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" |
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 | ||
316d70d6 AH |
503 | int modules__parse(const char *filename, void *arg, |
504 | int (*process_module)(void *arg, const char *name, | |
505 | u64 start)) | |
506 | { | |
507 | char *line = NULL; | |
508 | size_t n; | |
509 | FILE *file; | |
510 | int err = 0; | |
511 | ||
512 | file = fopen(filename, "r"); | |
513 | if (file == NULL) | |
514 | return -1; | |
515 | ||
516 | while (1) { | |
517 | char name[PATH_MAX]; | |
518 | u64 start; | |
519 | char *sep; | |
520 | ssize_t line_len; | |
521 | ||
522 | line_len = getline(&line, &n, file); | |
523 | if (line_len < 0) { | |
524 | if (feof(file)) | |
525 | break; | |
526 | err = -1; | |
527 | goto out; | |
528 | } | |
529 | ||
530 | if (!line) { | |
531 | err = -1; | |
532 | goto out; | |
533 | } | |
534 | ||
535 | line[--line_len] = '\0'; /* \n */ | |
536 | ||
537 | sep = strrchr(line, 'x'); | |
538 | if (sep == NULL) | |
539 | continue; | |
540 | ||
541 | hex2u64(sep + 1, &start); | |
542 | ||
543 | sep = strchr(line, ' '); | |
544 | if (sep == NULL) | |
545 | continue; | |
546 | ||
547 | *sep = '\0'; | |
548 | ||
549 | scnprintf(name, sizeof(name), "[%s]", line); | |
550 | ||
551 | err = process_module(arg, name, start); | |
552 | if (err) | |
553 | break; | |
554 | } | |
555 | out: | |
556 | free(line); | |
557 | fclose(file); | |
558 | return err; | |
559 | } | |
560 | ||
682b335a ACM |
561 | struct process_kallsyms_args { |
562 | struct map *map; | |
563 | struct dso *dso; | |
564 | }; | |
565 | ||
c408fedf ACM |
566 | static u8 kallsyms2elf_type(char type) |
567 | { | |
568 | if (type == 'W') | |
569 | return STB_WEAK; | |
570 | ||
571 | return isupper(type) ? STB_GLOBAL : STB_LOCAL; | |
572 | } | |
573 | ||
682b335a | 574 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 575 | char type, u64 start) |
682b335a ACM |
576 | { |
577 | struct symbol *sym; | |
578 | struct process_kallsyms_args *a = arg; | |
579 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
580 | ||
581 | if (!symbol_type__is_a(type, a->map->type)) | |
582 | return 0; | |
583 | ||
82151520 CS |
584 | /* |
585 | * module symbols are not sorted so we add all | |
586 | * symbols, setting length to 0, and rely on | |
587 | * symbols__fixup_end() to fix it up. | |
588 | */ | |
589 | sym = symbol__new(start, 0, kallsyms2elf_type(type), name); | |
682b335a ACM |
590 | if (sym == NULL) |
591 | return -ENOMEM; | |
592 | /* | |
593 | * We will pass the symbols to the filter later, in | |
594 | * map__split_kallsyms, when we have split the maps per module | |
595 | */ | |
596 | symbols__insert(root, sym); | |
a1645ce1 | 597 | |
682b335a ACM |
598 | return 0; |
599 | } | |
600 | ||
601 | /* | |
602 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
603 | * so that we can in the next step set the symbol ->end address and then | |
604 | * call kernel_maps__split_kallsyms. | |
605 | */ | |
aeafcbaf | 606 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 607 | struct map *map) |
682b335a | 608 | { |
aeafcbaf | 609 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 610 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
611 | } |
612 | ||
8e0cf965 AH |
613 | static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map, |
614 | symbol_filter_t filter) | |
615 | { | |
616 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
617 | struct map *curr_map; | |
618 | struct symbol *pos; | |
619 | int count = 0, moved = 0; | |
620 | struct rb_root *root = &dso->symbols[map->type]; | |
621 | struct rb_node *next = rb_first(root); | |
622 | ||
623 | while (next) { | |
624 | char *module; | |
625 | ||
626 | pos = rb_entry(next, struct symbol, rb_node); | |
627 | next = rb_next(&pos->rb_node); | |
628 | ||
629 | module = strchr(pos->name, '\t'); | |
630 | if (module) | |
631 | *module = '\0'; | |
632 | ||
633 | curr_map = map_groups__find(kmaps, map->type, pos->start); | |
634 | ||
635 | if (!curr_map || (filter && filter(curr_map, pos))) { | |
636 | rb_erase(&pos->rb_node, root); | |
637 | symbol__delete(pos); | |
638 | } else { | |
639 | pos->start -= curr_map->start - curr_map->pgoff; | |
640 | if (pos->end) | |
641 | pos->end -= curr_map->start - curr_map->pgoff; | |
642 | if (curr_map != map) { | |
643 | rb_erase(&pos->rb_node, root); | |
644 | symbols__insert( | |
645 | &curr_map->dso->symbols[curr_map->type], | |
646 | pos); | |
647 | ++moved; | |
648 | } else { | |
649 | ++count; | |
650 | } | |
651 | } | |
652 | } | |
653 | ||
654 | /* Symbols have been adjusted */ | |
