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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 | ||
b32d133a | 9 | #include <asm/bug.h> |
a2928c42 ACM |
10 | #include <libelf.h> |
11 | #include <gelf.h> | |
12 | #include <elf.h> | |
f1617b40 | 13 | #include <limits.h> |
439d473b | 14 | #include <sys/utsname.h> |
2cdbc46d | 15 | |
c12e15e7 ACM |
16 | #ifndef NT_GNU_BUILD_ID |
17 | #define NT_GNU_BUILD_ID 3 | |
18 | #endif | |
19 | ||
94cb9e38 ACM |
20 | enum dso_origin { |
21 | DSO__ORIG_KERNEL = 0, | |
22 | DSO__ORIG_JAVA_JIT, | |
23 | DSO__ORIG_FEDORA, | |
24 | DSO__ORIG_UBUNTU, | |
25 | DSO__ORIG_BUILDID, | |
26 | DSO__ORIG_DSO, | |
439d473b | 27 | DSO__ORIG_KMODULE, |
94cb9e38 ACM |
28 | DSO__ORIG_NOT_FOUND, |
29 | }; | |
30 | ||
b0da954a | 31 | static void dsos__add(struct list_head *head, struct dso *dso); |
3610583c | 32 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type); |
2e538c4a | 33 | static void kernel_maps__insert(struct map *map); |
6a4694a4 | 34 | struct symbol *dso__find_symbol(struct dso *self, enum map_type type, u64 addr); |
c338aee8 ACM |
35 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
36 | symbol_filter_t filter); | |
00a192b3 | 37 | unsigned int symbol__priv_size; |
cc612d81 ACM |
38 | static int vmlinux_path__nr_entries; |
39 | static char **vmlinux_path; | |
439d473b | 40 | |
b32d133a ACM |
41 | static struct symbol_conf symbol_conf__defaults = { |
42 | .use_modules = true, | |
43 | .try_vmlinux_path = true, | |
44 | }; | |
45 | ||
61f37a82 | 46 | static struct rb_root kernel_maps__functions; |
af427bf5 | 47 | |
3610583c ACM |
48 | bool dso__loaded(const struct dso *self, enum map_type type) |
49 | { | |
50 | return self->loaded & (1 << type); | |
51 | } | |
52 | ||
53 | static void dso__set_loaded(struct dso *self, enum map_type type) | |
54 | { | |
55 | self->loaded |= (1 << type); | |
56 | } | |
57 | ||
fcf1203a | 58 | static void symbols__fixup_end(struct rb_root *self) |
af427bf5 | 59 | { |
fcf1203a | 60 | struct rb_node *nd, *prevnd = rb_first(self); |
2e538c4a | 61 | struct symbol *curr, *prev; |
af427bf5 ACM |
62 | |
63 | if (prevnd == NULL) | |
64 | return; | |
65 | ||
2e538c4a ACM |
66 | curr = rb_entry(prevnd, struct symbol, rb_node); |
67 | ||
af427bf5 | 68 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
69 | prev = curr; |
70 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 ACM |
71 | |
72 | if (prev->end == prev->start) | |
73 | prev->end = curr->start - 1; | |
af427bf5 | 74 | } |
2e538c4a ACM |
75 | |
76 | /* Last entry */ | |
77 | if (curr->end == curr->start) | |
78 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
79 | } |
80 | ||
2e538c4a | 81 | static void kernel_maps__fixup_end(void) |
af427bf5 ACM |
82 | { |
83 | struct map *prev, *curr; | |
61f37a82 | 84 | struct rb_node *nd, *prevnd = rb_first(&kernel_maps__functions); |
af427bf5 ACM |
85 | |
86 | if (prevnd == NULL) | |
87 | return; | |
88 | ||
89 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
90 | |
91 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
92 | prev = curr; | |
93 | curr = rb_entry(nd, struct map, rb_node); | |
94 | prev->end = curr->start - 1; | |
2e538c4a | 95 | } |
90c83218 ACM |
96 | |
97 | /* | |
98 | * We still haven't the actual symbols, so guess the | |
99 | * last map final address. | |
100 | */ | |
101 | curr->end = ~0UL; | |
af427bf5 ACM |
102 | } |
103 | ||
00a192b3 | 104 | static struct symbol *symbol__new(u64 start, u64 len, const char *name) |
a2928c42 | 105 | { |
0085c954 | 106 | size_t namelen = strlen(name) + 1; |
36479484 ACM |
107 | struct symbol *self = zalloc(symbol__priv_size + |
108 | sizeof(*self) + namelen); | |
109 | if (self == NULL) | |
0b73da3f IM |
110 | return NULL; |
111 | ||
36479484 | 112 | if (symbol__priv_size) |
00a192b3 | 113 | self = ((void *)self) + symbol__priv_size; |
36479484 | 114 | |
0b73da3f | 115 | self->start = start; |
6cfcc53e | 116 | self->end = len ? start + len - 1 : start; |
e4204992 | 117 | |
6beba7ad | 118 | pr_debug3("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end); |
e4204992 | 119 | |
0b73da3f | 120 | memcpy(self->name, name, namelen); |
a2928c42 ACM |
121 | |
122 | return self; | |
123 | } | |
124 | ||
00a192b3 | 125 | static void symbol__delete(struct symbol *self) |
a2928c42 | 126 | { |
00a192b3 | 127 | free(((void *)self) - symbol__priv_size); |
a2928c42 ACM |
128 | } |
129 | ||
130 | static size_t symbol__fprintf(struct symbol *self, FILE *fp) | |
131 | { | |
439d473b | 132 | return fprintf(fp, " %llx-%llx %s\n", |
a2928c42 ACM |
133 | self->start, self->end, self->name); |
134 | } | |
135 | ||
cfc10d3b ACM |
136 | static void dso__set_long_name(struct dso *self, char *name) |
137 | { | |
ef6ae724 ACM |
138 | if (name == NULL) |
139 | return; | |
cfc10d3b ACM |
140 | self->long_name = name; |
141 | self->long_name_len = strlen(name); | |
142 | } | |
143 | ||
144 | static void dso__set_basename(struct dso *self) | |
145 | { | |
146 | self->short_name = basename(self->long_name); | |
147 | } | |
148 | ||
00a192b3 | 149 | struct dso *dso__new(const char *name) |
a2928c42 ACM |
150 | { |
151 | struct dso *self = malloc(sizeof(*self) + strlen(name) + 1); | |
152 | ||
153 | if (self != NULL) { | |
6a4694a4 | 154 | int i; |
a2928c42 | 155 | strcpy(self->name, name); |
cfc10d3b | 156 | dso__set_long_name(self, self->name); |
439d473b | 157 | self->short_name = self->name; |
6a4694a4 ACM |
158 | for (i = 0; i < MAP__NR_TYPES; ++i) |
159 | self->symbols[i] = RB_ROOT; | |
160 | self->find_symbol = dso__find_symbol; | |
52d422de | 161 | self->slen_calculated = 0; |
94cb9e38 | 162 | self->origin = DSO__ORIG_NOT_FOUND; |
8d06367f ACM |
163 | self->loaded = 0; |
164 | self->has_build_id = 0; | |
a2928c42 ACM |
165 | } |
166 | ||
167 | return self; | |
168 | } | |
169 | ||
fcf1203a | 170 | static void symbols__delete(struct rb_root *self) |
a2928c42 ACM |
171 | { |
172 | struct symbol *pos; | |
fcf1203a | 173 | struct rb_node *next = rb_first(self); |
a2928c42 ACM |
174 | |
175 | while (next) { | |
176 | pos = rb_entry(next, struct symbol, rb_node); | |
177 | next = rb_next(&pos->rb_node); | |
fcf1203a | 178 | rb_erase(&pos->rb_node, self); |
00a192b3 | 179 | symbol__delete(pos); |
a2928c42 ACM |
180 | } |
181 | } | |
182 | ||
183 | void dso__delete(struct dso *self) | |
184 | { | |
6a4694a4 ACM |
185 | int i; |
186 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
187 | symbols__delete(&self->symbols[i]); | |
439d473b ACM |
188 | if (self->long_name != self->name) |
189 | free(self->long_name); | |
a2928c42 ACM |
190 | free(self); |
191 | } | |
192 | ||
8d06367f ACM |
193 | void dso__set_build_id(struct dso *self, void *build_id) |
194 | { | |
195 | memcpy(self->build_id, build_id, sizeof(self->build_id)); | |
196 | self->has_build_id = 1; | |
197 | } | |
198 | ||
fcf1203a | 199 | static void symbols__insert(struct rb_root *self, struct symbol *sym) |
a2928c42 | 200 | { |
fcf1203a | 201 | struct rb_node **p = &self->rb_node; |
a2928c42 | 202 | struct rb_node *parent = NULL; |
9cffa8d5 | 203 | const u64 ip = sym->start; |
a2928c42 ACM |
