | |
119 | b = prefix_underscores_count(symb->name); | |
120 | if (b > a) | |
121 | return SYMBOL_A; | |
122 | else if (a > b) | |
123 | return SYMBOL_B; | |
124 | ||
3445432b AH |
125 | /* Choose the symbol with the longest name */ |
126 | na = strlen(syma->name); | |
127 | nb = strlen(symb->name); | |
128 | if (na > nb) | |
694bf407 | 129 | return SYMBOL_A; |
3445432b | 130 | else if (na < nb) |
694bf407 | 131 | return SYMBOL_B; |
3445432b AH |
132 | |
133 | /* Avoid "SyS" kernel syscall aliases */ | |
134 | if (na >= 3 && !strncmp(syma->name, "SyS", 3)) | |
135 | return SYMBOL_B; | |
136 | if (na >= 10 && !strncmp(syma->name, "compat_SyS", 10)) | |
137 | return SYMBOL_B; | |
138 | ||
139 | return SYMBOL_A; | |
694bf407 AB |
140 | } |
141 | ||
e5a1845f | 142 | void symbols__fixup_duplicate(struct rb_root *symbols) |
694bf407 AB |
143 | { |
144 | struct rb_node *nd; | |
145 | struct symbol *curr, *next; | |
146 | ||
147 | nd = rb_first(symbols); | |
148 | ||
149 | while (nd) { | |
150 | curr = rb_entry(nd, struct symbol, rb_node); | |
151 | again: | |
152 | nd = rb_next(&curr->rb_node); | |
153 | next = rb_entry(nd, struct symbol, rb_node); | |
154 | ||
155 | if (!nd) | |
156 | break; | |
157 | ||
158 | if (curr->start != next->start) | |
159 | continue; | |
160 | ||
161 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
162 | rb_erase(&next->rb_node, symbols); | |
163 | goto again; | |
164 | } else { | |
165 | nd = rb_next(&curr->rb_node); | |
166 | rb_erase(&curr->rb_node, symbols); | |
167 | } | |
168 | } | |
169 | } | |
170 | ||
e5a1845f | 171 | void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 172 | { |
aeafcbaf | 173 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 174 | struct symbol *curr, *prev; |
af427bf5 ACM |
175 | |
176 | if (prevnd == NULL) | |
177 | return; | |
178 | ||
2e538c4a ACM |
179 | curr = rb_entry(prevnd, struct symbol, rb_node); |
180 | ||
af427bf5 | 181 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
182 | prev = curr; |
183 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 184 | |
3b01a413 | 185 | if (prev->end == prev->start && prev->end != curr->start) |
af427bf5 | 186 | prev->end = curr->start - 1; |
af427bf5 | 187 | } |
2e538c4a ACM |
188 | |
189 | /* Last entry */ | |
190 | if (curr->end == curr->start) | |
191 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
192 | } |
193 | ||
e5a1845f | 194 | void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 ACM |
195 | { |
196 | struct map *prev, *curr; | |
aeafcbaf | 197 | struct rb_node *nd, *prevnd = rb_first(&mg->maps[type]); |
af427bf5 ACM |
198 | |
199 | if (prevnd == NULL) | |
200 | return; | |
201 | ||
202 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
203 | |
204 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
205 | prev = curr; | |
206 | curr = rb_entry(nd, struct map, rb_node); | |
207 | prev->end = curr->start - 1; | |
2e538c4a | 208 | } |
90c83218 ACM |
209 | |
210 | /* | |
211 | * We still haven't the actual symbols, so guess the | |
212 | * last map final address. | |
213 | */ | |
9d1faba5 | 214 | curr->end = ~0ULL; |
af427bf5 ACM |
215 | } |
216 | ||
e5a1845f | 217 | struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name) |
a2928c42 | 218 | { |
0085c954 | 219 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
220 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
221 | sizeof(*sym) + namelen)); | |
222 | if (sym == NULL) | |
0b73da3f IM |
223 | return NULL; |
224 | ||
75be6cf4 | 225 | if (symbol_conf.priv_size) |
aeafcbaf | 226 | sym = ((void *)sym) + symbol_conf.priv_size; |
e4204992 | 227 | |
aeafcbaf ACM |
228 | sym->start = start; |
229 | sym->end = len ? start + len - 1 : start; | |
230 | sym->binding = binding; | |
231 | sym->namelen = namelen - 1; | |
e4204992 | 232 | |
aeafcbaf ACM |
233 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
234 | __func__, name, start, sym->end); | |
235 | memcpy(sym->name, name, namelen); | |
a2928c42 | 236 | |
aeafcbaf | 237 | return sym; |
a2928c42 ACM |
238 | } |
239 | ||
aeafcbaf | 240 | void symbol__delete(struct symbol *sym) |
a2928c42 | 241 | { |
aeafcbaf | 242 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
243 | } |
244 | ||
cdd059d7 | 245 | size_t symbol__fprintf(struct symbol *sym, FILE *fp) |
a2928c42 | 246 | { |
9486aa38 | 247 | return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n", |
aeafcbaf ACM |
248 | sym->start, sym->end, |
249 | sym->binding == STB_GLOBAL ? 'g' : | |
250 | sym->binding == STB_LOCAL ? 'l' : 'w', | |
251 | sym->name); | |
a2928c42 ACM |
252 | } |
253 | ||
a978f2ab AN |
254 | size_t symbol__fprintf_symname_offs(const struct symbol *sym, |
255 | const struct addr_location *al, FILE *fp) | |
547a92e0 | 256 | { |
a978f2ab AN |
257 | unsigned long offset; |
258 | size_t length; | |
259 | ||
260 | if (sym && sym->name) { | |
261 | length = fprintf(fp, "%s", sym->name); | |
262 | if (al) { | |
0b8c25d9 DA |
263 | if (al->addr < sym->end) |
264 | offset = al->addr - sym->start; | |
265 | else | |
266 | offset = al->addr - al->map->start - sym->start; | |
a978f2ab AN |
267 | length += fprintf(fp, "+0x%lx", offset); |
268 | } | |
269 | return length; | |
270 | } else | |
271 | return fprintf(fp, "[unknown]"); | |
272 | } | |
547a92e0 | 273 | |
a978f2ab AN |
274 | size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp) |
275 | { | |
276 | return symbol__fprintf_symname_offs(sym, NULL, fp); | |
547a92e0 AN |
277 | } |
278 | ||
cdd059d7 | 279 | void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
280 | { |
281 | struct symbol *pos; | |
aeafcbaf | 282 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
283 | |
284 | while (next) { | |
285 | pos = rb_entry(next, struct symbol, rb_node); | |
286 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 287 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 288 | symbol__delete(pos); |
a2928c42 ACM |
289 | } |
290 | } | |
291 | ||
