Commit | Line | Data |
---|---|---|
a2928c42 ACM |
1 | #include "util.h" |
2 | #include "../perf.h" | |
a0055ae2 | 3 | #include "string.h" |
a2928c42 | 4 | #include "symbol.h" |
439d473b | 5 | #include "thread.h" |
a2928c42 | 6 | |
8f28827a FW |
7 | #include "debug.h" |
8 | ||
a2928c42 ACM |
9 | #include <libelf.h> |
10 | #include <gelf.h> | |
11 | #include <elf.h> | |
439d473b | 12 | #include <sys/utsname.h> |
2cdbc46d | 13 | |
94cb9e38 ACM |
14 | enum dso_origin { |
15 | DSO__ORIG_KERNEL = 0, | |
16 | DSO__ORIG_JAVA_JIT, | |
17 | DSO__ORIG_FEDORA, | |
18 | DSO__ORIG_UBUNTU, | |
19 | DSO__ORIG_BUILDID, | |
20 | DSO__ORIG_DSO, | |
439d473b | 21 | DSO__ORIG_KMODULE, |
94cb9e38 ACM |
22 | DSO__ORIG_NOT_FOUND, |
23 | }; | |
24 | ||
439d473b ACM |
25 | static void dsos__add(struct dso *dso); |
26 | static struct dso *dsos__find(const char *name); | |
2e538c4a ACM |
27 | static struct map *map__new2(u64 start, struct dso *dso); |
28 | static void kernel_maps__insert(struct map *map); | |
00a192b3 | 29 | unsigned int symbol__priv_size; |
439d473b | 30 | |
af427bf5 ACM |
31 | static struct rb_root kernel_maps; |
32 | ||
2e538c4a | 33 | static void dso__fixup_sym_end(struct dso *self) |
af427bf5 ACM |
34 | { |
35 | struct rb_node *nd, *prevnd = rb_first(&self->syms); | |
2e538c4a | 36 | struct symbol *curr, *prev; |
af427bf5 ACM |
37 | |
38 | if (prevnd == NULL) | |
39 | return; | |
40 | ||
2e538c4a ACM |
41 | curr = rb_entry(prevnd, struct symbol, rb_node); |
42 | ||
af427bf5 | 43 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
44 | prev = curr; |
45 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 ACM |
46 | |
47 | if (prev->end == prev->start) | |
48 | prev->end = curr->start - 1; | |
af427bf5 | 49 | } |
2e538c4a ACM |
50 | |
51 | /* Last entry */ | |
52 | if (curr->end == curr->start) | |
53 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
54 | } |
55 | ||
2e538c4a | 56 | static void kernel_maps__fixup_end(void) |
af427bf5 ACM |
57 | { |
58 | struct map *prev, *curr; | |
59 | struct rb_node *nd, *prevnd = rb_first(&kernel_maps); | |
60 | ||
61 | if (prevnd == NULL) | |
62 | return; | |
63 | ||
64 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
65 | |
66 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
67 | prev = curr; | |
68 | curr = rb_entry(nd, struct map, rb_node); | |
69 | prev->end = curr->start - 1; | |
2e538c4a ACM |
70 | } |
71 | ||
72 | nd = rb_last(&curr->dso->syms); | |
73 | if (nd) { | |
74 | struct symbol *sym = rb_entry(nd, struct symbol, rb_node); | |
75 | curr->end = sym->end; | |
af427bf5 ACM |
76 | } |
77 | } | |
78 | ||
00a192b3 | 79 | static struct symbol *symbol__new(u64 start, u64 len, const char *name) |
a2928c42 | 80 | { |
0085c954 | 81 | size_t namelen = strlen(name) + 1; |
00a192b3 ACM |
82 | struct symbol *self = calloc(1, (symbol__priv_size + |
83 | sizeof(*self) + namelen)); | |
0b73da3f IM |
84 | if (!self) |
85 | return NULL; | |
86 | ||
00a192b3 ACM |
87 | if (symbol__priv_size) { |
88 | memset(self, 0, symbol__priv_size); | |
89 | self = ((void *)self) + symbol__priv_size; | |
a2928c42 | 90 | } |
0b73da3f | 91 | self->start = start; |
6cfcc53e | 92 | self->end = len ? start + len - 1 : start; |
e4204992 | 93 | |
6beba7ad | 94 | pr_debug3("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end); |
e4204992 | 95 | |
0b73da3f | 96 | memcpy(self->name, name, namelen); |
a2928c42 ACM |
97 | |
98 | return self; | |
99 | } | |
100 | ||
00a192b3 | 101 | static void symbol__delete(struct symbol *self) |
a2928c42 | 102 | { |
00a192b3 | 103 | free(((void *)self) - symbol__priv_size); |
a2928c42 ACM |
104 | } |
105 | ||
106 | static size_t symbol__fprintf(struct symbol *self, FILE *fp) | |
107 | { | |
439d473b | 108 | return fprintf(fp, " %llx-%llx %s\n", |
a2928c42 ACM |
109 | self->start, self->end, self->name); |
110 | } | |
111 | ||
00a192b3 | 112 | struct dso *dso__new(const char *name) |
a2928c42 ACM |
113 | { |
114 | struct dso *self = malloc(sizeof(*self) + strlen(name) + 1); | |
115 | ||
116 | if (self != NULL) { | |
117 | strcpy(self->name, name); | |
439d473b ACM |
118 | self->long_name = self->name; |
119 | self->short_name = self->name; | |
a2928c42 | 120 | self->syms = RB_ROOT; |
fc54db51 | 121 | self->find_symbol = dso__find_symbol; |
52d422de | 122 | self->slen_calculated = 0; |
94cb9e38 | 123 | self->origin = DSO__ORIG_NOT_FOUND; |
8d06367f ACM |
124 | self->loaded = 0; |
125 | self->has_build_id = 0; | |
a2928c42 ACM |
126 | } |
127 | ||
128 | return self; | |
129 | } | |
130 | ||
131 | static void dso__delete_symbols(struct dso *self) | |
132 | { | |
133 | struct symbol *pos; | |
134 | struct rb_node *next = rb_first(&self->syms); | |
135 | ||
136 | while (next) { | |
137 | pos = rb_entry(next, struct symbol, rb_node); | |
138 | next = rb_next(&pos->rb_node); | |
c8c96525 | 139 | rb_erase(&pos->rb_node, &self->syms); |
00a192b3 | 140 | symbol__delete(pos); |
a2928c42 ACM |
141 | } |
142 | } | |
143 | ||
144 | void dso__delete(struct dso *self) | |
145 | { | |
146 | dso__delete_symbols(self); | |
439d473b ACM |
147 | if (self->long_name != self->name) |
148 | free(self->long_name); | |
a2928c42 ACM |
149 | free(self); |
150 | } | |
151 | ||
8d06367f ACM |
152 | void dso__set_build_id(struct dso *self, void *build_id) |
153 | { | |
154 | memcpy(self->build_id, build_id, sizeof(self->build_id)); | |
155 | self->has_build_id = 1; | |
156 | } | |
157 | ||
a2928c42 ACM |
158 | static void dso__insert_symbol(struct dso *self, struct symbol *sym) |
159 | { | |
160 | struct rb_node **p = &self->syms.rb_node; | |
161 | struct rb_node *parent = NULL; | |
9cffa8d5 | 162 | const u64 ip = sym->start; |
a2928c42 ACM |
163 | struct symbol *s; |
164 | ||
165 | while (*p != NULL) { | |
166 | parent = *p; | |
167 | s = rb_entry(parent, struct symbol, rb_node); | |
168 | if (ip < s->start) | |
169 | p = &(*p)->rb_left; | |
170 | else | |
171 | p = &(*p)->rb_right; | |
172 | } | |
173 | rb_link_node(&sym->rb_node, parent, p); | |
174 | rb_insert_color(&sym->rb_node, &self->syms); | |
175 | } | |
176 | ||
