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Commit | Line | Data |
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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> | |
f1617b40 | 12 | #include <limits.h> |
439d473b | 13 | #include <sys/utsname.h> |
2cdbc46d | 14 | |
94cb9e38 ACM |
15 | enum dso_origin { |
16 | DSO__ORIG_KERNEL = 0, | |
17 | DSO__ORIG_JAVA_JIT, | |
18 | DSO__ORIG_FEDORA, | |
19 | DSO__ORIG_UBUNTU, | |
20 | DSO__ORIG_BUILDID, | |
21 | DSO__ORIG_DSO, | |
439d473b | 22 | DSO__ORIG_KMODULE, |
94cb9e38 ACM |
23 | DSO__ORIG_NOT_FOUND, |
24 | }; | |
25 | ||
439d473b ACM |
26 | static void dsos__add(struct dso *dso); |
27 | static struct dso *dsos__find(const char *name); | |
2e538c4a ACM |
28 | static struct map *map__new2(u64 start, struct dso *dso); |
29 | static void kernel_maps__insert(struct map *map); | |
00a192b3 | 30 | unsigned int symbol__priv_size; |
439d473b | 31 | |
af427bf5 ACM |
32 | static struct rb_root kernel_maps; |
33 | ||
2e538c4a | 34 | static void dso__fixup_sym_end(struct dso *self) |
af427bf5 ACM |
35 | { |
36 | struct rb_node *nd, *prevnd = rb_first(&self->syms); | |
2e538c4a | 37 | struct symbol *curr, *prev; |
af427bf5 ACM |
38 | |
39 | if (prevnd == NULL) | |
40 | return; | |
41 | ||
2e538c4a ACM |
42 | curr = rb_entry(prevnd, struct symbol, rb_node); |
43 | ||
af427bf5 | 44 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
45 | prev = curr; |
46 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 ACM |
47 | |
48 | if (prev->end == prev->start) | |
49 | prev->end = curr->start - 1; | |
af427bf5 | 50 | } |
2e538c4a ACM |
51 | |
52 | /* Last entry */ | |
53 | if (curr->end == curr->start) | |
54 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
55 | } |
56 | ||
2e538c4a | 57 | static void kernel_maps__fixup_end(void) |
af427bf5 ACM |
58 | { |
59 | struct map *prev, *curr; | |
60 | struct rb_node *nd, *prevnd = rb_first(&kernel_maps); | |
61 | ||
62 | if (prevnd == NULL) | |
63 | return; | |
64 | ||
65 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
66 | |
67 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
68 | prev = curr; | |
69 | curr = rb_entry(nd, struct map, rb_node); | |
70 | prev->end = curr->start - 1; | |
2e538c4a ACM |
71 | } |
72 | ||
73 | nd = rb_last(&curr->dso->syms); | |
74 | if (nd) { | |
75 | struct symbol *sym = rb_entry(nd, struct symbol, rb_node); | |
76 | curr->end = sym->end; | |
af427bf5 ACM |
77 | } |
78 | } | |
79 | ||
00a192b3 | 80 | static struct symbol *symbol__new(u64 start, u64 len, const char *name) |
a2928c42 | 81 | { |
0085c954 | 82 | size_t namelen = strlen(name) + 1; |
00a192b3 ACM |
83 | struct symbol *self = calloc(1, (symbol__priv_size + |
84 | sizeof(*self) + namelen)); | |
0b73da3f IM |
85 | if (!self) |
86 | return NULL; | |
87 | ||
00a192b3 ACM |
88 | if (symbol__priv_size) { |
89 | memset(self, 0, symbol__priv_size); | |
90 | self = ((void *)self) + symbol__priv_size; | |
a2928c42 | 91 | } |
0b73da3f | 92 | self->start = start; |
6cfcc53e | 93 | self->end = len ? start + len - 1 : start; |
e4204992 | 94 | |
6beba7ad | 95 | pr_debug3("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end); |
e4204992 | 96 | |
0b73da3f | 97 | memcpy(self->name, name, namelen); |
a2928c42 ACM |
98 | |
99 | return self; | |
100 | } | |
101 | ||
00a192b3 | 102 | static void symbol__delete(struct symbol *self) |
a2928c42 | 103 | { |
00a192b3 | 104 | free(((void *)self) - symbol__priv_size); |
a2928c42 ACM |
105 | } |
106 | ||
107 | static size_t symbol__fprintf(struct symbol *self, FILE *fp) | |
108 | { | |
439d473b | 109 | return fprintf(fp, " %llx-%llx %s\n", |
a2928c42 ACM |
110 | self->start, self->end, self->name); |
111 | } | |
112 | ||
cfc10d3b ACM |
113 | static void dso__set_long_name(struct dso *self, char *name) |
114 | { | |
115 | self->long_name = name; | |
116 | self->long_name_len = strlen(name); | |
117 | } | |
118 | ||
119 | static void dso__set_basename(struct dso *self) | |
120 | { | |
121 | self->short_name = basename(self->long_name); | |
122 | } | |
123 | ||
00a192b3 | 124 | struct dso *dso__new(const char *name) |
a2928c42 ACM |
125 | { |
126 | struct dso *self = malloc(sizeof(*self) + strlen(name) + 1); | |
127 | ||
128 | if (self != NULL) { | |
129 | strcpy(self->name, name); | |
cfc10d3b | 130 | dso__set_long_name(self, self->name); |
439d473b | 131 | self->short_name = self->name; |
a2928c42 | 132 | self->syms = RB_ROOT; |
fc54db51 | 133 | self->find_symbol = dso__find_symbol; |
52d422de | 134 | self->slen_calculated = 0; |
94cb9e38 | 135 | self->origin = DSO__ORIG_NOT_FOUND; |
8d06367f ACM |
136 | self->loaded = 0; |
137 | self->has_build_id = 0; | |
a2928c42 ACM |
138 | } |
139 | ||
140 | return self; | |
141 | } | |
142 | ||
143 | static void dso__delete_symbols(struct dso *self) | |
144 | { | |
145 | struct symbol *pos; | |
146 | struct rb_node *next = rb_first(&self->syms); | |
147 | ||
148 | while (next) { | |
149 | pos = rb_entry(next, struct symbol, rb_node); | |
150 | next = rb_next(&pos->rb_node); | |
c8c96525 | 151 | rb_erase(&pos->rb_node, &self->syms); |
00a192b3 | 152 | symbol__delete(pos); |
a2928c42 ACM |
153 | } |
154 | } | |
155 | ||
156 | void dso__delete(struct dso *self) | |
157 | { | |
158 | dso__delete_symbols(self); | |
439d473b ACM |
159 | if (self->long_name != self->name) |
160 | free(self->long_name); | |
a2928c42 ACM |
161 | free(self); |
162 | } | |
163 | ||
8d06367f ACM |
164 | void dso__set_build_id(struct dso *self, void *build_id) |
165 | { | |
166 | memcpy(self->build_id, build_id, sizeof(self->build_id)); | |
167 | self->has_build_id = 1; | |
168 | } | |
169 | ||
a2928c42 ACM |
170 | static void dso__insert_symbol(struct dso *self, struct symbol *sym) |
171 | { | |
172 | struct rb_node **p = &self->syms.rb_node; | |
173 | struct rb_node *parent = NULL; | |
9cffa8d5 | 174 | const u64 ip = sym->start; |
a2928c42 ACM |
175 | struct symbol *s; |
176 | ||
177 | while (*p != NULL) { | |
178 | parent = *p; | |
179 | s = rb_entry(parent, struct symbol, rb_node); | |
180 | if (ip < s->start) | |
181 | p = &(*p)->rb_left; | |
182 | else | |
183 | p = &(*p)->rb_right; | |
184 | } | |
185 | rb_link_node(&sym->rb_node, parent, p); | |