e5a1845f | 292 | void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
a2928c42 | 293 | { |
aeafcbaf | 294 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 295 | struct rb_node *parent = NULL; |
9cffa8d5 | 296 | const u64 ip = sym->start; |
a2928c42 ACM |
297 | struct symbol *s; |
298 | ||
299 | while (*p != NULL) { | |
300 | parent = *p; | |
301 | s = rb_entry(parent, struct symbol, rb_node); | |
302 | if (ip < s->start) | |
303 | p = &(*p)->rb_left; | |
304 | else | |
305 | p = &(*p)->rb_right; | |
306 | } | |
307 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 308 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
309 | } |
310 | ||
aeafcbaf | 311 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
312 | { |
313 | struct rb_node *n; | |
314 | ||
aeafcbaf | 315 | if (symbols == NULL) |
a2928c42 ACM |
316 | return NULL; |
317 | ||
aeafcbaf | 318 | n = symbols->rb_node; |
a2928c42 ACM |
319 | |
320 | while (n) { | |
321 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
322 | ||
323 | if (ip < s->start) | |
324 | n = n->rb_left; | |
325 | else if (ip > s->end) | |
326 | n = n->rb_right; | |
327 | else | |
328 | return s; | |
329 | } | |
330 | ||
331 | return NULL; | |
332 | } | |
333 | ||
8e0cf965 AH |
334 | static struct symbol *symbols__first(struct rb_root *symbols) |
335 | { | |
336 | struct rb_node *n = rb_first(symbols); | |
337 | ||
338 | if (n) | |
339 | return rb_entry(n, struct symbol, rb_node); | |
340 | ||
341 | return NULL; | |
342 | } | |
343 | ||
79406cd7 ACM |
344 | struct symbol_name_rb_node { |
345 | struct rb_node rb_node; | |
346 | struct symbol sym; | |
347 | }; | |
348 | ||
aeafcbaf | 349 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 350 | { |
aeafcbaf | 351 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 352 | struct rb_node *parent = NULL; |
02a9d037 RV |
353 | struct symbol_name_rb_node *symn, *s; |
354 | ||
355 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
356 | |
357 | while (*p != NULL) { | |
358 | parent = *p; | |
359 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
360 | if (strcmp(sym->name, s->sym.name) < 0) | |
361 | p = &(*p)->rb_left; | |
362 | else | |
363 | p = &(*p)->rb_right; | |
364 | } | |
365 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 366 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
367 | } |
368 | ||
aeafcbaf ACM |
369 | static void symbols__sort_by_name(struct rb_root *symbols, |
370 | struct rb_root *source) | |
79406cd7 ACM |
371 | { |
372 | struct rb_node *nd; | |
373 | ||
374 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
375 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 376 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
377 | } |
378 | } | |
379 | ||
aeafcbaf ACM |
380 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
381 | const char *name) | |
79406cd7 ACM |
382 | { |
383 | struct rb_node *n; | |
384 | ||
aeafcbaf | 385 | if (symbols == NULL) |
79406cd7 ACM |
386 | return NULL; |
387 | ||
aeafcbaf | 388 | n = symbols->rb_node; |
79406cd7 ACM |
389 | |
390 | while (n) { | |
391 | struct symbol_name_rb_node *s; | |
392 | int cmp; | |
393 | ||
394 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
395 | cmp = strcmp(name, s->sym.name); | |
396 | ||
397 | if (cmp < 0) | |
398 | n = n->rb_left; | |
399 | else if (cmp > 0) | |
400 | n = n->rb_right; | |
401 | else | |
402 | return &s->sym; | |
403 | } | |
404 | ||
405 | return NULL; | |
406 | } | |
407 | ||
aeafcbaf | 408 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 409 | enum map_type type, u64 addr) |
fcf1203a | 410 | { |
aeafcbaf | 411 | return symbols__find(&dso->symbols[type], addr); |
fcf1203a ACM |
412 | } |
413 | ||
8e0cf965 AH |
414 | struct symbol *dso__first_symbol(struct dso *dso, enum map_type type) |
415 | { | |
416 | return symbols__first(&dso->symbols[type]); | |
417 | } | |
418 | ||
aeafcbaf | 419 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
420 | const char *name) |
421 | { | |
aeafcbaf | 422 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
423 | } |
424 | ||
aeafcbaf | 425 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 426 | { |
aeafcbaf ACM |
427 | dso__set_sorted_by_name(dso, type); |
428 | return symbols__sort_by_name(&dso->symbol_names[type], | |
429 | &dso->symbols[type]); | |
79406cd7 ACM |
430 | } |
431 | ||
aeafcbaf ACM |
432 | size_t dso__fprintf_symbols_by_name(struct dso *dso, |
433 | enum map_type type, FILE *fp) | |
90f18e63 SD |
434 | { |
435 | size_t ret = 0; | |
436 | struct rb_node *nd; | |
437 | struct symbol_name_rb_node *pos; | |
438 | ||
aeafcbaf | 439 | for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { |
90f18e63 SD |
440 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); |
441 | fprintf(fp, "%s\n", pos->sym.name); | |
442 | } | |
443 | ||
444 | return ret; | |
445 | } | |
446 | ||
9e201442 ACM |
447 | int kallsyms__parse(const char *filename, void *arg, |
448 | int (*process_symbol)(void *arg, const char *name, | |
82151520 | 449 | char type, u64 start)) |
a2928c42 | 450 | { |
a2928c42 ACM |
451 | char *line = NULL; |
452 | size_t n; | |
3b01a413 | 453 | int err = -1; |
9e201442 | 454 | FILE *file = fopen(filename, "r"); |
a2928c42 ACM |
455 | |
456 | if (file == NULL) | |
457 | goto out_failure; | |
458 | ||
3b01a413 ACM |
459 | err = 0; |
460 | ||
a2928c42 | 461 | while (!feof(file)) { |
9cffa8d5 | 462 | u64 start; |
a2928c42 ACM |
463 | int line_len, len; |
464 | char symbol_type; | |
2e538c4a | 465 | char *symbol_name; |
a2928c42 ACM |
466 | |
467 | line_len = getline(&line, &n, file); | |
a1645ce1 | 468 | if (line_len < 0 || !line) |
a2928c42 ACM |
469 | break; |
470 | ||
a2928c42 ACM |
471 | line[--line_len] = '\0'; /* \n */ |
472 | ||
a0055ae2 | 473 | len = hex2u64(line, &start); |
a2928c42 ACM |
474 | |
475 | len++; | |
476 | if (len + 2 >= line_len) | |
477 | continue; | |
478 | ||
31877908 | 479 | symbol_type = line[len]; |
3b01a413 ACM |
480 | len += 2; |