655 | dso->adjust_symbols = 1; | |
656 | ||
657 | return count + moved; | |
658 | } | |
659 | ||
2e538c4a ACM |
660 | /* |
661 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
662 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
663 | * the original ELF section names vmlinux have. | |
664 | */ | |
aeafcbaf | 665 | static int dso__split_kallsyms(struct dso *dso, struct map *map, |
9de89fe7 | 666 | symbol_filter_t filter) |
2e538c4a | 667 | { |
9de89fe7 | 668 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 669 | struct machine *machine = kmaps->machine; |
4e06255f | 670 | struct map *curr_map = map; |
2e538c4a | 671 | struct symbol *pos; |
8a953312 | 672 | int count = 0, moved = 0; |
aeafcbaf | 673 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 674 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
675 | int kernel_range = 0; |
676 | ||
677 | while (next) { | |
678 | char *module; | |
679 | ||
680 | pos = rb_entry(next, struct symbol, rb_node); | |
681 | next = rb_next(&pos->rb_node); | |
682 | ||
683 | module = strchr(pos->name, '\t'); | |
684 | if (module) { | |
75be6cf4 | 685 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
686 | goto discard_symbol; |
687 | ||
2e538c4a ACM |
688 | *module++ = '\0'; |
689 | ||
b7cece76 | 690 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 691 | if (curr_map != map && |
aeafcbaf | 692 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 693 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
694 | /* |
695 | * We assume all symbols of a module are | |
696 | * continuous in * kallsyms, so curr_map | |
697 | * points to a module and all its | |
698 | * symbols are in its kmap. Mark it as | |
699 | * loaded. | |
700 | */ | |
701 | dso__set_loaded(curr_map->dso, | |
702 | curr_map->type); | |
703 | } | |
704 | ||
705 | curr_map = map_groups__find_by_name(kmaps, | |
706 | map->type, module); | |
4e06255f | 707 | if (curr_map == NULL) { |
2f51903b | 708 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 709 | "inconsistency while looking " |
a1645ce1 | 710 | "for \"%s\" module!\n", |
23346f21 | 711 | machine->root_dir, module); |
a1645ce1 ZY |
712 | curr_map = map; |
713 | goto discard_symbol; | |
af427bf5 | 714 | } |
b7cece76 | 715 | |
a1645ce1 | 716 | if (curr_map->dso->loaded && |
23346f21 | 717 | !machine__is_default_guest(machine)) |
b7cece76 | 718 | goto discard_symbol; |
af427bf5 | 719 | } |
2e538c4a ACM |
720 | /* |
721 | * So that we look just like we get from .ko files, | |
722 | * i.e. not prelinked, relative to map->start. | |
723 | */ | |
4e06255f ACM |
724 | pos->start = curr_map->map_ip(curr_map, pos->start); |
725 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
726 | } else if (curr_map != map) { | |
2e538c4a | 727 | char dso_name[PATH_MAX]; |
aeafcbaf | 728 | struct dso *ndso; |
2e538c4a | 729 | |
8a953312 ACM |
730 | if (count == 0) { |
731 | curr_map = map; | |
732 | goto filter_symbol; | |
733 | } | |
734 | ||
aeafcbaf | 735 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
736 | snprintf(dso_name, sizeof(dso_name), |
737 | "[guest.kernel].%d", | |
738 | kernel_range++); | |
739 | else | |
740 | snprintf(dso_name, sizeof(dso_name), | |
741 | "[kernel].%d", | |
742 | kernel_range++); | |
2e538c4a | 743 | |
aeafcbaf ACM |
744 | ndso = dso__new(dso_name); |
745 | if (ndso == NULL) | |
2e538c4a ACM |
746 | return -1; |
747 | ||
aeafcbaf | 748 | ndso->kernel = dso->kernel; |
a1645ce1 | 749 | |
aeafcbaf | 750 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 751 | if (curr_map == NULL) { |
aeafcbaf | 752 | dso__delete(ndso); |
2e538c4a ACM |
753 | return -1; |
754 | } | |
a2928c42 | 755 | |
4e06255f | 756 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 757 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
758 | ++kernel_range; |
759 | } | |
8a953312 | 760 | filter_symbol: |
4e06255f | 761 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 762 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 763 | symbol__delete(pos); |
2e538c4a | 764 | } else { |
4e06255f ACM |
765 | if (curr_map != map) { |
766 | rb_erase(&pos->rb_node, root); | |
767 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
768 | ++moved; |
769 | } else | |
770 | ++count; | |
9974f496 | 771 | } |
a2928c42 ACM |
772 | } |
773 | ||
a1645ce1 | 774 | if (curr_map != map && |
aeafcbaf | 775 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 776 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
777 | dso__set_loaded(curr_map->dso, curr_map->type); |
778 | } | |
779 | ||
8a953312 | 780 | return count + moved; |
