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Commit | Line | Data |
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a2928c42 ACM |
1 | #include "util.h" |
2 | #include "../perf.h" | |
655000e7 | 3 | #include "sort.h" |
a0055ae2 | 4 | #include "string.h" |
a2928c42 | 5 | #include "symbol.h" |
439d473b | 6 | #include "thread.h" |
a2928c42 | 7 | |
8f28827a FW |
8 | #include "debug.h" |
9 | ||
b32d133a | 10 | #include <asm/bug.h> |
a2928c42 ACM |
11 | #include <libelf.h> |
12 | #include <gelf.h> | |
13 | #include <elf.h> | |
f1617b40 | 14 | #include <limits.h> |
439d473b | 15 | #include <sys/utsname.h> |
2cdbc46d | 16 | |
c12e15e7 ACM |
17 | #ifndef NT_GNU_BUILD_ID |
18 | #define NT_GNU_BUILD_ID 3 | |
19 | #endif | |
20 | ||
94cb9e38 ACM |
21 | enum dso_origin { |
22 | DSO__ORIG_KERNEL = 0, | |
23 | DSO__ORIG_JAVA_JIT, | |
4cf40131 | 24 | DSO__ORIG_BUILD_ID_CACHE, |
94cb9e38 ACM |
25 | DSO__ORIG_FEDORA, |
26 | DSO__ORIG_UBUNTU, | |
27 | DSO__ORIG_BUILDID, | |
28 | DSO__ORIG_DSO, | |
439d473b | 29 | DSO__ORIG_KMODULE, |
94cb9e38 ACM |
30 | DSO__ORIG_NOT_FOUND, |
31 | }; | |
32 | ||
b0da954a | 33 | static void dsos__add(struct list_head *head, struct dso *dso); |
3610583c | 34 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type); |
c338aee8 | 35 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
9de89fe7 | 36 | symbol_filter_t filter); |
cc612d81 ACM |
37 | static int vmlinux_path__nr_entries; |
38 | static char **vmlinux_path; | |
439d473b | 39 | |
75be6cf4 | 40 | struct symbol_conf symbol_conf = { |
d599db3f | 41 | .exclude_other = true, |
b32d133a ACM |
42 | .use_modules = true, |
43 | .try_vmlinux_path = true, | |
44 | }; | |
45 | ||
3610583c ACM |
46 | bool dso__loaded(const struct dso *self, enum map_type type) |
47 | { | |
48 | return self->loaded & (1 << type); | |
49 | } | |
50 | ||
79406cd7 ACM |
51 | bool dso__sorted_by_name(const struct dso *self, enum map_type type) |
52 | { | |
53 | return self->sorted_by_name & (1 << type); | |
54 | } | |
55 | ||
3610583c ACM |
56 | static void dso__set_loaded(struct dso *self, enum map_type type) |
57 | { | |
58 | self->loaded |= (1 << type); | |
59 | } | |
60 | ||
79406cd7 ACM |
61 | static void dso__set_sorted_by_name(struct dso *self, enum map_type type) |
62 | { | |
63 | self->sorted_by_name |= (1 << type); | |
64 | } | |
65 | ||
36a3e646 | 66 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee ACM |
67 | { |
68 | switch (map_type) { | |
69 | case MAP__FUNCTION: | |
70 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 ACM |
71 | case MAP__VARIABLE: |
72 | return symbol_type == 'D' || symbol_type == 'd'; | |
6893d4ee ACM |
73 | default: |
74 | return false; | |
75 | } | |
76 | } | |
77 | ||
fcf1203a | 78 | static void symbols__fixup_end(struct rb_root *self) |
af427bf5 | 79 | { |
fcf1203a | 80 | struct rb_node *nd, *prevnd = rb_first(self); |
2e538c4a | 81 | struct symbol *curr, *prev; |
af427bf5 ACM |
82 | |
83 | if (prevnd == NULL) | |
84 | return; | |
85 | ||
2e538c4a ACM |
86 | curr = rb_entry(prevnd, struct symbol, rb_node); |
87 | ||
af427bf5 | 88 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
89 | prev = curr; |
90 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 ACM |
91 | |
92 | if (prev->end == prev->start) | |
93 | prev->end = curr->start - 1; | |
af427bf5 | 94 | } |
2e538c4a ACM |
95 | |
96 | /* Last entry */ | |
97 | if (curr->end == curr->start) | |
98 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
99 | } |
100 | ||
9958e1f0 | 101 | static void __map_groups__fixup_end(struct map_groups *self, enum map_type type) |
af427bf5 ACM |
102 | { |
103 | struct map *prev, *curr; | |
95011c60 | 104 | struct rb_node *nd, *prevnd = rb_first(&self->maps[type]); |
af427bf5 ACM |
105 | |
106 | if (prevnd == NULL) | |
107 | return; | |
108 | ||
109 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
110 | |
111 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
112 | prev = curr; | |
113 | curr = rb_entry(nd, struct map, rb_node); | |
114 | prev->end = curr->start - 1; | |
2e538c4a | 115 | } |
90c83218 ACM |
116 | |
117 | /* | |
118 | * We still haven't the actual symbols, so guess the | |
119 | * last map final address. | |
120 | */ | |
121 | curr->end = ~0UL; | |
af427bf5 ACM |
122 | } |
123 | ||
9958e1f0 | 124 | static void map_groups__fixup_end(struct map_groups *self) |
23ea4a3f ACM |
125 | { |
126 | int i; | |
127 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
9958e1f0 | 128 | __map_groups__fixup_end(self, i); |
23ea4a3f ACM |
129 | } |
130 | ||
00a192b3 | 131 | static struct symbol *symbol__new(u64 start, u64 len, const char *name) |
a2928c42 | 132 | { |
0085c954 | 133 | size_t namelen = strlen(name) + 1; |
75be6cf4 | 134 | struct symbol *self = zalloc(symbol_conf.priv_size + |
36479484 ACM |
135 | sizeof(*self) + namelen); |
136 | if (self == NULL) | |
0b73da3f IM |
137 | return NULL; |
138 | ||
75be6cf4 ACM |
139 | if (symbol_conf.priv_size) |
140 | self = ((void *)self) + symbol_conf.priv_size; | |
36479484 | 141 | |
0b73da3f | 142 | self->start = start; |
6cfcc53e | 143 | self->end = len ? start + len - 1 : start; |
e4204992 | 144 | |
6beba7ad | 145 | pr_debug3("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end); |
e4204992 | 146 | |
0b73da3f | 147 | memcpy(self->name, name, namelen); |
a2928c42 ACM |
148 | |
149 | return self; | |
150 | } | |
151 | ||
00a192b3 | 152 | static void symbol__delete(struct symbol *self) |
a2928c42 | 153 | { |
75be6cf4 | 154 | free(((void *)self) - symbol_conf.priv_size); |
a2928c42 ACM |
155 | } |
156 | ||
157 | static size_t symbol__fprintf(struct symbol *self, FILE *fp) | |
158 | { | |
439d473b | 159 | return fprintf(fp, " %llx-%llx %s\n", |
a2928c42 ACM |
160 | self->start, self->end, self->name); |
161 | } | |
162 | ||
b7cece76 | 163 | void dso__set_long_name(struct dso *self, char *name) |
cfc10d3b | 164 | { |
ef6ae724 ACM |
165 | if (name == NULL) |
166 | return; | |
cfc10d3b ACM |
167 | self->long_name = name; |
168 | self->long_name_len = strlen(name); | |
169 | } | |
170 | ||
171 | static void dso__set_basename(struct dso *self) | |
172 | { | |
173 | self->short_name = basename(self->long_name); | |
174 | } | |
175 | ||
00a192b3 | 176 | struct dso *dso__new(const char *name) |
a2928c42 | 177 | { |
b7cece76 | 178 | struct dso *self = zalloc(sizeof(*self) + strlen(name) + 1); |
a2928c42 ACM |
179 | |
180 | if (self != NULL) { | |
6a4694a4 | 181 | int i; |
a2928c42 | 182 | strcpy(self->name, name); |
cfc10d3b | 183 | dso__set_long_name(self, self->name); |
439d473b | 184 | self->short_name = self->name; |
6a4694a4 | 185 | for (i = 0; i < MAP__NR_TYPES; ++i) |
79406cd7 | 186 | self->symbols[i] = self->symbol_names[i] = RB_ROOT; |
52d422de | 187 | self->slen_calculated = 0; |
94cb9e38 | 188 | self->origin = DSO__ORIG_NOT_FOUND; |
8d06367f | 189 | self->loaded = 0; |
79406cd7 | 190 | self->sorted_by_name = 0; |
8d06367f | 191 | self->has_build_id = 0; |
a2928c42 ACM |
192 | } |
193 | ||
194 | return self; | |
195 | } | |
196 | ||
fcf1203a | 197 | static void symbols__delete(struct rb_root *self) |
a2928c42 ACM |
198 | { |
199 | struct symbol *pos; | |
fcf1203a | 200 | struct rb_node *next = rb_first(self); |
a2928c42 ACM |
201 | |
202 | while (next) { | |
203 | pos = rb_entry(next, struct symbol, rb_node); | |
204 | next = rb_next(&pos->rb_node); | |
fcf1203a | 205 | rb_erase(&pos->rb_node, self); |
00a192b3 | 206 | symbol__delete(pos); |
a2928c42 ACM |
207 | } |
208 | } | |
209 | ||
210 | void dso__delete(struct dso *self) | |
211 | { | |
6a4694a4 ACM |
212 | int i; |
213 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
214 | symbols__delete(&self->symbols[i]); | |
439d473b ACM |
215 | if (self->long_name != self->name) |
216 | free(self->long_name); | |
a2928c42 ACM |
217 | free(self); |
218 | } | |
219 | ||
8d06367f ACM |
220 | void dso__set_build_id(struct dso *self, void *build_id) |
221 | { | |
222 | memcpy(self->build_id, build_id, sizeof(self->build_id)); | |
223 | self->has_build_id = 1; | |
224 | } | |
225 | ||
fcf1203a | 226 | static void symbols__insert(struct rb_root *self, struct symbol *sym) |
a2928c42 | 227 | { |
fcf1203a | 228 | struct rb_node **p = &self->rb_node; |
a2928c42 | 229 | struct rb_node *parent = NULL; |
9cffa8d5 | 230 | const u64 ip = sym->start; |
a2928c42 ACM |
231 | struct symbol *s; |
232 | ||
233 | while (*p != NULL) { | |
234 | parent = *p; | |
235 | s = rb_entry(parent, struct symbol, rb_node); | |
236 | if (ip < s->start) | |
237 | p = &(*p)->rb_left; | |