186 | rb_insert_color(&sym->rb_node, &self->syms); | |
187 | } | |
188 | ||
9cffa8d5 | 189 | struct symbol *dso__find_symbol(struct dso *self, u64 ip) |
a2928c42 ACM |
190 | { |
191 | struct rb_node *n; | |
192 | ||
193 | if (self == NULL) | |
194 | return NULL; | |
195 | ||
196 | n = self->syms.rb_node; | |
197 | ||
198 | while (n) { | |
199 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
200 | ||
201 | if (ip < s->start) | |
202 | n = n->rb_left; | |
203 | else if (ip > s->end) | |
204 | n = n->rb_right; | |
205 | else | |
206 | return s; | |
207 | } | |
208 | ||
209 | return NULL; | |
210 | } | |
211 | ||
8d06367f | 212 | int build_id__sprintf(u8 *self, int len, char *bf) |
a2928c42 | 213 | { |
8d06367f ACM |
214 | char *bid = bf; |
215 | u8 *raw = self; | |
216 | int i; | |
a2928c42 | 217 | |
8d06367f ACM |
218 | for (i = 0; i < len; ++i) { |
219 | sprintf(bid, "%02x", *raw); | |
220 | ++raw; | |
221 | bid += 2; | |
222 | } | |
223 | ||
224 | return raw - self; | |
225 | } | |
226 | ||
9e03eb2d | 227 | size_t dso__fprintf_buildid(struct dso *self, FILE *fp) |
8d06367f ACM |
228 | { |
229 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f ACM |
230 | |
231 | build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id); | |
9e03eb2d ACM |
232 | return fprintf(fp, "%s", sbuild_id); |
233 | } | |
234 | ||
235 | size_t dso__fprintf(struct dso *self, FILE *fp) | |
236 | { | |
237 | struct rb_node *nd; | |
238 | size_t ret = fprintf(fp, "dso: %s (", self->short_name); | |
239 | ||
240 | ret += dso__fprintf_buildid(self, fp); | |
241 | ret += fprintf(fp, ")\n"); | |
8d06367f | 242 | |
a2928c42 ACM |
243 | for (nd = rb_first(&self->syms); nd; nd = rb_next(nd)) { |
244 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
245 | ret += symbol__fprintf(pos, fp); | |
246 | } | |
247 | ||
248 | return ret; | |
249 | } | |
250 | ||
2e538c4a ACM |
251 | /* |
252 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
253 | * so that we can in the next step set the symbol ->end address and then | |
254 | * call kernel_maps__split_kallsyms. | |
255 | */ | |
6beba7ad | 256 | static int kernel_maps__load_all_kallsyms(void) |
a2928c42 | 257 | { |
a2928c42 ACM |
258 | char *line = NULL; |
259 | size_t n; | |
260 | FILE *file = fopen("/proc/kallsyms", "r"); | |
261 | ||
262 | if (file == NULL) | |
263 | goto out_failure; | |
264 | ||
265 | while (!feof(file)) { | |
9cffa8d5 | 266 | u64 start; |
a2928c42 ACM |
267 | struct symbol *sym; |
268 | int line_len, len; | |
269 | char symbol_type; | |
2e538c4a | 270 | char *symbol_name; |
a2928c42 ACM |
271 | |
272 | line_len = getline(&line, &n, file); | |
273 | if (line_len < 0) | |
274 | break; | |
275 | ||
276 | if (!line) | |
277 | goto out_failure; | |
278 | ||
279 | line[--line_len] = '\0'; /* \n */ | |
280 | ||
a0055ae2 | 281 | len = hex2u64(line, &start); |
a2928c42 ACM |
282 | |
283 | len++; | |
284 | if (len + 2 >= line_len) | |
285 | continue; | |
286 | ||
287 | symbol_type = toupper(line[len]); | |
288 | /* | |
289 | * We're interested only in code ('T'ext) | |
290 | */ | |
291 | if (symbol_type != 'T' && symbol_type != 'W') | |
292 | continue; | |
af427bf5 ACM |
293 | |
294 | symbol_name = line + len + 2; | |
2e538c4a ACM |
295 | /* |
296 | * Will fix up the end later, when we have all symbols sorted. | |
297 | */ | |
00a192b3 | 298 | sym = symbol__new(start, 0, symbol_name); |
af427bf5 | 299 | |
2e538c4a ACM |
300 | if (sym == NULL) |
301 | goto out_delete_line; | |
302 | ||
82164161 ACM |
303 | /* |
304 | * We will pass the symbols to the filter later, in | |
305 | * kernel_maps__split_kallsyms, when we have split the | |
306 | * maps per module | |
307 | */ | |
2e538c4a ACM |
308 | dso__insert_symbol(kernel_map->dso, sym); |
309 | } | |
310 | ||
311 | free(line); | |
312 | fclose(file); | |
313 | ||
314 | return 0; | |
315 | ||
316 | out_delete_line: | |
317 | free(line); | |
318 | out_failure: | |
319 | return -1; | |
320 | } | |
321 | ||
322 | /* | |
323 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
324 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
325 | * the original ELF section names vmlinux have. | |
326 | */ | |
327 | static int kernel_maps__split_kallsyms(symbol_filter_t filter, int use_modules) | |
328 | { | |
329 | struct map *map = kernel_map; | |
330 | struct symbol *pos; | |
331 | int count = 0; | |
332 | struct rb_node *next = rb_first(&kernel_map->dso->syms); | |
333 | int kernel_range = 0; | |
334 | ||
335 | while (next) { | |
336 | char *module; | |
337 | ||
338 | pos = rb_entry(next, struct symbol, rb_node); | |
339 | next = rb_next(&pos->rb_node); | |
340 | ||
341 | module = strchr(pos->name, '\t'); | |
342 | if (module) { | |
af427bf5 | 343 | if (!use_modules) |
2e538c4a ACM |
344 | goto delete_symbol; |
345 | ||
346 | *module++ = '\0'; | |
347 | ||
af427bf5 ACM |
348 | if (strcmp(map->dso->name, module)) { |
349 | map = kernel_maps__find_by_dso_name(module); | |
350 | if (!map) { | |
6beba7ad ACM |
351 | pr_err("/proc/{kallsyms,modules} " |
352 | "inconsistency!\n"); | |
af427bf5 ACM |
353 | return -1; |
354 | } | |
355 | } | |
2e538c4a ACM |
356 | /* |
357 | * So that we look just like we get from .ko files, | |
358 | * i.e. not prelinked, relative to map->start. | |
359 | */ | |
360 | pos->start = map->map_ip(map, pos->start); | |
361 | pos->end = map->map_ip(map, pos->end); | |
362 | } else if (map != kernel_map) { | |
363 | char dso_name[PATH_MAX]; | |
364 | struct dso *dso; | |
365 | ||
366 | snprintf(dso_name, sizeof(dso_name), "[kernel].%d", | |
367 | kernel_range++); | |
368 | ||
00a192b3 | 369 | dso = dso__new(dso_name); |
2e538c4a ACM |
370 | if (dso == NULL) |
371 | return -1; | |
372 | ||
373 | map = map__new2(pos->start, dso); | |
374 | if (map == NULL) { | |
375 | dso__delete(dso); | |
376 | return -1; | |
377 | } | |
a2928c42 | 378 | |
ed52ce2e | 379 | map->map_ip = map->unmap_ip = identity__map_ip; |
2e538c4a ACM |
380 | kernel_maps__insert(map); |
381 | ++kernel_range; | |
382 | } | |
a2928c42 | 383 | |
2e538c4a ACM |
384 | if (filter && filter(map, pos)) { |
385 | delete_symbol: | |
386 | rb_erase(&pos->rb_node, &kernel_map->dso->syms); | |