2e538c4a | 781 | } |
a2928c42 | 782 | |
3f067dca ACM |
783 | bool symbol__restricted_filename(const char *filename, |
784 | const char *restricted_filename) | |
ec80fde7 ACM |
785 | { |
786 | bool restricted = false; | |
787 | ||
788 | if (symbol_conf.kptr_restrict) { | |
789 | char *r = realpath(filename, NULL); | |
790 | ||
791 | if (r != NULL) { | |
792 | restricted = strcmp(r, restricted_filename) == 0; | |
793 | free(r); | |
794 | return restricted; | |
795 | } | |
796 | } | |
797 | ||
798 | return restricted; | |
799 | } | |
800 | ||
8e0cf965 AH |
801 | struct kcore_mapfn_data { |
802 | struct dso *dso; | |
803 | enum map_type type; | |
804 | struct list_head maps; | |
805 | }; | |
806 | ||
807 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
808 | { | |
809 | struct kcore_mapfn_data *md = data; | |
810 | struct map *map; | |
811 | ||
812 | map = map__new2(start, md->dso, md->type); | |
813 | if (map == NULL) | |
814 | return -ENOMEM; | |
815 | ||
816 | map->end = map->start + len; | |
817 | map->pgoff = pgoff; | |
818 | ||
819 | list_add(&map->node, &md->maps); | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | /* | |
825 | * If kallsyms is referenced by name then we look for kcore in the same | |
826 | * directory. | |
827 | */ | |
828 | static bool kcore_filename_from_kallsyms_filename(char *kcore_filename, | |
829 | const char *kallsyms_filename) | |
830 | { | |
831 | char *name; | |
832 | ||
833 | strcpy(kcore_filename, kallsyms_filename); | |
834 | name = strrchr(kcore_filename, '/'); | |
835 | if (!name) | |
836 | return false; | |
837 | ||
838 | if (!strcmp(name, "/kallsyms")) { | |
839 | strcpy(name, "/kcore"); | |
840 | return true; | |
841 | } | |
842 | ||
843 | return false; | |
844 | } | |
845 | ||
846 | static int dso__load_kcore(struct dso *dso, struct map *map, | |
847 | const char *kallsyms_filename) | |
848 | { | |
849 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
850 | struct machine *machine = kmaps->machine; | |
851 | struct kcore_mapfn_data md; | |
852 | struct map *old_map, *new_map, *replacement_map = NULL; | |
853 | bool is_64_bit; | |
854 | int err, fd; | |
855 | char kcore_filename[PATH_MAX]; | |
856 | struct symbol *sym; | |
857 | ||
858 | /* This function requires that the map is the kernel map */ | |
859 | if (map != machine->vmlinux_maps[map->type]) | |
860 | return -EINVAL; | |
861 | ||
862 | if (!kcore_filename_from_kallsyms_filename(kcore_filename, | |
863 | kallsyms_filename)) | |
864 | return -EINVAL; | |
865 | ||
866 | md.dso = dso; | |
867 | md.type = map->type; | |
868 | INIT_LIST_HEAD(&md.maps); | |
869 | ||
870 | fd = open(kcore_filename, O_RDONLY); | |
871 | if (fd < 0) | |
872 | return -EINVAL; | |
873 | ||
874 | /* Read new maps into temporary lists */ | |
875 | err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md, | |
876 | &is_64_bit); | |
877 | if (err) | |
878 | goto out_err; | |
879 | ||
880 | if (list_empty(&md.maps)) { | |
881 | err = -EINVAL; | |
882 | goto out_err; | |
883 | } | |
884 | ||
885 | /* Remove old maps */ | |
886 | old_map = map_groups__first(kmaps, map->type); | |
887 | while (old_map) { | |
888 | struct map *next = map_groups__next(old_map); | |
889 | ||
890 | if (old_map != map) | |
891 | map_groups__remove(kmaps, old_map); | |
892 | old_map = next; | |
893 | } | |
894 | ||
895 | /* Find the kernel map using the first symbol */ | |
896 | sym = dso__first_symbol(dso, map->type); | |
897 | list_for_each_entry(new_map, &md.maps, node) { | |
898 | if (sym && sym->start >= new_map->start && | |
899 | sym->start < new_map->end) { | |
900 | replacement_map = new_map; | |
901 | break; | |
902 | } | |
903 | } | |
904 | ||
905 | if (!replacement_map) | |
906 | replacement_map = list_entry(md.maps.next, struct map, node); | |
907 | ||
908 | /* Add new maps */ | |
909 | while (!list_empty(&md.maps)) { | |
910 | new_map = list_entry(md.maps.next, struct map, node); | |
911 | list_del(&new_map->node); | |
912 | if (new_map == replacement_map) { | |
913 | map->start = new_map->start; | |
914 | map->end = new_map->end; | |
915 | map->pgoff = new_map->pgoff; | |
916 | map->map_ip = new_map->map_ip; | |
917 | map->unmap_ip = new_map->unmap_ip; | |
918 | map__delete(new_map); | |
919 | /* Ensure maps are correctly ordered */ | |
920 | map_groups__remove(kmaps, map); | |
921 | map_groups__insert(kmaps, map); | |
922 | } else { | |
923 | map_groups__insert(kmaps, new_map); | |
924 | } | |
925 | } | |
926 | ||
927 | /* | |
928 | * Set the data type and long name so that kcore can be read via | |