238 | else | |
239 | p = &(*p)->rb_right; | |
240 | } | |
241 | rb_link_node(&sym->rb_node, parent, p); | |
fcf1203a | 242 | rb_insert_color(&sym->rb_node, self); |
a2928c42 ACM |
243 | } |
244 | ||
fcf1203a | 245 | static struct symbol *symbols__find(struct rb_root *self, u64 ip) |
a2928c42 ACM |
246 | { |
247 | struct rb_node *n; | |
248 | ||
249 | if (self == NULL) | |
250 | return NULL; | |
251 | ||
fcf1203a | 252 | n = self->rb_node; |
a2928c42 ACM |
253 | |
254 | while (n) { | |
255 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
256 | ||
257 | if (ip < s->start) | |
258 | n = n->rb_left; | |
259 | else if (ip > s->end) | |
260 | n = n->rb_right; | |
261 | else | |
262 | return s; | |
263 | } | |
264 | ||
265 | return NULL; | |
266 | } | |
267 | ||
79406cd7 ACM |
268 | struct symbol_name_rb_node { |
269 | struct rb_node rb_node; | |
270 | struct symbol sym; | |
271 | }; | |
272 | ||
273 | static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym) | |
274 | { | |
275 | struct rb_node **p = &self->rb_node; | |
276 | struct rb_node *parent = NULL; | |
277 | struct symbol_name_rb_node *symn = ((void *)sym) - sizeof(*parent), *s; | |
278 | ||
279 | while (*p != NULL) { | |
280 | parent = *p; | |
281 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
282 | if (strcmp(sym->name, s->sym.name) < 0) | |
283 | p = &(*p)->rb_left; | |
284 | else | |
285 | p = &(*p)->rb_right; | |
286 | } | |
287 | rb_link_node(&symn->rb_node, parent, p); | |
288 | rb_insert_color(&symn->rb_node, self); | |
289 | } | |
290 | ||
291 | static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source) | |
292 | { | |
293 | struct rb_node *nd; | |
294 | ||
295 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
296 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
297 | symbols__insert_by_name(self, pos); | |
298 | } | |
299 | } | |
300 | ||
301 | static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name) | |
302 | { | |
303 | struct rb_node *n; | |
304 | ||
305 | if (self == NULL) | |
306 | return NULL; | |
307 | ||
308 | n = self->rb_node; | |
309 | ||
310 | while (n) { | |
311 | struct symbol_name_rb_node *s; | |
312 | int cmp; | |
313 | ||
314 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
315 | cmp = strcmp(name, s->sym.name); | |
316 | ||
317 | if (cmp < 0) | |
318 | n = n->rb_left; | |
319 | else if (cmp > 0) | |
320 | n = n->rb_right; | |
321 | else | |
322 | return &s->sym; | |
323 | } | |
324 | ||
325 | return NULL; | |
326 | } | |
327 | ||
328 | struct symbol *dso__find_symbol(struct dso *self, | |
329 | enum map_type type, u64 addr) | |
fcf1203a | 330 | { |
6a4694a4 | 331 | return symbols__find(&self->symbols[type], addr); |
fcf1203a ACM |
332 | } |
333 | ||
79406cd7 ACM |
334 | struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type, |
335 | const char *name) | |
336 | { | |
337 | return symbols__find_by_name(&self->symbol_names[type], name); | |
338 | } | |
339 | ||
340 | void dso__sort_by_name(struct dso *self, enum map_type type) | |
341 | { | |
342 | dso__set_sorted_by_name(self, type); | |
343 | return symbols__sort_by_name(&self->symbol_names[type], | |
344 | &self->symbols[type]); | |
345 | } | |
346 | ||
ef12a141 | 347 | int build_id__sprintf(const u8 *self, int len, char *bf) |
a2928c42 | 348 | { |
8d06367f | 349 | char *bid = bf; |
ef12a141 | 350 | const u8 *raw = self; |
8d06367f | 351 | int i; |
a2928c42 | 352 | |
8d06367f ACM |
353 | for (i = 0; i < len; ++i) { |
354 | sprintf(bid, "%02x", *raw); | |
355 | ++raw; | |
356 | bid += 2; | |
357 | } | |
358 | ||
359 | return raw - self; | |
360 | } | |
361 | ||
9e03eb2d | 362 | size_t dso__fprintf_buildid(struct dso *self, FILE *fp) |
8d06367f ACM |
363 | { |
364 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f ACM |
365 | |
366 | build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id); | |
9e03eb2d ACM |
367 | return fprintf(fp, "%s", sbuild_id); |
368 | } | |
369 | ||
95011c60 | 370 | size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp) |
9e03eb2d ACM |
371 | { |
372 | struct rb_node *nd; | |
373 | size_t ret = fprintf(fp, "dso: %s (", self->short_name); | |
374 | ||
375 | ret += dso__fprintf_buildid(self, fp); | |
6a4694a4 | 376 | ret += fprintf(fp, ")\n"); |
95011c60 ACM |
377 | for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) { |
378 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
379 | ret += symbol__fprintf(pos, fp); | |
a2928c42 ACM |
380 | } |
381 | ||
382 | return ret; | |
383 | } | |
384 | ||
9e201442 ACM |
385 | int kallsyms__parse(const char *filename, void *arg, |
386 | int (*process_symbol)(void *arg, const char *name, | |
682b335a | 387 | char type, u64 start)) |
a2928c42 | 388 | { |
a2928c42 ACM |
389 | char *line = NULL; |
390 | size_t n; | |
682b335a | 391 | int err = 0; |
9e201442 | 392 | FILE *file = fopen(filename, "r"); |
a2928c42 ACM |
393 | |
394 | if (file == NULL) | |
395 | goto out_failure; | |
396 | ||
397 | while (!feof(file)) { | |
9cffa8d5 | 398 | u64 start; |
a2928c42 ACM |
399 | int line_len, len; |
400 | char symbol_type; | |
2e538c4a | 401 | char *symbol_name; |
a2928c42 ACM |
402 | |
403 | line_len = getline(&line, &n, file); | |
404 | if (line_len < 0) | |
405 | break; | |
406 | ||
407 | if (!line) | |
408 | goto out_failure; | |
409 | ||
410 | line[--line_len] = '\0'; /* \n */ | |
411 | ||
a0055ae2 | 412 | len = hex2u64(line, &start); |
a2928c42 ACM |
413 | |
414 | len++; | |
415 | if (len + 2 >= line_len) | |
416 | continue; | |
417 | ||
418 | symbol_type = toupper(line[len]); | |
af427bf5 | 419 | symbol_name = line + len + 2; |
682b335a ACM |
420 | |
421 | err = process_symbol(arg, symbol_name, symbol_type, start); | |
422 | if (err) | |
423 | break; | |
2e538c4a ACM |
424 | } |
425 | ||
426 | free(line); | |
427 | fclose(file); | |
682b335a | 428 | return err; |
2e538c4a | 429 | |
2e538c4a ACM |
430 | out_failure: |
431 | return -1; | |
432 | } | |
433 | ||
682b335a ACM |
434 | struct process_kallsyms_args { |
435 | struct map *map; | |
436 | struct dso *dso; | |
437 | }; | |
438 | ||
439 | static int map__process_kallsym_symbol(void *arg, const char *name, | |
440 | char type, u64 start) | |
441 | { | |
442 | struct symbol *sym; | |
443 | struct process_kallsyms_args *a = arg; | |
444 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
445 | ||
446 | if (!symbol_type__is_a(type, a->map->type)) | |
447 | return 0; | |
448 | ||
449 | /* | |
450 | * Will fix up the end later, when we have all symbols sorted. | |
451 | */ | |
452 | sym = symbol__new(start, 0, name); | |
453 | ||
454 | if (sym == NULL) | |
455 | return -ENOMEM; | |
456 | /* | |
457 | * We will pass the symbols to the filter later, in | |
458 | * map__split_kallsyms, when we have split the maps per module | |
459 | */ | |
460 | symbols__insert(root, sym); | |
461 | return 0; | |
462 | } | |
463 | ||
464 | /* | |
465 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
466 | * so that we can in the next step set the symbol ->end address and then | |
467 | * call kernel_maps__split_kallsyms. | |
468 | */ | |
9e201442 ACM |
469 | static int dso__load_all_kallsyms(struct dso *self, const char *filename, |
470 | struct map *map) | |
682b335a ACM |
471 | { |
472 | struct process_kallsyms_args args = { .map = map, .dso = self, }; | |
9e201442 | 473 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
474 | } |
475 | ||
2e538c4a ACM |
476 | /* |
477 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
478 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
479 | * the original ELF section names vmlinux have. | |
480 | */ | |
9958e1f0 | 481 | static int dso__split_kallsyms(struct dso *self, struct map *map, |
9de89fe7 | 482 | symbol_filter_t filter) |
2e538c4a | 483 | { |
9de89fe7 | 484 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
4e06255f | 485 | struct map *curr_map = map; |
2e538c4a ACM |
486 | struct symbol *pos; |
487 | int count = 0; | |
4e06255f ACM |
488 | struct rb_root *root = &self->symbols[map->type]; |
489 | struct rb_node *next = rb_first(root); | |
2e538c4a ACM |
490 | int kernel_range = 0; |
491 | ||
492 | while (next) { | |
493 | char *module; | |
494 | ||
495 | pos = rb_entry(next, struct symbol, rb_node); | |
496 | next = rb_next(&pos->rb_node); | |
497 | ||
498 | module = strchr(pos->name, '\t'); | |
499 | if (module) { | |
75be6cf4 | 500 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
501 | goto discard_symbol; |
502 | ||
2e538c4a ACM |
503 | *module++ = '\0'; |
504 | ||
