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