929 | * dso__data_read_addr(). | |
930 | */ | |
931 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
932 | dso->data_type = DSO_BINARY_TYPE__GUEST_KCORE; | |
933 | else | |
934 | dso->data_type = DSO_BINARY_TYPE__KCORE; | |
935 | dso__set_long_name(dso, strdup(kcore_filename)); | |
936 | ||
937 | close(fd); | |
938 | ||
939 | if (map->type == MAP__FUNCTION) | |
940 | pr_debug("Using %s for kernel object code\n", kcore_filename); | |
941 | else | |
942 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
943 | ||
944 | return 0; | |
945 | ||
946 | out_err: | |
947 | while (!list_empty(&md.maps)) { | |
948 | map = list_entry(md.maps.next, struct map, node); | |
949 | list_del(&map->node); | |
950 | map__delete(map); | |
951 | } | |
952 | close(fd); | |
953 | return -EINVAL; | |
954 | } | |
955 | ||
aeafcbaf | 956 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 957 | struct map *map, symbol_filter_t filter) |
2e538c4a | 958 | { |
ec80fde7 ACM |
959 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
960 | return -1; | |
961 | ||
aeafcbaf | 962 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
963 | return -1; |
964 | ||
694bf407 | 965 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
966 | symbols__fixup_end(&dso->symbols[map->type]); |
967 | ||
aeafcbaf | 968 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 969 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 970 | else |
44f24cb3 | 971 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 972 | |
8e0cf965 AH |
973 | if (!dso__load_kcore(dso, map, filename)) |
974 | return dso__split_kallsyms_for_kcore(dso, map, filter); | |
975 | else | |
976 | return dso__split_kallsyms(dso, map, filter); | |
af427bf5 ACM |
977 | } |
978 | ||
aeafcbaf | 979 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 980 | symbol_filter_t filter) |
80d496be PE |
981 | { |
982 | char *line = NULL; | |
983 | size_t n; | |
984 | FILE *file; | |
985 | int nr_syms = 0; | |
986 | ||
aeafcbaf | 987 | file = fopen(dso->long_name, "r"); |
80d496be PE |
988 | if (file == NULL) |
989 | goto out_failure; | |
990 | ||
991 | while (!feof(file)) { | |
9cffa8d5 | 992 | u64 start, size; |
80d496be PE |
993 | struct symbol *sym; |
994 | int line_len, len; | |
995 | ||
996 | line_len = getline(&line, &n, file); | |
997 | if (line_len < 0) | |
998 | break; | |
999 | ||
1000 | if (!line) | |
1001 | goto out_failure; | |
1002 | ||
1003 | line[--line_len] = '\0'; /* \n */ | |
1004 | ||
1005 | len = hex2u64(line, &start); | |
1006 | ||
1007 | len++; | |
1008 | if (len + 2 >= line_len) | |
1009 | continue; | |
1010 | ||
1011 | len += hex2u64(line + len, &size); | |
1012 | ||
1013 | len++; | |
1014 | if (len + 2 >= line_len) | |
1015 | continue; | |
1016 | ||
c408fedf | 1017 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
1018 | |
1019 | if (sym == NULL) | |
1020 | goto out_delete_line; | |
1021 | ||
439d473b | 1022 | if (filter && filter(map, sym)) |
00a192b3 | 1023 | symbol__delete(sym); |
80d496be | 1024 | else { |
aeafcbaf | 1025 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
1026 | nr_syms++; |
1027 | } | |
1028 | } | |
1029 | ||
1030 | free(line); | |
1031 | fclose(file); | |
1032 | ||
1033 | return nr_syms; | |
1034 | ||
1035 | out_delete_line: | |
1036 | free(line); | |
1037 | out_failure: | |
1038 | return -1; | |
1039 | } | |
1040 | ||
aeafcbaf | 1041 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1042 | { |
c338aee8 | 1043 | char *name; |
a2928c42 | 1044 | int ret = -1; |
44f24cb3 | 1045 | u_int i; |
23346f21 | 1046 | struct machine *machine; |
44f24cb3 | 1047 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1048 | int ss_pos = 0; |
1049 | struct symsrc ss_[2]; | |
1050 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
a2928c42 | 1051 | |
aeafcbaf | 1052 | dso__set_loaded(dso, map->type); |
66bd8424 | 1053 | |
aeafcbaf ACM |
1054 | if (dso->kernel == DSO_TYPE_KERNEL) |
1055 | return dso__load_kernel_sym(dso, map, filter); | |
1056 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1057 | return dso__load_guest_kernel_sym(dso, map, filter); | |
a1645ce1 | 1058 | |
23346f21 ACM |
1059 | if (map->groups && map->groups->machine) |
1060 | machine = map->groups->machine; | |
a1645ce1 | 1061 | else |
23346f21 | 1062 | machine = NULL; |
c338aee8 | 1063 | |
aeafcbaf | 1064 | dso->adjust_symbols = 0; |
f5812a7a | 1065 | |
aeafcbaf | 1066 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1067 | struct stat st; |
1068 | ||
e9b52ef2 | 1069 | if (lstat(dso->name, &st) < 0) |
981c1252 PE |
1070 | return -1; |
1071 | ||