9cffa8d5 | 177 | struct symbol *dso__find_symbol(struct dso *self, u64 ip) |
a2928c42 ACM |
178 | { |
179 | struct rb_node *n; | |
180 | ||
181 | if (self == NULL) | |
182 | return NULL; | |
183 | ||
184 | n = self->syms.rb_node; | |
185 | ||
186 | while (n) { | |
187 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
188 | ||
189 | if (ip < s->start) | |
190 | n = n->rb_left; | |
191 | else if (ip > s->end) | |
192 | n = n->rb_right; | |
193 | else | |
194 | return s; | |
195 | } | |
196 | ||
197 | return NULL; | |
198 | } | |
199 | ||
8d06367f | 200 | int build_id__sprintf(u8 *self, int len, char *bf) |
a2928c42 | 201 | { |
8d06367f ACM |
202 | char *bid = bf; |
203 | u8 *raw = self; | |
204 | int i; | |
a2928c42 | 205 | |
8d06367f ACM |
206 | for (i = 0; i < len; ++i) { |
207 | sprintf(bid, "%02x", *raw); | |
208 | ++raw; | |
209 | bid += 2; | |
210 | } | |
211 | ||
212 | return raw - self; | |
213 | } | |
214 | ||
9e03eb2d | 215 | size_t dso__fprintf_buildid(struct dso *self, FILE *fp) |
8d06367f ACM |
216 | { |
217 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f ACM |
218 | |
219 | build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id); | |
9e03eb2d ACM |
220 | return fprintf(fp, "%s", sbuild_id); |
221 | } | |
222 | ||
223 | size_t dso__fprintf(struct dso *self, FILE *fp) | |
224 | { | |
225 | struct rb_node *nd; | |
226 | size_t ret = fprintf(fp, "dso: %s (", self->short_name); | |
227 | ||
228 | ret += dso__fprintf_buildid(self, fp); | |
229 | ret += fprintf(fp, ")\n"); | |
8d06367f | 230 | |
a2928c42 ACM |
231 | for (nd = rb_first(&self->syms); nd; nd = rb_next(nd)) { |
232 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
233 | ret += symbol__fprintf(pos, fp); | |
234 | } | |
235 | ||
236 | return ret; | |
237 | } | |
238 | ||
2e538c4a ACM |
239 | /* |
240 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
241 | * so that we can in the next step set the symbol ->end address and then | |
242 | * call kernel_maps__split_kallsyms. | |
243 | */ | |
6beba7ad | 244 | static int kernel_maps__load_all_kallsyms(void) |
a2928c42 | 245 | { |
a2928c42 ACM |
246 | char *line = NULL; |
247 | size_t n; | |
248 | FILE *file = fopen("/proc/kallsyms", "r"); | |
249 | ||
250 | if (file == NULL) | |
251 | goto out_failure; | |
252 | ||
253 | while (!feof(file)) { | |
9cffa8d5 | 254 | u64 start; |
a2928c42 ACM |
255 | struct symbol *sym; |
256 | int line_len, len; | |
257 | char symbol_type; | |
2e538c4a | 258 | char *symbol_name; |
a2928c42 ACM |
259 | |
260 | line_len = getline(&line, &n, file); | |
261 | if (line_len < 0) | |
262 | break; | |
263 | ||
264 | if (!line) | |
265 | goto out_failure; | |
266 | ||
267 | line[--line_len] = '\0'; /* \n */ | |
268 | ||
a0055ae2 | 269 | len = hex2u64(line, &start); |
a2928c42 ACM |
270 | |
271 | len++; | |
272 | if (len + 2 >= line_len) | |
273 | continue; | |
274 | ||
275 | symbol_type = toupper(line[len]); | |
276 | /* | |
277 | * We're interested only in code ('T'ext) | |
278 | */ | |
279 | if (symbol_type != 'T' && symbol_type != 'W') | |
280 | continue; | |
af427bf5 ACM |
281 | |
282 | symbol_name = line + len + 2; | |
2e538c4a ACM |
283 | /* |
284 | * Will fix up the end later, when we have all symbols sorted. | |
285 | */ | |
00a192b3 | 286 | sym = symbol__new(start, 0, symbol_name); |
af427bf5 | 287 | |
2e538c4a ACM |
288 | if (sym == NULL) |
289 | goto out_delete_line; | |
290 | ||
82164161 ACM |
291 | /* |
292 | * We will pass the symbols to the filter later, in | |
293 | * kernel_maps__split_kallsyms, when we have split the | |
294 | * maps per module | |
295 | */ | |
2e538c4a ACM |
296 | dso__insert_symbol(kernel_map->dso, sym); |
297 | } | |
298 | ||
299 | free(line); | |
300 | fclose(file); | |
301 | ||
302 | return 0; | |
303 | ||
304 | out_delete_line: | |
305 | free(line); | |
306 | out_failure: | |
307 | return -1; | |
308 | } | |
309 | ||
310 | /* | |
311 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
312 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
313 | * the original ELF section names vmlinux have. | |
314 | */ | |
315 | static int kernel_maps__split_kallsyms(symbol_filter_t filter, int use_modules) | |
316 | { | |
317 | struct map *map = kernel_map; | |
318 | struct symbol *pos; | |
319 | int count = 0; | |
320 | struct rb_node *next = rb_first(&kernel_map->dso->syms); | |
321 | int kernel_range = 0; | |
322 | ||
323 | while (next) { | |
324 | char *module; | |
325 | ||
326 | pos = rb_entry(next, struct symbol, rb_node); | |
327 | next = rb_next(&pos->rb_node); | |
328 | ||
329 | module = strchr(pos->name, '\t'); | |
330 | if (module) { | |
af427bf5 | 331 | if (!use_modules) |
2e538c4a ACM |
332 | goto delete_symbol; |
333 | ||
334 | *module++ = '\0'; | |
335 | ||
af427bf5 ACM |
336 | if (strcmp(map->dso->name, module)) { |
337 | map = kernel_maps__find_by_dso_name(module); | |
338 | if (!map) { | |
6beba7ad ACM |
339 | pr_err("/proc/{kallsyms,modules} " |
340 | "inconsistency!\n"); | |
af427bf5 ACM |
341 | return -1; |
342 | } | |
343 | } | |
2e538c4a ACM |
344 | /* |
345 | * So that we look just like we get from .ko files, | |
346 | * i.e. not prelinked, relative to map->start. | |
347 | */ | |
348 | pos->start = map->map_ip(map, pos->start); | |
349 | pos->end = map->map_ip(map, pos->end); | |
350 | } else if (map != kernel_map) { | |
351 | char dso_name[PATH_MAX]; | |
352 | struct dso *dso; | |
353 | ||
354 | snprintf(dso_name, sizeof(dso_name), "[kernel].%d", | |
355 | kernel_range++); | |
356 | ||
00a192b3 | 357 | dso = dso__new(dso_name); |
2e538c4a ACM |
358 | if (dso == NULL) |
359 | return -1; | |
360 | ||
361 | map = map__new2(pos->start, dso); | |
362 | if (map == NULL) { | |
363 | dso__delete(dso); | |
364 | return -1; | |
365 | } | |
a2928c42 | 366 | |
ed52ce2e | 367 | map->map_ip = map->unmap_ip = identity__map_ip; |
2e538c4a ACM |
368 | kernel_maps__insert(map); |
369 | ++kernel_range; | |
370 | } | |
a2928c42 | 371 | |
2e538c4a ACM |
372 | if (filter && filter(map, pos)) { |
373 | delete_symbol: | |
374 | rb_erase(&pos->rb_node, &kernel_map->dso->syms); | |