b7cece76 | 505 | if (strcmp(curr_map->dso->short_name, module)) { |
9de89fe7 | 506 | curr_map = map_groups__find_by_name(kmaps, map->type, module); |
4e06255f | 507 | if (curr_map == NULL) { |
95011c60 | 508 | pr_debug("/proc/{kallsyms,modules} " |
b7cece76 ACM |
509 | "inconsistency while looking " |
510 | "for \"%s\" module!\n", module); | |
af427bf5 ACM |
511 | return -1; |
512 | } | |
b7cece76 ACM |
513 | |
514 | if (curr_map->dso->loaded) | |
515 | goto discard_symbol; | |
af427bf5 | 516 | } |
2e538c4a ACM |
517 | /* |
518 | * So that we look just like we get from .ko files, | |
519 | * i.e. not prelinked, relative to map->start. | |
520 | */ | |
4e06255f ACM |
521 | pos->start = curr_map->map_ip(curr_map, pos->start); |
522 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
523 | } else if (curr_map != map) { | |
2e538c4a ACM |
524 | char dso_name[PATH_MAX]; |
525 | struct dso *dso; | |
526 | ||
527 | snprintf(dso_name, sizeof(dso_name), "[kernel].%d", | |
528 | kernel_range++); | |
529 | ||
00a192b3 | 530 | dso = dso__new(dso_name); |
2e538c4a ACM |
531 | if (dso == NULL) |
532 | return -1; | |
533 | ||
4e06255f | 534 | curr_map = map__new2(pos->start, dso, map->type); |
2e538c4a ACM |
535 | if (map == NULL) { |
536 | dso__delete(dso); | |
537 | return -1; | |
538 | } | |
a2928c42 | 539 | |
4e06255f | 540 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 541 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
542 | ++kernel_range; |
543 | } | |
a2928c42 | 544 | |
4e06255f | 545 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 546 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 547 | symbol__delete(pos); |
2e538c4a | 548 | } else { |
4e06255f ACM |
549 | if (curr_map != map) { |
550 | rb_erase(&pos->rb_node, root); | |
551 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
2e538c4a | 552 | } |
9974f496 MG |
553 | count++; |
554 | } | |
a2928c42 ACM |
555 | } |
556 | ||
9974f496 | 557 | return count; |
2e538c4a | 558 | } |
a2928c42 | 559 | |
9de89fe7 ACM |
560 | int dso__load_kallsyms(struct dso *self, const char *filename, |
561 | struct map *map, symbol_filter_t filter) | |
2e538c4a | 562 | { |
9e201442 | 563 | if (dso__load_all_kallsyms(self, filename, map) < 0) |
2e538c4a ACM |
564 | return -1; |
565 | ||
4e06255f ACM |
566 | symbols__fixup_end(&self->symbols[map->type]); |
567 | self->origin = DSO__ORIG_KERNEL; | |
2e538c4a | 568 | |
9de89fe7 | 569 | return dso__split_kallsyms(self, map, filter); |
af427bf5 ACM |
570 | } |
571 | ||
439d473b | 572 | static int dso__load_perf_map(struct dso *self, struct map *map, |
6beba7ad | 573 | symbol_filter_t filter) |
80d496be PE |
574 | { |
575 | char *line = NULL; | |
576 | size_t n; | |
577 | FILE *file; | |
578 | int nr_syms = 0; | |
579 | ||
439d473b | 580 | file = fopen(self->long_name, "r"); |
80d496be PE |
581 | if (file == NULL) |
582 | goto out_failure; | |
583 | ||
584 | while (!feof(file)) { | |
9cffa8d5 | 585 | u64 start, size; |
80d496be PE |
586 | struct symbol *sym; |
587 | int line_len, len; | |
588 | ||
589 | line_len = getline(&line, &n, file); | |
590 | if (line_len < 0) | |
591 | break; | |
592 | ||
593 | if (!line) | |
594 | goto out_failure; | |
595 | ||
596 | line[--line_len] = '\0'; /* \n */ | |
597 | ||
598 | len = hex2u64(line, &start); | |
599 | ||
600 | len++; | |
601 | if (len + 2 >= line_len) | |
602 | continue; | |
603 | ||
604 | len += hex2u64(line + len, &size); | |
605 | ||
606 | len++; | |
607 | if (len + 2 >= line_len) | |
608 | continue; | |
609 | ||
00a192b3 | 610 | sym = symbol__new(start, size, line + len); |
80d496be PE |
611 | |
612 | if (sym == NULL) | |
613 | goto out_delete_line; | |
614 | ||
439d473b | 615 | if (filter && filter(map, sym)) |
00a192b3 | 616 | symbol__delete(sym); |
80d496be | 617 | else { |
6a4694a4 | 618 | symbols__insert(&self->symbols[map->type], sym); |
80d496be PE |
619 | nr_syms++; |
620 | } | |
621 | } | |
622 | ||
623 | free(line); | |
624 | fclose(file); | |
625 | ||
626 | return nr_syms; | |
627 | ||
628 | out_delete_line: | |
629 | free(line); | |
630 | out_failure: | |
631 | return -1; | |
632 | } | |
633 | ||
a2928c42 ACM |
634 | /** |
635 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
636 | * | |
637 | * @self: struct elf_symtab instance to iterate | |
83a0944f | 638 | * @idx: uint32_t idx |
a2928c42 ACM |
639 | * @sym: GElf_Sym iterator |
640 | */ | |
83a0944f IM |
641 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
642 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
643 | idx < nr_syms; \ | |
644 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
645 | |
646 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
647 | { | |
648 | return GELF_ST_TYPE(sym->st_info); | |
649 | } | |
650 | ||
651 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
652 | { | |
653 | return elf_sym__type(sym) == STT_FUNC && | |
654 | sym->st_name != 0 && | |
81833130 | 655 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
656 | } |
657 | ||
f1dfa0b1 ACM |
658 | static inline bool elf_sym__is_object(const GElf_Sym *sym) |
659 | { | |
660 | return elf_sym__type(sym) == STT_OBJECT && | |
661 | sym->st_name != 0 && | |
662 | sym->st_shndx != SHN_UNDEF; | |
663 | } | |
664 | ||
6cfcc53e MG |
665 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
666 | { | |
667 | return elf_sym__type(sym) == STT_NOTYPE && | |
668 | sym->st_name != 0 && | |
669 | sym->st_shndx != SHN_UNDEF && | |
670 | sym->st_shndx != SHN_ABS; | |
671 | } | |
672 | ||
673 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
674 | const Elf_Data *secstrs) | |
675 | { | |
676 | return secstrs->d_buf + shdr->sh_name; | |
677 | } | |
678 | ||
679 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
680 | const Elf_Data *secstrs) | |
681 | { | |
682 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
683 | } | |
684 | ||
f1dfa0b1 ACM |
685 | static inline bool elf_sec__is_data(const GElf_Shdr *shdr, |
686 | const Elf_Data *secstrs) | |
687 | { | |
688 | return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; | |
689 | } | |
690 | ||
a2928c42 ACM |
691 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
692 | const Elf_Data *symstrs) | |
693 | { | |
694 | return symstrs->d_buf + sym->st_name; | |
695 | } | |
696 | ||
697 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
698 | GElf_Shdr *shp, const char *name, | |
83a0944f | 699 | size_t *idx) |
a2928c42 ACM |
700 | { |
701 | Elf_Scn *sec = NULL; | |
702 | size_t cnt = 1; | |
703 | ||
704 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
705 | char *str; | |
706 | ||
707 | gelf_getshdr(sec, shp); | |
708 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
709 | if (!strcmp(name, str)) { | |
83a0944f IM |
710 | if (idx) |
711 | *idx = cnt; | |
a2928c42 ACM |
712 | break; |
713 | } | |
714 | ++cnt; | |
715 | } | |
716 | ||
717 | return sec; | |
718 | } | |
719 | ||
8ce998d6 ACM |
720 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
721 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
722 | idx < nr_entries; \ | |
723 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
724 | ||
725 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
726 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
727 | idx < nr_entries; \ | |
728 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
729 | ||
a25e46c4 ACM |
730 | /* |
731 | * We need to check if we have a .dynsym, so that we can handle the | |
732 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
733 | * .dynsym or .symtab). | |
734 | * And always look at the original dso, not at debuginfo packages, that | |
735 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
736 | */ | |
82164161 ACM |
737 | static int dso__synthesize_plt_symbols(struct dso *self, struct map *map, |
738 | symbol_filter_t filter) | |
8ce998d6 ACM |
739 | { |
740 | uint32_t nr_rel_entries, idx; | |
741 | GElf_Sym sym; | |
9cffa8d5 | 742 | u64 plt_offset; |
8ce998d6 ACM |
743 | GElf_Shdr shdr_plt; |
744 | struct symbol *f; | |
a25e46c4 | 745 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 746 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
747 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
748 | size_t dynsym_idx; | |
749 | GElf_Ehdr ehdr; | |
8ce998d6 | 750 | char sympltname[1024]; |
a25e46c4 ACM |
751 | Elf *elf; |
752 | int nr = 0, symidx, fd, err = 0; | |
753 | ||
439d473b | 754 | fd = open(self->long_name, O_RDONLY); |
a25e46c4 ACM |
755 | if (fd < 0) |
756 | goto out; | |
757 | ||
84087126 | 758 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