204 | struct symbol *s; |
205 | ||
206 | while (*p != NULL) { | |
207 | parent = *p; | |
208 | s = rb_entry(parent, struct symbol, rb_node); | |
209 | if (ip < s->start) | |
210 | p = &(*p)->rb_left; | |
211 | else | |
212 | p = &(*p)->rb_right; | |
213 | } | |
214 | rb_link_node(&sym->rb_node, parent, p); | |
fcf1203a | 215 | rb_insert_color(&sym->rb_node, self); |
a2928c42 ACM |
216 | } |
217 | ||
fcf1203a | 218 | static struct symbol *symbols__find(struct rb_root *self, u64 ip) |
a2928c42 ACM |
219 | { |
220 | struct rb_node *n; | |
221 | ||
222 | if (self == NULL) | |
223 | return NULL; | |
224 | ||
fcf1203a | 225 | n = self->rb_node; |
a2928c42 ACM |
226 | |
227 | while (n) { | |
228 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
229 | ||
230 | if (ip < s->start) | |
231 | n = n->rb_left; | |
232 | else if (ip > s->end) | |
233 | n = n->rb_right; | |
234 | else | |
235 | return s; | |
236 | } | |
237 | ||
238 | return NULL; | |
239 | } | |
240 | ||
6a4694a4 | 241 | struct symbol *dso__find_symbol(struct dso *self, enum map_type type, u64 addr) |
fcf1203a | 242 | { |
6a4694a4 | 243 | return symbols__find(&self->symbols[type], addr); |
fcf1203a ACM |
244 | } |
245 | ||
8d06367f | 246 | int build_id__sprintf(u8 *self, int len, char *bf) |
a2928c42 | 247 | { |
8d06367f ACM |
248 | char *bid = bf; |
249 | u8 *raw = self; | |
250 | int i; | |
a2928c42 | 251 | |
8d06367f ACM |
252 | for (i = 0; i < len; ++i) { |
253 | sprintf(bid, "%02x", *raw); | |
254 | ++raw; | |
255 | bid += 2; | |
256 | } | |
257 | ||
258 | return raw - self; | |
259 | } | |
260 | ||
9e03eb2d | 261 | size_t dso__fprintf_buildid(struct dso *self, FILE *fp) |
8d06367f ACM |
262 | { |
263 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f ACM |
264 | |
265 | build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id); | |
9e03eb2d ACM |
266 | return fprintf(fp, "%s", sbuild_id); |
267 | } | |
268 | ||
6a4694a4 ACM |
269 | static const char * map_type__name[MAP__NR_TYPES] = { |
270 | [MAP__FUNCTION] = "Functions", | |
271 | }; | |
272 | ||
9e03eb2d ACM |
273 | size_t dso__fprintf(struct dso *self, FILE *fp) |
274 | { | |
6a4694a4 | 275 | int i; |
9e03eb2d ACM |
276 | struct rb_node *nd; |
277 | size_t ret = fprintf(fp, "dso: %s (", self->short_name); | |
278 | ||
279 | ret += dso__fprintf_buildid(self, fp); | |
6a4694a4 ACM |
280 | ret += fprintf(fp, ")\n"); |
281 | for (i = 0; i < MAP__NR_TYPES; ++i) { | |
282 | ret += fprintf(fp, "%s:\n", map_type__name[i]); | |
8d06367f | 283 | |
6a4694a4 ACM |
284 | for (nd = rb_first(&self->symbols[i]); nd; nd = rb_next(nd)) { |
285 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
286 | ret += symbol__fprintf(pos, fp); | |
287 | } | |
a2928c42 ACM |
288 | } |
289 | ||
290 | return ret; | |
291 | } | |
292 | ||
2e538c4a ACM |
293 | /* |
294 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
295 | * so that we can in the next step set the symbol ->end address and then | |
296 | * call kernel_maps__split_kallsyms. | |
297 | */ | |
4e06255f | 298 | static int dso__load_all_kallsyms(struct dso *self, struct map *map) |
a2928c42 | 299 | { |
a2928c42 ACM |
300 | char *line = NULL; |
301 | size_t n; | |
4e06255f | 302 | struct rb_root *root = &self->symbols[map->type]; |
a2928c42 ACM |
303 | FILE *file = fopen("/proc/kallsyms", "r"); |
304 | ||
305 | if (file == NULL) | |
306 | goto out_failure; | |
307 | ||
308 | while (!feof(file)) { | |
9cffa8d5 | 309 | u64 start; |
a2928c42 ACM |
310 | struct symbol *sym; |
311 | int line_len, len; | |
312 | char symbol_type; | |
2e538c4a | 313 | char *symbol_name; |
a2928c42 ACM |
314 | |
315 | line_len = getline(&line, &n, file); | |
316 | if (line_len < 0) | |
317 | break; | |
318 | ||
319 | if (!line) | |
320 | goto out_failure; | |
321 | ||
322 | line[--line_len] = '\0'; /* \n */ | |
323 | ||
a0055ae2 | 324 | len = hex2u64(line, &start); |
a2928c42 ACM |
325 | |
326 | len++; | |
327 | if (len + 2 >= line_len) | |
328 | continue; | |
329 | ||
330 | symbol_type = toupper(line[len]); | |
331 | /* | |
332 | * We're interested only in code ('T'ext) | |
333 | */ | |
334 | if (symbol_type != 'T' && symbol_type != 'W') | |
335 | continue; | |
af427bf5 ACM |
336 | |
337 | symbol_name = line + len + 2; | |
2e538c4a ACM |
338 | /* |
339 | * Will fix up the end later, when we have all symbols sorted. | |
340 | */ | |
00a192b3 | 341 | sym = symbol__new(start, 0, symbol_name); |
af427bf5 | 342 | |
2e538c4a ACM |
343 | if (sym == NULL) |
344 | goto out_delete_line; | |
82164161 ACM |
345 | /* |
346 | * We will pass the symbols to the filter later, in | |
4e06255f | 347 | * map__split_kallsyms, when we have split the maps per module |
82164161 | 348 | */ |
4e06255f | 349 | symbols__insert(root, sym); |
2e538c4a ACM |
350 | } |
351 | ||
352 | free(line); | |
353 | fclose(file); | |
354 | ||
355 | return 0; | |
356 | ||
357 | out_delete_line: | |
358 | free(line); | |
359 | out_failure: | |
360 | return -1; | |
361 | } | |
362 | ||
363 | /* | |
364 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
365 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
366 | * the original ELF section names vmlinux have. | |
367 | */ | |
4e06255f ACM |
368 | static int dso__split_kallsyms(struct dso *self, struct map *map, |
369 | symbol_filter_t filter) | |
2e538c4a | 370 | { |
4e06255f | 371 | struct map *curr_map = map; |
2e538c4a ACM |
372 | struct symbol *pos; |
373 | int count = 0; | |
4e06255f ACM |
374 | struct rb_root *root = &self->symbols[map->type]; |
375 | struct rb_node *next = rb_first(root); | |
2e538c4a ACM |
376 | int kernel_range = 0; |
377 | ||
378 | while (next) { | |
379 | char *module; | |
380 | ||
381 | pos = rb_entry(next, struct symbol, rb_node); | |
382 | next = rb_next(&pos->rb_node); | |
383 | ||
384 | module = strchr(pos->name, '\t'); | |
385 | if (module) { | |
2e538c4a ACM |
386 | *module++ = '\0'; |
387 | ||
4e06255f ACM |
388 | if (strcmp(self->name, module)) { |
389 | curr_map = kernel_maps__find_by_dso_name(module); | |
390 | if (curr_map == NULL) { | |
6beba7ad ACM |
391 | pr_err("/proc/{kallsyms,modules} " |
392 | "inconsistency!\n"); | |
af427bf5 ACM |
393 | return -1; |
394 | } | |
395 | } | |
2e538c4a ACM |
396 | /* |
397 | * So that we look just like we get from .ko files, | |
398 | * i.e. not prelinked, relative to map->start. | |
399 | */ | |
4e06255f ACM |
400 | pos->start = curr_map->map_ip(curr_map, pos->start); |
401 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
402 | } else if (curr_map != map) { | |
2e538c4a ACM |
403 | char dso_name[PATH_MAX]; |
404 | struct dso *dso; | |
405 | ||
406 | snprintf(dso_name, sizeof(dso_name), "[kernel].%d", | |
407 | kernel_range++); | |
408 | ||
00a192b3 | 409 | dso = dso__new(dso_name); |
2e538c4a ACM |
410 | if (dso == NULL) |
411 | return -1; | |
412 | ||
4e06255f | 413 | curr_map = map__new2(pos->start, dso, map->type); |
2e538c4a ACM |
414 | if (map == NULL) { |
415 | dso__delete(dso); | |
416 | return -1; | |
417 | } | |
a2928c42 | 418 | |
4e06255f ACM |
419 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
420 | kernel_maps__insert(curr_map); | |
2e538c4a ACM |