00a192b3 | 375 | symbol__delete(pos); |
2e538c4a ACM |
376 | } else { |
377 | if (map != kernel_map) { | |
378 | rb_erase(&pos->rb_node, &kernel_map->dso->syms); | |
379 | dso__insert_symbol(map->dso, pos); | |
380 | } | |
9974f496 MG |
381 | count++; |
382 | } | |
a2928c42 ACM |
383 | } |
384 | ||
9974f496 | 385 | return count; |
2e538c4a | 386 | } |
a2928c42 | 387 | |
2e538c4a | 388 | |
6beba7ad | 389 | static int kernel_maps__load_kallsyms(symbol_filter_t filter, int use_modules) |
2e538c4a | 390 | { |
6beba7ad | 391 | if (kernel_maps__load_all_kallsyms()) |
2e538c4a ACM |
392 | return -1; |
393 | ||
394 | dso__fixup_sym_end(kernel_map->dso); | |
395 | ||
396 | return kernel_maps__split_kallsyms(filter, use_modules); | |
a2928c42 ACM |
397 | } |
398 | ||
6beba7ad | 399 | static size_t kernel_maps__fprintf(FILE *fp) |
af427bf5 | 400 | { |
6beba7ad | 401 | size_t printed = fprintf(fp, "Kernel maps:\n"); |
af427bf5 ACM |
402 | struct rb_node *nd; |
403 | ||
af427bf5 ACM |
404 | for (nd = rb_first(&kernel_maps); nd; nd = rb_next(nd)) { |
405 | struct map *pos = rb_entry(nd, struct map, rb_node); | |
406 | ||
2e538c4a | 407 | printed += fprintf(fp, "Map:"); |
af427bf5 | 408 | printed += map__fprintf(pos, fp); |
6beba7ad | 409 | if (verbose > 1) { |
2e538c4a ACM |
410 | printed += dso__fprintf(pos->dso, fp); |
411 | printed += fprintf(fp, "--\n"); | |
412 | } | |
af427bf5 ACM |
413 | } |
414 | ||
6beba7ad | 415 | return printed + fprintf(fp, "END kernel maps\n"); |
af427bf5 ACM |
416 | } |
417 | ||
439d473b | 418 | static int dso__load_perf_map(struct dso *self, struct map *map, |
6beba7ad | 419 | symbol_filter_t filter) |
80d496be PE |
420 | { |
421 | char *line = NULL; | |
422 | size_t n; | |
423 | FILE *file; | |
424 | int nr_syms = 0; | |
425 | ||
439d473b | 426 | file = fopen(self->long_name, "r"); |
80d496be PE |
427 | if (file == NULL) |
428 | goto out_failure; | |
429 | ||
430 | while (!feof(file)) { | |
9cffa8d5 | 431 | u64 start, size; |
80d496be PE |
432 | struct symbol *sym; |
433 | int line_len, len; | |
434 | ||
435 | line_len = getline(&line, &n, file); | |
436 | if (line_len < 0) | |
437 | break; | |
438 | ||
439 | if (!line) | |
440 | goto out_failure; | |
441 | ||
442 | line[--line_len] = '\0'; /* \n */ | |
443 | ||
444 | len = hex2u64(line, &start); | |
445 | ||
446 | len++; | |
447 | if (len + 2 >= line_len) | |
448 | continue; | |
449 | ||
450 | len += hex2u64(line + len, &size); | |
451 | ||
452 | len++; | |
453 | if (len + 2 >= line_len) | |
454 | continue; | |
455 | ||
00a192b3 | 456 | sym = symbol__new(start, size, line + len); |
80d496be PE |
457 | |
458 | if (sym == NULL) | |
459 | goto out_delete_line; | |
460 | ||
439d473b | 461 | if (filter && filter(map, sym)) |
00a192b3 | 462 | symbol__delete(sym); |
80d496be PE |
463 | else { |
464 | dso__insert_symbol(self, sym); | |
465 | nr_syms++; | |
466 | } | |
467 | } | |
468 | ||
469 | free(line); | |
470 | fclose(file); | |
471 | ||
472 | return nr_syms; | |
473 | ||
474 | out_delete_line: | |
475 | free(line); | |
476 | out_failure: | |
477 | return -1; | |
478 | } | |
479 | ||
a2928c42 ACM |
480 | /** |
481 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
482 | * | |
483 | * @self: struct elf_symtab instance to iterate | |
83a0944f | 484 | * @idx: uint32_t idx |
a2928c42 ACM |
485 | * @sym: GElf_Sym iterator |
486 | */ | |
83a0944f IM |
487 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
488 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
489 | idx < nr_syms; \ | |
490 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
491 | |
492 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
493 | { | |
494 | return GELF_ST_TYPE(sym->st_info); | |
495 | } | |
496 | ||
497 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
498 | { | |
499 | return elf_sym__type(sym) == STT_FUNC && | |
500 | sym->st_name != 0 && | |
81833130 | 501 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
502 | } |
503 | ||
6cfcc53e MG |
504 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
505 | { | |
506 | return elf_sym__type(sym) == STT_NOTYPE && | |
507 | sym->st_name != 0 && | |
508 | sym->st_shndx != SHN_UNDEF && | |
509 | sym->st_shndx != SHN_ABS; | |
510 | } | |
511 | ||
512 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
513 | const Elf_Data *secstrs) | |
514 | { | |
515 | return secstrs->d_buf + shdr->sh_name; | |
516 | } | |
517 | ||
518 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
519 | const Elf_Data *secstrs) | |
520 | { | |
521 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
522 | } | |
523 | ||
a2928c42 ACM |
524 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
525 | const Elf_Data *symstrs) | |
526 | { | |
527 | return symstrs->d_buf + sym->st_name; | |
528 | } | |
529 | ||
530 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
531 | GElf_Shdr *shp, const char *name, | |
83a0944f | 532 | size_t *idx) |
a2928c42 ACM |
533 | { |
534 | Elf_Scn *sec = NULL; | |
535 | size_t cnt = 1; | |
536 | ||
537 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
538 | char *str; | |
539 | ||
540 | gelf_getshdr(sec, shp); | |
541 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
542 | if (!strcmp(name, str)) { | |
83a0944f IM |
543 | if (idx) |
544 | *idx = cnt; | |
a2928c42 ACM |
545 | break; |
546 | } | |
547 | ++cnt; | |
548 | } | |
549 | ||
550 | return sec; | |
551 | } | |
552 | ||
8ce998d6 ACM |
553 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
554 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
555 | idx < nr_entries; \ | |
556 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
557 | ||
558 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
559 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
560 | idx < nr_entries; \ | |
561 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
562 | ||
a25e46c4 ACM |
563 | /* |
564 | * We need to check if we have a .dynsym, so that we can handle the | |
565 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
566 | * .dynsym or .symtab). | |
567 | * And always look at the original dso, not at debuginfo packages, that | |