481 | symbol_name = line + len; | |
482 | len = line_len - len; | |
682b335a | 483 | |
3b01a413 ACM |
484 | if (len >= KSYM_NAME_LEN) { |
485 | err = -1; | |
682b335a | 486 | break; |
3b01a413 ACM |
487 | } |
488 | ||
3f5a4272 | 489 | err = process_symbol(arg, symbol_name, |
82151520 | 490 | symbol_type, start); |
3f5a4272 AB |
491 | if (err) |
492 | break; | |
2e538c4a ACM |
493 | } |
494 | ||
495 | free(line); | |
496 | fclose(file); | |
682b335a | 497 | return err; |
2e538c4a | 498 | |
2e538c4a ACM |
499 | out_failure: |
500 | return -1; | |
501 | } | |
502 | ||
682b335a ACM |
503 | struct process_kallsyms_args { |
504 | struct map *map; | |
505 | struct dso *dso; | |
506 | }; | |
507 | ||
c408fedf ACM |
508 | static u8 kallsyms2elf_type(char type) |
509 | { | |
510 | if (type == 'W') | |
511 | return STB_WEAK; | |
512 | ||
513 | return isupper(type) ? STB_GLOBAL : STB_LOCAL; | |
514 | } | |
515 | ||
682b335a | 516 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 517 | char type, u64 start) |
682b335a ACM |
518 | { |
519 | struct symbol *sym; | |
520 | struct process_kallsyms_args *a = arg; | |
521 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
522 | ||
523 | if (!symbol_type__is_a(type, a->map->type)) | |
524 | return 0; | |
525 | ||
82151520 CS |
526 | /* |
527 | * module symbols are not sorted so we add all | |
528 | * symbols, setting length to 0, and rely on | |
529 | * symbols__fixup_end() to fix it up. | |
530 | */ | |
531 | sym = symbol__new(start, 0, kallsyms2elf_type(type), name); | |
682b335a ACM |
532 | if (sym == NULL) |
533 | return -ENOMEM; | |
534 | /* | |
535 | * We will pass the symbols to the filter later, in | |
536 | * map__split_kallsyms, when we have split the maps per module | |
537 | */ | |
538 | symbols__insert(root, sym); | |
a1645ce1 | 539 | |
682b335a ACM |
540 | return 0; |
541 | } | |
542 | ||
543 | /* | |
544 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
545 | * so that we can in the next step set the symbol ->end address and then | |
546 | * call kernel_maps__split_kallsyms. | |
547 | */ | |
aeafcbaf | 548 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 549 | struct map *map) |
682b335a | 550 | { |
aeafcbaf | 551 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 552 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
553 | } |
554 | ||
8e0cf965 AH |
555 | static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map, |
556 | symbol_filter_t filter) | |
557 | { | |
558 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
559 | struct map *curr_map; | |
560 | struct symbol *pos; | |
561 | int count = 0, moved = 0; | |
562 | struct rb_root *root = &dso->symbols[map->type]; | |
563 | struct rb_node *next = rb_first(root); | |
564 | ||
565 | while (next) { | |
566 | char *module; | |
567 | ||
568 | pos = rb_entry(next, struct symbol, rb_node); | |
569 | next = rb_next(&pos->rb_node); | |
570 | ||
571 | module = strchr(pos->name, '\t'); | |
572 | if (module) | |
573 | *module = '\0'; | |
574 | ||
575 | curr_map = map_groups__find(kmaps, map->type, pos->start); | |
576 | ||
577 | if (!curr_map || (filter && filter(curr_map, pos))) { | |
578 | rb_erase(&pos->rb_node, root); | |
579 | symbol__delete(pos); | |
580 | } else { | |
581 | pos->start -= curr_map->start - curr_map->pgoff; | |
582 | if (pos->end) | |
583 | pos->end -= curr_map->start - curr_map->pgoff; | |
584 | if (curr_map != map) { | |
585 | rb_erase(&pos->rb_node, root); | |
586 | symbols__insert( | |
587 | &curr_map->dso->symbols[curr_map->type], | |
588 | pos); | |
589 | ++moved; | |
590 | } else { | |
591 | ++count; | |
592 | } | |
593 | } | |
594 | } | |
595 | ||
596 | /* Symbols have been adjusted */ | |
597 | dso->adjust_symbols = 1; | |
598 | ||
599 | return count + moved; | |
600 | } | |
601 | ||
2e538c4a ACM |
602 | /* |
603 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
604 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
605 | * the original ELF section names vmlinux have. | |
606 | */ | |
aeafcbaf | 607 | static int dso__split_kallsyms(struct dso *dso, struct map *map, |
9de89fe7 | 608 | symbol_filter_t filter) |
2e538c4a | 609 | { |
9de89fe7 | 610 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 611 | struct machine *machine = kmaps->machine; |
4e06255f | 612 | struct map *curr_map = map; |
2e538c4a | 613 | struct symbol *pos; |
8a953312 | 614 | int count = 0, moved = 0; |
aeafcbaf | 615 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 616 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
617 | int kernel_range = 0; |
618 | ||
619 | while (next) { | |
620 | char *module; | |
621 | ||
622 | pos = rb_entry(next, struct symbol, rb_node); | |
623 | next = rb_next(&pos->rb_node); | |
624 | ||
625 | module = strchr(pos->name, '\t'); | |
626 | if (module) { | |
75be6cf4 | 627 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
628 | goto discard_symbol; |
629 | ||
2e538c4a ACM |
630 | *module++ = '\0'; |
631 | ||
b7cece76 | 632 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 633 | if (curr_map != map && |
aeafcbaf | 634 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 635 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
636 | /* |
637 | * We assume all symbols of a module are | |
638 | * continuous in * kallsyms, so curr_map | |
639 | * points to a module and all its | |
640 | * symbols are in its kmap. Mark it as | |
641 | * loaded. | |
642 | */ | |
643 | dso__set_loaded(curr_map->dso, | |
644 | curr_map->type); | |
645 | } | |
646 | ||
647 | curr_map = map_groups__find_by_name(kmaps, | |
648 | map->type, module); | |
4e06255f | 649 | if (curr_map == NULL) { |
2f51903b | 650 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 651 | "inconsistency while looking " |
a1645ce1 | 652 | "for \"%s\" module!\n", |
23346f21 | 653 | machine->root_dir, module); |
a1645ce1 ZY |
654 | curr_map = map; |
655 | goto discard_symbol; | |
af427bf5 | 656 | } |
b7cece76 | 657 | |