00a192b3 | 387 | symbol__delete(pos); |
2e538c4a ACM |
388 | } else { |
389 | if (map != kernel_map) { | |
390 | rb_erase(&pos->rb_node, &kernel_map->dso->syms); | |
391 | dso__insert_symbol(map->dso, pos); | |
392 | } | |
9974f496 MG |
393 | count++; |
394 | } | |
a2928c42 ACM |
395 | } |
396 | ||
9974f496 | 397 | return count; |
2e538c4a | 398 | } |
a2928c42 | 399 | |
2e538c4a | 400 | |
6beba7ad | 401 | static int kernel_maps__load_kallsyms(symbol_filter_t filter, int use_modules) |
2e538c4a | 402 | { |
6beba7ad | 403 | if (kernel_maps__load_all_kallsyms()) |
2e538c4a ACM |
404 | return -1; |
405 | ||
406 | dso__fixup_sym_end(kernel_map->dso); | |
407 | ||
408 | return kernel_maps__split_kallsyms(filter, use_modules); | |
a2928c42 ACM |
409 | } |
410 | ||
6beba7ad | 411 | static size_t kernel_maps__fprintf(FILE *fp) |
af427bf5 | 412 | { |
6beba7ad | 413 | size_t printed = fprintf(fp, "Kernel maps:\n"); |
af427bf5 ACM |
414 | struct rb_node *nd; |
415 | ||
af427bf5 ACM |
416 | for (nd = rb_first(&kernel_maps); nd; nd = rb_next(nd)) { |
417 | struct map *pos = rb_entry(nd, struct map, rb_node); | |
418 | ||
2e538c4a | 419 | printed += fprintf(fp, "Map:"); |
af427bf5 | 420 | printed += map__fprintf(pos, fp); |
6beba7ad | 421 | if (verbose > 1) { |
2e538c4a ACM |
422 | printed += dso__fprintf(pos->dso, fp); |
423 | printed += fprintf(fp, "--\n"); | |
424 | } | |
af427bf5 ACM |
425 | } |
426 | ||
6beba7ad | 427 | return printed + fprintf(fp, "END kernel maps\n"); |
af427bf5 ACM |
428 | } |
429 | ||
439d473b | 430 | static int dso__load_perf_map(struct dso *self, struct map *map, |
6beba7ad | 431 | symbol_filter_t filter) |
80d496be PE |
432 | { |
433 | char *line = NULL; | |
434 | size_t n; | |
435 | FILE *file; | |
436 | int nr_syms = 0; | |
437 | ||
439d473b | 438 | file = fopen(self->long_name, "r"); |
80d496be PE |
439 | if (file == NULL) |
440 | goto out_failure; | |
441 | ||
442 | while (!feof(file)) { | |
9cffa8d5 | 443 | u64 start, size; |
80d496be PE |
444 | struct symbol *sym; |
445 | int line_len, len; | |
446 | ||
447 | line_len = getline(&line, &n, file); | |
448 | if (line_len < 0) | |
449 | break; | |
450 | ||
451 | if (!line) | |
452 | goto out_failure; | |
453 | ||
454 | line[--line_len] = '\0'; /* \n */ | |
455 | ||
456 | len = hex2u64(line, &start); | |
457 | ||
458 | len++; | |
459 | if (len + 2 >= line_len) | |
460 | continue; | |
461 | ||
462 | len += hex2u64(line + len, &size); | |
463 | ||
464 | len++; | |
465 | if (len + 2 >= line_len) | |
466 | continue; | |
467 | ||
00a192b3 | 468 | sym = symbol__new(start, size, line + len); |
80d496be PE |
469 | |
470 | if (sym == NULL) | |
471 | goto out_delete_line; | |
472 | ||
439d473b | 473 | if (filter && filter(map, sym)) |
00a192b3 | 474 | symbol__delete(sym); |
80d496be PE |
475 | else { |
476 | dso__insert_symbol(self, sym); | |
477 | nr_syms++; | |
478 | } | |
479 | } | |
480 | ||
481 | free(line); | |
482 | fclose(file); | |
483 | ||
484 | return nr_syms; | |
485 | ||
486 | out_delete_line: | |
487 | free(line); | |
488 | out_failure: | |
489 | return -1; | |
490 | } | |
491 | ||
a2928c42 ACM |
492 | /** |
493 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
494 | * | |
495 | * @self: struct elf_symtab instance to iterate | |
83a0944f | 496 | * @idx: uint32_t idx |
a2928c42 ACM |
497 | * @sym: GElf_Sym iterator |
498 | */ | |
83a0944f IM |
499 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
500 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
501 | idx < nr_syms; \ | |
502 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
503 | |
504 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
505 | { | |
506 | return GELF_ST_TYPE(sym->st_info); | |
507 | } | |
508 | ||
509 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
510 | { | |
511 | return elf_sym__type(sym) == STT_FUNC && | |
512 | sym->st_name != 0 && | |
81833130 | 513 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
514 | } |
515 | ||
6cfcc53e MG |
516 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
517 | { | |
518 | return elf_sym__type(sym) == STT_NOTYPE && | |
519 | sym->st_name != 0 && | |
520 | sym->st_shndx != SHN_UNDEF && | |
521 | sym->st_shndx != SHN_ABS; | |
522 | } | |
523 | ||
524 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
525 | const Elf_Data *secstrs) | |
526 | { | |
527 | return secstrs->d_buf + shdr->sh_name; | |
528 | } | |
529 | ||
530 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
531 | const Elf_Data *secstrs) | |
532 | { | |
533 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
534 | } | |
535 | ||
a2928c42 ACM |
536 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
537 | const Elf_Data *symstrs) | |
538 | { | |
539 | return symstrs->d_buf + sym->st_name; | |
540 | } | |
541 | ||
542 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
543 | GElf_Shdr *shp, const char *name, | |
83a0944f | 544 | size_t *idx) |
a2928c42 ACM |
545 | { |
546 | Elf_Scn *sec = NULL; | |
547 | size_t cnt = 1; | |
548 | ||
549 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
550 | char *str; | |
551 | ||
552 | gelf_getshdr(sec, shp); | |
553 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
554 | if (!strcmp(name, str)) { | |
83a0944f IM |
555 | if (idx) |
556 | *idx = cnt; | |
a2928c42 ACM |
557 | break; |
558 | } | |
559 | ++cnt; | |
560 | } | |
561 | ||
562 | return sec; | |
563 | } | |
564 | ||
8ce998d6 ACM |
565 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
566 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
567 | idx < nr_entries; \ | |
568 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
569 | ||
570 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
571 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
572 | idx < nr_entries; \ | |
573 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
574 | ||
a25e46c4 ACM |
575 | /* |
576 | * We need to check if we have a .dynsym, so that we can handle the | |
577 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
578 | * .dynsym or .symtab). | |
579 | * And always look at the original dso, not at debuginfo packages, that | |
580 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
581 | */ | |