568 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
569 | */ | |
82164161 ACM |
570 | static int dso__synthesize_plt_symbols(struct dso *self, struct map *map, |
571 | symbol_filter_t filter) | |
8ce998d6 ACM |
572 | { |
573 | uint32_t nr_rel_entries, idx; | |
574 | GElf_Sym sym; | |
9cffa8d5 | 575 | u64 plt_offset; |
8ce998d6 ACM |
576 | GElf_Shdr shdr_plt; |
577 | struct symbol *f; | |
a25e46c4 | 578 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 579 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
580 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
581 | size_t dynsym_idx; | |
582 | GElf_Ehdr ehdr; | |
8ce998d6 | 583 | char sympltname[1024]; |
a25e46c4 ACM |
584 | Elf *elf; |
585 | int nr = 0, symidx, fd, err = 0; | |
586 | ||
439d473b | 587 | fd = open(self->long_name, O_RDONLY); |
a25e46c4 ACM |
588 | if (fd < 0) |
589 | goto out; | |
590 | ||
84087126 | 591 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
592 | if (elf == NULL) |
593 | goto out_close; | |
594 | ||
595 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
596 | goto out_elf_end; | |
597 | ||
598 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
599 | ".dynsym", &dynsym_idx); | |
600 | if (scn_dynsym == NULL) | |
601 | goto out_elf_end; | |
8ce998d6 | 602 | |
a25e46c4 | 603 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
604 | ".rela.plt", NULL); |
605 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 606 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
607 | ".rel.plt", NULL); |
608 | if (scn_plt_rel == NULL) | |
a25e46c4 | 609 | goto out_elf_end; |
8ce998d6 ACM |
610 | } |
611 | ||
a25e46c4 ACM |
612 | err = -1; |
613 | ||
8ce998d6 | 614 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 615 | goto out_elf_end; |
8ce998d6 | 616 | |
a25e46c4 ACM |
617 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
618 | goto out_elf_end; | |
8ce998d6 ACM |
619 | |
620 | /* | |
83a0944f | 621 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
622 | * and the symbols in the .dynsym they refer to. |
623 | */ | |
624 | reldata = elf_getdata(scn_plt_rel, NULL); | |
625 | if (reldata == NULL) | |
a25e46c4 | 626 | goto out_elf_end; |
8ce998d6 ACM |
627 | |
628 | syms = elf_getdata(scn_dynsym, NULL); | |
629 | if (syms == NULL) | |
a25e46c4 | 630 | goto out_elf_end; |
8ce998d6 | 631 | |
a25e46c4 | 632 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 633 | if (scn_symstrs == NULL) |
a25e46c4 | 634 | goto out_elf_end; |
8ce998d6 ACM |
635 | |
636 | symstrs = elf_getdata(scn_symstrs, NULL); | |
637 | if (symstrs == NULL) | |
a25e46c4 | 638 | goto out_elf_end; |
8ce998d6 ACM |
639 | |
640 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
641 | plt_offset = shdr_plt.sh_offset; | |
642 | ||
643 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
644 | GElf_Rela pos_mem, *pos; | |
645 | ||
646 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
647 | nr_rel_entries) { | |
648 | symidx = GELF_R_SYM(pos->r_info); | |
649 | plt_offset += shdr_plt.sh_entsize; | |
650 | gelf_getsym(syms, symidx, &sym); | |
651 | snprintf(sympltname, sizeof(sympltname), | |
652 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
653 | ||
654 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 655 | sympltname); |
8ce998d6 | 656 | if (!f) |
a25e46c4 | 657 | goto out_elf_end; |
8ce998d6 | 658 | |
82164161 ACM |
659 | if (filter && filter(map, f)) |
660 | symbol__delete(f); | |
661 | else { | |
662 | dso__insert_symbol(self, f); | |
663 | ++nr; | |
664 | } | |
8ce998d6 ACM |
665 | } |
666 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
667 | GElf_Rel pos_mem, *pos; | |
668 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
669 | nr_rel_entries) { | |
670 | symidx = GELF_R_SYM(pos->r_info); | |
671 | plt_offset += shdr_plt.sh_entsize; | |
672 | gelf_getsym(syms, symidx, &sym); | |
673 | snprintf(sympltname, sizeof(sympltname), | |
674 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
675 | ||
676 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 677 | sympltname); |
8ce998d6 | 678 | if (!f) |
a25e46c4 | 679 | goto out_elf_end; |
8ce998d6 | 680 | |
82164161 ACM |
681 | if (filter && filter(map, f)) |
682 | symbol__delete(f); | |
683 | else { | |
684 | dso__insert_symbol(self, f); | |
685 | ++nr; | |
686 | } | |
8ce998d6 | 687 | } |
8ce998d6 ACM |
688 | } |
689 | ||
a25e46c4 ACM |
690 | err = 0; |
691 | out_elf_end: | |
692 | elf_end(elf); | |
693 | out_close: | |
694 | close(fd); | |
695 | ||
696 | if (err == 0) | |
697 | return nr; | |
698 | out: | |
6beba7ad ACM |
699 | pr_warning("%s: problems reading %s PLT info.\n", |
700 | __func__, self->long_name); | |
a25e46c4 | 701 | return 0; |
8ce998d6 ACM |
702 | } |
703 | ||
439d473b ACM |
704 | static int dso__load_sym(struct dso *self, struct map *map, const char *name, |
705 | int fd, symbol_filter_t filter, int kernel, | |
6beba7ad | 706 | int kmodule) |
a2928c42 | 707 | { |
2e538c4a ACM |
708 | struct map *curr_map = map; |
709 | struct dso *curr_dso = self; | |
710 | size_t dso_name_len = strlen(self->short_name); | |
6cfcc53e | 711 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
712 | uint32_t nr_syms; |
713 | int err = -1; | |
83a0944f | 714 | uint32_t idx; |
a2928c42 ACM |
715 | GElf_Ehdr ehdr; |
716 | GElf_Shdr shdr; | |
717 | Elf_Data *syms; | |
718 | GElf_Sym sym; | |
a25e46c4 | 719 | Elf_Scn *sec, *sec_strndx; |
a2928c42 | 720 | Elf *elf; |
439d473b | 721 | int nr = 0; |
a2928c42 | 722 | |
84087126 | 723 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 724 | if (elf == NULL) { |
6beba7ad | 725 | pr_err("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
726 | goto out_close; |
727 | } | |
728 | ||
729 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
6beba7ad | 730 | pr_err("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
731 | goto out_elf_end; |
732 | } | |
733 | ||
734 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); | |
8ce998d6 | 735 | if (sec == NULL) { |
a25e46c4 ACM |
736 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