a1645ce1 | 658 | if (curr_map->dso->loaded && |
23346f21 | 659 | !machine__is_default_guest(machine)) |
b7cece76 | 660 | goto discard_symbol; |
af427bf5 | 661 | } |
2e538c4a ACM |
662 | /* |
663 | * So that we look just like we get from .ko files, | |
664 | * i.e. not prelinked, relative to map->start. | |
665 | */ | |
4e06255f ACM |
666 | pos->start = curr_map->map_ip(curr_map, pos->start); |
667 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
668 | } else if (curr_map != map) { | |
2e538c4a | 669 | char dso_name[PATH_MAX]; |
aeafcbaf | 670 | struct dso *ndso; |
2e538c4a | 671 | |
8a953312 ACM |
672 | if (count == 0) { |
673 | curr_map = map; | |
674 | goto filter_symbol; | |
675 | } | |
676 | ||
aeafcbaf | 677 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
678 | snprintf(dso_name, sizeof(dso_name), |
679 | "[guest.kernel].%d", | |
680 | kernel_range++); | |
681 | else | |
682 | snprintf(dso_name, sizeof(dso_name), | |
683 | "[kernel].%d", | |
684 | kernel_range++); | |
2e538c4a | 685 | |
aeafcbaf ACM |
686 | ndso = dso__new(dso_name); |
687 | if (ndso == NULL) | |
2e538c4a ACM |
688 | return -1; |
689 | ||
aeafcbaf | 690 | ndso->kernel = dso->kernel; |
a1645ce1 | 691 | |
aeafcbaf | 692 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 693 | if (curr_map == NULL) { |
aeafcbaf | 694 | dso__delete(ndso); |
2e538c4a ACM |
695 | return -1; |
696 | } | |
a2928c42 | 697 | |
4e06255f | 698 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 699 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
700 | ++kernel_range; |
701 | } | |
8a953312 | 702 | filter_symbol: |
4e06255f | 703 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 704 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 705 | symbol__delete(pos); |
2e538c4a | 706 | } else { |
4e06255f ACM |
707 | if (curr_map != map) { |
708 | rb_erase(&pos->rb_node, root); | |
709 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
710 | ++moved; |
711 | } else | |
712 | ++count; | |
9974f496 | 713 | } |
a2928c42 ACM |
714 | } |
715 | ||
a1645ce1 | 716 | if (curr_map != map && |
aeafcbaf | 717 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 718 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
719 | dso__set_loaded(curr_map->dso, curr_map->type); |
720 | } | |
721 | ||
8a953312 | 722 | return count + moved; |
2e538c4a | 723 | } |
a2928c42 | 724 | |
3f067dca ACM |
725 | bool symbol__restricted_filename(const char *filename, |
726 | const char *restricted_filename) | |
ec80fde7 ACM |
727 | { |
728 | bool restricted = false; | |
729 | ||
730 | if (symbol_conf.kptr_restrict) { | |
731 | char *r = realpath(filename, NULL); | |
732 | ||
733 | if (r != NULL) { | |
734 | restricted = strcmp(r, restricted_filename) == 0; | |
735 | free(r); | |
736 | return restricted; | |
737 | } | |
738 | } | |
739 | ||
740 | return restricted; | |
741 | } | |
742 | ||
8e0cf965 AH |
743 | struct kcore_mapfn_data { |
744 | struct dso *dso; | |
745 | enum map_type type; | |
746 | struct list_head maps; | |
747 | }; | |
748 | ||
749 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
750 | { | |
751 | struct kcore_mapfn_data *md = data; | |
752 | struct map *map; | |
753 | ||
754 | map = map__new2(start, md->dso, md->type); | |
755 | if (map == NULL) | |
756 | return -ENOMEM; | |
757 | ||
758 | map->end = map->start + len; | |
759 | map->pgoff = pgoff; | |
760 | ||
761 | list_add(&map->node, &md->maps); | |
762 | ||
763 | return 0; | |
764 | } | |
765 | ||
766 | /* | |
767 | * If kallsyms is referenced by name then we look for kcore in the same | |
768 | * directory. | |
769 | */ | |
770 | static bool kcore_filename_from_kallsyms_filename(char *kcore_filename, | |
771 | const char *kallsyms_filename) | |
772 | { | |
773 | char *name; | |
774 | ||
775 | strcpy(kcore_filename, kallsyms_filename); | |
776 | name = strrchr(kcore_filename, '/'); | |
777 | if (!name) | |
778 | return false; | |
779 | ||
780 | if (!strcmp(name, "/kallsyms")) { | |
781 | strcpy(name, "/kcore"); | |
782 | return true; | |
783 | } | |
784 | ||
785 | return false; | |
786 | } | |
787 | ||
788 | static int dso__load_kcore(struct dso *dso, struct map *map, | |
789 | const char *kallsyms_filename) | |
790 | { | |
791 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
792 | struct machine *machine = kmaps->machine; | |
793 | struct kcore_mapfn_data md; | |
794 | struct map *old_map, *new_map, *replacement_map = NULL; | |
795 | bool is_64_bit; | |
796 | int err, fd; | |
797 | char kcore_filename[PATH_MAX]; | |
798 | struct symbol *sym; | |
799 | ||
800 | /* This function requires that the map is the kernel map */ | |
801 | if (map != machine->vmlinux_maps[map->type]) | |
802 | return -EINVAL; | |
803 | ||
804 | if (!kcore_filename_from_kallsyms_filename(kcore_filename, | |
805 | kallsyms_filename)) | |
806 | return -EINVAL; | |
807 | ||
808 | md.dso = dso; | |
809 | md.type = map->type; | |
810 | INIT_LIST_HEAD(&md.maps); | |
811 | ||
812 | fd = open(kcore_filename, O_RDONLY); | |
813 | if (fd < 0) | |
814 | return -EINVAL; | |
815 | ||
816 | /* Read new maps into temporary lists */ | |
817 | err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md, | |
818 | &is_64_bit); | |
819 | if (err) | |
820 | goto out_err; | |
821 | ||
822 | if (list_empty(&md.maps)) { | |
823 | err = -EINVAL; | |
824 | goto out_err; | |
825 | } | |
826 | ||
827 | /* Remove old maps */ | |
828 | old_map = map_groups__first(kmaps, map->type); | |
829 | while (old_map) { | |
830 | struct map *next = map_groups__next(old_map); | |
831 | ||
832 | if (old_map != map) | |
833 | map_groups__remove(kmaps, old_map); | |
834 | old_map = next; | |
835 | } | |
836 | ||
837 | /* Find the kernel map using the first symbol */ | |
838 | sym = dso__first_symbol(dso, map->type); | |
839 | list_for_each_entry(new_map, &md.maps, node) { | |
840 | if (sym && sym->start >= new_map->start && | |
841 | sym->start < new_map->end) { | |