82164161 ACM |
582 | static int dso__synthesize_plt_symbols(struct dso *self, struct map *map, |
583 | symbol_filter_t filter) | |
8ce998d6 ACM |
584 | { |
585 | uint32_t nr_rel_entries, idx; | |
586 | GElf_Sym sym; | |
9cffa8d5 | 587 | u64 plt_offset; |
8ce998d6 ACM |
588 | GElf_Shdr shdr_plt; |
589 | struct symbol *f; | |
a25e46c4 | 590 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 591 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
592 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
593 | size_t dynsym_idx; | |
594 | GElf_Ehdr ehdr; | |
8ce998d6 | 595 | char sympltname[1024]; |
a25e46c4 ACM |
596 | Elf *elf; |
597 | int nr = 0, symidx, fd, err = 0; | |
598 | ||
439d473b | 599 | fd = open(self->long_name, O_RDONLY); |
a25e46c4 ACM |
600 | if (fd < 0) |
601 | goto out; | |
602 | ||
84087126 | 603 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
604 | if (elf == NULL) |
605 | goto out_close; | |
606 | ||
607 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
608 | goto out_elf_end; | |
609 | ||
610 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
611 | ".dynsym", &dynsym_idx); | |
612 | if (scn_dynsym == NULL) | |
613 | goto out_elf_end; | |
8ce998d6 | 614 | |
a25e46c4 | 615 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
616 | ".rela.plt", NULL); |
617 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 618 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
619 | ".rel.plt", NULL); |
620 | if (scn_plt_rel == NULL) | |
a25e46c4 | 621 | goto out_elf_end; |
8ce998d6 ACM |
622 | } |
623 | ||
a25e46c4 ACM |
624 | err = -1; |
625 | ||
8ce998d6 | 626 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 627 | goto out_elf_end; |
8ce998d6 | 628 | |
a25e46c4 ACM |
629 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
630 | goto out_elf_end; | |
8ce998d6 ACM |
631 | |
632 | /* | |
83a0944f | 633 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
634 | * and the symbols in the .dynsym they refer to. |
635 | */ | |
636 | reldata = elf_getdata(scn_plt_rel, NULL); | |
637 | if (reldata == NULL) | |
a25e46c4 | 638 | goto out_elf_end; |
8ce998d6 ACM |
639 | |
640 | syms = elf_getdata(scn_dynsym, NULL); | |
641 | if (syms == NULL) | |
a25e46c4 | 642 | goto out_elf_end; |
8ce998d6 | 643 | |
a25e46c4 | 644 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 645 | if (scn_symstrs == NULL) |
a25e46c4 | 646 | goto out_elf_end; |
8ce998d6 ACM |
647 | |
648 | symstrs = elf_getdata(scn_symstrs, NULL); | |
649 | if (symstrs == NULL) | |
a25e46c4 | 650 | goto out_elf_end; |
8ce998d6 ACM |
651 | |
652 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
653 | plt_offset = shdr_plt.sh_offset; | |
654 | ||
655 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
656 | GElf_Rela pos_mem, *pos; | |
657 | ||
658 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
659 | nr_rel_entries) { | |
660 | symidx = GELF_R_SYM(pos->r_info); | |
661 | plt_offset += shdr_plt.sh_entsize; | |
662 | gelf_getsym(syms, symidx, &sym); | |
663 | snprintf(sympltname, sizeof(sympltname), | |
664 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
665 | ||
666 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 667 | sympltname); |
8ce998d6 | 668 | if (!f) |
a25e46c4 | 669 | goto out_elf_end; |
8ce998d6 | 670 | |
82164161 ACM |
671 | if (filter && filter(map, f)) |
672 | symbol__delete(f); | |
673 | else { | |
674 | dso__insert_symbol(self, f); | |
675 | ++nr; | |
676 | } | |
8ce998d6 ACM |
677 | } |
678 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
679 | GElf_Rel pos_mem, *pos; | |
680 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
681 | nr_rel_entries) { | |
682 | symidx = GELF_R_SYM(pos->r_info); | |
683 | plt_offset += shdr_plt.sh_entsize; | |
684 | gelf_getsym(syms, symidx, &sym); | |
685 | snprintf(sympltname, sizeof(sympltname), | |
686 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
687 | ||
688 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 689 | sympltname); |
8ce998d6 | 690 | if (!f) |
a25e46c4 | 691 | goto out_elf_end; |
8ce998d6 | 692 | |
82164161 ACM |
693 | if (filter && filter(map, f)) |
694 | symbol__delete(f); | |
695 | else { | |
696 | dso__insert_symbol(self, f); | |
697 | ++nr; | |
698 | } | |
8ce998d6 | 699 | } |
8ce998d6 ACM |
700 | } |
701 | ||
a25e46c4 ACM |
702 | err = 0; |
703 | out_elf_end: | |
704 | elf_end(elf); | |
705 | out_close: | |
706 | close(fd); | |
707 | ||
708 | if (err == 0) | |
709 | return nr; | |
710 | out: | |
6beba7ad ACM |
711 | pr_warning("%s: problems reading %s PLT info.\n", |
712 | __func__, self->long_name); | |
a25e46c4 | 713 | return 0; |
8ce998d6 ACM |
714 | } |
715 | ||
439d473b ACM |
716 | static int dso__load_sym(struct dso *self, struct map *map, const char *name, |
717 | int fd, symbol_filter_t filter, int kernel, | |
6beba7ad | 718 | int kmodule) |
a2928c42 | 719 | { |
2e538c4a ACM |
720 | struct map *curr_map = map; |
721 | struct dso *curr_dso = self; | |
722 | size_t dso_name_len = strlen(self->short_name); | |
6cfcc53e | 723 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
724 | uint32_t nr_syms; |
725 | int err = -1; | |
83a0944f | 726 | uint32_t idx; |
a2928c42 ACM |
727 | GElf_Ehdr ehdr; |
728 | GElf_Shdr shdr; | |
729 | Elf_Data *syms; | |
730 | GElf_Sym sym; | |
a25e46c4 | 731 | Elf_Scn *sec, *sec_strndx; |
a2928c42 | 732 | Elf *elf; |
439d473b | 733 | int nr = 0; |
a2928c42 | 734 | |
84087126 | 735 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 736 | if (elf == NULL) { |
6beba7ad | 737 | pr_err("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
738 | goto out_close; |
739 | } | |
740 | ||
741 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
6beba7ad | 742 | pr_err("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
743 | goto out_elf_end; |
744 | } | |
745 | ||
746 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); | |
8ce998d6 | 747 | if (sec == NULL) { |
a25e46c4 ACM |
748 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
749 | if (sec == NULL) | |
8ce998d6 | 750 | goto out_elf_end; |
8ce998d6 | 751 | } |
a2928c42 ACM |
752 | |
753 | syms = elf_getdata(sec, NULL); | |
754 | if (syms == NULL) | |
755 | goto out_elf_end; | |