759 | if (elf == NULL) |
760 | goto out_close; | |
761 | ||
762 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
763 | goto out_elf_end; | |
764 | ||
765 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
766 | ".dynsym", &dynsym_idx); | |
767 | if (scn_dynsym == NULL) | |
768 | goto out_elf_end; | |
8ce998d6 | 769 | |
a25e46c4 | 770 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
771 | ".rela.plt", NULL); |
772 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 773 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
774 | ".rel.plt", NULL); |
775 | if (scn_plt_rel == NULL) | |
a25e46c4 | 776 | goto out_elf_end; |
8ce998d6 ACM |
777 | } |
778 | ||
a25e46c4 ACM |
779 | err = -1; |
780 | ||
8ce998d6 | 781 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 782 | goto out_elf_end; |
8ce998d6 | 783 | |
a25e46c4 ACM |
784 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
785 | goto out_elf_end; | |
8ce998d6 ACM |
786 | |
787 | /* | |
83a0944f | 788 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
789 | * and the symbols in the .dynsym they refer to. |
790 | */ | |
791 | reldata = elf_getdata(scn_plt_rel, NULL); | |
792 | if (reldata == NULL) | |
a25e46c4 | 793 | goto out_elf_end; |
8ce998d6 ACM |
794 | |
795 | syms = elf_getdata(scn_dynsym, NULL); | |
796 | if (syms == NULL) | |
a25e46c4 | 797 | goto out_elf_end; |
8ce998d6 | 798 | |
a25e46c4 | 799 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 800 | if (scn_symstrs == NULL) |
a25e46c4 | 801 | goto out_elf_end; |
8ce998d6 ACM |
802 | |
803 | symstrs = elf_getdata(scn_symstrs, NULL); | |
804 | if (symstrs == NULL) | |
a25e46c4 | 805 | goto out_elf_end; |
8ce998d6 ACM |
806 | |
807 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
808 | plt_offset = shdr_plt.sh_offset; | |
809 | ||
810 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
811 | GElf_Rela pos_mem, *pos; | |
812 | ||
813 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
814 | nr_rel_entries) { | |
815 | symidx = GELF_R_SYM(pos->r_info); | |
816 | plt_offset += shdr_plt.sh_entsize; | |
817 | gelf_getsym(syms, symidx, &sym); | |
818 | snprintf(sympltname, sizeof(sympltname), | |
819 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
820 | ||
821 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 822 | sympltname); |
8ce998d6 | 823 | if (!f) |
a25e46c4 | 824 | goto out_elf_end; |
8ce998d6 | 825 | |
82164161 ACM |
826 | if (filter && filter(map, f)) |
827 | symbol__delete(f); | |
828 | else { | |
6a4694a4 | 829 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
830 | ++nr; |
831 | } | |
8ce998d6 ACM |
832 | } |
833 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
834 | GElf_Rel pos_mem, *pos; | |
835 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
836 | nr_rel_entries) { | |
837 | symidx = GELF_R_SYM(pos->r_info); | |
838 | plt_offset += shdr_plt.sh_entsize; | |
839 | gelf_getsym(syms, symidx, &sym); | |
840 | snprintf(sympltname, sizeof(sympltname), | |
841 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
842 | ||
843 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 844 | sympltname); |
8ce998d6 | 845 | if (!f) |
a25e46c4 | 846 | goto out_elf_end; |
8ce998d6 | 847 | |
82164161 ACM |
848 | if (filter && filter(map, f)) |
849 | symbol__delete(f); | |
850 | else { | |
6a4694a4 | 851 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
852 | ++nr; |
853 | } | |
8ce998d6 | 854 | } |
8ce998d6 ACM |
855 | } |
856 | ||
a25e46c4 ACM |
857 | err = 0; |
858 | out_elf_end: | |
859 | elf_end(elf); | |
860 | out_close: | |
861 | close(fd); | |
862 | ||
863 | if (err == 0) | |
864 | return nr; | |
865 | out: | |
6beba7ad ACM |
866 | pr_warning("%s: problems reading %s PLT info.\n", |
867 | __func__, self->long_name); | |
a25e46c4 | 868 | return 0; |
8ce998d6 ACM |
869 | } |
870 | ||
d45868d3 ACM |
871 | static bool elf_sym__is_a(GElf_Sym *self, enum map_type type) |
872 | { | |
873 | switch (type) { | |
874 | case MAP__FUNCTION: | |
875 | return elf_sym__is_function(self); | |
f1dfa0b1 ACM |
876 | case MAP__VARIABLE: |
877 | return elf_sym__is_object(self); | |
d45868d3 ACM |
878 | default: |
879 | return false; | |
880 | } | |
881 | } | |
882 | ||
883 | static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type) | |
884 | { | |
885 | switch (type) { | |
886 | case MAP__FUNCTION: | |
887 | return elf_sec__is_text(self, secstrs); | |
f1dfa0b1 ACM |
888 | case MAP__VARIABLE: |
889 | return elf_sec__is_data(self, secstrs); | |
d45868d3 ACM |
890 | default: |
891 | return false; | |
892 | } | |
893 | } | |
894 | ||
9de89fe7 ACM |
895 | static int dso__load_sym(struct dso *self, struct map *map, const char *name, |
896 | int fd, symbol_filter_t filter, int kmodule) | |
a2928c42 | 897 | { |
9de89fe7 | 898 | struct kmap *kmap = self->kernel ? map__kmap(map) : NULL; |
2e538c4a ACM |
899 | struct map *curr_map = map; |
900 | struct dso *curr_dso = self; | |
901 | size_t dso_name_len = strlen(self->short_name); | |
6cfcc53e | 902 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
903 | uint32_t nr_syms; |
904 | int err = -1; | |
83a0944f | 905 | uint32_t idx; |
a2928c42 ACM |
906 | GElf_Ehdr ehdr; |
907 | GElf_Shdr shdr; | |
908 | Elf_Data *syms; | |
909 | GElf_Sym sym; | |
a25e46c4 | 910 | Elf_Scn *sec, *sec_strndx; |
a2928c42 | 911 | Elf *elf; |
439d473b | 912 | int nr = 0; |
a2928c42 | 913 | |
84087126 | 914 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 915 | if (elf == NULL) { |
6beba7ad | 916 | pr_err("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
917 | goto out_close; |
918 | } | |
919 | ||
920 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
6beba7ad | 921 | pr_err("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
922 | goto out_elf_end; |
923 | } | |
924 | ||
925 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); | |
8ce998d6 | 926 | if (sec == NULL) { |
a25e46c4 ACM |
927 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
928 | if (sec == NULL) | |
8ce998d6 | 929 | goto out_elf_end; |
8ce998d6 | 930 | } |
a2928c42 ACM |
931 | |
932 | syms = elf_getdata(sec, NULL); | |
933 | if (syms == NULL) | |
934 | goto out_elf_end; | |
935 | ||
936 | sec = elf_getscn(elf, shdr.sh_link); | |
937 | if (sec == NULL) | |
938 | goto out_elf_end; | |
939 | ||
940 | symstrs = elf_getdata(sec, NULL); | |
941 | if (symstrs == NULL) | |
942 | goto out_elf_end; | |
943 | ||
6cfcc53e MG |
944 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
945 | if (sec_strndx == NULL) | |
946 | goto out_elf_end; | |
947 | ||
948 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 949 | if (secstrs == NULL) |
6cfcc53e MG |
950 | goto out_elf_end; |
951 | ||
a2928c42 ACM |
952 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
953 | ||
e9fbc9dc | 954 | memset(&sym, 0, sizeof(sym)); |
9de89fe7 | 955 | if (!self->kernel) { |
d20ff6bd | 956 | self->adjust_symbols = (ehdr.e_type == ET_EXEC || |
30d7a77d ACM |
957 | elf_section_by_name(elf, &ehdr, &shdr, |
958 | ".gnu.prelink_undo", | |
959 | NULL) != NULL); | |
d20ff6bd MG |
960 | } else self->adjust_symbols = 0; |
961 | ||
83a0944f | 962 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 963 | struct symbol *f; |
56b03f3c | 964 | const char *elf_name = elf_sym__name(&sym, symstrs); |
2e538c4a | 965 | char *demangled = NULL; |
6cfcc53e MG |
966 | int is_label = elf_sym__is_label(&sym); |
967 | const char *section_name; | |
a2928c42 | 968 | |
9de89fe7 ACM |
969 | if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name && |
970 | strcmp(elf_name, kmap->ref_reloc_sym->name) == 0) | |
971 | kmap->ref_reloc_sym->unrelocated_addr = sym.st_value; | |
56b03f3c | 972 | |
d45868d3 | 973 | if (!is_label && !elf_sym__is_a(&sym, map->type)) |
a2928c42 ACM |
974 | continue; |
975 | ||
976 | sec = elf_getscn(elf, sym.st_shndx); | |
977 | if (!sec) | |
978 | goto out_elf_end; | |
979 | ||
980 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 981 | |
d45868d3 | 982 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
983 | continue; |
984 | ||
985 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 986 | |
9de89fe7 | 987 | if (self->kernel || kmodule) { |
2e538c4a ACM |
988 | char dso_name[PATH_MAX]; |
989 | ||
990 | if (strcmp(section_name, | |
991 | curr_dso->short_name + dso_name_len) == 0) | |
992 | goto new_symbol; | |
993 | ||
994 | if (strcmp(section_name, ".text") == 0) { | |
995 | curr_map = map; | |
996 | curr_dso = self; | |
997 | goto new_symbol; | |
998 | } | |
999 | ||
1000 | snprintf(dso_name, sizeof(dso_name), | |