842 | replacement_map = new_map; | |
843 | break; | |
844 | } | |
845 | } | |
846 | ||
847 | if (!replacement_map) | |
848 | replacement_map = list_entry(md.maps.next, struct map, node); | |
849 | ||
850 | /* Add new maps */ | |
851 | while (!list_empty(&md.maps)) { | |
852 | new_map = list_entry(md.maps.next, struct map, node); | |
853 | list_del(&new_map->node); | |
854 | if (new_map == replacement_map) { | |
855 | map->start = new_map->start; | |
856 | map->end = new_map->end; | |
857 | map->pgoff = new_map->pgoff; | |
858 | map->map_ip = new_map->map_ip; | |
859 | map->unmap_ip = new_map->unmap_ip; | |
860 | map__delete(new_map); | |
861 | /* Ensure maps are correctly ordered */ | |
862 | map_groups__remove(kmaps, map); | |
863 | map_groups__insert(kmaps, map); | |
864 | } else { | |
865 | map_groups__insert(kmaps, new_map); | |
866 | } | |
867 | } | |
868 | ||
869 | /* | |
870 | * Set the data type and long name so that kcore can be read via | |
871 | * dso__data_read_addr(). | |
872 | */ | |
873 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
874 | dso->data_type = DSO_BINARY_TYPE__GUEST_KCORE; | |
875 | else | |
876 | dso->data_type = DSO_BINARY_TYPE__KCORE; | |
877 | dso__set_long_name(dso, strdup(kcore_filename)); | |
878 | ||
879 | close(fd); | |
880 | ||
881 | if (map->type == MAP__FUNCTION) | |
882 | pr_debug("Using %s for kernel object code\n", kcore_filename); | |
883 | else | |
884 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
885 | ||
886 | return 0; | |
887 | ||
888 | out_err: | |
889 | while (!list_empty(&md.maps)) { | |
890 | map = list_entry(md.maps.next, struct map, node); | |
891 | list_del(&map->node); | |
892 | map__delete(map); | |
893 | } | |
894 | close(fd); | |
895 | return -EINVAL; | |
896 | } | |
897 | ||
aeafcbaf | 898 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 899 | struct map *map, symbol_filter_t filter) |
2e538c4a | 900 | { |
ec80fde7 ACM |
901 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
902 | return -1; | |
903 | ||
aeafcbaf | 904 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
905 | return -1; |
906 | ||
694bf407 | 907 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
908 | symbols__fixup_end(&dso->symbols[map->type]); |
909 | ||
aeafcbaf | 910 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 911 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 912 | else |
44f24cb3 | 913 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 914 | |
8e0cf965 AH |
915 | if (!dso__load_kcore(dso, map, filename)) |
916 | return dso__split_kallsyms_for_kcore(dso, map, filter); | |
917 | else | |
918 | return dso__split_kallsyms(dso, map, filter); | |
af427bf5 ACM |
919 | } |
920 | ||
aeafcbaf | 921 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 922 | symbol_filter_t filter) |
80d496be PE |
923 | { |
924 | char *line = NULL; | |
925 | size_t n; | |
926 | FILE *file; | |
927 | int nr_syms = 0; | |
928 | ||
aeafcbaf | 929 | file = fopen(dso->long_name, "r"); |
80d496be PE |
930 | if (file == NULL) |
931 | goto out_failure; | |
932 | ||
933 | while (!feof(file)) { | |
9cffa8d5 | 934 | u64 start, size; |
80d496be PE |
935 | struct symbol *sym; |
936 | int line_len, len; | |
937 | ||
938 | line_len = getline(&line, &n, file); | |
939 | if (line_len < 0) | |
940 | break; | |
941 | ||
942 | if (!line) | |
943 | goto out_failure; | |
944 | ||
945 | line[--line_len] = '\0'; /* \n */ | |
946 | ||
947 | len = hex2u64(line, &start); | |
948 | ||
949 | len++; | |
950 | if (len + 2 >= line_len) | |
951 | continue; | |
952 | ||
953 | len += hex2u64(line + len, &size); | |
954 | ||
955 | len++; | |
956 | if (len + 2 >= line_len) | |
957 | continue; | |
958 | ||
c408fedf | 959 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
960 | |
961 | if (sym == NULL) | |
962 | goto out_delete_line; | |
963 | ||
439d473b | 964 | if (filter && filter(map, sym)) |
00a192b3 | 965 | symbol__delete(sym); |
80d496be | 966 | else { |
aeafcbaf | 967 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
968 | nr_syms++; |
969 | } | |
970 | } | |
971 | ||
972 | free(line); | |
973 | fclose(file); | |
974 | ||
975 | return nr_syms; | |
976 | ||
977 | out_delete_line: | |
978 | free(line); | |
979 | out_failure: | |
980 | return -1; | |
981 | } | |
982 | ||
aeafcbaf | 983 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 984 | { |
c338aee8 | 985 | char *name; |
a2928c42 | 986 | int ret = -1; |
44f24cb3 | 987 | u_int i; |
23346f21 | 988 | struct machine *machine; |
44f24cb3 | 989 | char *root_dir = (char *) ""; |
3aafe5ae CS |
990 | int ss_pos = 0; |
991 | struct symsrc ss_[2]; | |
992 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
a2928c42 | 993 | |
aeafcbaf | 994 | dso__set_loaded(dso, map->type); |
66bd8424 | 995 | |
aeafcbaf ACM |
996 | if (dso->kernel == DSO_TYPE_KERNEL) |
997 | return dso__load_kernel_sym(dso, map, filter); | |
998 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
999 | return dso__load_guest_kernel_sym(dso, map, filter); | |
a1645ce1 | 1000 | |
23346f21 ACM |
1001 | if (map->groups && map->groups->machine) |
1002 | machine = map->groups->machine; | |
a1645ce1 | 1003 | else |
23346f21 | 1004 | machine = NULL; |
c338aee8 | 1005 | |
aeafcbaf | 1006 | dso->adjust_symbols = 0; |
f5812a7a | 1007 | |
aeafcbaf | 1008 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1009 | struct stat st; |
1010 | ||
e9b52ef2 | 1011 | if (lstat(dso->name, &st) < 0) |
981c1252 PE |
1012 | return -1; |
1013 | ||
1014 | if (st.st_uid && (st.st_uid != geteuid())) { | |
1015 | pr_warning("File %s not owned by current user or root, " | |
1016 | "ignoring it.\n", dso->name); | |
1017 | return -1; | |
1018 | } | |
1019 | ||
aeafcbaf | 1020 | ret = dso__load_perf_map(dso, map, filter); |
44f24cb3 JO |
1021 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1022 | DSO_BINARY_TYPE__NOT_FOUND; | |
94cb9e38 ACM |
1023 | return ret; |
1024 | } | |
1025 | ||
44f24cb3 JO |
1026 | if (machine) |