737 | if (sec == NULL) | |
8ce998d6 | 738 | goto out_elf_end; |
8ce998d6 | 739 | } |
a2928c42 ACM |
740 | |
741 | syms = elf_getdata(sec, NULL); | |
742 | if (syms == NULL) | |
743 | goto out_elf_end; | |
744 | ||
745 | sec = elf_getscn(elf, shdr.sh_link); | |
746 | if (sec == NULL) | |
747 | goto out_elf_end; | |
748 | ||
749 | symstrs = elf_getdata(sec, NULL); | |
750 | if (symstrs == NULL) | |
751 | goto out_elf_end; | |
752 | ||
6cfcc53e MG |
753 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
754 | if (sec_strndx == NULL) | |
755 | goto out_elf_end; | |
756 | ||
757 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 758 | if (secstrs == NULL) |
6cfcc53e MG |
759 | goto out_elf_end; |
760 | ||
a2928c42 ACM |
761 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
762 | ||
e9fbc9dc | 763 | memset(&sym, 0, sizeof(sym)); |
d20ff6bd MG |
764 | if (!kernel) { |
765 | self->adjust_symbols = (ehdr.e_type == ET_EXEC || | |
30d7a77d ACM |
766 | elf_section_by_name(elf, &ehdr, &shdr, |
767 | ".gnu.prelink_undo", | |
768 | NULL) != NULL); | |
d20ff6bd MG |
769 | } else self->adjust_symbols = 0; |
770 | ||
83a0944f | 771 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 772 | struct symbol *f; |
83a0944f | 773 | const char *elf_name; |
2e538c4a | 774 | char *demangled = NULL; |
6cfcc53e MG |
775 | int is_label = elf_sym__is_label(&sym); |
776 | const char *section_name; | |
a2928c42 | 777 | |
6cfcc53e | 778 | if (!is_label && !elf_sym__is_function(&sym)) |
a2928c42 ACM |
779 | continue; |
780 | ||
781 | sec = elf_getscn(elf, sym.st_shndx); | |
782 | if (!sec) | |
783 | goto out_elf_end; | |
784 | ||
785 | gelf_getshdr(sec, &shdr); | |
6cfcc53e MG |
786 | |
787 | if (is_label && !elf_sec__is_text(&shdr, secstrs)) | |
788 | continue; | |
789 | ||
2e538c4a | 790 | elf_name = elf_sym__name(&sym, symstrs); |
6cfcc53e | 791 | section_name = elf_sec__name(&shdr, secstrs); |
0b73da3f | 792 | |
2e538c4a ACM |
793 | if (kernel || kmodule) { |
794 | char dso_name[PATH_MAX]; | |
795 | ||
796 | if (strcmp(section_name, | |
797 | curr_dso->short_name + dso_name_len) == 0) | |
798 | goto new_symbol; | |
799 | ||
800 | if (strcmp(section_name, ".text") == 0) { | |
801 | curr_map = map; | |
802 | curr_dso = self; | |
803 | goto new_symbol; | |
804 | } | |
805 | ||
806 | snprintf(dso_name, sizeof(dso_name), | |
807 | "%s%s", self->short_name, section_name); | |
808 | ||
809 | curr_map = kernel_maps__find_by_dso_name(dso_name); | |
810 | if (curr_map == NULL) { | |
811 | u64 start = sym.st_value; | |
812 | ||
813 | if (kmodule) | |
814 | start += map->start + shdr.sh_offset; | |
815 | ||
00a192b3 | 816 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
817 | if (curr_dso == NULL) |
818 | goto out_elf_end; | |
819 | curr_map = map__new2(start, curr_dso); | |
820 | if (curr_map == NULL) { | |
821 | dso__delete(curr_dso); | |
822 | goto out_elf_end; | |
823 | } | |
ed52ce2e ACM |
824 | curr_map->map_ip = identity__map_ip; |
825 | curr_map->unmap_ip = identity__map_ip; | |
2e538c4a ACM |
826 | curr_dso->origin = DSO__ORIG_KERNEL; |
827 | kernel_maps__insert(curr_map); | |
828 | dsos__add(curr_dso); | |
829 | } else | |
830 | curr_dso = curr_map->dso; | |
831 | ||
832 | goto new_symbol; | |
af427bf5 ACM |
833 | } |
834 | ||
2e538c4a | 835 | if (curr_dso->adjust_symbols) { |
6beba7ad ACM |
836 | pr_debug2("adjusting symbol: st_value: %Lx sh_addr: " |
837 | "%Lx sh_offset: %Lx\n", (u64)sym.st_value, | |
838 | (u64)shdr.sh_addr, (u64)shdr.sh_offset); | |
f5812a7a | 839 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 840 | } |
28ac909b ACM |
841 | /* |
842 | * We need to figure out if the object was created from C++ sources | |
843 | * DWARF DW_compile_unit has this, but we don't always have access | |
844 | * to it... | |
845 | */ | |
83a0944f | 846 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 847 | if (demangled != NULL) |
83a0944f | 848 | elf_name = demangled; |
2e538c4a | 849 | new_symbol: |
00a192b3 | 850 | f = symbol__new(sym.st_value, sym.st_size, elf_name); |
28ac909b | 851 | free(demangled); |
a2928c42 ACM |
852 | if (!f) |
853 | goto out_elf_end; | |
854 | ||
2e538c4a | 855 | if (filter && filter(curr_map, f)) |
00a192b3 | 856 | symbol__delete(f); |
69ee69f6 | 857 | else { |
2e538c4a | 858 | dso__insert_symbol(curr_dso, f); |
69ee69f6 ACM |
859 | nr++; |
860 | } | |
a2928c42 ACM |
861 | } |
862 | ||
2e538c4a ACM |
863 | /* |
864 | * For misannotated, zeroed, ASM function sizes. | |
865 | */ | |
866 | if (nr > 0) | |
867 | dso__fixup_sym_end(self); | |
a2928c42 ACM |
868 | err = nr; |
869 | out_elf_end: | |
870 | elf_end(elf); | |
871 | out_close: | |
872 | return err; | |
873 | } | |
874 | ||
57f395a7 FW |
875 | bool fetch_build_id_table(struct list_head *head) |
876 | { | |
877 | bool have_buildid = false; | |
878 | struct dso *pos; | |
879 | ||
880 | list_for_each_entry(pos, &dsos, node) { | |
881 | struct build_id_list *new; | |
882 | struct build_id_event b; | |
883 | size_t len; | |
884 | ||
885 | if (filename__read_build_id(pos->long_name, | |
886 | &b.build_id, | |
887 | sizeof(b.build_id)) < 0) | |
888 | continue; | |
889 | have_buildid = true; | |
890 | memset(&b.header, 0, sizeof(b.header)); | |
891 | len = strlen(pos->long_name) + 1; | |
892 | len = ALIGN(len, 64); | |
893 | b.header.size = sizeof(b) + len; | |
894 | ||
895 | new = malloc(sizeof(*new)); | |
896 | if (!new) | |
897 | die("No memory\n"); | |
898 | ||
899 | memcpy(&new->event, &b, sizeof(b)); | |
900 | new->dso_name = pos->long_name; | |
901 | new->len = len; | |
902 | ||
903 | list_add_tail(&new->list, head); | |
904 | } | |
905 | ||
906 | return have_buildid; | |
907 | } | |
908 | ||
2643ce11 | 909 | int filename__read_build_id(const char *filename, void *bf, size_t size) |
4d1e00a8 | 910 | { |
2643ce11 | 911 | int fd, err = -1; |
4d1e00a8 ACM |
912 | GElf_Ehdr ehdr; |
913 | GElf_Shdr shdr; | |
914 | Elf_Data *build_id_data; | |
915 | Elf_Scn *sec; | |
4d1e00a8 | 916 | Elf *elf; |
4d1e00a8 | 917 | |
2643ce11 ACM |
918 | if (size < BUILD_ID_SIZE) |
919 | goto out; | |