1001 | "%s%s", self->short_name, section_name); | |
1002 | ||
9de89fe7 | 1003 | curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name); |
2e538c4a ACM |
1004 | if (curr_map == NULL) { |
1005 | u64 start = sym.st_value; | |
1006 | ||
1007 | if (kmodule) | |
1008 | start += map->start + shdr.sh_offset; | |
1009 | ||
00a192b3 | 1010 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
1011 | if (curr_dso == NULL) |
1012 | goto out_elf_end; | |
3610583c ACM |
1013 | curr_map = map__new2(start, curr_dso, |
1014 | MAP__FUNCTION); | |
2e538c4a ACM |
1015 | if (curr_map == NULL) { |
1016 | dso__delete(curr_dso); | |
1017 | goto out_elf_end; | |
1018 | } | |
ed52ce2e ACM |
1019 | curr_map->map_ip = identity__map_ip; |
1020 | curr_map->unmap_ip = identity__map_ip; | |
2e538c4a | 1021 | curr_dso->origin = DSO__ORIG_KERNEL; |
9de89fe7 | 1022 | map_groups__insert(kmap->kmaps, curr_map); |
b0da954a | 1023 | dsos__add(&dsos__kernel, curr_dso); |
2e538c4a ACM |
1024 | } else |
1025 | curr_dso = curr_map->dso; | |
1026 | ||
1027 | goto new_symbol; | |
af427bf5 ACM |
1028 | } |
1029 | ||
2e538c4a | 1030 | if (curr_dso->adjust_symbols) { |
6beba7ad ACM |
1031 | pr_debug2("adjusting symbol: st_value: %Lx sh_addr: " |
1032 | "%Lx sh_offset: %Lx\n", (u64)sym.st_value, | |
1033 | (u64)shdr.sh_addr, (u64)shdr.sh_offset); | |
f5812a7a | 1034 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1035 | } |
28ac909b ACM |
1036 | /* |
1037 | * We need to figure out if the object was created from C++ sources | |
1038 | * DWARF DW_compile_unit has this, but we don't always have access | |
1039 | * to it... | |
1040 | */ | |
83a0944f | 1041 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1042 | if (demangled != NULL) |
83a0944f | 1043 | elf_name = demangled; |
2e538c4a | 1044 | new_symbol: |
00a192b3 | 1045 | f = symbol__new(sym.st_value, sym.st_size, elf_name); |
28ac909b | 1046 | free(demangled); |
a2928c42 ACM |
1047 | if (!f) |
1048 | goto out_elf_end; | |
1049 | ||
2e538c4a | 1050 | if (filter && filter(curr_map, f)) |
00a192b3 | 1051 | symbol__delete(f); |
69ee69f6 | 1052 | else { |
6a4694a4 | 1053 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1054 | nr++; |
1055 | } | |
a2928c42 ACM |
1056 | } |
1057 | ||
2e538c4a ACM |
1058 | /* |
1059 | * For misannotated, zeroed, ASM function sizes. | |
1060 | */ | |
1061 | if (nr > 0) | |
6a4694a4 | 1062 | symbols__fixup_end(&self->symbols[map->type]); |
a2928c42 ACM |
1063 | err = nr; |
1064 | out_elf_end: | |
1065 | elf_end(elf); | |
1066 | out_close: | |
1067 | return err; | |
1068 | } | |
1069 | ||
78075caa ACM |
1070 | static bool dso__build_id_equal(const struct dso *self, u8 *build_id) |
1071 | { | |
1072 | return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0; | |
1073 | } | |
1074 | ||
b0da954a | 1075 | static bool __dsos__read_build_ids(struct list_head *head) |
57f395a7 | 1076 | { |
e30a3d12 | 1077 | bool have_build_id = false; |
57f395a7 FW |
1078 | struct dso *pos; |
1079 | ||
b0da954a | 1080 | list_for_each_entry(pos, head, node) |
e30a3d12 ACM |
1081 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1082 | sizeof(pos->build_id)) > 0) { | |
1083 | have_build_id = true; | |
1084 | pos->has_build_id = true; | |
1085 | } | |
57f395a7 | 1086 | |
e30a3d12 | 1087 | return have_build_id; |
57f395a7 FW |
1088 | } |
1089 | ||
b0da954a ACM |
1090 | bool dsos__read_build_ids(void) |
1091 | { | |
8b4825bf ACM |
1092 | bool kbuildids = __dsos__read_build_ids(&dsos__kernel), |
1093 | ubuildids = __dsos__read_build_ids(&dsos__user); | |
1094 | return kbuildids || ubuildids; | |
b0da954a ACM |
1095 | } |
1096 | ||
fd7a346e ACM |
1097 | /* |
1098 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1099 | */ | |
1100 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1101 | ||
2643ce11 | 1102 | int filename__read_build_id(const char *filename, void *bf, size_t size) |
4d1e00a8 | 1103 | { |
2643ce11 | 1104 | int fd, err = -1; |
4d1e00a8 ACM |
1105 | GElf_Ehdr ehdr; |
1106 | GElf_Shdr shdr; | |
fd7a346e | 1107 | Elf_Data *data; |
4d1e00a8 | 1108 | Elf_Scn *sec; |
e57cfcda | 1109 | Elf_Kind ek; |
fd7a346e | 1110 | void *ptr; |
4d1e00a8 | 1111 | Elf *elf; |
4d1e00a8 | 1112 | |
2643ce11 ACM |
1113 | if (size < BUILD_ID_SIZE) |
1114 | goto out; | |
1115 | ||
1116 | fd = open(filename, O_RDONLY); | |
4d1e00a8 ACM |
1117 | if (fd < 0) |
1118 | goto out; | |
1119 | ||
84087126 | 1120 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
4d1e00a8 | 1121 | if (elf == NULL) { |
8d06367f | 1122 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); |
4d1e00a8 ACM |
1123 | goto out_close; |
1124 | } | |
1125 | ||
e57cfcda PE |
1126 | ek = elf_kind(elf); |
1127 | if (ek != ELF_K_ELF) | |
1128 | goto out_elf_end; | |
1129 | ||
4d1e00a8 | 1130 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1131 | pr_err("%s: cannot get elf header.\n", __func__); |
4d1e00a8 ACM |
1132 | goto out_elf_end; |
1133 | } | |
1134 | ||
2643ce11 ACM |
1135 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1136 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
1137 | if (sec == NULL) { |
1138 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1139 | ".notes", NULL); | |
1140 | if (sec == NULL) | |
1141 | goto out_elf_end; | |
1142 | } | |
4d1e00a8 | 1143 | |
fd7a346e ACM |
1144 | data = elf_getdata(sec, NULL); |
1145 | if (data == NULL) | |
4d1e00a8 | 1146 | goto out_elf_end; |
fd7a346e ACM |
1147 | |
1148 | ptr = data->d_buf; | |
1149 | while (ptr < (data->d_buf + data->d_size)) { | |
1150 | GElf_Nhdr *nhdr = ptr; | |
1151 | int namesz = NOTE_ALIGN(nhdr->n_namesz), | |
1152 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
1153 | const char *name; | |
1154 | ||
1155 | ptr += sizeof(*nhdr); | |
1156 | name = ptr; | |
1157 | ptr += namesz; | |
1158 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1159 | nhdr->n_namesz == sizeof("GNU")) { | |
1160 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
1161 | memcpy(bf, ptr, BUILD_ID_SIZE); | |
1162 | err = BUILD_ID_SIZE; | |
1163 | break; | |
1164 | } | |
1165 | } | |
1166 | ptr += descsz; | |
1167 | } | |
2643ce11 ACM |
1168 | out_elf_end: |
1169 | elf_end(elf); | |
1170 | out_close: | |
1171 | close(fd); | |
1172 | out: | |
1173 | return err; | |
1174 | } | |
1175 | ||
f1617b40 ACM |
1176 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1177 | { | |
1178 | int fd, err = -1; | |
1179 | ||
1180 | if (size < BUILD_ID_SIZE) | |
1181 | goto out; | |
1182 | ||
1183 | fd = open(filename, O_RDONLY); | |
1184 | if (fd < 0) | |
1185 | goto out; | |
1186 | ||
1187 | while (1) { | |
1188 | char bf[BUFSIZ]; | |
1189 | GElf_Nhdr nhdr; | |
1190 | int namesz, descsz; | |
1191 | ||
1192 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1193 | break; | |
1194 | ||
fd7a346e ACM |
1195 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1196 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1197 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1198 | nhdr.n_namesz == sizeof("GNU")) { | |
1199 | if (read(fd, bf, namesz) != namesz) | |
1200 | break; | |
1201 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
1202 | if (read(fd, build_id, | |
1203 | BUILD_ID_SIZE) == BUILD_ID_SIZE) { | |
1204 | err = 0; | |
1205 | break; | |
1206 | } | |
1207 | } else if (read(fd, bf, descsz) != descsz) | |
1208 | break; | |
1209 | } else { | |
1210 | int n = namesz + descsz; | |
1211 | if (read(fd, bf, n) != n) | |
1212 | break; | |
1213 | } | |
1214 | } | |
1215 | close(fd); | |
1216 | out: | |
1217 | return err; | |
1218 | } | |
1219 | ||
94cb9e38 ACM |
1220 | char dso__symtab_origin(const struct dso *self) |
1221 | { | |
1222 | static const char origin[] = { | |
1223 | [DSO__ORIG_KERNEL] = 'k', | |
1224 | [DSO__ORIG_JAVA_JIT] = 'j', | |
4cf40131 | 1225 | [DSO__ORIG_BUILD_ID_CACHE] = 'B', |
94cb9e38 ACM |
1226 | [DSO__ORIG_FEDORA] = 'f', |
1227 | [DSO__ORIG_UBUNTU] = 'u', | |
1228 | [DSO__ORIG_BUILDID] = 'b', | |
1229 | [DSO__ORIG_DSO] = 'd', | |
439d473b | 1230 | [DSO__ORIG_KMODULE] = 'K', |
94cb9e38 ACM |
1231 | }; |
1232 | ||
1233 | if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND) | |
1234 | return '!'; | |
1235 | return origin[self->origin]; | |
1236 | } | |
1237 | ||
9de89fe7 | 1238 | int dso__load(struct dso *self, struct map *map, symbol_filter_t filter) |
a2928c42 | 1239 | { |
4d1e00a8 | 1240 | int size = PATH_MAX; |
c338aee8 | 1241 | char *name; |
d3379ab9 | 1242 | u8 build_id[BUILD_ID_SIZE]; |
4cf40131 | 1243 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; |