1027 | root_dir = machine->root_dir; | |
1028 | ||
164c800e DA |
1029 | name = malloc(PATH_MAX); |
1030 | if (!name) | |
1031 | return -1; | |
1032 | ||
6da80ce8 | 1033 | /* Iterate over candidate debug images. |
3aafe5ae CS |
1034 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1035 | * and/or opd section) for processing. | |
6da80ce8 | 1036 | */ |
44f24cb3 | 1037 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1038 | struct symsrc *ss = &ss_[ss_pos]; |
1039 | bool next_slot = false; | |
6da80ce8 | 1040 | |
005f9294 | 1041 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1042 | |
005f9294 | 1043 | if (dso__binary_type_file(dso, symtab_type, |
44f24cb3 JO |
1044 | root_dir, name, PATH_MAX)) |
1045 | continue; | |
6da80ce8 DM |
1046 | |
1047 | /* Name is now the name of the next image to try */ | |
3aafe5ae | 1048 | if (symsrc__init(ss, dso, name, symtab_type) < 0) |
6da80ce8 | 1049 | continue; |
a2928c42 | 1050 | |
3aafe5ae CS |
1051 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1052 | syms_ss = ss; | |
1053 | next_slot = true; | |
d26cd12b CS |
1054 | } |
1055 | ||
3aafe5ae CS |
1056 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1057 | runtime_ss = ss; | |
1058 | next_slot = true; | |
a44f605b | 1059 | } |
a2928c42 | 1060 | |
3aafe5ae CS |
1061 | if (next_slot) { |
1062 | ss_pos++; | |
33ff581e | 1063 | |
3aafe5ae CS |
1064 | if (syms_ss && runtime_ss) |
1065 | break; | |
6da80ce8 | 1066 | } |
3aafe5ae | 1067 | |
a25e46c4 | 1068 | } |
6da80ce8 | 1069 | |
3aafe5ae CS |
1070 | if (!runtime_ss && !syms_ss) |
1071 | goto out_free; | |
1072 | ||
1073 | if (runtime_ss && !syms_ss) { | |
1074 | syms_ss = runtime_ss; | |
1075 | } | |
1076 | ||
1077 | /* We'll have to hope for the best */ | |
1078 | if (!runtime_ss && syms_ss) | |
1079 | runtime_ss = syms_ss; | |
1080 | ||
0131c4ec AH |
1081 | if (syms_ss) { |
1082 | int km; | |
1083 | ||
1084 | km = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
1085 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
1086 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, km); | |
1087 | } else { | |
3aafe5ae | 1088 | ret = -1; |
0131c4ec | 1089 | } |
3aafe5ae | 1090 | |
f47b58b7 | 1091 | if (ret > 0) { |
3aafe5ae CS |
1092 | int nr_plt; |
1093 | ||
1094 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map, filter); | |
1095 | if (nr_plt > 0) | |
1096 | ret += nr_plt; | |
60e4b10c ACM |
1097 | } |
1098 | ||
3aafe5ae CS |
1099 | for (; ss_pos > 0; ss_pos--) |
1100 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1101 | out_free: | |
a2928c42 | 1102 | free(name); |
aeafcbaf | 1103 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
1340e6bb | 1104 | return 0; |
a2928c42 ACM |
1105 | return ret; |
1106 | } | |
1107 | ||
aeafcbaf | 1108 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1109 | enum map_type type, const char *name) |
439d473b ACM |
1110 | { |
1111 | struct rb_node *nd; | |
1112 | ||
aeafcbaf | 1113 | for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1114 | struct map *map = rb_entry(nd, struct map, rb_node); |
1115 | ||
b7cece76 | 1116 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1117 | return map; |
1118 | } | |
1119 | ||
1120 | return NULL; | |
1121 | } | |
1122 | ||
aeafcbaf | 1123 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
fd930ff9 | 1124 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1125 | { |
b68e2f91 CS |
1126 | int err = -1; |
1127 | struct symsrc ss; | |
ec5761ea | 1128 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1129 | enum dso_binary_type symtab_type; |
a2928c42 | 1130 | |
5698d2c9 NK |
1131 | if (vmlinux[0] == '/') |
1132 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1133 | else | |
1134 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s", | |
1135 | symbol_conf.symfs, vmlinux); | |
a2928c42 | 1136 | |
21ea4539 | 1137 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1138 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1139 | else |
005f9294 | 1140 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1141 | |
005f9294 | 1142 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1143 | return -1; |
1144 | ||
261360b6 | 1145 | err = dso__load_sym(dso, map, &ss, &ss, filter, 0); |
b68e2f91 | 1146 | symsrc__destroy(&ss); |
a2928c42 | 1147 | |
515850e4 | 1148 | if (err > 0) { |
39b12f78 AH |
1149 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
1150 | dso->data_type = DSO_BINARY_TYPE__GUEST_VMLINUX; | |
1151 | else | |
1152 | dso->data_type = DSO_BINARY_TYPE__VMLINUX; | |
515850e4 CS |
1153 | dso__set_long_name(dso, (char *)vmlinux); |
1154 | dso__set_loaded(dso, map->type); | |
ec5761ea | 1155 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1156 | } |
3846df2e | 1157 | |
a2928c42 ACM |
1158 | return err; |
1159 | } | |
1160 | ||
aeafcbaf | 1161 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 1162 | symbol_filter_t filter) |
a19afe46 ACM |
1163 | { |
1164 | int i, err = 0; | |
5ad90e4e | 1165 | char *filename; |
a19afe46 ACM |
1166 | |
1167 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
1168 | vmlinux_path__nr_entries + 1); |
1169 | ||
aeafcbaf | 1170 | filename = dso__build_id_filename(dso, NULL, 0); |
5ad90e4e | 1171 | if (filename != NULL) { |
aeafcbaf | 1172 | err = dso__load_vmlinux(dso, map, filename, filter); |
b7c14a0b DA |
1173 | if (err > 0) { |
1174 | dso->lname_alloc = 1; | |
5ad90e4e | 1175 | goto out; |
b7c14a0b | 1176 | } |
5ad90e4e ACM |
1177 | free(filename); |
1178 | } | |
a19afe46 ACM |
1179 | |
1180 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
aeafcbaf | 1181 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], filter); |
a19afe46 | 1182 | if (err > 0) { |
aeafcbaf | 1183 | dso__set_long_name(dso, strdup(vmlinux_path[i])); |
b7c14a0b | 1184 | dso->lname_alloc = 1; |
a19afe46 ACM |
1185 | break; |
1186 | } | |
1187 | } | |
5ad90e4e | 1188 | out: |
a19afe46 ACM |
1189 | return err; |
1190 | } | |
1191 | ||