920 | ||
921 | fd = open(filename, O_RDONLY); | |
4d1e00a8 ACM |
922 | if (fd < 0) |
923 | goto out; | |
924 | ||
84087126 | 925 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
4d1e00a8 | 926 | if (elf == NULL) { |
8d06367f | 927 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); |
4d1e00a8 ACM |
928 | goto out_close; |
929 | } | |
930 | ||
931 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
6beba7ad | 932 | pr_err("%s: cannot get elf header.\n", __func__); |
4d1e00a8 ACM |
933 | goto out_elf_end; |
934 | } | |
935 | ||
2643ce11 ACM |
936 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
937 | ".note.gnu.build-id", NULL); | |
4d1e00a8 ACM |
938 | if (sec == NULL) |
939 | goto out_elf_end; | |
940 | ||
941 | build_id_data = elf_getdata(sec, NULL); | |
942 | if (build_id_data == NULL) | |
943 | goto out_elf_end; | |
2643ce11 ACM |
944 | memcpy(bf, build_id_data->d_buf + 16, BUILD_ID_SIZE); |
945 | err = BUILD_ID_SIZE; | |
946 | out_elf_end: | |
947 | elf_end(elf); | |
948 | out_close: | |
949 | close(fd); | |
950 | out: | |
951 | return err; | |
952 | } | |
953 | ||
954 | static char *dso__read_build_id(struct dso *self) | |
955 | { | |
8d06367f ACM |
956 | int len; |
957 | char *build_id = NULL; | |
958 | unsigned char rawbf[BUILD_ID_SIZE]; | |
2643ce11 ACM |
959 | |
960 | len = filename__read_build_id(self->long_name, rawbf, sizeof(rawbf)); | |
961 | if (len < 0) | |
962 | goto out; | |
963 | ||
964 | build_id = malloc(len * 2 + 1); | |
4d1e00a8 | 965 | if (build_id == NULL) |
2643ce11 | 966 | goto out; |
4d1e00a8 | 967 | |
8d06367f | 968 | build_id__sprintf(rawbf, len, build_id); |
4d1e00a8 ACM |
969 | out: |
970 | return build_id; | |
971 | } | |
972 | ||
94cb9e38 ACM |
973 | char dso__symtab_origin(const struct dso *self) |
974 | { | |
975 | static const char origin[] = { | |
976 | [DSO__ORIG_KERNEL] = 'k', | |
977 | [DSO__ORIG_JAVA_JIT] = 'j', | |
978 | [DSO__ORIG_FEDORA] = 'f', | |
979 | [DSO__ORIG_UBUNTU] = 'u', | |
980 | [DSO__ORIG_BUILDID] = 'b', | |
981 | [DSO__ORIG_DSO] = 'd', | |
439d473b | 982 | [DSO__ORIG_KMODULE] = 'K', |
94cb9e38 ACM |
983 | }; |
984 | ||
985 | if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND) | |
986 | return '!'; | |
987 | return origin[self->origin]; | |
988 | } | |
989 | ||
6beba7ad | 990 | int dso__load(struct dso *self, struct map *map, symbol_filter_t filter) |
a2928c42 | 991 | { |
4d1e00a8 ACM |
992 | int size = PATH_MAX; |
993 | char *name = malloc(size), *build_id = NULL; | |
a2928c42 ACM |
994 | int ret = -1; |
995 | int fd; | |
996 | ||
8d06367f | 997 | self->loaded = 1; |
66bd8424 | 998 | |
a2928c42 ACM |
999 | if (!name) |
1000 | return -1; | |
1001 | ||
30d7a77d | 1002 | self->adjust_symbols = 0; |
f5812a7a | 1003 | |
94cb9e38 | 1004 | if (strncmp(self->name, "/tmp/perf-", 10) == 0) { |
6beba7ad | 1005 | ret = dso__load_perf_map(self, map, filter); |
94cb9e38 ACM |
1006 | self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : |
1007 | DSO__ORIG_NOT_FOUND; | |
1008 | return ret; | |
1009 | } | |
1010 | ||
1011 | self->origin = DSO__ORIG_FEDORA - 1; | |
80d496be | 1012 | |
a2928c42 ACM |
1013 | more: |
1014 | do { | |
8d06367f ACM |
1015 | int berr = 0; |
1016 | ||
94cb9e38 ACM |
1017 | self->origin++; |
1018 | switch (self->origin) { | |
1019 | case DSO__ORIG_FEDORA: | |
439d473b ACM |
1020 | snprintf(name, size, "/usr/lib/debug%s.debug", |
1021 | self->long_name); | |
a2928c42 | 1022 | break; |
94cb9e38 | 1023 | case DSO__ORIG_UBUNTU: |
439d473b ACM |
1024 | snprintf(name, size, "/usr/lib/debug%s", |
1025 | self->long_name); | |
a2928c42 | 1026 | break; |
94cb9e38 | 1027 | case DSO__ORIG_BUILDID: |
6beba7ad | 1028 | build_id = dso__read_build_id(self); |
4d1e00a8 ACM |
1029 | if (build_id != NULL) { |
1030 | snprintf(name, size, | |
1031 | "/usr/lib/debug/.build-id/%.2s/%s.debug", | |
1032 | build_id, build_id + 2); | |
8d06367f | 1033 | goto compare_build_id; |
4d1e00a8 | 1034 | } |
94cb9e38 | 1035 | self->origin++; |
4d1e00a8 | 1036 | /* Fall thru */ |
94cb9e38 | 1037 | case DSO__ORIG_DSO: |
439d473b | 1038 | snprintf(name, size, "%s", self->long_name); |
a2928c42 ACM |
1039 | break; |
1040 | ||
1041 | default: | |
1042 | goto out; | |
1043 | } | |
a2928c42 | 1044 | |
8d06367f ACM |
1045 | if (self->has_build_id) { |
1046 | bool match; | |
1047 | build_id = malloc(BUILD_ID_SIZE); | |
1048 | if (build_id == NULL) | |
1049 | goto more; | |
1050 | berr = filename__read_build_id(name, build_id, | |
1051 | BUILD_ID_SIZE); | |
1052 | compare_build_id: | |
1053 | match = berr > 0 && memcmp(build_id, self->build_id, | |
1054 | sizeof(self->build_id)) == 0; | |
1055 | free(build_id); | |
1056 | build_id = NULL; | |
1057 | if (!match) | |
1058 | goto more; | |
1059 | } | |
1060 | ||
a2928c42 ACM |
1061 | fd = open(name, O_RDONLY); |
1062 | } while (fd < 0); | |
1063 | ||
6beba7ad | 1064 | ret = dso__load_sym(self, map, name, fd, filter, 0, 0); |
a2928c42 ACM |
1065 | close(fd); |
1066 | ||
1067 | /* | |
1068 | * Some people seem to have debuginfo files _WITHOUT_ debug info!?!? | |
1069 | */ | |
1070 | if (!ret) | |
1071 | goto more; | |
1072 | ||
a25e46c4 | 1073 | if (ret > 0) { |
82164161 | 1074 | int nr_plt = dso__synthesize_plt_symbols(self, map, filter); |
a25e46c4 ACM |
1075 | if (nr_plt > 0) |
1076 | ret += nr_plt; | |
1077 | } | |
a2928c42 ACM |
1078 | out: |
1079 | free(name); | |
1340e6bb ACM |
1080 | if (ret < 0 && strstr(self->name, " (deleted)") != NULL) |
1081 | return 0; | |
a2928c42 ACM |
1082 | return ret; |
1083 | } | |
1084 | ||
439d473b ACM |
1085 | struct map *kernel_map; |
1086 | ||
1087 | static void kernel_maps__insert(struct map *map) | |
6cfcc53e | 1088 | { |
439d473b ACM |
1089 | maps__insert(&kernel_maps, map); |
1090 | } | |
6cfcc53e | 1091 | |
439d473b ACM |
1092 | struct symbol *kernel_maps__find_symbol(u64 ip, struct map **mapp) |
1093 | { | |
439d473b | 1094 | struct map *map = maps__find(&kernel_maps, ip); |
2e538c4a ACM |
1095 | |
1096 | if (mapp) | |
1097 | *mapp = map; | |
439d473b ACM |
1098 | |
1099 | if (map) { | |
1100 | ip = map->map_ip(map, ip); | |