a2928c42 ACM |
1244 | int ret = -1; |
1245 | int fd; | |
1246 | ||
3610583c | 1247 | dso__set_loaded(self, map->type); |
66bd8424 | 1248 | |
c338aee8 | 1249 | if (self->kernel) |
9de89fe7 | 1250 | return dso__load_kernel_sym(self, map, filter); |
c338aee8 ACM |
1251 | |
1252 | name = malloc(size); | |
a2928c42 ACM |
1253 | if (!name) |
1254 | return -1; | |
1255 | ||
30d7a77d | 1256 | self->adjust_symbols = 0; |
f5812a7a | 1257 | |
94cb9e38 | 1258 | if (strncmp(self->name, "/tmp/perf-", 10) == 0) { |
6beba7ad | 1259 | ret = dso__load_perf_map(self, map, filter); |
94cb9e38 ACM |
1260 | self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : |
1261 | DSO__ORIG_NOT_FOUND; | |
1262 | return ret; | |
1263 | } | |
1264 | ||
4cf40131 | 1265 | self->origin = DSO__ORIG_BUILD_ID_CACHE; |
80d496be | 1266 | |
4cf40131 ACM |
1267 | if (self->has_build_id) { |
1268 | build_id__sprintf(self->build_id, sizeof(self->build_id), | |
1269 | build_id_hex); | |
1270 | snprintf(name, size, "%s/%s/.build-id/%.2s/%s", | |
1271 | getenv("HOME"), DEBUG_CACHE_DIR, | |
1272 | build_id_hex, build_id_hex + 2); | |
1273 | goto open_file; | |
1274 | } | |
a2928c42 ACM |
1275 | more: |
1276 | do { | |
94cb9e38 ACM |
1277 | self->origin++; |
1278 | switch (self->origin) { | |
1279 | case DSO__ORIG_FEDORA: | |
439d473b ACM |
1280 | snprintf(name, size, "/usr/lib/debug%s.debug", |
1281 | self->long_name); | |
a2928c42 | 1282 | break; |
94cb9e38 | 1283 | case DSO__ORIG_UBUNTU: |
439d473b ACM |
1284 | snprintf(name, size, "/usr/lib/debug%s", |
1285 | self->long_name); | |
a2928c42 | 1286 | break; |
94cb9e38 | 1287 | case DSO__ORIG_BUILDID: |
d3379ab9 ACM |
1288 | if (filename__read_build_id(self->long_name, build_id, |
1289 | sizeof(build_id))) { | |
d3379ab9 ACM |
1290 | build_id__sprintf(build_id, sizeof(build_id), |
1291 | build_id_hex); | |
4d1e00a8 ACM |
1292 | snprintf(name, size, |
1293 | "/usr/lib/debug/.build-id/%.2s/%s.debug", | |
d3379ab9 ACM |
1294 | build_id_hex, build_id_hex + 2); |
1295 | if (self->has_build_id) | |
1296 | goto compare_build_id; | |
1297 | break; | |
4d1e00a8 | 1298 | } |
94cb9e38 | 1299 | self->origin++; |
4d1e00a8 | 1300 | /* Fall thru */ |
94cb9e38 | 1301 | case DSO__ORIG_DSO: |
439d473b | 1302 | snprintf(name, size, "%s", self->long_name); |
a2928c42 ACM |
1303 | break; |
1304 | ||
1305 | default: | |
1306 | goto out; | |
1307 | } | |
a2928c42 | 1308 | |
8d06367f | 1309 | if (self->has_build_id) { |
d3379ab9 ACM |
1310 | if (filename__read_build_id(name, build_id, |
1311 | sizeof(build_id)) < 0) | |
8d06367f | 1312 | goto more; |
8d06367f | 1313 | compare_build_id: |
78075caa | 1314 | if (!dso__build_id_equal(self, build_id)) |
8d06367f ACM |
1315 | goto more; |
1316 | } | |
4cf40131 | 1317 | open_file: |
a2928c42 ACM |
1318 | fd = open(name, O_RDONLY); |
1319 | } while (fd < 0); | |
1320 | ||
9de89fe7 | 1321 | ret = dso__load_sym(self, map, name, fd, filter, 0); |
a2928c42 ACM |
1322 | close(fd); |
1323 | ||
1324 | /* | |
1325 | * Some people seem to have debuginfo files _WITHOUT_ debug info!?!? | |
1326 | */ | |
1327 | if (!ret) | |
1328 | goto more; | |
1329 | ||
a25e46c4 | 1330 | if (ret > 0) { |
82164161 | 1331 | int nr_plt = dso__synthesize_plt_symbols(self, map, filter); |
a25e46c4 ACM |
1332 | if (nr_plt > 0) |
1333 | ret += nr_plt; | |
1334 | } | |
a2928c42 ACM |
1335 | out: |
1336 | free(name); | |
1340e6bb ACM |
1337 | if (ret < 0 && strstr(self->name, " (deleted)") != NULL) |
1338 | return 0; | |
a2928c42 ACM |
1339 | return ret; |
1340 | } | |
1341 | ||
79406cd7 ACM |
1342 | struct map *map_groups__find_by_name(struct map_groups *self, |
1343 | enum map_type type, const char *name) | |
439d473b ACM |
1344 | { |
1345 | struct rb_node *nd; | |
1346 | ||
79406cd7 | 1347 | for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1348 | struct map *map = rb_entry(nd, struct map, rb_node); |
1349 | ||
b7cece76 | 1350 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1351 | return map; |
1352 | } | |
1353 | ||
1354 | return NULL; | |
1355 | } | |
1356 | ||
b7cece76 ACM |
1357 | static int dso__kernel_module_get_build_id(struct dso *self) |
1358 | { | |
1359 | char filename[PATH_MAX]; | |
1360 | /* | |
1361 | * kernel module short names are of the form "[module]" and | |
1362 | * we need just "module" here. | |
1363 | */ | |
1364 | const char *name = self->short_name + 1; | |
1365 | ||
1366 | snprintf(filename, sizeof(filename), | |
1367 | "/sys/module/%.*s/notes/.note.gnu.build-id", | |
1368 | (int)strlen(name - 1), name); | |
1369 | ||
1370 | if (sysfs__read_build_id(filename, self->build_id, | |
1371 | sizeof(self->build_id)) == 0) | |
1372 | self->has_build_id = true; | |
1373 | ||
1374 | return 0; | |
1375 | } | |
1376 | ||
9de89fe7 | 1377 | static int map_groups__set_modules_path_dir(struct map_groups *self, char *dirname) |
6cfcc53e | 1378 | { |
439d473b | 1379 | struct dirent *dent; |
439d473b | 1380 | DIR *dir = opendir(dirname); |
6cfcc53e | 1381 | |
439d473b | 1382 | if (!dir) { |
87f8ea4c | 1383 | pr_debug("%s: cannot open %s dir\n", __func__, dirname); |
439d473b ACM |
1384 | return -1; |
1385 | } | |
6cfcc53e | 1386 | |
439d473b ACM |
1387 | while ((dent = readdir(dir)) != NULL) { |
1388 | char path[PATH_MAX]; | |
1389 | ||
1390 | if (dent->d_type == DT_DIR) { | |
1391 | if (!strcmp(dent->d_name, ".") || | |
1392 | !strcmp(dent->d_name, "..")) | |
1393 | continue; | |
1394 | ||
1395 | snprintf(path, sizeof(path), "%s/%s", | |
1396 | dirname, dent->d_name); | |
9de89fe7 | 1397 | if (map_groups__set_modules_path_dir(self, path) < 0) |
439d473b ACM |
1398 | goto failure; |
1399 | } else { | |
1400 | char *dot = strrchr(dent->d_name, '.'), | |
1401 | dso_name[PATH_MAX]; | |
1402 | struct map *map; | |
cfc10d3b | 1403 | char *long_name; |
439d473b ACM |
1404 | |
1405 | if (dot == NULL || strcmp(dot, ".ko")) | |
1406 | continue; | |
1407 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1408 | (int)(dot - dent->d_name), dent->d_name); | |
1409 | ||
a2a99e8e | 1410 | strxfrchar(dso_name, '-', '_'); |
9de89fe7 | 1411 | map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name); |
439d473b ACM |
1412 | if (map == NULL) |
1413 | continue; | |
1414 | ||
1415 | snprintf(path, sizeof(path), "%s/%s", | |
1416 | dirname, dent->d_name); | |
1417 | ||
cfc10d3b ACM |
1418 | long_name = strdup(path); |
1419 | if (long_name == NULL) | |
439d473b | 1420 | goto failure; |
cfc10d3b | 1421 | dso__set_long_name(map->dso, long_name); |
b7cece76 | 1422 | dso__kernel_module_get_build_id(map->dso); |
439d473b | 1423 | } |
439d473b | 1424 | } |
6cfcc53e | 1425 | |
c338aee8 | 1426 | return 0; |
439d473b ACM |
1427 | failure: |
1428 | closedir(dir); | |
1429 | return -1; | |
1430 | } | |
6cfcc53e | 1431 | |
9de89fe7 | 1432 | static int map_groups__set_modules_path(struct map_groups *self) |
439d473b ACM |
1433 | { |
1434 | struct utsname uts; | |
1435 | char modules_path[PATH_MAX]; | |
6cfcc53e | 1436 | |
439d473b ACM |
1437 | if (uname(&uts) < 0) |
1438 | return -1; | |
6cfcc53e | 1439 | |
439d473b ACM |
1440 | snprintf(modules_path, sizeof(modules_path), "/lib/modules/%s/kernel", |
1441 | uts.release); | |
6cfcc53e | 1442 | |
9de89fe7 | 1443 | return map_groups__set_modules_path_dir(self, modules_path); |
6cfcc53e MG |
1444 | } |
1445 | ||
439d473b ACM |
1446 | /* |
1447 | * Constructor variant for modules (where we know from /proc/modules where | |
1448 | * they are loaded) and for vmlinux, where only after we load all the | |
1449 | * symbols we'll know where it starts and ends. | |
1450 | */ | |
3610583c | 1451 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1452 | { |
9de89fe7 ACM |
1453 | struct map *self = zalloc(sizeof(*self) + |
1454 | (dso->kernel ? sizeof(struct kmap) : 0)); | |
439d473b | 1455 | if (self != NULL) { |
439d473b | 1456 | /* |
afb7b4f0 | 1457 | * ->end will be filled after we load all the symbols |
439d473b | 1458 | */ |
3610583c | 1459 | map__init(self, type, start, 0, 0, dso); |
439d473b | 1460 | } |
afb7b4f0 | 1461 | |
439d473b ACM |
1462 | return self; |
1463 | } | |
1464 | ||
9de89fe7 ACM |
1465 | struct map *map_groups__new_module(struct map_groups *self, u64 start, |
1466 | const char *filename) | |
b7cece76 ACM |
1467 | { |
1468 | struct map *map; | |
1469 | struct dso *dso = __dsos__findnew(&dsos__kernel, filename); | |
1470 | ||
1471 | if (dso == NULL) | |
1472 | return NULL; | |
1473 | ||
1474 | map = map__new2(start, dso, MAP__FUNCTION); | |
1475 | if (map == NULL) | |
1476 | return NULL; | |
1477 | ||