1072 | if (st.st_uid && (st.st_uid != geteuid())) { | |
1073 | pr_warning("File %s not owned by current user or root, " | |
1074 | "ignoring it.\n", dso->name); | |
1075 | return -1; | |
1076 | } | |
1077 | ||
aeafcbaf | 1078 | ret = dso__load_perf_map(dso, map, filter); |
44f24cb3 JO |
1079 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1080 | DSO_BINARY_TYPE__NOT_FOUND; | |
94cb9e38 ACM |
1081 | return ret; |
1082 | } | |
1083 | ||
44f24cb3 JO |
1084 | if (machine) |
1085 | root_dir = machine->root_dir; | |
1086 | ||
164c800e DA |
1087 | name = malloc(PATH_MAX); |
1088 | if (!name) | |
1089 | return -1; | |
1090 | ||
6da80ce8 | 1091 | /* Iterate over candidate debug images. |
3aafe5ae CS |
1092 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1093 | * and/or opd section) for processing. | |
6da80ce8 | 1094 | */ |
44f24cb3 | 1095 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1096 | struct symsrc *ss = &ss_[ss_pos]; |
1097 | bool next_slot = false; | |
6da80ce8 | 1098 | |
005f9294 | 1099 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1100 | |
005f9294 | 1101 | if (dso__binary_type_file(dso, symtab_type, |
44f24cb3 JO |
1102 | root_dir, name, PATH_MAX)) |
1103 | continue; | |
6da80ce8 DM |
1104 | |
1105 | /* Name is now the name of the next image to try */ | |
3aafe5ae | 1106 | if (symsrc__init(ss, dso, name, symtab_type) < 0) |
6da80ce8 | 1107 | continue; |
a2928c42 | 1108 | |
3aafe5ae CS |
1109 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1110 | syms_ss = ss; | |
1111 | next_slot = true; | |
d26cd12b CS |
1112 | } |
1113 | ||
3aafe5ae CS |
1114 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1115 | runtime_ss = ss; | |
1116 | next_slot = true; | |
a44f605b | 1117 | } |
a2928c42 | 1118 | |
3aafe5ae CS |
1119 | if (next_slot) { |
1120 | ss_pos++; | |
33ff581e | 1121 | |
3aafe5ae CS |
1122 | if (syms_ss && runtime_ss) |
1123 | break; | |
6da80ce8 | 1124 | } |
3aafe5ae | 1125 | |
a25e46c4 | 1126 | } |
6da80ce8 | 1127 | |
3aafe5ae CS |
1128 | if (!runtime_ss && !syms_ss) |
1129 | goto out_free; | |
1130 | ||
1131 | if (runtime_ss && !syms_ss) { | |
1132 | syms_ss = runtime_ss; | |
1133 | } | |
1134 | ||
1135 | /* We'll have to hope for the best */ | |
1136 | if (!runtime_ss && syms_ss) | |
1137 | runtime_ss = syms_ss; | |
1138 | ||
0131c4ec AH |
1139 | if (syms_ss) { |
1140 | int km; | |
1141 | ||
1142 | km = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
1143 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
1144 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, km); | |
1145 | } else { | |
3aafe5ae | 1146 | ret = -1; |
0131c4ec | 1147 | } |
3aafe5ae | 1148 | |
f47b58b7 | 1149 | if (ret > 0) { |
3aafe5ae CS |
1150 | int nr_plt; |
1151 | ||
1152 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map, filter); | |
1153 | if (nr_plt > 0) | |
1154 | ret += nr_plt; | |
60e4b10c ACM |
1155 | } |
1156 | ||
3aafe5ae CS |
1157 | for (; ss_pos > 0; ss_pos--) |
1158 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1159 | out_free: | |
a2928c42 | 1160 | free(name); |
aeafcbaf | 1161 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
1340e6bb | 1162 | return 0; |
a2928c42 ACM |
1163 | return ret; |
1164 | } | |
1165 | ||
aeafcbaf | 1166 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1167 | enum map_type type, const char *name) |
439d473b ACM |
1168 | { |
1169 | struct rb_node *nd; | |
1170 | ||
aeafcbaf | 1171 | for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1172 | struct map *map = rb_entry(nd, struct map, rb_node); |
1173 | ||
b7cece76 | 1174 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1175 | return map; |
1176 | } | |
1177 | ||
1178 | return NULL; | |
1179 | } | |
1180 | ||
aeafcbaf | 1181 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
fd930ff9 | 1182 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1183 | { |
b68e2f91 CS |
1184 | int err = -1; |
1185 | struct symsrc ss; | |
ec5761ea | 1186 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1187 | enum dso_binary_type symtab_type; |
a2928c42 | 1188 | |
5698d2c9 NK |
1189 | if (vmlinux[0] == '/') |
1190 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1191 | else | |
1192 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s", | |
1193 | symbol_conf.symfs, vmlinux); | |
a2928c42 | 1194 | |
21ea4539 | 1195 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1196 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1197 | else |
005f9294 | 1198 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1199 | |
005f9294 | 1200 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1201 | return -1; |