756 | ||
757 | sec = elf_getscn(elf, shdr.sh_link); | |
758 | if (sec == NULL) | |
759 | goto out_elf_end; | |
760 | ||
761 | symstrs = elf_getdata(sec, NULL); | |
762 | if (symstrs == NULL) | |
763 | goto out_elf_end; | |
764 | ||
6cfcc53e MG |
765 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
766 | if (sec_strndx == NULL) | |
767 | goto out_elf_end; | |
768 | ||
769 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 770 | if (secstrs == NULL) |
6cfcc53e MG |
771 | goto out_elf_end; |
772 | ||
a2928c42 ACM |
773 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
774 | ||
e9fbc9dc | 775 | memset(&sym, 0, sizeof(sym)); |
d20ff6bd MG |
776 | if (!kernel) { |
777 | self->adjust_symbols = (ehdr.e_type == ET_EXEC || | |
30d7a77d ACM |
778 | elf_section_by_name(elf, &ehdr, &shdr, |
779 | ".gnu.prelink_undo", | |
780 | NULL) != NULL); | |
d20ff6bd MG |
781 | } else self->adjust_symbols = 0; |
782 | ||
83a0944f | 783 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 784 | struct symbol *f; |
83a0944f | 785 | const char *elf_name; |
2e538c4a | 786 | char *demangled = NULL; |
6cfcc53e MG |
787 | int is_label = elf_sym__is_label(&sym); |
788 | const char *section_name; | |
a2928c42 | 789 | |
6cfcc53e | 790 | if (!is_label && !elf_sym__is_function(&sym)) |
a2928c42 ACM |
791 | continue; |
792 | ||
793 | sec = elf_getscn(elf, sym.st_shndx); | |
794 | if (!sec) | |
795 | goto out_elf_end; | |
796 | ||
797 | gelf_getshdr(sec, &shdr); | |
6cfcc53e MG |
798 | |
799 | if (is_label && !elf_sec__is_text(&shdr, secstrs)) | |
800 | continue; | |
801 | ||
2e538c4a | 802 | elf_name = elf_sym__name(&sym, symstrs); |
6cfcc53e | 803 | section_name = elf_sec__name(&shdr, secstrs); |
0b73da3f | 804 | |
2e538c4a ACM |
805 | if (kernel || kmodule) { |
806 | char dso_name[PATH_MAX]; | |
807 | ||
808 | if (strcmp(section_name, | |
809 | curr_dso->short_name + dso_name_len) == 0) | |
810 | goto new_symbol; | |
811 | ||
812 | if (strcmp(section_name, ".text") == 0) { | |
813 | curr_map = map; | |
814 | curr_dso = self; | |
815 | goto new_symbol; | |
816 | } | |
817 | ||
818 | snprintf(dso_name, sizeof(dso_name), | |
819 | "%s%s", self->short_name, section_name); | |
820 | ||
821 | curr_map = kernel_maps__find_by_dso_name(dso_name); | |
822 | if (curr_map == NULL) { | |
823 | u64 start = sym.st_value; | |
824 | ||
825 | if (kmodule) | |
826 | start += map->start + shdr.sh_offset; | |
827 | ||
00a192b3 | 828 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
829 | if (curr_dso == NULL) |
830 | goto out_elf_end; | |
831 | curr_map = map__new2(start, curr_dso); | |
832 | if (curr_map == NULL) { | |
833 | dso__delete(curr_dso); | |
834 | goto out_elf_end; | |
835 | } | |
ed52ce2e ACM |
836 | curr_map->map_ip = identity__map_ip; |
837 | curr_map->unmap_ip = identity__map_ip; | |
2e538c4a ACM |
838 | curr_dso->origin = DSO__ORIG_KERNEL; |
839 | kernel_maps__insert(curr_map); | |
840 | dsos__add(curr_dso); | |
841 | } else | |
842 | curr_dso = curr_map->dso; | |
843 | ||
844 | goto new_symbol; | |
af427bf5 ACM |
845 | } |
846 | ||
2e538c4a | 847 | if (curr_dso->adjust_symbols) { |
6beba7ad ACM |
848 | pr_debug2("adjusting symbol: st_value: %Lx sh_addr: " |
849 | "%Lx sh_offset: %Lx\n", (u64)sym.st_value, | |
850 | (u64)shdr.sh_addr, (u64)shdr.sh_offset); | |
f5812a7a | 851 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 852 | } |
28ac909b ACM |
853 | /* |
854 | * We need to figure out if the object was created from C++ sources | |
855 | * DWARF DW_compile_unit has this, but we don't always have access | |
856 | * to it... | |
857 | */ | |
83a0944f | 858 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 859 | if (demangled != NULL) |
83a0944f | 860 | elf_name = demangled; |
2e538c4a | 861 | new_symbol: |
00a192b3 | 862 | f = symbol__new(sym.st_value, sym.st_size, elf_name); |
28ac909b | 863 | free(demangled); |
a2928c42 ACM |
864 | if (!f) |
865 | goto out_elf_end; | |
866 | ||
2e538c4a | 867 | if (filter && filter(curr_map, f)) |
00a192b3 | 868 | symbol__delete(f); |
69ee69f6 | 869 | else { |
2e538c4a | 870 | dso__insert_symbol(curr_dso, f); |
69ee69f6 ACM |
871 | nr++; |
872 | } | |
a2928c42 ACM |
873 | } |
874 | ||
2e538c4a ACM |
875 | /* |
876 | * For misannotated, zeroed, ASM function sizes. | |
877 | */ | |
878 | if (nr > 0) | |
879 | dso__fixup_sym_end(self); | |
a2928c42 ACM |
880 | err = nr; |
881 | out_elf_end: | |
882 | elf_end(elf); | |
883 | out_close: | |
884 | return err; | |
885 | } | |
886 | ||
e30a3d12 | 887 | bool dsos__read_build_ids(void) |
57f395a7 | 888 | { |
e30a3d12 | 889 | bool have_build_id = false; |
57f395a7 FW |
890 | struct dso *pos; |
891 | ||
e30a3d12 ACM |
892 | list_for_each_entry(pos, &dsos, node) |
893 | if (filename__read_build_id(pos->long_name, pos->build_id, | |
894 | sizeof(pos->build_id)) > 0) { | |
895 | have_build_id = true; | |
896 | pos->has_build_id = true; | |
897 | } | |
57f395a7 | 898 | |
e30a3d12 | 899 | return have_build_id; |
57f395a7 FW |
900 | } |
901 | ||
2643ce11 | 902 | int filename__read_build_id(const char *filename, void *bf, size_t size) |
4d1e00a8 | 903 | { |
2643ce11 | 904 | int fd, err = -1; |
4d1e00a8 ACM |
905 | GElf_Ehdr ehdr; |
906 | GElf_Shdr shdr; | |
907 | Elf_Data *build_id_data; | |
908 | Elf_Scn *sec; | |
4d1e00a8 | 909 | Elf *elf; |
4d1e00a8 | 910 | |
2643ce11 ACM |
911 | if (size < BUILD_ID_SIZE) |
912 | goto out; | |
913 | ||
914 | fd = open(filename, O_RDONLY); | |
4d1e00a8 ACM |
915 | if (fd < 0) |
916 | goto out; | |
917 | ||
84087126 | 918 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
4d1e00a8 | 919 | if (elf == NULL) { |
8d06367f | 920 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); |
4d1e00a8 ACM |
921 | goto out_close; |
922 | } | |
923 | ||
924 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
6beba7ad | 925 | pr_err("%s: cannot get elf header.\n", __func__); |
4d1e00a8 ACM |
926 | goto out_elf_end; |
927 | } | |
928 | ||
2643ce11 ACM |
929 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
930 | ".note.gnu.build-id", NULL); | |
4d1e00a8 ACM |
931 | if (sec == NULL) |
932 | goto out_elf_end; | |
933 | ||
934 | build_id_data = elf_getdata(sec, NULL); | |