421 | ++kernel_range; |
422 | } | |
a2928c42 | 423 | |
4e06255f ACM |
424 | if (filter && filter(curr_map, pos)) { |
425 | rb_erase(&pos->rb_node, root); | |
00a192b3 | 426 | symbol__delete(pos); |
2e538c4a | 427 | } else { |
4e06255f ACM |
428 | if (curr_map != map) { |
429 | rb_erase(&pos->rb_node, root); | |
430 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
2e538c4a | 431 | } |
9974f496 MG |
432 | count++; |
433 | } | |
a2928c42 ACM |
434 | } |
435 | ||
9974f496 | 436 | return count; |
2e538c4a | 437 | } |
a2928c42 | 438 | |
2e538c4a | 439 | |
4e06255f ACM |
440 | static int dso__load_kallsyms(struct dso *self, struct map *map, |
441 | symbol_filter_t filter) | |
2e538c4a | 442 | { |
4e06255f | 443 | if (dso__load_all_kallsyms(self, map) < 0) |
2e538c4a ACM |
444 | return -1; |
445 | ||
4e06255f ACM |
446 | symbols__fixup_end(&self->symbols[map->type]); |
447 | self->origin = DSO__ORIG_KERNEL; | |
2e538c4a | 448 | |
4e06255f | 449 | return dso__split_kallsyms(self, map, filter); |
a2928c42 ACM |
450 | } |
451 | ||
c338aee8 | 452 | size_t kernel_maps__fprintf(FILE *fp) |
af427bf5 | 453 | { |
6beba7ad | 454 | size_t printed = fprintf(fp, "Kernel maps:\n"); |
af427bf5 ACM |
455 | struct rb_node *nd; |
456 | ||
61f37a82 | 457 | for (nd = rb_first(&kernel_maps__functions); nd; nd = rb_next(nd)) { |
af427bf5 ACM |
458 | struct map *pos = rb_entry(nd, struct map, rb_node); |
459 | ||
2e538c4a | 460 | printed += fprintf(fp, "Map:"); |
af427bf5 | 461 | printed += map__fprintf(pos, fp); |
6beba7ad | 462 | if (verbose > 1) { |
2e538c4a ACM |
463 | printed += dso__fprintf(pos->dso, fp); |
464 | printed += fprintf(fp, "--\n"); | |
465 | } | |
af427bf5 ACM |
466 | } |
467 | ||
6beba7ad | 468 | return printed + fprintf(fp, "END kernel maps\n"); |
af427bf5 ACM |
469 | } |
470 | ||
439d473b | 471 | static int dso__load_perf_map(struct dso *self, struct map *map, |
6beba7ad | 472 | symbol_filter_t filter) |
80d496be PE |
473 | { |
474 | char *line = NULL; | |
475 | size_t n; | |
476 | FILE *file; | |
477 | int nr_syms = 0; | |
478 | ||
439d473b | 479 | file = fopen(self->long_name, "r"); |
80d496be PE |
480 | if (file == NULL) |
481 | goto out_failure; | |
482 | ||
483 | while (!feof(file)) { | |
9cffa8d5 | 484 | u64 start, size; |
80d496be PE |
485 | struct symbol *sym; |
486 | int line_len, len; | |
487 | ||
488 | line_len = getline(&line, &n, file); | |
489 | if (line_len < 0) | |
490 | break; | |
491 | ||
492 | if (!line) | |
493 | goto out_failure; | |
494 | ||
495 | line[--line_len] = '\0'; /* \n */ | |
496 | ||
497 | len = hex2u64(line, &start); | |
498 | ||
499 | len++; | |
500 | if (len + 2 >= line_len) | |
501 | continue; | |
502 | ||
503 | len += hex2u64(line + len, &size); | |
504 | ||
505 | len++; | |
506 | if (len + 2 >= line_len) | |
507 | continue; | |
508 | ||
00a192b3 | 509 | sym = symbol__new(start, size, line + len); |
80d496be PE |
510 | |
511 | if (sym == NULL) | |
512 | goto out_delete_line; | |
513 | ||
439d473b | 514 | if (filter && filter(map, sym)) |
00a192b3 | 515 | symbol__delete(sym); |
80d496be | 516 | else { |
6a4694a4 | 517 | symbols__insert(&self->symbols[map->type], sym); |
80d496be PE |
518 | nr_syms++; |
519 | } | |
520 | } | |
521 | ||
522 | free(line); | |
523 | fclose(file); | |
524 | ||
525 | return nr_syms; | |
526 | ||
527 | out_delete_line: | |
528 | free(line); | |
529 | out_failure: | |
530 | return -1; | |
531 | } | |
532 | ||
a2928c42 ACM |
533 | /** |
534 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
535 | * | |
536 | * @self: struct elf_symtab instance to iterate | |
83a0944f | 537 | * @idx: uint32_t idx |
a2928c42 ACM |
538 | * @sym: GElf_Sym iterator |
539 | */ | |
83a0944f IM |
540 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
541 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
542 | idx < nr_syms; \ | |
543 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
544 | |
545 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
546 | { | |
547 | return GELF_ST_TYPE(sym->st_info); | |
548 | } | |
549 | ||
550 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
551 | { | |
552 | return elf_sym__type(sym) == STT_FUNC && | |
553 | sym->st_name != 0 && | |
81833130 | 554 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
555 | } |
556 | ||
6cfcc53e MG |
557 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
558 | { | |
559 | return elf_sym__type(sym) == STT_NOTYPE && | |
560 | sym->st_name != 0 && | |
561 | sym->st_shndx != SHN_UNDEF && | |
562 | sym->st_shndx != SHN_ABS; | |
563 | } | |
564 | ||
565 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
566 | const Elf_Data *secstrs) | |
567 | { | |
568 | return secstrs->d_buf + shdr->sh_name; | |
569 | } | |
570 | ||
571 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
572 | const Elf_Data *secstrs) | |
573 | { | |
574 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
575 | } | |
576 | ||
a2928c42 ACM |
577 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
578 | const Elf_Data *symstrs) | |
579 | { | |
580 | return symstrs->d_buf + sym->st_name; | |
581 | } | |
582 | ||
583 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
584 | GElf_Shdr *shp, const char *name, | |
83a0944f | 585 | size_t *idx) |
a2928c42 ACM |
586 | { |
587 | Elf_Scn *sec = NULL; | |
588 | size_t cnt = 1; | |
589 | ||
590 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
591 | char *str; | |
592 | ||
593 | gelf_getshdr(sec, shp); | |
594 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
595 | if (!strcmp(name, str)) { | |
83a0944f IM |
596 | if (idx) |
597 | *idx = cnt; | |
a2928c42 ACM |
598 | break; |
599 | } | |
600 | ++cnt; | |
601 | } | |
602 | ||
603 | return sec; | |
604 | } | |
605 | ||
8ce998d6 ACM |
606 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
607 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
608 | idx < nr_entries; \ | |
609 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
610 | ||
611 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
612 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
613 | idx < nr_entries; \ | |
614 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
615 | ||
a25e46c4 ACM |
616 | /* |
617 | * We need to check if we have a .dynsym, so that we can handle the | |
618 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
619 | * .dynsym or .symtab). | |
620 | * And always look at the original dso, not at debuginfo packages, that | |
621 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
622 | */ | |
82164161 ACM |
623 | static int dso__synthesize_plt_symbols(struct dso *self, struct map *map, |
624 | symbol_filter_t filter) | |
8ce998d6 ACM |
625 | { |
626 | uint32_t nr_rel_entries, idx; | |
627 | GElf_Sym sym; | |
9cffa8d5 | 628 | u64 plt_offset; |
8ce998d6 ACM |
629 | GElf_Shdr shdr_plt; |
630 | struct symbol *f; | |
a25e46c4 | 631 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 632 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
633 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
634 | size_t dynsym_idx; | |
635 | GElf_Ehdr ehdr; | |
8ce998d6 | 636 | char sympltname[1024]; |