1202 | ||
261360b6 | 1203 | err = dso__load_sym(dso, map, &ss, &ss, filter, 0); |
b68e2f91 | 1204 | symsrc__destroy(&ss); |
a2928c42 | 1205 | |
515850e4 | 1206 | if (err > 0) { |
39b12f78 AH |
1207 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
1208 | dso->data_type = DSO_BINARY_TYPE__GUEST_VMLINUX; | |
1209 | else | |
1210 | dso->data_type = DSO_BINARY_TYPE__VMLINUX; | |
515850e4 CS |
1211 | dso__set_long_name(dso, (char *)vmlinux); |
1212 | dso__set_loaded(dso, map->type); | |
ec5761ea | 1213 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1214 | } |
3846df2e | 1215 | |
a2928c42 ACM |
1216 | return err; |
1217 | } | |
1218 | ||
aeafcbaf | 1219 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 1220 | symbol_filter_t filter) |
a19afe46 ACM |
1221 | { |
1222 | int i, err = 0; | |
5ad90e4e | 1223 | char *filename; |
a19afe46 ACM |
1224 | |
1225 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
1226 | vmlinux_path__nr_entries + 1); |
1227 | ||
aeafcbaf | 1228 | filename = dso__build_id_filename(dso, NULL, 0); |
5ad90e4e | 1229 | if (filename != NULL) { |
aeafcbaf | 1230 | err = dso__load_vmlinux(dso, map, filename, filter); |
b7c14a0b DA |
1231 | if (err > 0) { |
1232 | dso->lname_alloc = 1; | |
5ad90e4e | 1233 | goto out; |
b7c14a0b | 1234 | } |
5ad90e4e ACM |
1235 | free(filename); |
1236 | } | |
a19afe46 ACM |
1237 | |
1238 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
aeafcbaf | 1239 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], filter); |
a19afe46 | 1240 | if (err > 0) { |
aeafcbaf | 1241 | dso__set_long_name(dso, strdup(vmlinux_path[i])); |
b7c14a0b | 1242 | dso->lname_alloc = 1; |
a19afe46 ACM |
1243 | break; |
1244 | } | |
1245 | } | |
5ad90e4e | 1246 | out: |
a19afe46 ACM |
1247 | return err; |
1248 | } | |
1249 | ||
aeafcbaf | 1250 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 1251 | symbol_filter_t filter) |
a827c875 | 1252 | { |
cc612d81 | 1253 | int err; |
9e201442 ACM |
1254 | const char *kallsyms_filename = NULL; |
1255 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1256 | /* |
b226a5a7 DA |
1257 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1258 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1259 | * |
1260 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1261 | * build-id, or if the user specifies the wrong path to the right | |
1262 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1263 | * x86_86 one, on the machine where analysis is being performed, say), | |
1264 | * or worse, /proc/kallsyms. | |
1265 | * | |
1266 | * If the specified file _has_ a build-id and there is a build-id | |
1267 | * section in the perf.data file, we will still do the expected | |
1268 | * validation in dso__load_vmlinux and will bail out if they don't | |
1269 | * match. | |
1270 | */ | |
b226a5a7 DA |
1271 | if (symbol_conf.kallsyms_name != NULL) { |
1272 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1273 | goto do_kallsyms; | |
1274 | } | |
1275 | ||
fc2be696 | 1276 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
aeafcbaf | 1277 | err = dso__load_vmlinux(dso, map, |
dc8d6ab2 | 1278 | symbol_conf.vmlinux_name, filter); |
e7dadc00 | 1279 | if (err > 0) { |
aeafcbaf | 1280 | dso__set_long_name(dso, |
e7dadc00 | 1281 | strdup(symbol_conf.vmlinux_name)); |
b7c14a0b | 1282 | dso->lname_alloc = 1; |
39b12f78 | 1283 | return err; |
e7dadc00 ACM |
1284 | } |
1285 | return err; | |
dc8d6ab2 | 1286 | } |
cc612d81 | 1287 | |
fc2be696 | 1288 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
aeafcbaf | 1289 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 | 1290 | if (err > 0) |
39b12f78 | 1291 | return err; |
cc612d81 ACM |
1292 | } |
1293 | ||
ec5761ea DA |
1294 | /* do not try local files if a symfs was given */ |
1295 | if (symbol_conf.symfs[0] != 0) | |
1296 | return -1; | |
1297 | ||
b7cece76 ACM |
1298 | /* |
1299 | * Say the kernel DSO was created when processing the build-id header table, | |
1300 | * we have a build-id, so check if it is the same as the running kernel, | |
1301 | * using it if it is. | |
1302 | */ | |
aeafcbaf | 1303 | if (dso->has_build_id) { |
b7cece76 | 1304 | u8 kallsyms_build_id[BUILD_ID_SIZE]; |
9e201442 | 1305 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
1306 | |
1307 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 1308 | sizeof(kallsyms_build_id)) == 0) { |
aeafcbaf | 1309 | if (dso__build_id_equal(dso, kallsyms_build_id)) { |
9e201442 | 1310 | kallsyms_filename = "/proc/kallsyms"; |
8d0591f6 | 1311 | goto do_kallsyms; |
9e201442 | 1312 | } |