aeafcbaf | 1192 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 1193 | symbol_filter_t filter) |
a827c875 | 1194 | { |
cc612d81 | 1195 | int err; |
9e201442 ACM |
1196 | const char *kallsyms_filename = NULL; |
1197 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1198 | /* |
b226a5a7 DA |
1199 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1200 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1201 | * |
1202 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1203 | * build-id, or if the user specifies the wrong path to the right | |
1204 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1205 | * x86_86 one, on the machine where analysis is being performed, say), | |
1206 | * or worse, /proc/kallsyms. | |
1207 | * | |
1208 | * If the specified file _has_ a build-id and there is a build-id | |
1209 | * section in the perf.data file, we will still do the expected | |
1210 | * validation in dso__load_vmlinux and will bail out if they don't | |
1211 | * match. | |
1212 | */ | |
b226a5a7 DA |
1213 | if (symbol_conf.kallsyms_name != NULL) { |
1214 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1215 | goto do_kallsyms; | |
1216 | } | |
1217 | ||
fc2be696 | 1218 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
aeafcbaf | 1219 | err = dso__load_vmlinux(dso, map, |
dc8d6ab2 | 1220 | symbol_conf.vmlinux_name, filter); |
e7dadc00 | 1221 | if (err > 0) { |
aeafcbaf | 1222 | dso__set_long_name(dso, |
e7dadc00 | 1223 | strdup(symbol_conf.vmlinux_name)); |
b7c14a0b | 1224 | dso->lname_alloc = 1; |
39b12f78 | 1225 | return err; |
e7dadc00 ACM |
1226 | } |
1227 | return err; | |
dc8d6ab2 | 1228 | } |
cc612d81 | 1229 | |
fc2be696 | 1230 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
aeafcbaf | 1231 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 | 1232 | if (err > 0) |
39b12f78 | 1233 | return err; |
cc612d81 ACM |
1234 | } |
1235 | ||
ec5761ea DA |
1236 | /* do not try local files if a symfs was given */ |
1237 | if (symbol_conf.symfs[0] != 0) | |
1238 | return -1; | |
1239 | ||
b7cece76 ACM |
1240 | /* |
1241 | * Say the kernel DSO was created when processing the build-id header table, | |
1242 | * we have a build-id, so check if it is the same as the running kernel, | |
1243 | * using it if it is. | |
1244 | */ | |
aeafcbaf | 1245 | if (dso->has_build_id) { |
b7cece76 | 1246 | u8 kallsyms_build_id[BUILD_ID_SIZE]; |
9e201442 | 1247 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
1248 | |
1249 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 1250 | sizeof(kallsyms_build_id)) == 0) { |
aeafcbaf | 1251 | if (dso__build_id_equal(dso, kallsyms_build_id)) { |
9e201442 | 1252 | kallsyms_filename = "/proc/kallsyms"; |
8d0591f6 | 1253 | goto do_kallsyms; |
9e201442 | 1254 | } |
8d0591f6 | 1255 | } |
dc8d6ab2 ACM |
1256 | /* |
1257 | * Now look if we have it on the build-id cache in | |
1258 | * $HOME/.debug/[kernel.kallsyms]. | |
1259 | */ | |
aeafcbaf | 1260 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), |
9e201442 ACM |
1261 | sbuild_id); |
1262 | ||
1263 | if (asprintf(&kallsyms_allocated_filename, | |
1264 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
1265 | getenv("HOME"), sbuild_id) == -1) { |
1266 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 1267 | return -1; |
3846df2e | 1268 | } |
dc8d6ab2 | 1269 | |
19fc2ded ACM |
1270 | kallsyms_filename = kallsyms_allocated_filename; |
1271 | ||
dc8d6ab2 | 1272 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
1273 | pr_err("No kallsyms or vmlinux with build-id %s " |
1274 | "was found\n", sbuild_id); | |
9e201442 | 1275 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 1276 | return -1; |
9e201442 | 1277 | } |
dc8d6ab2 ACM |
1278 | } else { |
1279 | /* | |
1280 | * Last resort, if we don't have a build-id and couldn't find | |
1281 | * any vmlinux file, try the running kernel kallsyms table. | |
1282 | */ | |
9e201442 | 1283 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 1284 | } |
439d473b | 1285 | |
cc612d81 | 1286 | do_kallsyms: |
aeafcbaf | 1287 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
1288 | if (err > 0) |
1289 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1290 | free(kallsyms_allocated_filename); |
439d473b | 1291 | |
8e0cf965 | 1292 | if (err > 0 && !dso__is_kcore(dso)) { |
0a0317b4 | 1293 | dso__set_long_name(dso, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
1294 | map__fixup_start(map); |
1295 | map__fixup_end(map); | |
439d473b | 1296 | } |
94cb9e38 | 1297 | |
a827c875 ACM |
1298 | return err; |
1299 | } | |
1300 | ||
aeafcbaf ACM |
1301 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
1302 | symbol_filter_t filter) | |
a1645ce1 ZY |
1303 | { |
1304 | int err; | |
1305 | const char *kallsyms_filename = NULL; | |
23346f21 | 1306 | struct machine *machine; |
a1645ce1 ZY |
1307 | char path[PATH_MAX]; |
1308 | ||
1309 | if (!map->groups) { | |
1310 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1311 | return -1; | |
1312 | } | |
23346f21 | 1313 | machine = map->groups->machine; |
a1645ce1 | 1314 | |
23346f21 | 1315 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1316 | /* |
1317 | * if the user specified a vmlinux filename, use it and only | |
1318 | * it, reporting errors to the user if it cannot be used. | |
1319 | * Or use file guest_kallsyms inputted by user on commandline | |
1320 | */ | |
1321 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1322 | err = dso__load_vmlinux(dso, map, |
a1645ce1 | 1323 | symbol_conf.default_guest_vmlinux_name, filter); |
39b12f78 | 1324 | return err; |
a1645ce1 ZY |
1325 | } |
1326 | ||
1327 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1328 | if (!kallsyms_filename) | |
1329 | return -1; | |
1330 | } else { | |
23346f21 | 1331 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1332 | kallsyms_filename = path; |
1333 | } | |
1334 | ||
aeafcbaf | 1335 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
8e0cf965 | 1336 | if (err > 0) |