2e538c4a | 1101 | return map->dso->find_symbol(map->dso, ip); |
439d473b | 1102 | } |
6cfcc53e | 1103 | |
2e538c4a | 1104 | return NULL; |
439d473b ACM |
1105 | } |
1106 | ||
1107 | struct map *kernel_maps__find_by_dso_name(const char *name) | |
1108 | { | |
1109 | struct rb_node *nd; | |
1110 | ||
1111 | for (nd = rb_first(&kernel_maps); nd; nd = rb_next(nd)) { | |
1112 | struct map *map = rb_entry(nd, struct map, rb_node); | |
1113 | ||
1114 | if (map->dso && strcmp(map->dso->name, name) == 0) | |
1115 | return map; | |
1116 | } | |
1117 | ||
1118 | return NULL; | |
1119 | } | |
1120 | ||
1121 | static int dso__load_module_sym(struct dso *self, struct map *map, | |
6beba7ad | 1122 | symbol_filter_t filter) |
439d473b ACM |
1123 | { |
1124 | int err = 0, fd = open(self->long_name, O_RDONLY); | |
1125 | ||
8d06367f | 1126 | self->loaded = 1; |
66bd8424 | 1127 | |
439d473b | 1128 | if (fd < 0) { |
6beba7ad | 1129 | pr_err("%s: cannot open %s\n", __func__, self->long_name); |
6cfcc53e | 1130 | return err; |
439d473b | 1131 | } |
6cfcc53e | 1132 | |
6beba7ad | 1133 | err = dso__load_sym(self, map, self->long_name, fd, filter, 0, 1); |
6cfcc53e MG |
1134 | close(fd); |
1135 | ||
1136 | return err; | |
1137 | } | |
1138 | ||
6beba7ad | 1139 | static int dsos__load_modules_sym_dir(char *dirname, symbol_filter_t filter) |
6cfcc53e | 1140 | { |
439d473b ACM |
1141 | struct dirent *dent; |
1142 | int nr_symbols = 0, err; | |
1143 | DIR *dir = opendir(dirname); | |
6cfcc53e | 1144 | |
439d473b | 1145 | if (!dir) { |
6beba7ad | 1146 | pr_err("%s: cannot open %s dir\n", __func__, dirname); |
439d473b ACM |
1147 | return -1; |
1148 | } | |
6cfcc53e | 1149 | |
439d473b ACM |
1150 | while ((dent = readdir(dir)) != NULL) { |
1151 | char path[PATH_MAX]; | |
1152 | ||
1153 | if (dent->d_type == DT_DIR) { | |
1154 | if (!strcmp(dent->d_name, ".") || | |
1155 | !strcmp(dent->d_name, "..")) | |
1156 | continue; | |
1157 | ||
1158 | snprintf(path, sizeof(path), "%s/%s", | |
1159 | dirname, dent->d_name); | |
6beba7ad | 1160 | err = dsos__load_modules_sym_dir(path, filter); |
439d473b ACM |
1161 | if (err < 0) |
1162 | goto failure; | |
1163 | } else { | |
1164 | char *dot = strrchr(dent->d_name, '.'), | |
1165 | dso_name[PATH_MAX]; | |
1166 | struct map *map; | |
1167 | struct rb_node *last; | |
1168 | ||
1169 | if (dot == NULL || strcmp(dot, ".ko")) | |
1170 | continue; | |
1171 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1172 | (int)(dot - dent->d_name), dent->d_name); | |
1173 | ||
a2a99e8e | 1174 | strxfrchar(dso_name, '-', '_'); |
439d473b ACM |
1175 | map = kernel_maps__find_by_dso_name(dso_name); |
1176 | if (map == NULL) | |
1177 | continue; | |
1178 | ||
1179 | snprintf(path, sizeof(path), "%s/%s", | |
1180 | dirname, dent->d_name); | |
1181 | ||
1182 | map->dso->long_name = strdup(path); | |
1183 | if (map->dso->long_name == NULL) | |
1184 | goto failure; | |
1185 | ||
6beba7ad | 1186 | err = dso__load_module_sym(map->dso, map, filter); |
439d473b ACM |
1187 | if (err < 0) |
1188 | goto failure; | |
1189 | last = rb_last(&map->dso->syms); | |
1190 | if (last) { | |
1191 | struct symbol *sym; | |
2e538c4a ACM |
1192 | /* |
1193 | * We do this here as well, even having the | |
1194 | * symbol size found in the symtab because | |
1195 | * misannotated ASM symbols may have the size | |
1196 | * set to zero. | |
1197 | */ | |
1198 | dso__fixup_sym_end(map->dso); | |
1199 | ||
439d473b ACM |
1200 | sym = rb_entry(last, struct symbol, rb_node); |
1201 | map->end = map->start + sym->end; | |
1202 | } | |
1203 | } | |
1204 | nr_symbols += err; | |
1205 | } | |
6cfcc53e | 1206 | |
439d473b ACM |
1207 | return nr_symbols; |
1208 | failure: | |
1209 | closedir(dir); | |
1210 | return -1; | |
1211 | } | |
6cfcc53e | 1212 | |
6beba7ad | 1213 | static int dsos__load_modules_sym(symbol_filter_t filter) |
439d473b ACM |
1214 | { |
1215 | struct utsname uts; | |
1216 | char modules_path[PATH_MAX]; | |
6cfcc53e | 1217 | |
439d473b ACM |
1218 | if (uname(&uts) < 0) |
1219 | return -1; | |
6cfcc53e | 1220 | |
439d473b ACM |
1221 | snprintf(modules_path, sizeof(modules_path), "/lib/modules/%s/kernel", |
1222 | uts.release); | |
6cfcc53e | 1223 | |
6beba7ad | 1224 | return dsos__load_modules_sym_dir(modules_path, filter); |
6cfcc53e MG |
1225 | } |
1226 | ||
439d473b ACM |
1227 | /* |
1228 | * Constructor variant for modules (where we know from /proc/modules where | |
1229 | * they are loaded) and for vmlinux, where only after we load all the | |
1230 | * symbols we'll know where it starts and ends. | |
1231 | */ | |
1232 | static struct map *map__new2(u64 start, struct dso *dso) | |
6cfcc53e | 1233 | { |
439d473b | 1234 | struct map *self = malloc(sizeof(*self)); |
6cfcc53e | 1235 | |
439d473b | 1236 | if (self != NULL) { |
439d473b | 1237 | /* |
afb7b4f0 | 1238 | * ->end will be filled after we load all the symbols |
439d473b | 1239 | */ |
afb7b4f0 | 1240 | map__init(self, start, 0, 0, dso); |
439d473b | 1241 | } |
afb7b4f0 | 1242 | |
439d473b ACM |
1243 | return self; |
1244 | } | |
1245 | ||
00a192b3 | 1246 | static int dsos__load_modules(void) |
439d473b ACM |
1247 | { |
1248 | char *line = NULL; | |
1249 | size_t n; | |
1250 | FILE *file = fopen("/proc/modules", "r"); | |
1251 | struct map *map; | |
6cfcc53e | 1252 | |
439d473b ACM |
1253 | if (file == NULL) |
1254 | return -1; | |
6cfcc53e | 1255 | |
439d473b ACM |
1256 | while (!feof(file)) { |
1257 | char name[PATH_MAX]; | |
1258 | u64 start; | |
1259 | struct dso *dso; | |
1260 | char *sep; | |
1261 | int line_len; | |
6cfcc53e | 1262 | |
439d473b ACM |
1263 | line_len = getline(&line, &n, file); |
1264 | if (line_len < 0) | |
1265 | break; | |
1266 | ||
1267 | if (!line) | |
1268 | goto out_failure; | |
1269 | ||
1270 | line[--line_len] = '\0'; /* \n */ | |
1271 | ||
1272 | sep = strrchr(line, 'x'); | |
1273 | if (sep == NULL) | |
1274 | continue; | |
1275 | ||
1276 | hex2u64(sep + 1, &start); | |
1277 | ||
1278 | sep = strchr(line, ' '); | |
1279 | if (sep == NULL) | |
1280 | continue; | |
1281 | ||