1478 | dso->origin = DSO__ORIG_KMODULE; | |
9de89fe7 | 1479 | map_groups__insert(self, map); |
b7cece76 ACM |
1480 | return map; |
1481 | } | |
1482 | ||
9de89fe7 | 1483 | static int map_groups__create_modules(struct map_groups *self) |
439d473b ACM |
1484 | { |
1485 | char *line = NULL; | |
1486 | size_t n; | |
1487 | FILE *file = fopen("/proc/modules", "r"); | |
1488 | struct map *map; | |
6cfcc53e | 1489 | |
439d473b ACM |
1490 | if (file == NULL) |
1491 | return -1; | |
6cfcc53e | 1492 | |
439d473b ACM |
1493 | while (!feof(file)) { |
1494 | char name[PATH_MAX]; | |
1495 | u64 start; | |
439d473b ACM |
1496 | char *sep; |
1497 | int line_len; | |
6cfcc53e | 1498 | |
439d473b ACM |
1499 | line_len = getline(&line, &n, file); |
1500 | if (line_len < 0) | |
1501 | break; | |
1502 | ||
1503 | if (!line) | |
1504 | goto out_failure; | |
1505 | ||
1506 | line[--line_len] = '\0'; /* \n */ | |
1507 | ||
1508 | sep = strrchr(line, 'x'); | |
1509 | if (sep == NULL) | |
1510 | continue; | |
1511 | ||
1512 | hex2u64(sep + 1, &start); | |
1513 | ||
1514 | sep = strchr(line, ' '); | |
1515 | if (sep == NULL) | |
1516 | continue; | |
1517 | ||
1518 | *sep = '\0'; | |
1519 | ||
1520 | snprintf(name, sizeof(name), "[%s]", line); | |
9de89fe7 | 1521 | map = map_groups__new_module(self, start, name); |
b7cece76 | 1522 | if (map == NULL) |
439d473b | 1523 | goto out_delete_line; |
b7cece76 | 1524 | dso__kernel_module_get_build_id(map->dso); |
6cfcc53e | 1525 | } |
439d473b ACM |
1526 | |
1527 | free(line); | |
1528 | fclose(file); | |
1529 | ||
9de89fe7 | 1530 | return map_groups__set_modules_path(self); |
439d473b ACM |
1531 | |
1532 | out_delete_line: | |
1533 | free(line); | |
1534 | out_failure: | |
1535 | return -1; | |
6cfcc53e MG |
1536 | } |
1537 | ||
9958e1f0 | 1538 | static int dso__load_vmlinux(struct dso *self, struct map *map, |
6beba7ad | 1539 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1540 | { |
fbd733b8 | 1541 | int err = -1, fd; |
a2928c42 | 1542 | |
fbd733b8 ACM |
1543 | if (self->has_build_id) { |
1544 | u8 build_id[BUILD_ID_SIZE]; | |
1545 | ||
1546 | if (filename__read_build_id(vmlinux, build_id, | |
1547 | sizeof(build_id)) < 0) { | |
1548 | pr_debug("No build_id in %s, ignoring it\n", vmlinux); | |
1549 | return -1; | |
1550 | } | |
1551 | if (!dso__build_id_equal(self, build_id)) { | |
1552 | char expected_build_id[BUILD_ID_SIZE * 2 + 1], | |
1553 | vmlinux_build_id[BUILD_ID_SIZE * 2 + 1]; | |
1554 | ||
1555 | build_id__sprintf(self->build_id, | |
1556 | sizeof(self->build_id), | |
1557 | expected_build_id); | |
1558 | build_id__sprintf(build_id, sizeof(build_id), | |
1559 | vmlinux_build_id); | |
1560 | pr_debug("build_id in %s is %s while expected is %s, " | |
1561 | "ignoring it\n", vmlinux, vmlinux_build_id, | |
1562 | expected_build_id); | |
1563 | return -1; | |
1564 | } | |
1565 | } | |
66bd8424 | 1566 | |
fbd733b8 | 1567 | fd = open(vmlinux, O_RDONLY); |
a2928c42 ACM |
1568 | if (fd < 0) |
1569 | return -1; | |
1570 | ||
3610583c | 1571 | dso__set_loaded(self, map->type); |
9de89fe7 | 1572 | err = dso__load_sym(self, map, vmlinux, fd, filter, 0); |
a2928c42 ACM |
1573 | close(fd); |
1574 | ||
1575 | return err; | |
1576 | } | |
1577 | ||
a19afe46 | 1578 | int dso__load_vmlinux_path(struct dso *self, struct map *map, |
9de89fe7 | 1579 | symbol_filter_t filter) |
a19afe46 ACM |
1580 | { |
1581 | int i, err = 0; | |
1582 | ||
1583 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
1584 | vmlinux_path__nr_entries); | |
1585 | ||
1586 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
9de89fe7 | 1587 | err = dso__load_vmlinux(self, map, vmlinux_path[i], filter); |
a19afe46 ACM |
1588 | if (err > 0) { |
1589 | pr_debug("Using %s for symbols\n", vmlinux_path[i]); | |
1590 | dso__set_long_name(self, strdup(vmlinux_path[i])); | |
1591 | break; | |
1592 | } | |
1593 | } | |
1594 | ||
1595 | return err; | |
1596 | } | |
1597 | ||
c338aee8 | 1598 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
9de89fe7 | 1599 | symbol_filter_t filter) |
a827c875 | 1600 | { |
cc612d81 | 1601 | int err; |
9e201442 ACM |
1602 | const char *kallsyms_filename = NULL; |
1603 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 ACM |
1604 | /* |
1605 | * Step 1: if the user specified a vmlinux filename, use it and only | |
1606 | * it, reporting errors to the user if it cannot be used. | |
1607 | * | |
1608 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1609 | * build-id, or if the user specifies the wrong path to the right | |
1610 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1611 | * x86_86 one, on the machine where analysis is being performed, say), | |
1612 | * or worse, /proc/kallsyms. | |
1613 | * | |
1614 | * If the specified file _has_ a build-id and there is a build-id | |
1615 | * section in the perf.data file, we will still do the expected | |
1616 | * validation in dso__load_vmlinux and will bail out if they don't | |
1617 | * match. | |
1618 | */ | |
1619 | if (symbol_conf.vmlinux_name != NULL) { | |
9de89fe7 | 1620 | err = dso__load_vmlinux(self, map, |
dc8d6ab2 ACM |
1621 | symbol_conf.vmlinux_name, filter); |
1622 | goto out_try_fixup; | |
1623 | } | |
cc612d81 ACM |
1624 | |
1625 | if (vmlinux_path != NULL) { | |
9de89fe7 | 1626 | err = dso__load_vmlinux_path(self, map, filter); |
a19afe46 ACM |
1627 | if (err > 0) |
1628 | goto out_fixup; | |
cc612d81 ACM |
1629 | } |
1630 | ||
b7cece76 ACM |
1631 | /* |
1632 | * Say the kernel DSO was created when processing the build-id header table, | |
1633 | * we have a build-id, so check if it is the same as the running kernel, | |
1634 | * using it if it is. | |
1635 | */ | |
1636 | if (self->has_build_id) { | |
1637 | u8 kallsyms_build_id[BUILD_ID_SIZE]; | |
9e201442 | 1638 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
1639 | |
1640 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 1641 | sizeof(kallsyms_build_id)) == 0) { |
9e201442 ACM |
1642 | if (dso__build_id_equal(self, kallsyms_build_id)) { |
1643 | kallsyms_filename = "/proc/kallsyms"; | |
8d0591f6 | 1644 | goto do_kallsyms; |
9e201442 | 1645 | } |
8d0591f6 | 1646 | } |
dc8d6ab2 ACM |
1647 | /* |
1648 | * Now look if we have it on the build-id cache in | |
1649 | * $HOME/.debug/[kernel.kallsyms]. | |
1650 | */ | |
9e201442 ACM |
1651 | build_id__sprintf(self->build_id, sizeof(self->build_id), |
1652 | sbuild_id); | |
1653 | ||
1654 | if (asprintf(&kallsyms_allocated_filename, | |
1655 | "%s/.debug/[kernel.kallsyms]/%s", | |
dc8d6ab2 ACM |
1656 | getenv("HOME"), sbuild_id) == -1) |
1657 | return -1; | |
1658 | ||
19fc2ded ACM |
1659 | kallsyms_filename = kallsyms_allocated_filename; |
1660 | ||
dc8d6ab2 | 1661 | if (access(kallsyms_filename, F_OK)) { |
9e201442 | 1662 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 1663 | return -1; |
9e201442 | 1664 | } |
dc8d6ab2 ACM |
1665 | } else { |
1666 | /* | |
1667 | * Last resort, if we don't have a build-id and couldn't find | |
1668 | * any vmlinux file, try the running kernel kallsyms table. | |
1669 | */ | |
9e201442 | 1670 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 1671 | } |
439d473b | 1672 | |
cc612d81 | 1673 | do_kallsyms: |
9de89fe7 | 1674 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); |
dc8d6ab2 | 1675 | free(kallsyms_allocated_filename); |
439d473b | 1676 | |
dc8d6ab2 | 1677 | out_try_fixup: |
439d473b | 1678 | if (err > 0) { |
cc612d81 | 1679 | out_fixup: |
e1c7c6a4 | 1680 | if (kallsyms_filename != NULL) |
dc8d6ab2 | 1681 | dso__set_long_name(self, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
1682 | map__fixup_start(map); |
1683 | map__fixup_end(map); | |
439d473b | 1684 | } |
94cb9e38 | 1685 | |
a827c875 ACM |
1686 | return err; |
1687 | } | |
1688 | ||
b0da954a ACM |
1689 | LIST_HEAD(dsos__user); |
1690 | LIST_HEAD(dsos__kernel); | |
cc612d81 | 1691 | struct dso *vdso; |
cd84c2ac | 1692 | |
b0da954a | 1693 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 1694 | { |
b0da954a | 1695 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
1696 | } |
1697 | ||
b0da954a | 1698 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
1699 | { |
1700 | struct dso *pos; | |
1701 | ||
b0da954a | 1702 | list_for_each_entry(pos, head, node) |
cf4e5b08 | 1703 | if (strcmp(pos->long_name, name) == 0) |
cd84c2ac FW |
1704 | return pos; |
1705 | return NULL; | |
1706 | } | |
1707 | ||
a89e5abe | 1708 | struct dso *__dsos__findnew(struct list_head *head, const char *name) |
cd84c2ac | 1709 | { |
a89e5abe | 1710 | struct dso *dso = dsos__find(head, name); |