935 | if (build_id_data == NULL) | |
936 | goto out_elf_end; | |
2643ce11 ACM |
937 | memcpy(bf, build_id_data->d_buf + 16, BUILD_ID_SIZE); |
938 | err = BUILD_ID_SIZE; | |
939 | out_elf_end: | |
940 | elf_end(elf); | |
941 | out_close: | |
942 | close(fd); | |
943 | out: | |
944 | return err; | |
945 | } | |
946 | ||
f1617b40 ACM |
947 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
948 | { | |
949 | int fd, err = -1; | |
950 | ||
951 | if (size < BUILD_ID_SIZE) | |
952 | goto out; | |
953 | ||
954 | fd = open(filename, O_RDONLY); | |
955 | if (fd < 0) | |
956 | goto out; | |
957 | ||
958 | while (1) { | |
959 | char bf[BUFSIZ]; | |
960 | GElf_Nhdr nhdr; | |
961 | int namesz, descsz; | |
962 | ||
963 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
964 | break; | |
965 | ||
966 | namesz = (nhdr.n_namesz + 3) & -4U; | |
967 | descsz = (nhdr.n_descsz + 3) & -4U; | |
968 | if (nhdr.n_type == NT_GNU_BUILD_ID && | |
969 | nhdr.n_namesz == sizeof("GNU")) { | |
970 | if (read(fd, bf, namesz) != namesz) | |
971 | break; | |
972 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
973 | if (read(fd, build_id, | |
974 | BUILD_ID_SIZE) == BUILD_ID_SIZE) { | |
975 | err = 0; | |
976 | break; | |
977 | } | |
978 | } else if (read(fd, bf, descsz) != descsz) | |
979 | break; | |
980 | } else { | |
981 | int n = namesz + descsz; | |
982 | if (read(fd, bf, n) != n) | |
983 | break; | |
984 | } | |
985 | } | |
986 | close(fd); | |
987 | out: | |
988 | return err; | |
989 | } | |
990 | ||
94cb9e38 ACM |
991 | char dso__symtab_origin(const struct dso *self) |
992 | { | |
993 | static const char origin[] = { | |
994 | [DSO__ORIG_KERNEL] = 'k', | |
995 | [DSO__ORIG_JAVA_JIT] = 'j', | |
996 | [DSO__ORIG_FEDORA] = 'f', | |
997 | [DSO__ORIG_UBUNTU] = 'u', | |
998 | [DSO__ORIG_BUILDID] = 'b', | |
999 | [DSO__ORIG_DSO] = 'd', | |
439d473b | 1000 | [DSO__ORIG_KMODULE] = 'K', |
94cb9e38 ACM |
1001 | }; |
1002 | ||
1003 | if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND) | |
1004 | return '!'; | |
1005 | return origin[self->origin]; | |
1006 | } | |
1007 | ||
6beba7ad | 1008 | int dso__load(struct dso *self, struct map *map, symbol_filter_t filter) |
a2928c42 | 1009 | { |
4d1e00a8 | 1010 | int size = PATH_MAX; |
d3379ab9 ACM |
1011 | char *name = malloc(size); |
1012 | u8 build_id[BUILD_ID_SIZE]; | |
a2928c42 ACM |
1013 | int ret = -1; |
1014 | int fd; | |
1015 | ||
8d06367f | 1016 | self->loaded = 1; |
66bd8424 | 1017 | |
a2928c42 ACM |
1018 | if (!name) |
1019 | return -1; | |
1020 | ||
30d7a77d | 1021 | self->adjust_symbols = 0; |
f5812a7a | 1022 | |
94cb9e38 | 1023 | if (strncmp(self->name, "/tmp/perf-", 10) == 0) { |
6beba7ad | 1024 | ret = dso__load_perf_map(self, map, filter); |
94cb9e38 ACM |
1025 | self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : |
1026 | DSO__ORIG_NOT_FOUND; | |
1027 | return ret; | |
1028 | } | |
1029 | ||
1030 | self->origin = DSO__ORIG_FEDORA - 1; | |
80d496be | 1031 | |
a2928c42 ACM |
1032 | more: |
1033 | do { | |
94cb9e38 ACM |
1034 | self->origin++; |
1035 | switch (self->origin) { | |
1036 | case DSO__ORIG_FEDORA: | |
439d473b ACM |
1037 | snprintf(name, size, "/usr/lib/debug%s.debug", |
1038 | self->long_name); | |
a2928c42 | 1039 | break; |
94cb9e38 | 1040 | case DSO__ORIG_UBUNTU: |
439d473b ACM |
1041 | snprintf(name, size, "/usr/lib/debug%s", |
1042 | self->long_name); | |
a2928c42 | 1043 | break; |
94cb9e38 | 1044 | case DSO__ORIG_BUILDID: |
d3379ab9 ACM |
1045 | if (filename__read_build_id(self->long_name, build_id, |
1046 | sizeof(build_id))) { | |
1047 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; | |
1048 | ||
1049 | build_id__sprintf(build_id, sizeof(build_id), | |
1050 | build_id_hex); | |
4d1e00a8 ACM |
1051 | snprintf(name, size, |
1052 | "/usr/lib/debug/.build-id/%.2s/%s.debug", | |
d3379ab9 ACM |
1053 | build_id_hex, build_id_hex + 2); |
1054 | if (self->has_build_id) | |
1055 | goto compare_build_id; | |
1056 | break; | |
4d1e00a8 | 1057 | } |
94cb9e38 | 1058 | self->origin++; |
4d1e00a8 | 1059 | /* Fall thru */ |
94cb9e38 | 1060 | case DSO__ORIG_DSO: |
439d473b | 1061 | snprintf(name, size, "%s", self->long_name); |
a2928c42 ACM |
1062 | break; |
1063 | ||
1064 | default: | |
1065 | goto out; | |
1066 | } | |
a2928c42 | 1067 | |
8d06367f | 1068 | if (self->has_build_id) { |
d3379ab9 ACM |
1069 | if (filename__read_build_id(name, build_id, |
1070 | sizeof(build_id)) < 0) | |
8d06367f | 1071 | goto more; |
8d06367f | 1072 | compare_build_id: |
d3379ab9 ACM |
1073 | if (memcmp(build_id, self->build_id, |
1074 | sizeof(self->build_id)) != 0) | |
8d06367f ACM |
1075 | goto more; |
1076 | } | |
1077 | ||
a2928c42 ACM |
1078 | fd = open(name, O_RDONLY); |
1079 | } while (fd < 0); | |
1080 | ||
6beba7ad | 1081 | ret = dso__load_sym(self, map, name, fd, filter, 0, 0); |
a2928c42 ACM |
1082 | close(fd); |
1083 | ||
1084 | /* | |
1085 | * Some people seem to have debuginfo files _WITHOUT_ debug info!?!? | |
1086 | */ | |
1087 | if (!ret) | |
1088 | goto more; | |
1089 | ||
a25e46c4 | 1090 | if (ret > 0) { |
82164161 | 1091 | int nr_plt = dso__synthesize_plt_symbols(self, map, filter); |
a25e46c4 ACM |
1092 | if (nr_plt > 0) |
1093 | ret += nr_plt; | |
1094 | } | |
a2928c42 ACM |
1095 | out: |
1096 | free(name); | |
1340e6bb ACM |
1097 | if (ret < 0 && strstr(self->name, " (deleted)") != NULL) |
1098 | return 0; | |
a2928c42 ACM |
1099 | return ret; |
1100 | } | |
1101 | ||
439d473b ACM |
1102 | struct map *kernel_map; |
1103 | ||
1104 | static void kernel_maps__insert(struct map *map) | |
6cfcc53e | 1105 | { |
439d473b ACM |
1106 | maps__insert(&kernel_maps, map); |
1107 | } | |
6cfcc53e | 1108 | |
439d473b ACM |
1109 | struct symbol *kernel_maps__find_symbol(u64 ip, struct map **mapp) |
1110 | { | |
439d473b | 1111 | struct map *map = maps__find(&kernel_maps, ip); |
2e538c4a ACM |
1112 | |
1113 | if (mapp) | |
1114 | *mapp = map; | |
439d473b ACM |
1115 | |
1116 | if (map) { | |
1117 | ip = map->map_ip(map, ip); | |
2e538c4a | 1118 | return map->dso->find_symbol(map->dso, ip); |
439d473b | 1119 | } |
6cfcc53e | 1120 | |
2e538c4a | 1121 | return NULL; |
439d473b ACM |
1122 | } |
1123 | ||