a25e46c4 ACM |
637 | Elf *elf; |
638 | int nr = 0, symidx, fd, err = 0; | |
639 | ||
439d473b | 640 | fd = open(self->long_name, O_RDONLY); |
a25e46c4 ACM |
641 | if (fd < 0) |
642 | goto out; | |
643 | ||
84087126 | 644 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
645 | if (elf == NULL) |
646 | goto out_close; | |
647 | ||
648 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
649 | goto out_elf_end; | |
650 | ||
651 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
652 | ".dynsym", &dynsym_idx); | |
653 | if (scn_dynsym == NULL) | |
654 | goto out_elf_end; | |
8ce998d6 | 655 | |
a25e46c4 | 656 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
657 | ".rela.plt", NULL); |
658 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 659 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
660 | ".rel.plt", NULL); |
661 | if (scn_plt_rel == NULL) | |
a25e46c4 | 662 | goto out_elf_end; |
8ce998d6 ACM |
663 | } |
664 | ||
a25e46c4 ACM |
665 | err = -1; |
666 | ||
8ce998d6 | 667 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 668 | goto out_elf_end; |
8ce998d6 | 669 | |
a25e46c4 ACM |
670 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
671 | goto out_elf_end; | |
8ce998d6 ACM |
672 | |
673 | /* | |
83a0944f | 674 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
675 | * and the symbols in the .dynsym they refer to. |
676 | */ | |
677 | reldata = elf_getdata(scn_plt_rel, NULL); | |
678 | if (reldata == NULL) | |
a25e46c4 | 679 | goto out_elf_end; |
8ce998d6 ACM |
680 | |
681 | syms = elf_getdata(scn_dynsym, NULL); | |
682 | if (syms == NULL) | |
a25e46c4 | 683 | goto out_elf_end; |
8ce998d6 | 684 | |
a25e46c4 | 685 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 686 | if (scn_symstrs == NULL) |
a25e46c4 | 687 | goto out_elf_end; |
8ce998d6 ACM |
688 | |
689 | symstrs = elf_getdata(scn_symstrs, NULL); | |
690 | if (symstrs == NULL) | |
a25e46c4 | 691 | goto out_elf_end; |
8ce998d6 ACM |
692 | |
693 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
694 | plt_offset = shdr_plt.sh_offset; | |
695 | ||
696 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
697 | GElf_Rela pos_mem, *pos; | |
698 | ||
699 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
700 | nr_rel_entries) { | |
701 | symidx = GELF_R_SYM(pos->r_info); | |
702 | plt_offset += shdr_plt.sh_entsize; | |
703 | gelf_getsym(syms, symidx, &sym); | |
704 | snprintf(sympltname, sizeof(sympltname), | |
705 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
706 | ||
707 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 708 | sympltname); |
8ce998d6 | 709 | if (!f) |
a25e46c4 | 710 | goto out_elf_end; |
8ce998d6 | 711 | |
82164161 ACM |
712 | if (filter && filter(map, f)) |
713 | symbol__delete(f); | |
714 | else { | |
6a4694a4 | 715 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
716 | ++nr; |
717 | } | |
8ce998d6 ACM |
718 | } |
719 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
720 | GElf_Rel pos_mem, *pos; | |
721 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
722 | nr_rel_entries) { | |
723 | symidx = GELF_R_SYM(pos->r_info); | |
724 | plt_offset += shdr_plt.sh_entsize; | |
725 | gelf_getsym(syms, symidx, &sym); | |
726 | snprintf(sympltname, sizeof(sympltname), | |
727 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
728 | ||
729 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 730 | sympltname); |
8ce998d6 | 731 | if (!f) |
a25e46c4 | 732 | goto out_elf_end; |
8ce998d6 | 733 | |
82164161 ACM |
734 | if (filter && filter(map, f)) |
735 | symbol__delete(f); | |
736 | else { | |
6a4694a4 | 737 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
738 | ++nr; |
739 | } | |
8ce998d6 | 740 | } |
8ce998d6 ACM |
741 | } |
742 | ||
a25e46c4 ACM |
743 | err = 0; |
744 | out_elf_end: | |
745 | elf_end(elf); | |
746 | out_close: | |
747 | close(fd); | |
748 | ||
749 | if (err == 0) | |
750 | return nr; | |
751 | out: | |
6beba7ad ACM |
752 | pr_warning("%s: problems reading %s PLT info.\n", |
753 | __func__, self->long_name); | |
a25e46c4 | 754 | return 0; |
8ce998d6 ACM |
755 | } |
756 | ||
439d473b ACM |
757 | static int dso__load_sym(struct dso *self, struct map *map, const char *name, |
758 | int fd, symbol_filter_t filter, int kernel, | |
6beba7ad | 759 | int kmodule) |
a2928c42 | 760 | { |
2e538c4a ACM |
761 | struct map *curr_map = map; |
762 | struct dso *curr_dso = self; | |
763 | size_t dso_name_len = strlen(self->short_name); | |
6cfcc53e | 764 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
765 | uint32_t nr_syms; |
766 | int err = -1; | |
83a0944f | 767 | uint32_t idx; |
a2928c42 ACM |
768 | GElf_Ehdr ehdr; |
769 | GElf_Shdr shdr; | |
770 | Elf_Data *syms; | |
771 | GElf_Sym sym; | |
a25e46c4 | 772 | Elf_Scn *sec, *sec_strndx; |
a2928c42 | 773 | Elf *elf; |
439d473b | 774 | int nr = 0; |
a2928c42 | 775 | |
84087126 | 776 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 777 | if (elf == NULL) { |
6beba7ad | 778 | pr_err("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
779 | goto out_close; |
780 | } | |
781 | ||
782 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
6beba7ad | 783 | pr_err("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
784 | goto out_elf_end; |
785 | } | |
786 | ||
787 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); | |
8ce998d6 | 788 | if (sec == NULL) { |
a25e46c4 ACM |
789 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
790 | if (sec == NULL) | |
8ce998d6 | 791 | goto out_elf_end; |
8ce998d6 | 792 | } |
a2928c42 ACM |
793 | |
794 | syms = elf_getdata(sec, NULL); | |
795 | if (syms == NULL) | |
796 | goto out_elf_end; | |
797 | ||
798 | sec = elf_getscn(elf, shdr.sh_link); | |
799 | if (sec == NULL) | |
800 | goto out_elf_end; | |
801 | ||
802 | symstrs = elf_getdata(sec, NULL); | |
803 | if (symstrs == NULL) | |
804 | goto out_elf_end; | |
805 | ||
6cfcc53e MG |
806 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
807 | if (sec_strndx == NULL) | |
808 | goto out_elf_end; | |
809 | ||
810 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 811 | if (secstrs == NULL) |
6cfcc53e MG |
812 | goto out_elf_end; |
813 | ||
a2928c42 ACM |
814 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
815 | ||
e9fbc9dc | 816 | memset(&sym, 0, sizeof(sym)); |
d20ff6bd MG |
817 | if (!kernel) { |
818 | self->adjust_symbols = (ehdr.e_type == ET_EXEC || | |
30d7a77d ACM |
819 | elf_section_by_name(elf, &ehdr, &shdr, |
820 | ".gnu.prelink_undo", | |
821 | NULL) != NULL); | |
d20ff6bd MG |
822 | } else self->adjust_symbols = 0; |
823 | ||
83a0944f | 824 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 825 | struct symbol *f; |
83a0944f | 826 | const char *elf_name; |
2e538c4a | 827 | char *demangled = NULL; |
6cfcc53e MG |
828 | int is_label = elf_sym__is_label(&sym); |
829 | const char *section_name; | |
a2928c42 | 830 | |
6cfcc53e | 831 | if (!is_label && !elf_sym__is_function(&sym)) |
a2928c42 ACM |
832 | continue; |
833 | ||
834 | sec = elf_getscn(elf, sym.st_shndx); | |
835 | if (!sec) | |
836 | goto out_elf_end; | |
837 | ||
838 | gelf_getshdr(sec, &shdr); | |
6cfcc53e MG |