cd84c2ac | 1711 | |
e4204992 | 1712 | if (!dso) { |
00a192b3 | 1713 | dso = dso__new(name); |
cfc10d3b | 1714 | if (dso != NULL) { |
a89e5abe | 1715 | dsos__add(head, dso); |
cfc10d3b ACM |
1716 | dso__set_basename(dso); |
1717 | } | |
66bd8424 | 1718 | } |
cd84c2ac FW |
1719 | |
1720 | return dso; | |
cd84c2ac FW |
1721 | } |
1722 | ||
b0da954a | 1723 | static void __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
1724 | { |
1725 | struct dso *pos; | |
1726 | ||
95011c60 ACM |
1727 | list_for_each_entry(pos, head, node) { |
1728 | int i; | |
1729 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
1730 | dso__fprintf(pos, i, fp); | |
1731 | } | |
cd84c2ac FW |
1732 | } |
1733 | ||
b0da954a ACM |
1734 | void dsos__fprintf(FILE *fp) |
1735 | { | |
1736 | __dsos__fprintf(&dsos__kernel, fp); | |
1737 | __dsos__fprintf(&dsos__user, fp); | |
1738 | } | |
1739 | ||
88d3d9b7 ACM |
1740 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
1741 | bool with_hits) | |
9e03eb2d ACM |
1742 | { |
1743 | struct dso *pos; | |
1744 | size_t ret = 0; | |
1745 | ||
b0da954a | 1746 | list_for_each_entry(pos, head, node) { |
88d3d9b7 ACM |
1747 | if (with_hits && !pos->hit) |
1748 | continue; | |
9e03eb2d | 1749 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 1750 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
1751 | } |
1752 | return ret; | |
1753 | } | |
1754 | ||
88d3d9b7 | 1755 | size_t dsos__fprintf_buildid(FILE *fp, bool with_hits) |
b0da954a | 1756 | { |
88d3d9b7 ACM |
1757 | return (__dsos__fprintf_buildid(&dsos__kernel, fp, with_hits) + |
1758 | __dsos__fprintf_buildid(&dsos__user, fp, with_hits)); | |
b0da954a ACM |
1759 | } |
1760 | ||
fd1d908c ACM |
1761 | struct dso *dso__new_kernel(const char *name) |
1762 | { | |
1763 | struct dso *self = dso__new(name ?: "[kernel.kallsyms]"); | |
1764 | ||
1765 | if (self != NULL) { | |
1766 | self->short_name = "[kernel]"; | |
1767 | self->kernel = 1; | |
1768 | } | |
1769 | ||
1770 | return self; | |
1771 | } | |
1772 | ||
1773 | void dso__read_running_kernel_build_id(struct dso *self) | |
1774 | { | |
1775 | if (sysfs__read_build_id("/sys/kernel/notes", self->build_id, | |
1776 | sizeof(self->build_id)) == 0) | |
1777 | self->has_build_id = true; | |
1778 | } | |
1779 | ||
de176489 | 1780 | static struct dso *dsos__create_kernel(const char *vmlinux) |
cd84c2ac | 1781 | { |
fd1d908c | 1782 | struct dso *kernel = dso__new_kernel(vmlinux); |
cd84c2ac | 1783 | |
2446042c | 1784 | if (kernel == NULL) |
f1dfa0b1 | 1785 | return NULL; |
c338aee8 | 1786 | |
00a192b3 | 1787 | vdso = dso__new("[vdso]"); |
c338aee8 | 1788 | if (vdso == NULL) |
f1dfa0b1 | 1789 | goto out_delete_kernel_dso; |
3610583c | 1790 | dso__set_loaded(vdso, MAP__FUNCTION); |
2446042c | 1791 | |
fd1d908c | 1792 | dso__read_running_kernel_build_id(kernel); |
cd84c2ac | 1793 | |
b0da954a ACM |
1794 | dsos__add(&dsos__kernel, kernel); |
1795 | dsos__add(&dsos__user, vdso); | |
cd84c2ac | 1796 | |
f1dfa0b1 | 1797 | return kernel; |
c338aee8 | 1798 | |
c338aee8 ACM |
1799 | out_delete_kernel_dso: |
1800 | dso__delete(kernel); | |
f1dfa0b1 ACM |
1801 | return NULL; |
1802 | } | |
1803 | ||
b7cece76 ACM |
1804 | int __map_groups__create_kernel_maps(struct map_groups *self, |
1805 | struct map *vmlinux_maps[MAP__NR_TYPES], | |
1806 | struct dso *kernel) | |
f1dfa0b1 | 1807 | { |
de176489 | 1808 | enum map_type type; |
f1dfa0b1 | 1809 | |
de176489 | 1810 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
9de89fe7 ACM |
1811 | struct kmap *kmap; |
1812 | ||
de176489 ACM |
1813 | vmlinux_maps[type] = map__new2(0, kernel, type); |
1814 | if (vmlinux_maps[type] == NULL) | |
1815 | return -1; | |
f1dfa0b1 | 1816 | |
de176489 ACM |
1817 | vmlinux_maps[type]->map_ip = |
1818 | vmlinux_maps[type]->unmap_ip = identity__map_ip; | |
9de89fe7 ACM |
1819 | |
1820 | kmap = map__kmap(vmlinux_maps[type]); | |
1821 | kmap->kmaps = self; | |
de176489 | 1822 | map_groups__insert(self, vmlinux_maps[type]); |
f1dfa0b1 ACM |
1823 | } |
1824 | ||
f1dfa0b1 | 1825 | return 0; |
2446042c ACM |
1826 | } |
1827 | ||
cc612d81 ACM |
1828 | static void vmlinux_path__exit(void) |
1829 | { | |
1830 | while (--vmlinux_path__nr_entries >= 0) { | |
1831 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
1832 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
1833 | } | |
1834 | ||
1835 | free(vmlinux_path); | |
1836 | vmlinux_path = NULL; | |
1837 | } | |
1838 | ||
1839 | static int vmlinux_path__init(void) | |
1840 | { | |
1841 | struct utsname uts; | |
1842 | char bf[PATH_MAX]; | |
1843 | ||
1844 | if (uname(&uts) < 0) | |
1845 | return -1; | |
1846 | ||
1847 | vmlinux_path = malloc(sizeof(char *) * 5); | |
1848 | if (vmlinux_path == NULL) | |
1849 | return -1; | |
1850 | ||
1851 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
1852 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1853 | goto out_fail; | |
1854 | ++vmlinux_path__nr_entries; | |
1855 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
1856 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1857 | goto out_fail; | |
1858 | ++vmlinux_path__nr_entries; | |
1859 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); | |
1860 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1861 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1862 | goto out_fail; | |
1863 | ++vmlinux_path__nr_entries; | |
1864 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
1865 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1866 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1867 | goto out_fail; | |
1868 | ++vmlinux_path__nr_entries; | |
1869 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
1870 | uts.release); | |
1871 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1872 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1873 | goto out_fail; | |
1874 | ++vmlinux_path__nr_entries; | |
1875 | ||
1876 | return 0; | |
1877 | ||
1878 | out_fail: | |
1879 | vmlinux_path__exit(); | |
1880 | return -1; | |
1881 | } | |
1882 | ||
655000e7 ACM |
1883 | static int setup_list(struct strlist **list, const char *list_str, |
1884 | const char *list_name) | |
1885 | { | |
1886 | if (list_str == NULL) | |
1887 | return 0; | |
1888 | ||
1889 | *list = strlist__new(true, list_str); | |
1890 | if (!*list) { | |
1891 | pr_err("problems parsing %s list\n", list_name); | |
1892 | return -1; | |
1893 | } | |
1894 | return 0; | |
1895 | } | |
1896 | ||
75be6cf4 | 1897 | int symbol__init(void) |
2446042c | 1898 | { |
95011c60 | 1899 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
1900 | if (symbol_conf.sort_by_name) |
1901 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
1902 | sizeof(struct symbol)); | |
b32d133a | 1903 | |
75be6cf4 | 1904 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
1905 | return -1; |
1906 | ||
c410a338 ACM |
1907 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
1908 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
1909 | return -1; | |
1910 | } | |
1911 | ||
655000e7 ACM |
1912 | if (setup_list(&symbol_conf.dso_list, |
1913 | symbol_conf.dso_list_str, "dso") < 0) | |
1914 | return -1; | |
1915 | ||
1916 | if (setup_list(&symbol_conf.comm_list, | |
1917 | symbol_conf.comm_list_str, "comm") < 0) | |
1918 | goto out_free_dso_list; | |
1919 | ||
1920 | if (setup_list(&symbol_conf.sym_list, | |
1921 | symbol_conf.sym_list_str, "symbol") < 0) | |
1922 | goto out_free_comm_list; | |
1923 | ||
4aa65636 | 1924 | return 0; |
655000e7 ACM |
1925 | |
1926 | out_free_dso_list: | |
1927 | strlist__delete(symbol_conf.dso_list); | |
1928 | out_free_comm_list: | |
1929 | strlist__delete(symbol_conf.comm_list); | |
1930 | return -1; | |
4aa65636 ACM |
1931 | } |
1932 | ||
9de89fe7 ACM |
1933 | int map_groups__create_kernel_maps(struct map_groups *self, |
1934 | struct map *vmlinux_maps[MAP__NR_TYPES]) | |
4aa65636 | 1935 | { |
9de89fe7 ACM |
1936 | struct dso *kernel = dsos__create_kernel(symbol_conf.vmlinux_name); |
1937 | ||
1938 | if (kernel == NULL) | |
1939 | return -1; | |
1940 | ||
1941 | if (__map_groups__create_kernel_maps(self, vmlinux_maps, kernel) < 0) | |
cc612d81 | 1942 | return -1; |
cc612d81 | 1943 | |
9de89fe7 ACM |
1944 | if (symbol_conf.use_modules && map_groups__create_modules(self) < 0) |
1945 | return -1; | |
90c83218 ACM |
1946 | /* |
1947 | * Now that we have all the maps created, just set the ->end of them: | |
1948 | */ | |
9de89fe7 | 1949 | map_groups__fixup_end(self); |
6671cb16 | 1950 | return 0; |
cd84c2ac | 1951 | } |