1124 | struct map *kernel_maps__find_by_dso_name(const char *name) | |
1125 | { | |
1126 | struct rb_node *nd; | |
1127 | ||
1128 | for (nd = rb_first(&kernel_maps); nd; nd = rb_next(nd)) { | |
1129 | struct map *map = rb_entry(nd, struct map, rb_node); | |
1130 | ||
1131 | if (map->dso && strcmp(map->dso->name, name) == 0) | |
1132 | return map; | |
1133 | } | |
1134 | ||
1135 | return NULL; | |
1136 | } | |
1137 | ||
1138 | static int dso__load_module_sym(struct dso *self, struct map *map, | |
6beba7ad | 1139 | symbol_filter_t filter) |
439d473b ACM |
1140 | { |
1141 | int err = 0, fd = open(self->long_name, O_RDONLY); | |
1142 | ||
8d06367f | 1143 | self->loaded = 1; |
66bd8424 | 1144 | |
439d473b | 1145 | if (fd < 0) { |
6beba7ad | 1146 | pr_err("%s: cannot open %s\n", __func__, self->long_name); |
6cfcc53e | 1147 | return err; |
439d473b | 1148 | } |
6cfcc53e | 1149 | |
6beba7ad | 1150 | err = dso__load_sym(self, map, self->long_name, fd, filter, 0, 1); |
6cfcc53e MG |
1151 | close(fd); |
1152 | ||
1153 | return err; | |
1154 | } | |
1155 | ||
6beba7ad | 1156 | static int dsos__load_modules_sym_dir(char *dirname, symbol_filter_t filter) |
6cfcc53e | 1157 | { |
439d473b ACM |
1158 | struct dirent *dent; |
1159 | int nr_symbols = 0, err; | |
1160 | DIR *dir = opendir(dirname); | |
6cfcc53e | 1161 | |
439d473b | 1162 | if (!dir) { |
6beba7ad | 1163 | pr_err("%s: cannot open %s dir\n", __func__, dirname); |
439d473b ACM |
1164 | return -1; |
1165 | } | |
6cfcc53e | 1166 | |
439d473b ACM |
1167 | while ((dent = readdir(dir)) != NULL) { |
1168 | char path[PATH_MAX]; | |
1169 | ||
1170 | if (dent->d_type == DT_DIR) { | |
1171 | if (!strcmp(dent->d_name, ".") || | |
1172 | !strcmp(dent->d_name, "..")) | |
1173 | continue; | |
1174 | ||
1175 | snprintf(path, sizeof(path), "%s/%s", | |
1176 | dirname, dent->d_name); | |
6beba7ad | 1177 | err = dsos__load_modules_sym_dir(path, filter); |
439d473b ACM |
1178 | if (err < 0) |
1179 | goto failure; | |
1180 | } else { | |
1181 | char *dot = strrchr(dent->d_name, '.'), | |
1182 | dso_name[PATH_MAX]; | |
1183 | struct map *map; | |
1184 | struct rb_node *last; | |
cfc10d3b | 1185 | char *long_name; |
439d473b ACM |
1186 | |
1187 | if (dot == NULL || strcmp(dot, ".ko")) | |
1188 | continue; | |
1189 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1190 | (int)(dot - dent->d_name), dent->d_name); | |
1191 | ||
a2a99e8e | 1192 | strxfrchar(dso_name, '-', '_'); |
439d473b ACM |
1193 | map = kernel_maps__find_by_dso_name(dso_name); |
1194 | if (map == NULL) | |
1195 | continue; | |
1196 | ||
1197 | snprintf(path, sizeof(path), "%s/%s", | |
1198 | dirname, dent->d_name); | |
1199 | ||
cfc10d3b ACM |
1200 | long_name = strdup(path); |
1201 | if (long_name == NULL) | |
439d473b | 1202 | goto failure; |
cfc10d3b ACM |
1203 | dso__set_long_name(map->dso, long_name); |
1204 | dso__set_basename(map->dso); | |
439d473b | 1205 | |
6beba7ad | 1206 | err = dso__load_module_sym(map->dso, map, filter); |
439d473b ACM |
1207 | if (err < 0) |
1208 | goto failure; | |
1209 | last = rb_last(&map->dso->syms); | |
1210 | if (last) { | |
1211 | struct symbol *sym; | |
2e538c4a ACM |
1212 | /* |
1213 | * We do this here as well, even having the | |
1214 | * symbol size found in the symtab because | |
1215 | * misannotated ASM symbols may have the size | |
1216 | * set to zero. | |
1217 | */ | |
1218 | dso__fixup_sym_end(map->dso); | |
1219 | ||
439d473b ACM |
1220 | sym = rb_entry(last, struct symbol, rb_node); |
1221 | map->end = map->start + sym->end; | |
1222 | } | |
1223 | } | |
1224 | nr_symbols += err; | |
1225 | } | |
6cfcc53e | 1226 | |
439d473b ACM |
1227 | return nr_symbols; |
1228 | failure: | |
1229 | closedir(dir); | |
1230 | return -1; | |
1231 | } | |
6cfcc53e | 1232 | |
6beba7ad | 1233 | static int dsos__load_modules_sym(symbol_filter_t filter) |
439d473b ACM |
1234 | { |
1235 | struct utsname uts; | |
1236 | char modules_path[PATH_MAX]; | |
6cfcc53e | 1237 | |
439d473b ACM |
1238 | if (uname(&uts) < 0) |
1239 | return -1; | |
6cfcc53e | 1240 | |
439d473b ACM |
1241 | snprintf(modules_path, sizeof(modules_path), "/lib/modules/%s/kernel", |
1242 | uts.release); | |
6cfcc53e | 1243 | |
6beba7ad | 1244 | return dsos__load_modules_sym_dir(modules_path, filter); |
6cfcc53e MG |
1245 | } |
1246 | ||
439d473b ACM |
1247 | /* |
1248 | * Constructor variant for modules (where we know from /proc/modules where | |
1249 | * they are loaded) and for vmlinux, where only after we load all the | |
1250 | * symbols we'll know where it starts and ends. | |
1251 | */ | |
1252 | static struct map *map__new2(u64 start, struct dso *dso) | |
6cfcc53e | 1253 | { |
439d473b | 1254 | struct map *self = malloc(sizeof(*self)); |
6cfcc53e | 1255 | |
439d473b | 1256 | if (self != NULL) { |
439d473b | 1257 | /* |
afb7b4f0 | 1258 | * ->end will be filled after we load all the symbols |
439d473b | 1259 | */ |
afb7b4f0 | 1260 | map__init(self, start, 0, 0, dso); |
439d473b | 1261 | } |
afb7b4f0 | 1262 | |
439d473b ACM |
1263 | return self; |
1264 | } | |
1265 | ||
f1617b40 | 1266 | int dsos__load_modules(void) |
439d473b ACM |
1267 | { |
1268 | char *line = NULL; | |
1269 | size_t n; | |
1270 | FILE *file = fopen("/proc/modules", "r"); | |
1271 | struct map *map; | |
6cfcc53e | 1272 | |
439d473b ACM |
1273 | if (file == NULL) |
1274 | return -1; | |
6cfcc53e | 1275 | |
439d473b ACM |
1276 | while (!feof(file)) { |
1277 | char name[PATH_MAX]; | |
1278 | u64 start; | |
1279 | struct dso *dso; | |
1280 | char *sep; | |
1281 | int line_len; | |
6cfcc53e | 1282 | |
439d473b ACM |
1283 | line_len = getline(&line, &n, file); |
1284 | if (line_len < 0) | |
1285 | break; | |
1286 | ||
1287 | if (!line) | |
1288 | goto out_failure; | |
1289 | ||
1290 | line[--line_len] = '\0'; /* \n */ | |
1291 | ||
1292 | sep = strrchr(line, 'x'); | |
1293 | if (sep == NULL) | |
1294 | continue; | |
1295 | ||
1296 | hex2u64(sep + 1, &start); | |
1297 | ||
1298 | sep = strchr(line, ' '); | |
1299 | if (sep == NULL) | |
1300 | continue; | |
1301 | ||
1302 | *sep = '\0'; | |
1303 | ||
1304 | snprintf(name, sizeof(name), "[%s]", line); | |
00a192b3 | 1305 | dso = dso__new(name); |
439d473b ACM |
1306 | |
1307 | if (dso == NULL) | |