1282 | *sep = '\0'; | |
1283 | ||
1284 | snprintf(name, sizeof(name), "[%s]", line); | |
00a192b3 | 1285 | dso = dso__new(name); |
439d473b ACM |
1286 | |
1287 | if (dso == NULL) | |
1288 | goto out_delete_line; | |
1289 | ||
1290 | map = map__new2(start, dso); | |
1291 | if (map == NULL) { | |
1292 | dso__delete(dso); | |
1293 | goto out_delete_line; | |
6cfcc53e | 1294 | } |
439d473b ACM |
1295 | |
1296 | dso->origin = DSO__ORIG_KMODULE; | |
1297 | kernel_maps__insert(map); | |
1298 | dsos__add(dso); | |
6cfcc53e | 1299 | } |
439d473b ACM |
1300 | |
1301 | free(line); | |
1302 | fclose(file); | |
1303 | ||
af427bf5 | 1304 | return 0; |
439d473b ACM |
1305 | |
1306 | out_delete_line: | |
1307 | free(line); | |
1308 | out_failure: | |
1309 | return -1; | |
6cfcc53e MG |
1310 | } |
1311 | ||
439d473b | 1312 | static int dso__load_vmlinux(struct dso *self, struct map *map, |
6beba7ad | 1313 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 ACM |
1314 | { |
1315 | int err, fd = open(vmlinux, O_RDONLY); | |
1316 | ||
8d06367f | 1317 | self->loaded = 1; |
66bd8424 | 1318 | |
a2928c42 ACM |
1319 | if (fd < 0) |
1320 | return -1; | |
1321 | ||
6beba7ad | 1322 | err = dso__load_sym(self, map, self->long_name, fd, filter, 1, 0); |
6cfcc53e | 1323 | |
a2928c42 ACM |
1324 | close(fd); |
1325 | ||
1326 | return err; | |
1327 | } | |
1328 | ||
00a192b3 ACM |
1329 | int dsos__load_kernel(const char *vmlinux, symbol_filter_t filter, |
1330 | int use_modules) | |
a827c875 ACM |
1331 | { |
1332 | int err = -1; | |
00a192b3 | 1333 | struct dso *dso = dso__new(vmlinux); |
439d473b ACM |
1334 | |
1335 | if (dso == NULL) | |
1336 | return -1; | |
1337 | ||
1338 | dso->short_name = "[kernel]"; | |
1339 | kernel_map = map__new2(0, dso); | |
1340 | if (kernel_map == NULL) | |
1341 | goto out_delete_dso; | |
1342 | ||
ed52ce2e | 1343 | kernel_map->map_ip = kernel_map->unmap_ip = identity__map_ip; |
a827c875 | 1344 | |
00a192b3 | 1345 | if (use_modules && dsos__load_modules() < 0) { |
6beba7ad ACM |
1346 | pr_warning("Failed to load list of modules in use! " |
1347 | "Continuing...\n"); | |
af427bf5 ACM |
1348 | use_modules = 0; |
1349 | } | |
1350 | ||
6cfcc53e | 1351 | if (vmlinux) { |
6beba7ad | 1352 | err = dso__load_vmlinux(dso, kernel_map, vmlinux, filter); |
508c4d08 | 1353 | if (err > 0 && use_modules) { |
6beba7ad | 1354 | int syms = dsos__load_modules_sym(filter); |
508c4d08 | 1355 | |
af427bf5 | 1356 | if (syms < 0) |
6beba7ad ACM |
1357 | pr_warning("Failed to read module symbols!" |
1358 | " Continuing...\n"); | |
af427bf5 ACM |
1359 | else |
1360 | err += syms; | |
508c4d08 | 1361 | } |
6cfcc53e | 1362 | } |
a827c875 | 1363 | |
9974f496 | 1364 | if (err <= 0) |
6beba7ad | 1365 | err = kernel_maps__load_kallsyms(filter, use_modules); |
439d473b ACM |
1366 | |
1367 | if (err > 0) { | |
1368 | struct rb_node *node = rb_first(&dso->syms); | |
1369 | struct symbol *sym = rb_entry(node, struct symbol, rb_node); | |
a827c875 | 1370 | |
439d473b ACM |
1371 | kernel_map->start = sym->start; |
1372 | node = rb_last(&dso->syms); | |
1373 | sym = rb_entry(node, struct symbol, rb_node); | |
1374 | kernel_map->end = sym->end; | |
1375 | ||
1376 | dso->origin = DSO__ORIG_KERNEL; | |
2e538c4a | 1377 | kernel_maps__insert(kernel_map); |
439d473b | 1378 | /* |
2e538c4a ACM |
1379 | * Now that we have all sorted out, just set the ->end of all |
1380 | * maps: | |
439d473b | 1381 | */ |
2e538c4a | 1382 | kernel_maps__fixup_end(); |
439d473b | 1383 | dsos__add(dso); |
af427bf5 | 1384 | |
6beba7ad ACM |
1385 | if (verbose) |
1386 | kernel_maps__fprintf(stderr); | |
439d473b | 1387 | } |
94cb9e38 | 1388 | |
a827c875 | 1389 | return err; |
439d473b ACM |
1390 | |
1391 | out_delete_dso: | |
1392 | dso__delete(dso); | |
1393 | return -1; | |
a827c875 ACM |
1394 | } |
1395 | ||
cd84c2ac | 1396 | LIST_HEAD(dsos); |
cd84c2ac | 1397 | struct dso *vdso; |
cd84c2ac | 1398 | |
83a0944f | 1399 | const char *vmlinux_name = "vmlinux"; |
cd84c2ac FW |
1400 | int modules; |
1401 | ||
1402 | static void dsos__add(struct dso *dso) | |
1403 | { | |
1404 | list_add_tail(&dso->node, &dsos); | |
1405 | } | |
1406 | ||
1407 | static struct dso *dsos__find(const char *name) | |
1408 | { | |
1409 | struct dso *pos; | |
1410 | ||
1411 | list_for_each_entry(pos, &dsos, node) | |
1412 | if (strcmp(pos->name, name) == 0) | |
1413 | return pos; | |
1414 | return NULL; | |
1415 | } | |
1416 | ||
00a192b3 | 1417 | struct dso *dsos__findnew(const char *name) |
cd84c2ac FW |
1418 | { |
1419 | struct dso *dso = dsos__find(name); | |
cd84c2ac | 1420 | |
e4204992 | 1421 | if (!dso) { |
00a192b3 | 1422 | dso = dso__new(name); |
66bd8424 | 1423 | if (dso != NULL) |
e4204992 | 1424 | dsos__add(dso); |
66bd8424 | 1425 | } |
cd84c2ac FW |
1426 | |
1427 | return dso; | |
cd84c2ac FW |
1428 | } |
1429 | ||
1430 | void dsos__fprintf(FILE *fp) | |
1431 | { | |
1432 | struct dso *pos; | |
1433 | ||
1434 | list_for_each_entry(pos, &dsos, node) | |
1435 | dso__fprintf(pos, fp); | |
1436 | } | |
1437 | ||
9e03eb2d ACM |
1438 | size_t dsos__fprintf_buildid(FILE *fp) |
1439 | { | |
1440 | struct dso *pos; | |
1441 | size_t ret = 0; | |
1442 | ||
1443 | list_for_each_entry(pos, &dsos, node) { | |
1444 | ret += dso__fprintf_buildid(pos, fp); | |
1445 | if (verbose) | |
1446 | ret += fprintf(fp, " %s\n", pos->long_name); | |
1447 | else | |
1448 | ret += fprintf(fp, "\n"); | |
1449 | } | |
1450 | return ret; | |
1451 | } | |
1452 | ||
00a192b3 | 1453 | int load_kernel(symbol_filter_t filter) |
cd84c2ac | 1454 | { |
00a192b3 | 1455 | if (dsos__load_kernel(vmlinux_name, filter, modules) <= 0) |
cd84c2ac FW |
1456 | return -1; |
1457 | ||
00a192b3 | 1458 | vdso = dso__new("[vdso]"); |
cd84c2ac FW |
1459 | if (!vdso) |
1460 | return -1; | |
1461 | ||
cd84c2ac FW |
1462 | dsos__add(vdso); |
1463 | ||
439d473b | 1464 | return 0; |
cd84c2ac FW |
1465 | } |
1466 | ||
00a192b3 | 1467 | void symbol__init(unsigned int priv_size) |
a2928c42 ACM |
1468 | { |
1469 | elf_version(EV_CURRENT); | |
00a192b3 | 1470 | symbol__priv_size = priv_size; |
a2928c42 | 1471 | } |