8d0591f6 | 1313 | } |
dc8d6ab2 ACM |
1314 | /* |
1315 | * Now look if we have it on the build-id cache in | |
1316 | * $HOME/.debug/[kernel.kallsyms]. | |
1317 | */ | |
aeafcbaf | 1318 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), |
9e201442 ACM |
1319 | sbuild_id); |
1320 | ||
1321 | if (asprintf(&kallsyms_allocated_filename, | |
1322 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
1323 | getenv("HOME"), sbuild_id) == -1) { |
1324 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 1325 | return -1; |
3846df2e | 1326 | } |
dc8d6ab2 | 1327 | |
19fc2ded ACM |
1328 | kallsyms_filename = kallsyms_allocated_filename; |
1329 | ||
dc8d6ab2 | 1330 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
1331 | pr_err("No kallsyms or vmlinux with build-id %s " |
1332 | "was found\n", sbuild_id); | |
9e201442 | 1333 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 1334 | return -1; |
9e201442 | 1335 | } |
dc8d6ab2 ACM |
1336 | } else { |
1337 | /* | |
1338 | * Last resort, if we don't have a build-id and couldn't find | |
1339 | * any vmlinux file, try the running kernel kallsyms table. | |
1340 | */ | |
9e201442 | 1341 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 1342 | } |
439d473b | 1343 | |
cc612d81 | 1344 | do_kallsyms: |
aeafcbaf | 1345 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
1346 | if (err > 0) |
1347 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1348 | free(kallsyms_allocated_filename); |
439d473b | 1349 | |
8e0cf965 | 1350 | if (err > 0 && !dso__is_kcore(dso)) { |
0a0317b4 | 1351 | dso__set_long_name(dso, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
1352 | map__fixup_start(map); |
1353 | map__fixup_end(map); | |
439d473b | 1354 | } |
94cb9e38 | 1355 | |
a827c875 ACM |
1356 | return err; |
1357 | } | |
1358 | ||
aeafcbaf ACM |
1359 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
1360 | symbol_filter_t filter) | |
a1645ce1 ZY |
1361 | { |
1362 | int err; | |
1363 | const char *kallsyms_filename = NULL; | |
23346f21 | 1364 | struct machine *machine; |
a1645ce1 ZY |
1365 | char path[PATH_MAX]; |
1366 | ||
1367 | if (!map->groups) { | |
1368 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1369 | return -1; | |
1370 | } | |
23346f21 | 1371 | machine = map->groups->machine; |
a1645ce1 | 1372 | |
23346f21 | 1373 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1374 | /* |
1375 | * if the user specified a vmlinux filename, use it and only | |
1376 | * it, reporting errors to the user if it cannot be used. | |
1377 | * Or use file guest_kallsyms inputted by user on commandline | |
1378 | */ | |
1379 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1380 | err = dso__load_vmlinux(dso, map, |
a1645ce1 | 1381 | symbol_conf.default_guest_vmlinux_name, filter); |
39b12f78 | 1382 | return err; |
a1645ce1 ZY |
1383 | } |
1384 | ||
1385 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1386 | if (!kallsyms_filename) | |
1387 | return -1; | |
1388 | } else { | |
23346f21 | 1389 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1390 | kallsyms_filename = path; |
1391 | } | |
1392 | ||
aeafcbaf | 1393 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
8e0cf965 | 1394 | if (err > 0) |
39b12f78 | 1395 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 1396 | if (err > 0 && !dso__is_kcore(dso)) { |
39b12f78 AH |
1397 | machine__mmap_name(machine, path, sizeof(path)); |
1398 | dso__set_long_name(dso, strdup(path)); | |
a1645ce1 ZY |
1399 | map__fixup_start(map); |
1400 | map__fixup_end(map); | |
1401 | } | |
1402 | ||
1403 | return err; | |
1404 | } | |
cd84c2ac | 1405 | |
cc612d81 ACM |
1406 | static void vmlinux_path__exit(void) |
1407 | { | |
1408 | while (--vmlinux_path__nr_entries >= 0) { | |
1409 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
1410 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
1411 | } | |
1412 | ||
1413 | free(vmlinux_path); | |
1414 | vmlinux_path = NULL; | |
1415 | } | |
1416 | ||
1417 | static int vmlinux_path__init(void) | |
1418 | { | |
1419 | struct utsname uts; | |
1420 | char bf[PATH_MAX]; | |
1421 | ||
cc612d81 ACM |
1422 | vmlinux_path = malloc(sizeof(char *) * 5); |
1423 | if (vmlinux_path == NULL) | |
1424 | return -1; | |
1425 | ||
1426 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
1427 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1428 | goto out_fail; | |
1429 | ++vmlinux_path__nr_entries; | |
1430 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
1431 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1432 | goto out_fail; | |