839 | |
840 | if (is_label && !elf_sec__is_text(&shdr, secstrs)) | |
841 | continue; | |
842 | ||
2e538c4a | 843 | elf_name = elf_sym__name(&sym, symstrs); |
6cfcc53e | 844 | section_name = elf_sec__name(&shdr, secstrs); |
0b73da3f | 845 | |
2e538c4a ACM |
846 | if (kernel || kmodule) { |
847 | char dso_name[PATH_MAX]; | |
848 | ||
849 | if (strcmp(section_name, | |
850 | curr_dso->short_name + dso_name_len) == 0) | |
851 | goto new_symbol; | |
852 | ||
853 | if (strcmp(section_name, ".text") == 0) { | |
854 | curr_map = map; | |
855 | curr_dso = self; | |
856 | goto new_symbol; | |
857 | } | |
858 | ||
859 | snprintf(dso_name, sizeof(dso_name), | |
860 | "%s%s", self->short_name, section_name); | |
861 | ||
862 | curr_map = kernel_maps__find_by_dso_name(dso_name); | |
863 | if (curr_map == NULL) { | |
864 | u64 start = sym.st_value; | |
865 | ||
866 | if (kmodule) | |
867 | start += map->start + shdr.sh_offset; | |
868 | ||
00a192b3 | 869 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
870 | if (curr_dso == NULL) |
871 | goto out_elf_end; | |
3610583c ACM |
872 | curr_map = map__new2(start, curr_dso, |
873 | MAP__FUNCTION); | |
2e538c4a ACM |
874 | if (curr_map == NULL) { |
875 | dso__delete(curr_dso); | |
876 | goto out_elf_end; | |
877 | } | |
ed52ce2e ACM |
878 | curr_map->map_ip = identity__map_ip; |
879 | curr_map->unmap_ip = identity__map_ip; | |
2e538c4a ACM |
880 | curr_dso->origin = DSO__ORIG_KERNEL; |
881 | kernel_maps__insert(curr_map); | |
b0da954a | 882 | dsos__add(&dsos__kernel, curr_dso); |
2e538c4a ACM |
883 | } else |
884 | curr_dso = curr_map->dso; | |
885 | ||
886 | goto new_symbol; | |
af427bf5 ACM |
887 | } |
888 | ||
2e538c4a | 889 | if (curr_dso->adjust_symbols) { |
6beba7ad ACM |
890 | pr_debug2("adjusting symbol: st_value: %Lx sh_addr: " |
891 | "%Lx sh_offset: %Lx\n", (u64)sym.st_value, | |
892 | (u64)shdr.sh_addr, (u64)shdr.sh_offset); | |
f5812a7a | 893 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 894 | } |
28ac909b ACM |
895 | /* |
896 | * We need to figure out if the object was created from C++ sources | |
897 | * DWARF DW_compile_unit has this, but we don't always have access | |
898 | * to it... | |
899 | */ | |
83a0944f | 900 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 901 | if (demangled != NULL) |
83a0944f | 902 | elf_name = demangled; |
2e538c4a | 903 | new_symbol: |
00a192b3 | 904 | f = symbol__new(sym.st_value, sym.st_size, elf_name); |
28ac909b | 905 | free(demangled); |
a2928c42 ACM |
906 | if (!f) |
907 | goto out_elf_end; | |
908 | ||
2e538c4a | 909 | if (filter && filter(curr_map, f)) |
00a192b3 | 910 | symbol__delete(f); |
69ee69f6 | 911 | else { |
6a4694a4 | 912 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
913 | nr++; |
914 | } | |
a2928c42 ACM |
915 | } |
916 | ||
2e538c4a ACM |
917 | /* |
918 | * For misannotated, zeroed, ASM function sizes. | |
919 | */ | |
920 | if (nr > 0) | |
6a4694a4 | 921 | symbols__fixup_end(&self->symbols[map->type]); |
a2928c42 ACM |
922 | err = nr; |
923 | out_elf_end: | |
924 | elf_end(elf); | |
925 | out_close: | |
926 | return err; | |
927 | } | |
928 | ||
78075caa ACM |
929 | static bool dso__build_id_equal(const struct dso *self, u8 *build_id) |
930 | { | |
931 | return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0; | |
932 | } | |
933 | ||
b0da954a | 934 | static bool __dsos__read_build_ids(struct list_head *head) |
57f395a7 | 935 | { |
e30a3d12 | 936 | bool have_build_id = false; |
57f395a7 FW |
937 | struct dso *pos; |
938 | ||
b0da954a | 939 | list_for_each_entry(pos, head, node) |
e30a3d12 ACM |
940 | if (filename__read_build_id(pos->long_name, pos->build_id, |
941 | sizeof(pos->build_id)) > 0) { | |
942 | have_build_id = true; | |
943 | pos->has_build_id = true; | |
944 | } | |
57f395a7 | 945 | |
e30a3d12 | 946 | return have_build_id; |
57f395a7 FW |
947 | } |
948 | ||
b0da954a ACM |
949 | bool dsos__read_build_ids(void) |
950 | { | |
951 | return __dsos__read_build_ids(&dsos__kernel) || | |
952 | __dsos__read_build_ids(&dsos__user); | |
953 | } | |
954 | ||
fd7a346e ACM |
955 | /* |
956 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
957 | */ | |
958 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
959 | ||
2643ce11 | 960 | int filename__read_build_id(const char *filename, void *bf, size_t size) |
4d1e00a8 | 961 | { |
2643ce11 | 962 | int fd, err = -1; |
4d1e00a8 ACM |
963 | GElf_Ehdr ehdr; |
964 | GElf_Shdr shdr; | |
fd7a346e | 965 | Elf_Data *data; |
4d1e00a8 | 966 | Elf_Scn *sec; |
e57cfcda | 967 | Elf_Kind ek; |
fd7a346e | 968 | void *ptr; |
4d1e00a8 | 969 | Elf *elf; |
4d1e00a8 | 970 | |
2643ce11 ACM |
971 | if (size < BUILD_ID_SIZE) |
972 | goto out; | |
973 | ||
974 | fd = open(filename, O_RDONLY); | |
4d1e00a8 ACM |
975 | if (fd < 0) |
976 | goto out; | |
977 | ||
84087126 | 978 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
4d1e00a8 | 979 | if (elf == NULL) { |
8d06367f | 980 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); |
4d1e00a8 ACM |
981 | goto out_close; |
982 | } | |
983 | ||
e57cfcda PE |
984 | ek = elf_kind(elf); |
985 | if (ek != ELF_K_ELF) | |
986 | goto out_elf_end; | |
987 | ||
4d1e00a8 | 988 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 989 | pr_err("%s: cannot get elf header.\n", __func__); |
4d1e00a8 ACM |
990 | goto out_elf_end; |
991 | } | |
992 | ||
2643ce11 ACM |
993 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
994 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
995 | if (sec == NULL) { |
996 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
997 | ".notes", NULL); | |
998 | if (sec == NULL) | |
999 | goto out_elf_end; | |
1000 | } | |
4d1e00a8 | 1001 | |
fd7a346e ACM |
1002 | data = elf_getdata(sec, NULL); |
1003 | if (data == NULL) | |
4d1e00a8 | 1004 | goto out_elf_end; |
fd7a346e ACM |
1005 | |
1006 | ptr = data->d_buf; | |
1007 | while (ptr < (data->d_buf + data->d_size)) { | |
1008 | GElf_Nhdr *nhdr = ptr; | |
1009 | int namesz = NOTE_ALIGN(nhdr->n_namesz), | |
1010 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
1011 | const char *name; | |
1012 | ||
1013 | ptr += sizeof(*nhdr); | |
1014 | name = ptr; | |
1015 | ptr += namesz; | |
1016 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1017 | nhdr->n_namesz == sizeof("GNU")) { | |
1018 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
1019 | memcpy(bf, ptr, BUILD_ID_SIZE); | |
1020 | err = BUILD_ID_SIZE; | |
1021 | break; | |
1022 | } | |
1023 | } | |
1024 | ptr += descsz; | |
1025 | } | |
2643ce11 ACM |
1026 | out_elf_end: |
1027 | elf_end(elf); | |
1028 | out_close: | |
1029 | close(fd); | |
1030 | out: | |
1031 | return err; | |
1032 | } | |
1033 | ||
f1617b40 ACM |
1034 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1035 | { | |
1036 | int fd, err = -1; | |
1037 | ||
1038 | if (size < BUILD_ID_SIZE) | |
1039 | goto out; | |
1040 | ||
1041 | fd = open(filename, O_RDONLY); | |
1042 | if (fd < 0) | |
1043 | goto out; | |
1044 | ||
1045 | while (1) { | |
1046 | char bf[BUFSIZ]; | |
1047 | GElf_Nhdr nhdr; | |
1048 | int namesz, descsz; | |
1049 | ||
1050 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1051 | break; | |
