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