39b12f78 | 1337 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 1338 | if (err > 0 && !dso__is_kcore(dso)) { |
39b12f78 AH |
1339 | machine__mmap_name(machine, path, sizeof(path)); |
1340 | dso__set_long_name(dso, strdup(path)); | |
a1645ce1 ZY |
1341 | map__fixup_start(map); |
1342 | map__fixup_end(map); | |
1343 | } | |
1344 | ||
1345 | return err; | |
1346 | } | |
cd84c2ac | 1347 | |
cc612d81 ACM |
1348 | static void vmlinux_path__exit(void) |
1349 | { | |
1350 | while (--vmlinux_path__nr_entries >= 0) { | |
1351 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
1352 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
1353 | } | |
1354 | ||
1355 | free(vmlinux_path); | |
1356 | vmlinux_path = NULL; | |
1357 | } | |
1358 | ||
1359 | static int vmlinux_path__init(void) | |
1360 | { | |
1361 | struct utsname uts; | |
1362 | char bf[PATH_MAX]; | |
1363 | ||
cc612d81 ACM |
1364 | vmlinux_path = malloc(sizeof(char *) * 5); |
1365 | if (vmlinux_path == NULL) | |
1366 | return -1; | |
1367 | ||
1368 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
1369 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1370 | goto out_fail; | |
1371 | ++vmlinux_path__nr_entries; | |
1372 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
1373 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1374 | goto out_fail; | |
1375 | ++vmlinux_path__nr_entries; | |
ec5761ea DA |
1376 | |
1377 | /* only try running kernel version if no symfs was given */ | |
1378 | if (symbol_conf.symfs[0] != 0) | |
1379 | return 0; | |
1380 | ||
1381 | if (uname(&uts) < 0) | |
1382 | return -1; | |
1383 | ||
cc612d81 ACM |
1384 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); |
1385 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1386 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1387 | goto out_fail; | |
1388 | ++vmlinux_path__nr_entries; | |
1389 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
1390 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1391 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1392 | goto out_fail; | |
1393 | ++vmlinux_path__nr_entries; | |
1394 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
1395 | uts.release); | |
1396 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1397 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1398 | goto out_fail; | |
1399 | ++vmlinux_path__nr_entries; | |
1400 | ||
1401 | return 0; | |
1402 | ||
1403 | out_fail: | |
1404 | vmlinux_path__exit(); | |
1405 | return -1; | |
1406 | } | |
1407 | ||
655000e7 ACM |
1408 | static int setup_list(struct strlist **list, const char *list_str, |
1409 | const char *list_name) | |
1410 | { | |
1411 | if (list_str == NULL) | |
1412 | return 0; | |
1413 | ||
1414 | *list = strlist__new(true, list_str); | |
1415 | if (!*list) { | |
1416 | pr_err("problems parsing %s list\n", list_name); | |
1417 | return -1; | |
1418 | } | |
1419 | return 0; | |
1420 | } | |
1421 | ||
ec80fde7 ACM |
1422 | static bool symbol__read_kptr_restrict(void) |
1423 | { | |
1424 | bool value = false; | |
1425 | ||
1426 | if (geteuid() != 0) { | |
1427 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
1428 | if (fp != NULL) { | |
1429 | char line[8]; | |
1430 | ||
1431 | if (fgets(line, sizeof(line), fp) != NULL) | |
1432 | value = atoi(line) != 0; | |
1433 | ||
1434 | fclose(fp); | |
1435 | } | |
1436 | } | |
1437 | ||
1438 | return value; | |
1439 | } | |
1440 | ||
75be6cf4 | 1441 | int symbol__init(void) |
2446042c | 1442 | { |
ec5761ea DA |
1443 | const char *symfs; |
1444 | ||
85e00b55 JZ |
1445 | if (symbol_conf.initialized) |
1446 | return 0; | |
1447 | ||
9ac3e487 | 1448 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 1449 | |
166ccc9c NK |
1450 | symbol__elf_init(); |
1451 | ||
75be6cf4 ACM |
1452 | if (symbol_conf.sort_by_name) |
1453 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
1454 | sizeof(struct symbol)); | |
b32d133a | 1455 | |
75be6cf4 | 1456 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
1457 | return -1; |
1458 | ||
c410a338 ACM |
1459 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
1460 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
1461 | return -1; | |
1462 | } | |
1463 | ||
655000e7 ACM |
1464 | if (setup_list(&symbol_conf.dso_list, |
1465 | symbol_conf.dso_list_str, "dso") < 0) | |
1466 | return -1; | |
1467 | ||
1468 | if (setup_list(&symbol_conf.comm_list, | |
1469 | symbol_conf.comm_list_str, "comm") < 0) | |
1470 | goto out_free_dso_list; | |
1471 | ||
1472 | if (setup_list(&symbol_conf.sym_list, | |
1473 | symbol_conf.sym_list_str, "symbol") < 0) | |
1474 | goto out_free_comm_list; | |
1475 | ||
ec5761ea DA |
1476 | /* |
1477 | * A path to symbols of "/" is identical to "" | |
1478 | * reset here for simplicity. | |
1479 | */ | |
1480 | symfs = realpath(symbol_conf.symfs, NULL); | |
1481 | if (symfs == NULL) | |
1482 | symfs = symbol_conf.symfs; | |
1483 | if (strcmp(symfs, "/") == 0) | |
1484 | symbol_conf.symfs = ""; | |
1485 | if (symfs != symbol_conf.symfs) | |
1486 | free((void *)symfs); | |
1487 | ||
ec80fde7 ACM |
1488 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
1489 | ||
85e00b55 | 1490 | symbol_conf.initialized = true; |
4aa65636 | 1491 | return 0; |
655000e7 | 1492 | |
655000e7 ACM |
1493 | out_free_comm_list: |
1494 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
1495 | out_free_dso_list: |
1496 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 1497 | return -1; |
4aa65636 ACM |
1498 | } |
1499 | ||
d65a458b ACM |
1500 | void symbol__exit(void) |
1501 | { | |
85e00b55 JZ |
1502 | if (!symbol_conf.initialized) |
1503 | return; | |
d65a458b ACM |
1504 | strlist__delete(symbol_conf.sym_list); |
1505 | strlist__delete(symbol_conf.dso_list); | |
1506 | strlist__delete(symbol_conf.comm_list); | |
1507 | vmlinux_path__exit(); | |
1508 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 1509 | symbol_conf.initialized = false; |
d65a458b | 1510 | } |