1052 | ||
fd7a346e ACM |
1053 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1054 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1055 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1056 | nhdr.n_namesz == sizeof("GNU")) { | |
1057 | if (read(fd, bf, namesz) != namesz) | |
1058 | break; | |
1059 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
1060 | if (read(fd, build_id, | |
1061 | BUILD_ID_SIZE) == BUILD_ID_SIZE) { | |
1062 | err = 0; | |
1063 | break; | |
1064 | } | |
1065 | } else if (read(fd, bf, descsz) != descsz) | |
1066 | break; | |
1067 | } else { | |
1068 | int n = namesz + descsz; | |
1069 | if (read(fd, bf, n) != n) | |
1070 | break; | |
1071 | } | |
1072 | } | |
1073 | close(fd); | |
1074 | out: | |
1075 | return err; | |
1076 | } | |
1077 | ||
94cb9e38 ACM |
1078 | char dso__symtab_origin(const struct dso *self) |
1079 | { | |
1080 | static const char origin[] = { | |
1081 | [DSO__ORIG_KERNEL] = 'k', | |
1082 | [DSO__ORIG_JAVA_JIT] = 'j', | |
1083 | [DSO__ORIG_FEDORA] = 'f', | |
1084 | [DSO__ORIG_UBUNTU] = 'u', | |
1085 | [DSO__ORIG_BUILDID] = 'b', | |
1086 | [DSO__ORIG_DSO] = 'd', | |
439d473b | 1087 | [DSO__ORIG_KMODULE] = 'K', |
94cb9e38 ACM |
1088 | }; |
1089 | ||
1090 | if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND) | |
1091 | return '!'; | |
1092 | return origin[self->origin]; | |
1093 | } | |
1094 | ||
6beba7ad | 1095 | int dso__load(struct dso *self, struct map *map, symbol_filter_t filter) |
a2928c42 | 1096 | { |
4d1e00a8 | 1097 | int size = PATH_MAX; |
c338aee8 | 1098 | char *name; |
d3379ab9 | 1099 | u8 build_id[BUILD_ID_SIZE]; |
a2928c42 ACM |
1100 | int ret = -1; |
1101 | int fd; | |
1102 | ||
3610583c | 1103 | dso__set_loaded(self, map->type); |
66bd8424 | 1104 | |
c338aee8 ACM |
1105 | if (self->kernel) |
1106 | return dso__load_kernel_sym(self, map, filter); | |
1107 | ||
1108 | name = malloc(size); | |
a2928c42 ACM |
1109 | if (!name) |
1110 | return -1; | |
1111 | ||
30d7a77d | 1112 | self->adjust_symbols = 0; |
f5812a7a | 1113 | |
94cb9e38 | 1114 | if (strncmp(self->name, "/tmp/perf-", 10) == 0) { |
6beba7ad | 1115 | ret = dso__load_perf_map(self, map, filter); |
94cb9e38 ACM |
1116 | self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : |
1117 | DSO__ORIG_NOT_FOUND; | |
1118 | return ret; | |
1119 | } | |
1120 | ||
1121 | self->origin = DSO__ORIG_FEDORA - 1; | |
80d496be | 1122 | |
a2928c42 ACM |
1123 | more: |
1124 | do { | |
94cb9e38 ACM |
1125 | self->origin++; |
1126 | switch (self->origin) { | |
1127 | case DSO__ORIG_FEDORA: | |
439d473b ACM |
1128 | snprintf(name, size, "/usr/lib/debug%s.debug", |
1129 | self->long_name); | |
a2928c42 | 1130 | break; |
94cb9e38 | 1131 | case DSO__ORIG_UBUNTU: |
439d473b ACM |
1132 | snprintf(name, size, "/usr/lib/debug%s", |
1133 | self->long_name); | |
a2928c42 | 1134 | break; |
94cb9e38 | 1135 | case DSO__ORIG_BUILDID: |
d3379ab9 ACM |
1136 | if (filename__read_build_id(self->long_name, build_id, |
1137 | sizeof(build_id))) { | |
1138 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; | |
1139 | ||
1140 | build_id__sprintf(build_id, sizeof(build_id), | |
1141 | build_id_hex); | |
4d1e00a8 ACM |
1142 | snprintf(name, size, |
1143 | "/usr/lib/debug/.build-id/%.2s/%s.debug", | |
d3379ab9 ACM |
1144 | build_id_hex, build_id_hex + 2); |
1145 | if (self->has_build_id) | |
1146 | goto compare_build_id; | |
1147 | break; | |
4d1e00a8 | 1148 | } |
94cb9e38 | 1149 | self->origin++; |
4d1e00a8 | 1150 | /* Fall thru */ |
94cb9e38 | 1151 | case DSO__ORIG_DSO: |
439d473b | 1152 | snprintf(name, size, "%s", self->long_name); |
a2928c42 ACM |
1153 | break; |
1154 | ||
1155 | default: | |
1156 | goto out; | |
1157 | } | |
a2928c42 | 1158 | |
8d06367f | 1159 | if (self->has_build_id) { |
d3379ab9 ACM |
1160 | if (filename__read_build_id(name, build_id, |
1161 | sizeof(build_id)) < 0) | |
8d06367f | 1162 | goto more; |
8d06367f | 1163 | compare_build_id: |
78075caa | 1164 | if (!dso__build_id_equal(self, build_id)) |
8d06367f ACM |
1165 | goto more; |
1166 | } | |
1167 | ||
a2928c42 ACM |
1168 | fd = open(name, O_RDONLY); |
1169 | } while (fd < 0); | |
1170 | ||
6beba7ad | 1171 | ret = dso__load_sym(self, map, name, fd, filter, 0, 0); |
a2928c42 ACM |
1172 | close(fd); |
1173 | ||
1174 | /* | |
1175 | * Some people seem to have debuginfo files _WITHOUT_ debug info!?!? | |
1176 | */ | |
1177 | if (!ret) | |
1178 | goto more; | |
1179 | ||
a25e46c4 | 1180 | if (ret > 0) { |
82164161 | 1181 | int nr_plt = dso__synthesize_plt_symbols(self, map, filter); |
a25e46c4 ACM |
1182 | if (nr_plt > 0) |
1183 | ret += nr_plt; | |
1184 | } | |
a2928c42 ACM |
1185 | out: |
1186 | free(name); | |
1340e6bb ACM |
1187 | if (ret < 0 && strstr(self->name, " (deleted)") != NULL) |
1188 | return 0; | |
a2928c42 ACM |
1189 | return ret; |
1190 | } | |
1191 | ||
439d473b | 1192 | static void kernel_maps__insert(struct map *map) |
6cfcc53e | 1193 | { |
61f37a82 | 1194 | maps__insert(&kernel_maps__functions, map); |
439d473b | 1195 | } |
6cfcc53e | 1196 | |
fcf1203a ACM |
1197 | struct symbol *kernel_maps__find_function(u64 ip, struct map **mapp, |
1198 | symbol_filter_t filter) | |
439d473b | 1199 | { |
61f37a82 | 1200 | struct map *map = maps__find(&kernel_maps__functions, ip); |
2e538c4a ACM |
1201 | |
1202 | if (mapp) | |
1203 | *mapp = map; | |
439d473b ACM |
1204 | |
1205 | if (map) { | |
1206 | ip = map->map_ip(map, ip); | |
6a4694a4 | 1207 | return map__find_symbol(map, ip, filter); |
b32d133a | 1208 | } else |
61f37a82 | 1209 | WARN_ONCE(RB_EMPTY_ROOT(&kernel_maps__functions), |
b32d133a | 1210 | "Empty kernel_maps, was symbol__init() called?\n"); |
6cfcc53e | 1211 | |
2e538c4a | 1212 | return NULL; |
439d473b ACM |
1213 | } |
1214 | ||
1215 | struct map *kernel_maps__find_by_dso_name(const char *name) | |
1216 | { | |
1217 | struct rb_node *nd; | |
1218 | ||
61f37a82 | 1219 | for (nd = rb_first(&kernel_maps__functions); nd; nd = rb_next(nd)) { |
439d473b ACM |
1220 | struct map *map = rb_entry(nd, struct map, rb_node); |
1221 | ||
1222 | if (map->dso && strcmp(map->dso->name, name) == 0) | |
1223 | return map; | |
1224 | } | |
1225 | ||
1226 | return NULL; | |
1227 | } | |
1228 | ||
c338aee8 | 1229 | static int dsos__set_modules_path_dir(char *dirname) |
6cfcc53e | 1230 | { |
439d473b | 1231 | struct dirent *dent; |
439d473b | 1232 | DIR *dir = opendir(dirname); |
6cfcc53e | 1233 | |
439d473b | 1234 | if (!dir) { |
87f8ea4c | 1235 | pr_debug("%s: cannot open %s dir\n", __func__, dirname); |
439d473b ACM |
1236 | return -1; |
1237 | } | |
6cfcc53e | 1238 | |
439d473b ACM |
1239 | while ((dent = readdir(dir)) != NULL) { |
1240 | char path[PATH_MAX]; | |
1241 | ||
1242 | if (dent->d_type == DT_DIR) { | |
1243 | if (!strcmp(dent->d_name, ".") || | |
1244 | !strcmp(dent->d_name, "..")) | |
1245 | continue; | |
1246 | ||
1247 | snprintf(path, sizeof(path), "%s/%s", | |
1248 | dirname, dent->d_name); | |
c338aee8 | 1249 | if (dsos__set_modules_path_dir(path) < 0) |
439d473b ACM |
1250 | goto failure; |
1251 | } else { | |
1252 | char *dot = strrchr(dent->d_name, '.'), | |