1308 | goto out_delete_line; | |
1309 | ||
1310 | map = map__new2(start, dso); | |
1311 | if (map == NULL) { | |
1312 | dso__delete(dso); | |
1313 | goto out_delete_line; | |
6cfcc53e | 1314 | } |
439d473b | 1315 | |
f1617b40 ACM |
1316 | snprintf(name, sizeof(name), |
1317 | "/sys/module/%s/notes/.note.gnu.build-id", line); | |
1318 | if (sysfs__read_build_id(name, dso->build_id, | |
1319 | sizeof(dso->build_id)) == 0) | |
1320 | dso->has_build_id = true; | |
1321 | ||
439d473b ACM |
1322 | dso->origin = DSO__ORIG_KMODULE; |
1323 | kernel_maps__insert(map); | |
1324 | dsos__add(dso); | |
6cfcc53e | 1325 | } |
439d473b ACM |
1326 | |
1327 | free(line); | |
1328 | fclose(file); | |
1329 | ||
af427bf5 | 1330 | return 0; |
439d473b ACM |
1331 | |
1332 | out_delete_line: | |
1333 | free(line); | |
1334 | out_failure: | |
1335 | return -1; | |
6cfcc53e MG |
1336 | } |
1337 | ||
439d473b | 1338 | static int dso__load_vmlinux(struct dso *self, struct map *map, |
6beba7ad | 1339 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 ACM |
1340 | { |
1341 | int err, fd = open(vmlinux, O_RDONLY); | |
1342 | ||
8d06367f | 1343 | self->loaded = 1; |
66bd8424 | 1344 | |
a2928c42 ACM |
1345 | if (fd < 0) |
1346 | return -1; | |
1347 | ||
6beba7ad | 1348 | err = dso__load_sym(self, map, self->long_name, fd, filter, 1, 0); |
6cfcc53e | 1349 | |
a2928c42 ACM |
1350 | close(fd); |
1351 | ||
1352 | return err; | |
1353 | } | |
1354 | ||
00a192b3 ACM |
1355 | int dsos__load_kernel(const char *vmlinux, symbol_filter_t filter, |
1356 | int use_modules) | |
a827c875 ACM |
1357 | { |
1358 | int err = -1; | |
00a192b3 | 1359 | struct dso *dso = dso__new(vmlinux); |
439d473b ACM |
1360 | |
1361 | if (dso == NULL) | |
1362 | return -1; | |
1363 | ||
1364 | dso->short_name = "[kernel]"; | |
1365 | kernel_map = map__new2(0, dso); | |
1366 | if (kernel_map == NULL) | |
1367 | goto out_delete_dso; | |
1368 | ||
ed52ce2e | 1369 | kernel_map->map_ip = kernel_map->unmap_ip = identity__map_ip; |
a827c875 | 1370 | |
00a192b3 | 1371 | if (use_modules && dsos__load_modules() < 0) { |
6beba7ad ACM |
1372 | pr_warning("Failed to load list of modules in use! " |
1373 | "Continuing...\n"); | |
af427bf5 ACM |
1374 | use_modules = 0; |
1375 | } | |
1376 | ||
6cfcc53e | 1377 | if (vmlinux) { |
6beba7ad | 1378 | err = dso__load_vmlinux(dso, kernel_map, vmlinux, filter); |
508c4d08 | 1379 | if (err > 0 && use_modules) { |
6beba7ad | 1380 | int syms = dsos__load_modules_sym(filter); |
508c4d08 | 1381 | |
af427bf5 | 1382 | if (syms < 0) |
6beba7ad ACM |
1383 | pr_warning("Failed to read module symbols!" |
1384 | " Continuing...\n"); | |
af427bf5 ACM |
1385 | else |
1386 | err += syms; | |
508c4d08 | 1387 | } |
6cfcc53e | 1388 | } |
a827c875 | 1389 | |
9974f496 | 1390 | if (err <= 0) |
6beba7ad | 1391 | err = kernel_maps__load_kallsyms(filter, use_modules); |
439d473b ACM |
1392 | |
1393 | if (err > 0) { | |
1394 | struct rb_node *node = rb_first(&dso->syms); | |
1395 | struct symbol *sym = rb_entry(node, struct symbol, rb_node); | |
a827c875 | 1396 | |
439d473b ACM |
1397 | kernel_map->start = sym->start; |
1398 | node = rb_last(&dso->syms); | |
1399 | sym = rb_entry(node, struct symbol, rb_node); | |
1400 | kernel_map->end = sym->end; | |
1401 | ||
1402 | dso->origin = DSO__ORIG_KERNEL; | |
2e538c4a | 1403 | kernel_maps__insert(kernel_map); |
439d473b | 1404 | /* |
2e538c4a ACM |
1405 | * Now that we have all sorted out, just set the ->end of all |
1406 | * maps: | |
439d473b | 1407 | */ |
2e538c4a | 1408 | kernel_maps__fixup_end(); |
439d473b | 1409 | dsos__add(dso); |
af427bf5 | 1410 | |
6beba7ad ACM |
1411 | if (verbose) |
1412 | kernel_maps__fprintf(stderr); | |
439d473b | 1413 | } |
94cb9e38 | 1414 | |
a827c875 | 1415 | return err; |
439d473b ACM |
1416 | |
1417 | out_delete_dso: | |
1418 | dso__delete(dso); | |
1419 | return -1; | |
a827c875 ACM |
1420 | } |
1421 | ||
cd84c2ac | 1422 | LIST_HEAD(dsos); |
cd84c2ac | 1423 | struct dso *vdso; |
cd84c2ac | 1424 | |
83a0944f | 1425 | const char *vmlinux_name = "vmlinux"; |
cd84c2ac FW |
1426 | int modules; |
1427 | ||
1428 | static void dsos__add(struct dso *dso) | |
1429 | { | |
1430 | list_add_tail(&dso->node, &dsos); | |
1431 | } | |
1432 | ||
1433 | static struct dso *dsos__find(const char *name) | |
1434 | { | |
1435 | struct dso *pos; | |
1436 | ||
1437 | list_for_each_entry(pos, &dsos, node) | |
1438 | if (strcmp(pos->name, name) == 0) | |
1439 | return pos; | |
1440 | return NULL; | |
1441 | } | |
1442 | ||
00a192b3 | 1443 | struct dso *dsos__findnew(const char *name) |
cd84c2ac FW |
1444 | { |
1445 | struct dso *dso = dsos__find(name); | |
cd84c2ac | 1446 | |
e4204992 | 1447 | if (!dso) { |
00a192b3 | 1448 | dso = dso__new(name); |
cfc10d3b | 1449 | if (dso != NULL) { |
e4204992 | 1450 | dsos__add(dso); |
cfc10d3b ACM |
1451 | dso__set_basename(dso); |
1452 | } | |
66bd8424 | 1453 | } |
cd84c2ac FW |
1454 | |
1455 | return dso; | |
cd84c2ac FW |
1456 | } |
1457 | ||
1458 | void dsos__fprintf(FILE *fp) | |
1459 | { | |
1460 | struct dso *pos; | |
1461 | ||
1462 | list_for_each_entry(pos, &dsos, node) | |
1463 | dso__fprintf(pos, fp); | |
1464 | } | |
1465 | ||
9e03eb2d ACM |
1466 | size_t dsos__fprintf_buildid(FILE *fp) |
1467 | { | |
1468 | struct dso *pos; | |
1469 | size_t ret = 0; | |
1470 | ||
1471 | list_for_each_entry(pos, &dsos, node) { | |
1472 | ret += dso__fprintf_buildid(pos, fp); | |
1124ba73 | 1473 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
1474 | } |
1475 | return ret; | |
1476 | } | |
1477 | ||
00a192b3 | 1478 | int load_kernel(symbol_filter_t filter) |
cd84c2ac | 1479 | { |
00a192b3 | 1480 | if (dsos__load_kernel(vmlinux_name, filter, modules) <= 0) |
cd84c2ac FW |
1481 | return -1; |
1482 | ||
00a192b3 | 1483 | vdso = dso__new("[vdso]"); |
cd84c2ac FW |
1484 | if (!vdso) |
1485 | return -1; | |
1486 | ||
cd84c2ac FW |
1487 | dsos__add(vdso); |
1488 | ||
439d473b | 1489 | return 0; |
cd84c2ac FW |
1490 | } |
1491 | ||
00a192b3 | 1492 | void symbol__init(unsigned int priv_size) |
a2928c42 ACM |
1493 | { |
1494 | elf_version(EV_CURRENT); | |
00a192b3 | 1495 | symbol__priv_size = priv_size; |
a2928c42 | 1496 | } |