1433 | ++vmlinux_path__nr_entries; | |
ec5761ea DA |
1434 | |
1435 | /* only try running kernel version if no symfs was given */ | |
1436 | if (symbol_conf.symfs[0] != 0) | |
1437 | return 0; | |
1438 | ||
1439 | if (uname(&uts) < 0) | |
1440 | return -1; | |
1441 | ||
cc612d81 ACM |
1442 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); |
1443 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1444 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1445 | goto out_fail; | |
1446 | ++vmlinux_path__nr_entries; | |
1447 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
1448 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1449 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1450 | goto out_fail; | |
1451 | ++vmlinux_path__nr_entries; | |
1452 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
1453 | uts.release); | |
1454 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1455 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1456 | goto out_fail; | |
1457 | ++vmlinux_path__nr_entries; | |
1458 | ||
1459 | return 0; | |
1460 | ||
1461 | out_fail: | |
1462 | vmlinux_path__exit(); | |
1463 | return -1; | |
1464 | } | |
1465 | ||
655000e7 ACM |
1466 | static int setup_list(struct strlist **list, const char *list_str, |
1467 | const char *list_name) | |
1468 | { | |
1469 | if (list_str == NULL) | |
1470 | return 0; | |
1471 | ||
1472 | *list = strlist__new(true, list_str); | |
1473 | if (!*list) { | |
1474 | pr_err("problems parsing %s list\n", list_name); | |
1475 | return -1; | |
1476 | } | |
1477 | return 0; | |
1478 | } | |
1479 | ||
ec80fde7 ACM |
1480 | static bool symbol__read_kptr_restrict(void) |
1481 | { | |
1482 | bool value = false; | |
1483 | ||
1484 | if (geteuid() != 0) { | |
1485 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
1486 | if (fp != NULL) { | |
1487 | char line[8]; | |
1488 | ||
1489 | if (fgets(line, sizeof(line), fp) != NULL) | |
1490 | value = atoi(line) != 0; | |
1491 | ||
1492 | fclose(fp); | |
1493 | } | |
1494 | } | |
1495 | ||
1496 | return value; | |
1497 | } | |
1498 | ||
75be6cf4 | 1499 | int symbol__init(void) |
2446042c | 1500 | { |
ec5761ea DA |
1501 | const char *symfs; |
1502 | ||
85e00b55 JZ |
1503 | if (symbol_conf.initialized) |
1504 | return 0; | |
1505 | ||
9ac3e487 | 1506 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 1507 | |
166ccc9c NK |
1508 | symbol__elf_init(); |
1509 | ||
75be6cf4 ACM |
1510 | if (symbol_conf.sort_by_name) |
1511 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
1512 | sizeof(struct symbol)); | |
b32d133a | 1513 | |
75be6cf4 | 1514 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
1515 | return -1; |
1516 | ||
c410a338 ACM |
1517 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
1518 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
1519 | return -1; | |
1520 | } | |
1521 | ||
655000e7 ACM |
1522 | if (setup_list(&symbol_conf.dso_list, |
1523 | symbol_conf.dso_list_str, "dso") < 0) | |
1524 | return -1; | |
1525 | ||
1526 | if (setup_list(&symbol_conf.comm_list, | |
1527 | symbol_conf.comm_list_str, "comm") < 0) | |
1528 | goto out_free_dso_list; | |
1529 | ||
1530 | if (setup_list(&symbol_conf.sym_list, | |
1531 | symbol_conf.sym_list_str, "symbol") < 0) | |
1532 | goto out_free_comm_list; | |
1533 | ||
ec5761ea DA |
1534 | /* |
1535 | * A path to symbols of "/" is identical to "" | |
1536 | * reset here for simplicity. | |
1537 | */ | |
1538 | symfs = realpath(symbol_conf.symfs, NULL); | |
1539 | if (symfs == NULL) | |
1540 | symfs = symbol_conf.symfs; | |
1541 | if (strcmp(symfs, "/") == 0) | |
1542 | symbol_conf.symfs = ""; | |
1543 | if (symfs != symbol_conf.symfs) | |
1544 | free((void *)symfs); | |
1545 | ||
ec80fde7 ACM |
1546 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
1547 | ||
85e00b55 | 1548 | symbol_conf.initialized = true; |
4aa65636 | 1549 | return 0; |
655000e7 | 1550 | |
655000e7 ACM |
1551 | out_free_comm_list: |
1552 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
1553 | out_free_dso_list: |
1554 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 1555 | return -1; |
4aa65636 ACM |
1556 | } |
1557 | ||
d65a458b ACM |
1558 | void symbol__exit(void) |
1559 | { | |
85e00b55 JZ |
1560 | if (!symbol_conf.initialized) |
1561 | return; | |
d65a458b ACM |
1562 | strlist__delete(symbol_conf.sym_list); |
1563 | strlist__delete(symbol_conf.dso_list); | |
1564 | strlist__delete(symbol_conf.comm_list); | |
1565 | vmlinux_path__exit(); | |
1566 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 1567 | symbol_conf.initialized = false; |
d65a458b | 1568 | } |