1253 | dso_name[PATH_MAX]; | |
1254 | struct map *map; | |
cfc10d3b | 1255 | char *long_name; |
439d473b ACM |
1256 | |
1257 | if (dot == NULL || strcmp(dot, ".ko")) | |
1258 | continue; | |
1259 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1260 | (int)(dot - dent->d_name), dent->d_name); | |
1261 | ||
a2a99e8e | 1262 | strxfrchar(dso_name, '-', '_'); |
439d473b ACM |
1263 | map = kernel_maps__find_by_dso_name(dso_name); |
1264 | if (map == NULL) | |
1265 | continue; | |
1266 | ||
1267 | snprintf(path, sizeof(path), "%s/%s", | |
1268 | dirname, dent->d_name); | |
1269 | ||
cfc10d3b ACM |
1270 | long_name = strdup(path); |
1271 | if (long_name == NULL) | |
439d473b | 1272 | goto failure; |
cfc10d3b | 1273 | dso__set_long_name(map->dso, long_name); |
439d473b | 1274 | } |
439d473b | 1275 | } |
6cfcc53e | 1276 | |
c338aee8 | 1277 | return 0; |
439d473b ACM |
1278 | failure: |
1279 | closedir(dir); | |
1280 | return -1; | |
1281 | } | |
6cfcc53e | 1282 | |
c338aee8 | 1283 | static int dsos__set_modules_path(void) |
439d473b ACM |
1284 | { |
1285 | struct utsname uts; | |
1286 | char modules_path[PATH_MAX]; | |
6cfcc53e | 1287 | |
439d473b ACM |
1288 | if (uname(&uts) < 0) |
1289 | return -1; | |
6cfcc53e | 1290 | |
439d473b ACM |
1291 | snprintf(modules_path, sizeof(modules_path), "/lib/modules/%s/kernel", |
1292 | uts.release); | |
6cfcc53e | 1293 | |
c338aee8 | 1294 | return dsos__set_modules_path_dir(modules_path); |
6cfcc53e MG |
1295 | } |
1296 | ||
439d473b ACM |
1297 | /* |
1298 | * Constructor variant for modules (where we know from /proc/modules where | |
1299 | * they are loaded) and for vmlinux, where only after we load all the | |
1300 | * symbols we'll know where it starts and ends. | |
1301 | */ | |
3610583c | 1302 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1303 | { |
439d473b | 1304 | struct map *self = malloc(sizeof(*self)); |
6cfcc53e | 1305 | |
439d473b | 1306 | if (self != NULL) { |
439d473b | 1307 | /* |
afb7b4f0 | 1308 | * ->end will be filled after we load all the symbols |
439d473b | 1309 | */ |
3610583c | 1310 | map__init(self, type, start, 0, 0, dso); |
439d473b | 1311 | } |
afb7b4f0 | 1312 | |
439d473b ACM |
1313 | return self; |
1314 | } | |
1315 | ||
c338aee8 | 1316 | static int kernel_maps__create_module_maps(void) |
439d473b ACM |
1317 | { |
1318 | char *line = NULL; | |
1319 | size_t n; | |
1320 | FILE *file = fopen("/proc/modules", "r"); | |
1321 | struct map *map; | |
6cfcc53e | 1322 | |
439d473b ACM |
1323 | if (file == NULL) |
1324 | return -1; | |
6cfcc53e | 1325 | |
439d473b ACM |
1326 | while (!feof(file)) { |
1327 | char name[PATH_MAX]; | |
1328 | u64 start; | |
1329 | struct dso *dso; | |
1330 | char *sep; | |
1331 | int line_len; | |
6cfcc53e | 1332 | |
439d473b ACM |
1333 | line_len = getline(&line, &n, file); |
1334 | if (line_len < 0) | |
1335 | break; | |
1336 | ||
1337 | if (!line) | |
1338 | goto out_failure; | |
1339 | ||
1340 | line[--line_len] = '\0'; /* \n */ | |
1341 | ||
1342 | sep = strrchr(line, 'x'); | |
1343 | if (sep == NULL) | |
1344 | continue; | |
1345 | ||
1346 | hex2u64(sep + 1, &start); | |
1347 | ||
1348 | sep = strchr(line, ' '); | |
1349 | if (sep == NULL) | |
1350 | continue; | |
1351 | ||
1352 | *sep = '\0'; | |
1353 | ||
1354 | snprintf(name, sizeof(name), "[%s]", line); | |
00a192b3 | 1355 | dso = dso__new(name); |
439d473b ACM |
1356 | |
1357 | if (dso == NULL) | |
1358 | goto out_delete_line; | |
1359 | ||
3610583c | 1360 | map = map__new2(start, dso, MAP__FUNCTION); |
439d473b ACM |
1361 | if (map == NULL) { |
1362 | dso__delete(dso); | |
1363 | goto out_delete_line; | |
6cfcc53e | 1364 | } |
439d473b | 1365 | |
f1617b40 ACM |
1366 | snprintf(name, sizeof(name), |
1367 | "/sys/module/%s/notes/.note.gnu.build-id", line); | |
1368 | if (sysfs__read_build_id(name, dso->build_id, | |
1369 | sizeof(dso->build_id)) == 0) | |
1370 | dso->has_build_id = true; | |
1371 | ||
439d473b ACM |
1372 | dso->origin = DSO__ORIG_KMODULE; |
1373 | kernel_maps__insert(map); | |
b0da954a | 1374 | dsos__add(&dsos__kernel, dso); |
6cfcc53e | 1375 | } |
439d473b ACM |
1376 | |
1377 | free(line); | |
1378 | fclose(file); | |
1379 | ||
c338aee8 | 1380 | return dsos__set_modules_path(); |
439d473b ACM |
1381 | |
1382 | out_delete_line: | |
1383 | free(line); | |
1384 | out_failure: | |
1385 | return -1; | |
6cfcc53e MG |
1386 | } |
1387 | ||
439d473b | 1388 | static int dso__load_vmlinux(struct dso *self, struct map *map, |
6beba7ad | 1389 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1390 | { |
fbd733b8 | 1391 | int err = -1, fd; |
a2928c42 | 1392 | |
fbd733b8 ACM |
1393 | if (self->has_build_id) { |
1394 | u8 build_id[BUILD_ID_SIZE]; | |
1395 | ||
1396 | if (filename__read_build_id(vmlinux, build_id, | |
1397 | sizeof(build_id)) < 0) { | |
1398 | pr_debug("No build_id in %s, ignoring it\n", vmlinux); | |
1399 | return -1; | |
1400 | } | |
1401 | if (!dso__build_id_equal(self, build_id)) { | |
1402 | char expected_build_id[BUILD_ID_SIZE * 2 + 1], | |
1403 | vmlinux_build_id[BUILD_ID_SIZE * 2 + 1]; | |
1404 | ||
1405 | build_id__sprintf(self->build_id, | |
1406 | sizeof(self->build_id), | |
1407 | expected_build_id); | |
1408 | build_id__sprintf(build_id, sizeof(build_id), | |
1409 | vmlinux_build_id); | |
1410 | pr_debug("build_id in %s is %s while expected is %s, " | |
1411 | "ignoring it\n", vmlinux, vmlinux_build_id, | |
1412 | expected_build_id); | |
1413 | return -1; | |
1414 | } | |
1415 | } | |
66bd8424 | 1416 | |
fbd733b8 | 1417 | fd = open(vmlinux, O_RDONLY); |
a2928c42 ACM |
1418 | if (fd < 0) |
1419 | return -1; | |
1420 | ||
3610583c | 1421 | dso__set_loaded(self, map->type); |
6beba7ad | 1422 | err = dso__load_sym(self, map, self->long_name, fd, filter, 1, 0); |
6cfcc53e | 1423 | |
a2928c42 ACM |
1424 | close(fd); |
1425 | ||
1426 | return err; | |
1427 | } | |
1428 | ||
c338aee8 ACM |
1429 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
1430 | symbol_filter_t filter) | |
a827c875 | 1431 | { |
cc612d81 ACM |
1432 | int err; |
1433 | bool is_kallsyms; | |
1434 | ||
1435 | if (vmlinux_path != NULL) { | |
1436 | int i; | |
1437 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
1438 | vmlinux_path__nr_entries); | |
1439 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
1440 | err = dso__load_vmlinux(self, map, vmlinux_path[i], | |
1441 | filter); | |
1442 | if (err > 0) { | |
1443 | pr_debug("Using %s for symbols\n", | |
1444 | vmlinux_path[i]); | |
1445 | dso__set_long_name(self, | |
1446 | strdup(vmlinux_path[i])); | |
1447 | goto out_fixup; | |
1448 | } | |
1449 | } | |
1450 | } | |
1451 | ||
1452 | is_kallsyms = self->long_name[0] == '['; | |
1453 | if (is_kallsyms) | |
1454 | goto do_kallsyms; | |
439d473b | 1455 | |
cc612d81 | 1456 | err = dso__load_vmlinux(self, map, self->long_name, filter); |
ef6ae724 | 1457 | if (err <= 0) { |
cc612d81 ACM |
1458 | pr_info("The file %s cannot be used, " |
1459 | "trying to use /proc/kallsyms...", self->long_name); | |
cc612d81 | 1460 | do_kallsyms: |
4e06255f | 1461 | err = dso__load_kallsyms(self, map, filter); |
cc612d81 | 1462 | if (err > 0 && !is_kallsyms) |
ef6ae724 ACM |
1463 | dso__set_long_name(self, strdup("[kernel.kallsyms]")); |
1464 | } | |
439d473b ACM |
1465 | |
1466 | if (err > 0) { | |
cc612d81 | 1467 | out_fixup: |
6a4694a4 ACM |
1468 | map__fixup_start(map); |
1469 | map__fixup_end(map); | |
439d473b | 1470 | } |
94cb9e38 | 1471 | |
a827c875 ACM |
1472 | return err; |
1473 | } | |
1474 | ||
b0da954a ACM |
1475 | LIST_HEAD(dsos__user); |
1476 | LIST_HEAD(dsos__kernel); | |
cc612d81 | 1477 | struct dso *vdso; |
cd84c2ac | 1478 | |
b0da954a | 1479 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 1480 | { |
b0da954a | 1481 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
1482 | } |
1483 | ||
b0da954a | 1484 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
1485 | { |
1486 | struct dso *pos; | |
1487 | ||
b0da954a | 1488 | list_for_each_entry(pos, head, node) |
cd84c2ac FW |
1489 | if (strcmp(pos->name, name) == 0) |
1490 | return pos; | |
1491 | return NULL; | |
1492 | } | |
1493 | ||
00a192b3 | 1494 | struct dso *dsos__findnew(const char *name) |
cd84c2ac | 1495 | { |
b0da954a | 1496 | struct dso *dso = dsos__find(&dsos__user, name); |
cd84c2ac | 1497 | |
e4204992 | 1498 | if (!dso) { |
00a192b3 | 1499 | dso = dso__new(name); |
cfc10d3b | 1500 | if (dso != NULL) { |
b0da954a | 1501 | dsos__add(&dsos__user, dso); |
cfc10d3b ACM |
1502 | dso__set_basename(dso); |
1503 | } | |
66bd8424 | 1504 | } |
cd84c2ac FW |
1505 | |
1506 | return dso; | |
cd84c2ac FW |
1507 | } |
1508 | ||
b0da954a | 1509 | static void __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
1510 | { |
1511 | struct dso *pos; | |
1512 | ||
b0da954a | 1513 | list_for_each_entry(pos, head, node) |
cd84c2ac FW |
1514 | dso__fprintf(pos, fp); |
1515 | } | |
1516 | ||
b0da954a ACM |
1517 | void dsos__fprintf(FILE *fp) |
1518 | { | |
1519 | __dsos__fprintf(&dsos__kernel, fp); | |
1520 | __dsos__fprintf(&dsos__user, fp); | |
1521 | } | |
1522 | ||
1523 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp) | |
9e03eb2d ACM |
1524 | { |
1525 | struct dso *pos; | |
1526 | size_t ret = 0; | |
1527 | ||
b0da954a | 1528 | list_for_each_entry(pos, head, node) { |
9e03eb2d | 1529 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 1530 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
1531 | } |
1532 | return ret; | |
1533 | } | |
1534 | ||
b0da954a ACM |
1535 | size_t dsos__fprintf_buildid(FILE *fp) |
1536 | { | |
1537 | return (__dsos__fprintf_buildid(&dsos__kernel, fp) + | |
1538 | __dsos__fprintf_buildid(&dsos__user, fp)); | |
1539 | } | |
1540 | ||
b32d133a | 1541 | static int kernel_maps__create_kernel_map(const struct symbol_conf *conf) |
cd84c2ac | 1542 | { |
4e06255f | 1543 | struct map *kmap; |
b32d133a | 1544 | struct dso *kernel = dso__new(conf->vmlinux_name ?: "[kernel.kallsyms]"); |
cd84c2ac | 1545 | |
2446042c | 1546 | if (kernel == NULL) |
c338aee8 ACM |
1547 | return -1; |
1548 | ||
4e06255f ACM |
1549 | kmap = map__new2(0, kernel, MAP__FUNCTION); |
1550 | if (kmap == NULL) | |
c338aee8 ACM |
1551 | goto out_delete_kernel_dso; |
1552 | ||
4e06255f ACM |
1553 | kmap->map_ip = kmap->unmap_ip = identity__map_ip; |
1554 | kernel->short_name = "[kernel]"; | |
1555 | kernel->kernel = 1; | |
2446042c | 1556 | |
00a192b3 | 1557 | vdso = dso__new("[vdso]"); |
c338aee8 ACM |
1558 | if (vdso == NULL) |
1559 | goto out_delete_kernel_map; | |
3610583c | 1560 | dso__set_loaded(vdso, MAP__FUNCTION); |
2446042c ACM |
1561 | |
1562 | if (sysfs__read_build_id("/sys/kernel/notes", kernel->build_id, | |
1563 | sizeof(kernel->build_id)) == 0) | |
1564 | kernel->has_build_id = true; | |
cd84c2ac | 1565 | |
4e06255f | 1566 | kernel_maps__insert(kmap); |
b0da954a ACM |
1567 | dsos__add(&dsos__kernel, kernel); |
1568 | dsos__add(&dsos__user, vdso); | |
cd84c2ac | 1569 | |
c338aee8 ACM |
1570 | return 0; |
1571 | ||
1572 | out_delete_kernel_map: | |
4e06255f | 1573 | map__delete(kmap); |
c338aee8 ACM |
1574 | out_delete_kernel_dso: |
1575 | dso__delete(kernel); | |
1576 | return -1; | |
2446042c ACM |
1577 | } |
1578 | ||
cc612d81 ACM |
1579 | static void vmlinux_path__exit(void) |
1580 | { | |
1581 | while (--vmlinux_path__nr_entries >= 0) { | |
1582 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
1583 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
1584 | } | |
1585 | ||
1586 | free(vmlinux_path); | |
1587 | vmlinux_path = NULL; | |
1588 | } | |
1589 | ||
1590 | static int vmlinux_path__init(void) | |
1591 | { | |
1592 | struct utsname uts; | |
1593 | char bf[PATH_MAX]; | |
1594 | ||
1595 | if (uname(&uts) < 0) | |
1596 | return -1; | |
1597 | ||
1598 | vmlinux_path = malloc(sizeof(char *) * 5); | |
1599 | if (vmlinux_path == NULL) | |
1600 | return -1; | |
1601 | ||
1602 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
1603 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1604 | goto out_fail; | |
1605 | ++vmlinux_path__nr_entries; | |
1606 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
1607 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1608 | goto out_fail; | |
1609 | ++vmlinux_path__nr_entries; | |
1610 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); | |
1611 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1612 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1613 | goto out_fail; | |
1614 | ++vmlinux_path__nr_entries; | |
1615 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
1616 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1617 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1618 | goto out_fail; | |
1619 | ++vmlinux_path__nr_entries; | |
1620 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
1621 | uts.release); | |
1622 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1623 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1624 | goto out_fail; | |
1625 | ++vmlinux_path__nr_entries; | |
1626 | ||
1627 | return 0; | |
1628 | ||
1629 | out_fail: | |
1630 | vmlinux_path__exit(); | |
1631 | return -1; | |
1632 | } | |
1633 | ||
b32d133a | 1634 | static int kernel_maps__init(const struct symbol_conf *conf) |
2446042c | 1635 | { |
b32d133a ACM |
1636 | const struct symbol_conf *pconf = conf ?: &symbol_conf__defaults; |
1637 | ||
1638 | symbol__priv_size = pconf->priv_size; | |
1639 | ||
1640 | if (pconf->try_vmlinux_path && vmlinux_path__init() < 0) | |
2446042c ACM |
1641 | return -1; |
1642 | ||
b32d133a | 1643 | if (kernel_maps__create_kernel_map(pconf) < 0) { |
cc612d81 ACM |
1644 | vmlinux_path__exit(); |
1645 | return -1; | |
1646 | } | |
1647 | ||
b32d133a | 1648 | if (pconf->use_modules && kernel_maps__create_module_maps() < 0) |
87f8ea4c ACM |
1649 | pr_debug("Failed to load list of modules in use, " |
1650 | "continuing...\n"); | |
90c83218 ACM |
1651 | /* |
1652 | * Now that we have all the maps created, just set the ->end of them: | |
1653 | */ | |
1654 | kernel_maps__fixup_end(); | |
6671cb16 | 1655 | return 0; |
cd84c2ac FW |
1656 | } |
1657 | ||
b32d133a | 1658 | int symbol__init(struct symbol_conf *conf) |
a2928c42 ACM |
1659 | { |
1660 | elf_version(EV_CURRENT); | |
b32d133a | 1661 | return kernel_maps__init(conf); |
a2928c42 | 1662 | } |